| 摘要 |
PURPOSE:To prevent flow marks and ununiform luster on the surface of a terminal cap from developing by a method wherein the end parts of an extruded product having a groove on its rear surface, are arranged in a mold and molten resin is filled into terminal cap cavities so as to force the molten resin at the early stage of filling in the groove on the rear surface of the extruded product. CONSTITUTION:As an extruded product 20, an extruded piece, which is made foamed or non-foamed plastic such as non-rigid polyvinyl chloride resin or the like and cut in length and on the rear surface of which a longitudinal groove 40 is provided in advance, is used. The extruded product 20 is arranged in the extruded product housing cavity 30 of a mold and, after that, molten resin is filled through a sprue 38 and runners 34 from molten resin inlets 36 and 36 into terminal cap cavities 32 and 32. The molten resin filled into the cavities 32 and 32 flows along cavity surfaces and reaches the ends 20a and 20a of the extruded product and, after that, flows along the ends to the rear surface side of the extruded product 20 and finally flows into the groove 40. As a result, terminal cape 22 and 22 consist of uniform resin excluding portions, which harden at the early stage of filling and consequently do not have flow marks, ununiform luster or the like. |
