| 摘要 |
PROBLEM TO BE SOLVED: To provide a stretching blow molding method, with which the partial change of the wall thickness of a hollow continuum and the diametral change of the continuum after cooling be controlled and prevented or the like from developing, and its device. SOLUTION: This stretching blow molding device is equipped with a bottomed cylindrical mold 3 for guiding continuously extruding parison 2 under a thermally softened stage from the die 1 of an extruding machine therein. At the bottom of the mold 3, a guide bar 5 is disposed in upright so as to vertically movably and insertingly support a guide sealing fixture 9 for blocking the opening tip part of the parison thereonto. At the upper part of the guide bar 5, an inside temperature adjusting mechanism 15 for spraying a high temperature gas, which is higher than the deforming temperature of the parison 2, against the ununiform section developing portion of the inner peripheral surface of the parison 2 is installed. At the same time, above the opening part of the mold 3, an outside temperature adjusting mechanism 20 for blowing a low temperature gas, which is lower than the deforming temperature of the parison 2, against the ununiform section developing portion of the outer peripheral surface of the parison 2 is installed. Further, in the guide bar 5, gas supplying and carrying-off passages 24 for supplying a gas within the parison 2 and carrying the gas off the interior of the parison 2 in order to inflate the parison 2 are built. Furthermore, in the opening part of the mold 3, a sealing fixture 29 for blocking the terminal part of the parison 2 is detachably mounted.
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