Anti-shake device for flattening

Abstract

The application relates to a flattening anti-shaking device. The flattening anti-shaking device comprises a base plate, a vacuum adsorption table and at least two flattening compression roller assemblies. The vacuum adsorption table is installed on the base plate, and the vacuum adsorption table is provided with a negative pressure adsorption cavity and an adsorption surface. The adsorption surface is provided with a plurality of adsorption holes, the adsorption holes are communicated with the negative pressure adsorption cavity, and the vacuum adsorption table is arranged in at least two in the base material width direction. The two flattening compression roller assemblies are suspended on the vacuum adsorption tables at the two ends in the base material width direction. The flattening compression roller assembly comprises a rotating compression roller, a gap is arranged between the compression roller and the adsorption surface, the rotating direction of the compression roller and the conveying direction of the base material form a flattening included angle, and the flattening included angle is less than or equal to ninety degrees. The flattening anti-shaking device can relieve the phenomenon of base material shaking in the process of pole piece coating, improve the distance stability between the lip and the base material during secondary coating of the reverse surface coating die, and improve the coating quality.

Description

Technical Field

[0001] This application relates to the field of film and foil conveying, flattening, and anti-vibration technology, and in particular to flattening and anti-vibration devices. Background Technology

[0002] Simultaneously coating both sides of the lithium battery electrode, the coating machine uses one die head to coat the front side of the substrate, and then the second die head to coat the back side of the substrate.

[0003] Electrodes with wet slurry on both sides are pulled into a suspension oven for drying by a rear-end power source; alternatively, an air flotation platform is installed before the coated electrode enters the drying oven to keep the coated electrode in a suspended state to prevent the liquid coating at the bottom of the electrode from touching the equipment and affecting the coating quality. Then the electrode is pulled into the suspension oven for drying by a rear-end power source.

[0004] Regardless of whether an air flotation platform is installed before entering the suspension oven, the hot air acting on both sides of the wet electrode will impact the electrode surface. This impact will cause the electrode to shake and fluctuate, and will be transmitted to the reverse coating interface of the second die head, resulting in changes in the coating gap and thus affecting the coating quality. Summary of the Invention

[0005] Based on this, a flattening and anti-vibration device is provided to alleviate the phenomenon of substrate vibration during electrode coating, improve the stability of the distance between the lip and the substrate during the secondary coating of the reverse coating die, and improve the coating quality.

[0006] Embodiments of this application disclose a flattening anti-shake device, comprising:

[0007] Baseboard; and

[0008] A vacuum adsorption stage is installed on the base plate. The vacuum adsorption stage is provided with a negative pressure adsorption cavity and an adsorption surface. The adsorption surface is provided with a plurality of adsorption holes. The adsorption holes are connected to the negative pressure adsorption cavity. At least two vacuum adsorption stages are arranged along the width direction of the substrate.

[0009] At least two flattening roller assemblies are provided, and the two flattening roller assemblies are suspended on the vacuum adsorption stage at both ends of the width direction of the substrate. Each flattening roller assembly includes a rotating roller, and a gap is provided between the roller and the adsorption surface. The rotation direction of the roller forms a flattening angle with the conveying direction of the substrate, and the flattening angle is less than or equal to ninety degrees.

[0010] In one embodiment, the vacuum adsorption stage includes:

[0011] A vacuum stage, wherein the vacuum stage is provided with a vacuum groove;

[0012] A vacuum adsorption plate is provided, which covers the vacuum groove. The vacuum adsorption plate and the vacuum groove together form the negative pressure adsorption cavity. The vacuum adsorption plate has a plurality of adsorption holes, which are connected to the negative pressure adsorption cavity.

[0013] In one embodiment, the vacuum adsorption plate is provided with a sealing ring, which is sealed between the vacuum adsorption plate and the vacuum stage.

[0014] In one embodiment, the vacuum adsorption stage is equipped with a throttling valve, and the negative pressure adsorption chamber is connected to a vacuum pumping device through the throttling valve.

[0015] In one embodiment, the flattening roller assembly further includes:

[0016] Lifting platform; and

[0017] An adjustable pressure roller mounting plate is mounted on the lifting plate and its position on the lifting plate is adjustable along the width direction of the substrate. The pressure roller is mounted on the adjustable pressure roller mounting plate.

[0018] A lifting cylinder is connected between the base plate and the lifting plate, driving the lifting plate and the adjustable pressure roller mounting plate to move, thereby moving the pressure roller away from or closer to the adsorption surface.

[0019] In one embodiment, a guide mechanism is provided between the lifting plate and the base plate. The guide mechanism includes a guide rod disposed on the base plate, the guide rod being slidably connected to a guide sleeve, and the guide sleeve being fixedly connected to the lifting plate.

[0020] In one embodiment, the adjustable pressure roller mounting plate is provided with a guide sleeve, a guide shaft is provided inside the guide sleeve, the guide shaft is rotatably connected to the pressure roller, and a buffer spring is provided between the guide shaft and the adjustable pressure roller mounting plate;

[0021] The flattening and anti-shaking device also includes a planar linkage mechanism, which is installed between the guide shaft and the adjustable pressure roller mounting plate to adjust the flattening angle.

[0022] In one embodiment, the planar linkage mechanism includes:

[0023] An adjusting plate, which is fixedly connected to the guide shaft;

[0024] A fixing screw, which is threaded onto the adjustable pressure wheel mounting plate;

[0025] A sliding groove is provided at the end of the adjusting plate. When the adjusting plate rotates relative to the adjustable pressure wheel mounting plate, the fixing screw slides relative to the sliding groove. When the fixing screw is tightened, the adjusting plate and the adjustable pressure wheel mounting plate are fixed relative to each other.

[0026] In one embodiment, each of the flattening roller assemblies includes a plurality of rollers, the adjusting plate is fixedly connected to the guide shaft of one of the rollers, and the planar linkage mechanism further includes:

[0027] A follower plate, which is fixedly connected to the guide shaft of the other pressure rollers;

[0028] A connecting rod push plate is hinged to the adjusting plate and the follower plate, respectively.

[0029] In one embodiment, the base plate is provided with a mounting surface, the base plate is formed by bending 304 stainless steel sheet metal, and the mounting surface is ground after bending; and / or

[0030] The adsorption surface is made of polytetrafluoroethylene.

[0031] According to the embodiments of this application, the flattening and anti-vibration device can be applied to the double-sided coating of electrode sheets. When the flattening and anti-vibration device is working, the blank area of ​​the coating substrate is adsorbed by the negative pressure adsorption chamber through the adsorption holes, and slides along the adsorption surface of the vacuum adsorption table under the power traction of the rear end. In this way, the substrate vibration caused by the rear air flotation roller or air knife is eliminated by vacuum adsorption. At the same time, the two flattening rollers extend outward, and the substrate can be extended outward in the width direction of the coating substrate under the action of the two flattening rollers to prevent wrinkling and shrinkage. This provides good substrate coating conditions for the next stage of reverse coating, thereby alleviating the phenomenon of substrate vibration during the electrode sheet coating process, improving the stability of the distance between the lip and the substrate during the secondary coating of the reverse coating die, and improving the coating quality. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a flattening and anti-shaking device according to an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the vacuum adsorption stage in a flattening and anti-shaking device according to an embodiment of this application;

[0034] Figure 3 This is a cross-sectional view of the vacuum adsorption stage in a flattening and anti-shaking device according to an embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the structure of the flattening pressure roller assembly in a flattening anti-shaking device according to an embodiment of this application;

[0036] Figure 5 This is a schematic diagram of the flattening pressure roller assembly from another perspective in a flattening anti-shake device according to an embodiment of this application;

[0037] Figure 6 This is a schematic diagram of the structure of the flattening pressure roller assembly in the flattening anti-shaking device according to an embodiment of this application, in which the angle of the pressure roller is adjusted by a planar linkage mechanism;

[0038] Figure 7 This is a schematic diagram from another perspective of the structure of the flattening pressure roller assembly in the flattening anti-shaking device according to an embodiment of this application, which adjusts the angle of the pressure roller through a planar linkage mechanism.

[0039] Figure label:

[0040] 1. Base plate; 10. Mounting surface;

[0041] 2. Vacuum adsorption stage; 20. Vacuum stage; 201. Negative pressure adsorption chamber; 202. Vacuum adsorption plate; 2021. Adsorption surface; 2022. Adsorption hole; 203. Sealing ring; 204. Throttling valve; 205. Movable mounting plate; 2051. Movable mounting hole;

[0042] 3. Flattening pressure roller assembly; 301. Lifting plate; 302. Adjustable pressure roller mounting plate; 3021. Elongated hole; 303. Guide sleeve; 304. Buffer spring; 305. Guide shaft; 306. Pressure roller; 307. Guide mechanism; 3071. Guide rod; 3072. Guide sleeve; 308. Lifting cylinder;

[0043] 4. Planar linkage mechanism; 40. Base material; 401. Adjusting plate; 402. Linkage push plate; 403. Follower plate; 404. Fixing screw; 405. Adjusting plate shaft; 406. Slide groove. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0050] Typically, the coating process of a double-sided simultaneous coating machine for lithium battery electrodes involves first coating the front side of the substrate with a first die head, and then coating the back side of the substrate with a second die head.

[0051] Electrodes with wet slurry on both sides are pulled into a suspension oven for drying by a rear-end power source; alternatively, an air flotation platform is installed before the coated electrode enters the drying oven to keep the coated electrode in a suspended state to prevent the liquid coating at the bottom of the electrode from touching the equipment and affecting the coating quality. Then the electrode is pulled into the suspension oven for drying by a rear-end power source.

[0052] Regardless of whether an air flotation platform is installed before entering the suspension oven, the hot air acting on both sides of the wet electrode will impact the surface of the electrode. This impact will cause the electrode to shake and fluctuate, and will be transmitted to the reverse coating interface of the second die head, causing changes in the coating gap and thus affecting the coating quality.

[0053] Generally, reducing substrate or electrode vibration is achieved by adding rollers with wrapping angles to isolate the vibration. However, electrodes with wet surfaces on both sides cannot be supported by these rollers, resulting in an unstable suspended electrode. During coating, a constant distance exists between the lip of the extrusion die and the substrate to be coated. This distance is determined by factors such as the electrode's areal density and solid content, and once these factors are determined, this distance cannot change during coating. A constant coating distance between the first die and the front side of the substrate can be achieved by covering the substrate with the reference roller. However, the distance between the second die and the substrate on the back side of the substrate, where the substrate is suspended in the oven or air flotation platform, is unstable. Transforming this unstable state into a fixed state is a pressing technical challenge.

[0054] This application provides a flattening and anti-vibration device to alleviate substrate vibration during electrode coating, improve the stability of the distance between the lip and the substrate during secondary coating of the reverse coating die, and improve coating quality. (See reference...) Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a flattening and anti-shake device according to an embodiment of this application. Figure 2This is a schematic diagram of the structure of the vacuum adsorption stage 2 in a flattening and anti-shaking device according to an embodiment of this application. The embodiment of this application proposes a flattening and anti-shaking device, including a base plate 1, a vacuum adsorption stage 2, and at least two flattening pressure roller assemblies 3. The vacuum adsorption stage 2 is installed on the base plate 1. The vacuum adsorption stage 2 is provided with a negative pressure adsorption cavity 201 and an adsorption surface 2021. The adsorption surface 2021 is provided with a plurality of adsorption holes 2022. The adsorption holes 2022 are connected to the negative pressure adsorption cavity 201. At least two vacuum adsorption stages 2 are arranged along the width direction of the substrate. The two flattening pressure roller assemblies 3 are suspended on the vacuum adsorption stages 2 at the two ends of the width direction of the substrate. The flattening pressure roller assembly 3 includes a rotating pressure roller 306. A gap is provided between the pressure roller 306 and the adsorption surface 2021. The rotation direction of the pressure roller 306 forms a flattening angle with the conveying direction of the substrate. The flattening angle is less than or equal to ninety degrees.

[0055] like Figure 1 As shown in the figure, the X direction is the width direction of the substrate in this application, the Y direction is the conveying direction of the substrate in this application, and the X, Y, and Z directions are perpendicular to each other.

[0056] Specifically, the base plate 1 spans the width direction of the coated substrate 40. In some embodiments, the pressure roller 306 can be a rubber pressure roller 306, which has a certain degree of flexibility.

[0057] According to the embodiments of this application, the flattening and anti-vibration device can be applied to the double-sided coating of electrode sheets. When the flattening and anti-vibration device is working, the blank area of ​​the coating substrate 40 is adsorbed by the negative pressure adsorption chamber 201 through the adsorption hole 2022, and slides along the adsorption surface 2021 of the vacuum adsorption table 2 under the power traction of the rear end. In this way, the substrate vibration caused by the rear air float roller or air knife is eliminated by vacuum adsorption. At the same time, the two flattening rollers extend outward. In the width direction of the coating substrate 40, the substrate can be extended outward under the action of the two flattening rollers to prevent wrinkling and shrinkage, thereby providing good substrate coating conditions for the next stage of reverse coating, achieving the effect of alleviating the phenomenon of substrate vibration during the electrode coating process, improving the stability of the distance between the lip and the substrate during the secondary coating of the reverse coating die head, and improving the coating quality.

[0058] In some embodiments, the base plate 1 is provided with a mounting surface 10, which is formed by bending 304 stainless steel sheet metal, and the mounting surface 10 after bending is ground; and / or the adsorption surface 2021 is made of polytetrafluoroethylene (PTFE). Specifically, in some embodiments, the base plate 1 is formed by bending 304 stainless steel sheet metal, and the mounting surface 10 is ground after bending to ensure flatness. The adsorption surface 2021 is made of polytetrafluoroethylene (PTFE), which has an extremely low coefficient of friction and can act as a lubricant, making the adsorption surface 2021 smooth.

[0059] See Figure 2 and Figure 3 , Figure 3 This is a cross-sectional view of the vacuum adsorption stage 2 in the flattening and anti-shaking device according to an embodiment of this application. In some embodiments, the vacuum adsorption stage 2 includes a vacuum stage 20 and a vacuum adsorption plate 202. The vacuum stage 20 is provided with a vacuum groove. The vacuum adsorption plate 202 covers the vacuum groove, and the vacuum adsorption plate 202 and the vacuum groove enclose to form a negative pressure adsorption cavity 201. The vacuum adsorption plate 202 is provided with a plurality of adsorption holes 2022, and the adsorption holes 2022 are connected to the negative pressure adsorption cavity 201.

[0060] Specifically, the negative pressure inside the negative pressure adsorption chamber 201 adsorbs the gas outside the vacuum adsorption plate 202 through the adsorption holes 2022, so that the vacuum adsorption stage 2 has a vacuum adsorption effect.

[0061] In some embodiments, the vacuum adsorption plate 202 is provided with a sealing ring 203, which seals the connection between the vacuum adsorption plate 202 and the vacuum stage 20. Specifically, in some embodiments, the sealing ring 203 may be an O-ring, which is partially embedded in the groove of the vacuum adsorption plate 202. The sealing ring 203 can seal the negative pressure adsorption chamber 201, improve the sealing effect, ensure the adsorption effect of the vacuum adsorption stage 2, and prevent vacuum leakage.

[0062] In some embodiments, the vacuum adsorption stage 2 is equipped with a throttling valve 204, and the negative pressure adsorption chamber 201 is connected to a vacuum pumping device through the throttling valve 204. The throttling valve 204 is a valve that controls the fluid flow rate by changing the throttling cross-section or throttling length. By setting the throttling valve 204, the vacuum flow rate in the negative pressure adsorption chamber 201 can be controlled and adjusted. The vacuum pumping device includes a vacuum pump source. The vacuum adsorption plate 202, the base plate 1, and the O-ring seal 203 form a negative pressure adsorption chamber 201, which is connected to the vacuum pump source through the throttling valve 204 and pipeline. During operation, a certain vacuum degree is formed in the negative pressure adsorption chamber. Adjusting the size of the throttling valve 204 can change the magnitude of the vacuum degree in the negative pressure adsorption chamber. Gas on the surface of the vacuum adsorption plate 202 in contact with the coated substrate 40 will directly reach the negative pressure adsorption chamber through the adsorption holes 2022. The adsorption surface 2021 of the PTFE vacuum adsorption plate 202 is very smooth and has a low coefficient of friction. During operation, the blank areas of the coated substrate 40 are adsorbed by the negative pressure adsorption chamber through the adsorption holes 2022, and slide along the adsorption surface 2021 of the vacuum adsorption plate 202 under the power traction at the rear end. In this way, the substrate vibration caused by the rear air flotation roller or air knife is eliminated by vacuum adsorption.

[0063] In some embodiments, three vacuum adsorption stages 2 are arranged along the width direction of the substrate. One stage is located in the middle of the base plate 1 and is used to adsorb the central blank area of ​​the substrate. The other two vacuum adsorption stages 2 are placed on both sides and are used to adsorb the edges of the substrate in the width direction. It can be understood that the specific number of vacuum adsorption stages 2 depends on the coating process and the amount of central blank area.

[0064] Specifically, in some embodiments, the vacuum adsorption stage 2 includes a movable mounting plate 205, which is fixedly connected to the outer wall of the vacuum stage 20. The movable mounting plate 205 is provided with a plurality of movable mounting holes 2051. A plurality of rows of threaded holes that cooperate with the movable mounting holes 2051 are opened on the mounting surface 10 of the base plate 1 along the width direction of the substrate. The position of the blank vacuum adsorption stage 2 can be adjusted according to the width of the coating substrate 40 and the position of the blank space in the middle to meet the coating requirements of different types of electrode sheets.

[0065] See Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the structure of the flattening pressure roller assembly 3 in the flattening anti-shaking device according to an embodiment of this application. Figure 5This is a schematic diagram of the flattening pressure roller assembly 3 from another perspective in a flattening anti-shaking device according to an embodiment of this application. In some embodiments, the flattening pressure roller assembly 3 further includes a lifting plate 301, an adjustable pressure roller mounting plate 302, and a lifting cylinder 308. The adjustable pressure roller mounting plate 302 is mounted on the lifting plate 301 and its position on the lifting plate 301 is adjustable along the width direction of the substrate. The pressure roller 306 is mounted on the adjustable pressure roller mounting plate 302. The lifting cylinder 308 is connected between the base plate 1 and the lifting plate 301, driving the lifting plate 301 and the adjustable pressure roller mounting plate 302 to move, so as to drive the pressure roller 306 away from or towards the adsorption surface 2021.

[0066] In some embodiments, a guide mechanism 307 is provided between the lifting plate 301 and the base plate 1. The guide mechanism 307 includes a guide rod 3071 disposed on the base plate 1, and a guide sleeve 3072 is slidably connected to the guide rod 3071. The guide sleeve 3072 is fixedly connected to the lifting plate 301. Flattening pressure roller assemblies 3 are suspended directly above the two outer vacuum adsorption stages 2, respectively. The guide mechanism 307 and the fixed end of the flattening pressure roller assembly 3, i.e., the guide rod 3071, are connected to the base plate 1.

[0067] See Figure 4 , Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the structure of the flattening pressure roller assembly 3 in an embodiment of the flattening anti-shaking device of this application, in which the angle of the pressure roller 306 is adjusted by the planar linkage mechanism 4. Figure 7 This is a schematic diagram from another perspective of the flattening pressure roller assembly 3 adjusting the angle of the pressure roller 306 via a planar linkage mechanism 4 in a flattening anti-shaking device according to an embodiment of this application. In some embodiments, the adjustable pressure roller mounting plate 302 is provided with a guide sleeve 303, and a guide shaft 305 is provided inside the guide sleeve 303. The guide shaft 305 is rotatably connected to the pressure roller 306, and a buffer spring 304 is provided between the guide shaft 305 and the adjustable pressure roller mounting plate 302. The flattening anti-shaking device also includes a planar linkage mechanism 4, which is installed between the guide shaft 305 and the adjustable pressure roller mounting plate 302 for adjusting the flattening angle.

[0068] Specifically, the pressure roller 306 is fitted with a bearing and connected to the lower groove of the guide shaft 305. After the buffer spring 304 is installed on the axle platform in the middle of the guide shaft 305, the upper part passes through the guide sleeve 303 in the adjustable pressure roller mounting plate 302 and is connected to the associated component of the planar linkage mechanism 4.

[0069] In some embodiments, the planar linkage mechanism 4 includes an adjusting plate 401, a fixing screw 404, and a sliding groove 406. The adjusting plate 401 is fixedly connected to the guide shaft 305. The fixing screw 404 is threadedly connected to the adjustable pressure wheel mounting plate 302. The sliding groove 406 is provided at the end of the adjusting plate 401. When the adjusting plate 401 rotates relative to the adjustable pressure wheel mounting plate 302, the fixing screw 404 slides relative to the adjusting plate 406. When the fixing screw 404 is locked, the adjusting plate 401 and the adjustable pressure wheel mounting plate 302 are fixed relative to each other.

[0070] In some embodiments, each flattening roller assembly 3 includes a plurality of rollers 306, an adjusting plate 401 is fixedly connected to a guide shaft 305 of one roller 306, and the planar linkage mechanism 4 further includes a follower plate 403 and a linkage push plate 402. The follower plate 403 is fixedly connected to the guide shafts 305 of the other rollers 306, and the linkage push plate 402 is hinged to the adjusting plate 401 and the follower plate 403 respectively.

[0071] Specifically, the adjustable pressure roller mounting plate 302 is mounted on the lifting plate 301, and its position on the lifting plate 301 along the width direction of the substrate is adjustable. The adjustable pressure roller mounting plate 302 is provided with an elongated hole 3021, and the groove of the adjustable pressure roller mounting plate 302 is connected to the lifting plate 301. The position of the elongated hole 3021 of the adjustable pressure roller mounting plate 302 is adjusted and locked to match different pressing positions of the pressure rollers 306. The extended shaft end of the lifting cylinder 308 is connected to the lifting plate 301, and the guide mechanism 307 plays a guiding role during the lifting process.

[0072] During operation, the lifting cylinder 308 of the flattening pressure roller assembly 3 presses down. When it touches the vacuum adsorption table 2 and continues to press down, the buffer spring 304 will be compressed. This can prevent the increase of resistance caused by overpressure on the coating substrate 40.

[0073] Specifically, directly above the vacuum adsorption stages 2 on both sides of the substrate width direction is the flattening pressure roller assembly 3. The guide shaft 305 of the pressure roller 306 passes through the guide sleeve 303 embedded in the adjustable pressure roller mounting plate 302 and is connected and fixed to the adjusting plate 401 and follower plate 403 of the planar linkage mechanism 4. The adjusting plate 401 and follower plate 403 are hinged to each other by the connecting rod push plate 402. Rotating the adjusting plate 401 clockwise (counterclockwise) to a certain angle will cause the pressure roller 306 and guide shaft 305 to rotate in the same direction. At the same time, under the linkage of the follower plate 403 and the connecting rod push plate 402, the other pressure rollers 306 and guide shaft 305 will rotate synchronously to adjust the flattening angle.

[0074] After this adjustment, the pressure rollers 306 on both sides will form an outward V-shape relative to the forward direction of the coating substrate 40. When the lifting cylinder 308 is pressed down, the pressure roller 306 assembly will fall onto the blank area of ​​the coating substrate 40 along the guide mechanism 307. Due to the outward V-shape arrangement, the pressure rollers 306 in contact with the blank area of ​​the coating substrate 40 cause the substrate to tend to stretch outwards during its movement, thus achieving a flattening effect.

[0075] See Figure 6 and Figure 7 After angle adjustment, the pressure roller 306 forms a certain angle with the conveying direction of the substrate, and is symmetrical from left to right. Specifically, in the planar linkage mechanism 4, the adjusting plate 401 is located in the middle, and the follower plates 403 are distributed at equal distances on both sides. The holes on one side of the adjusting plate 401 and the follower plates 403 are aligned with the holes on the connecting rod push plate 402 and then hinged. The middle hole of the adjusting plate 401 passes through the rotating shaft of the adjusting plate 401 and is connected and fixed to the guide shaft 305, and the arc-shaped elongated hole 3021 on the other side is engaged with the fixing screw 404. The holes on the other side of the follower plates 403 are also connected and fixed to their respective guide shafts 305. Rotating the adjusting plate 401 around the rotating shaft of the adjusting plate 401 will drive the guide shaft 305 to rotate, thus completing the angle adjustment of the pressure roller 306. After the appropriate angle adjustment, the fixing screw 404 is tightened. When the adjusting plate 401 is adjusted, it will simultaneously drive the follower plate 403 through the connecting rod push plate 402 to complete the adjustment of the corresponding guide shaft 305 and pressure roller 306.

[0076] According to the embodiments of this application, the flattening and anti-vibration device can be applied to the double-sided coating of electrode sheets. When the flattening and anti-vibration device is working, the blank area of ​​the coating substrate 40 is adsorbed by the negative pressure adsorption chamber 201 through the adsorption hole 2022, and slides along the adsorption surface 2021 of the vacuum adsorption table 2 under the power traction of the rear end. In this way, the substrate vibration caused by the rear air float roller or air knife is eliminated by vacuum adsorption. At the same time, the two flattening rollers extend outward. In the width direction of the coating substrate 40, the substrate can be extended outward under the action of the two flattening rollers to prevent wrinkling and shrinkage, thereby providing good substrate coating conditions for the next stage of reverse coating, achieving the effect of alleviating the phenomenon of substrate vibration during the electrode coating process, improving the stability of the distance between the lip and the substrate during the secondary coating of the reverse coating die head, and improving the coating quality.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A flattening and anti-shake device, characterized in that, include: Base plate (1); and A vacuum adsorption stage (2) is installed on the base plate (1). The vacuum adsorption stage (2) is provided with a negative pressure adsorption chamber (201) and an adsorption surface (2021). The adsorption surface (2021) is provided with a plurality of adsorption holes (2022). The adsorption holes (2022) are connected to the negative pressure adsorption chamber (201). At least two vacuum adsorption stages (2) are arranged along the width direction of the substrate. At least two flattening roller assemblies (3) are provided, and the two flattening roller assemblies (3) are suspended on the vacuum adsorption stage (2) at both ends of the width direction of the substrate. The flattening roller assembly (3) includes a rotating roller (306). A gap is provided between the roller (306) and the adsorption surface (2021). The rotation direction of the roller (306) forms a flattening angle with the conveying direction of the substrate. The flattening angle is less than or equal to ninety degrees.

2. The flattening and anti-shaking device according to claim 1, characterized in that, The vacuum adsorption stage (2) includes: Vacuum stage (20), wherein the vacuum stage (20) is provided with a vacuum groove; A vacuum adsorption plate (202) is provided, which covers the vacuum groove. The vacuum adsorption plate (202) and the vacuum groove enclose the negative pressure adsorption cavity (201). A plurality of adsorption holes (2022) are provided on the vacuum adsorption plate (202), and the adsorption holes (2022) are connected to the negative pressure adsorption cavity (201).

3. The flattening and anti-shaking device according to claim 2, characterized in that, The vacuum adsorption plate (202) is provided with a sealing ring (203), which is sealed between the vacuum adsorption plate (202) and the vacuum stage (20).

4. The flattening and anti-shaking device according to claim 2, characterized in that, The vacuum adsorption stage (2) is equipped with a throttle valve (204), and the negative pressure adsorption chamber (201) is connected to a vacuum pumping device through the throttle valve (204).

5. The flattening and anti-shaking device according to claim 1, characterized in that, The flattening roller assembly (3) also includes: Lifting platform (301); and An adjustable pressure roller mounting plate (302) is mounted on the lifting plate (301) and its position on the lifting plate (301) is adjustable along the width direction of the substrate. The pressure roller (306) is mounted on the adjustable pressure roller mounting plate (302). A lifting cylinder (308) is connected between the base plate (1) and the lifting plate (301) to drive the lifting plate (301) and the adjustable pressure roller mounting plate (302) to move, so as to drive the pressure roller (306) away from or closer to the adsorption surface (2021).

6. The flattening and anti-shaking device according to claim 5, characterized in that, A guide mechanism (307) is provided between the lifting plate (301) and the base plate (1). The guide mechanism (307) includes a guide rod (3071) disposed on the base plate (1). The guide rod (3071) is slidably connected to a guide sleeve (3072). The guide sleeve (3072) is fixedly connected to the lifting plate (301).

7. The flattening and anti-shaking device according to claim 5, characterized in that, The adjustable pressure roller mounting plate (302) is provided with a guide sleeve (303), and a guide shaft (305) is provided inside the guide sleeve (303). The guide shaft (305) is rotatably connected to the pressure roller (306), and a buffer spring (304) is provided between the guide shaft (305) and the adjustable pressure roller mounting plate (302). The flattening anti-shaking device also includes a planar linkage mechanism (4), which is installed between the guide shaft (305) and the adjustable pressure wheel mounting plate (302) to adjust the flattening angle.

8. The flattening and anti-shaking device according to claim 7, characterized in that, The planar linkage mechanism (4) includes: Adjusting plate (401), the adjusting plate (401) is fixedly connected to the guide shaft (305); A fixing screw (404) is threaded onto the adjustable pressure wheel mounting plate (302); A sliding groove (406) is provided at the end of the adjusting plate (401). When the adjusting plate (401) rotates relative to the adjustable pressure wheel mounting plate (302), the fixing screw (404) slides relative to the sliding groove (406). When the fixing screw (404) is tightened, the adjusting plate (401) and the adjustable pressure wheel mounting plate (302) are relatively fixed.

9. The flattening and anti-shaking device according to claim 8, characterized in that, Each of the flattening roller assembly (3) includes a plurality of rollers (306), the adjusting plate (401) is fixedly connected to the guide shaft (305) of one of the rollers (306), and the planar linkage mechanism (4) further includes: Follower plate (403), the follower plate (403) is fixedly connected to the guide shaft (305) of the other pressure rollers (306); The connecting rod push plate (402) is hinged to the adjusting plate (401) and the follower plate (403).

10. The flattening and anti-shaking device according to claim 1, characterized in that, The base plate (1) is provided with a mounting surface (10), the base plate (1) is made of 304 stainless steel sheet metal by bending, and the mounting surface (10) after bending is ground; and / or The adsorption surface (2021) is made of polytetrafluoroethylene.

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