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Permanent magnet ferrite material for injection molding and manufacture method thereof

A permanent magnet ferrite, injection molding technology, applied in the direction of magnetic materials, magnetic objects, organic materials/organic magnetic materials, etc., can solve the problems of fragile, flexible, difficult to meet the use requirements, unsuitable, etc., to achieve Durable use, optimized tensile strength and elongation, good weather resistance

Active Publication Date: 2013-05-08
BEIKUANG MAGNETS FUYANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the injection-molded magnet with nylon as the main component is generally rigid at room temperature and has almost no flexibility, it becomes a brittle material. The device used as a position sensor in the cylinder requires frequent reciprocating movements in the cylinder. The brittle material is easy to Therefore, its flexibility is difficult to meet the requirements of the position sensor in the cylinder of the pneumatic components, and it is not suitable for the use of the magnetic device of the position sensor in the cylinder. Therefore, it is required to develop a suitable injection molding, which can be obtained Injection pellets for flexible magnets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a flexible permanent magnet ferrite material, which can be used to manufacture flexible magnet injection pellets, and has good oil resistance, thermal stability, flexibility and fluidity. The flexible permanent magnet ferrite material can be made into injection pellets, and then used for injection molding to make a position sensor.

[0026] The flexible permanent ferrite material is composed of 80-92% of permanent ferrite, 3-6% of rubber, 2.5-10% of plasticizer and 0.1-3% of other auxiliary agents in terms of mass percentage; The permanent magnet ferrite adopts strontium ferrite SrO.6Fe 2 o 3 ; Rubber includes main rubber and auxiliary rubber, and the content of main rubber accounts for 55-95% of the total rubber mass.

[0027] The rubber used in the above-mentioned flexible permanent ferrite material is required to be oil resistant, and the main rubber is chlorinated polyethylene (CPE) and / or polyvinyl chloride (PVC); when the main rubber is ...

Embodiment 2

[0041] This embodiment provides a flexible permanent magnet ferrite material, which can be used to manufacture flexible magnet injection pellets, and has good oil resistance, thermal stability, flexibility and fluidity. The flexible permanent magnet ferrite material can be made into injection pellets, and then used for injection molding to make a position sensor.

[0042] The manufacturing method of the flexible permanent ferrite material is as follows, including:

[0043] In terms of mass fraction, firstly, 80 parts of polyvinyl chloride powder with an average degree of polymerization of 1300, 5 parts of calcium-zinc stabilizer, 100 parts of dioctyl phthalate (DOP), 20 parts of trimellitic acid tris Add octyl ester (TOTM), 5 parts of dioctyl adipate (DOA), and 25 parts of epoxidized soybean oil into a Z-type kneader for 20 minutes at a temperature of 120 ° C for plasticization;

[0044] Then put the plasticized polyvinyl chloride powder together with 18 parts of powdered nit...

Embodiment 3

[0047] This embodiment provides a flexible permanent magnet ferrite material, which can be used to manufacture flexible magnet injection pellets, and has good oil resistance, thermal stability, flexibility and fluidity. The flexible permanent magnet ferrite material can be made into injection pellets, and then used for injection molding to make a position sensor.

[0048] The manufacturing method of the flexible permanent ferrite material is as follows, including:

[0049] In terms of mass fraction, first add 68 parts of polyvinyl chloride powder with an average degree of polymerization of 1800, 5 parts of calcium-zinc stabilizer and 70 parts of dioctyl phthalate (DOP) into the Z-type kneader Plasticize at a temperature of 120°C, then add 25 parts of trioctyl trimellitate (TOTM), 5 parts of polyester plasticizer, and 25 parts of epoxy soybean oil until the polyvinyl chloride is fully plasticized;

[0050] Then the plasticized polyvinyl chloride powder is mixed with 30 parts o...

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PUM

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Abstract

The invention discloses a permanent magnet ferrite material for injection molding and a manufacture method thereof, belonging to the field of permanent magnet ferrite materials. The granule is compounded by the following components in percentage by mass: 80-92% of permanent magnet ferrite, 3-6% of rubber, 2.5-10% of plasticizer and 0.1-3% of accessory ingredient, wherein the permanent magnet ferrite adopts iron strontium oxide Sr0.6Fe2O3; and the rubber comprises main rubber and assistant rubber, wherein the main rubber accounts for 55-95% of the total mass of the rubber. The iron strontium oxide Sr0.6Fe2O3 serves as the permanent magnet ferrite, and the permanent magnet ferrite, the rubber, the plasticizer and the accessory ingredient are compounded into a flexible permanent magnet ferrite material. The material can be manufactured into flexible injection granules and can be subjected to injection molding to manufacture a position sensor; the manufactured position sensor is a flexible sensor with good flexibility; and compared with the traditional rigid position sensor with poor flexibility, which is made of nylon injection particles, the position sensor is durable and convenientand has low cost.

Description

technical field [0001] The invention relates to the field of permanent magnet ferrite materials, in particular to a flexible permanent magnet ferrite material for injection molding and a manufacturing method thereof. Background technique [0002] Among pneumatic components, there is a device used as a position sensor in an oil cylinder. The position sensor uses bonded ferrite magnetic material. Due to the frequent reciprocating movement of the cylinder and the adaptability to various temperature working environments, the magnetic sensor is required to have oil resistance and good flexibility. [0003] Magnetic material injection molding is a processing method in which the particles obtained by mixing plastic or rubber and magnetic powder are plasticized in the heating barrel of the injection molding machine, and then injected into the cavity of a closed mold by a plunger or a reciprocating screw to form a product. This method can process products with complex shapes, preci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/42H01F1/117B29B9/00
Inventor 阎春山何双珍李亚峰王峰
Owner BEIKUANG MAGNETS FUYANG CO LTD