Excessive flash removing device and technology of MIM (Metal Injection Molding) green body

Abstract

The invention provides an excessive flash removing device and technology of an MIM (Metal Injection Molding) green body. The device comprises a excessive flash removing mechanism, wherein the excessive flash removing mechanism comprises an air compressing system, a refrigerated air dryer, an ice scrapping system and a feeding and injecting pipe, wherein the air compressing system is connected to the refrigerated air dryer; the refrigerated air dryer and the ice scrapping system are connected to the feeding and injecting pipe through pipelines; the refrigerated air dryer is used for refrigerating and drying compressed air to obtain refrigerated dried high-pressure air; the ice scrapping system is used for scrapping dry ice blocks into dry ice particles or dry ice powder, and the dry ice particles or the dry ice powder can be mixed with the refrigerated dried high-pressure air through the pipelines and then are injected at a high speed through the feeding and injecting pipe. Therefore, the force produced by volume expansion of the dry ice particles during being sublimated from a solid state into a gaseous state and the impacting force produced by the dry ice particles along with high-speed airflow are utilized to remove excessive flashes and burrs.

Description

technical field [0001] The invention relates to a device and a process for removing the rim of an MIM green body. Background technique [0002] In the 1990s, the average annual sales growth rate of MIM (powder metallurgy) products reached 22%, and it is expected that the entire market will continue to increase at a rate of 20% to 30% in the next ten years. With the continuous improvement of the process, the superiority of metal injection molding technology is gradually showing, and will be accepted by more and more industries and customers, and the market share it brings is also increasing sharply. Due to the huge market potential, many venture capitals have also begun to get involved in the MIM industry. It can be predicted that MIM will develop into one of the most promising component manufacturing technologies in the 21st century. The rapid development and application of MIM technology must correspondingly improve the production yield and efficiency. The application of...

AI Technical Summary

Problems solved by technology

The application of MIM technology in the forming process of the green body will inevitably produce various burrs and burrs due to the manufacturing accuracy of the mold, assembly clearance, structural design and other reasons, as well as the burrs and burrs generated when the formed green body is removed at the nozzle; These burrs and burrs have different shapes and sizes, different thicknesses, and the structural strength of the green body is weak and easy to deform. It is difficult to realize a mechanized and automated process for removing burrs and burrs.

At present, the traditional green body burring and burr removal in the industry are mainly done manually, which is not only inefficient but also difficult to guarantee the yield rate and unstable; it seriously restricts the development and application of MIM technology

At present, manual operation is the most important method to remove the burrs and burrs of MIM green parts. The tools used mainly include brushes, files, scrapers, etc., and there are four shortcomings: 1) The quality of deburring is difficult to control , Unstable, judging by operating experience, the operator has high technical requirements and is prone to omissions and over-repairs; 2) The production efficiency is not high, only one product can be processed at a time, the labor intensity is high, and the production cost is high; 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; 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 the sintered product

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