| 摘要 |
PURPOSE:To perform smoothly the deaeration from a cavity so as to prevent large abnormal bubbles or lack of a wall from occurring, by using a mold for a foamed body having partition walls stood in the cavity. CONSTITUTION:Partition walls 3, 3' are formed with slits for drawing a seat cover, and the top of each partition wall is out of contact with the inner surface of the lid mold. The cavities 6 for projections that will be formed on opposite sides of a seat cushion have no partition wall, and therefore the chambers are in communication at the projections and tops of the partition walls. Injection ports 4, 5 formed in the side end of the front of the seat cushion and the side surface section between the first and second partition walls 3, 3' are positioned asymmetrically in a plane with respect to the X-X axis and Y-Y axis. For example, using an aluminium mold, the mold temperature is adjusted to 60 deg.C, the lid mold is closed under a clamping pressure of 2kg/cm<2>, and a raw liquid for a soft urethane foam is injected under an injection pressure of 80 kg/cm<2> for a shot period of 3.5sec. 2min after the injection, and when the molded item is removed, the foamed and molded item is free from a cavity or lack of a wall, so that a cushioning body quite good in appearance can be obtained. |
