A magnetic field assisted powder distribution device and method for filling a cavity with magnetic powder

CN117282963BActive Publication Date: 2026-07-24HUAQIAO UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAQIAO UNIVERSITY
Filing Date
2023-09-27
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In the powder metallurgy process, insufficient density and uniformity of powder filling in the cavity of complex-shaped products can lead to problems such as uneven density distribution, insufficient strength, cracks, and delamination.

Method used

A magnetic field-assisted powder distribution device is adopted. By setting energized coils at the bottom and around the cavity to generate a magnetic field, the flowability of the powder is controlled. The magnetic field force is used to enhance the compactness and uniformity of the powder in the cavity. This includes the translation of the material shoe and the adjustment of the magnetic field to achieve directional filling of the powder.

Benefits of technology

It improves the density and uniformity of powder in the mold cavity, thus improving product quality without affecting production efficiency.

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Abstract

The application belongs to the technical field of powder forming equipment, and particularly discloses a magnetic field assisted powder distribution device and method for filling a cavity with magnetic powder, wherein the magnetic field assisted powder distribution device comprises a material shoe, a traction device, a slide rail device, a cavity, a first power coil, a second power coil, a motor assembly and a power supply system; the material shoe is in seamless contact with a powder distribution platform, and the material shoe performs powder distribution work by translating on the powder distribution platform; the traction device connects the material shoe and the slide rail to realize power transmission; the slide rail device is internally provided with a rope and a sliding block, the sliding block is connected with the rope and hinged with the traction device; the first power coil is arranged at the bottom of the cavity to increase the downward pressure of powder filling; the second power coil is uniformly arranged along the side wall of the cavity with the central axis of the cavity as a rotating shaft to form a radial magnetic stirring effect and promote particle rearrangement. The powder distribution method is simple and easy to implement, the added magnetic field does not affect the production efficiency, and meanwhile, the quality of the powder compression molded product is improved.
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