Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – With reshaping or surface embossing of formed article
Patent
1975-12-31
1978-09-26
White, Robert F.
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
With reshaping or surface embossing of formed article
264120, 264121, 264128, B29C 506
Patent
active
041170679
ABSTRACT:
A liquid binder forming material is added to a preform mold, dispersed chopped glass fiber strand is allowed to free fall into the preform mold to build up a layer of chopped fibers wherein substantially all of the strand is horizontal but otherwise randomly oriented, and the layer of chopped strand is forced down into the resin until completely immersed therein. Preferably, thereafter, the preforms so produced are stacked into tubular magazines with separator sheets between the preforms in each magazine; and the magazines are transported first to a maturation room where the viscosity of the binder forming material is increased to above 20 million centipoise, and then to matched metal dies where the preforms are sequentially fed out of the magazine to between the dies which shape and cure the preforms.
REFERENCES:
patent: B372232 (1976-03-01), Johnson
patent: 2903389 (1959-09-01), Fujita
patent: 3328383 (1967-06-01), Roscher et al.
patent: 3442998 (1969-05-01), Wiltshire
patent: 3583679 (1971-06-01), Godley
patent: 3969460 (1976-07-01), Fremont
Charter Kenneth F.
Garrett David W.
Miller John R.
Cloutier Philip R.
Hall James R.
Overman John W.
Owens-Corning Fiberglas Corporation
White Robert F.
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