| 摘要 |
PROBLEM TO BE SOLVED: To obtain an injection mechanism which can return an injection member to an ordinary position surely by a reduced work load and an injector pin to an ordinary position irrespective of the position of an operation member to carry out next molding work. SOLUTION: When an injector rod 38 is moved relatively toward a core back plate 22 associated with the mold opening operation of a molding mold 10, an injector plate 28 and an injector back plate 26 are pushed, and the injector pin 32 is protruded into a molding area 16. The plate 28 and the plate 26 further approach the plate 22. When a guide block 46 is pushed to an inclined surface and moved, the plate 28 and the plate 26 receive the bias force of a compression coil spring 30 to be moved toward a mold base 24, and the tip of the injector pin 32 is prevented from protruding into the molding area 16.
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