Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1986-11-25
1988-03-01
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164305, 164113, 164529, 164369, 164255, 164410, B22D 2715, B22D 1708
Patent
active
047279222
ABSTRACT:
A mold and method for producing, or casting a high-melting metal article from a high-melting metal having a melting point of about 900.degree. to 1600.degree. C. includes a pair of male and female molds provided with a core part or liner part, one or both of the male and female molds formed of a ceramic, gases generated within a cavity in the solidification process of the molten metal are sucked out through the vent formed by incorporating a heat resistant, porous, gas-permeable material in which inserted detachably into the vent port of the gas vent passed through outward from the predetermined part of the cavity surfaces on the both molds of the core part and the liner part is drawn outward by a minute amount at a predetermined timing from the start of the pressurization of the interior of the mold cavity so that internal gases generated at a predetermined part of the interior of the mold cavity (at a thicker part where solidification occurs later than at other parts) are effectively discharged into the well in the auxiliary vent by the time the molten metal at the predetermined part is solidified, whereby even an article having a thicker part is molded without leaving gases in the thicker part.
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