Abstract: A method of making precision low cost molds by applying a plurality of layers of material to a pattern. The method includes providing a pattern of the part to be formed; orienting the pattern on a surface plate in a molding dam; applying a release coating to the surfaces; applying a thin resin layer to form the mold surface; applying a layer of fiber reinforced tooling resin to the thin resin layer; applying an epoxy-dry plaster bonding layer to the tooling resin; inserting a reinforcement framework into the dam; and applying bulk casting plaster to complete the body of the mold.
Type:
Grant
Filed:
March 3, 1987
Date of Patent:
May 30, 1989
Assignee:
3D Manufacturing, Inc.
Inventors:
William A. Dehoff, Hugh T. Dehoff, Chris A. Dehoff