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

Inactive Publication Date: 2020-12-15
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the problems of uneven coating and difficult control of coating thickness in the prior art, and provides a method and device for spraying the surface of bonded NdFeB magnets, which solves the problem of easy oxidation of the surface of bonded NdFeB magnets. Rust problems; ensure uniform coating, improve dimensional accuracy; reduce coating loss, reduce costs, and facilitate control of coating thickness

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for spraying the surface of a bonded NdFeB magnet, comprising the following steps:

[0044] Step 1: Place several bonded NdFeB magnets on the plate 3 at equal intervals;

[0045] Step 2: Mix the epoxy resin paint and thinner according to the ratio of 1: (1.0-1.5) and stir evenly to form a spraying liquid;

[0046] Step 3: Press the mixed paint into the spray gun 1 through the booster pump 103, adjust the internal pressure of the spray gun 1 and the position of the spray gun 1 to form a uniform spray;

[0047] Step 4: Control the uniform movement of the spray gun 1, and control its moving track and working state, and spray the product 2 above the flat plate 3;

[0048] Step 5: The plate 3 is rotated several times, and step 4 is repeated after each rotation until the coating film thickness reaches the required thickness.

[0049]In the above technical scheme, the bonded NdFeB magnet is the product 2, and the product 2 is placed on the flat plate 3 at equal inte...

Embodiment 2

[0054] The technical solution of embodiment 2 is basically the same as the technical solution of embodiment 1, and its difference is: in step one, the distance between adjacent bonded NdFeB magnets is greater than the height of bonded NdFeB magnets, such The setting is beneficial to avoid mutual shielding between adjacent products 2 during the spraying process, thereby affecting the uniformity and dimensional accuracy of the coating.

Embodiment 3

[0056] Such as figure 1 , figure 2 In the shown embodiment 3, a bonded NdFeB magnet surface spraying device includes a spray gun 1 and a flat plate 3, the spray gun 1 is used to spray the product 2, the flat plate 3 is used to place the product 2, and the spray gun 1 is arranged on the flat plate Above 3, there is a distance H between the spray gun 1 and the flat plate 3. In this technical solution, the spray gun 1 is used to spray the product 2, and the flat plate 3 is used to place the product 2, wherein the spray gun 1 and the flat plate 3 are provided with The distance H is convenient for the spray gun 1 to spray the product 2, avoiding the direct contact between the spray gun 1 and the product 2 during the moving process; at the same time, by adjusting the internal parameters of the spray gun 1, the spraying liquid can be sprayed evenly to ensure the uniform coating on the product 2.

[0057] In addition, the plate 3 is set as a metal material with magnetic adsorption, ...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/00B05D1/02B05D7/14B05B12/08B05B12/12B05B9/04B05B13/02
CPCB05B9/0403B05B12/084B05B12/124B05B13/0228B05D1/002B05D1/02B05D7/14
Inventor 应晓东
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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