Optical disk molding apparatus equipped with liquid sealing means

An optical disk molding apparatus, comprising:

• a fixed side mold assembly and a movable side mold assembly, each of said mold assemblies having a mounting plate and a corresponding disk cavity plate;
• a first and a second temperature control liquid passage, each having an inner and an outer circumference, said first temperature control liquid passage being provided in said fixed side mold assembly, and said second temperature control liquid passage being provided in said movable side mold assembly;
• a first and a second temperature control liquid sealing means, each of said temperature control liquid sealing means having at least one annular aperture, which has an inner wall surface and is formed between said mounting plate and said disk cavity plate around at least one of the inner and the outer circumferences of said temperature control liquid passage in each of said fixed side mold assembly and said movable side mold assembly, a rigid ring having an outer circumference and fitted in said at least one annular aperture such that there is a minute clearance between the inner wall surface of said at least one annular aperture and said rigid ring, and a heat resistant sealing filler charged between the inner wall of said at least one annular aperture and the outer circumference of said rigid ring.