CN115739569A - Secondary coating production method of electrical steel self-bonding coating - Google Patents
Secondary coating production method of electrical steel self-bonding coating Download PDFInfo
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- CN115739569A CN115739569A CN202211395903.5A CN202211395903A CN115739569A CN 115739569 A CN115739569 A CN 115739569A CN 202211395903 A CN202211395903 A CN 202211395903A CN 115739569 A CN115739569 A CN 115739569A
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Abstract
The application provides a secondary coating production method of an electrical steel self-bonding coating, which comprises the following steps: step one, selecting an electrical steel strip, wherein the surface of the electrical steel strip is coated with an insulating coating or a self-bonding coating which is failed; step two, controlling the plate temperature of the electrical steel belt to be below 50 ℃; sequentially coating the self-bonding coating liquid on the surface of the electrical steel strip to obtain a self-bonding coating; step four, baking the electrical steel strip with the coating completely coated, and then cooling; and step five, laminating the electrical steel strip obtained in the step four, and then continuously curing for 0.5-2 hours. The self-adhesive coating liquid is directly coated on the insulating coating or the failed self-adhesive coating, and then the self-adhesive coating liquid is baked and cured to produce the obtained electrical steel self-adhesive coating product.
Description
Technical Field
The invention relates to the technical field of special coatings, in particular to a secondary coating production method of an electrical steel self-bonding coating.
Background
In the existing motor manufacturing process, after punching and laminating, silicon steel is usually fastened into an iron core by adopting a welding, bolt connection or riveting mode, but the connection mode possibly has the following problems: (1) The magnetic performance of the iron core is deteriorated at the welding or riveting position, so that the operation efficiency of the motor is influenced; (2) Only one part of the iron core is fastened, and noise is easy to generate during magnetic resonance; (3) And the iron core is only partially fixed, cannot be applied to the working condition with high fastening requirement, and is not suitable for the micro motor.
In order to solve the problems possibly existing in the welding, bolt connection or riveting mode, the iron core lamination is fixed by coating a self-adhesive coating on the surface of silicon steel at present, so that the iron core can be fixed on the whole surface, the fixing strength is improved, the magnetic property damage is less, the size of the motor can be smaller under the same effect, and the vibration and the noise of the silicon steel sheet in the iron core can be effectively reduced.
However, the environmental protection type insulating coating is coated on the surface of the electrical steel sold in the steel mill at present, the insulating coating is not a self-adhesive coating, after a motor user purchases the electrical steel, the insulating coating needs to be treated firstly, then the self-adhesive coating is coated, not only is the workload increased, but also the environment pollution is caused by the stripping of the insulating coating, even if the surface of the electrical steel sold in the steel mill is coated with the self-adhesive coating, the shelf life of the self-adhesive coating is only 6 months, after 6 months, the self-adhesive coating can fail, the self-adhesive coating after failure needs to be treated firstly, and the same problems can still exist.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a secondary coating production method of an electrical steel self-bonding coating, which does not increase the workload, is environment-friendly and can ensure the bonding strength.
A secondary coating production method of an electrical steel self-bonding coating comprises the following steps,
selecting an electrical steel strip with the thickness of 0.10-0.65 mm, wherein the surface of the electrical steel strip is uniformly coated with an insulating coating or a self-bonding coating on the surface of the electrical steel strip fails;
step two, before the self-bonding coating is coated, controlling the plate temperature of the electrical steel strip in the step one to be below 50 ℃, controlling the solid content of the self-bonding coating liquid to be 35-60% and controlling the viscosity to be 40-70S;
step three, carrying out down coating on the electrical steel strip by adopting a two-roller or three-roller mode, and uniformly coating the self-bonding coating liquid on the surface of the electrical steel strip to obtain a self-bonding coating with the thickness of 4-7 mu m;
step four, baking the electrical steel strip with the coating at the temperature of 130-200 ℃ for 30-60 seconds, and then cooling the baked electrical steel strip to the temperature below 60 ℃;
and step five, laminating the electrical steel strip obtained in the step four, and then continuously curing for 0.5-2 hours at the temperature of 160-210 ℃ under the pressure of 1-5 MPa.
Furthermore, the solid content of the self-bonding coating liquid is controlled to be 45-50%, and the viscosity is controlled to be 50-55S.
Further, the temperature of the baked electrical steel strip is cooled to below 50 ℃.
Further, the plate temperature of the electrical steel strip in the second step is controlled to be 35-50 ℃.
According to the technical scheme, the self-adhesive coating liquid is directly coated on the insulating coating or the failed self-adhesive coating, and then the self-adhesive coating liquid is baked and cured to produce the obtained electric steel self-adhesive coating product.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Detailed Description
Exemplary embodiments will be described in detail herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at" \8230; "or" when 8230; \8230; "or" in response to a determination ", depending on the context.
The following is a detailed description of the secondary coating production method of the electrical steel self-bonding coating of the invention. The features of the following examples and embodiments may be combined with each other without conflict.
The application relates to a secondary coating production method of an electrical steel self-bonding coating, which comprises the following steps:
selecting an electrical steel strip with the thickness of 0.10-0.65 mm, wherein the surface of the electrical steel strip is uniformly coated with an insulating coating or a failed self-adhesive coating, the insulating coating does not have self-adhesive property, and the failed self-adhesive coating does not have self-adhesive property after the expiration date is over 6 months;
step two, before coating the self-bonding coating, controlling the plate temperature of the electrical steel strip below 50 ℃, preferably 35-50 ℃, controlling the solid content of the self-bonding coating liquid at 35-60% and controlling the viscosity at 40-70S;
step three, adopting a two-roller type or three-roller type to carry out sequential coating on the electrical steel strip, and uniformly coating the self-bonding coating liquid on the surface of the electrical steel strip to obtain a self-bonding coating with the thickness of 4-7 mu m;
step four, baking the electrical steel strip with the coating at the temperature of 130-200 ℃ for 30-60 seconds, and then cooling the baked electrical steel strip to the temperature below 60 ℃, preferably below 50 ℃, so as to avoid the damage to the coating in a hot state;
and step five, laminating the electrical steel strip obtained in the step four, and then continuously curing for 0.5-2 hours at the temperature of 160-210 ℃ under the pressure of 1-5 MPa.
In the embodiment, the solid content of the self-bonding coating liquid is preferably 45 to 50%, and the viscosity is preferably 50 to 55S.
The applicant has carried out a number of specific tests, some of which have been detailed, the specific test parameters and the final bond strengths being shown in table 1.
TABLE 1
When the bonding strength is larger than 1N/mm, the bonding strength of the electrical steel self-bonding coating product meets the requirement, so that the bonding strength can meet the requirement by directly coating, drying and curing the original coating of the electrical steel strip, the treatment of the original coating can be omitted, the cost is lower, and the coating is more environment-friendly.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A secondary coating production method of an electrical steel self-bonding coating is characterized by comprising the following steps,
step one, selecting an electrical steel strip with the thickness of 0.10-0.65 mm, wherein an insulating coating is uniformly coated on the surface of the electrical steel strip or a self-bonding coating on the surface of the electrical steel strip fails;
step two, before coating the self-bonding coating, controlling the plate temperature of the electrical steel strip in the step one to be below 50 ℃, controlling the solid content of the self-bonding coating liquid to be 35-60%, and controlling the viscosity to be 40-70S;
step three, carrying out down coating on the electrical steel strip by adopting a two-roller or three-roller mode, and uniformly coating the self-bonding coating liquid on the surface of the electrical steel strip to obtain a self-bonding coating with the thickness of 4-7 mu m;
step four, baking the electrical steel strip coated with the coating at the temperature of 130-200 ℃ for 30-60 seconds, and then cooling the baked electrical steel strip to the temperature below 60 ℃;
and step five, laminating the electrical steel strip in the step four, and continuously curing for 0.5 to 2 hours at the temperature of 160 to 210 ℃ under the pressure of 1 to 5 MPa.
2. The secondary coating production method of the electrical steel self-bonding coating according to claim 1, wherein the solid content of the self-bonding coating liquid is controlled to be 45-50%, and the viscosity is controlled to be 50-55S.
3. The method for the secondary coating production of an electrical steel self-bonding coating according to claim 1, characterized in that the temperature of the electrical steel strip after baking is cooled to below 50 ℃.
4. The method for producing an electrical steel strip with a self-adhesive coating by secondary coating according to claim 1, wherein the temperature of the electrical steel strip in the second step is controlled to be 35-50 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211395903.5A CN115739569A (en) | 2022-11-05 | 2022-11-05 | Secondary coating production method of electrical steel self-bonding coating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211395903.5A CN115739569A (en) | 2022-11-05 | 2022-11-05 | Secondary coating production method of electrical steel self-bonding coating |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1532003A (en) * | 2003-03-21 | 2004-09-29 | 宝山钢铁股份有限公司 | Coating method for self adhesive coating of electrical steel |
| CN106755843A (en) * | 2016-12-19 | 2017-05-31 | 宁波银亿科创新材料有限公司 | A kind of process for making orientation silicon steel |
| CN109013253A (en) * | 2018-07-02 | 2018-12-18 | 山西太钢不锈钢股份有限公司 | The production method of electrical sheet self-adhesive coating |
| CN115156008A (en) * | 2022-08-17 | 2022-10-11 | 山西太钢不锈钢股份有限公司 | Production method and application of ultrathin electrical steel self-bonding coating |
-
2022
- 2022-11-05 CN CN202211395903.5A patent/CN115739569A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1532003A (en) * | 2003-03-21 | 2004-09-29 | 宝山钢铁股份有限公司 | Coating method for self adhesive coating of electrical steel |
| CN106755843A (en) * | 2016-12-19 | 2017-05-31 | 宁波银亿科创新材料有限公司 | A kind of process for making orientation silicon steel |
| CN109013253A (en) * | 2018-07-02 | 2018-12-18 | 山西太钢不锈钢股份有限公司 | The production method of electrical sheet self-adhesive coating |
| CN115156008A (en) * | 2022-08-17 | 2022-10-11 | 山西太钢不锈钢股份有限公司 | Production method and application of ultrathin electrical steel self-bonding coating |
Non-Patent Citations (1)
| Title |
|---|
| 王新林: "《金属功能材料》", 冶金工业出版社, pages: 366 * |
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