| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a rubber material from poor molding called release and blister resulting from vulcanizing gas which generates in each cavity when filling up each of an inside cavity of an inner cylinder side and an outside cavity of an outer cylinder side which are partitioned by the middle cylinder, with the rubber materials in a die closed state, in a molding die for integral molding of the rubber materials inserted between a middle cylinder arranged between both cylinders of the inner cylinder and the outer cylinder, and each cylinder. <P>SOLUTION: Channel cross sectional areas of injection flow channel parts 36 and 37 are set so that filling speed of the rubber materials to the outside cavity 17 may become below the filling speed of the rubber materials to the inside cavity 16 by branching a rubber injection flow channel into inside and outside injection flow channel parts 36 and 37 which lead the rubber materials to the inside and outside cavities 16 and 17, respectively, while providing an air exhaust flow channel which carries out communication to the outside cavity 17. <P>COPYRIGHT: (C)2012,JPO&INPIT |
