Mold for manufacturing gasket member

A mold used to manufacture a gasket member, comprising:

• a first mold, including:
• a circumferential groove that opens to a bottom surface of the first mold and forms a cavity;
• an injection groove that opens to the bottom surface and connects to the cavity at a first location of the circumferential groove;
• an injection hole, having a lower end opens into the injection groove and an upper end extends to a top surface of the first mold;
• an exhaust groove, that opens to the bottom surface and connect to the cavity at a second location of the circumferential groove;
• and
• an exhaust hole, having a lower end connect into the exhaust groove and an upper end extends to the top surface of the first mold;
• a second mold;
• and
• a plate-shaped substrate clamped between the first mold and the second mold, wherein an elastic material is injected and filled into the cavity forming the gasket member defined between the plate-shaped substrate and the first mold, with the gasket member fixed to a surface of the plate-shaped substrate,
• wherein the injection groove is partially provided in a circumferential direction with respect to the circumferential groove at the first location, and is provided so as to extend from an inner edge of the circumferential groove to an inner periphery side or from an outer edge of the circumferential groove to an outer periphery side, and
• the exhaust groove is partially provided in the circumferential direction with respect to the circumferential groove at the second location, and is provided so as to extend from the inner edge of the circumferential groove to the inner periphery side or from the outer edge of the circumferential groove to the outer periphery side.