Powder supply system and powder supply method for laser selective melting apparatus

By designing a powder supply system in the laser selective melting equipment, real-time switching of powder type and bidirectional powder scraping were achieved, solving the problem of low efficiency of powder supply systems in multi-material processing, improving powder supply and recovery efficiency, and ensuring powder purity and processing quality.

CN120205843BActive Publication Date: 2026-06-12NANJING ZHONGKE RAYCHAM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING ZHONGKE RAYCHAM TECH
Filing Date
2025-04-08
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing laser selective melting equipment suffers from problems such as low powder supply system efficiency and difficulty in separating mixed powders in multi-material processing, which affects processing efficiency and powder purity.

Method used

A powder supply system was designed, including a powder spreading bin, a scraper component, a forming cylinder, a powder supply component, and a powder return bin assembly. The system uses a controller to achieve real-time switching of powder types and bidirectional powder scraping, ensuring that the powder is recycled to the corresponding powder return bin, thereby improving powder supply and return efficiency.

Benefits of technology

It achieves efficient powder supply and recovery in multi-material processing, improves processing efficiency and powder purity, and ensures powder reusability and processing quality.

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Abstract

This invention relates to the field of additive manufacturing technology, specifically to a powder supply system and method for laser selective melting equipment, comprising: a powder spreading bin, the interior of which is configured with a predetermined protective atmosphere to form an environment for laser sintering powder, the bottom of the powder spreading bin having a powder scraping plane; and a scraper component connected to a track on the inner wall of the powder spreading bin. Through real-time linkage between a movable powder return bin and a powder supply bin, the powder return bin can be switched synchronously according to the current powder type. Simultaneously, the scraper component can perform bidirectional powder scraping. When scraping powder bidirectionally, the position of the powder return bin can be dynamically adjusted according to the scraper direction to ensure that the falling powder enters the corresponding powder return bin, preventing powder spillage. The powder supply and return efficiency is high, the powder is highly pure, and it can be directly recycled and reused. Furthermore, the scraper component is designed to temporarily store powder, enabling bidirectional powder scraping during a single powder fall, thus improving processing efficiency.
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