Powder metallurgy mould pressing process for metal zipper teeth

Abstract

The invention discloses a powder metallurgy mould pressing process for metal zipper teeth. The powder metallurgy mould pressing process for the metal zipper teeth comprises the following steps: S1, preparing materials, namely, uniformly mixing metal powder and an adhesive; S2, pressing and moulding, namely, filling a pressing mould of a powder moulding machine with the mixed metal powder for pressing and moulding to obtain a metal zipper tooth green body in a specific shape; S3, sintering and moulding, namely, performing vacuum sintering and moulding on the metal zipper tooth green body in a stainless steel vessel or a ceramic vessel in a vacuum sintering furnace to obtain metal zipper teeth which meet mechanical properties, wherein the sintering temperature is 1,200 DEG C to 1,300 DEG C, and the sintering time is 90 minutes to 120 minutes; S4, after the sintering and moulding are performed, filling nitrogen gas or argon gas to cool the metal zipper teeth; and S5, after the metal zipper teeth are cooled, taking out the metal zipper teeth, and performing surface grinding treatment on the metal zipper teeth. The powder metallurgy mould pressing process for the metal zipper teeth does not need stamping machining, is high in precision and high in production efficiency, can directly manufacture porous, semi-dense or full-dense products, and moreover, is suitable for machining zipper teeth of various shapes and various materials.

Description

technical field [0001] The invention relates to the technical field of metal zipper production technology, in particular to a powder metallurgy molding production process of metal zipper elements. Background technique [0002] Metal zippers refer to zippers whose teeth are made of copper, stainless steel, aluminum and other metal materials. Compared with nylon zippers and resin zippers, they are stronger and are mostly used on jeans, coats and backpacks. Metal zipper elements are currently produced by stamping methods, and the materials are mostly copper or copper alloy. The production process of metal zipper elements refers to the manufacturing process of two-way metal zippers in China's invention application 200610122255.0. The specific steps are: A. Feeding, through the general The feeding mechanism of various single-axis punching machine hosts with automatic feeding function feeds the metal wire into the stamping area of ​​the precision combined metal shearing cold stamp...

AI Technical Summary

Problems solved by technology

[0003] However, the process of producing metal zipper elements by stamping has the following shortcomings: first, some copper zipper elements with special shapes or irregular shapes cannot be realized by stamping; Rust has given birth to the realization of stainless steel zipper elements; however, due to the high hardness of stainless steel elements themselves, it is difficult to achieve production by stamping methods.