Constant-temperature defoaming device for PI paint

Abstract

The utility model relates to a PI (Polyimide) paint constant-temperature defoaming device which is characterized in that a sealing barrel cover can be opened and closed and is connected with a barrel body, the side wall of the barrel body is a double-layer wall body with a temperature control cavity, and a liquid inlet and a liquid outlet are formed in the double-layer wall body; a feeding hole, a temperature measuring hole, a stirring hole and an exhaust hole are formed in the sealing barrel cover, the outer side of the feeding hole is connected with a feeding mechanism, a temperature measuring rod is inserted into the temperature measuring hole, a stirring rod is inserted into the vertical stirring hole, and the top end of the stirring rod is connected with a motor; the feeding mechanism comprises a feeding pipe and a preheating ring sleeve, a protective sleeve piece is outwards arranged at the joint of the feeding port and the feeding pipe, the protective sleeve piece comprises a vertical plate and a supporting ring plate, a heating cavity is defined by the feeding pipe, the vertical plate and the supporting ring plate, and the heating rod sequentially penetrates through a first inserting hole and a second inserting hole to stretch into the heating cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of flat wire painting production lines, and particularly relates to a PI paint constant temperature defoaming device. Background Technique

[0002] The development status of new energy vehicles is currently worthy of great attention. Globally, the sales volume and technological development of new energy vehicles (including electric vehicles and hybrid vehicles) continue to grow. In terms of the selection of power wires, new energy vehicles usually use high-voltage flat wires as the main power transmission lines for electric vehicles. These flat wires are usually composed of specially designed high-voltage cables. The flat wires can effectively meet the requirements of high-voltage power transmission, and are used to connect battery packs, electric motors, and other key electrical components. Compared with traditional round cables, flat wires can provide a larger cross-sectional area for electrical conduction within a limited space, have a larger surface area, and dissipate heat faster, ensuring the efficient transmission and safe operation of electrical energy.

[0003] The patent with the application number CN202111372601.1 discloses a painting box for enameled wires, which includes a box body, a box cover is arranged on the box body, and the rear side of the box cover is rotatably installed on the top of the box body through a hinge; U-shaped through holes are arranged at the top of both sides of the box body, a guide wheel is arranged in the box body near the U-shaped through holes, and both ends of the guide wheel are rotatably installed on the front and rear sides of the box body respectively; a roller is arranged between the two guide wheels, the roller is rotatably installed at the bottom end of a connecting shaft, and the top end of the connecting shaft is fixedly installed on the box cover; a circular scraper is also arranged at one of the U-shaped through holes; the guide wheel is arranged above the liquid level in the box body, the bottom surface of the roller is arranged below the liquid level in the box body, and the copper wire can pass through the other U-shaped through hole, bypass the upper part of one guide wheel, the lower part of the roller, and the upper part of the other guide wheel in sequence, and then pass through the circular scraper. However, during the whole process, the flat wire transfers the heat it carries to the paint, causing the temperature of the paint to gradually rise. And the paint used in the paint box is stored in a cold storage. During the process from freezing to the painting area of the equipment, the change in the temperature of the paint is too large, and foam is easily generated during the paint supply process, which affects the uneven painting, resulting in product eccentricity and affecting the performance. Content of the Utility Model

[0004] Aiming at the deficiencies existing in the above-mentioned prior art, the purpose of the present utility model is to provide a PI paint constant temperature defoaming device.

[0005] To achieve the above purpose, the present utility model provides the following technical solutions:

[0006] A PI paint constant temperature defoaming device includes a cylinder body and a sealed barrel cover. The sealed barrel cover is connected to the cylinder body in an openable and closable manner. The side wall of the cylinder body is a double-layer wall body with a temperature control cavity. An inlet and an outlet are arranged on the double-layer wall body, and the inlet and the outlet are respectively connected to an industrial chiller;

[0007] The sealing barrel cover is provided with a feeding port, a temperature measuring port, a stirring port and an exhaust port. The outside of the feeding port is connected to a feeding mechanism. A temperature measuring rod is inserted into the temperature measuring port, and a stirring rod is inserted into the stirring port. The top end of the stirring rod is connected to a motor;

[0008] The feeding mechanism includes a feeding pipe and a preheating ring sleeve. The preheating ring sleeve is arranged at the connection between the feeding port and the feeding pipe. The preheating ring sleeve includes a vertical plate and a supporting ring plate. The feeding pipe, the vertical plate and the supporting ring plate enclose a heating cavity. The inner side of the supporting ring plate is connected to the feeding pipe, the outer side of the supporting ring plate is connected to the vertical plate. The supporting ring plate is provided with a first insertion hole. An installation ring is sleeved at the connection between the feeding pipe and the supporting ring plate. A second insertion hole adapted to the first insertion hole is provided on the installation ring. A heating rod sequentially passes through the first insertion hole and the second insertion hole and extends into the heating cavity;

[0009] An antifoaming component is sleeved on the stirring rod, and a stirring blade is provided at the end of the stirring rod.

[0010] As a preference of the present utility model, the antifoaming component includes a connecting sleeve, a connecting arm and an antifoaming plate. The connecting sleeve is sleeved on the stirring rod. The connecting arms are obliquely arranged on the outer periphery of the connecting sleeve in a circumferential array. At least one of the connecting arms is recessed at the relatively far end from the stirring rod to form a connecting groove. One end of a connecting piece is connected to the connecting groove, and the other end of the connecting piece is connected to the antifoaming plate.

[0011] As a preference of the present utility model, the stirring rod is recessed with vertical guiding grooves. The guiding grooves are arranged on the stirring rod in a circumferential array. Insertion protruding strips are circumferentially arrayed on the inner side of the connecting sleeve corresponding to the guiding grooves. The insertion protruding strips are connected to the guiding grooves.

[0012] As a preference of the present utility model, the antifoaming plate is a hollow plate. A limiting ring sleeve is fixedly connected to the stirring rod. The limiting ring sleeves are provided to limit the antifoaming component above and below.

[0013] As a preference of the present utility model, a floating plate with a width greater than that of the antifoaming plate is provided on the bottom surface of the antifoaming plate.

[0014] As a preference of the present utility model, antifoaming needles are protruded on the side surface of the antifoaming plate.

[0015] As a preference of the present utility model, a stirring side arm is connected below the lowermost limiting ring sleeve of the stirring rod. The stirring side arm includes a cross bar and a vertical bar which are connected to each other. The cross bar is connected to the stirring rod.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] An inlet mechanism for preheating the input polyimide varnish is added at the inlet of the sealed barrel cover. A heating chamber is formed by the inlet pipe, the vertical plate, and the support ring plate. The heating rod inserted on the preheating ring sleeve 14 works, so that the polyimide varnish receives heat from the heating chamber when passing through the inlet pipe, and the low-temperature polyimide varnish is heated before entering the cylinder body. By controlling the step-by-step temperature rise of the polyimide varnish in stages when entering the cylinder body and during the stirring process in the cylinder body, it is avoided that the polyimide varnish stored in the cold storage directly enters the cylinder body and the temperature suddenly rises, resulting in a large number of bubbles.

[0018] The cylinder body is designed and optimized to be a double-layer wall body with a temperature control chamber, which cooperates with the temperature measuring rod to monitor the temperature of the polyimide varnish in real time. An industrial chiller is externally connected. According to the ambient temperature (cooling in summer and heating in winter), the required temperature is set. By inputting a liquid with a suitable temperature into the temperature control chamber, heat exchange is carried out on the polyimide varnish to ensure that the temperature of the paint entering the painting area reaches the required value, thereby defoaming and controlling the temperature of the paint.

[0019] A defoaming component is designed to further eliminate the bubbles generated by stirring. Description of the Drawings

[0020] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes, and advantages of the present utility model will become more obvious:

[0021] Figure 1 is a schematic diagram of the external structure of the present utility model;

[0022] Figure 2 is a top view of the present utility model;

[0023] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in

[0024] Figure 4 is a partial schematic diagram of the present utility model;

[0025] Figure 5 is a partial schematic diagram of the inlet mechanism of the present utility model.

[0026] Wherein:

[0027] 1. Cylinder body, 2. Sealed barrel cover, 3. Liquid inlet, 4. Liquid outlet, 5. Feeding port, 6. Temperature measuring port, 7. Stirring port, 8. Exhaust port, 9. Feeding mechanism, 10. Temperature measuring rod, 11. Stirring rod, 12. Motor, 13. Feeding pipe, 14. Preheating ring sleeve, 15. Discharge port, 16. Vertical plate, 17. Support ring plate, 18. First jack, 19. Installation ring, 20. Second jack, 21. Heating rod, 22. Stirring blade, 23. Connecting sleeve, 24. Connecting arm, 25. Defoaming plate, 26. Connecting groove, 27. Connector, 28. Guide groove, 29. Inserted protruding strip, 30. Limiting ring sleeve, 31. Floating plate, 32. Defoaming needle, 33. Stirring side arm, 34. Cross bar, 35. Vertical bar, 100. Temperature control cavity, 200. Heating cavity. Detailed implementation mode

[0028] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with the specific implementation modes.

[0029] PI paint generally refers to the paint made of polyimide (abbreviation: PI). It is a high-performance engineering plastic with excellent heat resistance, mechanical properties and chemical stability. Polyimide coatings can be applied in multiple fields, including being used as insulating paint for electromagnetic wires or as high-temperature resistant coatings. In addition, polyimide varnish is a solution of polyimide or polyimide precursor dissolved in organic solvents, and forms a polyimide coating film on the substrate through heat treatment, which is mainly applied in aspects such as flexible displays and material applications with high heat resistance requirements.

[0030] In the production of enameled wires, controlling the temperature of the polyimide varnish in the paint tank can affect the generation and elimination of bubbles in the enameled layer. Usually, a higher temperature helps to reduce the bubbles in the paint because heat helps the bubbles to be released from the paint. However, the temperature setting needs to be optimized within a certain range to avoid other quality problems caused by overheating of the paint, such as the rapid evaporation of the organic solvent in the polyimide varnish, resulting in poor fluidity or uneven drying of the enameled layer formed after the polyimide coating is applied.

[0031] Specifically for the temperature range for controlling the bubbles in the paint, it is generally recommended to adjust between 50°C and 70°C. The temperature within this range can usually effectively prompt the bubbles in the paint to be gradually released through thermal action, improving the density and uniformity of the enameled layer.

[0032] Refer to the attached Figure 1 to the attached Figure 5As shown, a constant-temperature defoaming device for PI paint, characterized by comprising a cylinder body 1 and a sealed barrel cover 2. The sealed barrel cover 2 is connected to the cylinder body 1 in an openable and closable manner. The side wall of the cylinder body 1 is a double-layer wall body with a temperature control cavity 100. An inlet 3 and an outlet 4 are provided on the double-layer wall body. The inlet 3 and the outlet 4 are respectively connected to an industrial chiller (not shown in the figure). The industrial chiller is prior art. The industrial chiller in the present invention is an industrial chiller that can both refrigerate and heat. According to different application requirements, the chiller unit can be designed with water, ethylene glycol or silicone oil as the carrier to achieve the refrigeration and heating functions in the temperature range from -80 degrees to 200 degrees.

[0033] An inlet 5, a temperature measuring port 6, a stirring port 7 and an exhaust port 8 are provided on the sealed barrel cover 2. The gas generated by eliminating bubbles is discharged outside the cylinder body 1 through the exhaust port 8. The outside of the inlet 5 is connected to a feeding mechanism 9. A temperature measuring rod 10 is inserted into the temperature measuring port 6, and the temperature measuring rod 10 extends below the liquid level. A liquid level detection device is correspondingly arranged inside the cylinder body 1. When the liquid level detected by the liquid level detection device is lower than the lowest liquid level height of the paint liquid, an alarm is given to remind the staff to supplement the polyimide varnish in time. A stirring rod 11 is inserted into the stirring port 7, and the top end of the stirring rod 11 is connected to a motor 12.

[0034] The feeding mechanism 9 includes a feeding pipe 13 and a preheating ring sleeve 14. The preheating ring sleeve 14 is arranged at the connection between the inlet 5 and the feeding pipe 13. The preheating ring sleeve 14 includes a vertical plate 16 and a supporting ring plate 17. The feeding pipe 13, the vertical plate 16 and the supporting ring plate 17 enclose a heating cavity 200. Since the polyimide varnish may have component precipitation or stratification during storage, stirring helps to remix the paint evenly. However, if the polyimide varnish is not properly preheated before stirring, low temperature may increase the viscosity of the paint, thus increasing the generation of bubbles. The inner side of the supporting ring plate 17 is connected to the feeding pipe 13, the outer side of the supporting ring plate 17 is connected to the vertical plate 16. A first jack 18 is provided on the supporting ring plate 17. An installation ring 19 is sleeved at the connection between the feeding pipe 13 and the supporting ring plate 17. A second jack 20 is provided on the installation ring 19 to match the first jack 18. A heating rod 21 sequentially passes through the first jack 18 and the second jack 20 and extends into the heating cavity 200.

[0035] A defoaming component is sleeved on the stirring rod 11 to further eliminate the bubbles generated by the stirring of the polyimide varnish. A stirring blade 22 is provided at the end of the stirring rod 11.

[0036] The defoaming component includes a connecting sleeve 23, a connecting arm 24 and a defoaming plate 25. The connecting sleeve 23 is sleeved on the stirring rod 11. The connecting arms 24 are obliquely arranged on the outer periphery of the connecting sleeve 23 in a circumferential array. At least one connecting arm 24 is recessed at the farther end from the stirring rod 11 to be provided with a connecting groove 26. One end of the connecting groove 26 is connected to one end of the connecting piece 27. Specifically, it is axially connected through a connecting shaft. The connecting piece 27 can make a circular motion around the connecting shaft relative to the connecting arm 24. The other end of the connecting piece 27 is connected to the defoaming plate 25.

[0037] The stirring rod 11 is recessed to be provided with a vertical guiding groove 28. The guiding grooves 28 are arranged on the stirring rod 11 in a circumferential array. Corresponding to the guiding grooves 28, insertion protruding strips 29 are arranged in a circumferential array on the inner side of the connecting sleeve 23. The insertion protruding strips 29 are connected to the guiding grooves 28. This ensures that the connecting sleeve 23 cannot rotate axially with respect to the stirring rod 11. When defoaming work is carried out, the connecting sleeve 23 and the connecting arms 24 rotate around the axis following the stirring rod 11. The defoaming plate 25 can move up and down relative to the stirring rod 11 under the buoyancy action of the polyimide varnish, and at the same time rotates and scrapes the liquid surface following the stirring rod 11 for defoaming.

[0038] The defoaming plate 25 is a hollow plate. By setting the defoaming plate 25 to be of a hollow material, the overall mass is reduced to generate a large buoyancy, ensuring that the defoaming component always floats on the liquid surface of the polyimide varnish. A limiting ring sleeve 30 is fixedly connected to the stirring rod 11. Limiting ring sleeves 30 are provided above and below the defoaming component for limiting, and its up and down movement is limited by the limiting ring sleeve 30.

[0039] The bottom surface of the defoaming plate 25 is provided with a floating plate 31 whose width is greater than that of the defoaming plate 25.

[0040] The side surface of the defoaming plate 25 protrudes to be provided with defoaming needles 32. The defoaming needles 32 pierce the bubbles generated during the stirring of the polyimide varnish, further reducing the bubbles generated by the PI paint in the cylinder 1.

[0041] The stirring rod 11 is connected to a stirring side arm 33 below the lowermost limiting ring sleeve 30. The stirring side arm 33 includes a cross bar 34 and a vertical bar 35 which are connected to each other. The cross bar 34 is connected to the stirring rod 11.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A PI paint constant temperature defoaming device, characterized in that, It includes a cylinder body (1) and a sealed barrel cover (2). The sealed barrel cover (2) is connected to the cylinder body (1) in an openable and closable manner. The side wall of the cylinder body (1) is a double-layer wall body with a temperature control cavity (100). An inlet (3) and an outlet (4) are provided on the double-layer wall body, and the inlet (3) and the outlet (4) are respectively connected to an industrial chiller. An inlet (5), a temperature measuring port (6), a stirring port (7) and an exhaust port (8) are provided on the sealed barrel cover (2). The outside of the inlet (5) is connected to a feeding mechanism (9). A temperature measuring rod (10) is inserted into the temperature measuring port (6), a stirring rod (11) is inserted into the stirring port (7), and the top end of the stirring rod (11) is connected to a motor (12). The feeding mechanism (9) includes a feeding pipe (13) and a preheating ring sleeve (14). The preheating ring sleeve (14) is arranged at the connection between the inlet (5) and the feeding pipe (13). The preheating ring sleeve (14) includes a vertical plate (16) and a supporting ring plate (17). The feeding pipe (13), the vertical plate (16) and the supporting ring plate (17) enclose a heating cavity (200). The inner side of the supporting ring plate (17) is connected to the feeding pipe (13), the outer side of the supporting ring plate (17) is connected to the vertical plate (16), a first insertion hole (18) is formed on the supporting ring plate (17), an installation ring (19) is sleeved at the connection between the feeding pipe (13) and the supporting ring plate (17), and a second insertion hole (20) adapted to the first insertion hole (18) is provided on the installation ring (19). A heating rod (21) sequentially passes through the first insertion hole (18) and the second insertion hole (20) and extends into the heating cavity (200). An anti-foaming component is sleeved on the stirring rod (11), and a stirring blade (22) is provided at the end of the stirring rod (11).

2. The PI paint constant temperature defoaming device according to claim 1, wherein, The anti-foaming component includes a connecting sleeve (23), a connecting arm (24) and an anti-foaming plate (25). The connecting sleeve (23) is sleeved on the stirring rod (11). The connecting arms (24) are obliquely arranged in a circumferential array on the outer periphery of the connecting sleeve (23). At least one connecting arm (24) is recessed at the farther end from the stirring rod (11) to be provided with a connecting groove (26). One end of a connecting piece (27) is connected to the connecting groove (26), and the other end of the connecting piece (27) is connected to the anti-foaming plate (25).

3. The PI paint constant temperature defoaming device according to claim 2, wherein, Vertically-oriented guiding grooves (28) are recessed on the stirring rod (11). The guiding grooves (28) are arranged in a circumferential array on the stirring rod (11). Insertion protruding strips (29) are circumferentially arrayed on the inner side of the connecting sleeve (23) corresponding to the guiding grooves (28), and the insertion protruding strips (29) are connected to the guiding grooves (28).

4. The PI paint constant-temperature defoaming device according to claim 3, wherein, The anti-foaming plate (25) is a hollow plate. A limiting ring sleeve (30) is fixedly connected to the stirring rod (11). The anti-foaming component is limited by the limiting ring sleeves (30) both above and below.

5. The PI paint constant temperature defoaming device according to claim 3, characterized in that, A floating plate (31) with a width greater than that of the anti-foaming plate (25) is provided on the bottom surface of the anti-foaming plate (25).

6. The PI paint constant temperature defoaming device according to claim 3, characterized in that, The side of the defoaming plate (25) is convexly provided with defoaming needles (32).

7. The PI paint constant-temperature defoaming device according to claim 4, wherein The stirring rod (11) is connected with a stirring side arm (33) below the lowermost limiting ring sleeve (30). The stirring side arm (33) includes a cross bar (34) and a vertical bar (35) which are connected to each other. The cross bar (34) is connected with the stirring rod (11).

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