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    • 5. 发明授权
    • Apparatus for molding rubber
    • 成型用橡胶制品
    • US3852005A
    • 1974-12-03
    • US38241473
    • 1973-07-25
    • UNIROYAL INC
    • SCULATI MGAYNOR J
    • B29C45/16B29D35/00B29D35/08B29C9/00B29F1/12B29H3/14B29H7/08
    • B29D35/0036A43B1/0027B29C45/1635B29D35/0045B29D35/0081B29D35/009B29D35/081B29D35/085B29K2021/00
    • A method and apparatus for molding a rubber article from rubbers of two colors. Unvulcanized rubber is placed in a mold cavity. A movable mold member is advanced to spread and compress the rubber which is held in its spread condition until it is vulcanized. The movable member is provided with a peripheral outwardly extending lip for forming, in the rubber flash escaping around the periphery of the mold member, a peripherally extending weakened region. A peripherally extending recess region is also provided adjacent the lip for forming the flash rubber escaping past the lip into the base. After the first rubber has partially set and become vulcanized, the movable mold member is retracted away from the partially set rubber entrained therewith the bead formed in the recessed region thereof and thus tearing the rubber flash along the weakened region. The retraction of the movable mold member continues sufficient to expose a compressed gas inlet through which compressed gas is introduced to blow out through a gas outlet any particles of rubber which were formed during the severing of the rubber flash along the weakened region. After the mold cavity has been so cleaned, a second rubber is introduced into the mold cavity and the movable mold member is moved to spread the second injected rubber and to press it up against the partially set first injected rubber.
    • 一种用于从两种颜色的橡胶成型橡胶制品的方法和装置。 将未硫化橡胶放置在模腔中。 推动可移动的模具构件以展开和压缩保持在其展开状态的橡胶,直到其被硫化。