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Mold for high-temperature molten metal and method of producing high-melting metal article

  • US 4,727,922 A
  • Filed: 11/25/1986
  • Issued: 03/01/1988
  • Est. Priority Date: 11/30/1985
  • Status: Expired due to Fees
First Claim
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1. A mold for a high-temperature molten metal, comprising:

  • a pair of male and female molds provided with a core part or liner part, one or both of said male and female molds formed of a ceramic,a main vent provided by incorporating a heat-resistant, porous, gas-permeable material into said core part or liner part,an auxiliary vent leading from a predetermined part of mold cavity surfaces of said male and female molds to the exterior of said mold,a well provided in said auxiliary vent in the vicinity of said mold cavity surfaces,a vent plug provided at the outlet of said auxiliary vent so as to be capable of being freely inserted and drawn out, said vent plug formed of a heat-resistant material,means for sucking out gases or the like, generated in a solidification process of a molten metal poured into said mold cavity, through said main vent so as to remove said gases from said mold cavity, andmeans for drawing out said vent plug at a predetermined timing from a starting time of pressurization of said mold and by a minute amount.

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