Continuous molding apparatus with cover belt

Details Continuous molding apparatus with cover belt Continuous molding apparatus with cover belt

B - Operations, Transporting

29

C

18/659

B29C 44/30 (2006.01)

Patent

CA 1131865

93US ABSTRACT OF THE DISCLOSURE Rigid synthetic foam is expanded, molded and cured in an endless tunnel formed by opposed spaced horizontal belt conveyors with side dams. To obtain a smooth finish on the product, a top cover belt and a bottom cover belt are employed to span the rigid slats of the conveyors, respectively. The top cover belt is stretched tightly and smoothly when the end- less conveyors approach each other at the entrance to the pressure tunnel, by means of a downwardly de- pending continuous wedge shaped member along each side margin of the cover belt that cooperates with an up- wardly opening correspondingly wedge shaped recess in the side dams. To obtain different thickness products, spacer blocks may be employed between the side dam and the lower conveyor.

328665

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