Grinding device for scale-like metal powder
A metal powder, flake-like technology, applied in the field of metal powder rolling devices, can solve the problems of less impact points, lower proportion of flat powder, large impact force, etc., and achieves the effects of fast processing, stable quality and long service life
Active Publication Date: 2013-12-04
江苏宝纳电磁新材料有限公司
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Problems solved by technology
Its disadvantages are: the impact between the ball and the ball is a point-to-point impact, and the impact points are few and the impact force is large.
With the increase of ball milling time, the thickness of the powder decreases, and the ability to withstand impact decreases, and the violent impact will cause the flake powder to become fragments, resulting in a decrease in the proportion of flat powder
Method used
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Embodiment 1
[0030] Ethanol is used as the dispersion medium, the volume ratio of the dispersion medium to the alloy powder is 6:1, and the amount of anti-rust and lubricant is 0.2% by mass of the metal powder. The inner diameter of the active roller 1 of the patented device of the present invention is Ф200mm; The internal length of the drum 1 is 1 mm to 5 mm shorter. The ratio of the mass of the primary roller 2, the secondary roller 3, the roller 4, the first roller 6, the second roller 7, and the third roller 8 to the mass of the alloy powder is 15:1. The linear velocity of the inner wall of the driving drum 1 is 300 m / min. After 60 hours of continuous operation, samples were taken. The samples have an average thickness of 0.70 μm and an aspect ratio of about 650. Measured with a laser particle size tester, the average particle diameter D50 is 65 μm.
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Abstract
A grinding device for scale-like metal powder comprises a driving rolling drum, a primary grinding drum, a secondary grinding drum, a grinding roller and a seal assembly, wherein the driving rolling drum is in a drum structure with one end sealed, the seal assembly seals the primary grinding drum, the secondary grinding drum and the grinding roller in the driving rolling drum, the lengths of the primary grinding drum, the secondary grinding drum and the grinding roller are slightly smaller than that of an inner cavity formed by the driving rolling drum and the seal assembly, the primary grinding drum is located in the driving rolling drum, the outer diameter bottom of the primary grinding drum contacts with the inner diameter bottom of the driving rolling drum, the secondary grinding drum is located in the primary grinding drum, the outer diameter bottom of the secondary grinding drum contacts with the inner diameter bottom of the primary grinding drum, the grinding roller is located in the secondary grinding drum, and the outer diameter bottom of the grinding roller contacts with the inner diameter bottom of the secondary grinding drum. All parts rotate by mutual friction, the gravity forms grinding force, and the difference of rotational linear speed forms rolling. The grinding device has the advantages that the processed scale-like micro powder is high in flattening ratio and stable in quality, the processing is quick and efficient, and the service life of the grinding device is long.
Description
technical field [0001] The invention relates to a metal powder rolling device, in particular to a scaly metal powder rolling device. The flaky metal soft magnetic micro-powder made by the device of the present invention is mainly used to make the magnetic raw material of flexible electromagnetic interference wave absorbing magnetic sheet, and this flexible magnetic sheet preferably adopts the electronic tag and EMC (electromagnetic magnetic field) in RFID (radio frequency identification: Radio Frequency Identification) technology. Compatibility: Electromagnetic Compatibility or EMI is used in anti-electromagnetic interference: Electromagnetic Interference), etc. Background technique [0002] Radio frequency identification technology RFID, as the core link to realize the basis of item identification in the Internet of Things, must use flexible magnetic sheets. It is made of very thin (less than 1μm) scaly metal powder, which can absorb high-frequency electromagnetic interfer...
Claims
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IPC IPC(8): B22F9/04
Inventor 戴少银阳开新瞿卫俊
Owner 江苏宝纳电磁新材料有限公司
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