Cassette half formation manner and die null for cassette half formation

摘要

PURPOSE:To keep the surface state of a primary injection material part excellent and to obtain a product having a high quality by arranging a plurality of projected pins side by side to the corresponding core molds near the boundary of a secondary injection material part and performing primary molding and secondary molding in a state wherein a prescribed amount of the projected pins are projected into a cavity and projecting the respective projected pins at the time of opening the mold. CONSTITUTION:Since a plurality of projected pins 14 are projected at the prescribed amount and provided near to a movable mold body 13 of the face of a product on a movable retainer plate 12, cooling of the primary injection material is promoted by these projected pins 14 after primary molding and this primary injection material is sufficiently solidified. Moreover when the secondary injection material is filled, the pressure of resin being the secondary injection material is stopped by the respective projected pins 14. Thereby a colored part 2 is not slipped and moved by the secondary injection material. Accordingly even when embossing work is performed on the surface of the colored part 2, the state of the surface of the colored part 2 is excellently held. Successively when the movable retainer plate 12 is separated from a fixed retainer plate 11, the product is stuck to the movable retainer plate 12 side. Therefore the product is smoothly released from the mold by projecting the projected pins 14 from the face of the product on the movable retainer plate 12.