Verfahren zur Herstellung einer Förderschnecke zur Anwendung in der Kunststoffindustrie.

摘要

Preparation of feed screw having a wear resistant alloy coating thereon for the injection molding or extrusion of plastic. Nickel-based alloys that have shown themselves to be compatible with inlaid barrel liners by virtue of similar wear ratios, modulus of elasticity, ultimate yield strength, and linear thermal coefficients of expansion, are sprayed at high velocity onto a heated feed screw to mechanically bond the alloy to the feed screw. The alloy is then fused to the feed screw in a controlled manner creating a considerably more dense and more amorphous structure that offers a longer lasting and more wear resistant metallurgically bonded coating between the substrate and the alloy. Following the fusing process, the feed screw and alloy thereon is heated and alloved to cool in a highly controlled environment to produce a crack-free dense coating of the alloy on the screw substrate.