Powder Circulation Solutions Enable Users to Achieve Efficient Powder Flow

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Time：2025-12-18

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As metal additive manufacturing technology is increasingly applied to large-size, complex parts and mass production, traditional powder management methods are no longer sufficient to meet the higher demands of modern manufacturing for quality stability and production efficiency. Based on a deep understanding of industry trends and accumulated technological expertise, LiM Laser has developed a comprehensive powder circulation system to achieve efficient, safe, and closed-loop powder flow during metal 3D printing.

The LiM Laser powder circulation system encompasses two core solutions: fully automated powder circulation and separate powder circulation, combined with a powder cleaning system to form a complete closed-loop powder handling system, collectively building an efficient and intelligent powder flow system for metal 3D printing.

Fully Automated Powder Circulation System

This highly integrated system combines powder supply, recovery, and sieving into one unit. Independent of the main unit, it connects to the main unit via piping, allowing a single unit to handle powder flow during the printing process, providing comprehensive support for continuous production of large-size equipment.

Compact Structure and Rational Layout

The fully automatic powder circulation system features a compact design, allowing for spatial integration with the main equipment. This significantly reduces space requirements in the production area, optimizes the production layout, and frees up factory space.

Integrated Functions and Efficient Supply

The system incorporates three main functional modules: powder feeding, recovery, and sieving, specifically addressing powder flow issues during the operation of large-size metal 3D printing equipment. Furthermore, the system is equipped with pressure sensors, oxygen content sensors, material level sensors, and valve position sensors to monitor internal operating status in real time, achieving one-stop intelligent control and automated management.

Simple Operation and Reliable Performance

Equipped with an intelligent operating system, operators can easily start the process with a single button. The system monitors its own and the equipment's operating status in real time, automatically completing powder feeding, recovery, and sieving.

The system automatically delivers metal powder to the main equipment, ensuring a continuous powder supply during printing. This effectively prevents printing interruptions due to insufficient powder supply, ensuring the stability and consistency of the formed product quality.

In addition, the system automatically recovers and sieves excess powder, removing large-particle powder and preventing foreign matter from mixing with the metal powder. The sieved powder can be reused, significantly improving powder utilization and reducing overall costs.

The system has a preset warning level to ensure equipment operation for more than one hour. When the remaining powder reaches the preset warning level, an automatic alarm is triggered. When the powder replenishment function is activated, a portion of the recovery module will be dedicated to replenishment, allowing for manual replenishment without interruption of printing. The replenishment function can be turned off after completion.

Safe and Environmentally Friendly, Widely Compatible

To ensure safety throughout the entire process, all actions of the LiM Laser fully automatic powder circulation system are performed in an inert gas protected environment. This maximizes long-term powder quality stability, preventing powder oxidation and deterioration from affecting part forming quality. Furthermore, it effectively prevents the risk of combustion and explosion from dust generated during powder cleaning, safeguarding production safety.

The system has excellent versatility and is compatible with multiple LiM-X series metal 3D printing equipment.

Split-type Powder Circulation System

The split-type powder circulation solution is compatible with all LiM-X series equipment. It consists of a powder pump, powder collection tank, high-efficiency sieving system, and connecting pipelines. Each tank is equipped with sensors for detection and alerts.

The system boasts advantages such as small footprint, high flexibility, strong versatility, and high conveying efficiency, supporting one-button powder pumping operation.
Powder suction operations are conducted in an argon-protected environment, equipped with oxygen content monitoring and gas washing functions.
Powder and personnel are isolated, improving safety and automation levels, extending unattended operation time, and resulting in high efficiency and low failure rate.

Powder Cleaning System

As a crucial component of the post-processing stage, powder cleaning directly affects product forming quality and powder recovery efficiency. The LiM-PCE series powder cleaning system works efficiently with the main equipment and powder circulation system to form a professional and systematic closed-loop powder handling system.

The LiM-PCE800-H1600, LiM-PCE1300-H1400, and LiM-PCE400-H500 toner cleaning equipment utilizes servo control to achieve workpiece rotation and flipping. A vibration system mounted on the platform assists in cleaning, effectively removing internal powder that is difficult to reach manually. Equipped with an air gun component, it can achieve comprehensive cleaning of complex parts, achieving high-quality toner cleaning results. The cleaned powder falls into a toner bin for collection.

For cleaning workpieces printed on large-size equipment, LiM Laser offers the LiM-PCE1500 toner cleaning equipment. It has a maximum load size of 1500mm x 1500mm x 1500mm and a maximum part flipping weight of 15000kg, meeting the toner cleaning needs of most workpieces. It uses an electric flatbed cart for loading and unloading, ensuring precise positioning inside the equipment and facilitating installation and fixation. Servo-linked control of the X and Y axes controls workpiece rotation, and a pneumatic vibrator assists in knocking and cleaning the powder. The cleaned powder automatically flows to an external transfer tank in an argon-protected environment for easy recycling.

This powder cleaning equipment is compatible with large-size machines such as the LiM-X800/800H, LiM-X1300H, and LiM-X1500H, providing users with a comprehensive and efficient powder removal solution.

Accelerating intelligent manufacturing and boosting industrial upgrading. LiM Laser has always been market-oriented, committed to providing customized and systematic overall solutions for metal 3D printing to users in various industries. The coordinated operation of the powder circulation and cleaning system not only improves the overall efficiency of the equipment and powder utilization rate, but also brings users a safer and smarter production experience. In the future, we will continue to unleash our innovative potential, continuously drive technological iteration and product innovation, help manufacturing enterprises improve quality and efficiency, and jointly create a smart future.

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