Investment casting method

Details Investment casting method Investment casting method

1978-08-31

1980-07-22

Baldwin, Robert D.

Metal founding

Process

Shaping a forming surface

164 35, B22C 904

Patent

active

042134951

ABSTRACT:
An improved method incorporating investment burn out at a predetermined ideal temperature. The investment encasing the wax-like model of the desired casting is placed in an oven preheated to an ideal burn out temperature. The oven is maintained at that temperature while the pressure in the oven is increased to a predetermined pressure and maintained at that pressure for a given time. Following that time, the pressure is cycled between the predetermined pressure and atmospheric pressure or below for a second predetermined time.

REFERENCES:
patent: 3403212 (1968-09-01), Sato
patent: 3610317 (1971-10-01), Benfield
patent: 3741718 (1973-06-01), Boyer et al.
patent: 3775043 (1973-11-01), Johansson et al.
patent: 4113426 (1978-09-01), Rogers

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