Method and mold for forming sheets having reduced surface...

Details Method and mold for forming sheets having reduced surface... Method and mold for forming sheets having reduced surface...

B - Operations, Transporting

29

C

18/1198

B29C 45/37 (2006.01) B29C 33/42 (2006.01)

Patent

CA 1108819

A METHOD AND MOLD FOR FORMING SHEETS HAVING REDUCED SURFACE IMPERFECTIONS Abstract of the Disclosure A mold for compression molding a plastic sheet from a viscous fluid provides more resistance to flow on the side of the sheet designed to be the underside than on the side of the sheet designed to be seen. This re- sistance to flow can be imparted by roughening the under- side of the mold more than the top surface of the mold. The purpose for roughening one surface of the mold more than the other is so that the plastic mass will flow faster on the smoother side of the mold and carry bubbles to the rough side of the mold via a rolling action. By this method employing textured molds, the surface of automotive panels can be made having reduced surface imperfections.

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