Method for removing flashing of metal powder injection molding green body

An injection molding and metal powder technology, which is applied in the field of removing metal powder injection molding green body, can solve the problems of high labor intensity, low production efficiency, high production cost, etc., and achieve the improvement of processing yield, production efficiency, and process The effect of improving efficiency

Active Publication Date: 2018-11-23
DONGGUAN HUAJING POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0051] Example 1:

[0052] 1. Put the frontal green billet after cutting the nozzle on the conveyor belt fixture for fixing. The fixed position of the fixture and the green body is required to be free of front.

[0053] 2. The conveyor belt clamp enters the liquid nitrogen jet spraying chamber and reaches the predetermined spraying position. The nozzle is 15cm away from the product. The spray gun sprays the green body. The spray time is 1 second, the nozzle spray pressure is 1Mpa, and the green body embrittlement temperature is -38℃. The green body instantaneously condenses, driven by the jet air flow, and the embrittled green body drape off the front under the action of the jet air flow.

[0054] 3. The green body after embrittlement and removal of the front is kept in an unventilated environment for 6 hours at room temperature, and then enters the next degreasing process.

[0055] Example 1:

[0056] Place the green body with a front cover after the nozzle on the conveyor belt fixtu...

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PUM

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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 ...

Claims

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Application Information

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IPC IPC(8): B22F3/22B22F3/24
CPCB22F3/225B22F3/24B22F2003/247
Inventor 张柯谢庆丰庞前列张海洋张维周国荣黎小莉
Owner DONGGUAN HUAJING POWDER METALLURGY
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