Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

technology for pretreat bonded Nd-Fe-B magnetic pow

A pretreatment, neodymium iron boron technology, applied in the direction of magnetic materials, magnetic objects, metal processing equipment, etc., can solve the problems that magnetic powder cannot be filled, affect product size accuracy and performance consistency, and uneven filling, so as to improve flow stability, ensure dimensional accuracy and performance consistency, and improve the loose-to-load ratio

Inactive Publication Date: 2019-01-25
HENGDIAN GRP DMEGC MAGNETICS CO LTD
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the wall thickness of the mold cavity becomes smaller and smaller, such as the wall thickness is 0.9mm, and the depth is getting deeper and deeper, such as the height of 40mm, there will be problems that the magnetic powder cannot be filled and the filling is uneven, which will affect the dimensional accuracy and consistent performance of the product. sex

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • technology for pretreat bonded Nd-Fe-B magnetic pow
  • technology for pretreat bonded Nd-Fe-B magnetic pow
  • technology for pretreat bonded Nd-Fe-B magnetic pow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A bonded NdFeB magnetic powder pretreatment process is characterized in that it comprises the following steps:

[0035] a) Magnetic powder crushing: choose magnetic powder YH-13M 5kg from a certain domestic manufacturer, and pass through an 80-mesh sieve after magnetic powder crushing;

[0036] b) Ingredients: mix magnetic powder with epoxy resin magnetic powder glue W-6C and acetone, the amount of epoxy resin magnetic powder glue W-6C added is 1.5wt%, and the amount of acetone added is 8wt%;

[0037] c) stirring mixing: the stirring speed of stirring mixing is 5Hz, and the stirring time is 30 minutes;

[0038] d) Drying: the temperature during drying is 45°C, and the drying time is 100 minutes;

[0039] e) Rolling spray granulation: Add the above-mentioned treated magnetic powder into the drum and roll it, and spray on the top of the magnetic powder at the same time; when the drum rolls, the linear velocity of the inner cylinder wall is 0.5m / s, and the spray radius on...

Embodiment 2

[0043] A bonded NdFeB magnetic powder pretreatment process is characterized in that it comprises the following steps:

[0044] a) Magnetic powder crushing: choose magnetic powder XQP14-12 5kg from a domestic manufacturer, and pass through a 100-mesh sieve after magnetic powder crushing;

[0045] b) Ingredients: mix magnetic powder with epoxy resin magnetic powder glue W-6C and acetone, the amount of epoxy resin magnetic powder glue W-6C added is 1.8wt%, and the amount of acetone added is 9wt%;

[0046] c) stirring mixing: the stirring speed of stirring mixing is 10Hz, and the stirring time is 40 minutes;

[0047] d) Drying: the temperature during drying is 50°C, and the drying time is 120 minutes;

[0048] e) Rolling spray granulation: Add the above-mentioned treated magnetic powder into the drum and roll, and spray on the top of the magnetic powder at the same time; when the drum rolls, the linear velocity of the inner cylinder wall is 1.2m / s, and the spray radius on the mag...

Embodiment 3

[0052] A bonded NdFeB magnetic powder pretreatment process is characterized in that it comprises the following steps:

[0053] a) Magnetic powder crushing: Select 5 kg of magnetic powder HL08-06 from a domestic manufacturer, and pass through a 120-mesh sieve after magnetic powder crushing;

[0054] b) Ingredients: mix the magnetic powder with epoxy resin magnetic powder adhesive W-6C and acetone, the addition amount of epoxy resin magnetic powder adhesive W-6C is 2.0wt%, and the addition amount of acetone is 10wt%;

[0055] c) stirring mixing: the stirring speed of stirring mixing is 15Hz, and the stirring time is 50 minutes;

[0056] d) Drying: the temperature during drying is 60°C, and the drying time is 140 minutes;

[0057] e) Rolling spray granulation: Add the above-mentioned treated magnetic powder into the drum and roll it, and spray it on the top of the magnetic powder at the same time; when the drum rolls, the linear velocity of the inner cylinder wall is 3m / s, and t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of magnetic material manufacturing. A technology for pretreat bonded NdFeB magnetic pow includes such steps as crushing magnetic pow, proportioning, stirring, mixing, drying, rolling spray granulation, crushing, sieving and mixing, wherein that rolling spray granulation step adds the treated magnetic powder to drum and rolling while spraying over the magnetic powder. Through the process treatment in the invention, On the premise of not affecting the performance of the magnetic powder, the particle size distribution and the morphology of the magneticpowder can be changed, the fluidity and the loose loading ratio of the magnetic powder can be improved, the problem that the magnetic powder cannot be filled and uneven under the conditions of the wall thickness of 0.9 mm and below or the height of 40mm and above can be solved, and the dimensional accuracy and the performance consistency of the product can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of magnetic material manufacture, in particular to a pretreatment process of bonded NdFeB magnetic powder. Background technique [0002] Compared with sintered NdFeB magnets, bonded NdFeB magnets have lower magnetic properties than sintered NdFeB magnets, but they can be formed at one time without secondary processing, can be made into various complex shapes, and can be conveniently manufactured in large quantities. Magnetic ring magnets have the characteristics of good performance consistency and uniformity, as well as magnetic properties much higher than bonded ferrite, and are widely used in various micro motors and sensor systems. [0003] In order to fight against more and more solid state drives, hard drive manufacturers plan to develop mechanical hard drives with a thickness of only 7mm to meet the increasingly popular tablet computer market demand, which puts forward higher requirements for magnets. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/057B22F1/00
CPCH01F1/0578H01F41/0253H01F41/0266B22F1/14
Inventor 应晓东
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com