Abstract
This study aims to develop processing techniques to improve dimensional accuracy of tiny parts produced by micro metal injection molding (μ-MIM). Micro dumbbell specimens were molded by a micro injection molding machine, which can be monitored with the mold pressure in injection process measured at the both side chucking portions. The effects of particle size distribution of stainless steel powders on the mold pressure and dimension in green compacts and sintered bodies were investigated. The reduction of the difference in dimension of chucking parts of micro dumbbell specimens to 5μm was achieved by using the powder undercut below 5μm in particle diameter.
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