Preform machine

Details Preform machine Preform machine

B - Operations, Transporting

29

D

18/931, 18/955

B29D 22/00 (2006.01)

Patent

CA 1102077

PREFORM MACHINE ABSTRACT OF THE DISCLOSURE A method and apparatus for forming a fiber preform for use in molding fiber-reinforced, plastic articles is dis- closed. 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.

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