Patent ID: 7694404

Claim:
An assembling method for a plastic-lens-forming casting mold comprising fitting and temporarily fixing a pair of molds in two open ends of a casting gasket integrally having a positioning projection projecting from an inner surface of the casting gasket such that lens-forming optical surfaces of the pair of molds oppose each other, clamping the casting gasket by a pair of clamping means from an axial direction, pushing one of the pair of molds into the gasket by a first push-in means to urge the mold against the projection, and pushing the other mold into the gasket by a second push-in means for a predetermined amount, wherein the pushing the other mold includes pressing a peripheral portion of a surface of the other mold which is opposite to a lens-forming optical surface by using, as the second push-in means, a plurality of pins which are biased in enlarging directions.