A dryer box for screen printing screens

Abstract

The application discloses a plate drying box for screen printing screen plate, which comprises a bottom plate, a box body fixedly connected to the bottom plate, a preheating cavity, a drying cavity and a cooling cavity in the box body, heat insulation rolling shutter door mechanisms arranged on the side walls of the preheating cavity, the drying cavity and the cooling cavity, a plurality of conveying mechanisms arranged on the bottom plate, screen plate supports placed on the conveying mechanisms, and screen plates placed on the screen plate supports; the drying assembly comprises a hot air mechanism arranged on the top wall of the drying cavity; an air flow circulation assembly comprising a waste heat emission mechanism arranged in the preheating cavity and a dehumidification mechanism; and a controller fixedly connected to the outer side wall of the box body. The plate drying box can not only dry the screen plate, but also preheat the screen plate before drying, so that the drying quality of the screen plate is higher; meanwhile, the air flow waste heat generated during drying is utilized and dehumidification is performed, so that the energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of drying equipment technology, and in particular to a drying box for screen printing stencils. Background Technology

[0002] Screen printing, a long-standing and widely used stencil printing technology, holds a vital position in fields such as electronics manufacturing, packaging printing, advertising signage, textile printing and dyeing, and arts and crafts due to its unique advantages, including wide substrate adaptability, thick ink layers, and a rich variety of inks. In recent years, with the transformation and upgrading of global manufacturing and the continuous expansion of emerging application areas, the screen printing industry has shown strong growth momentum, with a continuously expanding market size and increasingly higher requirements for printing accuracy, production efficiency, and environmental performance. The screen, as the core element of screen printing, directly determines the final printing effect based on its manufacturing quality. During the screen manufacturing process, drying after coating the photosensitive emulsion (screen drying) is a crucial step, directly affecting the uniformity and adhesion of the photosensitive emulsion layer and the accuracy of subsequent development.

[0003] The main shortcomings of existing technologies lie in the defects caused by thermal shock. Traditional drying ovens typically lack preheating structures or have rudimentary preheating functions. When a cold screen is directly introduced into the high-temperature drying zone, the surface temperature rises sharply, while the internal temperature rises lags behind. This drastic temperature difference (thermal shock) causes the surface of the photosensitive emulsion layer to rapidly form a skin and solidify, blocking the evaporation channels of the internal solvent and moisture. This easily leads to quality problems such as "false drying," pinholes, bubbles, and even cracking of the emulsion layer, seriously affecting the screen's printing durability and printing resolution.

[0004] Therefore, developing a screen printing stencil drying box with a preheating structure that can effectively eliminate thermal shock and achieve gradient heating has become an urgent need to improve plate-making quality and meet the needs of high-end printing. Summary of the Invention

[0005] The purpose of this invention is to provide a drying oven for screen printing stencils to solve the problems existing in the prior art, thereby enabling preheating of the stencils and eliminating thermal shock to achieve gradient heating.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a drying oven for screen printing stencils, comprising:

[0007] A base plate is fixedly connected to a housing, which contains a preheating chamber, a drying chamber, and a cooling chamber. The drying chamber and the cooling chamber are located on both sides of the preheating chamber. Insulated roller shutter mechanisms are provided on the side walls of the preheating chamber, the drying chamber, and the cooling chamber. Several conveying mechanisms are provided on the base plate, which are located on both sides of the insulated roller shutter. Mesh plate supports are placed on the conveying mechanisms for placing mesh plates. Temperature sensing devices are installed on the mesh plate supports.

[0008] A drying assembly, the drying assembly including a hot air mechanism disposed on the top wall of the drying chamber;

[0009] An airflow circulation assembly includes a waste heat dissipation mechanism and a dehumidification mechanism. The waste heat dissipation mechanism is disposed in the preheating chamber. The waste heat dissipation mechanism and the drying chamber are connected through a first pipe. The waste heat dissipation mechanism and the dehumidification mechanism are connected through a second pipe. The dehumidification mechanism and the drying chamber are connected through a third pipe.

[0010] The controller is fixedly connected to the outer wall of the housing. The heat insulation roller shutter mechanism, the conveying mechanism, the hot air mechanism, the waste heat dissipation mechanism and the dehumidification mechanism are all electrically connected to the controller. The temperature sensing device is signal connected to the controller.

[0011] Preferably, a plurality of partitions are fixedly connected between the housing and the base plate, and an entrance / exit is provided on the partitions, with the heat-insulated roller shutter door installed on the entrance / exit.

[0012] Preferably, the hot air mechanism includes a housing, a through hole is provided on the top wall of the housing, the housing is fixedly connected in the through hole, a first fan and a heating wire are fixedly connected inside the housing, the third pipe is connected to the housing, and the first fan and the heating wire are both electrically connected to the controller.

[0013] Preferably, the waste heat dissipation mechanism includes a first centralized box, a plurality of heat dissipation pipes, and a second centralized box. The first centralized box and the second centralized box are fixedly connected to the top wall of the housing. The plurality of heat dissipation pipes are fixedly connected between the first centralized box and the second centralized box, and all heat dissipation pipes are in communication with the first centralized box and the second centralized box. A second through hole is provided on the top wall of the housing, and a second fan is fixedly connected in the second through hole. The second fan is located above the heat dissipation pipes. The first pipe is in communication with the first centralized box, and the second pipe is in communication with the second centralized box. A circulating fan is installed on the second pipe. A filter screen is fixedly connected to the top wall of the housing, and the filter screen is located above the second fan. The second fan and the circulating fan are both electrically connected to the controller.

[0014] Preferably, the second collection box is provided with a drain outlet, the drain outlet is connected to a drain pipe, the drain pipe is connected to a collection bottle, and the collection bottle is located outside the box.

[0015] Preferably, the dehumidification mechanism includes a heat pump dehumidifier, the second pipe is connected to the air inlet of the heat pump dehumidifier, the third pipe is connected to the air outlet of the heat pump dehumidifier, and the heat pump dehumidifier is electrically connected to the controller.

[0016] Preferably, the heat-insulating roller blind mechanism includes a curtain body, and through slots are provided on both the partition and the housing. The through slots communicate with the inlet and outlet. A protective cover is fixedly connected to the top of the housing. A rotating shaft is rotatably connected inside the protective cover. A motor is fixedly connected to the outside of the protective cover. The drive shaft of the motor is fixedly connected to the rotating shaft. The curtain body is wound around the rotating shaft and extends into the through slot. The motor is electrically connected to the controller.

[0017] Preferably, a counterweight is fixedly connected to the end of the curtain body, and several rollers are installed on the counterweight. The rollers fit against the inner sidewall of the through groove, and a matching groove is opened in the through groove, and the counterweight is adapted to the matching groove.

[0018] Preferably, a through hole three is provided on the top wall of the housing, a third fan is installed in the through hole three, a plurality of ventilation holes are provided on the side wall of the housing, a filter screen two is fixedly connected in the ventilation holes, the third fan is located in the cooling cavity, and the ventilation holes are connected to the cooling cavity.

[0019] Preferably, the mesh panel support includes a base, on which a plurality of partitions are fixedly connected, and the mesh panel is placed between two of the partitions.

[0020] The present invention discloses the following technical effects:

[0021] 1. In this device, the mesh plate bracket is used to place the mesh plate. The mesh plate is placed on the mesh plate bracket, and then the mesh plate bracket is placed on the conveying mechanism. When placing the mesh plate bracket, other auxiliary equipment such as forklifts can be used.

[0022] 2. In this device, the preheating chamber is used to preheat the mesh plate. A conveying mechanism is set outside the preheating chamber. After the mesh plate support is placed on the conveying mechanism, the operation of the conveying mechanism is controlled by the controller. The mesh plate is preheated in the preheating chamber and then enters the drying chamber. Since the two conveying mechanisms are close to each other, the mesh plate support can be conveyed by the simultaneous operation of the conveying mechanisms. When the mesh plate support crosses the chamber, the heat insulation roller shutter mechanism will be raised to allow the mesh plate support to pass.

[0023] 3. In this device, the drying chamber is used to dry the mesh plate. When the mesh plate enters the drying chamber, it is dried by the hot air mechanism. At the same time as drying, the airflow circulation component will work, and the waste heat dissipation mechanism will draw out the air in the drying chamber. The airflow enters the waste heat dissipation mechanism and will dissipate heat in the preheating chamber, thereby preheating the mesh plate. Then the airflow enters the dehumidification mechanism to further dehumidify the airflow. The dehumidified airflow re-enters the drying chamber.

[0024] 4. In this device, after drying is completed, the heat-insulating roller shutter mechanism is raised, allowing the dried mesh to enter the cooling chamber. Inside the cooling chamber, the mesh slowly cools to room temperature. Then, the heat-insulating roller shutter mechanism is raised, and the conveying mechanism moves the mesh support out of the cooling chamber. Cooling, drying, and preheating can be carried out simultaneously to improve work efficiency. The temperature sensing device can measure the temperature at various positions on the mesh to keep it within a suitable temperature range. The temperature sensing device can send the temperature signal to the controller.

[0025] 5. This invention can not only dry the mesh plate, but also preheat it before drying, which improves the drying quality of the mesh plate. At the same time, it utilizes the waste heat of the drying airflow and dehumidifies, reducing energy consumption. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the drying box structure for screen printing stencils according to the present invention;

[0028] Figure 2 for Figure 1 Enlarged view of point a in the middle;

[0029] Figure 3 for Figure 1 Enlarged view of point b in the middle;

[0030] Figure 4 This is a top view of the present invention;

[0031] The components include: 1. Base plate; 2. Box body; 3. Preheating chamber; 4. Drying chamber; 5. Cooling chamber; 6. Conveying mechanism; 7. Mesh plate support; 8. First pipe; 9. Second pipe; 10. Third pipe; 11. Controller; 12. Partition plate; 13. Outer shell; 14. First fan; 15. Heating wire; 16. First central box; 17. Heat dissipation pipe; 18. Second central box; 19. Second fan; 20. Filter screen; 21. Drain pipe; 22. Heat pump dehumidifier; 23. Curtain; 24. Protective cover; 25. Rotating shaft; 26. Motor; 27. Counterweight bar; 28. Roller; 29. ​​Third fan; 30. Ventilation hole; 31. Base; 32. Divider frame; 33. Circulating fan; 34. Temperature sensing device. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figure 1-4 The present invention provides a drying oven for screen printing stencils, comprising:

[0035] A base plate 1 is fixedly connected to a box 2. The box 2 has a preheating chamber 3, a drying chamber 4 and a cooling chamber 5. The drying chamber 4 and the cooling chamber 5 are located on both sides of the preheating chamber 3. Insulated roller shutter mechanisms are provided on the side walls of the preheating chamber 3, the drying chamber 4 and the cooling chamber 5. Several conveying mechanisms 6 are provided on the base plate 1. The conveying mechanisms 6 are located on both sides of the insulated roller shutter. A mesh plate bracket 7 is placed on the conveying mechanism 6. The mesh plate bracket 7 is used to place the mesh plate.

[0036] The drying assembly includes a hot air mechanism, which is located on the top wall of the drying chamber 4.

[0037] The airflow circulation assembly includes a waste heat dissipation mechanism and a dehumidification mechanism. The waste heat dissipation mechanism is located in the preheating chamber 3. The waste heat dissipation mechanism and the drying chamber 4 are connected through a first pipe 8. The waste heat dissipation mechanism and the dehumidification mechanism are connected through a second pipe 9. The dehumidification mechanism and the drying chamber 4 are connected through a third pipe 10.

[0038] The controller 11 is fixedly connected to the outer wall of the housing 2. The heat insulation roller shutter mechanism, the conveying mechanism 6, the hot air mechanism, the waste heat dissipation mechanism and the dehumidification mechanism are all electrically connected to the controller 11.

[0039] In this device, the mesh support 7 is used to place the mesh. The mesh is placed on the mesh support 7, and then the mesh support 7 is placed on the conveying mechanism 6. Forklifts or other auxiliary equipment can be used when placing the mesh support 7. The preheating chamber 3 is used to preheat the mesh. The conveying mechanism 6 is located outside the preheating chamber 3. After the mesh support 7 is placed on the conveying mechanism 6, the controller 11 controls the operation of the conveying mechanism 6. The mesh is preheated in the preheating chamber 3 before entering the drying chamber 4. Because the two conveying mechanisms 6 are close together, the mesh support 7 can be conveyed by the simultaneous operation of the conveying mechanisms 6. When the mesh support 7 crosses a chamber, the heat-insulating roller shutter mechanism will rise to allow the mesh support 7 to pass. The drying chamber 4 is used to dry the mesh. After the mesh enters the drying chamber 4, it is dried by a hot air mechanism. While drying is in progress, the airflow circulation component operates, and the waste heat dissipation mechanism extracts air from the drying chamber 4. The airflow enters the waste heat dissipation mechanism and dissipates heat in the preheating chamber 3, thus preheating the mesh plate. Then, the airflow enters the dehumidification mechanism for further dehumidification. The dehumidified airflow then re-enters the drying chamber 4. After drying is complete, the heat-insulating roller shutter mechanism rises, allowing the dried mesh plate to enter the cooling chamber 5. In the cooling chamber 5, the mesh plate slowly cools to room temperature. Then, the heat-insulating roller shutter mechanism rises again, and the conveying mechanism 6 moves the mesh plate support 7 out of the cooling chamber 5. Cooling, drying, and preheating can be performed simultaneously to improve work efficiency. The temperature sensing device 34 can measure the temperature at various locations on the mesh plate to ensure it is within a suitable temperature range. The temperature sensing device 34 can send temperature signals to the controller 11. The connection between multiple temperature sensing devices 34 and the controller 11 uses existing technology. The controller 11 is a PLC controller. Using existing technology, the multiple temperature sensing devices 34 can be numbered for easy recording and operation.

[0040] The scheme is further optimized by fixing several partitions 12 between the box body 2 and the bottom plate 1. The partitions 12 are provided with entrances and exits, and the heat-insulated roller shutter door is installed on the entrances and exits.

[0041] The partition 12 is used to divide the chamber 2 into a preheating chamber 3, a drying chamber 4, and a cooling chamber 5.

[0042] The hot air mechanism further optimizes the design by including a housing 13, a through hole 1 on the top wall of the housing 2, a housing 13 fixedly connected to the through hole 1, a first fan 14 and a heating wire 15 fixedly connected inside the housing 13, a third pipe 10 connected to the housing 13, and the first fan 14 and the heating wire 15 both electrically connected to the controller 11.

[0043] When drying the mesh plate, the heating wire 15 generates heat, the first fan 14 blows air, and the hot air blows towards the mesh plate, thereby drying the mesh plate. The dehumidified airflow enters the outer casing 13 through the third pipe 10. The airflow circulation can reduce the power consumption of the heating wire 15.

[0044] The waste heat dissipation mechanism further optimizes the design, including a first centralized box 16, several heat dissipation pipes 17, and a second centralized box 18. The first centralized box 16 and the second centralized box 18 are fixedly connected to the top wall of the housing 2. Several heat dissipation pipes 17 are fixedly connected between the first centralized box 16 and the second centralized box 18. All heat dissipation pipes 17 are connected to the first centralized box 16 and the second centralized box 18. A second through hole 2 is provided on the top wall of the housing 2. A second fan 19 is fixedly connected in the second through hole 2. The second fan 19 is located above the heat dissipation pipes 17. A first pipe 8 is connected to the first centralized box 16, and a second pipe 9 is connected to the second centralized box 18. A circulating fan 33 is installed on the second pipe 9. A filter screen 20 is fixedly connected to the top wall of the housing 2. The filter screen 20 is located above the second fan 19. The second fan 19 and the circulating fan 33 are both electrically connected to the controller 11.

[0045] The first central box 16, several heat dissipation pipes 17, and the second central box 18 are all located in the preheating chamber 3. The circulating fan 33 can accelerate the flow of air. The airflow enters the first central box 16 through the first pipe 8 and then enters the heat dissipation pipes 17. The second fan 19 blows air onto the heat dissipation pipes 17 to dissipate heat and preheat the mesh plate in the preheating chamber 3.

[0046] The scheme is further optimized by providing a drain outlet on the second collection box 18, which is connected to a drain pipe 21. The drain pipe 21 is connected to a collection bottle, which is located outside the box 2.

[0047] When the airflow in the heat dissipation pipe 17 dissipates heat, it will generate condensation water. The water will flow into the second collection box 18 and then flow into the collection bottle (not shown in the figure) through the drain pipe 21.

[0048] The dehumidification mechanism is further optimized by including a heat pump dehumidifier 22, a second pipe 9 connected to the air inlet of the heat pump dehumidifier 22, a third pipe 10 connected to the air outlet of the heat pump dehumidifier 22, and the heat pump dehumidifier 22 electrically connected to the controller 11.

[0049] The heat pump dehumidifier 22 can further dehumidify the airflow while retaining a certain amount of heat, reducing power consumption. The dehumidified airflow enters the outer casing 13 through the third pipe 10.

[0050] The scheme is further optimized. The heat-insulating roller blind mechanism includes a curtain body 23, a partition 12 and a box 2, all of which are provided with through grooves. The through grooves are connected to the inlet and outlet. A protective cover 24 is fixedly connected to the top of the box 2. A rotating shaft 25 is rotatably connected inside the protective cover 24. A motor 26 is fixedly connected to the outside of the protective cover 24. The drive shaft of the motor 26 is fixedly connected to the rotating shaft 25. The curtain body 23 is wound on the rotating shaft 25 and extends into the through groove. The motor 26 is electrically connected to the controller 11.

[0051] Motor 26 drives shaft 25 to rotate. When shaft 25 rotates, it will roll up or lower curtain 23. Curtain 23 has a certain thickness and toughness, and can be rolled up or lowered.

[0052] In a further optimized design, a counterweight strip 27 is fixedly connected to the end of the curtain body 23. Several rollers 28 are installed on the counterweight strip 27. The rollers 28 fit against the inner side wall of the through groove. A matching groove is opened in the through groove, and the counterweight strip 27 is adapted to the matching groove.

[0053] The counterweight 27 facilitates the lowering of the curtain body 23, and the roller 28 facilitates the movement of the curtain body 23 within the through groove.

[0054] The design is further optimized by providing a through hole 3 on the top wall of the housing 2, in which a third fan 29 is installed. Several ventilation holes 30 are provided on the side wall of the housing 2, in which a filter screen 2 is fixedly connected. The third fan 29 is located in the cooling chamber 5, and the ventilation holes 30 are connected to the cooling chamber 5.

[0055] The third fan 29 blows air out of the cooling chamber 5, and the cold air from outside enters the cooling chamber 5 through the ventilation hole 30, causing the mesh plate to gradually cool down.

[0056] The scheme is further optimized. The mesh support 7 includes a base 31, and several partitions 32 are fixedly connected to the base 31. The mesh is placed between two partitions 32.

[0057] The base 31 is relatively long, which facilitates movement between two adjacent conveying mechanisms 6, and the separator 32 is used to separate multiple mesh panels.

[0058] The device is used as follows: The mesh plate is placed on the mesh plate support 7, and then the conveying mechanism 6 is activated via the controller 11 to move the mesh plate support 7 into the preheating chamber 3. After preheating, the motor 26 drives the rotating shaft 25 to rotate, raising the curtain 23. After the mesh plate support 7 passes through, the curtain 23 lowers. When the mesh plate enters the drying chamber 4, the heating wire 15 generates heat, and the first fan 14 blows hot air onto the mesh plate, thus drying it. The airflow in the drying chamber 4 enters the first collection box 16 through the first pipe 8, and then enters the heat dissipation pipe 17. The second fan... Fan 19 blows air onto heat dissipation pipe 17, facilitating airflow and preheating the mesh plate in preheating chamber 3. The airflow then enters heat pump dehumidifier 22 for further dehumidification, retaining some heat before re-entering drying chamber 4. After drying, the heat-insulating roller shutter mechanism lifts, allowing the dried mesh plate to enter cooling chamber 5. In cooling chamber 5, the mesh plate slowly cools to room temperature. A temperature sensing device can measure the temperature at various locations on the mesh plate, such as when it is not in the working chamber, and when it enters preheating chamber 3, drying chamber 4, and cooling chamber 5, facilitating temperature control of the mesh plate's environment. In this embodiment... Figure 1 This is a front sectional view. Figure 2 This is a top view, not a sectional view.

[0059] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, 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 this invention.

[0060] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A drying box for screen printing stencils, characterized in that, include: A base plate (1) is fixedly connected to a box (2). The box (2) has a preheating chamber (3), a drying chamber (4) and a cooling chamber (5). The drying chamber (4) and the cooling chamber (5) are located on both sides of the preheating chamber (3). Insulated roller shutter mechanisms are provided on the side walls of the preheating chamber (3), the drying chamber (4) and the cooling chamber (5). Several conveying mechanisms (6) are provided on the base plate (1). The conveying mechanisms (6) are located on both sides of the insulated roller shutter. A mesh plate bracket (7) is placed on the conveying mechanism (6). The mesh plate bracket (7) is used to place the mesh plate. A temperature sensing device (34) is installed on the mesh plate bracket (7). The drying assembly includes a hot air mechanism disposed on the top wall of the drying chamber (4); An airflow circulation assembly includes a waste heat dissipation mechanism and a dehumidification mechanism. The waste heat dissipation mechanism is located in the preheating chamber (3). The waste heat dissipation mechanism and the drying chamber (4) are connected through a first pipe (8). The waste heat dissipation mechanism and the dehumidification mechanism are connected through a second pipe (9). The dehumidification mechanism and the drying chamber (4) are connected through a third pipe (10). The controller (11) is fixedly connected to the outer wall of the box (2). The heat insulation roller shutter mechanism, the conveying mechanism (6), the hot air mechanism, the waste heat dissipation mechanism and the dehumidification mechanism are all electrically connected to the controller (11). The temperature sensing device (33) is signal connected to the controller (11).

2. The drying oven for screen printing stencils according to claim 1, characterized in that: A number of partitions (12) are fixedly connected between the box body (2) and the bottom plate (1). The partitions (12) have entrances and exits, and the heat-insulating roller shutter door is installed on the entrances and exits.

3. The drying oven for screen printing stencils according to claim 1, characterized in that: The hot air mechanism includes a housing (13), and a through hole is provided on the top wall of the housing (2). The housing (13) is fixedly connected in the through hole. A first fan (14) and a heating wire (15) are fixedly connected inside the housing (13). The third pipe (10) is connected to the housing (13). The first fan (14) and the heating wire (15) are both electrically connected to the controller (11).

4. The drying oven for screen printing stencils according to claim 1, characterized in that: The waste heat dissipation mechanism includes a first centralized box (16), several heat dissipation pipes (17), and a second centralized box (18). The first centralized box (16) and the second centralized box (18) are fixedly connected to the top wall of the housing (2). Several heat dissipation pipes (17) are fixedly connected between the first centralized box (16) and the second centralized box (18). Each heat dissipation pipe (17) communicates with both the first centralized box (16) and the second centralized box (18). A second through hole is provided on the top wall of the housing (2). A second through hole is fixedly connected to the second through hole. Two fans (19), the second fan (19) is located above the heat dissipation pipe (17), the first pipe (8) is connected to the first central box (16), the second pipe (9) is connected to the second central box (18), a circulating fan (33) is installed on the second pipe (9), a filter screen (20) is fixedly connected to the top wall of the box (2), the filter screen (20) is located above the second fan (19), and the second fan (19) and the circulating fan (33) are both electrically connected to the controller (11).

5. A drying oven for screen printing stencils according to claim 4, characterized in that: The second collection box (18) has a drain outlet, and a drain pipe (21) is connected to the drain outlet. The drain pipe (21) is connected to a collection bottle, which is located outside the box (2).

6. A drying oven for screen printing stencils according to claim 1, characterized in that: The dehumidification mechanism includes a heat pump dehumidifier (22), the second pipe (9) is connected to the air inlet of the heat pump dehumidifier (22), the third pipe (10) is connected to the air outlet of the heat pump dehumidifier (22), and the heat pump dehumidifier (22) is electrically connected to the controller (11).

7. A drying oven for screen printing stencils according to claim 2, characterized in that: The heat-insulating roller blind mechanism includes a curtain body (23), and through slots are provided on both the partition plate (12) and the box body (2). The through slots are connected to the inlet and outlet. A protective cover (24) is fixedly connected to the top of the box body (2). A rotating shaft (25) is rotatably connected inside the protective cover (24). A motor (26) is fixedly connected to the outside of the protective cover (24). The drive shaft of the motor (26) is fixedly connected to the rotating shaft (25). The curtain body (23) is wound around the rotating shaft (25). The curtain body (23) extends into the through slot. The motor (26) is electrically connected to the controller (11).

8. A drying oven for screen printing stencils according to claim 7, characterized in that: The end of the curtain (23) is fixedly connected to a counterweight strip (27), and several rollers (28) are installed on the counterweight strip (27). The rollers (28) are in contact with the inner side wall of the through groove. A matching groove is opened in the through groove, and the counterweight strip (27) is adapted to the matching groove.

9. A drying oven for screen printing stencils according to claim 1, characterized in that: The top wall of the box (2) has a through hole three, and a third fan (29) is installed in the through hole three. Several ventilation holes (30) are opened on the side wall of the box (2). A filter screen two is fixedly connected in the ventilation hole (30). The third fan (29) is located in the cooling cavity (5). The ventilation hole (30) is connected to the cooling cavity (5).

10. A drying oven for screen printing stencils according to claim 1, characterized in that: The mesh support (7) includes a base (31), on which several partitions (32) are fixedly connected, and the mesh is placed between two partitions (32).

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