球头螺母拉拔力的改进及维持措施

Improvement of Ball Nut Pulling Force and Maintenance Measures

球头螺母(下称螺母)使用尼龙66(PA66)黑料制作,PA66材料吸湿性较大,螺母产品会出现断裂纹和变软情况,对其力学性能影响较大。分析了螺母拉拔力下降的原因,在实际操作中通过采取对螺母材料进行干燥、选取合适的色母料、改进注塑工艺、调整模具结构、调湿处理等措施,对产品拉拔力进行改进,并取得了较好的效果。

The ball head nut (hereinafter referred to as nut) is made of nylon 66 (PA66) black material. PA66 material has greater hygroscopicity, and nut products can break and become soft, which has a great influence on its mechanical properties. The reason for the drop of the pulling force of the nut is analyzed. In actual operation, a number of improvements have been made to increase the pulling force of the product such as drying the nut material, selecting a suitable color base material, improving the injection molding process, adjusting the mold structure, and humidifying the nuts.The pull force is improved and achieves good results.