Fluid-release mold and the method of manufacturing the same
AssigneeWallace Murray Corporation
InventorsRudolph A. Skriletz, Virgil D. Kendall
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Abstract
A fluid-releasable mold for forming shaped ware including a porous mold body comprising at least 70% alumina, up to 15% ball clay and up to 15% talc is disclosed. A mold face is formed on one surface of the mold body and fluid-permeable conduit is provided in communication with a second surface of the mold body with means for sealing the fluid-permeable conduit to the second mold body surface to prevent the escape of fluid from the conduit other than through the mold body and out the mold face. The arrangement obviates the problem of gradual loss of porosity which has heretofore limited the service life of fluid-release molds of alumina, ball clay, and talc.
Claims28
A method of manufacturing a fluid-release mold comprising the steps of:
- providing a preformed, porous mold body made from an alumina containing ceramic material fired to a point short of the theoretical density for said material;
- said preformed mold body having a mold face formed on a first exterior surface therof;
- disposing a flexible, tubular, fluid-permeable conduit externally on a second exterior surface of said preformed mold body such that the externally disposed conduit has a first wall portion contiguous with said second exterior surface and a non-contiguous second wall portion free of contact with said preformed mold body;
- said contiguous first wall portion of the fluid-permeable conduit being in fluid communication substantially continuously along the entire length thereof with said second exterior surface of the preformed mold body, whereby fluid from said flexible conduit may pass therefrom into the porous mold body, and
- covering said non-contiguous second wall portion of the fluid-permeable conduit and sealing the conduit to the mold body with a fluid-impermeable, adhesive, resinous material whereby the conduit is secured to the mold body and egress of fluid from said conduit is prevented except through the mold body.
A fluid-release mold comprising:
- a preformed, porous mold body, made from an alumina containing ceramic material fired to a point short of the theoretical density for said material;
- said preformed mold body having a mold face formed on a first exterior surface thereof;
- a flexible, tubular, fluid-permeable conduit externally disposed on a second exterior surface of said preformed mold body;
- said externally disposed conduit having a first wall portion contiguous with said second exterior surface of said preformed mold body and a non-contiguous second wall portion free of contact with said preformed mold body;
- said contiguous first wall portion being in fluid communication substantially continuously along the entire length thereof with said second exterior surface of said preformed mold body, whereby fluid from said fluid-permeable conduit may pass therefrom into the preformed, porous mold body, and
- a fluid-impermeable, adhesive, resinous material covering the non-contiguous second wall portion of said fluid-permeable conduit and sealing the conduit to the mold body, whereby the conduit is secured to the mold body and egress of fluid from said conduit is prevented except through the mold body.
Dependencies are inferred from the claim text.