CN116273777B - Flexible finish paint coating method - Google Patents
Flexible finish paint coating method Download PDFInfo
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- CN116273777B CN116273777B CN202310273679.0A CN202310273679A CN116273777B CN 116273777 B CN116273777 B CN 116273777B CN 202310273679 A CN202310273679 A CN 202310273679A CN 116273777 B CN116273777 B CN 116273777B
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- 239000003973 paint Substances 0.000 title claims abstract description 369
- 238000000576 coating method Methods 0.000 title claims abstract description 60
- 238000005507 spraying Methods 0.000 claims abstract description 183
- 239000007788 liquid Substances 0.000 claims abstract description 113
- 239000000463 material Substances 0.000 claims abstract description 45
- 239000011248 coating agent Substances 0.000 claims abstract description 42
- 230000001502 supplementing effect Effects 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 18
- 238000010422 painting Methods 0.000 claims description 9
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000007592 spray painting technique Methods 0.000 claims description 4
- 239000002966 varnish Substances 0.000 description 11
- 239000003086 colorant Substances 0.000 description 8
- 239000012855 volatile organic compound Substances 0.000 description 8
- 230000000295 complement effect Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000001054 red pigment Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000009500 colour coating Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000005002 finish coating Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- B05D5/061—Special surface effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/081—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to the weight of a reservoir or container for liquid or other fluent material; responsive to level or volume of liquid or other fluent material in a reservoir or container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
- B05B12/1472—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet separate supply lines supplying different materials to separate outlets of the spraying apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
- B05B12/149—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet characterised by colour change manifolds or valves therefor
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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
- 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
- B05D5/067—Metallic effect
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a flexible finish paint coating method, which is based on a coating device, wherein the coating device comprises a plurality of paint conveying systems and a plurality of paint spraying structures corresponding to the paint conveying systems, each paint conveying system comprises a circulating tank for conveying paint to the corresponding paint spraying structure and a replenishing tank for storing and conveying the paint to the circulating tank, the paint spraying structures are used for corresponding to the paint spraying stations, and the flexible finish paint coating method comprises the following steps: according to the color characteristics of different coating structures, coating is conveyed to a plurality of circulating tanks, and the material conveying of the material supplementing tank into the circulating tanks is controlled so that the liquid level height of the coating in the circulating tanks meets the set liquid level range; when a vehicle body to be sprayed sequentially passes through a plurality of paint spraying stations, a plurality of circulating tanks are controlled to sequentially feed materials to corresponding paint spraying structures; and controlling the plurality of paint spraying structures to paint the vehicle body to be sprayed in sequence to obtain the sprayed vehicle body. The invention aims to solve the problems of high cost and high VOC emission of a single coating caused by large scrapped amount of the coating in the existing vehicle body coating.
Description
Technical Field
The invention relates to the technical field of vehicle body coating, in particular to a flexible finish coating method.
Background
In the automotive industry, more and more vehicle purchasing customers wish to be able to distinguish their own vehicle from other customers. Proprietary appearance modeling is an important means to meet this attractive demand, and thus proprietary colors that are specifically tailored to customer needs emerge. Because the custom color is mostly one-time order, the residual paint (system circulation amount + surplus) can only be scrapped after the spraying is finished. If the centralized paint supply system is used for the paint mixing room, the circulation amount of the single system is more than 320Kg, namely, at least 320Kg of paint is scrapped after the spraying is finished; if the color of the paint is customized, namely the paint has two types of coatings, more than 640kg of paint needs to be scrapped if 2 systems are required for conveying the paint. The scrapped amount of the paint is large, so that the cost of a single paint is high and the emission of VOC (volatile organic compounds) is high.
Disclosure of Invention
The invention mainly aims to provide a flexible finish paint coating method, which aims to solve the problems of high cost and high VOC emission of a single paint caused by large scrapped paint in the existing vehicle body coating.
In order to achieve the above object, the present invention provides a flexible top coating method, based on a coating apparatus, the coating apparatus including a plurality of paint delivery systems and a plurality of paint spraying structures corresponding to the plurality of paint delivery systems, each of the paint delivery systems including a circulation tank for delivering paint to the corresponding paint spraying structure and a replenishing tank for storing and delivering paint to the circulation tank, the plurality of paint spraying structures being used to correspond to a plurality of paint spraying stations, the flexible top coating method comprising the steps of:
controlling the material supplementing tank to convey material into the circulating tank so that the liquid level height of the coating in the circulating tank meets a set liquid level range;
when a vehicle body to be sprayed sequentially passes through a plurality of paint spraying stations, a plurality of circulating tanks are controlled to sequentially feed the corresponding paint spraying structures;
and controlling the plurality of paint spraying structures to paint the vehicle body to be sprayed in sequence to obtain the sprayed vehicle body.
Optionally, each paint delivery system further comprises a detector arranged in the circulation tank and a controller electrically connected with the detector;
the step of controlling the material feeding tank to feed material into the circulating tank so that the liquid level of the paint in the circulating tank meets a set liquid level range comprises the following steps:
acquiring an actual liquid level value of the coating in each circulating tank;
and controlling each material supplementing tank to execute a material supplementing strategy according to each actual liquid level value so that the liquid level height of the paint in the circulating tank meets a set liquid level range.
Optionally, the set liquid level range includes a first liquid level critical value and a second liquid level critical value, and the second liquid level critical value is greater than the first liquid level critical value;
the step of controlling each of the replenishing tanks to execute a replenishing strategy according to each of the actual liquid level values so that the liquid level height of the paint in the circulating tank meets a set liquid level range comprises the following steps:
when the actual liquid level value is smaller than the first liquid level critical value, controlling the material supplementing tank to convey paint to the circulating tank;
and when the actual liquid level value is greater than the second liquid level critical value, controlling the material supplementing tank to stop operating.
Optionally, the coating device further comprises an alarm device, and the alarm device is electrically connected with the controller;
the step of controlling each of the feed tanks to execute a feed strategy according to each of the actual liquid level values further includes:
when the actual liquid level value is lower than the first alarm liquid level value or higher than the second alarm liquid level value, controlling the alarm device to give an alarm and controlling the material supplementing tank to stop operating;
the first alarm liquid level value is smaller than the first liquid level critical value, and the second alarm liquid level value is larger than the second liquid level critical value.
Optionally, before the step of controlling the material feeding of the material feeding tank into the circulating tank so that the liquid level of the paint in the circulating tank meets the set liquid level range, the method comprises the following steps:
and confirming the color and the type of the paint and the corresponding relation between the paint and the spraying station of the replenishing tank where the paint is located according to preset spraying information.
Optionally, each paint delivery system includes a supply pipe and a return pipe, both ends of which are respectively connected with the paint spraying structure and the circulation tank, the supply pipe is used for supplying paint of the circulation tank to the paint spraying structure, the return pipe is used for supplying paint of the corresponding paint spraying structure to flow back into the circulation tank, and a circulation loop is formed among the supply pipe, the return pipe, the circulation tank and the paint spraying structure;
when a vehicle body passes through a plurality of paint spraying stations in sequence, the steps of controlling a plurality of circulating tanks to sequentially feed materials to the corresponding paint spraying stations comprise the following steps:
when one end of the return pipe is separated from the circulating tank and the other end of the return pipe is connected with the paint spraying structure, each circulating tank is controlled to feed the paint to the corresponding paint spraying structure until the paint flows out from one end of the return pipe after passing through the supply pipe and the paint spraying structure.
Optionally, the actual time of the paint flowing out of the return pipe measured by using a No. 4 Ford cup is a, and the set time of the paint flowing out measured by using a No. 4 Ford cup is b, wherein b-a <2s; or,
the actual rotational viscosity of the paint flowing out of the return pipe is c measured by a B-type rotational viscometer, and the set rotational viscosity of the paint is d and d-c is less than 100 mPa.s measured by the B-type rotational viscometer.
Optionally, each of the paint spraying structures comprises a plurality of spraying ports, and the flow rate of the paint passing through each of the spraying ports is v,495ml/min < v <505ml/min.
Optionally, the volume of each circulating tank is V, and V is more than or equal to 15 and less than or equal to 20L.
Optionally, each of the replenishing tanks includes a paint packaging barrel.
In the technical scheme of the invention, the coating device comprises a plurality of paint conveying systems and a plurality of paint spraying structures corresponding to the paint conveying systems, wherein each paint conveying system comprises a circulating tank for conveying paint to the corresponding paint spraying structure and a replenishing tank for storing and conveying the paint to the circulating tank, and the paint spraying structures are used for corresponding to a plurality of paint spraying stations; in each paint conveying system, the paint is conveyed from a circulating tank to a paint spraying structure, and then flows back from the paint spraying structure to the circulating tank, and the paint in the material supplementing tank is conveyed to the circulating tank, so that the liquid level of the paint in the circulating tank meets the set liquid level range, and in the circulating process, the paint performs paint spraying operation on a vehicle body through the paint spraying structure; the flexible finish paint coating method comprises the following steps: the material is conveyed into the circulating tanks by controlling the material supplementing tanks so that the liquid level height of the coating in each circulating tank meets a set liquid level range; when a vehicle body to be sprayed sequentially passes through a plurality of paint spraying stations, a plurality of circulating tanks are controlled to sequentially feed the corresponding paint spraying structures; and controlling the plurality of paint spraying structures to paint the vehicle body to be sprayed in sequence to obtain the sprayed vehicle body. Therefore, the material is fed towards the circulating tank through the feeding tank, so that sufficient circulating paint is ensured in the circulating pipe, the minimum circulating amount of paint conveying is reduced, and stable spraying is ensured; in this way, custom color paint circulation reduction, cost and VOC reduction can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of an embodiment of a coating device provided by the present invention;
FIG. 2 is a schematic view of a painting apparatus and a painting station according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of an embodiment of the method for applying a flexible topcoat according to the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Coating device | 13 | Supply pipe |
| 1 | Paint delivery system | 14 | Reflux pipe |
| 11 | Circulation tank | 2 | Paint spraying structure |
| 12 | Replenishing tank |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
In the automotive industry, more and more vehicle purchasing customers wish to be able to distinguish their own vehicle from other customers. Proprietary appearance modeling is an important means to meet this attractive demand, and thus proprietary colors that are specifically tailored to customer needs emerge. Because the custom color is mostly one-time order, the residual paint (system circulation amount + surplus) can only be scrapped after the spraying is finished. If the centralized paint supply system is used for the paint mixing room, the circulation amount of the single system is more than 320Kg, namely, at least 320Kg of paint is scrapped after the spraying is finished; if the color of the paint is customized, namely the paint has two types of coatings, more than 640kg of paint needs to be scrapped if 2 systems are required for conveying the paint. The scrapped amount of the paint is large, so that the cost of a single paint is high and the VOC emission is high.
In view of the above, the present invention provides a method for coating a flexible top-coat paint, which can reduce the paint circulation amount of a paint delivery system in a coating apparatus, reduce the cost and VOC, and fig. 1 is a schematic perspective view of an embodiment of the coating apparatus provided by the present invention; FIG. 2 is a schematic view of a painting apparatus and a painting station according to an embodiment of the present invention; fig. 3 is a schematic flow chart of an embodiment of the method for applying a flexible topcoat according to the present invention.
Referring to fig. 1 and 2, the coating apparatus 100 includes a plurality of paint delivery systems 1 and a plurality of paint spraying structures 2 corresponding to the paint delivery systems 1, each paint delivery system 1 includes a circulation tank 11 for delivering paint to the corresponding paint spraying structure 2, and a replenishing tank 12 for storing and delivering paint to the circulation tank 11, and the plurality of paint spraying structures 2 are used for corresponding to a plurality of paint spraying stations; in this embodiment, the plurality of paint spraying stations includes a paint internal spraying station, a paint first external spraying station, a paint second external spraying station, and a paint complementary spraying station; the paint spraying systems and the paint spraying structures 2 corresponding to the paint conveying systems 1 are respectively arranged in a one-to-one correspondence to the paint spraying stations, and the paint spraying structures 2 are not limited as long as the paint spraying operation can be performed on the vehicle body. The vehicle body sequentially passes through the color paint internal spraying station, the color paint first external spraying station, the color paint second external spraying station and the color paint complementary spraying station to finish color spraying; and at each color paint station, the paint is conveyed from the circulation tank 11 to the paint spraying structure 2, and then flows back into the circulation tank 11 from the paint spraying structure 2, and the paint in the replenishing tank 12 is conveyed to the circulation tank 11, so that the liquid level of the paint in the circulation tank 11 meets the set liquid level range. Depending on the custom color coating configuration, multiple of the recycle tanks 11 may be charged with the same or different coating materials to achieve custom color spraying, nor do all of the recycle tanks 11 have to be charged with coating materials (a single coating color may not be charged to all system charging systems). The paint input by the material supplementing tank 12 is the same as that input by the corresponding communicated circulating tank 11, so that the liquid level of the paint in the circulating tank 11 meets the set liquid level range, the amount of the paint in a single cycle is small, the cost is low, and the VOC emission is reduced.
In this embodiment, each paint delivery system 1 includes a supply pipe 13 and a return pipe 14, two ends of which are respectively connected to the paint spraying structure 2 and the circulation tank 11, where the supply pipe 13 is used for supplying paint from the circulation tank 11 to the paint spraying structure 2, the return pipe 14 is used for returning paint from the corresponding paint spraying structure 2 to the circulation tank 11, and a circulation loop is formed among the supply pipe 13, the return pipe 14, the circulation tank 11 and the paint spraying structure 2; each paint spraying structure 2 further comprises a paint spraying pipe and a plurality of paint spraying openings arranged on the paint spraying pipe, two ends of each paint spraying pipe are respectively communicated with the supply pipe 13 and the return pipe 14, and paint can be sprayed to a vehicle body from the plurality of paint spraying openings; corresponding to a plurality of paint spraying stations: the number of the spraying openings of the spraying structure 2 corresponding to the inner spraying stations of the colored paint is six, seven or eight, the number of the spraying openings of the spraying structure 2 corresponding to the first outer spraying stations of the colored paint is four, five or six, the number of the spraying openings of the spraying structure 2 corresponding to the second outer spraying stations of the colored paint is four, five or six, the number of the spraying openings of the spraying structure 2 corresponding to the complementary spraying stations of the colored paint is two, and it is required to be noted that each spraying structure 2 comprises a plurality of spray guns corresponding to a plurality of spraying openings, and one spraying opening is arranged on each spray gun.
In this embodiment, each paint delivery system 1 further includes a detector disposed in the circulation tank 11, and a controller electrically connected to the detector; the detector is used for detecting the liquid level of the paint in the circulation tank 11, the coating device 100 further comprises an alarm device, the alarm device is electrically connected with the controller, and the alarm device is used for alarming when the liquid level of the paint in the circulation tank 11 is abnormal.
Each paint delivery system 1 further comprises a paint delivery pump for delivering paint from the circulation tank towards the painting structure; in this embodiment, the paint delivery pumps are all pneumatic pumps, the air source pressure ranges from 6 bar to 8bar, the ratio of the output paint pressure to the input compressed air pressure of the pneumatic pumps, which are correspondingly arranged at the inner spray station of the colored paint, the first outer spray station of the colored paint and the second outer spray station of the colored paint, ranges from 3:1 to 4:1, the ratio of the output paint pressure to the input compressed air pressure of the pneumatic pumps, which are correspondingly arranged at the complementary spray station of the colored paint, ranges from 2:1, and the flow rate of paint passing through each spray port is v,495ml/min < v <505ml/min. Spraying works best when v=500 ml/min.
In addition, each paint delivery system 1 further comprises a feed pump arranged in the feed tank 12 for delivering paint in the feed tank 12 into the circulation tank 11.
In this embodiment, the volume of each circulation tank 11 is V, 15.ltoreq.V.ltoreq.20L. In this way, the volume of the recycle tank 11 is reduced by increasing the feed tank 12, so as to reduce the minimum circulation amount of the paint in the paint delivery system 1, thereby reducing the scrapped amount of the paint and the coating cost. It should be noted that, each material supplementing tank includes a paint packaging barrel, that is, the paint packaging barrel can be directly adopted, and the paint packaging barrel is communicated with the circulating tank 11 through a pipeline, so that the cost is saved, and the setting is simple and convenient.
Based on the above structure, referring to fig. 3, the invention further provides a flexible finish paint coating method, which comprises the following steps:
s10, controlling the material supplementing tank 12 to convey materials into the circulating tank 11 so that the liquid level height of the paint in the circulating tank 11 meets a set liquid level range;
s20, when a vehicle body to be sprayed sequentially passes through a plurality of paint spraying stations, a plurality of circulating tanks 11 are controlled to sequentially feed materials to the corresponding paint spraying structures 2;
s30, controlling the plurality of paint spraying structures 2 to sequentially spray paint on the vehicle body to be sprayed, and obtaining the sprayed vehicle body.
In the technical solution of the present invention, the coating device 100 includes a plurality of paint delivery systems 1 and a plurality of paint spraying structures 2 corresponding to the plurality of paint delivery systems 1, each paint delivery system 1 includes a circulation tank 11 for delivering paint to the corresponding paint spraying structure 2, and a replenishing tank 12 for storing and delivering paint to the circulation tank 11, and the plurality of paint spraying structures 2 are used for corresponding to the plurality of paint spraying stations; in each paint delivery system 1, the paint is conveyed from a circulation tank 11 to a paint spraying structure 2, and then flows back from the paint spraying structure 2 to the circulation tank 11, the paint in a replenishing tank 12 is conveyed to the circulation tank 11, so that the liquid level of the paint in the circulation tank 11 meets a set liquid level range, and in the circulation process, the paint performs paint spraying operation on a vehicle body through the paint spraying structure 2; the flexible finish paint coating method comprises the following steps: feeding materials into the circulating tanks 11 by controlling the material supplementing tanks 12 so that the liquid level height of the paint in each circulating tank 11 meets a set liquid level range; when a vehicle body to be sprayed sequentially passes through a plurality of paint spraying stations, a plurality of circulating tanks 11 are controlled to sequentially feed the corresponding paint spraying structures 2; and controlling a plurality of paint spraying structures 2 to paint the vehicle body to be sprayed in sequence, so as to obtain the sprayed vehicle body. Thereby, the material is fed towards the circulating tank 11 through the feeding tank 12, so that the circulating pipe is ensured to have enough circulating paint, the minimum circulating amount of paint conveying is reduced, and the stable spraying is ensured; in this way, custom color paint circulation reduction, cost and VOC reduction can be achieved.
Specifically, the step S30 includes:
s31, acquiring actual liquid level values of the paint in each circulating tank 11;
the detector is a liquid level detection device for measuring the actual level value of the paint in the circulation tank 11.
And S32, controlling each material supplementing tank 12 to execute a material supplementing strategy according to each actual liquid level value so that the liquid level height of the coating in the circulating tank 11 meets a set liquid level range.
The paint is conveyed towards the circulating tank 11 by controlling the replenishing tank 12, so that the liquid level height of the paint in the circulating tank 11 always meets the set liquid level range, and the spraying quality is improved while the circulating amount is reduced.
More specifically, the set liquid level range includes a first liquid level critical value and a second liquid level critical value, the second liquid level critical value being greater than the first liquid level critical value, and the step S32 includes:
s321, controlling the replenishing tank 12 to convey paint to the circulating tank 11 when the actual liquid level value is smaller than the first liquid level critical value;
s322, when the actual liquid level value is greater than the second liquid level critical value, the operation of the material replenishing tank 12 is controlled to stop.
The first liquid level critical value is 25% of the total liquid level height of the circulation tank 11, and the second liquid level value is 75% of the total liquid level height of the circulation tank 11, so that when the ratio is lower than 25%, the charge pump is controlled to operate, so that the charge tank 12 feeds the circulation tank 11, and when the ratio is higher than 75%, the charge pump is controlled to stop operating.
Further, the step S32 further includes:
s323, when the actual liquid level value is lower than the first alarm liquid level value or higher than the second alarm liquid level value, controlling the alarm device to give an alarm and controlling the material supplementing tank 12 to stop operating;
the first alarm liquid level value is smaller than the first liquid level critical value, and the second alarm liquid level value is larger than the second liquid level critical value.
In this embodiment, the ratio of the first alarm liquid level value to the total liquid level height of the circulation tank 11 is 10%, and the ratio of the second alarm liquid level value to the total liquid level height of the circulation tank 11 is 90%, so that when the actual liquid level value is smaller than the first alarm liquid level value or the actual liquid level is greater than the second alarm liquid level value, the feeding system may be abnormal, thereby controlling the feed pump to stop operating, and avoiding accidents.
In this embodiment, the step S10 includes, before:
step S00, confirming the color and the type of the paint and the corresponding relation between the paint and the spraying station of the material supplementing tank 12 according to preset spraying information.
Specifically, if the paint is plain paint, the paint is only required to be put into the material conveying system corresponding to the internal spraying station of the paint, the first external spraying station of the paint and the supplementary spraying station of the paint; if the paint is metallic paint, the paint needs to be put into all four paint spraying stations; if the coated automobile body is in double BASE colors, the paint in the double BASE colors is divided into colored paint and pearlescent paint, the paint delivery system 1 corresponding to the first outer spray station and the second outer spray station of the colored paint is charged according to the double BASE color process, and the corresponding paint can be charged according to the requirements of the coating and the color characteristics in the material delivery system corresponding to the inner spray station and the complementary spray station of the colored paint, so that the limitation is not excessively imposed.
Specifically, the step S00 includes:
and S01, when one end of the return pipe 14 is separated from the circulation tank 11 and the other end of the return pipe is connected with the paint spraying structure 2, each circulation tank 11 is controlled to feed the paint to the corresponding paint spraying structure 2 until the paint flows out from one end of the return pipe 14 after passing through the supply pipe 13 and the paint spraying structure 2.
In each paint delivery system 1, before the paint spraying operation is performed, a part of paint needs to be discharged outside, so that the paint fills the circulation loop, and the normal operation of the paint spraying operation is ensured; specifically, the charge pump is operated to convey the paint from the charge tank 12 to the circulation tank 11, then the paint flows from the circulation tank 11 into the supply pipe 13, the paint spraying pipe and the return pipe 14 in sequence, and then flows out from one end of the return pipe 14, at this time, the flowing paint is measured, the actual flowing time of the paint flowing out of the return pipe 14 measured by using a No. 4 Ford cup is a, and when the flowing out set time of the paint measured by using a No. 4 Ford cup is b, and b-a <2s, one end of the return pipe 14 can be communicated with the circulation tank 11; alternatively, the actual rotational viscosity of the paint flowing out of the return pipe is c, which is measured by a B-type rotational viscometer, and the set rotational viscosity of the paint is d, which is measured by a B-type rotational viscometer, and d-c <100 mPa.s.
In the present invention, according to a specific color specification of a vehicle body, in a first embodiment, the color of the vehicle body is plain blue, and a specific coating method of the vehicle body includes the steps of:
the color is single-paint plain color paint, and paint is put into the paint conveying system 1 corresponding to the color paint internal spraying station, the color paint first external spraying station and the color paint complementary spraying station; the viscosity of the paint is measured to be 48 seconds by using a Ford cup No. 4, and the paint is discharged until the viscosity of the return pipe 14 reaches more than 46 seconds when the paint is fed into the tank, and then the return pipe 14 is connected into the corresponding circulating tank 11. Pure water is put into the paint conveying system 1 corresponding to the second external spraying station of the colored paint, so that the low-pressure alarm of the circulating tank 11 corresponding to the second external spraying station of the colored paint is avoided.
The color paint number is 17, and the spraying mapping of each station is set. The color of the No. 17 is passed through a line, a middle coating station uses No. 4 white middle coating, the color paint inner spraying station, the color paint first outer spraying station and the color paint second outer spraying station all use No. 17, and a varnish station uses No. 2 varnish.
Setting first-edition spraying parameters, wherein the middle coating is set according to color parameters of other middle coating using No. 4 of the same vehicle type; the outer spraying of the colored paint is carried out according to the ratio of solid components multiplied by the plain white parameter of the same vehicle type, then the flow of a spraying opening of the spray painting structure 2 corresponding to a first outer spraying station of the colored paint is set, and other parameters are set according to the plain white; the flow of all spraying openings of the paint spraying system corresponding to the second station for externally spraying the colored paint is set to be 0; the spraying openings of the spraying structure 2 corresponding to the inner spraying stations of the colored paint are arranged according to the flow of 80% of plain white of the same vehicle type; the varnish is set according to the color parameters of the varnish No. 2 used by other vehicles of the same type.
And the same-vehicle type nail plate experimental vehicle is used for debugging single-layer and chromatic aberration.
After debugging, the operation of the flexible finish paint coating method is carried out, and the sprayed vehicle body is obtained. After polishing and gluing, the spray-coated car body passes through a finishing line, is spray-coated with a middle-coating-color paint and varnish, and is dried.
Finishing the car body, and entering the next working procedure.
In a second embodiment, the color of the vehicle body is charm red, and the specific coating method of the vehicle body comprises the following steps:
the paint is double BASE pearl paint, black middle coating No. 2, varnish No. 2, the first external spraying way is red pearl, and the second external spraying way is red pigment paint; since the inner surface is free of intermediate coating, another similar metallic red spray paint inner spray is used. Because the first external spray red fog is used for generating different colors locally, the second red pigment paint is sprayed at the corresponding position for covering the color paint inspection and repair spraying.
The feeding information is thus: the paint conveying system 1 corresponding to the colored paint internal spraying station is used for throwing metal red paint; the paint delivery system 1 corresponding to the first external spraying station of the colored paint throws the pearly-lustre paint; and the second external spray station of the colored paint and the paint conveying system 1 corresponding to the color paint complementary spray station throw plain red paint.
The color paint number is 17, and the spraying mapping of each station is set. And a No. 17 color line passing station uses No. 2 black middle coating, the color paint internal spraying station, the color paint first external spraying station and the color paint second external spraying station all use No. 17, and a varnish station uses No. 2 varnish.
Setting first-edition spraying parameters, wherein the middle coating is set according to color parameters of other black coating No. 2 of the same vehicle type; the outer spraying of the colored paint is carried out according to the ratio of the metal ash of the same vehicle type to the solid, the flow of the spraying opening corresponding to the first outer spraying station of the colored paint is set, and other rotating speed, forming pressure and voltage parameters are set according to the metal ash; setting the flow of the spraying opening corresponding to the second station for spraying the colored paint after multiplying the solid ratio by the plain white of the same vehicle type, and setting other rotation speed, forming pressure and voltage parameters according to the plain white; the flow of a spraying opening of the inner spraying station of the colored paint is set according to the flow of 90% of metal ash of the same vehicle type; the varnish is set according to the color parameters of other varnish using numbers of the same vehicle type.
And the same-vehicle type nail plate experimental vehicle is used for debugging single-layer and chromatic aberration.
After debugging, the operation of the flexible finish paint coating method is carried out, and the sprayed vehicle body is obtained. After polishing and gluing, the spray-coated car body passes through a finishing line, is spray-coated with a middle-coating-color paint and varnish, and is dried.
Finishing the car body, and entering the next working procedure.
Therefore, the spraying of the customized colors of the vehicle body can be met, the running consumption of the paint conveying system 1 is reduced by setting the paint conveying systems 1 with different rule line edges for different spraying stations, the required paint quantity for running each paint conveying system 1 is within 30Kg, and the scrapping quantity of the paint with the customized colors is reduced to realize the spraying of the customized colors of the single-color paint and the multicolor paint.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (8)
1. A flexible finish painting method, based on a painting device, the painting device comprises a plurality of paint conveying systems and a plurality of paint spraying structures corresponding to the paint conveying systems, each paint conveying system comprises a circulating tank for conveying paint to the corresponding paint spraying structure and a replenishing tank for storing and conveying the paint to the circulating tank, and the paint conveying structures are used for corresponding to a plurality of paint spraying stations, and the flexible finish painting method is characterized in that each paint conveying system comprises a supply pipe and a return pipe, wherein two ends of the supply pipe are respectively connected with the paint spraying structure and the circulating tank, the paint supplying pipe is used for conveying the paint of the circulating tank to the paint spraying structure, the return pipe is used for returning the paint of the corresponding paint spraying structure to the circulating tank, and a circulating loop is formed among the supply pipe, the return pipe, the circulating tank and the paint spraying structure; each paint spraying structure further comprises a paint spraying pipe and a plurality of paint spraying openings arranged on the paint spraying pipe, and two ends of each paint spraying pipe are respectively communicated with the supply pipe and the return pipe;
the flexible finish paint coating method comprises the following steps:
controlling the material supplementing tank to convey material into the circulating tank so that the liquid level height of the coating in the circulating tank meets a set liquid level range;
when a vehicle body to be sprayed sequentially passes through a plurality of paint spraying stations, a plurality of circulating tanks are controlled to sequentially feed the corresponding paint spraying structures;
controlling a plurality of paint spraying structures to sequentially spray paint on the vehicle body to be sprayed to obtain a sprayed vehicle body;
each spray painting structure comprises a plurality of spray painting openings, and the flow rate of the paint passing through each spray painting opening is v,495ml/min < v <505ml/min;
the volume of each circulating tank is V which is more than or equal to 15 and less than or equal to 20L.
2. The flexible topcoat application method according to claim 1 wherein each of said paint delivery systems further comprises a detector disposed within said circulation tank and a controller electrically connected to said detector;
the step of controlling the material feeding tank to feed material into the circulating tank so that the liquid level of the paint in the circulating tank meets a set liquid level range comprises the following steps:
acquiring an actual liquid level value of the coating in each circulating tank;
and controlling each material supplementing tank to execute a material supplementing strategy according to each actual liquid level value so that the liquid level height of the paint in the circulating tank meets a set liquid level range.
3. The flexible topcoat application method according to claim 2, wherein the set liquid level range includes a first liquid level threshold value and a second liquid level threshold value, the second liquid level threshold value being greater than the first liquid level threshold value;
the step of controlling each of the replenishing tanks to execute a replenishing strategy according to each of the actual liquid level values so that the liquid level height of the paint in the circulating tank meets a set liquid level range comprises the following steps:
when the actual liquid level value is smaller than the first liquid level critical value, controlling the material supplementing tank to convey paint to the circulating tank;
and when the actual liquid level value is greater than the second liquid level critical value, controlling the material supplementing tank to stop operating.
4. The flexible topcoat application method of claim 3 wherein the application device further comprises an alarm device, the alarm device being electrically connected to the controller;
the step of controlling each of the feed tanks to execute a feed strategy according to each of the actual liquid level values further includes:
when the actual liquid level value is lower than the first alarm liquid level value or higher than the second alarm liquid level value, controlling the alarm device to give an alarm and controlling the material supplementing tank to stop operating;
the first alarm liquid level value is smaller than the first liquid level critical value, and the second alarm liquid level value is larger than the second liquid level critical value.
5. The flexible topcoat application method according to claim 1, wherein before the step of controlling the replenishment tank to feed into the circulation tank so that the liquid level height of the paint in the circulation tank satisfies a set liquid level range, it comprises:
and confirming the color and the type of the paint and the corresponding relation between the paint and the spraying station of the replenishing tank where the paint is located according to preset spraying information.
6. The method of claim 5, wherein the step of confirming the color and type of the paint and the correspondence between the replenishment tank where the paint is located and the spraying station according to the predetermined spraying information comprises:
when one end of the return pipe is separated from the circulating tank and the other end of the return pipe is connected with the paint spraying structure, each circulating tank is controlled to feed the paint to the corresponding paint spraying structure until the paint flows out from one end of the return pipe after passing through the supply pipe and the paint spraying structure.
7. The flexible topcoat application method according to claim 6, wherein the actual time of outflow of the paint measured with the ford cup No. 4 at the return pipe is a, and the set time of outflow of the paint measured with the ford cup No. 4 is b, b-a <2s; or,
the actual rotational viscosity of the paint flowing out of the return pipe is c measured by a B-type rotational viscometer, and the set rotational viscosity of the paint is d and d-c is less than 100 mPa.s measured by the B-type rotational viscometer.
8. The flexible topcoat application method according to claim 1, wherein each of the replenishment tanks comprises a paint packaging barrel.
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| CN202310273679.0A CN116273777B (en) | 2023-03-20 | 2023-03-20 | Flexible finish paint coating method |
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| CN202310273679.0A CN116273777B (en) | 2023-03-20 | 2023-03-20 | Flexible finish paint coating method |
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| CN116273777B true CN116273777B (en) | 2024-03-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1108478A2 (en) * | 1999-12-14 | 2001-06-20 | Visteon Global Technologies, Inc. | Method and apparatus for painting automobile components |
| CN105457820A (en) * | 2016-01-14 | 2016-04-06 | 东莞丰卓机电设备有限公司 | Intelligent production line with segmental speed change and flexible butt-joint spraying |
| CN207188057U (en) * | 2017-08-01 | 2018-04-06 | 陶洋 | A kind of paint feeding apparatus of vehicle spray painting line |
| CN208275654U (en) * | 2018-04-18 | 2018-12-25 | 营口鑫白云机械有限公司 | Wood preservation coating numerical control spray thrower |
| CN112718336A (en) * | 2021-01-27 | 2021-04-30 | 南京工业职业技术大学 | High-efficient spraying device is used in new energy automobile production based on intelligent control |
-
2023
- 2023-03-20 CN CN202310273679.0A patent/CN116273777B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1108478A2 (en) * | 1999-12-14 | 2001-06-20 | Visteon Global Technologies, Inc. | Method and apparatus for painting automobile components |
| CN105457820A (en) * | 2016-01-14 | 2016-04-06 | 东莞丰卓机电设备有限公司 | Intelligent production line with segmental speed change and flexible butt-joint spraying |
| CN207188057U (en) * | 2017-08-01 | 2018-04-06 | 陶洋 | A kind of paint feeding apparatus of vehicle spray painting line |
| CN208275654U (en) * | 2018-04-18 | 2018-12-25 | 营口鑫白云机械有限公司 | Wood preservation coating numerical control spray thrower |
| CN112718336A (en) * | 2021-01-27 | 2021-04-30 | 南京工业职业技术大学 | High-efficient spraying device is used in new energy automobile production based on intelligent control |
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| CN116273777A (en) | 2023-06-23 |
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