Small movable POE cast film test line

Abstract

The utility model discloses a small movable POE (Polyolefin Elastomer) cast film test line which comprises a first device, a second device and a mold, the extruder of the first device can heat and melt raw materials to extrude melt, the melt is formed into a film with the adjustable thickness through the mold, and the second device drags, cools and rolls the film. The first device and the second device are respectively installed on a movable rack, the second rack is further provided with a forming roller, a tension control assembly, a traction assembly, a winding assembly and a transition roller, a lifting assembly is arranged below the second rack, and the forming roller assembly comprises a rotary joint and a water segregator for cooling. The test line is high in integration level and flexible in process, solves the problem that traditional equipment cannot meet the requirements of research and development of scientific research institutes or mass production of large factories in a transition stage, and can be widely applied to related tests and small-batch production of POE cast films.

Description

TECHNICAL FIELD

[0001] The utility model relates to general mechanical equipment manufacturing technical field, concretely relates to a small -size movable POE flow -casting film test line. BACKGROUND

[0002] POE flow -casting film, it is relying on POE material, with the help of specific process is made continuous sheet film, rely on its unique advantage, in new energy photovoltaic packaging, high -end food preservation packaging, precision electronic device protection and so on field play key role, traditional POE flow -casting film production equipment is based on large -scale, fixed design concept, aims at guaranteeing high productivity and processing stability. Each rack structure is heavy, bulky and fixed in specific site position, is difficult to move, in the research and development of scientific research institute laboratory or large factory industrialization mass production transition stage, traditional large -scale equipment can not satisfy the requirement. UTILITY MODEL CONTENT

[0003] The utility model aims at overcoming above insufficient, the utility model's purpose is to provide a small -size movable POE flow -casting film test line, has small -size, movable characteristics, and the POE flow -casting film test line of high integration, process flexible.

[0004] The utility model provides a small movable POE flow -casting membrane test line includes first device, second device, mould, the first device is used for extruding after raw materials heat, melt, the mould is connected with first device, is used to make the melt of first device delivery into the film, and can adjust the thickness of film, second device is used for the film of mould extrusion draws, cools and winds, first device includes extruder, movable first rack, the extruder is installed on first rack, second device includes movable second rack, be installed with forming roller assembly, tension control component, traction component, winding assembly, a group of transition roller in second rack, forming roller assembly is used for receiving the film from mould, and carries out the preliminary setting, cooling to film, tension control component is used for carrying out tension control to the film of forming roller assembly transmission, traction component provides the traction for film, makes it move according to the set speed and direction, winding assembly is used for winding the film that draws to form film roll, a group of transition roller is used for the transition and the guidance film between forming roller assembly, tension control component, traction component and winding assembly. First device is equipped with extruder, can efficiently heat, melt treatment after extruding raw materials, realizes from solid raw material to the melt state change of subsequent forming processing, lays the foundation material condition for film forming, by means of specially designed mould, can accurately receive the melt of extruder delivery, and according to production demand, flexible adjustment film thickness, ensure that the output different specifications of flow -casting membrane product, satisfy the diversified test and small -batch production demand, the forming roller assembly in second device plays the key role, on the one hand, receives the film that just extrudes from mould, prevents its deformation, carries out preliminary setting, on the other hand, utilizes the cooling characteristic that itself possesses, promotes the rapid cooling of film, solidification forming, improves the physical performance and appearance flatness of film, tension control component controls tension to the film of forming roller transmission in real time, avoids the bad phenomenon such as film wrinkle, overstretching or relaxation due to improper tension, guarantees the stability and quality consistency of film in subsequent processing flow, traction component provides stable, settable traction for film, overcomes the resistance such as friction of film moving process, guarantees that film moves continuously, stably according to the intended speed and accurate direction, is favorable to the collaborative work of each link, winding assembly orderly winds the film that draws and completes processing flow as film roll, facilitates storage, handling and subsequent quality detection, performance evaluation etc. operation of finished film, a group of transition roller is arranged between each key processing component (forming roller assembly, tension control component, traction component, winding assembly), cleverly realizes the smooth transition, accurate guidance of film, reduces the friction, scratch risk between film and equipment framework, maintains the smoothness of film operation.

[0005] Further, the small movable POE cast film test line in the application, the extruder includes a screw, a cylinder, a heating ring, a hopper, a motor connecting body, a first speed reducer, the screw is sleeved in the cylinder, one end of the cylinder is connected with the mold, the end away from the mold is connected with the first speed reducer through the motor connecting body, the hopper is arranged on the cylinder and is close to the motor connecting body, the heating ring is sleeved outside the cylinder and along the section from the hopper to the mold. The screw, the cylinder, the heating ring, the hopper, the motor connecting body and the first speed reducer are compactly combined, and each component is closely matched and complementary. The hopper is convenient for feeding, the motor and the speed reducer provide stable power output to drive the screw, the heating ring provides heat as needed, the cylinder contains and restricts the material and heat transfer, reduces the energy loss and material transmission obstruction caused by structural dispersion, improves the overall extrusion efficiency and stability, and meets the functional integration requirement of the small test line with limited space.

[0006] Further, the small movable POE cast film test line in the application, the cylinder is further provided with an inlet and outlet water joint, and the inlet and outlet water joint is arranged between the hopper and the heating ring. The inlet and outlet water joint is arranged on the cylinder between the hopper and the heating ring, and its main function is to further regulate the local temperature of the cylinder. By circulating cooling water or hot water into the cylinder, the temperature can be fine-tuned above or below the basic heating temperature provided by the heating ring, so as to more accurately control the temperature environment of the material in the cylinder and meet the more detailed requirements of the specific process for the material temperature.

[0007] Further, the small movable POE cast film test line in the application, the forming roller assembly includes a pair of first rollers, a pair of second reducers, a pair of the first rollers are installed in the second rack in an upper and lower interval, the second reducer is installed outside the second rack, the second reducer corresponds to the first roller one by one, and drives the first roller to rotate with the film, and the thickness of the film is adjusted by adjusting the rotating speed of the second reducer. A pair of first rollers installed in the second rack in an upper and lower interval can effectively receive the film sent after the transition from the mold. In this process, the first roller contacts the film with its roller surface to provide preliminary support and constraint for the film, so that the film can maintain a relatively stable shape after leaving the mold, realize preliminary shaping, prevent the film from being deformed or wrinkled, and the first roller absorbs the heat of the film in the process of contacting and driving the film to rotate, thereby cooling the film. The cooling effect helps to further solidify the shape of the film and improve the physical properties and appearance quality of the film. The second reducer corresponding to the first roller is installed outside the second rack, and drives the first roller to rotate with the film. Moreover, the rotating speed of the first roller can be changed by precisely adjusting the rotating speed of the second reducer. Since the running speed of the film on the first roller is related to the rotating speed of the first roller, and the thickness of the film is affected by the running speed and other factors, the thickness of the film can be indirectly adjusted to meet the production test requirements of cast films of different thicknesses.

[0008] Further, the small movable POE cast film test line in the application, the tension control assembly includes a tension roller, a pair of tension roller seats, a pair of the tension roller seats are installed on the second rack, the tension roller is arranged between the pair of tension roller seats and connected with the rolling bearing of the tension roller seat, and a tension sensor is arranged on the tension roller seat. The tension roller can rotate flexibly between the pair of tension roller seats through the rolling bearing connection with the tension roller seat. When the film is transmitted from the forming roller assembly and passes around the tension roller, the tension roller will exert a certain tension on the film due to its rotating characteristics and contact relationship with the film, and the tension sensor arranged on the tension roller seat can sense the tension change of the tension roller in the process of contacting and exerting tension on the film in real time.

[0009] Furthermore, this application discloses a small, movable POE cast film test line. The traction assembly includes a driving steel roller, a driven adhesive roller, a pair of adjustable cylinders, and a third reducer. The driving steel roller and the driven adhesive roller are mounted on a second frame, with the driving steel roller positioned below the driven adhesive roller. The pair of adjustable cylinders, mounted on the second frame, are used to adjust the vertical height of the driven adhesive roller. The third reducer, also mounted on the second frame, drives the driving steel roller to rotate. During rotation, the driving steel roller, relying on the friction between itself and the driven adhesive roller, applies a traction force to the film sandwiched between them. The pair of adjustable cylinders, mounted on the second frame, adjust the vertical height of the driven adhesive roller. By adjusting parameters such as air pressure or stroke of the adjustable cylinders, the position of the driven adhesive roller relative to the driving steel roller can be changed, thereby adjusting the gap between them and the pressure applied to the film. Appropriate pressure ensures that the driving steel roller and the driven rubber roller clamp the film tightly, making the friction between them large enough to effectively transmit the traction force, prevent the film from slipping during the traction process, and ensure the stability of film traction.

[0010] Furthermore, this application discloses a small, mobile POE cast film test line, wherein the winding assembly includes a fourth reducer and an air-expanding winding shaft. Both the fourth reducer and the air-expanding winding shaft are mounted on a second frame. The fourth reducer drives the air-expanding winding shaft to rotate and wind the film. The fourth reducer, mounted on the second frame, primarily provides power to the air-expanding winding shaft. By driving the air-expanding winding shaft to rotate, the film, pulled by the traction assembly, can be wound orderly onto the air-expanding winding shaft, achieving the purpose of winding the film into a film roll, completing the final process of the cast film production test line.

[0011] Furthermore, in a small, mobile POE cast film test line of this application, a set of lifting components is provided below the second frame, the lifting components being used to adjust the height of the second frame.

[0012] Furthermore, in a small, mobile POE cast film test line of this application, the forming roller assembly further includes a rotary joint and a water distributor. The rotary joint is installed at the axial end of the first roller, and the water distributor is installed on the lower side of the second frame. The rotary joint and the water distributor are connected via a pipe. The rotary joint, installed at the axial end of the first roller, primarily functions as a rotatable connecting component, maintaining communication with the external pipeline during the rotation of the first roller. The connection to the water distributor via a pipe enables the transfer of a medium (such as water or other cooling media) between the two. In other words, it allows the cooling medium from the water distributor to smoothly enter the cooling circulation system associated with the first roller.

[0013] Further, the small movable POE flow casting film test line in the application, the outer cover of the extruder is provided with a protective cover, and the electric control box is arranged in the first rack. The protective cover arranged on the outer cover of the extruder mainly plays a physical protection role, and the electric control box arranged in the first rack is the electrical control center of the whole small movable POE flow casting film test line.

[0014] The above technical scheme can be seen that the utility model has the following beneficial effects:

[0015] 1. The small movable POE flow casting film test line has the advantages that the first rack and the second rack are movable, flexible arrangement in different site positions is facilitated, diversified use scenes such as a research institute laboratory research and development or a large factory industrial production transition stage are adapted, and the problem that a traditional large fixed equipment is difficult to move is effectively solved. Meanwhile, the equipment has high integration, functions such as raw material heating extrusion, film forming, traction, cooling and winding are integrated, components work cooperatively, production test efficiency is improved, and compact layout of multiple functions is realized in limited space, so that equipment floor area is reduced.

[0016] 2. The small movable POE flow casting film test line has the advantages that flexible regulation and control of a process are realized through fine design of components. The mold can adjust film thickness, the second speed reducer in the forming roller assembly can indirectly control film thickness by adjusting the rotating speed of the first roller, the tension control assembly can control film tension in real time, and the water inlet and outlet joint can fine tune the barrel temperature, and the like. These designs are beneficial to in-depth exploration of the influence of different process parameters on the performance of POE flow casting film products by scientific researchers and technical personnel, facilitate optimization of a production process, and are favorable for production of high-quality flow casting film products of different specifications and performance requirements, meet diversified market demands, and the equipment is stable and reliable in operation, and can provide strong support for flow casting film production test. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole schematic view of the small movable POE flow casting film test line.

[0018] Figure 2 It is a first device schematic view of the small movable POE flow casting film test line.

[0019] Figure 3 It is a first forming roller assembly schematic view of the small movable POE flow casting film test line.

[0020] Figure 4 It is a second forming roller assembly schematic view of the small movable POE flow casting film test line.

[0021] Figure 5The utility model discloses a first schematic view of a small movable POE flow film test line tension control assembly,

[0022] Figure 6 The utility model discloses a second schematic view of a small movable POE flow film test line tension control assembly,

[0023] Figure 7 The utility model discloses a schematic view of a small movable POE flow film test line traction assembly,

[0024] Figure 8 The utility model discloses a first schematic view of a small movable POE flow film test line winding assembly,

[0025] Figure 9 The utility model discloses a second schematic view of a small movable POE flow film test line winding assembly.

[0026] The utility model discloses a first schematic view of a small movable POE flow film test line winding assembly, Specific embodiments

[0027] The utility model discloses a first schematic view of a small movable POE flow film test line winding assembly,

[0028] As Figure 1The illustrated small movable POE cast film test line includes a first device 1, a second device 2, and a mold 3. The first device 1 is used to heat and melt the raw material and then extrude it. The mold 3 is connected to the first device 1 and is used to shape the melt sent by the first device 1 into a film, and the thickness of the film can be adjusted. The second device 2 is used to pull, cool, and wind the film extruded by the mold 3. The first device 1 includes an extruder 11 and a movable first frame 12. The extruder 11 is installed on the first frame 12. The second device 2 includes a movable second frame 21. The second frame 21 is installed with a forming roller assembly 22, a tension control assembly 23, a pulling assembly 24, a winding assembly 25, and four transition rollers 26. The forming roller assembly 22 is used to receive the film from the mold 3 and perform preliminary shaping and cooling on the film. The tension control assembly 23 is used to control the tension of the film transmitted by the forming roller assembly 22. The pulling assembly 24 provides pulling force to the film to move it at a set speed and direction. The winding assembly 25 is used to wind the pulled film into a film roll. The four transition rollers 26 are used to transition and guide the film between the forming roller assembly 22, the tension control assembly 23, the pulling assembly 24, and the winding assembly 25. The first device 1 is equipped with an extruder 11, which can efficiently heat and melt the raw material and then extrude it, realizing the transition from solid raw material to melt state for subsequent shaping and processing, laying the foundation for the material conditions of film shaping. With the help of a specially designed mold 3, the melt sent by the extruder 11 can be accurately received, and the thickness of the film can be flexibly adjusted according to production needs, ensuring the output of different specifications of cast film products to meet the needs of diversified testing and small-batch production. The forming roller assembly 22 in the second device 2 plays a key role. On the one hand, it receives the film just extruded from the mold 3 to prevent deformation and perform preliminary shaping. On the other hand, it uses its own cooling characteristics to quickly cool the film, solidify it, and improve the physical properties and appearance flatness of the film. The tension control assembly 23 controls the tension of the film transmitted by the forming roller assembly 22 in real time to avoid wrinkles, excessive stretching, or relaxation of the film due to improper tension, ensuring the stability and quality consistency of the film in the subsequent processing process. The pulling assembly 24 provides stable and settable pulling force to the film to overcome the resistance such as friction during the movement of the film, ensuring the continuous and smooth movement of the film at a set speed and accurate direction, which is beneficial for the coordinated operation of each link. The winding assembly 25 orderly winds the pulled and processed film into a film roll, facilitating storage, handling, and subsequent quality detection and performance evaluation of the finished film. A set of transition rollers 26 is arranged between the key processing components (forming roller assembly 22, tension control assembly 23, pulling assembly 24, and winding assembly 25), which cleverly realizes the smooth transition and accurate guidance of the film, reduces the friction and scratching risk between the film and the equipment architecture, and maintains the smooth operation of the film.Both the first frame 12 and the second frame 21 are equipped with casters, which combine the functions of casters and fixed feet.

[0029] In this embodiment, as Figure 2 As shown, the extruder 11 includes a screw 111, a barrel 112, a heating coil 113, a hopper 114, a motor connector 115, and a first reducer 116. The screw 111 is fitted inside the barrel 112. One end of the barrel 112 is connected to the mold 3, and the end away from the mold 3 is connected to the first reducer 116 via the motor connector 115. The hopper 114 is located on the barrel 112 and close to the motor connector 115. The heating coil 113 is fitted outside the barrel 112, extending along the section from the hopper 114 to the mold 3. The screw 111, barrel 112, heating coil 113, hopper 114, motor connector 115, and first reducer 116 are compactly combined, with each component working closely together and complementing each other. The hopper 114 provides convenient material feeding, while the motor and reducer provide stable power output to drive the screw 111. The heating coil 113 provides heat as needed, and the barrel 112 accommodates and constrains the material and transfers heat, reducing energy loss and material transport obstacles caused by structural dispersion, thereby improving overall extrusion efficiency and stability. This meets the needs of small pilot lines with limited space but integrated functions.

[0030] In this embodiment, the barrel 112 is further provided with a water inlet / outlet connector 1121, which is located between the hopper 114 and the heating coil 113. The water inlet / outlet connector 1121, located on the barrel 112 between the hopper 114 and the heating coil 113, primarily functions to further regulate the local temperature of the barrel 112. By introducing cooling water or hot water into the barrel 112, fine adjustments can be made above or below the base heating temperature provided by the heating coil 113, allowing for more precise control of the material temperature environment within the barrel 112 and meeting the more detailed temperature requirements of specific processes.

[0031] In this embodiment, as Figure 3 , 4The forming roller assembly 22 includes a pair of first rollers 211, a pair of second reducers 212, the first rollers 211 are installed in the second rack 21 in an upper and lower interval, the second reducers 212 are installed outside the second rack 21, the second reducers 212 correspond to the first rollers 211 one by one and drive the first rollers 211 to rotate with the film, and the thickness of the film is adjusted by adjusting the rotating speed of the second reducers 212. The first rollers 211 installed in the second rack 21 in an upper and lower interval can effectively receive the film extruded from the mold 3 and sent after the transition. In this process, the first rollers 211 contact the film with their roller surfaces to provide preliminary support and constraint for the film, so that the film can maintain a relatively stable shape after leaving the mold 3, realize preliminary shaping, prevent the film from being deformed or wrinkled, and the first rollers 211 absorb the heat of the film during the process of contacting the film and driving it to rotate, thereby cooling the film. The cooling effect helps to further solidify the shape of the film and improve the physical properties and appearance quality of the film. The second reducers 212 corresponding to the first rollers 211 are installed outside the second rack 21, drive the first rollers 211 to rotate with the film, and the rotating speed of the first rollers 211 can be changed by precisely adjusting the rotating speed of the second reducers 212. Since the running speed of the film on the first rollers 211 is related to the rotating speed of the first rollers 211, and the thickness of the film is affected by the running speed and other factors, the thickness of the film can be indirectly adjusted to meet the production test requirements of films with different thicknesses.

[0032] In this embodiment, as shown in Figure 5 、 6 The tension control assembly 23 includes a tension roller 231 and a pair of tension roller seats 232, the tension roller seats 232 are installed on the second rack 21, the tension roller 231 is arranged between the tension roller seats 232 and connected with the rolling bearings of the tension roller seats 232, and the tension sensor 233 is arranged on the tension roller seat 232. The tension roller 231 can rotate flexibly between the tension roller seats 232 through the rolling bearing connection with the tension roller seats 232. When the film is transmitted from the forming roller assembly 22 and passes around the tension roller 231, the tension roller 231 will exert a certain tension on the film due to its rotating characteristics and contact relationship with the film, and the tension sensor 233 arranged on the tension roller seat 232 can sense the tension change of the tension roller 231 in real time during the contact with the film and the tension exertion. The tension roller 231 is made of aluminum alloy, and the tension sensor 233 is a 30KG Mitsubishi tension sensor.

[0033] In this embodiment, as shown in Figure 7As shown, the traction assembly 24 includes a driving steel roller 241, a driven rubber roller 242, a pair of adjustable air cylinders 243, and a third speed reducer 244. The driving steel roller 241 and the driven rubber roller 242 are mounted on the second frame 21, with the driving steel roller 241 located below the driven rubber roller 242. The pair of adjustable air cylinders 243 are mounted on the second frame 21 for adjusting the vertical height of the driven rubber roller 242. The third speed reducer 244 is mounted on the second frame 21 for driving the driving steel roller 241 to rotate. During rotation, the driving steel roller 241 can exert traction force on the film clamped between the driving steel roller 241 and the driven rubber roller 242 by means of the friction therebetween. The pair of adjustable air cylinders 243 are mounted on the second frame 21 for adjusting the vertical height of the driven rubber roller 242. By adjusting the air pressure or stroke of the adjustable air cylinders 243, the position of the driven rubber roller 242 relative to the driving steel roller 241 can be changed, thereby adjusting the gap therebetween and the pressure exerted on the film. Suitable pressure can ensure that the driving steel roller 241 and the driven rubber roller 242 tightly clamp the film, so that the friction therebetween is large enough to effectively transmit traction force and prevent the film from slipping during traction, thereby ensuring the stability of film traction. The speed of the traction assembly 24 is controlled at 3 meters / minute.

[0034] In this embodiment, as shown in Figure 8 , 9 The winding assembly 25 includes a fourth speed reducer 251 and an inflatable winding shaft 252, both of which are mounted on the second frame 21. The fourth speed reducer 251 is used to drive the inflatable winding shaft 252 to rotate and wind the film. The fourth speed reducer 251 is mounted on the second frame 21 and its main function is to provide power for the inflatable winding shaft 252. By driving the inflatable winding shaft 252 to rotate, the film that has been tractioned by the traction assembly 24 can be orderly wound on the inflatable winding shaft 252, achieving the purpose of winding the film into a film roll and completing the last process of the cast film production test line.

[0035] In this embodiment, as shown in Figure 1 The second frame 21 is also symmetrically provided with four lifting assemblies 213 below, which are used to adjust the height of the second frame 21.

[0036] In this embodiment, as shown in Figure 3 , 4As shown, the forming roller assembly 22 further comprises 4 rotary joints 214, which are respectively installed at the axial ends of the first roller 211, and a water distributor 215, which is installed at the lower side of the second frame 21, and the rotary joints 214 and the water distributor 215 are connected through pipes. The rotary joints 214 are installed at the axial ends of the first roller 211, and mainly serve as a rotatable connecting part, which can keep the communication state with the external pipes during the rotation of the first roller 211. Through the pipe connection with the water distributor 215, the transmission of the medium (such as water and other cooling medium) between the two is realized. That is, it allows the cooling medium sent from the water distributor 215 to smoothly enter the cooling circulation system related to the first roller 211.

[0037] In this embodiment, as shown in the figure, Figure 2 The outer cover of the extruder 11 is provided with a protective cover 117, and the first frame 12 is provided with an electric control box 121. The protective cover 117 provided on the outer cover of the extruder 11 mainly plays a physical protection role, and the electric control box 121 provided in the first frame 12 is the electrical control center of the whole small movable POE flow casting film test line.

[0038] The above embodiments are exemplary, and the purpose is to illustrate the technical concept and characteristics of the present application, so that those skilled in the art can understand the content of the present application and implement it accordingly, and the protection scope of the present application cannot be limited thereby. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A small scale mobile POE cast film pilot line characterized by: The application relates to a film production device, which comprises a first device (1), a second device (2) and a mold (3), the first device (1) is used for heating and melting raw materials and then extruding, the mold (3) is connected with the first device (1) and is used for forming the melt delivered by the first device (1) into a film and adjusting the thickness of the film, and the second device (2) is used for pulling, cooling and winding the film extruded by the mold (3).

2. A small mobile POE cast film pilot line according to claim 1, characterized in that: The extruder (11) comprises a screw rod (111), a cylinder (112), a heating ring (113), a hopper (114), a motor connecting body (115) and a first speed reducer (116), the screw rod (111) is sleeved in the cylinder (112), one end of the cylinder (112) is connected with the mold (3), the end, which is away from the mold (3), is connected with the first speed reducer (116) through the motor connecting body (115), the hopper (114) is arranged on the cylinder (112) and is close to the motor connecting body (115), and the heating ring (113) is sleeved outside the cylinder (112) and along a section from the hopper (114) to the mold (3).

3. A small mobile POE cast film pilot line according to claim 2, characterized in that: The cylinder (112) is further provided with an inlet and outlet water joint (1121), and the inlet and outlet water joint (1121) is arranged between the hopper (114) and the heating ring (113).

4. A small mobile POE cast film pilot line according to claim 1, characterized in that: The forming roller assembly (22) comprises a pair of first rollers (211) and a pair of second speed reducers (212), the pair of first rollers (211) are installed in the second rack (21) in an upper and lower interval mode, the second speed reducers (212) are installed outside the second rack (21), the second speed reducers (212) correspond to the first rollers (211) one by one and drive the first rollers (211) to rotate together with the film, and the thickness of the film is adjusted by adjusting the rotating speed of the second speed reducers (212).

5. A small mobile POE cast film pilot line according to claim 1, characterized in that: The tension control assembly (23) comprises a tension roller (231), a pair of tension roller seats (232), the pair of tension roller seats (232) are installed on the second rack (21), the tension roller (231) is arranged between the pair of tension roller seats (232) and is connected with the rolling bearing of the tension roller seat (232), and the tension roller seat (232) is provided with a tension sensor (233).

6. A small mobile POE cast film pilot line according to claim 1, characterized in that: The traction assembly (24) comprises a driving steel roller (241), a driven rubber roller (242), a pair of adjustable air cylinders (243) and a third speed reducer (244), the driving steel roller (241) and the driven rubber roller (242) are installed on the second rack (21), The driving steel roller (241) is arranged below the driven rubber roller (242), the pair of adjustable air cylinders (243) are installed on the second rack (21) and are used for adjusting the vertical height of the driven rubber roller (242), and the third speed reducer (244) is installed on the second rack (21) and is used for driving the driving steel roller (241) to rotate.

7. A small mobile POE cast film pilot line according to claim 1, characterized in that: The winding assembly (25) comprises a fourth speed reducer (251) and an air expansion winding shaft (252), the fourth speed reducer (251) and the air expansion winding shaft (252) are installed on the second rack (21), and the fourth speed reducer (251) is used for driving the air expansion winding shaft (252) to rotate and wind the film.

8. A small mobile POE cast film pilot line according to claim 1, characterized in that: A group of lifting assemblies (213) are further arranged below the second rack (21), and the lifting assemblies (213) are used for adjusting the height of the second rack (21).

9. A small mobile POE cast film pilot line according to claim 4, characterized in that: The forming roller assembly (22) further comprises a rotary joint (214) and a water distributor (215), the rotary joint (214) is installed on the axial end of the first roller (211), the water distributor (215) is installed on the lower side of the second rack (21), and the rotary joint (214) is connected with the water distributor (215) through a pipeline.

10. A small mobile POE cast film pilot line according to claim 1, characterized in that: The outer cover of the extruder (11) is provided with a protective cover (117), and the first rack (12) is provided with an electric control box (121).

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