Optimization of Injection Molding Process Parameters to Improve Mechanical Strength of LFT Specimen

摘要

Despite their many advantages when compared to metal materials, automotive plastics are generally flawed in terms of mechanical strength and dimensional stability. Long fiber thermoplastics (LFT) can considerably improve these disadvantages. LFT can be manufactured using the injection molding method. However, short shot and lack of strength can occur based on process parameters. In this study, a mold is fabricated to produce specimens using LFT and the process range for complete molding is derived from basic tests of the injection molding process. Parameters affecting the strength are derived and analyzed to improve the mechanical strength of the injection specimens. Based on analytical results, the optimal process parameters for the highest strength within the given range are obtained.