| 摘要 |
PURPOSE:To conduct proper molding even when a resin having remarkable drawdown is used. CONSTITUTION:A parison receiver 22 at the specified position of the lower section of a die 16 is arranged, the lower end of a parison 20 in fixed length is supported by the parison receiver 22, and the torn-off of the parison 20 and the lengthening of the parison more than required are prevented even when the drawdown of the parison 20 is remarkable. The correction signal of the lowering speed of the parison receiver 22 is output in response to the deviation of a signal from a speed detector detecting the lowering speed of the parison and a predetermined speed signal. |
