The PVD method

Solid coating machine parts for plastic processing machines provides the user with significant advantages when high quality demands are placed on the end product to be manufactured.
The PVD method (Physical Vapour Deposition) is based on vaporisation (ACR) or atomisation (sputtering) of metal components from 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 modified, CrN multi-layers and TiN. Other benefits of the PVD layers are increases in the service life due to hard surfaces, which are suitable up to max. 15% glass fibre rates. The biggest advantage is the high surface density (lotus flower effect), which prevents plastic adhesions, burning or cracking or immediately flushes them out again.

Characteristics

TiN
Colour: Gold
Use: Screw convyeors, RSP
Utilisation temperature: Up to 600°C
Hardness: 1800 - 2500 HV
Friction: 0,65
Layer thickness: From 1 to 6 μm

CrN
Colour: Grey
Use: Screw conveyors, RSP
Utilisation temperature: Up to 700°C
Hardness: 1800 - 2500 HV
Friction: 0,50
Layer thickness: From 1 to 6 μm


Advantages

  • No adhesions
  • Longer process cycles, infrequent cleaning
  • Improved service life
  • Increase of surface hardness
  • Reduction of surface reactions
  • Reduction of friction
  • Reduction of servicing costs

Most frequent application with: POM, PC, PMMA, PEEK, PET and PVC
The properties of many products can be optimised with PVD coatings!

TiN
Features
• Low cold welding
• Strong toughness

Applications:
• Plastic processing
(PE, PP, PMMA,POM)
CrN
Merkmale
• geringe Kaltverschweißung
• hohe Zähigkeit

Anwendungen
• Kunststoffverarbeitung
(PE, PP, PMMA,POM)
CrN-multi-layers
Features
• Slightly improved density
• Strong toughness
• Adaptable micro-roughness

Applications:
• Plastic processing (PE, PC, PS)
CrN-modified
Features
• Slightly improved density
• Strong toughness
• Adaptable micro-roughness

Applications
• Plastic processing (PC, PMMA, PUR, ABS, PVC)
• Elastomers (EPDM, NBR, SBR, natural rubber)