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PVD (Physical Vapor Deposition) and CVD (Chemical Vapor Deposition) are two major thin-film coating technologies. PVD vaporizes materials through physical means (e.g., heating or sputtering), resulting in strong adhesion but slower deposition rates. CVD forms coatings via chemical reactions, off
As a new polishing process, plasma polishing is a trend in stainless steel polishing. If we can make good use of plasma polishing will save us a lot of time and costs.
PVD and CVD are the most commonly used surface treatment methods for tools and moulds, CVD is based on chemical vapour deposition and PVD is based on physical vapour deposition, as they differ in principle, the final coating results are different and each has its own focus in application.
Electrolytic polishing has great advantages over traditional polishing, low cost, small footprint, can polish complex workpieces, has unmatched advantages over traditional polishing.
PVD stands for Physical Vapour Deposition. PVD coating refers to a thin film deposition technique whereby solid materials are sputtered or evaporated in a vacuum environment and deposited as pure materials or alloy components to form a coating on a substrate.
Views: 33 Author: Site Editor Publish Time: 2022-06-08 Origin: Site
PVD coating technology, suitable for injection moulding, hardware, die-casting moulds, parts and cutting tools, has anti-wear and high temperature resistance characteristics, the service life can be increased by 2-10 times, can significantly improve production efficiency and reduce production costs. At present, there are still many mould companies who lack understanding of this technology.
PVD coating in plastic moulds
The durability of plastic moulds is of greater concern due to their high requirements. For example, the plastic produced has glass fibres in it, which tend to wear the mould surface, or the need for improved lubrication during demoulding. PVD coatings, with their unique lubricity and high hardness, can greatly improve these problems. Due to its unique lubricity and high hardness, PVD coatings can greatly improve the above problems encountered in the production process.
1. Beryllium copper moulds
Beryllium copper is characterised by its fast heat dissipation and hardness of 36-42 HRC after hardening. The fast heat dissipation (3 times faster than steel) means that the injection moulding production cycle time can be shortened and the output is higher. Beryllium copper is expensive, more expensive than normal plastic steel, so any wear, scrap or resharpening costs are high. Due to the low hardness, surface wear is a more serious problem.
Considering the hardness and the characteristics of beryllium copper, the coating company has specially designed a perfect PVD coating solution for beryllium copper moulds TiN- BeCu, which improves the wear resistance of the beryllium copper surface, without reducing its high thermal conductivity.
2. Precision moulds
CrNC is the best choice for plastic moulds as some materials are tempered at low temperature and some parts have a deformation-prone shape and structure, therefore, the PVD coating solution with high temperature treatment is not suitable.
The precision mould inserts are characterised by small tolerances and deep grooves, and it is not easy to achieve no deformation and a balanced coating. The coating company knows the application of plastic moulds like the back of its hand and applies CrNC coating to solve the problem of mould wear for its customers.
3. High-speed multi-cavity mass production moulds
Clear plastic bottles are typical of high speed multi-cavity mass production moulds, which have particularly high surface requirements for high speed production, such as high surface hardness, polishing to a mirror finish and good release ability. Generally European and American manufacturers are happy to use Mirror-Gold PVD coatings to enhance the hardness of the mould surface and improve the lubrication and release capability. Due to the high hardness and good lubricating properties of the PVD coating, the production cycle time can be shortened and the output increased.
4. High wear modulus with glass fibre
Today's car manufacturers are looking for ways to reduce the total weight of their vehicles without compromising on safety and quality, thereby saving fuel. Engineering plastics are light and strong, making them a good material for automotive components. However, when it comes to the production of engineering plastics such as nylon with glass fibre, the surface wear is particularly severe, regardless of the type of mould steel.
In order to extend the service life, European and American car manufacturers are generally willing to use PVD coating. A large manufacturer of moulds and products for automotive parts in Wuxi, knowing the benefits of PVD coating, has adopted PVD coating for all its moulds for nylon automotive parts, thus increasing the service life of the moulds.
