| 摘要 |
PURPOSE:To control the generation of thin flashes dropped from a cull or a runner at the releasing time by providing an edge groove section having the enough depth which can be communicated with the edge of a resin path and makes it hard for molten resin to get into the resin path at the time of mold closing on the parting surface. CONSTITUTION:A cull 14 and runner recessed sections 16 working as resin paths are provided in the recesses on a parting surface 12 of a top force 10, and four runners 16 are communicated with the cull section 14, and the outer side ends of the runners 16 are communicated with cavities 18 through gate recessed sections 20. Also, edge groove sections 22 are shallower than the cull 14 and the runners 16 are provided in the recessed form on the edge sections of the cull 14 and the runners 16 having the depth into which molten resin hardly gets in and the strength that the resin solidified in the edge groove sections 22 is not separated nor dropped at the releasing time. Dropping of flashes can be controlled by said arrangement, and also molding of defective products because of the dropping of flashes can be controlled. |
