To provide a manufacturing method of a resin-made sleeve capable of manufacturing the resin-made sleeve having high molding precision.
In the method, a resin-made sleeve is manufactured by using a mold for injection molding having a female mold 31 and a cylindrical slide core 32 provided so as to advance to and retreat from the female mold 31. After the slide core 32 is inserted in the female mold 31, and a plurality of pins 33 is inserted in the female mold 31 so as to be approximately orthogonally to the insertion direction and so as to sandwich the slide core 32 from both sides to inject a molten resin between the female mold 31 and the slide core 32 in such a state that the tip end of the pin 33 is brought to contact with the slide core 32.
OGIWARA KUNIO
Yoshiaki Naito
Cui Shu Tetsu
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