| 摘要 |
PROBLEM TO BE SOLVED: To operate an air ejector without using a solenoid valve or the like by providing a valve rod having a channel halfway of an air channel in a mold, fixing its one end to a molder ejection rod, providing a spring onto the opposed side, and providing an O-ring in a clearance between the valve rod and the mold. SOLUTION: A control part comprises a molder ejector rod 1, a valve rod 2 having a channel 8, an O-ring 3, a spring 4, an air ejector 5, and an air channel 6 of an mold. Since during molding, the molder ejector rod 1 is retracted, and an air channel of the rod is shifted from the air channel 6 of the mold, compressed air is not supplied to the air ejector 5. Further when a molded product 9 is ejected, the molder ejector rod 1 advances, the channel 8 reaches the air channel 6, compressed air is supplied to the ejector 5, and the molded product 9 is taken out from the mold 7. Thereafter, the valve rod 2 is pushed back by the spring 4. Further, compressed air is prevented from leaking by the O-ring 3.
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