| 摘要 |
PURPOSE: A dual driving apparatus of a slide core is provided to prevent a forming unit from being stuck to a slide core by installing an eject pin device. CONSTITUTION: A dual driving apparatus of a slide core is composed of a sub slide core(40), an eject pin device, and a main slide core(30). Under cut shapes which do not permit a draft are collected in the sub slide core. The sub slide core is operated before a main slide core is operated. The eject pin device is installed so that the forming unit is not stuck to the slide core. The main slide core is operated secondarily for the supply of various undercut forming units in which the draft is admitted. The dual driving operation is composed of the spring operation of a sub slide core, the primary operation due to the angle adjusting of a locking block, and the secondary operation due to a lineal section(s) of a main slide core operating cam.
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