| 摘要 |
PROBLEM TO BE SOLVED: To simplify a structure of an injection mold used in the case of molding, for example, a catch basin or the like. SOLUTION: The inner mold drawing mechanism slidably supports a slide board 18 and a leading board 19 coupled to one another in a slide frame 23, slidably interposes a driving board 20 between the boards 18 and 19, communicates the board 18 with a receiving port inner mold 11A for molding an inside shape of a receiving port to be molded, communicates a radially enlarging or contracting guide 14 for radially enlarging or contracting a packing groove molding enlarging or contracting core 12 charged in the mold 11A with the board 20, slides a radially enlarging or contracting guide 14 in a direction for radially enlarging or contracting the core 12 via the board 20 by a driving means 28, forwards the board 19 to the board 20 to integrally slide the board 18, draws the mold 11A from the molded port to draw the radially enlarging or contracting diameter of the core 12 and the mold 11A to draw the radially enlarging or contracting diameter of the core 12 and the mold 11A by one drive source. |
