Wang Quan, Zhao Xiaomei, Zhang Jianpeng, Zhang Ping, Wang Xinwei, Yang Chaofeng, Wang Jinrong, Wu Zhenghuan
National Local Joint Engineering Laboratory of Intelligent Manufacturing Oriented Automobile Die & Mold, Tianjin University of Technology and Education, Tianjin 300222, China.
School of Automobile and Transportation Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China.
Polymers (Basel). 2021 Aug 17;13(16):2755. doi: 10.3390/polym13162755.
The cavity pressure in the injection molding process is closely related to the quality of the molded products, and is used for process monitoring and control, to upgrade the quality of the molded products. The experimental platform was built to carry out the cavity pressure experiment with a micro spline injection mold in the paper. The process parameters were changed, such as V/P switchover, mold temperature, melt temperature, packing pressure, and injection rate, in order to analyze the influence of the process parameters on the product weight. The peak cavity pressure and area under the pressure curve were the two attributes utilized in investigating the correlation between cavity pressure and part weight. The experimental results show that the later switchover allowed the injection to proceed longer and produce a heavier tensile specimen. By comparing different cavity pressure curves, the general shapes of the curves were able to indicate different types of shortage produced. When the V/P switchover position is 10 mm, the coefficient of determination (R value) of part weight, for the peak cavity pressure and area under the curve, were 0.7706 and 0.8565, respectively. This showed that the area under the curve appeared to be a better process and quality indicator than the peak cavity pressure.
注塑成型过程中的型腔压力与成型产品的质量密切相关，可用于过程监测与控制，以提升成型产品的质量。本文搭建了实验平台，采用微型花键注塑模具进行型腔压力实验。改变了诸如V/P切换、模具温度、熔体温度、保压压力和注射速率等工艺参数，以分析工艺参数对产品重量的影响。峰值型腔压力和压力曲线下的面积是用于研究型腔压力与零件重量之间相关性的两个属性。实验结果表明，较晚的切换允许更长时间的注射，并生产出更重的拉伸试样。通过比较不同的型腔压力曲线，曲线的总体形状能够指示出产生的不同类型的短缺。当V/P切换位置为10mm时，零件重量对于峰值型腔压力和曲线下面积的决定系数（R值）分别为0.7706和0.8565。这表明曲线下面积似乎比峰值型腔压力是更好的工艺和质量指标。
