| 摘要 |
PURPOSE:To improve appearance, while the surface difference and the step difference of the connected part between extrusion molding part and the molding part of a mold are made small by a method in which when the molding part of the mold having almost the same cross sectional shape as the extrusion molding part is molded and is connected to the extrusion molding part simultaneously, the notch extending in the direction perpendicular to an end surface is preliminarily formed on the end surface of the connected part of the extrusion connecting part. CONSTITUTION:A mold 5 is applied to the end of extrusion molding part 1, and the mold 5 is charged with raw material and molding is performed, and then when the mold is connected to the extrusion molding part 1 simultaneously, since a notch 4 absorbs the deviation of cross sectional dimension, the surface difference and the step difference of the connected part 3 are removed, whereby its appearance is improved. Normally, the larger the notch length L of the notch 4 is, the smaller the raised part of the connected end of the extrusion molding part 1, whereby the surface difference and the step difference become small and its surface becomes smooth. Its appearance is improved, but in the case of a weather strip, the length L of the notch is preferably about 8 - 10 mm, and the raw material in the mold 5 flows into the notch 4 and the notch is filled therewith. |
