Film spraying production line and film spraying process

Abstract

The invention provides a lamination production line. The lamination production line comprises an unwinding mechanism, an extrusion mechanism, a compounding mechanism and a central winding mechanism. Wherein the unwinding mechanism is used for continuously unwinding a base material; the three extrusion mechanisms are arranged along the unwinding direction of the base material and are used for extruding the same or different plastics; the composite mechanism is provided with three composites, is arranged opposite to the extruder and is used for pressing the base material and the extruded melt film; the center winding mechanism is symmetrically provided with double-station winding pieces along the center position, and continuous winding is carried out. The invention also discloses a lamination process, which comprises the following steps of: unreeling a base material, rectifying, polarizing, extruding and compounding, polarizing, extruding and compounding, overturning, polarizing, extruding and compounding, trimming, measuring the thickness, detecting flaws, polarizing and reeling. According to the continuous winding device, the requirement for continuous winding of the thin film larger than 150 gsm is met, and meanwhile, different materials can be selected for different base materials to conduct film spraying so as to produce thin films with different properties; and continuous unwinding can be achieved, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of material forming, and more specifically, relates to a laminating production line and a laminating process. Background Art

[0002] The field of material forming technology is a comprehensive field that integrates material science, mechanical engineering and control technology, aiming to transform raw materials into products or parts with specific shapes, sizes and performance. In this field, laminating technology is often used in film production workshops as an important forming technology. Among them, laminating, also known as extrusion lamination or coating, is a widely used and economical way to laminate films. It is a method of melting thermoplastics such as polyethylene in an extrusion laminating machine, flowing out of a flat die in the form of a film, pressing it against the substrate between two closely contacting rollers and cooling it to form a composite film. Extrusion lamination has the advantages of low cost, clean production environment, high production efficiency, simple operation, no solvent residue, no diaminotoluene (carcinogen) residue, etc., and occupies an important position in the composite processing of plastic packaging. It is the most widely used lamination method in Europe, America, Japan and other countries. Especially in recent years, with the development and use of various thermal bonding resins, such as EAA (ethylene acrylic acid copolymer), EMAA (ethylene-methacrylic acid copolymer), EEA (ethylene-vinyl acetate-ethyl acrylate copolymer), ion polymers and various acid bonding copolymers, the peel strength of extrusion composite products has reached and exceeded that of dry lamination, making extrusion composite products develop from simple food packaging to high-end packaging market of daily chemical products (such as hoses, toothpaste, Tetra Pak, etc.), and has become an important direction for the future development of packaging.

[0003] In the process of laminating, laminating or coating equipment is needed, that is, a whole laminating or coating production line is needed to complete the laminating process. The laminating production line is mainly composed of unwinding components, laminating components, composite mechanisms, winding components, etc.

[0004] The winding device in the existing film production line is usually equipped with a winding shaft (generally referred to as the winding shaft here), which is driven by the driving force to rotate the winding shaft to reel the film. The extrusion composite production line is affected by the thickness, width, material and other factors of the substrate during the reeling process, and the requirements for the winding device are higher. In particular, when reeling thick paper substrates (films greater than 150gsm), greater tension is required to maintain stability and the flatness of the reeling surface, and friction reeling is usually used. However, friction reeling has a greater impact on the product surface. When the product needs further processing in the subsequent process, it is difficult to obtain a better surface effect. When the existing film production line is running, it is necessary to replace the reel of different specifications at any time to meet different substrates, especially for substrates greater than 150gsm. In addition, since the extrusion temperature of the extruder in the extrusion composite production line needs to reach above 300℃, which is close to the decomposition temperature of the extruded material, the production line cannot be stopped and can only be produced continuously. The existing film production line needs to be stopped to replace the reel when replacing it, which greatly wastes raw materials and therefore cannot meet the actual production needs. Summary of the invention

[0005] The main purpose of the present application is to provide a laminating production line and a laminating process, which can meet the demand for continuous winding of films greater than 150gsm, and can select different materials for laminating for different substrates to produce films with different properties.

[0006] In order to achieve the above objectives, the present application proposes a laminating production line, comprising: An unwinding mechanism, used for continuously unwinding the substrate; An extrusion mechanism, three of which are provided along the substrate unwinding direction and are used to extrude the same or different types of plastics; A compounding mechanism, which is provided with three units and is arranged opposite to the extrusion mechanism, and is used for pressing the substrate and the extruded film; The central winding mechanism has double-station winding parts symmetrically arranged along the center position. When the winding part at the first station completes winding the substrate, the central winding mechanism rotates clockwise or counterclockwise to make the substrate contact with the winding part at the second station for continuous winding.

[0007] Furthermore, the composite structure comprises: The silicone roller, also known as the composite pressing roller, can be opened or pressed to the cooling roller by air pressure or oil pressure to provide pressing force for the composite of the extruded film and the substrate; The cooling roller is placed under the extrusion mechanism. It is an active roller or a power roller and can rotate counterclockwise in the direction of substrate transmission to drive the composite material after the substrate and the extruded film are compounded. A peeling roller is placed above the cooling roller and is mainly used to peel the composite film composed of the substrate / extruded film from the cooling roller; During normal operation, the extrusion die head of the extrusion mechanism is located above the composite mechanism, and the composite mechanism presses the substrate and the extruded film to form a composite film.

[0008] Furthermore, the extrusion mechanism is provided with a T-shaped die head, and the extrusion mechanism also has a walking device. When the production line is working, the extrusion mechanism can move forward so that the die head is located above the composite mechanism; after the production line stops working, the extrusion mechanism retreats so that the die head leaves the composite mechanism.

[0009] Furthermore, the central winding mechanism further comprises: A shell, wherein a disc is provided at the center of the shell and can rotate relative to the shell, the double-station winding member is mounted on the disc, and the first-station winding member and the second-station winding member can both rotate relatively to wind up the composite film; A cutting assembly is mounted at one end of the shell and is used for cutting the composite film; The unloading assembly is arranged on the shell. When any one of the winding member at the first station and the winding member at the second station is unloaded, the unloading assembly can lean against the winding member at the corresponding station and lift it until the winding member is unloaded from the disc.

[0010] Furthermore, the first station winding component structure is the same as the second station winding component structure, and the first station winding component includes: A rotating shaft, one end of which is connected to a first driving motor A and rotates under the drive of the first driving motor A, a disc is passed through the other end of the rotating shaft, a pneumatic clamping mechanism is provided on the outer side of the disc, and the rotating shaft is mounted on the pneumatic clamping mechanism and can rotate relative to the pneumatic clamping mechanism; The pneumatic shaft is connected to the rotating shaft by a pneumatic clamping mechanism. When the pneumatic clamping mechanism disconnects the pneumatic shaft from the rotating shaft, the pneumatic shaft can be unloaded by the unloading device. The paper tube is sleeved on the inflatable shaft. The inflatable shaft is provided with a plurality of airbags and key positions. The airbags are connected to the inflation port of the inflatable shaft. When the inflation port inflates the airbags, the airbags lift the key positions and fix them to the paper tube. The paper tube is used for winding the composite film.

[0011] Furthermore, the coating production line also includes: Polarization treatment machines, three or more of which are arranged along the substrate unwinding direction, wherein the substrate is guided by guide rollers to enter from the input end of the polarization treatment mechanism and is led out from the output end of the polarization treatment mechanism; The winding piece plug-in and pull-out assembly is arranged at the end of the central winding mechanism. The winding piece plug-in and pull-out assembly can move horizontally and vertically, and lift the first-station winding piece or the second-station winding piece to a position away from the central winding mechanism.

[0012] Another object of the present application is to provide a coating process that can continuously unwind and improve production efficiency.

[0013] In order to achieve the above purpose, the present application proposes a coating process, using the above coating production line, the steps of which include: Step 1: First, the substrate is unwound by the unwinding mechanism, and the substrate is treated by the polarization treatment machine after passing through the correction mechanism to improve the hydrophilicity and adhesion of the substrate surface; Step 2: The substrate then enters the composite mechanism, and the melt film extruded by the No. 1 extrusion mechanism adheres to the substrate under the action of the composite mechanism to form a composite film with a substrate / extruded film structure. Then, one side of the extruded film is polarized to improve the adhesion of the composite film surface; Step 3: Then, polarizing one side of the extruded film of the composite film of the substrate / extruded film one structure is performed, and then the substrate / extruded film one enters the second composite mechanism, the second extrusion mechanism extrudes the molten film, and the composite mechanism composites the substrate / extruded film one with the extruded film two to form a composite film of substrate / extruded film one / extruded film two; Step 4: The composite film of substrate / extruded film 1 / extruded film 2 is flipped by a flipping mechanism, and the other side of the substrate is treated by a polarizing treatment machine after flipping, and then the melt film is extruded by the third extrusion mechanism, and the composite film of extruded film 3 / substrate / extruded film 1 / extruded film 2 is obtained under the action of the third composite mechanism, and then the composite film is trimmed under the action of a cutting knife; Step 5: The composite film after trimming is measured for thickness and inspected for defects using a thickness gauge and a defect detector, and the surface of the composite film is subjected to a final polarization treatment after the inspection; Step 6: The composite film subjected to the last polarization treatment is rolled up using a central rolling mechanism.

[0014] The coating production line proposed by the present invention has the following beneficial effects: The coating production line is designed with a central winding mechanism and a double-station winding piece symmetrically arranged along the center position, so that after the winding piece at the first station completes winding, the central winding mechanism can rotate clockwise or counterclockwise to make the composite film contact with the winding piece at the second station for continuous winding. This design significantly enhances the winding capacity of the production line, enabling it to meet the demand for continuous winding of films greater than 150gsm, and solves the problem of insufficient driving force of the winding components of the existing coating production line. At the same time, the coating production line is also equipped with three extrusion mechanisms arranged along the unwinding direction of the substrate, and at least three composite mechanisms arranged opposite to the extrusion mechanisms. This configuration enables the production line to select different materials for coating for different substrates to produce films with different properties. In addition, this production line adopts a central winding mechanism, and the winding shaft can be replaced without stopping the machine to meet the needs of actual production.

[0015] The coating process proposed by the present invention has the following beneficial effects: The process first unwinds the substrate continuously through an unwinding mechanism, and uses a correction mechanism and a polarization treatment machine to improve the hydrophilicity and adhesion of the substrate surface, thereby providing basic conditions for substrate lamination. Subsequently, three extrusion mechanisms and three lamination mechanisms are used to perform multiple extrusion laminations on the A and B sides of the substrate, which not only improves production efficiency but also ensures the uniformity and adhesion of the extruded film. Polarization treatment is performed before each extrusion lamination to enhance the adhesion of the material. In addition, the process also includes key steps such as trimming, thickness measurement, and defect detection to ensure the dimensional accuracy and quality of the final product. Finally, continuous winding is performed through the central winding mechanism, which not only improves production efficiency but also avoids the problem of low production efficiency caused by the inability to unwind continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a coating production line of the present invention; Figure 2 It is a structural schematic diagram of the B-side assembly of the present invention; Figure 3 for Figure 2 Position relationship diagram of the tension roller and the bow roller; Figure 4 for Figure 1 A schematic diagram of the structure of the middle winding piece plug-in and pull-out assembly; Figure 5 for Figure 4 Schematic diagram of the side structure.

[0017] In the figure, 1. frame A, 2. unwinding mechanism, 3. extrusion mechanism, 4. compounding mechanism, 41. A surface assembly, 42. B surface assembly, 421. B surface silicone roller, 422. B surface peeling roller, 423. B surface back roller, 424. bow roller, 425. tension roller, 426. B surface cooling roller, 5. polarization processor, 6. winding piece plug-in assembly, 61. frame B, 62. first driving member, 63. shaft holding hook, 631. bayonet A, 64. holder, 641. bayonet B, 65. linear guide rail, 66. second driving member, 661. mounting plate A, 662. first driving motor B, 67. core-pulling slide seat cover, 68. second driving motor, 69. sliding seat, 691. screw, 692. mounting seat, 9. defect detector. DETAILED DESCRIPTION

[0018] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0019] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0020] Example This application proposes a coating production line, referring to Figure 1 On the whole production line, a frame A1 is set up from the left end to the right end in the figure, and the unwinding mechanism 2, the extrusion mechanism 3, the compounding mechanism 4 and the central winding mechanism are sequentially set up on the frame A1. Among them, the unwinding mechanism 2 is a zero-speed unwinding machine, which is used to continuously unwind the substrate.

[0021] The extrusion mechanism 3 is provided with three units along the substrate unwinding direction, namely, extruder No. 1, extruder No. 2, and extruder No. 3, for extruding the same or different types of plastics. The compounding mechanism 4 is mounted on the frame A1 through a rotating shaft, and is provided with three units and arranged opposite to the extrusion mechanism 3, for compounding the substrate and the extruded film, wherein the compounding mechanism 4 includes an A-surface component 41 and a B-surface component 42. The central winding mechanism is symmetrically provided with double-station winding pieces along the center position. When the first-station winding piece has finished winding the composite film, the central winding mechanism rotates clockwise or counterclockwise to make the composite film contact with the second-station winding piece for continuous winding.

[0022] The coating production line of the present application cleverly designs a central winding mechanism, and symmetrically deploys a double-station winding piece at its center. This innovative design allows the central winding mechanism to flexibly rotate clockwise or counterclockwise after the winding piece at the first station completes the winding task, so that the composite film can be seamlessly docked to the winding piece at the second station, thereby achieving uninterrupted continuous winding. This breakthrough significantly improves the winding efficiency of the production line, enabling it to easily cope with the continuous winding requirements of films greater than 150gsm, effectively solving the bottleneck problem of insufficient driving force of the winding component of the existing coating production line without damaging the surface of the extruded film. In addition, the production line is also equipped with three extrusion mechanisms 3 carefully arranged along the unwinding direction of the substrate, and at least three composite mechanisms 4 corresponding to the extrusion mechanisms 3. These composite mechanisms 4 are composed of A-surface components 41 and B-surface components 42, which can press the substrate and the extruded film together well. The production line configured in this way can flexibly select different materials for coating treatment for different substrates, meet the specific needs of three-layer coating of the substrate, and greatly enhance the flexibility and application range of the production line.

[0023] In this embodiment, the A-side component 41 includes: an A-side silicone roller, an A-side cooling roller, and an A-side peeling roller. The A-side silicone roller can be pressed against the A-side cooling roller under the push of air pressure or oil pressure, thereby pressing the substrate and the extruded melt film together. The A-side cooling roller is equipped with a power device that can pull the composite film to move. The composite film is coated on the surface of the cooling roller and is guided out at the position of the peeling roller. When any extrusion mechanism 3 (extruder) is working, it travels to the top of the composite mechanism via a carrier. The melt flows out through the T-die to form an extruded film, which is compounded with the substrate entering the composite device to form a composite film of a substrate / extruded film structure. Figure 2 As shown, the B-side assembly 42 includes: a B-side silicone roller 421, a B-side cooling roller 426, and a B-side peeling roller 422. The B-side assembly 42 has the same structure as the A-side assembly 41, but is a mirror image of each other.

[0024] In order to fully illustrate the transfer process of the substrate, in the above embodiment, Figure 2-3As shown, the B-side assembly 42 and the B-side back roller 423 constitute a complete system. The B-side silicone roller 421 is placed in the tangential direction of the B-side cooling roller 426 and rotates in opposite directions, and a composite area B is formed between the B-side silicone roller 421 and the B-side cooling roller 426. The B-side peeling roller 422 is placed in the tangential direction of the B-side cooling roller 426 and is arranged opposite to the B-side silicone roller 421. The B-side back roller 423 is placed in the tangential direction of the B-side silicone roller 421 and is consistent with the rotation direction of the B-side cooling roller 426. The design of the B-side silicone roller 421 and the B-side cooling roller 426 rotating in opposite directions, and the composite area B formed therebetween, provide a more accurate and efficient platform for the extrusion film operation of the extrusion mechanism 3. This design not only improves the uniformity and quality of the extruded film, but also optimizes the overall efficiency of the production line. In addition, the introduction of the B-side peeling roller 422 enables the substrate to be smoothly peeled off from the B-side peeling roller 422 after the composite is completed, avoiding adhesion and damage, and further improving the quality of the film. At the same time, the ingenious setting of the B-side back roller 423 not only keeps the rotation direction consistent with the B-side cooling roller 426, but also keeps the B-side silicone roller 421 at a relatively constant temperature, thereby extending its service life and the smooth operation of the production line.

[0025] It should be noted that the B-side silicone roller 421 and the B-side cooling roller 426 are sequentially suspended on the frame A1 and can rotate relative to each other. Figure 3 , the production line of the present application also includes: a bow roller 424 near one end of the B-side peeling roller 422, and a tension roller 425 near one end of the B-side silicone roller 421. The substrate passes through the tension roller 425 to the B-side silicone roller 421, and then passes through the composite area B and is coated on the B-side cooling roller 426 to the B-side peeling roller 422. By integrating the frame A1 and a series of precisely designed B-side transfer components, the coating process is unprecedentedly efficient and stable. The frame A1, as a supporting structure, stably carries the B-side silicone roller 421 and the B-side cooling roller 426, so that they can be suspended in sequence and rotate relative to each other, which not only ensures the compactness of the production line structure and stable operation, but also facilitates maintenance and adjustment. The clever use of the bow roller 424 and the tension roller 425 further improves the precision of the coating process. The bow roller 424 is close to one end of the B-side peeling roller 422, and its unique shape design helps the film to transition smoothly during the transfer process, reducing possible wrinkles and deviations. The tension roller 425 is close to one end of the B-side silicone roller 421. By precisely controlling the tension of the substrate, the stability and consistency of the substrate before entering the composite area B are ensured, which is crucial to improving the composite quality and film quality. The substrate passes through the tension roller 425 to the B-side silicone roller 421, and then passes through the composite area B to be coated on the B-side cooling roller 426 to the B-side peeling roller 422. This not only optimizes the cooling effect, but also ensures the continuity and stability of the substrate during the B-side processing process. This design not only improves production efficiency, but also significantly enhances the physical properties and appearance quality of the film.

[0026] In this embodiment, reference Figure 1 , Figure 4 , Figure 5 , the coating production line also includes: a polarization treatment machine 5, a winding piece plug-in assembly 6. Three polarization treatment machines 5 are arranged along the unwinding direction of the substrate. The substrate enters from the input end of the polarization treatment machine 5 through the guide roller and is led out from the output end of the polarization treatment machine 5. The winding piece plug-in assembly 6 is arranged at the end of the central winding mechanism. The winding piece plug-in assembly 6 can move horizontally and vertically, and lift the first-station winding piece or the second-station winding piece to a position away from the central winding mechanism. By adding the polarization treatment machine 5 and the winding piece plug-in assembly 6, the performance and automation level of the production line are further improved, providing a strong guarantee for the efficient and stable production of the coating process. The setting of the polarization treatment machine 5 is a highlight in the coating production line. Three polarization treatment machines 5 are arranged along the unwinding direction of the substrate, ensuring that the substrate can be fully surface pre-treated before entering the composite device. The substrate is guided by the guide roller and enters from the input end of the polarization treatment machine 5, and is led out from the output end after being processed. This process not only improves the surface energy of the substrate, but also enhances the adhesion between the extruded melt film and the substrate, laying a solid foundation for the production of high-quality and high-performance film products. The introduction of the winding piece plug-in and unplug assembly 6 further improves the automation level of the production line. This component is arranged at the end of the central winding mechanism, and can move horizontally and vertically, and lift the first-station winding piece or the second-station winding piece and transfer it to a position away from the central winding mechanism. This design not only simplifies the replacement process of the winding piece, reduces the difficulty of operation and labor intensity, but also improves the flexibility and continuity of the production line, ensuring the smooth progress of the coating process.

[0027] In order to further explain the process of center winding, it is necessary to introduce the structure of the center winding mechanism. In the present application, the center winding mechanism also includes: a shell, a cutting component, and an unloading component. Among them, a disc is provided at the center of the shell, and it can rotate relative to the shell, and a double-station winding piece is mounted on the disc, and the first station winding piece and the second station winding piece can rotate relative to each other to wind up the composite film. The cutting component is mounted at one end of the shell and is used to cut the composite film. The unloading component is arranged on the shell, and when any one of the first station winding piece and the second station winding piece is unloaded, the unloading component can abut against the winding piece of the corresponding station and lift it until the winding piece is unloaded from the disc. By optimizing the design of the center winding mechanism, its excellent performance in improving production efficiency, automation and convenience of operation is once again demonstrated. The shell design in the center winding mechanism is not only compact in structure, but also realizes efficient and continuous winding of the substrate through the disc and the relatively rotatable double-station winding piece (the first station winding piece and the second station winding piece). This design not only improves production efficiency, but also ensures the stability and reliability of the winding process. The clever installation of the cutting component enables the composite film to be accurately cut before changing the roll, avoiding material waste and product quality problems caused by improper cutting. This design not only improves the utilization rate of materials, but also ensures the dimensional accuracy and consistency of the final product. It is particularly worth mentioning that the introduction of the unloading component provides strong support for the automated operation of the laminating production line. When either the first-station winding piece or the second-station winding piece needs to be unloaded, the unloading component can quickly abut against the winding piece at the corresponding station and lift it until the winding piece is unloaded from the disc. This design not only simplifies the unloading process and reduces the difficulty of operation, but also improves the flexibility and adaptability of the production line, setting a new benchmark for automated production in the laminating industry.

[0028] In order to fully explain the cutting process of the cutting assembly, it is necessary to introduce the structure of the cutting assembly. The cutting assembly in the present application mainly controls the swing arm to swing upward or downward through a motor. A cutting knife is installed on the swing arm to cut the film from top to bottom or from bottom to top.

[0029] In some embodiments, the winding structure of the first station is the same as that of the winding structure of the second station, and the winding structure of the first station includes: a rotating shaft, an inflatable shaft, and a paper tube. One end of the rotating shaft is connected to the first drive motor A and rotates under the drive of the first drive motor A. A disc is passed through the other end of the rotating shaft, and a pneumatic clamping mechanism is provided on the outer side of the disc. The rotating shaft is mounted on the pneumatic clamping mechanism and can rotate relative to the pneumatic clamping mechanism. The inflatable shaft is connected to the rotating shaft through the pneumatic clamping mechanism. When the pneumatic clamping mechanism disconnects the connection between the inflatable shaft and the rotating shaft, the inflatable shaft can be unloaded by the unloading device. The paper tube is sleeved on the inflatable shaft, and a plurality of airbags and key positions are provided on the inflatable shaft. The airbag is connected to the inflation port of the inflatable shaft. When the inflation port inflates the airbag, the airbag lifts the key position and fixes it to the paper tube. The paper tube is used to wrap the composite film. By adopting the first-station winding parts and the second-station winding parts with the same structure, the standardization and modularization of the laminating process in the winding link are realized, which greatly improves the versatility and maintenance convenience of the production line. The design of the first-station winding parts fully demonstrates the technological innovation and practicality. The rotating shaft rotates under the drive of the first drive motor A, ensuring the stability and continuity of the winding process. The pneumatic clamping mechanism on the outside of the disc is not only compact in structure, but also can flexibly control the connection state of the air shaft and the rotating shaft, realize the rapid replacement and unloading of the winding parts, and improve the flexibility and efficiency of the production line. As the core component of the winding parts, the air shaft is connected to the rotating shaft through the pneumatic clamping mechanism. When the pneumatic clamping mechanism is disconnected, the air shaft can be easily unloaded by the unloading device. This design not only simplifies the steps of replacing the winding parts, but also reduces the difficulty and labor intensity of operation. The paper tube is set on the air shaft and fixed by the cooperation of the air bag and the key position. When the airbag is inflated from the air inlet, the airbag pushes up the key and fits tightly against the paper tube, thus ensuring the stability and reliability of the paper tube during the winding process. This design not only improves the winding quality, but also extends the service life of the paper tube and reduces production costs.

[0030] In the above implementation process, it is necessary to explain the unloading component in the present application, which can be: driving the unloading swing arm through a motor to lift the winding piece, and then using the motor to drive the unloading swing arm to gradually remove the lifted winding piece.

[0031] In addition, in the above implementation process, the winding piece plugging and unplugging assembly 6 includes: a frame B61, a transverse shift assembly, a longitudinal shift assembly and an axis holding assembly. Among them, the frame B61 is placed on the ground and is on the same horizontal plane as the central winding mechanism. The transverse shift assembly is arranged on the frame B61 and can move along the axis direction of the winding piece. The longitudinal shift assembly is mounted on the transverse shift assembly and can move along the axis direction perpendicular to the winding piece. The axis holding assembly is mounted on the longitudinal shift assembly and can rotate along the axis center of the winding piece and clamp and lift the winding piece.

[0032] Specifically, the transverse movement assembly includes: a linear guide rail 65 and a second driving member 66 mounted on the frame B61 along the direction of the winding member being withdrawn, wherein the second driving member 66 is mounted on the linear guide rail 65 and can slide along the linear guide rail 65, and the longitudinal movement assembly is fixedly connected to the second driving member 66. In some embodiments, the second driving member 66 includes: a mounting plate A661 mounted on the linear guide rail 65, a first driving motor B662 is fixedly connected to the mounting plate A661, a driving gear is fixedly connected to the output end of the first driving motor B662, a rack is mounted on the side end of the linear guide rail 65, and the driving gear and the rack are meshed with each other; when the first driving motor B662 drives the driving gear to rotate forward or reverse, the mounting plate A661 can approach or move away from the winding member. In this solution, the transverse movement assembly is composed of a linear guide rail 65 mounted on the frame B61 and a second driving member 66, wherein the second driving member 66 is mounted on the linear guide rail 65 and can slide along the linear guide rail 65. This design enables the longitudinal movement assembly to be fixedly connected to the second driving member 66 and to move transversely as the second driving member 66 moves on the linear guide rail 65. This design brings multiple advantages: First, the introduction of the transverse shift assembly enables the entire shaft holding assembly to move freely in the horizontal direction, thereby achieving precise positioning of the winding piece. Whether it is moving the winding piece from one end of the production line to the other end, or switching between different winding stations, the transverse shift assembly can provide stable and reliable support. Secondly, the combination of the linear guide rail 65 and the second drive member 66 ensures the smoothness and accuracy of the transverse shift process. The guiding effect of the linear guide rail 65 enables the second drive member 66 to maintain a stable trajectory during the sliding process, avoiding operational errors caused by offset or shaking. At the same time, the precise control of the second drive member 66 enables the transverse speed and position to be accurately adjusted to meet different operational requirements. In addition, the design of the transverse shift assembly also improves the flexibility and adaptability of the equipment. By adjusting the sliding distance and speed of the second drive member 66, it can easily adapt to winding pieces of different sizes and weights, as well as different production line layouts and process requirements. In summary, the innovative design of the transverse shift assembly not only improves the operational flexibility and positioning accuracy of the equipment, but also enhances the adaptability and stability of the equipment, providing a more comprehensive and efficient solution for the automation and intelligence of the film winding operation. The second drive member 66 is composed of a mounting plate A661 mounted on the linear guide rail 65, a first drive motor B662 fixedly connected to the mounting plate A661, and a drive gear fixedly connected to the output end of the first drive motor B662, and the side end of the linear guide rail 65 is equipped with a rack that meshes with the drive gear. This ingenious design enables the mounting plate A661 to smoothly approach or move away from the winding member along the linear guide rail 65 when the first drive motor B662 drives the drive gear to rotate forward or reverse. First, the precise movement of the second drive member 66 is achieved through the meshing of the drive gear and the rack. As a guide and transmission component for linear motion, the high precision and stability of the rack ensure the accurate position and smooth trajectory of the mounting plate A661 during movement. At the same time, the rotation of the driving gear is converted into the linear motion of the mounting plate A661 through the rack. This conversion process is efficient and reliable, avoiding the sliding friction and clearance problems that may exist in the traditional linear drive mechanism. Secondly, the application of the first drive motor B662 makes the moving speed and position control of the second drive member 66 more flexible and accurate. By adjusting the speed and direction of the motor, it is easy to achieve precise control of the moving speed and direction of the mounting plate A661, thereby meeting different operating requirements. In addition, the stability and durability of the motor also ensure the reliable operation of the second drive member 66 during long-term work. Furthermore, this design also improves the overall performance and efficiency of the equipment. Since the meshing of the driving gear and the rack has a self-locking function, when the motor stops working, the mounting plate A661 can be stably maintained in the current position, avoiding displacement or shaking caused by external interference. This not only enhances the stability of the equipment, but also reduces operational errors and safety hazards caused by position deviation.

[0033] Of course, the transverse shift assembly is not limited to the above structure, and the transverse shift assembly can also be composed of a motor, a reducer, a synchronous pulley and a synchronous belt. The motor drives one or more synchronous pulleys to rotate through the reducer, and the synchronous belt passes around the pulley and connects the moving parts. When the pulley rotates, the synchronous belt drives the moving parts to move linearly. This structure has the advantages of smooth transmission, low noise, high positioning accuracy, and the synchronous belt has a certain elasticity, which can absorb certain vibrations and shocks. The transverse shift assembly can also be composed of a motor, a reducer, a ball screw and a nut. The motor drives the ball screw to rotate through the reducer, and the balls on the ball screw roll in the nut, converting the rotational motion into linear motion, thereby driving the moving parts connected to the nut to move horizontally. This structure has the characteristics of high transmission accuracy, good rigidity, strong load capacity, and the ball screw has a self-locking function, which can prevent the moving parts from accidentally moving under power failure or external force.

[0034] In this solution, the longitudinal movement assembly includes a core-pulling slide cover plate 67 arranged on the transverse movement assembly. The core-pulling slide cover plate 67 can move toward or away from the winding piece with the transverse movement assembly. A second drive motor 68 is installed on the top of the core-pulling slide cover plate 67. The output end of the second drive motor 68 is fixedly connected to a screw 691. The screw 691 is vertically arranged on the transverse movement assembly. A sliding seat 69 is slidably connected to the screw 691. When the second drive motor 68 drives the screw 691 to rotate, the sliding seat 69 can move up or down along the screw 691. A mounting seat 692 is provided at one end of the sliding seat 69 facing the winding piece, and the shaft holding assembly is fixed on the mounting seat 692. In this solution, the design of the longitudinal movement assembly realizes the flexible movement of this product in the vertical direction, which significantly improves the operational flexibility and accuracy of the equipment. Specifically, the longitudinal movement assembly includes a core-pulling slide cover plate 67 arranged on the transverse movement assembly, and the cover plate can move with the movement of the transverse movement assembly, ensuring the synchronization and coordination between the longitudinal movement assembly and the transverse movement assembly. A second drive motor 68 is installed on the top of the core-pulling slide cover plate 67, which serves as a power source, and a screw 691 is fixedly connected to its output end. This design enables the screw 691 to be vertically arranged on the transverse movement assembly, providing a stable moving track for the sliding seat 69. When the second drive motor 68 drives the screw 691 to rotate, the sliding seat 69 can smoothly move up or down along the screw 691. This movement method is not only stable, but also accurate, and can meet the operation requirements of winding pieces of different heights. A mounting seat 692 is provided at one end of the sliding seat 69 facing the winding piece, and the shaft holding assembly is fixed on the mounting seat 692. This design enables the shaft holding assembly to adjust its position up and down with the movement of the sliding seat 69, thereby realizing accurate alignment and holding of the winding piece.

[0035] In the present invention, the shaft holding assembly includes: a first driving member 62 and a shaft holding hook head 63. One end of the first driving member 62 is fixed to the longitudinal movement assembly, and the other end of the first driving member 62 can extend outward. The shaft holding hook head 63 includes an integrally formed hook head, hook body, and hook tail. The hook head is provided with a bayonet A631, and the bayonet A631 can clamp the shaft body of the winding member. A hanging part is provided on the hook body at a position parallel to the axis of the winding member, and the hanging part is hinged to the longitudinal movement assembly. The hook tail is hinged to the extended end of the first driving member 62. When the extended end of the first driving member 62 pushes the hook tail, the hook body rotates along the hanging part, and the hook head gradually approaches the winding member until the winding member is clamped and lifted up. In this solution, the shaft holding assembly realizes efficient and stable holding and lifting of the winding member through the combination of the first driving member 62 and the shaft holding hook head 63. The first driving member 62 serves as a power source, and the hinged design of its extended end and the tail of the shaft-holding hook enables the shaft-holding hook head 63 to flexibly rotate along the hanging part under the push of the first driving member 62. The one-piece hook head, hook body, and hook tail structure of the shaft-holding hook head 63 not only enhance the overall strength and stability of the component, but also enable the hook head to accurately clamp the shaft body of the winding piece. In particular, the shape and size of the bayonet A631 set on the hook head have been carefully designed to fit tightly against the shaft body of the winding piece, ensuring that the winding piece will not slip or be damaged during the holding process. At the same time, the hanging part on the hook body parallel to the axis of the winding piece and the hinged design of the longitudinal shift assembly enable the shaft-holding hook head 63 to be flexibly adjusted in the vertical direction, further improving the accuracy and stability of the holding operation. In summary, the ingenious design of the shaft-holding assembly not only improves the holding efficiency of the winding piece, but also ensures the safety and stability of the operation, providing strong support for the automation and intelligence of the film winding operation.

[0036] In some embodiments, the present invention further comprises a holder 64, which is fixed on the longitudinal shift assembly and arranged adjacent to the shaft-holding hook 63. A bayonet B641 is arranged on the holder 64. When the winding piece is clamped and lifted by the hook, the bayonet B641 clamps the tail of the winding piece. At this time, the bayonet B641 is opposite to the bayonet direction of the bayonet A631. In this embodiment, the holder 64 is fixed on the longitudinal shift assembly and arranged adjacent to the shaft-holding hook 63, forming a stable support system. The bayonet B641 arranged on the holder 64 has a bayonet direction opposite to the bayonet A631 of the shaft-holding hook 63. This design enables the bayonet B641 to accurately clamp the tail of the winding piece when the winding piece is clamped and lifted by the hook of the shaft-holding hook 63, thereby realizing double fixation of the winding piece, that is, one force point is upward and the other force point is downward. This double fixing method not only enhances the stability of the winding piece during the holding process, but also further improves the safety of the operation. At the same time, the cooperation between the bayonet B641 and the bayonet A631 allows the winding piece to be evenly stressed during the holding process, thus avoiding deformation or damage of the winding piece due to uneven stress. In summary, the addition of the holder 64 not only improves the holding efficiency and stability of the winding piece, but also ensures the safety and reliability of the operation, providing a more solid foundation for the automation and intelligence of the film winding operation. Another object of the present application is to provide a coating process that can continuously unwind and improve production efficiency.

[0037] In the above embodiment, a T-die is provided on the extrusion mechanism, and the extrusion mechanism also has a walking device. When the production line is working, the extrusion mechanism can move forward so that the die is located above the composite mechanism; after the production line stops working, the extrusion mechanism retreats so that the die leaves the composite mechanism. The design significantly improves the overall performance of the production line by equipping the extrusion mechanism with a T-die and a walking device. During the operation of the production line, the extrusion mechanism can move forward autonomously to ensure that the T-die is accurately aligned with the composite mechanism. This function not only shortens the alignment time between the die and the composite mechanism, improves production efficiency, but also enhances the flexibility of the production line, enabling it to quickly adapt to different production needs. At the same time, when the production line stops working, the extrusion mechanism automatically retreats so that the die leaves the composite mechanism. This design not only avoids unnecessary contact between the die and the composite mechanism in the non-working state, reduces the risk of equipment damage, but also provides a larger safety space for operators, which is convenient for equipment maintenance, mold replacement or production line layout adjustment, and significantly improves the safety and convenience of operation. In addition, the walking function of the extrusion mechanism also optimizes the space utilization of the production site, simplifies the maintenance and maintenance process of the equipment, helps to extend the life of the equipment and maintain an efficient and stable production state, thereby achieving comprehensive optimization of production efficiency, operational safety, space utilization and maintenance management.

[0038] In order to achieve the above purpose, the present application proposes a coating process, using the above coating production line, the steps of which include: Step 1: First, the substrate is unwound by the unwinding mechanism, and the substrate is polarized by the polarization treatment machine after passing through the deviation correction mechanism to improve the hydrophilicity and adhesion of the substrate surface; Step 2: The substrate then enters the first composite mechanism, and the melt film extruded by the first extrusion mechanism is bonded to the substrate under the action of the first composite mechanism to form a composite film with a structure of substrate / extruded film; Step 3: Then, polarizing one side of the extruded film of the composite film of the substrate / extruded film one structure is performed, and then the substrate / extruded film one enters the second composite mechanism, the second extrusion mechanism extrudes the molten film, and the composite mechanism composites the substrate / extruded film one with the extruded film two to form a composite film of substrate / extruded film one / extruded film two; Step 4: The composite film of substrate / extruded film 1 / extruded film 2 is flipped by a flipping mechanism, and after flipping, the other side of the substrate is treated with a polarization processor, and then the melt film is extruded by the third extrusion mechanism, and a composite material of extruded film 3 / substrate / extruded film 1 / extruded film 2 is obtained under the action of the third composite mechanism, and then the composite film is trimmed under the action of a cutting knife; the flipping mechanism used in this step realizes the flipping of the material by using guide rollers at different positions; Step 5: The composite film after trimming is measured for thickness and inspected for defects using a thickness gauge and a defect detector, and the film is subjected to a final polarization treatment after the inspection; Step 6: The composite film subjected to the last polarization treatment is rolled up using a central rolling mechanism.

[0039] The above process firstly unwinds the substrate continuously through the unwinding mechanism, and uses the deviation correction mechanism to accurately ensure the consistency of the substrate position and the polarization treatment machine to improve the hydrophilicity and adhesion of the substrate surface, thus laying the foundation for the high quality of the composite film. The A side and B side of the substrate are extruded and composited multiple times using three extrusion mechanisms and three composite mechanisms, which not only improves the production efficiency, but also ensures the uniformity and adhesion of the extruded film. Polarization treatment is performed before each extrusion and composite to enhance the adhesion of the material. At the same time, the above process can replace the reel without stopping the machine, which meets the needs of actual production.

[0040] It should be noted that the multiple motors mentioned in the present invention refer to the motors contained in each unit component, not that one motor controls all the unit components.

[0041] The above is only for explaining the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention without creative work should be included in the protection scope of the present invention.

Claims

1. Laminating production line, characterized in that: include: An unwinding mechanism, used for continuously unwinding the substrate; An extrusion mechanism, three of which are provided along the substrate unwinding direction and are used to extrude the same or different types of plastics; A compounding mechanism, which is provided with three compounding machines and is arranged opposite to the extruder, and is used for pressing the substrate and the extruded melt film together to firmly combine them into a multi-layer composite material; The central winding mechanism has double-station winding parts symmetrically arranged along the center position. When the winding part at the first station completes winding the substrate, the central winding mechanism rotates clockwise or counterclockwise to make the substrate contact with the winding part at the second station for continuous winding.

2. The coating production line according to claim 1, characterized in that: The composite structure comprises: The silicone roller, also known as the composite pressing roller, can be opened or pressed to the cooling roller by air pressure or oil pressure to provide pressing force for the composite of the extruded film and the substrate; The cooling roller is placed under the extrusion mechanism. It is an active roller or a power roller and can rotate counterclockwise in the direction of substrate transmission to drive the composite material after the substrate and the extruded film are compounded. A peeling roller is placed above the cooling roller and is mainly used to peel the composite film composed of the substrate / extruded film from the cooling roller; During normal operation, the extrusion die head of the extrusion mechanism is located above the composite mechanism, and the composite mechanism presses the substrate and the extruded film to form a composite film.

3. The coating production line according to claim 1, characterized in that: The extrusion mechanism is provided with a T-shaped die head and a walking device. When the production line is working, the extrusion mechanism can move forward so that the die head is located above the composite mechanism; after the production line stops working, the extrusion mechanism moves backward so that the die head leaves the composite mechanism.

4. The laminating production line according to claim 1, characterized in that: The central winding mechanism also includes: A shell, wherein a disc is provided at the center of the shell and can rotate relative to the shell, the double-station winding member is mounted on the disc, and the first-station winding member and the second-station winding member can both rotate relatively to wind up the composite film; A cutting assembly is mounted at one end of the shell and is used for cutting the composite film; The unloading assembly is arranged on the shell. When any one of the winding member at the first station and the winding member at the second station is unloaded, the unloading assembly can lean against the winding member at the corresponding station and lift it until the winding member is unloaded from the disc.

5. The coating production line according to claim 4, characterized in that: The first station winding component structure is the same as the second station winding component structure, and the first station winding component includes: A rotating shaft, one end of which is connected to a first driving motor A and rotates under the drive of the first driving motor A, a disc is passed through the other end of the rotating shaft, a pneumatic clamping mechanism is provided on the outer side of the disc, and the rotating shaft is mounted on the pneumatic clamping mechanism and can rotate relative to the pneumatic clamping mechanism; The pneumatic shaft is connected to the rotating shaft by a pneumatic clamping mechanism. When the pneumatic clamping mechanism disconnects the pneumatic shaft from the rotating shaft, the pneumatic shaft can be unloaded by the unloading device. The paper tube is sleeved on the inflatable shaft. The inflatable shaft is provided with a plurality of airbags and key positions. The airbags are connected to the inflation port of the inflatable shaft. When the inflation port inflates the airbags, the airbags lift the key positions and fix them to the paper tube. The paper tube is used for winding the substrate.

6. The coating production line according to claim 1, characterized in that: The coating production line also includes: There are three polarization processing machines along the unwinding direction of the substrate, and the substrate is guided by guide rollers to enter from the input end of the polarization processing machine and is output from the output end of the polarization processing machine; The winding piece plug-in and pull-out assembly is arranged at the end of the central winding mechanism. The winding piece plug-in and pull-out assembly can move horizontally and vertically, and lift the first-station winding piece or the second-station winding piece to a position away from the central winding mechanism.

7. A coating process, characterized in that: Using the laminating production line as described in any one of claims 1 to 6, the steps include: Step 1: First, the substrate is unwound by the unwinding mechanism, and after the substrate passes through the deviation correction mechanism, the substrate is polarized by the polarization treatment machine to improve the hydrophilicity and adhesion of the substrate surface; Step 2: The substrate then enters the first composite mechanism, the first extrusion mechanism extrude the melt film, and the first composite mechanism presses the A side of the substrate and the extruded film to form a composite film with a substrate / extruded film structure; Step 3: Then, the extruded film surface of the composite film is polarized, and then the substrate / extruded film 1 enters the second composite mechanism, the second extrusion mechanism extrudes the melt film, and the second composite mechanism composites the substrate / extruded film 1 with the extruded film 2 to form a composite film of substrate / extruded film 1 / extruded film 2; Step 4: The composite film of substrate / extruded film 1 / extruded film 2 is flipped by a flipping mechanism, and the other side of the substrate is treated by a polarizing treatment machine after flipping, and then the melt film is extruded by the third extrusion mechanism, and the composite material of extruded film 3 / substrate / extruded film 1 / extruded film 2 is obtained under the action of the third composite mechanism, and then the substrate is trimmed under the action of a cutting knife; Step 5: Use a thickness gauge and a defect detector to measure the thickness and defect of the trimmed substrate respectively, and perform the final polarization treatment after the detection; Step 6: The composite film subjected to the last polarization treatment is rolled up using a central winding mechanism.

Images