Cast film stripping chamber

Abstract

The utility model discloses a cast film stripping chamber which is of a sealed box body structure at least provided with a film inlet, a film outlet and a ventilation system, a multi-roller system used for conveying films is arranged in the stripping chamber, and a negative pressure air curtain device is arranged at the film inlet of the stripping chamber. The negative pressure air curtain device comprises a first air draft part and a second air draft part which are oppositely arranged, at least one flow equalizing plate is arranged in the first air draft part and / or the second air draft part, and the first air draft part and the second air draft part are located on the upper side and the lower side of a film conveying path correspondingly. A channel space for a film to pass through is formed between the first air draft part and the second air draft part, and the width of the channel space is matched with the width of the film. According to the scheme, the negative pressure air curtain device is arranged, the film can be conveyed in the front space and the rear space through the channel space, and due to the fact that a negative pressure air curtain exists between the two spaces, mutual influence of temperature and gas of the two spaces is avoided, and accuracy and stability of process environment control are effectively guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of film manufacturing equipment, and specifically relates to a cast film peeling chamber. Background Technology

[0002] The stripping chamber, located between the steel strip casting machine and the cross-stretching machine, is used to transport the stripped wet film through a multi-roller system, further harden the film, and adjust its tension. Existing technologies, such as the Chinese utility model patent with authorization announcement number CN217908659U, mention a stripping chamber and provide a simplified structural diagram. However, existing stripping chamber structures have the following drawbacks: 1. Poor control of temperature and air within the stripping chamber. The stripped film enters the stripping chamber through a through-hole inlet, where gas may escape. This affects temperature control in different areas and may also cause evaporated solvent gas from the cast film to enter the high-temperature front end, leading to excessive concentrations and potential flammability / explosion. 2. During the multi-roller system transport process, problems such as poor film tension, wrinkles, breakage, thickness deformation, edge curling, fire, and dust and impurity contamination on the film surface may occur. Current equipment cannot effectively address these issues. Therefore, existing solutions cannot meet the high-standard production process requirements of current and future high-end films, necessitating a more detailed and comprehensive design for a novel stripping chamber system. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a cast film release chamber, which solves the problems of easy gas escape and poor process effect in the existing solution, and enables more precise control of gas, temperature environment and other aspects in the process, thereby improving safety and process quality.

[0004] According to the technical solution of this utility model, this utility model provides a cast film peeling chamber. The peeling chamber is a sealed box structure with at least a film inlet, an outlet, and a ventilation system. The peeling chamber has a multi-roller system for conveying the film. A negative pressure air curtain device is provided at the film inlet of the peeling chamber. The negative pressure air curtain device includes a first exhaust section and a second exhaust section arranged opposite to each other. At least one flow equalization plate is provided in the first exhaust section and / or the second exhaust section. The first exhaust section and the second exhaust section are respectively located on the upper and lower sides of the film conveying path. A channel space for the film to pass through is formed between the first exhaust section and the second exhaust section. The width of the channel space is adapted to the width of the film.

[0005] Furthermore, in the multi-roll system, the distance between the lowest roller and the floor of the stripping chamber is greater than one meter.

[0006] Furthermore, the entrance and / or exit of the passage space are equipped with an adjustable windbreak mechanism, which has reserved space to adapt to the thickness of the membrane.

[0007] Furthermore, a wind speed acquisition device is installed at the flow equalization plate, and a wind speed adjustment mechanism is connected to the outside of the first exhaust section and / or the second exhaust section.

[0008] Furthermore, the flow equalization plates inside the first exhaust section and / or the second exhaust section are arranged in multiple layers. The multi-layer flow equalization plates are arranged parallel to the film conveying direction or inclined to the film conveying direction. The flow equalization plates have a number of air holes or a number of slit holes. The air holes or slit holes in each layer are arranged opposite to each other or staggered.

[0009] Furthermore, near the film inlet, the multi-roller system has multiple guide rollers arranged side by side to form a cooling and conveying section for the film; the peeling chamber is equipped with an air supply mechanism, and an air filter is installed at the air supply mechanism.

[0010] Furthermore, the multi-roller system includes guide rollers, traction rollers, and gravity rollers mounted on the multi-roller system frame; the guide rollers are driven rollers, and multiple guide rollers are distributed along the film conveying direction in the multi-roller system; the peeling roller is located upstream of the peeling chamber, the traction roller is located downstream of the peeling roller, and one or more guide rollers are spaced apart between the traction roller and the peeling roller; the traction roller includes two adjacent drive rollers, and the film conveying path is S-shaped at the traction roller; the gravity roller is located downstream of the traction roller, and the gravity roller is a driven roller, with adjacent guide rollers on both its upstream and downstream sides; the height of the gravity roller is lower than that of the guide rollers on both sides of the gravity roller; the position of the gravity roller is movable and connected to a tension control mechanism.

[0011] Furthermore, it also includes two pressure rollers, which are located at the two side edges of the multi-roller system. The two pressure rollers are located on the upper and / or lower sides of the film conveying path, and there is a gap between the two pressure rollers and the film conveying path.

[0012] Furthermore, it also includes a flame-retardant roller assembly, which includes a flame-retardant pressure roller and a flame-retardant guide roller. The flame-retardant pressure roller is set on the balancing mechanism, and the flame-retardant guide roller is one of the guide rollers. Under normal conditions, the flame-retardant pressure roller and the flame-retardant guide roller are in a non-closed state. In the event of a fire, the balancing mechanism drives the flame-retardant pressure roller and the flame-retardant guide roller to close.

[0013] Furthermore, the balancing mechanism includes a set of swing arms, with flame-retardant pressure rollers positioned between the swing arms. The swing arms are also equipped with a fixed rotating shaft and a balancing adjustment mechanism. The flame-retardant pressure rollers are positioned on one side of the flame-retardant guide rollers via the fixed rotating shafts, and the balancing adjustment mechanism enables the closing and opening of the flame-retardant pressure rollers and the flame-retardant guide rollers.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0015] 1. The stripping chamber of this utility model is equipped with a negative pressure air curtain device, which can isolate and divide different process environment areas such as temperature zones, thereby meeting various complex process requirements. At the same time, due to the presence of the negative pressure air curtain, a local transition area can be formed between process environment areas, avoiding problems such as sudden temperature changes of the film after entering a certain area. In this negative pressure air curtain device, two oppositely arranged exhaust units simultaneously exhaust air, and each is equipped with a flow equalization plate to ensure the uniformity of airflow intensity. A negative pressure air curtain is formed in the channel space between the two exhaust units. The film can be transmitted between the front and rear spaces through the channel space. Because there is a negative pressure air curtain between the two spaces, the temperature and gas of the two spaces are avoided from affecting each other (such as the escape / cross-contamination of gases with different temperatures and different compositions), effectively ensuring the accuracy and stability of process environment control for high-end processes.

[0016] 2. The multi-roller system in the peeling chamber of this utility model is positioned higher than the ground. This arrangement can prevent dust from being kicked up by personnel during operation from sticking to the film. In existing equipment, the rollers are usually placed close to the ground for reasons such as ease of maintenance. However, this solution takes into account the high-quality requirements of high-end films and improves the design from the often overlooked perspective of roller arrangement height, further ensuring film quality.

[0017] 3. In the multi-roller system of the peeling chamber of this utility model, both traction rollers are active rollers. The film path is S-shaped, bypassing the two traction rollers. This increases the wrap angle and achieves tension isolation. Existing solutions usually use pressure rollers to isolate the tension before and after the film during transport. However, since the film here is a wet film containing a lot of solvent, using pressure rollers would cause dents and affect the film thickness. Therefore, this special traction roller structure is designed. Furthermore, this solution has a gravity roller behind the traction roller to provide constant tension through gravity or other means, thereby adjusting the tension and performing micro-longitudinal stretching. This improves the film quality. More preferably, two pressure rollers are also provided to help flatten the film edges and prevent the film edges from curling. A flame-retardant roller is also provided, which presses lightly on the film with a slight pressure. When the film catches fire, it can extinguish the fire without causing dents or other problems, and does not affect the surface quality of the film. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural schematic diagram of the stripping chamber according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 A three-dimensional structural schematic diagram of the stripping chamber in the embodiment shown.

[0020] Figure 3 This is a structural schematic diagram of a negative pressure air curtain device according to an embodiment of the present invention.

[0021] Figure 4 This is a three-dimensional structural schematic diagram of a negative pressure air curtain device according to another embodiment of the present utility model.

[0022] Figure 5 yes Figure 4 The diagram shows a rear view of the negative pressure air curtain device.

[0023] Figure 6 yes Figure 4 The diagram shows a left-side view of the negative pressure air curtain device.

[0024] Figure 7 This is a three-dimensional structural schematic diagram of a gravity roller assembly according to an embodiment of the present utility model.

[0025] Figure 8 yes Figure 7 The diagram shows a front view of the gravity roller assembly.

[0026] Figure 9 yes Figure 7 The diagram shows a right-side view of the gravity roller assembly.

[0027] Figure 10 yes Figure 1 A left-side schematic view of the multi-roller system portion of the illustrated embodiment.

[0028] Figure 11 This is a three-dimensional structural diagram of the two pressure rollers according to another embodiment of the present utility model.

[0029] Figure 12 yes Figure 1 A schematic diagram of the flame-retardant roller assembly in the illustrated embodiment.

[0030] Figure 13 yes Figure 12 A cross-sectional view of the portion of the flame-retardant roller assembly excluding the guide rollers.

[0031] Figure 14 yes Figure 13 A three-dimensional schematic diagram of the structure shown.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Negative pressure air curtain device; 101. First exhaust section; 102. Second exhaust section; 103. Flow equalization plate; 104. Channel space; 105. Channel side plate; 106. Slit baffle; 107. First airtight air box; 108. Second airtight air box; 109. First exhaust pipe; 110. Second exhaust pipe; 111. Wind speed acquisition device; 112. Wind speed adjustment mechanism; 2. Traction roller; 3. Gravity roller; 31. Gravity roller slide rail; 32. Roller sprocket; 33. Roller chain; 34. Floating block; 35. Gravity roller synchronous shaft; 36. Counterweight sprocket; 37. Counterweight chain; 38. Gravity 39. Roller counterweight mechanism; 4. Wire encoder; 5. Pressure rollers on both sides; 6. Pressure roller base; 7. Pressure roller track frame; 8. Pressure roller positioning part; 9. Flame-retardant roller assembly; 10. Flame-retardant pressure roller; 11. Flame-retardant guide roller; 2. Flame-retardant guide roller; 32. Balancing mechanism; 43. Pressure roller fine-tuning device; 54. Top rod kit; 55. Pressure roller top rod; 66. Angle fine-tuning strip hole; 77. Angle fine-tuning screw; 88. Swing arm; 99. Fixed rotating shaft; 100. Balance adjustment mechanism; 110. Balance counterweight; 121. Counterweight adjusting bolt; 132. Fixed limit rod; 143. Longitudinal limit groove; 15. Guide roller; 16. Peeling roller. Detailed Implementation

[0034] This invention provides a cast film release chamber that solves the problems of gas escape and poor process effect in existing solutions, enabling more precise control of gas, temperature environment and other aspects in the process, thereby improving safety and process quality.

[0035] The upstream side of the peeling chamber is sealed to the casting machine. A peeling roller is located between the casting machine and the peeling chamber. After casting, the film, having partially evaporated solvent and partially hardened, is peeled off from the steel belt at the active drum of the casting machine by the peeling roller near the peeling chamber. It then enters the peeling chamber for further solvent discharge and longitudinal stretching. Downstream of the peeling chamber is a cross-stretcher, where the film is further heated and stretched laterally. Downstream of the peeling chamber is a clamping adjustment mechanism used to adjust the angle of the cross-stretcher chain clamp (clamping the film edge). The relevant basic processes and structures are existing technology and will not be elaborated upon here.

[0036] Please see Figure 1 , Figure 2 An embodiment of the present invention provides a cast film release chamber, which is a sealed box structure having at least a film inlet, an outlet, and a ventilation system. The release chamber includes a multi-roller system for conveying the film (the multi-roller system is located within...). Figure 2 For simplified illustration purposes, the front view of the multi-roller system is shown below. Figure 10As shown); the film peeled off from the casting machine enters the film inlet, and during the process of conveying in the peeling chamber, tension control and stretching are carried out. At the same time, solvent will evaporate from the film. The solvent gas will be discharged from the peeling chamber through the ventilation system and collected and treated. The peeling chamber is isolated from the outside world to prevent the solvent gas from escaping and causing explosions or harming the health of workers.

[0037] Please also refer to Figures 3 to 6 In this solution, to improve the isolation effect on the gas and temperature inside the stripping chamber, a negative pressure air curtain device 100 is installed at the film inlet of the stripping chamber. The negative pressure air curtain device 100 includes a first exhaust section 101 and a second exhaust section 102 arranged opposite to each other. At least one flow equalization plate 103 is provided in the first exhaust section 101 and / or the second exhaust section 102. The first exhaust section 101 and the second exhaust section 102 are located on the upper and lower sides of the film conveying path, respectively. A channel space 104 for the film to pass through is formed between the first exhaust section 101 and the second exhaust section 102. The width of the channel space 104 is adapted to the width of the film.

[0038] It should be noted that the "opposite" of the first exhaust section 101 and the second exhaust section 102 refers to the opposite of the exhaust ports. In other words, both have through holes (which can be called air vents) on their inner sides for air to pass through. The air vents can be directly opened on the exhaust section (such as the bellows) or located on the flow equalization plate 103. To ensure the effect of the negative pressure air curtain, this solution limits the use of the flow equalization plate 103 on at least one side of the exhaust section. The flow equalization plate 103 can be selected as one piece, or multiple pieces or multiple layers, which will be further described later. The size of the channel space 104 is adapted to the membrane, which can better ensure the formation of a relatively sealed partition on both sides of the negative pressure air curtain device. Specifically, the width covers the membrane and is generally greater than or equal to the width.

[0039] During operation, the first exhaust section 101 and the second exhaust section 102 simultaneously perform exhaust. The flow equalization plate 103 ensures uniform airflow. Without the flow equalization plate, problems arise such as higher airflow near the exhaust section (e.g., exhaust duct) and insufficient airflow further away. The channel space 104 allows the film being transported in the process equipment to pass through. The film is not subjected to strong airflow impact during passage. The airflow in the two spaces separated by the negative pressure air curtain device is drawn away by the first exhaust section 101 and the second exhaust section 102 when it reaches the vicinity of the negative pressure air curtain device, preventing airflow from the previous space from entering the next space, and vice versa. This ensures that the environments of adjacent spaces are relatively independent, while also guaranteeing the ventilation effect within the equipment. In this solution, the negative pressure air curtain device 100 is set up based on an existing or required ventilation system. In other words, the negative pressure air curtain device 100 is mainly used to form an air curtain at the entrance, while the work of providing airflow within the stripping chamber and timely removal of solvent still mainly relies on the ventilation system.

[0040] Preferably, the inlet and / or outlet of the channel space 104 has an adjustable baffle mechanism, which has a space adapted to the film thickness. The adjustable baffle mechanism is used to further reduce the inlet / outlet, reducing it to a value close to the film thickness, thereby better separating the spaces before and after the negative pressure air curtain device and preventing the inlet / outlet from being too large, allowing gas to escape. For example, the adjustable baffle mechanism includes at least one slit baffle 106 located on the first exhaust section 101 and / or the second exhaust section 102. The slit baffle 106 consists of two upper and lower baffles sealed and fixed to the outside. The slit baffle 106 forms a slit at the inlet and / or outlet of the channel space 104, and the size of the slit is smaller than the channel space 104. The distance between the first exhaust section 101 and the second exhaust section 102 should not be too close. Therefore, the size of the inlet and / or outlet of the channel space 104 can be further defined by the slit baffle 106, and preferably the position and size of the slit are adjustable (e.g., formed by two detachable / adjustable baffles). More specifically, for example, the slit is located in a central position between the first exhaust section 101 and the second exhaust section 102, so that the distance between the membrane and the first exhaust section 101 and the second exhaust section 102 is substantially the same. The slit baffle 106 allows a thinner membrane to pass through while preventing the escape of gas from the stripped room. It is conceivable that in other feasible embodiments, the adjustable windbreak mechanism is a plate with a slit, or a pipe-like structure, or further provided with a flow guiding / filtering structure, etc., all of which are intended to serve as windbreaks and do not depart from the concept of this solution.

[0041] Preferably, the system further includes channel side plates 105 disposed on the outer sides of the first exhaust section 101 and the second exhaust section 102. The channel side plates 105, together with the flow equalization plates 103 of the first exhaust section 101 and the second exhaust section 102, form the four side walls of the channel space 104. Therefore, in practical applications, the position and size of the channel space 104 are no larger than the connection opening between the two spaces, and it is sealed to the connection opening, ensuring that the airflow at the connection opening can only flow to the first exhaust section 101 and the second exhaust section 102, and cannot escape from other places around the connection opening. It is understood that for cases where the process space (stripping chamber) is small or the first exhaust section 101 and the second exhaust section 102 are large, the side walls of the process space can be equivalent to the side walls of the channel space, effectively achieving the desired effect, thus eliminating the need for the channel side plates 105 (and other structures restricting the connection opening).

[0042] In some embodiments, both the first exhaust section 101 and the second exhaust section 102 are strip-shaped to adapt to the width of the space connection opening (membrane inlet); the flow equalization plate 103 is a porous strip-shaped flat plate, and the flow equalization plates 103 of the first exhaust section 101 and the second exhaust section 102 are parallel. This solution is small in size while achieving the required functions, making it easy to produce and use; the air curtain device should not be too large, so as not to affect the operation of the main ventilation system. In addition, if the air curtain device is too large, it will also affect the overall size of the equipment box, resulting in increased costs and poor thermal insulation. For example, the first exhaust section 101 and the second exhaust section 102 are arranged vertically to adapt to the laterally conveyed membrane.

[0043] More specifically, the negative pressure air curtain device includes a first airtight air box 107 and a second airtight air box 108; the first airtight air box 107 is connected to a first exhaust pipe 109, and a first exhaust section 101 is formed on the side of the first airtight air box 107 facing the second airtight air box 108; the second airtight air box 108 is connected to a second exhaust pipe 110, and a second exhaust section 102 is formed on the side of the second airtight air box 108 facing the first airtight air box 107. A flow equalization plate 103 is matched with the first airtight air box 107 and the second airtight air box 108 to ensure airflow uniformity. A channel side plate 105 and a slit baffle 106 (if present) are disposed on the first airtight air box 107 and the second airtight air box 108. Preferably, a first exhaust pipe 109 is provided on both sides of the first airtight air box 107, and a second exhaust pipe 110 is provided on both sides of the second airtight air box 108; this method of connecting exhaust pipes on both sides helps to make the airflow uniform at all points of the flow equalization plate 103.

[0044] Furthermore, a wind speed acquisition device 111 (such as an anemometer) is provided at the flow equalization plate 103. A wind speed adjustment mechanism 102 (such as a speed-regulating fan, or an independent air-regulating valve, etc.) is connected to the outside of the first exhaust section 101 and / or the second exhaust section 102 via exhaust ducts, thereby enabling monitoring and adjustment of the wind speed. Specifically, the first exhaust section 101 and / or the second exhaust section 102 are connected to exhaust ducts, which include, for example, a first exhaust pipe 109 and a second exhaust pipe 110. The wind speed adjustment mechanism 102 is located at the outer end of the exhaust ducts. Preferably, the wind speed acquisition device 111 is also electrically connected to the wind speed adjustment mechanism 102, enabling signal transmission and thus achieving automatic adjustment and control based on the wind speed. More specifically, the ends of the first exhaust pipe 109 and the second exhaust pipe 110 may converge into a single pipe, connecting to a wind speed adjustment mechanism 102, or the first exhaust pipe 109 and the second exhaust pipe 110 may be respectively connected to their respective wind speed adjustment mechanisms.

[0045] Preferably, the flow equalization plates 103 inside the first exhaust section 101 and / or the second exhaust section 102 are multi-layered, which can improve the flow equalization effect. The multi-layered flow equalization plates 103 are arranged parallel to the film conveying direction or inclined to the film conveying direction; for example Figure 3 In the illustrated embodiment, the flow equalization plate 103 consists of two layers arranged parallel to each other (horizontally) along the film conveying direction; in other embodiments, the flow equalization plate 103 is not parallel to the film conveying direction but at a certain angle, i.e., it is inclined. The flow equalization plate 103 has a plurality of air holes or a plurality of slit holes, and the air holes or slit holes in each layer are arranged oppositely or staggeredly. Relative arrangement means that the air holes are corresponding in the wind speed direction, and the line connecting several corresponding air holes is consistent with the wind speed direction; staggered arrangement means that the air holes are staggered in the wind speed direction. In some embodiments, the air holes are, for example, small holes, closely arranged on the flow equalization plate 103; in other embodiments, the air holes are arranged strip-shaped holes, or the flow equalization plate 103 is grid-like or mesh-like; or it is a combination of multiple hole types; the slit holes are elongated slit-shaped holes, for example, one or more slit holes, and the length direction of the slit holes is, for example, parallel to the film width direction or inclined at a certain angle.

[0046] It should be noted that existing air curtain devices generally form an air curtain by blowing out a strong airflow, and are usually not set up opposite each other on both sides. Furthermore, they cannot be used in the stripping chamber. The film is a wet film with a high solvent content, and a strong airflow cannot impact the film surface, otherwise it will affect the film quality. Therefore, the existing stripping chamber does not have an air curtain and is a directly connected structure. Although there is a ventilation system to provide negative pressure, gas can still escape. This negative pressure air curtain device can be optionally installed at the input end of the equipment housing. It can isolate and divide different process environment areas, such as temperature zones, thereby meeting various complex process requirements. At the same time, due to the presence of the negative pressure air curtain, a local transition zone can also be formed between process environment areas, avoiding problems such as sudden temperature changes when the film enters a certain area. In this negative pressure air curtain device, two oppositely arranged exhaust units simultaneously exhaust air, each equipped with a flow equalization plate to ensure the uniformity of airflow intensity. A negative pressure air curtain is formed in the channel space between the two exhaust units. The film can be transmitted between the front and rear spaces through the channel space. Because there is a negative pressure air curtain between the two spaces, problems such as temperature and gas mutual influence (e.g., escape / cross-contamination of gases with different temperatures and compositions) are avoided, effectively ensuring the accuracy and stability of process environment control for high-end processes.

[0047] Preferably, the multi-roller system inside the stripping chamber is positioned above the ground. Specifically, for example, the distance between the lowest roller in the multi-roller system and the floor of the stripping chamber is greater than one meter, and most rollers are arranged at a height of approximately 2.2 meters, especially those near the inner door of the buffer room. This arrangement prevents dust from being stirred up by personnel during operation and adhering to the film. It should be noted that while both the stripping chamber and its surroundings are clean spaces, this only guarantees an extremely low dust concentration, not a complete absence of dust. Existing equipment often places rollers close to the ground for ease of maintenance, but this design, considering the high-quality requirements of high-end films, improves upon this often-overlooked aspect of roller arrangement height, further ensuring film quality.

[0048] Please see Figure 1 The multi-roller system of this solution includes guide rollers 6, traction rollers 2, and gravity rollers 3 mounted on the multi-roller system frame. Typically, each roller is horizontally positioned and relatively long to match the film width. Furthermore, both ends of each roller are connected to the multi-roller system frame along its length to ensure stability. The roller's axis position is either fixed or floating, depending on its function, and the roller can rotate around its axis. The basic structure of the rollers and frame is existing technology and will not be described in detail here.

[0049] Guide roller 6 is a driven roller, fixedly mounted on the frame of the multi-roller system. Multiple guide rollers 6 are distributed along the film conveying direction in the multi-roller system. The film is tractioned by the driving roller in the multi-roller system, adheres to the guide roller 6, and the guide roller 6 can be passively rotated by the film, thereby conveying the film along a set path.

[0050] The traction roller 2 is located downstream of the peeling roller 7, which is located upstream of the peeling chamber. One or more (six in the figure) guide rollers 6 are spaced between the traction roller 2 and the peeling roller 7. The traction roller 2 includes two adjacent drive rollers with a gap between them. The film transport path at the traction roller 2 is S-shaped, so it can also be visually referred to as an S-roller.

[0051] The function of traction roller 2 is to increase the wrap angle. Since both traction rollers are active rollers, this achieves tension isolation, meaning the tension conditions on the upstream and downstream sides of the tension isolation roller assembly are independent. More specifically, for example, of the two active rollers of traction roller 2, the first active roller on the upstream side is located diagonally above the second active roller on the downstream side, and the second active roller on the downstream side is positioned lower than its downstream guide roller. This results in a larger wrap angle for the S-shaped film at the traction roller, further enhancing the tension isolation effect. Figure 1 In the structure shown, the stripping roller 7 and the traction roller 2 are driving rollers, and the rest are driven rollers. Figure 1 Excluding the leftmost active drum of the casting machine, which is not included in the multi-roll system.

[0052] In some embodiments, near the film inlet, the multi-roller system has multiple guide rollers arranged side-by-side to form a cooling conveying section for the film. Specifically, in the illustrated embodiment, at least three (e.g., four to six) guide rollers 6 are arranged between the traction roller 2 and the peeling roller 7 to form the cooling conveying section. The cooling conveying section is formed by these guide rollers 6 to a predetermined length, and its function is to reduce the temperature of the film to, for example, 30°C to 40°C after conveying. The arrangement of the guide rollers 6 must also ensure the wrap angle, for example, about 30°. The arrangement, number, and spacing of the guide rollers 6 are determined according to the angle requirements. Further, the peeling chamber is provided with an air supply mechanism above the cooling conveying section to supply clean air for cooling the film. The clean air is, for example, room temperature, thereby maintaining the required low temperature in the cooling conveying section. An air filter is provided at the air supply mechanism to further ensure the cleanliness of the input air. Optionally, air supply mechanisms are also provided at other locations in the peeling chamber, and air filter devices are provided at the air supply mechanisms to supply clean air at other desired locations.

[0053] Gravity roller 3 is located downstream of traction roller 2, and there are one or more gaps between gravity roller 3 and traction roller 2. Figure 1 The gravity roller 3 is a driven roller, with adjacent guide rollers 6 on both its upstream and downstream sides. The gravity roller 3 is positioned lower than the guide rollers 6 on either side of it. The gravity roller 3 is movably positioned and connected to a tension control mechanism. The function of the gravity roller 3 is to adjust tension and perform micro-longitudinal stretching. Its main principle is to provide constant tension through gravity or other means via the tension control mechanism. When the gravity roller 3 is vertically movable, the tension control mechanism causes it to pull and stretch the film downwards with a constant tension. Preferably, this constant tension is adjustable.

[0054] Please see Figures 7 to 9In a preferred embodiment, the tension control mechanism of the gravity roller 3 includes a gravity roller counterweight mechanism. Specifically, the gravity roller assembly includes a gravity roller 3 and a gravity roller counterweight mechanism 38. The gravity roller 3 and the gravity roller counterweight mechanism 38 are arranged on the same closed chain, or they are arranged on two closed chains respectively through a synchronous transmission mechanism (in other words, the gravity roller 3 and the gravity roller counterweight mechanism 38 are arranged on different closed chains, with a larger spatial distance, while still maintaining a synchronous transmission relationship). The closed chain is a ring chain, which can rotate along the ring path. The closed chain forms a structure similar to a fixed pulley (or a lever structure). Therefore, the gravity roller 3 and the gravity roller counterweight mechanism 38 can be located on the same side or opposite sides of the fulcrum of the lever structure. When the gravity roller 3 and the gravity roller counterweight mechanism 38 are located on the upper and lower sides of the closed chain, respectively, the sum of the film tension F and the counterweight pulling force G1 of the gravity roller counterweight mechanism is balanced with the gravity force G2 of the gravity roller. That is, the resultant force of the system = F + G1 - G2 = 0, therefore F = G2 - G1. When the gravity roller 3 and the gravity roller counterweight mechanism 38 are located on the same side of the closed chain, the sum of the counterweight pulling force G1 and the gravity force G2 of the gravity roller is balanced with the film tension F. That is, the resultant force of the system = F - G1 - G2 = 0, therefore F = G1 + G2.

[0055] In some embodiments, the gravity roller 3 and the gravity roller counterweight mechanism 38 are arranged on the same closed chain; the closed chain is a vertically arranged ring, and the closed chain is driven by sprockets located at its upper and lower ends; a floating block 34 and the gravity roller counterweight mechanism are connected to the closed chain, and the gravity roller 3 is rotatably connected to the floating block 34.

[0056] In some preferred embodiments, the closed chain includes a roller chain 33 and a counterweight chain 37, with a gravity roller 3 and a gravity roller counterweight mechanism 38 respectively mounted on the roller chain 33 and the counterweight chain 37. The roller chain 33 is a vertically arranged ring, and is drivenly connected to roller sprockets 32 located at its upper and lower ends. A floating block 34 is connected to the roller chain 33, and the gravity roller 3 is rotatably connected to the floating block 34. The synchronous transmission mechanism includes a gravity roller synchronous shaft 35, and a counterweight sprocket 36 is coaxially connected to the upper and / or lower roller sprockets 32 through the gravity roller synchronous shaft 35. A counterweight chain 37 is drivenly connected to the counterweight sprocket 36. The counterweight chain 37 is a vertically arranged ring, and the gravity roller counterweight mechanism 38 is connected to the counterweight chain 37.

[0057] Preferably, the system further includes a gravity roller slide rail 31 vertically mounted on the frame. The floating block 34 is slidably connected to the gravity roller slide rail 31 to limit the gravity roller 3, ensuring that it can only move up and down smoothly. It is understood that the gravity roller slide rail 31 can be used for auxiliary limiting in schemes where the gravity roller 3 and the gravity roller counterweight mechanism 38 are mounted on the same closed chain or on different closed chains.

[0058] In this embodiment, the gravity roller counterweight mechanism 38 and the floating block 34 are located on different sides of the annular chain of the counterweight chain 37 and the roller chain 33. Here, "different sides" refers to the two straight segments (i.e., the opposing "upward side" and "downward side") in the annular chain structure, such as... Figure 9 As shown; since the longitudinal tensile tension required by the film is usually not large, the gravity of the gravity roller 3 can be "reduced" by the gravity roller counterweight mechanism 38 to achieve the desired constant tension effect; of course, for cases where the required tension is large, the gravity roller counterweight mechanism 38 can be placed on the same side as the floating block 34 and the gravity roller 3.

[0059] More specifically, since the length of the gravity roller 3 is greater than the width of the film and is generally longer, both ends of the gravity roller 3 along its length are connected to two floating blocks 34. Furthermore, the gravity roller assembly has a mirror-symmetric structure relative to the midpoint of the gravity roller 3's length. This mirror symmetry includes the consistency of the floating blocks 34 and the gravity roller counterweight mechanism 38 on both sides (including, for example, consistent mass and symmetrical position). In other words, the two ends of the gravity roller 3 employ the same and symmetrical structure, ensuring that the forces acting on both ends of the gravity roller 3 are consistent and their positions are aligned, thereby enabling uniform stretching of the film. More preferably, the roller sprockets 32 on both sides (above) and the counterweight sprockets 36 (a total of four sprockets) are coaxially connected via a gravity roller synchronous shaft 35, resulting in a more stable and simpler structure.

[0060] Preferably, the counterweight chain 37 and counterweight sprocket 36 are located outside the roller chain 33 and roller sprocket 32. In specific applications, the gravity roller 3 is located within the film conveying area (such as a closed peeling chamber). This arrangement allows the gravity roller counterweight mechanism 38 to be located on the outer side of the peeling chamber sidewall, creating an operating space that facilitates the adjustment of the gravity roller counterweight mechanism 38 by the operator.

[0061] In some embodiments, the gravity roller counterweight mechanism 38 is, for example, a weight, and the gravity applied by the gravity roller counterweight mechanism 38 can be changed by replacing the weight with one of different masses. In a preferred embodiment, the gravity roller counterweight mechanism 38 has a detachable gravity roller counterweight, which is, for example, a weight (weight), and can be installed / removed as needed to adjust the mass; or other replaceable / adjustable counterweight methods can be used.

[0062] The working principle of the gravity roller assembly in this scheme is as follows: The roller sprocket 32 ​​and the counterweight sprocket 36 can only rotate synchronously. When the gravity roller counterweight mechanism 38 moves downward, the gravity roller 3 moves upward. The initial weight of the gravity roller is fixed. In the initial state, the roller is at the lower end. After the film is stretched, under the action of tension, the roller moves upward, and the gravity roller counterweight mechanism 38 moves downward; thus, it can be adjusted to the required force balance state.

[0063] It is conceivable that the gravity roller counterweight mechanism is not limited to this. For example, in some other embodiments, the gravity roller counterweight mechanism can also be selected as a hydraulic cylinder or a pneumatic cylinder, which is equivalent to replacing the gravity of the gravity roller counterweight mechanism 38 in the aforementioned embodiments with the force output by the hydraulic cylinder or the pneumatic cylinder.

[0064] Preferably, the gravity roller assembly also includes a displacement detection mechanism connected to the gravity roller counterweight mechanism 38, the gravity roller 3, or the synchronous transmission mechanism. This displacement detection mechanism is used to directly or indirectly detect the displacement of the gravity roller 3. In an ideal working state of force balance, the position of the gravity roller 3 is basically stationary. However, in actual production applications, there may be sudden changes in tension, such as uneven film thickness, which causes changes in the film thickness below the gravity roller 3. The constant force acting on films of different thicknesses results in different amounts of stretching, which manifests as the position of the gravity roller 3 fluctuating up and down. The displacement detection mechanism monitors the distance of this up and down fluctuation to understand the process conditions and further enables manual or automatic adjustment of the gravity roller counterweight mechanism 38.

[0065] Specifically, for example, the displacement detection mechanism is a wire encoder 39 or a displacement sensor. Taking the wire encoder 39 as an example, the main body of the wire encoder 39 is fixedly mounted on the frame, and the end of the wire of the wire encoder 39 is connected to the gravity roller counterweight mechanism 38, thereby measuring the distance the gravity roller counterweight mechanism 38 moves up and down. If the film is too thick or the tension is too high, the downward force provided by the gravity roller counterweight mechanism 38 is increased to control its upward movement distance; conversely, if the tension is too low, the downward force provided by the gravity roller counterweight mechanism 38 is reduced. The ideal state is that the roller is in the middle position, and the wire encoder 39 measures the distance, with the goal of adjusting the tension and conveying speed.

[0066] Please see Figure 10 , Figure 11Preferably, the system also includes two side pressure rollers 4, which are smaller rollers that assist in flattening the film edges and prevent the film edges from curling. The side pressure rollers 4 are located at the two side edges of the multi-roller system; in other words, they are mounted on the frame of the multi-roller system and located at both ends of the length direction of the other rollers, corresponding to the edges in the width direction of the film. The side pressure rollers 4 are located beside the film transport path, above and / or below the film transport path, with a gap between them (not in contact with the ideal film transport path). Unlike other rollers, the side pressure rollers 4 are shorter, do not extend from the left frame to the right frame, and are not greater than the width of the film; they are only located on both sides of the film. More specifically, preferably, two side pressure rollers 4 are grouped together and correspondingly located at the two side edges of the film; multiple groups of side pressure rollers 4 are arranged along the film transport path; the position of the side pressure rollers 4 is located between adjacent rollers in the multi-roller system. The pressure rollers 4 on both sides can be positioned between rollers that are relatively far apart in the roller assembly, such as between two adjacent guide rollers 6, between the traction roller 2 and an adjacent guide roller 6, between the gravity roller 3 and an adjacent guide roller 6, etc. The specific positions can be configured as needed. The pressure rollers 4 on both sides do not change the film conveying path and do not exert pressure on the film. They are only positioned on the side of the film conveying path, do not have driving components, and are driven rollers. When the film edge lifts up, the pressure rollers 4 on both sides can press down the lifted part, helping to restore the film to the ideal position and preventing the film edge from lifting up too much and causing folding, curling, or wrinkling.

[0067] Preferably, the two pressure rollers 4 are positionably mounted on the multi-roller system frame. For example, the two pressure rollers 4 include a pressure roller base 41, a pressure roller track frame 42, and a pressure roller positioning part 43 connected in sequence. The pressure roller positioning part 43 is rotatably connected to the pressure roller roller (i.e., the body of the two pressure rollers 4) via, for example, bearings. The pressure roller track frame 42 has a strip track, and the pressure roller positioning part 43 is adjustablely mounted on the strip track via a track locking mechanism. One end of the pressure roller track frame 42 in the length direction of the strip track is rotatably connected to the pressure roller base 41, for example, by being sleeved on a fixed shaft, and a shaft locking mechanism is provided. The pressure roller base 41 is fixedly connected to the multi-roller system frame. Thus, the pressure roller track frame 42 can be rotated to adjust the angle, and the body of the two pressure rollers 4 can also be adjusted in the length direction of the pressure roller track frame 42. This achieves an adjustable position for the two pressure rollers 4, making the application more flexible, reducing the precision requirements of the mounting holes on the frame, and making it easier to apply in practice. More specifically, the track locking mechanism is, for example, a screw-on nut. The end of the pressure roller positioning part 43 is a bolt segment with a diameter smaller than the rest. This bolt segment passes through the strip track (hole) on the pressure roller track frame 42, and then the nut is installed at the end of the bolt segment to clamp and position the pressure roller positioning part 43. The shaft locking mechanism is, for example, a set screw or a damping structure. It is understood that there are many ways to adjust the position, especially for the two pressure rollers 4 that will not be subjected to large forces; this utility model is not limited to the solution of the above specific embodiment. Optionally, the other rollers are also installed in an adjustable position. Optionally, the two pressure rollers 4 are located above or below the film conveying path, or as... Figure 11 As shown, the two pressure rollers are mounted on the same pressure roller track frame 42, located on the upper and lower sides of the film conveying path.

[0068] Please see Figures 12 to 14 It also includes a flame-retardant roller assembly 5. Preferably, the flame-retardant roller assembly 5 is located downstream of the gravity roller assembly. The flame-retardant roller assembly 5 includes a flame-retardant pressure roller 51 and a flame-retardant guide roller 52. The conveyed film is located on the flame-retardant guide roller 52, and the flame-retardant pressure roller 51 is mounted on the balancing mechanism 53. Generally, both the flame-retardant guide roller 52 and the flame-retardant pressure roller 51 are driven rollers, not actively driven by a motor, but passively rotated under frictional force as the film is conveyed. The flame-retardant guide roller 52 is one of the guide rollers 6. The flame-retardant pressure roller 51 and the flame-retardant guide roller 52 are adjacent, for example... Figure 12In the illustrated embodiment, the flame-retardant pressure roller 51 is located adjacent to and above the flame-retardant guide roller 52. Under normal conditions, the flame-retardant pressure roller 51 and the flame-retardant guide roller 52 are in a non-closed state (or open state), and the flame-retardant pressure roller 51 is not in contact with the film. In the event of a fire, the balancing mechanism 53 drives the flame-retardant pressure roller 51 and the flame-retardant guide roller 52 to close, so that the side of the film facing away from the flame-retardant guide roller 52 contacts the flame-retardant pressure roller 51 (the side of the film facing the flame-retardant guide roller 52 contacts the flame-retardant guide roller 52). Naturally, the outer surfaces of the flame-retardant pressure roller 51 and the flame-retardant guide roller 52 are made of flame-retardant material, such as existing flame-retardant rubber rollers, so that in the event of a fire, the film will be trapped between the flame-retardant pressure roller 51 and the flame-retardant guide roller 52, and the fire can be extinguished by the flame-retardant pressure roller 51.

[0069] This solution uses at least one guide roller in the multi-roller system as a flame-retardant guide roller 52, upon which a flame-retardant pressure roller 51 is mounted. The film is in relatively tight contact with the flame-retardant guide roller 52 for conveying, while the flame-retardant pressure roller 51 does not affect the conveying and is merely an additional component for fire extinguishing. This solution is particularly suitable for, for example, peeling chambers for polyimide films, where the film is a wet film containing a large amount of solvent. The solvent evaporating from the film forms flammable gas, which may ignite on the film surface in a high-temperature environment. The flame-retardant roller assembly in this solution is preferably located, for example, downstream of the multi-roller system in the peeling chamber, because the process temperature of the chamber connected downstream of the peeling chamber is usually higher. Optionally, in the event of a fire, under the action of the balancing mechanism 53, there is almost no pressure contact between the film and the flame-retardant pressure roller 51. In other words, the flame-retardant pressure roller 51 is close to a balanced state at the point where it just contacts the film, thus preventing the softer film (such as a wet film) from deforming due to pressure.

[0070] The flame-retardant pressure roller 51 has a flame-retardant roller central shaft and a flame-retardant roller cylinder. The flame-retardant roller cylinder is rotatably (e.g., via bearings) mounted on the flame-retardant roller central shaft, the two ends of which are fixedly connected to two balancing mechanisms 53 on both sides; or, the flame-retardant roller cylinder is fixedly connected to the flame-retardant roller central shaft, and the two ends of the flame-retardant roller central shaft are rotatably connected to the two balancing mechanisms 53 on both sides via, for example, bearings; thus, the outer surface of the flame-retardant pressure roller 51 in contact with the film can rotate. Furthermore, the flame-retardant pressure roller 51 is relatively long to accommodate wider films, and positioning at both ends of the roller ensures its stability. Similarly, the flame-retardant guide roller 52 has a flame-retardant guide roller central shaft and a flame-retardant guide roller cylinder; the flame-retardant guide roller cylinder is rotatably mounted on the flame-retardant guide roller central shaft, the two ends of which are connected to both sides of the frame; or, the flame-retardant guide roller cylinder is fixedly connected to the flame-retardant guide roller central shaft, and the two ends of the flame-retardant guide roller central shaft are rotatably connected to both sides of the frame.

[0071] In a preferred embodiment, the balancing mechanism 53 includes a set of swing arms 515, with a flame-retardant pressure roller 51 rotatably disposed between the swing arms 515. Specifically, both ends of the flame-retardant pressure roller 51 are connected to the two swing arms 515 respectively via, for example, bearing seats. A fixed rotating shaft 517 and a balancing adjustment mechanism 518 are also provided on the swing arms 515. The flame-retardant pressure roller 51 is positioned on one side of the working position of the flame-retardant guide roller 52 via the fixed rotating shaft 517. The working position is the working position where the flame-retardant pressure roller 51 and the flame-retardant guide roller 52 cooperate; or more specifically, the fixed rotating shaft 517 is rotatably connected to the frame, making the flame-retardant pressure roller 51 adjacent to the flame-retardant guide roller 52, for example, the flame-retardant pressure roller 51 is located above or diagonally above the flame-retardant guide roller 52. The balancing adjustment mechanism 518 is used to control the angular state of the swing arms 515, that is, the balancing adjustment mechanism 518 can realize the closing and opening of the flame-retardant pressure roller 51 and the flame-retardant guide roller 52.

[0072] More specifically, the set of swing arms 515 has a pressure roller fine-tuning device 54. On each swing arm 515, the pressure roller fine-tuning device 54 includes a push rod assembly 55 and a pressure roller push rod 56 fixedly connected to each other. The push rod assembly 55 is, for example, an annular bushing structure, fitted onto a fixed rotating shaft 517, and the push rod assembly 55 is keyed to the fixed rotating shaft 517 (e.g., Figure 13 In the middle, both the push rod assembly 55 and the fixed rotating shaft 517 have keyways (the structure shown in the black square is a key, more specifically, for example, a flat key), so that the angular positions of the push rod assembly 55 and the fixed rotating shaft 517 are relatively fixed.

[0073] One of the push rod assembly 55 and the swing arm 515 is provided with one or more angle fine-tuning slots 57, and the other is provided with a bolt fixing hole (or a bolt in other ways) corresponding to the angle fine-tuning slot 57. A fine-tuning positioning bolt is connected to the bolt fixing hole and passes through the angle fine-tuning slot 57. The angle fine-tuning slot 57 is, for example, three or four slots evenly arranged around the fixed pivot 517 along the circumference (more specifically, arc-shaped slots extending in the circumferential direction). The fine-tuning positioning bolt (in the untightened state) can move in the angle fine-tuning slot 57, so that the swing arm 515 and the push rod assembly 55 are rotatably connected through the fine-tuning positioning bolt and the angle fine-tuning slot 57 (during equipment maintenance and commissioning); after the position is determined, the fine-tuning positioning bolt can be tightened to ensure a stable connection.

[0074] The pressure roller top rod 56 extends along the length of the swing arm 515, is roughly parallel to the swing arm 515, and is positioned at the longitudinal center of the swing arm 515. Angle fine-tuning screws 58 are threaded to the upper and lower sides of the pressure roller top rod 56 along its length. The angle fine-tuning screws 58 can be fixed on the swing arm 515 to fine-tune and tighten the pressure roller top rod 56. During adjustment, one end is fixed while the other end is adjusted, thereby driving the swing arm 515 to rotate, thus adjusting the gap of the flame-retardant pressure roller 51. In other words, it is an adjustment of the relative angular position of the flame-retardant pressure roller 51 with the fixed rotating shaft 517 as the center. Specifically, the upper and lower angle fine-tuning screws 58 abut against and clamp the pressure roller top rod 56 in the middle. For example, if the upper angle fine-tuning screw 58 is turned down a certain distance and the lower angle fine-tuning screw 58 is turned down a certain distance, the angle between the relatively floating swing arm 515 and the pressure roller top rod 56, the top rod kit 55, the fixed rotating shaft 517 and other fixed components will change accordingly.

[0075] Please also refer to Figure 14 In an ideal configuration, the quadrilateral formed by the fixed rotating shaft 517, the flame-retardant pressure roller 51, and the two swing arms 515 lies in a single plane. The torsion of this quadrilateral can be adjusted by adjusting the angles of the swing arms 515 at both ends of the flame-retardant pressure roller 51 along its length. Furthermore, since the fixed rotating shaft 517 is connected to the fixed frame, this torsion is reflected in whether the two ends of the flame-retardant pressure roller 51 are parallel along its length. During equipment maintenance and debugging, the two ends of the flame-retardant pressure roller 51 are adjusted by adjusting the angle fine-tuning screw 58 to ensure that the flame-retardant pressure roller 51 is parallel to the flame-retardant guide roller 52, i.e., the gap width between the flame-retardant pressure roller 51 and the flame-retardant guide roller 52 is uniform, preventing a situation where one end of the flame-retardant pressure roller 51 contacts the film while the other end does not. In some embodiments, the two ends of the flame-retardant pressure roller 51 are adjustablely connected to the two swing arms 515 via bearing seats and a fine-tuning mechanism.

[0076] In a preferred embodiment, the balance adjustment mechanism 518 is a gravity-based adjustment mechanism, including a balance counterweight 519 slidably connected to the swing arm 515. The balance counterweight 519 can be driven to move towards the fixed shaft 517 via a counterweight drive device, thereby adjusting the center of gravity of the swing arm 515 and driving the flame-retardant pressure roller 51 and flame-retardant guide roller 52 to close. More specifically, the flame-retardant pressure roller 51 and the balance counterweight 519 are respectively located at both ends of the swing arm 515 (on both sides of the fixed shaft 517). For example, the fixed shaft 517 is located in the middle of the swing arm 515, the flame-retardant pressure roller 51 is located on one side of the fixed shaft 517, and the balance counterweight 519 is located on the other side of the fixed shaft 517. The fixed shaft 517 is connected to the frame. The closing and opening of the flame-retardant pressure roller 51 and the flame-retardant guide roller 52 are achieved by adjusting the balance counterweight 519.

[0077] For a typical, relatively long flame-retardant pressure roller 51, a balancing mechanism 53 is provided at both ends. The balancing counterweight 519 and the fixed rotating shaft 517 are preferably rod-shaped, arranged parallel to the flame-retardant pressure roller 51, and connected to the swing arms 515 on both sides. This makes the overall structure more stable, ensuring that the flame-retardant pressure roller 51 is, for example, horizontal, and will not accidentally tilt or wobble due to uneven force at both ends. Of course, the balancing counterweight 519 and / or the fixed rotating shaft 517 can also be individually provided on each swing arm 515. Preferably, in the balanced state, the height of the flame-retardant pressure roller 51 is lower than the balancing counterweight 519, and the swing arm 515 with one end of the flame-retardant pressure roller 51 slightly inclined downwards, which better maintains the flame-retardant pressure roller 51 in this balanced position, achieving the effect of gently pressing the film.

[0078] Preferably, the counterweight 519, the fixed rotating shaft 517 and / or the flame-retardant pressure roller 51 are connected to the swing arm 515 in an adjustable position, so as to facilitate flexible adjustment of the balance state of the flame-retardant pressure roller 51 according to the actual situation.

[0079] A preferred embodiment of the adjustable counterweight 519 (i.e., driven by a counterweight drive device) is as follows: One end of the swing arm 515 is provided with a sliding groove extending towards the fixed rotating shaft 517. The counterweight 519 is slidably connected within the sliding groove. The counterweight drive device is a counterweight adjustment bolt 520. The counterweight 519 has threaded holes at both ends, and the counterweight adjustment bolt 520 is threadedly connected to the counterweight 519. The counterweight adjustment bolt 520 is rotatably connected to the swing arm 515. The sliding direction of the counterweight 519 matches the length direction of the counterweight adjustment bolt 520, both being a direction from the end of the swing arm 515 towards the center. During adjustment, the counterweight adjustment bolt 520 rotates in its original position. Due to the cooperation of the thread and the sliding limit, the counterweight 519 can move along the sliding groove, thereby adjusting the torque on the counterweight side; for example, moving the counterweight 519 from the end towards the center causes the flame-retardant pressure roller 51 to change from an open state to a closed state. Alternatively, as an alternative, the counterweight adjusting bolt 520 can be rotatably connected to the counterweight 519, and the counterweight adjusting bolt 520 can be threadedly connected to the swing arm 515, achieving a similar technical effect. Further optionally, the counterweight adjusting bolt 520 can be connected to an electric drive device to control its rotation, thereby enabling wired control, remote control, or automatic control.

[0080] It is understood that the balance adjustment mechanism 518 is not limited to the above embodiments. For example, in some embodiments, the balance adjustment mechanism 518 is a cylinder or hydraulic cylinder disposed at the end of the balance mechanism 53 away from the flame-retardant guide roller 52. In other embodiments, the balance adjustment mechanism 518 is a drive motor connected to the fixed rotating shaft 517 and used to directly adjust the angle of the fixed rotating shaft 517; this can achieve, for example, remote or automatic control. In still other embodiments, the weight of the balance counterweight 519 can be adjusted, for example, by replacing different balance counterweights 519 or adding or removing weights from a balance counterweight 519.

[0081] As a supplementary explanation, in various embodiments, there are three connection methods between the fixed rotating shaft 517 and the swing arm 515: the first is that the fixed rotating shaft 517 is connected via, for example... Figure 13 The top rod assembly 55 and the pressure roller fine-tuning device are adjustablely and fixedly connected to the swing arm 515; the second type is that the fixed rotating shaft 517 is directly positioned or fixedly connected to the swing arm 515 by means of keys or bolts; in the above two embodiments, both ends of the fixed rotating shaft 517 are rotatably connected to the frame, for example, by bearing seats, so that the fixed rotating shaft 517 can rotate freely and rotate with the swing arm 515, or a motor is set at the outer end of the fixed rotating shaft 517 to directly control the rotation and stationary position of the fixed rotating shaft 517; the third type is that the fixed rotating shaft 517 and the swing arm 515 are rotatably connected, and the fixed rotating shaft 517 can be selected to be fixedly connected or rotatably connected to the frame, so that the swing arm 515 can rotate freely and is not affected by the rotation of the fixed rotating shaft 517. In this solution, the method of directly controlling the rotation of the fixed rotating shaft by the motor cannot be used, but the tilt angle can still be controlled by directly applying force to the swing arm 515 or by the balance of the swing arm 515's own counterweight.

[0082] Preferably, the device also includes a fixed limiting rod 521. A longitudinal limiting groove 522 (e.g., a strip-shaped or arc-shaped slot, which can be through or non-through, but preferably through the swing arm 515) is provided on the balancing mechanism 53 (e.g., on the swing arm 515). One end of the fixed limiting rod 521 is located at a fixed position (e.g., on the frame), and the other end is engaged within the longitudinal limiting groove 522. This limits the vertical movement of the balancing mechanism 53, preventing the flame-retardant pressure roller 51 from deviating excessively, and ensuring that the flame-retardant pressure roller 51 does not exert excessive force on the film, leading to deformation or other problems, even at its closest possible position to the flame-retardant guide roller 52. In other embodiments, methods such as a locking block, a stop bar, or other blocks / plates or pull ropes located at a defined position on the periphery of the swing arm 515 can be used to externally block the position of the swing arm 515, achieving the desired limiting effect. Specifically, for example, the fixed limit rod 521 is set at a fixed position (e.g., on the frame), and the fixed limit rod 521 is located above and / or below the outside of the balancing mechanism 53, in other words, with... Figure 13Unlike the embodiment shown, the balancing mechanism 53 does not have a longitudinal limiting groove 522. Instead, the limiting function is achieved by the edge of the balancing mechanism 53 cooperating with the fixed limiting rod 521.

Claims

1. A cast film release chamber, wherein the release chamber is a sealed box structure having at least a film inlet, an outlet, and a ventilation system, and the release chamber has a multi-roller system for conveying the film, characterized in that, A negative pressure air curtain device is provided at the film inlet of the stripping chamber. The negative pressure air curtain device includes a first exhaust section and a second exhaust section arranged opposite to each other. At least one flow equalization plate is provided in the first exhaust section and / or the second exhaust section. The first exhaust section and the second exhaust section are located on the upper and lower sides of the film conveying path, respectively. A channel space for the film to pass through is formed between the first exhaust section and the second exhaust section. The width of the channel space is adapted to the width of the film.

2. The film casting release chamber according to claim 1, characterized in that, In a multi-roller system, the distance between the lowest roller and the floor of the stripping chamber is greater than one meter.

3. The film casting release chamber according to claim 1, characterized in that, The entrance and / or exit of the passage space are equipped with an adjustable windbreak mechanism, which has space reserved to match the thickness of the membrane.

4. The cast film release chamber according to claim 1, characterized in that, A wind speed acquisition device is installed at the flow equalization plate, and a wind speed adjustment mechanism is connected to the outside of the first exhaust section and / or the second exhaust section.

5. The cast film release chamber according to claim 1, characterized in that, The flow equalization plates inside the first exhaust section and / or the second exhaust section are arranged in multiple layers. The multi-layer flow equalization plates are arranged parallel to the film conveying direction or inclined to the film conveying direction. The flow equalization plates have a number of air holes or a number of slit holes. The air holes or slit holes in each layer are arranged opposite to each other or staggered.

6. The cast film release chamber according to any one of claims 1-5, characterized in that, Near the film inlet, the multi-roller system has multiple guide rollers arranged side by side to form a cooling and conveying section for the film; the peeling chamber is equipped with an air supply mechanism, and the air supply mechanism is equipped with an air filter device.

7. The cast film release chamber according to any one of claims 1-5, characterized in that, The multi-roll system includes guide rollers, traction rollers, and gravity rollers mounted on the multi-roll system frame; The guide roller is a driven roller, and multiple guide rollers are distributed along the film conveying direction in a multi-roller system; The stripping roller is located upstream of the stripping chamber, and the traction roller is located downstream of the stripping roller. One or more guide rollers are spaced between the traction roller and the stripping roller. The traction roller includes two adjacent active rollers. The film conveying path is S-shaped at the traction roller. The gravity roller is located downstream of the traction roller and is a driven roller. There are adjacent guide rollers on both the upstream and downstream sides of the gravity roller. The height of the gravity roller is lower than that of the guide rollers on both sides of the gravity roller. The gravity roller is movable and connected to a tension control mechanism.

8. The cast film release chamber according to claim 7, characterized in that, It also includes two pressure rollers, which are located at the two side edges of the multi-roller system. The two pressure rollers are located on the upper and / or lower side of the film conveying path, and there is a gap between the two pressure rollers and the film conveying path.

9. The cast film release chamber according to claim 7, characterized in that, It also includes a flame-retardant roller assembly, which includes a flame-retardant pressure roller and a flame-retardant guide roller. The flame-retardant pressure roller is set on the balancing mechanism, and the flame-retardant guide roller is one of the guide rollers. Under normal conditions, the flame-retardant pressure roller and the flame-retardant guide roller are in a non-closed state. In the event of a fire, the balancing mechanism drives the flame-retardant pressure roller and the flame-retardant guide roller to close.

10. The cast film release chamber according to claim 9, characterized in that, The balancing mechanism includes a set of swing arms, with flame-retardant pressure rollers positioned between the swing arms. The swing arms are also equipped with a fixed rotating shaft and a balancing adjustment mechanism. The flame-retardant pressure rollers are positioned on one side of the flame-retardant guide rollers via the fixed rotating shafts. The balancing adjustment mechanism enables the closing and opening of the flame-retardant pressure rollers and the flame-retardant guide rollers.

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