The combination of an injection molding press and a twin-screw compounding extruder represents a new paradigm for processors: They create their own materials as they mold them. Although the machinery systems are expensive, they provide new opportunities for materials cost savings and flexibility to tailor formulations for individual parts. However, the molder must now take responsibility for the raw materials as well as the molded parts. And adding complexity to the process also multiplies the number of variables to control.
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