A coating replenishment device

Abstract

This utility model discloses a coating replenishment device, relating to the technical field of coating and encapsulation equipment. It includes an operating table and a connecting line, with a thermistor fixedly connected to the bottom end of the connecting line. The thermistor is coated via a coating mechanism. By setting up a coating mechanism and adjusting the height of each coating tube opening to be consistent through processing and assembly precision, this utility model provides a uniformly high-height coating surface for multiple points due to the consistent height and shape of the naturally formed micro-convex surfaces after each liquid overflow. Furthermore, the naturally formed coating surface after each liquid overflow provides a coating surface with very high repeatability. Because the viscous coating liquid has a high surface tension, the coating tube cross-section is small, and the internal extrusion naturally repairs the micro-convex coating surface without the influence of external forces such as scrapers that introduce air, thus minimizing coating defects such as bubbles and dents, facilitating the coating of thermistors.

Description

Technical Field

[0001] This utility model relates to the field of coating and packaging equipment technology, specifically a coating liquid replenishment device. Background Technology

[0002] A thermistor is a resistor whose resistance is extremely sensitive to temperature. Also called a semiconductor thermistor, it can be made of single crystal, polycrystalline, or semiconductor materials such as glass and plastic. This type of resistor has a series of special electrical properties. The most basic characteristic is that its resistance changes significantly with temperature, and its current-voltage curve is non-linear. Within the operating temperature range, the resistance of a thermistor that increases with temperature is a positive temperature coefficient (PTC) thermistor; the resistance of a thermistor that decreases with temperature is a negative temperature coefficient (NTC) thermistor.

[0003] In the production of thermistors, epoxy resin coating is required. Existing coating methods use larger open containers based on the distribution area of ​​the coating points. The liquid level drops after each coating, requiring manual or automatic adjustment. Manual adjustment lacks precision, resulting in unstable coating dimensions, while automatic adjustment mechanisms are complex and difficult to adjust precisely. Before each coating, a scraper is needed to remove pits from the previous coating and level the liquid surface to improve coating accuracy. However, this process can trap a large amount of air, causing air bubbles, pits, and other coating defects. After a certain number of coatings, the liquid level needs to be adjusted frequently due to its drop. Both manual and automatic adjustments are difficult to control precisely, leading to unstable coating dimensions. Some multi-component coating liquids containing curing agents have a limited shelf life, and using large open containers results in significant waste of coating material. To facilitate the coating of thermistors, a coating liquid replenishment device is provided. Utility Model Content

[0004] The purpose of this invention is to provide a coating replenishment device to facilitate the coating of thermistors.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a coating replenishment device, comprising an operating table and a connecting line, wherein a thermistor is fixedly connected to the bottom end of the connecting line, and the thermistor performs coating operations through a coating mechanism.

[0006] The coating mechanism includes an overflow tank, which is fixedly connected to the top of the operating table. A connecting box is fixedly connected to the bottom of the operating table below the overflow tank. A coating pipe is fixedly connected to the top of the connecting box and extends into the inner cavity of the overflow tank.

[0007] As a further embodiment of this utility model: the coating mechanism further includes a vacuum degassing mixer, which is located on one side of the operating table. A connecting pipe is fixedly connected to the mixing tank of the vacuum degassing mixer, and a liquid pump is installed on the outer wall of the connecting pipe. The connecting pipe is connected to the connecting box, and the liquid pump is used to drive the coating liquid in the vacuum degassing mixer to enter the connecting box through the connecting pipe.

[0008] As a further improvement of this utility model, the coating tube is provided with a plurality of tubes that are equidistantly distributed in the inner cavity of the overflow tank.

[0009] As a further improvement of this utility model: the coating tube is hollow and is connected to the connecting box.

[0010] As a further improvement of this utility model, an adhesive plate is provided on the outer wall of the connecting line.

[0011] As a further improvement of this utility model, the outer wall of the adhesive plate is provided with multiple sets of adhesive grooves for the connecting wires to enter.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By setting up a coating mechanism and adjusting the height of each coating tube opening to be consistent through processing and assembly precision, the height and shape of the naturally formed micro-convex surface after each liquid overflow are consistent, providing a coating surface with a consistent height at multiple points. Since the coating surface is naturally formed each time the liquid overflows, a coating surface with very high repeatability can be provided. Due to the high surface tension of the viscous coating liquid, the small cross-section of the coating tube, and the ability to naturally repair the micro-convex coating surface by extrusion from the inside, and without the influence of external forces such as scrapers that draw in air, coating defects such as bubbles and dents can be minimized, making it easier to coat thermistors. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the adhesive plate of this utility model;

[0016] Figure 3 This is a cross-sectional view of the discharge pipe of this utility model;

[0017] Figure 4 This is a cross-sectional view of the overflow tank of this utility model.

[0018] In the diagram: 1. Operating table; 2. Adhesion plate; 3. Connecting wire; 4. Thermistor; 5. Coating mechanism; 501. Vacuum degassing mixer; 502. Connecting pipe; 503. Liquid pump; 504. Overflow tank; 505. Connecting box; 506. Coating pipe; 6. Adhesion tank. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4 In this embodiment of the present invention, a coating replenishment device includes an operating table 1 and a connecting line 3. A thermistor 4 is fixedly connected to the bottom end of the connecting line 3. The thermistor 4 performs coating operations through a coating mechanism 5. The coating mechanism 5 includes an overflow tank 504, which is fixedly connected to the top of the operating table 1. A connecting box 505 is fixedly connected to the bottom end of the operating table 1 below the overflow tank 504. A coating tube 506 is fixedly connected to the top of the connecting box 505. 6 extends into the inner cavity of the overflow tank 504. The coating mechanism 5 also includes a vacuum degassing mixer 501. The vacuum degassing mixer 501 is located on one side of the operating table 1. A connecting pipe 502 is fixedly connected to the mixing tank of the vacuum degassing mixer 501. A liquid pump 503 is installed on the outer wall of the connecting pipe 502. The connecting pipe 502 is connected to the connecting box 505. The liquid pump 503 is used to drive the coating liquid in the vacuum degassing mixer 501 to enter the connecting box 505 through the connecting pipe 502.

[0021] In this embodiment: the ingredients are injected into the mixing tank of the vacuum degassing mixer 501 through the injection pipe. The vacuum degassing mixer 501 stirs and degassses the ingredients to form a coating liquid. The liquid pump 503 is started, and the coating liquid is injected into the connecting box 505 through the connecting pipe 502. The prepared coating liquid is squeezed out into each coating tube 506 through the connecting box 505, and overflows appropriately into the overflow tank 504 to eliminate errors. When the coating tube 506 is in a full overflow state, the connecting line 3 is moved. The displacement of the connecting line 3 drives the thermistor 4 to move. The thermistor 4 moves into the coating tube 506 and then moves out, thereby completing the coating operation.

[0022] After adjusting the height of each coating tube 506 opening to be consistent through processing and assembly precision, the height and shape of the naturally formed micro-convex surface after each liquid overflow are consistent, providing a coating surface with consistent height at multiple points. Since the coating surface is naturally formed each time the liquid overflows, a coating surface with very high repeatability can be provided. Due to the high surface tension of the viscous coating liquid, the small cross-section of the coating tube 506, and the ability to naturally repair the micro-convex coating surface by internal extrusion, without the influence of external forces such as scrapers drawing in air, coating defects such as bubbles and depressions can be minimized. By calculating the service life of the coating liquid and adjusting the total capacity of the vacuum degassing mixer 501 and the coating tube 506, it is ensured that all the mixed coating liquid is used up within the service life of the coating liquid, eliminating the need for periodic replacement of the coating liquid and achieving continuous coating without time limitations. This minimizes the waste of coating materials and facilitates the coating of the thermistor 4.

[0023] Please refer to this carefully. Figures 1-4 The coating pipe 506 is provided with several equidistantly distributed cavities in the overflow tank 504. The coating pipe 506 is hollow and is connected to the connecting box 505.

[0024] In this embodiment: the coating liquid is injected into the connecting box 505 through the connecting pipe 502, and the prepared coating liquid is squeezed out into each coating pipe 506 through the connecting box 505, and overflows into the overflow tank 504 as appropriate to eliminate errors.

[0025] Please refer to this carefully. Figures 1-4 The outer wall of the connecting line 3 is provided with an adhesive plate 2, and the outer wall of the adhesive plate 2 has multiple sets of adhesive grooves 6 for the connecting line 3 to enter.

[0026] In this embodiment, multiple connecting wires 3 can be glued and fixed in the adhesive groove 6, so that the thermistors 4 at the bottom of each connecting wire 3 remain flush. Thus, the connecting wires 3 and the thermistors 4 can be moved by moving the adhesive plate 2, making it convenient to perform synchronous displacement operation on multiple thermistors 4.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A coating replenishment device, comprising an operating table (1) and a connecting line (3), wherein a thermistor (4) is fixedly connected to the bottom end of the connecting line (3), characterized in that, The thermistor (4) is coated by the coating mechanism (5). The coating mechanism (5) includes an overflow tank (504), which is fixedly connected to the top of the operating table (1). The bottom of the operating table (1) is located below the overflow tank (504) and a connecting box (505) is fixedly connected thereto. A coating tube (506) is fixedly connected to the top of the connecting box (505) and extends into the inner cavity of the overflow tank (504).

2. The coating replenishment device according to claim 1, characterized in that, The coating mechanism (5) also includes a vacuum degassing mixer (501), which is located on one side of the operating table (1). A connecting pipe (502) is fixedly connected to the mixing tank of the vacuum degassing mixer (501). A liquid pump (503) is installed on the outer wall of the connecting pipe (502). The connecting pipe (502) is connected to the connecting box (505). The liquid pump (503) is used to drive the coating liquid in the vacuum degassing mixer (501) to enter the connecting box (505) through the connecting pipe (502).

3. The coating replenishment device according to claim 1, characterized in that, The coating tube (506) is provided with a plurality of tubes that are equidistantly distributed in the inner cavity of the overflow tank (504).

4. The coating replenishment device according to claim 1, characterized in that, The coating tube (506) is hollow and is connected to the connecting box (505).

5. A coating replenishment device according to claim 1, characterized in that, An adhesive plate (2) is provided on the outer wall of the connecting line (3).

6. A coating replenishment device according to claim 5, characterized in that, The outer wall of the adhesive plate (2) has multiple sets of adhesive grooves (6) for the connecting line (3) to enter.

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