| 摘要 |
PURPOSE:To complete a spotting operation between PL surfaces without experienced skill and in a short time by a method wherein a projecting edge of soft metal is projected all over the circumference of portions along the covity of the PL surfaces. CONSTITUTION:The fixed mold 6 and the movable mold 7 are cast from soft metal and a projecting edge 10 is provided all over the circumference of portions along the cavity 9 of the PL surface 8 of the fixed mold 6. Then, the fixed mold 6 and the movable mold 7 are mold-registered with each other and pressed, while making the projection 10 perform spotting against the PL surface 11 of the movable mold 7 which faces thereto through the plastic deformation process. The space between the PL surfaces 8, 11 over the whole circumference of the portion along the cavity 9 remains closed favorably and flashes hardly occur on the moldings. |
