Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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Machine Learning Model for Reduction Deformation of Plastic Motor Housing for Automobiles

  • Seong-Yeol Han (Department of Digital Convergence Metalmold Engineering, Kongju National University)
  • Received : 2024.04.09
  • Accepted : 2024.06.30
  • Published : 2024.06.30
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Abstract

The purpose of this paper is to introduce a fusion method that combines the design of experiments (DOE) and machine learning to optimize the bias of plastic products. The study focuses on the plastic motor housing used in automobiles, which is manufactured through plastic injection molding. Achieving optimal molding for the motor housing involves the optimization of various molding conditions, including injection pressure, injection time, holding pressure, mold temperature, and cooling time. Failure to optimize these conditions can lead to increased product deformation. To minimize the deformation of the motor housing, the widely used Taguchi method, which is one of the design of experiment techniques, was employed to identify the injection molding conditions that affect deformation. Machine learning was then applied to various models based on the identified molding conditions. Among the models, the Random Forest model emerged as the most effective in predicting deformation amounts. The validity of the Random Forest model was also confirmed through verification. The verification results demonstrated the excellent prediction accuracy of the trained Random Forest model. By utilizing the validated model, molding conditions that minimize deformation were determined. Implementation of these optimal molding conditions led to a reduction of approximately 5.3% in deformation compared to the conditions before optimization. It is noteworthy that all injection molding outcomes presented in this paper were obtained through robust injection molding simulations, ensuring both research objectivity and speed.

Keywords

Acknowledgement

This work was supported by the research grant of the Kongju National University in 2023

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