Difference between plastic overmold and two-color mold:
Overmolding (secondary molding): Two plastic materials are not necessarily injected on same injection molding machine, and are molded twice; after product is taken out from one set of molds, it is put into another set of molds for second injection molding.. Therefore, generally this kind of molding process is usually completed by two sets of molds, and no special two-color injection molding machine is needed. Mold structure is same as that of single-color injection mold. It mainly depends on adjusting injection parameters. Overmold is mainly soft rubber over hard rubber. Among them, soft rubber commonly used synthetic rubber, TPU, TPR and other rubber materials, hard rubber can be ABS, PC, PP, etc.
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