| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a mold for injection molding of a carrier for planetary gear train, which can prevent falling of the support shaft of a carrier resulting from injection molding so as to eliminate the need for a separate component (annular plate) for correcting falling of the support shaft of the carrier after injection molding. <P>SOLUTION: The flow of a molten plastic flowing in a first cavity 23 is intervened by the opening 28 of a second cavity 26 protruded cylindrically into the first cavity 23, is filled evenly in the periphery of the opening 28 of the cavity 26, and then is flowed substantially simultaneously into the second cavity 26 from the periphery of the opening 28. Thus, the flow of the molten plastic flowing from the first cavity 23 to the second cavity 26 is squeezed and aligned by the opening 28 of the cavity 26. As a result, falling of a support shaft is suppressed in the carrier for planetary gear train injection-molded using an injection molding mold 2. <P>COPYRIGHT: (C)2012,JPO&INPIT |
