Back to results
US 4,847,026 AGranted
Method of molding an artifcial urethane rock
AssigneeFutura Coatings, Inc.
InventorsEnos D. Jarboe, Rodney D. Jarboe, Edward M. Barclay
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeFutura Coatings, Inc.
InventorsEnos D. Jarboe, Rodney D. Jarboe, Edward M. Barclay
Estimating the term…
A method for producing simulated rocks by spraying a high density polyurethane elastomer in a flexible mold. The method includes reproducing a rock in molded form, not limited in size. A flexible mold is prepared by applying numerous coats of latex rubber upon the rock exterior in combination with a fabric embedded within the rubber latex layers. A supporting cradle for the latex mold is produced by spraying a low density urethane foam composition over the latex mold. The mold and cradle are stripped from the rock and are sprayed with a two component structural urethane system employing an isocyanate component and a polyol component with appropriate catalysts fillers and additives. The structural urethane elastomer is built up to substantial thickness to provide a strong load bearing polyurethane molded rock simulating the original rock surface with curing taking place in a matter of seconds or minutes. After cooling, the molded urethane rock is removed and the mold may be reused for repeated molding operations.
A method for molding an artificial urethane rock which comprises selecting a rock to be reproduced, creating a flexible mold and supporting cradle having a mold cavity conforming to the exterior of said rock, said mold having a substantial degree of flexibility and being created by applying latex rubber to said rock, curing said latex rubber to produce said mold, said cradle being formed by applying by spraying a low density urethane foam forming mixture to the exterior of the latex rubber mold, spraying a two sided urethane compostion into the mold cavity, said urethane composition comprising an isocyanate side and a polyol side and being mixed in a spray gun in a spray-in-mold process, carrying out said spraying to build up the molded artificial urethane rock to a desired thickness and stripping said cradle and mold from the molded artificial urethane rock after curing.
Dependencies are inferred from the claim text.