Pattern material composition
AssigneePrecision Metalsmiths, Inc.
InventorsRobert A. Horton, Ella M. Yaichner
Life of this patent
Estimating the term…
Abstract
For use in making investment molds by the lost pattern process, a pattern material which is machinable and has the capability of being melted out of the molds without cracking them, the material consisting basically of an ethylene-vinyl resin and at least one fatty acid ketone.
Claims7
A heat disposable pattern having the characteristics of being machinable and meltable out of investment molds, said material consisting essentially of from 0.5-30% by weight of ethylene-vinyl resin selected from the group consisting of ethylene-vinyl acetate polymers and ethylene-acrylate copolymers from 0 to about 30% by weight of at least one material selected from the class of waxes, solid fillers and resins other than an ethylene-vinyl polymer, and the balance fatty acid ketone.
A heat disposable pattern material having the characteristics of being machinable and meltable out of investment molds, said material consisting essentially of from about 5 to about 15% by weight ethylene-vinyl resin, selected from the group consisting of ethylene-vinyl acetate polymers and ethylene-acrylate copolymers from about 75 to about 95% by weight fatty acid ketone, and from 0 to about 10% by weight of at least one material selected from the class of compatible resins, waxes and combustible solid fillers.
A heat disposable pattern material having the characteristics of being machinable and meltable out of investment molds, said material consisting essentially of about 90% by weight fatty acid ketone and about 10% by weight ethylene-vinyl acetate polymer.
A heat disposable pattern material having the characteristics of being machinable and meltable out of investment molds, said material consisting essentially of about 45% by weight stearone, 45% by weight laurone and 10% by weight ethylene-vinyl acetate polymer.
Dependencies are inferred from the claim text.