A device for the entry and exit of protective gas on both sides of the forming chamber of metal 3D printing equipment

Abstract

The present invention provides a device for protecting gas in and out of the metal 3D printing device on both sides of the warehouse.The output and air intake devices of the internal work warehouse of the internal metal selection equipment are simplehole or rectangular device.The general problem is that the airflow generated by air intakes during the laser sintering powder is difficult to blow away the black smoke and metal steam plasma that interacts with the interaction of the pink, which makes the laser's power loss greater and causes melting meltingIrregular pool shapes seriously affect the molding quality and molding accuracy of the molding parts.Or the black smoke near the air inlet is scattered on the powder near the outlet and affects the printing work.The present invention is mainly to design a specific device to make the air flow form a stable layer and effectively blow away the black smoke and metal steam plasma produced by the laser sintering powder.The quality and accuracy of the molding parts make the density of the molding part of nearly 100 %.

Description

Technical field [0001] The invention relates to a device for protecting gas in and out of the forming chamber of a metal 3D printing equipment, which mainly solves the problem of black smoke generated during laser sintering of powder during laser melting and forming in selected areas and serious loss of laser by metal plasma, thereby enabling The utilization rate of laser energy is increased by about 10%-15%, and the quality and precision of the molded part are effectively improved, so that the density of the molded part is close to 100%. Background technique [0002] Today's market environment is undergoing tremendous changes. On the one hand, consumer demand is increasingly personalized and diversified; on the other hand, product manufacturers are focusing on fierce competition in the global market. Faced with such a rapidly changing and unpredictable buyer's market, manufacturers must not only quickly design products that meet people's consumer needs, but also must quickly pro...

AI Technical Summary

Problems solved by technology

Problem 1: During the molding process, because the laser sintering powder layer will generate a large amount of black smoke and metal vapor plasma, resulting in a large attenuation of laser power, resulting in poor quality of molded parts, poor dimensional accuracy, etc.

Some even directly affect the quality of single-layer powder melting, making it difficult to continue the printing process

[0006] Question 2: Even if the protective gas is enough to blow away the black smoke and metal vapor plasma during the molding process without affecting the power of the laser, but because some equipment has a relatively large printing format, in order to avoid excessive stress on the entire surface during laser scanning, you will generally choose Diagonal scanning or checkerboard scanning, at this time, the black smoke and large particles near the air outlet will be blown and scattered on the surface of the workpiece near the air suction port, thus affecting the powder spreading and sintering quality of the next layer

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