Process for the lost-foam casting, under controlled pressure, of

Details Process for the lost-foam casting, under controlled pressure, of Process for the lost-foam casting, under controlled pressure, of

1990-10-09

1992-02-18

Seidel, Richard K.

Metal founding

Process

Shaping a forming surface

164 35, 164120, B22C 902, B22C 904, B22D 2709

Patent

active

050885448

ABSTRACT:
An improvement to the process for the lost-foam casting of metal articles. According to the process, the casting takes place under a controlled pressure which initially increases at a rate between 0.003 and 0.3 MPa for a first period of at most 5 seconds from the begining of the rise in pressure. The pressure then increases during a second period at a rate higher than the rate of increase during the first period, until the maximum desired pressure is attained.

REFERENCES:
patent: 3420291 (1969-01-01), Chandley

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