Metal powder micro injection molding

Traditional powder injection molding technology, can be made to 01 ~ 1mm size parts, has made the smallest 20mg parts. But with the development of the micro system, including micro optics, minimum damage to the surgery and micro fluidic technology, the need for complex shape, size in the micron range of metal and ceramic parts. Micro injection molding is suitable for mass production of micro structure parts.

Germany 10 years ago began to study micro injection molding technology, but the raw materials for thermal plastic plastic, the small size has reached 0.2 um. The German research foundation, is studying the micro metal injection molding technology and micro ceramic injection molding. The powder is used as the average particle size of 15 mu m carbonyl iron powder, 4 to 5 m stainless steel powder and 0.6 m of aluminum oxide powder. The binder has self mixing polyolefin / wax compound and normal compound. In the study, the method of removing binder has the heating removal of organic compounds, the catalytic removal of the aldehyde compounds and the supercritical carbon dioxide desorption method.

After the system, the density of the product is 98%, and the linear shrinkage is 15% ~ 22%. The smallest micro ceramic injection molding structure with a size of 10 m, micro injection of ceramic gear weight is only 0 5mg, the smallest micro metal injection molding parts size of 50 m. Micro injection molding for micro pump, micro gear, micro turbine, minimal damage surgery, micro catheter, etc.