Patent ID: 7303381

Claim:
An optical disc manufacturing device for simultaneously molding a plurality of disc substrates, comprising: a fixed platen; a plurality of fixed molds mounted parallel to each other on the fixed platen; a movable platen; movable molds mounted parallel to each other on the movable platen, wherein the movable molds move in their axial direction and fit the respective fixed molds to mold optical discs in cavities formed therebetween; a temperature controlling flow passage(s) provided in the fixed platen at a location in the vicinity of and along a boundary between each of the fixed molds and/or in the movable platen at a location in the vicinity of a boundary between each of the movable molds; and a supplementary temperature controlling flow passage(s) formed in at least one of the fixed platen or the movable platen independently of the temperature controlling flow passage(s) with regard to fluid mixing, said supplementary temperature controlling flow passage(s) being formed substantially or nearly perpendicular to the temperature controlling flow passage(s) at a location other than the boundary between each of the fixed molds or between each of the movable molds and intercepting with the temperature controlling flow passage(s) as viewed in the axial direction of the molds.