Manufacture of plastic parts by radiation molding

Details Manufacture of plastic parts by radiation molding Manufacture of plastic parts by radiation molding

B - Operations, Transporting

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204/91.32

B01J 19/08 (2006.01) B29C 41/12 (2006.01) B29C 67/08 (2006.01) B41M 1/10 (2006.01) B41M 1/12 (2006.01) B41M 3/00 (2006.01) B29C 35/08 (2006.01)

Patent

CA 1046452

Abstract of the Disclosure Thin plastic parts which can have precise tolerances and can be of complex shape are prepared by casting a viscous radiation-curable composition onto a support, such as a moving web of polymeric material, in the shape of the desired part and then irradiating, for example with ultraviolet radiation or high energy electrons, to cause curing of the composition to a solid plastic. The radiation-curable composition is formulated with viscosity and flow characteristics which enable it to be cast in the exact shape of the part desired yet retain this shape during curing while supported only by the surface on which it has been cast. Plastic parts made by this method can be formed entirely of the radiation-curable composition by casting onto a web having a release surface from which the part can be stripped subsequent to curing or can be formed partially from a web material and partially from the radiation-curable composition by casting onto a web to which the composition will bond and subsequently cutting the web into discrete portions which in- clude the cured composition.

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