A heat treatment apparatus for post-coating

Abstract

This utility model discloses a heat treatment device for post-coating in the field of coating heat treatment technology. It includes a workpiece conveyor belt with a heat treatment mechanism mounted on top. The heat treatment mechanism includes a hydrophobic spraying assembly, with drying heating hoods on both sides of the hydrophobic spraying assembly. A heat insulation hood connects the two drying heating hoods, and blowers are installed at both ends of the drying heating hoods. This coating heat treatment device can perform preliminary drying treatment on the coated substrate workpiece, preheat the hydrophobic protective agent used to improve coating adhesion, and perform secondary heat drying treatment on the hydrophobic protective agent sprayed on the surface of the coated workpiece. This process avoids thermal stress concentration caused by excessive temperature difference between the substrate workpiece, the film layer, and the hydrophobic protective agent, enhances the structural stability of the film layer, reduces the probability of quality problems such as cracking and peeling, and improves the overall quality and yield of the coated workpiece.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment technology for coating, and in particular to a heat treatment device for post-coating heat treatment. Background Technology

[0002] Coating is a process that uses physical or chemical methods to form one or more thin films with specific functions on the surface of a material. This technology is often used to improve the physical, chemical, or optical properties of material surfaces, such as enhancing wear resistance, corrosion resistance, oxidation resistance, conductivity, or light transmittance. Common coating methods include physical vapor deposition (PVD), chemical vapor deposition (CVD), electroplating, and sputtering. Coating materials can be metals, alloys, oxides, nitrides, etc., and are suitable for various substrates such as glass, metals, plastics, and ceramics. Coating is widely used in electronics, optics, aerospace, automotive, medical devices, and decorative industries. By forming functional surface layers, it can significantly improve product performance and lifespan.

[0003] In the process of protecting coated workpieces, to ensure the stability of the film structure and the uniform adhesion of the protective agent, heat treatment is usually required on the coated layer and the protective agent sprayed onto it on the substrate surface. Currently, existing coating heat treatment equipment cannot use hot air to thermally dry the coated layer on the substrate surface, making it prone to uneven drying in subsequent protective treatments, affecting the quality and performance of the coated layer. Furthermore, it cannot preheat the protective agent used to assist in film formation. When the protective agent is sprayed onto the substrate with the coated layer, the temperature difference can easily lead to thermal stress concentration, thereby compromising the structural stability of the film and causing problems such as cracking and peeling. Therefore, its use has certain limitations.

[0004] Based on this, we propose a heat treatment apparatus for post-coating to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Therefore, the purpose of this utility model is to provide a heat treatment device for coating, which can solve the problems of existing coating heat treatment equipment being unable to dry the coating layer with hot air or preheat the protective reagent, resulting in thermal stress concentration, cracking or peeling of the coating layer and other structural instability.

[0007] To solve the above technical problems, this utility model provides a heat treatment device for coating, which adopts the following technical solution: it includes a workpiece conveyor belt, a heat treatment mechanism is installed on the top of the workpiece conveyor belt, the heat treatment mechanism includes a hydrophobic spraying assembly, drying heating hoods are arranged on both sides of the hydrophobic spraying assembly, and a heat insulation hood is connected between the two sets of drying heating hoods.

[0008] Both ends of the drying heating hood are equipped with blowers, and the two sides of the drying heating hood are connected to baffles by bidirectional spring hinges. The inner side of the drying heating hood is also provided with two sets of embedded slots.

[0009] The hydrophobic spraying assembly includes a hydrophobic spraying component, and two sets of air supply pipelines are connected between the hydrophobic spraying component and the blower.

[0010] Optionally, the hydrophobic spraying component includes an infusion pipeline, a heat exchanger is installed at the bottom of the infusion pipeline, a flow guide is installed at the bottom of the heat exchanger, a liquid pump is installed at the end of the infusion pipeline away from the heat exchanger, and a liquid pump is also connected to the end of the liquid pump away from the infusion pipeline.

[0011] Optionally, the heat exchanger has a heat exchange cavity inside, which is connected to two sets of gas pipelines. The heat exchange cavity is equipped with a spiral heat exchange tube, which is connected to the liquid pipeline and the flow guide.

[0012] Optionally, the heat insulation cover includes a cover body, and two sets of embedded clips are installed at both ends of the cover body. The embedded clips are matched with the embedded slot structure, and the embedded clips and the embedded slots are engaged by a snap-fit.

[0013] Optionally, the drying heating hood has a heating cavity inside, and resistance heaters are distributed inside the heating cavity.

[0014] Optionally, a fixed seat is installed on one side of the workpiece conveyor belt, and rollers are driven to both sides of the inner wall of the workpiece conveyor belt. The top of the rollers carries the coated workpiece, and a return groove is opened in the middle of the workpiece conveyor belt near the fixed seat. The return groove is connected to the liquid extraction pipeline.

[0015] In summary, this utility model has at least one of the following beneficial effects:

[0016] 1. The coating heat treatment device designed in this scheme forms a hot airflow inside the drying heating hood through the coordinated operation of a blower and a resistance heater. This hot airflow can blow onto the surface of the coated workpiece, performing preliminary heat drying treatment on the coating layer. This process can effectively remove moisture and solvents from the surface of the coating layer, achieving rapid drying. At the same time, the uniform distribution of the hot airflow ensures the uniformity of the coating drying, avoiding uneven stress caused by localized excessively fast or slow drying. This not only improves the adhesion between the coating layer and the substrate, but also enhances the stability and durability of the coating layer. Through preliminary heat drying treatment, the surface quality of the coated workpiece is significantly improved, laying a good foundation for subsequent processing steps.

[0017] 2. The coating heat treatment device designed in this scheme achieves the recycling of hot airflow by installing blowers with the same rotation direction at both ends of the drying heating hood. One blower blows air into the drying heating hood, while the other blower extracts the internal hot airflow. The extracted hot airflow is circulated to the heat exchanger through the air supply pipeline, which can perform heat exchange treatment on the spiral heat exchange tube. When the hydrophobic protective agent is transported inside the spiral heat exchange tube, it can be preheated. The preheated hydrophobic protective agent is evenly sprayed onto the surface of the coated workpiece through the guide hood, forming a uniform protective film. This process not only avoids thermal stress concentration caused by excessive temperature difference, but also improves the adhesion effect of the hydrophobic protective agent and enhances the waterproof performance of the film.

[0018] 3. The coating heat treatment device designed in this scheme realizes secondary heat drying treatment of the coated workpiece through the setting of the heat insulation cover. After the coated workpiece has undergone preliminary heat drying and hydrophobic protective agent spraying, when the workpiece continues to be conveyed by the workpiece conveyor belt and passes through the inside of the heat insulation cover at one end of the drying heating cover, the heat insulation cover can perform secondary heat drying treatment on the coated workpiece and the hydrophobic protective agent sprayed on its surface. This process further enhances the structural stability of the film layer and reduces the probability of quality problems such as cracking and peeling. At the same time, the secondary heat drying treatment can also ensure the tight bonding between the hydrophobic protective agent and the film layer, improving the overall protective effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2This is a schematic diagram of the gas pipeline structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the hydrophobic spraying component of this utility model;

[0023] Figure 4 This is a cross-sectional view of the heat exchanger of this utility model;

[0024] Figure 5 This is a schematic diagram of the cover structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the resistance heater structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the workpiece conveyor belt structure of this utility model.

[0027] Explanation of reference numerals in the attached drawings: 1. Workpiece conveyor belt; 2. Heat treatment mechanism; 3. Hydrophobic spray assembly; 4. Drying heating hood; 5. Heat insulation hood; 6. Blower; 7. Baffle; 8. Embedded slot; 9. Hydrophobic spray component; 10. Gas supply pipeline; 11. Liquid supply pipeline; 12. Heat exchanger; 13. Flow guide hood; 14. Liquid pump; 15. Liquid pumping pipeline; 16. Heat exchange cavity; 17. Spiral heat exchange tube; 18. Cover body; 19. Embedded plate; 20. Heating cavity; 21. Resistance heater; 22. Fixing base; 23. Roller; 24. Coated workpiece; 25. Return channel. Detailed Implementation

[0028] 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.

[0029] Example: Refer to Figures 1 to 7This utility model provides an embodiment of a heat treatment device for post-coating heat treatment, including a workpiece conveyor belt 1. A heat treatment mechanism 2 is installed on the top of the workpiece conveyor belt 1. The heat treatment mechanism 2 includes a hydrophobic spraying assembly 3. Drying heating hoods 4 are arranged on both sides of the hydrophobic spraying assembly 3. A heat insulation hood 5 is connected between the two sets of drying heating hoods 4. Blowers 6 are installed at both ends of the drying heating hoods 4. Baffles 7 are connected to both sides of the drying heating hoods 4 by bidirectional spring-loaded hinges. Two sets of embedded slots 8 are also provided on the inner side of the drying heating hoods 4. The hydrophobic spraying assembly 3 includes a hydrophobic spraying component 9. Two sets of air supply pipes 10 are connected between the spraying component 9 and the blower 6. This coating heat treatment device can perform preliminary drying treatment on the substrate workpiece after coating processing, and can also perform preheating treatment on the hydrophobic protective agent used to improve the adhesion of the coating. At the same time, it can also perform secondary heat drying treatment on the hydrophobic protective agent sprayed on the surface of the coated workpiece 24. This process can avoid thermal stress concentration caused by excessive temperature difference between the substrate workpiece, the film layer, and the hydrophobic protective agent, enhance the structural stability of the film layer, reduce the probability of quality problems such as cracking and peeling, and improve the overall quality and yield of the coated workpiece 24.

[0030] The hydrophobic spraying component 9 includes a liquid delivery line 11, a heat exchanger 12 installed at the bottom of the liquid delivery line 11, a flow guide shroud 13 installed at the bottom of the heat exchanger 12, a liquid pump 14 installed at the end of the liquid delivery line 11 away from the heat exchanger 12, and a liquid extraction line 15 connected to the end of the liquid pump 14 away from the liquid delivery line 11. Through the coordinated operation of the liquid delivery line 11, heat exchanger 12, flow guide shroud 13, liquid pump 14, and liquid extraction line 15 in the hydrophobic spraying component 9, a stable protective agent delivery, heating, and spraying can be achieved. The process involves pumping the hydrophobic protective agent from the storage end to the delivery line 11 via the pumping line 15. The liquid is heated by heat exchange through the heat exchanger 12 at the bottom, and then evenly sprayed onto the surface of the coated workpiece 24 by the guide shroud 13 connected to the bottom of the heat exchanger 12. This process achieves continuous extraction, preheating, and uniform spraying of the hydrophobic protective agent, effectively avoiding thermal shock caused by excessive temperature difference, improving the spraying effect, enhancing the bonding stability between the protective agent and the film layer, and improving the hydrophobicity and overall quality of the film layer.

[0031] The heat exchanger 12 has an internal heat exchange cavity 16, which is connected to two sets of gas supply lines 10. A spiral heat exchange tube 17 is installed inside the heat exchange cavity 16, and is connected to the liquid supply line 11 and the flow guide shroud 13. This structural design, through the connection between the heat exchange cavity 16 and the two sets of gas supply lines 10, and the connection between the spiral heat exchange tube 17 and the liquid supply line 11 and the flow guide shroud 13, allows the hot airflow from the drying heating shroud 4 to circulate within the heat exchange cavity 16, forming a highly efficient heat exchange with the spiral heat exchange tube 17. This ensures that the hydrophobic protective agent transported within the spiral heat exchange tube 17 is thoroughly and evenly distributed. Preheating treatment ensures that the hydrophobic protective agent reaches the set temperature requirement before spraying, avoiding the risk of stress concentration in the film layer caused by cold spraying, and ensuring uniform spraying and film adhesion. The heat insulation cover 5 includes a cover body 18, with two sets of embedded clamping plates 19 installed at both ends of the cover body 18. The embedded clamping plates 19 and the embedded clamping grooves 8 are structurally matched and are interlocked. Through the interlocking structure design between the embedded clamping plates 19 and the embedded clamping grooves 8, the heat insulation cover 5 and the drying heating cover 4 can be quickly assembled and stably connected, ensuring that the heat insulation cover 5 is accurately positioned and not easily loosened during use, and achieving efficient installation and convenient disassembly of the heat insulation cover 5.

[0032] The drying heating hood 4 has a heating cavity 20 inside, and resistance heaters 21 are distributed inside the heating cavity 20. By installing resistance heaters 21 inside the heating cavity 20, stable high-temperature heat can be generated inside the drying heating hood 4 when the resistance heaters 21 are powered on. When the blower 6 installed at one end of the drying heating hood 4 is powered on, it can drive the high-temperature heat to form a continuous and uniform high-temperature hot airflow. A fixed seat 22 is installed on one side of the workpiece conveyor belt 1, and the inner walls of the workpiece conveyor belt 1 are connected by a transmission. There is a roller 23, and the top of the roller 23 carries the coated workpiece 24. The workpiece conveyor belt 1 has a return groove 25 in the middle near the fixed seat 22. The return groove 25 is connected to the liquid extraction pipe 15. Through the return groove 25 in the middle of the workpiece conveyor belt 1, and the return groove 25 is connected to the liquid extraction pipe 15, the hydrophobic protective agent after use of the hydrophobic spraying component 3 can be collected and returned to the liquid extraction pipe 15, realizing the recycling of the hydrophobic protective agent, improving the material utilization rate, and reducing the production cost.

[0033] Working principle: The coating heat treatment device designed in this scheme mainly consists of a workpiece conveyor belt 1 and a heat treatment mechanism 2. The heat treatment mechanism 2 includes a hydrophobic spraying component 3, a drying heating hood 4, and a heat insulation hood 5. Its working process is as follows: When the coated workpiece 24 is placed on the workpiece conveyor belt 1 and transported into the drying heating hood 4 and the heat insulation hood 5, the drying heating hood 4 starts to operate through the cooperation of the blower 6, the air supply pipeline 10, and the resistance heater 21. Specifically, after the blower 6 and the resistance heater 21 are powered on, a hot airflow is formed inside the drying heating hood 4. This hot airflow blows on the surface of the coated workpiece 24, which can perform preliminary heat drying treatment on the coating layer on the surface of the coated workpiece 24.

[0034] Meanwhile, the blowers 6 installed at both ends of the drying heating hood 4 play a key role. Since the blowers 6 installed at both ends of the drying heating hood 4 rotate in the same direction, one set of blowers 6 blows air into the drying heating hood 4, while the other set draws the hot airflow generated inside the drying heating hood 4 outward. The drawn hot airflow can also be circulated to the heat exchanger 12 through two sets of air supply pipes 10 that are connected to the heat exchange cavity 16 and the heat exchanger 12. This hot airflow can perform heat exchange treatment on the spiral heat exchange tube 17 installed inside the heat exchanger 12. When the hydrophobic protective agent is transported inside the spiral heat exchange tube 17, the hydrophobic protective agent is preheated. The preheated hydrophobic protective agent is sprayed onto the surface of the coated workpiece 24 through the guide hood 13.

[0035] As the coated workpiece 24 continues to be conveyed through the workpiece conveyor belt 1 and passes through the heat insulation cover 5 installed at one end of the drying heating cover 4, the heat insulation cover 5 can perform secondary heat drying treatment on the coated workpiece 24 and the hydrophobic protective agent sprayed on its surface. This series of operations ensures that the coating layer of the coated workpiece 24 can be fully dried after heat treatment, and the hydrophobic protective agent can also be evenly adhered to the surface of the coating layer.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat treatment apparatus for post-coating, comprising a workpiece conveyor belt (1), characterized in that: A heat treatment mechanism (2) is installed on the top of the workpiece conveyor belt (1). The heat treatment mechanism (2) includes a hydrophobic spraying assembly (3). Drying heating covers (4) are provided on both sides of the hydrophobic spraying assembly (3). A heat insulation cover (5) is also connected between the two sets of drying heating covers (4). Both ends of the drying heating cover (4) are equipped with blowers (6), and the two sides of the drying heating cover (4) are connected with baffles (7) through bidirectional spring hinges. The inner side of the drying heating cover (4) is also provided with two sets of embedded slots (8). The hydrophobic spraying assembly (3) includes a hydrophobic spraying component (9), and two sets of air supply pipelines (10) are connected between the hydrophobic spraying component (9) and the blower (6).

2. The heat treatment apparatus for post-coating according to claim 1, characterized in that: The hydrophobic spraying component (9) includes a liquid delivery pipeline (11), a heat exchanger (12) is installed at the bottom of the liquid delivery pipeline (11), a flow guide (13) is installed at the bottom of the heat exchanger (12), a liquid pump (14) is installed at the end of the liquid delivery pipeline (11) away from the heat exchanger (12), and a liquid pump (15) is also connected to the end of the liquid pump (14) away from the liquid delivery pipeline (11).

3. The heat treatment apparatus for post-coating according to claim 2, characterized in that: The heat exchanger (12) has a heat exchange cavity (16) inside, and the heat exchange cavity (16) is connected to two sets of gas pipelines (10). The heat exchange cavity (16) is provided with a spiral heat exchange tube (17), and the spiral heat exchange tube (17) is connected to the liquid pipeline (11) and the flow guide (13).

4. The heat treatment apparatus for post-coating according to claim 3, characterized in that: The heat insulation cover (5) includes a cover body (18), and two sets of embedded card plates (19) are installed at both ends of the cover body (18). The embedded card plates (19) are matched with the embedded card slots (8) in structure, and the embedded card plates (19) and the embedded card slots (8) are engaged.

5. The heat treatment apparatus for post-coating according to claim 4, characterized in that: The drying heating hood (4) has a heating cavity (20) inside, and resistance heaters (21) are distributed inside the heating cavity (20).

6. The heat treatment apparatus for post-coating according to claim 1, characterized in that: A fixed seat (22) is installed on one side of the workpiece conveyor belt (1). Rollers (23) are connected to both sides of the inner wall of the workpiece conveyor belt (1). The top of the rollers (23) carries the coated workpiece (24). A return groove (25) is opened in the middle of the workpiece conveyor belt (1) near the fixed seat (22). The return groove (25) is connected to the liquid extraction pipeline (15).

Images