Manufacture of foundry moulds and cores

Metal founding – Process – Shaping a forming surface

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Details

164160, B22D 1708, B22D 2300

Patent

active

040698580

ABSTRACT:
A method and apparatus for preparing sand-based foundry moulds and cores, particularly of the cold-setting type made from a sand/binder/catalyst mixture. After the introduction of the sand mixture into a mould or core box, sealing means is located over an open end of the box to enclose the mixture within the box, and suction is applied to the box. The sealing means may comprise a flexible diaphragm, which is drawn by the suction against the adjacent upper surface of the mixture to compact the mixture.

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patent: 3789907 (1974-02-01), Nakata et al.
patent: 3955266 (1976-05-01), Honami et al.
patent: 3960198 (1976-06-01), Matsuura et al.

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