| Summary: | 碩士 === 國立臺北科技大學 === 製造科技研究所 === 97 === The purpose of this study is to investigate the optimum reinforced ribs design of the plastic injection thin shell pieces subjected to concentrated loading, The research procedures include the following: first, 3D model of the plastic shell is created based on plastic mold reference design benchmarks and industrial oriented design experience. Second, the commercial finite element analysis software is used to simulate the thin shell plastic parts under proposed concentrated load. Third, the Taguchi method of experimental design process is applied to evaluate the contributions of each selected design parameters based on the objective function, that is, minimum deformation of the thin shell parts. Preliminary results obtained from this case study show that the first five important parameters that affecting the stiffness of the structure of eight parameters selected for this study are rib height (22.62%), finished product thickness (18.72%), rib configuration (18.66%), number of ribs (15.76%), and the sidewall reinforcement (10.07%). Therefore, increasing the height of ribs if possible seems to be an effective way to improve the strength of plastic shell to resist deformation.
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