DEVICE AND METHOD FOR PRODUCING PHYSICALLY DRIVEN STRUCTURAL FOAM IN THE INJECTION MOLDING PROCESS USING DYNAMIC MIXING ELEMENTS

摘要

The assembly to produce shaped foamed bodies, by injection molding, uses a physical foaming agent. The injection molding machine has at least one injection cylinder (2) with at least one screw piston (1). The piston extends through a feed zone (4), a compression zone (5) and a metering zone (6). The foaming agent is fed into a point near the metering zone into single and locally defined zones. The assembly to produce shaped foamed bodies, by injection molding, uses a physical foaming agent. The injection molding machine has at least one injection cylinder (2) with at least one screw piston (1). The piston extends through a feed zone (4), a compression zone (5) and a metering zone (6). The foaming agent is fed into a point near the metering zone into single and locally defined zones. The diameter of the screw piston is reduced at the end (8) of the metering zone. The system uses porous or permeable mixing units (9) of sintered metal or ceramic materials. The mixer has a structured section to take a sealing O-ring.