Binding agent for powder injection moulding, preparation method and application method of binding agent

Abstract

The invention provides a binding agent for powder injection moulding, a preparation method of the binding agent and an application method of the binding agent. The binding agent is mainly prepared from the following components in percentage by mass: 65 to 75 percent of polyformaldehyde, 4 to 9 percent of dioctyl phthalate, 6 to 13 percent of polyethylene, 1 to 3 percent of acrylate copolymer, 3 to 8 percent of polyacrylamide, 1.5 to 4 percent of paraffin, 2 to 6 percent of microcrystalline wax and 0.5 to 2 percent of ethylene vinyl acetate copolymer. In the binding agent provided by the invention, multiple types of components are combined through scientific compatibility, so that the compatibility between metal powder or ceramic powder and the binding agent can be obviously improved, and meanwhile, the binding agent can be quickly removed in a degreasing process without causing the defects of bubbling and cracking of a green body, so as to guarantee the quality of the green body.

Description

technical field [0001] The invention relates to the field of powder injection molding, in particular to a binder for powder injection molding, a preparation method and an application method thereof. Background technique [0002] Powder injection molding (MIM for short) is a new type of powder metallurgy near-net molding technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy. As one of the four major methods of product production and processing, this technology is a high-tech that has developed rapidly in the field of powder metallurgy and industry in recent years. It has attracted more and more attention. Countries and manufacturers have begun to increase research and development in this area. and input. [0003] Binders are an important part of the powder injection molding process. In the production process of powder injection molding, in order to make the metal powder or ceramic powder have good fluidity to fill t...

AI Technical Summary

Problems solved by technology

The binder for powder injection molding provided by the present invention overcomes the problems that traditional binders tend to cause defects such as bubbling and cracking in the green body during the degreasing process, and uses the characteristics of each component to combine various components through scientific compatibility. Combined together, it can not only significantly improve the compatibility between the metal powder or ceramic powder and the binder, but at the same time, it can be quickly removed during the degreasing process without causing defects such as bubbling and cracking in the green body, thus ensuring Green body quality

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