A five-layer co-extrusion film production unit

Abstract

The present invention discloses a five-layer co-extruded film production unit, including a hollow base, five extruders are arranged on the base, a feed hopper is arranged on the extruder, a water tank is fixedly connected to the base, a die head is fixedly connected to the side wall of the water tank through a rod, the extruder is connected to the die head, a first side block and a second side block are fixedly connected to the base, both the first side block and the second side block are hollow structures, a servo motor is fixedly connected to the side wall of the base through a bracket, the output shaft of the servo motor is fixedly connected to a rotating shaft, and the rotating shaft and the base are connected to rotate through a bearing. The advantage is that the production unit of the present invention has a better cooling effect, and the heat of the film can be reused, so that the unit is more energy-saving, and at the same time, a good corona treatment effect can be guaranteed, and the cost of the production unit is low, while also ensuring a certain degree of automation, which is more suitable for use in small factories.

Description

Technical Field

[0001] The invention relates to the technical field of film production, and in particular to a five-layer co-extrusion film production unit. Background Art

[0002] Film is one of the common packaging materials and plays a vital role in modern science and technology and industry. Films are widely used in food, medicine and other fields. With the continuous advancement of science and technology and the increasing demand for new materials, the application fields of films will continue to expand and deepen. Multilayer film is one of the films. Multilayer film is a new type of material composed of two or more layers of film materials through a specific process. These film layers can be the same material but with different properties, or different types of materials. Therefore, multilayer film has a variety of different functions to meet the performance required by the film. The production of multilayer film is generally carried out by multiple extruders to extrude the material. Multiple materials pass through the die head to produce a multilayer composite film.

[0003] In the prior art, the existing multi-layer film production unit needs to be cooled after the film is produced, and the cooling method is to extend the production line and cool the film by natural cooling. The cooling efficiency of this method is low, and the existing production unit generally needs to use multiple motors and cooperate with the control system to transport the produced film. The equipment cost is high, and the control system is complex. It is also difficult for subsequent maintenance and is not suitable for use in small factories. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a five-layer co-extrusion film production unit.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A five-layer co-extruded film production unit comprises a hollow base, five extruders are arranged on the base, a feed hopper is arranged on the extruder, a water tank is fixedly connected to the base, a die head is fixedly connected to the side wall of the water tank through a rod, the extruder is connected to the die head, a first side block and a second side block are fixedly connected to the base, both the first side block and the second side block are hollow structures, a servo motor is fixedly connected to the side wall of the base through a bracket, a rotating shaft is fixedly connected to the output shaft of the servo motor, the rotating shaft and the base are rotatably connected through a bearing, a corona treater is arranged between the first side block and the second side block, and a cooling mechanism is arranged at the first side block and the second side block.

[0007] Further, the cooling mechanism includes two first tubes and two second tubes, the first tube is rotatably connected to the first side block through a bearing, the second tube is rotatably connected to the second side block through a bearing, the corresponding first tube and second tube are commonly penetrated and fixedly connected to a cooling roller, the cooling roller is a hollow structure and a plurality of heat conducting plates are fixedly connected to its inner wall, the side wall of the second side block is fixedly connected to a side block, the side block is a hollow structure, the second tube is rotatably connected to the side block through a bearing and extends to the inside thereof, the side block and the water tank are commonly penetrated and fixedly connected to a fifth tube, the fifth tube is penetrated and fixedly connected to the feed hopper, the side wall of the fifth tube located in the feed hopper is penetrated and fixedly connected to two sliding sleeves, an adjusting column is sealingly and slidably connected in the sliding sleeve, the sliding sleeve is filled with phase change liquid, the end of the adjusting column located outside the sliding sleeve is fixedly connected to a baffle, and the baffle is slidably connected to the feed hopper.

[0008] Furthermore, the cooling mechanism also includes a hollow liquid transfer box, the liquid transfer box is fixedly connected to the inner bottom wall of the base, a pump block is sealingly and slidably connected in the liquid transfer box, a driving frame is slidably connected in the base, the rotating shaft passes through the driving frame, a top block is fixedly connected to the side wall of the rotating shaft, the top block abuts against the inner side wall of the driving frame, a plurality of sliding columns are sealingly and slidably connected to the side wall of the liquid transfer box, one end of the sliding column extends through the liquid transfer box and is fixedly connected to the side wall of the pump block, and the other end extends through the base and is fixedly connected to the side wall of the driving frame, the liquid transfer box, the base and the water tank are jointly penetrated and fixedly connected with two third tubes, the inner bottom wall of the base is fixedly connected with an intermediate block, the intermediate block and the liquid transfer box are jointly penetrated and fixedly connected with two sixth tubes, and the intermediate block, the base and the first tube are jointly penetrated and fixedly connected with a fourth tube.

[0009] Furthermore, a driving mechanism is provided at the base, and the driving mechanism includes two worm gears, the worm gears are fixedly connected through the rotating shaft, and the second side block and the base are rotatably connected through a bearing, and two linkage shafts are jointly penetrated and fixedly connected with the base through a bearing, and one end of the linkage shaft located in the base is penetrated and fixedly connected with a worm wheel, and the worm wheel is meshed with the corresponding worm gear, and one end of the linkage shaft located in the second side block is fixedly connected with the first bevel gear, and the other end of the linkage shaft located in the second side block is fixedly connected with the second bevel gear, and the side walls of the first side block and the second side block on the opposite side are both penetrated and rotatably connected with roller shafts through bearings, and a conveying roller is fixedly connected between the corresponding two roller shafts, and one of the roller shafts and one of the second tubes are both penetrated and fixedly connected with a third bevel gear, and the first bevel gear and the second bevel gear are meshed with the corresponding third bevel gear, wherein the two roller shafts and the first tube are both penetrated and fixedly connected with gears, and the corresponding two gears are meshed.

[0010] Furthermore, a winding mechanism is provided at the second side block, and the winding mechanism includes a winding rod, and the winding rod is rotatably connected to the side wall of the second side block through a bearing, and the winding rod and one end of one of the rollers located in the second side block are both fixedly connected with a pulley, and the two pulleys are jointly tensioned with a synchronous belt, and the side wall of the first side block is fixedly connected to a supporting block by bolts.

[0011] Furthermore, a plurality of guide rollers are rotatably connected between the first side block and the second side block via bearings.

[0012] Furthermore, one-way valves are provided in the third tube and the sixth tube, and a plurality of heat sinks are fixedly connected through the side wall of the water tank.

[0013] Furthermore, the number of teeth of the first bevel gear is smaller than the number of teeth of the second bevel gear, the side wall of the cooling roller is coated with a heat-conducting rubber pad, and the side wall of the conveying roller is coated with a rubber layer.

[0014] The present invention has the following advantages:

[0015] 1. Through the contact between the film and the cooling roller, the circulation of the coolant takes away the heat of the film, thereby dissipating the heat of the produced film. Compared with the existing technology of dissipating heat by natural cooling, it has higher heat dissipation efficiency and does not need to extend the production line, greatly reducing the length of the production line;

[0016] 2. During the circulation process of the coolant taking away the heat of the film, it will return to the water tank through the fifth pipe. During the circulation process of the fifth pipe, it will pass through each feed hopper and contact with the raw materials in the feed hopper. The raw materials in the feed hopper are preheated by the heat of the film, thereby reusing the heat of the film, making the device more energy-efficient;

[0017] 3. It is driven by a servo motor and drives the cooling roller, conveying roller and winding rod to rotate through the traditional mechanical structure, so that the device can complete the conveying and winding of the film without the need for multiple motors and control systems, which greatly reduces the equipment cost. Compared with the complex control system, the mechanical structure is more convenient for later maintenance, making the device more suitable for small processing plants;

[0018] 4. By setting the number of teeth of the first bevel gear and the second bevel gear, the speed of the conveying roller is slightly greater than that of the cooling roller, so that the film is subjected to a certain tensile force between the conveying roller and the cooling roller, so that the film is completely flattened when passing through the corona treatment machine, thereby ensuring good corona treatment and avoiding wrinkles that affect the corona treatment effect;

[0019] 5. The cooling liquid circulation speed is related to the film conveying speed by driving through mechanical structure transmission. When the conveying speed is faster, the cooling liquid circulation speed is also faster. On the contrary, the circulation is relatively slow. Therefore, the cooling liquid circulation speed can be automatically adjusted according to the conveying speed, which greatly improves the automation degree of the device.

[0020] 6. While the coolant is circulating, the heat of the coolant is used for preheating. At the same time, the extrusion temperature can be sensed by the coolant, and the feed speed can be automatically adjusted according to the extrusion temperature to avoid overheating caused by slow feed due to high extrusion temperature, and to avoid insufficient melting caused by fast feed due to low extrusion temperature, so as to ensure good extrusion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a five-layer co-extrusion film production unit proposed by the present invention;

[0022] Figure 2 This is a structural schematic diagram of a five-layer co-extrusion film production unit proposed by the present invention from another perspective;

[0023] Figure 3 This is a schematic diagram of the internal structure of a five-layer co-extrusion film production unit proposed by the present invention under a longitudinal section;

[0024] Figure 4 This is a schematic diagram of the internal structure of a five-layer co-extrusion film production unit under a cross section proposed by the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of a five-layer co-extrusion film production unit proposed by the present invention under another longitudinal section;

[0026] Figure 6 This is a schematic diagram of the internal structure of a first side block in a five-layer co-extrusion film production unit proposed by the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the second side block in a five-layer co-extrusion film production unit proposed by the present invention;

[0028] Figure 8 This is a schematic diagram of the internal structure of a feed hopper in a five-layer co-extrusion film production unit proposed by the present invention.

[0029] In the figure: 1, base; 2, water tank; 3, extruder; 4, feed hopper; 401, sleeve; 402, adjustment column; 403, phase change liquid; 404, baffle; 5, die head; 6, first side block; 7, second side block; 8, first tube; 9, second tube; 10, cooling roller; 11, heat conducting sheet; 12, servo motor; 13, liquid transfer box; 14, pump block; 15, drive frame; 16, rotating shaft; 17, top block; 18, slide column; 19, third Tube; 20, sixth tube; 21, middle block; 22, fourth tube; 23, side block; 24, fifth tube; 25, roller; 26, conveyor roller; 27, gear; 28, worm; 29, linkage shaft; 30, worm wheel; 31, first bevel gear; 32, second bevel gear; 33, third bevel gear; 34, winding rod; 35, pulley; 36, synchronous belt; 37, supporting block; 38, guide roller; 39, corona treater; 40, heat sink. DETAILED DESCRIPTION

[0030] Reference Figure 1-7 A five-layer co-extrusion film production unit includes a hollow base 1, five extruders 3 are arranged on the base 1, a feed hopper 4 is arranged on the extruder 3, a water tank 2 is fixedly connected to the base 1, a die head 5 is fixedly connected to the side wall of the water tank 2 through a rod, the extruder 3 is connected to the die head 5, and the extruder 3 is connected to the die head 5 through a pipe fitting (such as Figure 1 As shown in the figure, a first side block 6 and a second side block 7 are fixedly connected to the base 1, both of which are hollow structures, a servo motor 12 is fixedly connected to the side wall of the base 1 through a bracket, an output shaft of the servo motor 12 is fixedly connected to a rotating shaft 16, and the rotating shaft 16 and the base 1 are rotatably connected through a bearing, and a corona treater 39 is arranged between the first side block 6 and the second side block 7.

[0031] A cooling mechanism is provided at the first side block 6 and the second side block 7. The cooling mechanism includes two first tubes 8 and two second tubes 9. The first tube 8 is rotatably connected to the first side block 6 through a bearing, and the second tube 9 is rotatably connected to the second side block 7 through a bearing. The corresponding first tube 8 and second tube 9 are jointly penetrated and fixedly connected with a cooling roller 10. The cooling roller 10 is a hollow structure and a plurality of heat conducting sheets 11 are fixedly connected to its inner side wall. The heat conducting sheets 11 are staggered up and down (such as Figure 3As shown in the figure, the arrangement of the heat conducting sheet 11 can increase the contact area between the coolant and the cooling roller 10, and at the same time can increase the travel distance of the coolant in the cooling roller 10, thereby ensuring that the coolant can better exchange heat with the cooling roller 10. The side wall of the second side block 7 is fixedly connected with a side block 23, and the side block 23 is a hollow structure. The second pipe 9 is rotatably connected to the side block 23 through a bearing and extends to the inside thereof. The side block 23 and the water tank 2 are jointly fixedly connected with a fifth pipe 24, and the fifth pipe 24 is fixedly connected to the feed hopper 4 through the fifth pipe 24. The side wall of the tube 24 located in the feed hopper 4 is penetrated and fixedly connected with two sliding sleeves 401, and the sliding sleeve 401 is sealed and slidably connected with an adjusting column 402. The sliding sleeve 401 is filled with a phase change liquid 403. The phase change liquid 403 is carbon tetrachloride, which has a boiling point of 80°C, and the extrusion temperature is about 120°C. The change in the state of carbon tetrachloride can reflect the temperature of the coolant at this time. The end of the adjusting column 402 located outside the sliding sleeve 401 is fixedly connected with a baffle 404, and the two baffles 404 are symmetrically arranged (such as Figure 8 As shown in the figure, the raw material enters from the gap between the two baffles 404. The gap between the two baffles 404 can be adjusted to adjust the feeding speed. The baffle 404 is connected with the feed hopper 4 through sliding. The sleeve 401 is made of copper alloy and has better thermal conductivity, so that the heat can be better transferred to the phase change liquid 403 of the sleeve 401. During the circulation of the coolant, when it circulates to the sleeve 401, the phase change liquid 403 senses the temperature of the coolant, and the state of the phase change liquid 403 changes with the temperature of the coolant. When the temperature When it is too high, the more gaseous part of the phase change liquid 403 is, the larger its volume is, so that the adjusting column 402 slides to the outside of the sleeve 401, thereby increasing the distance between the two baffles 404, and finally increasing the feeding speed. On the contrary, the phase change liquid 403 has a larger liquid part and its volume is relatively small, and the adjusting column 402 will slide to the inside of the sleeve 401, so that the distance between the two baffles 404 is reduced, and finally reducing the feeding speed, thereby automatically adjusting the feeding speed according to the extrusion temperature to ensure a good extrusion effect.

[0032] The cooling mechanism also includes a hollow liquid transfer box 13 (such as Figure 4 As shown in the figure, the liquid box 13 is fixedly connected to the bottom wall of the base 1, the pump block 14 is sealed and slidably connected in the liquid box 13, the driving frame 15 is slidably connected in the base 1, the rotating shaft 16 passes through the driving frame 15, and the side wall of the rotating shaft 16 is fixedly connected to the top block 17, the top block 17 is against the inner side wall of the driving frame 15, and the top block 17 is located in the driving frame 15 (as shown in the figure). Figure 4 and Figure 5As shown in the figure, the top block 17 will alternately abut against the inner wall of the driving frame 15 during the rotation of the rotating shaft 16, thereby driving the driving frame 15 to reciprocate. The side wall of the liquid-passing box 13 is sealed and penetrated with a plurality of slide columns 18 for sliding connection. A sealing gasket is provided at the penetration sliding connection between the slide column 18 and the liquid-passing box 13, thereby ensuring the sealing of the sliding connection and avoiding leakage. One end of the slide column 18 penetrates and extends into the liquid-passing box 13 and is fixedly connected to the side wall of the pump block 14, and the other end penetrates and extends into the base 1 and is fixedly connected to the side wall of the driving frame 15. The liquid-passing box 13, The base 1 and the water tank 2 are connected to two third tubes 19 through and fixedly connected together. The inner bottom wall of the base 1 is fixedly connected to an intermediate block 21. The intermediate block 21 and the liquid transfer box 13 are connected to two sixth tubes 20 through and fixedly connected together. The intermediate block 21, the base 1 and the first tube 8 are connected to a fourth tube 22 through and fixedly connected together. The rotation of the rotating shaft 16 drives the top block 17 to rotate. The rotation of the top block 17 drives the driving frame 15 to reciprocate through contact with the inner side wall of the driving frame 15. The driving frame 15 drives the pump block 14 to reciprocate through the sliding column 18. The pump block 14 reciprocates When the cooling liquid in the water tank 2 is pumped into the liquid tank 13 through the third pipe 19, the cooling liquid is pumped into the middle block 21 through the sixth pipe 20. After the cooling liquid enters the middle block 21, it enters the cooling roller 10 through the fourth pipe 22 and the first pipe 8. The cooling roller 10 contacts the film and transfers the heat of the film into the cooling liquid of the cooling roller 10. When the cooling liquid passes through the cooling roller 10, it takes away the heat on the cooling roller 10 and enters the side block 23 through the second pipe 9. Then, the cooling liquid with heat enters the fifth pipe 24 from the side block 23. , through the fifth tube 24 through each feed hopper 4, the raw materials in the feed hopper 4 are preheated by the heat of the coolant itself, and then the coolant enters the water tank 2 to cool down, waiting to continue circulating, and the produced film is cooled by the circulation of the coolant to ensure a better cooling effect without the need for a long conveyor line. At the same time, the heat of the film can also be used to preheat the subsequent raw materials, reducing the heating time of the raw materials in the extruder 3, improving the processing efficiency, and realizing the recycling of energy, making the unit more energy-efficient.

[0033] A driving mechanism is provided at the base 1, and the driving mechanism includes two worms 28, which are fixedly connected to the rotating shaft 16 through the second side block 7 and the base 1 through the bearings. There are two linkage shafts 29 that are rotatably connected, and one end of the linkage shaft 29 located in the base 1 is fixedly connected to a worm wheel 30, and the worm wheel 30 is meshed with the corresponding worm 28. One end of one linkage shaft 29 located in the second side block 7 is fixedly connected to a first bevel gear 31, and the other end of the linkage shaft 29 located in the second side block 7 is fixedly connected to a second bevel gear 32 (such as Figure 7As shown), the side walls on the opposite side of the first side block 6 and the second side block 7 are both rotatably connected with roller shafts 25 through bearings, and a conveying roller 26 is fixedly connected between the corresponding two roller shafts 25. The roller diameter of the conveying roller 26 is consistent with that of the cooling roller 10. One of the roller shafts 25 and one of the second tubes 9 are both fixedly connected with a third bevel gear 33, and the first bevel gear 31 and the second bevel gear 32 are meshed with the corresponding third bevel gear 33. The two roller shafts 25 and the first tube 8 are both fixedly connected with gears 27, and the corresponding two gears 27 are meshed.

[0034] A winding mechanism is provided at the second side block 7, and the winding mechanism includes a winding rod 34, which is rotatably connected to the side wall of the second side block 7 through a bearing, and the winding rod 34 and one end of one of the rollers 25 located in the second side block 7 are both fixedly connected with a pulley 35, and the two pulleys 35 are jointly tensioned with a synchronous belt 36, and the side wall of the first side block 6 is fixedly connected with a supporting block 37 by bolts, and the supporting block 37 is used to support the winding rod 34. The bolt fixing method makes it easier to disassemble the supporting block 37, and is driven by a servo motor 12, and the cooling roller 10, the conveying roller 26 and the winding rod 34 are driven to rotate through a traditional mechanical structure, so that the device does not need multiple motors and control systems to cooperate to complete the conveying and winding of the film, which greatly reduces the equipment cost, and the mechanical structure is more convenient for later maintenance than a complex control system, so that the device can be better suitable for small processing plants.

[0035] It is worth mentioning that the drive is carried out by mechanical structure transmission. The rotating shaft 16 determines the rotation speed of the top block 17 and the rotation speed of the worm 28. The rotation speed of the top block 17 determines the circulation speed of the coolant. The rotation speed of the worm 28 determines the speed of film transportation. Therefore, the circulation speed of the coolant is related to the speed of film transportation. When the transportation speed is faster, the circulation speed of the coolant is also faster. Conversely, when the film transportation speed is slower, the circulation speed of the coolant is also slower. Therefore, the circulation speed of the coolant can be automatically adjusted according to the transportation speed, which ensures a good cooling effect while greatly improving the degree of automation of the device.

[0036] A plurality of guide rollers 38 are rotatably connected between the first side block 6 and the second side block 7 via bearings.

[0037] A one-way valve is provided in each of the third pipe 19 and the sixth pipe 20. The one-way valve in the third pipe 19 only allows the coolant to enter the liquid transfer tank 13 from the water tank 2, and the one-way valve in the sixth pipe 20 only allows the coolant to enter the intermediate block 21 from the liquid transfer tank 13. A plurality of heat sinks 40 are fixedly connected to the side wall of the water tank 2. The heat sink 40 increases the contact area between the coolant and the outside, thereby better dissipating heat.

[0038] The number of teeth of the first bevel gear 31 is slightly smaller than the number of teeth of the second bevel gear 32. The setting of the number of teeth of the first bevel gear 31 and the second bevel gear 32 will make the rotation speed of the second tube 9 slightly lower than the rotation speed of the roller 25, so that the rotation speed of the conveying roller 26 is slightly greater than the rotation speed of the cooling roller 10, so that the film is subjected to a certain tensile force between the conveying roller 26 and the cooling roller 10, and the smaller tensile force generated by the smaller speed difference will not tear the film. The film is flattened by the tensile force to ensure that it passes through the corona treatment machine 39 in a flattened state, thereby ensuring a better corona treatment effect and avoiding wrinkles affecting the corona treatment effect, thereby affecting the film quality. The side wall of the cooling roller 10 is coated with a thermally conductive rubber pad, which can ensure that the cooling roller 10 is completely fitted with the film, thereby better heat conduction, and the thermally conductive rubber pad can also increase the friction between the cooling roller 10 and the film to avoid slipping. The side wall of the conveying roller 26 is coated with a rubber layer, and the rubber layer on the conveying roller 26 can increase the friction between the conveying roller 26 and the film to avoid slipping.

[0039] In the present invention, the required different raw materials are added into the feed hopper 4, and the winding roller is connected to the winding rod 34, and the extruder 3 is turned on. The extruder 3 melts and extrude the raw materials in the feed hopper 4. Five extruders 3 extrude the raw materials into the die head 5, thereby forming a multi-layer composite film, and the film passes through the guide roller 38 and enters between the two cooling rollers 10.

[0040] The servo motor 12 drives the rotating shaft 16 to rotate, and the rotating shaft 16 drives the worm 28 to rotate. The rotation of the worm 28 drives the worm wheel 30 meshing therewith to rotate. The two worm wheels 30 drive the corresponding first bevel gear 31 and second bevel gear 32 to rotate through the linkage shaft 29. The rotation of the first bevel gear 31 drives the third bevel gear 33 on the second tube 9 to rotate, and then through the meshing of the gear 27, the two cooling rollers 10 are rotated, and the second bevel gear 32 drives the third bevel gear 33 on the roller shaft 25 to rotate, and then through the meshing of the gear 27, the two conveying rollers 26 are rotated, thereby conveying the produced film.

[0041] The rotation of the rotating shaft 16 will also drive the top block 17 to rotate. The rotation of the top block 17 drives the driving frame 15 to reciprocate through the contact with the inner wall of the driving frame 15. The driving frame 15 drives the pump block 14 to reciprocate through the sliding column 18. When the pump block 14 reciprocates, the coolant in the water tank 2 is pumped into the liquid tank 13 through the third pipe 19, and then the coolant is pumped into the middle block 21 through the sixth pipe 20. After the coolant enters the middle block 21, it enters the cooling roller 10 through the fourth pipe 22 and the first pipe 8. The cooling roller 10 and the film The heat of the film is transferred into the coolant of the cooling roller 10 by contact. When the coolant passes through the cooling roller 10, it takes away the heat on the cooling roller 10 and enters the side block 23 through the second tube 9. Then the coolant with heat enters the fifth tube 24 from the side block 23, passes through each feed hopper 4 through the fifth tube 24, and preheats the raw materials in the feed hopper 4 by the heat of the coolant itself. Then the coolant enters the water tank 2 to cool down and waits for continued circulation. The produced film is cooled by the circulation of the coolant.

[0042] During the coolant circulation process, when it circulates to the sleeve 401, the phase change liquid 403 senses the temperature of the coolant, and the state of the phase change liquid 403 changes with the temperature of the coolant. When the temperature is too high, the more gaseous part of the phase change liquid 403, the larger its volume, so that the adjustment column 402 slides to the outside of the sleeve 401, thereby increasing the distance between the two baffles 404, and finally increasing the feeding speed. On the contrary, the liquid part of the phase change liquid 403 is large, and its volume is relatively small, and the adjustment column 402 will slide to the inside of the sleeve 401, so that the distance between the two baffles 404 is reduced, and finally the feeding speed is reduced, thereby automatically adjusting the feeding speed according to the extrusion temperature.

[0043] When the conveying roller 26 and the cooling roller 10 convey the film, the number of teeth of the first bevel gear 31 and the second bevel gear 32 is set so that the rotation speed of the conveying roller 26 is slightly greater than the rotation speed of the cooling roller 10, and the roller diameters of the conveying roller 26 and the cooling roller 10 are consistent, so that the linear speed of the conveying roller 26 is slightly greater than the linear speed of the cooling roller 10, so that the film between the conveying roller 26 and the cooling roller 10 is subjected to a certain tensile force, and the film is flattened by the tensile force to ensure that it passes smoothly through the corona treatment machine 39, and the corona treatment machine 39 is used to perform corona treatment on the surface of the film.

[0044] When one of the rollers 25 rotates, the drive through the pulley 35 and the synchronous belt 36 causes the winding rod 34 to rotate, and the produced film is wound up. After one roller is wound up, the supporting block 37 is removed, and the wound film is taken down, and then the next roller to be wound up is loaded to continue the production and winding.

Claims

1. A five-layer co-extrusion film production unit, comprising a hollow base (1), characterized in that: The base (1) is provided with five extruders (3), the extruders (3) are provided with a feed hopper (4), the base (1) is fixedly connected with a water tank (2), the side wall of the water tank (2) is fixedly connected with a die head (5) via a rod, the extruder (3) is connected to the die head (5), the base (1) is fixedly connected with a first side block (6) and a second side block (7), the first side block (6) and the second side block (7) are both hollow structures, the side wall of the base (1) is fixedly connected with a servo motor (12) via a bracket, the output shaft of the servo motor (12) is fixedly connected with a rotating shaft (16), the rotating shaft (16) and the base (1) are rotatably connected via a bearing, a corona treatment device (39) is provided between the first side block (6) and the second side block (7), and a cooling mechanism is provided at the first side block (6) and the second side block (7); The cooling mechanism comprises two first tubes (8) and two second tubes (9), wherein the first tube (8) is rotatably connected to the first side block (6) via a bearing, and the second tube (9) is rotatably connected to the second side block (7) via a bearing, and the corresponding first tube (8) and second tube (9) are jointly rotatably connected to a cooling roller (10), wherein the cooling roller (10) is a hollow structure and a plurality of heat conducting plates (11) are fixedly connected to the inner wall thereof, and the side wall of the second side block (7) is fixedly connected to a side block (23), wherein the side block (23) is a hollow structure, and the second tube (9) is rotatably connected to the side block (23) via a bearing. The side block (23) and the water tank (2) are connected and extend to the inside thereof, the side block (23) and the water tank (2) are jointly penetrated and fixedly connected with a fifth tube (24), the fifth tube (24) is penetrated and fixedly connected with the feed hopper (4), a side wall of the fifth tube (24) located in a section inside the feed hopper (4) is penetrated and fixedly connected with two sliding sleeves (401), an adjusting column (402) is sealingly and slidingly connected inside the sliding sleeve (401), the sliding sleeve (401) is filled with a phase change liquid (403), one end of the adjusting column (402) located outside the sliding sleeve (401) is fixedly connected with a baffle (404), and the baffle (404) is penetrated and slidably connected with the feed hopper (4).

2. A five-layer co-extrusion film production unit according to claim 1, characterized in that: The cooling mechanism further comprises a hollow liquid-passing box (13), the liquid-passing box (13) being fixedly connected to the inner bottom wall of the base (1), a pump block (14) being sealingly and slidably connected inside the liquid-passing box (13), a drive frame (15) being slidably connected inside the base (1), the rotating shaft (16) passing through the drive frame (15), a top block (17) being fixedly connected to the side wall of the rotating shaft (16), the top block (17) being abutted against the inner side wall of the drive frame (15), a plurality of sliding columns (18) being sealingly and slidably connected to the side wall of the liquid-passing box (13), one end of each sliding column (18) passing through and extending to the liquid-passing box (13). The liquid box (13) is fixedly connected to the side wall of the pump block (14), and the other end extends through the base (1) and is fixedly connected to the side wall of the drive frame (15). The liquid box (13), the base (1) and the water box (2) are fixedly connected to two third tubes (19). The bottom wall of the base (1) is fixedly connected to an intermediate block (21). The intermediate block (21) and the liquid box (13) are fixedly connected to two sixth tubes (20). The intermediate block (21), the base (1) and the first tube (8) are fixedly connected to a fourth tube (22).

3. A five-layer co-extrusion film production unit according to claim 2, characterized in that: The base (1) is provided with a driving mechanism, the driving mechanism comprising two worms (28), the worms (28) being fixedly connected to the rotating shaft (16), the second side block (7) and the base (1) being connected to two linkage shafts (29) being connected to each other through bearings for rotation, one end of the linkage shaft (29) located in the base (1) being fixedly connected to a worm wheel (30), the worm wheel (30) being meshed with the corresponding worm (28), one end of one linkage shaft (29) located in the second side block (7) being fixedly connected to a first bevel gear (31), and the other end of the linkage shaft (29) located in the second side block (7) being fixedly connected to a first bevel gear (31). A second bevel gear (32) is fixedly connected, and the side walls of the first side block (6) and the second side block (7) on the opposite side are both rotatably connected to a roller shaft (25) through a bearing, and a conveying roller (26) is fixedly connected between the two corresponding roller shafts (25), and one of the roller shafts (25) and one of the second tubes (9) are both fixedly connected to a third bevel gear (33), and the first bevel gear (31) and the second bevel gear (32) are meshed with the corresponding third bevel gear (33), and the two roller shafts (25) and the first tube (8) are both fixedly connected to a gear (27), and the two corresponding gears (27) are meshed.

4. A five-layer co-extrusion film production unit according to claim 3, characterized in that: A winding mechanism is provided at the second side block (7), and the winding mechanism comprises a winding rod (34), the winding rod (34) and the side wall of the second side block (7) are rotatably connected through a bearing, the winding rod (34) and one end of one of the rollers (25) located in the second side block (7) are both fixedly connected with a pulley (35), the two pulleys (35) are tensioned together with a synchronous belt (36), and the side wall of the first side block (6) is fixedly connected with a supporting block (37) through bolts.

5. A five-layer co-extrusion film production unit according to claim 1, characterized in that: A plurality of guide rollers (38) are rotatably connected between the first side block (6) and the second side block (7) via bearings.

6. A five-layer co-extrusion film production unit according to claim 2, characterized in that: One-way valves are provided in both the third tube (19) and the sixth tube (20), and a plurality of heat sinks (40) are penetrated and fixedly connected to the side wall of the water tank (2).

7. A five-layer co-extrusion film production unit according to claim 4, characterized in that: The number of teeth of the first bevel gear (31) is smaller than the number of teeth of the second bevel gear (32); the side wall of the cooling roller (10) is coated with a heat-conducting rubber pad; and the side wall of the conveying roller (26) is coated with a rubber layer.

Images