Method and apparatus for making a sheet molding compound

Details Method and apparatus for making a sheet molding compound Method and apparatus for making a sheet molding compound

B - Operations, Transporting

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B29C 53/04 (2006.01) B29B 15/12 (2006.01) B29C 63/04 (2006.01) B29C 70/50 (2006.01) B29C 70/54 (2006.01) B31F 1/00 (2006.01) B32B 3/04 (2006.01) B32B 5/02 (2006.01) C08K 7/02 (2006.01)

Patent

CA 1036918

METHOD AND APPARATUS FOR MAKING A SHEET MOLDING COMPOUND Abstract of the Disclosure A method and apparatus for making a sheet molding compound. A thickened uncured thermosetting resin mix is supplied as a thin coating to a sheet of plastic film and chopped fibers are deposited on the resin film to provide a composite laminate. The side edges of the plastic film are then folded inwardly in a double fold and the laminate is wound in coiled form. Kneading rolls having ribbed surfaces ride against the coiled laminate to provide a thorough impregnation of the resin and fibers. The sheet molding compound of the invention utilizes only a single sheet of plastic film, thereby providing a substan- tial cost saving over conventional systems using a pair of plastic films. The folded edge on the plastic film serves to confine the resin and fibers during kneading, and the second or reverse fold provides a projecting tab to facilitate removal of the plastic film at the time of use. - 0 -

191821

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