Production line of PET (Polyethylene Terephthalate) sheet production unit

Abstract

The invention provides a PET sheet production unit assembly line, and relates to the field of PET sheet production and processing. The production line integrates the full-automatic production process of material feeding, drying, preheating, extruding, calendaring, cooling, edge cutting, oil coating, drying and rolling. By optimizing the connection and coordination among the process links, the consistency of the production efficiency and the product quality is effectively improved. And the double-station drying tank design is adopted, so that the production continuity is ensured, and the pause caused by frequent shutdown and cleaning in the traditional equipment is avoided. The temperature control system, the water circulation system, the cooling bracket and other supporting facilities ensure the temperature stability in the material processing process, and the quality problem caused by temperature fluctuation is reduced. Meanwhile, due to the integrated design, the production site and the equipment space are greatly saved, and the energy consumption is reduced. According to the production line, coordinated operation of all the devices is achieved through an automatic control system, human intervention is reduced, and the stability and safety of the production process are improved.

Description

Technical Field

[0001] The invention relates to the field of PET sheet production and processing, and in particular to a PET sheet production unit assembly line. Background Art

[0002] The existing production process design may not fully consider the coordination between various links, resulting in insufficient optimization of the process arrangement. Such a process may lead to problems such as low production efficiency and waste of resources.

[0003] If the equipment and production lines involved in the process are too large, it may mean that more production areas are needed. This not only increases the demand for space, but may also cause inconvenience in logistics and personnel scheduling, further affecting production efficiency.

[0004] The current production method relies on the collaboration of multiple stand-alone equipment and multiple workshops, which may lead to a lack of good collaboration and communication between workshops. As a result, production efficiency and work progress will be affected by different factors, and it is impossible to achieve efficient and smooth operation.

[0005] A single device may have unstable performance due to unreasonable design, insufficient maintenance or technical problems, and when multiple devices work together, they may be out of sync due to differences in technology and scheduling. This will cause the overall operation of the production line to be unsmooth, affecting production efficiency and product quality.

[0006] Due to the instability of equipment and unreasonable process flow, it is impossible to ensure that the raw materials used meet the set quality standards, and it is difficult to control the consistency of the final product. This will not only affect the quality stability of the product, but may also affect the product's performance, which will have a negative impact on consumers and the market. Summary of the invention

[0007] A PET sheet production line comprises a pre-crystallization drying tank, an integrated co-extruded plastic extruder, a three-roll calender, a drying, traction and cutting integrated machine, a double-station winder and a material box, wherein a material box is arranged below the pre-crystallization drying tank, another material box is arranged on one side of the pre-crystallization drying tank, the material box is connected to a hopper arranged on the integrated co-extruded plastic extruder through a spiral feeding barrel, the integrated co-extruded plastic extruder is connected to the three-roll calender through a screen changer, a melt pump and a supply composite mold, the three-roll calender is connected to the drying, traction and cutting integrated machine through a cooling and shaping frame, a trimming device is arranged on the cooling and shaping frame, and an edge material collecting device and an oiling device are arranged below the drying, traction and cutting integrated machine.

[0008] Furthermore, the pre-crystallization drying tank also includes a bracket, a frame is arranged above the bracket, two drying tanks are installed above the frame, a hot air duct is installed on one side of the two drying tanks, a hot air blower is installed on the top of the hot air duct, the hot air blower is connected to a heating pipe and installed inside the hot air duct, the hot air duct is connected to a distributor, a pulley is arranged above the drying tank, the pulley is connected to a motor, a spiral feeding shaft is connected below the pulley, a feeding cylinder is installed on the outside of the spiral feeding shaft, and a discharge cylinder is arranged below the drying tank.

[0009] Furthermore, the integrated co-extrusion plastic extruder also includes a combined frame, a covering main unit and an inner main unit are arranged above the combined frame, a cooling fan is arranged below the covering main unit and the inner main unit, a reducer 1 is connected to the rear of the covering main unit, a reducer 2 is connected to the rear of the inner main unit, the reducer 1 and the reducer 2 are respectively connected to a V-belt pulley, the outer layers of the two V-belt pulleys are installed with V-belts, and the pulleys below the two V-belt pulleys are respectively connected to V-belt driving motors, the covering main unit and the inner main unit are provided with a heat preservation cover on the outer layer, a heating ring is arranged inside the heat preservation cover, a barrel and a screw are arranged inside the covering main unit and the inner main unit, the barrel and the screw are installed in the heat preservation cover and the heating ring, a hopper is installed on the upper side of the end of the covering main unit and the inner main unit, a power distribution cabinet is installed on the side of the combined frame, and the screw is installed inside the barrel.

[0010] Furthermore, the three-roll calender includes a frame, the frame slope angle can be 45°, 90°, 180°, the frame is equipped with two movable calendering rollers, a fixed calendering roller is arranged between the two movable calendering rollers, the movable calendering roller and the fixed calendering roller are connected to a bearing on one side, the bearing is installed on a bearing seat, a bearing cover is installed on the outer side of the bearing, the movable calendering roller and the fixed calendering roller are connected to a reducer on the other side, the reducer is connected to a transmission motor, lifts are installed on both sides of the bottom of the frame, one side of the lift is connected to a lifting motor, the The two elevators are connected by a synchronous shaft, a walking assembly is installed at the bottom of the frame, a lifting screw is arranged above the walking assembly, elevators are installed on both sides above the frame and one side is connected to a lifting motor, a manual adjustment hand wheel is arranged on the elevator on one side above the frame, the elevator is connected to push a mobile calendering roller, a water circulation cooler is installed on one side of the frame, the water circulation cooler is connected to the mobile calendering roller and the fixed calendering roller, a power distribution cabinet is installed on one side of the frame, and the power distribution cabinet is connected to the transmission motor, the elevator, the water circulation cooler and the lifting motor.

[0011] Furthermore, the drying, traction and cutting integrated machine also includes an integrated frame, a lower heating box is installed above the integrated frame, a heating tube is installed in the lower heating box, an upper heating box is installed above the lower heating box, two traction rubber rollers are installed on the sides of the lower heating box, sliding bearings are connected to both sides of the traction rubber roller, the sliding bearings are installed on the slide seat, a clamping cylinder is installed above the slide seat, a traction machine transmission shaft is connected to one side of the traction rubber roller, the traction machine transmission shaft sleeve is provided with a chain, the chain is connected to the traction transmission reduction motor, a cutting platform is installed on one side of the traction rubber roller, a transmission shaft is installed below the cutting platform, the A transmission motor is installed at the rear of the transmission shaft, support bearings are connected to both sides of the transmission shaft, and a transmission sprocket is connected to the other side, eccentric wheels are connected to both sides of the transmission shaft, bearings are installed in the eccentric wheels, a scissors frame is connected above the eccentric wheel, an upper scissors is installed in the scissors frame, slide rails are installed on both sides of the scissors frame, a movable hinge seat is installed on the outer side of the upper heating box, the movable hinge seat is connected to an opening cylinder, and the opening cylinder is installed on the integrated frame through a cylinder bracket, a lower scissors is installed on the cutting platform below the upper scissors, a control cabinet is installed on one side of the integrated frame, and a walking wheel assembly is installed below the integrated frame.

[0012] Compared with the prior art, the present invention has the following advantages: Integrated equipment integrates multiple production links (such as feeding, mixing, drying, crystallization, extrusion, etc.) into one system, which not only optimizes the process design, but also makes each link closely connected, avoiding efficiency loss caused by link fragmentation or unclear process. For example, the smooth cooperation of the extruder and the three-roll calender can ensure the uniformity and precision of the product and reduce pauses and waste in the production process.

[0013] By integrating multiple steps such as feeding, mixing, drying, crystallization, and extrusion into one system, the number of equipment and the required floor space can be significantly reduced. The compact design of the production line and the reasonable layout of the equipment not only reduce the demand for space, but also avoid duplication of functions between multiple equipment, reducing energy and resource waste.

[0014] The integrated system ensures smooth connection between various production links and avoids the problem of asynchrony between equipment. Each link is operated under the same automated control system, and the performance of the equipment is uniformly monitored and adjusted, making the system operation more stable and coordinated. For example, the close cooperation between the extruder, mold and calender can ensure the stability and consistency of the product.

[0015] Through integrated equipment, each link can be monitored and adjusted in real time. For example, in the drying, crystallization, extrusion and other steps, all parameters (such as temperature, pressure, humidity, etc.) can be optimized under the same control platform to ensure that the raw material processing in each link meets the predetermined quality requirements. The integrated system can accurately control each link to ensure the consistency of production, thereby ensuring the stability of product quality.

[0016] The integrated system makes the entire production process more accurate and controllable through close cooperation and synchronous operation. The efficient coordination between equipment ensures the stability of the production process. At the same time, every link of the product from loading to finished product can be adjusted and monitored in real time to meet different production needs. In this way, the quality of the product can be effectively controlled, ultimately ensuring its stability and consistency, thereby improving its performance and market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the drying tank of the present invention; Figure 3 is a cross-sectional view of a drying tank of the present invention; Figure 4 A top view of the drying tank of the present invention; Figure 5 This is a schematic diagram of the overall structure of the integrated co-extrusion plastic extruder of the present invention; Figure 6 This is a front view of the integrated co-extrusion plastic extruder of the present invention; Figure 7 It is a top view of the integrated co-extrusion plastic extruder of the present invention; Figure 8 This is an enlarged view of the integrated co-extrusion plastic extruder A of the present invention; Fig. 9 It is a schematic diagram of the overall structure of the three-roll calender of the present invention; Fig.10 It is a side view of the three-roll calender of the present invention; Fig.11 This is a schematic diagram of the overall structure of the drying, traction and cutting integrated machine of the present invention; Fig.12 This is an overall cross-sectional view of the drying, traction and cutting integrated machine of the present invention; Fig.13This is a schematic diagram of the overall scissors structure of the drying, traction and cutting integrated machine of the present invention; Among them: 1. Pre-crystallization drying tank; 2. Integrated co-extrusion plastic extruder; 3. Three-roll calender; 4. Drying, traction and cutting integrated machine; 5. Double-station winder; 101. Material box; 102. Spiral loading barrel; 103. Screen changer; 104. Melt pump; 105. Co-extrusion composite mold; 106. Cooling and shaping frame; 107. Trimming device; 108. Edge material collection device; 109. Oiling device; 11. Bracket; 12. Frame; 13. Drying tank; 14. Motor; 15. Hot air blower; 16. Pulley; 17. Feeding barrel; 18. Screw feeding shaft; 19. Hot air duct; 110. Heating pipe; 111. Discharging barrel; 112. Diverter; 21. Combined frame; 22. Power distribution cabinet; 23. Cooling fan; 24. Insulation cover; 25. Hopper; 26. Heating ring; 27. V-belt pulley; 28. V-belt; 29. ​​V-belt drive motor; 210. Reducer 1; 211. Reducer 2; 212. Coated host; 213. Inner host; 214. Screw barrel; 215. Screw; 31. Frame; 32 , power distribution cabinet; 33, mobile calendering roller; 34, fixed calendering roller; 35, bearing seat; 36, bearing; 37, transmission motor; 38, reducer; 39, bearing cover; 310, lift; 311, synchronous shaft; 312, walking assembly; 313, lifting screw rod; 314, water circulation cooler; 315, lifting motor; 316, manual adjustment hand wheel; 41, integrated frame; 42, upper heating box; 43, open cylinder; 44, cylinder bracket; 45, movable hinge seat; 46, lower heating box; 47 , heating tube; 48, clamping cylinder; 49, sliding bearing; 410, sliding seat; 411, traction rubber roller; 412, traction machine drive shaft; 413, cutting platform; 414, slide rail; 415, scissors frame; 416, eccentric wheel; 417, bearing; 418, drive sprocket; 419, drive shaft; 420, lower scissors; 421, drive motor; 422, support bearing; 423, walking wheel assembly; 424, control cabinet; 425, chain; 426, upper scissors; 427, traction drive reduction motor. DETAILED DESCRIPTION

[0019] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and is not a limitation of the scope of protection, applicability or examples set forth in the claims. The functions and arrangements of the elements discussed can be changed without departing from the scope of protection of the contents of this specification. Various examples can omit, replace or add various processes or components as needed. For example, the described method can be performed in an order different from the described order, and various steps can be added, omitted or combined. In addition, the features described relative to some examples can also be combined in other examples.

[0020] As used herein, the term "including" and its variations represent open terms, meaning "including but not limited to". The term "based on" means "based at least in part on". The terms "one embodiment" and "an embodiment" mean "at least one embodiment". The term "another embodiment" means "at least one other embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other definitions may be included below, whether explicit or implicit. Unless the context clearly indicates otherwise, the definition of a term is consistent throughout the specification.

[0021] Example A PET sheet production line comprises a pre-crystallization drying tank 1, an integrated co-extruded plastic extruder 2, a three-roll calender 3, a drying, traction and cutting integrated machine 4, a double-station winder 5, and a material box 101. The pre-crystallization drying tank 1 is provided with a material box 101 below, and another material box 101 is provided on one side of the pre-crystallization drying tank 1. The material box 101 is connected to a hopper 25 provided on the integrated co-extruded plastic extruder 2 through a spiral upper barrel 102. The integrated co-extruded plastic extruder 2 is connected to the three-roll calender 3 through a screen changer 103, a melt pump 104, and a supply composite mold 105. The three-roll calender 3 is connected to the drying, traction and cutting integrated machine 4 through a cooling and shaping frame 106. The cooling and shaping frame 106 is provided with a trimming device 107. The drying, traction and cutting integrated machine 4 is provided with a trimming device 108 and an oiling device 109 connected thereto below.

[0022] Furthermore, the pre-crystallization drying tank 1 also includes a bracket 11, a frame 12 is arranged above the bracket 11, two drying tanks 13 are installed above the frame 12, a hot air duct 19 is installed on one side of the two drying tanks 13, a hot air blower 15 is installed on the top of the hot air duct 19, the hot air blower 15 is connected to a heating pipe 110 and is installed inside the hot air duct 19, the hot air duct 19 is connected to a distributor 112, a pulley 16 is arranged above the drying tank 13, the pulley 16 is connected to a motor 14, a spiral feeding shaft 18 is connected below the pulley 16, a feeding cylinder 17 is installed on the outside of the spiral feeding shaft 18, and a discharge cylinder 111 is arranged below the drying tank 13.

[0023] Furthermore, the integrated co-extrusion plastic extruder 2 also includes a combined frame 21, a covering mainframe 212 and an inner mainframe 213 are arranged above the combined frame 21, a cooling fan 23 is arranged below the covering mainframe 212 and the inner mainframe 213, a reducer 210 is connected to the rear of the covering mainframe 212, and a reducer 211 is connected to the rear of the inner mainframe 213, and the reducer 210 and the reducer 211 are respectively connected to a V-belt pulley 27, and the outer layers of the two V-belt pulleys 27 are installed with a V-belt 28, and the two V-belt pulleys 27 The lower pulleys are respectively connected to the V-belt driving motor 29, the outer layer of the covering main machine 212 and the inner layer main machine 213 is provided with a heat preservation cover 24, and the heat preservation cover 24 is provided with a heating ring 26, the covering main machine 212 and the inner layer main machine 213 are provided with a screw barrel 214 and a screw 215, the screw barrel 214 and the screw 215 are installed in the heat preservation cover 24 and the heating ring 26, the covering main machine 212 and the inner layer main machine 213 are provided with a hopper 25 on the upper side of the end, the power distribution cabinet 22 is installed on the side of the combined frame 21, and the screw 215 is installed inside the screw barrel 214.

[0024] Furthermore, the three-roll calender 3 includes a frame 31, the inclined angle of the frame 31 can be 45°, 90°, and 180°, the frame 31 is installed with two movable calender rollers 33, a fixed calender roller 34 is arranged between the two movable calender rollers 33, a bearing 36 is connected to one side of the movable calender roller 33 and the fixed calender roller 34, the bearing 36 is installed on a bearing seat 35, a bearing cover 39 is installed on the outer side of the bearing 36, a reducer 38 is connected to the other side of the movable calender roller 33 and the fixed calender roller 34, the reducer 38 is connected to a transmission motor 37, and lifts 310 are installed on both sides of the bottom of the frame 31, one side of the lift 310 is connected to a lift motor 315, and the two lifts 310 are connected by The synchronous shaft 311 is connected, a walking component 312 is installed at the bottom of the frame 31, a lifting screw 313 is arranged above the walking component 312, lifts 310 are installed on both sides above the frame 31 and a lifting motor 315 is connected on one side, a manual adjustment hand wheel 316 is arranged on the lift 310 on one side above the frame 31, the lift 310 is connected to push a mobile calendering roller 33, a water circulation cooler 314 is installed on one side of the frame 31, the water circulation cooler 314 is connected to the mobile calendering roller 33 and the fixed calendering roller 34, a power distribution cabinet 32 ​​is installed on one side of the frame 31, and the power distribution cabinet 32 ​​is connected to the transmission motor 37, the lift 310, the water circulation cooler 314, and the lifting motor 315.

[0025] Furthermore, the drying, traction and cutting integrated machine 4 also includes an integrated frame 41, a lower heating box 46 is installed above the integrated frame 41, a heating tube 47 is installed in the lower heating box 46, an upper heating box 42 is installed above the lower heating box 46, two traction rubber rollers 411 are installed on the side of the lower heating box 46, sliding bearings 49 are connected to both sides of the traction rubber roller 411, the sliding bearings 49 are installed on the slide 410, a pressing cylinder 48 is installed above the slide 410, a traction machine transmission shaft 412 is connected to one side of the traction rubber roller 411, the traction machine transmission shaft 412 is sleeved with a chain 425, the chain 425 is connected to the traction transmission reduction motor 427, a cutting platform 413 is installed on one side of the traction rubber roller 411, a transmission shaft 419 is installed below the cutting platform 413, and the transmission shaft 419 A transmission motor 421 is installed at the rear, support bearings 422 are connected to both sides of the transmission shaft 419, and a transmission sprocket 418 is connected to the other side of the transmission shaft 419, eccentric wheels 416 are connected to both sides of the transmission shaft 419, bearings 417 are installed in the eccentric wheels 416, a scissor frame 415 is connected above the eccentric wheel 416, an upper scissor 426 is installed in the scissor frame 415, slide rails 414 are installed on both sides of the scissor frame 415, a movable hinge seat 45 is installed on the outer side of the upper heating box 42, the movable hinge seat 45 is connected to an opening cylinder 43, and the opening cylinder 43 is installed on the integrated frame 41 through a cylinder bracket 44, the cutting platform 413 is installed with a lower scissor 420 located below the upper scissor 426, a control cabinet 424 is installed on one side of the integrated frame 41, and a walking wheel assembly 423 is installed below the integrated frame 41.

[0026] like Figure 2-4 An embodiment provided Two drying tanks are installed side by side, and the integrated design realizes a compact layout of the equipment. While one drying tank is working, the other drying tank can be loaded or discharged, avoiding the need to stop the machine for cleaning after each operation.

[0027] Through this alternating working mode, continuous feeding is achieved. Even if one drying tank is working, the other drying tank can still perform preparation operations such as loading and unloading, avoiding the problems of traditional drying equipment needing to be shut down for cleaning and reloading, and improving the continuity and efficiency of the production line.

[0028] The design optimizes the material conveying and drying process, so that the equipment does not need to be shut down frequently and can continuously perform drying, loading and unloading, greatly improving production efficiency.

[0029] Optimize the hot air system, including the hot air blower 15, the hot air duct 19, the heating pipe 110, and the flow divider 112, to ensure that the hot air is evenly distributed in the drying tank to avoid local overheating or uneven temperature. Hot air duct 19 and hot air blower 15: The hot air blower 15 transmits the hot air to the drying tank 13 through the hot air duct 19. In order to ensure that the air can be evenly distributed in the drying tank, the installation position of the hot air blower and the design of the hot air duct are particularly critical. The design of the hot air duct ensures the uniformity of the hot air flow direction, thereby avoiding uneven distribution of hot air during the drying process, which may cause overheating of some materials, sticking to the wall or uneven drying. The air is heated by the heating pipe 110 so that the hot air maintains a certain temperature before entering the drying tank 13, ensuring temperature stability during the drying process. The heating tube works with the hot air blower 15 to improve the drying and crystallization efficiency through the efficient transmission of hot air, avoiding the problem of material adhesion or incomplete drying caused by local overheating. At the same time, the heat flow direction is changed by the flow divider 112 to make the hot air evenly heated from bottom to top, so as to achieve a better pre-crystallization effect, reduce the friction coefficient between materials, and increase fluidity.

[0030] Through the integrated design and flexible feeding system including the screw feeding shaft 18, feeding cylinder 17, pulley 16 and motor 14, it is ensured that the drying process can be adapted to the properties and characteristics of different materials.

[0031] Inside each drying tank 13, a spiral feed shaft 18 and a feeding barrel 17 are installed. The spiral feed shaft 18 feeds the material evenly into the drying tank by rotating, ensuring the uniform distribution of the material during the drying process. The feeding barrel 17 cooperates with the spiral feed shaft 18 to further ensure the smooth transportation of the material, avoiding the accumulation, agglomeration or retention of the material, resulting in uneven drying effect.

[0032] The pulley 16 is connected to the motor 14 to drive the screw feed shaft 18 so that the feed system can be adjusted according to the load change of the drying tank. When the material inside the drying tank is high in humidity or has a large particle size, the motor 14 can adjust the speed as needed to ensure that the material is transported more smoothly and flexibly. This system can effectively avoid uneven material during the drying process, especially when dealing with materials with high humidity or strong viscosity, and maintain a good drying effect.

[0033] The hot air duct 19 connects the hot air blower 15 and the drying tank 13, and ensures that the hot air can be evenly distributed in the drying tank through a reasonable layout. Design details, such as the selection of the inner diameter of the duct and the optimization of the connection angle, can avoid local air flow obstruction and avoid local excessive temperature causing the material to adhere to the inner wall of the drying tank.

[0034] The heating pipe 110 works in conjunction with the hot air blower 15 to heat the air and send it into the hot air duct 19, and then into the drying tank 13. This process ensures that the temperature of the hot air entering the drying tank is uniform and stable, avoiding the situation where the material sticks to the wall or the baking is uneven due to the local over-high temperature.

[0035] The heating tube 110 is used in combination with the hot air blower 15 to continuously adjust the temperature in the drying tank through the temperature control system to ensure that the temperature is within the ideal range and avoid adhesion problems caused by excessively high temperatures.

[0036] like Figure 5-8 An embodiment provided The combined rack 21 combines two independent extruders into one, significantly reducing the floor space occupied by the equipment. The space that originally needed to be placed for the two devices is now combined into one rack through the integrated design. This design effectively utilizes the space, making the layout of the production line more compact and reducing the free space between the equipment. This not only optimizes the space utilization of the production environment, but also reduces the complexity of the equipment layout.

[0037] Traditional split equipment often affects the overall stability due to the vibration of a single machine. By integrating the covering host 212 and the inner host 213 on a combined frame 21, the rigidity of the entire frame is greatly enhanced, thereby reducing the possible vibration during the operation of the equipment. This design provides a more stable operating basis and avoids the vibration problem caused by the independent operation of two machines in traditional split equipment. The improved stability of the equipment helps to improve production accuracy and production efficiency.

[0038] In a conventional split extruder, since the two devices need to be butted together, any slight error in position will affect the quality of the final product. The covering main machine 212 and the inner layer main machine 213 are installed on the same combined frame 21, ensuring that their relative positions are accurately fixed, reducing the error and risk of leakage during butt connection.

[0039] This design ensures the coordination and accuracy between the equipment, especially when the molds are docked, the height and lateral distance between the covering main machine 212 and the inner layer main machine 213 can be precisely controlled, reducing production problems such as inaccurate docking and material leakage, and improving production stability and product quality.

[0040] In separate devices, each device may need to be adjusted and calibrated separately, which increases the complexity and time cost of the operation. In this integrated design, since the covering host 212 and the inner host 213 are both installed on the same rack, the adjustment of the two hosts can be carried out simultaneously.

[0041] When adjusting, the operator only needs to adjust the position and settings of the two main machines at the same time, avoiding the calibration errors caused by independent adjustments in traditional equipment. This makes the operation process simpler and more direct, reduces the difficulty of debugging, and improves production efficiency.

[0042] The integrated design simplifies the manufacturing and installation process. Since the two main machines have been integrated in the same frame in design, the installation of the main components such as the heat preservation cover 24, the cooling fan 23, the reducer 1 210 and the reducer 2 211 can be carried out centrally, avoiding the complex process of separate installation and connection in the split equipment.

[0043] During installation, the integrity of the equipment greatly reduces the number of operating steps and shortens the time for commissioning and installation. In terms of transportation, this integrated design also reduces the risk of damage that may occur during transportation of the equipment. The overall structure is more compact, the transportation of the equipment is more convenient, and the transportation cost and complexity are reduced.

[0044] The design of the heat preservation cover 24 and the heating ring 26 ensures that the equipment can maintain a stable temperature during operation. The heating ring 26 can help maintain the temperature range required by the equipment during the production process to prevent temperature fluctuations from adversely affecting the production process. For example, in the plastic extrusion process, temperature control is crucial, and the heating ring 26 ensures uniform temperature distribution, which helps to improve the consistency and quality of the product.

[0045] The setting of the cooling fan 23 can adjust the temperature of the screw barrel 214 to keep the temperature at a preset value. At the same time, the cooling fan 23 plays a role in cooling down, which can ensure the reasonable temperature of the extruded plastic and effectively control the temperature of the equipment. In addition, the precise design of the temperature control system improves the safety of the equipment, prevents the plastic temperature from being out of control and equipment damage and safety hazards caused by overheating, and reduces the safety risks that operators may encounter.

[0046] Each component in the design focuses on simplifying the operation process, making it easier for operators to manage the equipment. For example, the hopper 25 is installed on the upper side of the ends of the coating main machine 212 and the inner layer main machine 213 to facilitate feeding and continuous operation.

[0047] according to Figure 9-10 An embodiment provided The distance between the calendering rollers is precisely controlled by the relative movement of the mobile calendering roller 33 and the fixed calendering roller 34 and the height adjustment of the elevator 310, thereby ensuring uniform calendering of materials with different thicknesses and characteristics. This makes the thickness of the PET sheet more uniform during the calendering process, avoids excessive calendering or stretching, and improves the quality of the product.

[0048] Larger operating space and higher operating convenience Through the design of optional bevel angles (45°, 90°, 180°), the equipment can be flexibly adjusted according to different production needs, providing more operating space. Under the 45° angle design, the operating space is significantly improved, making it easier to approach the calender roller for operation and maintenance, avoiding the problem of small operating space in the traditional horizontal structure. This design improves the operability and maintainability of the equipment.

[0049] By lowering the overall height of the equipment, the center of gravity of the equipment is lowered, and the stability of the equipment is enhanced. At the same time, the use of a precise power transmission system (reducer 38 and transmission motor 37) ensures the stability of the material during the calendering process, so that the quality of the product is effectively guaranteed.

[0050] Temperature control system ensures material quality The addition of the water circulation cooler 314 can effectively control the temperature of the calender rollers to prevent the material from being deformed or unevenly processed due to excessive temperature. This temperature control system ensures the consistency and stability of the material throughout the entire processing process, which helps to improve the quality of the final product.

[0051] The equipment is easy to maintain and adjust The travel assembly 312 and the lifting screw 313 make the equipment more flexible during operation and maintenance. The equipment can be adjusted in position and height as needed, ensuring that the operator can conveniently perform maintenance or modify working parameters.

[0052] according to Figure 11-13 An embodiment provided This part integrates the three functions of drying, pulling and cutting into one frame. The complex design that originally required multiple separate structures and connectors now integrates the various functions through an integrated frame. By integrating all key components (such as heating boxes, pulling rollers, cutting knives, etc.) into one frame, the interconnection and coordination problems between multiple separate structures are reduced, thus avoiding structural complexity and unnecessary installation adjustments.

[0053] By placing the upper heating box 42 and the lower heating box 46 on an integrated frame, multiple separate heating systems are eliminated, reducing the complexity of the installation process. A heating pipe 47 is installed in the lower heating box to effectively regulate temperature and distribute heat. The combined design of the upper heating box 42 and the lower heating box 46 makes the heating system more compact and avoids the coordination and connection problems of multiple independent heating components in traditional designs.

[0054] The traction and cutting functions are integrated into one frame, avoiding the trouble of adjusting the traction system and the cutting system separately in the traditional design. Sliding bearings 49 are installed on both sides of the traction rubber roller 411, and the position of the traction rubber roller is supported and adjusted by the slide seat 410, making the adjustment of the traction rubber roller more convenient and quick. At the same time, the traction machine transmission shaft 412 is connected with the chain 425 to form a unified motion working system, avoiding the complexity of each component being driven independently.

[0055] The cutting platform 413 and the lower scissors 420 are integrated in the integral frame, avoiding the installation and adjustment problems of the split cutting device in the traditional design. The power is transmitted through the transmission shaft 419 and the eccentric wheel 416, making the operation of the cutting tool more precise and reducing the deviation and instability in the split design.

[0056] The design of the clamping cylinder 48 and the cylinder bracket 44 enables the traction roller system to be easily clamped and loosened, ensuring close contact between the traction rubber roller and the material without multiple manual adjustments. This centralized control reduces the tediousness of the operator needing to make multiple adjustments during the installation process.

[0057] By connecting with the movable hinge seat 45, the opening cylinder makes the upper heating box 2 easy to open, which is convenient for cleaning, maintenance and adjustment. In this way, it is no longer necessary to handle multiple split heating devices during installation, reducing the time and complexity required during installation.

[0058] The design of the sliding bearing 49 and the sliding seat 410 enables the traction roller to be adjusted more smoothly and conveniently during the installation process, ensuring the smooth operation of the equipment during operation and reducing the adjustment error in the split design.

[0059] The integrated frame 41 is a core component, and all functional components are integrated into one frame, which reduces the use of materials and repeated processes in the manufacturing process, and reduces the production cost. At the same time, since only one overall frame needs to be produced, the production cycle and cost are relatively low.

[0060] The traction machine drive shaft 412 and the chain 425 are connected to the motor reducer 421, and the entire traction system is driven uniformly, avoiding the complexity of each independent function in the traditional design that needs to be driven separately. This design simplifies the power transmission structure, reduces unnecessary components, improves transmission efficiency, and reduces the probability of failure, thereby reducing maintenance and operation costs.

[0061] The design of the travel wheel assembly 423 allows the entire device to be easily moved forward and backward. This design significantly improves the flexibility of the device, especially when the installation site is small or the position needs to be adjusted.

[0062] Since the design integrates all components into the integrated frame 41, the parts that need to be linked and connected between multiple separate components in the traditional design are reduced, and possible looseness and instability factors are eliminated. The traction drive reduction motor 427 drives the traction roller, and the transmission motor 421 drives the cutting system to move in a unified operation. The design makes the equipment run more stable and smooth.

[0063] The precision design of the eccentric wheel 416 and the bearing 417 ensures the accurate cutting of the upper scissors 426, avoiding the problems of inaccurate cutting tools and uneven cutting that may occur in traditional designs. The power transmission of the transmission shaft 419 and the support of the support bearing 422 ensure stability during the cutting process.

[0064] The design of the movable hinge seat 45 and the opening cylinder 43 facilitates regular inspection and maintenance of the upper heating box. The upper heating box 42 can be opened by simple cylinder operation without disassembling multiple parts, which is convenient for daily maintenance and cleaning.

[0065] The design of the cutting platform 413 and the lower scissors 420 makes it easier to adjust or replace the upper scissors 426 in the scissor frame 415. With the support of the slide rail 414, the adjustment and replacement of the scissor assembly become faster and more convenient.

[0066] The design of this PET sheet production line has many advantages, first of all, it is outstanding in automation and integrated control. The entire production process, from feeding, drying, preheating, extrusion, calendering to finished product rolling, is controlled by an automated system. The operator only needs to set various parameters such as temperature and speed, and the system will automatically adjust the working state of the equipment, greatly reducing the need for manual intervention, ensuring the smooth connection of each link and improving production efficiency.

[0067] Secondly, precise temperature control is a major feature of this production line. Each link, including the drying tank, main machine, mold and mold temperature controller, is set with preheating temperature, and the water circulation system is used to ensure stable temperature control. This design avoids material processing problems caused by temperature fluctuations, thereby improving the processing performance of the material and the quality of the final product. Especially in the three-roll calender, the precisely controlled temperature and pressure ensure the uniformity of the sheet thickness and avoid the problem of uneven material.

[0068] The continuous design of the production line also brings significant advantages. With the dual-station design of the drying tank, when one drying tank is working, the other can be loaded or unloaded, avoiding the time waste of traditional drying equipment stopping for cleaning. This allows the production line to operate continuously, greatly improving the continuity and efficiency of production. In addition, the automated design reduces waiting and pauses between each device, ensuring a smooth production process.

[0069] In terms of saving space and energy, this production line adopts an integrated design, integrating equipment from multiple production links, significantly reducing the required floor space. At the same time, the design of the temperature control system, water circulation system and cooling bracket maximizes energy efficiency and avoids unnecessary energy waste. This not only reduces production costs, but also reduces redundancy and complexity between equipment.

[0070] In addition, efficient production scheduling and flexibility are also a major advantage of the present invention. The entire system allows the operator to adjust the speed of the host and equipment according to production needs to adapt to the production requirements of different batches or specifications. By monitoring the production status in real time, the system can automatically optimize the operating status of the equipment to ensure that production is always in the best state of high efficiency and low energy consumption.

[0071] By reducing operating errors and improving work safety, automated control systems greatly reduce the risk of human error. Every link is monitored by the system, and potential problems can be discovered and adjusted in time, thereby improving production safety. Automated production also avoids frequent start and stop of equipment, reducing failures and safety hazards.

[0072] In summary, the PET sheet production line not only improves production efficiency but also ensures the consistency and stability of product quality through a series of designs such as integrated automatic control, fine temperature control, continuous production, energy saving and space optimization. At the same time, it saves production costs, optimizes the operation process, and improves the safety and flexibility of the production line. It is an advanced and efficient production solution.

[0073] Those skilled in the art should understand that the various embodiments disclosed above can be changed and modified in various ways without departing from the essence of the invention. Therefore, the protection scope of the present invention should be defined by the appended claims.

[0074] It should be noted that not all steps and units in the above processes are necessary, and some steps or units can be ignored according to actual needs. The execution order of each step is not fixed and can be determined as needed. The device structure described in the above embodiments can be a physical structure or a logical structure, that is, some units may be implemented by the same physical entity, or some units may be implemented by multiple physical entities, or some components in multiple independent devices may be implemented together.

[0075] The specific embodiments set forth above describe exemplary embodiments, but do not represent all embodiments that may be implemented or fall within the scope of protection of the claims. The term "exemplary" used throughout this specification means "used as an example, instance, or illustration" and does not mean "preferred" or "having advantages" over other embodiments. For the purpose of providing an understanding of the described techniques, the specific embodiments include specific details. However, these techniques may be implemented without these specific details. In some instances, in order to avoid obscuring the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0076] The above description of the present disclosure is provided to enable any person of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is consistent with the widest range of principles and novel features disclosed herein.

Claims

1. A PET sheet production line, comprising a pre-crystallization drying tank (1), an integrated co-extrusion plastic extruder (2), a three-roll calender (3), a drying, traction and cutting integrated machine (4), a double-station winder (5), and a material box (101), characterized in that: A material box (101) is arranged below the pre-crystallization drying tank (1), and another material box (101) is arranged on one side of the pre-crystallization drying tank (1). The material box (101) is connected to a hopper (25) arranged on an integrated co-extrusion plastic extruder (2) through a spiral upper barrel (102). The integrated co-extrusion plastic extruder (2) is connected to a three-roll calender (3) through a screen changer (103), a melt pump (104), and a supply composite mold (105). The three-roll calender (3) is connected to a drying, traction and cutting integrated machine (4) through a cooling and shaping frame (106). A trimming device (107) is arranged on the cooling and shaping frame (106). A trimming device (108) and an oiling device (109) are arranged below the drying, traction and cutting integrated machine (4).

2. A PET sheet production line according to claim 1, characterized in that: The pre-crystallization drying tank (1) further comprises a support (11), a frame (12) is arranged above the support (11), two drying tanks (13) are installed above the frame (12), a hot air duct (19) is installed on one side of the two drying tanks (13), a hot air blower (15) is installed at the top of the hot air duct (19), the hot air blower (15) is connected to a heating pipe (110) and is installed inside the hot air duct (19), the hot air duct (19) is connected to a distributor (112), a pulley (16) is arranged above the drying tank (13), the pulley (16) is connected to a motor (14), a spiral feeding shaft (18) is connected below the pulley (16), a feeding cylinder (17) is installed outside the spiral feeding shaft (18), and a discharge cylinder (111) is arranged below the drying tank (13).

3. A PET sheet production line according to claim 1, characterized in that: The integrated co-extrusion plastic extruder (2) further comprises a combined frame (21), a covering main machine (212) and an inner main machine (213) are arranged above the combined frame (21), a cooling fan (23) is arranged below the covering main machine (212) and the inner main machine (213), a first reducer (210) is connected to the rear of the covering main machine (212), a second reducer (211) is connected to the rear of the inner main machine (213), the first reducer (210) and the second reducer (211) are respectively connected to a V-belt pulley (27), the outer layers of the two V-belt pulleys (27) are provided with V-belts (28), and the pulleys below the two V-belt pulleys (27) are respectively A V-belt drive motor (29) is connected; the outer layers of the covering main machine (212) and the inner layer main machine (213) are provided with a heat preservation cover (24); a heating ring (26) is provided inside the heat preservation cover (24); a screw barrel (214) and a screw rod (215) are provided inside the covering main machine (212) and the inner layer main machine (213); the screw barrel (214) and the screw rod (215) are installed inside the heat preservation cover (24) and the heating ring (26); a hopper (25) is installed on the upper side of the ends of the covering main machine (212) and the inner layer main machine (213); a power distribution cabinet (22) is installed on the side of the combined frame (21); and the screw rod (215) is installed inside the screw barrel (214).

4. A PET sheet production line according to claim 1, characterized in that: The three-roll calender (3) comprises a frame (31), the inclined angle of the frame (31) can be 45°, 90°, or 180°, the frame (31) is equipped with two movable calender rollers (33), a fixed calender roller (34) is arranged between the two movable calender rollers (33), a bearing (36) is connected to one side of the movable calender roller (33) and the fixed calender roller (34), the bearing (36) is installed on a bearing seat (35), a bearing cover (39) is installed on the outer side of the bearing (36), a reducer (38) is connected to the other side of the movable calender roller (33) and the fixed calender roller (34), the reducer (38) is connected to a transmission motor (37), lifts (310) are installed on both sides of the bottom of the frame (31), one side of the lift (310) is connected to a lift motor (315), and a synchronous shaft is connected between the two lifts (310). (311), a walking assembly (312) is installed at the bottom of the frame (31), a lifting screw (313) is arranged above the walking assembly (312), lifts (310) are installed on both sides above the frame (31) and one side is connected to a lifting motor (315), a manual adjustment hand wheel (316) is arranged on the lift (310) on one side above the frame (31), the lift (310) is connected to push a mobile calendering roller (33), a water circulation cooler (314) is installed on one side of the frame (31), the water circulation cooler (314) is connected to the mobile calendering roller (33) and the fixed calendering roller (34), a power distribution cabinet (32) is installed on one side of the frame (31), and the power distribution cabinet (32) is connected to the transmission motor (37), the lift (310), the water circulation cooler (314), and the lifting motor (315).

5. The PET sheet production line according to claim 1, characterized in that: The drying, traction and cutting integrated machine (4) further comprises an integrated frame (41), a lower heating box (46) is installed above the integrated frame (41), a heating tube (47) is installed in the lower heating box (46), an upper heating box (42) is installed above the lower heating box (46), two traction rubber rollers (411) are installed on the sides of the lower heating box (46), sliding bearings (49) are connected to the two sides of the traction rubber rollers (411), and the sliding bearings (49) are installed on the slide seat (410). ), a pressing cylinder (48) is installed above the slide seat (410), a traction machine transmission shaft (412) is connected to one side of the traction rubber roller (411), a chain (425) is sleeved on the traction machine transmission shaft (412), the chain (425) is connected to a traction transmission reduction motor (427), a cutting platform (413) is installed on one side of the traction rubber roller (411), a transmission shaft (419) is installed below the cutting platform (413), and a transmission shaft (419) is installed behind the transmission shaft (419) A transmission motor (421) is provided, support bearings (422) are connected to both sides of the transmission shaft (419), and a transmission sprocket (418) is connected to the other side of the transmission shaft (419), eccentric wheels (416) are connected to both sides of the transmission shaft (419), bearings (417) are installed in the eccentric wheels (416), a scissor frame (415) is connected above the eccentric wheel (416), an upper scissor (426) is installed in the scissor frame (415), and slide rails (414) are installed on both sides of the scissor frame (415). ), a movable hinge seat (45) is installed on the outer side of the upper heating box (42), the movable hinge seat (45) is connected to an opening cylinder (43), the opening cylinder (43) is installed on the integrated frame (41) through a cylinder bracket (44), the cutting platform (413) is installed with a lower scissors (420) located below the upper scissors (426), a control cabinet (424) is installed on one side of the integrated frame (41), and a walking wheel assembly (423) is installed below the integrated frame (41).

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