Abstract

This study emphasizes the warpage phenomenon of thin-walled parts using acrylonitrile-butadiene styrene (ABS) plus polycarbonate (PC) plastics for optimal processing by thin-wall injection molding. The authors first employed the Moldflow software to analyze the runner’s balance on multicavities for thin-walled parts and to simulate the warpage of thin-walled parts with thin-wall injection molding. Then, this study used those data to fabricate a real mold by computer numerical control machining. For this study, the authors fabricated thin-walled parts and measured their warpage using various process parameters (injection speed, injection pressure, mold temperature, packing time, and melt temperature) with thin-walled injection molding. Finally, the authors found that the most important processing parameter was the packing time for warpage phenomenon of thin-walled parts by thin-wall injection molding.

Highlights

  • Thin-wall injection molding is used to manufacture thinwalled structures and is among the most common and versatile methods to mass-produce complex plastic parts

  • The results revealed the melt temperature of 235°C, injection pressure of 60 MPa, packing pressure of 30 MPa, and packing time of 5 seconds have the minimum value on warpage of injection molded part

  • The results showed that packing time, cooling time, and melt temperature are the most significant factors influencing warpage reduction

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Summary

Introduction

Thin-wall injection molding is used to manufacture thinwalled structures and is among the most common and versatile methods to mass-produce complex plastic parts. Thin-wall injection molding is utilized for parts with a thickness of

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