A stepwise ultraviolet light intensity coating curing device and an adjusting method thereof

Abstract

The application relates to a step-type ultraviolet light intensity coating curing device and an adjusting method thereof, which comprises a pre-curing device and two strong curing devices, the pre-curing device and the two strong curing devices are distributed along the conveying direction of materials, the pre-curing device comprises a pre-curing box and two groups of pre-curing ultraviolet light groups, the two groups of pre-curing ultraviolet light groups are respectively located on the two opposite surfaces of the materials, the pre-curing ultraviolet light groups are arranged in the pre-curing box, the strong curing device comprises a strong curing box, two mounting frames, a plurality of strong curing light groups and an adjusting assembly, the two mounting frames are respectively corresponding to the two surfaces of the materials, the mounting frames are slidably connected in the strong curing box along the vertical direction, the plurality of strong curing light groups are distributed along the conveying direction of the materials, the strong curing light groups are arranged on the mounting frames, and the adjusting assembly is used for changing the distance between the mounting frames and the materials. The application has the effects of improving the ultraviolet light curing effect and improving the product quality and the yield.

Description

Technical Field

[0001] This application relates to the field of ultraviolet curing, and in particular to a coating curing apparatus and method for adjusting stepped ultraviolet light intensity. Background Technology

[0002] Ultraviolet (UV) curing, with its advantages of fast curing speed, solvent-free emissions, low energy consumption, and compatibility with continuous roll-to-roll production, is widely used in surface coating processes for optical films, functional tapes, and electronic materials. Current coating curing processes generally employ a single, fixed-intensity UV light source to cure the wet coating in a single, complete irradiation. Specifically, after the substrate is coated by the coating head, it is directly immersed in an irradiation area with a single or a group of UV lamps whose power and intensity are not adjustable. High-energy UV light initiates the complete polymerization and cross-linking of the coating's photoinitiator in a single step.

[0003] Most mainstream UV curing devices on the market currently use a fixed lamp assembly structure, with the UV lamps installed in a fixed position, and the vertical distance between the lamps and the material to be cured cannot be adjusted. The equipment can only change the total light energy by replacing lamps with different wattages or increasing or decreasing the number of lamps. The light intensity regulation is simple and crude, with a large adjustment range, making it difficult to achieve fine control. The equipment has a narrow range of adaptability when dealing with various specifications of coating products.

[0004] High-energy ultraviolet light instantaneous irradiation causes rapid polymerization and solidification of the coating surface, resulting in a sharp volume shrinkage. However, the cross-linking reaction has not yet occurred in the coating interior in time. The inconsistent curing rates between the inside and outside will generate significant internal shrinkage stress, which can easily lead to appearance and performance defects such as cracking, wrinkling, orange peel texture, and even delamination between the coating and the substrate. Furthermore, wet coatings often contain microbubbles. Instantaneous high-intensity ultraviolet light will cause the coating surface to quickly form a film and seal it. The bubbles cannot escape naturally in the low viscosity state of the coating and will eventually be trapped inside the coating, which will seriously reduce the product's light transmittance, smoothness, and dielectric properties, and fail to meet the high-precision requirements of optical and electronic materials. Summary of the Invention

[0005] To improve the effect of ultraviolet light curing and increase product quality and yield, this application provides a coating curing device with stepped ultraviolet light intensity and a method for adjusting it.

[0006] On the one hand, the step-type ultraviolet light intensity coating and curing device provided in this application adopts the following technical solution: A stepped ultraviolet light intensity coating curing device includes a pre-curing device and two strong curing devices, which are distributed along the material transport direction. The pre-curing device includes a pre-curing box and two sets of pre-curing ultraviolet lamps, which are respectively located on two opposite sides of the material and are housed inside the pre-curing box. The strong curing device includes a strong curing box, two mounting frames, several strong curing lamps, and an adjustment component. The two mounting frames are respectively located on two opposite sides of the material and are vertically slidably connected to the strong curing box. The several strong curing lamps are distributed along the material transport direction and are mounted on the mounting frames. The adjustment component is used to change the distance between the mounting frames and the material.

[0007] By adopting the above technical solution, a three-stage stepped curing system is constructed by sequentially arranging a pre-curing device and two strong curing devices along the material transport direction. This system can form a continuously increasing distribution of ultraviolet light intensity from weak to strong along the transport direction, allowing the coating to first undergo gentle pre-curing and then gradually complete deep curing. This effectively avoids the problem of inconsistent curing rates between the inside and outside of the coating caused by instantaneous high-energy ultraviolet light irradiation, significantly reduces the generation of shrinkage stress, and prevents defects such as coating cracking, wrinkling, orange peel texture, and delamination from the substrate from the source. At the same time, the use of two sets of pre-curing ultraviolet lamps at the top and bottom enables simultaneous pre-curing of both sides of the material, solving the problem of delayed curing of the other side of the coating when curing one side, and ensuring the consistency of the curing effect of the coating on both sides. With the installation frame and adjustment components that can slide vertically, the vertical distance between the strong curing lamps and the material can be flexibly adjusted, achieving a wide range of continuous adjustment of light intensity. It can adapt to coatings of different thicknesses and formulations and different production line operating speeds without changing lamp tubes or increasing or decreasing the number of lamps, significantly expanding the process adaptability range of the equipment.

[0008] Optionally, the adjustment assembly includes a bidirectional screw and an adjustment motor. The bidirectional screw is vertically arranged and rotatably connected to the curing chamber. Two mounting frames are threadedly connected to the opposite threaded sections of the bidirectional screw. The adjustment motor is used to drive the bidirectional screw to rotate.

[0009] By adopting the above technical solution, a bidirectional screw and adjusting motor are used as the adjustment components. The two opposing threads of the bidirectional screw drive the two mounting frames on the upper and lower sides of the material to slide vertically in opposite directions simultaneously. This ensures that the vertical distance between the upper and lower curing lamps and the material surface remains completely consistent, completely avoiding the problems of uneven curing effects, over-curing on one side and under-curing on the other, caused by different lamp distances on both sides. This transmission structure provides a smooth and precise adjustment process, with an adjustment accuracy down to the millimeter level. Only one drive motor is needed to simultaneously adjust the distance between the lamps on both sides, eliminating the need for separate drive and adjustment mechanisms. This significantly simplifies the equipment structure, reduces manufacturing costs and maintenance difficulty, and significantly improves the efficiency and consistency of light intensity adjustment.

[0010] Optionally, the mounting frame includes a base frame and a rotating frame. The base frame is slidably connected to the curing box in a vertical direction. The curing box is provided with a driving component for adjusting the angle of the rotating frame. One end of the rotating frame is rotatably connected to the base frame. The curing lamp assembly includes a sliding seat, a lamp holder, and a lamp tube. The sliding seat is slidably connected to the rotating frame along the length of the rotating frame. The lamp holder is disposed on the sliding seat, and the lamp tube is disposed on the lamp holder.

[0011] By adopting the above technical solution, the mounting frame is designed as a separate combination structure of the base frame and the rotating frame. With the help of the drive components, the overall deflection angle of the rotating frame can be flexibly adjusted. Simultaneously, a sliding high-curing lamp assembly design along the length of the rotating frame allows for simultaneous adjustment of the overall illumination angle of the lamp assembly and independent adjustment of the spacing between adjacent lamp assemblies. Adjusting the angle of the rotating frame changes the overall illumination range of the lamp assembly, adapting to the curing requirements of substrates with different widths. By sliding and adjusting the position of each high-curing lamp assembly, the spatial distribution of light intensity can be flexibly adjusted according to the curing process requirements. For example, the lamp spacing can be appropriately increased at the front end of the high-curing zone to create a smooth light intensity transition, while the lamp spacing can be decreased at the rear end to increase local light intensity and achieve deep curing. This design further improves illumination uniformity and process flexibility, meeting the personalized curing needs of various complex coating products.

[0012] Optionally, the driving component includes a driving screw, a sliding block, two adapter blocks, two limiting blocks, and a driving motor. The driving screw is horizontally positioned and rotatably connected to the curing chamber. The driving motor drives the driving screw to rotate. The sliding block is slidably connected to the curing chamber along the length of the driving screw and is threadedly connected to the driving screw. The two adapter blocks correspond to two base frames and are slidably connected to the sliding block along the vertical direction and along the length of the base frame. Each adapter block has a sliding groove, the extension direction of which is in the same plane as the sliding direction of the adapter block, and the sliding groove is inclined. The two limiting blocks correspond to two rotating frames respectively and are positioned on the rotating frames, within the sliding grooves of the adapter blocks.

[0013] By adopting the above technical solution, through the cooperative transmission structure of the drive screw, sliding block, adapter block, and limiting block, the horizontal rotational motion of the drive screw can be converted into the deflection motion of the rotating frame. Only one drive motor is needed to simultaneously drive the two rotating frames on the upper and lower sides of the material to achieve synchronous angle adjustment, ensuring the consistency of the illumination angle of the lamps on the upper and lower sides. This transmission structure utilizes the inclined sliding groove on the adapter block and the limiting cooperation of the limiting block to achieve precise linear angle adjustment. The adjustment accuracy is high and the transmission is smooth and reliable. There is no need to set up multiple independent angle drive mechanisms, which greatly simplifies the transmission system of the equipment, reduces structural complexity and manufacturing costs, reduces failure points, and improves the stability and reliability of equipment operation.

[0014] Optionally, the curing lamp assembly also includes a roller assembly, which is disposed on the sliding seat and slidably connected to the rotating frame.

[0015] By adopting the above technical solution, a roller assembly is set between the sliding seat and the rotating frame, which transforms the sliding friction between the sliding seat and the rotating frame into rolling friction. This significantly reduces the frictional resistance between the two, making the adjustment of the spacing between the hardened lamp groups smoother and less labor-intensive. Even under conditions of frequent lamp group position adjustments, the ease of operation is guaranteed. At the same time, the roller assembly effectively reduces the wear on the contact surfaces between the sliding seat and the rotating frame, extends the service life of the components, and avoids problems such as increased clearance and decreased adjustment accuracy caused by long-term wear, thus ensuring the long-term accuracy and stability of the lamp group position adjustment.

[0016] Optionally, the strong curing lamp assembly further includes a limiting block, which is disposed on the lamp holder, the lamp holder is rotatably connected to the sliding seat, and the limiting block is slidably connected to the base frame in the vertical direction.

[0017] By adopting the above technical solution, the lamp holder, which is rotatably connected to the sliding seat, in conjunction with the limiting block structure, ensures that the lamp tube always remains vertically downward, illuminating the material surface, regardless of any adjustment state. When the rotating frame deflects and the sliding seat moves along the rotating frame, the limiting block, through its vertical sliding cooperation with the base frame, precisely constrains the rotation angle of the lamp holder, automatically corrects the lamp holder's posture, and counteracts the angle changes caused by the deflection of the rotating frame and the movement of the sliding seat. This ensures that the lamp tube is always perpendicular to the coating surface, guaranteeing the uniformity of the curing effect across the entire width and effectively reducing product color differences and performance variations caused by changes in the illumination angle.

[0018] Optionally, the lamp holder is further provided with a lampshade assembly, which includes two lampshade pieces and a follower. The two lampshade pieces are located on both sides of the lamp tube, and the lampshade pieces are rotatably connected to the base frame. The follower is used to drive the lampshade pieces to rotate.

[0019] By adopting the above technical solution, a lampshade assembly consisting of two rotatable lampshade plates and a follower is installed on the lamp holder. The synchronous rotation of the lampshade plates allows for flexible adjustment of the focusing angle and shading range, achieving precise control of ultraviolet light intensity. When the lampshade plates rotate inward, the spot size is reduced and the local light intensity is increased, suitable for deep curing areas requiring high energy density. When the lampshade plates rotate outward, the spot size is expanded and the light intensity is reduced, suitable for pre-curing or transition areas requiring uniform irradiation. This design effectively improves the utilization rate of ultraviolet light energy, reduces light scattering and leakage, and allows for flexible adjustment of the spot size and light intensity distribution according to different curing requirements, further enhancing the equipment's process adaptability.

[0020] Optionally, the follower includes two racks and two gears. The two racks correspond to two lampshade pieces respectively. The racks are vertically arranged and mounted on the lamp holder. The two gears correspond to two lampshade pieces and are mounted on the lampshade pieces. The gears and racks are in a meshing state.

[0021] By adopting the above technical solution and using a rack and pinion meshing follower structure, the lamp holder can automatically drive the lamp cover to rotate synchronously with the displacement of the sliding seat. There is no need to set up an independent drive device and control mechanism for the lamp cover assembly. The structure is simple and compact, and the linkage response is fast and reliable. When adjusting the arrangement spacing of the high-curing lamp group, the lamp holder drives the rack to move vertically, and automatically drives the lamp cover on both sides to rotate to the corresponding angle through gear meshing transmission. This realizes the synchronous linkage of lamp group spacing adjustment and focusing range adjustment, which greatly improves the automation of light intensity adjustment, avoids the tedious operation of manually adjusting the lamp cover separately, and ensures the precise matching of lamp group position and focusing angle.

[0022] Optionally, both the pre-curing chamber and the hard curing chamber are equipped with exhaust fans.

[0023] By adopting the above technical solution, exhaust fans are installed in both the pre-curing and hard curing chambers, which can efficiently and in real time remove the large amount of heat generated during lamp operation and the ozone gas produced by photochemical reactions. Continuous exhaust maintains a slight negative pressure and constant temperature within the curing chamber, preventing defects such as thermal shrinkage and deformation of the flexible substrate, and blistering and wrinkling of the coating caused by continuous temperature increases within the chamber. Simultaneously, the low-temperature environment effectively slows down the aging process of the lamps, extending their lifespan. Furthermore, timely ozone removal prevents corrosion of internal equipment components and avoids ozone leakage into the production environment, thus improving the safety of the production environment.

[0024] On the other hand, the coating curing equipment adjustment method provided in this application, which uses the above-mentioned stepped ultraviolet light intensity coating curing device to cure materials, includes the following steps: S1: The material to be cured passes through the pre-curing device and two strong curing devices in sequence. The upper and lower light groups in the pre-curing box use a low intensity of 50-100mW / cm² to pre-polymerize and activate the material on both sides at a low speed, so that the coating is initially dried to form a network structure, releasing stress and removing bubbles. S2: Start the adjustment motor to drive the bidirectional screw to rotate, causing the upper and lower mounting frames to slide vertically in sync, adjusting the vertical distance between the strong curing lamp group and the material, controlling the light intensity of the strong curing base at 100-500mW / cm², and completing the coarse adjustment of the light intensity; S3: Rotating the drive screw drives the sliding block to move horizontally. Through the cooperation of the adapter block sliding groove and the limiting block, the rotating frame is driven to deflect relative to the base frame. The lamp holder follows and adaptively corrects itself to keep the lamp tube always illuminating vertically. S4: Slide each sliding seat along the rotating frame to adjust the spacing between adjacent strong curing lamp groups, and at the same time rotate the lamp seat to fine-tune the irradiation angle of the single tube so that the light can evenly cover the width of the material. S5: When the lamp holder moves with the sliding seat, it drives the rack to move, and through gear meshing, it drives the lamp cover to rotate synchronously, changing the focusing angle and the shading range to complete the fine adjustment of light intensity, so that the pre-cured light intensity is 20%-50% of the strong curing light intensity, forming a stepped increasing light environment. S6: Simultaneously turn on the exhaust fans in each chamber to expel heat and ozone, and maintain a slight negative pressure and constant temperature in the chamber; in the strong curing stage, use high light intensity to generate heat to initiate the polymerization of the thermal initiator in the coating, realize photothermal synergistic curing, and complete the continuous and progressive curing of the material.

[0025] By adopting the above technical solution, a stepped curing process of low-intensity prepolymerization activation followed by high-intensity deep curing, combined with a core design that ensures the high-curing lamp group always maintains vertical illumination, and multi-dimensional light intensity adjustment methods such as height coarse adjustment, lamp group spacing fine adjustment, and lamp cover follow-up fine adjustment, it is possible to accurately control the pre-curing light intensity to 50-100mW / cm², the high-curing base light intensity to 100-500mW / cm², and the pre-curing light intensity to be 20%-50% of the high-curing light intensity, forming a scientific and reasonable stepped lighting environment. In the pre-curing stage, low-intensity ultraviolet light only induces a preliminary reaction in the coating photoinitiator, causing the coating surface to form a network structure but not fully cross-linked. This allows microbubbles inside the coating to escape fully under low viscosity conditions, while simultaneously causing the coating to slowly shrink initially, gradually releasing internal stress. This fundamentally solves the problems of bubble residue and stress cracking in existing technologies. In the strong curing stage, the consistently vertical irradiation method ensures uniform light intensity distribution and maximum energy utilization. High-intensity ultraviolet light provides sufficient energy for the coating to complete overall deep polymerization. At the same time, the heat generated by the high light intensity induces the polymerization reaction of the thermal initiator added to the coating, achieving a synergistic effect of photocuring and thermal curing. This effectively solves the problem of incomplete curing in dark films and thick coatings, significantly improving the adhesion between the coating and the substrate and the overall mechanical properties of the product. This method has highly controllable process parameters, can be adapted to various coating formulations and production speeds, and greatly improves production efficiency and product yield, especially suitable for optical films and electronic functional materials.

[0026] In summary, this application includes at least one of the following beneficial technical effects: By limiting the lamp holder posture with limiting blocks, the lamp tube is kept vertically irradiating the coating throughout the entire process of adjusting the height, angle and spacing. This results in high light energy utilization, good curing uniformity, and continuous adjustment of light intensity through multi-mechanism linkage. The equipment's process adaptability to different coating products is greatly improved. By adopting a stepped UV curing layout with weak light first and then strong light later along the material conveying direction, and with a parameter ratio of 50-100mW / cm² pre-curing light intensity and 100-500mW / cm² strong curing light intensity, the coating prepolymerization and deep curing can be completed smoothly, effectively releasing the internal stress of the coating, expelling internal air bubbles, avoiding coating cracking, wrinkling and air bubble residue defects, and improving the adhesion performance between the coating and the substrate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a coating and curing device with stepped ultraviolet light intensity.

[0028] Figure 2 yes Figure 1 A schematic diagram of the pre-curing device.

[0029] Figure 3yes Figure 1 Schematic diagram of the medium-strength curing device.

[0030] Figure 4 yes Figure 3 A schematic diagram of the structure of the adjustment component.

[0031] Figure 5 yes Figure 3 Schematic diagram of the structure of the medium-intensity curing lamp assembly.

[0032] Figure 6 yes Figure 5 A schematic diagram of the structure of the central lampshade assembly.

[0033] Reference numerals: 1. Pre-curing device; 11. Pre-curing box; 12. Pre-curing UV lamp assembly; 2. Strong curing device; 21. Strong curing box; 22. Mounting frame; 221. Base frame; 222. Rotating frame; 223. Limiting groove; 23. Strong curing lamp assembly; 231. Sliding seat; 232. Lamp holder; 233. Lamp tube; 234. Roller assembly; 235. Limiting block; 24. Adjustment assembly; 241. Bidirectional screw; 242. Adjustment motor; 243. Sliding rod; 3. Exhaust fan; 4. Driving component; 41. Driving screw; 42. Sliding block; 43. Adaptor block; 44. Limiting block; 45. Driving motor; 46. Sliding groove; 5. Lamp cover assembly; 51. Lamp cover sheet; 52. Follower component; 521. Rack; 522. Gear. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail.

[0035] This application discloses a coating and curing apparatus with stepped ultraviolet light intensity. (Refer to...) Figure 1 A stepped ultraviolet light intensity coating curing device includes a pre-curing device 1 and two strong curing devices 2. The pre-curing device 1 and the two strong curing devices 2 are distributed along the material transport direction. The pre-curing device 1 includes a pre-curing box 11 and two sets of pre-curing ultraviolet light groups 12. The two sets of pre-curing ultraviolet light groups are distributed vertically. The two sets of pre-curing ultraviolet light groups 12 are respectively opposite to the two sides of the material. The pre-curing ultraviolet light groups 12 are fixedly installed on the inner side wall of the pre-curing box 11.

[0036] The curing device 2 includes a curing box 21, two mounting frames 22, several curing lamps 23, and an adjustment assembly 24. Both the pre-curing box 11 and the curing box 21 are equipped with exhaust fans 3 for ventilation. The two mounting frames 22 are vertically distributed and include a base frame 221 and a rotating frame 222. The base frame 221 is horizontally positioned and slidably connected to the curing box 21 vertically. The adjustment assembly 24 includes a bidirectional screw 241, an adjustment motor 242, and a sliding rod 24. 3. The sliding rod 243 is set vertically and fixedly installed inside the curing box 21. Two mounting frames 22 slide vertically and are connected to the sliding rod 243. The bidirectional screw 241 is parallel to the length direction of the sliding rod 243 and is rotatably connected inside the curing box 21. Two base frames 221 are threadedly connected to the threaded sections of the bidirectional screw 241 with opposite directions of rotation. The adjusting motor 242 is fixedly installed on the curing box 21, and the output shaft of the adjusting motor 242 is fixedly connected to one end of the bidirectional screw 241.

[0037] The end of the rotating frame 222 furthest from the pre-curing device 1 is rotatably connected to the base frame 221. A driving component 4 for adjusting the angle of the rotating frame 222 is provided on the curing chamber 21. The driving component 4 includes a driving screw 41, a sliding block 42, two adapter blocks 43, two limiting blocks 44, and a driving motor 45. The length direction of the driving screw 41 is parallel to the length direction of the curing chamber 21, and the driving screw 41 is rotatably connected to the inner wall of the curing chamber 21. The sliding block 42 slides along the length direction of the driving screw 41 and is threaded onto the driving screw 41. The output shaft of the driving motor 45 is connected to the driving screw 41. One end is fixedly connected, and two adapter blocks 43 correspond to two base frames 221. The adapter blocks 43 are slidably connected to the sliding blocks 42 in the vertical direction and to the base frames 221 in the length direction of the drive screw 41. The adapter blocks 43 are provided with sliding grooves 46. The extension direction of the sliding grooves 46 and the sliding direction of the adapter blocks 43 are in the same plane. The angle between the extension direction of the sliding grooves 46 and the sliding direction of the adapter blocks 43 is 45°. Two limiting blocks 44 correspond to two rotating frames 222. The limiting blocks 44 are fixedly set on the rotating frames 222 and are located in the sliding grooves 46 of the corresponding adapter blocks 43.

[0038] Several curing lamp units 23 are distributed along the material transport direction. Each curing lamp unit 23 includes a sliding seat 231, a lamp holder 232, a lamp tube 233, a roller assembly 234, and a limiting block 235. The sliding seat 231 is slidably connected to the rotating frame 222 along the length of the rotating frame 222. The roller assembly 234 is fixedly installed on the sliding seat 231, and the rollers on the roller assembly 234 are rotatably connected to the rotating frame 222. The lamp holder 232 is rotatably connected to the lower end face of the sliding seat 231. The rotation axis of the lamp holder 232 is parallel to the width direction of the curing box 21. The lamp tube 233 is fixedly installed on the lamp holder 232. The limiting block 235 is fixedly installed on the lamp holder 232. A limiting groove 223 is provided on the base frame 221. The limiting groove 223 extends vertically, and the limiting block 235 is located within the limiting groove 223.

[0039] A lampshade assembly 5 is provided on the lamp holder 232. The lampshade assembly 5 includes two lampshade pieces 51 and a follower 52. The two lampshade pieces 51 are located on both sides of the lamp tube 233. The lampshade pieces 51 are rotatably connected to the base frame 221. The rotation axis of the lampshade pieces 51 is parallel to the width direction of the curing box 21. The follower 52 includes two racks 521 and two gears 522. The two racks 521 correspond to the two lampshade pieces 51 respectively. The racks 521 are vertically arranged and fixedly arranged on the lamp holder 232. The two gears 522 correspond to the two lampshade pieces 51 and are fixedly arranged on the lampshade pieces 51. The gears 522 are in a meshing state with the corresponding racks 521.

[0040] The implementation principle of the step-type ultraviolet light intensity coating curing device in this application embodiment is as follows: a three-level step-type curing system is constructed by a pre-curing device 1 and two strong curing devices 2 arranged sequentially along the material transport direction. Two sets of pre-curing ultraviolet lamp groups 12 arranged symmetrically in the pre-curing box 11 provide low-intensity ultraviolet light to simultaneously and slowly prepolymerize and activate both sides of the material. This only triggers the initial reaction of the photoinitiator in the coating, causing the surface of the coating to form a network structure but not completely cross-linked. This allows the micro bubbles inside the coating to escape fully in a low viscosity state. At the same time, the internal stress is gradually released through slow initial shrinkage, laying the foundation for subsequent deep curing.

[0041] The curing device 2 achieves a wide range of coarse adjustment of light intensity through the adjustment component 24. The bidirectional screw 241 uses its two threads with opposite directions to drive the upper and lower base frames 221 to slide vertically in opposite directions along the sliding rod 243, uniformly adjusting the vertical distance between the upper and lower curing lamp groups 23 and the material surface. The sliding rod 243 provides precise guidance for the lifting and lowering movement of the base frame 221, ensuring the synchronicity and stability of the movement of the upper and lower frames.

[0042] The driving component 4 achieves angle adjustment of the rotating frame 222 through mechanical linkage. When the driving screw 41 rotates, it can drive the sliding block 42 to move horizontally along its length. The sliding block 42 drives the two adapter blocks 43 to move horizontally synchronously. Through the limiting cooperation between the sliding groove 46 set at 45° on the adapter block 43 and the limiting block 44 on the rotating frame 222, the horizontal linear motion is converted into the deflection motion of the rotating frame 222 around its hinge point with the base frame 221, realizing the synchronous angle adjustment of the upper and lower rotating frames 222. During this process, the lamp holder 232 cooperates with the vertically extending limiting groove 223 on the base frame 221 through the limiting block 235. The limiting block 235 can only slide in the vertical direction of the limiting groove 223, thereby forming a forced constraint on the rotation angle of the lamp holder 232, automatically offsetting the angle change caused by the deflection of the rotating frame 222, so that the lamp tube 233 always keeps vertically downward to irradiate the material surface, completely avoiding uneven light intensity distribution and energy loss caused by the irradiation angle deviation.

[0043] The high-intensity curing lamp assembly 23 can slide along the length of the rotating frame 222 to adjust the spacing between adjacent lamp assemblies. The roller assembly 234 between the sliding seat 231 and the rotating frame 222 converts sliding friction into rolling friction, reducing adjustment resistance. When the sliding seat 231 moves, the lamp holder 232 moves synchronously with it, and the rack 521 on the lamp holder 232 moves vertically accordingly. Through meshing transmission with the gear 522, it automatically drives the lamp cover 51 on both sides of the lamp tube 233 to rotate synchronously, changing the opening and closing angle of the lamp cover 51, thereby adjusting the focusing range and the shading area, realizing the fine control of ultraviolet light intensity, and forming a stepped lighting environment with gradually increasing light intensity along the material transportation direction.

[0044] During the strong curing stage, high-intensity ultraviolet light provides sufficient energy for the coating to complete the overall deep polymerization; the exhaust fan 3 in the pre-curing box 11 and the strong curing box 21 exhausts the heat and ozone generated by the lamp tube 233 in real time, maintains the slight negative pressure and constant temperature in the curing chamber, prevents the substrate from deforming due to heat and the coating from deteriorating, and finally completes the continuous and progressive high-quality curing of the material.

[0045] This application also discloses a method for adjusting a coating curing device. The material curing operation using the above-mentioned stepped ultraviolet light intensity coating curing device includes the following steps: S1: The material to be cured passes through the pre-curing device 1 and two strong curing devices 2 in sequence. The upper and lower lamp groups in the pre-curing box 11 perform low-speed prepolymerization activation on both sides of the material at a low intensity of 50-100mW / cm², so that the coating is initially surface-dried to form a network structure, releasing stress and removing bubbles. S2: Start the adjustment motor 242 to drive the bidirectional screw 241 to rotate, which drives the upper and lower mounting frames 22 to slide vertically in sync, adjust the vertical distance between the strong curing lamp group 23 and the material, and control the light intensity of the strong curing base at 100-500mW / cm² to complete the coarse adjustment of the light intensity; S3: Rotating the drive screw 41 drives the sliding block 42 to move horizontally. Through the cooperation of the sliding groove 46 of the adapter block 43 and the limiting block 44, the rotating frame 222 is driven to deflect relative to the base frame 221. The lamp holder 232 follows and adaptively corrects itself to keep the lamp tube 233 always illuminating vertically. S4: Slide each sliding seat 231 along the rotating frame 222 to adjust the spacing between adjacent strong curing lamp groups 23, and at the same time rotate the lamp seat 232 to fine-tune the single tube irradiation angle so that the light covers the material width evenly. S5: When the lamp holder 232 moves with the sliding seat 231, it drives the rack 521 to move. Through the meshing of the gear 522, the lamp cover 51 rotates synchronously, changing the focusing angle and the shading range to complete the fine adjustment of light intensity, so that the pre-cured light intensity is 20%-50% of the strong curing light intensity, forming a stepped increasing light environment. S6: Simultaneously turn on the exhaust fan 3 in each chamber to expel heat and ozone, and maintain a slight negative pressure and constant temperature in the chamber; in the strong curing stage, use high light intensity to generate heat to initiate the polymerization of the thermal initiator in the coating, realize photothermal synergistic curing, and complete the continuous and progressive curing of the material.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A coating and curing device with stepped ultraviolet light intensity, characterized in that: The device includes a pre-curing device (1) and two strong curing devices (2), which are distributed along the transport direction of the material. The pre-curing device (1) includes a pre-curing box (11) and two sets of pre-curing UV lamps (12). The two sets of pre-curing UV lamps (12) are located on opposite sides of the material. The pre-curing UV lamps (12) are set inside the pre-curing box (11). The strong curing device (2) includes a strong curing box (21), two mounting frames (22), several strong curing lamps (23), and an adjustment component (24). The two mounting frames (22) are opposite to opposite sides of the material. The mounting frames slide vertically and are connected to the strong curing box (21). Several strong curing lamps (23) are distributed along the transport direction of the material. The strong curing lamps (23) are set on the mounting frames (22). The adjustment component (24) is used to change the distance between the mounting frames (22) and the material.

2. The coating and curing device with stepped ultraviolet light intensity according to claim 1, characterized in that: The adjustment assembly (24) includes a bidirectional screw (241) and an adjustment motor (242). The bidirectional screw (241) is vertically arranged and rotatably connected to the hardening box (21). Two mounting frames (22) are respectively threaded onto the threaded sections of the bidirectional screw (241) with opposite directions of rotation. The adjustment motor (242) is used to drive the bidirectional screw (241) to rotate.

3. The coating and curing device for stepped ultraviolet light intensity according to claim 2, characterized in that: The mounting frame (22) includes a base frame (221) and a rotating frame (222). The base frame (221) is slidably connected to the curing box (21) in the vertical direction. The curing box (21) is provided with a drive component (4) for adjusting the angle of the rotating frame (222). One end of the rotating frame (222) is rotatably connected to the base frame (221). The curing lamp assembly (23) includes a sliding seat (231), a lamp holder (232), and a lamp tube (233). The sliding seat (231) is slidably connected to the rotating frame (222) along the length direction of the rotating frame (222). The lamp holder (232) is set on the sliding seat (231), and the lamp tube (233) is set on the lamp holder (232).

4. The coating and curing device with stepped ultraviolet light intensity according to claim 3, characterized in that: The driving component (4) includes a driving screw (41), a sliding block (42), two adapter blocks (43), two limiting blocks (44), and a driving motor (45). The driving screw (41) is horizontally positioned and rotatably connected to the curing chamber (21). The driving motor (45) drives the driving screw (41) to rotate. The sliding block (42) slides along the length of the driving screw (41) and is slidably connected to the curing chamber (21). The sliding block (42) is threaded onto the driving screw (41). The two adapter blocks (43) correspond to the two base frames (221). The adapter block (43) is slidably connected to the sliding block (42) in the vertical direction. The adapter block (43) is slidably connected to the base frame (221) in the length direction of the base frame (221). The adapter block (43) is provided with a sliding groove (46). The extension direction of the sliding groove (46) and the sliding direction of the adapter block (43) are located in the same plane. The sliding groove (46) is inclined. Two limiting blocks (44) are respectively corresponding to two rotating frames (222). The limiting blocks (44) are set on the rotating frame (222). The limiting blocks (44) are located in the sliding groove (46) of the adapter block (43).

5. The coating and curing device with stepped ultraviolet light intensity according to claim 4, characterized in that: The strong curing lamp assembly (23) also includes a roller assembly (234), which is disposed on the sliding seat (231) and is slidably connected to the rotating frame (222).

6. The coating and curing device for stepped ultraviolet light intensity according to claim 5, characterized in that: The strong curing lamp assembly (23) also includes a limiting block (235), which is disposed on the lamp holder (232). The lamp holder (232) is rotatably connected to the sliding seat (231), and the limiting block (235) is slidably connected to the base frame (221) in the vertical direction.

7. The coating and curing device for stepped ultraviolet light intensity according to claim 6, characterized in that: The lamp holder (232) is also provided with a lampshade assembly (5), which includes two lampshade pieces (51) and a follower (52). The two lampshade pieces (51) are located on both sides of the lamp tube (233). The lampshade pieces (51) are rotatably connected to the base frame (221). The follower (52) is used to drive the lampshade pieces (51) to rotate.

8. The coating and curing device for stepped ultraviolet light intensity according to claim 7, characterized in that: The follower (52) includes two racks (521) and two gears (522). The two racks (521) correspond to the two lampshade pieces (51) respectively. The racks (521) are vertically arranged and are mounted on the lamp holder (232). The two gears (522) correspond to the two lampshade pieces (51) and are mounted on the lampshade pieces (51). The gears (522) and the racks (521) are in a meshing state.

9. The coating and curing device for stepped ultraviolet light intensity according to claim 8, characterized in that: Both the pre-curing box (11) and the strong curing box (21) are equipped with exhaust fans (3).

10. A method for adjusting a coating and curing equipment, characterized in that: The material curing operation using the stepped ultraviolet light intensity coating and curing device as described in claim 9 includes the following steps; S1: The material to be cured passes through the pre-curing device (1) and two strong curing devices (2) in sequence. The upper and lower lamp groups in the pre-curing box (11) perform low-speed prepolymerization activation on both sides of the material at a low intensity of 50-100mW / cm², so that the coating is initially dried to form a network structure, release stress and remove bubbles. S2: Start the adjustment motor (242) to drive the bidirectional screw (241) to rotate, which drives the upper and lower mounting frames (22) to slide vertically in sync, adjust the vertical distance between the strong curing lamp group (23) and the material, control the light intensity of the strong curing base at 100-500mW / cm², and complete the coarse adjustment of the light intensity; S3: Rotating the drive screw (41) drives the sliding block (42) to move horizontally. Through the cooperation of the adapter block (43) sliding groove (46) and the limiting block (44), the rotating frame (222) is driven to deflect relative to the base frame (221). The lamp holder (232) follows the adaptive correction to keep the lamp tube (233) always vertically illuminating. S4: Slide each sliding seat (231) along the rotating frame (222) to adjust the spacing between adjacent strong curing lamp groups (23), and at the same time rotate the lamp seat (232) to finely adjust the single tube irradiation angle so that the light covers the material width evenly; S5: When the lamp holder (232) moves with the sliding seat (231), it drives the rack (521) to move. Through the meshing of the gear (522), the lamp cover (51) rotates synchronously, changing the focusing angle and the shading range to complete the fine adjustment of light intensity, so that the pre-cured light intensity is 20%-50% of the strong curing light intensity, forming a stepped increasing light environment. S6: Simultaneously turn on the exhaust fan (3) in each box to discharge heat and ozone, maintain the cavity slightly negative pressure and constant temperature; in the strong curing stage, use high light intensity heat generation to initiate the polymerization of the thermal initiator in the coating, realize photothermal synergistic curing, and complete the continuous and progressive curing of the material.

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