MOLD FOR MOLDING MACHINE HAVING PLURALITY OF PROJECTIONS

摘要

PURPOSE: To provide a mold for a molding machine enhancing the uniformity of a molten resin material to eliminate a line mark for the first time by providing a plurality of projections to the outer wall part of an inner die and/or the inner wall part of an outer die and applying pressure and turblent flow to the molten resin material by the projections. CONSTITUTION: In a molding machine molding a molten resin material into a product having a desired shape such as a hollow product, a coated product, a cylindrical product, a film or sheet, a plurality of projections are provided to the outer wall part of the inner die 3 and/or the inner wall part of the outer die 4 between a spider 2 and a die lip 5 in the resin passage having the spider 2. In a resin passage having a crosshead, a plurality of projections are provided to the outer wall part of the inner die 3 and/or the inner wall part of the outer die 4 between the crosshead and the die lip 5.