| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding method and system capable of enhancing work efficiency because it is unnecessary to again introduce an injected purge into a dryer, even when the quality of the purge is insufficient and capable of easily improving quality accuracy to enhance a yield. SOLUTION: A gas discharge route 71 is evacuated in order to discharge the moisture or gas discharged from the pellets melted in the cytlinder 62 of an injection molding machine. Injection is performed according to the optimum accumulation quantity per a unit shot. Herein, the optimum accumulation quantity per a unit shot is obtained by controlling operation conditions such as the water content of resin pellets, the number of rotations of the screw in the injection molding machine, an one shot wt./cooling time, the supply amt. of pellets per a unit time, the vacuum degree in the cylinder, the preheating temp. and heating time of resin pellets, the supply amt. of air into the cylinder or the like.
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