汽车扬声器保护罩注塑质量缺陷分析及改善

针对汽车扬声器保护罩生产中出现的填充不足、缩痕、熔接痕、毛刺等缺陷,从注塑材料、注塑设备、工艺条件等方面进行分析.对填充不足重点从温度条件上进行改善;对缩痕从工艺条件方面增加注塑压力、提高注射速率来改善;对于熔接痕通过提高螺杆转速和模具温度来改善;对于毛刺通过确认锁模力和模具的状态,根据具体原因来解决.

DEFECT ANALYSIS AND IMPROVEMENT OF CAR SPEAKER COVER

To solve the defects such as injection shortage,shrink mark,weld line and burr appeared in the manufacture process of car speaker cover,the problem was analyzed from aspects of material,equipment,technics and so on.The injection shortage was solved through improving the temperature condition;the shrink mark was solved through increasing the injection pressure and velocity;the weld line was solved through increasing rotate speed of screw and the mould temperature;the burr was solved through finding out the c...