Reducing Warpage of Injection Molding Products using Response Surface Methodology
Received: 7 February 2025 | Revised: 2 March 2025 | Accepted: 7 March 2025 | Online: 4 June 2025
Corresponding author: Van-Long Trinh
Abstract
Injection Molding (IM) is a mass-production method for plastic products. Warpage is the lancinating defect of plastic parts that occurs during the IM process. The defect can be controlled through an optimal set of processing parameters during the IM process, such as melt temperature, mold temperature, packing pressure, and cooling time. This study presents a method to reduce the warpage of IM products using the Response Surface Method (RSM) based on the Box-Behnken technique. This study used Polyamide-6 (PA6), a semi-crystalline thermoplastic with lightweight, wear resistance, hardness, strength, damping, and toughness characteristics. Experiments were simulated and analyzed using a Moldex3D simulation tool, and the effect of each processing factor on the warpage was investigated using ANOVA. The results show that RSM is effective in finding the best combination of processing parameters to minimize warpage defects during the IM process.
Keywords:
injection molding, response surface methodology, PA6, processing parameters, warpageDownloads
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