Applying Six Sigma Approach and FMEA in Cold Slug Improvement of Plastic Injection Molding (A case study of S Company)

• Main Authors: Yu-chi Wang, 王毓麒
• Other Authors: Fu-shiang Tseng
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/52816471755934615181

碩士 === 國立中央大學 === 工業管理研究所碩士在職專班 === 100 === Along with the continuously increasing cost of plastic raw materials, the injection molding industry has got into the Low-profit times. In spite of there are strong raw material R&D team and the outstanding product design ability. However, if it is no well control of process systematically and standardized, this strength will be nibbled away or even resulted of loss by producing too many waste and nonconforming products. Therefore, it is an urgent issue to enhance the material efficiency then reduce the defect rate in injection molding process. The purpose of this thesis is based on the S company’s historical defect data of injection molding to apply Six Sigma approach to implement measurement, Analysis, improvement, action drawing up and execution, and to use PFMEA to evaluate, control and standardize to avoid the reoccurrence of cold slug defect with its preventive characteristics. As the results of the analysis, it is defined an efficient improvement process to significantly reduce the cold slug defect of injection molding through this research. Furthermore, the improvement tracks can be left for company to implement and build up the PFMEA then do the knowledge management well of process improvement, it is also a practical training material for process members. We can further follow this improvement pattern to implement improvement for the other defect modes.