Gordon England Surface Engineering Forum



Re: coatings for plastic injection moulds


Posted by Gordon England on February 13, 2003 at 10:52:23:

In Reply to: coatings for plastic injection moulds posted by Paulo Vilaša on February 06, 2003 at 10:49:01:

: Hello, group i'm a materials engineer starting to work in a project concerning
: the development of coating, PVD hard coatings, to be used in the injection
: moulding industry. My major concerns are coatings with very low coeficcient of
: friction to improve the release of the plastic from the mould, and i would like
: to know the most used coatings in the plastic industry.
: i think that the TiN(x) and CrN(x) are the most common types vbut if anyone
: knows another type of coating system (multilayered or nanostructured) with the
: same carachteristics and with lower friction coeficient (more or less the same
: as composite DLC coatings)?

: best regards

: Paulo Vilaca

Hi Paulo
I have not had practical experience of this but
tungsten disulphide WS2 coatings could be worth consideration, possibly over your PVD coatings. Try the link for more info:

http://www.brycoat.com/ws2feat.html

Regards Gordon


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