PVD coating should be treated separately for different injection moulds
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Due to the high price of plastic mold, its durability is more concerned.Especially the plastic mold because of its complex structure decided to machining is difficult, so the cost is relatively high, so improve the life of the mold is a major topic, especially the mirror and etched surface, it is particularly easy to wear, this has been a very distressed thing.For example, in the production of plastic fiber, its hardness, wear and tear of mould surface, or mold release need to improve the performance of lubrication, PVD coating because of its unique lubricity and high hardness, can greatly improve the production process of the above problems, but the specific situation and according to the use of the mould and characteristics.
1. Beryllium copper mold or insert
Beryllium copper is characterized by rapid heat dissipation hardness up to 40HRC, the general copper alloy can not be compared.Fast cooling (three times faster than alloy steel) means shorter production cycles and higher output.Beryllium copper is expensive, more than five times more expensive than ordinary plastic steel, so any wear, scrap or repair costs are high.Because the hardness cannot exceed 40HRC, the surface wear is a serious problem.
2. Precision die or insert
The current trend of consumer products such as digital cameras notebook computers mobile phones or PDA products have special functions but shape to small and exquisite direction, so this kind of products on the precision and material selection requirements are greatly improved.In terms of material selection, PC+ABS+ glass fiber materials are generally adopted based on the high protective performance of the shell and the high internal strength.And the material on the mold wear or corrosion are very high, so the mold wear faster, and the maintenance of precision mold price is also very high.
3. Nylon or mass production mold
Clear plastic bottles are typically mass-produced products.Under the condition of high-speed production, the mold has high requirements on the surface, such as high surface hardness, polishing to mirror and good demolding ability.Generally, PVD coating is adopted by European and American manufacturers to enhance the hardness of mold surface and improve the ability of lubrication and mold release.High hardness and good lubrication of PVD coating can shorten the production cycle and increase the output.Another aspect is that the automobile manufacturers need to continuously reduce the total weight of the automobile without affecting the safety and quality, so as to achieve the purpose of saving fuel.Engineering plastics are light and strong, making them a good material for "automotive" parts.But when it comes to the production of engineering plastic products such as nylon or glass fiber, no matter what type of steel mold, the surface wear is particularly serious.A major manufacturer of auto parts molds and products in wenzhou learned about the benefits of PVD coating and adopted it in all its nylon auto parts molds, thus improving the service life of the molds.