Film cooling machine

Abstract

The utility model discloses a thin film cooling machine which comprises a thin film placing assembly used for placing a thin film; the cooling cavity can be used for accommodating the film placement assembly; the cooling medium supply assembly is communicated with the cooling cavity and can be used for supplying a cooling medium into the cooling cavity; the vacuumizing assembly is communicated with the cooling cavity and is used for extracting gas in the cooling cavity; the vacuumizing assembly is arranged to pump out oxygen in the cooling cavity, so that the film is not prone to oxidation in the cooling process; the cooling medium supply assembly is arranged to cool the thin film in the cooling cavity, so that the cooling speed of the thin film is increased; therefore, the device has the advantages that the film can be quickly cooled and is not easy to oxidize in the cooling process, and the production efficiency of the film and the product quality of the film can be improved.

Description

Technical Field

[0001] The utility model relates to a conductive film cooling device, in particular to a film cooler. Background Art

[0002] A conductive film is a polymer material with a metal coating on its surface, which is widely used in lithium-ion batteries and mainly serves as a current collector in lithium-ion batteries.

[0003] Existing conductive films mostly use vacuum evaporation coating or magnetron sputtering coating. Taking the vacuum evaporation coating process as an example, vacuum evaporation refers to the process of evaporating a coating material (or film material) in a vacuum condition by a certain evaporation method, vaporizing the coating material, and the vaporized particles flying to the surface of the film and condensing into a film to form a conductive film.

[0004] After the existing conductive film is coated and wound up, its temperature is still relatively high and it cannot be directly sent for slitting. Therefore, it needs to be cooled first. Generally, the wound conductive film roll is placed in the air for natural cooling. This method usually has a slow cooling speed, a long waiting time, reduces production efficiency, and is prone to oxidation during air cooling. Summary of the Utility Model

[0005] In order to overcome the technical problems in the prior art that the temperature of the conductive film is high after coating, the natural cooling speed is slow, it is prone to oxidation and affects the production efficiency, the utility model provides a film cooler.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0007] A film cooler, comprising:

[0008] A film placement assembly for placing the film;

[0009] A cooling chamber for accommodating the film placement assembly;

[0010] A cooling medium supply assembly connected to the cooling chamber for supplying a cooling medium into the cooling chamber;

[0011] A vacuum pumping assembly connected to the cooling chamber for pumping out the gas in the cooling chamber.

[0012] The film cooler as described above further comprises a frame;

[0013] Mounting parts are provided on the frame, and the film placement assembly is fixedly mounted on the mounting parts;

[0014] A transmission assembly is provided between the mounting parts and the frame for driving the film placement assembly to enter and exit the cooling chamber.

[0015] The film cooling machine as described above, wherein the transmission assembly includes more than two parallel sliding rails, a plurality of pulleys slidably disposed on the sliding rails, a connecting shaft concentrically connecting adjacent pulleys, and a driving member drivingly connected to the connecting shaft;

[0016] The sliding rails are disposed on the frame;

[0017] The pulleys are disposed on the mounting member;

[0018] The connecting shaft is perpendicular to the sliding rails;

[0019] The driving member can drive the connecting shaft to rotate axially along the connecting shaft, so as to drive the mounting member to move on the sliding rails.

[0020] The film cooling machine as described above, wherein the film placement assembly includes a winding assembly and a fixing frame for mounting the winding assembly;

[0021] A sliding guide assembly is provided between the fixing frame and the inner wall of the cooling cavity, and the sliding guide assembly can be used to guide the film placement assembly in and out of the cooling cavity.

[0022] The film cooling machine as described above, wherein the winding assembly includes a winding cavity adjacent to the fixing frame, a plurality of film running rollers rotatably mounted on the winding cavity, and a winding driving member for driving the film running rollers to rotate;

[0023] The fixed end of the winding driving member is disposed on the fixing frame, and the output end of the winding driving member penetrates through the fixing frame and is connected to the film running roller.

[0024] The film cooling machine as described above, wherein the film running rollers include an unwinding roller, a flattening roller parallel to the unwinding roller, and a winding roller parallel to the flattening roller;

[0025] The unwinding roller is used for mounting a core wound by the film;

[0026] The flattening roller can be used to flatten the film between the unwinding roller and the winding roller;

[0027] The winding roller can be used to wind up the film flattened by the flattening roller.

[0028] The film cooling machine as described above, wherein opposite first and second adjustment mounting platforms are provided on the inner wall of the winding cavity; the first adjustment mounting platform is used for mounting one end of the unwinding roller or the winding roller, and the second adjustment mounting platform is used for mounting the other end of the unwinding roller or the winding roller;

[0029] The first adjustment mounting table is provided with a clamping drive group, and the clamping drive group includes an output transmission gear arranged at the output end of the winding drive member, a roller transmission gear arranged at one end of the unwinding roller or the winding roller, a coupling push rod hinged to the first adjustment mounting table, and a coupling sleeve fixedly connected to the coupling push rod. The inner wall of the coupling sleeve is provided with coupling sleeve transmission teeth;

[0030] The coupling push rod can adjust the position of the coupling sleeve relative to the output transmission gear and the roller transmission gear, so that the coupling sleeve transmission teeth at both ends of the coupling sleeve are engaged with the output transmission gear and the roller transmission gear.

[0031] For the film cooling machine as described above, the clamping drive group further includes a positioning member that can be used to fix the relative position of the coupling push rod and the first adjustment mounting table. One end of the positioning member is arranged on the coupling push rod and the other end of the positioning member can abut against the first adjustment mounting table.

[0032] For the film cooling machine as described above, the roller core of the unwinding roller or the winding roller is an air shaft, and rolling bearings are fixedly connected to the outer peripheral sides at both ends of the air shaft;

[0033] The mounting table is fixedly connected with a first clamping block. A second clamping block detachably connected to the first clamping block and a fixing member for fixing the relative position of the second clamping block and the first clamping block are arranged on the first clamping block;

[0034] The fixing member penetrates through the first clamping block and the second clamping block to fix the outer ring of the rolling bearing between the first clamping block and the second clamping block.

[0035] For the film cooling machine as described above, a winding pressure roller is arranged between the winding roller and the flattening roller, and an unwinding pressure roller is arranged between the flattening roller and the unwinding roller;

[0036] The film running roller further includes a winding rotating shaft and an unwinding rotating shaft;

[0037] A winding connecting rod is fixedly connected to the winding rotating shaft, and the winding pressure roller is connected to the winding rotating shaft through the winding connecting rod;

[0038] A unwinding connecting rod is fixedly connected to the unwinding rotating shaft, and the unwinding pressure roller is connected to the unwinding rotating shaft through the unwinding connecting rod.

[0039] The beneficial effects of the present utility model are:

[0040] A vacuum extraction component is provided to extract oxygen in the cooling chamber, so that the film is not easily oxidized during the cooling process; a cooling medium supply component is provided to cool the film in the cooling chamber, thereby enhancing the cooling rate of the film. Therefore, the device has the advantages of enabling the film to cool down quickly and the film not being easily oxidized during the cooling process, which can improve the production efficiency of the film and the product quality of the film. Brief Description of the Drawings

[0041] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0042] Figure 1 is one of the structural schematic diagrams of the film cooler;

[0043] Figure 2 is Figure 1 the left view of

[0044] Figure 3 is the second structural schematic diagram of the film cooler;

[0045] Figure 4 is Figure 3 the enlarged view of the structure of part B in

[0046] Figure 5 is Figure 3 the sectional view of the A-A plane in

[0047] Figure 6 is the exploded view of the clamping drive group;

[0048] Figure 7 is the third structural schematic diagram of the film cooler;

[0049] Figure 8 is the fourth structural schematic diagram of the film cooler;

[0050] The reference numerals in this embodiment are as follows:

[0051] 1 Film placement assembly, 11 Winding assembly, 111 Winding cavity, 111-1 First adjustment mounting table, 111-2 Second adjustment mounting table, 112 Film running roller, 112-0 Air shaft, 112-1 Unwinding roller, 112-2 Flattening roller, 112-3 Rewinding roller, 112-4 Rolling bearing, 112-5 Rewinding pressure roller, 112-51 Rewinding rotating shaft, 112-52 Rewinding connecting rod, 112-6 Unwinding pressure roller, 112-61 Unwinding rotating shaft, 112-62 Unwinding connecting rod, 113 Winding driving member, 12 Fixed frame, 2 Cooling cavity, 3 Cooling medium supply assembly, 4 Vacuum pumping assembly, 5 Machine frame, 6 Mounting member, 7 Transmission assembly, 70 Sliding guiding assembly, 71 Slide rail, 72 Pulley, 73 Connecting shaft, 74 Driving member, 81 First clamping block, 82 Second clamping block, 83 Fixing member, 91 Film, 9 Core, 10 Clamping driving group, 101 Transmission gear, 102 Roller transmission gear, 103 Coupling push rod, 104 Coupling sleeve, 105 Positioning member. Detailed implementation manners

[0052] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with embodiments and drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to specific implementation situations. Each technical feature in the creation of the present utility model can be combined interactively without conflicting with each other.

[0053] Referring to Figure 1 As shown, a film cooler includes a film placement assembly 1 for placing the film 91, a cooling cavity 2 for accommodating the film placement assembly 1, a cooling medium supply assembly 3 connected to the cooling cavity 2 and for supplying a cooling medium into the cooling cavity 2, and a vacuum pumping assembly 4 connected to the cooling cavity 2 and for pumping out the gas in the cooling cavity 2.

[0054] The vacuum pumping assembly 4 pumps out the oxygen in the cooling cavity, so that the film 91 is not easily oxidized during the cooling process; the cooling medium supply assembly 3 cools the film in the cooling cavity, thereby improving the cooling speed of the film; therefore, the film cooler in this embodiment has the advantages of quickly cooling the film and the film not being easily oxidized during the cooling process, which can improve the production efficiency of the film and the product quality of the film.

[0055] Further, the vacuum pumping assembly 4 includes a vacuum pipeline communicating with the cooling chamber 2, a Roots pump, and a communication valve provided between the Roots pump and the vacuum pipeline; a gas release valve for destroying the vacuum state is also provided on the cooling chamber 2.

[0056] Further, the cooling medium supply assembly 3 can be a cooling nitrogen supply group for supplying cooling nitrogen, or a cooling carbon dioxide supply group for supplying cooling carbon dioxide, or any one of the commonly used cooling gases in industry.

[0057] Further, it further includes: a frame 5; a mounting member 6 is provided on the frame 5, and the film placement assembly 1 is fixedly mounted on the mounting member 6;

[0058] A transmission assembly 7 for driving the film placement assembly 1 to enter and exit the cooling chamber 2 is provided between the mounting member 6 and the frame 5.

[0059] The arrangement of the transmission assembly 7 increases the reliability and stability when the film placement assembly 1 moves relative to the cooling chamber 2. In the process of manual operation, it is inevitable that the film placement assembly 1 is misaligned with and interferes with the cooling chamber 2; and it can ensure that the film placement assembly 1 runs smoothly during the process of entering and exiting the cooling chamber 2, improving production efficiency.

[0060] Refer to Figure 1 、 Figure 2 As shown in

[0061] Specifically, the transmission assembly 7 includes two or more mutually parallel slide rails 71, several pulleys 72 slidably provided on the slide rails 71, a connecting shaft 73 that concentrically connects adjacent pulleys 72, and a driving member 74 drivingly connected to the connecting shaft 73;

[0062] The slide rails 71 are provided on the frame 5;

[0063] The pulleys 72 are provided on the mounting member 6;

[0064] The connecting shaft 73 is arranged perpendicular to the slide rails 71;

[0065] A transmission chain is provided on the output end of the driving member 74, and the transmission chain is also connected to the connecting shaft 7; the driving member 74 drives the transmission chain to rotate to drive the connecting shaft 7 to rotate, so that the pulleys 72 rotate on the slide rails 71, driving the film placement assembly 1 on the mounting member 6 to move relative to the cooling chamber 2;

[0066] Specifically, the above-mentioned transmission component 7 can also be composed of a slider fixed on the mounting member 6, a lead screw passing through the slider, and a driving member for driving the lead screw to rotate; the driving member drives the lead screw to rotate, so that the slider moves on the lead screw, thereby driving the film placement component 1 to move relative to the cooling chamber 2;

[0067] Specifically, the film placement component 1 includes a winding component 11 and a fixing frame 12 for mounting the winding component 11;

[0068] A sliding guide component 70 is provided between the fixing frame 12 and the inner wall of the cooling chamber 2, and the sliding guide component 70 can be used to guide the direction of the film placement component 1 in and out of the cooling chamber 2; the sliding guide component 70 cooperates with the transmission component 7 to assist the film placement component 1 to smoothly enter and exit the cooling chamber 2.

[0069] As Figure 3 shown, more specifically, the winding component 11 includes a winding cavity 111 adjacent to the fixing frame 12, several film guiding rollers 112 rotatably mounted on the winding cavity 111, and a winding driving member 113 for driving the film guiding rollers 112 to rotate;

[0070] The fixed end of the winding driving member 113 is provided on the fixing frame 12, and the output end of the winding driving member 113 penetrates through the fixing frame 12 and is connected to the film guiding roller 112.

[0071] As Figure 7 shown, more specifically, the film guiding roller 112 includes an unwinding roller 112-1, a flattening roller 112-2 arranged parallel to the unwinding roller 112-1, and a winding roller 112-3 parallel to the flattening roller 112-2;

[0072] The unwinding roller 112-1 is used for mounting a core 9 wound by the film 91;

[0073] The flattening roller 112-2 can be used to flatten the film 91 between the unwinding roller 112-1 and the winding roller 112-3;

[0074] The winding roller 112-3 can be used to collect the film 91 flattened by the flattening roller 112-2.

[0075] When the cooling medium supplied by the cooling medium supply component 3 fills the cooling chamber 2, the winding driving member 113 drives the unwinding roller 112-1, the winding roller 112-3, and the flattening roller 112-2 to rotate for winding and unwinding. During this process, the film between the unwinding roller 112-1 and the winding roller 112-3 is flattened by the flattening roller 112-2, reducing the wrinkles of the film and at the same time accelerating the cooling speed of the film.

[0076] More specifically, on the inner wall of the winding cavity 111, there are relatively arranged a first adjustment mounting table 111-1 and a second adjustment mounting table 111-2; one end of the unwinding roller 112-1 or the winding roller 112-3 is mounted on the first adjustment mounting table 111-1, and the other end of the unwinding roller 112-1 or the winding roller 112-3 is mounted on the second adjustment mounting table 111-2;

[0077] Such as Figure 5 , Figure 6 , Figure 7 As shown, on the first adjustment mounting table 111-1, there is a clamping drive group 10, and the clamping drive group 10 includes an output transmission gear 101 provided at the output end of the winding drive member 113, a roller transmission gear 102 provided at one end of the unwinding roller 112-1 or the winding roller 112-3, a connecting shaft push rod 103 hinged to the first adjustment mounting table 111-1, and a connecting shaft sleeve 104 fixedly connected to the connecting shaft push rod 103. The inner wall of the connecting shaft sleeve 104 is provided with connecting shaft sleeve transmission teeth;

[0078] The connecting shaft push rod 103 can adjust the position of the connecting shaft sleeve 104 relative to the output transmission gear 101 and the roller transmission gear 102, so that the connecting shaft sleeve transmission teeth at both ends of the connecting shaft sleeve 104 are engaged with the connecting shaft sleeve 104 and the roller transmission gear 102.

[0079] Thus, by adjusting the position of the connecting shaft sleeve 104, the output transmission gear 101 and the roller transmission gear 102 can rotate synchronously or the transmission relationship between the output transmission gear 101 and the roller transmission gear 102 can be released.

[0080] More specifically, the clamping drive group 10 further includes a positioning member 105 that can be used to fix the relative position of the connecting shaft push rod 103 and the first adjustment mounting table 111-1. One end of the positioning member 105 is provided on the connecting shaft push rod 103, and the other end of the positioning member 105 can abut against the first adjustment mounting table 111-1; specifically, the positioning member 105 is a screw plug. Rotating the screw plug fixes the position of the connecting shaft push rod 103 relative to the connecting shaft sleeve 104, and prevents the connecting shaft sleeve 104 from disengaging from the output transmission gear 101 and the roller transmission gear 102 when the output end of the winding drive member 113 rotates.

[0081] More specifically, the roller core of the unwinding roller 112-1 or the winding roller 112-3 is an air shaft 112-0, and rolling bearings 112-4 are fixedly connected to the outer peripheral sides at both ends of the air shaft 112-0;

[0082] The mounting table 111-1 is fixedly connected with a first clamping block 81. A second clamping block 82 detachably connected to the first clamping block 81 and a fixing member 83 for fixing the relative positions of the second clamping block 82 and the first clamping block 81 are provided on the first clamping block 81;

[0083] The fixing member 83 penetrates through the first clamping block 81 and the second clamping block 82 to fix the outer ring of the rolling bearing 112-4 between the first clamping block 81 and the second clamping block 82.

[0084] As Figure 8 shown, more specifically, a winding pressure roller 112-5 is provided between the winding roller 112-3 and the flattening roller 112-2, and an unwinding pressure roller 112-6 is provided between the flattening roller 112-2 and the unwinding roller 112-1;

[0085] The film running roller 112 further includes a winding rotating shaft 112-51 and an unwinding rotating shaft 112-61;

[0086] A winding connecting rod 112-52 is fixedly connected to the winding rotating shaft 112-51, and the winding pressure roller 112-5 is connected to the winding rotating shaft 112-51 through the winding connecting rod 112-52;

[0087] A unwinding connecting rod 112-62 is fixedly connected to the unwinding rotating shaft 112-61, and the unwinding pressure roller 112-6 is connected to the unwinding rotating shaft 112-61 through the unwinding connecting rod 112-62.

[0088] The winding rotating shaft 112-51 rotates under the drive of a winding driving member 113 connected to one end thereof, driving the winding pressure roller 112-5 to adjust the distance between the winding pressure roller 112-5 and the winding roller 112-3, so as to adjust the tension of the film between the winding pressure roller 112-5 and the flattening roller 112-2; the unwinding rotating shaft 112-61 rotates under the drive of a winding driving member 113 connected to one end thereof, driving the unwinding pressure roller 112-6 to adjust the distance relative to the unwinding pressure roller 112-6, so as to adjust the tension of the film between the unwinding rotating shaft 112-61 and the flattening roller 112-2, so as to flatten and cool the film and improve the film quality.

[0089] The above is a specific description of the preferred embodiment of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A film cooler, characterized in that: include: A film placement assembly (1) for placing a film (91); A cooling chamber (2) which can be used to accommodate the film placement assembly (1); A cooling medium supply assembly (3), which is in communication with the cooling chamber (2) and can be used to supply cooling medium to the cooling chamber (2); A vacuum pumping component (4) is connected to the cooling chamber (2) and is used to pump out the gas in the cooling chamber (2).

2. The film cooler according to claim 1, characterized in that Also includes: a frame (5); The frame (5) is provided with a mounting member (6), and the film placement assembly (1) is fixedly mounted on the mounting member (6); A transmission assembly (7) for driving the film placement assembly (1) to enter and exit the cooling chamber (2) is provided between the mounting member (6) and the frame (5).

3. The film cooler according to claim 2, characterized in that: The transmission assembly (7) comprises two or more slide rails (71) arranged parallel to each other, a plurality of pulleys (72) slidably arranged on the slide rails (71), a connecting shaft (73) coaxially connecting adjacent pulleys (72), and a driving member (74) drivingly connected to the connecting shaft (73); The slide rail (71) is arranged on the frame (5); The pulley (72) is arranged on the mounting member (6); The connecting shaft (73) is arranged perpendicular to the slide rail (71); The driving member (74) can drive the connecting shaft (73) to rotate along the axial direction of the connecting shaft (73) to drive the mounting member (6) to move on the slide rail (71).

4. The film cooler according to any one of claims 2 or 3, characterized in that: The film placement assembly (1) comprises a winding assembly (11) and a fixing frame (12) for mounting the winding assembly (11); A sliding guide assembly (70) is provided between the fixing frame (12) and the inner wall of the cooling chamber (2), and the sliding guide assembly (70) can be used to guide the direction of the film placement assembly (1) entering and exiting the cooling chamber (2).

5. The film cooler according to claim 4, characterized in that: The winding assembly (11) comprises a winding chamber (111) arranged adjacent to the fixing frame (12), a plurality of film-moving rollers (112) rotatably mounted on the winding chamber (111), and a winding driving member (113) for driving the film-moving rollers (112) to rotate; The fixed end of the winding driving component (113) is arranged on the fixed frame (12), and the output end of the winding driving component (113) passes through the fixed frame (12) and is connected to the film-moving roller (112).

6. The film cooler according to claim 5, characterized in that: The film-feeding roller (112) comprises an unwinding roller (112-1), a flattening roller (112-2) arranged parallel to the unwinding roller (112-1), and a winding roller (112-3) arranged parallel to the flattening roller (112-2); The unwinding roller (112-1) is used for installing a winding core (9) formed by winding the film (91); The flattening roller (112-2) can be used to flatten the film (91) between the unwinding roller (112-1) and the winding roller (112-3); The winding roller (112-3) can be used to receive the film (91) that has been flattened by the flattening roller (112-2).

7. The film cooler according to claim 6, characterized in that: A first adjustment mounting platform (111-1) and a second adjustment mounting platform (111-2) are arranged opposite to each other on the inner wall of the winding chamber (111); the first adjustment mounting platform (111-1) is used for mounting one end of the unwinding roller (112-1) or the winding roller (112-3), and the second adjustment mounting platform (111-2) is used for mounting the other end of the unwinding roller (112-1) or the winding roller (112-3); A clamping drive group (10) is provided on the first adjustment mounting platform (111-1), and the clamping drive group (10) comprises an output transmission gear (101) provided at the output end of the winding drive member (113), a roller transmission gear (102) provided at one end of the unwinding roller (112-1) or the winding roller (112-3), a coupling push rod (103) hingedly arranged with the first adjustment mounting platform (111-1), and a coupling sleeve (104) fixedly connected with the coupling push rod (103); the inner wall of the coupling sleeve (104) is provided with a coupling sleeve transmission gear; The coupling push rod (103) can adjust the position of the coupling sleeve (104) relative to the output transmission gear (101) and the roller transmission gear (102), so that the coupling sleeve transmission teeth at both ends of the coupling sleeve (104) are meshed with the coupling sleeve (104) and the roller transmission gear (102).

8. The film cooler according to claim 7, characterized in that: The clamping drive group (10) also includes a positioning member (105) that can be used to fix the relative position of the coupling push rod (103) and the first adjustment mounting platform (111-1), one end of the positioning member (105) is arranged on the coupling push rod (103) and the other end of the positioning member (105) can be abutted against the first adjustment mounting platform (111-1).

9. The film cooler according to any one of claims 7 or 8, characterized in that: The roller core of the unwinding roller (112-1) or the winding roller (112-3) is an air-expanding shaft (112-0), and rolling bearings (112-4) are fixedly connected to the outer peripheral sides of both ends of the air-expanding shaft (112-0); The mounting platform (111-1) is fixedly connected to a first clamping block (81); the first clamping block (81) is provided with a second clamping block (82) detachably connected to the first clamping block (81), and a fixing member (83) for fixing the relative position of the second clamping block (82) and the first clamping block (81); The fixing member (83) passes through the first clamping block (81) and the second clamping block (82) to fix the outer ring of the rolling bearing (112-4) between the first clamping block (81) and the second clamping block (82).

10. The film cooler according to any one of claims 6 to 8, characterized in that: A winding pressure roller (112-5) is provided between the winding roller (112-3) and the flattening roller (112-2), and an unwinding pressure roller (112-6) is provided between the flattening roller (112-2) and the unwinding roller (112-1); The film-feeding roller (112) further comprises a winding shaft (112-51) and an unwinding shaft (112-61); A winding connecting rod (112-52) is fixedly connected to the winding rotating shaft (112-51), and the winding pressing roller (112-5) is connected to the winding rotating shaft (112-51) via the winding connecting rod (112-52); An unwinding connecting rod (112-62) is fixedly connected to the unwinding rotating shaft (112-61), and the unwinding pressing roller (112-6) is connected to the unwinding rotating shaft (112-61) via the unwinding connecting rod (112-62).

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