Compression molding a charge using vacuum

Details Compression molding a charge using vacuum Compression molding a charge using vacuum

B - Operations, Transporting

29

C

18/1111

B29C 43/56 (2006.01) B29C 37/00 (2006.01) B29C 43/34 (2006.01) B29C 43/36 (2006.01)

Patent

CA 1254712

COMPRESSION MOLDING A CHARGE USING VACUUM Abstract of the Disclosure A method is disclosed for making a part with a smooth surface, such as an exterior automotive body panel, by compression molding a charge containing a curable resin. The charge is placed on the molding surface of one of the dies so that the charge covers 40% - 80% of the surface area of the molding surface. The molds are moved to a partially closed position and the mold cavity is quickly evacuated. The mold is then closed so that the dies compress the charge to cause it to fill the mold cavity and, after the resin cures, the part is removed from the mold.

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