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Antisticking agent for sintering and molding neodymium iron boron

A release agent, NdFeB technology, used in casting molding equipment, molds, cores, etc.

Inactive Publication Date: 2010-07-14
山西金山磁材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a sintered NdFeB Mold release agent for molding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1, a mold release agent for sintered NdFeB molding is composed of the following raw materials, organic solvent, zinc stearate with 3% organic solvent mass, diethyl carbonate with 10% organic solvent mass, organic solvent for aviation gasoline. Add zinc stearate and diethyl carbonate to aviation gasoline to obtain a mixture, mix well and obtain a finished product. A mold release agent with a certain mold release effect suitable for the molding process of sintered NdFeB magnetic materials can be prepared.

Embodiment 2

[0010] Example 2, a mold release agent for sintered NdFeB molding is composed of the following raw materials, organic solvent, zinc stearate with 10% organic solvent mass, diethyl carbonate with 5% organic solvent mass, organic solvent for acetone. Adding zinc stearate and diethyl carbonate to acetone and then mixing uniformly can prepare a mold release agent suitable for the molding process of sintered NdFeB magnetic materials and has a certain mold release effect.

Embodiment 3

[0011] Example 3, a mold release agent for sintered NdFeB molding is composed of the following raw materials, organic solvent, zinc stearate with 10% organic solvent mass, diethyl carbonate with 5% organic solvent mass, organic solvent It is a mixture of aviation gasoline and acetone. Adding zinc stearate and diethyl carbonate to the mixture of aviation gasoline and acetone in any proportion and then mixing uniformly can prepare a mold release agent suitable for the molding process of sintered NdFeB magnetic materials with good mold release effect.

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PUM

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Abstract

The invention relates to an auxiliary material for machining and manufacturing neodymium iron boron, in particular to a mould release agent for molding sintered neodymium iron boron. The auxiliary material solves a series of problems caused by using the prior silicon oil class mould release agent in the production of the sintered neodymium iron boron. The auxiliary material consists of the following raw materials: an organic solvent, zinc stearate accounting for 3 to 10 percent of the mass of the organic solvent, and diethyl carbonate accounting for 5 to 10 percent of the mass of the organic solvent; and the organic solvent is gasoline, acetone or a mixture of the gasoline and the acetone. Compared with the prior mould release agent, the mould release agent has good mould release effect and low cost in the production of a sintered neodymium iron boron product, and has certain lubrication effect at the same time, in particular that the added diethyl carbonate is beneficial to improvingthe orientation degree of magnetic powder close to a contact surface of a mould.

Description

technical field [0001] The invention relates to an auxiliary material used in the processing and manufacturing of NdFeB, in particular to a release agent used in sintered NdFeB molding. Background technique [0002] In the production of sintered NdFeB, the molding process is one of the very important links. In order to separate the product from the mold smoothly, it is often necessary to use a release agent. At present, the silicone oil release agent commonly used in the industrial industry is used. The biggest problem is high cost, many residues, strong odor and not very good demoulding effect, and the rate of defective products is relatively high. Chinese patent, application number is that 88106228.6 discloses a kind of release agent that is used for unsaturated polyester resin, and it is made by lecithin, soybean oil, linseed oil, cocoa butter, zinc stearate, and the weight of its formula The percentages are 28-36% of lecithin, 18-22% of soybean oil, 18-22% of linseed o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
Inventor 刘吉祥王瑜张葆华
Owner 山西金山磁材有限公司