Polyurethane film production equipment for uniform drying and rapid cooling pretreatment

Abstract

The invention relates to the technical field of polyurethane film production equipment, in particular to uniform drying and rapid cooling pretreatment polyurethane film production equipment which comprises a drying device and a cooling device, and the drying device comprises a drying box, a film guide mechanism and a drying mechanism; the number of the film guiding mechanisms is three, each film guiding mechanism comprises a moving plate, two guiding rollers and a lifting driving structure, the moving plates are parallel to the inner wall of the drying box, the two guiding rollers are arranged in parallel, and the lifting driving structures are used for driving the moving plates to move in the vertical direction; the drying mechanism comprises a drying structure, the drying structure comprises two U-shaped plates and four hot air bins, the two U-shaped plates are arranged between the two adjacent film guiding mechanisms respectively, the upper side and the lower side of the film are covered with the two ends of each U-shaped plate respectively, and the four hot air bins are arranged at the two ends of the two U-shaped plates respectively; the drying box, the film guiding mechanism and the drying mechanism are arranged, so that the upper and lower surfaces of the film are uniformly dried.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane film production equipment, in particular to polyurethane film production equipment with uniform drying and rapid cooling pretreatment. Background Art

[0002] As a high-performance material, polyurethane film is widely used in many fields such as packaging, construction, and automobile manufacturing. The drying and cooling pretreatment steps in its production process have an important impact on the quality and performance of the final product.

[0003] The patent with announcement number CN212253531U is a polyurethane film soil layer baking equipment. When drying and cooling the film, the single door is opened to insert the polyurethane film, and then the single door is closed, the fan and the heating wire are turned on, and the external air is sucked into the heating tube when the fan rotates, and then the air is blown into the hot air cavity after being heated by the heating wire. Because the partition wall surface of the hot air cavity and the drying cavity is evenly provided with air outlet holes, the air inside the hot air cavity is sprayed out through the air outlet holes to perform hot air baking on the upper and lower surfaces of the polyurethane film. At the same time, because the guide rollers are arranged obliquely symmetrically and the polyurethane film passes through the surface of the guide rollers, the residence time of the polyurethane film in the drying cavity is increased by the arrangement of the guide rollers, thereby effectively drying the polyurethane film.

[0004] The above patent has the following problems: the film moves in multiple layers from top to bottom in the drying chamber. Although the drying time of the film is increased, the drying chamber needs to be at a higher height to accommodate the multiple layers of film arranged up and down. In the drying chamber, the air outlet at the lower part of the drying chamber is far away from the lower surface of the top film. When the high-temperature air blown out from the lower part of the drying chamber moves upward to the lower surface of the top film, there will be heat loss, while the air outlet at the upper part of the drying chamber is close to the upper surface of the top film, and the heat loss of the high-temperature air blown out by the air outlet is small, resulting in a large temperature difference between the upper and lower surfaces of the film, causing uneven heating of the upper and lower surfaces of the film. Summary of the invention

[0005] In view of the above problems, a polyurethane film production device with uniform drying and rapid cooling pretreatment is provided. The present invention is provided with a drying box, a film guiding mechanism and a drying mechanism, so as to achieve uniform drying of the upper and lower surfaces of the film.

[0006] In order to solve the problems of the prior art, the present invention provides a polyurethane film production equipment with uniform drying and rapid cooling pretreatment, comprising a drying device for drying the film and a cooling device for cooling the film, the drying device comprising a drying box, a film guiding mechanism and a drying mechanism; the two ends of the drying box are respectively a feeding end and a discharging end; there are three film guiding mechanisms, and the three film guiding mechanisms are arranged at equal intervals inside the drying box, the film guiding mechanism comprises a movable plate, two guide rollers and a lifting drive structure, the movable plate is parallel to the inner wall of the drying box, the two guide rollers are arranged in parallel, and one end of the guide roller is connected to the movable plate, the lifting drive structure is arranged at one end of the movable plate, and the lifting drive structure is used to drive the movable plate to move in a vertical direction; the drying mechanism comprises a drying structure, the drying structure comprises two U-shaped plates and four hot air bins, the two U-shaped plates are respectively arranged between two adjacent film guiding mechanisms, the two ends of the U-shaped plate are respectively covered on the upper and lower sides of the film, and the four hot air bins are respectively arranged at the two ends of the two U-shaped plates.

[0007] Preferably, the drying mechanism also includes a synchronous guiding structure, which has two synchronous guiding structures, which are respectively arranged between two adjacent film guiding mechanisms. The synchronous guiding structure includes a guide plate and a limiting shaft. One end of the guide plate is axially connected to the movable plate located on the inner side, and a strip slide groove is provided on the guide plate. The two ends of the U-shaped plate are respectively abutted against the upper and lower sides of the guide plate; one end of the limiting shaft is connected to the movable plate located on the outer side, and the other end of the limiting shaft is slidably arranged in the strip slide groove.

[0008] Preferably, the drying structure also includes a mounting block and two connecting shafts; the two ends of the mounting block correspond to the two U-shaped plates respectively; the two connecting shafts are arranged parallel to each other, one end of the connecting shaft is connected to the U-shaped plate, and the other end of the connecting shaft is rotatably connected to the mounting block.

[0009] Preferably, the drying structure also includes a second spacing adjustment structure, and there are four second spacing adjustment structures. The four second spacing adjustment structures are respectively arranged in the middle of the four hot air bins, and the second spacing adjustment structure is used to adjust the distance between the hot air bin and the film surface.

[0010] Preferably, both ends of the second spacing adjustment structure are provided with a limiting guide structure, the limiting guide structure includes a limiting guide column, one end of the limiting guide column is connected to the U-shape, and the other end of the limiting guide column passes through the hot air bin and is slidably connected to the hot air bin.

[0011] Preferably, the drying mechanism also includes a telescopic structure, which is arranged on one side of the drying box, and the telescopic structure includes a frame, a third moving block, a second driving plate and a telescopic driving structure; both ends of the frame are connected to the drying box; there are two third moving blocks, and the two third moving blocks are respectively located on the upper and lower sides of the mounting block; there are two second driving plates, and the two second driving plates correspond to the two third moving blocks respectively, and the two ends of the second driving plate are respectively hinged to the third moving block and the third moving block; the telescopic driving structure is arranged on the side of the frame away from the drying box, and the telescopic driving structure is used to drive the two third moving blocks to move away from and close to each other.

[0012] Preferably, the telescopic structure further comprises a guide plate, the middle portion of the guide plate is connected to the frame, and guide holes are provided at both ends of the guide plate.

[0013] Preferably, the drying structure further comprises a limiting connection structure, and there are two limiting connection structures, which are respectively arranged at two ends of the mounting block.

[0014] Preferably, the film guiding mechanism further comprises a first spacing adjustment structure, which is arranged on the movable plate and is used for simultaneously adjusting the two guide rollers to move away from and closer to each other.

[0015] Preferably, the lifting drive structure includes a telescopic guide column, both ends of which are respectively connected to the movable plate and the drying box, and the telescopic guide column is used to limit the moving direction of the movable plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with a drying box, a film guiding mechanism and a drying mechanism. The three film guiding mechanisms adjust the moving path of the film to an inverted V shape, thereby increasing the residence time of the film in the drying box and improving the drying efficiency. The film passes through the middle of the U-shaped plate, and the two hot air bins are respectively arranged at both ends of the U-shaped plate, so that the upper and lower surfaces of the film can contact with the high-temperature airflow, and the distance between the hot air bin and the film surface is precisely controlled and kept consistent, thereby avoiding the problem of uneven heat distribution caused by uneven distance, and the closer distance between the hot air bin and the lower surface of the film reduces the heat loss of the high-temperature airflow during the upward movement, ensuring that the upper and lower surfaces of the film can be evenly heated, thereby achieving uniform drying of the upper and lower surfaces of the film.

[0017] 2. The present invention is provided with a synchronous guiding structure, and the film is stably placed between two film guiding mechanisms. Under the constraint of the limiting axis, the guide plate can automatically adjust its center plane to be flush with the center plane of the film, so that the hot air chamber can be parallel to the film at any tilt angle, avoiding the problem of uneven drying caused by angle deviation.

[0018] 3. The present invention is provided with a second spacing adjustment structure, and four second spacing adjustment structures are respectively arranged in the middle of the four hot air bins, realizing the independent adjustment capability of the hot air bins on the upper and lower sides of the film, so that when the distances between the upper and lower surfaces of the film and the two hot air bins are different, the corresponding hot air bin spacings can be adjusted respectively to ensure that a uniform and appropriate distance is maintained between the hot air bins and the film. By adjusting the distance between the hot air bins and the film, the temperature distribution on the film surface can be effectively controlled, thereby realizing the drying of films of different thicknesses and materials, and improving the versatility and adaptability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of a polyurethane film production device with uniform drying and rapid cooling pretreatment.

[0020] Figure 2 It is a right view of a polyurethane film production equipment for uniform drying and rapid cooling pretreatment.

[0021] Figure 3 yes Figure 2 Stereoscopic cross-sectional view at AA in the middle.

[0022] Figure 4 The present invention is a three-dimensional diagram of a film guiding mechanism and a drying mechanism in a polyurethane film production device for uniform drying and rapid cooling pretreatment.

[0023] Figure 5 The present invention is a three-dimensional diagram of a moving plate, a guide roller, a U-shaped plate and a synchronous guide structure in a polyurethane film production equipment for uniform drying and rapid cooling pretreatment.

[0024] Figure 6 The present invention is a stereoscopic diagram of a U-shaped plate, a hot air chamber, a mounting block and a connecting shaft in a polyurethane film production equipment for uniform drying and rapid cooling pretreatment.

[0025] Figure 7 It is a three-dimensional structure of U-shaped plate, hot air chamber, second spacing adjustment structure and limit guide structure in the production equipment of polyurethane film with uniform drying and rapid cooling pretreatment. Figure 1 .

[0026] Figure 8 It is a three-dimensional structure of U-shaped plate, hot air chamber, second spacing adjustment structure and limit guide structure in the production equipment of polyurethane film with uniform drying and rapid cooling pretreatment. Figure 2 .

[0027] Fig. 9 It is a three-dimensional diagram of a U-shaped plate, a mounting block, a connecting shaft and a telescopic structure in a polyurethane film production equipment for uniform drying and rapid cooling pretreatment.

[0028] Fig.10The present invention is an exploded view of a mounting block, a connecting shaft and a limit connection structure in a polyurethane film production device for uniform drying and rapid cooling pretreatment.

[0029] Fig.11 The present invention is a stereoscopic diagram of a guide roller and a first spacing adjustment structure in a polyurethane film production device for uniform drying and rapid cooling pretreatment.

[0030] Fig.12 The present invention is a three-dimensional diagram of a first spacing adjustment structure in a polyurethane film production device for uniform drying and rapid cooling pretreatment.

[0031] Fig.13 It is a three-dimensional diagram of the moving plate, guide rollers and lifting drive structure in a polyurethane film production equipment for uniform drying and rapid cooling pretreatment.

[0032] The numbers in the figure are: 1, drying box; 2, film guiding mechanism; 21, moving plate; 22, guide roller; 23, lifting drive structure; 231, telescopic guide column; 24, first spacing adjustment structure; 241, first rectangular frame; 242, first double-headed screw; 243, limit rod; 244, first moving block; 3, drying mechanism; 31, drying structure; 311, U-shaped plate; 312, hot air bin; 313, mounting block; 314, connecting shaft; 3141, annular groove; 315, second spacing adjustment structure; 3151, second rectangular frame; 3152, second double-headed screw; 3153, second moving block; 3154, first drive plate; 316, limit guide structure; 3161, limit guide column; 317, limit connection structure; 3171, annular block; 3172, limit plug rod; 32, synchronous guide structure; 321, guide plate; 3211, strip slide; 322, limit shaft; 33, telescopic structure; 331, frame; 332, third moving block; 333, second drive plate; 334, telescopic drive structure; 3341, third double-headed screw; 335, guide plate; 3351, guide hole; 4, cooling box; 5, cooling structure. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Reference Figures 1 to 13As shown: a polyurethane film production equipment for uniform drying and rapid cooling pretreatment, including a drying device for drying the film and a cooling device for cooling the film, the drying device includes a drying box 1, a film guiding mechanism 2 and a drying mechanism 3; the two ends of the drying box 1 are respectively a feeding end and a discharging end, and a replacement groove is opened on the side of the drying box 1, and the two ends of the replacement groove extend to the feeding end and the discharging end respectively; the film guiding mechanism 2 has three, and the three film guiding mechanisms 2 are arranged at equal intervals inside the drying box 1, and the film guiding mechanism 2 includes a moving plate 21, two guide rollers 22 and a lifting drive structure 23, the moving plate 21 is parallel to the inner wall of the drying box 1, the two guide rollers 22 are arranged in parallel, and one end of the guide roller 22 is connected to the moving plate 21 Next, the lifting drive structure 23 is arranged at one end of the movable plate 21, and the lifting drive structure 23 is used to drive the movable plate 21 to move in the vertical direction; the drying mechanism 3 includes a drying structure 31, and the drying structure 31 includes two U-shaped plates 311 and four hot air bins 312. The two U-shaped plates 311 are respectively arranged between two adjacent film guiding mechanisms 2, and the two ends of the U-shaped plates 311 are respectively covered on the upper and lower sides of the film, and the four hot air bins 312 are respectively arranged at the two ends of the two U-shaped plates 311. The cooling device includes a cooling box 4 and a cooling structure 5. The cooling box 4 is arranged at the discharge end of the drying box 1, and the cooling structure 5 is arranged in the cooling box 4. In the process of the film moving from one end of the cooling box 4 to the other end, the cooling structure 5 cools the film.

[0035] A plurality of drying devices can be appropriately connected in series according to the usage scenario. The polyurethane film is smoothly introduced from the feed end of the drying box 1. At the same time, the three film guiding mechanisms 2 are at the same height to ensure that the film can enter smoothly and move along the preset path. As the film enters, the film guiding mechanism 2 located inside the drying box 1 responds first, and its lifting drive structure 23 drives the movable plate 21 to move upward, and drives the film to bend upward through the guide roller 22. At the same time, the film guiding mechanisms 2 located on both sides move synchronously but in opposite directions, that is, the lifting drive structure 23 drives the movable plate 21 to move downward, so that the film bends downward at these two points, forming a stable inverted V-shaped moving path in the drying box 1, thereby extending the residence time of the film in the drying box 1 and improving the drying efficiency. When moving on the V-shaped path, its upper and lower surfaces are respectively facing the hot air bins 312 at the two ends of the two U-shaped plates 311. Since the distance between the hot air bins 312 and the surface of the film is precisely controlled and kept consistent, the high-temperature airflow can quickly and evenly cover the entire surface of the film. The fully dried film then enters the cooling box 4, and the cooling structure 5 immediately performs rapid cooling treatment on the film, so that the film quickly cools down and solidifies its shape to prepare for subsequent processing or application. Since the distance between the hot air bin 312 and the lower surface of the film is relatively close, the high-temperature airflow blown out by the hot air bin 312 acts on the lower surface of the film before the heat is lost, which can avoid the heat loss caused by the upward movement of the high-temperature airflow, thereby achieving uniform heating of the upper and lower surfaces of the film, and making the upper and lower surfaces of the film evenly dried.

[0036] Reference Figure 4 and Figure 5 As shown: the drying mechanism 3 also includes a synchronous guiding structure 32, which has two synchronous guiding structures 32. The two synchronous guiding structures 32 are respectively arranged between two adjacent film guiding mechanisms 2. The synchronous guiding structure 32 includes a guide plate 321 and a limiting shaft 322. One end of the guide plate 321 is axially connected to the movable plate 21 located on the inner side. A strip slide groove 3211 is provided on the guide plate 321. The two ends of the U-shaped plate 311 are respectively abutted against the upper and lower sides of the guide plate 321; one end of the limiting shaft 322 is connected to the movable plate 21 located on the outer side, and the other end of the limiting shaft 322 is slidably arranged in the strip slide groove 3211. When the film between the two film guiding mechanisms 2 is horizontal, the guide plate 321 is limited by the limiting shaft 322, and the middle surface of the guide plate 321 is parallel to the film.

[0037] When adjusting the film moving path, the three film guiding mechanisms 2 will also adjust the tension of the film. The three film guiding mechanisms 2 need to be adjusted according to the tension of the film. Therefore, the positions of the three film guiding mechanisms 2 are not swapped between fixed points. The two hot air bins 312 located on the upper and lower sides of the film may not be parallel to the film. By setting a synchronous guiding structure 32, the film is stably placed between the two film guiding mechanisms 2 and adjusted to a horizontal state. At this time, the guide plate 321 in the synchronous guiding structure 32, under the constraint of the limit shaft 322, its center plane is automatically flush with the center plane of the film. As production needs change, the three film guiding mechanisms 2 may need to adjust their positions to change the moving path and tension of the film. When the film guiding mechanism 2 moves in the opposite direction, the strip slide groove 3211 on the guide plate 321 is tightly matched with the limit shaft 322. When the film guiding mechanism 2 stops moving, the guide plate 321 can stop flexibly at any tilt angle, and the center plane always remains parallel to the center plane of the film. The two ends of the U-shaped plate 311 are tightly abutted against the upper and lower sides of the guide plate 321, so that the U-shaped plate 311 can move synchronously with the movement of the guide plate 321. Since the U-shaped plate 311 is directly connected to and supports the hot air bin 312, the position of the hot air bin 312 is also adjusted accordingly to ensure that the hot air bin 312 always remains parallel to the film, thereby achieving that the hot air bin 312 can be parallel to the film at any tilt angle, avoiding uneven drying problems caused by angle deviation.

[0038] Reference Figure 4 and Figure 6 As shown: the drying structure 31 also includes a mounting block 313 and two connecting shafts 314; the two ends of the mounting block 313 correspond to the two U-shaped plates 311 respectively; the two connecting shafts 314 are arranged parallel to each other, one end of the connecting shaft 314 is connected to the U-shaped plate 311, and the other end of the connecting shaft 314 is rotatably connected to the mounting block 313.

[0039] When the film between the two film guiding mechanisms 2 is in an ideal horizontal state, the axis of the connecting shaft 314 accurately passes through the center plane of the film, providing a reference for subsequent dynamic adjustment. As the production process changes, the two film guiding mechanisms 2 may need to be adjusted in position as needed. When the state of the film changes, the two film guiding mechanisms 2 drive the guide plate 321 to move, the guide plate 321 drives the U-shaped plate 311 to rotate, and the U-shaped plate 311 drives the connecting shaft 314 to rotate around the axis of the connecting shaft 314. In this process, the mounting block 313 acts as a stabilizer to strictly limit the movement range of the connecting shaft 314, ensuring that the connecting shaft 314 can only rotate along its own axis, avoiding unnecessary displacement and vibration of the connecting shaft 314, thereby ensuring that the hot air chamber 312 can follow the guide plate 321 to adjust its own state and keep the hot air chamber 312 parallel to the film.

[0040] Reference Figure 4 , Figure 7 and Figure 8 As shown: the drying structure 31 also includes a second spacing adjustment structure 315, the second spacing adjustment structure 315 has four, the four second spacing adjustment structures 315 are respectively arranged in the middle of the four hot air bins 312, the second spacing adjustment structure 315 is used to adjust the distance between the hot air bin 312 and the film surface, the second spacing adjustment structure 315 includes a second rectangular frame 3151, a second double-headed screw 3152, two second moving blocks 3153 and two first driving plates 3154, the second rectangular frame 3151 is installed in the middle of the hot air bin 312, the two ends of the second double-headed screw 3152 are respectively connected to the two ends of the second rectangular frame 3151, the two second moving blocks 3153 are respectively connected to the two ends of the second double-headed screw 3152, the two first driving plates 3154 correspond to the two second moving blocks 3153, and the two ends of the first driving plate 3154 are respectively hinged to the second moving block 3153 and the U-shaped plate 311.

[0041] Before starting the drying operation, the positions of the second double-headed screws 3152 in the four second spacing adjustment structures 315 are preliminarily set according to the approximate thickness of the film to be dried and the expected drying effect, so that the hot air chamber 312 maintains a preliminary safe and effective distance from the surface of the film. As the drying process proceeds, the temperature change on the surface of the film is monitored by visual inspection or using a temperature sensor. Once it is found that the surface temperature of the film has an upward trend and may be close to its heat resistance limit, or if it is observed that the film has slight signs of deformation, the spacing adjustment is required. By rotating the second double-headed screw 3152 and utilizing its thread transmission principle, the two second moving blocks 3153 are pushed to move axially along the second double-headed screw 3152. Since the two first drive plates 3154 are respectively hinged to the second moving block 3153 and the U-shaped plate 311, when the second moving block 3153 When they are close to each other, the angle between the first drive plates 3154 decreases, and this movement is converted into the lifting movement of the hot air bin 312, so that the hot air bin 312 moves upward as a whole, thereby increasing the distance between it and the surface of the film. Conversely, if the distance needs to be reduced, the second double-headed screw 3152 is rotated in the opposite direction. Since the four second spacing adjustment structures 315 are respectively arranged in the middle of the four hot air bins 312, the independent adjustment capability of the hot air bins 312 on the upper and lower sides of the film is realized. When the distance between the upper and lower surfaces of the film and the two hot air bins 312 is different, the corresponding spacing between the hot air bins 312 can be adjusted respectively to ensure that the hot air bin 312 and the film maintain a uniform and appropriate distance, thereby effectively preventing the film from being deformed due to local overheating, thereby realizing the drying of films of different thicknesses and materials, thereby improving the versatility and adaptability of the equipment.

[0042] Reference Figure 7 and Figure 8As shown: both ends of the second spacing adjustment structure 315 are provided with a limiting guide structure 316, the limiting guide structure 316 includes a limiting guide column 3161, one end of the limiting guide column 3161 is connected to the U-shape, and the other end of the limiting guide column 3161 passes through the hot air bin 312 and is slidably connected to the hot air bin 312.

[0043] When installing the second spacing adjustment structure 315, one end of the limiting guide column 3161 is firmly connected to the U-shaped plate 311, and the other end passes through the reserved hole of the hot air bin 312 to form a sliding connection with the hot air bin 312, and ensures smooth and unobstructed sliding between the limiting guide column 3161 and the hot air bin 312. In the process of the hot air bin 312 approaching or moving away from the film, even if there is slight external force interference or mechanical vibration, the limiting guide structure 316 can effectively suppress the shaking and deviation of the hot air bin 312, and the hot air bin 312 moves smoothly along the axial direction of the limiting guide column 3161, maintaining the uniformity and consistency of the distance between the hot air bin 312 and the film, so that the hot air can act evenly on the surface of the film, thereby avoiding the problems of excessive temperature and film deformation caused by the local distance being too close.

[0044] Reference Figure 4 and Fig. 9 As shown: the drying mechanism 3 also includes a telescopic structure 33, which is arranged on one side of the drying box 1, and the telescopic structure 33 includes a frame 331, a third moving block 332, a second driving plate 333 and a telescopic driving structure 334; both ends of the frame 331 are connected to the drying box 1; there are two third moving blocks 332, and the two third moving blocks 332 are respectively located on the upper and lower sides of the mounting block 313; there are two second driving plates 333, and the two second driving plates 333 correspond to the two third moving blocks 332 respectively, and the two ends of the second driving plate 333 are respectively hinged to the third moving block 332 and the third moving block 332; the telescopic driving structure 334 is arranged on the side of the frame 331 away from the drying box 1, and the telescopic driving structure 334 is used to drive the two third moving blocks 332 to move away from and approach each other, and the telescopic driving structure 334 includes a third double-headed screw 3341, and the two ends of the third double-headed screw 3341 are respectively connected to the two third moving blocks 332.

[0045] Hot air bins 312 are provided on both sides of the film moving path, and the distance between the two hot air bins 312 is relatively close, which makes it inconvenient for the staff to install the dried film into the drying device. Therefore, a telescopic structure 33 is provided. When the film to be dried needs to be installed, the staff first starts the telescopic driving structure 334, and the third double-headed screw 3341 starts to rotate, driving the two third moving blocks 332 to move away from each other along the axial direction of the screw. As the third moving block 332 moves, the angle between the two second driving plates 333 gradually increases. The two ends of the plate 333 are respectively hinged to the third moving block 332 and the mounting block 313, so the change in the angle will be converted into the horizontal movement of the mounting block 313. Specifically, the mounting block 313 will be pulled by the two second driving plates 333 to move toward the inside of the bracket, and the mounting block 313 drives the hot air bin 312 to move through the connecting shaft 314, so that the hot air bin 312 is away from the film, and the two adjacent film guiding mechanisms 2 are in an open state, thereby providing a larger operating space for the installation of the film, significantly improving the convenience and efficiency of the operation.

[0046] Reference Fig. 9 As shown, the telescopic structure 33 also includes a guide plate 335 , the middle portion of the guide plate 335 is connected to the frame 331 , guide holes 3351 are provided at both ends of the guide plate 335 , and two connecting shafts 314 are slidably disposed in the two guide holes 3351 , respectively.

[0047] The U-shaped plate 311 and the hot air bin 312 on one side of the mounting block 313 have a large mass, so that one side of the mounting block 313 is subjected to a large downward force, which easily causes the mounting block 313 to tilt, and then causes the hot air bin 312 to be not parallel to the hot air bin 312. Therefore, a guide plate 335 is provided, and the connecting shaft 314 is slidably connected to the guide hole 3351 on the guide plate 335. When the U-shaped plate 311 and the hot air bin 312 on one side of the mounting block 313 generate a downward force due to their large mass, one end of the connecting shaft 314 will naturally be subject to an upward tilting tendency, and the existence of the guide hole 3351 effectively limits the tilting, forcing the connecting shaft 314 to move only in a straight line along its axis, thereby ensuring that the two ends of the mounting block 313 can always maintain relative balance during the extension and retraction process, avoiding the tilting problem caused by uneven weight.

[0048] Reference Fig. 9 and Fig.10As shown: the drying structure 31 also includes a limiting connection structure 317, which has two limiting connection structures 317. The two limiting connection structures 317 are respectively arranged at both ends of the mounting block 313. The limiting connection structure 317 includes an annular block 3171 and a plurality of limiting plug rods 3172. An annular groove 3141 is provided on the surface of the connecting shaft 314. The annular block 3171 is connected to the mounting block 313. A plurality of limiting plug rods 3172 are arranged in an annular array on the annular block 3171. One end of the limiting plug rod 3172 is inserted into the annular groove 3141 along the diameter direction of the annular block 3171.

[0049] When the hot air chamber 312 is adjusted in position or angle according to process requirements, it is connected to the connecting shaft 314 through the U-shaped plate 311, and the adjustment force is transmitted to the connecting shaft 314. At this time, the connecting shaft 314 will rotate with its connection with the mounting block 313 as the axis to adapt to the change of the hot air chamber 312, and the annular block 3171 is firmly connected to the mounting block 313. When the telescopic structure 33 drives the mounting block 313 to move, the mounting block 313 will drive the connecting shaft 314 to move. The mounting block 313 needs to adjust the connecting shaft 314. 14 applies a force along the axial direction of the connecting shaft 314. By setting a limit connection structure 317, when the connecting shaft 314 rotates, with the cooperation of the annular groove 3141 and a plurality of limit plug rods 3172, the connecting shaft 314 can be kept in a fixed position for rotation. When the mounting block 313 moves, the mounting block 313 applies a force along the axial direction of the connecting shaft 314 through the limit plug rod 3172, driving the connecting shaft 314 to move, thereby realizing a variety of transmission connections between the connecting shaft 314 and the mounting block 313.

[0050] Reference Figure 4 , Fig.11 and Fig.12 As shown: the film guiding mechanism 2 also includes a first spacing adjustment structure 24, which is arranged on the movable plate 21. The first spacing adjustment structure 24 is used to simultaneously adjust the two guide rollers 22 to move away from and closer to each other. The first spacing adjustment structure 24 includes a first rectangular frame 241, a first double-headed screw 242, a limiting rod 243 and two first moving blocks 244. The first rectangular frame 241 is installed on the movable plate 21, the first double-headed screw 242 is arranged on one side of the first rectangular frame 241, the limiting rod 243 is arranged on the other side of the first rectangular frame 241, and the two first moving blocks 244 are symmetrically arranged inside the first rectangular frame 241. The two ends of the first moving block 244 are respectively connected to the first double-headed screw 242 and the limiting rod 243, and the two guide rollers 22 are respectively installed on the two first moving blocks 244.

[0051] When the film thickness increases, the first spacing adjustment structure 24 works, the first double-headed screw 242 rotates to drive the two first moving blocks 244 to move, and the two first moving blocks 244 move away from each other synchronously under the limiting action of the limit rod 243, and the two first moving blocks 244 simultaneously drive the two guide rollers 22 to move away from each other, and the two guide rollers 22 change the distance between themselves and the middle surfaces of the two guide rollers 22 at the same time, so that the distance between the two guide rollers 22 and the middle surfaces is the same, so that the middle surfaces of films of different thicknesses are always coplanar with the middle surfaces of the two guide rollers 22, thereby achieving that the middle surfaces of films of different thicknesses are always flush with the middle surface of the guide plate 321.

[0052] Reference Figure 4 and Fig.13 As shown, the lifting drive structure 23 includes a telescopic guide column 231 , both ends of which are respectively connected to the moving plate 21 and the drying box 1 , and the telescopic guide column 231 is used to limit the moving direction of the moving plate 21 .

[0053] The drying structure 31 will exert a force on the guide plate 321, and the guide plate 321 will transfer the force to the two film guiding mechanisms 2 connected thereto. The two film guiding mechanisms 2 have a tendency to move toward each other, which will cause the lifting drive structure 23 to be subjected to a force perpendicular to its driving direction. By setting a telescopic guide column 231, when the telescopic drive structure 334 drives the movable plate 21 to move, the movable plate 21 will transfer the force to the telescopic guide column 231, and the telescopic guide column 231 will be correspondingly extended and retracted in the direction of its axis, so that the movable plate 21 maintains vertical movement under the action of the telescopic guide column 231, thereby preventing the movable plate 21 from being offset by a force perpendicular to its moving direction.

[0054] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A polyurethane film production device for uniform drying and rapid cooling pretreatment, comprising a drying device for drying the film and a cooling device for cooling the film, characterized in that: The drying device comprises a drying box, a film guiding mechanism and a drying mechanism; The two ends of the drying box are the feeding end and the discharging end respectively; There are three film guiding mechanisms, which are arranged at equal intervals inside the drying box. The film guiding mechanisms include a moving plate, two guide rollers and a lifting drive structure. The moving plate is parallel to the inner wall of the drying box, the two guide rollers are arranged in parallel, and one end of the guide roller is connected to the moving plate. The lifting drive structure is arranged at one end of the moving plate, and the lifting drive structure is used to drive the moving plate to move in the vertical direction. The drying mechanism includes a drying structure, which includes two U-shaped plates and four hot air bins. The two U-shaped plates are respectively arranged between two adjacent film guiding mechanisms, and the two ends of the U-shaped plates are respectively covered on the upper and lower sides of the film. The four hot air bins are respectively arranged at the two ends of the two U-shaped plates.

2. The polyurethane film production equipment for uniform drying and rapid cooling pretreatment according to claim 1, characterized in that: The drying mechanism also includes a synchronous guide structure, which has two synchronous guide structures, which are respectively arranged between two adjacent film guide mechanisms, and the synchronous guide structure includes a guide plate and a limit shaft. One end of the guide plate is axially connected to the inner movable plate, a strip-shaped slide groove is provided on the guide plate, and the two ends of the U-shaped plate are respectively abutted against the upper and lower sides of the guide plate; One end of the limiting shaft is connected to the movable plate located at the outside, and the other end of the limiting shaft is slidably arranged in the strip sliding groove.

3. The polyurethane film production equipment for uniform drying and rapid cooling pretreatment according to claim 1, characterized in that: The drying structure also includes a mounting block and two connecting shafts; The two ends of the mounting block correspond to the two U-shaped plates respectively; The two connecting shafts are arranged parallel to each other, one end of the connecting shaft is connected to the U-shaped plate, and the other end of the connecting shaft is rotatably connected to the mounting block.

4. The polyurethane film production equipment for uniform drying and rapid cooling pretreatment according to claim 1, characterized in that: The drying structure also includes a second spacing adjustment structure, which has four second spacing adjustment structures. The four second spacing adjustment structures are respectively arranged in the middle of the four hot air bins, and the second spacing adjustment structures are used to adjust the distance between the hot air bins and the film surface.

5. The polyurethane film production equipment for uniform drying and rapid cooling pretreatment according to claim 4, characterized in that: Both ends of the second spacing adjustment structure are provided with a limiting guide structure, the limiting guide structure includes a limiting guide column, one end of the limiting guide column is connected to the U-shaped, and the other end of the limiting guide column passes through the hot air bin and is slidably connected to the hot air bin.

6. The polyurethane film production equipment for uniform drying and rapid cooling pretreatment according to claim 2, characterized in that: The drying mechanism also includes a telescopic structure, which is arranged on one side of the drying box, and includes a frame, a third moving block, a second driving plate and a telescopic driving structure; Both ends of the rack are connected to the drying box; There are two third moving blocks, which are respectively located at the upper and lower sides of the mounting block; There are two second driving plates, the two second driving plates correspond to the two third moving blocks respectively, and the two ends of the second driving plate are hinged to the third moving block and the third moving block respectively; The telescopic driving structure is arranged on a side of the frame away from the drying box, and is used for driving the two third moving blocks to move away from and towards each other.

7. The polyurethane film production equipment for uniform drying and rapid cooling pretreatment according to claim 6, characterized in that: The telescopic structure also includes a guide plate, the middle part of the guide plate is connected to the frame, and guide holes are provided at both ends of the guide plate.

8. The polyurethane film production equipment for uniform drying and rapid cooling pretreatment according to claim 3, characterized in that: The drying structure also includes a limiting connection structure. There are two limiting connection structures, and the two limiting connection structures are respectively arranged at two ends of the mounting block.

9. The polyurethane film production equipment for uniform drying and rapid cooling pretreatment according to claim 1, characterized in that: The film guiding mechanism also includes a first spacing adjustment structure, which is arranged on the movable plate and is used for simultaneously adjusting the two guide rollers to move away from and closer to each other.

10. The polyurethane film production equipment for uniform drying and rapid cooling pretreatment according to claim 1, characterized in that: The lifting drive structure comprises a telescopic guide column, both ends of which are respectively connected to the moving plate and the drying box, and the telescopic guide column is used to limit the moving direction of the moving plate.

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