Patent ID: 6699410
Filing Date: 2004-03-02
Classification: B22D,B60L,C04B

Abstract:
A method for pore-filling impregnation of a porous workpiece of carbon material with an impregnating agent comprising a liquid-state metal or metal alloy which is liquid at least during the impregnation, the porous workpiece being prefabricated prior to impregnation by mixing a pulverulent or fibrous carbon material with a binder, shaping the mixture into a shaped body by compression, ramming or extrusion and subsequent heat treatment for sintering, hardening, carbonising and/or graphitisation of the workpiece, said method comprising the steps of:providing a closable mould configured to be compatible with an injection moulding press, said mould having at least one mould cavity closely adapted to the shaped body of the workpiece; arranging the workpiece in the mould cavity; closing the mould; and injecting an impregnating agent into the mould cavity under pressure by means of an injection moulding apparatus.