Tunnel type UV curing oven

Abstract

The application discloses a tunnel type UV curing furnace, which comprises a furnace box, a conveying mechanism and a UV lamp curing mechanism. The UV lamp curing mechanism comprises a fixing frame and a plurality of groups of connecting plates. A plurality of groups of connecting plate sets are arranged on the fixing frame to install lamp source assemblies. Each group of connecting plate sets comprises two connecting plates, the connecting plates are provided with a vertical groove and a plurality of inclined transverse grooves, the plurality of inclined transverse grooves are arranged along the vertical direction and are in communication with the vertical groove, and the two ends of the lamp source assembly are fixed by penetrating the bolt into the inclined transverse groove to clamp the connecting plate. The structure can flexibly adjust the installation height, horizontal position, transverse irradiation inclination angle and longitudinal swing angle of the lamp source assembly, can accurately adapt to different workpiece shapes and coating thicknesses, realizes uniform and efficient curing, and is especially suitable for complex curved surface workpieces.

Description

Technical Field

[0001] This application relates to the technical field of spray curing equipment, and more specifically, to a tunnel UV curing oven. Background Technology

[0002] In industries such as spraying, printing, and coating, after workpieces are sprayed or coated with UV paints or inks, they need to be irradiated with ultraviolet (UV) light of a specific wavelength to trigger a chemical reaction in the photoinitiator in the coating, allowing the coating to cure and dry instantly. Compared with traditional hot air drying, UV curing has significant advantages such as high efficiency, low energy consumption, no solvent evaporation, and good curing quality. Among them, tunnel-type UV curing ovens have become an indispensable key piece of equipment in modern automated production because they can be integrated into production lines to achieve continuous and uninterrupted operation.

[0003] A typical tunnel-type UV curing oven usually consists of a closed or semi-closed tunnel-shaped chamber, which contains a UV lamp source and a conveyor mechanism for transporting workpieces. The workpieces pass through the tunnel with the conveyor mechanism and complete the curing process under the irradiation of the UV lamp source.

[0004] For workpieces of different shapes and sizes, as well as coatings of different formulations and thicknesses, there are different requirements for the optimal curing distance and irradiation angle. In related technologies, UV lamps are usually rigidly fixed inside the cabinet by a bracket. This fixed structure is difficult to cope with different curing requirements and has poor adaptability. Utility Model Content

[0005] In order to address the problem that the rigid fixed structure of the UV lamp assembly in the tunnel-type UV curing oven makes it difficult to meet different curing requirements in the related technology, this application provides a tunnel-type UV curing oven.

[0006] A tunnel-type UV curing oven includes an oven chamber with a conveying mechanism mounted on it. A UV lamp curing mechanism is mounted above the conveying mechanism. The UV lamp curing mechanism includes a lamp source assembly and a mounting frame. Multiple sets of connecting plates are fixed on the mounting frame. These sets of connecting plates are arranged along the conveying direction of the conveying mechanism, and the number of lamp source assemblies matches the number of connecting plate sets. Each set of connecting plates is connected to one lamp source assembly. Each set of connecting plates includes two symmetrically arranged parallel connecting plates, which are vertically positioned and connected to... On the fixing frame, the connecting piece is provided with a plurality of transverse inclined grooves. The transverse inclined grooves extend laterally and are inclined. The plurality of transverse inclined grooves are arranged in a vertical direction. One end of the lamp source assembly is inserted into the transverse inclined groove of one of the connecting pieces by a bolt to clamp the connecting piece. The other end of the lamp source assembly is inserted into the transverse inclined groove of another connecting piece by a bolt to clamp the connecting piece. The connecting piece is provided with a vertically extending vertical groove. One end of each of the plurality of transverse inclined grooves is connected to the vertical groove. The vertical groove allows the bolt to move within it.

[0007] Preferably, the lamp source assembly includes a lampshade and a UV lamp source disposed on the lampshade, and both ends of the lampshade are threadedly connected to the bolts.

[0008] Preferably, the UV lamp source includes one of a mercury lamp, a metal halide lamp, an LED-UV lamp, an electrodeless lamp, and a xenon lamp.

[0009] Preferably, the conveying mechanism is a belt conveyor.

[0010] Preferably, the top of the furnace box is equipped with a blower and an exhaust fan.

[0011] Preferably, the inclination angle of the transverse inclined groove is 10-30°.

[0012] The beneficial technical effects of this application are as follows:

[0013] By loosening the bolts and allowing them to slide up and down within the vertical groove, the installation height of the entire lamp source assembly can be quickly and continuously adjusted, thereby changing the curing distance between the UV lamp source and the workpiece to adapt to the curing energy requirements of coatings of different thicknesses. By loosening the bolts and allowing them to slide laterally within the horizontal groove, the horizontal position of the lamp source assembly can be adjusted. Because the horizontal groove is inclined, when the bolt slides within it, it simultaneously causes one end of the lamp source assembly to shift in both the horizontal and vertical directions. By independently adjusting the positions of the bolts at both ends of the lamp source assembly within their respective connecting plate grooves, the lateral irradiation angle of the lamp source assembly can be precisely changed. This is crucial for workpieces with complex three-dimensional curved surfaces, enabling the achievement of the optimal irradiation angle and avoiding shading and uneven curing. Thanks to the connection method where the bolts pass through the horizontal groove and clamp the connecting plates, the entire lamp source assembly can swing at a certain angle around the bolt as its axis when the bolt is not fully tightened. This design allows the lamp source assembly to not only adjust the lateral tilt angle but also adjust the longitudinal swing angle, so that the projection direction of the UV light can be precisely matched to the direction or specific shape of the workpiece on the conveyor belt. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a tunnel-type UV curing oven according to this embodiment.

[0015] Figure 2 This is a schematic diagram of the UV lamp curing mechanism in this embodiment.

[0016] Reference numerals: 1. Furnace box; 11. Bottom box; 12. Box cover; 121. Slot; 2. Conveying mechanism; 3. UV lamp curing mechanism; 31. Fixing frame; 32. Connecting plate assembly; 321. Connecting plate; 3211. Vertical slot; 3212. Horizontal inclined slot; 33. Lamp source assembly; 331. Lamp cover; 3311. Threaded hole; 332. UV lamp source; 4. Blower; 5. Exhaust fan. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Reference Figure 1-2A tunnel-type UV curing oven includes an oven box 1, a conveying mechanism 2, and a UV lamp curing mechanism 3. The oven box 1 adopts a modular design, including a base box 11 and a cover 12. The conveying mechanism 2 is a belt conveyor, which is horizontally installed on top of the base box 11 and serves as the core component for carrying and transporting workpieces. The cover 12 is like an inverted cover, completely covering the top and sides of the belt conveyor to form a closed curing tunnel. To ensure continuous entry and exit of workpieces, a through slot 121 is opened on each of the left and right side walls along the conveying direction, allowing the feed and discharge ends of the belt conveyor to pass smoothly through the cover 12, ensuring the airtightness of the tunnel while providing a smooth passage path for the workpieces.

[0019] Reference Figure 1-2 The UV lamp curing mechanism 3 includes a fixing frame 31, multiple sets of connecting plate groups 32, and a matching number of lamp source components 33. The fixing frame is fixed to the top of the inside of the housing 12. The multiple sets of connecting plate groups 32 are arranged at equal intervals along the conveying direction of the belt conveyor and also along the width direction of the belt conveyor. Each set of connecting plate groups 32 includes two parallel, symmetrical, and vertically installed connecting plates 321. Each connecting plate 321 is machined with a vertically extending vertical groove 3211 and several transverse inclined grooves 3212 communicating with the vertical groove 3211. The transverse inclined grooves 3212 extend laterally at an angle of 10 to 30 degrees and are evenly spaced in the vertical direction.

[0020] Reference Figure 1-2 The lamp source assembly 33 includes a lamp cover 331 and a UV lamp source 332 disposed on the lamp cover 331. Both ends of the lamp cover 331 are threaded with bolts. The UV lamp source 332 can be selected from one of mercury lamp, metal halide lamp, LED-UV lamp, electrodeless lamp, and xenon lamp.

[0021] Reference Figure 1-2 Each light source assembly 33 is connected and fixed to its corresponding connecting piece group 32 via bolts at both ends. Specifically, threaded holes 3311 are machined on the lamp covers 331 at both ends of the light source assembly 33, into which bolts are screwed. During installation, the shank of the bolt passes through the transverse inclined groove 3212 on a connecting piece 321 in sequence, and is locked on the other side by a nut, thereby clamping the connecting piece 321 between the lamp cover 331 and the nut. This design gives the light source assembly 33 flexible adjustment capabilities in three dimensions.

[0022] Reference Figure 1-2 When it is necessary to adjust the installation height of the lamp source assembly 33, simply loosen the bolts at both ends. At this time, the bolts can slide freely up and down in the vertical groove 3211, driving the entire lamp source assembly 33 to rise and fall, thereby precisely controlling the curing distance between the UV lamp source 332 and the surface of the workpiece below, so as to adapt to the curing energy requirements of different coating thicknesses.

[0023] Reference Figure 1-2 When it is necessary to adjust the horizontal position or lateral irradiation angle of the lamp source assembly 33, the transverse inclined groove 3212 is used. After loosening the bolt, the bolt can slide along the inclined transverse inclined groove 3212. Due to the guiding effect of the inclined groove, the movement of the bolt will simultaneously bring about a combined displacement in the horizontal and vertical directions. By independently adjusting the different positions of the bolts at both ends of the lamp source assembly 33 in the inclined grooves of their respective connecting pieces 321, one end of the lamp source assembly 33 can be raised and the other end lowered, or one end can be moved forward and the other end can be moved backward, thereby forming the required lateral tilt angle. This angle adjustment function is particularly important for irradiating workpieces with complex three-dimensional curved surfaces, enabling UV light to cover the workpiece surface at the optimal angle, effectively eliminating irradiation shadows, and ensuring uniform curing.

[0024] Reference Figure 1-2 Furthermore, thanks to the clamping connection between the bolt and the connecting piece 321, the entire lamp source assembly 33 can swing slightly longitudinally around the bolt as the axis even when the bolt is not fully locked. This allows the projection direction of the UV light to be tilted laterally and also adjusted in pitch along the conveying direction, thus perfectly matching the specific orientation or shape of the workpiece.

[0025] Reference Figure 1 A blower 4 and an exhaust fan 5 are also installed on the top of the enclosure 12. Both are connected to the internal space of the enclosure 12 and together form the airflow circulation system inside the furnace. The blower 4 is responsible for sending filtered clean air into the tunnel, which helps to maintain the curing environment and control the temperature; the exhaust fan 5 is responsible for timely exhausting any trace volatile substances or ozone that may be generated during the curing process, ensuring a safe working environment.

[0026] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tunnel-type UV curing oven, characterized in that: The system includes an oven box, on which a conveying mechanism is mounted, and above the conveying mechanism is a UV lamp curing mechanism. The UV lamp curing mechanism includes a lamp source assembly and a mounting frame. Multiple sets of connecting plates are fixed to the mounting frame. These sets of connecting plates are arranged along the conveying direction of the conveying mechanism, and the number of lamp source assemblies matches the number of connecting plate sets. Each set of connecting plates is connected to one lamp source assembly, and each set includes two symmetrically arranged parallel connecting plates. The connecting plates are vertically positioned and connected to the mounting frame. The connecting piece is provided with a plurality of transverse inclined grooves, which extend laterally and are inclined. The plurality of transverse inclined grooves are arranged in a vertical direction. One end of the lamp source assembly is inserted into the transverse inclined groove of one of the connecting pieces by a bolt to clamp the connecting piece. The other end of the lamp source assembly is inserted into the transverse inclined groove of another connecting piece by a bolt to clamp the connecting piece. The connecting piece is provided with a vertically extending vertical groove. One end of each of the plurality of transverse inclined grooves is connected to the vertical groove, and the vertical groove allows the bolt to move within it.

2. The tunnel-type UV curing oven according to claim 1, characterized in that: The lamp source assembly includes a lampshade and a UV lamp source disposed on the lampshade, with both ends of the lampshade threadedly connected to the bolts.

3. A tunnel-type UV curing oven according to claim 2, characterized in that: The UV lamp source includes one of the following: mercury lamp, metal halide lamp, LED-UV lamp, electrodeless lamp, and xenon lamp.

4. A tunnel-type UV curing oven according to claim 1, characterized in that: The conveying mechanism is a belt conveyor.

5. A tunnel-type UV curing oven according to claim 1, characterized in that: The top of the furnace box is equipped with a blower and an exhaust fan.

6. A tunnel-type UV curing oven according to claim 1, characterized in that: The inclination angle of the transverse inclined groove is 10-30°.

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