Novel rubber magnet and method for making same

A rubber magnet and system technology, applied in the direction of organic material/organic magnetic material magnetism, etc., can solve the problems such as the inability to obtain the shape of the rubber magnet, the large molding pressure, the easy fracture and deformation of the product, etc.

Inactive Publication Date: 2008-04-09
GUANGZHOU GOLDENSOUTH PLASTIC MAGNET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the rubber magnets produced by this method cannot be made into shapes other than plates and wires, and cannot meet the market's requirements for three-dimensional shapes such as rings.
[0004] Rigid mag...

Method used

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  • Novel rubber magnet and method for making same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The proportion (mass ratio) of the magnet formula is 95% of quick-quenched NdFeB magnetic powder (brand: XQP16-10), 3% of nitrile rubber, 0.1% of coupling agent (such as KH-550), other additives such as lubricant, Plasticizers, vulcanizing agents, etc. accounted for 1.9%. The above raw materials are uniformly mixed in a mixing device such as a mixer, a high mixer, a screw mixer, an open mill, a calender or an internal mixer to obtain a billet. Fill the billet into a Φ50mm×Φ45×50mm mold and heat it to 150°C for 30 minutes, then shape it on a hydraulic press at a pressure of 5t / cm2, keep it warm at 150°C for 20 minutes, and demould it after cooling to obtain the final product. The detected magnet density is 5.7g / cm3, and the magnetic performance is 8.5MGO.

Embodiment 2

[0056] The proportion (mass ratio) of the magnet formula is 41% of quick-quenched NdFeB magnetic powder (brand: XQP16-10), 51% of strontium ferrite magnetic powder, 6% of nitrile rubber, 0.1% of coupling agent (such as KH-550), Other additives such as lubricants, plasticizers, vulcanizing agents, etc. accounted for 1.9%. The above raw materials are uniformly mixed in a mixing device such as a mixer, a high mixer, a screw mixer, an open mill, a calender or an internal mixer to obtain a billet. Fill the billet into a mold of Φ87mm×Φ81×2mm and heat it to 180°C for 20 minutes, then shape it on a vulcanizer under a pressure of 3t / cm2, and demould it after cooling to obtain the final product. The detected magnet density is 4.67g / cm3, and the magnetic property is 4.1MGO.

Embodiment 3

[0058] The proportion (mass ratio) of the magnet formula is HDDR anisotropic NdFeB magnetic powder (brand: 4013H) 95%, nitrile rubber 3%, coupling agent 0.1% (such as KH-550), other additives such as lubricants, Plasticizers, vulcanizing agents, etc. accounted for 1.9%. The above raw materials are uniformly mixed in a mixing device such as a mixer, a high mixer, a screw mixer, an open mill, a calender or an internal mixer to obtain pellets. Fill the pellets into a Φ20mm×3mm mold and heat it to 165°C for 20 minutes, then shape it on a hydraulic press with a pressure of 1t / cm2, and apply an axially oriented electromagnetic field of 2.8T at the same time, keep it at 150°C for 20 minutes, and after cooling Demoulding to obtain the final product. The detected magnet density is 5.7g / cm3, and the magnetic property is 13MGO.

[0059] Through the novel rubber magnet and its preparation method provided by the embodiments of the present invention, a novel rubber magnet is prepared,...

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Abstract

The invention discloses a preparation method of a novel rubber magnet. The method comprises the steps: magnet powder, rubber and additive are mixed to make compound according to a certain proportion, wherein, the proportion of the magnet powder taking up the weight of the compound is not less than 90 percent. The compound is put into a mixing device to be evenly mixed to make magnet powder compound. The powder compound is put into dies and is heated together with the dies to form molding objects under the pressurized condition of a pressure device. Furthermore, the heating temperature is kept between 120 DEG C and 200 DEG C and the pressure under the pressurized condition is 0.5 t/cm2-5t/cm2. The products are finally made by demoulding the molding objects. The invention discloses a novel rubber magnet, and the magnet content of the novel rubber magnet is up to over 90 percent.

Description

technical field [0001] The invention relates to the application field of magnets, in particular to a novel rubber magnet and a preparation method thereof. Background technique [0002] For flexible magnets made in the past, first, the magnetic powder and rubber are mixed under pressure to obtain a mixture with a certain viscosity, and then calendered or extruded to make plates with uniform thickness or strips with different cross-sectional shapes, and vulcanized as required to obtain rubber. Flexible magnets. [0003] But the rubber magnet that this method is made at present can't make the shape except plate, wire rod, can't satisfy the requirement of the three-dimensional shape such as circular ring in the market. [0004] Rigid magnets prepared by molding, injection molding and other methods can obtain three-dimensional shapes such as rings, but they do not have the flexibility of rubber magnets. It breaks easily, deforms, and is almost impossible to produce. Contents ...

Claims

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Application Information

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IPC IPC(8): C08L23/28C08L23/16C08L23/22C08L9/00C08L75/04C08L11/00C08L81/00C08L83/04C08K3/22B29C43/00H01F1/42
Inventor 汪小明戴雨兰杨应彬罗毅舒杰华李炜彬
Owner GUANGZHOU GOLDENSOUTH PLASTIC MAGNET
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