Patent ID: 6126434
Filing Date: 2000-10-03
Classification: B29C

Abstract:
A horizontal injection molding apparatus for molding a disk having information bits on a surface thereof and for maintaining first and second longitudinal axes of first and second respective cylindrical disk cavity molds in alignment during separation of the molds from a position wherein the molds are clamped together, comprising:first and second base members supporting the first and second molds in positions centered about the first and second longitudinal axes, respectively;guiding rods for slidably supporting said second base member;a first cylindrical guide ring surrounding an other periphery of the first mold, said first cylindrical guide ring having an outer circumferential surface and a plurality of first grooves spaced about the outer circumferential surface of said first cylindrical guide ring at predetermined positions thereof;a second cylindrical guide ring surrounding an outer periphery of the second mold, said second cylindrical guide ring having an outer circumferential surface; anda plurality of guide blocks, each said guide block being secured to the outer circumferential surface of said second cylindrical guide ring and slidably engaging within a corresponding first groove while the first and second molds are clamped together and while the molds are separated by less than a predetermined opening distance, the engagement of said guide blocks and grooves maintaining the longitudinal axes of the first and second disk cavity molds in alignment while the molds are separated by less than the predetermined opening distance,wherein said guide blocks disengage from the grooves while the molds are separated by more than the predetermined distance, permitting offset of the longitudinal axes of the molds.