Numercal study on the two dimensional wick debinding of the metal injection molding

• Main Authors: Y. S. Cheng, 鄭育宗
• Other Authors: L. W. Hourng
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/74151216211841620990

碩士 === 國立中央大學 === 機械工程研究所 === 87 === Metal injection molding (MIM) is a method in metallurgy that combines the benefits from both plastic molding and powder molding. Its advantages include high capacity, high accuracy, low cost for mass production, capability in treating complicated shapes and insensitivity of material using. In the MIM production processes , debinding is the most important and time consuming one. Failing in this key process always leads to the overall failure of the MIM production. To analyze the global behavior of the two dimensional wick debinding, we apply porous media theories and the finite element technique combined with body-fitted grid generation method. The variables which include binder viscosity , the size of the powder , the permeability and prorsity , control the debinding velocity , debinding time and the transform of the binder front . Although quantitatively, the result of simulation still is a great different with the experiment , The some conclusion is got , like that the external of the binder in the wick materal is similar with the one of the compact ,and the debinding time is the proportion with the area of the circle and quadrate compact .