Ceramic tools
AssigneeCytec Industrial Materials (Derby) Limited
InventorsEbrahim Ghavam Shahidi, Thomas Joseph Corden, Clive Bennett
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Abstract
A tool for use in forming molded articles, comprising a tool body formed of a ceramic material preferably porous with a porosity of between 40% and 60% and in the form of a foam. The tool body is profiled to define the mold surface(s) of the tool. The outer surface of the tool can be sealed with epoxy sealant to provide the mold surface(s) of the tool. An elastomeric layer can be applied to the surface(s) of the tool body and a resinous material, such as a fiber reinforced material, applied to the elastomeric layer, wherein the elastomeric layer inhibits the movement of resin from the resinous layer into the porous ceramic body, and the resinous layer defines the mold surface.
Claims12
A tool for use in forming moulded articles, the tool comprising:
- a porous tool body having a porosity of 40% to 60% formed of pressed ceramic powder;
- and
- a fibre-reinforced resinous material on the tool body which provides surface(s) of the tool on which articles can be formed,
- wherein the porous tool body has a Coefficient of Thermal Expansion of less than 10 ppm/° C. and is formed by:
- blending different ceramic ingredients in powder form;
- pressing the powder in a press tool at a pressure of approximately 700,000 kg/m2 or approximately 350,000 kg/m2 to form a pressed body;
- and heating the pressed body to drive off moisture.
Dependencies are inferred from the claim text.