The importance of coating equipment for coating thickness distribution

The importance of coating equipment for coating thickness distribution
     
Vacuum coating electromechanical always want more evenly distributed coating equipment plating thickness on the workpiece, the better the deposition. When the total amount of metal deposited on the workpiece is the same, if the thickness is uneven, it will bring a lot of disadvantages:
(1) For the anodic coating, vacuum coating equipment can not stand at the expense of a thin ...coating of corrosion will first make the matrix rust. And a part of Corroded parts already failed, resulting in a waste of the coating is too thick at the metal. If it is to ensure the thinnest not rust, can only increase the average thickness, resulting in plating cost increases.

(2) to the cathode of the coating, vacuum coating equipment thin coatings at high porosity (see Part 10), it is easy to produce rust spots, and then increase the rust to form contiguous corrosion. Compared with the anodic coatings, cathodic corrosion coating thin place faster. For local seepage nitrogen, carburizing coating, easy to form thin at the hole, lose protection. If the thickness uniformity of the various parts of the porosity is not very different, the overall increase corrosion resistance. For example, the battery bright nickel plated steel rollers, housing (particularly by bottom place) coating is thin, even when washing and drying already starting small rust spots, yellowing, this should "the white" treatment, after rapid drying of water-soluble blocking agent.
(3) For the bright plating, vacuum coating equipment thin coating at the cathode current density due to small, so light leveling poor, affect the overall appearance.
(4) alloy electrodeposition, alloy composition is not the same at different thickness, or the appearance of uneven (such as imitation gold plating), and corrosion resistance are inconsistent or (such as zinc-nickel alloy).
(5) physical coating at different thicknesses, the mechanical properties (such as brittleness, internal stress, etc.) are not the same. If you would have to be plated after stamping molding machine processing, the coating is too thick at the often poor machining performance (peel, crack, powder off, etc.).
Terms of corrosion resistance, or appearance, machining performance perspective, both want to improve the uniformity of the coating thickness of vacuum coating equipment. For the size of the hard chrome plating, if the user requires no plating after grinding treatment, it is difficult to do; sometimes in order to ensure the thinnest reach the final size requirements, thickness uniformity is poor, have greatly increased the average thickness, which is in production are not uncommon. To make each part of the coating thickness on the workpiece as close as possible, we must understand the impact of thickness uniformity factor.

Vacuum coating equipment and coated glass

Vacuum coating equipment and coated glass

Coated Glass (Reflective glass), also known as reflective glass. Coated glass is coated one or more layers of metal, alloy or metal compound film on the glass surface, to alter the optical properties of the glass, to meet certain requirements. Coated glass according to the different characteristics of the product, can be divided into the following categories: heat-reflective glass, Low-E glass, Low-E, conductive film glass.
Heat-reflective glass is usually coated on the glass surface layer or layers of thin films, such as chromium, titanium or stainless steel and other metals or compounds consisting of the product showed a rich color, appropriate for visible light transmittance, infrared has higher reflectance, the coated glass has a higher UV absorption rate, therefore, also known as solar control glass, mainly for building and glass curtain wall;
Low-E glass is coated on the glass surface of a multilayer thin-film of silver, copper or tin, or a compound consisting of a metal, the product has a high visible light transmittance, high infrared reflectivity, a good heat insulation performance, mainly used in construction and automotive, ships, and other transportation, due to poor film strength, are generally made using hollow glass; glass conductive film is a conductive film of indium tin oxide coated glass surface, etc., can be used for heating the glass defrost, defog and as liquid crystal displays..
Many coated glass production methods, the main vacuum magnetron sputtering, vacuum evaporation, chemical vapor deposition and sol - gel method. Magnetron sputter coated glass by magnetron sputtering techniques can be designed for producing a multilayer complex film system, a variety of colors can be coated on a white glass substrate, the film is preferably corrosion and wear resistance, is the production and use one of the largest product.

Optional vacuum coating machine components of

Optional vacuum coating machine components of

For vacuum coating machine, the vacuum pump their access to essential part of every manufacturer of a coating machines are manufactured with one or more pumps.

First, the choice of the vacuum pump vacuum pump vibration when you first need to pay attention to when the work produced on the process and the existence of environmental impact, if the process is affected, or alternatively, anti-vibration measures should be taken to a vacuum pump. Choose the time you need to know to be pumping gas composition, selective evacuation if needed, may be insufficient to meet the requirements of a pump, the pump must be combined with a variety of different work with each other, if coater coating requires no oil will have to use no pump.

Second, the coating machine for extreme requirements and working pressure requirements of the greater degree of vacuum, the vacuum pump for higher capacity requirements, a minimum degree of vacuum pump ultimate vacuum equipment than half the number of working vacuum level and above.

Third, each pump has a certain working pressure range, such as diffusion pump pressure of 3 ~ 10-7mmHg, its stable working pressure range of 5 * 10-4 ~ 5 * 10-6mmHg, then not allow the use of a diffusion pump in addition to its work undecided working pressure range.

Higher four, when the gas pressure of the pump is not high demand or high degree of vacuum is not required, the priority selection in a single stage pump, through the exhaust gas pressure or vacuum requirements, single pump often can not meet the requirements, the choice of two pumps or multi-stage pumps.

Fifth, one of the key pump price and maintenance costs also need to be considered.

Thermal insulation film: coated glasses will replace the solar film

Recently, A product of  "Sunblock and energy-saving car glass" is popular selling. The infrared blocking ability much better than ordinary front windshield glass about 38 percent, one hundred percent UV blocking, and infrared blocking rate as high as 75%, even "cool" effect, comparable to some of the solar film brands. But better than the solar film is that it is less susceptible to damage, the price is cheaper. Some people even claim that the future will replace the glass Solar films. Is it true?

It is understood that this principle is coated glass by vacuum magnetron sputtering and cathodic sputtering method in semi-finished clear float glass surface coated multilayer metal oxide, and then made by bending and mezzanine processing. Can be used as car-specific product, its price than ordinary windscreen floating around 1,000 yuan, the high out of the price is lower than the price of solar film paste brand.

Leading-Coating companies can help automotive glass manufacturers to provide production of the sun's energy-saving glass vacuum coating machine. It is not only reducing production costs, but also with high productivity. It is an excellent modern environmental equipment automotive glass manufacturing.

Germany has researched low emissivity coating method for architectural glass

       

   In Germany, building adopting energy-saving low-e glass coating has been a standard practice. As Germany BINE club's latest report, Germany has developed low emissivity coating again, which opened up a broader application prospect.
  The low-e glass, also called low radiation glass, which coat layers of metal or other compound film combination on the glass surface. This kind of glass can reduce the thermal radiation from the outside in the summer, thus reduce air condition usage. In winter reduced heat transfer to outdoor, achieve the ideal energy saving effect. Low-e glass is to coat metallic film layer on the inner surface of the double layer or three layers of glass, and under the good protection, light construction structure, weather proof.
   Under the German federal economic and technical support, Bavaria applied energy research center to develop polyurethane mixed aluminum pigment particles, which meet thin film of fabric coating methods, and achieve the ideal effect of low-e glass coating.

The various types of vacuum coating and working methods

   

Now according to the technical requirements for vacuum coating equipment select different standards and types of coating equipment, its type resistance evaporation, electron beam evaporation, magnetron sputtering, magnetron sputtering, ion plating, hollow cathode arc ion plating, ion plating, etc. Fixture working method of the rotation, light coating machine revolution and the revolution and rotation combination method, users can according to the substrate size and shape, put forward the corresponding requirements, changes the speed of the scale and precision: general adjustable and frequency control of motor speed, etc. By the mechanical pump and the vacuum system, distributed pump, oil pump, enlargement pump, roots pump and molecular pump crucible round and match them all kinds of pneumatic, manual, electric valves, pipes, etc. According to technical requirements selected plating method and the method, to choose a suitable coating machine, and coating mechanical type so much, and the internal gear is also there are so many kinds.
If it is not the right choice, then it will be difficult to play for the biggest effect of vacuum coating machine, and the above said tial mainly suitable for use to metal materials and surface treatment in crystalline materials. For resistance evaporation, electron beam evaporation is suitable for use to the city a kind of common items of surface treatment, and said to the fixture, light coating machine is typical of the kind.