Painting device based on multi-layer composite enameled wire and painting method thereof

Abstract

The invention discloses a painting device based on a multilayer composite enameled wire and a painting method thereof.The painting device comprises a painting frame (1), a plurality of painting roller sets are arranged on the painting frame (1) side by side, each painting roller set comprises a plurality of split painting rollers (2), the painting rollers (2) are coaxially arranged and connected end to end, each painting roller (2) is provided with a painting sleeve (3), and the painting sleeve (3) is sleeved with a plurality of painting rollers (2). The two ends of each painting roller (2) are rotationally connected with the painting frame (1) through installation assemblies, and the outer portion of one painting roller (2) is connected with a driving mechanism. A paint groove (4) is formed outside each painting roller (2), the paint grooves (4) in the same painting roller group are communicated with one another, a felt frame (5) is arranged on one side of each paint groove (4), and a felt (6) is placed on each felt frame (5). According to the invention, the painting effect on the enameled wire can be improved, and the operation of operators is facilitated.

Description

Technical Field

[0001] The invention relates to a painting device, in particular to a painting device based on a multi-layer composite enameled wire and a painting method thereof. Background Art

[0002] Traditional enameled wires are limited by the enameling machine's painting process, so they need to be coated with different paint materials on the surface of the enameled wires in sequence through multiple enameling machines, which greatly increases the processing cost of the enameled wires. In response to this defect, some manufacturers have improved the structure of the enameling machine, that is, by installing multiple sets of painting mechanisms at the front end of the enameling machine, so that each set of painting mechanisms can be used alone to apply a type of insulating paint layer, and the painting mechanisms are staggered left and right to avoid mutual obstruction of the painting mechanisms. Although the painting mechanism can realize the sequential coating of different insulating paint layers by a single enameling machine, since the length of each paint roller and the number of paint slots are fixed, the manufacturer cannot arbitrarily adjust the number and thickness of the paint layers of different paint layers, thereby reducing the painting effect of the enameled wire.

[0003] On the other hand, the conventional installation method of the paint roller is to fix the paint roller directly on the enameled wire rack through a bearing and connect the drive motor through a coupling. As a result, under the limitation of this structure, it is difficult for manufacturers to replace the paint roller based on the paint film structure on the surface of the enameled wire, which increases the difficulty of controlling the paint film thickness on the surface of the enameled wire. Under the above limitations, it is difficult for manufacturers to screen out the best paint film thickness through experiments on the one hand, and it is also difficult to adjust the paint film thickness on the surface of the enameled wire based on the various physical and chemical properties of the enameled wire on the other hand.

[0004] In addition, after the enameled wire is coated with a paint film at the front end of the enameling machine, it needs to pass through the felt before entering the oven, so that the felt can be used to remove excess paint on the surface of the enameled wire. The existing installation method of the felt is to set two long strips of felt strips on the upper and lower sides of the enameled wire, respectively, and the two ends of the felt strips are fixedly connected to the enameling machine frame. The two felt strips are attached to each other and the enameled wire passes through the attached surface between the felt strips, so as to achieve complete wrapping of the surface of the enameled wire.

[0005] However, the defect of this felt structure is that the excess paint and impurities on the surface of the enameled wire will adhere to the felt during the routing process, so that the felt close to the enameled wire will have more stains after long-term use, and will reduce the cleaning effect of the subsequent enameled wire; while the felt surface located at the interval between adjacent enameled wires is relatively clean, but it is difficult for manufacturers to effectively use this part of the felt. Under the above restrictions, when the felt surface close to the enameled wire is attached with excessive stains, the operator can only replace the felt as a whole, thereby reducing the utilization rate of the felt. And because the lower layer of felt is located below the enameled wire and close to the enameled wire, when the operator needs to replace the lower layer of felt, it is necessary to insert the felt into the gap below the enameled wire; and ensure that all parts of the felt are flat. However, due to the obstruction of the enameled wire, it is difficult for the operator to complete the rapid replacement of the felt without touching the enameled wire and the flatness of the felt after installation, which increases the difficulty of the operator's operation.

[0006] Therefore, the existing painting device for multi-layer composite enameled wire has the problems of poor painting effect and difficult operation. Summary of the invention

[0007] The object of the present invention is to provide a painting device and a painting method based on a multi-layer composite enameled wire, which can improve the painting effect of the enameled wire and facilitate the operation of operators.

[0008] The technical solution of the present invention is as follows: a painting device based on a multi-layer composite enameled wire comprises a painting rack, on which a plurality of groups of paint roller groups are arranged side by side, the paint roller groups comprise a plurality of split paint rollers, the paint rollers are coaxially arranged and connected end to end, each paint roller is provided with a paint sleeve, both ends of each paint roller are rotatably connected to the paint rack via an installation assembly, and the outside of one of the paint rollers is connected to a driving mechanism; a paint groove is provided on the outside of each paint roller, the paint grooves in the same paint roller group are interconnected, a felt rack is provided on one side of the paint groove, and felt is placed on the felt rack.

[0009] In the aforementioned painting device based on multi-layer composite enameled wire, the mounting assembly includes a split upper mounting block and a lower mounting block, and the middle part of the upper mounting block and the lower mounting block forms a rotating opening for connecting the paint roller. One end of the upper mounting block and the lower mounting block are hinged to each other, and the other end of the upper mounting block and the lower mounting block are detachably connected, and the two ends of the paint roller are connected to the rotating opening via a copper sleeve.

[0010] In the aforementioned painting device based on multi-layer composite enameled wire, one end of the lower mounting block is rotatably connected to a threaded rod, and the upper mounting block and the lower mounting block are both provided with U-shaped grooves that match the threaded rod. The ends of the threaded rod pass through the U-shaped grooves and are connected to a screw cap, which is used to extrude and limit the lower mounting block and the upper mounting block after tightening.

[0011] In the aforementioned painting device based on the multi-layer composite enameled wire, the painting sleeve is slidably connected to the painting roller, and the two ends of the painting sleeve are fixedly connected to the painting roller via set screws.

[0012] In the aforementioned painting device based on multi-layer composite enameled wire, the felt frame forms a mounting strip on the side close to the paint roller, and a stop block is detachably connected to the mounting strip; the paint sleeve is slidably connected to the paint roller, and the stop blocks are located on both sides of the paint sleeve and are used to laterally limit the paint sleeve.

[0013] In the aforementioned painting device based on multi-layer composite enameled wire, a plurality of slots are spaced apart on the mounting bar, one end of the block is connected to a C-shaped mounting foot, the mounting foot is buckled and connected to the slot and screwed to the mounting bar.

[0014] In the aforementioned painting device based on multi-layer composite enameled wire, the driving mechanism includes a driving motor fixed on the painting frame, and the outside of the driving motor is connected to the painting roller via a gear transmission mechanism.

[0015] In the aforementioned painting device based on multi-layer composite enameled wire, the felt is fixed on the felt frame via a felt mounting frame, and the felt mounting frame includes an upper plate body and a lower plate body which are arranged side by side up and down, and the two ends of the upper plate body and the lower plate body are connected to each other via a column, and a locking screw which is threadedly connected to the upper plate body is provided on the outer side of the column away from one end of the felt frame, and the outer sides of the upper plate body and the lower plate body are both connected to a felt box, and a plurality of felt clips are spaced apart along the length direction on the upper plate body and the lower plate body, and the felt clips of the upper plate body and the lower plate body are staggered left and right.

[0016] In the aforementioned painting device based on multi-layer composite enameled wire, a baffle is provided on one side of the lower plate body. The baffle is multiple and is arranged at intervals along the length direction of the lower plate body. The baffle and the felt clip are staggered with each other.

[0017] In the aforementioned painting device based on the multi-layer composite enameled wire, the felt clip has an L-shaped appearance and is symmetrically arranged on both sides of the upper plate body or the lower plate body.

[0018] In the aforementioned painting device based on the multi-layer composite enameled wire, both ends of the upper plate body and the lower plate body are provided with pressing pieces for clamping the felt.

[0019] In the aforementioned painting device based on the multi-layer composite enameled wire, the upper plate body and the lower plate body on both sides of the felt box are provided with openings for the felt to pass through.

[0020] The painting method based on the aforementioned painting device based on the multi-layer composite enameled wire comprises the following steps:

[0021] ① Adjust the shape and installation position of the paint sleeve on each paint roller according to the thickness and paint type of the paint film on the surface of the enameled wire;

[0022] ② The enameled wire is moved back and forth on the enameling machine, and the enameled wire is passed through the paint sleeves of each paint roller group in turn during the routing process, so that the paint sleeves of each paint roller group can apply different types of insulating paint to the surface of the enameled wire and form insulating paint layers of different thicknesses.

[0023] Compared with the prior art, the present invention has the following characteristics:

[0024] (1) The present invention defines the structure of the painting device, so that the manufacturer can control the number of paint passes on the enameled wire on each paint roller group by replacing the paint sleeves of different paint roller groups, thereby adjusting the thickness of the primer layer, the intermediate layer and the topcoat layer, and effectively reducing the painting cost while improving the painting effect; on this basis, by defining the structure of the paint roller and the installation assembly, on the one hand, the length and weight of each paint roller can be shortened, thereby facilitating the installation and removal of the operator, and on the other hand, the operator can directly unlock and open the upper mounting block to install and remove the paint roller during operation, thereby effectively reducing the difficulty of installing and removing the paint roller; through the structural coordination of the upper mounting block, the lower mounting block and the copper sleeve, the rotation smoothness of the paint roller after installation can be improved, thereby ensuring its painting effect;

[0025] (2) Through the structural cooperation of the mounting strip and the stopper, the paint sleeve can be laterally limited after being positioned, thereby preventing the paint sleeve from lateral movement with the paint roller during use, that is, ensuring the positioning accuracy of the paint sleeve; on the other hand, the installation accuracy of the paint sleeve on the paint roller is also reduced after the paint sleeve is positioned, so that the manufacturer does not need to adjust the lateral position of the paint roller each time it is installed, and a gap is left for the paint roller to be installed and removed smoothly, that is, further facilitating the installation and removal operations of the operators;

[0026] (3) By limiting the structure of the felt mounting frame, the present invention can place the rolled felt in the felt box, and make one end of the felt extend from the felt box and pass through each felt clamp in turn, so that when the felt is attached with excessive stains near the enameled wire area, the operator can move the felt horizontally by extracting it, so that the clean part of the felt can move to contact the enameled wire, that is, improve the utilization rate of the felt; and when the felt needs to be replaced, the operator only needs to extract the scrapped felt to complete the replacement of the new felt. During the replacement process, there is no need to contact the enameled wire and the felt can be ensured to be completely in place after replacement, which is convenient for the operator to replace the felt;

[0027] (4) Through the structural coordination of the column and the locking screw, the upper plate can be limited after being lifted at one end, thereby ensuring that the upper plate can be separated from the enameled wire when the felt is replaced, reducing the obstruction caused by the enameled wire;

[0028] Therefore, the present invention can improve the painting effect on the enameled wire and facilitate the operation of the operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a top view of Example 1;

[0030] Figure 2 It is a schematic diagram of the connection between the paint roller and the mounting assembly;

[0031] Figure 3 It is a schematic diagram of the structure of the felt mounting frame when the felt is replaced;

[0032] Figure 4 It is a schematic diagram of the structure of the felt mounting frame in the painted state;

[0033] Figure 5 is a top view of Example 2;

[0034] Figure 6 This is an enlarged view of the A direction of Example 2.

[0035] The markings in the accompanying drawings are: 1-paint rack, 2-paint roller, 3-paint sleeve, 4-paint trough, 5-felt rack, 6-felt, 7-upper mounting block, 8-lower mounting block, 9-copper sleeve, 10-threaded rod, 11-U-shaped groove, 12-screw cover, 13-mounting strip, 14-stopper, 15-slot, 16-upper plate, 17-lower plate, 18-column, 19-locking screw, 20-felt box, 21-felt clamp, 22-pressing piece. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0037] Embodiment 1. A coating device based on a multi-layer composite enameled wire, comprising: Figure 1-4 As shown, it includes a paint rack 1, on which a plurality of paint roller groups are arranged side by side, the paint roller group includes a plurality of split paint rollers 2, each paint roller 2 is coaxially arranged and connected end to end, each paint roller 2 is provided with a paint sleeve 3, the paint sleeve 3 is provided with a plurality of paint dipping tanks for applying paint to the surface of the enameled wire, both ends of each paint roller 2 are rotatably connected to the paint rack 1 via an installation component, and the outside of one of the paint rollers 2 is connected to a driving mechanism; the outside of each paint roller 2 is provided with a paint tank 4, and the paint tanks 4 in the same paint roller group are interconnected via a connecting pipe, and a ball valve or a plug can be provided on the connecting pipe as needed to seal the connecting pipe; a felt rack 5 is provided on one side of the paint tank 4, and a felt 6 is placed on the felt rack 5.

[0038] The mounting assembly includes a split upper mounting block 7 and a lower mounting block 8, the middle parts of which form a rotating opening for connecting the paint roller 2, one end of the upper mounting block 7 and the lower mounting block 8 are hinged to each other, and the other ends of the upper mounting block 7 and the lower mounting block 8 are detachably connected, and the two ends of the paint roller 2 are connected to the rotating opening via a copper sleeve 9.

[0039] One end of the lower mounting block 8 is rotatably connected to a threaded rod 10, and both the upper mounting block 7 and the lower mounting block 8 are provided with a U-shaped groove 11 that matches the threaded rod 10. The end of the threaded rod 10 passes through the U-shaped groove 11 and is connected to a screw cover 12, which is used to squeeze and limit the lower mounting block 8 and the upper mounting block 7 after tightening.

[0040] The paint sleeve 3 is slidably connected to the paint roller 2, and both ends of the paint sleeve 3 are fixedly connected to the paint roller 2 via set screws.

[0041] The driving mechanism comprises a driving motor fixed on the painting frame 1, and the outside of the driving motor is connected to the painting roller 2 via a gear transmission mechanism.

[0042] The felt 6 is fixed to the felt frame 5 via a felt mounting frame, and the felt mounting frame includes an upper plate body 16 and a lower plate body 17 which are arranged side by side in an upper and lower direction, and the two ends of the upper plate body 16 and the lower plate body 17 are connected to each other via a column 18, and the two ends of the upper plate body 16 are provided with a U-shaped opening matching the column 18, so as to facilitate the operator to lift and lower the upper plate body 16 from one end, and a step surface for placing the upper plate body 16 is formed on the column 18 near one end of the felt frame 5; a locking screw 19 which is threadedly connected to the upper plate body 16 is provided on the outer side of the column 18 away from one end of the felt frame 5, and a felt box 20 is connected to the outside of the upper plate body 16 and the lower plate body 17, and a plurality of felt clips 21 are spaced apart along the length direction on the upper plate body 16 and the lower plate body 17, and the felt clips 21 of the upper plate body 16 and the lower plate body 17 are staggered left and right.

[0043] The felt box 20 is located outside one end of the upper plate body 16 and the lower plate body 17, and a shearing notch is formed at the other end of the upper plate body 16 and the lower plate body 17. During operation, the operator extends the felt outward from the shearing notch and cuts the felt after flattening it.

[0044] A baffle is provided on one side of the lower plate 17 . The baffle is multiple and spaced apart along the length direction of the lower plate 17 . The upper end of the baffle extends above the felt of the lower plate 17 . The baffle and the felt clip 21 are offset from each other.

[0045] The felt clamp 21 is L-shaped and symmetrically arranged on both sides of the upper plate 16 or the lower plate 17. The felt clamp 21 can limit the felt when it translates, preventing the felt from escaping from the felt clamp 21 and causing deviation.

[0046] Both ends of the upper plate body 16 and the lower plate body 17 are provided with a pressing piece 22 for clamping the felt 6. The pressing piece 22 can be selected as a cable tie, a pressing plate or a round nail according to needs.

[0047] The upper plate 16 and the lower plate 17 on both sides of the felt box 20 are provided with openings for the felt 6 to pass through; one end of the felt frame 5 is provided with a felt outlet connected to the opening, and the felt 6 on the lower plate 17 extends to the bottom of the felt frame 5 through the felt outlet.

[0048] The painting method based on the painting device of the multi-layer composite enameled wire comprises the following steps:

[0049] ① Adjust the shape and installation position of the paint sleeve on each paint roller according to the thickness and paint type of the paint film on the surface of the enameled wire;

[0050] ② The enameled wire is moved back and forth on the enameling machine, and the enameled wire is passed through the paint sleeves of each paint roller group in turn during the routing process, so that the paint sleeves of each paint roller group can apply different types of insulating paint to the surface of the enameled wire and form insulating paint layers of different thicknesses.

[0051] When the present embodiment is used, the operator can replace the paint sleeve 3 on the paint roller 2 according to the thickness of the paint film coated on the enameled wire and the number of paint passes, so that the enameled wire forms multiple layers of insulating paint layers of different paint types and thicknesses after painting. When it is necessary to replace the paint sleeve 3, the operator only needs to loosen the screw caps 12 at both ends of the corresponding paint roller 2 and then rotate the threaded rod 10 to release the extrusion limit on the upper mounting block 7. Then rotate and open the upper mounting block 7, remove the paint roller 2 together with the copper sleeves 9 at both ends, and the paint roller 2 can be quickly removed and the paint sleeve 3 can be replaced. After the paint sleeve 3 is replaced, the operator inserts the paint roller 2 back to its original position in the same way, and clamps the upper mounting block 7 by the cooperation of the threaded rod 10 and the screw cap 12, so that the upper mounting block 7 can squeeze and limit the copper sleeve 9 after clamping, thereby ensuring the stable rotation of the paint roller 2 relative to the copper sleeve 9 and improving its rotation smoothness.

[0052] When a large amount of oil and dirt accumulates on the surface of the felt 6 in the painting device after long-term use, and the operator needs to move and replace the felt 6, the operator can first lift the upper plate 16, then remove the pressing pieces 22 at both ends of the felt 6, and then pull the felt 6 out from the side of the shearing opening, so that the felt 6 can move along the length direction of the upper plate 16 or the lower plate 17 under the limit of the felt clamp 21 after being pulled out, and prevent the felt 6 from deviating or falling during the movement. When the felt 6 is moved into place, the operator fixes the end of the felt close to the felt box 20 through the pressing piece 22, then flattens the felt 6 outward from the other end, and finally fixes its end through the pressing piece 22, so that the felt 6 remains flat after being fixed.

[0053] Embodiment 2. A coating device based on a multi-layer composite enameled wire, comprising: Figure 5-6 As shown, it includes a paint rack 1, on which a plurality of paint roller groups are arranged side by side, the paint roller group includes a plurality of split paint rollers 2, the paint rollers 2 are coaxially arranged and connected end to end, each paint roller 2 is provided with a paint sleeve 3, the paint sleeve 3 and the paint roller 2 are key-connected, the paint sleeve 3 is provided with a plurality of paint dipping tanks for applying paint to the surface of the enameled wire, both ends of each paint roller 2 are rotatably connected to the paint rack 1 via an installation component, and the outside of one of the paint rollers 2 is connected to a driving mechanism; the outside of each paint roller 2 is provided with a paint tank 4, and the paint tanks 4 in the same paint roller group are interconnected via a connecting pipe, and a ball valve or a plug can be provided on the connecting pipe as needed to seal the connecting pipe; a felt rack 5 is provided on one side of the paint tank 4, and a felt 6 is placed on the felt rack 5.

[0054] The mounting assembly includes a split upper mounting block 7 and a lower mounting block 8, the middle parts of which form a rotating opening for connecting the paint roller 2, one end of the upper mounting block 7 and the lower mounting block 8 are hinged to each other, and the other ends of the upper mounting block 7 and the lower mounting block 8 are detachably connected, and the two ends of the paint roller 2 are connected to the rotating opening via a copper sleeve 9.

[0055] One end of the lower mounting block 8 is rotatably connected to a threaded rod 10, and both the upper mounting block 7 and the lower mounting block 8 are provided with a U-shaped groove 11 that matches the threaded rod 10. The end of the threaded rod 10 passes through the U-shaped groove 11 and is connected to a screw cover 12, which is used to squeeze and limit the lower mounting block 8 and the upper mounting block 7 after tightening.

[0056] The felt frame 5 forms a mounting strip 13 on one side close to the paint roller 2, and a nylon block 14 is detachably connected to the mounting strip 13, and the shape of the block 14 is adjusted on site according to the position of the paint sleeve 3; the paint sleeve 3 is slidably connected to the paint roller 2, and the block 14 is located on both sides of the paint sleeve 3 and is used to laterally limit the paint sleeve 3.

[0057] The mounting bar 13 is provided with a plurality of slots 15 at intervals. One end of the stopper 14 is connected with a C-shaped mounting foot made of metal. The mounting foot is buckled into the slot 15 and is screwed together with the stopper 14 to be fixed to the mounting bar 13 .

[0058] The driving mechanism comprises a driving motor fixed on the painting frame 1, and the outside of the driving motor is connected to the painting roller 2 via a gear transmission mechanism.

[0059] The felt 6 is fixed to the felt frame 5 via a felt mounting frame, and the felt mounting frame includes an upper plate body 16 and a lower plate body 17 which are arranged side by side in an upper and lower direction. The two ends of the upper plate body 16 and the lower plate body 17 are connected to each other via a column 18. Both ends of the upper plate body 16 are provided with U-shaped openings matching the columns 18, so that it is convenient for operators to lift and lower the upper plate body 16 from one end. The outer side of the column 18 away from one end of the felt frame 5 is provided with a locking screw 19 which is threadedly connected to the upper plate body 16. The outer sides of the upper plate body 16 and the lower plate body 17 are both connected with a felt box 20. A plurality of felt clips 21 are spaced apart along the length direction on the upper plate body 16 and the lower plate body 17, and the felt clips 21 of the upper plate body 16 and the lower plate body 17 are staggered left and right.

[0060] The felt box 20 is located outside one end of the upper plate body 16 and the lower plate body 17, and a shearing notch is formed at the other end of the upper plate body 16 and the lower plate body 17. During operation, the operator extends the felt outward from the shearing notch and cuts the felt after flattening it.

[0061] A baffle is provided on one side of the lower plate 17 . The baffle is multiple and spaced apart along the length direction of the lower plate 17 . The upper end of the baffle extends above the felt of the lower plate 17 . The baffle and the felt clip 21 are offset from each other.

[0062] The felt clamp 21 is L-shaped and symmetrically arranged on both sides of the upper plate 16 or the lower plate 17. The felt clamp 21 can limit the felt when it translates, preventing the felt from escaping from the felt clamp 21 and causing deviation.

[0063] Both ends of the upper plate body 16 and the lower plate body 17 are provided with a pressing piece 22 for clamping the felt 6. The pressing piece 22 can be selected as a cable tie, a pressing plate or a round nail according to needs.

[0064] The upper plate 16 and the lower plate 17 on both sides of the felt box 20 are provided with openings for the felt 6 to pass through.

[0065] Compared with Example 1, this embodiment connects the paint sleeve 3 to the paint roller 2 by a key, and uses the cooperation of the mounting strip 13 and the stop block 14 to laterally limit the paint sleeve 3. On the one hand, it can ensure the positioning accuracy of the paint sleeve 3 so that it will not produce axial movement with the paint roller 2; on the other hand, when the operator is loading and unloading the paint roller 2, there is no need to adjust the lateral position of the paint roller 2 based on the paint sleeve 3, which makes it convenient for the operator to load and unload the paint roller 2 and leaves sufficient installation clearance for the loading and unloading operation of the paint roller 2.

Claims

1. A coating device based on multi-layer composite enameled wire, characterized in that: The invention comprises a painting rack (1), on which a plurality of groups of paint rollers are arranged side by side, wherein the paint roller groups comprise a plurality of split paint rollers (2), each of which is coaxially arranged and connected end to end, each of which is provided with a paint sleeve (3), and both ends of each of which are rotatably connected to the painting rack (1) via an installation assembly, wherein the outside of one of the paint rollers (2) is connected to a driving mechanism; the outside of each of the paint rollers (2) is provided with a paint groove (4), and the paint grooves (4) in the same paint roller group are connected to each other, and a felt frame (5) is provided on one side of the paint groove (4), and a felt (6) is placed on the felt frame (5).

2. The painting device based on the multi-layer composite enameled wire according to claim 1 is characterized in that: The mounting assembly comprises a split upper mounting block (7) and a lower mounting block (8), wherein a rotating opening for connecting a paint roller (2) is formed in the middle of the upper mounting block (7) and the lower mounting block (8), one end of the upper mounting block (7) and the lower mounting block (8) are hinged to each other, and the other end of the upper mounting block (7) and the lower mounting block (8) are detachably connected, and the two ends of the paint roller (2) are connected to the rotating opening via a copper sleeve (9).

3. The painting device based on the multi-layer composite enameled wire according to claim 2 is characterized in that: One end of the lower mounting block (8) is rotatably connected to a threaded rod (10); the upper mounting block (7) and the lower mounting block (8) are both provided with a U-shaped groove (11) matching the threaded rod (10); the end of the threaded rod (10) passes through the U-shaped groove (11) and is connected to a rotary cover (12); the rotary cover (12) is used to squeeze and limit the lower mounting block (8) and the upper mounting block (7) after being tightened.

4. The painting device based on the multi-layer composite enameled wire according to claim 1 is characterized in that: The paint sleeve (3) is slidably connected to the paint roller (2), and the two ends of the paint sleeve (3) are fixedly connected to the paint roller (2) via set screws.

5. The painting device based on the multi-layer composite enameled wire according to claim 1 is characterized in that: The felt frame (5) forms a mounting strip (13) on the side close to the paint roller (2), and a stopper (14) is detachably connected to the mounting strip (13); the paint sleeve (3) is slidably connected to the paint roller (2), and the stopper (14) is located on both sides of the paint sleeve (3) and is used to limit the paint sleeve (3) laterally.

6. The painting device based on the multi-layer composite enameled wire according to claim 5 is characterized in that: A plurality of slots (15) are arranged at intervals on the mounting strip (13); one end of the stopper (14) is connected to a C-shaped mounting foot, which is buckled and connected to the slot (15) and screwed to the mounting strip (13).

7. The painting device based on the multi-layer composite enameled wire according to claim 1 is characterized in that: The felt (6) is fixed on the felt frame (5) via a felt mounting frame, and the felt mounting frame comprises an upper plate body (16) and a lower plate body (17) which are arranged side by side in an upper and lower direction, and the two ends of the upper plate body (16) and the lower plate body (17) are connected to each other via a column (18), and a locking screw (19) which is threadedly connected to the upper plate body (16) is provided on the outer side of the column (18) away from one end of the felt frame (5), and the outer sides of the upper plate body (16) and the lower plate body (17) are both connected to a felt box (20), and a plurality of felt clips (21) are spaced apart along the length direction on the upper plate body (16) and the lower plate body (17), and the felt clips (21) of the upper plate body (16) and the lower plate body (17) are arranged in a left-right offset manner.

8. The painting device based on the multi-layer composite enameled wire according to claim 7 is characterized in that: Both ends of the upper plate body (16) and the lower plate body (17) are provided with pressing pieces (22) for clamping the felt (6).

9. The painting device based on the multi-layer composite enameled wire according to claim 7, characterized in that: The upper plate body (16) and the lower plate body (17) on both sides of the felt box (20) are provided with openings for the felt (6) to pass through.

10. A coating method based on a coating device for multi-layer composite enameled wire according to claims 1 to 9, characterized in that: The following steps are involved: ① Adjust the shape and installation position of the paint sleeve on each paint roller according to the thickness and paint type of the paint film on the surface of the enameled wire; ② The enameled wire is moved back and forth on the enameling machine, and the enameled wire is passed through the paint sleeves of each paint roller group in turn during the routing process, so that the paint sleeves of each paint roller group can apply different types of insulating paint to the surface of the enameled wire and form insulating paint layers of different thicknesses.

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