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Magnetic powder injection molding binder, preparation method and application method

A technology of injection molding and application method, applied in the field of magnetic powder injection molding binder and preparation, can solve the problems of undisclosed addition amount and removal effect, and achieve the effect of good injection molding effect, good rolling property and reducing carbon content

Pending Publication Date: 2021-10-19
福建尚辉润德新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN104942296A discloses a binder used in a magnetic powder injection molding process, including HDPE, LDPE, N,N'-ethylenebisstearamide, polyethylene wax, paraffin, stearic acid and titanate coupling agent, However, there is no public information on the amount of addition, removal effect, etc.

Method used

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  • Magnetic powder injection molding binder, preparation method and application method
  • Magnetic powder injection molding binder, preparation method and application method
  • Magnetic powder injection molding binder, preparation method and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0025] Embodiment 1~5 prepares binding agent

Embodiment 1

[0027] Spherical nano-silica is selected, with an average particle size of 50nm.

[0028] Ultrasonically disperse 1.5 parts of spherical nano-silica in 200 parts of gasoline, add 60 parts of paraffin and mix evenly, remove gasoline, add 25 parts of HDPE, 1.5 parts of stearic acid and 12 parts of EVA, heat to 140 ° C and stir and mix evenly to obtain Adhesive, denoted as A-1.

Embodiment 2

[0030] Spherical nano-silica is selected, with an average particle size of 50nm.

[0031] Ultrasonic disperse 5 parts of spherical nano-silica in 200 parts of gasoline, add 60 parts of paraffin and mix well, remove gasoline, add 25 parts of HDPE, 1.5 parts of stearic acid and 8.5 parts of EVA, heat to 140 °C and stir to mix evenly to obtain Adhesive, denoted as A-2.

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Abstract

The invention provides a magnetic powder injection molding binder, a preparation method and an application method. The magnetic powder injection molding binder is composed of the following raw material components of, in percentage by weight, 30-60% of paraffin, 10-30% of HDPE (High-Density Polyethylene), 0.5-5% of stearic acid, 1-10% of spherical nano inorganic oxide and the balance EVA (Ethylene Vinyl Acetate), and the average particle size of the spherical nano inorganic oxide is 10-200nm. According to the magnetic powder injection molding binder, the spherical nano inorganic oxide is added into the binder, after the spherical nano inorganic oxide is mixed with magnetic powder, the pressure during injection molding can be obviously reduced, the use amount of the binder is reduced, the binder is favorably removed, and the product performance is improved.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic materials, and relates to a magnetic powder injection molding binder, a preparation method and an application method. Background technique [0002] Metal powder injection molding (MIM) technology is an important method to realize the miniaturization and complexity of metal parts. With the miniaturization of electrical equipment, structural requirements such as miniaturization, complexity and precision are put forward for magnetic materials. MIM is the main method to achieve this requirement, but MIM needs to add a large amount of binder in production, and even the amount of binder used will reach more than 50% of the weight of the magnetic powder, which not only poses a challenge to the removal of the binder High technical requirements, and high binder content are likely to lead to large shrinkage and shape deformation of the molded parts. [0003] Therefore, how to develop good bonding ef...

Claims

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Application Information

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IPC IPC(8): B22F3/22B22F3/10B22F3/24
CPCB22F3/225B22F3/1007B22F3/1021B22F3/24B22F2003/248
Inventor 朱林辉
Owner 福建尚辉润德新材料科技有限公司
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