Fluid-release mold and the method of manufacturing the same
AssigneeWallace Murray Corporation
InventorsWalter H. Mills, Joseph T. Bilbrey, Sr.
Life of this patent
Estimating the term…
Abstract
A fluid-release mold is disclosed. The mold includes a preformed, porous mold body having a mold face formed on a first exterior surface and a second surface. A groove is formed in the second surface. A tape covers the groove to form a conduit between the surface of the groove and the surface of the tape facing the groove. The conduit directs pressurized release fluid to the mold. A fluid impermeable backing material is disposed over the second surface of the mold body whereby egress of the fluid from the conduit is prevented except through the mold body in a direction away from the second surface.
Claims25
A fluid-release mold comprising:
- a preformed, porous mold body having a mold face formed on a first exterior surface and a second surface;
- at least one narrow groove formed in said second surface;
- tape covering said groove and attached to said second surface to form a conduit between the surface of said groove and the surface of said tape facing said groove for directing pressurized release fluid to said mold;
- and
- a fluid-impermeable backing material disposed over said second surface of said mold body to direct the egress of fluid from said conduit through said mold body in a direction away from said second surface.
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 first exterior surface and a second opposite interior surface;
- a mold face formed on said first surface and at least one narrow fluid directing groove formed in said second surface;
- flexible tape covering said groove to form a conduit between the surface of said groove and the surface of said tape facing said groove for directing pressurized release fluid to said mold, said surface of said tape having an adhesive coating for attaching said tape to said second interior surface, said tape having a width greater than the width of said groove at the second interior surface of said mold body wherein said tape is attached to said second interior surface on both sides of said groove;
- and
- a fluid impermeable backing material secured to and disposed over substantially the entire interior surface of said mold body to direct egress of fluid said conduit through said mold body in a direction away from said second interior surface, said backing material comprising a mixture of sand and fine gravel bonded together by an epoxy resin.
A method of manufacturing a fluid-release mold comprising the steps of:
- providing a preformed, porous mold body having a first exterior surface and a second surface;
- forming a groove in said second surface;
- covering said groove with a cover material to form a conduit between the surface of said groove and said cover material for directing release fluid to said mold body;
- and
- covering said mold body with a fluid-impermeable backing material whereby egress of fluid from said conduit is prevented except through the mold body in a direction away from said second surface.
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 first exterior surface and an opposite second surface with a mold face being formed in said first surface;
- forming a groove in said second surface;
- covering said groove with flexible adhesive tape to form a conduit between the surface of said groove and said tape for directing pressurized release fluid to said mold, said tape having a width greater than the width of said groove at said second surface to attach said tape on either side of said groove;
- arranging the conduit formed by said groove and tape such that the release fluid supplied to said conduit is conveyed through the mold body to substantially the entire mold face;
- and
- covering said second surface and said tape with backing material comprised of a mixture of sand and gravel bonded together by an epoxy resin.
Dependencies are inferred from the claim text.