Foil coating device

Abstract

The invention discloses a foil coating device which comprises a large roller, a rack, a translation mechanism and a coating mechanism, foil adheres to the roller surface of the large roller, the large roller is located on one side of the rack, the coating mechanism is movably connected to the rack, the translation mechanism is located on the rack, and the coating mechanism is located on the rack. The translation mechanism is used for driving the coating mechanism to perform reciprocating translation so as to be close to or away from the large roller, the coating mechanism comprises a supporting assembly, a feeding assembly arranged on the supporting assembly, a metering assembly and a coating assembly, and the feeding assembly comprises a material box, a feeding roller, a first driving motor, a first translation module and a first lifting module. The coating assembly comprises a coating roller and a second driving motor, the metering assembly comprises a metering roller, a third driving motor and a second lifting module, and the metering roller is located between the feeding roller and the coating roller. The thickness of the coating liquid on the surface of the foil can be uniform, and the product quality of the foil is improved.

Description

Technical Field

[0001] This invention relates to the field of coating equipment technology, and more specifically to a foil coating apparatus. Background Technology

[0002] Copper foil is a thin copper material manufactured through rolling or electrolytic deposition processes. Copper foil has high purity, good conductivity and processability, and is one of the key materials that are indispensable in the modern electronics industry. It is widely used in lithium battery current collectors, flexible printed circuit boards (FPCs), electromagnetic shielding materials and other fields.

[0003] However, copper foil has low surface energy and is easily oxidized. Therefore, the surface of copper foil needs to be pretreated. The general pretreatment method is to coat the surface of copper foil with passivation liquid using a coating device to improve its corrosion resistance, oxidation resistance and surface properties, enhance adhesion and conductivity and improve appearance.

[0004] Existing copper foil coating equipment often results in uneven passivation solution thickness on the copper foil surface. For example, thin areas of the coating are prone to oxidation, while thick areas are susceptible to stress cracking. Furthermore, coating ultra-thin foils (3-6 μm thick) presents several challenges compared to coating traditional thicker foils (6-18 μm thick): ultra-thin foils have lower tensile strength and elongation, making them prone to wrinkling and tearing. Traditional gravure and extrusion coating methods can damage the substrate, increasing product defect rates and making it difficult to guarantee coating uniformity. Ultra-thin foils are also more susceptible to oxidation due to their thinner surface. The thermal expansion coefficients of ultra-thin substrates are prone to mismatch, leading to warping. Additionally, ultra-thin foils have a relatively higher pinhole / particle rate. Therefore, these factors can negatively impact the surface oxidation resistance and quality of the foil, placing stringent demands on coating precision. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention provides a foil coating apparatus that can make the coating liquid thickness on the foil surface uniform and improve the product quality of the foil.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A foil coating apparatus includes a large roller, a frame, a translation mechanism, and a coating mechanism. Foil is adhered to the surface of the large roller, which is located on one side of the frame. The coating mechanism is movably connected to the frame. The translation mechanism drives the coating mechanism to reciprocate and move closer to or away from the large roller. The coating mechanism includes a support assembly, a feeding assembly, a metering assembly, and a coating assembly mounted on the support assembly. The feeding assembly includes a material box, a feeding roller, a first drive motor, a first translation module, and a first lifting module. The first drive motor drives the feeding roller to rotate. The material box stores coating liquid. The first translation module drives the feeding roller to translate along a vertical axis. The material box is located on the frame. Directly below the feeding roller, the first lifting module is used to drive the material box to rise and fall, and the feeding roller is used to pick up the coating liquid in the material box; the coating assembly includes a coating roller and a second drive motor, the second drive motor is used to drive the coating roller to rotate, the feeding roller and the coating roller transfer the coating liquid through the metering assembly, and the coating roller is used to coat the foil with the coating liquid; the metering assembly includes a metering roller, a third drive motor and a second lifting module, the third drive motor is used to drive the metering roller to rotate, the metering roller is located between the feeding roller and the coating roller, and the second lifting module is used to drive the metering roller to rise and fall, so that the metering roller moves away from or simultaneously moves closer to the feeding roller and the coating roller.

[0008] As a further improvement to the above technical solution, the support assembly includes a gantry frame and two wall panels disposed on the gantry frame. The two ends of the coating roller are rotatably connected to the two wall panels respectively, and the first translation module and the second lifting module are disposed on the wall panels.

[0009] As a further improvement to the above technical solution, the number of the first translation modules is two, and the two first translation modules are respectively arranged on the inner side of the two wall panels. The first translation module includes a first fixed frame, a first translation cylinder arranged on the first fixed frame, and a translation seat arranged on the output end of the first translation cylinder. The first fixed frame is fixedly connected to the inner side of the wall panel. The two ends of the feeding roller are respectively rotatably connected to the two translation seats. The first drive motor is installed on one of the translation seats and connected to one end of the feeding roller.

[0010] As a further improvement to the above technical solution, the feeding assembly further includes a first fine-tuning module. The first fine-tuning module is used to fine-tune the translational position of the feeding roller. The first fine-tuning module includes a first fine-tuning motor, a first lead screw, a first nut, a first wedge block, and a second wedge block. The first fine-tuning motor is mounted on the first fixed frame. The first lead screw is rotatably connected to the first fixed frame. The first lead screw is vertically arranged and connected to the output shaft of the first fine-tuning motor. The first nut is threadedly connected to the first lead screw. The first wedge block is disposed on the first nut. The second wedge block is disposed on the translational seat. An inclined surface is provided on the opposite side of both the first wedge block and the second wedge block. The inclined surface of the first wedge block cooperates with the inclined surface of the second wedge block.

[0011] As a further improvement to the above technical solution, the feeding assembly further includes a first detection module. The first detection module is used to detect the displacement of the translation seat. The first detection module includes a first support, a second support, a first position sensor, a first dial indicator, a first sensing block, and a first stop. The first support is disposed on the first fixed frame, the second support is disposed on the translation seat, the first position sensor and the first stop are disposed on the first support, and the first dial indicator and the first sensing block are disposed on the second support. The sensing head of the first position sensor corresponds to the first sensing block, and the probe of the first dial indicator corresponds to the first stop.

[0012] As a further improvement to the above technical solution, a first limiting block is provided on the first support, and a second limiting block is provided on the second support, with the first limiting block corresponding to the second limiting block.

[0013] As a further improvement to the above technical solution, a first accordion cover is connected between the first support and the second support.

[0014] As a further improvement to the above technical solution, the first lifting module is mounted on the translation base. The first lifting module includes a mounting plate, a rodless cylinder mounted on the mounting plate, and a support frame mounted on the output end of the rodless cylinder. The mounting plate is fixed on the translation base, the rodless cylinder is vertically arranged, and the material box is mounted on the support frame.

[0015] As a further improvement to the above technical solution, there are two second lifting modules, which are respectively arranged on the inner side of the two wall panels. Each second lifting module includes a second fixing frame, a lifting cylinder arranged on the second fixing frame, and a lifting seat connected to the output end of the lifting cylinder. The two second fixing frames are respectively fixed on the inner side of the two wall panels. The two ends of the metering roller are respectively rotatably connected to the two lifting seats. The third drive motor is installed on one of the lifting seats and connected to one end of the metering roller.

[0016] As a further improvement to the above technical solution, the metering component further includes a second fine-tuning module. The second fine-tuning module is used to fine-tune the position of the metering roller in the vertical direction. The second fine-tuning module includes a second fine-tuning motor, a second lead screw, a second nut, a third wedge block, and a fourth wedge block. The second fine-tuning motor is mounted on the second fixed frame. The second lead screw is rotatably connected to the second fixed frame and is horizontally set. The second lead screw is connected to the output shaft of the second fine-tuning motor. The second nut is threadedly connected to the second lead screw. The third wedge block is set on the second nut, and the fourth wedge block is set on the lifting seat. The opposite sides of the third wedge block and the fourth wedge block are provided with inclined surfaces, and the inclined surface of the third wedge block cooperates with the inclined surface of the fourth wedge block.

[0017] As a further improvement to the above technical solution, the metering component further includes a second detection module. The second detection module is used to detect the displacement of the lifting seat. The second detection module includes a third support, a fourth support, a second position sensor, a second dial indicator, a second sensing block, and a second stop. The third support is disposed on the second fixed frame, the fourth support is disposed on the lifting seat, the second position sensor and the second stop are disposed on the third support, and the second dial indicator and the second sensing block are disposed on the fourth support. The sensing head of the second position sensor corresponds to the second sensing block, and the probe of the second dial indicator corresponds to the second stop.

[0018] As a further improvement to the above technical solution, a third limiting block is provided on the third support, and a fourth limiting block is provided on the fourth support, with the third limiting block corresponding to the fourth limiting block.

[0019] As a further improvement to the above technical solution, a second bellows cover is connected between the third support and the fourth support.

[0020] As a further improvement to the above technical solution, the translation mechanism includes a second translation module and a third translation module; the second translation module includes a fourth drive motor, a third lead screw, a third nut, a base, a first slider, and a first guide rail. The fourth drive motor is mounted on the frame, and the frame is provided with two bearing seats. The two ends of the third lead screw are rotatably connected to the two bearing seats respectively. The fourth drive motor is used to drive the third lead screw to rotate. The third nut is threadedly connected to the third lead screw. The base is fixedly connected to the third nut. The first slider is located at the bottom of the base, and the first guide rail is located on the frame, with the first slider slidably connected to the first guide rail. The third translation module includes a second translation cylinder, a second slider, and a second guide rail. The second translation cylinder is mounted on the base, and the telescopic rod of the second translation cylinder is connected to the gantry frame. The second slider is located at the bottom of the gantry frame, and the second guide rail is located at the top of the base, with the second slider slidably connected to the second guide rail.

[0021] As a further improvement to the above technical solution, both wall panels are provided with a flattening assembly. The flattening assembly includes a third lifting module, a support rod provided on the third lifting module, an air knife and a sponge clamp connected to the support rod. The air outlet of the air knife faces the edge of the coating roller to blow thin the coating liquid at the edge of the coating roller. The sponge clamp is used to hold the sponge to flatten the coating liquid at the edge of the coating roller.

[0022] The beneficial effects of this invention are:

[0023] 1. This invention provides a foil coating apparatus. By setting up a feeding component, a metering component, and a coating component, closed-loop control of coating accuracy and quality can be achieved. Specifically, by controlling the gap between the metering roller and the coating roller, the thickness of the coating liquid layer on the surface of the coating roller can be precisely controlled. Furthermore, by controlling the contact pressure between the coating roller and the foil on the large roller, precise control of the foil coating thickness can be achieved. This ensures that the coating liquid on the surface of the foil fills the pores of the ultra-thin foil surface, resulting in a uniform coating thickness and improved foil coating quality.

[0024] 2. This invention provides a foil coating apparatus. By setting a first fine-tuning module and a second fine-tuning module, the first fine-tuning module can fine-tune the position of the feeding roller in the horizontal direction, and the second fine-tuning module can fine-tune the position of the metering roller in the vertical direction, with an adjustment accuracy of 0.01 mm. This further improves the accuracy of the coating liquid transfer, thereby improving the foil coating precision. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a structural schematic diagram provided by an example of the present invention;

[0027] Figure 2 yes Figure 1 A structural diagram of the frame, translation mechanism, and support components;

[0028] Figure 3 yes Figure 1 Cross-sectional view of the coating mechanism;

[0029] Figure 4 yes Figure 1 Schematic diagram of the central feeding assembly;

[0030] Figure 5 yes Figure 4 A partial structural schematic diagram of the first translation module and the first fine-tuning module;

[0031] Figure 6 yes Figure 1 A schematic diagram of the structure of the metering component;

[0032] Figure 7 yes Figure 6 A partial structural diagram of the second lifting module and the second fine-tuning module;

[0033] Figure 8 yes Figure 1 Schematic diagram of the intermediate coating assembly and the flattening assembly;

[0034] Figure 9 yes Figure 8 Schematic diagram of the structure of the flattening component;

[0035] Figure 10 yes Figure 4 Enlarged view of point A in the middle.

[0036] Figure label:

[0037] 1-Large roller;

[0038] 2-Rack;

[0039] 3-Translation mechanism, 31-Second translation module, 32-Third translation module, 311-Fourth drive motor, 312-Third lead screw, 313-Third nut, 314-Base, 315-First slider, 316-First guide rail, 321-Second translation cylinder, 322-Second slider, 323-Second guide rail;

[0040] 4-Coating mechanism, 41-Support assembly, 42-Feeding assembly, 43-Metering assembly, 44-Coating assembly, 45-Flattening assembly, 411-Gantry frame, 412-Wall panel, 421-Material box, 422-Feeding roller, 423-First drive motor, 424-First translation module, 425-First lifting module, 426-First fine-tuning module, 427-First detection module, 431-Metering roller, 432-Third drive motor, 433- Second lifting module, 434-Second fine-tuning module, 435-Second detection module, 441-Coating roller, 442-Second drive motor, 4241-First fixed frame, 4242-First translation cylinder, 4243-Translation seat, 4251-Mounting plate, 4252-Rodless cylinder, 4253-Support frame, 4261-First fine-tuning motor, 4262-First lead screw, 4263-First nut, 4264-First wedge block, 4265- Second wedge block, 4266-Third slider, 4267-Third guide rail, 4271-First support, 4272-Second support, 4273-First position sensor, 4274-First dial indicator, 4275-First sensing block, 4276-First stop block, 4331-Second fixing frame, 4332-Lifting cylinder, 4333-Lifting seat, 4341-Second fine-tuning motor, 4342-Second lead screw, 4343-Second nut, 434 4-Third wedge block, 4345-Fourth wedge block, 4351-Third support, 4352-Fourth support, 4353-Second position sensor, 4354-Second dial indicator, 4355-Second sensing block, 4356-Second stop block, 451-Third lifting module, 452-Support rod, 453-Air knife, 454-Sponge clamp, 455-Fifth support, 456-First locking element, 457-Sixth support, 458-Second locking element. Detailed Implementation

[0041] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0042] Reference Figure 1 and Figure 3An embodiment of the present invention provides a foil coating apparatus, including a large roller 1, a frame 2, a translation mechanism 3, and a coating mechanism 4. The foil is adhered to the roller surface of the large roller 1, which is located on one side of the frame 2. The coating mechanism 4 is movably connected to the frame 2. The translation mechanism 3 is used to drive the coating mechanism 4 to reciprocate to move closer to or away from the large roller 1. The coating mechanism 4 includes a support assembly 41, a feeding assembly 42, a metering assembly 43, and a coating assembly 44 disposed on the support assembly 41.

[0043] Reference Figure 4 Structurally, the feeding assembly 42 includes a material box 421, a feeding roller 422, a first drive motor 423, a first translation module 424, and a first lifting module 425. The first drive motor 423 is used to drive the feeding roller 422 to rotate. The material box 421 is used to store coating liquid. The first translation module 424 is used to drive the feeding roller 422 to translate along the vertical axis. The material box 421 is located directly below the feeding roller 422. The first lifting module 425 is used to drive the material box 421 to lift. The feeding roller 422 is used to pick up the coating liquid in the material box 421.

[0044] Reference Figure 8 The coating assembly 44 includes a coating roller 441 and a second drive motor 442. The second drive motor 442 is used to drive the coating roller 441 to rotate. The feed roller 422 and the coating roller 441 transfer the coating liquid through the metering assembly 43. The coating roller 441 is used to coat the coating liquid onto the foil.

[0045] Preferably, the coating roller 441 is a heated roller, which can accelerate the evaporation of the solvent in the coating liquid, so that the solute in the coating liquid comes into close contact with the copper foil, enhances the adhesion, and allows the electrochemical reaction to occur fully.

[0046] More preferably, the coating roller 441 is heated by hot oil, which circulates in the cavity or channel inside the coating roller 441, thereby uniformly transferring heat to the working surface of the coating roller 441 and avoiding uneven coating thickness or surface defects of the foil due to uneven roller surface temperature.

[0047] Reference Figure 6 The metering component 43 includes a metering roller 431, a third drive motor 432, and a second lifting module 433. The third drive motor 432 is used to drive the metering roller 431 to rotate. The metering roller 431 is located between the feeding roller 422 and the coating roller 441. The second lifting module 433 is used to drive the metering roller 431 to rise and fall, so that the metering roller 431 moves away from or simultaneously moves closer to the feeding roller 422 and the coating roller 441.

[0048] During coating, the first translation module 424 drives the feed roller 422 to translate closer to the coating roller 441, and the first lifting module 425 drives the material box 421 to rise, immersing the bottom of the feed roller 422 in the coating liquid. Then, the first drive motor 423 drives the feed roller 422 to rotate, allowing it to pick up the coating liquid. Next, the second lifting module 433 drives the metering roller 431 to descend, bringing its surface close to both the feed roller 422 and the coating roller 441, ensuring a certain gap between them. Simultaneously, the third drive motor 432 drives the metering roller 431 to rotate, and the second drive motor 442 drives the coating roller 441 to rotate. The first shift mechanism 422 transfers the coating liquid on the feeding roller 422 to the metering roller 431, and the coating liquid on the metering roller 431 is transferred to the coating roller 441. Finally, the translation mechanism 3 drives the coating mechanism 4 to move closer to the large roller 1, so that the roller surface of the coating roller 441 contacts the foil on the large roller 1. The foil is continuously moved by rotating the large roller 1, so that the coating liquid on the coating roller 441 is evenly coated on the surface of the foil. After the coating is completed, the translation mechanism 3 drives the coating mechanism 4 to move away from the large roller 1. The second lifting module 433 drives the metering roller 431 to rise and reset, the first translation mechanism drives the feeding roller 422 to move and reset, and the first lifting module 425 drives the material box 421 to descend to the initial position, completing a single cycle.

[0049] Therefore, by controlling the gap between the metering roller 431 and the coating roller 441, the thickness of the coating liquid layer on the surface of the coating roller 441 can be precisely controlled. By controlling the contact pressure between the coating roller 441 and the foil on the large roller 1, the accuracy of the foil coating thickness can be achieved. Thus, the coating liquid on the surface of the foil can fill the pores of the ultra-thin foil surface, making the coating thickness uniform and improving the coating quality of the foil.

[0050] It should be noted that the coating liquid can be a passivation liquid, or other liquids such as adhesives or antioxidants. No specific limitations are made in this embodiment. Those skilled in the art can select a suitable coating liquid according to different process requirements.

[0051] Reference Figure 2 In some preferred embodiments, the support assembly 41 includes a gantry frame 411, two wall panels 412 disposed on the gantry frame 411, the two ends of the coating roller 441 being rotatably connected to the two wall panels 412 respectively, and a first translation module 424 and a second lifting module 433 disposed on the wall panels 412.

[0052] Furthermore, there are two first translation modules 424, which are respectively disposed on the inner side of the two wall panels 412. Each first translation module 424 includes a first fixed frame 4241, a first translation cylinder 4242 disposed on the first fixed frame 4241, and a translation seat 4243 disposed on the output end of the first translation cylinder 4242. The first fixed frame 4241 is fixedly connected to the inner side of the wall panel 412. The two ends of the feeding roller 422 are respectively rotatably connected to the two translation seats 4243. The first drive motor 423 is installed on one of the translation seats 4243 and connected to one end of the feeding roller 422.

[0053] Understandably, the two first translation cylinders 4242 drive the two ends of the feeding roller 422 to translate, which can make the two ends of the feeding roller 422 evenly stressed and prevent the feeding roller 422 from tilting. On the one hand, it can ensure the uniformity of the amount of coating liquid dipped, and on the other hand, it can keep the feeding roller 422 parallel to the metering roller 431, improving the accuracy of the amount of coating liquid transferred.

[0054] Reference Figure 4 and Figure 5 Furthermore, the feeding assembly 42 also includes a first fine-tuning module 426, which is used to fine-tune the translational position of the feeding roller 422. The first fine-tuning module 426 includes a first fine-tuning motor 4261, a first lead screw 4262, a first nut 4263, a first wedge block 4264, and a second wedge block 4265. The first fine-tuning motor 4261 is mounted on the first fixed frame 4241, and the first lead screw 4262 is rotatably connected to the first fixed frame 4241. The first lead screw 4262 is vertically arranged and connected to the output shaft of the first fine-tuning motor 4261. The first nut 4263... 4263 is threadedly connected to the first lead screw 4262. The first fixed frame 4241 is provided with a third guide rail 4267. A third slider 4266 is connected to one side of the first nut 4263. The third slider 4266 is slidably connected to the third guide rail 4267. The third guide rail 4267 is vertically arranged. The first wedge block 4264 is provided on the first nut 4263. The second wedge block 4265 is provided on the translation seat 4243. The opposite sides of the first wedge block 4264 and the second wedge block 4265 are provided with inclined surfaces. The inclined surface of the first wedge block 4264 cooperates with the inclined surface of the second wedge block 4265.

[0055] Understandably, when the first translation cylinder 4242 drives the translation seat 4243 to translate to one side of the coating roller 441, the inclined surface of the first wedge block 4264 engages with the inclined surface of the second wedge block 4265. The first fine-tuning motor 4261 drives the first lead screw 4262 to rotate, and the first nut 4263 moves along the axial direction of the first lead screw 4262. At the same time, the third slider 4266 connected to the first nut 4263 slides along the third guide rail 4267 to provide vertical guidance for the first nut 4263. The first nut 4263 drives the first wedge block 4264 to move vertically, so that the vertical movement of the first wedge block 4264 is converted into the horizontal movement of the second wedge block 4265. This pushes the translation seat 4243 to fine-tune the horizontal position of the feed roller 422, thereby accurately controlling the position of both ends of the feed roller 422 and further ensuring the accuracy of the coating liquid transfer amount.

[0056] Reference Figure 4 and Figure 10 Furthermore, the feeding assembly 42 also includes a first detection module 427, which is used to detect the displacement of the translation seat 4243. The first detection module 427 includes a first support 4271, a second support 4272, a first position sensor 4273, a first dial indicator 4274, a first sensing block 4275, and a first stop 4276. The first support 4271 is mounted on the first fixed frame 4241, the second support 4272 is mounted on the translation seat 4243, the first position sensor 4273 and the first stop 4276 are mounted on the first support 4271, and the first dial indicator 4274 and the first sensing block 4275 are mounted on the second support 4272. The sensing head of the first position sensor 4273 corresponds to the first sensing block 4275, and the probe of the first dial indicator 4274 corresponds to the first stop 4276.

[0057] Understandably, during the movement of the translation seat 4243, the first position sensor 4273 can convert the change in the distance between its sensing head and the first sensing block 4275 into an electrical signal and transmit it to the control system of the equipment. This allows for real-time dynamic monitoring of the displacement at both ends of the feed roller 422. Simultaneously, the probe of the first dial indicator 4274 contacts and is pressed against the first baffle, causing the mechanical pointer of the first dial indicator 4274 to deflect. By manually reading the scale value on the first dial indicator 4274, the positional changes at both ends of the feed roller 422 can be directly monitored. Therefore, through the dual detection of the first position sensor 4273 and the first dial indicator 4274, real-time precision monitoring of the translational position of the feed roller 422 can be achieved. This facilitates dynamic error compensation at both ends of the feed roller 422, improving the stability and accuracy of the coating process.

[0058] Furthermore, a first limiting block is provided on the first support 4271, and a second limiting block is provided on the second support 4272. The first limiting block corresponds to the second limiting block. When the translation seat 4243 moves, the translation seat 4243 drives the second limiting block on the second support 4272 to approach or move away from the first limiting block on the first support 4271. The first limiting block can hard limit the second limiting block, thereby preventing damage to the probe of the first dial indicator 4274 or other parts, and improving the service life of the equipment.

[0059] Furthermore, a first bellows cover is connected between the first support 4271 and the second support 4272. The first bellows cover can shield and protect the first position sensor 4273, the first stop block 4276, the first dial indicator 4274 and the first sensing block 4275, thereby preventing external foreign objects from damaging the parts or affecting the detection accuracy of the first position sensor 4273 and the first dial indicator 4274.

[0060] In some preferred embodiments, the first lifting module 425 is mounted on the translation seat 4243. The first lifting module 425 includes a mounting plate 4251, a rodless cylinder 4252 mounted on the mounting plate 4251, and a support frame 4253 mounted on the output end of the rodless cylinder 4252. The mounting plate 4251 is fixed on the translation seat 4243, the rodless cylinder 4252 is vertically arranged, and the material box 421 is mounted on the support frame 4253.

[0061] Understandably, by driving the material box 421 to rise and fall using the rodless cylinder 4252, the height position of the material box 421 can be adjusted quickly and accurately. Compared with conventional telescopic cylinders, the rodless cylinder 4252 omits the external piston rod, thereby reducing the axial space occupied and facilitating the assembly and layout of equipment components. At the same time, the guide column of the rodless cylinder 4252 can guide the material box 421, improving the stability of the material box 421 during rising and falling and preventing the material box 421 from shaking and causing liquid surface fluctuations.

[0062] Reference Figure 6 and Figure 7 In some preferred embodiments, there are two second lifting modules 433, which are respectively disposed on the inner side of two wall panels 412. Each second lifting module 433 includes a second fixing frame 4331, a lifting cylinder 4332 disposed on the second fixing frame 4331, and a lifting seat 4333 connected to the output end of the lifting cylinder 4332. The two second fixing frames 4331 are respectively fixed on the inner side of the two wall panels 412. The two ends of the metering roller 431 are respectively rotatably connected to the two lifting seats 4333. A third drive motor 432 is installed on one of the lifting seats 4333 and connected to one end of the metering roller 431.

[0063] Understandably, the two lifting cylinders 4332 drive the two ends of the metering roller 431 to rise and fall respectively, which can make the two ends of the metering roller 431 bear force evenly and prevent the metering roller 431 from tilting during the rise and fall. This ensures the uniformity and accuracy of the amount of coating liquid transferred on the surface of the metering roller 431, thereby improving the coating accuracy of the foil.

[0064] Furthermore, the metering assembly 43 also includes a second fine-tuning module 434, which is used to fine-tune the position of the metering roller 431 in the vertical direction. The second fine-tuning module 434 includes a second fine-tuning motor 4341, a second lead screw 4342, a second nut 4343, a third wedge block 4344, and a fourth wedge block 4345. The second fine-tuning motor 4341 is mounted on the second fixed frame 4331, and the second lead screw 4342 is rotatably connected to the second fixed frame 4331. Two lead screws 4342 are horizontally arranged. The second lead screw 4342 is connected to the output shaft of the second fine-tuning motor 4341. The second nut 4343 is threadedly connected to the second lead screw 4342. The third wedge block 4344 is set on the second nut 4343. The fourth wedge block 4345 is set on the lifting seat 4333. The opposite sides of the third wedge block 4344 and the fourth wedge block 4345 are provided with inclined surfaces. The inclined surface of the third wedge block 4344 cooperates with the inclined surface of the fourth wedge block 4345.

[0065] Understandably, when the lifting cylinder 4332 drives the lifting seat 4333 to descend, the lifting seat 4333 drives the fourth wedge block 4345 to descend. The inclined surface of the fourth wedge block 4345 cooperates with the inclined surface of the third wedge block 4344. The second fine-tuning motor 4341 drives the fourth lead screw to rotate, and the second nut 4343 moves along the axial direction of the second lead screw 4342, driving the third wedge block 4344 to move horizontally. This converts the horizontal movement of the third wedge block 4344 into the vertical movement of the fourth wedge block 4345, thereby pushing the lifting seat 4333 to fine-tune the position of the metering roller 431 in the vertical direction. Thus, the height position of both ends of the metering roller 431 can be precisely controlled, further ensuring the uniformity and accuracy of the coating liquid transfer.

[0066] Furthermore, the metering component 43 also includes a second detection module 435, which is used to detect the displacement of the lifting seat 4333. The second detection module 435 includes a third support 4351, a fourth support 4352, a second position sensor 4353, a second dial indicator 4354, a second sensing block 4355, and a second stop 4356. The third support 4351 is mounted on the second fixed frame 4331, the fourth support 4352 is mounted on the lifting seat 4333, the second position sensor 4353 and the second stop 4356 are mounted on the third support 4351, and the second dial indicator 4354 and the second sensing block 4355 are mounted on the fourth support 4352. The sensing head of the second position sensor 4353 corresponds to the second sensing block 4355, and the probe of the second dial indicator 4354 corresponds to the second stop 4356.

[0067] Understandably, during the lifting process of the lifting seat 4333, the second position sensor 4353 can convert the change in the distance between its sensing head and the second sensing block 4355 into an electrical signal and transmit it to the control system of the equipment. This allows for real-time dynamic monitoring of the position at both ends of the metering roller 431. Simultaneously, the probe of the second dial gauge 4354 contacts and is pressed against the second baffle, causing the mechanical pointer of the second dial gauge 4354 to deflect. By manually reading the scale value on the second dial gauge 4354, the positional changes at both ends of the metering roller 431 can be directly monitored. Therefore, through the dual detection of the second position sensor 4353 and the second dial gauge 4354, real-time and accurate monitoring of the position of the metering roller 431 during lifting can be achieved. This facilitates dynamic error compensation at both ends of the metering roller 431, improving the stability and accuracy of the coating process.

[0068] Furthermore, a third limit block is provided on the third support 4351, and a fourth limit block is provided on the fourth support 4352. The third limit block and the fourth limit block correspond to each other. When the lifting seat 4333 rises and falls, the lifting seat 4333 drives the fourth limit block on the fourth support 4352 to approach or move away from the third limit block on the third support 4351. The third limit block can hard limit the fourth limit block, thereby preventing damage to the probe of the second dial indicator 4354 or other parts, and improving the service life of the equipment.

[0069] Furthermore, a second bellows cover is connected between the third support 4351 and the fourth support 4352. The second bellows cover can shield and protect the second position sensor 4353, the second stop block 4356, the second dial indicator 4354 and the second sensing block 4355, thereby preventing external foreign objects from damaging the parts or affecting the detection accuracy of the second position sensor 4353 and the second dial indicator 4354.

[0070] Reference Figure 1 and Figure 2In some preferred embodiments, the translation mechanism 3 includes a second translation module 31 and a third translation module 32.

[0071] Specifically, the second translation module 31 includes a fourth drive motor 311, a third lead screw 312, a third nut 313, a base 314, a first slider 315, and a first guide rail 316. The fourth drive motor 311 is mounted on the frame 2, which has two bearing seats. The two ends of the third lead screw 312 are rotatably connected to the two bearing seats. The fourth drive motor 311 is used to drive the third lead screw 312 to rotate. The third nut 313 is threadedly connected to the third lead screw. The base 314 is fixedly connected to the third nut 313. The first slider 315 is mounted on the bottom of the base 314. The first guide rail 316 is mounted on the frame 2, and the first slider 315 is slidably connected to the first guide rail 316.

[0072] The third translation module 32 includes a second translation cylinder 321, a second slider 322, and a second guide rail 323. The second translation cylinder 321 is mounted on the base 314, and the telescopic rod of the second translation cylinder 321 is connected to the gantry frame 411. The second slider 322 is located at the bottom of the gantry frame 411, and the second guide rail 323 is located at the top of the base 314. The second slider 322 and the second guide rail 323 are slidably connected.

[0073] Understandably, the fourth drive motor 311 drives the third lead screw 312 to rotate, the third lead screw 312 drives the third nut 313 to translate, the third nut 313 drives the base 314 to translate, the base 314 drives the first slider 315 to slide along the first guide rail 316, thereby driving the gantry 411 and the feeding assembly 42, metering assembly 43 and coating assembly 44 set on the gantry 411 to translate as a whole. Furthermore, the second translation cylinder 321 drives the gantry 411 to translate, the gantry 411 drives the second slider 322 to slide along the second guide rail 323, thereby driving the gantry 411 and the feeding assembly 42, metering assembly 43 and coating assembly 44 set on the gantry 411 to perform a second translation, which can finely adjust the horizontal position of the gantry 411, thereby accurately controlling the translation position accuracy of the gantry 411 and improving the coating accuracy of the foil.

[0074] Reference Figure 8 and Figure 9 In some preferred embodiments, both wall panels 412 are provided with flattening components 45. The flattening components 45 include a third lifting module 451, a support rod 452 provided on the third lifting module 451, an air knife 453 connected to the support rod 452, and a sponge clamp 454. The air outlet of the air knife 453 faces the edge of the coating roller 441 to blow the coating liquid at the edge of the coating roller 441 thin. The sponge clamp 454 is used to hold the sponge to flatten the coating liquid at the edge of the coating roller 441, thereby ensuring that the coating of the foil is uniform.

[0075] Specifically, the air knife 453 is connected to the support rod 452 via the fifth support 455. A first locking member 456 is provided on one side of the fifth support 455. By turning the first locking member 456, the fifth support 455 and the support rod 452 can be locked or released, thereby facilitating the adjustment of the air outlet direction of the air knife 453 and adapting to coating rollers 441 of different sizes.

[0076] The sponge clip 454 is connected to the support rod 452 via the sixth support 457. A second locking member 458 is provided on one side of the sixth support 457. By turning the second locking member 458, the sixth support 457 and the support rod 452 can be locked or released, thereby facilitating the adjustment of the angle of the sponge clip 454 and adapting to coating rollers 441 of different sizes.

[0077] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A foil coating apparatus, characterized in that, The system includes a large roller, a frame, a translation mechanism, and a coating mechanism. Foil is adhered to the surface of the large roller, which is located on one side of the frame. The coating mechanism is movably connected to the frame. The translation mechanism is used to drive the coating mechanism to reciprocate and move closer to or away from the large roller. The coating mechanism includes a support assembly, a feeding assembly, a metering assembly, and a coating assembly disposed on the support assembly. The feeding assembly includes a material box, a feeding roller, a first drive motor, a first translation module, and a first lifting module. The first drive motor drives the feeding roller to rotate. The material box stores the coating liquid. The first translation module drives the feeding roller to translate along the vertical axis. The material box is located directly below the feeding roller. The first lifting module drives the material box to lift. The feeding roller picks up the coating liquid from the material box. The coating assembly includes a coating roller and a second drive motor. The second drive motor is used to drive the coating roller to rotate. The feeding roller and the coating roller transfer the coating liquid through the metering assembly. The coating roller is used to coat the coating liquid onto the foil. The metering component includes a metering roller, a third drive motor, and a second lifting module. The third drive motor is used to drive the metering roller to rotate. The metering roller is located between the feed roller and the coating roller. The second lifting module is used to drive the metering roller to move up and down so that the metering roller moves away from or simultaneously moves closer to the feed roller and the coating roller.

2. The foil coating apparatus according to claim 1, characterized in that, The support assembly includes a gantry frame and two wall panels mounted on the gantry frame. The two ends of the coating roller are rotatably connected to the two wall panels respectively. The first translation module and the second lifting module are mounted on the wall panels.

3. The foil coating apparatus according to claim 2, characterized in that, There are two first translation modules, which are respectively disposed on the inner side of the two wall panels. Each first translation module includes a first fixed frame, a first translation cylinder disposed on the first fixed frame, and a translation seat disposed on the output end of the first translation cylinder. The first fixed frame is fixedly connected to the inner side of the wall panel. The two ends of the feeding roller are respectively rotatably connected to the two translation seats. The first drive motor is mounted on one of the translation seats and connected to one end of the feeding roller.

4. The foil coating apparatus according to claim 3, characterized in that, The feeding assembly further includes a first fine-tuning module, which is used to fine-tune the translational position of the feeding roller. The first fine-tuning module includes a first fine-tuning motor, a first lead screw, a first nut, a first wedge block, and a second wedge block. The first fine-tuning motor is mounted on the first fixed frame. The first lead screw is rotatably connected to the first fixed frame and is vertically arranged. The first lead screw is connected to the output shaft of the first fine-tuning motor. The first nut is threadedly connected to the first lead screw. The first wedge block is disposed on the first nut. The second wedge block is disposed on the translational seat. Both the first wedge block and the second wedge block have inclined surfaces on opposite sides. The inclined surface of the first wedge block cooperates with the inclined surface of the second wedge block.

5. The foil coating apparatus according to claim 4, characterized in that, The feeding assembly further includes a first detection module for detecting the displacement of the translation seat. The first detection module includes a first support, a second support, a first position sensor, a first dial indicator, a first sensing block, and a first stop. The first support is mounted on the first fixed frame, the second support is mounted on the translation seat, the first position sensor and the first stop are mounted on the first support, and the first dial indicator and the first sensing block are mounted on the second support. The sensing head of the first position sensor corresponds to the first sensing block, and the probe of the first dial indicator corresponds to the first stop.

6. The foil coating apparatus according to claim 3, characterized in that, The first lifting module is mounted on the translation base. The first lifting module includes a mounting plate, a rodless cylinder mounted on the mounting plate, and a support frame mounted on the output end of the rodless cylinder. The mounting plate is fixed on the translation base, the rodless cylinder is vertically arranged, and the material box is mounted on the support frame.

7. The foil coating apparatus according to claim 2, characterized in that, The number of the second lifting modules is two, and the two second lifting modules are respectively arranged on the inner side of the two wall panels. The second lifting module includes a second fixing frame, a lifting cylinder arranged on the second fixing frame, and a lifting seat connected to the output end of the lifting cylinder. The two second fixing frames are respectively fixed on the inner side of the two wall panels. The two ends of the metering roller are respectively rotatably connected to the two lifting seats. The third drive motor is installed on one of the lifting seats and connected to one end of the metering roller.

8. The foil coating apparatus according to claim 7, characterized in that, The metering assembly further includes a second fine-tuning module, which is used to fine-tune the position of the metering roller in the vertical direction. The second fine-tuning module includes a second fine-tuning motor, a second lead screw, a second nut, a third wedge block, and a fourth wedge block. The second fine-tuning motor is mounted on the second fixed frame. The second lead screw is rotatably connected to the second fixed frame and is horizontally positioned. The second lead screw is connected to the output shaft of the second fine-tuning motor. The second nut is threadedly connected to the second lead screw. The third wedge block is disposed on the second nut, and the fourth wedge block is disposed on the lifting seat. Both the third and fourth wedge blocks have inclined surfaces on opposite sides, and the inclined surfaces of the third and fourth wedge blocks cooperate with each other.

9. A foil coating apparatus according to claim 8, characterized in that, The metering component further includes a second detection module for detecting the displacement of the lifting seat. The second detection module includes a third support, a fourth support, a second position sensor, a second dial indicator, a second sensing block, and a second stop. The third support is mounted on the second fixed frame, the fourth support is mounted on the lifting seat, the second position sensor and the second stop are mounted on the third support, and the second dial indicator and the second sensing block are mounted on the fourth support. The sensing head of the second position sensor corresponds to the second sensing block, and the probe of the second dial indicator corresponds to the second stop.

10. A foil coating apparatus according to claim 2, characterized in that, The translation mechanism includes a second translation module and a third translation module; The second translation module includes a fourth drive motor, a third lead screw, a third nut, a base, a first slider, and a first guide rail. The fourth drive motor is mounted on the frame, and the frame has two bearing seats. The two ends of the third lead screw are rotatably connected to the two bearing seats respectively. The fourth drive motor is used to drive the third lead screw to rotate. The third nut is threadedly connected to the third lead screw. The base is fixedly connected to the third nut. The first slider is located at the bottom of the base, and the first guide rail is mounted on the frame. The first slider is slidably connected to the first guide rail. The third translation module includes a second translation cylinder, a second slider, and a second guide rail. The second translation cylinder is mounted on the base, and the telescopic rod of the second translation cylinder is connected to the gantry frame. The second slider is located at the bottom of the gantry frame, and the second guide rail is located at the top of the base. The second slider and the second guide rail are slidably connected.

11. A foil coating apparatus according to claim 2, characterized in that, Both wall panels are equipped with a flattening assembly, which includes a third lifting module, a support rod disposed on the third lifting module, an air knife and a sponge clamp connected to the support rod. The air outlet of the air knife faces the edge of the coating roller to blow thin the coating liquid at the edge of the coating roller, and the sponge clamp is used to hold the sponge to flatten the coating liquid at the edge of the coating roller.

Images