CN114011635A - Coating powder spraying line - Google Patents

Coating powder spraying line Download PDF

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Publication number
CN114011635A
CN114011635A CN202111440572.8A CN202111440572A CN114011635A CN 114011635 A CN114011635 A CN 114011635A CN 202111440572 A CN202111440572 A CN 202111440572A CN 114011635 A CN114011635 A CN 114011635A
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CN
China
Prior art keywords
powder spraying
workpiece
sampling
coating
spraying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111440572.8A
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Chinese (zh)
Inventor
张静
吕加鹏
刘汉平
王幸福
道嘎
曾羽燕
雷惊天
高世文
梅延滨
杨力强
谭亮
周启
杜冯锦
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China Railway Construction Heavy Industry Group Co Ltd
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China Railway Construction Heavy Industry Group Co Ltd
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Publication date
Application filed by China Railway Construction Heavy Industry Group Co Ltd filed Critical China Railway Construction Heavy Industry Group Co Ltd
Priority to CN202111440572.8A priority Critical patent/CN114011635A/en
Publication of CN114011635A publication Critical patent/CN114011635A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00Spray booths
    • B05B16/20Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0264Overhead conveying means, i.e. the object or other work being suspended from the conveying means; Details thereof, e.g. hanging hooks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08Plant for applying liquids or other fluent materials to objects
    • B05B5/081Plant for applying liquids or other fluent materials to objects specially adapted for treating particulate materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08Plant for applying liquids or other fluent materials to objects
    • B05B5/082Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects

Abstract

The invention relates to a coating powder spraying line which comprises a pretreatment system, an electrostatic powder spraying system, a curing device and a workpiece conveying device, wherein the electrostatic powder spraying system comprises a powder spraying chamber, a powder supply center, a separation device, an air draft filtering device and a spraying device, the air draft filtering device is communicated with the separation device through a pipeline, the separation device is respectively communicated with the powder spraying chamber and the powder supply center through a three-way pipeline, and the spraying device is arranged in the powder spraying chamber; the workpiece conveying device is provided with an upper workpiece station and a lower workpiece station, and the upper workpiece station, the pretreatment system, the electrostatic powder spraying system, the curing device and the lower workpiece station are sequentially connected in series by the workpiece conveying device to form a closed workpiece circulation loop; the workpiece conveying device connects all parts of the coating powder spraying line in series to form a closed circulation loop, all processes such as pretreatment, powder spraying, curing and the like can be completed in sequence by one-time workpiece feeding, the problem of disjointing does not exist among all processes, the labor intensity can be effectively reduced, and the powder spraying process efficiency is improved.

Description

Coating powder spraying line
Technical Field
The invention relates to the technical field of coating equipment, in particular to a coating powder spraying line.
Background
Along with the upgrading of the industry in China, the requirement of environmental protection policy is increased, and the control on the discharge of VOC waste water and waste gas after coating is more and more strict; the oil paint is changed into the water paint, the high solid content paint is popularized, and the powder paint is an industrial trend; the proportion of the thin plate parts and the small parts in the agricultural machinery products in the whole area is over 70 percent, and the method is suitable for the application of a powder spraying process.
However, in the existing powder spraying process equipment, the pretreatment process and the powder spraying process are disjointed, and the workpiece needs to be manually unloaded from the pretreatment process and moved to the powder spraying process for reloading, so that the labor intensity is increased, and the powder spraying process efficiency is reduced.
Disclosure of Invention
The invention aims to provide a coating powder spraying line, which aims to solve the problem that a pretreatment process and a powder spraying process are disjointed, reduce labor intensity and improve the efficiency of a powder spraying process.
In order to achieve the purpose, the invention provides the following technical scheme:
a coating and powder spraying working line comprising:
the pretreatment system is used for degreasing, cleaning and silanizing the workpiece;
the electrostatic powder spraying system comprises a powder spraying chamber, a powder supply center, a separating device, an air draft filtering device and a spraying device, wherein the air draft filtering device is communicated with the separating device through a pipeline;
the curing device is used for curing the powder coating on the workpiece;
the workpiece conveying device is provided with an upper workpiece station and a lower workpiece station, and the upper workpiece station, the pretreatment system, the electrostatic powder spraying system, the curing device and the lower workpiece station are sequentially connected in series by the workpiece conveying device to form a closed workpiece circulation loop.
Preferably, the pretreatment system comprises a pre-degreasing device, a first cleaning device, a silanization device, a second cleaning device and a drying device which are sequentially arranged along the moving direction of the workpiece.
Preferably, the first cleaning device comprises a first water washing device, a pickling device, a second water washing device and a first pure water washing device which are sequentially arranged along the moving direction of the workpiece.
Preferably, the second cleaning device includes a second pure water washing device, a third pure water washing device, and a water blowing device, which are sequentially disposed in the moving direction of the workpiece.
Preferably, the system also comprises an automatic detection and dosing system, wherein the automatic detection and dosing system comprises a first sampling device, a second sampling device, a third sampling device, a free alkali and total alkali analyzer, a silane pH value analyzer, a silane point analyzer, a degreasing agent supply device, an acid-base regulator supply device, a silane agent supply device and a central control system, the first sampling device is used for sampling from a pre-degreasing tank of the pre-degreasing device, the second sampling device is used for sampling from a degreasing tank of the degreasing device, the third sampling device is used for sampling from the silane tank of the silanization device, the sampling ports of the free alkali and total alkali analyzers are respectively communicated with the output port of the first sampling device and the output port of the second sampling device, the sampling port of the silane pH value analyzer and the sampling port of the silane point analyzer are respectively communicated with the output port of the third sampling device; the signal output ends of the free alkali and total alkali analyzer, the silane pH value analyzer and the silane point analyzer are respectively connected with the signal input end of the central control system, and the signal output end of the central control system is respectively connected with the degreasing agent supply device, the acid-base regulator supply device and the silane agent supply device.
Preferably, liquid level detection devices connected with a signal input end of the central control system are respectively arranged in storage tanks of the degreasing agent supply device, the acid-base regulator supply device and the silane agent supply device, and the central control system sends alarm information when the liquid level detection devices detect that the liquid level is lower than a preset value.
Preferably, the automatic detection and dosing system further comprises a feedback module connected with the central control system, and the feedback module is used for feeding back sampling information, analysis information, material supply information and alarm information in real time.
Preferably, the electrostatic powder spraying system includes a bottom layer powder spraying device and a surface layer powder spraying device which are sequentially arranged along a moving direction of the workpiece, and the bottom layer powder spraying device and the surface layer powder spraying device are respectively provided with the powder supply center, the separating device, the air draft filtering device and the spraying device in a matching manner.
Preferably, the corners of the powder spraying chamber are all of a round corner structure.
Preferably, the coating powder spraying line further comprises a production line PLC, and the production line PLC is respectively connected with the pretreatment system, the electrostatic powder spraying system, the curing device, and the workpiece conveying device.
Preferably, the electrostatic powder spraying system further comprises a dust concentration detector arranged in the powder spraying chamber, the dust concentration detector is connected with a production line PLC of the coating powder spraying line, and the production line PLC is configured to control the spraying device to stop spraying powder or reduce the powder spraying amount when the dust concentration detector detects that the dust concentration in the powder spraying chamber is greater than a preset value.
Preferably, the spraying coating is a two-dimensional reciprocating automatic spraying machine.
Preferably, the curing device comprises a curing oven, an activated carbon adsorption box and a combustion furnace, the workpiece conveying device penetrates through the curing oven, an inlet of the activated carbon adsorption box is connected to a waste gas outlet of the curing oven, an inlet of the combustion furnace is connected to an outlet of the activated carbon adsorption box, a catalytic reduction device is arranged in the activated carbon adsorption box, and the catalytic reduction device is used for detecting the concentration of organic gas at the outlet of the activated carbon adsorption box and desorbing the activated carbon in the activated carbon adsorption box when the concentration of the organic gas at the outlet of the activated carbon adsorption box exceeds a preset value.
Preferably, the waste gas outlet of the curing furnace is connected with the inlet of the activated carbon adsorption box through a cooling device.
Preferably, still include material vision identification system, material vision identification system includes sensor module, vision intelligent recognition module, control system, database system and beats the sign indicating number rifle, sensor module and it passes through respectively to beat the sign indicating number rifle control system with vision intelligent recognition module connects, vision intelligent recognition module with database system connects, sensor module is used for being in along work piece moving direction work piece in the identification area of the upper reaches of next work station detects and discerns categorised.
Preferably, the sensor module includes:
high resolution cameras and/or lidar;
a visual switch connected with the high resolution camera and/or the lidar, the visual switch connected with the control system.
Preferably, the visual intelligent recognition module is an industrial personal computer with a GPU.
Preferably, the material visual identification system further comprises a display, the display is connected with the control system, and the display is used for displaying the workpiece material name and the production date acquired by the material visual identification system and correspondingly generated two-dimensional code information.
Preferably, the workpiece conveying device is a suspended power and free chain conveying device.
According to the technical scheme, the invention discloses a coating powder spraying line which comprises a pretreatment system, an electrostatic powder spraying system, a curing device and a workpiece conveying device, wherein the pretreatment system is used for degreasing, cleaning and silanizing workpieces; the electrostatic powder spraying system comprises a powder spraying chamber, a powder supply center, a separating device, an air draft filtering device and a spraying device, wherein the air draft filtering device is communicated with the separating device through a pipeline; the curing device is used for curing the powder coating on the workpiece; the workpiece conveying device is provided with an upper workpiece station and a lower workpiece station, and the upper workpiece station, the pretreatment system, the electrostatic powder spraying system, the curing device and the lower workpiece station are sequentially connected in series by the workpiece conveying device to form a closed workpiece circulation loop; when the powder spraying line is applied, the workpiece conveying device circularly reciprocates among the workpiece loading station, the pretreatment system, the electrostatic powder spraying system, the curing device and the workpiece unloading station, a worker loads a workpiece to the workpiece conveying device at the workpiece loading station, the workpiece conveying device conveys the workpiece to the pretreatment system for degreasing, cleaning, silanization and other treatments, after pretreatment, the workpiece is moved to the electrostatic powder spraying system for powder spraying and enters the curing device for curing after spraying, finally the workpiece conveying device conveys the workpiece to the workpiece unloading station for being taken down by the worker, and the workpiece to be sprayed is reloaded at the workpiece loading station, therefore, the workpiece conveying device for coating the powder spraying line connects all parts of the powder spraying line in series to form a closed circulation loop, all the procedures such as pretreatment, powder spraying, curing and the like can be sequentially completed by one-time loading, and the problem of disjointing does not exist among all the procedures, the labor intensity can be effectively reduced, and the powder spraying process efficiency can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a plan view of a coating dusting line provided by an embodiment of the present invention;
fig. 2 is a schematic view of an automatic detection and dosing system for a coating powder spraying line according to an embodiment of the present invention;
fig. 3 is a top view of an electrostatic powder spray system for coating a powder spray line according to an embodiment of the present invention.
Wherein:
1 is a pre-degreasing device; 101 is a pre-degreasing tank; 2 is a degreasing device; 201 is a degreasing tank; 3 is a first water washing device; 4 is a pickling device; 5 is a second water washing device; 6 is a first pure water washing device; 7 is a silanization device; 701 is a silane tank; 8 is a second pure water washing device; 9 is a third pure water washing device; 10 is a water blowing device; 11 is a drying device; 12 is a drying forced cooling device; 13 is a shielding/checking/grinding station; 14a is a bottom layer powder spraying device; 14b is a surface powder spraying device; 141 is a spray room; 142 is a separation device; 143 is an air draft filtering device; 144 is a pipeline; 145 is a powder supply center; 146 is a three-way pipeline; 147 is a spraying device; 148 is a hand spraying station; 15 is a curing oven; 16 is a solidification forced cooling device; 17 is a workpiece unloading station 17; 18 is a workpiece loading station; 19 is a workpiece conveying device; 20 is a first sampling device; 21 is a second sampling device; 22 is a third sampling device; 23 is free alkali and total alkali analyzer; 24 is a silane pH value analyzer; 25 is a silane point analyzer; 26 is a degreasing agent storage tank; 27 is a pre-degreasing supply pump; 28 is a degreasing supply pump; 29 is an acid-base regulator storage tank; 30 is a regulator supply pump; 31 is a silane agent storage tank; 32 is a silane agent supply pump; 33 is a central control system; and 34 is a feedback module.
Detailed Description
The core of the invention is to provide a coating powder spraying line, so as to achieve the purposes of solving the problem of disjointed pretreatment process and powder spraying process, reducing labor intensity and improving powder spraying process efficiency.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Referring to fig. 1 to 3, fig. 1 is a top view of a coating and powder spraying line according to an embodiment of the present invention, fig. 2 is a schematic diagram of an automatic detection and dosing system for the coating and powder spraying line according to an embodiment of the present invention, and fig. 3 is a top view of an electrostatic powder spraying system for the coating and powder spraying line according to an embodiment of the present invention.
The embodiment of the invention discloses a coating and powder spraying line which comprises a pretreatment system, an electrostatic powder spraying system, a curing device and a workpiece conveying device 19.
The pretreatment system is used for degreasing, cleaning and silanizing the workpiece; the electrostatic powder spraying system comprises a powder spraying chamber, a powder supply center 145, a separating device 142, an air draft filtering device 143 and a spraying device 147, wherein the air draft filtering device 143 is communicated with the separating device 142 through a pipeline 144, the separating device 142 is respectively communicated with the powder spraying chamber and the powder supply center 145 through a three-way pipeline 146, and the spraying device 147 is arranged in the powder spraying chamber; the curing device is used for curing the powder coating on the workpiece; the workpiece conveying device 19 is provided with an upper workpiece station 18 and a lower workpiece station 17, and the workpiece conveying device 19 sequentially connects the upper workpiece station 18, the pretreatment system, the electrostatic powder spraying system, the curing device and the lower workpiece station 17 in series to form a closed workpiece circulation loop.
In summary, compared with the prior art, when the coating and powder spraying line provided by the embodiment of the invention is applied, the workpiece conveying device 19 is cyclically reciprocated among the workpiece loading station 18, the preprocessing system, the electrostatic powder spraying system, the curing device and the workpiece unloading station 17, a worker loads a workpiece to the workpiece conveying device 19 at the workpiece loading station 18, the workpiece conveying device 19 conveys the workpiece to the preprocessing system for degreasing, cleaning and silanization, and the like, after preprocessing, the workpiece is moved to the electrostatic powder spraying system for powder spraying, after spraying, the workpiece enters the curing device for curing, and finally the workpiece conveying device 19 conveys the workpiece to the workpiece unloading station 17 to be taken down by the worker, and the workpiece to be sprayed is reloaded at the workpiece loading station 18, so that the workpiece conveying device 19 of the coating and powder spraying line connects parts in series to form a closed circulation loop, all procedures such as pretreatment, powder spraying, solidification and the like can be completed in sequence by one-time loading, the problem of disjointing does not exist among all procedures, the labor intensity can be effectively reduced, and the powder spraying process efficiency is improved.
Preferably, as shown in fig. 1, in the embodiment of the present invention, the pretreatment system includes a pre-degreasing device 1, a degreasing device 2, a first cleaning device, a silylation device 7, a second cleaning device, and a drying device 11, which are sequentially arranged in the moving direction of the workpiece.
Specifically, the first cleaning device includes a first water washing device 3, a pickling device 4, a second water washing device 5, and a first pure water washing device 6, which are sequentially arranged along the moving direction of the workpiece, the second cleaning device includes a second pure water washing device 8, a third pure water washing device 9, and a water blowing device 10, which are sequentially arranged along the moving direction of the workpiece, the first water washing device 3 and the second water washing device 5 adopt tap water to clean the workpiece, and the first pure water washing device 6, the second pure water washing device 8, and the third pure water washing device 9 adopt pure water to clean the workpiece.
Specifically, the pretreatment process comprises the following steps of a: degreasing the workpiece at 40-50 deg.C by spraying degreasing solution onto the workpiece for 5-8min to remove oil on the surface of the workpiece; b. washing with water: spraying tap water for cleaning for 1min to remove residual impurities on the surface; c. neutral acid washing: adding neutral pickling process to the rusted workpiece, and pickling the workpiece at 40-50 deg.C by spraying pickling solution onto the workpiece for 3-5min to remove the rusted material on the surface of the workpiece; d. washing with water: spraying tap water for cleaning for 1min to remove residual acid solution on the surface; e. fresh pure water washing: directly spraying fresh pure water, and completely removing impurities or residual liquid remained on the surface for through type cleaning; f. silanization: spraying silane liquid to the workpiece at room temperature for 2-3 min; g. direct flushing with pure water: adopting direct injection of fresh pure water, removing redundant residual liquid on the surface for through type cleaning, wherein the step can be carried out once or for many times according to requirements; h. draining and automatically blowing: sweeping moisture on the surface of the workpiece through an adjustable air nozzle by using a high-pressure fan for 5 min; i. and (3) drying and dehydrating, namely, drying the surface moisture of the workpiece in drying equipment by hot air circulation at the temperature of 90-120 ℃ for 8-12 min.
Preferably, the coating powder spraying line further comprises an automatic detection and dosing system, the automatic detection and dosing system comprises a first sampling device 20, a second sampling device 21, a third sampling device 22, a free alkali and total alkali analyzer 23, a silane pH value analyzer 24, the system comprises a silane point analyzer 25, a degreasing agent supply device, an acid-base regulator supply device, a silane agent supply device and a central control system 33, wherein a first sampling device 20 is used for sampling from a pre-degreasing tank 101 of a pre-degreasing device 1, a second sampling device 21 is used for sampling from a degreasing tank 201 of a degreasing device 2, a third sampling device 22 is used for sampling from a silane tank 701 of a silanization device 7, sampling ports of a free alkali analyzer 23 and a total alkali analyzer 23 are respectively communicated with an output port of the first sampling device 20 and an output port of the second sampling device 21, and a sampling port of a silane pH value analyzer 24 and a sampling port of the silane point analyzer 25 are respectively communicated with an output port of the third sampling device 22; the signal output ends of the free alkali and total alkali analyzer 23, the silane pH value analyzer 24 and the silane point analyzer 25 are respectively connected with the signal input end of the central control system 33, and the signal output end of the central control system 33 is respectively connected with the degreasing agent supply device, the acid-base regulator supply device and the silane agent supply device.
As shown in fig. 2, the degreasing agent supply device includes a degreasing agent storage tank 26, a pre-degreasing supply pump 27, and a degreasing supply pump 28, the pre-degreasing supply pump 27 communicates the degreasing agent storage tank 26 with the pre-degreasing tank 101, the degreasing supply pump 28 communicates the degreasing agent storage tank 26 with the degreasing tank 201, the acid-base adjusting agent supply device includes an acid-base adjusting agent storage tank 29 and an adjusting agent supply pump 30 that communicates the acid-base adjusting agent storage tank 29 with the silane tank 701, and the silane agent supply device includes a silane agent storage tank 31 and a silane agent supply pump 32 that communicates the silane agent storage tank 31 with the silane tank 701.
Furthermore, liquid level detection devices connected with the signal input end of the central control system 33 are respectively arranged in the storage tanks of the degreasing agent supply device, the acid-base regulator supply device and the silane agent supply device, and the central control system 33 sends alarm information when the liquid level detection devices detect that the liquid level is lower than a preset value.
Preferably, the automatic detection and dosing system further includes a feedback module 34 connected to the central control system 33, the feedback module 34 is configured to feed back sampling information, analysis information, material supply information, and alarm information in real time, and in the embodiment of the present invention, the feedback module 34 is a display.
As shown in fig. 1, in the embodiment of the present invention, the electrostatic powder spraying system includes a bottom layer powder spraying device 14a and a surface layer powder spraying device 14b sequentially arranged along the moving direction of the workpiece, the bottom layer powder spraying device 14a and the surface layer powder spraying device 14b are respectively provided with a spraying room 141, a manual spraying station 148, a powder supply center 145, a separating device 142, an air draft filtering device 143, and a spraying device 147, the spraying room 141 and the two manual spraying stations 148 at two ends jointly form the powder spraying chamber, the two powder spraying chambers are separately isolated to prevent powder mixing, corners of each powder spraying chamber are rounded structures to reduce powder accumulation, inner walls of the powder spraying chambers are made of a streamline design and non-conductive materials, the powder spraying and applying rate is improved, and the powder spraying chambers are slightly negative-pressurized and are not allowed to have the problem of powder overflow; the air speed of the opening surface is more than or equal to 0.6m/s, no turbulent air flow exists in the powder spraying chamber, the stable air flow is from top to bottom, the two sides are uniformly distributed, the good spraying effect is ensured, the powder supply center 145, the separating device 142 and the air draft filtering device 143 form a powder recovery system, the powder can be prevented from overflowing during spraying production and color changing, and the recovered powder is directly sent into a powder supply box of the powder supply center 145; the powder supply center 145 is made of a flame-retardant or non-combustible material, does not cause powder overflow or accumulation, and is easy to clean.
Further optimize above-mentioned technical scheme, the coating line that dusts still includes production line PLC, and production line PLC is connected with pretreatment system, electrostatic powder spraying system, solidification equipment and work piece conveyor 19 respectively.
Further, the electrostatic powder spraying system further comprises a dust concentration detector arranged in the powder spraying chamber, the dust concentration detector is connected with a production line PLC of the coating powder spraying line, the production line PLC is used for controlling the spraying device 147 to stop spraying powder or reduce the powder spraying amount when the dust concentration detector detects that the dust concentration in the powder spraying chamber is greater than a preset value, the dust concentration detector detects the dust concentration in the powder spraying chamber in real time during work, and the concentration of the powder is kept to be less than or equal to 15mg/m3And the dust explosion is prevented.
Further optimizing the technical scheme, the spraying device 147 is a two-dimensional reciprocating automatic spraying machine, the linkage with the workpiece is realized through grating detection, the two-dimensional reciprocating automatic spraying machine can perform profiling linkage according to the size, the shape and the position of the workpiece, the height of a spray gun of the two-dimensional reciprocating automatic spraying machine and the distance between the spray gun and the workpiece are automatically adjusted, and the powder feeding rate is improved.
Preferably, in the embodiment of the present invention, the curing device includes a curing oven 15, an activated carbon adsorption tank and a combustion furnace, the workpiece conveying device 19 passes through the curing oven 15, an inlet of the activated carbon adsorption tank is connected to a waste gas outlet of the curing oven 15, an inlet of the combustion furnace is connected to an outlet of the activated carbon adsorption tank, a catalytic reduction device is disposed in the activated carbon adsorption tank, the catalytic reduction device is configured to detect an organic gas concentration at the outlet of the activated carbon adsorption tank and desorb the activated carbon in the activated carbon adsorption tank when the organic gas concentration at the outlet of the activated carbon adsorption tank exceeds a preset value, and the desorbed organic gas enters the combustion furnace for high temperature decomposition.
Further, the exhaust gas outlet of the curing oven 15 is connected to the inlet of the activated carbon adsorption tank through a cooling device, and the cooling device is used for making the temperature of the exhaust gas entering the activated carbon adsorption tank not higher than 55 ℃.
Preferably, the electrostatic powder spraying system further comprises a material visual identification system, the material visual identification system comprises a sensor module, a visual intelligent identification module, a control system, a database system and a code printing gun, the sensor module and the code printing gun are respectively connected with the visual intelligent identification module through the control system, the visual intelligent identification module is connected with the database system, and the sensor module is used for detecting, identifying and classifying workpieces located in an identification area at the upstream of the workpiece discharging station 17 along the moving direction of the workpieces.
Further, the sensor module includes:
the high-resolution camera and/or the laser radar can be only used, or only the laser radar can be used, or a combination mode of the high-resolution camera and the laser radar can be used; and the visual switch is connected with the high-resolution camera and/or the laser radar and the control system.
Preferably, the visual intelligent recognition module is an industrial personal computer with a GPU.
In an embodiment of the present invention, the material visual identification system further includes a display, the display is connected to the control system, and the display is configured to display the name of the workpiece material, the production date, and the correspondingly generated two-dimensional code information, which are obtained by the material visual identification system.
In the embodiment of the present invention, the workpiece conveying device 19 is a suspended stacking chain conveying device, and the pretreatment system performs the pretreatment process by using a through-type spraying method, but may perform the pretreatment process by using other methods, such as a bath immersion method.
In summary, all the devices and the tank body of the electrostatic powder spraying system provided by the embodiment of the invention are arranged above the ground, and no basic construction design is provided; the suspension type accumulation chain is circularly reciprocated, so that the mixed line production of workpieces of various types, various specifications and small batches is met; through type spraying, the equipment is compact in arrangement and small in occupied space; the system has the functions of all-weather real-time monitoring and on-line titration detection in 24 hours by being provided with an automatic detection and dosing system, a visual intelligent identification module, a control system and a database system, and all parameters can be displayed and retrieved on a terminal touch screen for production control.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (19)

1. A coating and powder spraying working line is characterized by comprising:
the pretreatment system is used for degreasing, cleaning and silanizing the workpiece;
the electrostatic powder spraying system comprises a powder spraying chamber, a powder supply center, a separating device, an air draft filtering device and a spraying device, wherein the air draft filtering device is communicated with the separating device through a pipeline;
the curing device is used for curing the powder coating on the workpiece;
the workpiece conveying device is provided with an upper workpiece station and a lower workpiece station, and the upper workpiece station, the pretreatment system, the electrostatic powder spraying system, the curing device and the lower workpiece station are sequentially connected in series by the workpiece conveying device to form a closed workpiece circulation loop.
2. The coating powder spraying line according to claim 1, wherein the pretreatment system comprises a pre-degreasing device, a first cleaning device, a silylation device, a second cleaning device and a drying device which are arranged in sequence along the moving direction of the workpiece.
3. The coating powder spraying line according to claim 2, wherein the first cleaning device comprises a first water washing device, a pickling device, a second water washing device, and a first pure water washing device, which are arranged in this order in the moving direction of the workpiece.
4. The coating powder spraying line according to claim 2, wherein the second cleaning device comprises a second pure water washing device, a third pure water washing device and a water blowing device which are arranged in this order in the moving direction of the workpiece.
5. The coating powder spraying line according to any one of claims 2 to 4, further comprising an automatic detection and dosing system, wherein the automatic detection and dosing system comprises a first sampling device, a second sampling device, a third sampling device, a free alkali and total alkali analyzer, a silane pH value analyzer, a silane point analyzer, a degreasing agent supply device, an acid-base regulator supply device, a silane agent supply device and a central control system, the first sampling device is used for sampling from a pre-degreasing tank of the pre-degreasing device, the second sampling device is used for sampling from a degreasing tank of the degreasing device, the third sampling device is used for sampling from a silane tank of the silanization device, sampling ports of the free alkali and total alkali analyzer are respectively communicated with an output port of the first sampling device and an output port of the second sampling device, the sampling port of the silane pH value analyzer and the sampling port of the silane point analyzer are respectively communicated with the output port of the third sampling device; the signal output ends of the free alkali and total alkali analyzer, the silane pH value analyzer and the silane point analyzer are respectively connected with the signal input end of the central control system, and the signal output end of the central control system is respectively connected with the degreasing agent supply device, the acid-base regulator supply device and the silane agent supply device.
6. The coating powder spraying line according to claim 5, wherein liquid level detection devices connected with a signal input end of the central control system are respectively arranged in storage tanks of the degreasing agent supply device, the acid-base regulator supply device and the silane agent supply device, and the central control system sends alarm information when the liquid level detection devices detect that the liquid level is lower than a preset value.
7. The coating powder spraying line according to claim 6, wherein the automatic detection and dosing system further comprises a feedback module connected with the central control system, and the feedback module is used for feeding back sampling information, analysis information, material supply information and alarm information in real time.
8. The coating and powder spraying line according to any one of claims 1 to 4 and 6 to 7, wherein the electrostatic powder spraying system comprises a bottom layer powder spraying device and a surface layer powder spraying device which are arranged in sequence along the moving direction of the workpiece, and the bottom layer powder spraying device and the surface layer powder spraying device are respectively matched with the powder supply center, the separating device, the air draft filtering device and the spraying device.
9. The paint spray line of any one of claims 1 to 4 and 6 to 7 wherein the corners of the spray booth are rounded.
10. The paint and powder spray line of any one of claims 1 to 4 and 6 to 7, further comprising a production line PLC connected to the pretreatment system, the electrostatic powder spray system, the curing device, and the workpiece transport device, respectively.
11. The paint powder spraying line according to claim 10, wherein the electrostatic powder spraying system further comprises a dust concentration detector arranged in the powder spraying chamber, the dust concentration detector is connected with a production line PLC of the paint powder spraying line, and the production line PLC is used for controlling the spraying device to stop spraying or reduce the powder spraying amount when the dust concentration detector detects that the dust concentration in the powder spraying chamber is greater than a preset value.
12. The coating dusting line of any of claims 1-4, 6-7 and 11 where the coating is a two-dimensional reciprocating automatic sprayer.
13. The coating powder spraying line according to any one of claims 1 to 4, 6 to 7 and 11, wherein the curing device comprises a curing oven, an activated carbon adsorption tank and a combustion furnace, the workpiece conveying device passes through the curing oven, an inlet of the activated carbon adsorption tank is connected to a waste gas outlet of the curing oven, an inlet of the combustion furnace is connected to an outlet of the activated carbon adsorption tank, and a catalytic reduction device is arranged in the activated carbon adsorption tank and used for detecting the organic gas concentration at the outlet of the activated carbon adsorption tank and desorbing the activated carbon in the activated carbon adsorption tank when the organic gas concentration at the outlet of the activated carbon adsorption tank exceeds a preset value.
14. The coating powder spraying line according to claim 13, wherein the exhaust gas outlet of the curing oven is connected with the inlet of the activated carbon adsorption tank through a cooling device.
15. The coating powder spraying line according to any one of claims 1 to 4, 6 to 7, 11 and 14, further comprising a material visual identification system, wherein the material visual identification system comprises a sensor module, a visual intelligent identification module, a control system, a database system and a coding gun, the sensor module and the coding gun are respectively connected with the visual intelligent identification module through the control system, the visual intelligent identification module is connected with the database system, and the sensor module is used for detecting, identifying and classifying workpieces in an identification area which is located at the upstream of the workpiece discharging station along the workpiece moving direction.
16. The paint dusting line of claim 15, wherein the sensor module comprises:
high resolution cameras and/or lidar;
a visual switch connected with the high resolution camera and/or the lidar, the visual switch connected with the control system.
17. The coating dusting line of claim 15 where the visual intelligent recognition module is an industrial personal computer with a GPU.
18. The paint powder spraying line of claim 15, wherein the material vision recognition system further comprises a display, the display is connected with the control system, and the display is used for displaying the workpiece material name, the production date and the correspondingly generated two-dimensional code information acquired by the material vision recognition system.
19. A paint and powder spray line according to any one of claims 1 to 4, 6 to 7, 11, 14 and 16 to 18 wherein the workpiece conveyor is a suspended power and free chain conveyor.
CN202111440572.8A 2021-11-30 2021-11-30 Coating powder spraying line Pending CN114011635A (en)

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