| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of runners for a molding by forming a preceding and a following molding die of a first, a second, a third and a fourth molding die and forming a pressing protrusion which presses and cuts a connecting part formed by the preceding molding die, on the surface of the third molding die, and further, forming an escape hole into which the cut connecting part is pushed, on the surface of the fourth molding die. SOLUTION: A preceding molding space is formed in a preceding molding die by junctioning a first and a second molding die. If a synthetic resin material is run through a runner groove, the resin material is flowed into the molding space through a gate, and the connecting part 132 is formed by a runner gate in the runner groove. Thus a preceding molding is formed in the preceding molding space. If a third and a fourth molding die 15, 69 are junctioned, a following molding space 173 is formed in a following molding die 85. In addition, a preceding molding 340 is stored in the molding space 173, the preceding runner is fixed into a fixed groove, and at the same time, a pressing protrusion 197 formed on the surface of the third molding die 15 presses, cuts the connecting part 132 for the runner, and further, pushes the connecting part 132 into an escape hole 195 formed on the surface of the fourth molding die 69. |
