| 摘要 |
PURPOSE: To provide a preformed part in which desired temperature distribution is obtained in a short time. CONSTITUTION: A preformed part 1 is made of a thermoplastic material, especially those suitable for a blow forming, and has an opening 5, closed bottom 2, and a wall 4 which connects the bottom to the opening. At a part of the inner or outer surface of the preformed part 1, a dent/projection 8 with depth shorter than the wall width of the preformed part 1 is provided to widen the surface area. |
