| 摘要 |
PURPOSE:To increase the strength of a thermoplastic resin container, etc., by a mothod in which a resin sheet is pressed into a female force by a plug and uniformly tensed without clampling it to the end face of the female force, and then the resin sheet is clamped to the end face of the female force and molded into the shape of the female force by pressure difference. CONSTITUTION:A resin sheet 16 not pretensed is put between a female force 11 and a plug 13, and the tip of the plug 13 is contacted with the resin sheet 16 to press it into a cavity 11A by a given amount for pretension. In this case, the resin sheet 16 is not clamped by a clamper 14. The resin sheet 16 in this state is pressed into the cavity 11A by a given amount by means of the plug 13 and clamped to the end face 11B by a clamping plate 14 for the first place. A pressure difference is produced on both end faces of the sheet 16 in air paths 12 and 15, and the sheet 16 is molded along the cavity 11A to form plural resin containers, etc. Moldings of uniform thickness and high strength can thus be obtained. |
