CN107694890B - Coating method of magnesium oxide coating film of 1J22 punching sheet - Google Patents
Coating method of magnesium oxide coating film of 1J22 punching sheet Download PDFInfo
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- CN107694890B CN107694890B CN201710779345.5A CN201710779345A CN107694890B CN 107694890 B CN107694890 B CN 107694890B CN 201710779345 A CN201710779345 A CN 201710779345A CN 107694890 B CN107694890 B CN 107694890B
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- magnesium oxide
- oxide coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/084—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to condition of liquid or other fluent material already sprayed on the target, e.g. coating thickness, weight or pattern
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- Chemical Treatment Of Metals (AREA)
Abstract
The invention belongs to a surface treatment technology, and relates to a coating method of a magnesium oxide coating film of a 1J22 punching sheet. The method is characterized in that the steps of coating the magnesium oxide coating film are as follows: blending coating liquid; diluting the coating solution; preheating; spraying; and (5) drying. The invention provides a coating method of a magnesium oxide coating film of a 1J22 punching sheet, which can accurately control the thickness of the film, further ensure the total thickness of an iron core formed by overlapping the 1J22 punching sheets and improve the product percent of pass.
Description
Technical Field
The invention belongs to a surface treatment technology, and relates to a coating method of a magnesium oxide coating film of a 1J22 punching sheet.
Background
The effect of coating the magnesium oxide film on the 1J22 punching sheet is to ensure that the silicon steel pole magnesium oxide has good magnetic permeability, namely, has larger positive magnetic rate and excellent insulating property, namely, the compact state with the electric conductivity as low as 10-14 us/cm. The surface of the silicon steel sheet can form good insulating layers and magnetic conductive media so as to overcome the nest flow and skin effect loss of a silicon steel iron core in the transformer. Generally used for insulating materials, flame retardants, desiccants, wireless high-frequency paramagnetic magnetic materials, magnetic rod antennas, magnetic cores of frequency modulation elements and the like. The current coating method for coating the magnesium oxide film on the 1J22 punching sheet comprises the following steps: coating magnesium oxide coating liquid with the mass concentration of 8-12% on the surface of the 1J22 punching sheet by adopting a manual or spraying method, and drying to generate a magnesium oxide coating film with the thickness of 15-30 mu m. The disadvantages are that: the thickness of the film layer is difficult to control, so that the total thickness of the iron core formed by overlapping 1J22 punching sheets is easy to be out of tolerance, and the product percent of pass is low.
Disclosure of Invention
The purpose of the invention is: the coating method of the magnesium oxide coating film of the 1J22 punching sheet is provided, so that the thickness of the film can be accurately controlled, the total thickness of the iron core formed by overlapping the 1J22 punching sheets is ensured, and the product percent of pass is improved.
The technical scheme of the invention is as follows: a coating method of a magnesium oxide coating film of a 1J22 punching sheet is characterized by comprising the following steps:
1. coating liquid blending: the magnesium oxide coating liquid is a mixed liquid of magnesium oxide with the mass concentration of 8-12% and water; grinding the magnesium oxide in a grinding machine for at least 8 hours at the rotating speed of 300 r/s-400 r/s, taking out, mixing the magnesium oxide with deionized water, and stirring the mixture for at least 2 hours by using a stirrer;
2. diluting the coating liquid, namely diluting the magnesium oxide coating liquid by using deionized water until the mass concentration of magnesium oxide is 5% to obtain magnesium oxide coating liquid diluent;
3. preheating: putting the 1J22 punching sheet into an oven, heating to 100-150 ℃, and preserving heat for at least 15 min; simultaneously heating the magnesium oxide coating solution diluent to 60-70 ℃, stirring the magnesium oxide coating solution diluent for at least 30s by using a glass rod, and pouring the magnesium oxide coating solution diluent into a liquid storage tank of a stainless steel spray gun;
4. spraying: spraying magnesium oxide coating solution diluent on the surface of the 1J22 punching sheet by a stainless steel spray gun, wherein the spraying air pressure is 2 Pa-3 Pa, and the spraying thickness is 5 mu m-12 mu m;
5. drying: and (3) placing the 1J22 punching sheet into an oven, heating to 500-550 ℃, preserving heat for at least 4h, and cooling to room temperature along with the oven.
The invention has the advantages that: the coating method of the magnesium oxide coating film of the 1J22 punching sheet is provided, the thickness of the film can be accurately controlled, the total thickness of the iron core formed by overlapping the 1J22 punching sheets is further ensured, and the product percent of pass is improved.
Detailed Description
The invention is further explained in detail below, and the method for coating the magnesium oxide coating film on the 1J22 punching sheet is characterized in that the steps for coating the magnesium oxide coating film are as follows:
1. coating liquid blending: the magnesium oxide coating liquid is a mixed liquid of magnesium oxide with the mass concentration of 8-12% and water; grinding the magnesium oxide in a grinding machine for at least 8 hours at the rotating speed of 300 r/s-400 r/s, taking out, mixing the magnesium oxide with deionized water, and stirring the mixture for at least 2 hours by using a stirrer; the magnesium oxide was ground for 8 hours and stirred with deionized water for 2 hours to mix well;
2. diluting the coating liquid, namely diluting the magnesium oxide coating liquid by using deionized water until the mass concentration of magnesium oxide is 5% to obtain magnesium oxide coating liquid diluent;
3. preheating: putting the 1J22 punching sheet into an oven, heating to 100-150 ℃, and preserving heat for at least 15 min; simultaneously heating the magnesium oxide coating solution diluent to 60-70 ℃, stirring the magnesium oxide coating solution diluent for at least 30s by using a glass rod, and pouring the magnesium oxide coating solution diluent into a liquid storage tank of a stainless steel spray gun; the 1J22 punching sheet and the coating liquid are heated so that the coating liquid is sprayed on the 1J22 punching sheet and water is quickly gasified under the action of temperature to form a magnesium oxide film;
4. spraying: spraying magnesium oxide coating solution diluent on the surface of the 1J22 punching sheet by a stainless steel spray gun, wherein the spraying air pressure is 2 Pa-3 Pa, and the spraying thickness is 5 mu m-12 mu m;
5. drying: and (3) placing the 1J22 punching sheet into an oven, heating to 500-550 ℃, preserving heat for at least 4h, and cooling to room temperature along with the oven.
In the embodiment 1, the material is a 1J22 punching sheet, the outer diameter is phi 350, the thickness of the material is 1.5, and magnesium oxide is sprayed on two sides of the material, and the spraying thickness is 5-8 mu m.
The steps of coating the magnesium oxide coating film are as follows:
1. coating liquid blending: the magnesium oxide coating liquid is a mixed liquid of magnesium oxide with the mass concentration of 12% and water; grinding magnesium oxide in a grinding machine for 10 hours at the rotating speed of 300r/s, taking out, mixing deionized water with the magnesium oxide, and stirring for 2 hours by using a stirrer; the magnesium oxide was ground for 10 hours and stirred with deionized water for 2 hours to mix well;
2. diluting the coating liquid, namely diluting the magnesium oxide coating liquid by using deionized water until the mass concentration of magnesium oxide is 5% to obtain magnesium oxide coating liquid diluent;
3. preheating: putting the 1J22 punching sheet into an oven, heating to 150 ℃, and preserving heat for at least 19 min; simultaneously heating the magnesium oxide coating solution diluent to 70 ℃, stirring the magnesium oxide coating solution diluent for 30s by using a glass rod, and pouring the magnesium oxide coating solution diluent into a liquid storage tank of a stainless steel spray gun; the 1J22 punching sheet and the coating liquid are heated so that the coating liquid is sprayed on the 1J22 punching sheet and water is quickly gasified under the action of temperature to form a magnesium oxide film;
4. spraying: spraying magnesium oxide coating solution diluent on the surface of the 1J22 punching sheet by using a stainless steel spray gun, wherein the spraying air pressure is 3Pa, and the spraying thickness is 6 mu m;
5. drying: and (3) putting the 1J22 punching sheet into an oven, heating to 550 ℃, preserving heat for 6h, and cooling to room temperature along with the oven.
In the embodiment 2, the material is a 1J22 punching sheet, the outer diameter is phi 320, the thickness of the material is 1.5, and magnesium oxide is sprayed on two sides of the material, and the spraying thickness is 5-12 mu m.
The steps of coating the magnesium oxide coating film are as follows:
1. coating liquid blending: the magnesium oxide coating liquid is a mixed liquid of magnesium oxide with the mass concentration of 12% and water; grinding magnesium oxide in a grinding machine for 12 hours at the rotating speed of 400r/s, taking out, mixing deionized water with the magnesium oxide, and stirring for 2 hours by using a stirrer; the magnesium oxide was ground for 12 hours and stirred with deionized water for 2 hours to mix well;
2. diluting the coating liquid, namely diluting the magnesium oxide coating liquid by using deionized water until the mass concentration of magnesium oxide is 5% to obtain magnesium oxide coating liquid diluent;
3. preheating: putting the 1J22 punching sheet into an oven, heating to 130 ℃, and preserving heat for 18 min; simultaneously heating the magnesium oxide coating solution diluent to 70 ℃, stirring the magnesium oxide coating solution diluent for 30s by using a glass rod, and pouring the magnesium oxide coating solution diluent into a liquid storage tank of a stainless steel spray gun; the 1J22 punching sheet and the coating liquid are heated so that the coating liquid is sprayed on the 1J22 punching sheet and water is quickly gasified under the action of temperature to form a magnesium oxide film;
4. spraying: spraying magnesium oxide coating solution diluent on the surface of the 1J22 punching sheet by using a stainless steel spray gun, wherein the spraying air pressure is 2Pa, and the spraying thickness is 10 mu m;
5. drying: and (3) putting the 1J22 punching sheet into an oven, heating to 530 ℃, preserving heat for 6h, and cooling to room temperature along with the oven.
In example 3, the material is a 1J22 punching sheet, the outer diameter is phi 150, the thickness of the material is 1.5, and magnesium oxide is sprayed on two sides of the material, wherein the spraying thickness is 5-8 mu m.
The steps of coating the magnesium oxide coating film are as follows:
1. coating liquid blending: the magnesium oxide coating liquid is a mixed liquid of magnesium oxide with the mass concentration of 9% and water; grinding magnesium oxide in a grinding machine for at least 8 hours at the rotating speed of 400r/s, taking out, mixing deionized water with the magnesium oxide, and stirring for 6 hours by using a stirrer; the magnesium oxide was ground for 8 hours and stirred with deionized water for 6 hours to mix well;
2. diluting the coating liquid, namely diluting the magnesium oxide coating liquid by using deionized water until the mass concentration of magnesium oxide is 5% to obtain magnesium oxide coating liquid diluent;
3. preheating: putting the 1J22 punching sheet into an oven, heating to 150 ℃, and preserving heat for 15 min; simultaneously heating the magnesium oxide coating solution diluent to 70 ℃, stirring the magnesium oxide coating solution diluent for 30s by using a glass rod, and pouring the magnesium oxide coating solution diluent into a liquid storage tank of a stainless steel spray gun; the 1J22 punching sheet and the coating liquid are heated so that the coating liquid is sprayed on the 1J22 punching sheet and water is quickly gasified under the action of temperature to form a magnesium oxide film;
4. spraying: spraying magnesium oxide coating solution diluent on the surface of the 1J22 punching sheet by using a stainless steel spray gun, wherein the spraying air pressure is 2 Pa-3 Pa, and the spraying thickness is 7 mu m;
5. drying: and (3) placing the 1J22 punching sheet into an oven, heating to 500 ℃, preserving heat for 8h, and cooling to room temperature along with the oven.
Example 4, the material is a 1J22 punching sheet, the outer diameter is phi 50, the material thickness is 1.5, and magnesium oxide is sprayed on two sides, and the spraying thickness is 5-12 μm.
The steps of coating the magnesium oxide coating film are as follows:
1. coating liquid blending: the magnesium oxide coating liquid is a mixed liquid of magnesium oxide with the mass concentration of 12% and water; grinding magnesium oxide in a grinding machine for 8 hours at the rotating speed of 400r/s, taking out, mixing deionized water with the magnesium oxide, and stirring for 4 hours by using a stirrer; the magnesium oxide was ground for 8 hours and stirred with deionized water for 4 hours to mix well;
2. diluting the coating liquid, namely diluting the magnesium oxide coating liquid by using deionized water until the mass concentration of magnesium oxide is 5% to obtain magnesium oxide coating liquid diluent;
3. preheating: putting the 1J22 punching sheet into an oven, heating to 150 ℃, and preserving heat for 15 min; simultaneously heating the magnesium oxide coating solution diluent to 70 ℃, stirring the magnesium oxide coating solution diluent for 30s by using a glass rod, and pouring the magnesium oxide coating solution diluent into a liquid storage tank of a stainless steel spray gun; the 1J22 punching sheet and the coating liquid are heated so that the coating liquid is sprayed on the 1J22 punching sheet and water is quickly gasified under the action of temperature to form a magnesium oxide film;
4. spraying: spraying magnesium oxide coating solution diluent on the surface of the 1J22 punching sheet by using a stainless steel spray gun, wherein the spraying air pressure is 3Pa, and the spraying thickness is 10 mu m;
5. drying: and (3) putting the 1J22 punching sheet into an oven, heating to 530 ℃, preserving heat for 8h, and cooling to room temperature along with the oven.
Claims (1)
1. A coating method of a magnesium oxide coating film of a 1J22 punching sheet is characterized by comprising the following steps:
1.1, coating liquid preparation: the magnesium oxide coating liquid is a mixed liquid of magnesium oxide with the mass concentration of 8-12% and water; grinding the magnesium oxide in a grinding machine for at least 8 hours at the rotating speed of 300 r/s-400 r/s, taking out, mixing the magnesium oxide with deionized water, and stirring the mixture for at least 2 hours by using a stirrer;
1.2, coating liquid dilution, namely diluting the magnesium oxide coating liquid with deionized water until the mass concentration of magnesium oxide is 5% to obtain magnesium oxide coating liquid dilution liquid;
1.3, preheating: putting the 1J22 punching sheet into an oven, heating to 100-150 ℃, and preserving heat for at least 15 min; simultaneously heating the magnesium oxide coating solution diluent to 60-70 ℃, stirring the magnesium oxide coating solution diluent for at least 30s by using a glass rod, and pouring the magnesium oxide coating solution diluent into a liquid storage tank of a stainless steel spray gun;
1.4, spraying: spraying magnesium oxide coating solution diluent on the surface of the 1J22 punching sheet by a stainless steel spray gun, wherein the spraying air pressure is 2 Pa-3 Pa, and the spraying thickness is 5 mu m-12 mu m;
1.5, drying: and (3) placing the 1J22 punching sheet into an oven, heating to 500-550 ℃, preserving heat for at least 4h, and cooling to room temperature along with the oven.
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| CN201710779345.5A CN107694890B (en) | 2017-09-01 | 2017-09-01 | Coating method of magnesium oxide coating film of 1J22 punching sheet |
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| CN201710779345.5A CN107694890B (en) | 2017-09-01 | 2017-09-01 | Coating method of magnesium oxide coating film of 1J22 punching sheet |
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| CN107694890B true CN107694890B (en) | 2020-10-13 |
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| CN109055920A (en) * | 2018-08-31 | 2018-12-21 | 北京曙光航空电气有限责任公司 | A kind of preparation and application of magnesia film masking liquid |
| CN109365241B (en) * | 2018-08-31 | 2022-09-06 | 北京曙光航空电气有限责任公司 | Preparation and application method of magnesium oxide film conversion coating liquid |
| CN109290158A (en) * | 2018-08-31 | 2019-02-01 | 北京曙光航空电气有限责任公司 | A kind of magnesia film roll coating process |
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| CN102147347A (en) * | 2011-01-16 | 2011-08-10 | 首钢总公司 | Determination method for hydration rate curve of electrical steel dedicated magnesium oxide |
| CN102755955A (en) * | 2012-07-31 | 2012-10-31 | 东莞市晶磁科技有限公司 | Amorphous magnetic core surface coating process |
| CN103555041A (en) * | 2013-10-14 | 2014-02-05 | 上海奇佳化工有限公司 | Insulating paint with high punching performance for non-oriented electrical steel, and preparation method and application thereof |
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| CN1175783A (en) * | 1996-08-30 | 1998-03-11 | 黄元康 | Method for making ring core by coiling of large soft-magnetic alloy strip |
| CN106644827B (en) * | 2016-09-26 | 2019-03-15 | 武汉钢铁有限公司 | A method of differentiating magnesia reunion and hydrated state in silicon-steel magnesium oxide masking liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147347A (en) * | 2011-01-16 | 2011-08-10 | 首钢总公司 | Determination method for hydration rate curve of electrical steel dedicated magnesium oxide |
| CN102755955A (en) * | 2012-07-31 | 2012-10-31 | 东莞市晶磁科技有限公司 | Amorphous magnetic core surface coating process |
| CN103555041A (en) * | 2013-10-14 | 2014-02-05 | 上海奇佳化工有限公司 | Insulating paint with high punching performance for non-oriented electrical steel, and preparation method and application thereof |
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