
Because of their complex screw geometry, twin screws can be coated only with a highly sophisticated automatic process such as plasma powder deposition (PTA). Low blending, controlled preheating and cooling during the coating process, and the perfect metallic bond formed between the protective coating and the basic material prevent tension cracks from forming in the functional layer. Subsequent plasma nitration helps keep the Bexalit screw and the barrel wall running smoothly together.
Battenfeld Extrusionstechnik
Bad Oeynhausen, Germany
+49 5731 242-0
www.bex.battenfeld.com