| 摘要 |
PURPOSE:To enable to manufacture an open-sided product or a product with intricate form by a method wherein parison is pinched between a gas blow-off member and a plurality of molds by shifting the molds and compressed gas is blown off from the blow-off holes of the gas blow-off member. CONSTITUTION:Firstly, parison 13 is extruded from an extruder 14 in between a gas blow-off member 12 and at least either one of molds 11a and 11b under the state that the gas blow-off member 12 is installed in the interior of a plurality of the molds 11a and 11b. Secondly, the molds 11a and 11b are shifted so as to close the molds. Thirdly, compressed air is blown off from a large number of blow-off holes bored on the blow-off member 12 under the state that the parison 13 is pinched between the blow-off member 12 and the molds 11a and 11b so as to press the parison against the molds along the form of a cavity in order to mold the parison into the predetermined form. Finally, an open-sided molded part is manufactured by opening the molds after the cooling of the parsion is competed and, after that, taking the molded part out of the molds. |
