PREFORM-HOLDING JIG FOR BIAXIAL STRETCHING BLOW-MOLDING

摘要

A pin insertion hole into which a stretching pin is inserted is formed through the center of a tubular jig main body. A mouth portion of a preform having a cylindrical shape with a bottom and made of a synthetic resin is fitted up to its fit-in limit into a tip portion of the jig main body and assembled. A support portion for holding the posture of the assembled preform is provided in a position opposing to a beadeing portion of the mouth portion, on the internal periphery of the tip portion of the jig main body. The support portion contacts with the external periphery of the coupler portion of the mouth portion in a manner that the mouth portion can be fitted in/pulled put. Thus, a holding jig that can hold stably and fixedly the posture of a preform is provided, and high productivity of bottles by biaxial stretching blow-molding is achieved with the jig.