| 摘要 |
PURPOSE:To simplify the manufacturing process to a far greater extent and stabilize the quality of a tire flap without requiring so much man power by a method wherein a flap, which is to be installed in a space partitioned by a tire, a tube and a rim, is manufactured with an injection molding equipment. CONSTITUTION:Under the state that the mold of an injection molding equipment 20 is closed, green rubber in fluid state is injected from the injection port 21a of an injection nozzle 21 into a first passage 50. The green rubber passes through the first passage 50 and flows to sub-nozzles 50a and 50b. The fluidity of the green rubber is increased by the heat generated in the green rubber by being throttled at the tips of the sub-nozzles 50a and 50b for the injection in second passages 52 and 53 and, after that, further increased by the hat by being throttled again just before the injection to mold spaces 27 and 25, resulting in allowing to be filled in every corners without interruption. Next, high temperature fluid is charged in the jackets 23a, 24a and 25a of a vulcanizing mold block 42 and in the jackets 31a, 32a and 33 of a vulcanizing mold block 43 so as to raise the temperature of the vulcanizing mold blocks 42 and 43 in order to vulcanize and harden the green rubbers in the mold spaces 27 and 35 and to produce a product flap. |
