Patent ID: 6843955
Filing Date: 2005-01-18
Classification: A61B,A61M

Abstract:
1. A method for forming an injection molded sintered ceramic parts, comprising the steps of: a) mixing inorganic particles with non-gel forming water soluble organic binders having molecular weight between 1000 and 1,000,000 to form a mixture, wherein the organic particles weigh between 0.5% and 10% of the mixture including plasticizers, water and processing aids in a mixer, wherein the non-gel forming water soluble organic binders are composed of high and low molecular weight organic binders, and wherein a weight fraction of the high molecular weight organic binders with respect to the low molecular weight organic binders varies between 0.1 and 1.6; b) compounding the mixed inorganic particles and the non-gel forming water soluble organic binders at a high temperature in the range of between 70° and 98° Centigrade, under shear force, to form a homogenous viscous slurry in the range of 5×10 c) cooling the homogenous viscous slurry to room temperature to form a compounded solid mass; d) grinding the compounded solid mass to small pellets to provide feed stock for an injection molding machine; e) injection molding the feedstock to produce a green part; f) drying the green part at ambient temperature to form a dried green part; and g) sintering the dried green part to form an injection molded ceramic part.