| 摘要 |
PURPOSE:To inhibit the cooling of a heated thermoplastic resin sheet and prevent the generation of a drag line, and to shorten homogenizing and molding cycles by preventing a wide contact with the end surface of a female die of the sheet when the sheet is stretched previously by a plug. CONSTITUTION:A resin sheet 32 is positioned along the inner circumferential surface of a cavity section 21A in a female die 21 by pressure difference through evacuation and air compression by air paths 41, 42 between the female die 21 and a plug 33. Since projecting sections 26 for mold-release plates 24 are further moved downward by fixing quantities by a drive, the sheet 32 after a molding is taken out by the female die 21, and mold-released. Accordingly, since the sheet 32 is brought into contact with the end surface 21c of the female die only by its corner section, the sheet 32 is hardly cooled by a contact with the end surface 21c, a drag line is not generated in a molding, and the sheet is also stretched excellently, thus manufacturing the molding having uniform thickness and superior strength. Since the female die 21 is cooled sufficiently, a molding cycle is shortened, and productivity is improved. |
