Preform machine

Details Preform machine Preform machine

1977-05-27

1978-07-18

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Air felting type shaping means

With particle liberating means

264112, 264128, 19148, B29J 500

Patent

active

041012542

ABSTRACT:
A method and apparatus for forming a fiber preform for use in molding fiber-reinforced, plastic articles is disclosed. The apparatus includes a perforated form which is rotated about its longitudinal axis while a vacuum is applied internally. Cutters deposit short lengths of fibers on the rotating form by traversing the form from one end to another, and a binder resin is sprayed onto the fibers as they are deposited. The form is cylindrical and at least a major portion of its sidewall is initially covered with a flexible bellows. As the cutters traverse the form, the bellows is collapsed ahead of the cutters to incrementally expose the perforations. An oven is provided to cure the resin while the preform remains on the form.

REFERENCES:
patent: 251759 (1882-01-01), Baglin
patent: 3170197 (1965-02-01), Brenner
patent: 3177275 (1965-04-01), Brenner
patent: 3654002 (1972-04-01), Wiltshire et al.
patent: 3674599 (1972-07-01), Wiltshire
patent: 3791783 (1974-02-01), Damon et al.

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