Cooling device for polycarbonate plate production

Abstract

The invention relates to the technical field of cooling devices, in particular to a cooling device for polycarbonate plate production. The cooling device comprises a cooling box, a plurality of U-shaped blocks are arranged at the top end and the bottom end in the cooling box, a plurality of electric rollers are arranged in the U-shaped blocks, two supporting plates are fixed to the ends, away from each other, of the U-shaped blocks at the top end and the bottom end correspondingly, linkage blocks are fixed to the two sides of the two supporting plates correspondingly, and guide rails are arranged at the two ends of the two sides of the cooling box correspondingly. According to the cooling device for polycarbonate plate production, the adjusting mechanism drives the linkage blocks at the top end and the bottom end to move in the direction close to each other, so that the linkage blocks at the top end and the bottom end are adjusted according to the size of a polycarbonate plate, and at the moment, the electric roller is started to convey and cool the polycarbonate plate; and then cooling liquid is poured into the water tank, then the cooling liquid is conveyed into the flow guide plate through the water pump, spraying cooling is conducted on the polycarbonate plate through the spray head, and therefore the cooling effect of the polycarbonate plate is effectively promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling devices, and in particular to a cooling device for polycarbonate sheet production. Background Art

[0002] A polycarbonate sheet (abbreviated as PC sheet) is a polymer material sheet made from polycarbonate polymer. The polycarbonate sheet has good transparency, and the visible light transmittance can reach 90%. It is suitable as a building decoration material, with outstanding impact resistance, creep resistance, relatively high tensile strength, flexural strength, elongation at break and rigidity. It also has good heat resistance and cold resistance and can be used at extreme temperatures.

[0003] For example, patent (CN119408023A) discloses a cooling device for polycarbonate sheet production, including an air-cooled cooling box. An air-cooled channel is penetrated through the air-cooled cooling box. A plurality of linearly arranged temperature-sensing rollers are rotatably installed in the air-cooled channel. The temperature-sensing rollers are used to convey the polycarbonate sheet. A fan is also installed in the air-cooled channel. A cold air inlet communicating with the air-cooled channel is opened on the air-cooled cooling box. This invention proposes a cooling device for polycarbonate sheet production. By setting the air-cooled cooling box, air-cooled channel, temperature-sensing rollers, fan, plugging member and transmission structure, it can control the amount of cold air entering the air-cooled channel according to the temperature of the polycarbonate sheet itself, so as to gradually cool the polycarbonate sheet correspondingly according to its own temperature. No power source is used in the entire structure for controlling the amount of cold air, reducing the vibration impact on the device and the impact on the quality of the polycarbonate sheet caused by the vibration of the device.

[0004] When using the above technology, it is found that the following technical problems exist in the prior art: During the production of polycarbonate sheets, the polycarbonate sheet forms a preliminary shape from the extrusion head die, and it still needs to be cooled after extrusion. The prior art usually uses an air-cooled channel to cool the polycarbonate sheet in the initial shape of production. To ensure the cooling effect, the polycarbonate sheet needs to stay in the cooling box for a long time, which significantly reduces the cooling efficiency. Therefore, the air cooling in the prior art reduces the cooling efficiency, and it is not convenient to fix according to the size of the polycarbonate sheet in the prior art, thus reducing the stability of the polycarbonate sheet conveying and cooling. For this reason, we design a cooling device for polycarbonate sheet production to provide another technical solution to the above technical problems. Summary of the Invention

[0005] Based on this, it is necessary to provide a polycarbonate sheet production cooling device for the above technical problems. When the polycarbonate sheet forms a preliminary shape from the extrusion head die, it is necessary to cool the extruded polycarbonate sheet. Then, the adjusting mechanism drives the linkage blocks at the top and bottom to move towards each other, so that the linkage blocks at the top and bottom are adjusted according to the size of the polycarbonate sheet. At this time, the electric rollers are started to convey and cool the polycarbonate sheet. Then, the coolant is poured into the interior of the water tank with a water tank, and then the coolant is transported to the interior of the deflector by a water pump. And there are nozzles to spray and cool the polycarbonate sheet, thereby effectively promoting the cooling effect of the polycarbonate sheet. When the sprayed coolant exchanges heat with the polycarbonate sheet, the exchanged coolant flows through the flow holes on the surface of the polycarbonate sheet and into the interior of the water tank for circulating cooling. Therefore, the coolant is effectively recycled.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions: A polycarbonate sheet production cooling device includes a cooling box. At the top and bottom inside the cooling box, there are several U-shaped blocks. Inside the U-shaped blocks, there are several electric rollers. At the mutually remote ends of the U-shaped blocks at the top and bottom, two support plates are fixed respectively. On both sides of the two support plates, linkage blocks are fixed. At both ends of both sides of the cooling box, guide rails are opened. The inner sides of the guide rails are slidably connected to the linkage blocks. At the bottom of the cooling box, a water tank is fixed. At one end inside the cooling box, three deflectors are assembled. At the mutually close ends of adjacent two deflectors, several nozzles are fixed. On both sides of the cooling box, there is an adjusting mechanism for driving the U-shaped blocks at the top and bottom to clamp according to the polycarbonate sheet.

[0007] As a preferred embodiment of the polycarbonate sheet production cooling device provided by the present invention, on one side of the water tank, there is a spraying mechanism for water-cooling the polycarbonate sheet. The spraying mechanism includes a water pump. A water pump is fixed on one side of the water tank. The output end of the water pump is fixedly connected to the deflector through a hose, and the output end of the water pump is fixed to the water tank through a conduit.

[0008] As a preferred embodiment of the polycarbonate sheet production cooling device provided by the present invention, at the bottom inside the water tank, a cooling pipe is assembled, and a filter plate is fixed at the top of the water tank.

[0009] As a preferred embodiment of the polycarbonate sheet production cooling device provided by the present invention, the adjusting mechanism includes a left - right threaded rod, a servo motor, and a clamping assembly. Both sides of the cooling box are rotatably connected to the left - right threaded rod. The top and bottom ends of the outer side of the left - right threaded rod are respectively threadedly connected to the top and bottom linkage blocks. The tops of the two left - right threaded rods are rotatably connected by a transmission belt. One side of the cooling box is fixed with a servo motor, and the output end of the servo motor is fixed to one of the left - right threaded rods.

[0010] As a preferred embodiment of the polycarbonate sheet production cooling device provided by the present invention, a clamping assembly for pressing the polycarbonate sheet is arranged inside the U - shaped block. The clamping assembly includes a U - shaped clamping plate, guide rollers, guide rods, springs, and L - shaped blocks. Both sides inside the U - shaped block are slidably connected to the U - shaped clamping plate, and several guide rollers are rotatably connected inside the U - shaped clamping plate.

[0011] As a preferred embodiment of the polycarbonate sheet production cooling device provided by the present invention, L - shaped blocks are fixed on both sides of the U - shaped block. Several guide rods are slidably connected inside the L - shaped blocks. The ends of the guide rods away from the L - shaped blocks are fixed to the U - shaped clamping plate. Springs are sleeved on the outer sides of the guide rods. One end of the spring is fixed to the U - shaped clamping plate, and the other end of the spring is fixed to the L - shaped block.

[0012] As a preferred embodiment of the polycarbonate sheet production cooling device provided by the present invention, flow holes are opened at the bottoms of the two U - shaped blocks at the bottom.

[0013] As a preferred embodiment of the polycarbonate sheet production cooling device provided by the present invention, a drying mechanism for drying the polycarbonate sheet is arranged at the other end of the top of the cooling box. The drying mechanism includes a fan and a heating tube. An air - permeable box is fixed at the other end of the inner top of the cooling box. Several heating tubes are assembled inside the air - permeable box, and a fan is assembled above the heating tubes inside the air - permeable box.

[0014] As a preferred embodiment of the polycarbonate sheet production cooling device provided by the present invention, a filter screen is fixed on the top of the air - permeable box, and support legs are fixed at the four ends of the bottom of the cooling box.

[0015] As a preferred embodiment of the polycarbonate sheet production cooling device provided by the present invention, a partition is fixed in the middle of the inside of the cooling box, and the inner side of the partition is slidably connected to the U - shaped block.

[0016] It can be undoubtedly seen that through the above - mentioned technical solutions of this application, the technical problems to be solved by this application can surely be solved.

[0017] Meanwhile, through the above technical solutions, the present invention at least has the following beneficial effects: A polycarbonate plate production cooling device provided by the present invention controls the temperature of the coolant through a cooling pipe, then starts a water pump to convey the cooled coolant to a diversion plate, and sprays the cooled coolant from the cooling pipe onto the polycarbonate plate for cooling. At this time, the cooled coolant greatly contacts the surface of the polycarbonate plate, greatly increasing the cooling effect of the polycarbonate plate; Driven by the elasticity of a spring, a U-shaped clamping plate and guide rollers apply pressure to the polycarbonate plate, enabling the two guide rollers to limit the position of the polycarbonate plate. Then, a servo motor is started to drive one of the left-right threaded rods to rotate, and the two left-right threaded rods are driven to rotate synchronously through a transmission belt, causing the left-right threaded rods to drive the linkage blocks at the top and bottom of the linkage block to adjust and clamp according to the size of the polycarbonate plate, thereby effectively improving the conveying efficiency and stability of the polycarbonate plate; By starting a heating pipe to generate a large amount of heat, and then a fan blows the heat dissipated by the heating pipe onto the surface of the polycarbonate plate, so as to blow off the coolant on the surface of the polycarbonate plate, and the heat in the wind effectively dries part of the coolant, thereby effectively ensuring the dryness of the surface of the polycarbonate plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic side view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of the cooling box of the present invention; Figure 4 It is a schematic diagram of the sliding structure between the U-shaped block and the cooling box of the present invention; Figure 5 It is a schematic diagram of the structure between the U-shaped block and the partition of the present invention; Figure 6 It is a schematic diagram of the connection structure between the left-right threaded rod and the linkage block of the present invention; Figure 7 It is a schematic diagram of the structure between the U-shaped block and the linkage block of the present invention; Figure 8 It is a schematic diagram of the rotational structure between the U-shaped block and the electric roller of the present invention; Figure 9 It is a schematic diagram of the internal structure between the cooling pipe and the water pump of the present invention; Figure 10 This is a schematic diagram of the internal structure of the filter screen of the present invention.

[0020] In the figure: 1. Cooling box; 2. Water tank; 3. Ventilation box; 4. Guide rail; 5. Filter screen; 6. Support plate; 7. U-shaped block; 8. Support leg; 9. Linking block; 10. Partition board; 11. Positive and reverse threaded rod; 12. Servo motor; 13. U-shaped clamping plate; 14. Guide roller; 15. Electric roller; 16. Guide rod; 17. Spring; 18. L-shaped block; 19. Flow hole; 20. Water pump; 21. Deflector; 22. Sprinkler; 23. Cooling pipe; 24. Fan; 25. Heating pipe. Specific embodiments

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments can be combined with each other.

[0024] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] Embodiment 1 Please refer to Figures 1 - 9 , a cooling device for polycarbonate sheet production, including a cooling box 1. A plurality of U-shaped blocks 7 are provided at the top and bottom inside the cooling box 1. A plurality of electric rollers 15 are provided inside the U-shaped blocks 7. Flow holes 19 are opened at the bottom of the two U-shaped blocks 7 at the bottom end. At the mutually remote ends of the U-shaped blocks 7 at the top and bottom, two support plates 6 are fixed respectively. Linking blocks 9 are fixed on both sides of the two support plates 6. Guide rails 4 are opened at both ends on both sides of the cooling box 1. The inner side of the guide rail 4 is slidably connected with the linking block 9. A water tank 2 is fixed at the bottom end of the cooling box 1. Three deflectors 21 are assembled at one end inside the cooling box 1. A plurality of sprinklers 22 are fixed at the mutually close ends of two adjacent deflectors 21. An adjusting mechanism for driving the U-shaped blocks 7 at the top and bottom to clamp according to the polycarbonate sheet is provided on both sides of the cooling box 1; During use, when the polycarbonate sheet forms a preliminary shape from the extrusion head die, it is necessary to cool the extruded polycarbonate sheet. Then, the adjustment mechanism drives the linkage blocks 9 at the top and bottom towards each other, so that the linkage blocks 9 at the top and bottom are adjusted according to the size of the polycarbonate sheet. At this time, the electric roller 15 is started to convey and cool the polycarbonate sheet. Then, the coolant is poured into the interior of the water tank 2, and then the coolant is transported to the interior of the deflector 21 by the water pump 20, and the spray head 22 sprays and cools the polycarbonate sheet, thus effectively promoting the cooling effect of the polycarbonate sheet. When the sprayed coolant exchanges heat with the polycarbonate sheet, the exchanged coolant passes through the flow holes 19 on the surface of the polycarbonate sheet and flows into the interior of the water tank 2 for circulating cooling. Therefore, the coolant is effectively recycled.

[0026] A spraying mechanism for water-cooling the polycarbonate sheet is provided on one side of the water tank 2. The spraying mechanism includes a water pump 20. The water pump 20 is fixed on one side of the water tank 2. The output end of the water pump 20 is fixedly connected to the deflector 21 through a hose, and the output end of the water pump 20 is fixedly connected to the water tank 2 through a conduit. A cooling pipe 23 is assembled at the bottom end inside the water tank 2, and a filter plate is fixed at the top end of the water tank 2. Specifically, when the coolant is poured into the interior of the water tank 2, the coolant is temperature-controlled through the cooling pipe 23, and then the water pump 20 is started to transport the cooled coolant to the deflector 21, and it sprays towards the polycarbonate sheet for cooling. At this time, the cooled coolant greatly contacts the surface of the polycarbonate sheet, greatly increasing the cooling effect of the polycarbonate sheet. At this time, the cooled coolant exchanges heat with the polycarbonate sheet. At this time, the exchanged coolant passes through the flow holes 19 on the surface of the polycarbonate sheet and flows into the interior of the water tank 2. Then, the filter plate at the top end of the water tank 2 effectively screens the exchanged coolant, thereby preventing dust on the surface of the polycarbonate sheet from entering the interior of the water tank 2, which may cause the spray head 22 to become blocked. The adjustment mechanism includes a positive and negative threaded rod 11, a servo motor 12, and a clamping assembly. The positive and negative threaded rods 11 are rotatably connected to both sides of the cooling box 1. The top and bottom of the outer side of the positive and negative threaded rod 11 are respectively threadedly connected to the top and bottom linkage blocks 9. The tops of the two positive and negative threaded rods 11 are rotatably connected through a transmission belt. The servo motor 12 is fixed on one side of the cooling box 1, and the output end of the servo motor 12 is fixedly connected to one of the positive and negative threaded rods 11. Inside the U-shaped block 7, there is a clamping assembly for pressing the polycarbonate plate. The clamping assembly includes a U-shaped clamping plate 13, guide rollers 14, guide rods 16, springs 17, and L-shaped blocks 18. On both sides inside the U-shaped block 7, the U-shaped clamping plates 13 are slidably connected. Inside the U-shaped clamping plates 13, several guide rollers 14 are rotatably connected. Through the positive and reverse threaded rod driven by the servo motor and the belt linkage system, the symmetrical and synchronous displacement of the upper and lower U-shaped blocks is realized; On both sides of the U-shaped block 7, L-shaped blocks 18 are fixed. Inside the L-shaped blocks 18, several guide rods 16 are slidably connected. One end of the guide rod 16 away from the L-shaped block 18 is fixed to the U-shaped clamping plate 13. The outer side of the guide rod 16 is sleeved with a spring 17. One end of the spring 17 is fixed to the U-shaped clamping plate 13, and the other end of the spring 17 is fixed to the L-shaped block 18; Specifically, when it is necessary to convey and cool the polycarbonate plate, at this time, the polycarbonate plate is placed between the corresponding U-shaped blocks 7 at the top and bottom, and then the polycarbonate plate is conveyed by the electric roller 15. In order to prevent the polycarbonate plate from being unstable during the conveying process, at this time, the elasticity of the spring 17 drives the U-shaped clamping plate 13 and the guide rollers 14 to press the polycarbonate plate, so that the two guide rollers 14 limit the polycarbonate plate. Then, the servo motor 12 is started to drive one of the positive and reverse threaded rods 11 to rotate, and the two positive and reverse threaded rods 11 are driven to rotate synchronously through the belt, so that the positive and reverse threaded rods 11 drive the linkage blocks 9 at the top and bottom of the linkage block 9 to adjust and clamp according to the size of the polycarbonate plate, thereby effectively improving the conveying efficiency and stability of the polycarbonate plate; Embodiment Two Please refer to Figure 10 A polycarbonate plate production and cooling device. At the other end of the top of the cooling box 1, there is a drying mechanism for drying the polycarbonate plate. The drying mechanism includes a fan 24 and a heating pipe 25. At the other end of the inner top of the cooling box 1, a ventilation box 3 is fixed. Inside the ventilation box 3, several heating pipes 25 are assembled. Above the heating pipes 25 inside the ventilation box 3, a fan 24 is assembled. The hot air temperature is controlled within the range of 40 - 60 °C, and the wind speed is adjustable, ensuring the rapid evaporation of the coolant while avoiding overheating and deformation of the plate. A filter screen 5 is fixed to the top of the ventilation box 3. At the four ends of the bottom of the cooling box 1, support legs 8 are fixed. The filter screen 5 effectively prevents external dust from entering the inside of the cooling box 1 and avoids a large amount of dust being adsorbed on the surface of the polycarbonate plate, thereby causing dust in the coolant; The multi-stage filtration design of the filter screen 5 and the filter plate can effectively intercept particles with a particle size greater than 50 μm, ensuring the cleanliness of the coolant and the drying system, In the middle of the inside of the cooling box 1, a partition 10 is fixed. The inner side of the partition 10 is slidably connected to the U-shaped block 7; Specifically, when the polycarbonate plate after spraying the coolant passes through the partition 10 and reaches the other end inside the cooling box 1, the heating tube 25 is started to generate a large amount of heat at this time. Then, the fan 24 is started to blow the heat dissipated by the heating tube 25 onto the surface of the polycarbonate plate, so as to blow off the coolant on the surface of the polycarbonate plate, and the heat in the wind effectively dries part of the coolant, thereby effectively ensuring the dryness of the surface of the polycarbonate plate.

[0027] The use process of a polycarbonate plate production cooling device provided by the present invention is as follows: The carbonate plate is output from the extrusion head die and enters the cooling box 1. Then, the servo motor 12 drives the rotation of the positive and negative threaded rod 11, driving the linkage block 9 to slide along the guide rail 4 to adjust the distance between the U-shaped blocks 7 to adapt to the size and height of different polycarbonate plates. Then, the electric roller 15 is started to convey the polycarbonate plate. The guide roller 14 applies a constant pressure to the plate under the action of the spring 17 to ensure stable conveyance. The coolant is pressurized by the water pump 20 from the water tank 2 and conveyed to the deflector 21, and the nozzle 22 evenly sprays the coolant on the surface of the polycarbonate plate to form a water curtain for covering and cooling. The heat-exchanged coolant flows down from the surface of the plate and returns to the water tank 2 through the flow holes 19. The coolant is filtered by the filter plate to remove impurities and dust to ensure the cleanliness of the coolant. The cooling tube 23 cools the returned coolant to restore it to the set temperature to complete the cycle. The cooled plate passes through the partition 10 and enters the drying area. The heating tube 25 generates heat, and the fan 24 evenly blows the hot air onto the surface of the plate. The hot air evaporates the residual coolant on the surface of the plate to ensure the dryness of the surface of the plate.

[0028] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art in the technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A polycarbonate board production cooling device, characterized in that: The invention comprises a cooling box (1), wherein a plurality of U-shaped blocks (7) are arranged at the top and bottom of the cooling box (1), a plurality of electric rollers (15) are arranged inside the U-shaped blocks (7), two support plates (6) are fixed to the ends of the U-shaped blocks (7) at the top and bottom that are away from each other, linkage blocks (9) are fixed to both sides of the two support plates (6), guide rails (4) are provided at both ends of both sides of the cooling box (1), the inner sides of the guide rails (4) are slidably connected to the linkage blocks (9), a water tank (2) is fixed to the bottom end of the cooling box (1), three guide plates (21) are installed at one end of the cooling box (1), a plurality of nozzles (22) are fixed to the ends of two adjacent guide plates (21) that are close to each other, and adjustment mechanisms for driving the U-shaped blocks (7) at the top and bottom to be clamped according to the polycarbonate plate are arranged on both sides of the cooling box (1).

2. A polycarbonate board production cooling device according to claim 1, characterized in that: A spray mechanism for water-cooling the polycarbonate plate is provided on one side of the water tank (2), the spray mechanism comprising a water pump (20), the water pump (20) being fixed on one side of the water tank (2), the output end of the water pump (20) being fixedly connected to the guide plate (21) via a hose, and the output end of the water pump (20) being fixed to the water tank (2) via a conduit.

3. A polycarbonate board production cooling device according to claim 2, characterized in that: A cooling pipe (23) is mounted at the bottom end of the water tank (2), and a filter plate is fixed at the top end of the water tank (2).

4. A polycarbonate board production cooling device according to claim 2, characterized in that: The adjustment mechanism comprises a forward and reverse threaded rod (11), a servo motor (12) and a clamping assembly; both sides of the cooling box (1) are rotatably connected to the forward and reverse threaded rods (11); the top and bottom ends of the outer sides of the forward and reverse threaded rods (11) are respectively threadedly connected to the top and bottom linkage blocks (9); the top ends of the two forward and reverse threaded rods (11) are rotatably connected via a transmission belt; a servo motor (12) is fixed to one side of the cooling box (1); and the output end of the servo motor (12) is fixedly connected to one of the forward and reverse threaded rods (11).

5. A polycarbonate board production cooling device according to claim 4, characterized in that: A clamping assembly for applying pressure to the polycarbonate plate is arranged inside the U-shaped block (7), the clamping assembly comprising a U-shaped clamping plate (13), a guide roller (14), a guide rod (16), a spring (17) and an L-shaped block (18), both sides of the interior of the U-shaped block (7) are slidably connected to the U-shaped clamping plate (13), and the interior of the U-shaped clamping plate (13) is rotatably connected to a plurality of guide rollers (14).

6. A polycarbonate board production cooling device according to claim 5, characterized in that: L-shaped blocks (18) are fixed on both sides of the U-shaped block (7); a plurality of guide rods (16) are slidably connected inside the L-shaped block (18); one end of the guide rod (16) away from the L-shaped block (18) is fixed to the U-shaped clamping plate (13); a spring (17) is sleeved on the outer side of the guide rod (16); one end of the spring (17) is fixed to the U-shaped clamping plate (13); and the other end of the spring (17) is fixed to the L-shaped block (18).

7. A polycarbonate board production cooling device according to claim 5, characterized in that: The bottom ends of the two U-shaped blocks (7) at the bottom are provided with flow holes (19).

8. A polycarbonate board production cooling device according to claim 2, characterized in that: The other end of the top of the cooling box (1) is provided with a drying mechanism for air-drying the polycarbonate plate, the drying mechanism comprising a fan (24) and a heating tube (25); a ventilation box (3) is fixed to the other end of the top of the cooling box (1); a plurality of heating tubes (25) are installed inside the ventilation box (3); and a fan (24) is installed inside the ventilation box (3) and above the heating tube (25).

9. A polycarbonate board production cooling device according to claim 8, characterized in that: A filter screen (5) is fixed to the top of the ventilation box (3), and support legs (8) are fixed to the four ends of the bottom of the cooling box (1).

10. A polycarbonate board production cooling device according to claim 8, characterized in that: A partition plate (10) is fixed in the middle of the cooling box (1), and the inner side of the partition plate (10) is slidably connected to the U-shaped block (7).

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