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注塑制品的重量重复精度是衡量注塑制品质量精度及评价注塑机性能指标的重要技术指标。文章基于统计过程误差理论确定了适应于注射重量重复精度的理论计算方法,并在实验的基础上得到了验证。同时通过更改影响熔体密度的主要工艺参数——温度和注射压力进行注射重量对比实验,确定了影响注射重量的主要工艺参数,提出了通过在线控制注射重量来提高注射重量重复精度的理论方法。
The weight repeatability of injection molded products is an important technical indicator to measure the quality precision of injection products and evaluate the performance index of injection molding machines. Based on the statistical process error theory, the article has determined the theoretical calculation method to adapt to the weight repeatability of injection and has been verified on the basis of experiments. At the same time, by changing the main process parameters affecting the melt density - temperature and injection pressure injection weight comparison experiments to determine the impact of injection weight of the main process parameters proposed by online control of injection weight to improve injection weight repeatability of the theoretical method.