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Robust parameter search for IC tray injection molding using regrind resin
Journal of Polymer Engineering ( IF 1.7 ) Pub Date : 2020-11-26 , DOI: 10.1515/polyeng-2020-0097
Ming-Shyan Huang, Shih-Chih Nian

Abstract Quality consistency is essential in maximizing the productivity rate of the injection molding process and minimizing the production cost. The quality consistency problem is particularly acute in the case of injection molding processes performed using regrind resin, for which the rheological properties are less uniform and more unpredictable than those of virgin material. Accordingly, the present study proposes a two-stage approach for optimizing the injection molding process parameters in such a way as to achieve a consistent molding quality over repeated injection molding cycles. In the first stage, the values of the injection speed/pressure, velocity-to-pressure (V/P) switchover point, and packing pressure are individually determined based on an inspection of the cavity pressure profile and machine parameters provided by the injection molding machine controller. In the second stage, a robust parametric search method based on a first-order regression model is employed to determine the optimal combination of the process parameter settings. Using an Integrated Circuit (IC) tray fabricated from regrind resin for illustration purposes, the results confirm that the proposed method overcomes the problem of small variations in the melt quality and therefore provides an effective technique for improving the yield rate and quality of the continuous mass production.

中文翻译:

使用再生树脂进行 IC 托盘注塑成型的稳健参数搜索

摘要 质量一致性对于最大化注塑成型过程的生产率和最小化生产成本至关重要。在使用再生树脂进行注塑成型过程中,质量一致性问题尤其严重,因为与原始材料相比,其流变特性更不均匀且更难以预测。因此,本研究提出了一种优化注射成型工艺参数的两阶段方法,以便在重复注射成型循环中实现一致的成型质量。在第一阶段,注射速度/压力、速度-压力 (V/P) 切换点的值,和保压压力是根据注塑机控制器提供的模腔压力曲线和机器参数的检查单独确定的。在第二阶段,采用基于一阶回归模型的稳健参数搜索方法来确定工艺参数设置的最佳组合。使用由再生树脂制成的集成电路 (IC) 托盘进行说明,结果证实所提出的方法克服了熔体质量变化较小的问题,因此提供了一种提高连续质量的良率和质量的有效技术生产。采用基于一阶回归模型的稳健参数搜索方法来确定工艺参数设置的最佳组合。使用由再生树脂制成的集成电路 (IC) 托盘进行说明,结果证实所提出的方法克服了熔体质量变化较小的问题,因此提供了一种提高连续质量的良率和质量的有效技术生产。采用基于一阶回归模型的稳健参数搜索方法来确定工艺参数设置的最佳组合。使用由再生树脂制成的集成电路 (IC) 托盘进行说明,结果证实所提出的方法克服了熔体质量变化较小的问题,因此提供了一种提高连续质量的良率和质量的有效技术生产。
更新日期:2020-11-26
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