CN102139264A - Polyvinylidene fluoride (PVDF) coating process for aluminum curtain wall - Google Patents
Polyvinylidene fluoride (PVDF) coating process for aluminum curtain wall Download PDFInfo
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- CN102139264A CN102139264A CN2010191460016A CN201019146001A CN102139264A CN 102139264 A CN102139264 A CN 102139264A CN 2010191460016 A CN2010191460016 A CN 2010191460016A CN 201019146001 A CN201019146001 A CN 201019146001A CN 102139264 A CN102139264 A CN 102139264A
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Abstract
The invention relates to a polyvinylidene fluoride (PVDF) coating process for an aluminum curtain wall, which comprises a pretreatment flow and a spraying flow. The spraying flow comprises the following steps of: (1) making a pretreated aluminum plate go online; (2) manually spraying primer at a reverse side: spraying the primer at one side of a back automatic spraying system of the aluminum plate by using a hand spray gun; (3) automatically spraying the primer; (4) leveling the aluminum plate subjected to primer spraying; (5) drying the primer at the temperature between 180 DEG C and 250 DEG C, wherein the drying time is 10-20 minutes; (6) manually spraying a finishing coat at the reverse side; (7) automatically spraying the finishing coat; (8) leveling the aluminum plate subjected to finishing coat spraying; (9) manually spraying varnish at the reverse side; (10) automatically spraying the varnish; (11) leveling the aluminum plate subjected to varnish spraying; (12) drying the aluminum plate at the temperature between 230 DEG C and 250 DEG C for 10-20 minutes; (13) cooling the aluminum plate; (14) testing and appliqueing the cooled aluminum plate to form the aluminum curtain wall; and (15) going offline. The invention provides the PVDF coating process for the aluminum curtain wall of which a coating is not easy to peel off and fall off.
Description
Technical field
The present invention relates to a kind of fluorocarbon-sprayed technology of Aluminum curtain wall plate.
Background technology
Aluminum curtain wall plate is that building is safeguarded outward, the external structure body of wall, have that body is light and handy, handsome in appearance, advantage such as rich color, easy for installation, short construction period, its advantage is more outstanding after particularly applying protective paint with fluorine carbon spray bake mode, its color of fluorocarbon baking varnish can be chosen wantonly, and colour-fast for many years, do not chap, anti-pollution, acid and alkali-resistance, because fluorocarbon-sprayed Aluminum curtain wall plate has above-mentioned plurality of advantages, so be extensive use of in building trade.Usually, after aluminium sheet carries out pre-treatment, adopt the spraying coating process of " three are coated with bakes ", i.e. primer spray → levelling → topcoating → levelling → spray finishing varnish → levelling → curing.
Usually, the normal temperature levelling is promptly gone up finish paint behind the spraying priming paint, one of effect of priming paint is the bond strength that improves coating and aluminium sheet, if priming paint is not done and is promptly gone up finish paint, can cause topcoat and surface of aluminum plate bonding poor, produce the flaky phenomenon of Aluminum curtain wall plate coating, in follow-up cut erosion test, because topcoat and metal surface are bonding poor, coating also might be glued.
Generally, (priming paint, finish paint, finishing varnish) employing high-pressure electrostatic spray gun that sprays paint for three times carries out the single or double spraying, actual conditions according to fluorocarbon-sprayed production line, the employing high-pressure electrostatic spray gun that has carries out double-face spray painting, the employing high-pressure electrostatic spray gun that has carries out the single face spraying, and reverse side then adopts the manual spray gun spraying.And position, high pressure electrostatic painting corner is because point effect, the charge density height, and it is thicker that deposition is filmed, the spray of lacquer is dropped down, the sagging phenomenon so be easy to generate at the position, corner; And the workpiece of complicated shape is subjected to the influence of electric field shielding or non-uniform electric, may make the part produce not japanning or the japanning non-uniform phenomenon occurs.
Summary of the invention
For the problems referred to above that the fluorocarbon-sprayed technology that solves existing Aluminum curtain wall plate exists, the present invention proposes a kind of coating incrust, glue, japanning evenly, can avoid spraying drop down, the fluorocarbon-sprayed technology of the Aluminum curtain wall plate of sagging phenomenon.
The present invention adopts following technical scheme:
A kind of fluorocarbon-sprayed technology of Aluminum curtain wall plate comprises pre-treatment flow process and spraying flow process, and described pre-treatment flow process comprises successively: washing, pre-degreasing, degreasing, washing, chromaking, washing, draining, dehydration, following part; Described spraying flow process may further comprise the steps:
(1) reaches the standard grade through the aluminium sheet of pre-treatment;
(2) manual reverse side primer spray: one side of the automatic spraying system dorsad of aluminium sheet is carried out the priming paint spraying by manual spray gun;
(3) automatic primer spray: in the traveling process that hangs induction system, the high-pressure electrostatic spray gun of automatic spraying system carries out the priming paint spraying to the side towards automatic spraying system of aluminium sheet under the control of PLC controller;
(4) to the aluminium sheet levelling behind the primer spray;
(5) manual reverse side topcoating: one side of the automatic spraying system dorsad of aluminium sheet is carried out the finish paint spraying by manual spray gun;
(6) automatic topcoating: in the traveling process that hangs induction system, the high-pressure electrostatic spray gun of automatic spraying system carries out the finish paint spraying to the side towards automatic spraying system of aluminium sheet under the control of PLC controller;
(7) to the aluminium sheet levelling behind the topcoating;
(8) manually reverse side sprays finishing varnish: by manual spray gun one side of the automatic spraying system dorsad of aluminium sheet is carried out the finishing varnish spraying;
(9) spray finishing varnish automatically: in the traveling process that hangs induction system, the high-pressure electrostatic spray gun of automatic spraying system carries out the finishing varnish spraying to the side towards automatic spraying system of aluminium sheet under the control of PLC controller;
(10) to the aluminium sheet levelling behind the spray finishing varnish;
(11) under 230～250 ℃, aluminium sheet is dried 10～20min;
(12) cooling;
(13) cooled aluminium sheet is tested and applique, form Aluminum curtain wall plate;
(14) roll off the production line;
It is characterized in that: between the step (4) of described spraying flow process and step (5), add step: under 180～250 ℃ of conditions to the priming paint oven dry, drying time 10～20min, the oven dry temperature difference is not higher than 3 ℃.
Further, between the step (6) of described spraying flow process and step (7), add step: local manual the filling spray of the high-pressure electrostatic spray gun spraying side of aluminium sheet being carried out finish paint; Between the step (9) of described spraying flow process and step (10), add step: local manual the filling spray of the high-pressure electrostatic spray gun spraying side of aluminium sheet being carried out finishing varnish.
Technical conceive of the present invention is: carry out 180～250 ℃ of oven dry under the condition behind spraying priming paint and the levelling, just go up finish paint afterwards, can avoid not causing topcoat and surface of aluminum plate bonding poor because of priming paint is dried, the flaky phenomenon of Aluminum curtain wall plate coating, in follow-up cut erosion test, coating also is difficult for being glued; By carry out local manual the filling spray of finish paint and finishing varnish in the high-pressure electrostatic spray gun spraying side of aluminium sheet, improved position, high pressure electrostatic painting corner because the deposition that point effect is brought is filmed thicker, the spray that the position, corner is easy to generate lacquer is dropped down, the phenomenon of sagging, and the part produces not japanning or the japanning non-uniform phenomenon occurs.
Beneficial effect of the present invention is: proposed a kind of coating incrust, glue, japanning evenly, can avoid spraying drop down, the fluorocarbon-sprayed technology of the Aluminum curtain wall plate of sagging phenomenon.
The specific embodiment
The fluorocarbon-sprayed production line of Aluminum curtain wall plate in the present embodiment, comprise preprocessing system, hang induction system, automatic spraying system, moisture drying system, described automatic spraying system is positioned at and hangs the one-sided of induction system, and described automatic spraying system comprises PLC controller and high-pressure electrostatic spray gun.Described preprocessing system comprises Degreasing Area Stage 1, degreasing bath, chromaking groove.
The fluorocarbon-sprayed Production Line technology of above-mentioned Aluminum curtain wall plate, comprise pre-treatment flow process and spraying flow process, described pre-treatment flow process may further comprise the steps: aluminium sheet to be processed is carried out pre-treatment, earlier aluminium is washed 1min, carry out pre-degreasing and degreasing again, 40～55 ℃ of pre-skimming temps, pre-degreasing time 1min, 40～55 ℃ of skimming temps, degreasing time 3min, once wash 1min, secondary water washing 1min after the degreasing; Carry out chromaking again and handle, 20～40 ℃ of chromaking temperature, chromaking time 2.5min once washes 1min, secondary water washing 1min after the chromaking; And then draining 5min, the 10min that dewaters afterwards, dehydration is to carry out being not more than under 100 ℃ the condition, dewatering time 10min descends part at last.
By above-mentioned surface treatment, improve the antiseptic and rustproof performance of filming on the one hand, prolong the service life of filming; Improve the adhesive force of filming on the other hand, can make aluminium sheet obtain uniform film performance in addition.
Described spraying flow process may further comprise the steps:
(1) reaches the standard grade through the aluminium sheet of pre-treatment;
(2) manual reverse side primer spray: one side of the automatic spraying system dorsad of aluminium sheet is carried out the priming paint spraying by manual spray gun; Because in this production line, automatic spraying system is positioned at and hangs the one-sided of induction system, adopt manual spray gun manually to fill spray so spray the another side of aluminium sheet automatically.Following topcoating, finishing varnish are also in like manner.
(3) automatic primer spray: in the traveling process that hangs induction system, the high-pressure electrostatic spray gun of automatic spraying system carries out the priming paint spraying to the side towards automatic spraying system of aluminium sheet under the control of PLC controller;
The effect of above-mentioned priming paint spraying is to improve coating impermeabilisation ability, strengthens the protection to aluminium sheet, stablize the surface of aluminum plate layer, strengthens the adhesive force of finish paint and surface of aluminum plate in the continuous step down, the color homogeneity of assurance topcoat.The thickness of prime coat is generally 5～8 μ m.
(4) to the aluminium sheet levelling behind the primer spray, flow time 8min; It is the process of solvent or water evaporates in the coating that levelling dries, and makes coating reach the state that can spray again.
(5) under 180～250 ℃ of conditions, priming paint is dried, drying time 10～20min, the oven dry temperature difference is not higher than 3 ℃;
(6) manual reverse side topcoating: one side of the automatic spraying system dorsad of aluminium sheet is carried out the finish paint spraying by manual spray gun;
(7) automatic topcoating: in the traveling process that hangs induction system, the high-pressure electrostatic spray gun of automatic spraying system carries out the finish paint spraying to the side towards automatic spraying system of aluminium sheet under the control of PLC controller;
Above-mentioned finish paint spraying provides the needed decorative colors of aluminium sheet, and the protection surface of aluminum plate is not subjected to the erosion of external environment atmosphere, acid rain, pollutant, prevents that ultraviolet ray from penetrating, and strengthens ageing resistance.Top coat layer thickness is generally 20～25 μ m.
(8) the high-pressure electrostatic spray gun spraying side of aluminium sheet being carried out the local of finish paint fills spray by hand;
(9) to the aluminium sheet levelling behind the topcoating, flow time 10min;
(10) manually reverse side sprays finishing varnish: by manual spray gun one side of the automatic spraying system dorsad of aluminium sheet is carried out the finishing varnish spraying;
(11) spray finishing varnish automatically: in the traveling process that hangs induction system, the high-pressure electrostatic spray gun of automatic spraying system carries out the finishing varnish spraying to the side towards automatic spraying system of aluminium sheet under the control of PLC controller;
Above-mentioned finishing varnish spraying main purpose is to strengthen the anti-extraneous erosiveness of enamelled coating effectively, the protective surface lacquer coat, and the gloss of increase finish paint color makes outward appearance color clear more.The finishing varnish layer thickness is generally 12～15 μ m.
(12) the high-pressure electrostatic spray gun spraying side of aluminium sheet being carried out the local of finishing varnish fills spray by hand;
(13) to the aluminium sheet levelling behind the spray finishing varnish, flow time 12min;
(14) under 230～250 ℃, aluminium sheet is dried 10～20min; The baking-curing of coating is fluorocarbon resin fusion, the process that chemical reaction takes place, and it makes the hardening of filming, wear-resisting wiping.
(15) cooling naturally is not less than 20min cool time;
(16) cooled aluminium sheet is tested and applique, form Aluminum curtain wall plate;
(17) roll off the production line.
In this programme, by behind spraying priming paint and levelling, carrying out 180～250 ℃ of oven dry under the condition, just go up finish paint afterwards, can avoid not causing topcoat and surface of aluminum plate bonding poor because of priming paint is dried, the flaky phenomenon of Aluminum curtain wall plate coating, in follow-up cut erosion test, coating also Xiao Yi is glued; By carry out local manual the filling spray of finish paint and finishing varnish in the high-pressure electrostatic spray gun spraying side of aluminium sheet, improved position, high pressure electrostatic painting corner because the deposition that point effect is brought is filmed thicker, the spray that the position, corner is easy to generate lacquer is dropped down, the phenomenon of sagging, and the part produces not japanning or the japanning non-uniform phenomenon occurs.
Claims (2)
1. the fluorocarbon-sprayed technology of an Aluminum curtain wall plate comprises pre-treatment flow process and spraying flow process, and described pre-treatment flow process comprises successively: washing, pre-degreasing, degreasing, washing, chromaking, washing, draining, dehydration, following part; Described spraying flow process may further comprise the steps:
(1) reaches the standard grade through the aluminium sheet of pre-treatment;
(2) manual reverse side primer spray: one side of the automatic spraying system dorsad of aluminium sheet is carried out the priming paint spraying by manual spray gun;
(3) automatic primer spray: in the traveling process that hangs induction system, the high-pressure electrostatic spray gun of automatic spraying system carries out the priming paint spraying to the side towards automatic spraying system of aluminium sheet under the control of PLC controller;
(4) to the aluminium sheet levelling behind the primer spray;
(5) manual reverse side topcoating: one side of the automatic spraying system dorsad of aluminium sheet is carried out the finish paint spraying by manual spray gun;
(6) automatic topcoating: in the traveling process that hangs induction system, the high-pressure electrostatic spray gun of automatic spraying system carries out the finish paint spraying to the side towards automatic spraying system of aluminium sheet under the control of PLC controller;
(7) to the aluminium sheet levelling behind the topcoating;
(8) manually reverse side sprays finishing varnish: by manual spray gun one side of the automatic spraying system dorsad of aluminium sheet is carried out the finishing varnish spraying;
(9) spray finishing varnish automatically: in the traveling process that hangs induction system, the high-pressure electrostatic spray gun of automatic spraying system carries out the finishing varnish spraying to the side towards automatic spraying system of aluminium sheet under the control of PLC controller;
(10) to the aluminium sheet levelling behind the spray finishing varnish;
(11) under 230～250 ℃, aluminium sheet is dried 10～20min;
(12) cooling;
(13) cooled aluminium sheet is tested and applique, form Aluminum curtain wall plate;
(14) roll off the production line;
It is characterized in that: between the step (4) of described spraying flow process and step (5), add step: under 180～250 ℃ of conditions to the priming paint oven dry, drying time 10～20min, the oven dry temperature difference is not higher than 3 ℃.
2. the fluorocarbon-sprayed technology of Aluminum curtain wall plate as claimed in claim 1 is characterized in that: add step between the step (6) of described spraying flow process and step (7): local manual the filling spray of the high-pressure electrostatic spray gun spraying side of aluminium sheet being carried out finish paint; Between the step (9) of described spraying flow process and step (10), add step: local manual the filling spray of the high-pressure electrostatic spray gun spraying side of aluminium sheet being carried out finishing varnish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010191460016A CN102139264A (en) | 2010-02-02 | 2010-02-02 | Polyvinylidene fluoride (PVDF) coating process for aluminum curtain wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010191460016A CN102139264A (en) | 2010-02-02 | 2010-02-02 | Polyvinylidene fluoride (PVDF) coating process for aluminum curtain wall |
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| CN2010191460016A Pending CN102139264A (en) | 2010-02-02 | 2010-02-02 | Polyvinylidene fluoride (PVDF) coating process for aluminum curtain wall |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423753A (en) * | 2011-10-21 | 2012-04-25 | 许浩洪 | Surface treatment process (fluorine-carbon spraying) for carrying out lasers on metal surface |
| CN104174567A (en) * | 2014-08-30 | 2014-12-03 | 长城汽车股份有限公司 | Method for testing film coating thickness of automobile spraying 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 |
| CN105039963A (en) * | 2015-06-25 | 2015-11-11 | 刘瑜 | Aluminum section bar surface structure and method for compounding ceramic coating on aluminum section bar surface |
| CN107470080A (en) * | 2016-02-26 | 2017-12-15 | 安徽工业大学 | A kind of application method of metal tube hot spraying device |
| CN109127248A (en) * | 2018-11-06 | 2019-01-04 | 广东江晟铝业有限公司 | A kind of spraying aluminum profile production line |
| CN112012379A (en) * | 2020-08-14 | 2020-12-01 | 厦门特房建设工程集团有限公司 | Aluminum pipe connecting structure, special-shaped aluminum pipe curtain wall and construction method of special-shaped aluminum pipe curtain wall |
| CN112049375A (en) * | 2020-09-29 | 2020-12-08 | 杭州麦查居家具有限公司 | Spraying equipment for joints of indoor walls and walls |
| CN117563810A (en) * | 2024-01-16 | 2024-02-20 | 江苏海德曼新材料股份有限公司 | Intelligent monitoring control system for fluorocarbon aluminum veneer manufacturing and spraying |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423753A (en) * | 2011-10-21 | 2012-04-25 | 许浩洪 | Surface treatment process (fluorine-carbon spraying) for carrying out lasers on metal surface |
| 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 |
| 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 |
| CN104174567A (en) * | 2014-08-30 | 2014-12-03 | 长城汽车股份有限公司 | Method for testing film coating thickness of automobile spraying process |
| CN104174567B (en) * | 2014-08-30 | 2016-03-02 | 长城汽车股份有限公司 | A kind of method of debugging vehicle spray painting operation coating film thickness |
| CN105039963A (en) * | 2015-06-25 | 2015-11-11 | 刘瑜 | Aluminum section bar surface structure and method for compounding ceramic coating on aluminum section bar surface |
| CN107470080A (en) * | 2016-02-26 | 2017-12-15 | 安徽工业大学 | A kind of application method of metal tube hot spraying device |
| CN107470080B (en) * | 2016-02-26 | 2019-08-16 | 安徽工业大学 | A kind of application method of metal tube hot spraying device |
| CN109127248A (en) * | 2018-11-06 | 2019-01-04 | 广东江晟铝业有限公司 | A kind of spraying aluminum profile production line |
| CN112012379A (en) * | 2020-08-14 | 2020-12-01 | 厦门特房建设工程集团有限公司 | Aluminum pipe connecting structure, special-shaped aluminum pipe curtain wall and construction method of special-shaped aluminum pipe curtain wall |
| CN112012379B (en) * | 2020-08-14 | 2022-05-03 | 厦门特房建设工程集团有限公司 | Aluminum pipe connecting structure, special-shaped aluminum pipe curtain wall and construction method of special-shaped aluminum pipe curtain wall |
| CN112049375A (en) * | 2020-09-29 | 2020-12-08 | 杭州麦查居家具有限公司 | Spraying equipment for joints of indoor walls and walls |
| CN117563810A (en) * | 2024-01-16 | 2024-02-20 | 江苏海德曼新材料股份有限公司 | Intelligent monitoring control system for fluorocarbon aluminum veneer manufacturing and spraying |
| CN117563810B (en) * | 2024-01-16 | 2024-03-29 | 江苏海德曼新材料股份有限公司 | Intelligent monitoring control system for fluorocarbon aluminum veneer manufacturing and spraying |
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Application publication date: 20110803 |