Patent ID: 8597018
Filing Date: 2013-12-03
Classification: B29C

Abstract:
1. A weldless injection mold apparatus, comprising: an upper mold and a lower mold engaged to the upper mold to form a cavity for injection-molding a product; a heating unit situated at a side adjacent to the cavity of at least one of the upper and lower molds and heating a resin injected into the cavity; a first cooling unit situated outside at least one of the lower and upper molds to prevent the mold from being over heated and to form a heat blocking unit to prevent heat from being transferred outside the molds; a second cooling unit installed between the heating unit and the first cooling unit and cooling an area surrounding the cavity and an injection-molded product; wherein the heating unit operates to heat the periphery of the cavity to a predetermined temperature before the upper and lower molds are engaged with each other and a resin is injected into the cavity; wherein the heating unit stops the heating operation and the second cooling unit operates to cool the periphery of the cavity and the injected resin when the injection of the resin is completed; wherein the second cooling unit stops the cooling operation after the upper and lower molds are disengaged from each other and a molded product is extracted; and wherein the first cooling unit continuously operates to cool the mold during the entire injection mold process.