| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for molding by a rough mold by simplifying a driving and connecting structure between a servomotor and a plunger to secure the possibility of the incorporation thereof. SOLUTION: This apparatus for molding by a rough mold molds a parison in a rough mold 1 by driving a plunger by a servomotor 7 upper and lower and lifting the tip part of the plunger. The servomotor 7 has a freely rotatable motor body 9 having a hollow part extending in the upper and lower direction. A ball screw nut 11 is fixed to the hollow part 9a of the motor body 9, and a ball screw 13 is screwed in the ball screw nut 11. The upper end part of the ball screw 13 is connected to a base end part of the plunger, and the ball screw 13 is housed in the hollow part 9a of the motor body 9 at the time of the lowering of the plunger.
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