Powder injection manufacturing method for producing high-precision and high-quality knives and scissors

Abstract

The invention discloses a powder injection manufacturing method for producing high-precision and high-quality knives and scissors. The method comprises the following steps: S1, material mixing and granulation: firstly, alloy powder and a binder are put into an internal mixer for uniform mixing, stirring and internal mixing, then a mixed material after internal mixing is put into a granulator for granulation, and then a prepared feed is collected and stored. The method relates to the technical field of powder metallurgy. According to the powder injection manufacturing method for producing the high-precision and high-quality knives and scissors, most binders are removed through catalytic degreasing in the acid atmosphere, the shape maintaining performance of blanks is good, a finished product obtained after follow-up high-temperature sintering is high in structure uniformity, good in compactness, reliable in physical performance and high in precision, meanwhile, the overall machining cost of the finished product is obviously reduced, the whole manufacturing process is shortened, the effects that the precision of the finished product is higher than that of casting, the surface treatment cost is low, and the material selectivity is high are achieved, and personnel and equipment are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a high-precision and high-quality powder injection manufacturing method for production of knives and scissors. Background technique [0002] Metal powder injection molding technology is a new manufacturing technology that combines powder metallurgy and plastic forming technology. It is the shape required by first mixing the selected powder with a binder, then granulating the mixture and then injection molding. The polymer imparts its viscous flow characteristics to the compound, which aids in forming, cavity filling and uniformity of powder loading. After forming, the binder is removed, and then the degreased body is sintered. Some sintered products may require further densification, heat treatment or machining. Sintered products not only have the same complex shape and high precision as those obtained by plastic injection molding, but also have physical, chemical an...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-precision and high-quality powder injection manufacturing method for knives and scissors production, which solves the problem that the finished products processed by the existing knives and scissors molding processing method have low precision and need to be processed before processing , the overall process personnel configuration and equipment investment are relatively large, the corresponding cost is relatively high, and the appearance of the product is uniform and uniform, and it is difficult to control the problem

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