A multi-roll system after the cast film is stripped and a stripping chamber with the same

Abstract

The application discloses a multi-roller system after a cast film is stripped and a stripping chamber with the same, wherein the multi-roller system comprises guide rollers, traction rollers and gravity rollers arranged on a rack of the multi-roller system; the traction rollers are located on a downstream side of the stripping rollers, and one or more guide rollers are arranged between the traction rollers and the stripping rollers; the traction rollers comprise two driving rollers arranged adjacently, and a film conveying path is in an S-shaped structure at the traction rollers; the gravity rollers are located on a downstream side of the traction rollers, and the gravity rollers and a counterweight mechanism of the gravity rollers are arranged on the same closed chain or are arranged on two closed chains respectively through a synchronous transmission mechanism. The scheme avoids problems such as generation of embossing and influence on film thickness, and provides constant tension through gravity or other ways, realizes adjustment of the tension and micro longitudinal stretching, and thus improves the film quality. A negative pressure air curtain device is preferably arranged in the stripping chamber, and process environment control stability and system safety are significantly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of film manufacturing equipment, and particularly relates to a multi-roller system after the casting film is peeled off and a peeling chamber with the same. BACKGROUND

[0002] At present, in the casting production line of, for example, polyimide film, a peeling roller is arranged after a steel belt casting machine to peel off the preliminarily hardened film from the steel belt, and then the film is transported by a multi-roller system, at this time, the film is a wet film containing a large amount of solvent, and the film is further hardened and the tension is adjusted during the transportation of the multi-roller system in the peeling chamber after peeling. The existing multi-roller system disclosed in, for example, the Chinese Utility Model Patent with the authorization announcement number CN217908659U is generally used to support and transport the film by a plurality of rollers, but the conventional scheme does not consider the special case of the wet film, for example, the conventional compression roller structure is used, which can cause a certain deformation of the film surface and affect the film quality. Especially for high-end films, the film surface quality and uniformity have higher requirements, and the existing multi-roller system is difficult to meet the use needs. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a multi-roller system after the casting film is peeled off and a peeling chamber with the same, to solve the problem of poor film quality after the processing of the prior art scheme, and to realize a more suitable wet film transportation mode through the improvement of the roller system, so that the film surface quality and uniformity can better meet the current high-end process requirements.

[0004] According to the technical scheme of the present application, the present application provides a multi-roller system after the casting film is peeled off, which comprises a guide roller, a traction roller and a gravity roller arranged on a multi-roller system frame. The guide roller is a driven roller. The traction roller is located on the downstream side of the peeling roller, and one or more guide rollers are arranged between the traction roller and the peeling roller. The traction roller comprises two adjacent driving rollers, and the film transportation path is in an S-shaped structure at the traction roller. The gravity roller is located on the downstream side of the traction roller, and one or more guide rollers are arranged between the gravity roller and the traction roller. The gravity roller is a driven roller, and the upstream side and the downstream side of the gravity roller are adjacent to the guide rollers. The height position of the gravity roller is lower than that of the guide rollers on both sides. The gravity roller and the gravity roller counterweight mechanism are arranged on the same closed chain or are arranged on two closed chains through a synchronous transmission mechanism.

[0005] Further, the closed chain comprises a roller chain and a counterweight chain, the gravity roller and the gravity roller counterweight mechanism are arranged on the roller chain and the counterweight chain respectively; the roller chain is arranged in a vertical annular shape, and the roller chain is drivingly connected to the roller chain wheels at the upper and lower ends of the roller chain; the floating block is connected to the roller chain; the gravity roller is rotatably connected to the floating block; the synchronous transmission mechanism comprises a gravity roller synchronous shaft, the upper and / or lower roller chain wheels are coaxially connected to the counterweight chain wheels through the gravity roller synchronous shaft, and the counterweight chain wheels are drivingly connected to the counterweight chain; the counterweight chain is arranged in a vertical annular shape, and the counterweight chain is connected to the gravity roller counterweight mechanism; the roller chain wheels and the counterweight chain wheels are rotatably arranged on the rack.

[0006] Further, two edge rollers are arranged at the two side edges of the multi-roller system, and the two edge rollers are located on the upper side and / or the lower side of the film conveying path and have a gap between the two edge rollers and the film conveying path.

[0007] Further, the two edge rollers are a group and are located at the two side edges of the film; the two edge rollers are a plurality of groups and are arranged along the film conveying path; the two edge rollers are located between adjacent rollers in the multi-roller system.

[0008] Further, the two edge rollers comprise a roller base, a roller track frame and a roller positioning part connected in sequence; the roller positioning part is rotatably connected to the roller cylinder; the roller track frame has a strip-shaped track, and the roller positioning part is adjustably arranged on the strip-shaped track through a track locking mechanism; one end of the roller track frame in the length direction of the strip-shaped track is rotatably connected to the roller base and is provided with a rotating shaft locking mechanism; and the roller base is fixedly connected to the rack of the multi-roller system.

[0009] Further, the fire-retardant roller assembly comprises a fire-retardant compression roller and a fire-retardant guide roller, the fire-retardant compression roller is arranged on the balance mechanism, and the fire-retardant guide roller is one of the guide rollers; in a normal state, the fire-retardant compression roller and the fire-retardant guide roller are in a non-closed state, and in a fire state, the balance mechanism drives the fire-retardant compression roller to close with the fire-retardant guide roller.

[0010] Further, the balance mechanism comprises a group of swing arms, the fire-retardant compression roller is arranged between the swing arms, the swing arms are further provided with a fixed rotating shaft and a balance adjusting mechanism, the fire-retardant compression roller is arranged on one side of the working position of the fire-retardant guide roller through the fixed rotating shaft, and the balance adjusting mechanism is used to realize the closing and opening of the fire-retardant compression roller and the fire-retardant guide roller.

[0011] Further, at least three guide rollers are arranged between the traction roller and the stripping roller to form a cooling conveying section.

[0012] According to the technical scheme of the application, the application further provides a cast film stripping chamber, which is a sealed box structure having at least a film inlet, an outlet and a ventilation system, and has the multi-roller system for the stripped cast film as described in the application.

[0013] Further, a negative pressure air curtain device is arranged at the film inlet of the stripping chamber, which comprises oppositely arranged first and second air extraction parts, at least one flow uniformizing plate is arranged in the first and / or second air extraction part, the first and second air extraction parts are respectively arranged on the upper and lower sides of the film conveying path, and a channel space for the film to pass through is formed between the first and second air extraction parts, and the width of the channel space is adapted to the width of the film.

[0014] Compared with the prior art, the application has the following beneficial technical effects:

[0015] In the multi-roller system for the stripped cast film, both of the two traction rollers are driving rollers, the path of the film is S-shaped around the two traction rollers, which functions to increase the wrap angle and realize the tension blocking effect; the prior art usually uses a pressure roller to block the front and rear tensions during the film conveying process, but since the film here is a wet film containing a large amount of solvent, the use of a pressure roller will cause embossing and affect the film thickness, therefore, this special traction roller structure is designed; and, a gravity roller is arranged behind the traction roller, which provides constant tension by gravity or other means to realize the adjustment of the tension and the micro longitudinal stretching; in this way, the film quality is improved. More preferably, two edge pressing wheels are further arranged to assist in flattening the edges of the film and prevent the film edges from curling; and a fire-retardant roller assembly is arranged to gently press on the film in a micro-pressure state without affecting the flatness and thickness of the film surface, and can realize the fire extinguishing effect when the film catches fire. In addition, the stripping chamber of the application further preferably has a negative pressure air curtain device, which can more effectively prevent the solvent gas from escaping, and significantly improves the process environment control stability and system safety. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of a multi-roller system provided by the application.

[0017] Figure 2 is Figure 1 is a left view schematic diagram of the structure shown in

[0018] Figure 3 is a schematic diagram of the overall structure of a multi-roller system provided by the application.

[0019] Figure 4 is a schematic diagram of the overall structure of a multi-roller system provided by the application.

[0020] Figure 5 isFigure 4 Fig. 1 is a front view of a schematic diagram of a gravity roller assembly according to the present application.

[0021] Figure 6 Fig. 2 is a left view of a schematic diagram of a gravity roller assembly according to the present application. Figure 4

[0022] Figure 7a Fig. 3 is a force analysis schematic diagram of two embodiments of a gravity roller assembly according to the present application. Figure 7b

[0023] Figure 8 Fig. 4 is a schematic diagram of a structure of a fire-retardant roller assembly according to the present application.

[0024] Figure 9 Fig. 5 is a sectional view of a schematic diagram of a part of the fire-retardant roller assembly according to the present application. Figure 8

[0025] Fig. 6 is a perspective view of a schematic diagram of the structure according to the present application. Figure 10 Figure 9 Fig. 7 is a partial sectional view of a schematic diagram of a fine adjustment device of a roller according to the present application.

[0026] Figure 11 Fig. 8 is a perspective view of a schematic diagram of an adjustment plate in the structure according to the present application.

[0027] Figure 12a Figure 11 Fig. 9 is a perspective view of a schematic diagram of a part of the structure according to the present application.

[0028] Figure 12b Fig. 10 is a schematic diagram of a structure of an adjustment plate on the opposite side of the adjustment plate according to the present application. Figure 12a

[0029] Fig. 11 is a perspective view of a schematic diagram of a part of the structure according to the present application. Figure 13 Figure 11 Fig. 12 is a sectional view of a schematic diagram of a peeling chamber according to the present application.

[0030] Figure 14 Fig. 13 is a perspective view of a schematic diagram of the peeling chamber according to the present application.

[0031] Figure 15 Fig. 14 is a schematic diagram of a structure of a negative pressure air curtain device according to the present application.

[0032] Figure 16 Fig. 15 is a perspective view of a schematic diagram of the negative pressure air curtain device according to the present application.

[0033] Figure 17 Fig. 16 is a rear view of a schematic diagram of the negative pressure air curtain device according to the present application.

[0034] Figure 18 Figure 17 Fig. 17 is a schematic diagram of a structure of a negative pressure air curtain device according to the present application.

[0035] Figure 19 Fig. 18 is a schematic diagram of a structure of a negative pressure air curtain device according to the present application.​​​​​​Figure 17 Left view schematic diagram of the negative pressure air curtain device.

[0036] Explanation of reference numerals in the drawings:

[0037] 1. Guide roller;

[0038] 2. Pulling roller;

[0039] 3. Gravity roller; 31, gravity roller sliding rail; 32, roller sprocket; 33, roller chain; 34, floating block; 35, gravity roller synchronous shaft; 36, counterweight sprocket; 37, counterweight chain; 38, gravity roller counterweight mechanism; 39, wire encoder;

[0040] 4. Two edge pinch rollers; 41, pinch roller base; 42, pinch roller rail frame; 43, pinch roller positioning part;

[0041] 5. Flame-retardant roller assembly; 51, flame-retardant pinch roller; 52, flame-retardant guide roller; 53, balancing mechanism; 54, pinch roller fine adjustment device; 55, top rod kit; 56, pinch roller top rod; 57, angle fine adjustment slot hole; 58, angle fine adjustment screw; 59, adjustment plate; 510, strip-shaped limiting groove; 511, auxiliary positioning strip-shaped hole; 512, through hole; 513, pin shaft; 514, position fine adjustment screw; 515, swing arm; 516, bearing seat; 517, fixed rotating shaft; 518, balancing adjustment mechanism; 519, balancing counterweight; 520, counterweight adjustment bolt; 521, fixed limiting rod; 522, longitudinal limiting groove;

[0042] 6. Peeling roller;

[0043] 7. Negative pressure air curtain device; 71, first air extraction part; 72, second air extraction part; 73, flow equalizing plate; 74, passage space; 75, passage side plate; 76, slit baffle; 77, first airtight bellows; 78, second airtight bellows; 79, first air extraction pipe; 710, second air extraction pipe; 711, wind speed acquisition device; 712, wind speed adjustment mechanism. DETAILED DESCRIPTION

[0044] The present application provides a multi-roller system after the peeling of a cast film and a peeling chamber with the same, solves the problem of poor film quality after the processing of the prior art solution, and realizes a more suitable wet film conveying mode through the improvement of the roller system, so that the film surface quality and uniformity better meet the current high-end process requirements.

[0045] Please refer to Figure 1 The multi-roller system after the peeling of a cast film according to an embodiment of the present application comprises a guide roller 1, a pulling roller 2 and a gravity roller 3 arranged on a multi-roller system rack. Figure 2As shown, generally, each roller is horizontally arranged and has a length adapted to the width of the film, and each roller is connected to the frame of the multi-roller system at both ends in the length direction directly or indirectly to ensure stability, the axis of the roller is fixed or floating, and the roller can rotate around the axis. The basic structure of the roller and the frame is known in the art and will not be described in detail.

[0046] The guide roller 1 is a driven roller and is fixedly arranged on the frame of the multi-roller system, and is usually a plurality of rollers arranged from the input end to the output end. The film is pulled by the driving roller in the multi-roller system, and the film is attached to the guide roller 1, which is driven to rotate passively by the film, thereby transporting the film along a set path. More specifically, the guide roller 1 is connected to the frame at both ends through the guide roller fine adjustment mechanism, so that the ends of the guide roller 1 can be adjusted to be flush, and the rollers are parallel to each other.

[0047] The pulling roller 2 is located on the downstream side of the stripping roller 6, and one or more (for example, six) guide rollers 1 are arranged between the pulling roller 2 and the stripping roller 6. The pulling roller 2 includes two adjacent driving rollers, and the film transport path at the pulling roller 2 is S-shaped. Figure 1 For example, the upstream roller of the two driving rollers of the pulling roller 2 is located obliquely above the downstream roller, so that the S-shaped film at the pulling roller 2 has a large wrap angle between the one row of guide rollers 1; in addition, both of the pulling rollers 2 are driving rollers, so that the tension isolation effect is achieved, that is, the tension conditions on the upstream side and the downstream side of the pulling roller 2 are independent. Figure 1 In the structure shown, the stripping roller 6 and the pulling roller 2 are driving rollers, and the rest are driven rollers (except for the leftmost steel belt casting machine driving drum, which is not included in the multi-roller system). Figure 1

[0048] It should be noted that in the existing multi-roller system, one pulling roller and one compression roller are usually used to achieve the tension isolation effect, but for the casting film stripping chamber, the film here is a wet film containing a large amount of solvent, and if a compression roller is used, it will cause embossing and affect the film thickness, etc., and the special pulling roller structure designed in the present application can avoid the problem of deformation under pressure.

[0049] In some embodiments, at least three (for example, four to six) guide rollers 1 are arranged between the pulling roller 2 and the stripping roller 6 to form a cooling transport section. The cooling transport section is formed by the guide rollers 1 to a certain length, which functions to reduce the temperature of the film after transport to, for example, 30-40°C; the arrangement of the guide rollers 1 also needs to ensure the angle of the wrap angle, for example, about 30°, and according to the angle requirement, the arrangement, number and spacing of the guide rollers 1 are determined. More specifically, the stripping chamber (especially the upper part of the cooling transport section) has an air supply mechanism to supply clean air at, for example, room temperature into the stripping chamber to maintain the required low temperature of the cooling transport section.

[0050] ​The gravity roller 3 is located on the downstream side of the traction roller 2, and one or more (one in the figure) Figure 1 The gravity roller 3 is a driven roller, and the upstream side and the downstream side of the gravity roller 3 are adjacent to a guide roller 1, the height position of the gravity roller 3 is lower than the guide rollers 1 on both sides, and the position of the gravity roller 3 is movably arranged. The function of the gravity roller 3 is to adjust the tension, and can also be used for micro longitudinal stretching, the main principle of which is to provide a constant tension by gravity or other means; for the vertically movable gravity roller 3, the gravity roller 3 pulls and stretches the film downward with a constant tension; and the constant tension can be adjusted.

[0051] Please refer to Figures 4 to 6 , the gravity roller assembly includes a gravity roller 3 and a gravity roller counterweight mechanism 38, which are arranged on the same closed chain, or 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, and there is a larger spacing distance in space, while still having a synchronous transmission relationship). The closed chain is a ring chain, which can rotate on the ring path, and the closed chain forms a structure similar to a fixed pulley (or a lever structure), and then the gravity roller 3 and the gravity roller counterweight mechanism 38 exist on the same side and the opposite side of the fulcrum of the lever structure.

[0052] As shown in Figure 7a , when the gravity roller 3 and the gravity roller counterweight mechanism 38 are located on the ascending side and the descending side of the closed chain respectively, the sum of the film tension F and the counterweight tension G1 of the gravity roller counterweight mechanism is balanced with the gravity G2 of the gravity roller, that is, the system resultant force F+G1-G2=0, so F=G2-G1.

[0053] As shown in Figure 7b , 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 tension G1 and the gravity G2 of the gravity roller is balanced with the film tension F, that is, the system resultant force F-G1-G2=0, so F=G1+G2.

[0054] 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 vertically arranged in a ring shape, and the closed chain is drivingly connected to the sprocket at the upper and lower ends thereof; the closed chain is connected with a floating block 34 and a gravity roller counterweight mechanism, and the gravity roller 3 is rotatably connected to the floating block 34.

[0055] In some other preferred embodiments, the closed chain includes a roller chain 33 and a counterweight chain 37, and the gravity roller 3 and the gravity roller counterweight mechanism 38 are arranged on the roller chain 33 and the counterweight chain 37 respectively. The roller chain 33 is vertically arranged in a ring shape, and the roller chain 33 is drivingly connected to the roller sprocket 32 at the upper and lower ends thereof. The roller chain 33 is connected with a floating block 34, 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 the upper and / or lower roller sprocket 32 is coaxially connected with a counterweight sprocket 36 through the gravity roller synchronous shaft 35, and the counterweight sprocket 36 is drivingly connected to the counterweight chain 37. The counterweight chain 37 is vertically arranged in a ring shape, and the counterweight chain 37 is connected with the gravity roller counterweight mechanism 38.

[0056] Preferably, a gravity roller slide rail 31 vertically arranged on the frame is further included, and the floating block 34 is slidingly connected with the gravity roller slide rail 31 in a matching manner, thereby limiting the gravity roller 3 to move only up and down and ensuring smooth up and down movement. It can be understood that the gravity roller slide rail 31 can be used for auxiliary limiting for the schemes that the gravity roller 3 and the gravity roller counterweight mechanism 38 are arranged on the same closed chain or different closed chains.

[0057] Specifically in the illustrated embodiments, the gravity roller slide rail 31 is arranged on the frame of the multi-roller system, and the upper and lower roller sprockets 32 are arranged at (near) the upper and lower ends of the gravity roller slide rail 31 and are drivingly connected with the roller chain 33. The roller chain 33 is in a ring shape and has the floating block 34 on a straight line segment of one side thereof. The floating block 34 is rotatably connected with the gravity roller 3, for example, through a bearing block, so that the gravity roller 3 can rotate around its own central axis and the position of the central axis can move up and down together with the floating block 34.

[0058] Preferably, only the upper roller sprocket 32 is coaxially connected with the counterweight sprocket 36 through the gravity roller synchronous shaft 35, and the counterweight sprockets 36 are preferably two (a group) distributed above and below and corresponding to each other, wherein the upper counterweight sprocket corresponds to the position of the upper roller sprocket and is coaxially connected through the gravity roller synchronous shaft 35, and the lower counterweight sprocket corresponds to the position of the lower roller sprocket. The gravity roller synchronous shaft 35 located above can better play the role of a fixed pulley, and the shapes and positions of the roller chain 33 and the counterweight chain 37 correspond to each other, which helps to make the synchronous transmission more stable. In some other embodiments, the upper and lower both have the gravity roller synchronous shaft 35.

[0059] In the present embodiments, the gravity roller counterweight mechanism 38 and the floating block 34 are located on different sides of the ring shape of the counterweight chain 37 and the roller chain 33. Among them, "different sides" is in relation to the two straight line segments (i.e. the "upward side" and the "downward side" opposite to each other) in the ring chain structure, such as Figure 6As the longitudinal stretching tension required by the film is usually not large, the gravity of the gravity roller 3 can be "lightened" by the gravity roller counterweight mechanism 38 to achieve the required constant tension effect; of course, for cases where the required tension is large, the gravity roller counterweight mechanism 38 can be arranged on the same side of the floating block 34 and the gravity roller 3.

[0060] More specifically, as the length of the roller barrel of the gravity roller 3 is usually longer than the width of the film, the two ends of the length direction of the gravity roller 3 are respectively connected to the two floating blocks 34; and in the length direction of the gravity roller 3, the gravity roller assembly has a mirror-symmetrical structure relative to the midpoint of the length of the gravity roller 3. Among them, the mirror symmetry includes the consistency of the floating blocks 34 and the gravity roller counterweight mechanism 38 on both sides (including, for example, the consistency of the mass, the symmetry of the position, etc.), in other words, the same and symmetrical structure is adopted for the two ends of the gravity roller 3, so that the force conditions of the two ends of the gravity roller 3 are consistent and the positions are aligned, thereby enabling uniform stretching of the film. Further preferably, the two (upper) roller barrel sprockets 32 and the counterweight sprocket 36 (a total of four sprockets) are coaxially connected by a gravity roller synchronous shaft 35, and the structure is more stable and simple.

[0061] Preferably, the counterweight chain 37 and the counterweight sprocket 36 are located outside the roller barrel chain 33 and the roller barrel sprocket 32. In specific applications, the gravity roller 3 is located in the film conveying area (such as a closed stripping chamber), and such arrangement can make the gravity roller counterweight mechanism 38 located outside the side wall of the stripping chamber to form an operation space, facilitating the adjustment of the gravity roller counterweight mechanism 38 by the staff.

[0062] 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 weights of different masses. In preferred embodiments, the gravity roller counterweight mechanism 38 has a detachable gravity roller counterweight, which is, for example, a weight (incremental weight), and the mass can be adjusted by mounting / dismounting it as needed; or other replaceable / adjustable counterweight methods can be used. Specifically, for example, the gravity roller counterweight mechanism 37 includes a transversely arranged incremental weight support (such as a circular tray), a vertical connecting rod is fixedly connected to the middle of the incremental weight support, the lower part of the incremental weight support and the upper part of the connecting rod are respectively connected with the counterweight chain 37 to form a ring, and an incremental weight is detachably placed on the incremental weight support, one side of the incremental weight has an opening and the connecting rod is located in the opening of the incremental weight; the incremental weight is, for example, a plurality of standard pieces in the form of circular plates / cakes, so that the total mass of the gravity roller counterweight mechanism 38 can be adjusted by increasing / decreasing. Further, a positioning nut is threadedly connected to the upper end of the connecting rod, and the positioning nut can be tightened to press the incremental weight below to prevent the incremental weight from falling out.

[0063] The working principle of the gravity roller assembly of the present application is as follows. The roller sprocket 32 and the counterweight sprocket 36 can only rotate synchronously, and the gravity roller counterweight mechanism 38 moves downward, and the gravity roller 3 moves upward. The initial weight of the gravity roller is fixed, and the roller is in the initial state at the lower end. After the film is pulled, the roller moves upward under the action of tension, and the gravity roller counterweight mechanism 38 moves downward. Further, as shown in Figure 7a According to the foregoing force analysis, the force balance state can be adjusted as required.

[0064] It is conceivable that the gravity roller counterweight mechanism is not limited to this, for example, in other embodiments, the gravity roller counterweight mechanism can also be selected as a hydraulic cylinder or an air cylinder, etc., which is equivalent to replacing the gravity of the gravity roller counterweight mechanism 38 in the foregoing embodiment with the output force of the hydraulic cylinder or the air cylinder.

[0065] Preferably, a displacement detection device is further included, which is arranged on the gravity roller or the gravity roller counterweight mechanism or the synchronous transmission mechanism; for example, the displacement detection device is located in the gravity roller assembly or on the downstream side of the gravity roller assembly. The displacement detection device is used to inform the system to adjust the rotating speed of the traction roller assembly after detecting the displacement change, so as to realize timely feedback or automatic adjustment of the system, so as to ensure the required tension effect. The displacement detection mechanism is, for example, a pull wire encoder 39 or a displacement sensor, which can directly or indirectly detect the displacement of the gravity roller 3. For example, the pull wire encoder 39 is arranged on the downstream side of the gravity roller assembly, and the pull wire encoder 39 is connected with the gravity roller counterweight mechanism 38, so as to measure the distance of the upward and downward movement of the gravity roller counterweight mechanism 38. Figure 7a As shown and in the ideal working state of force balance, the position of the gravity roller 3 is basically fixed; however, in actual production application, there can be a sudden change in tension, for example, the film thickness is not uniform, which causes the film thickness below the gravity roller 3 to change. The stretching amount formed by the constant force acting on the film of different thicknesses is different, which is reflected in the up-and-down floating of the position of the gravity roller 3. The displacement detection mechanism monitors the distance of the up-and-down floating offset, so as to understand the process situation, and further to realize manual adjustment or automatic adjustment of the gravity roller counterweight mechanism 38 accordingly.

[0066] More specifically, taking the pull wire encoder 39 as an example, the main part of the pull wire encoder 39 is fixedly arranged on the rack, and the pull wire end of the pull wire encoder 39 is connected with the gravity roller counterweight mechanism 38, so as to measure the distance of the upward and downward movement of the gravity roller counterweight mechanism 38. If the film is thick or the tension is too large, the downward force provided by the gravity roller counterweight mechanism 38 is increased to control the distance of the upward movement thereof. Conversely, if the tension is too small, the downward force provided by the gravity roller counterweight mechanism 38 is reduced. The most ideal state is that the roller is located at the middle position, and the pull wire encoder 39 measures the distance, and the target is to adjust the tension and conveying speed behind the traction roller assembly. It can be understood that in other embodiments, the displacement detection device can also be selected as a speed measuring device for measuring the film speed, etc., which can indirectly reflect the displacement situation.

[0067] Please refer toFigures 1 to 3 The two-side pressing wheels 4 are preferably smaller rollers, which serve to assist in flattening the edges of the film and prevent the edges of the film from curling. The two-side pressing wheels 4 are arranged at the two side edges of the multi-roller system, in other words, they are arranged on the frame of the multi-roller system and located at the two ends of the length direction of the other rollers, corresponding to the edges in the width direction of the film. The two-side pressing wheels 4 are located beside the film conveying path, and are located above and / or below the film conveying path, and have a gap (not in contact with the ideal film conveying path) between the two-side pressing wheels 4 and the film conveying path. Unlike the other rollers, the two-side pressing wheels 4 are shorter in length, do not extend from the left frame to the right frame, are not greater than the width of the film, but are only arranged on the two sides of the film. More specifically, preferably, the two two-side pressing wheels 4 on the left and right are a group, and are correspondingly located on the two side edges of the film; the two-side pressing wheels 4 are multiple groups, arranged along the film conveying path; the positions of the two-side pressing wheels 4 are located between adjacent two rollers in the multi-roller system. The positions of the two-side pressing wheels 4 can be selected to be arranged between rollers that are far apart in the roller assembly, for example, between adjacent two guide rollers 1, between the traction roller 2 and the adjacent guide roller 1, between the gravity roller 3 and the adjacent guide roller 1, etc., and the specific positions can be configured as needed. The two-side pressing wheels 4 do not change the film conveying path and do not have pressure on the film, and are only arranged on the side of the film conveying path, and do not have driving components and are driven rollers. When the edges of the film curl, the two-side pressing wheels 4 can press the curled part to assist the film to return to the ideal position, and prevent the edges of the film from curling too much and causing folding or curling wrinkles, etc.

[0068] Preferably, the two-side pressure roller 4 is adjustably arranged on the multi-roller system frame. For example, the two-side pressure roller 4 comprises 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 with the pressure roller cylinder (i.e. the two-side pressure roller 4 body) through, for example, a bearing. The pressure roller track frame 42 has a strip-shaped track, and the pressure roller positioning part 43 is adjustably arranged on the strip-shaped track through a track locking mechanism. The pressure roller track frame 42 is rotatably connected with the pressure roller base 41 at one end of the strip-shaped track length direction, for example, by sleeving on a fixed shaft, and is provided with a rotating shaft locking mechanism. The pressure roller base 41 is fixedly connected with the multi-roller system frame. Thus, the pressure roller track frame 42 can be adjusted in angle of rotation, and the two-side pressure roller 4 body can be adjusted in angle of rotation in the pressure roller track frame 42 length direction, so as to realize the adjustably arranged two-side pressure roller 4, to be more flexible in application, to reduce the precision requirement of the mounting hole on the frame, and to be easier for practical application. More specifically, the track locking mechanism is, for example, a screwable nut piece, and the end of the pressure roller positioning part 43 is a bolt segment with a smaller diameter than the rest of the part. The bolt segment is inserted into the strip-shaped track (hole) on the pressure roller track frame 42, and then the nut piece is installed at the end of the bolt segment to clamp and position the pressure roller positioning part 43. The rotating shaft locking mechanism is, for example, a jackscrew, or a damping structure, etc. It can be understood that there are many ways to adjustably arrange the position, especially for the two-side pressure roller 4 which will not be subjected to a large force; the present application is not limited to the above-mentioned specific embodiment. Optionally, the remaining rollers are also arranged in an adjustably arranged manner. Optionally, the two-side pressure roller 4 is located above or below the film conveying path, or as shown in Figure 3 , two pressure roller cylinders are mounted on the same pressure roller track frame 42 and located on the upper and lower sides of the film conveying path.

[0069] Please refer to Figure 1 , Figures 8 to 13 , the fire-retardant roller assembly 5 is also included. Preferably, the fire-retardant roller assembly 5 is located on the downstream side of the gravity roller assembly. The fire-retardant roller assembly 5 comprises a fire-retardant pressure roller 51 and a fire-retardant guide roller 52. The conveyed film is located on the fire-retardant guide roller 52, and the fire-retardant pressure roller 51 is arranged on a balancing mechanism 53. Generally, the fire-retardant guide roller 52 and the fire-retardant pressure roller 51 are both driven rollers, which are not actively driven to rotate by a motor, but are passively rotated under the action of friction as the film is conveyed. The fire-retardant guide roller 52 is one of the guide rollers 1. The fire-retardant pressure roller 51 and the fire-retardant guide roller 52 are adjacent, for example Figure 1In the shown embodiment, the fire-retardant pressure roller 51 is located adjacent to the fire-retardant guide roller 52. In normal state, the fire-retardant pressure roller 51 and the fire-retardant guide roller 52 are in non-closed state (or open state), the fire-retardant pressure roller 51 is not in contact with the film; in fire state, the balance mechanism 53 drives the fire-retardant pressure roller 51 and the fire-retardant guide roller 52 to be closed, the side of the film away from the fire-retardant guide roller 52 is in contact with the fire-retardant pressure roller 51 (the side of the film towards the fire-retardant guide roller 52 is in contact with the fire-retardant guide roller 52). Of course, the outer surface of the fire-retardant pressure roller 51 and the fire-retardant guide roller 52 is made of fire-retardant material, for example, the existing fire-retardant rubber roller, so that the film is clamped between the fire-retardant pressure roller 51 and the fire-retardant guide roller 52 when fire occurs, and the fire can be extinguished by the fire-retardant pressure roller 51.

[0070] In the present solution, at least one guide roller in the multi-roller system is used as the fire-retardant guide roller 52, and the fire-retardant pressure roller 51 is further arranged on the fire-retardant guide roller 52, so that the film is relatively tightly in contact with the fire-retardant guide roller 52 to achieve transmission and conveying, and the fire-retardant pressure roller 51 does not affect the conveying, and is only an additional component for achieving fire extinguishing. The present solution is particularly suitable for use in a stripping chamber of a film such as a polyimide film, in which the film is a wet film containing a large amount of solvent, and the solvent evaporated from the film forms flammable gas, which may catch fire on the surface of the film in an environment with high temperature; the fire-retardant roller assembly of the present solution is preferably arranged on the downstream side of the multi-roller system in the stripping chamber, because the process temperature in the chamber connected downstream of the stripping chamber is usually higher. Alternatively, in the fire state, the film is in almost pressureless contact with the fire-retardant pressure roller 51 under the action of the balance mechanism 53, in other words, the fire-retardant pressure roller 51 is in a state close to balance at the position where it is just in contact with the film, so that it will not cause deformation of the soft film (such as a wet film) due to pressure.

[0071] The fire-retardant pressure roller 51 has a fire-retardant roller shaft and a fire-retardant roller cylinder. The fire-retardant roller cylinder is rotatably (for example, through a bearing) sleeved on the fire-retardant roller shaft, and the two ends of the fire-retardant roller shaft are fixedly connected with the two balance mechanisms 53 on the two sides; alternatively, the fire-retardant roller cylinder is fixedly connected with the fire-retardant roller shaft, and the two ends of the fire-retardant roller shaft are rotatably connected with the two balance mechanisms 53 on the two sides through, for example, a bearing; in this way, the outer side of the fire-retardant pressure roller 51 in contact with the film can rotate. In addition, the fire-retardant pressure roller 51 is relatively long to be suitable for a relatively wide film, and positioning at both ends of the roller can ensure the stability of the roller. Similarly, the fire-retardant guide roller 52 has a fire-retardant guide roller shaft and a fire-retardant guide roller cylinder; the fire-retardant guide roller cylinder is rotatably sleeved on the fire-retardant guide roller shaft, and the two ends of the fire-retardant guide roller shaft are connected with the two sides of the frame; alternatively, the fire-retardant guide roller cylinder is fixedly connected with the fire-retardant guide roller shaft, and the two ends of the fire-retardant guide roller shaft are rotatably connected with the two sides of the frame.

[0072] In the preferred embodiment, the balancing mechanism 53 comprises a set of swing arms 515, between which the fire-retardant pressure roller 51 is rotatably arranged, specifically, the two ends of the fire-retardant pressure roller 51 are respectively connected with the two swing arms 515 through, for example, bearing seats. The swing arms 515 are further provided with a fixed rotating shaft 517 and a balancing adjustment mechanism 518. The fire-retardant pressure roller 51 is arranged on the working position side of the fire-retardant guide roller 52 through the fixed rotating shaft 517. The working position is the working position of the fire-retardant pressure roller 51 and the fire-retardant guide roller 52 in cooperation; or more specifically, the fixed rotating shaft 517 is rotatably connected to the rack, so that the fire-retardant pressure roller 51 is adjacent to the fire-retardant guide roller 52, for example, the fire-retardant pressure roller 51 is above or obliquely above the fire-retardant guide roller 52. The balancing adjustment mechanism 518 is used to control the angle state of the swing arm 515, that is, through the balancing adjustment mechanism 518, the closing and opening between the fire-retardant pressure roller 51 and the fire-retardant guide roller 52 can be realized.

[0073] More specifically, the set of swing arms 515 has a pressure roller fine adjustment device 54. On each swing arm 515, the pressure roller fine adjustment device 54 comprises a fixedly connected top rod sleeve 55 and a pressure roller top rod 56, the top rod sleeve 55 is, for example, a ring-shaped shaft sleeve structure, sleeved on the fixed rotating shaft 517, and the top rod sleeve 55 is key-connected (for example, the structure shown by the black square is a key, more specifically, a flat key) with the fixed rotating shaft 517, so that the angle position of the top rod sleeve 55 and the fixed rotating shaft 517 is relatively fixed. Figure 9

[0074] One of the top rod sleeve 55 and the swing arm 515 is provided with one or more angle fine adjustment strip holes 57, and the other is provided with a bolt fixing hole (or in other ways) corresponding to the angle fine adjustment strip hole 57, a fine adjustment positioning bolt is connected in the bolt fixing hole, and the fine adjustment positioning bolt penetrates into the angle fine adjustment strip hole 57. The angle fine adjustment strip hole 57 is, for example, three or four strip holes (more specifically, arc-shaped strip holes extending in the circumferential direction) uniformly arranged around the fixed rotating shaft 517. The fine adjustment positioning bolt (in the untightened state) can move in position in the angle fine adjustment strip hole 57, so that the swing arm 515 and the top rod sleeve 55 are rotatably connected through the fine adjustment positioning bolt and the angle fine adjustment strip hole 57 (in the equipment maintenance and debugging stage); after the position is determined, the fine adjustment positioning bolt can be tightened to ensure stable connection.

[0075] ​The pressure roller lifting rod 56 is arranged along the length direction of the swing arm 515, is arranged substantially parallel to the swing arm 515, and is arranged at a position in the longitudinal direction of the swing arm 515. The upper and lower sides of the length direction of the pressure roller lifting rod 56 are respectively threadedly connected with angle fine adjustment screws 58, the angle fine adjustment screws 58 can be fixed on the swing arm 515, are used for fine adjustment and clamping of the pressure roller lifting rod 56, and during the adjustment process, one end is fixed and the other end is adjusted, thereby driving the swing arm 515 to rotate, achieving gap adjustment of the fire-retardant pressure roller 51, in other words, adjustment of the relative angle position of the fire-retardant pressure roller 51 with the fixed rotating shaft 517 as the center. Specifically, the two angle fine adjustment screws 58 clamp the pressure roller lifting rod 56 in the middle, for example, the upper angle fine adjustment screw 58 is screwed downward by a distance, and the lower angle fine adjustment screw 58 is screwed outward by a distance, and then the angle between the relatively floating swing arm 515 and the series of fixed components including the pressure roller lifting rod 56, the lifting rod sleeve 55 and the fixed rotating shaft 517 will change accordingly.

[0076] Please refer to Figure 10 For the overall structure, in an ideal state, the quadrilateral formed by the fixed rotating shaft 517, the fire-retardant pressure roller 51 and the two swing arms 515 is located in a plane, and by adjusting the above-mentioned angle of the swing arms 515 at the two ends of the length direction of the fire-retardant pressure roller 51, the torsion of the quadrilateral can be adjusted, and then since the fixed rotating shaft 517 is connected between the fixed frame, the above-mentioned torsion will be reflected in whether the two ends of the length direction of the fire-retardant pressure roller 51 are held flat. In the equipment maintenance and debugging stage, the two ends of the fire-retardant pressure roller 51 are adjusted by adjusting the angle fine adjustment screw 58, so that the fire-retardant pressure roller 51 can be parallel to the fire-retardant guide roller 52, that is, the gap width between the fire-retardant pressure roller 51 and the fire-retardant guide roller 52 is uniform, and the situation that one end of the fire-retardant pressure roller 51 contacts the film while the other end does not contact the film is avoided.

[0077] Please refer to Figures 11 to 13 In other embodiments, the pressure roller fine adjustment device directly adjusts the positioning positions of the two ends of the fire-retardant pressure roller 51, and the pressure roller fine adjustment device includes an adjusting plate 59. The two ends of the fire-retardant pressure roller 51 are respectively connected with the two swing arms 515, the two swing arms 515 are respectively connected with the adjusting plate 59, the adjusting plate 59 is located on the opposite sides of the two swing arms 515, and the swing arm 515 and the adjusting plate 59 are in adjustable fixed connection; the adjusting plate 59 is fixedly connected with a bearing seat 516, and the two ends of the fire-retardant pressure roller 51 are rotatably connected with the bearing seat 516.

[0078] The specific structure of the adjustable fixed connection includes, for example, an adjustment plate 59 with a strip-shaped limiting groove 510, an auxiliary positioning strip hole 511 around the strip-shaped limiting groove 510, and a through hole 512 that passes through the adjustment plate and the strip-shaped limiting groove 510. The length directions of the strip-shaped limiting groove 510, the auxiliary positioning strip hole 511, and the through hole 512 on one adjustment plate 59 are parallel. The adjustment plate includes a first adjustment plate connected to a swing arm 515 on one side and a second adjustment plate connected to a swing arm 515 on the other side. The length directions of the strip-shaped limiting groove 510 on the first adjustment plate and the strip-shaped limiting groove 510 on the second adjustment plate are perpendicular; for example... Figure 11 In the embodiment shown, the adjustment plate on the left side ( Figure 12a As shown, the length direction of each groove and hole is longitudinal (vertical), and the adjustment plate on the right side ( Figure 12b As shown, the length direction of each groove and hole is horizontal.

[0079] A pin 513 is fixedly mounted on the rocker arm 515. The pin 513 protrudes towards the opposite sides of the two rocker arms 515 and passes through the strip-shaped limiting groove 510, allowing it to slide within the groove. The through hole 512 has an internal thread, and the outer ends of the through hole 512 (e.g., ...) Figure 13 Both ends of the roller 51 are threaded with a position fine-tuning screw 514. The inner end of the position fine-tuning screw 514 abuts against the pin 513, thereby fine-tuning and tightening the pin 513, realizing the adjustment of the position of the pin 513 in the strip-shaped limiting groove 510, that is, the adjustment of the position of one end of the flame-retardant pressure roller 51 on the swing arm 515. The swing arm 515 is provided with an auxiliary positioning bolt hole. The auxiliary positioning bolt passes through the auxiliary positioning bolt hole and the auxiliary positioning strip hole 511. During the equipment maintenance and adjustment stage, the auxiliary positioning bolt and the auxiliary positioning strip hole 511 are relatively movable and floating, which can play a sliding connection auxiliary positioning role. After adjusting the position fine-tuning screw 514 to tighten the pin 513 to the required position, the auxiliary positioning bolt can be tightened to ensure the connection stability.

[0080] It is understood that, in some other embodiments, the two ends of the flame-retardant pressure roller 51 may also be connected to the two swing arms 515 via bearing seats. Furthermore, the two types of pressure roller fine-tuning devices described above may be provided simultaneously, or only one of them may be provided; alternatively, no pressure roller fine-tuning device may be provided, and thus, no fine-tuning function may be provided.

[0081] In the preferred embodiment, the balance adjusting mechanism 518 is a self-gravity adjusting mechanism, which includes a balance weight 519 connected to the swing arm 515 in a sliding manner, and is capable of driving the balance weight 519 to move to the side of the fixed rotating shaft 517 by a balance weight driving device, so as to adjust the center of gravity of the swing arm 515 and drive the closing of the fire-retardant pressure roller 51 and the fire-retardant guide roller 52. More specifically, the fire-retardant pressure roller 51 and the balance weight 519 are arranged at the two ends of the swing arm 515 (on the two sides of the fixed rotating shaft 517), for example, the fixed rotating shaft 517 is located at the middle of the swing arm 515, the fire-retardant pressure roller 51 is located at one side of the fixed rotating shaft 517, and the balance weight 519 is located at the other side of the fixed rotating shaft 517. The fixed rotating shaft 517 is connected to the frame, and the closing and opening of the fire-retardant pressure roller 51 and the fire-retardant guide roller 52 are realized by the adjustment of the balance weight 519.

[0082] For the common structure of the longer fire-retardant pressure roller 51, the balance mechanism 53 is arranged at both ends, the balance weight 519 and the fixed rotating shaft 517 are preferably in the shape of a rod, are arranged in parallel with the fire-retardant pressure roller 51, and are connected to the swing arm 515 on both sides, so as to make the overall structure more stable and ensure that the state of the fire-retardant pressure roller 51 is horizontal, and the fire-retardant pressure roller 51 will not be tilted or shaken accidentally due to uneven force on both ends. Of course, the balance weight 519 and / or the fixed rotating shaft 517 can also be arranged separately on each swing arm 515. Preferably, in the balanced state, the height of the fire-retardant pressure roller 51 is lower than that of the balance weight 519, and the swing arm 515 has one end of the fire-retardant pressure roller 51 in a slightly downward inclined state, so as to better keep the fire-retardant pressure roller 51 in the balanced position and achieve the effect of gently pressing the film.

[0083] Preferably, the balance weight 519, the fixed rotating shaft 517 and / or the fire-retardant pressure roller 51 are connected to the swing arm 515 in a position-adjustable manner, so as to facilitate the flexible adjustment of the balanced state of the fire-retardant pressure roller 51 according to the actual situation.

[0084] The balance weight 519 can be adjusted (i.e. by driving the balance weight 519 through a balance weight driving device). For example, the end of the swing arm 515 is provided with a sliding groove extending towards the side of the fixed pivot shaft 517, the balance weight 519 is slidingly connected in the sliding groove, the balance weight driving device is a balance weight adjusting bolt 520, the balance weight 519 has threaded holes on both ends, the balance weight adjusting bolt 520 is threadedly connected with the balance weight 519, and the balance weight adjusting bolt 520 is rotationally connected with the swing arm 515. The slidable direction of the balance weight 519 matches the length direction of the balance weight adjusting bolt 520, and both are towards the middle of the swing arm 515 from the end. During adjustment, the balance weight adjusting bolt 520 is rotated in place, and due to the cooperation of the threads and the sliding limit, the balance weight 519 can move along the sliding groove, thereby adjusting the torque on the balance weight side; for example, the balance weight 519 is moved from the end to the middle, so that the fireproof compression roller 51 is changed from the open state to the closed state. Alternatively, as an optional alternative, the balance weight adjusting bolt 520 is rotationally connected with the balance weight 519, and the balance weight adjusting bolt 520 is threadedly connected with the swing arm 515, which can also achieve similar technical effects. Further optionally, the balance weight adjusting bolt 520 is connected with an electric driving device to control its rotation, thereby enabling wired control or remote control or automatic control, etc.

[0085] It can be understood that the balance adjusting mechanism 518 is not limited to the above embodiments. For example, in some embodiments, the balance adjusting mechanism 518 is a pneumatic cylinder or a hydraulic cylinder arranged at the end of the balance mechanism 53 away from the fireproof guide roller 52. For reference Figure 1 , the balance adjusting mechanism 518 shown is a connecting rod adjustably or rotationally or fixedly arranged at the end of the swing arm 515, the connecting rod is connected with the pneumatic cylinder or the hydraulic cylinder, and the other end of the pneumatic cylinder or the hydraulic cylinder is arranged on the rack; the extension rod of the pneumatic cylinder or the hydraulic cylinder is rotationally connected with the swing arm 515, and / or the other end of the pneumatic cylinder or the hydraulic cylinder is rotationally connected with the rack; thereby the angle of the swing arm 515 can be directly controlled through the extension amount of the pneumatic cylinder or the hydraulic cylinder. It can be conceived that the pneumatic cylinder or the hydraulic cylinder can be selected to be connected to any one side (close to or away from the fireproof compression roller 51) of the fixed pivot shaft 517 on the swing arm 515.

[0086] In other embodiments, the balance adjusting mechanism 518 is a driving motor connected with the fixed pivot shaft 517 and used for directly adjusting the angle of the fixed pivot shaft 517; which can achieve remote or automatic control, for example. In still other embodiments, the weight of the balance weight 519 can be adjusted, for example, by replacing different balance weights 519 or adding or removing weights on one balance weight 519, etc.

[0087] Furthermore, the balancing mechanism is not limited to the above embodiments. For example, in some embodiments, the balancing mechanism 53 is one or more elastic elements such as springs, one end of the spring is connected to the frame, and the other end of the spring is connected to the flame-retardant pressure roller 51. The elastic force of the spring balances the weight of the flame-retardant pressure roller 51 (and the counterweight) to achieve the desired technical effect. In other embodiments, the position of the flame-retardant pressure roller 51 is directly connected and driven by, for example, a cylinder or hydraulic cylinder.

[0088] 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 9 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.

[0089] Other adjustable settings for the swing arm 515 are similar to those for the aforementioned adjustable counterweight 519 or the pressure roller fine-tuning device, and will not be described in detail here. It is understood that there are numerous alternative solutions or variations of the above-described adjustable settings, which will not be listed here, and the present invention is not limited to the specific solutions illustrated.

[0090] 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 9 Unlike 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.

[0091] Please see Figures 14 to 19 This invention also provides a cast film peeling chamber. 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 6 on the side near the peeling chamber. The film then enters the peeling chamber for further solvent discharge and longitudinal stretching. Downstream of the peeling chamber is a horizontal stretching machine, where the film is further heated and stretched laterally. Downstream of the peeling chamber is a clamping adjustment mechanism for adjusting the angle of the horizontal stretching machine's chain clamp (clamping the film edge). The relevant basic processes and structures are existing technology and will not be described in detail here.

[0092] The peeling chamber is a sealed box structure with at least a film inlet, an outlet, and a ventilation system. The peeling chamber contains a multi-roller system for peeling the cast film according to the present invention (the multi-roller system is in...). Figure 15 (The diagram is simplified.) The film peeled off from the casting machine enters the film inlet and is conveyed in the peeling chamber. During this process, tension control and stretching are performed, and solvent evaporates from the film. The solvent gas is discharged from the peeling chamber through the ventilation system and collected for treatment. The peeling chamber is isolated from the outside environment to prevent solvent gas from escaping and causing explosions or harming the health of workers.

[0093] In order to improve the isolation effect of the gas and temperature in the stripping chamber, the negative pressure air curtain device 7 is arranged at the film inlet of the stripping chamber. The negative pressure air curtain device 7 includes the oppositely arranged first air suction part 71 and the second air suction part 72. At least one flow uniformizing plate 73 is arranged in the first air suction part 71 and / or the second air suction part 72. The first air suction part 71 and the second air suction part 72 are respectively arranged on the upper and lower sides of the film conveying path. The channel space 74 for the film passing through is formed between the first air suction part 71 and the second air suction part 72. The width of the channel space 74 is matched with the width of the film.

[0094] It should be noted that the relative of the first air suction part 71 and the second air suction part 72 refers to the relative of the air suction ports. In other words, both of them have through holes (which can be called air holes) on the inward side for air passing through. The air holes are directly arranged on the air suction part (such as the air bellow) or are arranged on the flow uniformizing plate 73. In order to ensure the negative pressure air curtain effect, at least one side of the air suction part is limited to use the flow uniformizing plate 73 in the present scheme. The flow uniformizing plate 73 can be one piece or a multi-piece or multi-layer structure, which will be further introduced later. The size of the channel space 74 is matched with the film, which can further ensure that a relatively closed partition is formed on both sides of the negative pressure air curtain device. Specifically, the width covers the film and is generally greater than or equal to the width.

[0095] In the working process of the device, the first air suction part 71 and the second air suction part 72 are used to simultaneously perform air suction. The flow uniformizing plate 73 can make the air speed uniform. If there is no flow uniformizing plate, the air speed near the air suction part (such as the air suction pipe) will be larger, and the air far from the air suction part (such as the air suction pipe) cannot be sucked. The channel space 74 is used for the film conveyed in the process equipment to pass through the middle. When the film passes through, it will not be impacted by a strong air flow. The air flow in the two spaces separated by the negative pressure air curtain device will be sucked away by the first air suction part 71 and the second air suction part 72 when reaching the vicinity of the negative pressure air curtain device. The air flow in the former space cannot enter the latter space, and vice versa. In this way, the environments of the adjacent spaces are relatively independent, and the ventilation effect of the space in the equipment is also ensured. In the present scheme, the negative pressure air curtain device 7 is arranged on the basis of the existing or required ventilation system. In other words, the negative pressure air curtain device 7 is mainly used to form an air curtain at the inlet. The air flow in the stripping chamber and the timely discharge of the solvent are still mainly realized by the ventilation system.

[0096] Preferably, the entrance and / or exit of the channel space 74 is provided with an adjustable wind baffle (or partition) matching the thickness of the film, which is used to further reduce the entrance / exit to close to the thickness of the film, so as to better separate the front and rear spaces of the negative pressure air curtain device, and avoid the entrance / exit being too large and still allowing gas to escape. For example, the partition includes at least one slit baffle 76 on the first suction part 71 and / or the second suction part 72, which is a sealingly connected and fixed upper and lower baffle on the outside. The slit baffle 76 forms a slit at the entrance and / or exit of the channel space 74, and the size of the slit is smaller than the channel space 74. The distance between the first suction part 71 and the second suction part 72 cannot be too close, so that the size of the entrance and / or exit of the channel space 74 can be further limited by the slit baffle 76, and the position and size of the adjustable slit are preferably adjusted (for example, the slit is formed by two detachable / adjustable position baffles). More specifically, for example, the slit is located at the center between the first suction part 71 and the second suction part 72, so that the distance between the film and the first suction part 71 and the second suction part 72 is substantially the same. The slit baffle 76 can allow thinner films to pass through while preventing gas in the stripping chamber from escaping. It is conceivable that in other feasible embodiments, the partition is a plate with a slit, or a pipe-like structure, or further provided with a flow guide / filter structure, etc., all of which are intended to serve as a partition and do not deviate from the concept of the present scheme.

[0097] Preferably, the channel side plates 75 are further provided on the outer sides of the first suction part 71 and the second suction part 72, which together with the flow plates 73 of the first suction part 71 and the second suction part 72 form four side walls of the channel space 74. In actual application, the position and size of the channel space 74 are not greater than the communication port of the front and rear spaces, and are sealed with the communication port, so as to ensure that the airflow at the communication port can only flow to the first suction part 71 and the second suction part 72, but cannot escape from other places around the communication port. It can be understood that for the case that the process space (stripping chamber) is small or the first suction part 71 and the second suction part 72 are large, the side wall of the process space can be equivalent to the side wall of the channel space, which can effectively achieve the desired effect, so that the channel side plate 75 (and other structures limiting the communication port) can not be required.

[0098] In some embodiments, the first air suction part 71 and the second air suction part 72 are in strip shape to match the width of the space communication port (the film inlet); the flow uniformizing plate 73 is a porous strip flat plate, and the flow uniformizing plates 73 of the first air suction part 71 and the second air suction part 72 are parallel. This scheme is small in size and is convenient for production and use while realizing the required functions; the air curtain device should not be too large to affect the work of the main ventilation system, and in addition, if the air curtain device is too large, it will also affect the overall equipment box size, leading to increased cost, poor heat insulation and other effects. The first air suction part 71 and the second air suction part 72 are arranged in correspondence, for example, to match the horizontally conveyed film.

[0099] More specifically, the negative pressure air curtain device comprises a first air-tight air tank 77 and a second air-tight air tank 78; the first air-tight air tank 77 is connected with a first air suction pipe 79, and the first air-tight air tank 77 forms a first air suction part 71 on the side facing the second air-tight air tank 78; the second air-tight air tank 78 is connected with a second air suction pipe 710, and the second air-tight air tank 78 forms a second air suction part 72 on the side facing the first air-tight air tank 77. The flow uniformizing plate 73 matches the first air-tight air tank 77 and the second air-tight air tank 78 to ensure the uniformity of the airflow. The channel side plate 75 and the slit baffle 76 (if any) are arranged on the first air-tight air tank 77 and the second air-tight air tank 78. Preferably, the first air suction pipe 79 is arranged on both sides of the first air-tight air tank 77, and the second air suction pipe 710 is arranged on both sides of the second air-tight air tank 78; this two-side air suction pipe arrangement is more conducive to making the airflow uniform at each part of the flow uniformizing plate 73.

[0100] Further, the flow uniformizing plate 73 is provided with a wind speed collecting device 711 (such as an anemometer), and the outside of the first air suction part 71 and / or the second air suction part 72 is connected with a wind speed adjusting mechanism 712 (such as a speed-regulating fan or a wind adjusting valve independent of the fan, etc.) through an air suction pipe, so as to be able to monitor the wind speed and make adjustments. Specifically, the first air suction part 71 and / or the second air suction part 72 is connected with an air suction pipe, which for example comprises the first air suction pipe 79 and the second air suction pipe 710, and the wind speed adjusting mechanism 712 is arranged at the outer end of the air suction pipe. Preferably, the wind speed collecting device 711 is also electrically connected with the wind speed adjusting mechanism 712 to be able to transmit signals, so as to realize automatic adjustment control according to the wind speed. More specifically, the ends of the first air suction pipe 79 and the second air suction pipe 710 converge into one pipe, which is connected with one wind speed adjusting mechanism 712, or the first air suction pipe 79 and the second air suction pipe 710 are respectively connected with respective wind speed adjusting mechanisms.

[0101] Preferably, the flow uniformizing plate 73 inside the first air suction part 71 and / or the second air suction part 72 is arranged in multiple layers to make the flow uniformizing effect better. The flow uniformizing plate 73 arranged in multiple layers is arranged in parallel along the film conveying direction or is arranged in an inclined manner along the film conveying direction; for example Figure 16In the shown embodiment, the flow-equalizing plate 73 is two layers arranged parallel (transversely) along the film conveying direction; in other embodiments, the flow-equalizing plate 73 is not parallel to the film conveying direction but is arranged at an angle, i.e. is arranged obliquely. The flow-equalizing plate 73 has a plurality of air holes or a plurality of slit holes, the air holes or slit holes of each layer being arranged opposite or staggered. Opposite arrangement means that, in the direction of the air flow, the air holes are opposite, and the connecting line of the corresponding air holes is parallel to the direction of the air flow; staggered arrangement means that, in the direction of the air flow, the air holes are staggered. In some embodiments, the air holes are, for example, small holes closely arranged on the flow-equalizing plate 73; in other embodiments, the air holes are strip-shaped holes arranged in an array, or the flow-equalizing plate 73 is in a grid or mesh shape; or a combination of multiple hole types; the slit holes are elongated slit-shaped holes, and there is, for example, one or more slit holes, and the length direction of the slit holes is, for example, parallel to or inclined at an angle to the film width direction.

[0102] Further, the box wall of the stripping chamber is provided with an air curtain outlet, and the ends of the first and second air suction pipes 79 and 710 are sealingly connected to the air outlet of the sealing box; the specific arrangement of the air suction pipe can be designed according to the situation, for example, the air outlet connected to the top or side wall of the box. The first and second air suction pipes 79 and 710 are also provided with, for example, a waste gas treatment system at the rear end of the fan. In some embodiments, the ventilation system also includes a rear-end air supply box located at the bottom of the rear end inside the stripping chamber to suck air in the dead angle position, and the rear-end air supply box is connected to the outside of the stripping chamber through a pipeline and converges with the pipeline of the negative pressure air curtain device 7 into one pipeline. The specific arrangement of the ventilation system other than the negative pressure air curtain device can be selected as needed, and is not the focus of the present improvement, and will not be described here.

[0103] It should be noted that the existing air curtain device generally forms an air curtain by blowing a strong air flow, and is usually not oppositely arranged on both sides. And it cannot be used in the stripping chamber. The film is a wet film with a relatively high solvent content. Strong air flow cannot be used to impact the film surface, otherwise it will affect the film quality. Therefore, the existing stripping chamber does not have an air curtain and is directly connected. Although the ventilation system provides negative pressure, gas escape may still occur. The negative pressure air curtain device can be optionally arranged at the input end of the equipment box. It can separate different process environment areas such as temperature zones, thereby meeting various complex process requirements. At the same time, due to the existence of the negative pressure air curtain, a local transition area between the process environment areas can be formed, thereby avoiding problems such as temperature sudden change of the film after entering a certain area. The two air extraction parts in the negative pressure air curtain device are oppositely arranged and simultaneously extract air. Both are provided with flow uniformizing plates to ensure the uniformity of air flow intensity. A negative pressure air curtain is formed in the channel space between the two air extraction parts. The film can be transported in the front and rear spaces through the channel space. Due to the existence of the negative pressure air curtain between the two spaces, the temperature and gas of the two spaces do not affect each other (for example, different temperature and different component content gases escape / mutual stringing), thereby effectively ensuring the accuracy and stability of the high-end process for process environment control.

[0104] The stripping chamber has a maintenance entrance and a buffer room (equivalent to an internal wall of the stripping chamber) at the maintenance entrance. The buffer room is a small space that can be independently separated from the stripping chamber. The buffer room is one or more, for example, the buffer room is located at the front end (film input end) of the left and / or right side of the stripping chamber. The buffer room is provided with a buffer room inner door on the side close to the inside of the stripping chamber, and a buffer room outer door on the side away from the inside of the stripping chamber. When the stripping chamber is working, the buffer room inner door and the buffer room outer door are both closed in a sealed manner; when maintenance is performed, the worker first opens the buffer room outer door to enter the buffer room, closes the buffer room outer door, and then opens the buffer room inner door to enter the stripping chamber, thereby preventing the solvent in the stripping chamber from leaking out. In particular, the stripping chamber is usually in a slightly positive pressure state, so if there is no double-door structure of the present scheme, the solvent will easily escape and pollute the external air during maintenance.

[0105] Preferably, the position of the multi-roller system in the stripping chamber is higher than the ground. For example, the distance between the lowest roller in the multi-roller system and the ground in the stripping chamber is greater than one meter, and the arrangement height of most rollers is about 2.2 meters, especially for the rollers near the buffer room inner door. Such arrangement can avoid the situation that the dust on the ground is raised and adheres to the film during personnel operation. It should be noted that the stripping chamber is a clean space, but only the dust proportion in the space is extremely low, not completely non-existent. In existing equipment, rollers are usually arranged close to the ground for the convenience of maintenance, etc. However, the present scheme considers the high quality requirements of high-end films and improves from the easily overlooked aspect of roller arrangement height, thereby further ensuring the film quality.

[0106] The stripping roller 6 is preferably a driving roller, that is, the stripping roller 6 is connected with a driving mechanism such as a motor, so as to be driven to rotate. Compared with the conventional equipment in which the stripping roller is a passive roller and is driven to rotate by the front end of the casting machine, the preferred scheme has more uniform and controllable force in the stripping process, which helps to obtain a film with better uniformity. Further preferably, the stripping roller 6 is adjustably arranged on the rack, so that the position of the stripping roller 6 can be adjusted according to the process requirements, especially the distance between the stripping roller 6 and the driving drum, on which the film to be stripped is arranged, can be adjusted. The adjustment of the distance can adjust the wrap angle of the film stripping, and then affect the stripping force, stretching effect, etc. In the conventional equipment, the position of the stripping roller is fixed, and the wrap angle of the stripping is also fixed and cannot be adjusted. The position of the stripping roller 6 can be adjusted in various ways. For example, the rack has a track with a length direction being the front-rear direction, the two ends of the stripping roller 6 are slidably connected with the track through roller frames, a screw rod is threadedly connected to the roller frame, the length direction of the screw rod is the front-rear direction, and the end of the screw rod is connected with a motor and / or a hand wheel, so that the front-rear movement of the stripping roller 6 can be controlled with high precision by rotating the screw rod. Further preferably, the rack also has a scale with a length direction being the front-rear direction, and the roller frame of the stripping roller 6 has a pointer part pointing to the scale, so that the position of the stripping roller 6 can be accurately adjusted.

[0107] In summary, in the multi-roller system after the film is stripped according to the present application, both the two traction rollers are driving rollers, the path of the film is S-shaped around the two traction rollers, which functions to increase the wrap angle and achieve the function of tension interruption; the existing scheme usually uses a pressure roller to interrupt the front and rear tensions during the film conveying process, but since the film at this position is a wet film containing a large amount of solvent, if the pressure roller is used, it will produce an embossing effect and affect the film thickness, therefore this special traction roller structure is designed; and, a gravity roller is arranged behind the traction roller, which provides a constant tension by gravity or other means, so as to adjust the tension and perform micro longitudinal stretching; in this way, the film quality is improved. More preferably, two edge pressure wheels are further arranged, which function to assist in flattening the edges of the film and prevent the edges of the film from curling; and a fire-resistant roller, which gently presses on the film in a micro-pressure state and does not affect the flatness and thickness of the film, can achieve the function of extinguishing the fire when the film catches fire, has a simple structure and low cost, and can achieve fire extinguishing by physical means without the need for motor control and fire extinguishing agent spraying. It can be understood that the conversion between the open state and the closed state of the fire-resistant roller assembly can be achieved by manual or electric or automatic control, for example, manual control after the fire is found or equipped with a fire monitoring device for automatic control after the fire occurs and is extinguished.

[0108] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not limited to them; Obviously, the described examples are part of the embodiments of the present application, rather than all. Based on the examples in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application; For the convenience of description, only the part related to the utility model is shown in the drawings. In the case of no conflict, the examples in the present application and the features in the examples can be combined with each other; The technical solutions recorded in the foregoing examples are modified, or some technical features are replaced equivalently, and the essence of the corresponding technical solution does not deviate from the spirit and scope of the technical solutions of each embodiment of the present application.

Claims

1. A post-cast film peel-off multi-roll system, characterized by, The multiple roller system comprises guide rollers, traction rollers and gravity rollers arranged on a frame of the multiple roller system; the guide rollers are driven rollers; the traction rollers are located on a downstream side of the stripping rollers, and one or more guide rollers are arranged between the traction rollers and the stripping rollers; the traction rollers comprise two adjacent driving rollers, and the film conveying path is in an S-shaped structure at the traction rollers; the gravity rollers are located on a downstream side of the traction rollers, and one or more guide rollers are arranged between the gravity rollers and the traction rollers; the gravity rollers are driven rollers, and the upstream side and the downstream side of the gravity rollers are adjacent to the guide rollers; the height position of the gravity rollers is lower than that of the guide rollers on both sides; the gravity rollers and the gravity roller counterweight mechanism are arranged on the same closed chain or are arranged on two closed chains through a synchronous transmission mechanism. The closed chain comprises a roller chain and a counterweight chain, and the gravity rollers and the gravity roller counterweight mechanism are arranged on the roller chain and the counterweight chain respectively; the roller chain is in a vertical annular arrangement, and the roller chain is drivingly connected to roller sprockets at the upper and lower ends thereof; a floating block is connected to the roller chain, and the gravity rollers are rotatably connected to the floating block; the synchronous transmission mechanism comprises a gravity roller synchronous shaft, and the upper and / or lower roller sprocket is coaxially connected to a counterweight sprocket through the gravity roller synchronous shaft; the counterweight sprocket is drivingly connected to the counterweight chain; the counterweight chain is in a vertical annular arrangement, and the counterweight chain is connected to the gravity roller counterweight mechanism; the roller sprocket and the counterweight sprocket are rotatably arranged on the frame. The two edge rollers are arranged at the two side edges of the multiple roller system, and are located on the upper side and / or the lower side of the film conveying path. The fireproof roller assembly comprises a fireproof compression roller and a fireproof guide roller, the fireproof compression roller is arranged on the balance mechanism, and the fireproof guide roller is one of the guide rollers; in a normal state, the fireproof compression roller and the fireproof guide roller are in a non-closed state, and in a fire state, the balance mechanism drives the fireproof compression roller to close with the fireproof guide roller.

2. The multi-roll system after the cast film stripping according to claim 1, characterized in that, The two edge rollers are arranged at the two side edges of the multiple roller system, and are located on the upper side and / or the lower side of the film conveying path.

3. The multi-roll system after the cast film stripping according to claim 1, characterized in that, The two edge rollers are arranged at the two side edges of the multiple roller system, and are located on the upper side and / or the lower side of the film conveying path.

4. The multi-roll system after the cast film stripping according to claim 1, characterized in that, The two edge rollers are arranged at the two side edges of the multiple roller system, and are located on the upper side and / or the lower side of the film conveying path.

5. The post-cast film peel-off multi-roll system according to any one of claims 1-3, wherein, The balance mechanism comprises a group of swing arms, the fireproof compression roller is arranged between the swing arms, a fixed shaft and a balance adjusting mechanism are further arranged on the swing arms, the fireproof compression roller is arranged on one side of the working position of the fireproof guide roller through the fixed shaft, and the balance adjusting mechanism is used to realize the closing and opening between the fireproof compression roller and the fireproof guide roller.

6. A cast film stripping chamber characterized by, At least three guide rollers are arranged between the traction rollers and the stripping rollers to form a cooling conveying section. The stripping chamber is a sealed box structure with at least a film inlet, an outlet and a ventilation system, and the multiple roller system after the cast film is stripped in the stripping chamber.

7. The cast film peel chamber of claim 6, wherein, The negative pressure air curtain device is arranged at the film inlet of the stripping chamber, and comprises oppositely arranged first and second air extraction parts, at least one flow uniformizing plate is arranged in the first and / or second air extraction part, the first and second air extraction parts are respectively arranged on the upper and lower sides of the film conveying path, and a channel space for the film to pass through is formed between the first and second air extraction parts, and the width of the channel space is matched with the width of the film.

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