PROCESS FOR PREPARATION OF SUPPORT TOOLING FOR EXTRUSION DIES

摘要

The process for preparation of support tooling for extrusion dies leads to substantial reduction in machining by utilizing a precision full mould casting method in which a destructible pattern is adjusted for shrinkage and provided with a die orifice opening staged up in size to suit the particular support role of the tooling as in a backer or bolster. This is significant because such support elements are regarded as one-of-a-kind structures. Finished machining and treatment requires minimal time and at substantial energy reduction. The pattern is prepared from a destructible or vapourizable plastics material replaced by the molten metal conforming to the mould configuration.