MOLDING APPARATUS

摘要

A molding apparatus capable of improving the quality of a molded article is provided. A control section controls a blowing mechanism to expand and mold a metal pipe material by supplying gas into the metal pipe material held between an upper mold and a lower mold by a pipe holding mechanism. The control section controls a driving section to mold a flange portion by crushing a second molded portion of the expanded metal pipe material in a sub-cavity portion between the upper mold and the lower mold. In a molding apparatus, the control section changes movement speed of a slide during the molding of the flange portion by controlling a servomotor. Accordingly, it becomes possible to control an operation of pressing at an appropriate movement speed according to the shape or the like of the flange portion. Accordingly, it is possible to improve the quality of a molded article.

主权项

1. A molding apparatus that molds a metal pipe with a flange, comprising:
a first mold and a second mold that are paired with each other; a slide configured to move at least one of the first mold and the second mold; a driving section that is provided with a servomotor configured to generate a driving force for moving the slide; a holding section configured to hold a metal pipe material between the first mold and the second mold; a gas supply section configured to supply gas into the metal pipe material held by the holding section; and a control section configured to control the driving section, the holding section, and the gas supply section, wherein the control section controls the gas supply section so as to expand and mold the metal pipe material by supplying gas into the metal pipe material held between the first mold and the second mold by the holding section, controls the driving section so as to mold a flange portion by crushing a portion of the expanded metal pipe material by the first mold and the second mold, and changes movement speed of the slide during molding of the flange portion by controlling the servomotor.