Adhesive and feeding material prepared thereby for metal powder injection molding

Abstract

The invention relates to the metal powder injection forming field, in particular to binding agent and feeding which is used for the metal powder injection forming which is prepared. The binding agent comprises thermoplastic elastic compounded rubber, industrial paraffin, high density polythene HDPE, propene polymer PP and geoceric acid, and the feeding is prepared through procedures of mixing according to material ratio, heating extrusion, cooling disintegration and vacuum packaging and the like. And the effects of the invention are the the solid loadage of feeding is over 60%, liquid and solid are not easy to be separated when in forming, the sticky point technology is simple, cost is low, sticky blank point height is high, sintering blank density is high and the product price is lower.

Description

Technical field [0001] The invention relates to the field of metal powder injection molding, in particular to a binder and a feed material for metal powder injection molding prepared therefrom. Background technique [0002] Metal powder injection molding (MIM) is a new forming technology that has developed rapidly in the world in recent years. Its advantage is that it can form small parts of any complex shape, and the density of each part of the product is uniform and the performance is excellent. An important aspect of this technology lies in the selection and preparation of the feed material in order to reduce the processing time, avoid the holes, defects formed by the feed material, and at the same time maintain the consistency of density. And the key to MIM technology is the choice of binder. At present, domestic manufacturers of iron-based and stainless steel (MIM) technology basically use foreign feeds directly, or feeds of the wax-based system commonly used in China....

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in order to overcome the solid loading of the feed, that is, the volume fraction of the metal powder occupied by the material is lower than 60%, the debonding strength of the product is not high, the debonding process is complicated and the cost is high, and the liquid-solid phase during forming The shortcomings of easy separation and uneven density of the injection blank provide a binder and a feed material for metal powder injection molding made of it.