The design and development of a hydrostatic extrusion machine

Abstract

The paper describes the design and development of an inexpensive hydrostatic extrusion machine having a maximum design pressure of 40 ton/in 2. The high pressure container is of autofrettaged monobloc construction with two intersecting bores. The cross-bore arrangement leads to a machine that is simple and quick to operate, and the severe stick/slip phenomenon which often occurs in laboratory equipment has been eliminated. A direct comparison is made between the hydrostatic and conventional extrusion of annealed copper.