| 摘要 |
PURPOSE:To prevent drooling through decreasing residual pressures by making the sprue volume of injection molding dies variable according to the move of plunger of a nozzle touch member fitted in the sprue. CONSTITUTION:There are arranged a hot runner 2 and a sprue 3 in the interior of runner block 1 on an injection molding die, and nozzles 4, 4 of more than one are mounted on the hot runner 2 against the gate for a cavity 5. The nozzle touch member 6 is that of integrating a plunger 7 fitted in the sprue for free sliding and a nozzle receiver 8, and a spring 11 to energize the nozzle touch member 6 outwards is arranged between a flange around the nozzle receiver 8 and a receiving member 10 for the runner block 1. Then, a cylindrical holder 12 for preventing the nozzle touch member 6 from coming off is screwed around the base for receiving member 10. |
