| 摘要 |
PROBLEM TO BE SOLVED: To mold a different hardness composite vibration insulating rubber in one process. SOLUTION: An inner fitment 2 and an outer fitment 4 are put into a mold with runners of two systems, and parting components 7 are disposed at some intervals in the vicinity of the outer fitment 4 connected with the inner fitment 2, and a low hardness rubber material is injected from a runner on the arm section side, while a high hardness rubber material is injected from a runner on the main stopper side. A low hardness arm section 6, a high hardness main stopper section 10 and peripheral rubber 22 connected with edge rubber 20 can be formed simultaneously by the arrangement, and a low hardness rubber section is integrated with a high hardness rubber section through the parting components 7. At the time, rubbers of two different kinds having different harness are separated across the parting components 7 and not mixed each other. The positions of rubber connecting sections of two different kinds having different hardness, therefore, can be determined by the parting components 7, and the composite molding of different hardness rubbers can be completed in one process by the arrangement. |
