Silicone rubber mold
AssigneeInternational Harvester Company
InventorLeo J. Windecker
Life of this patent
Estimating the term…
Abstract
A reinforced silicone rubber mold composite is formed by bonding a silicone mold member to a rigid laminated member. The silicone rubber mold member is cast to conform to a desired pattern and its back surface is bonded to a flexible open-celled foam by means of a layer of the silicone rubber being impregnated into a layer of open cells of the foam which are adjacent to the back surface of the silicone rubber mold member. The laminated member consists of the flexible open-celled foam having the layer of open cells impregnated by the silicone rubber and the remaining open cells impregnated by a cured epoxy resin.
Claims8
A reinforced silicone rubber mold comprising a silicone rubber mold member having a mold surface conforming to the desired pattern and a rigid laminated member, said laminated member including a flexible open-celled foam having one surface bonded to the back surface of said silicone rubber mold member by a layer of silicone rubber impregnated into the layer of open cells of said foam that are adjacent to said one surface, and a layer of cured resin impregnated into the remainder of said open cells of said flexible foam.
Method of producing a reinforced silicone rubber mold comprising:
- applying a layer of a settable silicone rubber and a curing agent therefor across a surface area having a desired pattern;
- impregnating the bottom surface of an open-celled flexible foam with a small amount of settable silicone rubber and a curing agent to form a layer extending across said bottom surface;
- placing said flexible foam onto said surface area in a manner to urge said bottom surface into contact with said layer of settable silicone rubber and curing agent;
- effecting the cure of said silicone rubber layers;
- impregnating the remaining portion of said flexible form with a settable resin and a curing agent therefor, and
- effecting the cure of said resin.
Dependencies are inferred from the claim text.