Method of making a hollow article

Details Method of making a hollow article Method of making a hollow article

1976-07-09

1978-11-21

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

156 80, 156189, 249 62, 249 65, 264137, 264220, 264314, 264316, 264317, 425DIG14, B29C 1706

Patent

active

041266595

ABSTRACT:
The invention relates to a method and apparatus for making hollow, resin-impregnated fibrous fabric articles. Specifically, it relates to a method wherein a reusable mandrel is made sufficiently rigid to receive a lay-up of the article to be manufactured. The rigidized assembly is placed within a female mold, derigidized and expanded to apply pressure from within, thereby forcing the lay-up against the interior of the mold. Heat is applied to cure the resin, producing an article having a very high degree of dimensional accuracy.

REFERENCES:
patent: 1394997 (1921-10-01), Lake
patent: 2739350 (1956-03-01), Lampman
patent: 3764641 (1973-10-01), Ash
patent: 3962393 (1976-06-01), Blad
patent: 3962394 (1976-06-01), Holl
patent: 3973749 (1976-08-01), Friedl

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