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A kind of manufacturing method of the rubber extrusion magnetic strip that improves suction force

A manufacturing method and magnetic strip technology, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of increased volume of anti-rust layer, high cost of rare earth, and inability to meet the requirements of different cross-sectional areas and shapes of products Questions such as requirements

Active Publication Date: 2017-04-05
广州新莱福磁材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention of publication number 101465188 discloses a flexible rare earth bonded magnet that is obtained by extrusion molding and applying a magnetic field orientation with high magnetic properties and good flexibility. It extends the magnetic properties of the flexible magnet system The space can meet the requirements of high-precision products on the magnetic properties and flexibility of magnets. The disadvantage is that the cost of rare earths to improve magnetic properties is high, and rare earths are strategic resources.
[0005] The utility model of the announcement number 202042306 relates to an anti-rust soft magnetic strip, which is characterized in that an anti-rust protective layer is provided on the surface of the soft magnetic strip, which can be a heat shrinkable tube, lacquer coating or plastic layer. A layer of anti-rust protective layer isolates the soft magnetic strip from direct contact with the outside air and substances, thereby protecting the soft magnetic strip and preventing rust. This utility model plays a role in maintaining magnetic properties. The disadvantage is that it cannot Enhance the magnetic strip suction, and the protective layer of the subsequent processing of this magnetic strip increases the volume of the final product
[0008] Publication No. 103465552 discloses a magnetic rubber strip and its production method. The magnetic rubber strip includes a metal strip, an intermediate rubber magnet and a protective cover. The disadvantage is that the metal strip limits the shape of the extruded magnetic strip, so the product cross section limited shape
[0010] A rubber extruded magnetic strip with improved suction in the present invention is to solve many shortcomings of the above prior art: the use of rare earth magnetic powder to improve the magnetic performance brings about an increase in cost; the antirust layer matched with plastic sleeves brings volume increase and suction The weakening of the magnetic strip; the improvement of the magnetic strip suction can not meet the requirements of different cross-sectional area and shape of the product

Method used

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  • A kind of manufacturing method of the rubber extrusion magnetic strip that improves suction force
  • A kind of manufacturing method of the rubber extrusion magnetic strip that improves suction force

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Put 10kg of same-sex ferrite magnetic powder, 1.2kg of chlorinated polyethylene, and 200g of additives in the internal mixer and stir evenly, then press to mix the rubber to about 140℃, and pour it out with a roller temperature of 70~100℃. Mix rubber for 5 minutes with a mill, and then use a crusher to break into rubber particles with a particle size of less than 10mm for use;

[0032] 2) Put 10kg of iron powder, 1.1kg of chlorinated polyethylene, and 200g of additives in the internal mixer and mix them evenly, press to mix the rubber to about 115℃, pour it out and use an open mixer with a roll temperature of 70~100℃. Glue for 3~5 minutes, then use a crusher to break into rubber particles with a particle size of less than 10mm for use;

[0033] 3) Put the pellets from step 1) and step 2) in the extruder at the same time for co-extrusion;

[0034] 4) Cooling and shaping;

[0035] 5) The final size of the product size adjusted during the above extrusion process is thickness 1...

Embodiment 2

[0039] 1) Put 10kg of neodymium iron boron powder, 1kg of chlorinated polyethylene, and 200g of additives into the internal mixer and stir evenly, then press to mix the rubber to about 110°C, and pour it out with a roll temperature of 50~60°C. Mix the rubber for 3 minutes, then use a crusher to crush it into rubber particles with a particle size of less than 10mm for use;

[0040] 2) Put 10kg of iron powder, 1.1kg of chlorinated polyethylene, and 200g of additives into the internal mixer and stir evenly, press to mix the rubber to about 115℃, and pour it out using an open mixer with a roller temperature of 70~100℃ Mix the rubber for 3~5 minutes, then use a crusher to crush it into rubber particles with a particle size of less than 10mm for use;

[0041] 3) Put the pellets from steps 1) and 2) in the extruder at the same time for co-extrusion;

[0042] 4) Cooling and shaping;

[0043] 5) The final size of the product size adjusted during the above extrusion process is 1.5mm in thickne...

Embodiment 3

[0047] 1) Put 10k, EVA 1.1kg, and 200g of the heterogeneous ferrite magnetic powder in the internal mixer and stir evenly, press to mix the rubber to about 110℃, and pour it out using an open mixer with a roll temperature of 50~60℃ Mix the rubber for 3 minutes, and then use a crusher to crush it into rubber particles with a particle size of less than 10mm for use;

[0048] 2) Put 10kg of iron ore concentrate, 1.1kg of EVA, and 200g of additives in an internal mixer, mix it evenly, press to mix the rubber to about 115℃, and pour out the rubber with an open mixer with a roller temperature of 70~100℃. 3~5 minutes, then use a crusher to crush into rubber particles with a particle size of less than 10mm for use;

[0049] 3) Put the pellets from steps 1) and 2) in the extruder at the same time for co-extrusion;

[0050] 4) Cooling and shaping;

[0051] 5) The final size of the product size adjusted during the above extrusion process is 1.5mm thick, 25.4mm wide, and the cross-sectional shap...

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Abstract

The invention discloses a manufacturing method for improving attraction of a rubber extrusion magnetic strip. According to the method, the magnetic strip is integrally formed through coextrusion and comprises at least two layers, one layer is a conventional permanent magnet layer, and the other layer is a soft magnetic layer which has the functions of transmitting magnetic lines of force, restraining leakage fluxes from diffusing outwards and improving utilization efficiency of magnetic properties; the thickness ratio of the permanent magnet layer to the soft magnetic layer is preferably chosen as two to one, so that the attraction of the magnetic strip can be better improved; preferably, iron concentrate powder is utilized to replace conventional ultrafine iron powder, and the weather resistance problem that the soft magnetic layer ultrafine iron powder is prone to rusting is solved. Compared with a rubber extrusion magnetic strip with the same size and shape and a single permanent magnet layer in the prior art, by means of the manufacturing method for improving the attraction of the rubber extrusion magnetic strip, the attraction is improved by 15%-30%, the environmental resources are saved, and meanwhile by means of the rubber extrusion magnetic strip, the requirements that the attraction is high, the shape is small and the quantity production is easy are met.

Description

Technical field [0001] The invention belongs to the field of magnetic materials, and in particular relates to the manufacture of a rubber extruded magnetic strip with improved suction. Background technique [0002] At present, my country’s rubber door seal magnetic stripe production volume ranks first in the world, and its types have gradually expanded from refrigerator door seals to disinfection cabinets, doors and windows, information signage racks, advertising and other fixed parts. The requirements for their shapes, magnetic poles and suction are different. It is composed of I-shaped, T-shaped, C-shaped magnetic strips or other special-shaped magnetic strips, and is flexible and bendable. [0003] With the development of rubber extruded magnetic strips, high-precision products have increased suction, reduced volume, and complicated cross-sectional area shapes, and higher requirements have been placed on product costs. [0004] In the past, one of the ways to increase the suction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/28C08L23/08C08K3/22C08K3/08C08K3/38B32B27/32B29C47/06
CPCB29C48/18B32B27/322C08K3/08C08K3/22C08K3/38C08K2003/0856C08K2003/2265C08L23/0853C08L23/286
Inventor 汪小明王志英吴隆章
Owner 广州新莱福磁材有限公司