Manufacturing method for sealing gasket, and mold

A method for manufacturing a sealing gasket, comprising following steps:

• S1:
• preparing raw material rubber and a first component, wherein the first component comprises a substrate and an adhesive coating layer, the adhesive coating layer is attached to an upper surface of the substrate, and the material of the substrate comprises a lubricating material;
• S2:
• placing the first component in an inner chamber of a forming mold, wherein the forming mold comprises an upper mold, the upper mold is provided with a first main body surface which is arc-shaped, and at least part of the first main body surface forms at least part of an upper wall surface of the inner chamber of the forming mold;
• the forming mold further comprises a lower mold, wherein the lower mold is provided with a second main body surface which is arc-shaped, and at least part of the second main body surface forms at least part of a lower wall surface of the inner chamber of the forming mold;
• and the adhesive coating layer of the first component faces towards the upper mold of the forming mold;
• S3:
• placing the raw material rubber in the inner chamber of the forming mold;
• and
• S4:
• vulcanizing the raw material rubber placed in the inner chamber of the forming mold, such that the raw material rubber and the first component are integrated with each other, wherein
• a lower surface of the first component comprises a main body surface and a connecting surface, the connecting surface connects a corresponding side wall of a through hole at the first component, and the connecting surface is inclined.