| 摘要 |
The present invention is for a means for use in injection molding of thermoplastic material with use of a sprue bushing (1). The sprue bushing, which may include a front piece, improves the possibilities to reduce the heat dissipation from the thermoplastic material to the material in and adjacent to the tip of the bushing and the wear of the material of the bushing is reduced. According to the invention there is an insert bushing (4, 9, 15) of ceramic material present at the tip of the sprue bushing/front piece. <IMAGE> |
