| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot runner-type injection-molding die with a gate which forms an injection-molded product without trouble and at a low cost. SOLUTION: This injection-molding die comprises a cavity-side half and a movable half which is mounted in a freely opening/closing manner and is structured so that a molding cavity formed by the cavity-side half and the movable half and a nozzle formed at the cavity-side half communicate with each other by a hot runner-type resin passage. The cavity-side half has a hot runner block with an internally formed resin passage, and a gate bush with an internally formed resin passage communicating with the described resin passage is installed in a direction where the movable half moves. A valve pin is attached to the resin passage inside the gate bush and the valve pin is connected, in a freely advancing/receding manner, to a cylinder installed on the hot runner block through a heat insulating member so as to open/close the gate of the gate bush. COPYRIGHT: (C)2004,JPO
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