Structural Foam Molding Machines 2

Union Carbide System The system developed by Union Carbide Corp., sometimes termed the low-pressure or short-shot system, uses a stationary (fixed) single-screw plasticizing extruder for producing the foamable melt in conjunction with an accumulator and a hydraulically operated injection and mold clamp unit. Union Carbide Corp. patents were held invalid about 1976 and low-pressure system …

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Structural Foam Molding Machines 1

Structural Foam Molding Machines Machines built primarily for structural foam molding were initially similar to “normal” injection machine in layout, appearance and operation, but were characterized by lighter construction than the conventional machine and therefore, on the basis of shot weight capability, were cheaper. However, a recent development is the use of counter-pressure within the …

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