| 摘要 |
PURPOSE: A valve pin height adjusting device of a hot runner system for an injection machine is provided to regulate the protruding length of a valve pin by opening a cover of a cylinder without separating a piston coupled with the valve pin. CONSTITUTION: A valve pin height adjusting device of a hot runner system for an injection machine comprises a piston(12) vertically moved by air, a pin clamp(14) screwed into a screw joint hole(15) of the piston and coupled with a valve pin(18) on the bottom thereof, and a loosening prevention washer(19) and a piston screw(13) which are connected to the top of the pin clamp to doubly prevent the pin clamp from loosening. The height of the valve pin is regulated by the vertical motion of the pin clamp and the piston screw.
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