A metal 3D printed adjustable wind field structure

By introducing an adjustable airflow structure into metal 3D printing equipment, the airflow direction and volume can be dynamically adjusted, solving the problem of dust accumulation, improving the surface quality and mechanical properties of printed samples, and reducing production costs.

CN119609174BActive Publication Date: 2026-05-26ZHEJIANG UNIV HIGH-END EQUIP RES INST
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Patent Information

Application Number
CN202411770095.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-04
Publication Date
2026-05-26
Estimated Expiration
2044-12-04

AI Technical Summary

Technical Problem

Existing metal 3D printing equipment's airflow structure cannot effectively handle dust within the printing cavity, leading to a reduction in the surface quality and mechanical properties of the printed samples.

Method used

It adopts an adjustable airflow structure, including a main air outlet, a secondary air outlet, an auxiliary air outlet, and an air intake. Combined with a smoke concentration sensor and a drive motor, it dynamically adjusts the airflow direction and volume to form an adaptive airflow operation mode, cleaning up dust and splashes in the printing chamber.

Benefits of technology

The printing atmosphere inside the printing cavity was optimized, reducing the interference of dust accumulation on the surface quality and mechanical properties of the sample, thus improving product quality and reducing manufacturing costs.

✦ Generated by Eureka AI based on patent content.
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Abstract

This invention discloses an adjustable airflow structure for metal 3D printing. A main air outlet is fixed to the top of one side of the inner wall of the printing cavity, with its outlet lower than the laser galvanometer. A secondary air outlet is located on the same side of the inner wall of the printing cavity as the main air outlet, with its outlet parallel to the outlet of the main air outlet and at a 180° angle to the top of the printing cavity. An auxiliary air outlet's outlet is mirror-image of the main air outlet's outlet along the central axis of the printing cavity. An air intake and auxiliary air outlet are located on the same side of the inner wall of the printing cavity, with their outlets parallel. The outlet of the secondary air outlet is vertically higher than the inlet of the air intake. A substrate powder bed is installed at the bottom center of the printing cavity. By coordinating the main and secondary air outlets with the air intake, different airflow operation modes are formed, optimizing the printing atmosphere within the printing cavity and avoiding the dead zones caused by fixed airflow paths in existing airflow structures.
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