| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that an injected rubber flows back due to heating expansion, etc. and leaks out, and its leaked part makes a difficulty in the next injection molding. SOLUTION: In this injection-molding method of the rubber product 16, a frame member 24 having an injection pathway 26 is mold-clamped to be press-welded to a mold 10 having a molding cavity 18, a plasticized rubber is injected, in a mold-clamped state, from an injection nozzle 28 into the molding cavity 18 through the injection pathway 26 and a runner 20, the injection nozzle 28 is then drawn back and thereafter a vulcanization treatment is carried out in the mold-clamped state. In this method, the injection pathway 26 of the frame member 24 is formed to have a size corresponding to a tip of the injection nozzle 28, and the rubber is injected from the injection nozzle 28 into the injection pathway 26 by putting, in injecting the rubber, the tip of the injection nozzle 28 into the injection pathway 26 . COPYRIGHT: (C)2004,JPO |
