Method for molding composite, structural plastics, and objects molded thereby
First Claim
1. A method for molding composite, structural plastic objects, comprising the steps of:
- (a) mixing a liquid thermoset resin with a catalyst and a quantity of reinforcing fibers;
(b) pouring the complete mixture of said resin, said catalyst, and said fibers into a mold, said mold selected from a group of molds used alternatively to cast structural metal objects from molten metal poured therein, said molds characterized at least in that they form a desired structural object in the absence of applied pressure or heat, said mold being selected from the group consisting of sand, permanent, die-cast, wax and investment molds;
(c) allowing said complete mixture to cure into a composite, structural plastic object within said mold; and
(d) removing said composite, structural plastic object formed by said curing of said complete mixture within said mold from said mold.
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Accused Products
Abstract
A method for producing composite, structural plastic parts in traditional foundry molds, including sand, permanent, die-cast, wax and investment molds. Short fiber length fibers reinforcing low viscosity thermoset resins, and in particular resole phenolics, provides a pourable low bulk density polymer compound with minimal externally applied thermal requirements during molding and post cure when required. Foundries can consider metal parts replacement with this new method. It permits foundries to actually produce composite, structural plastic parts with superior mechanical and thermal properties. This permits them to provide plastic products on a competitive basis with the compression and injection molders.
36 Citations
11 Claims
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1. A method for molding composite, structural plastic objects, comprising the steps of:
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(a) mixing a liquid thermoset resin with a catalyst and a quantity of reinforcing fibers; (b) pouring the complete mixture of said resin, said catalyst, and said fibers into a mold, said mold selected from a group of molds used alternatively to cast structural metal objects from molten metal poured therein, said molds characterized at least in that they form a desired structural object in the absence of applied pressure or heat, said mold being selected from the group consisting of sand, permanent, die-cast, wax and investment molds; (c) allowing said complete mixture to cure into a composite, structural plastic object within said mold; and (d) removing said composite, structural plastic object formed by said curing of said complete mixture within said mold from said mold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification