At present, the coating technology for the plastic parts of the lamp is generally performed by evaporation plating and magnetron sputtering, but the most used one is evaporation plating. The improvement of living standards, the popularity of automobiles, the increasing production technology of auto parts, and the coating technology of plastic parts for lamps are no exception. At present, the technology of coating plastic parts for lamps is generally carried out by evaporation and magnetron sputtering, but Most of them are evaporative plating, because most of the plastic parts of the lamp need only be coated with a layer of aluminum film. Aluminum is a kind of metal with lower melting point. The melting point of the plastic used in the lamp is higher than that of aluminum. In addition, the vacuum evaporation coating machine The input cost is relatively low, and the aluminized film is completely no problem. Dongguan Huicheng Vacuum Technology Co., Ltd. specially designed the vacuum coating machine for the lamp, which is made by the principle of evaporation plating.
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For the incoming plastic parts of the lamp, pay attention to the drying, because the plastic parts themselves contain more water, so the drying time is particularly long, usually three to five hours, and the drying temperature can not be too high, only It can be 50 to 60 ° C, otherwise the long-term high temperature can easily deform the plastic even if it does not melt. Since the plastic parts of the lamp are used for vacuum coating, the contact of the oil will be avoided as much as possible during the injection molding process, and only the wipe will be clean. For those with more oil, the grease can be removed by cleaning and degreasing. Then, the dust is removed from the plastic parts by the vacuum cleaner. Plastics generally have a rough surface. In order to smooth the surface, it is first primed and then baked at a temperature of 60 to 70 ° C for 1.5 to 2.5 hours. Vacuuming to 1 to 2x10-2Pa with a vacuum pump, the aluminum metal is evaporated by heating with tungsten wire, and deposited on the surface of the plastic part of the lamp with the evaporation flow, and after cooling, the film can be baked. In order to avoid chemical reaction between the aluminum film and the air, the surface of the film is coated with a lacquer and finally cured, so that the coating of the plastic parts of the entire lamp is completed.
The reflection of light by the lamp made of plastic is very poor. After the coating, the reflection of the aluminum film makes the lamp play an important role. From Huicheng vacuum coating equipment http://
2013-7-16
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Pipe & Sheet Cutting & Drilling Machine
Sheet Metal Fabrication,Metal Fabrication,Metal Cutter,Pipe Drilling Machine
Jinan Huaxia Machinery Equipment CO.,Ltd , http://www.cnmetalcutting.com