A kind of method for removing drape of metal powder injection molding green body

Abstract

The invention discloses a method for removing the flashing of a metal powder injection molding green body. The method comprises the following steps that the green body is jetted by using compressed cold air flow, so that the green body is cooled and embrittled instantly, and the brittle green body falls off under the effect of jetting airflow impact force. According to the method, the flashing ofthe MIM green body can be quickly and efficiently removed, the production efficiency and the processing yield are greatly improved, manual factors can be eliminated, automation is realized, and the embrittlement of the green body also improves the degreasing and sintering efficiencies of the rear section.

Description

technical field [0001] The present invention relates to a method for removing the edge of a metal powder injection molded green body. Background technique [0002] Metal Powder Injection Molding (abbreviated as MIM) is a new type of powder metallurgy near-net forming technology derived from the plastic injection molding industry. As we all know, plastic injection molding technology produces products of various complex shapes at a low price, but the strength of plastic products is not high. High, in order to improve its performance, metal or ceramic powder can be added to plastics to obtain products with higher strength and good wear resistance. In recent years, this idea has evolved to maximize the content of solid particles and subsequently During the sintering process, the binder is completely removed and the formed body is densified. This new powder metallurgy forming method is called metal injection molding. [0003] The green body is obtained after the MIM process is ...

AI Technical Summary

Problems solved by technology

[0006] 1. The quality of deburring is difficult to control and unstable. Judging by operating experience, the technical requirements for operators are relatively high and it is easy to miss or over-repair;

[0007] 2. The production efficiency is low, only one product can be processed at a time, the labor intensity is high, and the production cost is high;

[0008] 3. The structural strength of the green parts is relatively fragile, especially for small-sized, thin-thick green parts with a relatively complex structure. Manual removal of burrs and burrs requires manual handling, which may easily lead to deformation or breakage of the green parts;

[0009] 4. Manually removing the burrs and burrs of MIM green parts will easily lead to stress concentration in the repaired parts, resulting in defects in mechanical properties, and eventually lead to the scrapping of sintered products