Tension control mechanism of micro gravure coating machine

Abstract

The invention provides a tension control mechanism of a micro-gravure coating machine, and relates to the technical field of micro-gravure coating machines. The upper portion of the middle in the rack is fixedly connected with the left side and the right side of a tension adjusting frame, a motor A is fixedly installed on the upper front portion of the left side of the tension adjusting frame, and a rotating shaft of the motor A is fixedly connected with the left side of a bevel gear main rod. The bevel gear main rod is driven by the motor A to rotate, the bevel gear transmission rods on the two sides are driven to rotate synchronously, then the lifting piece is controlled to drive the tension roller to slide up and down, accurate adjustment of the film tension is achieved, the initial tension can be flexibly set according to different production process requirements, and real-time fine adjustment can be achieved in the production process. The problems that an existing micro-gravure coating machine is unstable in tension control, a thin film can be stretched and deformed due to too large tension, the thickness of a wet glue layer is uneven, and then the quality of a dry glue layer is affected are solved; and if the tension is too small, the thin film is easy to wrinkle, deviate and even break.

Description

Technical Field

[0001] This invention relates to the field of microgravure coating machine technology, and in particular to a tension control mechanism for a microgravure coating machine. Background Technology

[0002] Against the backdrop of the rapid development of the new energy industry, lithium batteries, as core energy storage devices, directly determine the reliability of downstream applications through their safety performance and product quality. Cell termination tape, as a crucial internal insulation and protection component of lithium batteries, plays an irreplaceable role in preventing internal short circuits and mitigating the risk of combustion and explosion. In the coating production process of cell termination tape, microgravure coating technology, due to its ability to achieve quantitative adhesive coating, has become a core technical means to ensure the continuous uniformity and precise thickness of the wet adhesive layer. Its typical production process is as follows: first, an emulsion-type acrylic pressure-sensitive adhesive is prepared; then, the adhesive is quantitatively transferred to the surface of a non-silicone release film through a microgravure coating head to form a wet adhesive layer of a preset thickness; after the wet adhesive layer is baked and cured in an oven at high temperature to form a dry adhesive layer, it is precisely bonded to the coated surface of the PET substrate layer; finally, in the post-processing stage, the non-silicone release film is peeled off, and the dry adhesive layer is 100% completely transferred to the PET substrate layer, forming a finished cell termination tape with insulation and protection functions. In this process, from unwinding, coating, and baking of the non-silicone release film to winding it up after bonding with the substrate, the tension stability of the entire film operation directly determines the coating quality. If the tension is not properly controlled, it may result in uneven thickness of the wet adhesive layer, wrinkles or stretching deformation of the dry adhesive layer, or even cause the film to deviate or break, or even cause incomplete transfer of the dry adhesive layer, which seriously affects the insulation performance and safety of the cell termination tape.

[0003] Understanding the application of tension control in existing microgravure coating machines: The tension control of the microgravure coating machine is unstable. Excessive tension will cause the film to stretch and deform, resulting in uneven thickness of the wet adhesive layer, which in turn affects the quality of the dry adhesive layer. Insufficient tension will easily cause the film to wrinkle, deviate, or even break. In severe cases, it will also lead to incomplete transfer of the dry adhesive layer, reduce the insulation performance of the cell termination tape, and increase the risk of internal short circuit and explosion of the lithium battery.

[0004] When the wet adhesive layer enters the oven for baking and curing, traditional drying equipment has a fixed position and cannot dynamically adjust the drying range and distance according to the thickness of the wet adhesive layer and the speed of the film. This can lead to over-drying in some areas and under-drying in others, affecting the curing quality of the dry adhesive layer and thus reducing the overall performance of the cell termination tape.

[0005] During film transport, the lack of an effective centering and correction mechanism can easily cause the film to shift to the left or right. This not only causes the coating position to deviate from the preset trajectory, resulting in uneven coating of the wet adhesive layer, but also causes uneven winding during winding, increasing the difficulty of subsequent processes and reducing production efficiency.

[0006] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a tension control mechanism for a micro-groove coating machine, in order to achieve a more practical purpose. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a tension control mechanism for a microgravure coating machine. This mechanism solves the problems of unstable tension control in existing microgravure coating machines, excessive tension leading to film stretching and deformation, uneven wet adhesive layer thickness, and consequently affecting the quality of the dry adhesive layer; and insufficient tension causing film wrinkles, deviation, or even breakage. It also addresses the issues of fixed positions in traditional drying equipment, the inability to dynamically adjust the drying range based on wet adhesive layer thickness and film running speed, insufficient drying distance, and the lack of an effective centering correction mechanism during film transport, resulting in lateral film deviation.

[0008] This invention provides a tension control mechanism for a micro-grooving coating machine, specifically comprising: a frame; the upper middle position of the frame is fixedly connected to the left and right sides of a tension adjusting frame; a motor A is fixedly installed at the upper left front position of the tension adjusting frame; the rotating shaft of motor A is fixedly connected to the left side of a bevel gear main rod; a bevel gear is respectively provided on both sides of the bevel gear main rod; a lifting frame is fixedly installed at the lower left and right sides of the tension adjusting frame; the two lifting frames are located at the upper sides of the frame; a lifting component is slidably connected to the interior of each lifting frame; the inner sides of the two lifting components are rotatably connected to the left and right sides of a tension roller; a threaded hole is provided at the top front position of each lifting component; a bevel gear transmission rod is rotatably connected to the interior front position of each lifting frame; each bevel gear transmission rod is threaded; and the two bevel gear transmission rods are respectively connected to the threaded holes of a lifting component; the bevel gears on both sides of the bevel gear main rod are engaged with the upper position of a bevel gear transmission rod.

[0009] Furthermore, a limiting rod A is rotatably connected to the upper rear position inside the frame, and a limiting rod B is rotatably connected to the upper front position inside the frame. The tension roller is located at the midpoint between the limiting rod A and the limiting rod B. A main guide rod is rotatably connected to the lower front position inside the frame, and the main guide rod is located directly below the limiting rod B. An auxiliary guide rod is also rotatably connected to the lower front position inside the frame, and the auxiliary guide rod is located directly in front of the main guide rod.

[0010] Furthermore, a winding frame is provided at the front end of the frame, a limiting roller is provided at the rear end of the winding frame, and an inclined roller is provided at the rear inclined surface of the winding frame, with the inclined roller located above the limiting roller. A sliding groove is provided on the left and right sides of the top of the winding frame, and a chuck is slidably connected in each of the two sliding grooves of the winding frame. The left and right sides of the insertion rod are connected through the middle of the two chucks, and the insertion rod is inserted into the inside of the winding drum.

[0011] Furthermore, threaded holes are provided at the rear positions of the two slides of the winding frame, and an adjusting screw is rotatably connected to each of the two threaded holes of the winding frame. Each adjusting screw is rotatably connected to the rear position of a chuck component, and the two adjusting screws are respectively located in the two slides of the winding frame.

[0012] Furthermore, a take-up frame is placed at the front of the frame, a conveyor frame A is set at the top front of the take-up frame, and a conveyor frame B is set at the top rear of the take-up frame. The conveyor frame B is located at the lower inner side of the take-up frame. A cylinder is rotatably installed at the upper right side of the take-up frame, and the other end of the cylinder is rotatably connected to the middle right side of the conveyor frame B.

[0013] Furthermore, a drying rack is fixedly installed at the top front position of the frame, a notch is provided at the middle position above the front end of the drying rack, and a limiting frame is fixedly installed in the notch of the drying rack, and a motor B is fixedly installed at the upper rear end position of the limiting frame.

[0014] Furthermore, the rotating shaft of motor B is fixedly connected to the inner rear end of the cam frame, and the inner outer side of the cam frame is rotatably connected to the top of the transmission arm. The cam frame is located in front of the limiting frame.

[0015] Furthermore, a sliding member is slidably connected to the lower part of the inner side of the limiting frame. The top of the sliding member is rotatably connected to the bottom of the transmission arm, and the bottom of the sliding member is fixedly connected to the middle of the top of the dryer. The left and right sides of the dryer are slidably connected to the lower front of the drying frame. The dryer is located in front of the limiting rod B and the main guide rod.

[0016] Furthermore, a centering frame is provided at the front of the frame, located directly behind the winding frame. A motor C is fixedly installed on the left side of the centering frame. The shaft of motor C has reverse threads on both sides, and the shaft of motor C is located inside the centering frame. A counter-frame is slidably connected to the left and right sides of the centering frame, and each counter-frame has a threaded hole on its lower side. The reverse threads of the shaft of motor C are located in the threaded holes of one of the counter-frames. An elastic adapting frame is elastically slidably located on the upper inner side of each counter-frame, and a motor D is fixedly installed on the upper inner side of each elastic adapting frame.

[0017] Furthermore, the shaft of the motor D is threaded, and an auxiliary frame is slidably connected to the lower inner side of each elastic adaptation frame. An auxiliary roller is rotatably connected to the inner side of the auxiliary frame. A threaded hole is opened at the top center of the auxiliary frame, and the shaft of the motor D is located in the threaded hole of the auxiliary frame. The two auxiliary rollers are symmetrically distributed.

[0018] Compared with the prior art, the present invention has the following beneficial effects: Motor A drives the bevel gear main rod to rotate, which in turn drives the bevel gear transmission rods on both sides to rotate synchronously. This, in turn, controls the lifting component to move the tension roller up and down, achieving precise adjustment of film tension. The initial tension can be flexibly set according to different production process requirements, and can be finely adjusted in real time during production. This effectively avoids problems such as film stretching deformation, wrinkles, deviation, and breakage caused by improper tension, ensuring uniform wet adhesive layer thickness and complete dry adhesive layer transfer, and improving the insulation performance and safety of the battery cell termination tape.

[0019] In addition, the design of the bevel gear main rod and the bevel gear transmission rods on both sides ensures the synchronicity of the tension rollers when they are raised and lowered, further improving the stability and reliability of tension control and providing a strong guarantee for high-quality coating.

[0020] The dryer on the drying rack can slide up and down through the coordinated action of motor B, cam frame, transmission arm and sliding parts. By adjusting the speed of motor B, the lifting frequency and amplitude of the dryer can be controlled, thereby dynamically adjusting the drying range and distance according to the thickness of the wet adhesive layer and the film running speed, ensuring uniform and efficient drying of the wet adhesive layer, avoiding over-drying or under-drying, significantly improving the curing quality of the dry adhesive layer, and enhancing the performance stability of the battery cell termination tape. The design of the dryer slidingly connected to the drying rack makes its operation smooth and the drying position precise, further optimizing the drying effect.

[0021] The centering frame is equipped with motor C, whose shaft has reverse threads on both sides, which can drive the opposing frames on both sides to move closer or further apart synchronously. Combined with the elastic adapting frame and the auxiliary roller, it can automatically adjust the spacing between the opposing frames according to the film width, so that the auxiliary roller fits the two sides of the film. At the same time, the height of the auxiliary frame can be adjusted by motor D, which can control the contact pressure between the auxiliary roller and the film, realizing automatic centering and correction of the film. This design effectively prevents the film from shifting to the left or right during the conveying process, ensures the accuracy of the coating position and the neatness of the winding, reduces the processing difficulty of subsequent processes, and improves the overall production efficiency.

[0022] The chuck on the winding frame can slide within the groove via an adjusting screw, facilitating adjustment of the distance between the insert rod and the inclined roller. This allows for real-time adjustment of the winding tension, preventing uncontrollable tension. After winding is complete, the cylinder on the take-up frame is activated to adjust the angle of conveyor frame B, smoothly transferring the winding drum to conveyor frame A. This achieves automated unloading, reducing manual labor intensity and minimizing the risks associated with operational errors. The entire winding and unloading process requires minimal manual intervention, effectively shortening the production cycle, improving production continuity and overall efficiency, and reducing production costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0024] In the attached diagram: Figure 1 A schematic diagram of the left-side structure of a micro-concave coating machine according to an embodiment of the present invention is shown; Figure 2 A side view of the micro-groove coating machine according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the overall left-side structure of the rack according to an embodiment of the present invention is shown; Figure 4 A schematic side view of the overall frame structure according to an embodiment of the present invention is shown; Figure 5 A schematic side view of the overall structure of the tension adjustment frame according to an embodiment of the present invention is shown; Figure 6 A schematic side view of the overall structure of the drying rack according to an embodiment of the present invention is shown; Figure 7 A schematic side view of the overall structure of the centering frame according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of the tension control mechanism of a microgravure coating machine according to an embodiment of the present invention is shown.

[0025] List of reference numerals 1. Frame; 101. Limiting rod A; 102. Limiting rod B; 103. Main guide rod; 104. Auxiliary guide rod; 105. Take-up frame; 106. Limiting roller; 107. Inclined roller; 108. Chuck assembly; 109. Insert rod; 110. Adjusting screw; 111. Take-up drum; 2. Tension adjusting frame; 201. Motor A; 202. Bevel gear main rod; 203. Lifting frame; 204. Bevel gear transmission rod; 205. Lifting component; 206. Tension roller; 3. Drying rack; 301. Limiting rack; 302. Motor B; 303. Cam rack; 304. Drive arm; 305. Sliding component; 306. Dryer; 4. Centering rack; 401. Motor C; 402. Opposing rack; 403. Elastic adaptation rack; 404. Motor D; 405. Auxiliary rack; 406. Auxiliary roller; 5. Receiving rack; 501. Conveyor rack A; 502. Conveyor rack B; 503. Cylinder component. Detailed Implementation

[0026] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0027] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of this disclosure shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should also be understood that terms such as those defined in a common dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as being interpreted in an idealized or highly formalized sense, unless expressly defined in the embodiments of this disclosure.

[0028] The terms "first," "second," and similar words used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a," "one," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Likewise, the terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. In the following description, spatial and directional terms such as "upper," "lower," "front," "rear," "top," "bottom," "vertical," and "horizontal" may be used to describe embodiments of this disclosure; however, it should be understood that these terms are only for the convenience of describing the embodiments shown in the figures and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connected," "joined," "fixed," and "attached" can refer to a direct connection between two elements or structures without other elements or structures, or to an indirect connection between two elements or structures via an intermediate element or structure, unless otherwise expressly stated herein.

[0029] Example: As attached Figure 1 To be continued Figure 8 As shown: This invention provides a tension control mechanism for a micro-groove coating machine, comprising: a frame 1; a tension adjusting frame 2 is fixedly connected to the upper center of the frame 1 on both sides; a motor A201 is fixedly installed on the upper left front side of the tension adjusting frame 2; the shaft of the motor A201 is fixedly connected to the left side of the bevel gear main rod 202; a bevel gear is respectively provided on both sides of the bevel gear main rod 202; and a lifting frame 203 is fixedly installed on the lower left and right sides of the tension adjusting frame 2. The two lifting frames 203 are located on the upper sides of the frame 1. Each lifting frame 203... Each of the two lifting components 205 is slidably connected to an internal position. The inner sides of the two lifting components 205 are rotatably connected to the left and right sides of a tension roller 206, respectively. Each lifting component 205 has a threaded hole at the top front position. Each lifting frame 203 has a bevel gear transmission rod 204 rotatably connected to the inner front position. Each bevel gear transmission rod 204 has a threaded rod body, and the two bevel gear transmission rods 204 are respectively connected to the threaded hole of a lifting component 205. The bevel gear positions on both sides of the bevel gear main rod 202 are engaged with the upper position of a bevel gear transmission rod 204.

[0030] Among them, a limit rod A101 is rotatably connected to the upper rear position inside the frame 1, and a limit rod B102 is rotatably connected to the upper front position inside the frame 1. The tension roller 206 is located at the midpoint between the limit rods A101 and B102. A main guide rod 103 is rotatably connected to the lower front position inside the frame 1. The main guide rod 103 is located directly below the limit rod B102. An auxiliary guide rod 104 is also rotatably connected to the lower front position inside the frame 1. The auxiliary guide rod 104 is located directly in front of the main guide rod 103.

[0031] The frame 1 has a take-up frame 105 at the front end, a limit roller 106 at the rear end of the take-up frame 105, and an inclined roller 107 at the rear inclined surface of the take-up frame 105. The inclined roller 107 is located above the limit roller 106. The top left and right sides of the take-up frame 105 are respectively provided with a sliding groove, and a chuck 108 is slidably connected in each of the two sliding grooves of the take-up frame 105. The middle position of the two chucks 108 is connected to the left and right sides of the insertion rod 109, and the insertion rod 109 is inserted into the inside of the take-up drum 111.

[0032] The winding frame 105 has threaded holes at the rear of its two slides, and each of the two threaded holes is rotatably connected to an adjusting screw 110. Each adjusting screw 110 is rotatably connected to the rear of a chuck 108, and the two adjusting screws 110 are located in the two slides of the winding frame 105 respectively.

[0033] The receiver 5 is placed at the front of the frame 1. A conveyor A501 is set at the top front of the receiver 5. A conveyor B502 is set at the top rear of the receiver 5. The conveyor B502 is located at the lower inner side of the winding frame 105. A cylinder 503 is rotatably installed at the upper right side of the receiver 5. The other end of the cylinder 503 is rotatably connected to the middle right side of the conveyor B502.

[0034] The drying rack 3 is fixedly installed at the top front position of the frame 1. A notch is provided at the middle position above the front end of the drying rack 3. A limiting frame 301 is fixedly installed in the notch of the drying rack 3. A motor B302 is fixedly installed at the upper rear end position of the limiting frame 301.

[0035] The rotating shaft of motor B302 is fixedly connected to the inner rear end of cam frame 303, and the inner outer side of cam frame 303 is rotatably connected to the top of transmission arm 304. Cam frame 303 is located in front of restraint frame 301.

[0036] The limiting frame 301 has a sliding member 305 slidably connected to the lower part of the interior. The top of the sliding member 305 is rotatably connected to the bottom of the transmission arm 304. The bottom of the sliding member 305 is fixedly connected to the middle of the top of the dryer 306. The left and right sides of the dryer 306 are slidably connected to the lower front of the drying rack 3. The dryer 306 is located in front of the limiting rod B102 and the main guide rod 103.

[0037] The frame 1 has a centering frame 4 located at the front and behind the take-up frame 105. A motor C401 is fixedly installed on the left side of the centering frame 4. The shaft of the motor C401 has reverse threads on both sides and is located inside the centering frame 4. A counter-frame 402 is slidably connected to the left and right sides of the centering frame 4. Each counter-frame 402 has a threaded hole on its lower side. The reverse threads of the motor C401 shaft are located in the threaded holes of the counter-frame 402. An elastic adapting frame 403 is elastically slidably installed on the upper inner side of each counter-frame 402. A motor D404 is fixedly installed on the upper inner side of each elastic adapting frame 403.

[0038] The motor D404 has a threaded shaft. Each elastic adaptation frame 403 has an auxiliary frame 405 slidably connected to its inner lower position. An auxiliary roller 406 is rotatably connected to the inner position of the auxiliary frame 405. A threaded hole is opened at the top center of the auxiliary frame 405. The motor D404's shaft is located in the threaded hole of the auxiliary frame 405. The two auxiliary rollers 406 are symmetrically distributed.

[0039] When using: The non-silicone release film is drawn from the unwinding position, passes in sequence above the limiting rod A101, below the tension roller 206, above the limiting rod B102, in front of the main guide rod 103, and behind the auxiliary guide rod 104 in the frame 1. It then passes above the space between the two auxiliary rollers 406 in the centering frame 4, and finally passes below the inclined roller 107 and above the limiting roller 106 in the take-up frame 105, and is guided to a position on the outside of the take-up drum 111.

[0040] Start motor A201, set tension parameters according to production process requirements, motor A201 drives bevel gear main rod 202 to rotate, bevel gear main rod 202 drives the two bevel gear transmission rods 204 to rotate through its own bevel gear meshing, driving the lifting component 205 to slide up and down in the lifting frame 203, thereby adjusting the height of tension roller 206 and preset the initial tension of the film. When tightening is required, tension roller 206 needs to move downwards, and when loosening is required, tension roller 206 needs to move upwards. At the same time, bevel gear main rod 202, through the cooperation of the two bevel gear transmission rods 204, makes the two sides of tension roller 206 move up and down synchronously.

[0041] Drying settings: The dryer 306 is started according to the thickness of the wet adhesive layer and the drying requirements. The dryer 306 dries the film at the rear position. During this process, the motor B302 is started and the speed of the motor B302 is adjusted so that it drives the cam frame 303 to rotate. Through the transmission arm 304, the sliding member 305 is pushed to slide up and down in the limiting frame 301, thereby controlling the lifting frequency and amplitude of the dryer 306. This ensures that the dryer 306 dries the wet adhesive layer film evenly and efficiently, and can also increase the drying range.

[0042] Centered design: Start motor C401, adjust the spacing of opposing frames 402 according to the film width, and drive the opposing frames 402 on both sides to move closer or further away synchronously, so that the upper inner side of the auxiliary frame 405 is in contact with both sides of the film. Next, start the two motors D404 and adjust the height of the two auxiliary frames 405 so that the top of the two auxiliary rollers 406 maintains appropriate contact pressure with the bottom sides of the film, thus completing the centering correction parameter setting.

[0043] Collection process: The insertion rod 109 is rotated to drive the take-up drum 111 to wind up the film. This is the current winding method. The adjusting screw 110 is rotated in conjunction with the rear end of the take-up drum 111. The adjusting screw 110, in conjunction with the two threaded holes of the take-up frame 105, allows the chuck 108 to be adjusted in the groove of the take-up frame 105, thereby adjusting the distance between the insertion rod 109 and the inclined roller 107 to prevent the tension of the take-up drum 111 from being unadjustable when winding the film.

[0044] During the production process, the film tension, running status, and dry adhesive layer quality are monitored in real time. If abnormal film tension is detected, the tension is stabilized by adjusting the speed of motor A201 and fine-tuning the height of tension roller 206. If the film deviates from its intended path, motor C401 can be fine-tuned to correct the position of the opposing frame 402 and ensure that the film runs in the center.

[0045] When the winding drum 111 finishes winding, stop the winding drive, start the cylinder 503 of the take-up frame 5 to extend, adjust the angle of the conveyor frame B502 so that the top rear position of the conveyor frame B502 is in contact with the winding drum 111, release the chuck 108, and pull out the insertion rod 109. At this time, the winding drum 111 is transferred to the top of the conveyor frame A501 through the conveyor frame B502, which facilitates subsequent unloading and improves the efficiency of manual transfer.

[0046] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. The scope of protection of this disclosure shall be determined by the scope of the claims.

Claims

1. A tension control mechanism for a microgravure coating machine, characterized in that, include: The frame (1) is fixedly connected to the upper middle position of the frame (1) and the left and right sides of the tension adjustment frame (2). A motor A (201) is fixedly installed on the upper left front position of the tension adjustment frame (2). The rotating shaft of the motor A (201) is fixedly connected to the left side of the bevel gear main rod (202). A bevel gear is provided on each side of the bevel gear main rod (202). A lifting frame (203) is fixedly installed on the left and right sides of the bottom of the tension adjustment frame (2). The two lifting frames (203) are located on the upper sides of the frame (1). The internal position of each lifting frame (203) is slidably connected. There is a lifting component (205). The inner sides of the two lifting components (205) are rotatably connected to the left and right sides of a tension roller (206). Each lifting component (205) has a threaded hole at the top front position. Each lifting frame (203) is rotatably connected to a bevel gear transmission rod (204) at the inner front position. Each bevel gear transmission rod (204) has a threaded rod body. The two bevel gear transmission rods (204) are respectively connected to the threaded hole of a lifting component (205). The bevel gear positions on both sides of the bevel gear main rod (202) are engaged with the upper position of a bevel gear transmission rod (204).

2. The tension control mechanism for a microgravure coating machine as described in claim 1, characterized in that: The frame (1) is rotatably connected to a limiting rod A (101) at the upper rear position inside, and to a limiting rod B (102) at the upper front position inside. The tension roller (206) is located at the midpoint between the limiting rod A (101) and the limiting rod B (102). The frame (1) is rotatably connected to a main guide rod (103) at the lower front position inside, and the main guide rod (103) is located directly below the limiting rod B (102). The frame (1) is also rotatably connected to an auxiliary guide rod (104) at the lower front position inside, and the auxiliary guide rod (104) is located directly in front of the main guide rod (103).

3. The tension control mechanism for a microgravure coating machine as described in claim 1, characterized in that: The front end of the frame (1) is provided with a winding frame (105), the rear end of the winding frame (105) is provided with a limiting roller (106), the rear end of the winding frame (105) is provided with an inclined roller (107), the inclined roller (107) is located above the limiting roller (106), the top left and right sides of the winding frame (105) are respectively provided with a sliding groove, and a chuck (108) is slidably connected in the two sliding grooves of the winding frame (105). The middle position of the two chucks (108) is connected to the left and right sides of the insertion rod (109), and the insertion rod (109) is inserted into the inside of the winding drum (111).

4. The tension control mechanism for a microgravure coating machine as described in claim 3, characterized in that: The winding frame (105) has threaded holes at the rear of its two slides, and each of the two threaded holes of the winding frame (105) is rotatably connected to an adjusting screw (110). Each adjusting screw (110) is rotatably connected to the rear of a chuck (108), and the two adjusting screws (110) are located in the two slides of the winding frame (105).

5. The tension control mechanism for a microgravure coating machine as described in claim 1, characterized in that: A take-up frame (5) is placed at the front of the frame (1). A conveyor frame A (501) is set at the top front of the take-up frame (5). A conveyor frame B (502) is set at the top rear of the take-up frame (5). The conveyor frame B (502) is located at the lower inner side of the take-up frame (105). A cylinder component (503) is rotatably installed at the upper right side of the take-up frame (5). The other end of the cylinder component (503) is rotatably connected to the middle right side of the conveyor frame B (502).

6. The tension control mechanism for a microgravure coating machine as described in claim 1, characterized in that: A drying rack (3) is fixedly installed at the top front position of the frame (1). A notch is provided at the middle position above the front end of the drying rack (3), and a limiting frame (301) is fixedly installed in the notch of the drying rack (3). A motor B (302) is fixedly installed at the upper rear end position of the limiting frame (301).

7. The tension control mechanism for a microgravure coating machine as described in claim 6, characterized in that: The rotating shaft of the motor B (302) is fixedly connected to the inner rear end of the cam frame (303), and the inner outer side of the cam frame (303) is rotatably connected to the top of the transmission arm (304). The cam frame (303) is located in front of the limiting frame (301).

8. The tension control mechanism for a microgravure coating machine as described in claim 7, characterized in that: The lower part of the limiting frame (301) is slidably connected to a sliding member (305). The top of the sliding member (305) is rotatably connected to the bottom of the transmission arm (304). The bottom of the sliding member (305) is fixedly connected to the middle of the top of the dryer (306). The left and right sides of the dryer (306) are slidably connected to the lower front of the drying rack (3). The dryer (306) is located in front of the limiting rod B (102) and the main guide rod (103).

9. The tension control mechanism for a microgravure coating machine as described in claim 1, characterized in that: A centering frame (4) is provided at the front of the frame (1). The centering frame (4) is located directly behind the winding frame (105). A motor C (401) is fixedly installed on the left side of the centering frame (4). The shaft of the motor C (401) is provided with reverse threads on both sides. The shaft of the motor C (401) is located inside the centering frame (4). A counter-frame (402) is slidably connected to the left and right sides of the centering frame (4). A threaded hole is provided on the lower side of each counter-frame (402). The reverse thread of the shaft of the motor C (401) is located in the threaded hole of a counter-frame (402). An elastic adapting frame (403) is elastically slidably on the upper inner side of each counter-frame (402). A motor D (404) is fixedly installed on the upper inner side of each elastic adapting frame (403).

10. The tension control mechanism for a microgravure coating machine as described in claim 9, characterized in that: The motor D (404) has a threaded shaft. Each elastic adaptor (403) has an auxiliary frame (405) slidably connected to its inner lower position. An auxiliary roller (406) is rotatably connected to the inner position of the auxiliary frame (405). A threaded hole is opened at the top middle position of the auxiliary frame (405). The motor D (404) has a shaft located in the threaded hole of the auxiliary frame (405). The two auxiliary rollers (406) are symmetrically distributed.

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