A nitrogen UV curing device

Abstract

This application belongs to the field of photocuring technology, specifically relating to a nitrogen UV curing device, including a central end plate. A curing chamber is installed on the upper end of the central end plate, and an ultraviolet lamp is installed at the top of the curing chamber. A loading and unloading box is installed on the lower end of the central end plate. The loading and unloading box and the curing chamber are connected through a central hole opened on the inner side of the central end plate. An openable door is provided on one side of the loading and unloading box, and a support plate is slidably arranged inside the loading and unloading box. A sliding groove is opened between the central end plate and the curing chamber, and a baffle is horizontally slidably arranged in the sliding groove. An exhaust port is connected to one side of the central hole, and a nitrogen filling port is provided on the other side of the central hole. This device can not only reduce the oxygen content in the curing chamber, but also reduce the amount of nitrogen overflowing outward, thus reducing nitrogen waste.

Description

Technical Field

[0001] This utility model belongs to the field of photocuring technology, specifically relating to a nitrogen UV curing device. Background Technology

[0002] "Nitrogen UV curing" refers to a process of curing ultraviolet (UV) light under an inert nitrogen (N2) atmosphere. Its core purpose is to eliminate or significantly reduce the interference of oxygen on the UV curing process, thereby achieving higher quality, more complete, and faster curing results. The basic principle of UV curing is to use ultraviolet light of a specific wavelength to irradiate the photocurable material (such as inks, coatings, and adhesives). The photoinitiator absorbs the UV energy, generating active free radicals or cations. These active species initiate rapid chain polymerization or cross-linking reactions of monomers and oligomers, causing the liquid material to solidify into a solid film or coating in an extremely short time (seconds).

[0003] For example, Chinese Patent Application Publication No. CN 213000997 U discloses a nitrogen-protected LED screen UV curing machine, which includes a fixed base plate, a fixed housing fixedly connected to the top of the fixed base plate, a protective plate fixedly connected to the left end of the fixed housing, a fixed plate fixedly connected inside the fixed housing, a sealing door provided on the left side of the fixed plate, a baffle fixedly connected to the left end of the sealing door, a fourth telescopic rod fixedly connected to the right side of the baffle and above the sealing door, the other end of the fourth telescopic rod fixedly connected to the fixed plate, and a nitrogen inlet provided on the top of the fixed housing. This invention uses two sets of sealing doors to seal the interior of the curing device. When removing and placing the cured component, the alternating opening and closing of the two doors retains nitrogen within the sealed space, significantly saving nitrogen consumption.

[0004] As described in the prior art of the aforementioned patent, although a structure design with two sets of sealed doors is adopted, and the two doors are opened and closed alternately, the internal curing space is indirectly connected with the external environment, thereby allowing oxygen to enter the curing space and causing the oxygen content of the curing space to increase. Utility Model Content

[0005] The purpose of this invention is to provide a nitrogen UV curing device that can effectively prevent the curing chamber from connecting with the external environment during the loading and unloading process, thus avoiding the problem of increased oxygen content in the curing environment leading to substandard curing quality.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A nitrogen UV curing device includes a central end plate. A curing chamber is installed on the upper end of the central end plate, and an ultraviolet lamp is installed at the top of the curing chamber. A loading and unloading box is installed on the lower end of the central end plate. The loading and unloading box and the curing chamber are connected through a central hole opened on the inner side of the central end plate. An openable door is provided on one side of the loading and unloading box. A support plate is slidably arranged inside the loading and unloading box. A sliding groove is opened between the central end plate and the curing chamber, and a baffle is slidably arranged horizontally in the sliding groove. An exhaust port is connected to one side of the central hole, and a nitrogen filling port is provided on the other side of the central hole.

[0008] In a preferred embodiment, an air extraction port is also connected to one side of the central hole, and a control valve is provided on the air extraction port.

[0009] In a preferred embodiment, a control valve is provided on the exhaust port 1, and a control valve is installed on the nitrogen filling port 1.

[0010] In a preferred embodiment, the baffles are arranged symmetrically about the vertical center line of the curing box, and each baffle is connected to a telescopic rod at its outer end, with the other end of the telescopic rod connected to the curing box.

[0011] In a preferred embodiment, an exhaust port two is connected to one side of the curing chamber, and a control valve four is installed on the exhaust port two.

[0012] In a preferred embodiment, the other side of the curing chamber is also connected to a nitrogen filling port and a vacuum port.

[0013] In a preferred embodiment, a control valve five is installed on the nitrogen filling port two, and a control valve six is ​​connected to the extraction port two.

[0014] In a preferred embodiment, an oxygen analyzer is installed on the curing chamber.

[0015] In a preferred embodiment, a pressure sensor is also provided on the curing chamber.

[0016] In a preferred embodiment, the lower end of the pallet is connected to a second telescopic rod, and the lower end of the second telescopic rod is fixedly connected to the loading and unloading bins.

[0017] The technical effects achieved by this utility model are as follows:

[0018] In this invention, during nitrogen UV curing, after curing is complete, a tray descends from the curing chamber into the loading and unloading bins. Then, a baffle is moved inwards to close, isolating the curing chamber from the loading and unloading bins. This prevents nitrogen leakage when the loading and unloading bins are opened for material removal and also prevents oxygen from entering through external contact. After the baffle closes, the openable door of the loading and unloading bins is opened to remove the cured product, and then a new product to be cured is placed in. The openable door is then closed, and control valve three in the nitrogen filling port is opened to inject nitrogen into the loading and unloading bins, driving out air from the exhaust port and reducing the nitrogen content. The baffle is then opened again, and the new product is fed into the curing chamber for curing. This process not only reduces the oxygen content in the curing chamber but also reduces nitrogen leakage, minimizing nitrogen waste. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the left-view isometric structure of this application;

[0020] Figure 2 This is a schematic diagram of the right-side isometric structure of this application;

[0021] Figure 3 This is a schematic diagram of the half-section equiaxed side structure of this application;

[0022] Figure 4 This is a structural schematic diagram of the central end plate and the loading and unloading boxes of this application;

[0023] Figure 5 This is a side view cross-sectional structural schematic diagram of this application;

[0024] Figure 6 This is a side view cross-sectional structural diagram of the central end plate and the curing chamber in this application.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Center end plate; 2. Curing chamber; 3. Ultraviolet lamp; 4. Loading and unloading bins; 5. Pallet; 6. Oxygen analyzer; 7. Pressure sensor; 8. Bracket; 11. Center hole; 12. Slide groove; 13. Baffle; 14. Telescopic rod one; 15. Exhaust port one; 16. Air extraction port one; 17. Nitrogen charging port one; 151. Control valve one; 161. Control valve two; 171. Control valve three; 21. Exhaust port two; 22. Nitrogen charging port two; 23. Air extraction port two; 211. Control valve four; 221. Control valve five; 231. Control valve six; 41. Openable door; 51. Telescopic rod two. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. The phrase "in a preferred embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0030] Secondly, this application provides a detailed description in conjunction with schematic diagrams. When detailing the embodiments of this application, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to general proportions. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this application. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0031] Please see the appendix Figures 1 to 6As shown, this application provides a nitrogen UV curing device, including a central end plate 1, a curing chamber 2 installed on the upper end of the central end plate 1, an ultraviolet lamp 3 installed on the top of the curing chamber 2, and a loading / unloading box 4 installed on the lower end of the central end plate 1. The loading / unloading box 4 and the curing chamber 2 are connected through a central hole 11 opened on the inner side of the central end plate 1. An openable door 41 is provided on one side of the loading / unloading box 4, and a support plate 5 is slidably arranged inside the loading / unloading box 4. A sliding groove 12 is provided between the central end plate 1 and the curing chamber 2, and a baffle 13 is horizontally slidably arranged in the sliding groove 12. An exhaust port 15 is connected to one side of the central hole 11, and a nitrogen filling port 17 is provided on the other side of the central hole 11. An exhaust port 16 is also connected to one side of the central hole 11. Control valve 161 is installed on plate 6; control valve 151 is installed on exhaust port 15; control valve 171 is installed on nitrogen filling port 17; baffles 13 are symmetrically arranged about the vertical center line of curing box 2, and each baffle 13 is connected to a telescopic rod 14 at its outer end, with the other end of the telescopic rod 14 connected to curing box 2; exhaust port 21 is connected to one side of curing box 2, and control valve 211 is installed on exhaust port 21; nitrogen filling port 22 and exhaust port 23 are also connected to the other side of curing box 2; control valve 221 is installed on nitrogen filling port 22, and control valve 231 is connected to exhaust port 23; telescopic rod 51 is connected to the lower end of support plate 5, and the lower end of telescopic rod 51 is fixedly connected to loading and unloading box 4.

[0032] Before the first product is cured, in order to remove as much oxygen as possible from the curing chamber 2, a vacuum pump can be connected through the evacuation port 23 and the control valve 231 on the evacuation port 23 can be opened to extract the oxygen from the curing chamber 2 by drawing a vacuum, so that the curing chamber 2 is in a vacuum state. Then, the control valve 221 on the nitrogen filling port 22 can be opened to fill the curing chamber 2 with nitrogen, so that the product can be cured in a nitrogen environment by irradiation with the ultraviolet lamp 3.

[0033] After completing the above steps, place the first product into the tray 5 of the loading and unloading box 4, and then close the openable door 41 of the loading and unloading box 4. When the product on the tray 5 is in a vacuum negative pressure environment, the vacuum pump can be connected through the air extraction port 16, and the control valve 161 can be opened. By connecting the air extraction port 16 to the vacuum pump, the air in the loading and unloading box 4 can be extracted. Then, the control valve 171 on the nitrogen filling port 17 can be opened to fill the loading and unloading box 4 with nitrogen.

[0034] When the product on pallet 5 cannot be in a vacuum negative pressure environment, the control valve 151 on the exhaust port 15 can be opened, and then the telescopic rod 2 51 can be extended upward to move pallet 5 upward. Through the compression of pallet 5, the air in the space above pallet 5 in the loading and unloading box 4 can be squeezed out as much as possible through exhaust port 15. When the product volume prevents pallet 5 from moving upward without the two baffles 13 being opened, the control valve 3 171 on the nitrogen filling port 17 can be opened to fill the loading and unloading box 4 with nitrogen. Through the filling of nitrogen, the air in the loading and unloading box 4 can be squeezed out. Then, the baffle 13 can be opened by the drive of telescopic rod 14, and the telescopic rod 2 51 can be extended upward to move pallet 5 into curing box 2. The product is then photocured by the irradiation of ultraviolet lamp 3.

[0035] After the product has cured, it is lowered from the curing chamber 2 into the loading / unloading bin 4 via the pallet 5. Then, the baffle 13 is adjusted to move inward and close, isolating the curing chamber 2 and the loading / unloading bin 4 to prevent nitrogen leakage when the loading / unloading bin 4 is opened to remove the product. It also prevents oxygen from entering the external environment. After the baffle 13 is closed, the openable door 41 of the loading / unloading bin 4 is opened to remove the cured product and place a new product to be cured. Then, the openable door 41 is closed, and the control valve 171 in the nitrogen filling port 17 is opened to fill the loading / unloading bin 4 with nitrogen, thereby driving the air out of the loading / unloading bin 4 through the exhaust port 15 and reducing the nitrogen content in the loading / unloading bin 4. Then, the baffle 13 is opened again to send the new product into the curing chamber 2 for curing. Through this operation, not only can the oxygen content in the curing chamber 2 be reduced, but also the amount of nitrogen overflowing can be reduced, thus reducing nitrogen waste. This is how the product loading / unloading operation is performed, and the products are light-cured one by one.

[0036] The exhaust port 21 on the curing chamber 2 can discharge the gas in the curing chamber 2. The opening and closing of the exhaust port 21 is controlled by the control valve 211.

[0037] It is worth noting that, in order to improve the sealing performance of the device, the connection between the central end plate 1 and the curing box 2, the connection between the baffle 13 and the central end plate 1, the connection between the baffle 13 and the curing box 2, the connection between the pallet 5 and the loading / unloading box 4, the connection between the pallet 5 and the openable door 41, etc., are all sealed using a sealing structure. The seal can be a sealing ring or other sealing methods.

[0038] The device is supported and fixed by the bracket 8 connected to the lower end of the central end plate 1.

[0039] In this embodiment, telescopic rod 14 and telescopic rod 2 51 are both electric telescopic rods, and control valve 1 151, control valve 2 161, control valve 3 171, control valve 4 211, control valve 5 221, and control valve 6 231 are all solenoid valves.

[0040] An oxygen analyzer 6 is installed on the curing chamber 2 to detect the oxygen content in the curing chamber 2. A pressure sensor 7 is also installed on the curing chamber 2 to detect the pressure in the curing chamber 2, so that the product can be photocured in a suitable pressure environment.

[0041] The telescopic rod and solenoid valve are both controlled by the control device, and the monitoring results of the oxygen analyzer 6 and the pressure sensor 7 are all transmitted to the controller for analysis. These are all existing technologies and will not be described in detail here.

[0042] The working principle of this application is as follows: During nitrogen UV curing, after curing is completed, the tray 5 descends from the curing chamber 2 into the loading and unloading box 4. Then, the baffle 13 is adjusted to move inward and close, isolating the curing chamber 2 and the loading and unloading box 4 to prevent nitrogen leakage from the curing chamber 2 when the loading and unloading box 4 is opened to retrieve materials. It also prevents oxygen from entering due to connection with the external environment. After the baffle 13 is closed, the openable door 41 of the loading and unloading box 4 is opened to remove the cured product and put in a new product that needs to be cured. Then, the openable door 41 is closed, and the control valve 171 in the nitrogen filling port 17 is opened to fill the loading and unloading box 4 with nitrogen to drive the air out of the loading and unloading box 4 through the exhaust port 15, thereby reducing the nitrogen content in the loading and unloading box 4. Then, the baffle 13 is opened again to send the new product into the curing chamber 2 for curing.

[0043] The above description is merely a preferred embodiment of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application. Structures, devices, and operating methods not specifically described or explained in this application are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A nitrogen UV curing apparatus characterized by: Includes a central end plate (1), a curing box (2) is installed on the upper end of the central end plate (1), an ultraviolet lamp (3) is provided on the top of the curing box (2), a loading and unloading box (4) is installed on the lower end of the central end plate (1), the loading and unloading box (4) and the curing box (2) are connected through a central hole (11) opened on the inner side of the central end plate (1), an openable door (41) is provided on one side of the loading and unloading box (4), and a tray (5) is slidably installed inside the loading and unloading box (4). A groove (12) is provided between the central end plate (1) and the curing box (2), and a baffle (13) is horizontally slidably arranged in the groove (12). An exhaust port (15) is connected to one side of the central hole (11), and a nitrogen filling port (17) is provided on the other side of the central hole (11).

2. The nitrogen UV curing apparatus of claim 1, wherein: One side of the central hole (11) is also connected to an air extraction port (16), and a control valve (161) is provided on the air extraction port (16).

3. The nitrogen UV curing device of claim 1, wherein: A control valve 1 (151) is provided on the exhaust port 1 (15), and a control valve 3 (171) is installed on the nitrogen filling port 1 (17).

4. The nitrogen UV curing apparatus of claim 1, wherein: The baffles (13) are symmetrically arranged about the vertical center line of the curing box (2). Each baffle (13) is connected to a telescopic rod (14) at its outer end. The other end of the telescopic rod (14) is connected to the curing box (2).

5. The nitrogen UV curing apparatus of claim 1, wherein: The curing chamber (2) is connected to an exhaust port two (21) on one side, and a control valve four (211) is installed on the exhaust port two (21).

6. The nitrogen UV curing apparatus of claim 1, wherein: The other side of the curing chamber (2) is also connected to a nitrogen filling port (22) and an exhaust port (23).

7. The nitrogen UV curing apparatus of claim 6, wherein: A control valve five (221) is installed on the nitrogen filling port two (22), and a control valve six (231) is connected to the exhaust port two (23).

8. The nitrogen UV curing apparatus of claim 1, wherein: An oxygen analyzer (6) is installed on the curing chamber (2).

9. The nitrogen UV curing apparatus of claim 1, wherein: A pressure sensor (7) is also installed on the curing chamber (2).

10. The nitrogen UV curing apparatus of claim 1, wherein: The lower end of the pallet (5) is connected to a telescopic rod (51), and the lower end of the telescopic rod (51) is fixedly connected to the loading and unloading box (4).

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