CN113369114A - Multicolor spraying method for breast board - Google Patents
Multicolor spraying method for breast board Download PDFInfo
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- CN113369114A CN113369114A CN202110687704.0A CN202110687704A CN113369114A CN 113369114 A CN113369114 A CN 113369114A CN 202110687704 A CN202110687704 A CN 202110687704A CN 113369114 A CN113369114 A CN 113369114A
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- breast board
- coating
- spraying
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- curing
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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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
- B05D5/065—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects having colour interferences or colour shifts or opalescent looking, flip-flop, two tones
- B05D5/066—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects having colour interferences or colour shifts or opalescent looking, flip-flop, two tones achieved by multilayers
-
- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- 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
- B05D3/002—Pretreatement
-
- 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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- 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
- B05D3/04—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 exposure to gases
- B05D3/0406—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 exposure to gases the gas being air
- B05D3/0426—Cooling with air
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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
- B05D7/14—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 to metal, e.g. car bodies
- B05D7/16—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 to metal, e.g. car bodies using synthetic lacquers or varnishes
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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
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
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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
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
-
- 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
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
- B05D2202/15—Stainless steel
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides a multicolor spraying method for a breast board, which mainly comprises the steps of spraying a substrate once, solidifying once and cooling once; carrying out secondary spraying, secondary curing and secondary cooling on the matrix; after primary cooling, the thickness of the first coating is 6-8 μm; after the second cooling, the total thickness of the second coating and the first coating is between 12 and 20 mu m. In the method, the thicknesses of the first coating and the second coating are controlled, so that the first coating is tightly connected with the substrate, and the second coating is tightly connected with the first coating, so that the breast board has the advantages of good salt spray resistance and water resistance; the salt spray resistance time is as long as 720 h.
Description
Technical Field
The invention relates to the technical field of spraying, in particular to a multicolor spraying method for a breast board.
Background
The fence board is a fixing device which is arranged on both sides of the road and used for warning, protection and beautification. When the fence is beautified, the surface of the fence is generally colored in a spraying mode, so that the performance of the fence is improved while the fence is beautified.
The spraying is a coating method for spraying liquid such as paint, oil paint and the like on the surface of an object to be coated by a spraying tool, and the method has the advantages of wide application due to high spraying efficiency and good uniformity. At present, the hurdle board is mainly sprayed in a single color, and along with the improvement of aesthetic level of people, the single color spraying is difficult to meet the requirement, and particularly, the multi-color hurdle board is more popular when being used in cities.
In the process of multicolor spraying, the phenomena of spalling, fault and the like are easily generated on the whole coating coated on the surface of the breast board due to different coating thicknesses and performances of paint or coating during multiple times of spraying, and the salt spray resistance and the water resistance of the breast board are poor under the condition that the breast board is exposed for use.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a multicolor spraying method for a breast board, wherein the thicknesses of a first coating and a second coating are controlled, so that the first coating is tightly connected with a substrate, and the second coating is tightly connected with the first coating, so that the breast board has the advantages of good salt spray resistance and water resistance; the salt spray resistance time is as long as 720 h.
The technical scheme of the invention is as follows:
a multicolor spraying method for a breast board mainly comprises the steps of spraying a substrate once, solidifying once and cooling once; carrying out secondary spraying, secondary curing and secondary cooling on the matrix;
after primary cooling, the thickness of the first coating is 6-8 μm;
after the second cooling, the total thickness of the second coating and the first coating is between 12 and 20 mu m.
The breast board is different according to the application place, mainly has indoor breast board and outdoor breast board, and because the protective effect of breast board is fabulous, consequently, the use of outdoor breast board is more extensive. When the outdoor breast board is used, the factors influencing the service life of the outdoor breast board are many, wherein the main factors comprise external force damage such as impact and the like, and corrosion damage such as rainwater, snow water and the like; in the one-time curing process, the first coating sprayed on the surface of the substrate is newly called as a dense mesh structure and is tightly combined with the surface of the substrate, so that a first layer of guarantee is provided for the corrosion resistance of the breast board, and meanwhile, the tightness degree of the first coating and the substrate indirectly influences the protection performance of the second coating because the second coating is coated on the first coating.
Preferably, the primary curing and the secondary curing are both sintering curing.
Preferably, the curing process is closed baking, the primary curing temperature is 350-360 ℃, and the secondary curing temperature is 320-340 ℃. The primary curing process aims at tightly combining the substrate and the paint, and because the substrate has good heat transfer performance, the primary curing of the first coating is carried out at high temperature, so that the curing effect is ensured, and the curing time is shortened; the secondary curing is mainly the combination of the first coating and the second coating, and in the curing process, the temperature is reduced at a lower temperature, so that the heat transfer of the second coating is more uniform, the tightness of the combination of the first coating and the second coating is ensured, and the integral antirust effect of the breast board is further improved.
Preferably, the substrate is a strip steel.
Preferably, in order to improve the bonding tightness of the first coating and the matrix, the spraying method further comprises the working procedures of cold press molding and rust removal of the strip steel.
Preferably, cold-press molding the strip steel to obtain a matrix; the rust removing process comprises the following steps: and (3) carrying out acid washing treatment, neutralization treatment and rinsing on the substrate.
Preferably, the acid washing treatment uses a hydrochloric acid solution with a volume concentration of 20-22%, the neutralization treatment uses a sodium hydroxide solution with a mass concentration of 5-10%, and the rinsing treatment uses tap water.
Preferably, in the neutralization treatment, the sodium hydroxide solution is sprayed on the top surface and the bottom surface of the substrate in a spraying mode, so that the substrate is prevented from being damaged on the premise of achieving a certain neutralization effect, and meanwhile, the rinsing load is reduced.
Compared with the prior art, the invention has the beneficial effects that: the invention firstly adopts the modes of twice spraying, twice curing and twice cooling to coat the surface of the substrate, wherein the purpose of the once spraying, the once curing and the once cooling is to fully combine the first coating with the substrate, especially for the substrate with a modeling design, the combination of the first coating and the substrate can be ensured to be tighter, and the defects of the first coating such as bulge and the like caused by modeling are avoided; secondary spraying, secondary curing and secondary cooling can effectively improve the compactness and the homogeneity of being connected between first coating and the second coating, make second coating and first coating effectively protect the breast board jointly. In the invention, the salt spray resistance detection result shows that the longest salt spray resistance time is 720h, and further shows that the use of the spraying method can ensure that the breast board has the advantage of good salt spray resistance and can effectively prolong the service life of the breast board.
Drawings
FIG. 1 is a photograph of the balustrade obtained in example 1.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A multicolor spraying method for a breast board comprises the following steps:
(1) cold-press molding the strip steel to obtain a matrix; conveying the matrix into a pickling tank for pickling, wherein a hydrochloric acid solution with the volume concentration of 21% is placed in the pickling tank, and the time from the matrix entering the pickling tank to the matrix leaving the pickling tank is 5 min; carrying out spraying neutralization treatment on the pickled matrix, wherein during spraying, the matrix is sprayed from the top surface and the bottom surface of the matrix in two directions, sodium hydroxide with the mass concentration of 7% is used for spraying, and the time from the beginning to the end of spraying of the matrix is 7 min; the neutralized matrix enters a rinsing tank, and tap water is used for rinsing, wherein the rinsing time is 10 min;
(2) carrying out primary spraying, primary curing and primary cooling on the substrate treated in the step (1), wherein the primary curing adopts closed baking, the primary curing temperature is 355 ℃, the thickness of the first coating is controlled to be 7 mu m, and the thickness of the first coating is measured by using a metal thickness gauge according to GB/T18684;
(3) carrying out secondary spraying, secondary curing and secondary cooling on the substrate treated in the step (2), wherein the secondary curing adopts closed baking, the secondary curing temperature is 330 ℃, the total thickness of the first coating and the second coating is controlled to be 18 mu m, and the total thickness of the coatings is measured by using a metal thickness gauge according to GB/T18684; after treatment, blanking to obtain a breast board; as can be seen by combining the figure 1, the surface of the breast board has uniform color, gorgeous and vivid color and good coating effect.
The salt spray resistance and the impact resistance of the breast board are detected, the salt spray resistance time of the breast board is 720h, and the impact resistance is 50kg cm (detected according to GB/T1732-1993).
Example 2
A multicolor spraying method for a breast board comprises the following steps:
(1) cold-press molding the strip steel to obtain a matrix; conveying the matrix into a pickling tank for pickling, wherein a hydrochloric acid solution with the volume concentration of 22% is placed in the pickling tank, and the time from the matrix entering the pickling tank to the matrix leaving the pickling tank is 3 min; carrying out spraying neutralization treatment on the pickled matrix, wherein during spraying, the matrix is sprayed from the top surface and the bottom surface of the matrix in two directions, sodium hydroxide with the mass concentration of 10% is used for spraying, and the time from the beginning to the end of spraying of the matrix is 3 min; the neutralized matrix enters a rinsing tank, and tap water is used for rinsing, wherein the rinsing time is 15 min;
(2) carrying out primary spraying, primary curing and primary cooling on the substrate treated in the step (1), wherein the primary curing adopts closed baking, the primary curing temperature is 360 ℃, the thickness of the first coating is controlled to be 8 mu m, and the thickness of the first coating is measured by using a metal thickness gauge according to GB/T18684;
(3) performing secondary spraying, secondary curing and secondary cooling on the substrate treated in the step (2), wherein the secondary curing adopts closed baking, the secondary curing temperature is 340 ℃, the total thickness of the first coating and the second coating is controlled to be 20 mu m, and the total thickness of the coatings is measured by using a metal thickness gauge according to GB/T18684; and after treatment, blanking to obtain the breast board.
The salt spray resistance and the impact resistance of the breast board are detected, the salt spray resistance time of the breast board is 720h, and the impact resistance is 50kg cm.
Example 3
A multicolor spraying method for a breast board comprises the following steps:
(1) cold-press molding the strip steel to obtain a matrix; conveying the matrix into a pickling tank for pickling, wherein a hydrochloric acid solution with the volume concentration of 20% is placed in the pickling tank, and the time from the matrix entering the pickling tank to the matrix leaving the pickling tank is 7 min; carrying out spraying neutralization treatment on the pickled matrix, wherein during spraying, the matrix is sprayed from the top surface and the bottom surface of the matrix in two directions, sodium hydroxide with the mass concentration of 5% is used for spraying, and the time from the beginning to the end of spraying of the matrix is 4 min; the neutralized matrix enters a rinsing tank, and the rinsing is carried out by using tap water, wherein the rinsing time is 13 min;
(2) carrying out primary spraying, primary curing and primary cooling on the substrate treated in the step (1), wherein the primary curing adopts closed baking, the primary curing temperature is 350 ℃, the thickness of the first coating is controlled to be 6 mu m, and the thickness of the first coating is measured by using a metal thickness gauge according to GB/T18684;
(3) performing secondary spraying, secondary curing and secondary cooling on the substrate treated in the step (2), wherein the secondary curing adopts closed baking, the secondary curing temperature is 320 ℃, the total thickness of the first coating and the second coating is controlled to be 12 mu m, and the total thickness of the coatings is measured by using a metal thickness gauge according to GB/T18684; and after treatment, blanking to obtain the breast board.
The salt spray resistance and the impact resistance of the breast board are detected, the salt spray resistance time of the breast board is 700h, and the impact resistance is 50kg cm.
Comparative example 1
The difference from example 1 is that the thickness of the first coating layer was controlled to 10 μm.
The salt spray resistance and the impact resistance of the breast board are detected, the salt spray resistance time of the breast board is 680h, and the impact resistance is 35kg cm.
Comparative example 2
The difference from example 1 is that the total thickness of the second coating layer and the first coating layer was controlled to be 25 μm.
The salt spray resistance and the impact resistance of the breast board are detected, the salt spray resistance time of the breast board is 700h, and the impact resistance is 30kg cm.
Comparing the test results of example 1 with those of comparative examples 1 and 2, it can be seen that the thickness of the coating layer has an important influence on the performance of the balustrade, and the impact resistance of the balustrade is reduced when the total thickness of the coating layer is increased, which means that the elongation of the coating layer is affected after the thickness of the coating layer is increased, resulting in the reduction of the impact resistance, and therefore, it is important to control the total thickness of the coating layer and the thickness of the first coating layer.
Although the present invention has been described in detail by referring to the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A multicolor spraying method for a breast board is characterized by mainly comprising the steps of spraying a substrate once, solidifying once and cooling once; carrying out secondary spraying, secondary curing and secondary cooling on the matrix;
after primary cooling, the thickness of the first coating is 6-8 μm;
after the second cooling, the total thickness of the second coating and the first coating is between 12 and 20 mu m.
2. The multicolor spray coating method for a breast board according to claim 1, wherein the primary curing and the secondary curing are both sintering curing.
3. The multi-color spraying method for a balustrade of claim 2, wherein the sintering and curing process is a closed baking, the primary curing temperature is 350-360 ℃, and the secondary curing temperature is 320-340 ℃.
4. The multicolor spray coating method for a breast board according to claim 1, wherein said substrate is a steel strip.
5. The multicolor spray coating method for a breast board according to claim 1, wherein the spray coating method further comprises a cold press molding of the strip steel and a rust removing process.
6. The multicolor spray coating method for a breast board according to claim 5, wherein the strip steel is cold-press molded to obtain a substrate; the rust removing process comprises the following steps: and (3) carrying out acid washing treatment, neutralization treatment and rinsing on the substrate.
7. The multicolor spray coating method for a breast board according to claim 6, wherein a hydrochloric acid solution having a volume concentration of 20 to 22% is used in the pickling treatment, a sodium hydroxide solution having a mass concentration of 5 to 10% is used in the neutralization treatment, and tap water is used for rinsing.
8. The multicolor spray coating method for a breast board according to claim 6 or 7, wherein the sodium hydroxide solution is sprayed on the top and bottom surfaces of the substrate in a spraying manner in the neutralization treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110687704.0A CN113369114A (en) | 2021-06-21 | 2021-06-21 | Multicolor spraying method for breast board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110687704.0A CN113369114A (en) | 2021-06-21 | 2021-06-21 | Multicolor spraying method for breast board |
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| Publication Number | Publication Date |
|---|---|
| CN113369114A true CN113369114A (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110687704.0A Withdrawn CN113369114A (en) | 2021-06-21 | 2021-06-21 | Multicolor spraying method for breast board |
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| CN (1) | CN113369114A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114405783A (en) * | 2022-01-28 | 2022-04-29 | 天津市久跃科技有限公司 | Spraying method for spraying welding part of guide plate die |
-
2021
- 2021-06-21 CN CN202110687704.0A patent/CN113369114A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114405783A (en) * | 2022-01-28 | 2022-04-29 | 天津市久跃科技有限公司 | Spraying method for spraying welding part of guide plate die |
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Application publication date: 20210910 |
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