CN111375761A - Release agent for protecting neodymium iron boron pressed blank and mould - Google Patents
Release agent for protecting neodymium iron boron pressed blank and mould Download PDFInfo
- Publication number
- CN111375761A CN111375761A CN202010278322.8A CN202010278322A CN111375761A CN 111375761 A CN111375761 A CN 111375761A CN 202010278322 A CN202010278322 A CN 202010278322A CN 111375761 A CN111375761 A CN 111375761A
- Authority
- CN
- China
- Prior art keywords
- release agent
- ether
- iron boron
- neodymium iron
- zinc stearate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0576—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together pressed, e.g. hot working
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F2003/026—Mold wall lubrication or article surface lubrication
Abstract
The invention discloses a mold release agent for protecting neodymium iron boron pressed compact and mold, which comprises diethyl ether, petroleum ether and zinc stearate particles, wherein the proportion of the diethyl ether, the petroleum ether and the zinc stearate particles is 32-42 parts by weight of the diethyl ether, 30-40 parts by weight of the petroleum ether and 0.5-2 parts by weight of the zinc stearate particles. In the release agent, because the ethyl ether has a low boiling point and is very easy to volatilize, the volatilization speed can be delayed after the petroleum ether with a boiling range of 60-90 ℃ is selected to be mixed with the ethyl ether in a ratio of 1:1, and the zinc stearate particles have a lubricating effect, so that residues are reduced and a mold is protected.
Description
Technical Field
The invention relates to an auxiliary material used for processing and manufacturing neodymium iron boron, in particular to a mold release agent used for protecting a neodymium iron boron pressed blank and a mold in a neodymium iron boron forming process.
Background
In the production process of neodymium iron boron, a forming procedure is a very important link, in order to enable a formed pressed blank to be smoothly separated from a die and ensure that the pressed blank is good in appearance and the die is not damaged, a release agent is generally required to be used, an oil release agent is generally used in the prior production industry of neodymium iron boron, and the oil release agent has the problems of high cost, a large amount of residues, poor release effect and more phenomena of surface cracks and corner falling of the pressed blank. The main components of the oily release agent are various oily substances such as silicone oil and the like, and the oily release agent is not easy to volatilize, so that the surface of a pressed compact is more remained after spraying, and researches show that the magnetic property and the corrosion resistance of the neodymium iron boron magnet are reduced along with the increase of the carbon content of the neodymium iron boron. Therefore, the effect of the oil release agent used for producing the neodymium iron boron at present is not very ideal, the release effect is poor, and the magnetic performance of the neodymium iron boron magnet is influenced.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a mold release agent for protecting neodymium iron boron pressed blanks and molds, because the boiling point of ether is low and the ether is easy to volatilize, the volatilization speed can be delayed after petroleum ether with the boiling range of 60-90 ℃ is selected to be mixed with 1:1 of ether, and zinc stearate particles have a lubricating effect, so that residues are reduced and the molds are protected.
In order to achieve the purpose, the invention provides a mold release agent for protecting a neodymium iron boron green compact and a mold, which comprises 32-42 parts by weight of diethyl ether, 30-40 parts by weight of petroleum ether and 0.5-2 parts by weight of zinc stearate particles.
In a preferred embodiment, diethyl ether and petroleum ether are used as solvents and zinc stearate particles are used as lubricants.
In a preferred embodiment, the ether has a boiling point of 34.6 ℃ and the petroleum ether has a boiling range of 60-90 ℃.
In a preferred embodiment, the ratio of the diethyl ether, the petroleum ether and the zinc stearate particles is as follows: 500ml of diethyl ether, 500ml of petroleum ether and 10g of zinc stearate particles.
Compared with the prior art, the mold release agent for protecting the neodymium iron boron pressed blank and the mold has the following beneficial effects: the ether and the petroleum ether have stable chemical properties, are not easy to generate chemical reaction with other substances, have relatively easy volatilization of the physical properties, have little residue on the surface of the neodymium iron boron green compact after spraying and have no influence on the magnetic property of the neodymium iron boron magnet. The release agent has good release effect in the molding process of sintered neodymium iron boron, can be automatically configured by production enterprises, has good lubricating effect and protects a production mold from being damaged. And the cost is low, the price of the common industrial release agent is about 40 yuan/kg, while the price of the release agent of the invention is about 20 yuan/kg, so the invention has obvious price advantage and reduces the production cost.
Detailed Description
The following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
The release agent for protecting the neodymium iron boron green compact and the die mainly comprises the following raw materials in percentage by weight: the weight ratio of the diethyl ether, the petroleum ether and the zinc stearate particles is 35:32:1 (in the embodiment, 500ml of diethyl ether, 500ml of petroleum ether and 10g of zinc stearate particles are selected by conversion), the diethyl ether and the petroleum ether are used as solvents, the zinc stearate particles are used as lubricants, and the three are mixed and stirred uniformly to form the release agent. The boiling point of the ether is 34.6 ℃, and the ether is very volatile; the petroleum ether has a boiling range of 60-90 deg.C and is slowly volatilized; after the two are mixed in a ratio of 1:1, the volatilization speed is reduced, and the use amount and the cost are reduced. When pressing neodymium iron boron products, the mold release agent is sprayed on the inner wall of the mold (the mixed liquid of ether and petroleum ether is volatilized quickly, and zinc stearate is remained on the inner wall of the mold), and then neodymium iron boron powder is added for pressing, so that the purpose of protecting the mold and pressing blanks is achieved.
The comparison of the use effect of the release agent of the invention and other products of the prior art is shown in the following table:
in conclusion, the mold release agent for protecting the neodymium iron boron green compact and the mold has the following beneficial effects: the ether and the petroleum ether have stable chemical properties, are not easy to generate chemical reaction with other substances, have relatively easy volatilization of the physical properties, have little residue on the surface of the neodymium iron boron green compact after spraying and have no influence on the magnetic property of the neodymium iron boron magnet. The release agent has good release effect in the molding process of sintered neodymium iron boron, can be automatically configured by production enterprises, has good lubricating effect and protects a production mold from being damaged. And the cost is low, the price of the common industrial release agent is about 40 yuan/kg, while the price of the release agent of the invention is about 20 yuan/kg, so the invention has obvious price advantage and reduces the production cost.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (4)
1. The invention discloses a mold release agent for protecting neodymium iron boron pressed compact and a mold, which is characterized by comprising 32-42 parts by weight of ethyl ether, 30-40 parts by weight of petroleum ether and 0.5-2 parts by weight of zinc stearate particles.
2. A mold release agent for protecting nd-fe-b compacts and molds as claimed in claim 1, wherein said ether and said petroleum ether are solvents and said zinc stearate particles are lubricants.
3. A mold release agent for protecting nd-fe-b compacts and molds according to claim 1, wherein the boiling point of the ether is 34.6 ℃ and the petroleum ether is used in the boiling range of 60-90 ℃.
4. The mold release agent for protecting nd-fe-b compacts and molds according to claim 2, wherein the ratio of the ether, the petroleum ether and the zinc stearate particles is 500ml of the ether, 500ml of the petroleum ether and 10g of the zinc stearate particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010278322.8A CN111375761A (en) | 2020-04-10 | 2020-04-10 | Release agent for protecting neodymium iron boron pressed blank and mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010278322.8A CN111375761A (en) | 2020-04-10 | 2020-04-10 | Release agent for protecting neodymium iron boron pressed blank and mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111375761A true CN111375761A (en) | 2020-07-07 |
Family
ID=71213959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010278322.8A Pending CN111375761A (en) | 2020-04-10 | 2020-04-10 | Release agent for protecting neodymium iron boron pressed blank and mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111375761A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60149662A (en) * | 1984-01-13 | 1985-08-07 | Matsushita Electric Works Ltd | Molding material for sealing |
| CN101406927A (en) * | 2008-11-06 | 2009-04-15 | 山西金山磁材有限公司 | Antisticking agent for sintering and molding neodymium iron boron |
| CN101913215A (en) * | 2010-07-14 | 2010-12-15 | 常熟理工学院 | Polyurethane release agent special for automobile ornaments and preparation method thereof |
| CN104890162A (en) * | 2015-06-04 | 2015-09-09 | 江苏华海诚科新材料有限公司 | Mold stripping liquid suitable for rotating cake machine and atomization equipment thereof |
| CN109676835A (en) * | 2019-01-09 | 2019-04-26 | 苏州赫伯特电子科技有限公司 | A kind of encapsulation release agent and its preparation and application |
| CN110181040A (en) * | 2019-07-16 | 2019-08-30 | 中钢集团南京新材料研究院有限公司 | A kind of powder metallurgy prepares the lubricant and application method of neodymium iron boron magnetic body |
-
2020
- 2020-04-10 CN CN202010278322.8A patent/CN111375761A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60149662A (en) * | 1984-01-13 | 1985-08-07 | Matsushita Electric Works Ltd | Molding material for sealing |
| CN101406927A (en) * | 2008-11-06 | 2009-04-15 | 山西金山磁材有限公司 | Antisticking agent for sintering and molding neodymium iron boron |
| CN101913215A (en) * | 2010-07-14 | 2010-12-15 | 常熟理工学院 | Polyurethane release agent special for automobile ornaments and preparation method thereof |
| CN104890162A (en) * | 2015-06-04 | 2015-09-09 | 江苏华海诚科新材料有限公司 | Mold stripping liquid suitable for rotating cake machine and atomization equipment thereof |
| CN109676835A (en) * | 2019-01-09 | 2019-04-26 | 苏州赫伯特电子科技有限公司 | A kind of encapsulation release agent and its preparation and application |
| CN110181040A (en) * | 2019-07-16 | 2019-08-30 | 中钢集团南京新材料研究院有限公司 | A kind of powder metallurgy prepares the lubricant and application method of neodymium iron boron magnetic body |
Non-Patent Citations (1)
| Title |
|---|
| 张华诚: "《粉末冶金实用工艺学》", 30 September 2004, 冶金工业出版社 * |
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Application publication date: 20200707 |