Quality Prediction for Injection Molding by Using a Multilayer Perceptron Neural Network

被引:60
|
作者
Ke, Kun-Cheng [1 ]
Huang, Ming-Shyan [1 ]
机构
[1] Natl Kaohsiung Univ Sci & Technol, Dept Mechatron Engn, 1 Univ Rd, Kaohsiung 824, Taiwan
关键词
cavity pressure; injection molding; intelligent manufacturing; multilayer perceptron model; quality prediction; OPTIMIZATION; MACHINE; MODEL;
D O I
10.3390/polym12081812
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Injection molding has been widely used in the mass production of high-precision products. The finished products obtained through injection molding must have a high quality. Machine parameters do not accurately reflect the molding conditions of the polymer melt; thus, the use of machine parameters leads to erroneous quality judgments. Moreover, the cost of mass inspections of finished products has led to strict restrictions on comprehensive quality testing. Therefore, an automatic quality inspection that provides effective and accurate quality judgment for each injection-molded part is required. This study proposes a multilayer perceptron (MLP) neural network model combined with quality indices for performing fast and automatic prediction of the geometry of finished products. The pressure curves detected by the in-mold pressure sensor, which reflect the flow state of the melt, changes in various indicators and molding quality, were considered in this study. Furthermore, the quality indices extracted from pressure curves with a strong correlation with the part quality were input into the MLP model for learning and prediction. The results indicate that the training and testing of the first-stage holding pressure index, pressure integral index, residual pressure drop index and peak pressure index with respect to the geometric widths were accurate (accuracy rate exceeded 92%), which demonstrates the feasibility of the proposed method.
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页数:22
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