A refrigerant-resistant enameled wire production coating device

Abstract

The application discloses a kind of refrigerant-resistant enameled wire production coating devices, it is related to the technical field of enameled wire production.It includes: workbench and multiple coating molds installed in the inside of workbench, multiple coating molds pass through enameled wire between every two interval, drying oven for drying enameled wire after painting is arranged between every two interval, and drying oven is installed in the inside of workbench;The application utilizes the composite motion of enameled wire linear traction and oblique spur circumferential rotation to process continuous spiral groove on the surface of each layer of paint film, changes the multi-layer paint film from traditional plane bonding to three-dimensional embedded mechanical occlusion structure, effectively improves the overall bonding strength and density of paint film, solves the problem that traditional refrigerant-resistant enameled wire paint film is easy to delaminate, delaminates, refrigerant penetrates, significantly enhances the insulation stability and service life of enameled wire under refrigerant immersion, high-low temperature alternating condition.

Description

Technical Field

[0001] This invention relates to the field of enameled wire production technology, specifically to a coating device for producing refrigerant-resistant enameled wire. Background Technology

[0002] Refrigerant-resistant enameled wire is a core insulating conductor in high-end equipment such as refrigeration compressors, new energy temperature control equipment, and heat pump systems. It operates under harsh conditions including refrigerant immersion, alternating high and low temperature cycles, pressure fluctuations, and high-frequency vibrations. The bonding strength, density, and impermeability of its enamel film directly determine the overall insulation safety and service life of the equipment. Currently, traditional refrigerant-resistant enameled wire coating processes mostly employ multi-layer flat coating and self-leveling curing. The coating mold only performs a simple coating operation, and after the enamel film is formed, the layers are only bonded together by the adhesive properties of the enamel itself.

[0003] The existing traditional refrigerant-resistant enameled wire coating technology mainly faces the following core technical problems in actual production and application:

[0004] 1. Low interlayer bonding strength and poor adhesion stability of paint film. Traditional coating processes can only achieve planar bonding of multiple layers of paint film, with limited interlayer contact area and no mechanical interlocking structure. The interlayer adhesion relies entirely on the adhesive force of the paint itself, resulting in weak structural stability. Under the vibration and bending stress generated by equipment operation, the paint film is prone to interlayer loosening, peeling, and flaking.

[0005] 2. Insufficient resistance to refrigerant penetration and poor insulation reliability. The internal structure of traditionally flat-laid enamel films has limited density, and there are tiny gaps between the layers. Refrigerant molecules can easily penetrate through these gaps into the interior of the enamel film and even the surface of the copper wire substrate. Under long-term refrigerant immersion conditions, the enamel film will gradually corrode and damage the insulation structure, leading to a decrease in the insulation performance of the enameled wire and causing safety hazards such as leakage and breakdown. Summary of the Invention

[0006] The purpose of this invention is to address the problems of existing traditional refrigerant-resistant enameled wire coating technologies, which mostly employ flat-lay bonding molding. These technologies lack mechanical interlocking structures between the enameled wire layers, have small contact areas, low bonding strength, and are prone to forming fine gaps between layers. This not only leads to loosening, peeling, and flaking of the enameled wire under vibration and bending stress, but also to refrigerant penetration corrosion, resulting in decreased insulation reliability and potential leakage and breakdown hazards. The invention provides a refrigerant-resistant enameled wire production coating device.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a coating apparatus for producing refrigerant-resistant enameled wire, comprising: a workbench and a plurality of coating molds installed inside the workbench, with enameled wire passing through the plurality of coating molds, and a drying chamber for drying the coated enameled wire between every two spaced coating molds, the drying chamber being installed inside the workbench; a swirling auxiliary device located at the front end of the longitudinally arranged coating molds, for forming spiral grooves in the paint on the outer wall of the coated enameled wire, for forming interlocking between each layer of paint during multi-coating process, the swirling auxiliary device including a plurality of oblique spikes disposed at the end of the coating mold, the plurality of oblique spikes being evenly distributed around the end of the coating mold.

[0008] As a further embodiment of the present invention: the swirl aid further includes a rotating seat rotatably connected to the end of the coating mold, and a first suspension seat fixedly connected to the outer wall of the coating mold. A first servo motor is installed on one side of the first suspension seat, and a first spur gear is fixedly connected to the output end of the first servo motor through the outside of the first suspension seat. A first spur gear ring meshing with the first spur gear is fixedly connected to the outer wall of the rotating seat.

[0009] As a further embodiment of the present invention: the longitudinally arranged coating mold is divided into three stages at equal intervals according to the number of coating processes: front-end coating, middle-end coating and tail-end coating. During the front-end coating, the number of oblique burrs is less than that during the tail-end coating and less than that during the middle-end coating.

[0010] As a further aspect of the present invention, the depth to which the longitudinally arranged oblique thorns are inserted into the paint gradually increases from the initial coating to the final coating.

[0011] As a further embodiment of the present invention: the end of the rotating seat is provided with a plurality of connecting seats, and each connecting seat is correspondingly provided on one side of the oblique thorn. The connecting seat is fixedly connected to an auxiliary seat, and an adjustment auxiliary component for adjusting the extension length of the oblique thorn is provided between the oblique thorn and the auxiliary seat.

[0012] As a further embodiment of the present invention: the adjustment auxiliary component includes an adjustment screw rotatably connected to the inner side of the auxiliary seat, the end of the adjustment screw extending through to the outside of the auxiliary seat and fixedly connected to a bevel gear, the outer wall of the adjustment screw being threadedly connected to a sliding sleeve, and one end of the sliding sleeve being fixedly connected to the oblique thorn.

[0013] As a further embodiment of the present invention: a slider is fixedly connected to the outer wall of the sliding sleeve, and a limiting groove matching the slider is provided on the inner side of the auxiliary seat. The sliding sleeve is slidably connected to the auxiliary seat through two sliders fixedly connected to the outer wall.

[0014] As a further embodiment of the present invention: the adjustment auxiliary component further includes a rotating ring rotatably connected to the end of the rotating seat, a bevel gear ring fixedly connected to the end of the rotating ring, and the bevel gear ring meshing with the bevel gear, a second spur gear ring fixedly connected to the outer wall of the rotating ring, a second suspension seat fixedly connected to the outer wall of the rotating seat, a second servo motor mounted on one side of the second suspension seat, and the output end of the second servo motor passing through the outer wall of the second suspension seat and fixedly connected to a second spur gear meshing with the second spur gear ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention employs a pre-set inclined installation structure for the oblique thorn and a segmented differentiated structure that eliminates the need for swirling grooves in the final coating mold. Combined with a gear linkage rotation mechanism consisting of a first servo motor, a first spur gear, a first spur gear ring, and a rotating seat, the invention utilizes the combined motion of linear traction of the enameled wire and the circular rotation of the oblique thorn to process continuous spiral grooves on the surface of each layer of enamel film. This transforms the traditional planar bonding of the multi-layer enamel film into a three-dimensional interlocking mechanical structure, effectively improving the overall bonding strength and density of the enamel film. It solves the problems of easy delamination, peeling, and refrigerant penetration of the enamel film in traditional refrigerant-resistant enameled wires, and significantly enhances the insulation stability and service life of the enameled wire under refrigerant immersion and high / low temperature alternating conditions.

[0017] 2. This invention limits the gradient relationship of the number of oblique punctures at the front, tail, and middle coating stations, and adopts a segmented gradient shaping structure with gradually increasing oblique puncture insertion depth along the coating direction of the enameled wire. It can complete differentiated spiral groove processing according to the different forming characteristics of the primer, medium-thick paint layer, and thick paint layer. This effectively protects the enameled wire substrate and avoids primer forming defects, while strengthening the interlocking effect between paint film layers layer by layer. It greatly improves the overall bonding firmness, density, and structural stability of the paint film, and solves the problems of poor interlocking effect, easy peeling of paint layer, and poor forming consistency in traditional uniform coating process.

[0018] 3. This invention uses a PLC controller to link a second servo motor, a second spur gear, a second spur gear ring, a bevel gear ring, and an adjusting screw to form a synchronous adjustment transmission structure, thereby achieving automated and precise adjustment of the insertion depth of the oblique thorn. It can match the gradient coating process of shallow front grooving, standard middle grooving, and deep tail grooving as needed, and adapt to the coating pattern of enameled wire with progressively thicker layers, effectively improving the versatility and overall practicality of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2This is a cross-sectional view of the coating mold of the present invention;

[0021] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the front end structure of the coating mold of the present invention;

[0023] Figure 5 This is a schematic diagram of the swirl aid structure of the present invention;

[0024] Figure 6 For the present invention Figure 5 Enlarged view at point B in the middle;

[0025] Figure 7 This is a schematic diagram of the rotating seat structure of the present invention;

[0026] Figure 8 This is a cross-sectional view of the auxiliary support of the present invention.

[0027] In the diagram: 1. Workbench; 2. Coating mold; 3. Enameled wire; 4. Rotating seat; 5. First suspension seat; 6. First servo motor; 7. First spur gear; 8. First spur gear ring; 9. Slanted spur; 10. Auxiliary seat; 11. Connecting seat; 12. Second suspension seat; 13. Second spur gear; 14. Second spur gear ring; 15. Rotating ring; 16. Bevel gear ring; 17. Bevel gear; 18. Adjusting screw; 19. Sliding sleeve; 20. Slider; 21. Second servo motor. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0030] Please see Figures 1 to 8 This embodiment provides a coating apparatus for producing refrigerant-resistant enameled wire, including: a workbench 1 and multiple coating molds 2 installed inside the workbench 1, with enameled wire 3 passing through the multiple coating molds 2. A drying box for drying the coated enameled wire 3 is provided between every two spaced coating molds 2, and the drying box is installed inside the workbench 1; a swirling auxiliary device is located at the front end of the longitudinally arranged coating molds 2, used to form spiral grooves in the paint on the outer wall of the coated enameled wire 3, so that each layer of paint can form an interlocking effect during the multi-coating process. The swirling auxiliary device includes multiple oblique spikes 9 disposed at the end of the coating molds 2, and the multiple oblique spikes 9 are evenly distributed around the end of the coating molds 2. It also includes a rotating seat 4 rotatably connected to the end of the coating mold 2, and a first suspension seat 5 fixedly connected to the outer wall of the coating mold 2. A first servo motor 6 is installed on one side of the first suspension seat 5. The output end of the first servo motor 6 passes through to the outside of the first suspension seat 5 and is fixedly connected to a first spur gear 7. A first spur gear ring 8 that meshes with the first spur gear 7 is fixedly connected to the outer wall of the rotating seat 4. The longitudinally arranged coating mold 2 is divided into three stages at equal intervals according to the number of coating processes: front coating, middle coating and tail coating. In the front coating, the number of oblique punctures 9 is less than that in the tail coating and less than that in the middle coating. The depth of the longitudinally arranged oblique punctures 9 inserted into the paint gradually increases from the beginning of the coating to the last coating.

[0031] The oblique stab 9 adopts a pre-set inclined installation structure. During the operation, the oblique stab 9 is only inserted into the fresh coating liquid on the outer wall of the enameled wire 3, without touching or damaging the metal core substrate of the enameled wire 3. At the same time, it adopts a segmented differentiated structure design, eliminating the swirl auxiliary device at the end of the last coating mold 2 and the slotted structure of the oblique stab 9. During the production process, the enameled wire 3 is pulled at a constant speed by a special traction device, continuously passing through multiple sets of coating molds 2 to complete multiple layers of coating operations. During the synchronous coating operation of the enameled wire 3, the first servo motor 6 is started, and power is output through the output end of the first servo motor 6 to drive the first spur gear 7 to rotate in a circular motion. Utilizing the gear meshing transmission principle, the first spur gear ring 8, which meshes with the first spur gear 7, is driven to rotate synchronously, thereby driving the rotating seat 4 assembled at the end of the coating mold 2 to rotate in a circular motion. Ultimately, this drives the multiple sets of oblique thorns 9 arranged around the end of the rotating seat 4 to rotate synchronously. The composite relative motion of the enameled wire 3 being pulled at a uniform linear speed and the oblique thorns 9 rotating synchronously in a circular motion allows the oblique thorns 9, in their inclined state, to uniformly scrape and shape the surface of the liquid paint layer that has just been coated and has not yet cured on the coating mold 2. The outer wall paint layer surface is processed with continuous and uniform spiral grooves. When the enameled wire 3 completes multiple coating operations through multiple sets of coating molds 2, the fresh paint liquid applied later can fully fill the spiral grooves formed by the swirling process of the previous layer of paint film. After the paint layer is dried and cured, the two adjacent paint films form a stable spiral mechanical interlocking structure, which upgrades the traditional simple planar bonding to a three-dimensional interlocking structure. This effectively improves the overall bonding strength and density of the multi-layer paint film, and completely improves the defects of the paint film of the refrigerant-resistant enameled wire that is easy to delaminate, peel off, and easily penetrated by the refrigerant. This greatly improves the insulation stability and service life of the enameled wire 3 under refrigerant immersion and high and low temperature alternating conditions.

[0032] The number of oblique punctures 9 in the three-stage process is limited to the following ratio: number of oblique punctures 9 at the front end < number of oblique punctures 9 at the tail end < number of oblique punctures 9 at the middle end. Simultaneously, along the traction coating direction of the enameled wire 3, the depth of the oblique punctures 9 inserted into the paint at each station is progressively increased. When the enameled wire 3 is tractioned at a constant speed through each set of coating molds 2 to complete the coating operation, the rotating seat 4 at each station drives the corresponding number and insertion depth of oblique punctures 9 to rotate synchronously. At different coating stages—front end, middle end, and tail end—the fresh paint on the surface of the enameled wire 3 is shaped into spiral patterns of different densities and groove depths. This process, combined with multiple coating processes, achieves gradient-style layer-by-layer shaping.

[0033] The initial coating process is a primer application. The initial coating layer on the surface of the enameled wire 3 is the thinnest, with high fluidity and weak forming stability. By using a small number of oblique punctures 9 inserted shallowly into the coating, preliminary fine spiral grooves can be formed on the surface of the primer, providing a basic interlocking structure for the second coating layer. This effectively avoids excessive number of oblique punctures 9 or excessive insertion that penetrates the thin coating layer, preventing the oblique punctures 9 from touching or scratching the metal substrate of the enameled wire 3. At the same time, it prevents the primer layer grooves from being too deep, resulting in sagging and edge collapse defects, ensuring the integrity of the base coating layer and the insulation performance of the substrate.

[0034] Setting the maximum number of oblique burrs 9 at the mid-coating station can significantly improve the distribution density and texture uniformity of the spiral grooves on the paint layer surface, maximizing the interlocking contact area between upper and lower paint layers; combined with a suitable insertion depth, it can construct regular and stable three-dimensional interlocking textures, completely solving the defects of insufficient interlocking points and insufficient bonding strength in traditional uniform coating processes, and significantly improving the overall bonding firmness of multi-layer paint films.

[0035] During the tail-end coating stage, the cumulative paint layer thickness on the surface of the enameled wire 3 is the largest, the paint curing rate is faster, and the structural stability is stronger. The number of oblique barbs 9 is less than that in the middle but more than that in the front, and the depth of the oblique barbs 9 into the paint reaches the maximum value. Deeper and more three-dimensional spiral interlocking grooves can be processed for thick paint layers. This can effectively solve the problems of insufficient shaping of thick paint layers and insufficient interlocking depth, which lead to easy peeling of the surface paint layer and loose bonding. It further strengthens the interlocking effect of thick paint layers and improves the overall paint layer density and structural stability.

[0036] Please see Figures 3-8The rotating seat 4 has multiple connecting seats 11 at its end, and each connecting seat 11 is correspondingly located on one side of the oblique spur 9. An auxiliary seat 10 is fixedly connected to each connecting seat 11. An adjustment auxiliary assembly for adjusting the extension length of the oblique spur 9 is provided between the oblique spur 9 and the auxiliary seat 10. The adjustment auxiliary assembly includes an adjusting screw 18 rotatably connected to the inner side of the auxiliary seat 10. A bevel gear 17 is fixedly connected to the end of the adjusting screw 18 extending to the outside of the auxiliary seat 10. A sliding sleeve 19 is threaded onto the outer wall of the adjusting screw 18, and one end of the sliding sleeve 19 is fixedly connected to the oblique spur 9. A slider 20 is fixedly connected to the outer wall of the sliding sleeve 19. A connection between the slider 20 and the inner side of the auxiliary seat 10 is provided. The sliding sleeve 19 is slidably connected to the auxiliary seat 10 through two sliders 20 fixedly connected to the outer wall. The adjustment auxiliary component also includes a rotating ring 15 rotatably connected to the end of the rotating seat 4. A bevel gear ring 16 is fixedly connected to the end of the rotating ring 15, and the bevel gear ring 16 is meshed with the bevel gear 17. A second spur gear ring 14 is fixedly connected to the outer wall of the rotating ring 15. A second suspension seat 12 is fixedly connected to the outer wall of the rotating seat 4. A second servo motor 21 is installed on one side of the second suspension seat 12. The output end of the second servo motor 21 passes through the outer wall of the second suspension seat 12 and is fixedly connected to a second spur gear 13 that meshes with the second spur gear ring 14.

[0037] When the insertion depth of the oblique spur 9 is adjusted according to different practical situations, the second servo motor 21 is started by the PLC controller. The output end of the second servo motor 21 drives the second spur gear 13 to rotate in a circle, thereby driving the second spur gear ring 14 to drive the bevel gear ring 16 to rotate in a circle through the rotating ring 15. This drives multiple bevel gears 17 to drive an adjusting screw 18 to rotate in a circle, thereby driving the oblique spur 9 to adjust its length. It can match the gradient process requirements of shallow grooving of thin paint layer at the front end, standard grooving of paint layer in the middle end, and deep grooving of thick paint layer at the tail end as needed, and adapt to the coating law of progressively thickening enameled wire 3, thereby improving the overall practicality of the device.

[0038] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coating apparatus for producing refrigerant-resistant enameled wire, characterized in that, include: A workbench (1) and a plurality of coating molds (2) installed inside the workbench (1), with enameled wire (3) passing between the plurality of coating molds (2), and a drying box for drying the enameled wire (3) after coating is provided between every two spaced coating molds (2), and the drying box is installed inside the workbench (1). The swirling aid is located at the front end of the longitudinally arranged coating mold (2) and is used to form a spiral groove in the paint on the outer wall of the enameled wire (3) after coating, so that each layer of paint can be interlocked during the multi-coating process. The swirling aid includes a plurality of oblique thorns (9) disposed at the end of the coating mold (2), and the plurality of oblique thorns (9) are distributed at equal distances around the end of the coating mold (2).

2. A refrigerant-resistant enameled wire production coating apparatus according to claim 1, characterized in that, The swirling aid also includes a rotating seat (4) rotatably connected to the end of the coating mold (2), and a first suspension seat (5) fixedly connected to the outer wall of the coating mold (2). A first servo motor (6) is installed on one side of the first suspension seat (5). The output end of the first servo motor (6) extends through to the outside of the first suspension seat (5) and is fixedly connected to a first spur gear (7). A first spur gear ring (8) meshing with the first spur gear (7) is fixedly connected to the outer wall of the rotating seat (4).

3. The production coating apparatus for a refrigerant-resistant enameled wire according to claim 2, characterized by The coating mold (2) arranged longitudinally is divided into three stages: front coating, middle coating and tail coating, according to the number of coating processes. During the front coating, the number of oblique thorns (9) is less than that during the tail coating and less than that during the middle coating.

4. The refrigerant-resistant enameled wire production coating device according to claim 3, characterized in that, The depth of the longitudinally arranged oblique thorns (9) inserted into the paint is gradually increased from the first coating to the last coating.

5. The refrigerant-resistant enameled wire production coating device according to claim 2, characterized in that, The rotating seat (4) is provided with a plurality of connecting seats (11) at its end, and each connecting seat (11) is provided on one side of the oblique spur (9). The connecting seat (11) is fixedly connected to an auxiliary seat (10), and an adjustment auxiliary component for adjusting the extension length of the oblique spur (9) is provided between the oblique spur (9) and the auxiliary seat (10).

6. The refrigerant-resistant enameled wire production coating apparatus according to claim 5, characterized in that, The adjustment auxiliary assembly includes an adjustment screw (18) rotatably connected to the inner side of the auxiliary seat (10). The end of the adjustment screw (18) extends through to the outside of the auxiliary seat (10) and is fixedly connected to a bevel gear (17). The outer wall of the adjustment screw (18) is threadedly connected to a sliding sleeve (19), and one end of the sliding sleeve (19) is fixedly connected to the oblique thorn (9).

7. The refrigerant-resistant enameled wire production coating apparatus according to claim 6, characterized in that, The outer wall of the sliding sleeve (19) is fixedly connected to a slider (20), and the inner side of the auxiliary seat (10) is provided with a limiting groove that matches the slider (20). The sliding sleeve (19) is slidably connected to the auxiliary seat (10) through two sliders (20) fixedly connected to the outer wall.

8. The refrigerant-resistant enameled wire production coating apparatus according to claim 7, characterized in that, The adjustment auxiliary component also includes a rotating ring (15) rotatably connected to the end of the rotating seat (4). A bevel gear ring (16) is fixedly connected to the end of the rotating ring (15), and the bevel gear ring (16) meshes with the bevel gear (17). A second spur gear ring (14) is fixedly connected to the outer wall of the rotating ring (15). A second suspension seat (12) is fixedly connected to the outer wall of the rotating seat (4). A second servo motor (21) is installed on one side of the second suspension seat (12). The output end of the second servo motor (21) passes through the outer wall of the second suspension seat (12) and is fixedly connected to a second spur gear (13) that meshes with the second spur gear ring (14).

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