THE PVD METHOD
If high quality demands are placed on the end product to be manufactured, the solid coating of machine parts for plastic processing machines provides the user with significant advantages.
The PVD method (Physical Vapour Deposition) is based on vaporisation (ACR) or atomisation (sputtering) of metal compo- nents by a fixed metal phase. The coating temperatures are below the hardness and annealing temperatures so that a change in size cannot occur and hardness losses are ruled out.
The solid layers used most frequently are CrN, CrN Mod. and TiN. Other benefits of the PVD coatings are increases in the service life due to hard surfaces, which are suitable up to max. 10 % glass fibre. The biggest advantage is the high surface density (lotus effect), which prevents plastic adhesions, burning or cracking or immediately flushes them out again.