| 摘要 |
PROBLEM TO BE SOLVED: To prevent the flaw of a molded article such as scorching, a black spot or the like caused by the long-term stagnation of a resin by providing the injection port provided to the center of the inner surface of the leading end of a cylinder so as to shift the same to the side facing a resin inflow port. SOLUTION: The injection port 8 of the inner surface 7 of the leading end of the injection cylinder 1 is shifted to the side facing the inflow port 9. The leading end surface 7a of the cylinder on the facing side up to the injection port 8 is formed into a gentle slope from the leading end surface 6 of a plunger. A resin rich area 12 which the injection port 8 faces is formed between the leading end surface 7 of the cylinder on the facing side and the leading end surface 6 of the plunger.
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