A continuous photocuring furnace integrated with a post-heating and hardening treatment

Abstract

This invention relates to the field of photocuring technology, specifically to a continuous photocuring oven integrating heat-curing and post-curing processes. The oven includes: a photocuring component, a heating mechanism, a hot air circulation mechanism, a belt conveyor mechanism, and a photocuring oven body. The belt conveyor mechanism is equipped with a multi-degree-of-freedom mounting component for mounting workpieces and enabling both active and passive workpiece movements. The heating section of the heating mechanism is connected to an insulation space via the hot air circulation mechanism. The hot air circulation mechanism drives hot air to circulate within the insulation space and adjusts the temperature of various parts within the photocuring oven body according to preset control parameters. This invention integrates photocuring and heat-curing processes into a continuous workstation within the same photocuring oven body, effectively shortening the overall production cycle, adapting to batch production lines, and eliminating localized temperature differences within the oven by using a heating mechanism in conjunction with a hot air circulation mechanism to drive the full-area circulation of hot air, thus improving the consistency of batch products.

Description

Technical Field

[0001] This invention relates to the field of photocuring technology, and more specifically to a continuous photocuring oven that integrates heating and post-curing processes. Background Technology

[0002] With the promotion of environmentally friendly surface treatment processes, UV-curable coatings have been widely used in precision manufacturing, consumer electronics, and automotive parts due to their fast curing speed, low VOC emissions, and excellent coating performance. To further improve the crosslinking density, adhesion, hardness, and weather resistance of the coating, most UV-curable coatings require a post-curing heating process after UV curing. This constant-temperature heating promotes deep polymerization of the coating to meet the demands of high-performance applications.

[0003] In current production, UV curing and post-heat curing are often completed in separate processes using two independent machines: the workpiece is first surface-dried in a UV curing oven, and then manually or via a transfer line into a heating oven for post-curing. However, this separate process has significant drawbacks. The interruptions in the process lead to long production cycles and low efficiency, making it difficult to adapt to the demands of high-speed continuous mass production. Furthermore, during workpiece transfer, the incompletely cured coating is susceptible to dust contamination and external impacts, resulting in poor appearance and performance defects, making it difficult to guarantee product yield. In actual operation, the two independent ovens each have their own insulation, heating, and control systems, resulting in large equipment footprints, high overall energy consumption, and high production and operating costs. Currently, some UV curing ovens with integrated heating functions have appeared in the industry, but they mostly use fixed fixtures or flat mesh belts to transport workpieces, and the curing process... With a fixed workpiece orientation, irregularly shaped structural parts with curved surfaces, sidewalls, and internal cavities are prone to developing blind spots in light and heat, resulting in uneven curing of the coating at different locations. The hardness and adhesion of the coating on the sides and backlit surfaces are difficult to meet the standards. Moreover, most existing equipment places the heating tube directly above the workpiece, allowing heat radiation to directly bake the workpiece surface. The fixed curing angle can easily cause local overheating, blistering, aging, and discoloration of the coating, affecting its appearance and performance. At the same time, the lack of reasonable turbulence and flow guidance structures leads to turbulent hot air flow in the furnace, with multiple eddies and dead zones. The temperature difference between different workstations in the furnace is large, resulting in significant differences in the degree of hardening of workpieces in the same batch and poor product consistency. Summary of the Invention

[0004] The technical problem to be solved by this invention is that existing photocuring equipment has low integration, many process interruptions, and cannot achieve efficient photocuring process. It is also difficult to control. At the same time, it often uses fixed fixtures or flat mesh belts to transport workpieces. The workpiece posture is fixed during the curing process, which easily leads to uneven curing degree of the coating at different positions. The hardness and adhesion of the coating on the side and back surface are difficult to meet the standards, resulting in poor curing effect.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a continuous photocuring oven integrating heat-curing treatment, comprising:

[0006] A photocuring component is used to generate curing rays to cure photocurable coatings on a workpiece;

[0007] Heating mechanism, used to heat air to regulate the temperature inside the UV curing oven;

[0008] The hot air circulation mechanism is used to drive the circulation of hot air to regulate the temperature of various parts inside the UV curing oven.

[0009] Belt conveyor mechanisms are used to install and move workpieces to achieve workstation changes;

[0010] The UV curing oven body is used to provide the mounting base;

[0011] The photocuring oven body is provided with a heat-insulating space for workpiece movement. The belt conveyor mechanism is installed in the heat-insulating space and extends along the direction of workpiece movement. The belt conveyor mechanism is provided with a multi-degree-of-freedom mounting component for mounting workpieces and realizing active and passive movements of the workpieces. The light-emitting part of the photocuring component is arranged at the first end of the heat-insulating space and above the belt conveyor mechanism. The heating part of the heating mechanism is connected to the air passage of the heat-insulating space through a hot air circulation mechanism. The hot air circulation mechanism drives the hot air to circulate in the heat-insulating space and adjusts the temperature of each part in the photocuring oven body according to preset control parameters. The workpiece mounted on the belt conveyor mechanism is passively moved under the drive of the hot air to dynamically adjust the curing angle.

[0012] When this invention is in operation, it integrates the two processes of photocuring and post-heat curing into a continuous station within the same photocuring oven. This eliminates the need to transfer materials between two machines, preventing damage and contamination of incompletely cured coatings during transport. It effectively shortens the overall production cycle, is suitable for mass production on assembly lines, and uses a heating mechanism in conjunction with a hot air circulation mechanism to drive the hot air to circulate throughout the oven. This eliminates local temperature differences within the oven, preventing problems such as uneven coating curing and adhesion caused by uneven temperature, thus improving the consistency of batch products. Furthermore, the multi-degree-of-freedom mounting components allow the material to be passively oscillated under the action of hot air, thereby dynamically adjusting the angle of light and heat exposure to ensure uniform curing of the coating at all locations. This eliminates the need for additional multi-angle light sources, effectively reducing equipment costs and control complexity.

[0013] Preferably, the multi-degree-of-freedom mounting assembly includes a mounting base, several rotating components, several swinging components, a transmission component, and an active drive device. The several rotating components are sequentially mounted on the mounting base along the direction of workpiece movement. The rotating parts of the several rotating components are respectively connected to the output part of the active drive device through their respective transmission components. The several swinging components are respectively mounted on the rotating parts of their respective rotating components. The swinging components are provided with swinging parts for mounting the workpiece and for the workpiece to synchronously adjust the curing angle with the flow of hot air. The swinging parts of the several swinging components rotate synchronously under the drive of the active drive device.

[0014] When this invention is in operation, the combination of active rotation and passive oscillation can be achieved through the cooperation of the rotating component and the oscillating component. This allows the workpiece to simultaneously achieve 360° circumferential rotation and a wide range of pitch oscillation, thereby significantly improving the coverage of light and heat exposure. This avoids the problem of insufficient curing on the sides and backlit surfaces of complex workpieces. Furthermore, the oscillating component can directly utilize the airflow energy of the hot air circulation to achieve adaptive angle adjustment. This simplifies the mechanical structure inside the photocuring oven, reduces power consumption, and avoids additional wiring and routing that would occupy insulation space. It is easy to control and has a good curing effect.

[0015] Preferably, the rotating assembly includes a rotating shaft, a mounting base, and a boundary indicator plate for indicating the workpiece mounting boundary. The rotating shaft is rotatably mounted on the mounting base via the mounting base, and the boundary indicator plate is mounted on the top of the rotating shaft. The transmission assembly includes a synchronous belt, a driving synchronous pulley, a driven synchronous pulley, a pressure pulley, a driving gear, a driven gear, and a driven gear shaft. The driving gear is coaxially mounted on the output part of the driving device. There are several driven gears, each rotatably mounted on the mounting base via its corresponding driven gear shaft. All driven gears are connected to the driving gear. A driving synchronous pulley is coaxially mounted on each driven gear shaft. There are several driven synchronous pulleys, each coaxially mounted on its corresponding rotating shaft. The driving synchronous pulley and the corresponding driven synchronous pulley are connected by a synchronous belt. The pressure pulley is arranged on one side of the synchronous belt and abuts against the synchronous belt to adjust the synchronous belt tension.

[0016] Preferably, the swing assembly includes a swing bracket, a mounting fixture, and a damping adjustment assembly. The swing bracket has hollowed-out mounting ears protruding upwards on both sides. The mounting fixture is rotatably arranged between the two mounting ears. The mounting fixture is rotatably connected to the mounting ears with damping through the damping adjustment assembly. The damping magnitude of the damping adjustment assembly is set to be adjustable.

[0017] When this invention is in operation, the damping adjustment component provides damping constraint for the oscillation, preventing the workpiece from shaking or falling off excessively under the impact of airflow, making the oscillation process smooth and controllable, the workpiece posture is stable during the curing process, ensuring uniform coating curing, and the damping value can be adjusted sequentially according to actual needs. By matching the corresponding damping value with the workpiece weight, windward area, and hot air wind speed, it can be adapted to workpieces of different specifications and materials, effectively expanding the process application range of the equipment.

[0018] Preferably, the heating mechanism includes several sets of heating tubes, which are arranged sequentially in the light curing oven along the direction of workpiece movement and located above the heat preservation space. A baffle is provided between the heating tubes and the heat preservation space, and a circulation window is provided at the edge of the baffle to allow hot air to pass smoothly. The hot air input end of the hot air circulation mechanism is connected to the air path of the heating mechanism through the circulation window.

[0019] During operation, this invention uses multiple sets of heating tubes arranged sequentially along the material conveying direction to independently control the temperature of the insulation space. This creates a temperature gradient along the conveying path, consisting of a preheating curing section, a heating section, and a constant-temperature curing section. This allows for high flexibility in process adjustment. Furthermore, a baffle plate physically separates the heating tubes from the insulation space, preventing the infrared radiation from the heating tubes from directly baking the workpiece. This prevents localized overheating, blistering, aging, and discoloration of the coating, ensuring the appearance and performance of the coating. It also does not excessively obstruct the circulation of hot air and can guide the hot air to flow orderly from the edge circulation window, forming a regular circulating flow field. This reduces eddies and dead zones within the curing oven and further improves the temperature uniformity within the curing oven.

[0020] Preferably, several heating tubes in several groups of heating tubes are arranged sequentially along the direction of hot air circulation. Each heating tube is provided with several heat dissipation fins to improve heat exchange efficiency. The gaps between the heat dissipation fins are maintained to allow hot air to circulate, and these gaps are arranged to extend along the direction of hot air circulation.

[0021] Preferably, the device also includes a pressure-maintaining mechanism for regulating the air pressure within the insulation space. The pressure-maintaining mechanism includes a gas collecting hood, a multi-bladed impeller, and a pressure-maintaining drive device. The gas collecting hood is installed inside the UV curing oven body. The air inlet of the gas collecting hood is located at the end of the hot air circulation path inside the UV curing oven body, and the air outlet of the gas collecting hood is connected to the first end of the hot air circulation path inside the UV curing oven body. The multi-bladed impeller is rotatably installed at the air outlet of the gas collecting hood and is connected to the output part of the pressure-maintaining drive device. The multi-bladed impeller drives the airflow under the drive of the pressure-maintaining drive device to regulate the air pressure within the insulation space.

[0022] Preferably, the system also includes a protective gas supply mechanism for supplying protective gas. The output of the protective gas supply mechanism is connected to the gas path of the gas collecting hood and supplies protective gas into the photocuring oven according to preset control parameters.

[0023] During operation, this invention continuously pressurizes the space through a multi-bladed impeller, maintaining a stable slightly positive pressure. This prevents cold air and dust from entering the curing oven, avoiding dust adhering to the uncured coating surface and forming particle defects. It also reduces hot air leakage and heat loss. Simultaneously, the hot air at the end of the circulation is collected by the gas collection hood, pressurized by the multi-bladed impeller, and sent back to the beginning of the circulation to compensate for the pressure loss of hot air between the pipeline and the workpiece. This ensures stable hot air velocity and volume throughout the process, facilitating the maintenance of uniform temperature within the oven. Furthermore, a protective gas supply mechanism introduces protective gases such as nitrogen into the curing oven, preventing the oxygen inhibition effect during curing, improving the coating's curing crosslinking degree and hardness, and preventing oxidation and yellowing of the coating during high-temperature hardening, thus ensuring a uniform appearance and color.

[0024] Preferably, the system also includes an exhaust mechanism for discharging waste gas, wherein the air inlet of the exhaust mechanism is connected to the end of the hot air circulation path inside the photocuring oven, and the waste gas is discharged when the air in the heat preservation space deteriorates.

[0025] When this invention is in operation, it can promptly discharge small molecule volatiles and organic solvent vapors generated during photocuring and heating, preventing volatiles from accumulating in the furnace and condensing on the surface of the workpiece to form oil spots and haze. At the same time, it prevents volatiles from adhering to the surface of the photocuring components, maintaining the output efficiency of the light source. It can also cooperate with the pressure holding mechanism to achieve orderly discharge of exhaust gas while maintaining a slight positive pressure in the furnace. This ensures both heat preservation and dust prevention effects, while avoiding excessively high furnace pressure that could lead to hot air leakage and increased energy consumption.

[0026] Preferably, the hot air circulation mechanism includes several circulating fans, fan mounting plates, and angle adjustment mechanisms. The fan mounting plates are angle-adjustably installed on one side of the insulation space. Several openings for hot air to pass through are provided on the fan mounting plates. Several circulating fans are installed on their respective corresponding openings. Several angle adjustment mechanisms are provided and fixedly installed inside the light curing oven body. The angle adjustment parts of the several angle adjustment mechanisms are respectively connected to corresponding parts of the edge of the fan mounting plates. The fan mounting plates swing under the drive of the angle adjustment mechanisms to adjust the direction of hot air flow.

[0027] When this invention is in operation, the overall swing fan mounting plate of the angle adjustment mechanism can uniformly adjust the air outlet direction of all circulating fans, optimize the flow field distribution inside the furnace, and match the optimal air direction for workpieces of different sizes and placement methods, thereby improving temperature and curing uniformity. By adjusting the air outlet angle, the direction and magnitude of the force exerted by the hot air on the workpiece can be changed, thereby indirectly adjusting the amplitude of the passive swing of the workpiece, thus enriching the process adjustment methods. It can adapt to more workpiece types without modifying the mechanical structure, and has good versatility.

[0028] The beneficial technical effects of this invention include:

[0029] 1. This invention integrates the two processes of photocuring and post-heat curing into a continuous workstation within the same photocuring oven, eliminating the need to transfer materials between two machines. This avoids damage and contamination of incompletely cured coatings during transfer, effectively shortening the overall production cycle and adapting to mass production on assembly lines. Furthermore, the heating mechanism, in conjunction with a hot air circulation mechanism, drives the hot air to circulate throughout the oven, eliminating localized temperature differences and preventing issues such as inconsistent coating curing levels and adhesion caused by uneven temperature distribution. This improves batch product consistency. The multi-degree-of-freedom mounting components allow the material to passively oscillate under the influence of hot air, dynamically adjusting the angle of light and heat exposure to ensure uniform curing of the coating at all locations. This eliminates the need for additional multi-angle light sources, effectively reducing equipment costs and control complexity.

[0030] 2. This invention, through the cooperation of the rotating component and the swinging component, can achieve a combination of active rotation and passive swinging, allowing the workpiece to simultaneously achieve 360° circumferential rotation and a wide range of pitch swinging, thereby significantly improving the coverage of light and heat, avoiding the problem of insufficient curing on the sides and backlit surfaces of complex workpieces. Furthermore, the swinging component can directly utilize the airflow energy of the hot air circulation to achieve adaptive angle adjustment, which simplifies the mechanical structure inside the light curing oven, reduces power consumption, avoids additional wiring and routing occupying insulation space, has low control difficulty, and provides good curing effect.

[0031] 3. This invention provides damping constraints for the oscillation through a damping adjustment component, preventing the workpiece from shaking or falling off excessively under the impact of airflow, making the oscillation process smooth and controllable, ensuring the stability of the workpiece posture during the curing process, guaranteeing uniform coating curing, and allowing the damping value to be adjusted sequentially according to actual needs. By matching the corresponding damping value with the workpiece weight, windward area, and hot air velocity, it can be adapted to workpieces of different specifications and materials, effectively expanding the process application range of the equipment.

[0032] 4. This invention uses multiple sets of heating tubes arranged sequentially along the material conveying direction to independently control the temperature of the insulation space. A temperature gradient is formed along the conveying path, consisting of a preheating curing section, a heating section, and a constant-temperature curing section. This allows for high flexibility in process adjustment. Furthermore, a baffle plate is used to physically separate the heating tubes from the insulation space, preventing the infrared radiation of the heating tubes from directly baking the workpiece. This prevents local overheating, blistering, aging, and discoloration of the coating, ensuring the appearance and performance of the coating. It does not excessively obstruct the circulation of hot air and can guide the hot air to flow orderly from the edge circulation window, forming a regular circulating flow field. This reduces eddies and dead zones in the curing oven and further improves the temperature uniformity within the curing oven.

[0033] 5. This invention uses a multi-bladed impeller to continuously pressurize the space, maintaining a stable slightly positive pressure and preventing cold air and dust from entering the curing oven. This avoids dust adhering to the uncured coating surface and forming particle defects, while also reducing hot air leakage and heat loss. Simultaneously, a gas collection hood collects hot air from the end of the circulation loop, pressurizes it again by the multi-bladed impeller, and sends it back to the beginning of the loop to compensate for the pressure loss of hot air between the pipes and the workpiece. This ensures stable hot air velocity and volume throughout the process, facilitating temperature uniformity within the oven. Furthermore, a protective gas supply mechanism introduces protective gases such as nitrogen into the curing oven, preventing the oxygen inhibition effect during curing, improving the coating's cross-linking degree and hardness, and preventing oxidation and yellowing during high-temperature hardening, thus ensuring a uniform appearance.

[0034] 6. This invention can promptly discharge small molecule volatiles and organic solvent vapors generated during photocuring and heating, preventing volatiles from accumulating in the furnace and condensing on the workpiece surface to form oil spots and haze. At the same time, it prevents volatiles from adhering to the surface of the photocuring components, maintaining the output efficiency of the light source. It can also cooperate with the pressure holding mechanism to achieve orderly discharge of exhaust gas while maintaining a slight positive pressure in the furnace. This ensures both heat preservation and dust prevention effects, while avoiding excessively high furnace pressure that could lead to hot air leakage and increased energy consumption.

[0035] 7. This invention uses an angle adjustment mechanism to swing the fan mounting plate, which can uniformly adjust the air outlet direction of all circulating fans, optimize the flow field distribution inside the furnace, match the optimal air direction for workpieces of different sizes and placement methods, improve temperature and curing uniformity, and change the direction and magnitude of the force exerted by the hot air on the workpiece by adjusting the air outlet angle, thereby indirectly adjusting the amplitude of the passive swing of the workpiece, thus enriching the process adjustment methods. It can adapt to more workpiece types without modifying the mechanical structure, and has good versatility.

[0036] Other features and advantages of the present invention will be described in detail in the following detailed description and accompanying drawings. Attached Figure Description

[0037] The invention will be further described below with reference to the accompanying drawings:

[0038] Figure 1 This is a schematic diagram of a continuous photocuring oven that integrates heat-curing and post-curing processes.

[0039] Figure 2 This is a schematic diagram of the structure of some components in a continuous photocuring oven that integrates heat-curing processes. Figure 1 (Some parts are omitted);

[0040] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0041] Figure 4This is a schematic diagram of the structure of some components in a continuous photocuring oven that integrates heat-curing processes. Figure 2 (Some parts are omitted);

[0042] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0043] Figure 6 Schematic diagram of the structure of the multi-degree-of-freedom mounting component Figure 1 ;

[0044] Figure 7 Schematic diagram of the structure of the multi-degree-of-freedom mounting component Figure 2 ;

[0045] Figure 8 This is a partially enlarged view (exploded view) of a continuous photocuring oven that integrates heat-curing treatment. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0047] In the following description, terms such as “inner,” “outer,” “upper,” “lower,” “left,” and “right” are used only to indicate orientation or positional relationship for the convenience of describing the embodiments and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0048] Example 1:

[0049] Please see Figures 1 to 8 This embodiment discloses a continuous photocuring oven with integrated heat-curing treatment, comprising:

[0050] Photocuring component 1 is used to generate curing rays to cure the photocurable coating on the workpiece;

[0051] Heating mechanism 2 is used to heat air to regulate the temperature inside the UV curing oven 5;

[0052] Hot air circulation mechanism 3 is used to drive the circulation of hot air to regulate the temperature of various parts inside the light curing oven 5.

[0053] Belt conveyor mechanism 4 is used to install and drive the workpiece to achieve workstation switching;

[0054] UV curing oven body 5, used to provide an installation base;

[0055] The UV curing oven body 5 is provided with a heat-insulating space for workpiece movement. The belt conveyor mechanism 4 is installed in the heat-insulating space and extends along the direction of workpiece movement. The belt conveyor mechanism 4 is provided with a multi-degree-of-freedom mounting component 41 for mounting workpieces and realizing active and passive movements of the workpieces. The light-emitting part of the UV curing component 1 is arranged at the first end of the heat-insulating space and above the belt conveyor mechanism 4. The heating part of the heating mechanism 2 is connected to the air passage of the heat-insulating space through the hot air circulation mechanism 3. The hot air circulation mechanism 3 drives the hot air to circulate in the heat-insulating space and adjusts the temperature of each part in the UV curing oven body 5 according to the preset control parameters. The workpieces mounted on the belt conveyor mechanism 4 are passively moved under the drive of the hot air to dynamically adjust the curing angle.

[0056] In this embodiment, the two processes of light curing and post-heat curing can be integrated into a continuous station in the same light curing oven 5. There is no need to transfer materials between two machines, avoiding damage and contamination of the incompletely cured coating during the transfer process. This can effectively shorten the overall production cycle and is suitable for batch production on assembly lines. The heating mechanism 2, together with the hot air circulation mechanism 3, drives the hot air to circulate throughout the entire area, which can eliminate local temperature differences in the oven and avoid problems such as uneven curing degree and large differences in adhesion caused by uneven temperature. This improves the consistency of batch products. The multi-degree-of-freedom mounting component 41 can drive the material to swing passively under the action of hot air, thereby dynamically adjusting the angle of light and heat exposure, so that the curing degree of the coating is uniform in all positions. There is no need to add additional multi-angle light sources, which can effectively reduce equipment costs and control difficulty.

[0057] In this embodiment, the heating mechanism 2 includes several sets of heating tubes 21. The sets of heating tubes 21 are arranged sequentially in the light curing oven body 5 along the direction of workpiece movement and are located above the heat preservation space. A baffle 51 is provided between the heating tubes 21 and the heat preservation space. A circulation window 511 is provided at the edge of the baffle 51 to allow the hot air to pass smoothly. The hot air input end of the hot air circulation mechanism 3 is connected to the air path of the heating mechanism 2 through the circulation window 511. During operation, the different temperatures of different areas in the heat preservation space can be adjusted by controlling the heating power of each set of heating tubes 21. No additional control mechanism is required, which can effectively reduce the control difficulty of temperature zone control and ensure temperature matching when performing different processing steps.

[0058] In this embodiment, multiple sets of heating tubes 21 are arranged sequentially along the material conveying direction, allowing for independent zoned temperature control of the insulation space. A temperature gradient is formed along the conveying path, consisting of a preheating curing section, a heating section, and a constant-temperature curing section. This provides high flexibility in process adjustment. Furthermore, a baffle 51 is used to physically separate the heating tubes 21 from the insulation space, preventing the infrared radiation from the heating tubes 21 from directly baking the workpiece. This prevents localized overheating, blistering, aging, and discoloration of the coating, ensuring the appearance and performance of the coating. It also does not excessively obstruct the circulation of hot air and can guide the hot air to flow orderly from the edge circulation window 511, forming a regular circulating flow field. This reduces eddies and dead zones within the curing oven, further improving the temperature uniformity within the curing oven.

[0059] As a further improvement of this embodiment, several heating tubes 21 in several groups of heating tubes 21 are arranged sequentially along the direction of hot air circulation. Each heating tube 21 is provided with several heat dissipation fins 211 to improve heat exchange efficiency. The gaps between the heat dissipation fins 211 are maintained to allow hot air to flow. The gaps are arranged to extend along the direction of hot air circulation. During operation, the heat dissipation fins 211 greatly increase the contact area between the heating tube 21 and the air, significantly improving the heat exchange efficiency, resulting in faster furnace heating speed and lower heating power at the same furnace temperature, effectively reducing production energy consumption. Furthermore, the gaps between the fins extend along the direction of hot air circulation, resulting in low resistance when the airflow passes through, preventing turbulence and local eddies, and ensuring a stable circulating air field. This reduces fan operating noise and avoids airflow turbulence affecting the workpiece's swing posture.

[0060] Example 2:

[0061] Please see Figures 1 to 8 This embodiment provides a continuous photocuring oven that integrates heating and post-curing treatment. The similarities with other embodiments will not be repeated here. The differences will be described in detail below.

[0062] In this embodiment, the multi-degree-of-freedom mounting assembly 41 includes a mounting base 411, several rotating components 412, several swinging components 413, a transmission component 414, and an active drive device 415. Several rotating components 412 are sequentially mounted on the mounting base 411 along the direction of workpiece movement. The rotating parts of several rotating components 412 are respectively connected to the output part of the active drive device 415 through their respective transmission components 414. Several swinging components 413 are respectively mounted on the rotating parts of their respective rotating components 412. The swinging components 413 are provided with swinging parts for mounting workpieces and for allowing the workpieces to synchronously adjust the curing angle with the flow of hot air. The swinging parts of several swinging components 413 rotate synchronously under the drive of the active drive device 415.

[0063] In this embodiment, the combination of active rotation and passive oscillation can be achieved through the cooperation of the rotating component 412 and the swinging component 413. This allows the workpiece to simultaneously achieve 360° circumferential rotation and a wide range of pitch oscillation, thereby significantly improving the coverage of light and heat. This avoids the problem of insufficient curing on the sides and back surfaces of complex workpieces. Furthermore, the swinging component 413 can directly utilize the airflow energy of the hot air circulation to achieve adaptive angle adjustment. This simplifies the mechanical structure inside the photocuring oven, reduces power consumption, avoids additional wiring and routing that would occupy insulation space, and results in low control difficulty and good curing effect.

[0064] In a specific implementation, the rotating assembly 412 includes a rotating shaft 4121, a mounting base 4122, and a boundary indicator plate 4123 for indicating the workpiece mounting boundary. The rotating shaft 4121 is rotatably mounted on the mounting base 411 via the mounting base 4122. The boundary indicator plate 4123 is mounted on the top of the rotating shaft 4121. The transmission assembly 414 includes a synchronous belt 4141, a driving synchronous belt pulley 4142, a driven synchronous belt pulley 4143, a pressure pulley 4144, a driving gear 4145, a driven gear 4146, and a driven gear shaft 4147. The driving gear 4145 is coaxially mounted on the output part of the driving device 415, and the driven gear 4146... Several driven gears 4146 are provided and rotatably mounted on the mounting base 411 via their respective driven gear shafts 4147. Each driven gear 4146 is connected to the driving gear 4145. Each driven gear shaft 4147 is coaxially mounted with a driving synchronous pulley 4142. Several driven synchronous pulleys 4143 are provided and coaxially mounted on their respective rotating shafts 4121. The driving synchronous pulleys 4142 and the corresponding driven synchronous pulleys 4143 are connected by a synchronous belt 4141. The pressure pulley 4144 is arranged on one side of the synchronous belt 4141 and abuts against the synchronous belt 4141 to adjust the tension of the synchronous belt 4141.

[0065] Preferably, the swing assembly 413 includes a swing bracket 4131, a mounting fixture 4132, and a damping adjustment assembly 4133. The swing bracket 4131 has hollowed-out mounting ears 41311 protruding upwards on both sides. The mounting fixture 4132 is rotatably arranged between the two mounting ears 41311. The mounting fixture 4132 is rotatably connected to the mounting ears 41311 with damping through the damping adjustment assembly 4133. The damping magnitude of the damping adjustment assembly 4133 is set to be adjustable.

[0066] In this embodiment, the damping adjustment component 4133 provides damping constraint for the swing, preventing the workpiece from shaking or falling off excessively under the impact of airflow, making the swing process smooth and controllable, and ensuring the stability of the workpiece posture during the curing process, thus ensuring uniform coating curing. The damping value can be adjusted sequentially according to actual needs. By matching the corresponding damping value with the workpiece weight, windward area, and hot air velocity, it can be adapted to workpieces of different specifications and materials, effectively expanding the process applicability range of the equipment.

[0067] In this embodiment, the belt conveyor mechanism 4 further includes a mounting plate 42 with several multi-degree-of-freedom mounting components 41, a conveyor belt assembly 43, and a connecting component 44 for quickly connecting the mounting plate 42. Several connecting components 44 are provided and are sequentially installed on the conveying part of the conveyor belt assembly 43 along the extension direction of the conveyor belt assembly 43. Several multi-degree-of-freedom mounting components 41 are evenly arranged on the mounting plate 42. After the photocurable coating is applied, the mounting plate 42 is conveyed to the belt conveyor mechanism 4 by the corresponding feeding mechanism and connected to the connecting component 44 to move under the drive of the conveyor belt assembly 43. Finally, after the heat curing treatment is completed, it is taken out by the corresponding material picking mechanism. This process is repeated, which can realize the fully automatic operation of photocuring and heat curing treatment, and is suitable for large-scale production.

[0068] Example 3:

[0069] Please see Figures 1 to 8 This embodiment provides a continuous photocuring oven that integrates heating and post-curing treatment. The similarities with other embodiments will not be repeated here. The differences will be described in detail below.

[0070] In this embodiment, a pressure-holding mechanism 6 for adjusting the air pressure in the heat-insulating space is also included. The pressure-holding mechanism 6 includes a gas collecting hood 61, a multi-bladed impeller 62, and a pressure-holding drive device 63. The gas collecting hood 61 is installed inside the UV curing oven body 5. The air inlet end of the gas collecting hood 61 is arranged at the end of the hot air circulation path inside the UV curing oven body 5, and the air outlet end of the gas collecting hood 61 is connected to the first end of the hot air circulation path inside the UV curing oven body 5. The multi-bladed impeller 62 is rotatably installed at the air outlet end of the gas collecting hood 61 and is connected to the output part of the pressure-holding drive device 63. The multi-bladed impeller 62 drives the air flow under the drive of the pressure-holding drive device 63 to adjust the air pressure in the heat-insulating space. When working, the shape of the gas collecting hood 61 can be set as a funnel shape, which can achieve a large area of ​​air intake and pressure boosting output effect, with good energy saving effect and low equipment load.

[0071] Preferably, it also includes a protective gas supply mechanism 7 for supplying protective gas. The output of the protective gas supply mechanism 7 is connected to the gas path of the gas collecting hood 61, and supplies protective gas to the light curing oven body 5 according to preset control parameters. During operation, a gas sensor can also be installed in the gas collecting hood 61 to dynamically adjust the gas supply according to the real-time oxygen content in the light curing oven according to preset parameters, so as to avoid the waste caused by continuous high flow rate gas supply and further optimize the operating cost.

[0072] In this embodiment, the multi-bladed impeller 62 continuously pressurizes the space, maintaining a stable slightly positive pressure. This prevents cold air and dust from entering the curing oven, avoiding dust adhering to the uncured coating surface and forming particle defects. It also reduces hot air leakage and heat loss. Simultaneously, the hot air at the end of the circulation is collected by the gas collection hood 61, pressurized by the multi-bladed impeller 62, and sent back to the beginning of the circulation to compensate for the pressure loss of hot air between the pipeline and the workpiece. This ensures stable hot air velocity and volume throughout the process, facilitating the maintenance of uniform temperature inside the oven. Furthermore, the protective gas supply mechanism 7 introduces protective gases such as nitrogen into the curing oven body 5, preventing the oxygen inhibition effect during the curing process, improving the coating's curing crosslinking degree and hardness, and preventing oxidation and yellowing of the coating during high-temperature hardening, thus ensuring uniform appearance and color.

[0073] As a further improvement of this embodiment, it also includes an exhaust mechanism 8 for discharging exhaust gas. The air inlet of the exhaust mechanism 8 is connected to the end of the hot air circulation path inside the light curing oven body 5, and exhaust gas is discharged when the air in the heat preservation space deteriorates.

[0074] During operation, this embodiment can promptly discharge small molecule volatiles and organic solvent vapors generated during photocuring and heating, preventing volatiles from accumulating in the furnace and condensing on the workpiece surface to form oil spots and haze. At the same time, it prevents volatiles from adhering to the surface of the photocuring component 1, maintaining the output efficiency of the light source. It can also cooperate with the pressure holding mechanism 6 to achieve orderly discharge of exhaust gas while maintaining a slight positive pressure in the furnace. This ensures both heat preservation and dust prevention effects, while also preventing excessively high furnace pressure from causing hot air leakage and increased energy consumption.

[0075] Example 4:

[0076] Please see Figures 1 to 8 This embodiment provides a continuous photocuring oven that integrates heating and post-curing treatment. The similarities with other embodiments will not be repeated here. The differences will be described in detail below.

[0077] In this embodiment, the hot air circulation mechanism 3 includes several circulating fans 31, a fan mounting plate 32, and an angle adjustment mechanism 33. The fan mounting plate 32 is angle-adjustably installed on one side of the insulation space. Several openings for hot air to pass through are provided on the fan mounting plate 32. Several circulating fans 31 are respectively installed on their respective corresponding openings. Several angle adjustment mechanisms 33 are provided and are respectively fixedly installed inside the light curing oven body 5. The angle adjustment parts of the several angle adjustment mechanisms 33 are respectively connected to the corresponding parts of the edge of the fan mounting plate 32. The fan mounting plate 32 swings under the drive of the angle adjustment mechanism 33. The direction of hot air flow can be adjusted by the angle adjustment mechanism 33. During operation, the air outlet angle of several circulating fans 31 can be actively controlled by the angle adjustment mechanism 33, which can form several relatively independent heating zones in the curing oven. For example, during the curing process, only slight preheating of the workpiece is required. Before the curing process, the workpiece is heated to a stable temperature until it reaches constant temperature curing. In actual operation, the temperature gradient distribution can be further adjusted according to the material characteristics of different curing coatings to match the process characteristics of the curing coatings as much as possible. No additional hardware adjustments are required. The operation is convenient, fast, and highly flexible.

[0078] In this embodiment, the air outlet direction of all circulating fans 31 can be uniformly adjusted by the angle adjustment mechanism 33 and the overall swing fan mounting plate 32, thereby optimizing the flow field distribution inside the furnace. The optimal air direction can be matched for workpieces of different sizes and different placement methods, improving temperature and curing uniformity. By adjusting the air outlet angle, the direction and magnitude of the force exerted by the hot air on the workpiece can be changed, thereby indirectly adjusting the amplitude of the passive swing of the workpiece. This enriches the process adjustment methods and can adapt to more workpiece types without modifying the mechanical structure, demonstrating good versatility.

[0079] The beneficial technical effects of this embodiment include: it can integrate the two processes of light curing and heat curing into a continuous station in the same light curing oven, eliminating the need to transfer materials between two devices, avoiding damage and contamination of incompletely cured coatings during transfer, effectively shortening the overall production cycle, adapting to batch production on assembly lines, and eliminating local temperature differences in the oven by using a heating mechanism in conjunction with a hot air circulation mechanism to drive the hot air to circulate throughout the oven, avoiding problems such as uneven coating curing degree and large differences in adhesion caused by uneven temperature, improving the consistency of batch products, and using multi-degree-of-freedom mounting components to drive the material to oscillate passively under the action of hot air, thereby dynamically adjusting the angle of light and heat exposure, making the curing degree of the coating uniform in all positions, eliminating the need for additional multi-angle light sources, effectively reducing equipment costs and control difficulty.

[0080] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A continuous photocuring oven integrating heat-curing post-treatment, characterized in that, include: A photocuring component (1) is used to generate curing rays to cure photocurable coatings on a workpiece; Heating mechanism (2) is used to heat air to regulate the temperature inside the light curing oven body (5); The hot air circulation mechanism (3) is used to drive the hot air circulation to regulate the temperature of each part inside the light curing oven body (5); Belt conveyor (4) is used to install and drive the workpiece to move in order to achieve workstation switching; The UV curing oven body (5) is used to provide the installation base; The photocuring oven body (5) is provided with a heat-insulating space for workpiece movement. The belt conveyor mechanism (4) is installed in the heat-insulating space and extends along the direction of workpiece movement. The belt conveyor mechanism (4) is provided with a multi-degree-of-freedom mounting component (41) for mounting workpieces and realizing active and passive movements of workpieces. The light-emitting part of the photocuring component (1) is arranged at the beginning of the heat-insulating space and above the belt conveyor mechanism (4). The heating part of the heating mechanism (2) is connected to the air passage of the heat-insulating space through the hot air circulation mechanism (3). The hot air circulation mechanism (3) drives the hot air to circulate in the heat-insulating space and adjusts the temperature of each part in the photocuring oven body (5) according to the preset control parameters. The workpieces installed on the belt conveyor mechanism (4) are passively moved under the drive of the hot air to dynamically adjust the curing angle.

2. The continuous photocuring oven with integrated heating and post-curing treatment according to claim 1, characterized in that: The multi-degree-of-freedom mounting assembly (41) includes a mounting base (411), several rotating components (412), several swinging components (413), a transmission component (414), and an active drive device (415). Several rotating components (412) are sequentially mounted on the mounting base (411) along the direction of workpiece movement. The rotating parts of several rotating components (412) are respectively connected to the output part of the active drive device (415) through their respective transmission components (414). Several swinging components (413) are respectively mounted on the rotating parts of their respective rotating components (412). The swinging components (413) are provided with swinging parts for mounting workpieces and for allowing the workpieces to synchronously adjust the curing angle with the flow of hot air. The swinging parts of several swinging components (413) rotate synchronously under the drive of the active drive device (415).

3. The continuous photocuring oven with integrated heating and post-curing treatment according to claim 2, characterized in that: The rotating assembly (412) includes a rotating shaft (4121), a mounting base (4122), and a boundary indicator plate (4123) for indicating the workpiece mounting boundary. The rotating shaft (4121) is rotatably mounted on the mounting base (411) via the mounting base (4122). The boundary indicator plate (4123) is mounted on the top of the rotating shaft (4121). The transmission assembly (414) includes a synchronous belt (4141), a driving synchronous belt pulley (4142), a driven synchronous belt pulley (4143), a pressure belt pulley (4144), a driving gear (4145), a driven gear (4146), and a driven gear shaft (4147). The driving gear (4145) is coaxially mounted on the output part of the driving device (415). Several wheels (4146) are provided and are rotatably mounted on the mounting base (411) through their respective driven gear shafts (4147). Several driven gears (4146) are connected to the driving gear (4145) for transmission. Each driven gear shaft (4147) is coaxially mounted with a driving synchronous pulley (4142). Several driven synchronous pulleys (4143) are provided and are coaxially mounted on their respective rotating shafts (4121). The driving synchronous pulleys (4142) and the corresponding driven synchronous pulleys (4143) are connected by a synchronous belt (4141) for transmission. The pressure pulley (4144) is arranged on one side of the synchronous belt (4141) and abuts against the synchronous belt (4141) to adjust the tension of the synchronous belt (4141).

4. A continuous photocuring oven with integrated heating and post-curing treatment according to claim 2, characterized in that: The swing assembly (413) includes a swing bracket (4131), a mounting fixture (4132), and a damping adjustment assembly (4133). The swing bracket (4131) has hollowed-out mounting ears (41311) protruding upwards on both sides. The mounting fixture (4132) is rotatably arranged between the two mounting ears (41311). The mounting fixture (4132) is rotatably connected to the mounting ears (41311) with damping through the damping adjustment assembly (4133). The damping magnitude of the damping adjustment assembly (4133) is set to be adjustable.

5. A continuous photocuring oven with integrated heating and post-curing treatment according to claim 1, characterized in that: The heating mechanism (2) includes several sets of heating tubes (21). The several sets of heating tubes (21) are arranged sequentially in the light curing oven body (5) along the direction of workpiece movement and are located above the heat preservation space. A baffle (51) is provided between the heating tubes (21) and the heat preservation space. A circulation window (511) is provided at the edge of the baffle (51) through which the heating air can pass smoothly. The hot air input end of the hot air circulation mechanism (3) is connected to the air path of the heating mechanism (2) through the circulation window (511).

6. A continuous photocuring oven with integrated heating and post-curing treatment according to claim 5, characterized in that: Several heating tubes (21) in several groups of heating tubes (21) are arranged sequentially along the direction of hot air circulation. Each heating tube (21) is provided with several heat dissipation fins (211) to improve heat exchange efficiency. The gaps between the heat dissipation fins (211) are maintained to allow hot air to circulate. The gaps are arranged to extend along the direction of hot air circulation.

7. A continuous photocuring oven with integrated heat-curing treatment according to claim 1, characterized in that: It also includes a pressure-holding mechanism (6) for regulating the air pressure in the heat-insulating space. The pressure-holding mechanism (6) includes a gas collecting hood (61), a multi-bladed impeller (62), and a pressure-holding drive device (63). The gas collecting hood (61) is installed inside the light curing oven body (5). The air inlet of the gas collecting hood (61) is arranged at the end of the hot air circulation path inside the light curing oven body (5). The air outlet of the gas collecting hood (61) is connected to the first end of the hot air circulation path inside the light curing oven body (5). The multi-bladed impeller (62) is rotatably installed at the air outlet of the gas collecting hood (61) and is connected to the output part of the pressure-holding drive device (63). The multi-bladed impeller (62) drives the air flow under the drive of the pressure-holding drive device (63) to regulate the air pressure in the heat-insulating space.

8. A continuous photocuring oven with integrated heat-curing treatment according to claim 7, characterized in that: It also includes a protective gas supply mechanism (7) for supplying protective gas. The output part of the protective gas supply mechanism (7) is connected to the gas path of the gas collection hood (61) and supplies protective gas into the light curing oven body (5) according to preset control parameters.

9. A continuous photocuring oven with integrated heat-curing treatment according to claim 1, characterized in that: It also includes an exhaust mechanism (8) for discharging waste gas, wherein the air inlet of the exhaust mechanism (8) is connected to the end of the hot air circulation path inside the light curing oven body (5), and the waste gas is discharged when the air in the heat preservation space deteriorates.

10. A continuous photocuring oven with integrated heat-curing treatment according to claim 1, characterized in that: The hot air circulation mechanism (3) includes several circulating fans (31), a fan mounting plate (32), and an angle adjustment mechanism (33). The fan mounting plate (32) is installed at an adjustable angle on one side of the heat preservation space. Several openings for hot air to pass through are provided on the fan mounting plate (32). Several circulating fans (31) are installed on their respective openings. Several angle adjustment mechanisms (33) are provided and are fixedly installed inside the light curing oven body (5). The angle adjustment parts of several angle adjustment mechanisms (33) are respectively connected to the corresponding parts of the edge of the fan mounting plate (32). The fan mounting plate (32) swings under the drive of the angle adjustment mechanism (33) to adjust the direction of hot air flow.

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