Casting of metal objects

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

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164125, 164126, 164130, 164136, B22C 908, B22D 1500, B22D 2704, B22D 3000

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active

054779065

ABSTRACT:
A mould assembly comprising mould segments of generally non-thermally conductive material which define a mould cavity is upwardly filled with liquid metal through at least one in-gate. A thermal extraction member of a high thermally conductive material contacts a portion of the mould cavity through which heat is extracted rapidly to establish positive thermal gradients in the casting and thereby promote directional solidification. The mould assembly is also provided with a seal to selectively isolate the mould assembly from the liquid metal source to allow the mould assembly to be removed from the casting station and transferred to the cooling station, providing a more efficient use of the casting station. In addition, once a shell has solidified then the mould segments and metal contained therein can be transferred to the cooling station.

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Low Pressure Sand Casting: Current Experience With a New Process, by R. A. Smith, P. S. A. Wilkins, Cosworth Research & Development Ltd. Worcester, England AFS Transactions, May 1986, pp. 785-792.
Lavington, M. H. "The Cosworth Process-a new concept in aluminium alloy casting production", in Metals and Materials, Nov. 1986, pp. 713-719.

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