A new type of solventless laminator with pre-drying and pre-heating functions

Abstract

The application provides a novel solvent-free laminating machine with pre-drying and pre-heating functions, which comprises a frame body, an oven, a conveying assembly and a hot air assembly. The oven is arranged on the top of the frame body. The conveying assembly comprises a feeding part, a discharging part and a feeding part. The feeding part and the discharging part are arranged on the frame body, and the feeding part is arranged in the oven. The hot air assembly is communicated with the oven. The hot air assembly comprises an air inlet route and an air return route. The air inlet route and the air return route are respectively provided with a supply fan and an exhaust fan. The film material entering the oven can be preheated and dried, the residual solvent in the color printing film can be further removed, the appearance defects such as "white spots" or "bubbles" caused by the gasification of residual solvent during the curing process of the laminated film after the laminating machine can be avoided, the pass rate of the laminated product is improved, and the final quality of the laminated product is further ensured.

Description

Technical Field

[0001] This application relates to the field of processing technology for packaging composite film products, specifically to a novel solvent-free laminating machine with pre-drying and pre-heating functions. Background Technology

[0002] In the current production process of color-printed packaging composite films and bags, the process of laminating and bonding multiple polymer films with different properties together using adhesive coating is called the "lamination process." The film after lamination combines the advantages of each polymer film layer. Typically, the lamination process requires two-component "solvent-based" polyurethane adhesives. During the actual lamination process, the solvent (such as ethyl acetate, n-propyl ester, butyl ester, etc.) must be removed, resulting in the emission of large amounts of volatile organic compounds and environmental pollution. Therefore, this does not conform to environmental protection trends and requirements.

[0003] The emergence of solvent-free laminating machines has largely overcome this drawback of traditional laminating processes. Although the adhesives used in solvent-free laminating machines are usually two-component polyurethane adhesives, by controlling the molecular weight of the adhesive and modifying its properties, solvents are no longer needed in the adhesive itself or in subsequent laminating processes. This greatly reduces the emission of volatile organic compounds (VOCs) during the laminating process and achieves better environmental friendliness. Therefore, solvent-free laminating machines have been widely promoted and applied in the past decade or so.

[0004] While existing solventless laminating machines can effectively achieve lamination between printed and blank films and significantly reduce volatile organic compound (VOC) emissions during the lamination process, thus achieving better environmental friendliness, they also have certain problems and drawbacks, mainly manifested as follows:

[0005] (1) At present, most of the color-printed films produced in the flexible plastic packaging industry are still printed with solvent-based polyurethane inks. The printed films inevitably have some solvent residue. When the solvent-free laminating machine unwinds and feeds the printed film at high speed, some of the solvent residue in the printed film will escape into the workshop working environment, which will generate unorganized volatile organic compounds (VOCs) emissions. This will pollute the workshop air to a certain extent and affect the health of the operators.

[0006] (2) After the solventless lamination process is completed, the laminated film after being removed from the machine generally needs to be placed in a constant temperature drying room (the constant temperature setting is usually between 35℃ and 45℃) for 1 to 3 days to promote further leveling of the adhesive and cross-linking and curing between the two components of the adhesive. This process is usually called "curing". Because the color film printed with solvent-based polyurethane ink will inevitably have a certain amount of solvent residue, and the curing process often causes the residual solvent to vaporize (especially when the color film has a high solvent residue), resulting in poor appearance such as "white spots" or "bubbles" on the composite film, and even batch scrapping, which will cause serious economic losses to the packaging plant.

[0007] (3) In the process of lamination, adhesive is used to bond two polymer films, which requires the polymer film to have a certain "surface energy". Generally speaking, a higher surface energy of the film is more conducive to the wetting and bonding of the adhesive to the composite substrate, and vice versa. The surface energy of the polymer film is closely related to the temperature of the film itself (within the normal temperature range, the higher the temperature, the higher the surface energy). Traditional solventless laminating machines do not have a system for preheating the films to be laminated. This may lead to problems such as poor adhesive wetting and poor bonding strength in the laminated products when the ambient temperature in the workshop is low (especially in winter, early spring or late autumn), resulting in batch scrapping of products and serious economic losses to the packaging plant.

[0008] Because of the aforementioned problems and shortcomings of existing solventless laminating machines, and the lack of effective solutions in the industry, those skilled in the art have provided a novel solventless laminating machine with pre-drying and pre-heating functions to solve the problems mentioned in the background art.

[0009] Therefore, existing technologies need further improvement and enhancement. Utility Model Content

[0010] This application provides a novel solvent-free laminating machine with pre-drying and pre-heating functions to solve problems in existing laminating machines, such as poor wetting of adhesives, weak bonding, poor lamination effect, and high emissions of volatile organic compounds.

[0011] The technical solution adopted in this application is as follows:

[0012] This application provides a novel solvent-free laminating machine with pre-drying and pre-heating functions. The novel solvent-free laminating machine includes a frame, an oven, a conveying assembly, and a hot air assembly. The oven is located on top of the frame. The conveying assembly includes an inlet section, an outlet section, and a feeding section. The inlet section and the outlet section are located on the frame, and the feeding section is located in the oven. The hot air assembly is connected to the oven and includes an air inlet path and a return path. The air inlet path and the return path are respectively equipped with a supply fan and an exhaust fan.

[0013] In a preferred embodiment of this application, the feeding section includes multiple transport guide rollers, which form a transport route and connect the feeding section and the discharging section. The air inlet route is a hot air pipe, which is located in the oven and arranged along the transport guide rollers.

[0014] In a preferred embodiment of this application, air nozzles are evenly spaced on the surface of the hot air duct.

[0015] In a preferred embodiment of this application, the hot air assembly further includes an electric heater and an air inlet box, wherein the electric heater is disposed between the air inlet box and the air supply fan, and the air inlet box is connected to the return air route.

[0016] In a preferred embodiment of this application, an air intake pipe and an air exhaust pipe are respectively provided on both sides of the exhaust fan. The air intake pipe is connected to the hot air pipe and placed inside the oven. The air exhaust pipe is connected to the return air route and is connected to the outside of the oven.

[0017] In a preferred embodiment of this application, a three-way control valve is provided at the connection between the air intake pipe and the hot air pipe, and a three-way control valve is provided at the connection between the exhaust pipe and the return air route.

[0018] In a preferred embodiment of this application, the hot air duct is provided with an air proportioning valve.

[0019] In a preferred embodiment of this application, the frame includes an infeed rack and an outfeed rack. The infeed section is located on the infeed rack and includes a feeding roll, a gas collecting hood, and a gluing mechanism. The gas collecting hood is connected to the drying oven, and an auxiliary exhaust fan is provided at the gas collecting hood and the connecting position.

[0020] In a preferred embodiment of this application, the discharge section is located in the discharge rack and includes a discharge roll and a cooling roller.

[0021] In a preferred embodiment of this application, the discharge rack is further provided with an auxiliary material roll. The film at the discharge roll is routed along the discharge roll, the gas collection hood, the conveyor guide roller of the feeding section, the glue coating mechanism, the conveyor guide roller, and the cooling roller to the discharge roll; the film of the auxiliary material roll is routed along the conveyor guide roller and the cooling roller to the discharge roll.

[0022] Due to the adoption of the above technical solution, the technical effects achieved by this application are as follows:

[0023] This application provides a novel solvent-free laminating machine with pre-drying and pre-heating functions. By setting up an oven and a hot air assembly inside the oven, the film material entering the oven is pre-heated and dried. This allows for further deep removal of residual solvents from the printed film, effectively preventing surface defects such as "white spots" or "bubbles" that may occur during the curing process after the composite film is removed from the machine due to the vaporization of residual solvents. This improves the yield rate of composite products and further ensures the final quality of the composite products. Furthermore, by preheating the film in the oven, the surface energy of the film can be effectively increased, allowing the adhesive to better wet and bond the film material. This effectively solves the problems of poor adhesive wetting and poor bonding strength that are prone to occur in composite products when the workshop production environment temperature is low (especially in winter, early spring, or late autumn). This achieves the beneficial effects of improving the appearance quality of composite products, ensuring key performance indicators of composite strength, and avoiding batch quality problems. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain this application and do not constitute an undue limitation of the present invention. In the drawings:

[0025] Figure 1 A schematic diagram of the overall structure of a novel solventless laminating machine with pre-drying and pre-heating functions provided for this application;

[0026] Figure 2 A schematic diagram of the coating mechanism of a novel solventless laminating machine with pre-drying and pre-heating functions provided for this application;

[0027] Figure 3 This is a schematic diagram showing the placement of the coating mechanism in a novel solventless laminating machine with pre-drying and pre-heating functions, as provided in this application.

[0028] Figure label:

[0029] 10. Frame; 11. Feed rack; 12. Discharge rack; 13. Unloading roll; 14. Gas collection hood; 141. Filter screen; 142. Auxiliary exhaust fan; 15. Glue coating mechanism; 151. Fixed roller; 152. Transfer roller; 153. Spreading roller; 154. Glue coating roller; 155. Pressing roller; 156. Glue baffle; 157. Glue tank; 16. Discharge roll; 17. Cooling roller; 18. Auxiliary roll;

[0030] 20. Oven; 21. Three-way control valve; 22. Air proportional valve;

[0031] 30 Feeding section; 31 Discharging section; 32 Feeding section; 33 Conveyor guide rollers;

[0032] 40 Hot air assembly; 41 Air inlet route; 42 Return air route; 43 Hot air duct; 431 Air nozzle; 44 Electric heater; 45 Air inlet box; 46 Supply fan; 47 Exhaust fan; 48 Suction duct; 49 Exhaust duct;

[0033] 50 Color-printed film; 51 Blank film. Detailed Implementation

[0034] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0036] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0039] like Figures 1 to 3 As shown, this application provides a novel solvent-free laminating machine with pre-drying and pre-heating functions. The novel solvent-free laminating machine includes a frame 10, an oven 20, a conveying assembly, and a hot air assembly 40. The oven 20 is located on the top of the frame 10. The conveying assembly includes a feeding section 30, a discharging section 31, and a feeding section 32. The feeding section 30 and the discharging section 31 are located on the frame 10, and the feeding section 32 is located in the oven 20. The hot air assembly 40 is connected to the oven 20 and includes an air inlet route 41 and a return air route 42. The air inlet route 41 and the return air route are respectively equipped with a blower 46 and an exhaust fan 47.

[0040] As shown in the figure, the feeding section 32 includes multiple transport guide rollers 33, which form a transport route and connect the feeding section 30 and the discharging section 31. The air inlet route 41 is a hot air pipe 43, which is located in the oven 20 and is arranged along the transport guide rollers 33.

[0041] During use, the film is transported by the conveyor roller 33. As shown in the figure, the hot air pipe 43 is located above the conveyor roller 33 and is adapted to the conveyor roller 33 to facilitate the preheating of the film during transport.

[0042] Furthermore, air nozzles 431 are evenly spaced on the surface of the hot air pipe 43. The air nozzles 431 allow the hot air in the hot air pipe 43 to blow onto the film of the transport guide roller 33, thereby improving the preheating and pre-drying effect.

[0043] As a preferred embodiment of this application, as shown in the figure, the hot air assembly 40 further includes an electric heater 44 and an air inlet box 45. The electric heater 44 is disposed between the air inlet box 45 and the air supply fan 46. The air inlet box 45 is connected to the return air route 42.

[0044] As shown in the figure, an air intake pipe 48 and an air exhaust pipe 49 are respectively installed on both sides of the exhaust fan 47. The air intake pipe 48 is connected to the hot air pipe 43 and is placed inside the oven 20. The air exhaust pipe 49 is connected to the return air route 42 and is connected to the outside of the oven 20.

[0045] The air inlet box 45 is used to absorb air from the workshop and deliver it to the air supply fan 46. An electric heater 44 installed between the air supply fan 46 and the air inlet box 45 can heat the air to ensure the temperature of the gas in the subsequent hot air duct 43. In order to reduce impurities in the air, an air filter element can be installed inside the air inlet box 45. The two work together to filter the gas sent into the air inlet box 45 to avoid impurities, dust and other substances that may be contained in the gas from affecting the composite quality.

[0046] Understandably, for the pre-drying and preheating process, the air inlet box 45 can first absorb the air in the environment and filter it to a certain extent. The air is heated by the electric heater 44 and then transported to the hot air duct 43 by the blower 46. The hot air flows along the hot air duct 43, and some of the hot air is blown onto the film by the air nozzle 431 to ensure the preheating effect. The gas is transported along the hot air duct 43 to the suction pipe 48 connected to the exhaust fan 47. The suction pipe 48 can not only absorb the gas remaining in the oven 20, but also recover the gas in the hot air duct 43. The gas is transported to the exhaust pipe 49 by the exhaust fan 47. The exhaust pipe 49 can be connected to the return air route 42, so that the gas with a certain temperature returns to the air inlet box 45 through the return air route 42, realizing the recovery of gas and ensuring that the recovered gas has a certain temperature, thereby shortening the heating time and reducing energy consumption.

[0047] Optionally, as shown in the figure, a three-way control valve 21 is installed at the connection between the suction pipe 48 and the hot air pipe, and at the connection between the exhaust pipe 49 and the return air route 42. The three-way control valve 21 can control the gas flow rate at the connection point, thereby adjusting the air intake. For example, taking the connection between the suction pipe 48 and the hot air pipe 43 as an example, the three-way control valve 21 can be adjusted by increasing the opening of the hot air pipe 43 and decreasing the opening of the suction pipe 48 to absorb air from the oven 20. This allows more hot air from the hot air pipe 43 to be recovered to the return air route 42, leaving more air in the oven 20 for continuous preheating.

[0048] Furthermore, as shown in the figure, the hot air duct 43 is equipped with an air proportioning valve 22. The air proportioning valve 22 is used to reasonably control the proportion of hot air in the pre-drying section and the preheating section of the hot air duct 43. Generally speaking, the proportion of hot air set for pre-drying the color printing film 50 needs to be significantly greater than the proportion of hot air for preheating the polymer blank film. This is because the pre-drying section needs to further and thoroughly remove the solvent residue from the color printing film 50, so a higher air temperature and air velocity are required. On the other hand, the preheating section only needs to perform simple preheating of the polymer blank film with hot air when the ambient temperature in the workshop is low.

[0049] As shown in the figure, for the preheating section and the pre-drying section, the frame 10 includes a feeding rack 11 and a discharging rack 12. The feeding part 30 is located on the feeding rack 11 and includes a feeding roll 13, a gas collecting hood 14 and a gluing mechanism 15. The gas collecting hood 14 is connected to the oven 20. An auxiliary exhaust fan 142 is provided at the gas collecting hood 14 and the connected position.

[0050] The coating mechanism 15, as an important structure for coating the laminating machine, mainly consists of five key rollers: a fixed roller 151, a transfer roller 152, a leveling roller 153, a coating roller 154, and a pressure roller 155. The space formed between the fixed roller 151, the transfer roller 152, and the left and right baffles 156 serves as a "glue tank 157". The two-component solvent-free laminating adhesive is mixed evenly by a mixer and then pumped into this space. In particular, the transfer roller 152 rotates at a certain speed, which can transfer the solvent-free laminating adhesive onto the leveling roller 153. The leveling roller 153 is responsible for uniformly thinning the adhesive transferred from the transfer roller 152 and further transferring it to the coating roller 154. The coating roller 154 and the pressure roller 155 press against each other and rotate synchronously, which can evenly coat the adhesive transferred from the leveling roller 153 onto the printed surface of the printed film.

[0051] The gas collection hood 14 is located behind the unwinding roll 13. The entire path that the color printing film 50 travels from its unwinding roll 13 to before entering the oven 20 is covered by the gas collection hood 14. The gas collection hood 14 is used to collect volatile organic compounds (VOCs) generated by the residual solvent during the high-speed unwinding process of the color printing film 50. A filter screen 141 is provided at the top of the gas collection hood 14 where it connects with the oven 20. This filter screen 141 is used to filter the gas entering the oven 20. The upper part of the filter screen 141 is connected to an air duct. A small-power auxiliary exhaust fan 142 is installed in the air duct to send the filtered gas in the gas collection hood 14 into the oven 20 in the form of positive pressure, thereby further reducing the content of volatile gases.

[0052] In addition, the discharge section 31 is located on the discharge rack 12 and includes a discharge roll 16 and a cooling roller 17. The discharge rack 12 is also provided with an auxiliary roll 18. The film at the discharge roll 13 is fed to the discharge roll 16 along the discharge roll 13, the gas collection hood 14, the transport guide roller 33 of the feeding section 32, the glue coating mechanism 15, the transport guide roller 33, and the cooling roller 17. The film of the auxiliary roll 18 is fed to the discharge roll 16 along the transport guide roller 33 and the cooling roller 17.

[0053] As for the auxiliary material roll 18, it can be understood that the unwinding section is mainly used to unwind the printed film. The unwound printed film passes through the transport guide roller 33 and enters the five-roll coating mechanism 15 for coating. The auxiliary material roll 18 is a polymer blank film that is unwound and passes through each material guide roller and tension control swing roller. The printed film of the unwinding roll 13 and the polymer blank film of the auxiliary material roll 18 will eventually be laminated at the composite clamping roller before the cooling roller 17. The cooling roller 17 is used to cool and shape the color printed film 50 after hot air drying and the polymer blank film after heating after lamination and before rewinding, so that its temperature drops to the workshop ambient temperature or below, in order to avoid defects such as wrinkles on the winding surface that may be caused by the thermal expansion and contraction effect of the polymer film.

[0054] In practical use, firstly, the printing film is placed at the unwinding roll 13 and conveyed to the gas collecting hood 14. The gas collecting hood 14 is typically made of transparent acrylic sheet with a thickness between 5mm and 8mm. It seals the outer perimeter of the path the color printing film 50 takes from unwinding to entering the drying oven 20, collecting volatile gases within it. The color printing film 50 continues along the transport guide roller 33 into the drying oven 20 and reaches the coating mechanism 15 for coating. The gas in the gas collecting hood 14 is then drawn into the drying oven 20 by the auxiliary exhaust fan 142. Simultaneously, the hot air assembly 40 starts working, the air inlet box 45 absorbs air and heats it through the electric heater 44, and the hot air flows along the hot air pipe 43. The first half of the transport route within the drying oven 20 can be considered the pre-drying section, which is the path from the unwinding roll to the coating mechanism 15 where the color printing film 50 completes the coating process. During the operation of the first half... The auxiliary material roll 18 holds the blank film 51 and enters the drying oven 20 under the drive of the transport guide roller 33. As shown in the figure, the left half is the pre-drying section and the right half is the preheating section. The air proportioning valve 22 is set between the preheating section and the pre-drying section. The air proportioning valve 22 is used to reasonably control the proportion of hot air in the pre-drying section of the color printing film 50 and the preheating section of the polymer blank film. Generally speaking, the proportion of hot air set for pre-drying the color printing film 50 should be significantly greater than the proportion of hot air for preheating the polymer blank film. This is because the pre-drying section needs to further remove the solvent residue from the color printing film 50, so a higher air temperature and air velocity are required. The preheating section only needs to preheat the polymer blank film simply with hot air when the ambient temperature in the workshop is low. Finally, the two films are combined at the composite clamping roller and reach the unloading roll 13 through the cooling roller 17 to complete the lamination of the entire film.

[0055] During this process, the air flowing through the hot air duct 43 can be transported to the return air route 42 by the exhaust fan 47, or transported to the outside of the oven 20, and can be further connected to other preheating structures for secondary utilization of the hot air.

[0056] It is understandable that the glue application mechanism 15 is a common configuration in the field, and the air proportioning valve 22 is also a common device; therefore, this application will not describe or elaborate on it further. The power and control of the transport guide roller 33 of the entire structure can be provided by an electric motor and controlled by a PLC or microcontroller program.

[0057] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0058] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0059] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A new type of solventless laminator with pre-drying and pre-heating functions, characterized in that, The novel solvent-free laminating machine includes a frame, an oven, a conveying assembly, and a hot air assembly. The oven is located on top of the frame. The conveying assembly includes an inlet, an outlet, and a feeding section. The inlet and outlet are located on the frame, and the feeding section is located inside the oven. The hot air assembly is connected to the oven and includes an air inlet path and a return path. The air inlet path and the return path are respectively equipped with a supply fan and an exhaust fan.

2. A novel solventless laminator with pre-drying and pre-heating functions as claimed in claim 1, wherein, The feeding section includes multiple transport guide rollers, which form a transport route and connect the feeding section and the discharging section. The air inlet route is a hot air pipe, which is located in the oven and arranged along the transport guide rollers.

3. A novel solventless laminator with pre-drying and pre-heating functions as claimed in claim 2, wherein, The surface of the hot air duct is provided with air nozzles spaced evenly apart.

4. A novel solventless laminator with pre-drying and pre-heating functions as claimed in claim 3 wherein, The hot air assembly also includes an electric heater and an air inlet box. The electric heater is disposed between the air inlet box and the air supply fan. The air inlet box is connected to the return air route.

5. A novel solventless laminator with pre-drying and pre-heating functions as claimed in claim 4 wherein, The exhaust fan is provided with an air intake pipe and an exhaust pipe on both sides. The air intake pipe is connected to the hot air pipe and placed inside the oven. The exhaust pipe is connected to the return air route and is connected to the outside of the oven.

6. A novel solventless laminator with pre-drying and pre-heating functions as claimed in claim 5 wherein, A three-way control valve is installed at the connection between the air intake pipe and the hot air pipe, and the three-way control valve is also installed at the connection between the exhaust pipe and the return air route.

7. A novel solvent-free laminating machine with pre-drying and pre-heating functions as described in claim 6, characterized in that, The hot air duct is equipped with an air proportioning valve.

8. A novel solventless laminator with pre-drying and pre-heating functions as claimed in claim 6 wherein, The frame includes an infeed rack and an outfeed rack. The feeding section is located on the infeed rack and includes a feeding roll, a gas collecting hood, and a gluing mechanism. The gas collecting hood is connected to the oven, and an auxiliary exhaust fan is provided at the gas collecting hood and the connected position.

9. A novel solventless laminator with pre-drying and pre-heating functions as claimed in claim 8, wherein, The discharge section is located on the discharge rack and includes a discharge roll and a cooling roller.

10. A novel solventless laminator with pre-drying and pre-heating functions as claimed in claim 9, wherein, The discharge rack is also provided with an auxiliary material roll. The film at the unloading roll travels along the unloading roll, the gas collecting hood, the conveying guide roller of the feeding section, the glue coating mechanism, the conveying guide roller, and the cooling roller to the discharge roll; the film of the auxiliary material roll travels along the conveying guide roller and the cooling roller to the discharge roll.

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