Fixing the Defects of Burn mark and Short shot by Reducing the Clamping Force in the Production Process of Bushing 63 by Numerical and Statistical Methods

علوم کاربردی و محاسباتی در مکانیک

Article 4, Volume 37, Issue 2 - Serial Number 40, June 2025, Pages 49-72   

Document Type: Original Article

DOI: 10.22067/jacsm.2024.88357.1264

Authors

Ali Jafarzadeh¹; Ghasem Azamirad^{* 2}; Roya Soltani³; Alireza Mollaei⁴

¹Department of Manufacturing Mechanical Engineering, Yazd University

²Mechanical Engineering, Yazd University

³Senior expert of quality control and laboratory department, Yazd Poolica Industries Manufacturing Company

⁴Ph.D. candidate, DTU Construct, Technical University of Denmark (DTU), Lyngby, Denmark

Abstract

The plastic injection process is useful for the mass production of complex parts due to its low cost and high efficiency. In this process, burn mark and short shot in the produced part are the first effective factors in rejecting or accepting it from the operator's point of view. In this research, bushing 63 piece made of UPVC has been investigated. Validated simulation is a low-cost alternative to experimentally performing the process to determine optimal values. Process parameters that can be changed on the injection machine are considered as input parameters. From the data screening method, the parameters affecting the process are identified. By the response surface method and variance analysis, respectively, to fix the considered defects with the minimum amount of clamping force required. Finally, the predicted output values from the CCD method, when compared with the simulation results, showed an average error of 6.03%, and as a result, it confirms the accuracy of the conducted research.

Keywords

Simulation of plastic injection process; Burn mark defect; Short shot defect; Clamping force; Statistical analysis

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