| 摘要 |
PROBLEM TO BE SOLVED: To realize a blow molding method, with which a desired blow molded product can be molded with uniform section. SOLUTION: In this method, by extrusion-injecting a parison 36 from an upper die heat 35 between a female mold 32 having a cavity 31 with the required depth and a male mold 34 equipped with a core 33, which is housed in this female mold 32 and pushing the lower end part of the parison 36 to a male mold 34 side over the axis center line of the parison 3 by means of the pushing side pinching bar 37b of the pinching device 37 provided on the lower ends of the female and the male molds 32 and 34, the clamping of both the female and the male molds is performed. Near just after the completion of this mold clamping, the pushing side pinching bar 37b pinchingly clogs the lower end part of the parison 36 together with the receiving side pinching bar 38d of the pinching device 37 provided on the male mold 32. Next, air is blown in the parison 36 so as to mold the parison in the desired blow molded product. |
