PA66导杆A注塑件表面局部发亮缺陷的分析及措施

对汽车座椅PA66导杆A注塑件表面局部发亮的原因进行分析。结果表明，该缺陷是由于注塑件本身固有结构造成了在注射成型过程中其头部型腔排气不畅形成气囊，气囊中的高压、高温气体通过传热、渗透影响周围已成型的塑料，从而产生头部皮纹表面局部发亮现象。同时，介绍了采取在适合部位上设置排气槽，选择压力、温度设置精度高的注塑机及增大皮纹的粒度和深度等一系列有效措施消除该缺陷，从而彻底解决了这一技术难题：

ANALYSIS OF SOME SHINING DEFECT ON THE SURFACE OF INJECTION MOLDING NYLON 66 GUIDING ROD A AND ITS SOLVING MEASURES

The reason of some shining defect on the surface of injection molding nylon 66 guiding rod A for mobile seat was analyzed. The results showed that the defect was made by the gasbag formed by exhaust obstruction on the head during the injection molding process, and the high pressure and high temperature gas in the gasbag through heat conducting and infiltrating caused some head shining on the surface. At the same, it was introduced that some corrective measures such as making an exhaust groove at appropriate position, selecting an injection molding machine with high setting accuracy of pressure and temperature, and increasing the grain and depth to avoid the deffect and resolve the technical problems finally.