Moulds for metal casting and sleeves containing filters for use

Metal founding – Process – Shaping liquid metal against a forming surface

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Details

164137, 164358, 164362, B22C 908

Patent

active

049614606

ABSTRACT:
A mould (61) for metal casting has a mould cavity (62) and a sprue (63) communicating directly with the mould cavity (62) and located in the sprue (63) a sleeve (64) of refractory material having a cellular ceramic filter (65) fixed therein. The mould, which has no running system apart from the sprue, may be a sand mould or a metal die for producing castings by gravity or low pressure diecasting. The cellular ceramic filter may be a honeycomb type of structure having cells which extend between two outer surfaces of the filter or a structure having interconnecting cells such as a ceramic foam.

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"Foundry Practice," No. 217, Apr. 1987, Foseco Int'l. Ltd.
"DYPUR--The Direct-Pouring System for Non-Ferrous Foundries" brochure, Foseco International Ltd.

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