| 摘要 |
PURPOSE:To enhance the releasability of an unnecessary thread from a molding die by providing a resin charging area including an unnecessary part of a stretched thread to be embedded in a molded piece in addition to a resin charging area corresponding to the shape of the molded piece. CONSTITUTION:A twisted nylon fiber thread is stretched between resin charging areas 2 in the vicinities of both ends of arc-form base parts of molds 7, 8. The molds 7, 8 are closed. At this time, the both ends of the twisted nylon fiber thread outside the vicinities of the ends of the arc-form base parts are crushed by the molds 7, 8. When the molds 7, 8 are closed, the twisted nylon fiber thread outside the crushed part is cut off by a cutting edge 14. after that, a polystyrene resin is injected into the resin charging areas 2 from a gate 9. In this manner, the releasability of an unwanted thread 3 from the molding die can be enhanced in comparison with a prior art. |
