The Study on Micro Powder Injection Molding of a Ceramic Gear

• Main Authors: Ming Chia Chang, 張名嘉
• Other Authors: Chuang Wen Yao
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/61589052979766548553

碩士 === 國立高雄應用科技大學 === 模具系碩士在職專班 === 102 === The purpose of this study is to develop a zirconia micro gear with hardness higher than 1200 Hv using micro powder injection molding technology. A micro gear was designed first and Moldex3D analysis was carried out to find the best gating system for molding this gear. The green part was molded with Battenfeld microsystem 50 micro injection molding machine while Taguchi method was utilized to determine the best parameter settings. The green parts were further gone through debinding and sintering processes to complete the micro gear replication process. Results from the Taguchi method showed that the optimal molding parameters are spraying of release agent , packing speed 2 mm / s, injection speed 120 mm / s, male mold temperature 60℃, the female mold temperature 60℃, melting temperature 170℃, and the cooling time 20 sec. The ANOVA results indicated that cooling time, male mold temperature, and spraying of release agent influenced the molding quality most while packing speed and injection speed had no significant effect on the micro gear quality in this study.