METHOD AND APPARATUS FOR EXTRUSION INJECTION FORMING

摘要

Apparatus (10) for extrusion injection forming of an article in a cavity (22) of a mould using a material, the apparatus (10) comprising an extrusion head (16) able to be operatively connected to the mould (12); the extrusion head (16) comprising an inlet (36), an outlet passage (42) operatively connected to the inlet (36) and an outlet opening (44) at a end of the outlet passage (42) and remote from the inlet (36); the outlet passage (42) being of a length and cross- sectional area for passage therealong of the material such that material flow is unidirectional, and for outlet of the material through the outlet opening (42) with substantially uniform pressure over the cross-sectional area.