An aqueous UV coating spray cure system

Abstract

The application discloses a water-based UV coating spraying and curing system, and relates to the technical field of coating spraying and curing.The system comprises a hardware execution module, an inert gas protection and recovery module, a sensing and detecting module, a PLC intelligent control module, a communication module and a composite UVLED curing module; high-purity nitrogen is used to build a micro-positive-pressure oxygen-free curing atmosphere, so that oxygen inhibition, yellowing and pinhole defects are eliminated; a one-way heat conduction structure is arranged in the curing module, one-way heat pipes, one-way heat conduction sheets or gradient heat conduction layers are matched with phase change heat storage layers and graphene heat conduction nets, LED lamp beads are instantaneously and unidirectionally led out, a heat insulation buffer layer is matched to block heat backflow, and heat disturbance of the inert gas flow field is avoided.The curing environment is stable, heat dissipation is efficient, and coating consistency is good, so that the application is suitable for high-end coating scenes such as furniture, 3C electronics and automobile parts, and problems such as oxygen inhibition, heat disturbance and uneven curing of traditional equipment are solved.

Description

Technical Field

[0001] This invention relates to the field of coating spraying and curing technology, and more specifically, to a water-based UV coating spraying and curing system. Background Technology

[0002] Waterborne UV coatings, due to their advantages such as low VOC emissions, environmental safety, fast curing speed, and excellent coating performance, have been widely used in surface coating fields such as furniture, building materials, 3C electronics, and automotive parts. However, in actual industrial spraying and curing production, existing technologies still have several insurmountable shortcomings, as follows: The curing environment is unstable. Conventional UV curing equipment does not have inert gas protection, and the oxygen content in the curing area is high, which can easily cause problems such as insufficient surface drying of the coating, oxygen inhibition, yellowing, pinholes, and decreased adhesion.

[0003] Heat disturbance disrupts the curing atmosphere. Traditional UV-LED light sources mostly rely on bidirectional conduction for heat dissipation. The instantaneous high heat of the LED beads directly disturbs the inert gas flow field in the curing area, resulting in uneven gas concentration, local oxygen content rebound, and large temperature fluctuations. This makes it impossible to maintain a static and stable oxygen-free protective atmosphere, significantly reducing the curing consistency of thick coatings and complex surface coatings. At the same time, the heat dissipation structure of the curing light source is simple, with low thermal conductivity and obvious heat reflow. Long-term operation can easily lead to problems such as LED bead attenuation, shortened lifespan, and decreased equipment stability. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a water-based UV coating spraying and curing system that offers a stable curing environment, efficient heat dissipation, and good coating consistency. It is suitable for high-end coating applications such as furniture, 3C electronics, and automotive parts, and solves problems such as oxygen inhibition, thermal disturbance, and uneven curing associated with traditional equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A water-based UV coating spraying and curing system, comprising a hardware execution module for realizing substrate conveying, coating spraying and UV curing of the coating, including a substrate conveying unit and a spraying unit; Inert gas protection and recovery module: Provides a stable oxygen-free environment for coating curing, while realizing the recycling of inert gases; Sensing and detection module: Collects various parameter data during system operation to provide data support for precise control; The PLC intelligent control module is electrically connected to the hardware execution module, the inert gas protection and recovery module, and the sensing and detection module, respectively. It processes, analyzes, and coordinates the collected parameter data to build a closed-loop collaborative control for the entire process. Communication module: includes light source temperature communication unit, ambient parameter communication unit, closed-loop control communication unit, and anti-interference redundant communication unit; Composite UV-LED curing module: includes a curing structure and several heat-conducting structures arranged in a circumferential array inside the curing structure; the heat-conducting structures are used to unidirectionally conduct the instantaneous high heat generated by the LED beads, maintain the static stability of the inert gas protective atmosphere in the curing area, and avoid heat conduction and gas disturbance from interfering with the curing environment.

[0006] The present invention is further configured as follows: a substrate conveying unit: used to realize stable and continuous conveying of substrate, the conveying speed can be steplessly adjusted within a specified range to adapt to the curing requirements of coatings of different thicknesses, and at the same time integrates a substrate positioning and correction unit to avoid substrate conveying deviation; Spraying unit: Used for precise spraying of water-based UV coatings onto the substrate surface with a spray gun. It is equipped with a coating amount adjustment unit, which can dynamically adjust the coating amount according to the coating thickness requirements. It also integrates a coating spray detection sensor to monitor the spray gun spraying status in real time.

[0007] The present invention is further configured such that: the inert gas protection and recovery module includes: Inert gas supply unit: supplies industrial nitrogen with a purity of ≥99.99%, which is precisely delivered to the curing area through distributed nozzles to maintain a slight positive pressure of 0.02-0.03MPa in the curing area; Recycling unit: It adopts a combination structure of molecular sieve dryer and precision filter to dry and filter the nitrogen gas discharged from the solidification area; Leak detection unit: Equipped with a nitrogen leak detection sensor, which automatically cuts off the nitrogen supply and issues an audible and visual warning when a leak is detected.

[0008] The present invention is further configured with: a light source temperature communication unit: which collects data on the working temperature of the LED beads and the thermal conductivity status of the thermal conductive structure in real time, and uploads it to the PLC intelligent control module; Atmosphere parameter communication unit: Real-time acquisition of inert gas concentration, oxygen content, and micro-positive pressure value in the curing area to monitor the static stability of the protective atmosphere; Closed-loop control and communication unit: Based on temperature data and atmospheric stability, the output power of the LED beads is dynamically adjusted to match the heat generation of the LED beads with the unidirectional heat dissipation capacity of the heat conduction structure, ensuring the continuous stability of the curing atmosphere; Anti-interference redundant communication unit: Adopting industrial dual-link redundant communication, it ensures that temperature, atmosphere, and control command data are transmitted without delay, packet loss, or interference in the sealed curing environment. It is responsible for the low-level transmission of all data and commands, anti-interference processing, error checking, and automatic link switching, ensuring that data is transmitted without delay, packet loss, or interference in the sealed curing environment, and providing reliable transmission support for the above three communication units.

[0009] The present invention is further configured such that: the sensing and detection module includes: Coating parameter sensors: including coating amount sensor and coating thickness sensor; Environmental parameter sensors: including sensors for ambient temperature, humidity, and dust concentration, which monitor various parameters of the construction environment; Equipment operation sensors include infrared temperature measurement, wind speed, UV light intensity, and heat pipe temperature difference sensors, which monitor the equipment's operating status. Among them, the infrared temperature measurement sensor is used to monitor the temperature of the lamp beads and phase change heat storage layer to ensure the stability of the unidirectional heat storage-heat release cycle. Quality inspection sensors: including sensors for coating defect detection, coating moisture content, and substrate surface temperature, to monitor coating quality and related conditions in real time.

[0010] The present invention is further configured such that: the solidification structure includes a shell; an outer cylinder and an inner cylinder are coaxially arranged inside the shell; a plurality of supporting spokes are uniformly fixed between the inner cylinder and the outer cylinder; one end of the outer cylinder is sealed, and the other end is hinged to a sealing door; a plurality of heat dissipation fins corresponding to the corresponding heat conduction structure are uniformly fixed on the inner wall of the outer cylinder. The thermally conductive structure includes an aluminum alloy substrate that runs through and is fixed to the inner wall of the inner cylinder; thermally conductive silicone is provided on the bottom surface of the aluminum alloy substrate; several LED beads are uniformly fixed to the bottom surface of the aluminum alloy substrate through the thermally conductive silicone; a phase change heat storage layer is provided above the aluminum alloy substrate; a graphene thermally conductive mesh is embedded on the surface of the phase change heat storage layer; a heat-insulating sealant is provided between the surface of the phase change heat storage layer and the outer wall of the graphene thermally conductive mesh; the heat dissipation fins adopt an integrally molded aluminum alloy structure, the surface is anodized and blackened, and they are tightly attached to the graphene thermally conductive mesh on the side of the phase change heat storage layer near the heat dissipation fins.

[0011] The present invention is further configured such that: the heat-conducting structure also includes a heat-insulating buffer layer disposed between the aluminum alloy substrate and the phase change heat storage layer; a high-temperature resistant adhesive and a high-temperature resistant sealant are respectively disposed between the heat-insulating buffer layer and the aluminum alloy substrate and the phase change heat storage layer; the heat-conducting structure also includes a unidirectional heat pipe penetrating the phase change heat storage layer and the heat-insulating buffer layer; one end of the unidirectional heat pipe is fixed to the heat dissipation fins by a reflow soldering process, and the other end is tightly bonded to the aluminum alloy substrate by thermally conductive silicone. The unidirectional heat pipe is made of oxygen-free copper, filled with deionized water, and its inner wall is uniformly provided with copper mesh capillary cores. The heat insulation buffer layer is made of ceramic fiber cotton and high-temperature resistant silicone composite material.

[0012] The present invention is further configured such that: the heat-conducting structure also includes a unidirectional heat-conducting sheet laid on the surface of the aluminum alloy substrate; a heat-insulating buffer layer is provided between the surface of the aluminum alloy substrate and the outer wall of the unidirectional heat-conducting sheet; and a high-temperature resistant sealant is provided between the unidirectional heat-conducting sheet and the phase change heat storage layer. The unidirectional heat conduction sheet is made of silicone substrate and boron nitride thermal conductive filler composite molding; the heat insulation buffer layer is made of ceramic fiber cotton and high temperature resistant silicone composite material.

[0013] The present invention is further configured such that: the thermally conductive structure also includes a high thermal conductivity layer, a gradient transition layer, and a low thermal conductivity conductive layer disposed sequentially from top to bottom between the aluminum alloy substrate and the phase change heat storage layer; the high thermal conductivity layer is made of copper foil / graphene thermal conductive film; the gradient transition layer is made of graphite composite sheet / alumina ceramic sheet; the low thermal conductivity conductive layer is made of high thermal conductivity flexible graphite / carbon-based thermal conductive sheet; the thermally conductive structure also includes a heat insulation buffer layer attached to the outer wall of the high thermal conductivity layer, the gradient transition layer, and the low thermal conductivity conductive layer.

[0014] The advantages of this invention are: This invention uses nitrogen gas with a purity of ≥99.99% and a micro-positive pressure of 0.02-0.03MPa for airtight protection, resulting in extremely low oxygen content in the curing area, which inhibits oxygen polymerization, yellowing, and pinhole defects. Combined with precise spraying and real-time thickness detection, the coating uniformity, adhesion, gloss, and weather resistance are greatly improved, and thick coatings and complex surfaces can be formed in one step.

[0015] The composite UV-LED curing module of this invention adopts a unidirectional heat conduction structure to direct the instantaneous high heat of the LED beads in a directional manner, eliminating heat backflow and gas flow field disturbance; in conjunction with the graphene heat conduction mesh, phase change heat storage layer and unidirectional heat pipe for coordinated heat dissipation, the temperature, gas concentration and pressure of the curing area remain statically stable for a long time, ensuring curing consistency and repeatability.

[0016] The phase change heat storage layer of this invention is used to absorb and stably release the instantaneous high heat of LED beads, suppressing temperature fluctuations. When used in conjunction with a unidirectional heat pipe / unidirectional heat conduction sheet / gradient heat conduction layer, it directs the heat of the LED beads unidirectionally and quickly to the outer heat dissipation fins, preventing heat from flowing back into the curing chamber, avoiding thermal disturbance that could damage the inert gas protective atmosphere in the curing area, and ensuring the static stability of the curing environment and the quality of coating formation. Attached Figure Description

[0017] Figure 1 This is a system flowchart of the present invention.

[0018] Figure 2 This is a block diagram of the hardware execution module of the present invention.

[0019] Figure 3 This is a block diagram of the inert gas protection and recovery module of the present invention.

[0020] Figure 4 This is a block diagram of the communication module of the present invention.

[0021] Figure 5 This is a block diagram of the sensor module of the present invention.

[0022] Figure 6 This is a schematic diagram of the composite UV-LED curing module of the present invention.

[0023] Figure 7 This is a schematic diagram of the heat-conducting structure in Embodiment 2 of the present invention.

[0024] Figure 8 This is a schematic diagram of the heat-conducting structure in Embodiment 3 of the present invention.

[0025] Figure 9 This is a schematic diagram of the heat-conducting structure in Embodiment 4 of the present invention.

[0026] In the diagram: 1. Solidified structure; 2. LED beads; 3. Housing; 4. Outer cylinder; 5. Inner cylinder; 6. Support spokes; 7. Heat dissipation fins; 8. Aluminum alloy substrate; 9. Thermally conductive silicone; 10. Phase change heat storage layer; 11. Graphene thermal conductive mesh; 12. Thermally insulating sealant; 13. Thermally insulating buffer layer; 14. High-temperature resistant adhesive; 15. High-temperature resistant sealant; 16. One-way heat pipe; 17. Copper mesh capillary core; 18. One-way heat conduction sheet; 19. High thermal conductivity layer; 20. Gradient transition layer; 21. Low thermal conductivity conductive layer. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0030] Example 1, please refer to Figure 1-9 The present invention provides the following technical solutions: A water-based UV coating spraying and curing system, specifically, includes a hardware execution module for realizing substrate conveying, coating spraying and UV curing of the coating, comprising a substrate conveying unit and a spraying unit.

[0031] Inert gas protection and recovery module: Provides a stable oxygen-free environment for coating curing, while realizing the recycling of inert gases.

[0032] Sensing and detection module: Collects various parameter data during system operation to provide data support for precise control.

[0033] The PLC intelligent control module is electrically connected to the hardware execution module, the inert gas protection and recovery module, and the sensing and detection module, respectively. It processes, analyzes, and coordinates the collected parameter data to build a closed-loop collaborative control system for the entire process.

[0034] Communication module: includes light source temperature communication unit, ambient parameter communication unit, closed-loop control communication unit, and anti-interference redundant communication unit.

[0035] Composite UV-LED curing module: includes curing structure 1 and several heat-conducting structures arranged in a circumferential array inside curing structure 1; the heat-conducting structures are used to unidirectionally conduct the instantaneous high heat generated by LED beads 2, maintain the static stability of the inert gas protective atmosphere in the curing area, and avoid heat conduction and gas disturbance from interfering with the curing environment.

[0036] Substrate conveying unit: Used to achieve stable and continuous conveying of substrates. The conveying speed can be steplessly adjusted within a specified range to adapt to the curing requirements of coatings of different thicknesses. It also integrates a substrate positioning and correction unit to prevent substrate conveying deviation.

[0037] Spraying unit: Used for precise spraying of water-based UV coatings onto the substrate surface with a spray gun. It is equipped with a coating amount adjustment unit, which can dynamically adjust the coating amount according to the coating thickness requirements. It also integrates a coating spray detection sensor to monitor the spray gun spraying status in real time.

[0038] The inert gas protection and recovery module includes: Inert gas supply unit: supplies industrial nitrogen with a purity of ≥99.99%, which is precisely delivered to the curing area through distributed nozzles to maintain a slight positive pressure of 0.02-0.03MPa in the curing area.

[0039] Recycling unit: It adopts a combination structure of molecular sieve dryer and precision filter to dry and filter the nitrogen gas discharged from the solidification area.

[0040] Leak detection unit: Equipped with a nitrogen leak detection sensor with a detection accuracy of ≤10ppm. When a leak is detected, it automatically cuts off the nitrogen supply and issues an audible and visual warning.

[0041] The communication module includes: Light source temperature communication unit: collects real-time data on the operating temperature of LED beads 2 and the thermal conductivity status of the thermal conductive structure, and uploads it to the PLC intelligent control module.

[0042] Atmosphere parameter communication unit: Real-time acquisition of inert gas concentration, oxygen content, and micro-positive pressure value in the curing area to monitor the static stability of the protective atmosphere.

[0043] Closed-loop control and communication unit: Based on temperature data and atmospheric stability, the output power of LED lamp beads 2 is dynamically adjusted to match the heat generation of LED lamp beads 2 with the unidirectional heat conduction capacity of the heat conduction structure, ensuring the continuous stability of the curing atmosphere.

[0044] Anti-interference redundant communication unit: adopts industrial dual-link redundant communication to ensure that temperature, atmosphere and control command data are transmitted without delay, packet loss and interference in the sealed curing environment.

[0045] The sensing and detection module includes: Coating parameter sensors: including coating amount sensor with a detection accuracy of ±0.5μm and coating thickness sensor with a detection accuracy of ±1μm; Environmental parameter sensors: including sensors for ambient temperature, humidity, and dust concentration, which monitor various parameters of the construction environment; Equipment operation sensors include infrared temperature measurement, wind speed, UV light intensity, and heat pipe temperature difference sensors, which monitor the equipment's operating status. Among them, the infrared temperature measurement sensor is used to monitor the temperature of the lamp beads and phase change heat storage layer to ensure the stability of the unidirectional heat storage-heat release cycle. Quality inspection sensors: including sensors for coating defect detection, coating moisture content, and substrate surface temperature, to monitor coating quality and related conditions in real time.

[0046] Working principle of this embodiment: After the system is powered on, the substrate conveying unit smoothly delivers the workpiece into the workstation, and the spraying unit precisely applies the water-based UV coating according to the set thickness. The inert gas protection and recovery module quickly establishes a 0.02-0.03MPa micro-positive pressure oxygen-free atmosphere to suppress oxygen inhibition, yellowing, and pinhole defects. The sensing and detection module collects data such as coating thickness, temperature and humidity, LED temperature, and UV light intensity in real time, and uploads them to the PLC intelligent control module via the communication module. The PLC adjusts the conveying speed, spraying volume, LED output power, and nitrogen flow rate in conjunction with the process curve. The composite UV-LED curing module unidirectionally discharges the instantaneous high heat generated by the LED beads 2, avoiding heat backflow that disturbs the gas flow field, and keeping the temperature, concentration, and pressure of the curing area stable for a long time, ultimately achieving a high-gloss, high-adhesion, and high-uniform one-time curing of the coating.

[0047] Example 2 Please see Figure 1-6 as well as Figure 7 This second embodiment is an improvement on the first embodiment as follows: Specifically, the solidified structure 1 includes a shell 3; an outer cylinder 4 and an inner cylinder 5 are coaxially arranged inside the shell 3; a number of supporting spokes 6 are uniformly fixed between the inner cylinder 5 and the outer cylinder 4; one end of the outer cylinder 4 is sealed, and the other end is hinged to a sealing door; a number of heat dissipation fins 7 corresponding to the corresponding heat conduction structure are uniformly fixed on the inner wall of the outer cylinder 4. The thermally conductive structure includes an aluminum alloy substrate 8 that is fixed through the inner wall of the inner cylinder 5; a thermally conductive silicone 9 is provided on the bottom surface of the aluminum alloy substrate 8; several LED beads 2 are uniformly fixed on the bottom surface of the aluminum alloy substrate 8 through the thermally conductive silicone 9; a phase change heat storage layer 10 is provided above the aluminum alloy substrate 8; a graphene thermally conductive mesh 11 is embedded on the surface of the phase change heat storage layer 10; a heat-insulating sealant 12 is provided between the surface of the phase change heat storage layer 10 and the outer wall of the graphene thermally conductive mesh 11; the heat dissipation fins 7 adopt an integrally formed aluminum alloy structure, the surface is anodized and blackened, and is tightly attached to the graphene thermally conductive mesh 11 on the side of the phase change heat storage layer 10 near the heat dissipation fins 7.

[0048] The heat-conducting structure also includes a heat-insulating buffer layer 13 disposed between the aluminum alloy substrate 8 and the phase change heat storage layer 10; a high-temperature resistant adhesive 14 and a high-temperature resistant sealant 15 are respectively disposed between the heat-insulating buffer layer 13, the aluminum alloy substrate 8, and the phase change heat storage layer 10; the heat-conducting structure also includes a unidirectional heat pipe 16 penetrating the phase change heat storage layer 10 and the heat-insulating buffer layer 13; one end of the unidirectional heat pipe 16 is fixed to the heat dissipation fins 7 by a reflow soldering process, and the other end is tightly bonded to the aluminum alloy substrate 8 by thermally conductive silicone 9.

[0049] The unidirectional heat pipe 16 is made of oxygen-free copper and filled with deionized water. Its inner wall is uniformly provided with copper mesh capillary cores 17.

[0050] The heat insulation buffer layer 13 is made of ceramic fiber cotton and high-temperature resistant silicone composite material. It is located between the aluminum alloy substrate 8 and the phase change heat storage layer 10, and wraps around the root of the unidirectional heat pipe 16. The heat insulation buffer layer 13 is made of ceramic fiber cotton and high-temperature resistant silicone composite material, which has an extremely low thermal conductivity. It directly blocks the heat from the phase change heat storage layer 10 and the heat dissipation fins 7 from flowing back to the aluminum alloy substrate 8 and the LED beads 2 through solid conduction. The unidirectional heat pipe 16 conducts heat outward at high speed, but there is still residual heat on the outer wall of the heat pipe. The heat insulation buffer layer 13 completely isolates the unidirectional heat pipe 16 from the inner aluminum alloy substrate 8, preventing the heat on the outer wall of the unidirectional heat pipe 16 from being conducted back to the curing cavity.

[0051] Working principle of this embodiment two: The heat generated by the LED bead 2 is rapidly conducted to the aluminum alloy substrate 8 via the thermally conductive silicone 9; the unidirectional heat pipe 16 uses phase change and capillary action to guide the heat to the heat dissipation fins 7 at high speed in one direction; the phase change heat storage layer 10 absorbs the instantaneous peak heat and smooths the temperature fluctuation; the graphene thermal mesh 11 enhances heat uniformity; the heat insulation buffer layer 13 completely blocks the heat return path; with the help of nitrogen micro-positive pressure protection, there is no thermal disturbance, no oxygen content rebound, and no sudden temperature change in the curing cavity, which greatly improves the curing uniformity of thick coating / irregular surface and significantly extends the life of the LED bead 2.

[0052] The specific principle of unidirectional heat conduction is explained as follows: The inner end (evaporation end) of the unidirectional heat pipe 16 is in close contact with the aluminum alloy substrate (8) → close to the LED bead 2 → continuous high temperature; The outer end (condenser end) of the unidirectional heat pipe 16 is welded to the heat sink fin 7 → connecting to the outside world → maintaining a low temperature. When the system is running: the internal temperature is greater than the external temperature, thus forming a fixed unidirectional thermal difference.

[0053] Only the hot end (inner end) allows the working fluid (deionized water) to absorb heat and vaporize into steam. The cold end (heat dissipation fin 7) has a low temperature, so the steam can only release heat and condense back into liquid here. According to the laws of thermodynamics, steam can only diffuse from the high temperature zone to the low temperature zone and cannot travel from the low temperature zone back to the high temperature zone.

[0054] The unidirectional heat pipe 16 can employ an asymmetric flow channel design internally: Evaporator end (inner side): Large space, high vaporization rate → generates a large amount of steam. Condensing end (outer side): The condensing zone has a small volume and low pressure → steam is quickly "drawn away", the inner pressure is greater than the outer pressure → the pressure difference pushes the steam to flow only outward and cannot flow back.

[0055] The function of the copper mesh capillary 17 on the inner wall of the heat pipe is to draw the condensed liquid back from the outer end to the inner end without hindering the flow of steam from the inner end to the outer end. The liquid flows through the copper mesh capillary 17 and the steam flows through the central channel, so the two phases are completely separated, do not interfere with each other, and do not flow back.

[0056] In summary, the LED beads 2 cause the inner end of the unidirectional heat pipe 16 to continuously vaporize at high temperature, while the outer end heat dissipation fins 7 continuously condense at low temperature. Under the combined action of temperature difference, pressure difference, capillary directional drive and heat insulation buffer layer 13, the steam can only flow unidirectionally from the inner end evaporation zone to the outer end condensation zone and cannot flow in the opposite direction, thus achieving unidirectional heat conduction.

[0057] Example 3, please refer to Figure 1-5 as well as Figure 8 This embodiment three is an improvement on the first embodiment as follows: Specifically, the solidified structure 1 includes a shell 3; an outer cylinder 4 and an inner cylinder 5 are coaxially arranged inside the shell 3; a number of supporting spokes 6 are uniformly fixed between the inner cylinder 5 and the outer cylinder 4; one end of the outer cylinder 4 is sealed, and the other end is hinged to a sealing door; a number of heat dissipation fins 7 corresponding to the corresponding heat conduction structure are uniformly fixed on the inner wall of the outer cylinder 4. The thermally conductive structure includes an aluminum alloy substrate 8 that is fixed through the inner wall of the inner cylinder 5; a thermally conductive silicone 9 is provided on the bottom surface of the aluminum alloy substrate 8; several LED beads 2 are uniformly fixed on the bottom surface of the aluminum alloy substrate 8 through the thermally conductive silicone 9; a phase change heat storage layer 10 is provided above the aluminum alloy substrate 8; a graphene thermally conductive mesh 11 is embedded on the surface of the phase change heat storage layer 10; a heat-insulating sealant 12 is provided between the surface of the phase change heat storage layer 10 and the outer wall of the graphene thermally conductive mesh 11; the heat dissipation fins 7 adopt an integrally formed aluminum alloy structure, the surface is anodized and blackened, and is tightly attached to the graphene thermally conductive mesh 11 on the side of the phase change heat storage layer 10 near the heat dissipation fins 7.

[0058] The heat-conducting structure also includes a one-way heat-conducting sheet 18 laid on the surface of the aluminum alloy substrate 8; a heat-insulating buffer layer 13 is provided between the surface of the aluminum alloy substrate 8 and the outer wall of the one-way heat-conducting sheet 18; and a high-temperature resistant sealant 15 is provided between the one-way heat-conducting sheet 18 and the phase change heat storage layer 10.

[0059] The heat insulation buffer layer 13 is located between the aluminum alloy substrate 8 and the unidirectional heat conduction sheet 18. The unidirectional heat conduction sheet 18 itself has directional heat conduction capability. The heat insulation buffer layer 13 further increases the reverse thermal resistance from below, making upward heat conduction easier and making the direction of the unidirectional heat conduction sheet more clear. It prevents the heat absorbed by the unidirectional heat conduction sheet 18 and the phase change heat storage layer 10 from being conducted back to the aluminum alloy substrate 8 through interlayer contact, fills the gap between the aluminum alloy substrate 8 and the unidirectional heat conduction sheet 18, prevents the formation of thermal bridges in air gaps and ensures that the overall planar heat dissipation structure only flows outward and not inward.

[0060] The unidirectional heat conduction sheet 18 is made of silicone substrate and boron nitride thermal conductive filler composite molding; the heat insulation buffer layer 13 is made of ceramic fiber cotton and high temperature resistant silicone composite material.

[0061] Working principle of this embodiment three: Heat from the LED beads 2 enters the unidirectional heat conduction sheet 18 via the aluminum alloy substrate 8, utilizing the high directional thermal conductivity of boron nitride to achieve uniform unidirectional heat transfer in a planar manner; the heat insulation buffer layer 13 prevents heat backflow; the phase change heat storage layer 10 stabilizes the temperature, the graphene heat conduction mesh 11 distributes heat evenly, and finally the heat dissipation fins 7 efficiently dissipate heat; the structure is lightweight, quiet, highly reliable, and easy to assemble. Under the premise of maintaining the static stability of the curing atmosphere, it significantly reduces the size of the equipment and maintenance costs, and is suitable for small and medium-sized continuous production lines and flat substrate coating.

[0062] Example 4, please refer to Figure 1-5 as well as Figure 9This fourth embodiment is an improvement on the first embodiment. Specifically, the solidified structure 1 includes a shell 3; an outer cylinder 4 and an inner cylinder 5 are coaxially arranged inside the shell 3; a number of supporting spokes 6 are uniformly fixed between the inner cylinder 5 and the outer cylinder 4; one end of the outer cylinder 4 is sealed, and the other end is hinged to a sealing door; a number of heat dissipation fins 7 corresponding to the corresponding heat conduction structure are uniformly fixed on the inner wall of the outer cylinder 4. The thermally conductive structure includes an aluminum alloy substrate 8 that is fixed through the inner wall of the inner cylinder 5; a thermally conductive silicone 9 is provided on the bottom surface of the aluminum alloy substrate 8; several LED beads 2 are uniformly fixed on the bottom surface of the aluminum alloy substrate 8 through the thermally conductive silicone 9; a phase change heat storage layer 10 is provided above the aluminum alloy substrate 8; a graphene thermally conductive mesh 11 is embedded on the surface of the phase change heat storage layer 10; a heat-insulating sealant 12 is provided between the surface of the phase change heat storage layer 10 and the outer wall of the graphene thermally conductive mesh 11; the heat dissipation fins 7 adopt an integrally formed aluminum alloy structure, the surface is anodized and blackened, and is tightly attached to the graphene thermally conductive mesh 11 on the side of the phase change heat storage layer 10 near the heat dissipation fins 7.

[0063] The thermally conductive structure also includes a high thermal conductivity layer 19, a gradient transition layer 20, and a low thermal conductivity conductive layer 21, which are disposed sequentially from top to bottom between the aluminum alloy substrate 8 and the phase change heat storage layer 10. The high thermal conductivity layer 19 is made of copper foil / graphene thermal conductive film; the gradient transition layer 20 is made of graphite composite sheet / alumina ceramic sheet; and the low thermal conductivity conductive layer 21 is made of high thermal conductivity flexible graphite / carbon-based thermal conductive sheet. The thermally conductive structure also includes a heat insulation buffer layer 13 attached to the outer wall of the high thermal conductivity layer 19, the gradient transition layer 20, and the low thermal conductivity conductive layer 21. The thermal conductivity of the low thermal conductivity conductive layer 21 is lower than that of the gradient transition layer 20 and higher than that of the heat insulation buffer layer 13.

[0064] The thermal insulation buffer layer 13 is wrapped around the high thermal conductivity layer 19, the gradient transition layer 20, and the low thermal conductivity conductive layer 21. The gradient layer (high thermal conductivity layer 19 → gradient transition layer 20 → low thermal conductivity conductive layer 21) achieves "high → medium → low" directional heat conduction. The thermal insulation buffer layer 13 has a much lower thermal conductivity than the low thermal conductivity conductive layer 21, forming a final blockage to ensure that heat can only flow outward along the gradient. The gradient heat conduction layer has a multi-layer sheet structure, which is prone to lateral heat dissipation and backflow. The thermal insulation buffer layer 13 fully covers and isolates the heat, confining it within the forward heat conduction path and preventing the inner temperature from affecting the temperature distribution of the gradient layer. This ensures that the entire process of heat collection, heat conduction, and heat release is stable and free from reverse interference.

[0065] Working principle of Example 4: The LED beads 2 generate instantaneous high heat, which is rapidly collected by the high thermal conductivity layer 19 to eliminate local hot spots; then the heat is smoothly conducted through the gradient transition layer 20 to avoid thermal shock and gas disturbance; then the low thermal conductivity conductive layer 21 releases heat directionally to the phase change heat storage layer 10; the phase change material stores heat and stabilizes the temperature, and the graphene heat conduction mesh 11 evenly conducts the heat to the heat dissipation fins 7; the heat insulation buffer layer 13 completely blocks heat backflow; the temperature / atmosphere / pressure / light intensity of the curing chamber remains constant for a long time, which can meet the high requirements of high-speed production lines, thick coatings and multi-layers, and high-end 3C / automotive exterior parts, etc., with optimal equipment stability and product yield.

[0066] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0067] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0068] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0070] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A water-based UV coating spraying and curing system, characterized in that, include: Hardware execution module: used to realize substrate delivery, coating spraying and coating UV curing, including substrate delivery unit and spraying unit; Inert gas protection and recovery module: Provides a stable oxygen-free environment for coating curing, while realizing the recycling of inert gases; Sensing and detection module: Collects various parameter data during system operation to provide data support for precise control; The PLC intelligent control module is electrically connected to the hardware execution module, the inert gas protection and recovery module, and the sensing and detection module, respectively. It processes, analyzes, and coordinates the collected parameter data to build a closed-loop collaborative control for the entire process. Communication module: includes light source temperature communication unit, ambient parameter communication unit, closed-loop control communication unit, and anti-interference redundant communication unit; Composite UV-LED curing module: includes a curing structure (1) and several heat-conducting structures arranged in a circumferential array inside the curing structure (1); The heat-conducting structure is used to unidirectionally dissipate the instantaneous high heat generated by the LED beads (2), maintain the static stability of the inert gas protective atmosphere in the curing area, and avoid heat conduction and gas disturbance from interfering with the curing environment.

2. The water-based UV coating spraying and curing system according to claim 1, characterized in that: Substrate conveying unit: Used to achieve stable and continuous conveying of substrates. The conveying speed can be steplessly adjusted within a specified range to adapt to the curing requirements of coatings of different thicknesses. It also integrates a substrate positioning and correction unit to prevent substrate conveying deviation. Spraying unit: Used for precise spraying of water-based UV coatings onto the substrate surface with a spray gun. It is equipped with a coating amount adjustment unit, which can dynamically adjust the coating amount according to the coating thickness requirements. It also integrates a coating spray detection sensor to monitor the spray gun spraying status in real time.

3. The water-based UV coating spraying and curing system according to claim 1, characterized in that, The inert gas protection and recovery module includes: Inert gas supply unit: supplies industrial nitrogen with a purity of ≥99.99%, which is precisely delivered to the curing area through distributed nozzles to maintain a slight positive pressure of 0.02-0.03MPa in the curing area; Recycling unit: It adopts a combination structure of molecular sieve dryer and precision filter to dry and filter the nitrogen gas discharged from the solidification area; Leak detection unit: Equipped with a nitrogen leak detection sensor, which automatically cuts off the nitrogen supply and issues an audible and visual warning when a leak is detected.

4. The water-based UV coating spraying and curing system according to claim 1, characterized in that: Light source temperature communication unit: collects the working temperature and thermal conductivity status data of LED beads (2) in real time and uploads them to the PLC intelligent control module; Atmosphere parameter communication unit: Real-time acquisition of inert gas concentration, oxygen content, and micro-positive pressure value in the curing area to monitor the static stability of the protective atmosphere; Closed-loop control communication unit: Based on temperature data and atmospheric stability, dynamically adjust the output power of LED beads (2) so that the heat generation of LED beads (2) matches the unidirectional heat conduction capacity of the heat conduction structure, ensuring the continuous stability of the curing atmosphere; Anti-interference redundant communication unit: adopts industrial dual-link redundant communication to ensure that temperature, atmosphere and control command data are transmitted without delay, packet loss and interference in the sealed curing environment.

5. The water-based UV coating spraying and curing system according to claim 4, characterized in that, The sensing and detection module includes: Coating parameter sensors: including coating amount sensor and coating thickness sensor; Environmental parameter sensors: including sensors for ambient temperature, humidity, and dust concentration, which monitor various parameters of the construction environment; Equipment operation sensors include infrared temperature measurement, wind speed, UV light intensity, and heat pipe temperature difference sensors, which monitor the equipment's operating status. Among them, the infrared temperature measurement sensor is used to monitor the temperature of the lamp beads and phase change heat storage layer to ensure the stability of the unidirectional heat storage-heat release cycle. Quality inspection sensors: including sensors for coating defect detection, coating moisture content, and substrate surface temperature, to monitor coating quality and related conditions in real time.

6. The water-based UV coating spraying and curing system according to claim 1, characterized in that: The solidified structure (1) includes a shell (3); an outer cylinder (4) and an inner cylinder (5) are coaxially arranged inside the shell (3); a number of supporting spokes (6) are uniformly fixed between the inner cylinder (5) and the outer cylinder (4); one end of the outer cylinder (4) is sealed, and the other end is hinged to a sealing door; a number of heat dissipation fins (7) corresponding to the corresponding heat conduction structure are uniformly fixed on the inner wall of the outer cylinder (4). The heat-conducting structure includes an aluminum alloy substrate (8) that runs through and is fixed to the inner wall of the inner cylinder (5); thermally conductive silicone (9) is provided on the bottom surface of the aluminum alloy substrate (8); several LED beads (2) are uniformly fixed to the bottom surface of the aluminum alloy substrate (8) through the thermally conductive silicone (9); a phase change heat storage layer (10) is provided above the aluminum alloy substrate (8); a graphene heat-conducting mesh (11) is embedded on the surface of the phase change heat storage layer (10); a heat-insulating sealant (12) is provided between the surface of the phase change heat storage layer (10) and the outer wall of the graphene heat-conducting mesh (11); the heat dissipation fins (7) adopt an integral aluminum alloy structure, the surface is anodized and blackened, and are tightly attached to the graphene heat-conducting mesh (11) on the side of the phase change heat storage layer (10) near the heat dissipation fins (7).

7. The water-based UV coating spraying and curing system according to claim 6, characterized in that: The heat-conducting structure also includes a heat insulation buffer layer (13) disposed between the aluminum alloy substrate (8) and the phase change heat storage layer (10); a high-temperature resistant adhesive (14) and a high-temperature resistant sealant (15) are respectively disposed between the heat insulation buffer layer (13), the aluminum alloy substrate (8), and the phase change heat storage layer (10); the heat-conducting structure also includes a unidirectional heat pipe (16) penetrating the phase change heat storage layer (10) and the heat insulation buffer layer (13); one end of the unidirectional heat pipe (16) is fixed to the heat dissipation fins (7) by a reflow soldering process, and the other end is tightly bonded to the aluminum alloy substrate (8) by thermally conductive silicone (9); The unidirectional heat pipe (16) is made of oxygen-free copper, filled with deionized water, and its inner wall is uniformly provided with copper mesh capillary core (17). The heat insulation buffer layer (13) is made of ceramic fiber cotton and high temperature resistant silicone composite material.

8. The water-based UV coating spraying and curing system according to claim 6, characterized in that: The heat-conducting structure also includes a one-way heat-conducting sheet (18) laid on the surface of the aluminum alloy substrate (8); a heat-insulating buffer layer (13) is provided between the surface of the aluminum alloy substrate (8) and the outer wall of the one-way heat-conducting sheet (18); a high-temperature resistant sealant (15) is provided between the one-way heat-conducting sheet (18) and the phase change heat storage layer (10); the one-way heat-conducting sheet (18) is made of silicone substrate and boron nitride thermally conductive filler composite molding; the heat-insulating buffer layer (13) is made of ceramic fiber cotton and high-temperature resistant silicone composite material.

9. A water-based UV coating spraying and curing system according to claim 6, characterized in that: The thermal conductive structure also includes a high thermal conductivity layer (19), a gradient transition layer (20), and a low thermal conductivity conductive layer (21) arranged sequentially from top to bottom between the aluminum alloy substrate (8) and the phase change heat storage layer (10); the high thermal conductivity layer (19) is made of copper foil / graphene thermal conductive film; the gradient transition layer (20) is made of graphite composite sheet / alumina ceramic sheet; the low thermal conductivity conductive layer (21) is made of high thermal conductivity flexible graphite / carbon-based thermal conductive sheet; the thermal conductive structure also includes a heat insulation buffer layer (13) attached to the outer wall of the high thermal conductivity layer (19), the gradient transition layer (20), and the low thermal conductivity conductive layer (21).

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