Uniform coating device and process for priming paint and finishing paint of enameled wire

Abstract

The invention discloses a uniform coating device and process for primer and finish paint of an enameled wire, the coating device comprises a support and a conveying mechanism, the support is further provided with a primer coating mechanism and a finish paint coating mechanism which are sequentially arranged along the conveying direction of the enameled wire, and the primer coating mechanism and the finish paint coating mechanism are sequentially arranged along the conveying direction of the enameled wire. A bubble removing assembly is arranged between the primer coating mechanism and the finish coating mechanism and comprises a heating sleeve which is arranged on the support and allows the enameled wire to penetrate through. Uniform pressure is applied to the enameled wire through the elastic pressing wheel, solvent steam is discharged in time in combination with the heating effect that heating airflow enters the heating sleeve to heat primer, the coating problem caused by steam condensation and bubble generation during follow-up finish paint coating are avoided, and it is ensured that the coating process is stable and efficient; and the coating effect and the stability of the primer and the finish paint of the enameled wire are improved.

Description

Technical Field

[0001] The invention relates to the field of enameled wire coating equipment, and in particular to a uniform coating device and process for primer and topcoat of enameled wire. Background Art

[0002] Enameled wire painting is a common process for protecting enameled wire. Traditional enameled wire painting is done using a felt layer, which is fixed by two clamping structures at the upper and lower ends. The enameled wire passes through the felt layer to achieve the painting operation of the enameled wire. Although the enameled wire painting operation can be performed using a felt layer, when using a traditional felt layer for painting, only one paint surface can be applied, and primer and topcoat cannot be applied on one painting equipment without replacing the felt layer.

[0003] In the prior art, for example, a Chinese invention patent application (publication number CN110586409A) discloses a painting device for primer and topcoat coating of enameled wire, the structure of which includes a placement plate, on which a primer coating mechanism for primer coating and a topcoat coating mechanism for topcoat coating are provided, and a paint storage portion for storing paint is provided below the primer coating mechanism and the topcoat coating mechanism respectively; the paint storage portion includes a paint storage box; the primer coating mechanism includes a first rotating shaft, on which a paint roller shaft is provided; the topcoat coating mechanism includes a second rotating shaft, on which a paint roller shaft is provided; the paint roller shaft is provided with a routing portion for routing the enameled wire; the routing portion includes a plurality of routing grooves; the paint roller shafts on the first rotating shaft and the second rotating shaft are spaced apart; the paint roller shaft on the first rotating shaft and the paint roller shaft on the second rotating shaft are staggered; the first rotating shaft and the second rotating shaft are connected to a driving portion for controlling the rotation of the first rotating shaft and the second rotating shaft.

[0004] According to the above-mentioned prior art, the painting device can realize the same enameled wire to be coated with primer and topcoat by setting a primer coating mechanism and a topcoat coating mechanism on the same painting device. However, after the primer coating is completed, if the solvent or water in the primer is not completely volatilized, when the topcoat is applied, the residual material is affected by heat or pressure, and the gas formed by the evaporation of the solvent or water is enclosed between the primer and the topcoat, which may cause bubbles. Therefore, there is a need for a coating device that can eliminate bubbles and ensure uniform coating of the primer and topcoat. Summary of the invention

[0005] In view of the problems existing in the prior art, a uniform coating device for primer and topcoat of enameled wire is provided. Uniform pressure is applied to the enameled wire through an elastic pressure wheel, and the primer is heated by the heated air flow entering the heating sleeve to discharge the solvent vapor in time, so as to avoid coating problems caused by steam condensation and the generation of bubbles during subsequent topcoat coating, thereby ensuring a stable and efficient coating process and improving the coating effect and stability of the primer and topcoat of the enameled wire.

[0006] In order to solve the problems of the prior art, the present invention provides a uniform coating device for primer and topcoat of enameled wire, comprising a bracket and a conveying mechanism arranged on the bracket for conveying the enameled wire, the bracket is also provided with a primer coating mechanism and a topcoat coating mechanism arranged in sequence along the conveying direction of the enameled wire, the primer coating mechanism and the topcoat coating mechanism both have a felt layer that wraps the enameled wire, a debubbling assembly is provided between the primer coating mechanism and the topcoat coating mechanism, the debubbling assembly comprises a heating sleeve arranged on the bracket for the enameled wire to pass through, the inner diameter of the heating sleeve is larger than the diameter of the enameled wire, when the heating sleeve is in a working state, the solvent in the primer on the surface of the enameled wire is accelerated to volatilize, and the heating sleeve is provided with a supporting structure for keeping the enameled wire coaxial with the heating sleeve.

[0007] Preferably, the defoaming assembly also includes elastic pressure wheels symmetrically arranged on the upper and lower sides of the heating sleeve, and the two elastic pressure wheels are both capable of moving along an axial direction perpendicular to the heating sleeve. The heating sleeve is provided with an opening for the elastic pressure wheels to pass through. When the two elastic pressure wheels squeeze the enameled wire, the primer is in a compacted state so that the solvent therein migrates to the surface.

[0008] Preferably, the front and rear ends of the heating sleeve are respectively provided with an air inlet and an air outlet connected thereto, and a negative pressure path for air flow is formed between the air inlet and the air outlet. When the air flow is in operation, the vapor volatilized from the solvent in the primer of the enameled wire passing through the heating sleeve is in a state of being rapidly discharged.

[0009] Preferably, the opening on the heating sleeve is provided with a sealing gasket that can adapt to the elastic pressure wheel, and a support structure is provided at both ends of the heating sleeve. The support structure is specifically an air cushion arranged around the enameled wire. When the enameled wire passes through the heating sleeve, a sealed space is formed inside the heating sleeve.

[0010] Preferably, a shell is provided at a position corresponding to each elastic pressure wheel on the bracket, and the elastic pressure wheel is rotatably arranged on the shell. A drainage channel is provided at a position opposite to the elastic pressure wheel on each shell to guide gas to impact the surface of the elastic pressure wheel to achieve a cleaning effect, and the surface of the elastic pressure wheel has a flexible layer.

[0011] Preferably, an air inlet and an air outlet are provided on the heating sleeve and on both sides of each drainage channel, and an air inlet pipe and an air outlet pipe connected to each air inlet and air outlet are respectively provided on the outer shell, and a branch pipe is connected between each air inlet pipe and the corresponding drainage channel.

[0012] Preferably, each air inlet duct is provided with a heating layer for achieving a heating effect so that the airflow entering the heating sleeve is hot air.

[0013] Preferably, the primer coating mechanism and the topcoat coating mechanism respectively have two coating rollers for clamping the enameled wire therein, each coating roller is surrounded by the felt layer, and each coating roller is rotatably arranged on the outer shell. When the felt layer on the coating roller contacts the enameled wire, the flexible layer on the elastic pressure wheel is in contact with the enameled wire at the same time.

[0014] Preferably, the coating roller of the primer coating mechanism has a roller shaft rotatably arranged on the shell, and the elastic pressure wheel has a pressure wheel shaft rotatably arranged on the shell, and a synchronous belt is provided between the roller shaft and the pressure wheel shaft on each shell.

[0015] The present invention also provides a uniform coating process for primer and topcoat of enameled wire, comprising the following steps: S1. The enameled wire is sent to the primer coating mechanism through the conveying mechanism to complete the primer coating; S2, the enameled wire after primer coating enters the heating sleeve of the defoaming component to accelerate the volatilization of the solvent in the primer; S3. The enameled wire treated by the defoaming component enters the topcoat coating mechanism to complete the topcoat coating.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention applies uniform pressure to the enameled wire through an elastic pressure wheel, thereby achieving compaction of the primer coating and migration of the solvent to the surface. Combined with the heating effect of the heating sleeve, the volatilization of the solvent is significantly accelerated, and residual bubbles are effectively reduced.

[0017] At the same time, the elastic pressure wheel makes the primer surface smoother and denser, enhances the coating's ability to resist temperature and pressure changes, and reduces the risk of bubbles during subsequent topcoat application. This ensures a stable and efficient coating process, improving primer adhesion quality and overall coating performance.

[0018] 2. The present invention forms a negative pressure path through the air inlet and outlet of the heating sleeve, and combines with an external exhaust device to achieve timely discharge of solvent vapor, thereby avoiding coating quality problems caused by steam condensation and the generation of bubbles during subsequent topcoat coating.

[0019] During the enameled wire conveying process, the air cushion scrapes off the excess primer, improving the flatness and uniformity of the primer coating, while protecting the surface of the enameled wire from scratches. In addition, the sealing gasket and air cushion ensure the airtightness inside the heating sleeve, preventing impurities from entering, and improving the coating effect and stability of the enameled wire.

[0020] 3. The present invention arranges a drainage channel and a branch pipe on the outer shell, and guides the airflow introduced from the air inlet to the drainage channel through the branch pipe, so as to form a high-speed airflow to impact the surface of the elastic pressure wheel, thereby realizing automatic cleaning of the flexible layer thereof and preventing primer residue from affecting the coating quality.

[0021] At the same time, the hot air flow enters the heating sleeve to accelerate the volatilization of the solvent in the primer, ensuring that the subsequent coating of the topcoat will not produce bubbles and improving the coating uniformity of the overall coating of the enameled wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a three-dimensional structural schematic diagram of a device for uniformly coating primer and topcoat of enameled wire.

[0023] Figure 2 The present invention is a planar cross-sectional view of a device for uniformly coating primer and topcoat of enameled wires.

[0024] Figure 3 The present invention is a three-dimensional structural cross-sectional view of a device for uniformly coating primer and topcoat of enameled wires.

[0025] Figure 4 The present invention is a three-dimensional structural schematic diagram of a primer coating mechanism and a defoaming component of a device for uniformly coating primer and topcoat of enameled wire.

[0026] Figure 5 The present invention is a schematic diagram of the stereoscopic structure of a defoaming component of a device for uniformly coating primer and topcoat of enameled wire.

[0027] Figure 6 The present invention is a schematic diagram of the three-dimensional structure decomposition of a defoaming component of a device for uniformly coating primer and topcoat of enameled wire.

[0028] Figure 7 The utility model is a left side view of a defoaming component of a device for uniformly coating primer and topcoat of enameled wire according to the present invention.

[0029] Figure 8 The present invention is a planar cross-sectional view of a defoaming component of a device for uniformly coating primer and topcoat of enameled wires.

[0030] Fig. 9 The present invention Figure 7 A cross-sectional view of the three-dimensional structure at AA.

[0031] Fig.10 The present invention is a partial three-dimensional structural cross-sectional view of a heating sleeve and an elastic pressure wheel of a device for uniformly coating primer and topcoat of enameled wires.

[0032] The numbers in the figure are: 1. bracket; 11. shell; 111. drainage channel; 112. branch pipe; 2. primer coating mechanism; 21. coating roller; 211. through hole; 22. felt layer; 3. topcoat coating mechanism; 4. defoaming assembly; 41. heating sleeve; 411. air inlet; 4111. air inlet pipe; 4112. heating layer; 4113. hose; 412. air outlet; 4121. air outlet pipe; 42. elastic pressure wheel; 421. flexible layer; 422. roller shaft; 423. pressure wheel shaft; 424. synchronous belt; 43. sealing gasket; 5. supporting structure; 6. enameled wire. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] See also Figure 1-Figure 6 and Fig. 9 As shown, a uniform coating device for primer and topcoat of enameled wire comprises a bracket 1 and a conveying mechanism arranged on the bracket 1 for conveying the enameled wire 6, the bracket 1 is also provided with a primer coating mechanism 2 and a topcoat coating mechanism 3 arranged in sequence along the conveying direction of the enameled wire 6, the primer coating mechanism 2 and the topcoat coating mechanism 3 both have a felt layer 22 wrapping the enameled wire 6, a debubbling assembly 4 is arranged between the primer coating mechanism 2 and the topcoat coating mechanism 3, the debubbling assembly 4 comprises a heating sleeve 41 arranged on the bracket 1 for the enameled wire 6 to pass through, the inner diameter of the heating sleeve 41 is larger than the diameter of the enameled wire 6, when the heating sleeve 41 is in working state, the solvent in the primer on the surface of the enameled wire 6 is accelerated to volatilize, and the heating sleeve 41 is provided with a supporting structure 5 for keeping the enameled wire 6 coaxial with the heating sleeve 41.

[0035] The conveying mechanism is not shown in the figure.

[0036] A plurality of heating sleeves 41 are evenly spaced on the bracket 1 , and an enameled wire 6 passes through each of the heating sleeves 41 . By providing a plurality of heating sleeves 41 , a plurality of enameled wires 6 can be coated with primer and topcoat and bubble treatment can be performed simultaneously.

[0037] When the enameled wire 6 is introduced into the conveying mechanism from one end, the conveying mechanism smoothly conveys the enameled wire 6 to the working area of ​​the coating device. The conveying mechanism ensures that the enameled wire 6 remains straight and is not twisted or stretched during the entire conveying process, thereby providing a good foundation for subsequent coating.

[0038] When the enameled wire 6 reaches the primer coating mechanism 2, it first contacts the felt layer 22. The felt layer 22 contains a certain amount of primer liquid. When the enameled wire 6 passes through the felt layer 22, the primer will be evenly applied to the surface of the enameled wire 6. When the enameled wire 6 leaves the primer coating mechanism 2, it immediately enters the heating sleeve 41 in the defoaming component 4. The inner diameter of the heating sleeve 41 is larger than the diameter of the enameled wire 6, ensuring that the enameled wire 6 can move freely therein without excessive friction. The main function of the heating sleeve 41 is to accelerate the volatilization of the solvent in the primer on the surface of the enameled wire 6. When the heating sleeve 41 is in working condition, its internal temperature rises, causing the solvent in the primer to evaporate rapidly. It is conducive to the subsequent coating of the topcoat, preventing the residual material from being affected by heat or pressure after the primer is coated with the topcoat, resulting in bubbles, and ensuring the uniform coating of the overall coating of the enameled wire 6.

[0039] At the same time, the support structure 5 provided on the heating sleeve 41 ensures that the enameled wire 6 always remains coaxial with the heating sleeve 41, thereby preventing the primer from being excessively rubbed by the inner wall of the heating sleeve 41 due to position offset, thereby affecting the uniform distribution of the primer.

[0040] After the enameled wire 6 has completed the volatilization of the solvent in the primer, it continues to move toward the topcoat coating mechanism 3. The function of the topcoat coating mechanism 3 is similar to that of the primer coating mechanism 2, but its main task is to further form a smooth and wear-resistant topcoat coating on the basis of the primer coating. The topcoat coating mechanism 3 also uses a felt layer 22 that wraps the enameled wire 6, and the interior of the felt layer 22 is soaked with a topcoat solution. When the enameled wire 6 passes through the felt layer 22, the topcoat will evenly cover the primer coating.

[0041] When the enameled wire 6 is finished with the topcoat, the whole uniform coating process is finished. At this point, the enameled wire 6 has been provided with a complete primer and topcoat coating.

[0042] See also Figure 1-Figure 10 As shown, the defoaming component 4 also includes elastic pressure wheels 42 symmetrically arranged on the upper and lower sides of the heating sleeve 41. The two elastic pressure wheels 42 can move along the axial direction perpendicular to the heating sleeve 41. The heating sleeve 41 is provided with an opening for the elastic pressure wheels 42 to pass through. When the two elastic pressure wheels 42 squeeze the enameled wire 6, the primer is in a compacted state to allow the solvent therein to migrate to the surface.

[0043] When the enameled wire 6 passes through the heating sleeve 41, the two elastic pressure wheels 42 apply appropriate pressure to the enameled wire 6. When the two elastic pressure wheels 42 squeeze the enameled wire 6, the primer coating is in a compacted state. Since the solvent has a certain fluidity, it will preferentially diffuse from the inside of the coating to the surface under external pressure. That is, the solvent in the primer will be squeezed and forced to migrate to an area with less pressure, that is, the surface of the primer. With the heating efficiency of the heating sleeve 41, the speed of solvent volatilization is significantly accelerated, and at the same time, the residual bubbles inside the primer coating are effectively reduced.

[0044] The pressure of the elastic pressure wheel 42 can also make the surface of the primer smoother and reduce depressions. When the topcoat is subsequently applied, even if the primer is heated or under pressure, the possibility of bubble generation is greatly reduced due to less solvent residue. The solvent vapor inside the primer can be prevented from expanding and forming bubbles when heated or under pressure. The primer is made to adhere to the enameled wire 6 more densely, reducing internal gaps and defects. The dense primer layer has a stronger resistance to external pressure and temperature changes, further reducing the risk of bubble generation.

[0045] In addition, the elastic pressure wheel 42 adjusts its position in real time according to the state of the primer on the enameled wire 6, thereby ensuring that uniform pressure is always applied during the entire coating process. The thickness of the enameled wire 6 is monitored by a sensor and the data is fed back to the control system, which finally issues a command to adjust the pressure of the elastic pressure wheel 42. The sensor is not shown in the figure.

[0046] See also Figure 3-Figure 8 and Fig.10 As shown, the front and rear ends of the heating sleeve 41 are respectively provided with an air inlet 411 and an air outlet 412 connected thereto, and a negative pressure path for air flow is formed between the air inlet 411 and the air outlet 412. When the air flow is in operation, the vapor volatilized from the solvent in the primer of the enameled wire 6 passing through the heating sleeve 41 is in a state of being rapidly discharged.

[0047] When the enameled wire 6 passes through the heating sleeve 41, the vapor generated by the volatilization of the solvent needs to be discharged in time to avoid its accumulation inside the heating sleeve 41, thereby affecting the coating quality. A low-pressure environment is generated at the air outlet 412 through an external air extraction device, so that air enters from the air inlet 411 and flows rapidly along the inside of the heating sleeve 41, and finally is discharged from the air outlet 412. The airflow operation state not only provides good ventilation conditions for the inside of the heating sleeve 41, but also can effectively take away the solvent vapor volatilized in the primer on the surface of the enameled wire 6.

[0048] Specifically, when the enameled wire 6 enters the heating sleeve 41, the temperature of the heating sleeve 41 will accelerate the volatilization of the solvent in the primer, forming a large amount of steam. If the steam cannot be discharged in time, it may re-condense on the surface of the enameled wire 6 or the inner wall of the heating sleeve 41, resulting in a decrease in coating quality and even new bubble problems. After the fresh air introduced through the air inlet 411 mixes with the solvent vapor, it quickly flows to the air outlet 412 under the action of negative pressure. Ensure that the solvent vapor can be completely taken away from the heating sleeve 41 without being retained inside.

[0049] See also Figure 8 As shown, the opening on the heating sleeve 41 is provided with a sealing gasket 43 that can adapt to the elastic pressure wheel 42, and a supporting structure 5 is provided at both ends of the heating sleeve 41. The supporting structure 5 is specifically an air cushion arranged around the enameled wire 6. When the enameled wire 6 passes through the heating sleeve 41, a sealed space is formed inside the heating sleeve 41.

[0050] The air cushion has the function of scraping off excess primer, thereby improving the flatness and uniformity of the primer surface.

[0051] When the enameled wire 6 passes through the heating sleeve 41, the elastic pressure wheel 42 applies pressure to the enameled wire 6 through the opening. The sealing gasket 43 simultaneously maintains the airtightness inside the heating sleeve 41, effectively preventing the external air with impurities from entering the interior of the heating sleeve 41.

[0052] At the same time, when the enameled wire 6 passes through the heating sleeve 41, the air cushion will have a slight contact with the surface of the enameled wire 6, and the air cushion will be used to scrape off the excess primer from the surface of the enameled wire 6. The flatness and uniformity of the primer coating are improved, and the bubble problem or defect caused by the excessive thickness of the primer is reduced. In addition, it also effectively avoids direct contact between the enameled wire 6 and hard parts, thereby reducing the risk of surface scratches and protecting the integrity of the enameled wire 6.

[0053] See also Figure 3 , Figure 7 and Figure 8 As shown, a shell 11 is provided at the position corresponding to each elastic pressure wheel 42 on the bracket 1, and the elastic pressure wheel 42 is rotatably set on the shell 11. A drainage channel 111 is provided at the position of each shell 11 opposite to the elastic pressure wheel 42 to guide the gas to impact the surface of the elastic pressure wheel 42 to achieve a cleaning effect. The surface of the elastic pressure wheel 42 has a flexible layer 421.

[0054] The bracket 1 is provided with a driver for driving the two housings 11 to move relative to each other, and the driver is not shown in the figure.

[0055] When the enameled wire 6 passes through the elastic pressure wheel 42, the primer may partially remain on the surface of the elastic pressure wheel 42 due to extrusion. If these residues are not cleaned in time, it will not only affect the pressure control accuracy of the elastic pressure wheel 42 on the enameled wire 6, but also may cause uneven primer coating. To this end, the drainage channel 111 ensures that the direction and speed of the airflow can achieve the best cleaning effect.

[0056] When the gas is ejected at high speed onto the surface of the elastic pressure wheel 42 through the drainage channel 111, the impact force can quickly peel off the attached primer residue. In addition, since the surface of the elastic pressure wheel 42 is covered with the flexible layer 421, the contact performance between the elastic pressure wheel 42 and the enameled wire 6 is enhanced, preventing the enameled wire 6 from being scratched by the hard surface.

[0057] See also Figure 7 , Figure 8 and Fig.10 As shown, an air inlet 411 and an air outlet 412 are provided on the heating sleeve 41 and on both sides of each drainage channel 111, and an air inlet pipe 4111 and an air outlet pipe 4121 connected to each air inlet 411 and air outlet 412 are respectively provided on the outer shell 11, and a branch pipe 112 is connected between each air inlet pipe 4111 and the corresponding drainage channel 111.

[0058] A hose 4113 is connected between each air inlet pipe 4111 and the corresponding air inlet port 411, and between each air outlet pipe 4121 and the corresponding air outlet port 412. When the position of the elastic pressure wheel 42 needs to be adjusted to accommodate enameled wires 6 of different specifications, each air inlet pipe 4111 and each air outlet pipe 4121 moves relative to the heating sleeve 41 following the outer shell 11. The hose 4113 ensures the connection while avoiding airflow leakage, so that the heating sleeve 41 has an effective negative pressure environment.

[0059] At the same time, when the airflow enters the heating sleeve 41 from the air inlet pipe 4111, part of the airflow is introduced into the drainage channel 111 through the branch pipe 112, which can not only realize automatic cleaning of the surface of the elastic pressure wheel 42, but also reduce the pressure control error caused by impurity accumulation.

[0060] The provision of the branch pipe 112 allows the intake air flow to be reasonably distributed to different functional areas, which not only meets the demand for providing fresh air to the inside of the heating sleeve 41, but also provides a dedicated air flow for cleaning the elastic pressure wheel 42, thereby significantly improving the air flow utilization efficiency.

[0061] See also Figure 5-Figure 8 As shown, each air inlet pipe 4111 is provided with a heating layer 4112 for achieving a heating effect so that the airflow entering the heating sleeve 41 is hot air.

[0062] When the airflow passes through the air inlet pipe 4111, the heating layer 4112 starts to work and uses its heating performance to heat the airflow, so that the airflow temperature at normal temperature is significantly increased, so that it has a higher thermal energy before entering the heating sleeve 41. When these hot airflows enter the heating sleeve 41 and contact the primer coating on the surface of the enameled wire 6, the volatilization of the solvent in the primer can be accelerated more quickly.

[0063] By precisely controlling the temperature of the heating layer 4112, the degree of heating of the airflow can be adjusted for different types of primers, thereby achieving a more flexible and efficient coating process. This not only improves the efficiency of solvent volatilization, but also enhances the overall heat treatment capacity of the heating sleeve 41, ensuring that the primer coating on the surface of the enameled wire 6 can reach an ideal state in a short time, reducing the generation of solvent residues and bubble problems during subsequent topcoat coating.

[0064] See also Figure 1-Figure 4 As shown, the primer coating mechanism 2 and the topcoat coating mechanism 3 respectively have two coating rollers 21 for clamping the enameled wire 6 therein, each coating roller 21 is surrounded by the felt layer 22, and each coating roller 21 is rotatably disposed on the outer shell 11. When the felt layer 22 on the coating roller 21 contacts the enameled wire 6, the flexible layer 421 on the elastic pressure wheel 42 is in contact with the enameled wire 6 at the same time.

[0065] The coating rollers 21 of the primer coating mechanism 2 and the topcoat coating mechanism 3 respectively have through holes 211 through which the primer and topcoat can be blended into the felt layer 22 .

[0066] During the coating process of the enameled wire 6, the primer coating mechanism 2 and the topcoat coating mechanism 3 respectively realize uniform coating treatment of the enameled wire 6 through two coating rollers 21. When the enameled wire 6 is conveyed between the two coating rollers 21, the coating roller 21 firmly clamps the enameled wire 6 in its felt layer 22. As the enameled wire 6 is conveyed, the coating roller 21 rotates, and the paint liquid in the felt layer 22 is uniformly attached to the surface of the enameled wire 6 through the rotation of the coating roller 21.

[0067] At the same time, the flexible layer 421 on the elastic pressure wheel 42 also contacts the enameled wire 6 synchronously, which not only assists in applying appropriate pressure to ensure uniform coating thickness, but also further compacts the primer, causing the paint liquid to adhere more closely to the surface of the enameled wire 6.

[0068] See also Figure 1-Figure 4 As shown, the coating roller 21 of the primer coating mechanism 2 has a roller shaft 422 rotatably disposed on the outer shell 11, and the elastic pressure wheel 42 has a pressure wheel shaft 423 rotatably disposed on the outer shell 11. A synchronous belt 424 is provided between the roller shaft 422 and the pressure wheel shaft 423 on each outer shell 11.

[0069] When the enameled wire 6 drives the two coating rollers 21 to rotate during the conveying process, the elastic pressure wheel 42 is in a synchronous rotation state due to the action of the synchronous belt 424, so that the elastic pressure wheel 42 can be impacted by the airflow all around and can be effectively cleaned.

[0070] When the enameled wire 6 passes through the coating roller 21 driven by the conveying mechanism, the two coating rollers 21 are driven to rotate, and this rotational motion is transmitted to the pressure roller shaft 423 of the elastic pressure roller 42 through the synchronous belt 424, so that the elastic pressure roller 42 also rotates synchronously. It is ensured that the elastic pressure roller 42 can fully contact the enameled wire 6 during the entire working process, and the flexible layer 421 on its surface always maintains a uniform pressure distribution.

[0071] Since the elastic pressure wheel 42 is in a continuous rotating state, its entire periphery can be sequentially exposed to the airflow impact range guided by the drainage channel 111, thereby achieving all-round effective cleaning and avoiding contamination problems on the surface of the elastic pressure wheel 42 caused by primer residues.

[0072] A uniform coating process for primer and topcoat of enameled wire, applied to the uniform coating device for primer and topcoat of enameled wire described above, comprises the following steps: S1, the enameled wire 6 is sent to the primer coating mechanism 2 through the conveying mechanism to complete the primer coating; S2, the enameled wire 6 after being coated with primer enters the heating sleeve 41 of the defoaming component 4 to accelerate the volatilization of the solvent in the primer; S3, the enameled wire 6 treated by the defoaming assembly 4 enters the topcoat coating mechanism 3 to complete the topcoat coating.

[0073] The present invention applies uniform pressure to the enameled wire 6 through the elastic pressure wheel 42, and combines the heating effect of the heated airflow entering the heating sleeve 41 on the primer, thereby achieving compaction of the primer coating, accelerated solvent volatilization and effective reduction of bubble residues, thereby improving the primer adhesion quality and overall coating performance.

[0074] Effectively and timely discharge of solvent vapor can avoid vapor condensation leading to coating problems and the generation of bubbles during subsequent topcoat coating, ensuring a stable and efficient coating process and improving the coating effect and stability of the primer and topcoat of the enameled wire 6.

[0075] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A device for uniformly coating primer and topcoat of enameled wire, comprising a support (1) and a conveying mechanism arranged on the support (1) for conveying the enameled wire (6), the support (1) also being provided with a primer coating mechanism (2) and a topcoat coating mechanism (3) arranged in sequence along the conveying direction of the enameled wire (6), the primer coating mechanism (2) and the topcoat coating mechanism (3) both having a felt layer (22) for wrapping the enameled wire (6); It is characterized in that A debubbling assembly (4) is provided between the primer coating mechanism (2) and the topcoat coating mechanism (3), the debubbling assembly (4) comprising a heating sleeve (41) arranged on the support (1) for the enameled wire (6) to pass through, the inner diameter of the heating sleeve (41) being larger than the diameter of the enameled wire (6), and when the heating sleeve (41) is in the working state, the solvent in the primer on the surface of the enameled wire (6) is accelerated to volatilize; The heating sleeve (41) is provided with a support structure (5) for keeping the enameled wire (6) and the heating sleeve (41) coaxial.

2. A uniform coating device for primer and topcoat of enameled wire according to claim 1, characterized in that: The defoaming assembly (4) further comprises elastic pressure wheels (42) symmetrically arranged on the upper and lower sides of the heating sleeve (41); the two elastic pressure wheels (42) are both movable along an axial direction perpendicular to the heating sleeve (41); the heating sleeve (41) is provided with an opening for the elastic pressure wheels (42) to pass through; when the two elastic pressure wheels (42) squeeze the enameled wire (6), the primer is in a compacted state so that the solvent therein migrates to the surface.

3. The uniform coating device for primer and topcoat of enameled wire according to claim 2, characterized in that: The front end and the rear end of the heating sleeve (41) are respectively provided with an air inlet (411) and an air outlet (412) which are in communication therewith, and a negative pressure path for air flow is formed between the air inlet (411) and the air outlet (412). When the air flow is in operation, steam volatilized from the solvent in a portion of the primer of the enameled wire (6) passing through the heating sleeve (41) is in a state of being rapidly discharged.

4. The uniform coating device for primer and topcoat of enameled wire according to claim 3, characterized in that: The opening on the heating sleeve (41) is provided with a sealing gasket (43) capable of adapting to the elastic pressure wheel (42), and a supporting structure (5) is provided at both ends of the heating sleeve (41). The supporting structure (5) is specifically an air cushion arranged around the enameled wire (6). When the enameled wire (6) passes through the heating sleeve (41), a sealed space is formed inside the heating sleeve (41).

5. The uniform coating device for primer and topcoat of enameled wire according to claim 3, characterized in that: A housing (11) is provided at a position corresponding to each elastic pressure wheel (42) on the bracket (1), and the elastic pressure wheel (42) is rotatably arranged on the housing (11). A drainage channel (111) is provided at a position on each housing (11) directly opposite to the elastic pressure wheel (42) for guiding gas to impact the surface of the elastic pressure wheel (42) to achieve a cleaning effect, and the surface of the elastic pressure wheel (42) has a flexible layer (421).

6. The uniform coating device for primer and topcoat of enameled wire according to claim 5, characterized in that: An air inlet (411) and an air outlet (412) are provided on the heating sleeve (41) and located on both sides of each drainage channel (111); an air inlet pipe (4111) and an air outlet pipe (4121) are provided on the outer shell (11) and are connected to each air inlet (411) and air outlet (412); and a branch pipe (112) is connected between each air inlet pipe (4111) and the corresponding drainage channel (111).

7. The uniform coating device for primer and topcoat of enameled wire according to claim 6, characterized in that: Each air inlet pipe (4111) is provided with a heating layer (4112) for achieving a heating effect so that the airflow entering the heating sleeve (41) is hot air.

8. The uniform coating device for primer and topcoat of enameled wire according to claim 5, characterized in that: The primer coating mechanism (2) and the topcoat coating mechanism (3) respectively have two coating rollers (21) for clamping the enameled wire (6) therein, each coating roller (21) is provided with the felt layer (22) surrounding it, and each coating roller (21) is rotatably arranged on the housing (11), and when the felt layer (22) on the coating roller (21) contacts the enameled wire (6), the flexible layer (421) on the elastic pressure wheel (42) is in a state of contacting the enameled wire (6) at the same time.

9. The uniform coating device for primer and topcoat of enameled wire according to claim 8, characterized in that: The coating roller (21) of the primer coating mechanism (2) has a roller rotating shaft (422) rotatably arranged on the outer shell (11), and the elastic pressure wheel (42) has a pressure wheel rotating shaft (423) rotatably arranged on the outer shell (11). A synchronous belt (424) is provided between the roller rotating shaft (422) and the pressure wheel rotating shaft (423) on each outer shell (11).

10. A uniform coating process for primer and topcoat of enameled wire, applied to a uniform coating device for primer and topcoat of enameled wire as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, the enameled wire (6) is sent to the primer coating mechanism (2) through the conveying mechanism to complete the primer coating; S2, the enameled wire (6) after being coated with primer enters the heating sleeve (41) of the defoaming component (4) to accelerate the volatilization of the solvent in the primer; S3. The enameled wire (6) treated by the defoaming component (4) enters the topcoat coating mechanism (3) to complete the topcoat coating.

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