Process and mold for producing padded seat backs

摘要

A process and mold for producing padded motor vehicle seat backs containing a metal framework (22) surrounded by polyurethane foam in a plastic coating (10, 12, 14) comprises inserting the framework through a slit in the coating which is then sealed, placing the coating in a mold, injecting the polyurethane foam (31) through a flexible filler neck into the coating and allowing it to polymerize, and removing the padded seat back from the mold. The framework (22) may be contained in a plastic bag together with a relatively resilient foamed plastic body. A suitable mold comprises a pair of lateral mold parts (32, 36) and a central mold part (34) together defining the mold cavity (40). The lateral mold parts (32, 36;) are movable toward and away from the central mold part (34;) by hydraulic or pneumatic rams.