CN103203307A - Production technique of fluorocarbon paint coated profiles - Google Patents
Production technique of fluorocarbon paint coated profiles Download PDFInfo
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- CN103203307A CN103203307A CN2013101017448A CN201310101744A CN103203307A CN 103203307 A CN103203307 A CN 103203307A CN 2013101017448 A CN2013101017448 A CN 2013101017448A CN 201310101744 A CN201310101744 A CN 201310101744A CN 103203307 A CN103203307 A CN 103203307A
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- section bar
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- spraying
- degreasing
- fluorine carbon
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Abstract
The invention relates to a production technique of fluorocarbon paint coated profiles. The production technique includes a surface pretreatment step and a coating step. The surface pretreatment step includes: A1, degreasing; A2, washing firstly; A3, neutralizing; A4, washing secondly; A5, passivating to obtain a passivated film: passivating the surface of profiles at the temperature of 45-55 DEG C to obtain a passivated film 0.5-2micrometers in thickness; A6, washing thirdly; and A7, drying. The coating step includes: B1, feeding profiles; B2, coating fluorocarbon paint to obtain a coating layer 40-60micrometers in thickness; B3, drying and curing; and B4, cooling and discharging profiles. The production technique has the advantages that surface quality of finished products is high, the coating layer is less prone to peeling off, painting is uniform, the profiles are subjected to surface treatment before coating of a powder layer, and the powder layer is higher in adhesion force, and the coating layer is less prone to peeling off.
Description
Technical field
The present invention relates to a kind of spraying coating process of section bar finish paint, particularly the production technology of fluorine carbon lacquer spraying section bar.
Background technology
At present, shape is widely used in building trade with the characteristics of its excellent durability, ornamental and processing forming.And aluminium section bar is because of characteristics such as its excellent processing performance, light weights, account for more than 80% of shape consumption, especially the aluminium building materials of powdery paints, compare with anodic oxidation, electrophoretic painting surface treatment method, pollution level, energy consumption to water and atmosphere obviously reduce, and indexs such as the mechanical performance of filming such as hardness, wearability, acid resistance but significantly improve, and exceed one times than common model machine oxidation aluminium service life, and rich color more can embody variation, the personalization of building.At present, domestic spraying coating process major part is to adopt electrostatic painting process, connect high voltage negative at gun head metal spray cup and utmost point pin, formed positive pole by the spraying workpiece grounding, make and form a stronger static electric field between spray gun and the workpiece, when as the compressed air of carrier gas with powdery paints from powder barrel when tube cell is delivered to the spray gun of spray gun and utmost point pin, because it connects the corona discharge that high voltage negative produces, produced intensive negative electrical charge in its vicinity, and make negative electrical charge on the powder belt, under the double action of electrostatic force and carrier gas motive force, the powder ground connection surface of the work that circles in the air equably, form the uniform bisque of thickness, again heating and melting and be solidified into durable filming.
Before carrying out spraying operation, the section bar surface preparation procedure that is absolutely necessary, the surface-treated purpose is to remove greasy dirt and the natural oxide film on section bar surface, obtains one deck passivating film by chemical oxidation again, and the adhesive force of powder coating is strengthened greatly.The quality of section bar surface preparation directly has influence on the coating quality of finish paint, if degreasing is unclean, oil removing will not cause all thoroughly that passivating film is imperfect, bisque adheres to bad, and the surface easily produces defectives such as shrinkage cavity, pin hole, and from then on the section bar corrosion will begin and spread.Chinese patent: application number is that 201110217248.X discloses a kind of aluminium sheet spraying coating process, and this technology is direct primer spray, topcoating and spray finishing varnish on the section bar surface, carries out hot setting then.Though such technology step is simple, easy to process, the section bar weatherability is not strong, and bisque adheres to insecure, and the section bar corrosion is fast.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, the production technology of provide a kind of finished surface quality height, coating is incrust and the uniform fluorine carbon of japanning coats with lacquer the spraying section bar, before the spraying bisque, carry out the section bar surface preparation, make that the adhesive force of bisque is stronger, reach the incrust effect of coating.
Purpose of the present invention is achieved through the following technical solutions: the production technology of fluorine carbon lacquer spraying section bar, and it comprises surface preparation step and spraying step:
Described surface preparation, it comprises following substep:
A1, degreasing: section bar is put into alkaline degreasing bath, degreasing 5min～8min, the control temperature is 45 ℃～55 ℃;
A2, washing for the first time: the section bar after the degreasing is cleaned 2min～6min with running water, make pH value≤8 on section bar surface;
A3, neutralization: it is rare nitric acid groove of 5%～8% that section bar is put into concentration, takes out behind 2min～3min;
A4, washing for the second time: clean section bar surface 2min～6min with running water, make pH value 〉=5 on section bar surface;
A5, passivation obtain passivating film: be under 45 ℃～55 ℃ the environment, Passivation Treatment to be carried out on the section bar surface in temperature, obtain the passivating film of 0.5 μ m～2 μ m;
A6, washing for the third time: clean section bar surface 1min～3min with running water earlier, clean section bar surface 1min～3min with pure water again;
A7, drying: section bar is put into baking oven, oven dry 15min～25min, the control temperature is 100 ℃～120 ℃;
Described spraying step, it comprises following substep again:
B1, last part: will hang on the hanger equably through the section bar of surface preparation;
B2, spraying fluorine carbon lacquer: with spray gun spraying fluorine carbon lacquer, coating layer thickness is 40 μ m～60 μ m on the section bar surface;
B3, baking and curing: section bar is cured processing, and design temperature is 180 ℃～250 ℃, and be 15min～25min hardening time;
B4, cooling be part down: after section bar is cooled to room temperature, and following part.
The concentration of described alkaline defatting agent is 2%～5%.
Described step B2 comprises primer spray, topcoating and spray finishing varnish.
The present invention has the following advantages:
1, carry out surface preparation earlier, spray fluorine carbon lacquer again, the surface smoothness height of finished product, appearance effect is good.
2, before the spraying bisque, carry out the section bar surface preparation, make that the adhesive force of bisque is stronger, reach the incrust effect of coating.
3, by the spraying of high-pressure electrostatic spray gun, divide and spray paint for three times, improved the thicker problem of the surplus film of deposition that bring owing to point effect at position, high pressure electrostatic painting corner, japanning is even, and color is unified.
The specific embodiment
The present invention will be further described below in conjunction with embodiment, but protection scope of the present invention is not limited to the following stated.
[embodiment 1]:
The production technology of fluorine carbon lacquer spraying section bar, it comprises surface preparation step and spraying step:
Described surface preparation, it comprises following substep:
A1, degreasing: section bar is put into alkaline degreasing bath, and the concentration of alkaline defatting agent is 2%, degreasing 5min, and the control temperature is 55 ℃;
A2, washing for the first time: the section bar after the degreasing is cleaned 2min with running water, make pH value≤8 on section bar surface;
A3, neutralization: it is rare nitric acid groove of 8% that section bar is put into concentration, takes out behind the 2min;
A4, washing for the second time: clean section bar surface 6min with running water, make pH value 〉=5 on section bar surface;
A5, passivation obtain passivating film: be under 55 ℃ the environment, Passivation Treatment to be carried out on the section bar surface in temperature, obtain the passivating film of 0.5 μ m;
A6, washing for the third time: clean section bar surface 3min with running water earlier, clean section bar surface 1min with pure water again;
A7, drying: section bar is put into baking oven, oven dry 25min, the control temperature is 100 ℃;
Described spraying step, it comprises following substep again:
B1, last part: will hang on the hanger equably through the section bar of surface preparation;
B2, spraying fluorine carbon lacquer: with spray gun spraying fluorine carbon lacquer, coating layer thickness is 60 μ m on the section bar surface;
B3, baking and curing: section bar is cured processing, and design temperature is 250 ℃, and be 15min hardening time;
B4, cooling be part down: after section bar is cooled to room temperature, and following part.
Described step B2 comprises primer spray, topcoating and spray finishing varnish.
[embodiment 2]:
The production technology of fluorine carbon lacquer spraying section bar, it comprises surface preparation step and spraying step:
Described surface preparation, it comprises following substep:
A1, degreasing: section bar is put into alkaline degreasing bath, and the concentration of alkaline defatting agent is 3%, degreasing 6.5min, and the control temperature is 50 ℃;
A2, washing for the first time: the section bar after the degreasing is cleaned 4min with running water, make pH value≤8 on section bar surface;
A3, neutralization: it is rare nitric acid groove of 7% that section bar is put into concentration, takes out behind the 2.5min;
A4, washing for the second time: clean section bar surface 4min with running water, make pH value 〉=5 on section bar surface;
A5, passivation obtain passivating film: be under 50 ℃ the environment, Passivation Treatment to be carried out on the section bar surface in temperature, obtain the passivating film of 1.5 μ m;
A6, washing for the third time: clean section bar surface 2min with running water earlier, clean section bar surface 2min with pure water again;
A7, drying: section bar is put into baking oven, oven dry 20min, the control temperature is 110 ℃;
Described spraying step, it comprises following substep again:
B1, last part: will hang on the hanger equably through the section bar of surface preparation;
B2, spraying fluorine carbon lacquer: with spray gun spraying fluorine carbon lacquer, coating layer thickness is 50 μ m on the section bar surface;
B3, baking and curing: section bar is cured processing, and design temperature is 210 ℃, and be 20min hardening time;
B4, cooling be part down: after section bar is cooled to room temperature, and following part.
Described step B2 comprises primer spray, topcoating and spray finishing varnish.
[embodiment 3]:
The production technology of fluorine carbon lacquer spraying section bar, it comprises surface preparation step and spraying step:
Described surface preparation, it comprises following substep:
A1, degreasing: section bar is put into alkaline degreasing bath, and the concentration of alkaline defatting agent is 5%, degreasing 8min, and the control temperature is 45 ℃;
A2, washing for the first time: the section bar after the degreasing is cleaned 6min with running water, make pH value≤8 on section bar surface;
A3, neutralization: it is rare nitric acid groove of 5% that section bar is put into concentration, takes out behind the 3min;
A4, washing for the second time: clean section bar surface 2min with running water, make pH value 〉=5 on section bar surface;
A5, passivation obtain passivating film: be under 45 ℃ the environment, Passivation Treatment to be carried out on the section bar surface in temperature, obtain the passivating film of 2 μ m;
A6, washing for the third time: clean section bar surface 1min with running water earlier, clean section bar surface 3min with pure water again;
A7, drying: section bar is put into baking oven, oven dry 15min, the control temperature is 120 ℃;
Described spraying step, it comprises following substep again:
B1, last part: will hang on the hanger equably through the section bar of surface preparation;
B2, spraying fluorine carbon lacquer: with spray gun spraying fluorine carbon lacquer, coating layer thickness is 40 μ m on the section bar surface;
B3, baking and curing: section bar is cured processing, and design temperature is 180 ℃, and be 25min hardening time;
B4, cooling be part down: after section bar is cooled to room temperature, and following part.
Described step B2 comprises primer spray, topcoating and spray finishing varnish.
Claims (3)
1. fluorine carbon lacquer sprays the production technology of section bar, it is characterized in that: it comprises surface preparation step and spraying step:
Described surface preparation, it comprises following substep:
A1, degreasing: section bar is put into alkaline degreasing bath, degreasing 5min～8min, the control temperature is 45 ℃～55 ℃;
A2, washing for the first time: the section bar after the degreasing is cleaned 2min～6min with running water, make pH value≤8 on section bar surface;
A3, neutralization: it is rare nitric acid groove of 5%～8% that section bar is put into concentration, takes out behind 2min～3min;
A4, washing for the second time: clean section bar surface 2min～6min with running water, make pH value 〉=5 on section bar surface;
A5, passivation obtain passivating film: be under 45 ℃～55 ℃ the environment, Passivation Treatment to be carried out on the section bar surface in temperature, obtain the passivating film of 0.5 μ m～2 μ m;
A6, washing for the third time: clean section bar surface 1min～3min with running water earlier, clean section bar surface 1min～3min with pure water again;
A7, drying: section bar is put into baking oven, oven dry 15min～25min, the control temperature is 100 ℃～120 ℃;
Described spraying step, it comprises following substep again:
B1, last part: will hang on the hanger equably through the section bar of surface preparation;
B2, spraying fluorine carbon lacquer: with spray gun spraying fluorine carbon lacquer, coating layer thickness is 40 μ m～60 μ m on the section bar surface;
B3, baking and curing: section bar is cured processing, and design temperature is 180 ℃～250 ℃, and be 15min～25min hardening time;
B4, cooling be part down: after section bar is cooled to room temperature, and following part.
2. fluorine carbon lacquer according to claim 1 sprays the production technology of section bar, and it is characterized in that: the concentration of described alkaline defatting agent is 2%～5%.
3. fluorine carbon lacquer according to claim 1 sprays the production technology of section bar, and it is characterized in that: described step B2 comprises primer spray, topcoating and spray finishing varnish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013101017448A CN103203307A (en) | 2013-03-27 | 2013-03-27 | Production technique of fluorocarbon paint coated profiles |
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| CN2013101017448A CN103203307A (en) | 2013-03-27 | 2013-03-27 | Production technique of fluorocarbon paint coated profiles |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358343A (en) * | 2014-09-30 | 2015-02-18 | 浙江墙煌建材有限公司 | Water-based organic ceramic sprayed aluminum veneer and manufacturing technology thereof |
| CN104549812A (en) * | 2013-10-21 | 2015-04-29 | 广东澳美铝业有限公司 | Vertical construction aluminum alloy section fluorocarbon paint spraying production equipment and vertical construction aluminum alloy section fluorocarbon paint spraying production process |
| CN104941894A (en) * | 2015-07-13 | 2015-09-30 | 上海金泛斯标识有限公司 | Aluminum profile spraying technology |
| CN105113729A (en) * | 2015-09-02 | 2015-12-02 | 深圳市云宇金属科技有限公司 | Rail material for building decoration and manufacturing method thereof |
| CN105364420A (en) * | 2015-12-14 | 2016-03-02 | 四川成铝铝业科技有限公司 | Processing process of aluminum profile |
| CN105457874A (en) * | 2015-12-10 | 2016-04-06 | 太仓贝斯特机械设备有限公司 | Electrostatic powder spraying method of aluminum material building door and window |
| CN106655014A (en) * | 2017-01-09 | 2017-05-10 | 镇江华中电器有限公司 | Heavy duty anticorrosion surface treatment method for aluminum alloy cable laying device dedicated for the ocean |
| CN107955960A (en) * | 2017-12-07 | 2018-04-24 | 佛山市高明高盛铝业有限公司 | A kind of preparation method of aluminum alloy surface multiple-protection layer |
| CN109675779A (en) * | 2018-12-28 | 2019-04-26 | 广东兴发铝业（河南）有限公司 | A kind of processing method of fluorine carbon dust Spray-painted aluminum profile |
| CN111823666A (en) * | 2020-08-06 | 2020-10-27 | 方大新材料（江西）有限公司 | Copper-aluminum composite decorative plate for building external wall and manufacturing process |
| CN113546827A (en) * | 2021-05-26 | 2021-10-26 | 广东坚美铝型材厂（集团）有限公司 | Preparation method of heat-insulating aluminum alloy profile |
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| CN1817978A (en) * | 2006-03-15 | 2006-08-16 | 湖南大学 | Nanometer fluorocarbon modified coating with titania, its production and process |
| CN101104764A (en) * | 2007-07-17 | 2008-01-16 | 深圳市明远氟涂料有限公司 | Double-anticorrosion paint for steel and preparing method thereof |
| CN101531852A (en) * | 2009-04-13 | 2009-09-16 | 湖南湘江涂料集团有限公司 | Spraying type fluorocarbon metallic paint and application thereof in aluminium alloy sections of buildings |
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Patent Citations (4)
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| JPS6359374A (en) * | 1986-08-28 | 1988-03-15 | Sanyo Electric Co Ltd | Preparation of painted steel plate |
| CN1817978A (en) * | 2006-03-15 | 2006-08-16 | 湖南大学 | Nanometer fluorocarbon modified coating with titania, its production and process |
| CN101104764A (en) * | 2007-07-17 | 2008-01-16 | 深圳市明远氟涂料有限公司 | Double-anticorrosion paint for steel and preparing method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104549812B (en) * | 2013-10-21 | 2017-02-08 | 广东澳美铝业有限公司 | Vertical construction aluminum alloy section fluorocarbon paint spraying production equipment and vertical construction aluminum alloy section fluorocarbon paint spraying production process |
| CN104549812A (en) * | 2013-10-21 | 2015-04-29 | 广东澳美铝业有限公司 | Vertical construction aluminum alloy section fluorocarbon paint spraying production equipment and vertical construction aluminum alloy section fluorocarbon paint spraying production process |
| CN104358343A (en) * | 2014-09-30 | 2015-02-18 | 浙江墙煌建材有限公司 | Water-based organic ceramic sprayed aluminum veneer and manufacturing technology thereof |
| CN104941894A (en) * | 2015-07-13 | 2015-09-30 | 上海金泛斯标识有限公司 | Aluminum profile spraying technology |
| CN104941894B (en) * | 2015-07-13 | 2017-04-12 | 上海金泛斯标识有限公司 | Aluminum profile spraying technology |
| CN105113729A (en) * | 2015-09-02 | 2015-12-02 | 深圳市云宇金属科技有限公司 | Rail material for building decoration and manufacturing method thereof |
| CN105457874A (en) * | 2015-12-10 | 2016-04-06 | 太仓贝斯特机械设备有限公司 | Electrostatic powder spraying method of aluminum material building door and window |
| CN105457874B (en) * | 2015-12-10 | 2018-05-11 | 太仓贝斯特机械设备有限公司 | The electrostatic powder spraying method of aluminium building doors and windows |
| CN105364420A (en) * | 2015-12-14 | 2016-03-02 | 四川成铝铝业科技有限公司 | Processing process of aluminum profile |
| CN105364420B (en) * | 2015-12-14 | 2018-04-10 | 四川成铝铝业科技有限公司 | A kind of aluminium section bar processing technology |
| CN106655014A (en) * | 2017-01-09 | 2017-05-10 | 镇江华中电器有限公司 | Heavy duty anticorrosion surface treatment method for aluminum alloy cable laying device dedicated for the ocean |
| CN107955960A (en) * | 2017-12-07 | 2018-04-24 | 佛山市高明高盛铝业有限公司 | A kind of preparation method of aluminum alloy surface multiple-protection layer |
| CN109675779A (en) * | 2018-12-28 | 2019-04-26 | 广东兴发铝业（河南）有限公司 | A kind of processing method of fluorine carbon dust Spray-painted aluminum profile |
| CN111823666A (en) * | 2020-08-06 | 2020-10-27 | 方大新材料（江西）有限公司 | Copper-aluminum composite decorative plate for building external wall and manufacturing process |
| CN113546827A (en) * | 2021-05-26 | 2021-10-26 | 广东坚美铝型材厂（集团）有限公司 | Preparation method of heat-insulating aluminum alloy profile |
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Application publication date: 20130717 |