Decomposable passage-way forming core

Details Decomposable passage-way forming core Decomposable passage-way forming core

1974-03-05

1976-03-23

Husar, Francis S.

Metal founding

Means to shape metallic material

United particle type shaping surface

164400, 164410, B22C 910

Patent

active

039454290

ABSTRACT:
The present invention relates to a method for forming a canal when moulding a metal block, said canal being defined by a core inserted into the mould. The method involves using a core comprising a tube of powdered or granulated refractory material held together by an organic binding agent, and a rod located within the tube, coating the core with a blacking agent prior to moulding, carrying out the moulding operation and simultaneously combusting the binding agent and leading off gases through the core, and finally removing the rod and clearing away the remnants of the tube in the canal formed. The invention also provides a core suitable for use in said method.

REFERENCES:
patent: 282518 (1883-08-01), Herrick
patent: 2173955 (1939-09-01), Zahn
patent: 2991520 (1961-07-01), Dalton
metals Handbook, Vol. 5, Forging and Casting, Jan. 1971, p. 162.

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