Abstract: Disclosed is an injection mold for washing machine diaphragms wherein the operations of an uppermost first slide core to support the upper part of a first step of a diaphragm manufactured in a cavity and a cam core to support the lower part of a second step of the manufactured diaphragm are controlled to automatically separate the manufactured diaphragm from the cavity.

Abstract: A gasket and a manufacturing method and injection mold for the same are disclosed herein, in which the gasket includes a body composed of an injection molded product made from a thermoplastic elastomer while having a hollow portion and a circumferential portion enclosing a periphery of the hollow portion, and a lip which protrudes from an edge of the circumferential portion toward the hollow portion. The gasket includes a front surface coming into contact with a door when the gasket is installed in a laundry treatment apparatus and a back surface disposed behind the front surface. The back surface of the lip may be formed with an overflow protrusion during molding of the gasket. The overflow protrusion may be molded later than the lip, thereby preventing generation of poor molding at the front surface of the lip.

Abstract: Disclosed is an injection mold for washing machine diaphragms wherein the operations of an uppermost first slide core to support the upper part of a first step of a diaphragm manufactured in a cavity and a cam core to support the lower part of a second step of the manufactured diaphragm are controlled to automatically separate the manufactured diaphragm from the cavity.