| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin-feeding section which can increase a pressure for increasing the filling property of a liquid-form resin after the liquid-form resin is injected in the cavity under a pressure-reduced state, and of which the structure for pressurizing equipment can be simplified as well, for an injection-molding die. SOLUTION: A resin injecting section is constituted of a pot 1 and a piston 2. In this case, the pot 1 comprises a tapered section 11 which becomes wider as approaching the top, and a straight section 12 which is connected to the bottom of the tapered section 11. The piston 2 has an outer diameter which coincides with the inner diameter of the straight section 12. An injection port 13 is arranged on the bottom section of the straight section 12. When the piston 2 is located at the straight section 12, the injection port 13 is closed by the piston 2. In the meantime, when the piston 2 is retracted to the tapered section 11, the injection port 13 is opened. When the piston 2 is located at the straight section 12 again, air in the straight section 12 is compressed, and the pressurization after the injection is performed.
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