| 摘要 |
PROBLEM TO BE SOLVED: To prevent a sink from being generated on the surface of a thick-walled resin molded product when the product is molded. SOLUTION: A secondary pressure applying device 150 is arranged to a mold 130, and before a molten resin 140 injected from an injection head 13 of an injection device 170 is charged in a cavity 11 through a sprue 15, a runner 16 and a gate 17 is solidified, a rod 12a of a hydraulic cylinder12 constituting the secondary pressure applying device 150 is advanced and a compression core 23 fitted to an edge on a side opposite to the gate 17 in the runner 16 is pushed into the side of the cavity 11 to push the molten resin 140 stagnated in the runner 16 and the gate 17 in a non-solidified state in the cavity 11 to replenish the cavity 11 with the molten resin 140 by a reduction volume of the molten resin 140. COPYRIGHT: (C)2008,JPO&INPIT |
