vacuum coating machine: 2016

2016年12月29日星期四

Vacuum coating equipment used at 8 o 'clock

1. Building hardware, sanitary hardware (water tap). The door. The door shake handshandle. Sanitary ware, locks, metal hinges, furniture, etc
2. Watchmaking: can be used for watchcase. Strap coating, crystal products
3. Other hardware: hardware leather. Stainless steel tableware. Glass frame, cutting tools, moulds, etc....
4. Large workpiece, automobile wheel hub, stainless steel plate. Signs. Sculpture, etc
5, stainless steel tube and plate (all types) on the surface of
6, furniture, lamps and lanterns, hotel appliances
7, locks, handles, bathroom hardware, golf head, stainless steel tableware, blood and other hardware products of hard decoration film plating.
8, watch, strap, glasses, jewelry ornaments such as super wear-resistant decorative plating (gold and silver) nano film and film and nano laminated film.

2016年12月26日星期一

What are the applicable scope of the vacuum coating machine?

Vacuum coating machine has been widely used in plastics, craft gifts, packaging, clocks and watches, jewelry, automobile and other industries, marketing throughout the country. We are in the process of operation, has formed an orderly, perfect quality management system. Furnace can choose made of stainless steel, carbon steel, or their combination double water-cooling structure.
According to technological requirements to choose different specifications and types of vacuum evaporation coating machine equipment, its type resistance evaporation, electron beam evaporation, magnetron sputtering, magnetron reactive sputtering, etc. Jig operation form with rotation, orbit and orbit + rotation. Vacuum system by the mechanical pump, diffusion pump, oil pump, enlargement pump, roots pump and molecular pump crucible round and match them all kinds of pneumatic, etc.
Choose plating system way according to the technical requirement and forms, such as resistance evaporation magnetron source to target material and size of arc source, light coating machine measurement can choose digital intelligent vacuum gauge and its quality measurement regulation, and other measurement instruments, such as automatic pressure control instrument, etc. Film thickness measurement can choose square resistance measuring instrument, through rate meter, etc. Inflatable way can choose mass flowmeter, flow meter + needle valve and the corresponding gas valve, and can choose multiple gas pipeline and the corresponding flow parameters.

2016年12月19日星期一

Vacuum coating equipment coating machine

Vacuum coating vendors would vacuum coating equipment vacuum coating when replace electroplating is the biggest challenge facing the diffraction properties of film layer preparation. Because the vacuum coating is done in a vacuum film preparation, film deposition is parallel to the evaporation source, workpiece must be in the face of the evaporation source, use widgets more structure, vertical plane of the... deposition rate even in preferable magnetron sputtering diffraction also is parallel to the plane of the evaporation source only one 5 of the deposition rate. More than this, the vacuum coating for the surface more artifacts or circular workpiece, cannot be used for complex artifacts, which are greatly limited the application of vacuum coating to replace water electroplating, slow down the pace of the application of vacuum coating of green environmental protection. For fasteners, the six sides need coating workpieces, usually using vacuum coating clips, hang card, will make the workpiece surface coating not blind spots, acid and alkali and water vapor and oxygen erosion, forming erosion point will aggravate corrosion of fasteners and so cannot use vacuum coating commonly used clamp fixed artifacts, hang card, and so on.
In order to solve this problem, this project designs a unique basket cage type workpiece, such as screw bolt fasteners in a workpiece in the basket, basket inside the cloth has a flip flap, when the basket cage workpiece cycloid reciprocating motion, fasteners, form the new face of sedimentary source side, multi-layer flip, so as to realize uniform coating of every side of fasteners.

2016年12月14日星期三

Multicellular structure characteristics and industrial application of coating machine

First introduces the classification of the coating technology, the structure characteristics of hard and soft substrate coating equipment and multicellular systems, modern winding coating machine, single room, double room and three chamber vacuum design, secondly introduces linear and cluster type multicellular structure characteristics of the coating machine, t...he last large vacuum coating equipment industry application and the progress are described.
The structure characteristics of hard and soft substrate coating equipment and vacuum chamber system more winding coating machine on the flexible material is continuous coating large specialized equipment. Whether to adopt the atmosphere to the atmosphere (air - to - air) or semi-continuous, basically see plated substrate thickness, productivity and economic benefits to comprehensive consideration of the equipment. Coating for paper and polymer and steelskin belt areas this scheme has certain advantages, the vacuum coating the coating of large area, some new varieties, more than in winding coating machine.
Generally fall into two categories:
(1) the capacitor, packaging and decoration such as vacuum coating.
(2) the thermal insulation, heat reflection or magnetic storage products vacuum coating.

2016年12月13日星期二

What to buy vacuum coating machine equipment should pay attention to?

Large investment funds items, we will be very careful when buying, it would be ready before the purchase of the required detailed understanding of the work done, a vacuum coating machines are not cheap, with the fast development of vacuum coating industry, for the film to be coated product requirements are also gradually increase, for the use of materials is also gradually expand the scope, and that the vacuum coating machine to keep the product in terms of rhythm with a certain challenge. Now we have to introduce a few precautions to purchase vacuum coating machine.

First, the configuration of the vacuum system: quality and price will always be proportional, regardless of what kind of technology the purchase of machinery and equipment, evaporation or, ions or, magnetron sputtering, or, the same function of the machine, with different configuration, the price is definitely a difference. In general, the use of materials on behalf configured well, the natural life will be longer, the efficiency will be higher, film better.

Second, the vacuum coating machine housing: If the surface, basically difficult to see is good or bad, not only from the surface gives the visual effect to distinguish the case basically every vacuum equipment manufacturers can be processed out. For the case should focus on sealing, welding is very important, if you buy back the equipment found to have leakage problems that customers will be very headache, even indirectly, some inexplicable problems, causes leak occur often because processing not good. Therefore, customers choose to buy vacuum coating machine / coating equipment when we must focus on processing power.

Third, the core technology: the different processes used in the core is not the same, unified call evaporation source, but it is a target head or electronic guns. If you do not have good evaporation source, basically not try to complete the stable quality of the coating. Good evaporation source is needed after years of constantly improve and perfect coating of data and then come out, do not understand the process of evaporation source manufacturers difficult to do. If what manufacturers say that their equipment does not include the process, some do not buy it.

Fourth, field trips, samples proofing: Before you buy or coating equipment vacuum coating machine, take samples to coating, check the film coating system is not able to reach their own requirements, its technical service and after-sales service is not perfect, combined with the above mentioned consulting Consulting more points, the last shop around

2016年12月8日星期四

Vacuum coating machine with stainless steel pneumatic valve

Stainless steel vacuum coating machine pneumatic valve works by rotary valve love to make the valve flow or occlusion. Pneumatic valve switch light, small size, can be made into large-caliber, reliable sealing, simple structure, easy maintenance, and spherical sealing surface often in the closed state, can not easily be eroded media, has been widely used in various industries.

Stainless steel vacuum coating machine pneumatic ball and plug valves belong to the same type, only its closure member is a sphere, the sphere rotating around the center line valve to achieve open, and close a valve.

Stainless steel vacuum coating machine pneumatic valve in the pipeline is mainly used for cutting speed, distribution and change the direction of flow of the medium. Pneumatic valve is a new type of valve is widely used in recent years, it has the following advantages：

1. Fluid resistance, its drag coefficient with the same pipe lengths are equal.
2. Simple structure, small size and light weight.
3. Compact and reliable valve sealing surface material widely used plastic, sealing, in true 4. Easy to operate, opening and closing rapidly, from fully open to fully closed as long as the rotation of 90 °, to facilitate remote control.
5. Easy maintenance, simple pneumatic valve structure, seals are generally activities, the removal replacement is more convenient.
6. When fully open or fully closed, the sealing surface and the dielectric isolation ball and seat, through the media, will not cause erosion of the valve sealing surface.
7. Wide range of applications, from small diameter to a few millimeters to a few meters from high vacuum to high pressure can be applied.

Stainless steel pneumatic valve has been widely used in various sectors of petroleum, chemical, power generation, paper, nuclear, aviation, rockets, as well as people's daily life.

2016年12月5日星期一

Aluminum vacuum machine vacuum metallized

Aluminized wide range gradually, with the development of modern industry, vacuum aluminum to meet the market demand is growing, more and more widely aluminized market, according to incomplete statistics, there are or will be invested plated enterprise aluminum industry projects hundreds, some huge scale, vacuum aluminum machine is very advanced.
Vacuum metallized paper jam: vacuum metallized paper jam is a metallic cardboard, which jams bright color, has a strong sense of metal, bright and elegant, in recent years a popular novel, advanced packaging materials.
Vacuum aluminum paper according to the production process and transfer into direct evaporation deposition method, also known as paper aluminum and aluminum membrane surface. Transfer method is placed after the PET film aluminum vacuum aluminum, glue and paper accord, in the PET film was peeled off and transferred to the surface by the action of cardboard glued aluminum molecules; direct deposited directly in aluminum vacuum machine direct plating methods made inside the vacuum chamber. Compared to the direct deposition, transfer evaporation method has the following features: You can produce a variety of patterns of the security vacuum aluminum cardboard, you can take advantage of the flatness of PET film makes more bright metallic luster paper.
Development: vacuum aluminum foil packaging materials gradually replaced the composite paper as a substrate, it is an environmentally friendly green packaging materials, because it itself can be recycled, biodegradable in soil and other characteristics. The first in the Western part of the country in the food, tobacco, daily necessities, toys, gift wrap, basically replacing the traditional vacuum metallized plastic film.
Aluminum vacuum coating system equipment as infrastructure aluminized and indispensable need to be customized or purchased finished, please contact customer service.

2016年11月30日星期三

For the characteristics of arc ion plating machine coating and effect

Now used in many electronic devices used in the city to the surface treatment, especially glass, lens this category has the gloss and the luminosity of high material, at present most of the surface coating method was adopted to process them. The vacuum coating machine is coating the surface of the main processing equipment, and said to the vacuum coating machine, in fact, n...ow most of the projector, mobile phone, computer electronic products are used in the coating machine.
Multi arc ion plating machine is adopted, high current, low voltage arc discharge technology equipment, this machine is specialized in the system of plating on the surface of the metal, glass, ceramics and other hard metal film, metal compound film and decorative film. Has the gloss of metal, glass surface, is not only so, this kind of coating material can also provide other items more stable isolation effect, to ensure that the surfaces will not direct contact with the outside world, which is "erosion". The current ion coating machine has the pumping speed fast, vacuum stability, large loading capacity, good coating uniform characteristics. But as a kind of typical vacuum coating machine, this machine with the principle of ion plating

2016年11月27日星期日

How do you know the vacuum coating machine is good or bad

Which you can see, the development of vacuum coating technology of vacuum coating machine and vacuum coating is closely tied to the successful development of oil.
This is decided by the effect of vacuum coating of oil. In the process of vacuum coating, vacuum coating machine coating of oil to play the role of a strong bonding pieces and metal film plated (i.e., as the plating pieces of floor coating); After vacuum coating, should be coated with a layer of oil coating on the surface of the plating, then the oil and protect the metal film and dyeing effect (i.e., as a plating coating). Most of the material before a coating, must be coated with a thin layer of oil coating on the surface of the plating, thoroughly dry again after coating, otherwise, the plating on the metal film off, with the hand gently wipe away.
Vacuum coating machine is good or bad decision factors:
In the process of vacuum coating, coating quality depends greatly on the quality of the coating. Through the application of vacuum coating technology, plastic surface metallization, combine organic materials and inorganic materials, greatly improved its physical and chemical properties.

2016年11月22日星期二

Vacuum coating factory introduction of vacuum coating machine

Vacuum coating machine mainly refers to a kind of need to be done under high vacuum coating, including many types, including vacuum ion evaporation, magnetron sputtering, MBE molecular beam epitaxy, PLD laser sputtering deposition and so on many kinds. The main idea is divided into evaporation and sputtering.
Organs of vacuum coating machine order
1. Close the high vacuum header, molecular pump.
2. Stay molecular pump to 50, in turn off valve, former level, high mechanical pump, this time takes about 40 minutes.
3. Below 50, to maintain the pump.
Vacuum coating machine
1. Building hardware, sanitary hardware (water tap). The door. The door shake handshandle. Sanitary ware, hardware hinges, furniture, etc.
2. Watchmaking: can be used for watchcase. Strap coating, crystal products.
3. Other hardware: hardware leather. Stainless steel tableware. Glass frame, cutting tools, moulds, etc.
4. Large workpiece, automobile wheel hub, stainless steel plate. Signs. Sculpture, etc.
5, stainless steel tube and plate (all types) on the surface of
6, furniture, lamps and lanterns, hotel appliances.
7, locks, handles, bathroom hardware, golf head, stainless steel tableware, blood and other hardware products of hard decoration film plating.
8, watch, strap, glasses, jewelry ornaments such as super wear-resistant decorative plating (gold and silver) nano film and film and nano laminated film.

2016年11月20日星期日

Various working principle of Vacuum coating equipments

Vacuum coating equipments can be divided into: evaporation vacuum coating equipments, magnetron sputtering vacuum coating equipments and ion plating vacuum coating equipments.
Evaporation vacuum coating machine working principle is to put the coating materials into the vacuum chamber,heating to evaporate the evaporation source, when the mean free path of molecules is greater than the linear dimensions of the evaporation vacuum coating chamber, atomic and molecular vapor escaping from the surface of the evaporation source, little impact and impede other molecules or atoms, can be plated directly to the surface of the substrate, due to the low temperature of the substrate, and then condense on film.
Magnetron Sputtering vacuum coating machine is formed by a vacuum glow discharge, accelerate the positive ions bombard the target so that the sputtering phenomenon caused by the surface, so that the target surface deposition of particles emitted onto the substrate to form a film.
Multi-arc ion vacuum plating machine is the use of a vacuum arc discharge evaporation source count for technology that ignited the evaporation source (cathode) in a vacuum environment, between the anode and the formation of a self-sustaining arc discharge, both cathode material released from the cathode arc shining point ions. Since the current local concentration, the Joule heat generated by the cathode material locally explosively into plasma, under the influence of operating bias of a compound with the reaction gas, and the deposition is formed on the surface plated layer.

2016年11月16日星期三

Vacuum coating equipment ABS plastic plating common process

Vacuum coating equipment ABS plastic plating process can be divided into three parts, this is the pre-treatment process, chemical plating and electroplating processes. Each section contains a number of processes or procedures.
(1) vacuum coating equipment ABS plastic plating pretreatment process for pre-treatment process, including surface finishing, stress checks, degreasing and coarsen...ing.

① surface finishing. ABS plastics before the treatment, to be a surface finishing, this is because in the plastic injection molding process there will be residual stress. Special gates and a portion corresponding to the gate, there will be the internal stress.

② the stress screening method. At room temperature injection molded ABS plastic release acetic immersed 2 ~ 3min, then carefully cleaned surface, dry.
③ degreasing. You can have a lot of choice in addition to oil business, after degreasing, first wash in hot water, then wash in water, and then in a 5% sulfuric acid neutralization, and then cleaned before entering the roughing process, so you can protection roughening solution so life is extended.

④ coarsening. ABS plastic roughening methods there are three types, namely high acid, high chromic acid and phosphoric acid type, from the point of view of environmental protection, it should adopt the high sulfate type.
(2) vacuum coating machine ABS plastic plating process plating process includes sensitization, activation, electroless copper or nickel plating
3) vacuum coating machine ABS plastic plating process is divided into thick plating, decorative and functional electroplating plating three.
① vacuum coating equipment thicker plating. Due to the chemical coating is very thin, make metalized plastic achieve the effect, the coating must have a certain thickness, so to thicken after plating plating.
② vacuum coating equipment decorative plating decorative plating can be a copper-nickel-chromium process, it can be bright copper then other finishing, such as brushing bronze after treatment, it can be bright nickel plated copper after adding in the light, then plated imitation gold.
③ vacuum coating equipment functional electroplating. Functional functional purpose actually depends mainly on the nature of the surface electroplated coating to be embodied. In fact, from a broad perspective, also a decorative function, but the function mentioned here, or physical or chemical means, or electrical properties. For example the conductive coating, reflective coatings, electromagnetic shielding coating, welding coating and the like.

2016年11月13日星期日

Analysis Principle vacuum coating equipment

Principle is the principle of magnetron sputtering vacuum coating equipment , as follows:
Colliding electrons accelerated in the electric field toward the substrate during in and argon atoms, a large number of ionized argon ions and electrons, the electrons onto the substrate. Argon ions accelerated in the electric field bombardment target, a large number of target atoms sputtered, neutral target atoms... deposited in a film on the substrate.
Secondary electrons accelerated toward the substrate in the process influenced by the magnetic force of the magnetic field Lorenzi, bound within plasma region near the target surface, a high plasma density region, under the effect of the secondary electrons around the magnetic field the target surface in a circular motion, the motion path of the electrons is very long, constantly in motion the process of collision ionization of argon atoms with a large amount of argon ion bombardment target, after several collisions electron energy decreases, get rid of the shackles of the magnetic field lines , away from the target, eventually deposited on the substrate.
Magnetron sputtering is bound to a magnetic field and to extend the path of movement of electrons, the electrons change the direction of motion, increase the ionization rate of the working gas and the efficient use of energy of the electron vacuum coating apparatus.
Electronic destination just substrates, the vacuum chamber wall and the target source anode is electronic home. But generally the vacuum chamber and the substrate and the anode potential in the same. Interaction between magnetic field and electric field so that a single spiral electron trajectory in three dimensions, and not only in a circular motion in the target surface. As for the type of the target surface sputtering the circumferential contour, and that the magnetic field lines are targets of the circumferential shape of circular. Distribution of magnetic field lines in different directions will film a great relationship.
Coating machine manufacturers said, not only in the interaction mechanism magnetron sputtering magnetic and electric fields of work, multi-arc plated target ion source, a plasma source and so work under this principle. The difference is that the electric field direction, voltage and current magnitude only.

2016年11月10日星期四

Car paint coating merchants to introduce the benefits of the coating

Application of coating on the eyes, coating are commonly used in the camera lens, such as myopia, hyperopia, presbyopic glasses corrective lenses.
Coating is very thin, transparent film on the surface plating. The purpose is to wish to reduce the reflection of light, increase light transmittance, anti-ultraviolet radiation and minimizing down, ghost; Different colors of coating, also make different imaging color balance. In addition, the coating can be delay aging lens, color changing time.
Application in automobile, coating and beauty is the highest measures of protection of paint, can avoid oxidation, to brighten up to the paint, acid and alkali resistance, oxidation resistance, resistance to ultraviolet radiation, such as multiple functions. Because itself is a kind of inorganic membrane materials, no damage to paint.
In to the car coating, the color of its body due to aging embrittlement of paint and corrosion formation of oxide layer will go away for years. Can increase the surface hardness, avoid scratches and small aperture. Hold time is longest, about more than a year.
Coating is not perfect, the brightness is inferior to seal glair when finished plating membrane, therefore is not suitable for love beautiful juyou, vehicle coating price in one thousand yuan of above.
The principle of coating, the coating is mainly in order to reduce the reflection. In order to improve the light transmittance of lens and the quality of the image, in the modern lens to the lens coating manufacturing process. Lens coating is according to the principle of optical interference, on the lens surface plating layer thickness of about a quarter wavelength of the material (usually a fluoride), make the lens to the wavelength of light reflection to a minimum. Obviously, a membrane only work on a light, and multi-layer coating can work on a variety of colours. Multilayer coating with different materials usually repeatedly on lens surface plating layer with different thickness. Multilayer coating can greatly improve the light transmittance of the lens, for example, without coating on the surface of the lens every reflectivity of 5%, after the single layer coating down to 2%, and the multi-layer coating can be down to 0.2%, in this way, can greatly reduce the diffuse reflection between each camera lens, so as to improve the contrast of image and Octavia degrees.

2016年11月6日星期日

How much arc ion coating machine furnace structure

Vacuum evaporation coating machine vacuum equipment used by the structure of the material, should have a certain vacuum performance and some necessary performance. With sufficient air tightness. Manufacture vacuum equipment used materials must be compact structure, the material surface and internal shall not have cracks, holes or other defects may cause leakage. To avoid using porous, rough structure of the material, material absorption and adsorption gas should be less as far as possible, and easy for deaeration, make the material in a vacuum has smaller abandon rate; Saturation vapour pressure is low enough, without affecting the vacuum degree of system; Good mechanical strength.
Can splash control sputtering coating machine must have enough mechanical strength and stiffness, the pressure difference under the not damage and deformation under the working conditions; Material should be used in the chemical stability is good, not easy to oxidation and corrosion, does not react with a working medium in the system. Temperature stability is good. Could reach in the working process of the maximum and minimum temperature range, can maintain the vacuum performance, mechanical properties, physical properties, and chemical properties. Easy cleaning \ processing, easy to get high smooth surface.

2016年11月2日星期三

Ion plating is what

Ion plating processing including sputtering deposition and ion plating in two ways. Ion sputtering coating is a kind of coating method based on ion sputtering effect, applicable to the alloy membrane and compound membrane plating system. Splash control sputtering coating machine
Ion plating is in vacuum evaporation coating and sputtering coating developed on the basis of a new technology of film coating, will all kinds of gas discharge mode is introduced into the field of vapor deposition, the vapor deposition process is carried out in the plasma. Particle energy ion plating has greatly increased the membrane layer, can obtain more excellent performance of membrane layer, expanded the application field of "thin film". Is a fast-growing, popular with people of the new technology.
Ion plating is characterized by: coating, artifacts (substrate) with negative bias, the artifact is always affected by high-energy ion bombardment. Good form membrane layer of film adhesion, good film layer winding plating, membrane organization more controllable parameters, membrane layer overall high energy particles, easier for deposition reaction, can get compound membrane layer at lower temperatures.

2016年10月31日星期一

Vacuum coating machine to change the plastic industry

Plastic products surface metallization, applications will be more extensive. Vacuum coating on the surface of the plastic parts can be divided into functional coating and decorative coating. As a functional coating, it can improve the physical and chemical properties on the surface of the plastic parts, such as the size of the plastic parts can be improved stability, electrical conductivity, etc.; As a decorative coating, can make the plastic parts surface with metallic luster, and according to the needs of actual decoration create a different color, such as gold, bronze and metal red, metal green, blue, etc., specific see sample show.
Vacuum evaporation coating machine is the most widely in the application of plastic products. Plastic has easy molding, low cost, light weight, no corrosion and other characteristics, widely used plastic products, but because of its disadvantages restricted the expand application, such as not beautiful, easy to aging, poor poor mechanical properties, heat resistance, bibulous rate is higher. Through the application of vacuum coating technology, plastic surface metallization, combine organic materials and inorganic materials, greatly improved its physical and chemical properties. The main advantages are
A, easy to clean, no dust collection;
Second, make plastic surface conductivity;
Three, improve beautiful, smooth surface, the metallic color, adornment sex is greatly improved;
Fourth, reduce water absorption, the larger the number of light coating machine, the less pinhole, bibulous rate is lower, product is not easy to deformation, improve the heat resistance;
Fifth, improve the surface hardness, the original plastic surface than metal soft and vulnerable, through vacuum coating, hardness and wear resistance increase greatly;
Six, improve the weatherability, general plastic in the outdoor aging fast, the main reason is caused by ultraviolet irradiation, and after plating aluminum, aluminum with ultraviolet the strongest reflection, therefore, the weather is greatly increased.

2016年10月26日星期三

The influencing factors on the quality of the vacuum coating machine coating

Should often clean vacuum chamber, vacuum environment to maintain the health: vacuum health health is first cavity gas. The cavity gas should have enough purity and stability. The second is cavity body health. Cavity should keep the corresponding cleanliness. There can be no dust, waste metal scraps. Because of the metal vapour and gas ionization can make cavity adhesion dirt, should keep clear of in time. Otherwise, accumulate over a long period will be more difficult to remove. Only guarantee the vacuum health can guarantee the quality of coating.
The stability of the gas flow: only the stable flow to maintain the stability of cavity environment, to ensure stable temperature, the thermal stress in the film by uniform stability, ensure effective membrane adhesion strength.
The stability of the vacuum, vacuum degree to produce a great impact on the various types of production process. The coating process is no exception. Such as material in vacuum, the boiling point is lower than in the atmosphere, under the condition of vacuum can lower the temperature of the material needed for a large amount of evaporation, and in the vacuum coating interior coating material can be evaporated at lower temperatures. Corresponding less oxygen in low vacuum area, the possibility of oxidation was greatly decreases, and vacuum coating can get high purity has the practical value of the coating layer. So the stability of the vacuum degree can effectively guarantee the experiment parameters, ensure the quality of coating.
Circulating water cooling in time (mainly pump can work properly) : an effective cooling circulating water is also a stable experimental conditions and the experimental parameters. The main equipment is pump. So in determining the water tank filled with water under the premise of enough to ensure the normal work of the pump.

2016年10月23日星期日

Vacuum equipment widely used?

Vacuum equipment widely used? Vacuum now this phrase has been widely applied to various fields, vacuum purpose is to protect, vacuum is one of the most clean, the limits of a vacuum there is no pollutants, make the product reduce the impurity hit, and thus to minimize damage and to make up for insufficient and defect in normal circumstances, it is also very bullish on and love the cause of the vacuum of the masses.
Some products, for example, when the coating if exposed to air, will react and air inside of gas and dust, but the use of vacuum coating equipment can avoid these problems.
For food, vacuum can be stored for a long time don't let bad food, the food in vacuum drying, easy deliquescence can keep the same number of cases.
, so to speak, not only in the industrial production, even in daily life, we all can't leave dependence on vacuum, the vacuum equipment manufacturing is based on this, r&d and production of various types of vacuum equipment manufacturers must deeply realize that what's the purpose vacuum, vacuum coating machine, the company said only know that, in the research and development of vacuum equipment modification, don't deviate from the track, can be developed are more likely to make people satisfied with the products.

2016年10月20日星期四

Vacuum evaporation coating machine and the magnetron sputtering plating aluminum function

Vacuum evaporation coating machine and magnetron sputtering plating aluminum function, electron beam evaporation vacuum coating machine and magnetron sputtering plating aluminum function analysis research, in order to obtain features outstanding semiconductor electrode Al film, we optimized technical parameters, the preparation of a series of superior function of Al thin films. Through theoretical calculation and function test, analysis compared the vacuum coating equipment, electron beam evaporation and magnetron sputtering characteristic of two kinds of method preparation of Al film.
Strict control of Al film thickness is very important, because the thickness of Al film will directly influence the other functions of the Al film, and then influence the reliability of semiconductor devices. About the high back pressure power tube, its high working voltage, current, not necessarily the thickness of the metal film will form into Al membrane current density per unit area is too high, easy to burn. On semiconductor equipment normally, Al thin layer, the continuity of the membrane is poorer, island shaped or mesh structure, lead to pressure welding lead hard, not easy pressure welding or bonding not firm, and then affect the rate of finished product; Al layer too thick, resulting in lithography graphics can't see, when a difficult and prone to marginal corrosion and corrosion "article".
Selects the electron beam evaporation vacuum coating machine, planetary organization uniform rolling when packing film, the probability of each substrate in the accumulation of Al film equality; Planet group gathering in the pot steamed originate, each substrate accumulation rate under vacuum must be flat. Selection of vacuum coating machine magnetron sputtering deposition method, because of accumulation can target current and voltage control, is also sputtering power can regulate and control, so the film thickness has good controllability and repeatability, and can be made in larger appearance even thickness of film.
Reflect the Al film and substrate adhesion between each other forces, it is also an important factor to ensure equipment is durable. Vacuum coating equipment sputtering atom energy is 1 to 2 orders of magnitude higher than evaporation atomic energy. Vacuum coating machine energy accumulation of sputtering atom in the substrate is much taller than evaporation atomic energy conversion, high heat, some high-energy sputtering atom occur, different degree of written representation forms a layer of sputtering atom in the substrate and the substrate layer the amalgamation of the pseudo dispersed to each other, and, in the process of vacuum coating equipment film-forming substrate and activation has been in the plasma is clean, clear the sputtering atom adhesion is not strong, purification and activate the substrate surface, enhanced sputter atoms and substrate adhesion, thus higher sputtering Al film and substrate adhesion.

2016年10月17日星期一

How a full range of vacuum coating machine equipment maintenance

Continuous use of more than 12 months for vacuum coating equipment, the inside of the pumping speed will be slow, that is about to do a good job cleaning in a timely manner. First filling the air, down connection pipe, unload electric furnace plate and nozzle. Pump cavity and pump gallbladder points three times cleaning, use gasoline to clean again, first with detergent to clean it again, then clean with clear water thoroughly clean. After being dried, rejoin the pump oil, packed pump, and put back into the body, can restart. Before restarting, attention should be paid to leak detection work. Start the maintain pump, close the door, after a few minutes, observe whether diffusion pump part of the vacuum degree is 6 x10 palmer, otherwise for leak detection. Check whether the connection place o-ring seal, or crush seal ring. Eliminate leakage hidden trouble is heating, or diffusion pump oil will burn ring, unable to enter the working state.
Each completed more than 200 coating procedures for vacuum coating equipment, should be a clean the studio. Multi arc ion plating factory house that swab repeatedly with caustic soda saturated solution vacuum chamber wall, (pay attention to safety can not direct contact with caustic soda solution, so as not to burn) purpose is to make up the membrane material plating aluminum react with caustic soda, membrane layer falls off after reaction, and release hydrogen, reoccupy clear water clean vacuum chamber and a cloth stained with gasoline to clean the dirt in the valve, if you need a light coating machine, please contact us, price concessions, service is good.
Thick in the vacuum coating equipment should change new oil pumping work continuously for 30 days. The old oil discharged completely within the pump. Screw bolt playback oil, add new oil to the quantitative.

2016年10月13日星期四

Non-conductive vacuum coating decoration process quality analysis

In recent years, electronic communications product renewal speeds up, the appearance of the consumers for this kind of product demand is higher and higher, the use of vacuum coating decoration process can make the surface of metallic simple sense at the same time, it can improve the product surface wear resistance and impact resistance performance. However, the use of vacuum coating decoration, in electronic communication products plating metal layer on the surface but will make its shell has a conductive performance, serious impact on the communication function of electronic communication products. Therefore, the use of non-conductive vacuum coating decoration process become inevitable choice.
Non-conductive vacuum coating applied to the plastic products surface decoration decoration process, especially in electronic communication products, plastic shell surface decoration has significant advantages, however, use non-conductive vacuum coating plastic products surface decoration, and compared to the conventional vacuum coating decorative surface of the plastic products, there is an obvious quality problem, restricts the non-conductive vacuum coating technology promotion and application of the following will discuss non-conductive vacuum coating decoration process of typical defects are analyzed, and the quality defects summarizes the related countermeasures.

2016年10月11日星期二

Vacuum coating machine market purposes

Many consumers concept of vacuum coating machine is not very understand, don't know the market use of vacuum coating machine, vacuum coating machine actually there are plenty of derivatives, and is closely related to the consumer, we are looking for coating machine friends generally in the following industries: a class is adornment is given priority to, highlight its decorative function, commonly used in coating plastic toys gift packaging, mobile phone shell, shell on digital products, Windows, gold-plated ceramic tile, etc.
Another kind is give priority to in order to function, highlight the function of the coating application. Will be using the following industry: solar thermal collectors, glasses and the lens of anti-reflection against high, following from the anti-radiation shielding, cutting tool plus hard, mould and hard.
More than two types of industries have close relationship with vacuum coating machine, so in the life, vacuum coating machine is very important.

2016年10月8日星期六

Vacuum coating machine can be used in which industry?

Coating machine according to its application field is very wide, can be divided into electronic evaporation coating machines, magnetron sputtering coating machine, rf plasma coating machine, coating machine, guan coating machine equipment and so on, but their structure is the same:
Mainly consists of three parts: subject of vacuum, vacuum chamber, the auxiliary exhaust system (including exhaust system, vacuum measurement system), evaporation system (including the crucible and rotary control system, electron gun cabinets), film forming control system.
Mainly used in hardware, glass crafts, ceramic crafts, etc., such as watches, computers, mobile phones, metal shell, sanitary ware, tools, models, electronic products, plastic products, acrylic, crystal glass products, ceramics, resin, etc., cosmetic bag, etc, arts and crafts, plastic following, electronic products, building materials industries, lamps and lanterns, mobile Windows, eyes, stage lighting, and so on.

2016年9月29日星期四

The advantage of tial

Compared with general ion plating technology, multi arc ion plating has many advantages, such as high ionization rate, fast deposition rate, and can be on the applied bias to further improve the matrix deposition, ion energy so as to achieve the membrane/bonding strength, etc, which makes the multi arc ion plating process the rigid structure of thin film deposition TiN class played an important role.
Multi arc ion plating technology can be used to the preparation of gold TiN film, TiC film of black, brown and green ZrO TiAIN membranes, etc. The film has good adhesion, not easy to fall off, diffraction, uniform thickness, coating density, low porosity, etc. At the same time, it can be plated material is wide, can be plated on the surface of the metal and nonmetal is made of metal or metal membrane reaction, saving precious metal materials, free from contamination. As a kind of ideal decorative coating preparation method, multi arc ion plating decorative coating from plating watchcase, strap to ceramic tile, sanitary ware, stair handrail, hall of cylindrical and car body, power distribution cabinet put oneself in another's position, etc. Has been widely used in People's Daily lives and many fields of industrial products.

2016年9月26日星期一

How to measure the thickness of vacuum coating film?

In the use of vacuum coating machine after coating, in order to measure the thickness of the film, may be measuring the thickness of the film with what method?
Quartz crystal is the most direct coating method trace balance method (QCM design), the instrument evaporation source, can be directly driven by the PID control loop drive panel, keep the evaporation rate.
As long as the instrument connected with the system control software, it can control the entire coating process. But the accuracy of the (QCM design) is limited, in part because of its monitoring is the quality of the coating instead of the optical thickness.
And although the QCM design is very stable at low temperatures, but at high temperature, it becomes very sensitive to temperature. After a long period of heating process, it is hard to stop sensor is sensitive to fall into this area, which cause significant error on membrane layer.
Optical monitoring is the first choice for high precision coating monitoring way, this is because it can be more precise control of film thickness (if used properly).
Accuracy improvement comes from many factors, but the most fundamental reason is the optical thickness monitoring.

2016年9月23日星期五

Vacuum coating equipment choice points

▲ optional double water-cooled furnace body structure made of stainless steel, carbon steel, or combinations thereof of.
▲ resistive and inductive heating in the form of two kinds, resistance heating materials molybdenum wire (band), tungsten (band), a graphite rod (plate), tantalum rods, nickel chromium wire (with) several types according to different temperature and process requirements for selection.
▲ heat insulation layer metal and composite two, choose according to different process conditions.
▲ vacuum system consists of a mechanical pump, diffusion pump, oil booster, augmentations pumps, vacuum pumps, etc., and they are matched with a variety of pneumatic, manual, electric valves, piping, etc., can choose according to process requirements.
▲ temperature control system can choose different types of thermometer, temperature control and their sensing element.
▲ intelligent vacuum measurement optional digital vacuum gauge and measure the quality of regulation to ensure the accuracy of the degree of vacuum and product reliability.
▲ can be equipped with multi-point recorder for the whole process analysis, quality control and production management.
▲ According device characteristics, manual, semi-automatic, or a combination of control.
▲ according to the requirement with a variety of inflatable type, mass flowmeter, rotameter, to meet the inflation pressure controlled, multiple inflatable requirements.
▲ of water over-temperature, temperature deviation large, furnace, pumps, heat exchangers, etc., phase diffusion pump, furnace inflatable overvoltage, insufficient gas supply pressure, overcurrent and overvoltage, open circuit and other abnormal situations audible alarm and perform the appropriate protective measures.
▲ fast cooling system and the heat exchanger can choose natural cooling cycle mode, may be used for large-capacity electric furnace outer fast circulating cooling system to improve the cooling rate.

2016年9月20日星期二

Works multi-arc ion plating machine and application description

Multi-arc ion vacuum coating machine is an efficient, safe, pollution-free ion plating equipment, with deposition speed, ionization rate, ion energy, the equipment is simple, low cost, the advantages of producing a large quantity.
Ion plating fact ion sputtering, the conductive target, DC bias power supply; non-conductive targets, using pulsed bias supply. Some multi-arc ion coating machines, you may also need a DC arc or pulsed arc power supply. Bias power supply is in fact between the cathode and the anode position sample bias electric field where the formation is generally negative high voltage cathodes. Free electron emission cathode surface directional acceleration in the electric field emission electron impact gas molecules, so that the ionization, and the gas is expelled electrons are accelerated by the electric field of continuing ionized molecules of other gases, continuous form avalanche effect, hit the gas wear, the formation constant of ionization current. In this case ions are accelerated to bombard the target, the target material atoms expelled surface, and deposited on the sample surface.
Application of multi-arc ion coating machine, multi-arc ion coating machine for different grades of hardware products, general construction hardware, locks, multi-arc ion plating equipment capable, high-grade products such as strap, case, glasses , mobile phone shell, golf equipment, sanitary ware, jewelry, and other commonly used arc / IF (+ DC) magnetron sputtering composite coating equipment, the choice of the size of the models based on loading. The device can be plated gold color, rose gold, brown, brown, tan, blue and other decorative film.

2016年9月13日星期二

The advantage of tial

2016年9月7日星期三

Vacuum coating machine system characteristics

Vacuum coating machine in plasma beam sputtering, uniform sputtering ion etch target surface, and will not make the target surface oxidation. Compared with magnetron sputtering, the plasma beam is generated by the rf plasma source and the role of the magnetic field is the plasma beam convergence and deflection to the target surface, therefore, although plasma beam sputtering coating system also has a magnetic field, but its effect to the magnetic field does not control sputtering, which abandoned the magnetron sputtering caused by uneven magnetic field in the "magnetic control" shortcomings. In sputtering, after the completion of the target material utilization rate can be as high as above 90%.
Vacuum coating machine, magnetron sputtering and plasma beam sputtering target surface etching after contrast figure. Due to greatly improve the utilization rate of target material, has solved the difficult to overcome shortcomings of magnetron sputtering, which results in uneven etching of the target poisoning
Vacuum coating machine in addition, magnetron sputtering produce sputtering runway due to uneven magnetic field on the back of the magnet, the magnetic field is prone to oxidation zone, so it is difficult to deposit of ferromagnetic materials, and in the plasma beam sputtering with no magnet as plasma constraint, ability of ferromagnetic material coating, and can use the thick target material, in figure 3 experimental cobalt metal thickness is 6 mm. For iron, nickel, chromium and ferromagnetic compounds, plasma beam sputtering are also has a high sputtering rate.
A further advantage of application of the coating technology system, when the electromagnetic coil polarity reverse connection, due to the direction of the magnetic field produced change, plasma beam bombardment under the action of a magnetic field of the substrate, thus substrate cleaning action, as shown in figure 4. This can actually make the application of the technology of coating machine to omit conventional coating machine cleaning with ion source.

2016年9月5日星期一

Vacuum coating vendors would coating technology application profile

Vacuum coating vendors would coating technology application profile
Is the most common wet coating deposition process we see glass coated with silver mirror, in some places is still in use today. Common wet French pattern on the plating items is to use chemicals to produce chemical reaction, reaction of adhesive on the surface of plated items, and combine together to form a layer of coating.
Wet coating work elements are:
1. Chemical agents to participate in chemical reactions
2. The chemical reaction pool
3. The auxiliary additives
4. The catalyst
5. Reaction electrode
We can see that due to the preparation of coating chemical reaction method, people can't accurate control of chemical reaction in the pool every small areas of the situation, to a great extent, people couldn't sophisticated control layer in the process of production of uniform thickness. In quite a number of cases is plated items do not allow to have a chemical reaction. For example, in the single pervious to light glass coating production such as glass and chemical reaction is likely to damage of the glass surface, pervious to light fall, it would be lost to the coating. Were the most serious questions, most used chemicals, auxiliaries, strong catalyst are polluting, some are highly toxic, he brings to the human and the nature, even catastrophic damage is huge. Some film system cannot be prepared with chemical method.

2016年8月30日星期二

Vacuum coating machine leak detection method

Vacuum coating vendors would introduce leak check is to ensure that the vacuum degree of vacuum coating machine a check measures, referred to as "leak detection, vacuum degree of high and low is directly affect the coating effect, so the leak detection is necessary.
General vacuum indoor air leakage from the chamber wall of small holes or component part (s) before the connection of a fine seam, is formed in the extraction system make vacuum indoor pressure drop after extraction, external and internal pressure gas from high pressure of the external flow of low pressure vacuum inside, cause the loss of vacuum.
Vacuum coating plant is introduced in the process of leak detection, need to pay attention to some problems, can put the leak detection work well.
First, want to make sure the leak is virtual or real leakage, because the workpiece material can produce gas in different extent after heating, possible mistake from external flow into gas, this is the virtual leak, to eliminate this kind of situation.
Second, test the vacuum chamber of the gas seal performance, ensure airtight performance meets the requirements.
Third, check the leakage hole size, shape, position, the speed of air leakage, preparation of solutions and implement.
Fourth, determine the smallest can leak detection rate and the leak detection sensitivity of testing instruments, to detect the leakage situation of maximum range, avoid some drain holes are ignored, improve the accuracy of leak detection.
Fifth, to grasp the leak detection instrument, reaction time and the elimination of time, the time to master well, ensure the leak detection instrument work in place, less time, leak detection effect is poor, time grew, waste gas leak detection and artificial electricity bills.
Sixth, to avoid leaking hole blockage, sometimes due to error, leak detection process, some dust or liquid and so on, the leakage hole was blocked by a thought in the position does not leak, but when the blockage due to the pressure difference inside and outside to improve or for other reasons make the leakage hole is not blocked, and that there is a gas leak.
For vacuum coating equipment to do a good job of leak detection is very important, the cause of vacuum drop varied, we want to solve these reasons one by one, stable coating effect.

2016年8月25日星期四

What products include vacuum equipment?

Complete vacuum equipment from a combination of a large number of components, with the development of vacuum equipment by industry can differentiate into different industry equipment, used in many of the basic industrial products. Composed of vacuum equipment can be divided into four parts: First, get a vacuum device, and second, carrying vacuum equipment, vacuum measuring instruments Third, Fourth, vacuumaccessories.
Vacuum equipment
Vacuum equipment is a pump, subdivision include: Roots vacuum pumps, reciprocating pumps, rotary piston vacuum pumps, rotary vane vacuum pumps, liquid ring vacuum pumps, steam pumps, jet pumps, molecular pumps, ion pumps. Need to learn more about the data and parameters for each pump, vacuum pump products please venue area.
Vacuum carrying equipment
That is the main bearer of vacuum equipment vacuum equipment, each industry is different, such as coating industry called vacuum coating equipment, drying industry called vacuum dryer, the packaging industry called vacuum packing machines, equipment for each type of industry they can be divided into different functional processes device. Here's to the film industry for example:
Vacuum coating equipment can be divided into vacuum magnetron sputtering equipment, vacuum evaporation coating equipment, vacuum ion plating equipment, vacuum physical vapor deposition equipment, vacuum optical coating equipment. Each device because of the use of technology and technology is different so there are differences, but also because of different products require different types of processes.
Vacuum measuring instruments
Vacuum measuring instruments include vacuum pressure tester, flow meter, vacuum leak. Vacuum pressure tester called the vacuum gauge (resistive vacuum gauge, compound vacuum gauge, thermocouple vacuum gauge, etc.); vacuum leak leak sparks, halogen leak detector, helium leak detectors, etc; flow meter there rotameter, dropper flowmeter, mass flowmeter.
Vacuum Accessories
Vacuum fittings are connected to each vacuum equipment components ties, commonly used vacuum accessories vacuum valves, vacuum line fittings, vacuum pump oil.

2016年8月22日星期一

Vacuum coating technology

Vacuum coating technology is a new technology developed in recent years. The principle of it is solid metal (such as aluminum, etc.) in the condition of high vacuum heat gasification, then to molecules or atoms form sedimentary in the substrate surface, thus forming a thin layer of metal film on the surface of the plating. Due to the metal after gasification evenly distributed in the coating machine cavity in the body, so, usually, the formation of the metal film on the surface of the plating is very uniform.
The development of vacuum coating technology and vacuum coating of oil development success is inseparable. In a sense, we can say, even without vacuum coating of oil, there is no vacuum coating. This is decided by the effect of vacuum coating of oil. In the process of vacuum coating, coating of oil to play the role of a strong bonding pieces and metal film plated (i.e., as the plating pieces of floor coating); After vacuum coating, should be coated with a layer of oil coating on the surface of the plating, then the oil and protect the metal film and dyeing effect (i.e., as a plating coating). Most of the material before a coating, must be coated with a thin layer of oil coating on the surface of the plating, thoroughly dry again after coating, otherwise, the plating on the metal film off, with the hand gently wipe away. In the process of vacuum coating, coating quality depends greatly on the quality of the coating.
Compared with the traditional method of plating, vacuum coating technology has many advantages, such as adornment effect is good, strong metal feeling, the cost is low (about 1/3 to 1/2 of traditional electroplating), low pollution, easy operation, etc. Especially on the application of nonmetallic objects, has incomparable advantage over traditional electroplating. In view of this, vacuum coating has been widely used in all kinds of plastic, ceramic, glass, wax, wood products, such as surface metallization.

2016年8月15日星期一

Vacuum Metallurgy Development Direction

1.Certain specific process of metallurgical which is suitable vacuum metallurgy technology can be used in place of vacuum metallurgy technology.

2.Development of a new vacuum metallurgical equipment.
3.The new method,new equipment and new processes of vacuum metallurgy certain materials research.
4. Vacuum metallurgical development of new materials.
5 .There exists a vacuum smelting slag under conditions (including remelting) technology development
6. Reseaching new special smelting technology or Development of widing the same specialty applications technology .
7. Numerical simulation and computer control of special metallurgical smelting process and quality control.
8. Production of zero inclusions ultrapure superalloys and specialty steel.

A.Mitchell put forward the concept of zero production of stainless steel and high-temperature alloy inclusions, not only theoretically demonstrated obtain zero inclusion of stainless steel, and believed that if you can avoid the original stainless steel ultrapure metals into CaO or CaO-containing inclusions and high-temperature alloys.

2016年8月9日星期二

Vacuum coating and coating technology development and application of explanation

PVD (physical vapor deposition) technology in the late 1970s, began to use in improving the mechanical properties of a hard film, the film is produced with high hardness, low friction coefficient, good wear resistance and chemical stability and other advantages. Initially successful application in the field of high-speed steel cutting tools tool manufacturing caused the world's attention, the people in the development of high performance, high reliability, coating equipment, also carbide, ceramic knives in a more in-depth coatings applied research. PVD process has no adverse impact on the environment, in line with the development of modern green manufacturing.

Titanium treatment process temperature can be controlled below 150 ~ 500 ℃, so the process can be used for coating titanium substrate of a variety of materials, not only has colorful decorative effect, even more important is the use of PVD technology allows coating has excellent the physical and chemical properties, physical properties greatly enhanced surface hardness, friction coefficient and other indicators such as the matrix.

2016年8月3日星期三

The vacuum knowledge(3)

Third, the main factors affecting the level of vacuum insulation

Vacuum insulation is a very complex physical process and the mechanism is so far no clear conclusion. From a practical point of view, mainly in the following aspects:

1, the geometry of the electrodes

Geometry of the electrodes has a great influence on the distribution of the electric field, are often not appropriate due to the geometry, causing localized excessive concentration of the electric field caused by the breakdown, which is particularly prominent in the high voltage vacuum products.

Radius of curvature of the edges of the electrodes is an important factor. In general, large radius of curvature the capacity electrode is smaller than the breakdown voltage of the large radius of curvature.

In addition, the breakdown voltage is also inversely proportional to the electrode area, and that with the increase of the electrode area is reduced. The main area is increased resulting in a reduced withstand voltage because the discharge probability increases.

2, the gap distance

Vacuum breakdown voltage and the gap distance has a relatively clear relationship. Tests showed that when the gap distance is small (≤5mm), the breakdown voltage of the gap distance increases linearly increase, but with the further increase in the gap distance, the breakdown voltage of the slowdown, i.e. vacuum gap breakdown electric field strength increases gap distance decreases. When the gap reached a certain length (≥20mm), increasing the gap distance alone raise the pressure level has been very difficult, but this time using more favorable than single fracture fracture.

Generally believed that electrical short gap breakdown under field emission is mainly caused by the long gap between the lower and the electrical breakdown of the particle effects are mainly due.

3, the electrode material

Vacuum switches operate in a high vacuum over 10-2Pa, because this time is very rare gas molecules, gas molecules collide against the free breakdown has no effect, so the breakdown voltage and electrode materials exhibit a strong correlation.

Breakdown voltage of the vacuum gap varies with different electrode materials, the researchers found that the breakdown voltage and the hardness and mechanical strength of the material. In general, the hardness and high mechanical strength material, tend to have a higher dielectric strength. For example, steel electrodes hardness after quenching, before hardening than the breakdown voltage can be increased by 80%.

In addition, the breakdown voltage and also a cathode material physical constants such as melting point, specific heat and density are related, i.e., a material whose melting point higher breakdown voltage is higher. Specific heat and density in terms versa. The essence of the problem is in the same action of thermal energy, the greater the probability of occurrence of the molten material, the lower the breakdown voltage.

4, the degree of vacuum

Figure 1 shows the relationship between the breakdown voltage and the gas pressure in the gap between. Can be seen from FIG vacuum higher than 10-2Pa (10-4 Torr), the breakdown voltage is substantially longer with decreasing gas pressure increases, the gas molecules collide because the phenomenon is no longer free to function. When the gas pressure is gradually increased from l0-2Pa (vacuum reduction), the breakdown strength is gradually decreased, while close to 1 Torr (approximately 102Pa) minimum, and later with increased pressure and increased. As can be seen from the curve when the degree of vacuum higher than 10-2Pa its compressive strength is substantially unchanged. This indicates that the degree of vacuum interrupter when 10-2Pa more fully able to meet the needs of normal use.

5, the electrode surface condition

Condition of the electrode surface breakdown voltage greater impact on the vacuum gap. Oxide electrode surface, impurities and metal particles will cause the breakdown voltage of the vacuum gap decreased.

In addition, regardless of the electrode surface in a vacuum interrupter manufacturing process was how large current breaking will involve electrode surface becomes uneven, which will also make the breakdown voltage decreases.

6. Aging effect

Aging electrode voltage and current Burn Burn two kinds.

When a new test vacuum gap, the breakdown voltage tends to lower the first few times. With the increase of the number of trials of the breakdown voltage is gradually increased, eventually stabilize at a certain value. This breakdown voltage with frequency increasing breakdown voltage phenomenon is the role of the old mill.

Aging is the voltage on the electrode surface by microscopic projections discharge elimination of impurities and defects. So that a small current through the discharge point of the surface of microscopic projections seizure, evaporation, smooth surface of the electrode, a local electric field enhancement effect is reduced, improving the breakdown voltage. Aging purification effect on the electrode surface is also very important. Since the electron emission electrode surface prone to lower the work function of the place where the impurities, also makes the discharge breakdown melting and volatile impurities, can also increase the breakdown voltage of the gap. Aging process, if at the same time the vacuum pump pumping, the evaporating gaseous substance pumped, the better. Aging voltage only suitable for use in a vacuum gap breakdown voltage increase, the vacuum interrupter contacts gap breakdown voltage increase will not have much effect. Arc on the contact surface of the burning effect will make the voltage experienced all fail.

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