中文摘要：

针对注塑生产过程中手动清洗料筒对注塑精度和塑化装置的影响，为了保护重要塑化元件，在原有注射装置不改变的前提下，提出对料筒中螺杆进行智能自动清洗功能的控制方案，构建智能自动清洗控制系统，阐述了自动清洗系统控制部分的组成、运动原理及工作过程。建立进入自动清洗程序模块的判定条件，对需要进行自动清洗料筒的工况进行智能判断，根据清洗对象建立清洗工艺数据库，基于Linux环境与华中数控HNC-8数控开发平台开发控制程序。以预设的清洗工艺参数对150g聚丙烯原料进行自动清洗测试，并与手动清洗进行对比试验，结果表明，自动清洗效率比手动清洗平均提高33．7％，一次清除残料率比手动清洗高1．84％，因此智能自动清洗效率更高，清洗效果更佳，避免了手动清洗方式下操作人员依靠经验手工清洗的不确定性。在自动清洗的过程中，系统按照程序或用户设定的安全工艺参数进行自动清洗，保护了螺杆的注塑精度和机器的使用性能，提高了产品质量和精度。

英文摘要：

The manual style had a very negative impact on the plasticization apparatus and precision of injection, so this paper aimed to propose an intelligent automatic purging system and control method for all- electric injection molding machine in order to protect the key plasticization component-screw, which was assembled in the barrel of injection molding machine. The structure, operating principle and program diagram about this control system were introduced. The determinant conditions of entering the automatic purging process were established. Using the determinant conditions, the system can determine intelligently whether the barrel of injection molding machine was needed to be purged or not. A process parameters database of automatic purging was established according to the type of plastic material. The control system was constructed in Linux operating system and Huazhong CNC system platform HNC-8. In each experiment, the PP material of weight of 150 g totally was used to test. The result showed that the automatic purging efficiency was more than the manual＇s by 33.7%, and the weight percent of purged remnant material by automatic purging was less than the manual＇s by 1.84%. Therefore, the efficiency of the designed automatic purge system was superior to the manual. The proposed method can assure the screw＇s injection precision and performance of the machine, and finally improve the molded part quality and precision.