SURFACE HARDENING PROCESS OF ALUMINIUM ALLOY MOULD FOR BOTTLE BLOWING MACHINE

摘要

A surface hardening process of an aluminium alloy mould for a bottle blowing machine comprises the following steps: polishing a surface of a cavity of an aluminium alloy mould, and putting the polished aluminium alloy mould into an oxidation tank with electrolyte, to perform hard anodizing; coating weak conducting film on a parting line at an edge of the cavity of the oxidized aluminium alloy mould; and polishing the surface of the cavity of the oxidized aluminium alloy mould again. The surface of the cavity of the aluminium alloy mould is oxidized to have a hardened layer, so that the surface of the cavity is more wear-proof and more corrosion-resistant, and the hardened layer is tightly jointed with the surface of the cavity, and therefore it is not easy for the hardened layer to fall off.