アルミナ射出成形品の品質に及ぼす因子の影響

抄録

Injection molding has an advantage used in making of complicated 3dimensional products. The ceramics injection molding process is mainly composed of four stages. Namely these are the kneading of mixture, the molding process, the degreasing process and the burning process. Each process has many parameteres. To obtain the optimum condition for getting a consistently high strength of the product, an S/N analysis developed by Dr. Taguchi was adopted. The optimum condition for obtaining high strength and quality of products could be accomplished by setting seven factors and two or three levels for each factor. Bending strength depends on the degreasing rate and sintering temperatures. And hardness in product depends only on the factor of sintering temperature. As the sintering temperature rises, the bending strength and hardness of product increase to high values, which lead to a small pore inside the product. In particular, alumina ceramics characteristic is drastically improved by sintering temperature higher than 1823K.