Method and device for spraying surface of bonded neodymium-iron-boron magnet

A surface spraying and NdFeB technology, which is applied to the surface coating liquid device, liquid injection device, spraying device, etc., can solve the problem that the surface of bonded NdFeB magnet is easy to oxidize and rust, and the thickness of the coating is difficult to control. problems, to achieve the effect of improving product coating quality, avoiding oxidation and rust, and improving coating quality
CN112076961AInactive Publication Date: 2020-12-15HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENGDIAN GRP DMEGC MAGNETICS CO LTD
Publication Date
2020-12-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method and a device for spraying the surface of a bonded neodymium-iron-boron magnet. The method comprises the following steps: 1, placing a plurality of bonded neodymium-iron-boron magnets on a flat plate at equal intervals; 2, preparing spraying liquid, specifically, mixing epoxy resin paint and a diluent in proportion and stirring uniformly to form the spraying liquid;3, pressing the spraying liquid into a spray gun to form uniform spray; 4, controlling the spray gun to uniformly move, and spraying a product above the flat plate; and 5, rotating the flat plate bymultiple times, and repeating the step 4 after each time of rotation till the coating film reaches the needed thickness. A bonded neodymium-iron-boron magnet surface spraying device comprises the spray gun and the flat plate. According to the method and the device for spraying the surface of the bonded neodymium-iron-boron magnet, the problem that the surface of the bonded neodymium-iron-boron magnet is prone to oxidation and rusting is solved. the coating uniformity is ensured, and the size precision is improved; and the loss of the coating is reduced, the cost is reduced, and the coating thickness is convenient to control.
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Description

technical field

[0001] The invention relates to the field of magnet preparation, in particular to a method and device for spraying the surface of a bonded NdFeB magnet. Background technique

[0002] NdFeB magnets have excellent magnetic properties and high cost performance, and are widely used in technical fields such as electronics, motors and communications. The nature of bonded NdFeB magnets is very active, and its surface anti-corrosion performance is low. After oxidation and rust, its magnetic properties will be seriously affected, which greatly limits its service life and application fields. Therefore, surface treatment is generally performed on bonded NdFeB magnets to improve anti-corrosion performance. One of the surface treatment processes is spraying, but when spraying, the thickness and uniformity of the paint layer are affected by the spraying distance, spraying angle, and spraying time. Influenced by various factors such as product structure, there are problems...

Claims

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