| 摘要 |
A parison forming device comprises: a mold into which gob is introduced; a plunger which enters into the mold and forms a parison from the gob between the mold and the plunger; a cylinder which moves the plunger back and forth with respect to the mold; and a cooling device which introduces air for cooling inside the plunger to cool the plunger. A base end part of the plunger is connected to a distal end part of a piston rod of the cylinder and held with a plunger holding mechanism, the plunger holding mechanism has an adaptor which is connected to the distal end part of the piston rod, and the adaptor is integrally provided with a tubular part which has a fitting hole that fits the tubular outer shape of the base end part of the plunger. The base end part of the plunger is held in a fitted state in the fitting hole of the tubular part, and a connection ring that connects the adaptor and the base end part of the plunger is fitted on the tubular part of the adaptor. The inside of the plunger communicates with an air outlet path through an exhaust path provided in the adaptor, and the air outlet path communicates with an exhaust device which guides the air after cooling into the air outlet path by applying a suction to the air outlet path and discharges the air outside. |
