| 摘要 |
PURPOSE:To improve the strength and safety in handling, by a method wherein lower and upper surfaces for will holes is formed into a size having specific thicknesses inward and outward, and a flat surface connecting the inside edge of the wall-hole upper surface and the outside edge of the wall-hole lower surface is inclined outward more than or equal to a specific angle to a horizontal surface. CONSTITUTION:A container is formed by injecting filler into a space between a male die 60 and a female die 70 fitted together so that they can be separated upward and downward. The outward sides of the male die 60 which forms the entire area of the internal surface of the container form a plurality of wall-hole lower surface formation part 65 for forming a lower surface 50 for wall holes 16 while obtaining inward and outward a specific thickness, W 50. The sides of the female die 70, on the other hand, form a plurality of wall-hole upper surface formation parts 74 for forming an upper surface 51 for the wall holes 16 while obtaining inward and outward a specific thickness, W51. The sides of the dies 60 and 70 form overlapping faces 66 and 75 along a flat surface, connecting the inside edges 74A of the wall-hole upper surface formation parts 74 and the outside edges 65B of the wall-hole lower surface formation parts 65, which is inclined outward at least more than or equal to 90 deg. to a horizontal surface H. |
