B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 17/00 (2006.01) B22D 17/12 (2006.01) B22D 18/02 (2006.01)
Patent
CA 2106075
Abstract Process for casting metals and a device to effect such a process The invention relates to a process for casting metals, in particular alloys of low melting point, during which process the liquid metal is filled from the bottom to the top into a casting mould (3) by way of a casting runner (4) and a filling hole (5), arranged at the lowest point of a casting mould (3), and a device to effect this process. The direct further use of the casting (7), by avoiding a sprue to be subsequently processed, is possible due to the fact that after totally filling the casting mould (3) and only partial solidification of the metal in the casting mould (3), the casting pressure is decreased or turned off, so that the liquid metal flows back out of the casting mould only over a return flow channel (13), whose cross section is significantly smaller than the cross section of the casting runner (4), and that a ram, whose face (20) corresponds in size and shape to the outer contour of the casting (7) in the region of the filling hole (5), is pushed at least over the last segment (16) of the casting runner (4), displacing the liquid metal, present in the last segment, into the casting mould (3) as far in the direction of the mould interior until the face (20) of the ram (18) aligns with the inner contour of the casting mould (3). 12
Srostlik Peter
Walter Alfred
Bachmann Giesserei Und Formenbau Gmbh & Co. Kg
Fetherstonhaugh & Co.
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