Coating equipment and coating control method thereof

Abstract

The invention relates to coating equipment and a coating control method thereof. The coating equipment comprises an equipment main body, the equipment main body is provided with a preset base material running path, a first coating mechanism and a second coating mechanism, the first coating mechanism and the second coating mechanism are arranged along the base material running path, and a base material sequentially passes through the first coating mechanism and the second coating mechanism; the first coating mechanism is used for coating the base material within a first thickness range, and the second coating mechanism is used for coating the base material within a second thickness range; and the control device is electrically connected with the first coating mechanism and the second coating mechanism and is used for controlling the first coating mechanism and the second coating mechanism to operate independently or synchronously, so that the coating equipment is switched between different coating modes. According to the scheme provided by the invention, the first coating mechanism and the second coating mechanism can be cooperatively controlled, so that the equipment can flexibly switch coating modes of different thicknesses and materials, and the requirements of multi-specification coating processes can be met.

Description

Technical Field

[0001] The present application relates to the technical field of new energy equipment, and particularly to a coating device and a coating control method thereof. Background Art

[0002] The pole piece coating device is one of the core devices in the production process of lithium batteries, mainly used for uniformly coating the positive and negative electrode materials of the battery on a current collector (such as copper foil, aluminum foil) to form a pole piece.

[0003] In the related art, due to process principles and equipment structure limitations, a single device can only achieve a single coating method and cannot achieve multi-mode and multi-functional operation. Therefore, not only the utilization rate of the equipment is poor, but also it is difficult to meet the requirements of multi-specification coating processes.

[0004] In view of this, it is necessary to propose a coating device that can meet the requirements of multi-specification coating processes. Summary of the Invention

[0005] To solve or partially solve the problems existing in the related art, the present application provides a coating device and a coating control method thereof, which can coordinately control the first coating mechanism and the second coating mechanism, so that the device can flexibly switch between different coating modes with different thicknesses and materials, improve the utilization rate of the device, and meet the requirements of multi-specification coating processes at the same time.

[0006] The first aspect of the present application provides a coating device, including: A device main body, which is provided with a predetermined running path for the substrate; A first coating mechanism and a second coating mechanism, arranged along the running path of the substrate, and the substrate sequentially passes through the first coating mechanism and the second coating mechanism; the first coating mechanism is used for coating the substrate within a first thickness range, and the second coating mechanism is used for coating the substrate within a second thickness range; A control device, electrically connected to the first coating mechanism and the second coating mechanism, for controlling The first coating mechanism and the second coating mechanism to operate independently or synchronously, so that the coating device can switch between different coating modes; wherein, the different coating modes include: A first coating mode in which the first coating mechanism operates independently and the second coating mechanism stops operating; A second coating mode in which the first coating mechanism stops operating and the second coating mechanism operates independently; A third coating mode in which the first coating mechanism and the second coating mechanism operate synchronously.

[0007] In one embodiment, the first coating mechanism is disposed upstream of the substrate running path, and includes a first roller body and a pressure roller disposed opposite to each other; the substrate passes between the first roller body and the pressure roller, the pressure roller is used to guide and press the substrate, and the pressure roller is movably disposed in a direction close to and away from the first roller body; Wherein, in the first coating mode and the third coating mode, the roller surface of the first roller body is used to quantitatively store the first coating slurry, and when the pressing roller is close to the first roller body, it is used to coat the first coating slurry on the first roller surface to the moving substrate; In the second coating mode, the roller surface of the first roller body is a smooth surface, and the pressure roller is used to pull the substrate to move along the substrate running path when it is close to the first roller body.

[0008] In one embodiment, the second coating mechanism is disposed downstream of the substrate running path, and includes a second roller body and a back roller assembly disposed opposite to each other, the substrate passes between the second roller body and the back roller assembly, and the back roller assembly is movable in a direction close to and away from the second roller body; The roller surface of the second roller body is used for quantitatively storing the second coating slurry; when the back roller assembly is close to the second roller body, it is used for coating the second coating slurry on the roller surface onto the moving substrate.

[0009] In one embodiment, the first roller body and the pressure roller are arranged along the same vertical center line, and also include a clamping drive unit, the power output end of the clamping drive unit is transmission-connected to the pressure roller, and the clamping drive unit is used to drive the pressure roller to move in a direction away from or close to the first roller body.

[0010] In one embodiment, the back roller assembly includes two guide rollers spaced apart in the vertical direction, the substrate passes through the same side of the two guide rollers at the same time, and the second roller body corresponds to the middle position of the two guide rollers in the transverse direction; Wherein, it also includes a guiding mechanism, which includes a guiding driving member and a guide rail, the back roller assembly is installed on the guide rail, and the guiding driving member is used to drive the back roller assembly to move along the guide rail.

[0011] In one embodiment, the first coating mechanism further includes: The first trough assembly comprises: A material trough with an opening, the material trough is used to contain the first coating slurry, and the opening of the material trough faces the first roller body; A lifting drive mechanism, the lifting drive mechanism is drivingly connected to the material trough and is used to drive the material trough away from or close to the first roller body; The doctor blade assembly includes a doctor blade that can approach or move away from the first roller surface. When the doctor blade is pressed against the first roller surface, it is used to remove the overflowing first coating slurry on the first roller surface.

[0012] In one embodiment, it further includes at least one of the following: A de-ironing mechanism is provided at the head end of the substrate running path for removing iron impurities on the surface of the substrate; A tension adjustment mechanism is provided upstream of the first coating mechanism for adjusting the tension of the substrate between the first coating mechanism and the second coating mechanism; A color registration mechanism is provided at the tail end of the substrate running path for controlling the positions of different slurry color groups on the substrate; The over-roller mechanism includes a plurality of fixed rollers and adjustment rollers distributed at different positions of the substrate running path for guiding the substrate to move along the running path.

[0013] In one embodiment, the equipment main body includes a frame. The first coating mechanism and the second coating mechanism are installed at set positions on the frame. The frame is provided with a substrate inlet area and a substrate outlet area. The head end of the substrate running path is located in the substrate inlet area, and the tail end is located in the substrate outlet area.

[0014] The second aspect of the present application provides a coating control method for a coating equipment, including: Obtaining a coating mode instruction according to the target coating thickness parameter of the substrate. The instruction includes a first coating mode, a second coating mode, or a third coating mode; In response to the coating mode instruction, controlling the operating states of the first coating mechanism and the second coating mechanism; wherein, in the first coating mode, only the first coating mechanism is enabled, in the second coating mode, only the second coating mechanism is enabled, and in the third coating mode, the first coating mechanism and the second coating mechanism are enabled synchronously.

[0015] In one embodiment, the controlling the operating states of the first coating mechanism and the second coating mechanism in response to the coating mode instruction includes: In response to the first coating mode instruction, controlling the second coating mechanism to stop operating, driving the first material tank of the first coating mechanism to move to the working position of the first roller body; starting the first roller body to rotate clockwise, driving the doctor blade to contact the surface of the first roller body to remove the overflowing slurry, and driving the pressure roller to press down so that the substrate is closely attached to the surface of the first roller body; or, In response to the second coating mode instruction, control the first coating mechanism to stop running, drive the pressure roller of the first coating mechanism to press down on the smooth surface of the first roller body to form a traction gap for transmitting the substrate; drive the second material tank of the second coating mechanism to move to the working position of the second roller body, and start the second roller body to rotate counterclockwise, and drive the back roller assembly to move so that the substrate is closely attached to the surface of the second roller body; or, In response to the third coating mode instruction, control the first coating mechanism and the second coating mechanism to run synchronously, drive the first material tank of the first coating mechanism to move to the working position of the first roller body, and start the first roller body to rotate clockwise, drive the scraper to contact the surface of the first roller body to remove the overflow slurry, and drive the pressure roller to press down so that the substrate is closely attached to the surface of the first roller body; Drive the second material tank of the second coating mechanism to move to the working position of the second roller body, and start the second roller body to rotate counterclockwise, and drive the back roller assembly to move so that the substrate is closely attached to the surface of the second roller body, wherein the substrate is continuously transmitted through the first coating mechanism and the second coating mechanism in sequence.

[0016] The technical solution provided by this application may include the following beneficial effects: Through the parallel integration and path series design of the double coating mechanisms, this application realizes the compatibility of a single device with two processes of forward coating and reverse coating; the coordinated control of the control device over the first coating mechanism and the second coating mechanism enables the device to flexibly switch different coating modes for different thicknesses and materials, which can improve the utilization rate of the device and meet the requirements of multi-specification coating processes at the same time.

[0017] In the solution of this application, through the flexible switching control of the coating mode, a single device is compatible with the three process requirements of thick coating, thin coating, and composite coating, avoiding the limitations of the single function of traditional devices. Moreover, the first coating mechanism can be converted into a traction device in the second coating mode to ensure the transmission stability of the substrate in the second coating mode. When the second coating mechanism and the second coating mechanism are in the third coating mode, the pressure roller and the back roller assembly are synchronously controlled to cooperate and press, realizing differential coating in a single pass of the tape, shortening the equipment changeover time, further improving the equipment utilization rate, and meeting the requirements of multi-specification coating processes.

[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By describing the exemplary embodiments of this application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of this application will become more obvious, wherein, in the exemplary embodiments of this application, the same reference numerals generally represent the same components.

[0020] Figure 1It is a schematic structural diagram of a coating device shown in an embodiment of the present application; Figure 2 It is a schematic diagram of the coating device in the first coating mode shown in an embodiment of the present application; Figure 3 It is a schematic diagram of the coating device in the second coating mode shown in an embodiment of the present application; Figure 4 It is a schematic diagram of the coating device in the third coating mode shown in an embodiment of the present application; Figure 5 It is a schematic flow diagram of a coating control method shown in an embodiment of the present application; Figure 6 It is a schematic flow diagram of a coating control method shown in another embodiment of the present application.

[0021] Reference numerals: 100, device main body; 101, base material; 110, first coating mechanism; 111, first roller body; 1111, first material tank assembly; 112, pressure roller; 1121, pressing drive unit; 120, second coating mechanism; 121, back roller assembly; 1211, back roller; 122, second roller body; 1221, second material tank assembly; 130, doctor blade assembly; 131, doctor blade; 132, drive unit; 140, tension adjustment mechanism; 141, swing roller; 142, tension roller; 143, adjustment roller; 144, first fixed roller; 145, second fixed roller; 150, iron removal mechanism; 160, color registration mechanism. Detailed implementation manners

[0022] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0023] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0024] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0025] In the related art, due to process principle and equipment structure limitations, a single polar coating device can only achieve a single coating method and cannot operate in multiple modes and with multiple functions. Therefore, not only the utilization rate of the equipment is poor, but it is also difficult to meet the requirements of multi-specification coating processes. In view of the above problems, the embodiments of this application provide a coating device and its coating control method, which can coordinately control the first coating mechanism and the second coating mechanism, enabling the device to flexibly switch between different coating modes with different thicknesses and materials, improving the utilization rate of the device, and meeting the requirements of multi-specification coating processes at the same time.

[0026] The technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0027] Figure 1 It is a schematic structural diagram of a coating device shown in an embodiment of this application.

[0028] See Figure 1 , this application provides a coating device, including a device main body 100, a first coating mechanism 110, a second coating mechanism 120 and a control device. The device main body 100 is provided with a predetermined running path for the substrate 101; the first coating mechanism 110 and the second coating mechanism 120 are arranged along the running path of the substrate 101, and the substrate 101 passes through the first coating mechanism 110 and the second coating mechanism 120 in sequence; the first coating mechanism 110 is used to coat the substrate 101 within a first thickness range, and the second coating mechanism 120 is used to coat the substrate 101 within a second thickness range; the control device is electrically connected to the first coating mechanism 110 and the second coating mechanism 120, and is used to control the first coating mechanism 110 and the second coating mechanism 120 to operate independently or synchronously, so as to enable the coating device to switch between different coating modes.

[0029] In this application, the base material 101 can be made of materials such as copper, aluminum foil, and diaphragm. The device main body 100 includes a frame, and the first coating mechanism 110 and the second coating mechanism 120 are installed on the frame. The base material 101 passes through the first coating mechanism 110 and the second coating mechanism 120 in sequence. The first coating mechanism 110 is located upstream of the path, and the second coating mechanism 120 is located downstream. The first coating mechanism 110 is used to coat the base material 101 in the clockwise direction. For example, the coating thickness range can be 2 - 8um. The second coating mechanism 120 is used to coat the base material 101 in the counterclockwise direction. For example, the coating thickness range can be 0.5 - 3um, but is not limited to this.

[0030] The control device can be a PLC controller or several switch components. The controller is electrically connected to the driving parts (motors / cylinders) of each mechanism, controls the first coating mechanism 110 to perform coating within the first thickness range, and the second coating mechanism 120 to perform coating within the second thickness range, and realizes the switching of three modes through starting and stopping coordination: in the first coating mode, only the first coating mechanism operates; in the second coating mode, only the second coating mechanism operates; in the third coating mode, the two mechanisms operate synchronously.

[0031] Through the parallel integration and path series design of the double coating mechanisms (the first coating mechanism and the second coating mechanism), this application realizes the compatibility of a single device with two processes of forward coating and reverse coating; the coordinated control of the control device over the first coating mechanism 110 and the second coating mechanism 120 enables the device to flexibly switch coating modes with different thicknesses and materials, improves the utilization rate of the device, and can meet the requirements of multi - specification coating processes.

[0032] In some embodiments, the first coating mechanism 110 is arranged upstream of the running path of the base material 101, and includes a first roller body 111 and a pressure roller 112 arranged longitudinally. The base material 101 passes between the first roller body 111 and the pressure roller 112, and the pressure roller is used to guide and press the base material. The pressure roller 112 is located above the first roller body 111 and is movably arranged in the direction of approaching and departing from the first roller body 111; wherein, in the first coating mode and the third coating mode, the roller surface of the first roller body 111 is used to quantitatively store the first coating slurry, and when the pressure roller 112 approaches the first roller body 111, it is used to coat the first coating slurry on the surface of the first roller body 111 onto the advancing base material 101; in the second coating mode, the roller surface of the first roller body 111 is a smooth surface, and when the pressure roller 112 approaches the first roller body 111, it is used to traction the base material 101 to move along the running path of the base material 101.

[0033] In the present application, the first roller body 111 is an independent and detachable rubber roller structure, which can be installed on the bearing seat of the first coating mechanism through a quick-release flange structure. The roller surface is provided with mesh cell lines with variable depth, and the coating thickness of the substrate 101 is determined by the depth of the mesh cell lines, that is, deep lines correspond to thick coatings, and shallow lines correspond to thin coatings. The hardness of the rubber roller is achieved through the differentiation of rubber formulas, and the coating quality is coordinated by the hardness of the rubber roller and the downward pressure gap of the pressure roller 112. For example, high-viscosity slurry is adapted to a hard rubber roller to avoid deformation, and low-viscosity slurry is adapted to a soft rubber roller to enhance the fit. The cylinder pressure of the pressure roller 112 controls the downward pressure gap to a set value to finely adjust the uniformity of slurry transfer. The modular design of the first roller body 111 makes the combination of engraved line depth and hardness flexible and adjustable. A single device can cover a wide range of coating thickness requirements (2-8μm), greatly reducing changeover time. The precise matching of the rubber roller hardness and the gap between the pressure roller 112 ensures that high-viscosity slurry can be coated without splashing, and that low-viscosity slurry has no smudge on the edge, thus improving coating uniformity. The detachable structure simplifies the maintenance process and significantly reduces downtime losses.

[0034] In some embodiments, the first roller body 111 and the pressure roller 112 are arranged along the same vertical center line, and the first coating mechanism also includes a clamping drive unit 1121, which can be a cylinder. The power output end of the clamping drive unit 1121 is transmission-connected to the pressure roller 112, and the clamping drive unit 1121 is used to drive the pressure roller 112 to move away from or close to the first roller body 111.

[0035] In this embodiment, the first roller body 111 and the pressure roller 112 are vertically aligned along the longitudinal center line, the substrate 101 is U-shaped and wrapped around the outer edge of the pressure roller 112, and the pressure roller 112 can move up and down by being driven by a cylinder. In the first / third coating mode, a mesh hole is set on the surface of the first roller body 111 to store slurry. When the pressure roller 112 is pressed down, the substrate 101 is pressed against the first roller body 111, and the slurry in the mesh hole is transferred to the surface of the substrate 101 to form a forward coating; in the second coating mode, the first roller body 111 is replaced by a smooth steel roller. When the pressure roller 112 is pressed down, a clamping traction force is formed between the pressure roller 112 and the smooth surface of the steel roller, driving the substrate 101 to be transmitted along the path to the downstream second coating mechanism.

[0036] The solution of the present application realizes precise transfer of slurry in thick coating mode (first / third coating mode) and seamlessly switches to traction mechanism in thin coating mode (second coating mode) through the vertical alignment design of the pressure roller 112 and the first roller body 111 and the dual-function switching structure of the pressure roller 112, thereby avoiding the need to add an independent traction device. The first coating mechanism is converted into a traction mechanism in the second coating mode for functional reuse. The lifting and lowering action of the pressure roller 112 and the inverted "U"-shaped winding method of the substrate 101 path work together to ensure uniformity of coating pressure and no slippage of the substrate 101 during traction, thereby significantly improving the functional integration and process adaptability of the equipment.

[0037] In some embodiments, the first coating mechanism 110 further includes a first trough assembly 1111 and a squeegee assembly 130. The first trough assembly 1111 is used to accommodate the first coating slurry. The first trough assembly 1111 includes a first trough with an opening, and the opening of the first trough faces the first roller 111. The trough assembly further includes a lifting drive mechanism for driving the first trough away from or close to the first roller 111. The squeegee assembly 130 includes a squeegee 131 that can approach or move away from the surface of the first roller 111. When the squeegee 131 is pressed against the surface of the first roller 111, it is used to remove the first coating slurry overflowing on the surface of the first roller 111.

[0038] Specifically, the first trough assembly 1111 includes a first trough with an open top, that is, the first trough is an open trough. The opening of the first trough is accurately aligned with the bottom circumferential surface of the first roller 111 and is vertically lifted and lowered by a lifting drive mechanism (worm and gear device or lead screw device) at the bottom. When the first trough rises, the opening fits the lower edge of the first roller 111 to form a grouting cavity, and when it descends, it completely disengages from the first roller 111. The squeegee assembly 130 includes an adjustable-angle squeegee 131 and a drive unit 132. The squeegee 131 is pushed by the drive unit 132 to press against or move away from the surface of the first roller 111 along a diagonal trajectory of about 30°. When the first trough rises for grouting, the lower half of the first roller 111 is immersed in the slurry and rotates to store the slurry through the mesh holes. After the squeegee 131 is pressed down, its blade edge forms a linear contact zone with the surface of the first roller 111 to remove the excess slurry outside the mesh holes and only retain the quantitative slurry inside the mesh holes.

[0039] Through the precise alignment design of the vertical lifting of the first trough and the first roller 111 in this application, combined with the synergistic effect of the diagonal pressing of the squeegee 131, precise control of efficient slurry injection and quantitative storage of slurry in the mesh holes is achieved; the adjustable-angle design of the squeegee 131 adapts to different slurry viscosity characteristics, effectively avoiding slurry splashing and dry material accumulation; the open trough structure of the first coating mechanism facilitates real-time observation of the slurry state, and the cleaning function of the squeegee 131 significantly reduces the frequency of shutdown maintenance, overall improving the stability of coating quality and production continuity.

[0040] In some embodiments, the second coating mechanism 120 is disposed downstream of the running path of the substrate 101, and includes a second roller 122 arranged horizontally and a back roller assembly 121. The substrate 101 passes between the second roller 122 and the back roller assembly 121, and the substrate 101 is wound around the back roller assembly 121. The back roller assembly 121 is located on the side of the second roller 122 and is movably arranged in the direction of approaching and moving away from the second roller 122. The roller surface of the second roller 122 is used to quantitatively store the second coating slurry. When the back roller assembly 121 approaches the first roller 111, it is used to coat the second coating slurry on the surface of the second roller 122 onto the advancing substrate 101.

[0041] The back roller assembly 121 includes two guide rollers spaced apart in the vertical direction, the substrate 101 passes through the same side of the two guide rollers at the same time, and the second roller body 122 corresponds to the middle position of the two guide rollers in the horizontal direction; wherein, the back roller assembly also includes a guide mechanism, the guide mechanism includes a guide drive and a linear guide rail, the back roller assembly 121 is installed on the linear guide rail, and the guide drive is used to drive the back roller assembly 121 to move along the linear guide rail.

[0042] In some embodiments, the second roller body 122 is horizontally arranged, and its axis is directly opposite to the middle gap between the two guide rollers, forming a triangular space layout, and the back roller assembly 121 is installed on the linear guide rail as a whole, and the guide drive member drives it to move laterally along the linear guide rail. In the working position, the back roller assembly 121 moves left, so that the second roller body 122 is embedded in the center of the gap between the two guide rollers, and the substrate 101 is pressed against the roller surface of the second roller body 122; in the avoidance position, the back roller assembly 121 moves right, and the second roller body 122 is completely separated from the back roller assembly 121 and the substrate.

[0043] In this embodiment, the coating thickness of the second roller 122 is associated with the depth of the micro-concave roller score line, the coating tape speed and the rotation speed of the coating roller. The surface of the second roller 122 is provided with a precision cutting mesh line, and the depth of the score line directly limits the basic value of the slurry storage amount. The coating thickness collaborative control system dynamically matches the three elements by adjusting the fixed mesh line depth to determine the thickness reference. The transmission speed of the substrate 101 is negatively correlated with the slurry transfer amount, and the counterclockwise rotation speed of the second roller 122 is positively correlated with the slurry release amount, for example, high-speed rotation thickens the coating.

[0044] The second coating mechanism 120 also includes a second trough assembly 1221, which includes a second trough provided on the side of the second roller body 122 away from the back roller assembly 121, and the second trough can be a closed trough. In actual operation, after the closed trough is closed and grouting is performed, the thickness is fine-tuned by synchronously adjusting the ratio of the substrate's tape speed and the roller speed of the second roller body 122. The basic thickness range is set by the depth of the engraved lines of the second roller body 122, combined with the dynamic balance adjustment of the tape speed and the roller speed, breaking through the traditional single-factor thickness control limitation, and realizing the precise control of ultra-thin coatings; the speed coordination mechanism enables the equipment to still ensure thickness stability under high-speed operation, greatly improving the production efficiency and yield rate of the thin coating process.

[0045] In the solution of this embodiment, the double-guide roller design of the back roller assembly 121 and the lateral movement operation not only ensure that the base material 101 contacts the second roller body 122 with a constant wrap angle to achieve uniform thin coating, but also can completely avoid in the non-working mode to prevent slurry contamination; the second material tank is a closed material tank, and the synchronous linkage mechanism between the closed material tank and the back roller 1211 ensures that the whole process is sealed during the slurry injection, coating and resetting processes, effectively preventing splashing and volatilization; the reverse coating characteristics of the second roller body 122 combined with the precise positioning control of the back roller 1211 significantly improve the stability and edge accuracy of the ultra-thin coating (0.5-2μm).

[0046] Since the first material tank is an open material tank and the second material tank is a closed material tank, the partition design of the open material tank and the closed material tank takes into account the visibility and stability of the slurry. The synchronous action mechanism of the closed material tank and the back roller assembly 121 not only ensures the sealing stability of the slurry, but also simplifies the equipment operation process, significantly improving the efficiency of the thin coating process and the convenience of maintenance.

[0047] In some embodiments, the coating equipment of the present application further includes a de-ironing mechanism 150, which is arranged at the head end of the running path of the base material 101 and is used to remove iron impurities on the surface of the base material 101. The de-ironing mechanism 150 is arranged at the entrance of the head end of the running path of the base material 101, and the permanent magnet array is used to adsorb iron filings on both sides of the passing base material 101, removing impurities on the surface of the base material 101 from the source and avoiding iron filings from scratching the coating surface.

[0048] In some embodiments, the coating equipment of the present application further includes a tension adjustment mechanism 140, which is arranged upstream of the first coating mechanism 110 and is used to adjust the tension of the base material 101 between the first coating mechanism 110 and the second coating mechanism 120. The tension adjustment mechanism 140 is arranged on the running path of the base material 101 upstream of the first coating mechanism 110, and a triangular layout is formed by a swing roller 141 and two tension rollers 142. The swing roller 141 is installed on the frame through a central hinge shaft and can swing up and down around the axis; the two tension rollers 142 are arranged on the left and right sides of the swing roller 141 respectively, and the height is independently adjusted through a screw mechanism. When the tension of the base material 101 changes, the swing roller 141 automatically swings under the action of the tension, balancing the tension of the base material 101 on both sides in real time, and the fine adjustment of the height of the tension roller 142 is used to correct local wrinkles, and cooperate with the swing roller 141 to maintain the flatness of the base material 101.

[0049] The present application realizes the dynamic balance of the tension of the base material 101 and the correction of local deformation through the automatic swing response of the swing roller 141 and the active height adjustment of the tension roller 142. The triangular winding path design increases the contact wrap angle between the base material 101 and the swing roller 141, enhancing the sensitivity of tension adjustment. The separate layout of the two tension rollers 142 enables differential fine adjustment of the tension on both sides of the base material 101, effectively preventing the generation of unilateral wrinkles, ensuring that the base material 101 is always in the best tension state during transmission between the gravure and the second coating mechanism 120, and significantly improving the coating uniformity and edge alignment accuracy.

[0050] In some embodiments, it further includes a color register mechanism 160, which is arranged at the end of the running path of the base material 101 and is used to control the positions of different slurry color groups on the base material 101. The color register mechanism 160 includes a detection head and an alignment roller that can slide horizontally, compares the positions of the coating patterns in real time and feeds back for adjustment, and realizes precise alignment of multiple color groups through closed-loop control to eliminate overprint deviation.

[0051] In some embodiments, it further includes a guide roller assembly, which is composed of an adjusting roller 143, multiple fixed guide rollers and adjusting rollers, and is distributed along the running path of the base material 101. The first fixed roller 144 in the entrance area is used to guide the base material 101 into the iron removal mechanism 150 along a predetermined angle; the adjusting roller 143 in the coating area is arranged on the upstream side of the first coating mechanism 110, and its adjustable inclination angle is designed to adapt to the path turning of the base material 101 towards the first coating mechanism 110. The second fixed roller 145 in the exit area is used to lead out the base material 101 after color register treatment from the equipment main body 100 along a predetermined angle.

[0052] See Figure 2 , in the solution of the present application, in the first coating mode, the first coating mechanism coats independently. At this time, the second roller body 122 remains closed. When the base material 101 passes through the back roller assembly 121 of the micro second coating mechanism, the back roller assembly 121 docks at the avoidance position; the operator assembles the first roller body 111 required by the process to the first coating mechanism in advance, and then starts the first material tank mechanism. The motor drives the first material tank to rise from the bottom to the working position and triggers automatic grouting. Synchronously, the driving first roller body 111 is started to rotate clockwise at a low speed. After adjusting the position of the blade assembly 130, the cylinder is started to push the blade 131 down onto the surface of the first roller body 111 to remove the overflow slurry outside the mesh holes and only retain the quantitative slurry; finally, the pressing roller 112 is started to descend to the preparatory position, and the pressing roller 112 vertically presses down with the base material 101 to make the base material 101 closely adhere to the surface of the first roller body 111.

[0053] See Figure 3 , in the second coating mode, the second coating mechanism coats independently, and the second coating mechanism is enabled for coating operation. At this time, the blade assembly 130 and the first material tank mechanism in the first coating mechanism stop running. After the base material 101 passes through the pressing roller 112 of the first coating mechanism 110, it enters the first coating mechanism 110. At this time, the operator disassembles the first roller body 111 at the first coating mechanism and replaces it with a smooth steel roller to form a traction mechanism with the pressing roller 112. The electromagnetic valve is synchronously started to drive the second material tank to move horizontally to the left to fit the second roller body 122 and automatically grout, and at the same time, the steel roller is driven to rotate clockwise and the second roller body 122 is driven to rotate counterclockwise; then the motor of the pressing roller 112 is started to lower the pressing roller 112 to the working position, and the pressing roller 112 carries the base material 101 to press tightly against the steel roller to transmit the base material to the second coating mechanism. Finally, the back roller assembly is driven to move to the right to press the base material 101 against the surface of the second roller body 122.

[0054] See Figure 4 In the third coating mode, the first coating mechanism and the second coating mechanism are coated synchronously. A first roller 111 is assembled at the first coating mechanism and the first trough mechanism is driven to rise for grouting. After starting the clockwise rotation of the first roller 111, the cylinder of the scraper assembly 130 is controlled to push the scraper 131 down to remove the overflowing slurry outside the mesh holes. At the same time, the second trough is driven to move horizontally to the left for grouting, and the second roller 122 is started to rotate counterclockwise. Subsequently, the pressing roller 112 is driven to move down, and the pressing roller 112 carries the substrate 101 to press against the surface of the first roller 111. The backing roller 1211 is synchronously driven to move to the right, so that the substrate 101 is pressed against the surface of the second roller 122, realizing simultaneous coating by the two mechanisms.

[0055] The coating equipment of the present application is introduced above. Correspondingly, the present application also provides a coating control method. See Figure 5 The method includes the following steps: S110. Obtain a coating mode instruction according to the target coating thickness parameter of the substrate. The instruction includes the first coating mode, the second coating mode or the third coating mode.

[0056] In this step, after receiving the target coating thickness parameter of the substrate 10, the controller generates a coating mode instruction: if the thickness parameter is the first thickness, the first coating mode is triggered; if the thickness parameter is the second thickness, the second coating mode is triggered; if the thickness parameter is for layered coating of different materials, the third coating mode is triggered.

[0057] S120. In response to the coating mode instruction, control the operating states of the first coating mechanism 110 and the second coating mechanism 120. Among them, in the first coating mode, only the first coating mechanism 110 is enabled; in the second coating mode, only the second coating mechanism 120 is enabled; in the third coating mode, both the first coating mechanism 110 and the second coating mechanism 120 are enabled synchronously.

[0058] In the solution of the present application, the controller controls the coordinated start and stop of the dual-mechanism components, which not only ensures the efficient operation of a single mode, but also breaks through to realize the process integration of synchronous coating by the two mechanisms. The mode switching process is automatically executed, eliminating manual changeover errors and significantly improving the response speed to multi-specification orders and the consistency of coating quality.

[0059] In some embodiments, controlling the operating states of the first coating mechanism 110 and the second coating mechanism 120 includes: controlling the moving positions of the pressing roller of the first coating mechanism 110 and the backing roller assembly 121 of the second coating mechanism 120. Among them, in the first coating mode and / or the third coating mode, the pressing roller 112 is driven to move down to the coating surface of the first roller 111 to form a coating gap; in the second coating mode, the pressing roller 112 is driven to move down to the smooth surface of the first roller 111 to form a traction gap.

[0060] In this step, in the first / third coating mode, the controller drives the pressure roller of the first coating mechanism 110 to move vertically downward, so that the pressure roller 112 and the gravure coating surface of the first roller body 111 form a precise coating gap, and the substrate 101 is pressed against the first roller body 111 under the pressure of the pressure roller 112 to complete the slurry transfer; in the second coating mode, the pressure roller is driven to move vertically downward, so that the pressure roller 112 and the smooth surface of the smooth steel roller with the position replaced with the first roller body 111 form a traction gap. At this time, the pressure roller 112 and the steel roller clamp the substrate 101 to provide transmission power. The back roller assembly 121 is synchronously controlled in the second / third coating mode: it moves to the right and presses against the second roller body 122 in the second coating mode, and maintains the pressing force and runs in coordination in the third coating mode.

[0061] Through the differential gap control of the pressure roller on the coating surface / smooth surface of the first roller body 111, the single mechanism realizes the dual function conversion of coating pressure application and substrate 101 traction, eliminating the need for an independent traction device; the moving position coordination strategy of the pressure roller 112 and the back roller 1211 ensures the constancy of the coating pressure in the first / third modes and the stability of the traction tension in the second coating mode, improving the process stability and switching reliability of the three coating modes from the root of mechanical actions.

[0062] See Figure 6 , in some embodiments, the coating control method of this embodiment includes: S110. Obtain a coating mode instruction according to the target coating thickness parameter of the substrate, and the instruction includes the first coating mode, the second coating mode or the third coating mode.

[0063] S121. In response to the first coating mode instruction, control the second coating mechanism to stop running, drive the first material tank of the first coating mechanism to move to the working position of the first roller body; start the first roller body to rotate clockwise, drive the squeegee to contact the surface of the first roller body to remove the overflow slurry, and drive the pressure roller to press down so that the substrate is closely attached to the surface of the first roller body.

[0064] In this step, the first roller body is an intaglio roller. When the substrate continuously runs and is closely attached to the surface of the first roller body, the first coating slurry on the surface of the first roller body is transferred to the surface of the substrate, realizing coating within the first thickness range.

[0065] S122. In response to the second coating mode instruction, control the first coating mechanism to stop running, drive the pressure roller of the first coating mechanism to press down to the smooth surface of the first roller body to form a traction gap to transfer the substrate; drive the second material tank of the second coating mechanism to move to the working position of the second roller body, and start the second roller body to rotate counterclockwise, and drive the back roller assembly to move so that the substrate is closely attached to the surface of the second roller body.

[0066] In this step, the first roller is replaced with a smooth steel rod, and the second roller is a gravure roller. Cooperating with the pressure roller, the substrate is conveyed towards the second coating mechanism. When the substrate is in close contact with the surface of the second roller, the second coating slurry on the surface of the second roller is transferred to the surface of the substrate, realizing coating within the second thickness range.

[0067] S123. In response to the third coating mode instruction, control the first coating mechanism and the second coating mechanism to operate synchronously. Drive the first material tank of the first coating mechanism to move to the working position of the first roller, and start the first roller to rotate clockwise. Drive the squeegee to contact the surface of the first roller to remove the overflow slurry, and drive the pressure roller to press down so that the substrate is in close contact with the surface of the first roller. Drive the second material tank of the second coating mechanism to move to the working position of the second roller, and start the second roller to rotate counterclockwise. Drive the back roller assembly to move so that the substrate is in close contact with the surface of the second roller. Herein, the substrate is continuously conveyed through the first coating mechanism and the second coating mechanism in sequence.

[0068] In this step, the first roller is a gravure roller, and the second roller is a gravure roller. The coating of the composite coating is realized through the synchronous operation of the first coating mechanism and the second coating mechanism.

[0069] In some embodiments, the method further includes: performing an operation of applying a first material as a primer to the substrate 101 through the first coating mechanism 110 to form a first coating with a single-sided first thickness (for example, 2 - 8 μm); performing an operation of applying a second material to the substrate 101 through the second coating mechanism 120 to form a second coating with a single-sided second thickness (for example, 0.5 - 3 μm); wherein: when a composite coating with a single-sided total thickness approximately combined with the first thickness and the second thickness (for example, 7 μm) is required, after controlling the first coating mechanism 110 to complete the application of the first material as a primer, then apply the second material on the surface of the first coating through the second coating mechanism 120 so that the cumulative thickness of the composite coating reaches approximately 7 μm. In this embodiment, the first material and the second material can be selected according to the actual process. For example, the first material can be a carbon coating, and the second material can be AT11. The present application does not make any limitation thereto. By applying the first material through the first coating mechanism 110 to form a bottom layer coating with the first thickness, and combining with the second coating mechanism 120 to stack the second material to form a surface layer coating with the second thickness, a composite coating structure with complementary mechanical properties can be achieved.

[0070] In the solution of this application, through the flexible switching control of the coating mode, a single device is compatible with the three process requirements of thick coating, thin coating, and composite coating, avoiding the limitation of the single function of traditional equipment. Moreover, the first coating mechanism can be converted into a traction device in the second coating mode to ensure the transmission stability of the substrate in the second coating mode. When the second coating mechanism and the second coating mechanism are in the third coating mode, the pressure roller and the back roller assembly are synchronously controlled to cooperate and press, realizing differential coating in a single pass of the tape, shortening the equipment changeover time, further improving the equipment utilization rate, and meeting the requirements of multi-specification coating processes.

[0071] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technologies in the market, or to enable other ordinary technical personnel in the technical field to understand the embodiments disclosed herein.

Claims

1. A coating device, characterized in that, include: An equipment body, wherein the equipment body is provided with a predetermined substrate running path; The first coating mechanism and the second coating mechanism are arranged along the running path of the substrate, and the substrate passes through the first coating mechanism and the second coating mechanism in sequence; the first coating mechanism is used to coat the substrate in a first thickness range, and the second coating mechanism is used to coat the substrate in a second thickness range; A control device is electrically connected to the first coating mechanism and the second coating mechanism, and is used to control The first coating mechanism and the second coating mechanism operate independently or synchronously, so that the coating device switches between different coating modes; wherein the different coating modes include: A first coating mode in which the first coating mechanism operates independently and the second coating mechanism stops operating; A second coating mode in which the first coating mechanism stops operating and the second coating mechanism operates independently; A third coating mode when the first coating mechanism and the second coating mechanism operate synchronously.

2. The coating device according to claim 1, characterized in that: The first coating mechanism is arranged upstream of the substrate running path, and comprises a first roller body and a pressure roller arranged opposite to each other; the substrate passes between the first roller body and the pressure roller, the pressure roller is used to guide and press the substrate, and the pressure roller is movable in the direction of approaching and moving away from the first roller body; Wherein, in the first coating mode and the third coating mode, the roller surface of the first roller body is used to quantitatively store the first coating slurry, and when the pressing roller is close to the first roller body, it is used to coat the first coating slurry on the first roller surface to the moving substrate; In the second coating mode, the roller surface of the first roller body is a smooth surface, and the pressure roller is used to pull the substrate to move along the substrate running path when it is close to the first roller body.

3. The coating device according to claim 2, characterized in that: The second coating mechanism is arranged downstream of the substrate running path, and comprises a second roller body and a back roller assembly arranged opposite to each other, the substrate passes between the second roller body and the back roller assembly, and the back roller assembly is movable in the direction of approaching and moving away from the second roller body; The roller surface of the second roller body is used for quantitatively storing the second coating slurry; when the back roller assembly is close to the second roller body, it is used for coating the second coating slurry on the roller surface onto the moving substrate.

4. The coating device according to claim 2, characterized in that: The first roller body and the pressure roller are arranged along the same vertical center line, and also include a clamping drive unit, the power output end of the clamping drive unit is transmission-connected to the pressure roller, and the clamping drive unit is used to drive the pressure roller to move away from or close to the first roller body.

5. The coating device according to claim 3, characterized in that: The back roller assembly includes two guide rollers spaced apart in the vertical direction, the substrate passes through the same side of the two guide rollers at the same time, and the second roller body corresponds to the middle position of the two guide rollers in the transverse direction; Wherein, it also includes a guiding mechanism, which includes a guiding driving member and a guide rail, the back roller assembly is installed on the guide rail, and the guiding driving member is used to drive the back roller assembly to move along the guide rail.

6. The coating device according to claim 5, characterized in that The first coating mechanism also includes: The first trough assembly comprises: A material trough with an opening, the material trough is used to contain the first coating slurry, and the opening of the material trough faces the first roller body; A lifting drive mechanism, the lifting drive mechanism is drivingly connected to the material trough and is used to drive the material trough away from or close to the first roller body; The scraper assembly comprises a scraper which can be close to or away from the first roller surface, and the scraper is used to clean the first coating slurry overflowing from the first roller surface when it is pressed against the first roller surface.

7. The coating device according to claim 1, characterized in that, Also includes at least one of the following: An iron removal mechanism, disposed at the head end of the substrate running path, for removing iron impurities on the surface of the substrate; A tension adjustment mechanism, disposed upstream of the first coating mechanism, for adjusting the tension of the substrate between the first coating mechanism and the second coating mechanism; A color register mechanism, disposed at the tail end of the substrate running path, for controlling the positions of different slurry color groups on the substrate; The roller mechanism includes a plurality of fixed rollers and adjusting rollers, which are distributed at different positions of the substrate running path and are used to guide the substrate to move along the running path.

8. The coating device according to any one of claims 1 to 7, characterized in that: The equipment body includes a frame, the first coating mechanism and the second coating mechanism are installed at set positions of the frame, the frame is provided with a substrate inlet area and a substrate outlet area, the head end of the substrate running path is located in the substrate inlet area, and the tail end is located in the substrate outlet area.

9. A coating control method for a coating device, characterized in that, include: Obtaining a coating mode instruction according to a target coating thickness parameter of the substrate, the instruction comprising a first coating mode, a second coating mode or a third coating mode; In response to the coating mode instruction, the operating status of the first coating mechanism and the second coating mechanism is controlled; wherein, in the first coating mode, only the first coating mechanism is enabled, in the second coating mode, only the second coating mechanism is enabled, and in the third coating mode, the first coating mechanism and the second coating mechanism are enabled synchronously.

10. The coating control method according to claim 9, wherein The step of controlling the operating states of the first coating mechanism and the second coating mechanism in response to the coating mode instruction includes: In response to the first coating mode instruction, the second coating mechanism is controlled to stop running, and the first material trough of the first coating mechanism is driven to move to the working position of the first roller body; the first roller body is started to rotate clockwise, the scraper is driven to contact the surface of the first roller body to remove the overflow slurry, and the pressure roller is driven to press down so that the substrate is close to the surface of the first roller body; or, In response to the second coating mode instruction, the first coating mechanism is controlled to stop running, and the pressure roller of the first coating mechanism is driven to press down to the smooth surface of the first roller body to form a traction gap to transmit the substrate; the second material trough of the second coating mechanism is driven to move to the working position of the second roller body, and the second roller body is started to rotate counterclockwise, and the back roller assembly is driven to move so that the substrate is closely attached to the surface of the second roller body; or, In response to a third coating mode instruction, control the first coating mechanism and the second coating mechanism to operate synchronously, drive the first material tank of the first coating mechanism to move to the working position of the first roller body, start the first roller body to rotate clockwise, drive the squeegee to contact the surface of the first roller body to remove the overflow slurry, and drive the pressure roller to press down to make the substrate closely adhere to the surface of the first roller body; Drive the second material tank of the second coating mechanism to move to the working position of the second roller body, start the second roller body to rotate counterclockwise, and drive the back roller assembly to move so that the substrate closely adheres to the surface of the second roller body. Among them, the substrate is continuously conveyed through the first coating mechanism and the second coating mechanism in sequence.

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