Improved photovoltaic adhesive film forming device
By providing a first transport component in the photovoltaic film forming device, the film releases internal stress during natural cooling, the problem of adhesive film and unstable molding is solved, and the life of the cold roller is extended and the molding quality is improved.
Patent Information
- Application Number
- CN202411653122.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-02-07
AI Technical Summary
During the photovoltaic film forming process, the film is prone to stick to the surface of the extrusion roller, resulting in wrinkles, holes or rolls, affecting the forming stability and flatness.
By providing a first transport assembly between the calender assembly and the die head, the adhesive film that has just exited the die head can release internal stress while cooling naturally, extend the trial life of the first cold roller, and improve the stability of the adhesive film forming.
The trial life of the first cold roller is extended, the stability of the adhesive film forming is improved, the occurrence of wrinkles and holes is reduced, and the flatness and molding quality of the photovoltaic adhesive film are ensured.
Smart Images
Figure CN119388717A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of adhesive film forming equipment in photovoltaic modules, and in particular to an improved photovoltaic adhesive film forming device. Background Art
[0002] Photovoltaic film is used to bond the glass and cells of the battery module. In order to prevent the photovoltaic film from slipping during the lamination process, a pattern of a certain shape and depth is usually set on the surface of the film. In the current production of photovoltaic film, the film is often formed by rolling two extrusion rollers behind the film extrusion die, and a certain pattern is formed on the film surface. However, since the photovoltaic film itself has a high viscosity in the melted state, and the extrusion temperature at the die is high, when the photovoltaic film is calendered by the two extrusion rollers, the film is easy to stick to the surface of the extrusion roller. Although the film can be forced to peel off from the roller surface after subsequent roller traction, the high temperature of the film during the peeling process will easily cause wrinkles or holes in the film, and even the film rolls due to excessive adhesion, resulting in the inability to carry out the entire extrusion molding process. At the same time, the stress generated in the photovoltaic film will increase during this process, and it cannot be effectively released during the subsequent processing, affecting the flatness of the film, thereby affecting the final molding of the photovoltaic film. Summary of the invention
[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an improved photovoltaic film forming device, which has the effect of extending the trial life of the first cold roller and improving the stability of film forming.
[0004] The above technical objectives of the present invention are achieved through the following technical solutions: An improved photovoltaic film forming device includes a device body, wherein the device body includes a calendering component, and a first transport component is arranged between the calendering component and a glue discharge die head. When the glue film just exits the glue discharge die head moves toward the calendering component as the first transport component moves, the glue film naturally cools and quickly releases its internal stress.
[0005] In a preferred example, the present invention can be further configured as follows: the first transport component includes a first frame, the first frame is arranged on a foundation, a first guide roller and a second guide roller are arranged on the upper half of the first frame, a plurality of auxiliary rollers are arranged between the first guide roller and the second guide roller, and a first belt is commonly arranged on the first guide roller, the second guide roller and the plurality of auxiliary rollers.
[0006] In a preferred example, the present invention can be further configured as follows: the calendering assembly includes a second frame, the second frame is fixedly arranged on a side of the first frame away from the rubber discharging die head, and the top of the second frame is provided with a first cooling roller, a second cooling roller and a third cooling roller in sequence along the moving direction of the rubber film; The first cooling roller, the second cooling roller and the third cooling roller are rotatably connected to the bearing seat through bearings, the bearing seats on the second cooling roller and the third cooling roller are fixed to the top of the second frame, and the bearing seat on the first cooling roller is slidably connected to the second frame; A motor is disposed on one side of the second frame, and an output end of the motor is connected to one end of the second cooling roller; The second frame is provided with a roller gap adjustment component, and the roller gap adjustment component drives the first cooling roller to move, thereby changing the distance between the first cooling roller and the second cooling roller.
[0007] In a preferred example, the present invention may be further configured as follows: a horizontal belt adjustment component is provided on the first frame, and the horizontal belt adjustment component drives the first guide roller to move; The first frame is also provided with a belt storage assembly; The horizontal belt adjustment assembly and the belt storage assembly jointly change the horizontal plane projection length of the first belt.
[0008] In a preferred example, the present invention can be further configured as follows: the horizontal belt adjustment assembly includes two screw modules, the two screw modules are fixedly arranged on the first frame, the first guide roller is rotatably connected to the bearing shaft through a bearing, and the bearing seat on the first guide roller is fixedly connected to the corresponding moving block in the screw module; The belt storage assembly comprises a fixed beam, the fixed beam is fixed on the first frame, two floating cylinders are symmetrically arranged on the fixed beam, and the output ends of the two floating cylinders are commonly connected to a movable beam; A plurality of auxiliary rollers are rotatably arranged on both the fixed beam and the movable beam, and the plurality of auxiliary rollers on the fixed beam and the movable beam are arranged in an up-and-down staggered manner.
[0009] In a preferred example, the present invention may be further configured as follows: the bottom of the first rack is flush with the bottom of the second rack; A track pair is arranged on the foundation, a first base is arranged on the track pair, the first base is slidably connected with the track pair, and a lifting part is arranged on the first base, the second frame and the second frame; A second base is also slidably arranged on the track pair, a third frame is fixedly arranged on the top of the second base, and the third frame is fixed to the first base via a connecting rod; A walking assembly is arranged on the second base; The travel assembly includes a drive motor, which is fixedly mounted on the second base. Two spur racks are symmetrically arranged on the foundation. Transmission shafts are arranged at both output ends of the drive motor. The transmission shafts are rotatably connected to bearing seats via bearings. The bearing seats on the transmission shafts are fixed to the second base. A travel gear is fixedly sleeved on each of the transmission shafts, and the travel gear is meshed with the corresponding spur rack.
[0010] In a preferred example, the present invention may be further configured as follows: the roller gap adjustment assembly includes an electric cylinder, and the electric cylinder is arranged on the second frame through a connecting seat; A linear guide is provided on the top of the second frame, a sliding block in the linear guide is fixed to the bearing seat on the first cooling roller, and an output end of the electric cylinder is connected to the sliding block; A distance sensor is provided on one side of one of the bearing seats on the second cooling roller close to the first cooling roller.
[0011] In a preferred example, the present invention may be further configured as follows: a cooling assembly is provided on the third rack; The cooling assembly includes a fourth cooling roller, a fifth cooling roller and a sixth cooling roller; The fourth cooling roller, the fifth cooling roller and the sixth cooling roller are all rotatably arranged on the bearing seats through bearings, and the bearing seats are all fixedly arranged on the third frame; The third frame is provided with three motors, and the output ends of the three motors are respectively connected to one end of the fourth cooling roller, the fifth cooling roller and the sixth cooling roller.
[0012] In a preferred example, the present invention can be further configured as follows: the first cooling roller, the second cooling roller, the third cooling roller, the fourth cooling roller, the fifth cooling roller and the sixth cooling roller all have eight spiral water inlet channels and eight spiral water return channels evenly arranged in their circumferential directions, and the eight water inlet channels and the eight water return channels on the same roller body are arranged at intervals.
[0013] In summary, the present invention includes at least one of the following beneficial technical effects: 1. By setting a first transport component between the calendering component and the die head, the film extruded from the die head moves on the first transport component, and releases its internal stress while cooling naturally. After the film leaves the die head for a certain distance, it is calendered and formed at a position far away from the die head by the first cooling roller and the second cooling roller, thereby extending the trial life of the first cooling roller and improving the stability of film forming.
[0014] 2. By providing a horizontal belt adjustment component and a belt storage component, the device body can adapt to the working environment of the assembly line, and the horizontal plane projection length of the first belt can be changed according to the speed of the assembly line. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 2 is a schematic diagram of the main structure of the present embodiment; Figure 2 yes Figure 1 A schematic diagram of a top view structure; Figure 3 yes Figure 1 A schematic diagram of the main half-section structure; Figure 4 yes Figure 3 The enlarged structural diagram at A in the middle; Figure 5 yes Figure 3 The enlarged structural diagram at B in the middle; Figure 6 yes Figure 3 The enlarged structural diagram at C in the middle; Figure 7 yes Figure 1 A schematic diagram of a partial top view of the structure of the walking assembly; Figure 8 Schematic diagram of the main structure of the roller body in this embodiment; Fig. 9 It is a schematic diagram of the left half-section structure of the roller body in this embodiment.
[0016] In the figure, 1. device body; 2. calendering assembly; 3. first transport assembly; 31. first frame; 311. first guide roller; 312. second guide roller; 313. first belt; 21. second frame; 22. first cooling roller; 23. second cooling roller; 24. third cooling roller; 4. roller gap adjustment assembly; 5. horizontal belt adjustment assembly; 6. belt storage assembly; 51. screw module; 61. fixed beam; 62. floating cylinder; 63. movable beam; 7. first base; 8. second base; 81. third frame; 9. travel assembly; 91. drive motor; 92. spur rack; 93. transmission shaft; 94. travel gear; 41. electric cylinder; 42. distance sensor; 10. cooling assembly; 101. fourth cooling roller; 102. fifth cooling roller; 103. sixth cooling roller. DETAILED DESCRIPTION
[0017] The present invention is further described in detail below in conjunction with the accompanying drawings.
[0018] Example: Reference Figure 1-Figure 4As shown, the improved photovoltaic film forming device disclosed in the present invention comprises a device body 1. The device body 1 comprises a calendering assembly 2. A first transport assembly 3 is arranged between the calendering assembly 2 and the dispensing die head. When the film just exiting the dispensing die head moves toward the calendering assembly 2 along with the first transport assembly 3, the film is naturally cooled and its internal stress is quickly released.
[0019] A track pair is arranged on the foundation. A first base 7 is arranged on the track pair. A plurality of wheels are arranged at the bottom of the first base 7, and the wheels form point contact with the track pair. The first base 7 moves along the direction where the track pair itself is located.
[0020] The first transport assembly 3 includes a first frame 31, and a plurality of lifting parts are arranged at the bottom of the first frame 31. The telescopic ends of the lifting parts are in contact with the top of the first base 7. The plurality of lifting parts are controlled simultaneously by the PLC program system to achieve height adjustment of the first frame 31.
[0021] The first frame 31 is provided with a first guide roller 311 and a second guide roller 312 in the upper half thereof, and a plurality of auxiliary rollers are provided between the first guide roller 311 and the second guide roller 312. The first guide roller 311, the second guide roller 312 and the plurality of auxiliary rollers have the same top height. The second guide roller 312 and the plurality of auxiliary rollers are all rotatably connected to the first frame 31.
[0022] A horizontal belt adjusting assembly 5 is disposed on the first frame 31 , and the horizontal belt adjusting assembly 5 drives the first guide roller 311 to move.
[0023] The first frame 31 is also provided with a belt storage assembly 6 .
[0024] The horizontal belt adjustment assembly 5 includes two screw modules 51, which are fixedly arranged on the first frame 31. The first guide roller 311 is rotatably connected to the bearing shaft through a bearing, and the bearing seat on the first guide roller 311 is fixedly connected to the corresponding moving block in the screw module 51. The PLC control program controls the motor in the screw module 51, thereby changing the position of the moving block, and finally drives the first guide roller 311 to move.
[0025] The belt storage assembly 6 includes a fixed beam 61. The fixed beam 61 is fixed on the first frame 31. Two floating cylinders 62 are symmetrically arranged on the fixed beam 61. The output ends of the two floating cylinders 62 are commonly connected to a movable beam 63. The PLC control program changes the distance between the floating beam and the fixed beam 61 by controlling the movement of the two floating cylinders 62.
[0026] A plurality of auxiliary rollers are rotatably disposed on both the fixed beam 61 and the movable beam 63 , and the auxiliary rollers on the fixed beam 61 and the movable beam 63 are arranged in an up-and-down staggered manner.
[0027] The first guide roller 311 , the second guide roller 312 and a plurality of auxiliary rollers are commonly provided with a first belt 313 .
[0028] By shortening the distance between the fixed beam 61 and the movable beam 63 and moving the first guide roller 311 toward the direction of the dispensing die head, the horizontal projection length of the first belt 313 can be changed, thereby increasing the movement time of the adhesive film on the first belt 313.
[0029] Reference Figure 5 The calendering assembly 2 includes a second frame 21. A plurality of lifting parts are also provided at the bottom of the second frame 21, and the second frame 21 is located above the first base 7. The second frame 21 is fixedly arranged on the side of the first frame 31 away from the rubber discharging die head. The position height of the second frame 21 is lower than the position height of the first frame 31. The top of the second frame 21 is provided with a first cooling roller 22, a second cooling roller 23 and a third cooling roller 24 in sequence along the movement direction of the rubber film. The first cooling roller 22, the second cooling roller 23 and the third cooling roller 24 are rotatably connected to the bearing seat through bearings, and the bearing seats on the second cooling roller 23 and the third cooling roller 24 are fixed to the top of the second frame 21, and the bearing seat on the first cooling roller 22 is slidably connected to the second frame 21.
[0030] A motor is disposed at one side of the second frame 21 , and an output end of the motor is connected to one end of the second cooling roller 23 .
[0031] A roller gap adjustment component 4 is disposed on the second frame 21 , and the roller gap adjustment component 4 drives the first cooling roller 22 to move, thereby changing the distance between the first cooling roller 22 and the second cooling roller 23 .
[0032] The roller gap adjustment assembly 4 includes an electric cylinder 41, which is arranged on the second frame 21 through a connecting seat. A linear guide is arranged on the top of the second frame 21, and a sliding block in the linear guide is fixed to the bearing seat on the first cooling roller 22, and the output end of the electric cylinder 41 is connected to the sliding block. A distance sensor 42 is arranged on one side of the bearing seat of the second cooling roller 23 close to the first cooling roller 22. The electric cylinder not only eliminates the pipeline and solenoid valve of the cylinder, fundamentally solving the problems of air leakage and maintenance, but also changes the vibration problem that has always existed in the cylinder through the speed control system.
[0033] The calendering of the rubber film is achieved by changing the distance between the first cooling roller 22 and the second cooling roller 23 .
[0034] The surface pattern of the second cooling roller 23 can be plain, striped, etc., and different patterns can be changed according to production needs. The first cooling roller 22 adopts the form of a surface coated with thermal conductive silica gel or a thin-skinned steel roller to ensure good heat dissipation performance. While achieving cooling and shaping of the photovoltaic film, it can also effectively control the thickness of the film to ensure that the thickness of the film is uniform.
[0035] In order to achieve a good embossing effect while taking into account the release of stress within the film, the temperature settings of the first cooling roller 22, the second cooling roller 23 and the third cooling roller 24 are all different. The temperature of the first cooling roller 22 can be set 5-20° lower than the set temperature of the second cooling roller 23, and the temperature of the third cooling roller 24 is set 0°-10° higher than the second cooling roller 23. The heating medium used for internal heating of the third cooling roller 24 is water or oil, and the temperature is controlled by an externally connected mold temperature controller. The first cooling roller 22 is set at a lower temperature, which has a cooling effect on the first conveyor belt, thereby controlling the temperature rise of the first conveyor belt within a controllable range.
[0036] Reference Figure 6 As shown, a second base 8 is also slidably arranged on the track pair, a third frame 81 is fixedly arranged on the top of the second base 8, and the third frame 81 is fixed to the first base 7 via a connecting rod.
[0037] The third frame 81 is provided with a cooling assembly 10. The cooling assembly 10 includes a fourth cooling roller 101, a fifth cooling roller 102 and a sixth cooling roller 103. The fourth cooling roller 101, the fifth cooling roller 102 and the sixth cooling roller 103 are all rotatably arranged on a bearing seat through a bearing, and a plurality of bearing seats are fixedly arranged on the third frame 81.
[0038] Three motors are arranged on the third frame 81 , and output ends of the three motors are connected to one end of the fourth cooling roller 101 , the fifth cooling roller 102 , and the sixth cooling roller 103 , respectively.
[0039] A second conveyor belt is also arranged on the second base 8 .
[0040] Reference Figure 6 As shown, a travel assembly 9 is provided on the second base 8. The travel assembly 9 includes a drive motor 91, which is fixedly provided on the second base 8, and two spur racks 92 are symmetrically provided on the foundation. A transmission shaft 93 is provided at both output ends of the drive motor 91, and the transmission shaft 93 is rotatably connected with a bearing seat through a bearing, and the bearing seats on the transmission shaft 93 are fixed to the second base 8, and a travel gear 94 is fixedly sleeved on each of the transmission shafts 93, and the travel gear 94 is meshed with the corresponding spur rack 92.
[0041] Reference Figure 7 , Figure 8 As shown, due to the wide width of the film, the temperature of each part of the roller surface is required to be balanced, and the temperature difference of the left, middle and right parts of the roller surface is required to be less than 2°, so as to avoid the shrinkage of the two sides of the film due to the large temperature difference between the left and right roller surfaces, causing wrinkles, unevenness and other defects. The first cooling roller 22, the second cooling roller 23, the third cooling roller 24, the fourth cooling roller 101, the fifth cooling roller 102 and the sixth cooling roller 103 are all arranged in the circumferential direction of the eight spiral water inlet channels and eight spiral water return channels. The eight water inlet channels and the eight water return channels on the same roller body are arranged at intervals. The double-inlet and double-outlet form of single-side water inlet and opposite-side water return is adopted, so that the temperature gradient difference brought about in the length direction of the roller surface can offset each other, and the consistency of the roller surface temperature can be ensured.
[0042] The implementation principle of the above embodiment is: When the film is extruded from the die head and pulled by the first conveyor belt to the cooling roller for calendering, the temperature of the film will slowly decrease as the length of the first conveyor belt continues to increase due to the natural cooling effect on the conveyor belt. Due to the temperature requirements for embossing the film, too high a temperature can easily affect the quality of the film, and too low a temperature is not easy to emboss. It has been verified by experiments that the most suitable molding temperature is when the temperature of the film is slightly higher than the melting point of the material when it reaches the calendering between the first cooling roller 22 and the second cooling roller 23.
[0043] However, as the production line speed increases, the temperature of the film will become higher and higher when it is transported to the calendering process. In this case, the actual conveying length of the first conveyor belt needs to be adjusted.
[0044] Under the action of the PLC control program, the two floating cylinders 62 change the distance between the fixed beam 61 and the floating beam. When the distance between the fixed beam 61 and the floating beam is shortened, the screw module 51 drives the first guide roller 311 to move toward the die head, which actually increases the horizontal projection length of the first conveyor belt.
[0045] When the production process is speeding up and slowing down, it is necessary to start the travel assembly 9 at the same time, and drive the travel gear 94 connected to the transmission shaft 93 to rotate through the drive motor 91 installed on the frame of the molding device, and drive the third frame 81 indirectly connected to the travel gear 94 to make a linear motion under the meshing of the gear pair, thereby driving the movement of the entire third frame 81, the third frame 81 drives the second base 8 to move, the second base 8 drives the first base 7 to move, and the first base 7 drives forward or backward along the film outlet direction of the production line. In this way, the molding device and the die head are kept at a certain distance to suit the current production line speed, and the lifting part is started at the same time, and the rise and fall of the molding device are adjusted under the action of the lifting part, so as to adjust the height from the conveyor belt surface to the mold within a suitable range.
[0046] After the film is melted and plasticized by the extruder, it is extruded from the forming flat die head, spread flat on the first conveyor belt and moved forward with the traction of the first conveyor belt. During this process, the photovoltaic film is not subject to external force and slowly cools down in the air in a natural state. When it moves with the conveyor belt to the gap between the first cooling roller 22 and the second cooling roller 23, the film is initially cooled under the action of the cooling water flow inside the first cooling roller 22 and the second cooling roller 23. At the same time, due to the pushing action of the electric cylinder 41, the first cooling roller 22 and the second cooling roller 23 are attached together and form a certain pressure. Under the pressure between the two rollers, the surface of the film forms a pattern opposite to the surface of the second cooling roller 23, and continues to move forward with the conveyor belt after passing through the two rollers. When reaching the surface of the third cooling roller 24, the film is further cooled. At this time, the temperature of the film is only slightly higher than the roller temperature. The temperature of the film is close to that of the third cooling roller 24, and it is easy to peel off from the third cooling roller 24. After leaving the first conveyor belt, the film enters the cooling assembly 10, and passes through the fourth cooling roller 101 to the sixth cooling roller 103 in sequence. The fourth to sixth cooling rollers 103 are all active rollers, which rotate under the drive of the motor. During the traction process of each cooling roller, the film fits with the roller surface of each cooling roller to further release the residual temperature and stress inside. After the heat exchange cooling process with each cooling roller, the film is cooled and shaped. Then the film is spread on the surface of the second conveyor belt. The film continues to move forward under the traction of the second conveyor belt, and further releases the stress on the surface of the second conveyor belt to form a photovoltaic film with stable final size.
[0047] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. An improved photovoltaic film forming device, comprising a device body (1), wherein the device body (1) comprises a calendering component (2), characterized in that: A first transport component (3) is provided between the calendering component (2) and the die head, and as the film just out of the die head moves toward the calendering component (2) along with the first transport component (3), the film cools naturally and its internal stress is quickly released.
2. The improved photovoltaic film forming device according to claim 1, characterized in that: The first transport component (3) comprises a first frame (31), the first frame (31) being arranged on a foundation, a first guide roller (311) and a second guide roller (312) being arranged on the upper half of the first frame (31), a plurality of auxiliary rollers being arranged between the first guide roller (311) and the second guide roller (312), and a first belt (313) being arranged on the first guide roller (311), the second guide roller (312) and the plurality of auxiliary rollers.
3. The improved photovoltaic film forming device according to claim 2, characterized in that: The calendering assembly (2) comprises a second frame (21), the second frame (21) being fixedly arranged on a side of the first frame (31) away from the rubber discharging die head, and a first cooling roller (22), a second cooling roller (23) and a third cooling roller (24) being arranged in sequence on the top of the second frame (21) along the movement direction of the rubber film; The first cooling roller (22), the second cooling roller (23) and the third cooling roller (24) are rotatably connected to the bearing seat via bearings; the bearing seats on the second cooling roller (23) and the third cooling roller (24) are fixed to the top of the second frame (21); and the bearing seat on the first cooling roller (22) is slidably connected to the second frame (21); A motor is disposed on one side of the second frame (21), and an output end of the motor is connected to one end of the second cooling roller (22); A roller gap adjustment component (4) is provided on the second frame (21), and the roller gap adjustment component (4) drives the first cooling roller (22) to move, thereby changing the distance between the first cooling roller (22) and the second cooling roller (23).
4. The improved photovoltaic film forming device according to claim 2, characterized in that: A horizontal belt adjustment component (5) is provided on the first frame (31), and the horizontal belt adjustment component (5) drives the first guide roller (311) to move; The first frame (31) is also provided with a belt storage assembly (6); The horizontal belt adjustment component (5) and the belt storage component (6) jointly change the horizontal plane projection length of the first belt (313).
5. The improved photovoltaic film forming device according to claim 4, characterized in that: The horizontal belt adjustment assembly (5) comprises two screw modules (51), the two screw modules (51) are fixedly arranged on the first frame (31), the first guide roller (311) is rotatably connected to the bearing shaft via a bearing, and the bearing seat on the first guide roller (311) is fixedly connected to a corresponding moving block in the screw module (51); The belt storage assembly (6) comprises a fixed beam (61), the fixed beam (61) being fixed on the first frame (31), two floating cylinders (62) being symmetrically arranged on the fixed beam (61), and the output ends of the two floating cylinders (62) being commonly connected to a movable beam (63); A plurality of auxiliary rollers are rotatably arranged on both the fixed beam (61) and the movable beam (63); the plurality of auxiliary rollers on the fixed beam (61) and the movable beam (63) are arranged in an up-and-down staggered manner.
6. The improved photovoltaic film forming device according to claim 3, characterized in that: The bottom of the first frame (31) is flush with the bottom of the second frame (21); A track pair is arranged on the foundation, a first base (7) is arranged on the track pair, the first base (7) is slidably connected to the track pair, the first base (7) and the second frame (21) and a lifting part are arranged on the second frame (21); A second base (8) is also slidably arranged on the track pair, a third frame (81) is fixedly arranged on the top of the second base (8), and the third frame (81) is fixed to the first base (7) via a connecting rod; A walking assembly (9) is arranged on the second base (8); The travel assembly (9) comprises a drive motor (91), the drive motor (91) being fixedly mounted on the second base (8), two spur racks (92) being symmetrically mounted on the foundation, a transmission shaft (93) being disposed at both output ends of the drive motor (91), the transmission shaft (93) being rotatably connected to a bearing seat via a bearing, the bearing seats on the transmission shaft (93) being fixed to the second base (8), and a travel gear (94) being fixedly sleeved on each of the transmission shafts (93), the travel gear (94) being meshed with the corresponding spur rack (92).
7. The improved photovoltaic film forming device according to claim 3, characterized in that: The roller gap adjustment assembly (4) comprises an electric cylinder (41), and the electric cylinder (41) is arranged on the second frame (21) via a connecting seat; A linear guide is provided on the top of the second frame (21), a sliding block in the linear guide is fixed to a bearing seat on the first cooling roller (22), and an output end of the electric cylinder (41) is connected to the sliding block; A distance sensor (42) is provided on one side of one of the bearing seats on the second cooling roller (23) close to the first cooling roller (22).
8. The improved photovoltaic film forming device according to claim 6, characterized in that: The third frame (81) is provided with a cooling assembly (10); The cooling assembly (10) comprises a fourth cooling roller (101), a fifth cooling roller (102) and a sixth cooling roller (103); The fourth cooling roller (101), the fifth cooling roller (102) and the sixth cooling roller (103) are all rotatably arranged on a bearing seat via a bearing, and a plurality of bearing seats are fixedly arranged on the third frame (81); The third frame (81) is provided with three motors, and the output ends of the three motors are respectively connected to one end of the fourth cooling roller (101), the fifth cooling roller (102) and the sixth cooling roller (103).
9. The improved photovoltaic film forming device according to claim 8, characterized in that: The first cooling roller (22), the second cooling roller (23), the third cooling roller (24), the fourth cooling roller (101), the fifth cooling roller (102) and the sixth cooling roller (103) all have eight spiral water inlet channels and eight spiral water return channels evenly arranged in the circumferential direction thereof, and the eight water inlet channels and the eight water return channels on the same roller body are arranged at intervals.