APPARATUS FOR CONTINUOUSLY MOLDING SHEET MATERIAL

摘要

Apparatus is disclosed for producing molded sheet material. An endless belt-type mold is entrained over rolls, providing an upper run and a catenary. Molten thermoplastic material is extruded onto the upper run and caused to assume the configuration of the belt mold by the action of vacuum applied from beneath the belt before the molten material solidifies. The molded sheet material is stripped from the belt mold near the end of the upper run, and apparatus is provided fro efficiently cooling the catenary of the belt mold before molten material is applied again.