Blow molding device

摘要

A blow molding device, having: a mold; a blow nozzle tightly communicating with a mouth tubular part of a preform when the preform fitted in the mold; and a stretch rod, the blow molding device imparting shape to a container by longitudinally stretching the preform by means of the stretch rod and stretching the preform into an expanded shape by means of a pressurized liquid fed, via the blow nozzle, from a pressurized liquid feeding part separately provided, in which the blow nozzle has a support part for supporting the posture of the stretch rod, and a filling head part communicating with the mouth tubular part of the preform, the filling head part having a feed channel formed therein in the axial direction; and the support part and the filling head part are configured to be detachably coupled to each other in the vertical direction.

主权项

1. A blow molding device having:
mold for blow molding; a blow nozzle tightly communicating to a mouth tubular part of a preform in a bottomed cylindrical shape when fitted in the mold; a stretch rod inserted in the axial direction through the blow nozzle, the blow molding device imparting shape to a container by longitudinally stretching the preform by means of the stretch rod while stretching the preform into an expanded shape by means of a pressurized liquid fed, via the blow nozzle, from a pressurized liquid feeding part separately provided; in the filling head part, a valve mechanism disposed on the downstream side end of the feed channel so as to be capable of opening and closing the feed channel, wherein: the blow nozzle has a support part for supporting the posture of the stretch rod, and a filling head part communicating to the mouth tubular part of the preform, the filling head part having a feed channel formed therein in the axial direction and an introductory route of the liquid to the feed channel; the support part and the filling head part are configured to be detachably coupled to each other in the vertical direction; and the blow molding device is configured to allow, by means of the valve mechanism in the closed state, the liquid to circulate between the feed channel and the pressurized liquid feeding part and also to allow, by means of the valve mechanism in the open state, the liquid to be fed as being pressurized into the preform via the feed channel.