| 摘要 |
PURPOSE: A method for forming a mold is provided to hide a parting line in an article by moving the parting line into a predetermined portion which has no functional problems. CONSTITUTION: When an injection molding process has been finished, a mold is closed, and plates(1,2) are opened until the undercut problem is solved. A lower plate(4) is moved by a moving distance of the plates(1,2) by means of a cam(3) attached to the plate(1). A gas spring(9) is provided to safely operate the lower plate(4) and a taper slide core(5). The taper slide core(5) attached to the lower plate(4) is operated corresponding to the taper stroke of the injection molding device, thereby solving the undercut problem. Then, the plates(1,2) are completely opened corresponding to the stroke of the injection molding device. After that, the core(6) is operated by a cylinder(7), so that the article can be withdrawn from the mold.
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