| 摘要 |
PROBLEM TO BE SOLVED: To prevent a drip of a liquid from an injection nozzle in the injection molding of a liquid polymeric material composition; to accurately distribute and inject a predetermined quantity of the composition to each cavity of a mold with a plurality of cavities by a simple setting operation even in the case of the cavity with a small capacity, making the used quantity of the composition small; and to reduce poor molding, which is caused in the injection of the composition into the cavity, to the utmost. SOLUTION: The injection nozzle 14 is arranged in each of the plurality of cavities c in such a manner that an injection port 140 adjoins a gate 110 of the cavity; a nozzle closing pin 15 for closing the injection port is arranged in the injection nozzle; the injection port is opened by moving the nozzle closing pin, so that the injection of the liquid polymeric material composition b to the cavity can be started; and injection is stopped by sequentially and instantaneously moving the nozzle closing pin from the cavity which is filled with a predetermined quantity of the composition, so as to close the injection port. Thus, the composition is distributed and injected into each of the cavities by the predetermined quantity. COPYRIGHT: (C)2006,JPO&NCIPI
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