| 摘要 |
PURPOSE:To obtain a shape, on both the surface and the back thereof die-surface form is reproduced accurately and which is excellent in size accuracy, by vacuum-forming the resin foamed sheet by using female and male dies, which each have vacuum suction holes and constitute a cavity in the form of the shape on mold clamping. CONSTITUTION:The thermoplastic plastic foamed sheet (preferably, one of independent bubble structure) 1 is heated and softened by a heater 3, said foamed sheet 1 is pushed in up to the midway of the female die 2 by the bottom of the male die 4 while being sucked under vacuum from the suction holes 5 of the female die 2, and the foamed sheet 1 is fast stuck to the surface of the female die 2. The male screw 4 is further dropped to close both dies, and the aimed shape 7 is obtained through vacuum suction from the suction holes 6 of the male die 4. EFFECT:Both the surface and the back are smooth and fine. |
