| 摘要 |
PROBLEM TO BE SOLVED: To smoothly and surely actuate a pair of movable molds by forcibly energizing a pair of the movable molds respectively in the separating direction just after a molded article is discharged. SOLUTION: A spring 30 energizing a pair of movable molds 22 and 24 each other in the separating direction is provided. Even when the movable molds 22 and 24 are returned in the direction where they approach together again under a condition where ejector pins 28 push up a pulley 10, the movable molds 22 and 24 can not be returned by energizing force of the spring 30. I.e., as mold parts 23 and 25 of the movable molds 22 and 24 are prevented from colliding with the pins 28 pushing up the pulley 10, the mold parts 23 and 25 are prevented from being broken. In addition, even when plays are generated between angular pins 26 and angular holes 22D and 22D, as the angular pins 26 are always brought into contact with the peripheral walls of the angular holes 22D and 24D by the energizing force of the spring 30, the angular pins 26 are prevented from colliding with the angular holes 22D and 24D just before and after the movable molds 22 and 24 are slid and the angular pins 26 are prevented from being broken.
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