精、速、密压铸是当前国内外正在发展的一项压铸新工艺,它和一般压铸相比,具有许多工艺上的特点:内浇口厚、压射速度慢,合金顺序凝固和内压射冲头补压。由于采用了以上这些措施,使铸件的质量和模具寿命方面大为提高,效果十分显著。 压铸件采用精、速、密压铸后,能提高铸件的抗拉强度、抗疲劳性能和耐压性能。由于压铸工艺条件的改变,使压铸件中气孔减少或 Precision, speed, die-casting is the current development of a new casting process at home and abroad, it is compared with the general casting, with many of the characteristics of the process: gate thick, slow injection speed, the order of the alloy solidification and internal pressure shot Punch pressure. As a result of these measures to make the casting quality and mold life greatly improved, the effect is very significant. Die casting using precision, speed, precision die casting, casting can improve the tensile strength, fatigue resistance and pressure performance. Due to the die casting process conditions change, so that die-casting holes in the reduction or