Metallic powder injection molding adhesive

Abstract

The invention relates to a binder which comprises the following components according to weight percentage: 15 percent to 25 percent of chlorinated polyethylene, 15 percent to 25 percent of polyformaldehyde, 3 percent to 10 percent of rubber, 20 percent to 30 percent of petroleum wax, 15 percent to 25 percent of Brazil wax (palm wax), 1 percent to 5 percent of stearic acid and 1 percent to 5 percent of epoxidized soybean oil. In the forming technique of metal powder, the binder can improve the strength of blank, reduce the damage of the blank and improve the finished yield and the production efficiency.

Description

technical field [0001] The invention relates to a bonding agent used in a metal powder injection molding process, in particular to a metal powder injection molding binder. Background technique [0002] In the metal powder forming process, the binder is used as a carrier. The metal powder can be formed smoothly with the help of a binder, and then the binder is completely removed (degreasing) by solvent dissolution and heating. Different metal powder injection molding processes are mainly due to differences in binders and degreasing techniques. Binders affect powder particle packing, agglomeration, compounding, rheological properties, forming, debinding, green strength, dimensional accuracy, product internal defects and final chemical composition. Therefore, the requirements for the binder include flow characteristics, degreasing characteristics, manufacturing process and interaction with metal powder. [0003] The main problems of the existing metal powder injection moldin...

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Problems solved by technology

[0005] The present invention aims to solve the problems of insufficient blank strength, low rate of high-quality products, slow debonding speed and low production efficiency existing in the processing of existing metal powder injection molding binders