Silane based coating of aluminium mold

摘要

A method of preparing an aluminum mold for injection molding is provided, the method comprises the steps of providing an aluminum mold having a least one surface, subjecting the at least one surface to a gas or liquid phase silane to thereby form an anti-stiction coating, the anti-stiction coating comprising a chemically bonded monolayer of silane compounds on the at least one surface wherein the silane is a halogenated silane. The at least one surface coated with the anti-stiction coating may be configured to withstand an injection molding process at a pressure above 100 MPa. Furthermore, a mold having at least one closed cavity is provided, at least one surface of the at least one cavity being an aluminium surface coated with a silane based coating layer. The resistance of the coated aluminium mold is significantly improved by applying a silane-based coating layer.

主权项

1. A method of preparing an aluminum injection molding mold for injection molding, the method comprising the steps of:
providing an aluminum mold having a least one surface; and subjecting the at least one surface to a gas or liquid phase silane to thereby form an anti-stiction coating, the anti-stiction coating comprising a chemically bonded monolayer of silane compounds on the at least one surface, wherein the at least one surface coated with the anti-stiction coating is configured to withstand an injection molding process at a pressure above 100 MPa and wherein the silane is a halogenated silane, and wherein the step of subjecting the at least one surface to a gas or liquid phase silane comprises a molecular vapor deposition process (MVD), and H2O vapor at a pressure above 130 Pa is introduced into the MVD process.