A high-precision flat-plate slot coating system

Abstract

The application relates to a high-precision flat-plate narrow-slit coating system which comprises a frame unit and an air-floating movable die head unit, the air-floating movable die head unit is suspended on the frame unit; the frame unit comprises an upper platform frame assembly and a lower frame assembly, the upper platform frame assembly comprises a marble platform, the marble platform is arranged on the lower frame assembly; the air-floating movable die head unit comprises a die head moving frame assembly, a die head lifting assembly and a die head, the die head moving frame assembly comprises two wall plates which are symmetrical left and right, wall plate connecting plates are arranged between the two wall plates; the bottom end of the wall plate is connected with one end of an air-floating upper bottom plate, the other end of the air-floating upper bottom plate is connected with the top end of an air-floating side plate perpendicularly, the bottom end of the air-floating side plate is connected with an air-floating lower bottom plate perpendicularly, thereby the air-floating upper bottom plate, the air-floating side plate and the air-floating lower bottom plate form a C-shaped groove for translation along the marble platform; air-floating blocks are arranged on the air-floating upper bottom plate, the air-floating side plate and the air-floating lower bottom plate respectively; a lower connecting beam is arranged between the two air-floating lower bottom plates and is connected with the die head, and the die head is connected with the die head lifting assembly for driving the die head to lift. The high-precision cooperation of various units realizes nanometer-level high-precision and high-efficiency flat-plate coating, greatly improves the stability and consistency of the whole machine operation, and is favorable for the high-efficiency automation and mass production of the coating system.

Description

Technical Field

[0001] This invention relates to the field of flatbed coating machine technology, and more particularly to a high-precision flatbed slit coating system. Background Technology

[0002] Slot die coating (SDC) is a coating technology that uses pressure to force a coating liquid through a die slit onto a moving substrate. It represents the future direction of wet coating due to its high coating speed, good coating uniformity, and wide coating window. The working principle of slot die coating is as follows: the coating liquid, under pressure and maintained at a certain flow rate, is forced out through the lip of the coating die and coated onto the substrate surface. Compared to other coating methods, it has many advantages, such as high coating speed, high precision, uniform wet thickness, closed system, high slurry utilization, and the ability to perform multiple coatings simultaneously. The application of slot coating (SDC) has shifted from traditional film and papermaking to the new energy sector, particularly in solar cells and lithium-ion battery electrode coating. It is used not only for optical films (brightness enhancement films, hard coats, polarizing films, diffusion films, etc.) and OLED coating, but also for coating roll substrates such as organic photovoltaic (OPV) solar cells and perovskite photovoltaic (PVK) solar cells, as well as for photoresist coating on discontinuous substrates such as LCD glass substrates. Although SDC technology is maturing, even small technological improvements can significantly reduce costs and generate substantial economic benefits for industrial production.

[0003] In the rapidly developing solar cell industry, the photoelectric conversion efficiency of monocrystalline silicon solar cells can reach up to about 24%, while perovskite solar cells achieve 29.1% in silicon-based tandem cells. Perovskite solar cells have the potential to achieve higher efficiency and extremely low production costs, making them the fastest-growing solar technology currently. However, perovskite solar cells require even higher precision in their surface films. Current flat-plate coating technologies are limited by mechanical movement errors and cannot meet these higher precision requirements. Furthermore, most perovskite flat-plate coating machines on the market are desktop, experimental models, unsuitable for automated production lines of large-area perovskite solar cells. Moreover, current coating equipment suffers from low automation and low production efficiency, failing to meet the mass production needs of large-area perovskite solar cells.

[0004] Therefore, a nanoscale high-precision flat slit coating system is needed, which can be applied to perovskite solar cells, LED screens, optical coating and other fields. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a high-precision flat slit coating system. The die head adopts a floating and suspending translational method, and the whole machine has no rigid guide rails, which improves the stability and consistency of the whole machine and achieves nanometer-level precision while running more smoothly and at high speed.

[0006] The objective of this invention is achieved as follows: A high-precision flat slit coating system includes a frame unit and an air-float moving die unit, the air-float moving die unit being suspended on the frame unit; the frame unit includes an upper platform frame assembly and a lower frame assembly, the upper platform frame assembly including a marble platform, the marble platform being disposed on the lower frame assembly. The air-floating movable mold head unit includes a mold head moving frame assembly, a mold head lifting assembly, and a mold head. The mold head moving frame assembly includes two symmetrical wall panels connected by a wall panel connecting plate. The bottom end of each wall panel is connected to an air-floating trough, which is fitted onto the edge of the marble platform. The inner wall of the air-floating trough has at least one air-floating block. A lower connecting beam connects the two air-floating troughs. The bottom surface of the lower connecting beam is fitted with a mold head mounting plate, and the mold head is connected to the mold head lifting assembly for driving the mold head to rise and fall. The marble platform is equipped with a coating platform unit, which includes an adsorption platform assembly and a coating platform base plate assembly arranged vertically. The adsorption platform assembly includes a marble adsorption table, and the coating platform base plate assembly includes a guide column plate and a coating platform base plate arranged vertically and horizontally. The guide column plate has three evenly distributed reference spheres, on which the marble adsorption table is placed. The coating platform base plate is connected to the guide column plate through a lifting cylinder. The guide column plate has an array of support tubes. The marble adsorption table has through holes corresponding to the support tubes. The support tubes pass through the through holes of the marble adsorption table. The plate to be coated is placed on the array of support tubes. The lifting cylinder drives the guide column plate to rise and fall, and moves the plate to be coated through the support tubes.

[0007] Furthermore, the air flotation tank includes an upper air flotation plate, an air flotation side plate, and an air flotation lower air flotation plate. One end of the upper air flotation plate is connected to the top of the air flotation side plate, and the other end of the upper air flotation plate is perpendicularly connected to the top of the air flotation side plate. The bottom end of the air flotation side plate is perpendicularly connected to the lower air flotation plate. Thus, the upper air flotation plate, the air flotation side plate, and the lower air flotation plate form a C-shaped air flotation tank for translational movement along the marble platform.

[0008] Furthermore, the mold head lifting assembly includes a lifting slide assembly, which includes a lifting slide base. The lifting slide base has protrusions on its left and right sides, and linear guide rails are provided on the protrusions. A lifting slide upper plate is slidably mounted on the linear guide rails. A motor base is provided at one end of the lifting slide base. The motor base is connected to a servo motor. The servo motor is connected to a ball screw through a coupling. The nut seat on the ball screw is connected to the lifting slide upper plate, thereby realizing the servo motor driving the lifting slide upper plate to move up and down.

[0009] Furthermore, the mold head lifting assembly includes a mold head lifting base assembly, which includes a mold head lifting seat connecting plate and two mold head lifting seat side plates. The left and right ends of the mold head lifting seat connecting plate are each vertically connected to a mold head lifting seat side plate. A cylinder connecting seat connects the left and right mold head lifting seat side plates. The cylinder connecting seat of the mold head lifting base assembly is connected to a lifting cylinder via a cylinder floating joint. The lifting slide base of the lifting slide assembly is fixed to the outer wall of the mold head moving frame assembly. The upper lifting plate of the lifting slide assembly is connected to the mold head lifting seat connecting plate, thereby enabling a servo motor to drive the upper lifting plate to move, which in turn moves the mold head lifting seat connecting plate, thereby moving the mold head mounting plate and the mold head.

[0010] Furthermore, the marble platform is also equipped with a cleaning unit, which includes a cleaning tank assembly, a cleaning transmission assembly, and a cleaning spray assembly. The cleaning tank assembly includes a cleaning tank mounted on the bottom plate of the cleaning area, with a cleaning tank cover plate on the top surface of the cleaning tank and a V-shaped groove inside the cleaning tank. The cleaning transmission assembly includes a cleaning transmission mounting base plate, with a drive wheel at one end and a driven wheel at the other end. The drive wheel and the driven wheel are connected by a synchronous belt, which is equipped with toothed clamps. The drive wheel shaft is connected to a cleaning motor via a reducer.

[0011] Furthermore, the cleaning spray assembly includes a spray base, with spray mounting seats at both ends of the spray base. The inner sidewalls of the two spray mounting seats are provided with diffusion nozzles, direct spray nozzles, and air knife nozzles. The spray base of the cleaning spray assembly is fixed on the toothed clamping block of the cleaning transmission assembly. The cleaning motor drives the synchronous belt transmission to move the cleaning spray assembly on the toothed clamping block, thereby achieving reciprocating comprehensive cleaning and drying.

[0012] Furthermore, a spray boss is provided in the middle of the inner wall of the spray mounting base. The spray boss has a right-angled trapezoidal cross-section with the inclined surface facing downwards. A diffusion nozzle is provided on the inclined surface, and a sealing plug is provided on the spray boss. A wind knife nozzle and two direct spray nozzles are symmetrically provided on the left and right sides of the spray boss. The direct spray nozzles are located between the outer wind knife nozzles. The diffusion nozzles are fan-shaped nozzles, the direct spray nozzles are connected to the dispensing needles using Luer connectors, and the wind knife nozzles are flat nozzles.

[0013] Furthermore, the marble platform is also equipped with a test coating unit, which includes a test coating tank assembly and a test coating drive roller assembly. The test coating tank assembly includes a test coating tank, and the top surface of the test coating tank is provided with a test coating tank cover plate. The front and rear ends of the test coating tank are provided with side U-plates for setting the test coating roller. Nozzle mounting components are provided on the left and right sides of the test coating tank, respectively. The nozzle mounting component on the left side is provided with a row of left fan-shaped nozzles, and the nozzle mounting component on the right side is provided with a row of right fan-shaped nozzles. A row of first scrapers is provided above the left fan-shaped nozzles.

[0014] Furthermore, a U-shaped baffle is provided on each side of the U-plate on the side of the tank, and a detachable U-shaped plate pressure bar is provided above the U-plate on the side of the tank. When it is necessary to remove the independent test coating drive roller assembly, only the U-shaped plate pressure bar needs to be removed.

[0015] Furthermore, the test coating drive roller assembly includes a test coating roller, with bearing seats connected to both ends of the test coating roller. One end of the test coating roller passes through the bearing seat and is connected to a test coating motor via a coupling. An L-shaped fixing seat is provided below the test coating motor. The test coating drive roller assembly is set independently of the test coating tank. Both ends of the test coating roller are locked inside the U-plate on the side of the test coating tank.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a high-precision flat slit coating system. The mold head of this invention adopts an air-floating design to suspend itself on a marble platform, isolating it from external vibrations and ensuring absolute accuracy in mold head translation. Mold head lifting is driven by a set of servo motors and ball screws on both the left and right sides, and a lifting cylinder is also provided to drive the mold head. The lifting cylinder provides back pressure to eliminate backlash and can fine-tune the mold head's level. These two precision mechanisms ensure absolute accuracy in mold head lifting. A high-precision laser displacement sensor is used for mold head distance control, monitoring and adjusting the distance to the platen in real time. This, combined with mold head lifting, allows for fine-tuning of the mold head height. By integrating high-precision control in three directions—air-floating translation, linear motor drive plus dual lifting cylinder, and laser probe distance adjustment—a coating thickness of 50nm can be achieved, the distance between the mold head and the platen can be 30μm, and the translation accuracy can be ≤5μm, realizing nanometer-level high-precision coating.

[0017] The frame unit of this invention includes an upper platform assembly and a lower frame assembly. The upper platform assembly is a marble platform with accordion covers at its four corners. A guide strip connects the two accordion covers, which also serve as the floating path for the air-bearing moving mold head unit. The position of the guide strip corresponds to the air-bearing area of ​​the air-bearing moving mold head unit, facilitating its levitation and translation. Furthermore, a sensing device corresponding to the sensor on the mold head moving frame assembly is installed on the bottom surface of the marble platform to monitor the movement position of the mold head. This completes the integration with the air-bearing moving mold head unit, providing a platform foundation for achieving a levitation mold head, which is beneficial for overall machine consistency and high precision. The lower frame assembly houses a PLC cabinet and a ventilation system. The PLC cabinet is connected to an intelligent control panel to control various drives, sensors, valve groups, pump groups, etc. The ventilation system connects to the exhaust pipe interface through an exhaust pipe, and then connects to the negative pressure distribution port on the bottom plate of the lower frame assembly to form an internal negative pressure system. This system provides a micro-negative pressure environment for the machine area and some solvent evaporation areas, laying the foundation for the stability of the entire machine.

[0018] The cleaning unit of this invention features an inner V-shaped groove in its cleaning tank, with a drain outlet at the lowest point of the V-shaped groove for better drainage. The spraying device is mounted on the synchronous belt of the transmission assembly via a toothed plate. A servo motor drives the drive wheel, which in turn drives the driven wheel to rotate, thus rotating the synchronous belt and causing the spraying device to perform reciprocating spraying cleaning, improving cleaning effect and efficiency. The spraying device is designed with three types of nozzles: a diffusion nozzle, a direct spray nozzle, and an air knife nozzle. The diffusion nozzle dissolves and dilutes the residual slurry, the direct spray nozzle flushes down the slurry, and the air knife nozzle finally dries the residual solvent, achieving instant cleaning and drying. This highly efficient cleaning and drying process greatly improves automated production efficiency and facilitates the mass production of the coating system of this invention.

[0019] The test coating unit of this invention features a test coating roller assembly designed independently of the test coating tank, allowing it to be directly removed from the tank. The shaft connection is quick-release, facilitating cleaning of the tank after complete removal. The test coating tank is designed with at least one imported scraper to ensure no slurry residue remains on the upper layer of the test coating roller. Multiple nozzles within the tank enable omnidirectional automatic cleaning of the test coating roller. The test coating unit eliminates uneven liquid discharge at the moment the die head exits, providing a uniform and precise die head foundation for subsequent coating, thus contributing to the high efficiency, automation, and mass production of the coating system of this invention.

[0020] The coating platform unit of this invention includes a marble adsorption stage and a coating platform base plate assembly. The marble adsorption stage features a pressure equalization channel design with four negative pressure distribution points on each side and 48 0.2mm micropores for pressure distribution, ensuring balanced adsorption force and a flatness of 6μm, providing a foundation for stable and high-precision placement of the plate. The coating platform base plate assembly includes parallel guide pillars and a coating platform base plate. It employs a three-point micrometer Y-axis lifting platform with manual horizontal fine-tuning mechanism to ensure the stability of the coating platform base plate assembly and minimize the slight displacement caused by minor vibrations after leveling and lifting the plate. The plate lifting is driven by a servo motor, guided by three precision guide pillars, and synchronously lifted at nine points, minimizing errors caused by plate lifting and facilitating nanoscale coating.

[0021] In summary, the coating system of the present invention features highly precise coordination and cooperation among its various units, achieving nanoscale high-precision and high-efficiency flat panel coating. It also greatly improves the stability and consistency of the overall machine operation, which is beneficial for the efficient automation and mass production of the coating system of the present invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 This is a side view of the present invention.

[0024] Figure 3 This is a top view of the present invention.

[0025] Figure 4 This is a cross-sectional schematic diagram of the present invention.

[0026] Figure 5 This is a schematic diagram of the frame unit of the present invention.

[0027] Figure 6 This is a front view of the frame unit of the present invention.

[0028] Figure 7 This is a side view of the frame unit of the present invention.

[0029] Figure 8 This is a schematic diagram of the structure of the upper platform framework component of the present invention.

[0030] Figure 9 This is a bottom view of the upper platform frame component of the present invention.

[0031] Figure 10 This is a side view of the upper platform frame component of the present invention.

[0032] Figure 11 This is a schematic diagram of the lower frame component of the present invention.

[0033] Figure 12 This is a top view of the lower frame component of the present invention.

[0034] Figure 13 This is a side view of the lower frame component of the present invention.

[0035] Figure 14 This is a schematic diagram of the internal structure of the lower frame assembly of the present invention.

[0036] Figure 15 This is a schematic diagram of the structure of the air-floating moving mold head unit of the present invention.

[0037] Figure 16 This is a front view of the air-floating moving mold head unit of the present invention.

[0038] Figure 17 for Figure 16 A schematic diagram of the AA cross-section.

[0039] Figure 18 for Figure 17 A schematic diagram of the BB cross-section.

[0040] Figure 19 This is a schematic diagram of the structure of the mold head moving frame assembly of the present invention.

[0041] Figure 20 This is a front view of the mold head moving frame assembly of the present invention.

[0042] Figure 21 This is a schematic diagram of the structure of the mold head lifting base assembly of the present invention.

[0043] Figure 22 This is a schematic diagram of the lifting slide assembly of the present invention.

[0044] Figure 23 This is a top view of the lifting slide assembly of the present invention.

[0045] Figure 24 for Figure 23 A schematic diagram of the CC cross-section.

[0046] Figure 25 This is a schematic diagram of the structure of the laser probe assembly of the present invention.

[0047] Figure 26 This is a side view of the laser probe assembly of the present invention.

[0048] Figure 27 This is a schematic diagram of the cleaning unit of the present invention.

[0049] Figure 28 This is a top view of the cleaning unit of the present invention.

[0050] Figure 29 for Figure 28 DD cross-sectional schematic diagram.

[0051] Figure 30 This is a schematic diagram of the cleaning tank assembly of the present invention.

[0052] Figure 31 This is a top view of the cleaning tank assembly of the present invention.

[0053] Figure 32 for Figure 31 A schematic diagram of the EE cross-section.

[0054] Figure 33 for Figure 32 A schematic diagram of the FF cross-section.

[0055] Figure 34 This is a schematic diagram of the cleaning transmission assembly of the present invention.

[0056] Figure 35 This is a top view of the cleaning transmission assembly of the present invention.

[0057] Figure 36 for Figure 35 A schematic diagram of the GG cross-section.

[0058] Figure 37 This is a schematic diagram of the cleaning spray assembly of the present invention.

[0059] Figure 38 This is a schematic diagram of the structure of the test coating unit of the present invention.

[0060] Figure 39 This is a side view of the test coating unit of the present invention.

[0061] Figure 40 This is a schematic diagram of the structure of the test coating tank assembly of the present invention.

[0062] Figure 41 This is a top view of the test coating tank assembly of the present invention.

[0063] Figure 42 for Figure 41 A schematic diagram of the HH cross-section.

[0064] Figure 43 for Figure 42 Schematic diagram of section II.

[0065] Figure 44 This is a schematic diagram of the structure of the test coating drive roller assembly of the present invention.

[0066] Figure 45 This is a top view of the test coating drive roller assembly of the present invention.

[0067] Figure 46 This is a schematic diagram of the coating platform unit of the present invention.

[0068] Figure 47 This is a front view of the coating platform unit of the present invention.

[0069] Figure 48 for Figure 47 A schematic diagram of the cross-section of JJ.

[0070] Figure 49 This is a schematic diagram of the structure of the adsorption platform component of the present invention.

[0071] Figure 50 This is a bottom view of the adsorption platform component of the present invention.

[0072] Figure 51 This is a front view of the coating platform base plate assembly of the present invention.

[0073] Figure 52 This is a top view of the coating platform base plate assembly of the present invention.

[0074] in: Frame Unit 1, Air-float Moving Die Head Unit 2, Cleaning Unit 3, Test Coating Unit 4, Coating Platform Unit 5 Components include: 1.1 Upper platform frame; 1.11 Marble platform; 1.12 First accordion cover; 1.13 Second accordion cover; 1.14 Third accordion cover; 1.15 Fourth accordion cover; 1.16 Cover baffle; 1.17 Cover guide strip; 1.18 Tabletop electrical panel; 1.19 Electrical panel cover; 1.110 Cable tray frame; 1.111 Magnetic ruler base; 1.112 Magnetic ruler; 1.113 Magnetic photoelectric stop block; 1.114 Linear motor stator; 1.115 Marble support frame. 1.2 Lower frame assembly, 1.21 Machine base, 1.22 Air outlet, 1.23 Lower exhaust pipe interface, 1.24 PLC cabinet, 1.25 Electrical cabinet door, 1.26 Support legs, 1.27 Machine base plate, 1.28 Hanging plate, 1.29 Cable adapter plate, 1.210 Gas-liquid adapter plate, 1.211 Negative pressure outlet, 1.212 Waterproof sealing strip, 1.213 Control box. 2.1 Mold head moving frame assembly, 2.11 wall panel, 2.12 U-shaped channel, 2.13 clamping cylinder seat, 2.14 lifting cylinder, 2.15 wall panel connecting plate, 2.16 air-float upper base plate, 2.17 air-float side plate, 2.18 air-float lower base plate, 2.19 lower connecting beam. 2.2 Die head lifting base assembly, 2.21 Die head lifting seat connecting plate, 2.22 Die head lifting seat side plate, 2.23 Cylinder connecting seat, 2.24 Proximity switch stop, 2.25 Quick release plate, 2.26 Die head seat connecting block, 2.27 Needle roller cam guide. 2.3 Lifting slide assembly, 2.31 Lifting slide base, 2.32 Linear guide rail, 2.33 Lifting slide upper plate, 2.34 Servo motor, 2.35 First coupling, 2.36 Ball screw. 2.4 Laser probe assembly, 2.41 Laser probe slide, 2.42 Laser probe mounting base, 2.43 Laser probe slider, 2.44 Laser probe, 2.45 Laser probe cover. 2.5 Air float block, 2.51 Spherical ejector rod, 2.6 Die head, 2.61 Pump assembly cover, 2.62 Injection pump assembly, 2.63 Moving side cover, 2.64 Tank cable chain, 2.65 Magnetic grating head, 2.66 Magnetic grating head mounting base, 2.67 Photoelectric switch, 2.7 Linear motor mover, 2.8 Stator connecting plate, 2.9 Anti-collision block, 2.10 First proximity switch. 3.1 Cleaning tank assembly, 3.11 Cleaning tank body, 3.12 Cleaning tank cover, 3.13 V-groove, 3.14 Liquid inlet, 3.15 Liquid outlet, 3.16 Overflow outlet, 3.17 Exhaust pipe interface, 3.18 Liquid level sensor, 3.19 Inductive proximity switch. 3.2 Cleaning transmission assembly, 3.21 Cleaning transmission mounting base plate, 3.22 Cleaning motor, 3.23 Drive wheel, 3.24 Synchronous belt, 3.25 Toothed clamp, 3.26 Driven wheel, 3.27 First linear bearing, 3.28 Base bracket, 3.29 Cylindrical shaft, 3.210 Cable chain, 3.211 Fixed bracket, 3.212 Cable chain mounting strip. 3.3 Cleaning spray assembly, 3.31 Spray base, 3.32 Spray mounting base, 3.33 Diffuser nozzle, 3.34 Direct spray nozzle, 3.35 Air knife nozzle, 3.36 Sealing plug. Test coating tank assembly 4.1, test coating tank body 4.11, test coating tank cover plate 4.12, test coating mounting base plate 4.13, tank side U-plate 4.14, U-shaped plate baffle 4.15, U-shaped plate pressure bar 4.16, nozzle mounting component 4.17, left fan-shaped nozzle 4.18, right fan-shaped nozzle 4.19, first scraper 4.110, second scraper 4.111, exhaust pipe connector 4.112. Test coating drive roller assembly 4.2, test coating roller 4.21, test coating motor 4.22, bearing housing 4.23, tie rod 4.24, second coupling 4.25. 5.1 Adsorption platform assembly, 5.11 Marble adsorption stage, 5.12 Adsorption stage sealing plate, 5.13 First grid seat, 5.14 Second grid seat, 5.15 Limiting post, 5.16 Calibration plate, 5.17 Reference ball seat, 5.18 Hemispherical reference block, 5.19 Displacement sensor. Coating platform base plate assembly 5.2, coating platform base plate 5.21, guide column plate 5.22, guide column 5.23, second linear bearing 5.24, support tube 5.25, lifting cylinder 5.26, cylinder limit plate 5.27, limit plate support column 5.28, micrometer precision adjustment platform 5.29, reference ball 5.210, proximity switch bracket 5.211, fiber optic sensor 5.212, sensor detection board 5.213. Detailed Implementation

[0075] To better understand the technical solution of the present invention, a detailed description will be provided below in conjunction with relevant illustrations. It should be understood that the specific embodiments described below are not intended to limit the specific implementation of the technical solution of the present invention, but are merely possible implementations of the technical solution of the present invention. It should be noted that the descriptions of the positional relationships of the components herein, such as component A being located above component B, are based on the relative positions of the components in the illustrations and are not intended to limit the actual positional relationships of the components. Example 1

[0076] See Figure 1-4 , Figure 1 The figure shows a structural schematic diagram of a high-precision flat slit coating system according to this embodiment. As shown in the figure, the high-precision flat slit coating system of this embodiment 1 includes a frame unit 1 and an air-floating moving die head unit 2. A cleaning unit 3, a test coating unit 4 and a coating platform unit 5 are sequentially arranged on the frame unit 1, and the air-floating moving die head unit 2 is suspended on the frame unit 1.

[0077] See Figure 5-14 , Figure 5The diagram shows the structural schematic of the frame unit in this embodiment. As shown, the frame unit 1 includes an upper platform frame assembly 1.1 and a lower frame assembly 1.2. The upper platform frame assembly 1.1 includes a marble platform 1.11. The four corners of the marble platform 1.11 are respectively provided with a first accordion cover 1.12, a second accordion cover 1.13, a third accordion cover 1.14, and a fourth accordion cover 1.15 for dust prevention. The first accordion cover 1.12 and the second accordion cover 1.13 are respectively located at the two front corners of the marble platform 1.11, and the third accordion cover 1.14 and the fourth accordion cover 1.15 are respectively located on the marble platform 1. At the two rear corners of 11; the outer sides of the first accordion cover 1.12 and the second accordion cover 1.13 are connected by cover baffles 1.16, and the outer sides of the third accordion cover 1.14 and the fourth accordion cover 1.15 are also connected by cover baffles 1.16; a cover guide strip 1.17 is provided between the first accordion cover 1.12 and the third accordion cover 1.14, and a cover guide strip 1.17 is also provided between the second accordion cover 1.13 and the fourth accordion cover 1.15, and the cover guide strip 1.17 is set on the side wall of the marble platform 1.11 and arranged parallel to the marble platform 1.11.

[0078] The top surface of the marble platform 1.11 is provided with a tabletop electrical panel 1.18, and the two adjacent sides of the tabletop electrical panel 1.18 are flush with the edge of the marble platform 1.11; an electrical panel cover 1.19 is provided above the tabletop electrical panel 1.18, and a cable tray 1.110 is connected to the tabletop electrical panel 1.18. The cable tray 1.110 is set on the marble platform 1.11 and is used for wiring. The bottom surface of the marble platform 1.11 is provided with two parallel magnetic grating ruler bases 1.111. A magnetic grating ruler 1.112 is provided on one magnetic grating ruler base 1.111, and a magnetic grating photoelectric block 1.113 is provided at each end of the other magnetic grating ruler base 1.111. A linear motor stator 1.114 is provided on the outside of the magnetic grating ruler base 1.111, and the linear motor stator 1.114 is fixed to the bottom surface of the marble platform 1.11.

[0079] The marble platform 1.11 is equipped with several cable routing ports; The marble platform 1.11 has a marble support frame 1.115 at the bottom of its front and rear ends.

[0080] The lower frame assembly 1.2 includes a machine base 1.21 and a base plate 1.27 mounted on the machine base 1.21. The machine base 1.21 is a cuboid box composed of multiple side electrical mounting plates. The machine base 1.21 contains an exhaust duct lower interface 1.23 and a PLC cabinet 1.24. One side wall of the machine base 1.21 has an electrical cabinet door 1.25, inside which the PLC cabinet 1.24 is located for easy maintenance. Both sides of the electrical cabinet door 1.25 have door side panels. One side wall of the machine base 1.21 has an air outlet 1.22, which is connected to the exhaust duct lower interface 1.23 via an exhaust duct. The machine base 1.21 also contains a welded frame base for connecting two opposite side plates, improving the strength and load-bearing capacity of the machine base 1.21. A hanging plate 1.28 is vertically connected to the bottom surface of the base plate 1.27. The hanging plate 1.28 is inserted into the machine base 1.21 and fits against the inner wall of the machine base 1.21, thereby fixing the base plate 1.27 above the machine base 1.21. The base plate 1.27 is provided with a cable adapter plate 1.29 and a gas-liquid adapter plate 1.210. The base plate 1.27 is provided with two negative pressure distribution ports 1.211 on the left and right sides for adjusting the vacuum environment in the system. The base plate 1.27 is provided with a waterproof rubber strip 1.212. The base plate 1.27 is provided with an outer cover box. The waterproof rubber strip 1.212 is used to seal the contact point between the outer cover box and the base plate 1.27. The PLC cabinet 1.24 is connected to a control box 1.213, which is equipped with an operation panel for setting up the circuits, gas lines, water lines and other pipelines in the system.

[0081] The marble platform 1.11 is mounted on the machine base plate 1.27 via a marble support frame 1.115 on its bottom surface.

[0082] See Figure 15-26 , Figure 15The diagram shows the structural schematic of the air-float moving mold head unit in this embodiment. As shown, the air-float moving mold head unit 2 includes a mold head moving frame assembly 2.1, a mold head lifting assembly, a laser probe assembly 2.4, and a mold head 2.6. The mold head moving frame assembly 2.1 includes two wall plates 2.11 symmetrically arranged on the left and right sides, connected by a wall plate connecting plate 2.15. The bottom end of the wall plate 2.11 is connected to one end of the air-float upper base plate 2.16, and the other end of the air-float upper base plate 2.16 is connected to the top of the air-float side plate 2.17. The bottom end of the air-float side plate 2.17 is vertically connected to the bottom air-float bottom plate 2.18, thereby forming a C-shaped groove with the air-float upper bottom plate 2.16, air-float side plate 2.17, and air-float lower bottom plate 2.18 for translation along the marble platform 1.11; each of the air-float upper bottom plate 2.16, air-float side plate 2.17, and air-float lower bottom plate 2.18 is provided with at least one through hole, through which a spherical top rod 2.51 is inserted, and the air-float block 2.5 is connected through the spherical top rod 2.51; The wall panel 2.11 is provided with an inverted U-shaped groove 2.12. Due to the gravity of the mold head moving frame assembly 2.1, the lifting intensity is very large, and there is a deviation between the left and right wall panels 2.11, which causes the frame to deform. The U-shaped groove 2.12 is provided to release the displacement of the lifting and allow the lifting deviation of the mold head moving frame assembly 2.1. The wall panel 2.11 surrounded by the U-shaped groove 2.12 is provided with a pressing cylinder seat 2.13, and a lifting cylinder 2.14 is provided on the pressing cylinder seat 2.13 via a support; A lower connecting beam 2.19 is provided between the two air-float bottom plates 2.18 on the left and right sides.

[0083] The upper surface of the lower connecting beam 2.19 has a stator connecting plate 2.8 at each of its left and right ends. A linear motor mover 2.7 is mounted on the stator connecting plate 2.8 via a mover mounting plate. The position of the linear motor mover 2.7 corresponds to and matches the position of the linear motor stator 1.114 on the bottom surface of the marble platform 1.11. Between the left and right linear motor movers 2.7, there are two magnetic grating head mounting seats 2.66. The magnetic grating head mounting seats 2.66 are equipped with a magnetic grating head 2.65 and a photoelectric switch 2.67. The position of the magnetic grating head 2.65 corresponds to the magnetic grating ruler 1.112 on the bottom surface of the marble platform 1.11, and the position of the photoelectric switch 2.67 corresponds to the magnetic grating photoelectric stop block 1.113 on the bottom surface of the marble platform 1.11. At each of the lower surfaces of the lower connecting beam 2.19, there is an anti-collision block 2.9. The anti-collision block 2.9 is fixed to the lower surface of the lower connecting beam 2.19 via a mounting seat.

[0084] The die head lifting assembly includes a die head lifting base assembly 2.2 and a lifting slide assembly 2.3. The die head lifting base assembly 2.2 includes a die head lifting seat connecting plate 2.21 and two die head lifting seat side plates 2.22. The left and right ends of the die head lifting seat connecting plate 2.21 are respectively vertically connected to one die head lifting seat side plate 2.22. A cylinder connecting seat 2.23 is provided between the two die head lifting seat side plates 2.22. The cylinder connecting seat 2.23 is provided with a proximity switch stop 2.24. The outer end of the die head lifting seat side plate 2.22 is provided with a detachable quick-release plate 2.25 for easy disassembly, maintenance and replacement. The lifting slide assembly 2.3 includes a lifting slide base 2.31. The lifting slide base 2.31 has protrusions on its left and right sides, and linear guide rails 2.32 are mounted on the protrusions. A lifting slide upper plate 2.33 is slidably mounted on the linear guide rails 2.32. A motor mount is located at one end of the lifting slide base 2.31. The motor mount is connected to a servo motor 2.34. The servo motor 2.34 is connected to a ball screw 2.36 via a first coupling 2.35. A nut seat on the ball screw 2.36 is connected to the lifting slide upper plate 2.33, thereby enabling the servo motor 2.34 to drive the lifting slide upper plate 2.33 to move vertically. The bottom surface of the wall panel connecting plate 2.15 of the mold head moving frame assembly 2.1 is connected to the mold head 2.6 through the mold head mounting plate, and the front side of the mold head 2.6 is provided with a laser probe assembly 2.4; The mold head mounting plate has a mold head lifting base assembly 2.2 on each of its left and right sides. The quick-release plate 2.25 of the mold head lifting base assembly 2.2 is connected to the end of the mold head mounting plate through a mold head seat connecting block 2.26. The mold head seat connecting block 2.26 is connected to the quick-release plate 2.25 through a needle roller cam guide 2.27. The cylinder connecting seat 2.23 of the mold head lifting base assembly 2.2 is connected to the lifting cylinder 2.14 through a cylinder floating joint. The lifting slide base 2.31 of the lifting slide assembly 2.3 is fixed to the outer wall of the wall panel 2.11 of the mold head moving frame assembly 2.1. The lifting slide upper plate 2.33 of the lifting slide assembly 2.3 is connected to the mold head lifting base connecting plate 2.21. Thus, the servo motor 2.34 drives the lifting slide upper plate 2.33 to move, thereby driving the mold head lifting base connecting plate 2.21 to rise and fall, and thus driving the mold head mounting plate and the mold head 2.6 to rise and fall. The inner wall of the wall plate 2.11 of the die head moving frame assembly 2.1 is provided with a first proximity switch 2.10. The position of the first proximity switch 2.10 is set according to the coating height of the die head. The position of the proximity switch stop 2.24 of the die head lifting base assembly 2.2 corresponds to and matches the first proximity switch 2.10. When the proximity switch stop 2.24 of the die head lifting base assembly 2.2 reaches the position of the first proximity switch 2.10, a stop drive signal is issued, causing the die head to stop coating.

[0085] The laser probe assembly 2.4 includes a laser probe carriage 2.41, with a laser probe slider 2.43 slidably mounted on each of the left and right sides of the laser probe carriage 2.41. A laser probe 2.44 is mounted on the laser probe slider 2.43 via a laser probe mounting base 2.42, and a laser probe cover 2.45 is provided on the outside of the laser probe 2.44. The laser probe carriage 2.41 is located on the front side of the mold head.

[0086] The mold head is connected to the injection pump assembly 2.62, which is mounted on the wall plate connecting plate 2.15 of the mold head moving frame assembly 2.1. The injection pump assembly 2.62 is provided with a pump group cover 2.61 on the outside, and a moving side cover 2.63 is fitted on the outside of the wall plate 2.11 to surround the lifting slide assembly 2.3. Both the pump group cover 2.61 and the moving side cover 2.63 are provided with openable door panels for maintenance and other operations. The bottom surfaces of the left and right ends of the lower connecting beam 2.19 of the air-float moving mold head unit 2 are respectively connected to a tank drag chain 2.64, i.e. a conduit, for wiring.

[0087] See Figure 27-37 , Figure 27 The diagram shows the structural schematic of the cleaning unit in this embodiment. As shown, the cleaning unit 3 includes a cleaning tank assembly 3.1, a cleaning transmission assembly 3.2, and a cleaning spray assembly 3.3. The cleaning tank assembly 3.1 includes a cleaning tank 3.11 mounted on the bottom plate of the cleaning area. The top surface of the cleaning tank 3.11 is provided with a cleaning tank cover plate 3.12. A V-shaped groove 3.13 is provided inside the cleaning tank 3.11. A drain outlet 3.15 is provided at the lowest point of the V-shaped groove 3.13, and a liquid inlet 3.14 is also provided on the V-shaped groove 3.13. The inlet 3.14 and outlet 3.15 are connected to the outside of the cleaning tank 3.11 via hoses. The V-shaped groove 3.13 is also provided with an overflow port 3.16. The side wall of the cleaning tank 3.11 is also provided with an exhaust pipe interface 3.17. An inductive proximity switch 3.19 is provided at each of the left and right ends of the bottom plate inside the cleaning tank 3.11 to detect the position of the cleaning spray assembly 3.3. A liquid level sensor 3.18 is provided below the opening of the V-shaped groove 3.13 to prevent the liquid level from being too high.

[0088] The cleaning transmission assembly 3.2 includes a cleaning transmission mounting base plate 3.21. Two parallel cylindrical shafts 3.29 are mounted on the base plate 3.21. Each cylindrical shaft 3.29 has a first linear bearing 3.27. A base bracket 3.28 is mounted at each end of the cylindrical shaft 3.29, and the shafts are fixed to the cleaning transmission mounting base plate 3.21 via the base brackets 3.28. A drive wheel 3.23 is mounted at one end of the cleaning transmission mounting base plate 3.21 via a square seat, and a driven wheel 3.26 is mounted at the other end via a square seat. The drive wheel 3.23... The driven wheel 3.26 is connected to the driven wheel 3.24 via a synchronous belt 3.24, which is equipped with toothed clamps 3.25. The shaft of the driving wheel 3.23 is connected to the cleaning motor 3.22 via a reducer. One end of one of the cylindrical shafts 3.29 is equipped with a drag chain 3.210 fixing bracket 3.211. The outer side of the cylindrical shaft 3.29 is equipped with a drag chain mounting strip 3.212, on which a drag chain 3.210 is mounted. The end of the drag chain 3.210 is connected to the synchronous belt 3.24 via a synchronous belt flat pressure plate.

[0089] The cleaning spray assembly 3.3 includes a spray base 3.31. The spray base 3.31 has I-shaped platforms at its left and right ends. Each platform has a spray mounting seat 3.32. The inner walls of the two opposing spray mounting seats 3.32 are each equipped with a diffusion nozzle 3.33, a direct spray nozzle 3.34, and an air knife nozzle 3.35. A spray boss with a right-angled trapezoidal cross-section and an inclined surface is provided in the middle of the inner wall of each spray mounting seat 3.32. Facing downwards, a diffusion nozzle 3.33 is provided on the inclined surface, and a sealing plug 3.36 is provided on the spraying protrusion; an air knife nozzle 3.35 and two direct spray nozzles 3.34 are symmetrically provided on the left and right sides of the spraying protrusion, with the direct spray nozzles 3.34 positioned between the outer air knife nozzles 3.35; the diffusion nozzle 3.33 adopts a fan-shaped nozzle, the direct spray nozzle 3.34 adopts a Luer connector to connect the dispensing needle, and the air knife nozzle 3.35 adopts a flat nozzle.

[0090] The spray base 3.31 of the cleaning spray assembly 3.3 is fixed on the toothed clamp 3.25 of the cleaning transmission assembly 3.2. The cleaning motor 3.22 drives the synchronous belt 3.24 to drive the cleaning spray assembly 3.3 on the toothed clamp 3.25 to move, so as to achieve reciprocating full cleaning and drying.

[0091] See Figures 38-45 , Figure 38The diagram shows the structural schematic of the test coating unit in this embodiment. As shown, the test coating unit 4 includes a test coating tank assembly 4.1 and a test coating drive roller assembly 4.2. The test coating tank assembly 4.1 includes a test coating tank 4.11, with a test coating tank cover plate 4.12 at the top opening. The front and rear ends of the test coating tank 4.11 are provided with side U-plates 4.14 for mounting the test coating roller 4.21. A U-shaped baffle 4.15 is provided on each side of the side U-plate 4.14. A detachable U-shaped baffle rod 4.16 is provided above the side U-plate 4.14. When the test coating drive roller assembly 4.2 needs to be removed, only the U-shaped baffle rod 4.16 needs to be removed. Nozzle mounting parts 4.17 are provided on the left and right sides of the test coating tank 4.11, respectively. A row of left fan-shaped nozzles 4.18 is provided on the side nozzle mounting bracket 4.17, and a row of right fan-shaped nozzles 4.19 is provided on the right nozzle mounting bracket 4.17. The left fan-shaped nozzles 4.18 are positioned lower than the right fan-shaped nozzles 4.19, and the right fan-shaped nozzles 4.19 are arranged at an angle downwards of 5° to 50°. A row of first scrapers 4.110 is provided above the left fan-shaped nozzles 4.18, and a row of second scrapers 4.111 is provided on the bottom surface of the test coating tank 4.11. The first scrapers 4.110 are fixed to the left nozzle mounting bracket 4.17 by scraper fixing members, and the second scrapers 4.111 are fixed to the bottom surface of the test coating tank 4.11 by scraper fixing members, and the second scrapers 4.111 are arranged at an angle upwards to the right. The test coating tank 4.11 is mounted on the test coating mounting base plate 4.13, which is mounted on a marble countertop. The test coating tank 4.11 is equipped with a water inlet and a water outlet for supplying water to the nozzles and for drainage. One end of the test coating tank 4.11 is also equipped with an exhaust pipe connector 4.112 for drawing air into the test coating tank 4.11. Since the evaporation of organic solvents in the adhesive will cause negative pressure to be generated inside the test coating tank 4.11, an exhaust pipe is connected through the exhaust pipe connector 4.112.

[0092] The test coating drive roller assembly 4.2 includes a test coating roller 4.21. Both ends of the test coating roller 4.21 are connected to bearing seats 4.23. One end of the test coating roller 4.21 passes through the bearing seat 4.23 and is connected to the test coating motor 4.22 via a second coupling 4.25. An L-shaped fixing seat is provided below the test coating motor 4.22. The test coating drive roller assembly 4.2 is set independently of the test coating tank 4.11. Both ends of the test coating roller 4.21 are locked in the side U-plate 4.14 of the test coating tank 4.11. The bearing seat 4.23 is set outside the test coating tank 4.11. The L-shaped fixing seat is set on the bottom plate below the test coating tank 4.11. The top surface of the bearing housing 4.23 is provided with a pull rod 4.24, which facilitates the removal and cleaning of the test coating drive roller assembly 4.2 from the test coating tank 4.11.

[0093] See Figures 46-52 , Figure 46 The diagram shows the structural schematic of the coating platform unit in this embodiment. As shown, the coating platform unit 5 includes an adsorption platform assembly 5.1 and a coating platform base plate assembly 5.2 arranged vertically. The coating platform base plate assembly includes a guide post plate 5.22 and a coating platform base plate 5.21 arranged parallel to each other vertically. The guide post plate 5.22 is provided with a 4×4 array of support tubes 5.25. The bottom end of the support tubes 5.25 is fixed to the guide post plate 5.22 by an elongated nut. A lifting cylinder 5.26 is provided at the center of the bottom surface of the coating platform base plate 5.21. The output end of the lifting cylinder 5.26 is connected to the center of the guide post plate 5.22. The coating platform base plate 5.21 is connected to the guide post plate 5.22 via a cylinder limiting plate 5.27. The cylinder limiting plate 5.27 is located at the center of the upper surface of the guide post plate 5.22. The cylinder limiting plate 5.27 is connected to the coating platform base plate 5.21 via a limiting plate support column 5.28 to provide support. The coating platform base plate 5.21 is provided with three evenly distributed guide posts 5.23. The guide post 5.23 is provided with a second linear bearing 5.24. The second linear bearing 5.24 is connected to the guide post plate 5.22. The lifting motor drives the linear bearing to move the guide post plate 5.22 up and down along the guide post 5.23. Three micrometer precision adjustment platforms 5.29 are evenly arranged between the coating platform base plate 5.21 and the guide column plate 5.22. Each micrometer precision adjustment platform 5.29 is equipped with a reference ball 5.210, which is positioned above the guide column plate 5.22. The three reference balls 5.210 are used to support the marble adsorption table 5.11, and the micrometer precision adjustment platforms 5.29 are used to adjust the reference balls 5.210 to achieve a stable height for the marble adsorption table 5.11. A plate to be coated is placed on top of the support tube array 5.25. A silicone pad is provided on the top surface of the support tube 5.25 to prevent damage to the plate to be coated. A fiber optic sensor 5.212 is provided at the center of the support tube 5.25 to detect whether the plate to be coated is placed on the support tube 5.25. A sensor detection plate 5.213 is also provided on the guide plate 5.22. The coating platform base plate 5.21 is also provided with a proximity switch bracket 5.211, and a second proximity switch is provided on the proximity switch bracket 5.211. The position of the second proximity switch corresponds to the initial position of the guide plate 5.22. When the coating is completed and the guide plate 5.22 is moved down, it reaches the second proximity switch and can be sensed, and then the lifting cylinder 5.26 is controlled to stop driving.

[0094] The adsorption platform assembly 5.1 includes a marble adsorption platform 5.11, which has multiple through holes, each corresponding to a support tube 5.25 for insertion. The front and rear sides of the marble adsorption platform 5.11 are provided with adsorption platform sealing plates 5.12, each with a first grid seat 5.13. A second grid seat 5.14 is located on the right side of the marble adsorption platform 5.11, with a limiting post 5.15 at its top. The top surface of the limiting post 5.15 is lower than the bottom surface of the plate to be coated, but higher than the top surface of the marble adsorption platform 5.11, thus limiting the plate to be coated without affecting the die coating process. A calibration plate 5.16 is located on the left side of the marble adsorption platform 5.11. The bottom surface of the marble adsorption platform 5.11 is provided with three reference ball seats 5.17, the positions of which correspond one-to-one with the reference ball 5.210. The reference ball seats 5.17 are provided with hemispherical reference blocks 5.18, which are more conducive to supporting the reference ball 5.210. The bottom surface of the marble adsorption platform 5.11 is also provided with a displacement sensor 5.19, the position of which corresponds to the sensor detection plate 5.213, so that the sensor detection plate 5.213 can sense the position of the marble adsorption platform 5.11. The marble adsorption platform 5.11 is equipped with 48 0.2mm micropores for pressure distribution, and features a pressure equalization flow channel design with negative pressure evenly distributed at 4 points on each side, resulting in balanced adsorption force and a flatness of 6μm.

[0095] Working principle: The air-floating blocks form an air film on the marble platform using air pressure; the air-floating blocks on the upper base plate support the air-floating moving bracket using air pressure, the air-floating blocks on the side plates generate air pressure to position the mold head moving frame assembly with the marble platform, and the air-floating blocks on the lower base plate generate air pressure to adjust the distance between the mold head moving frame assembly and the marble platform, making the translation of the air-floating moving mold head unit smoother and more precise.

[0096] The lifting slide base of the lifting slide assembly is fixed to the outer wall of the wall panel of the mold head moving frame assembly. The upper plate of the lifting slide assembly is connected to the mold head lifting seat connecting plate, thereby enabling the servo motor to drive the upper plate of the lifting slide to move, thereby driving the mold head lifting seat connecting plate to rise and fall, and thus driving the mold head mounting plate and the mold head to rise and fall. In this embodiment, a mold head lifting assembly is also provided. The output end of the lifting cylinder of the mold head lifting assembly indirectly drives the mold head mounting plate, which is used to eliminate the backlash of the lead screw driving the mold head to rise and fall in the lifting slide assembly, thereby achieving nanometer-level precision in mold head lifting and positioning.

[0097] Each side of the die head is equipped with a servo motor and ball screw drive. The cylinder provides back pressure to eliminate backlash and can finely adjust the level of the die head. The translation of the die head is controlled by three sets of air floats on each side and a precision pressure regulating valve, so that the die head unit is suspended on the marble base to isolate external vibration. Two sets of linear motors drive the translation of the coating area to achieve a translation accuracy of ≤5μm. The distance control of the die head is achieved by a laser displacement sensor. The laser probe assembly works in conjunction with the die head lifting mechanism to finely adjust the height of the die head.

[0098] The cleaning tank is made of stainless steel and has a V-shaped groove. The V-shaped groove is equipped with a drain and overflow port and a capacitive high liquid level protection sensor. The drive method is a servo motor + enclosed belt module, which drives the nozzle mechanism to reciprocate to clean the residual slurry on the mold lip. The diffusion nozzle dissolves and dilutes the residual slurry, the direct nozzle sprays the slurry down, and the air knife nozzle blows away the residual solvent. The cleaning tank is equipped with a liquid-blocking cover to prevent the cleaning liquid from splashing out of the cleaning tank.

[0099] The test coating roller of the test coating unit is chrome-plated, and at least one imported scraper is installed on the side and bottom of the test coating roller to ensure that there is no slurry residue on the upper layer of the test coating roller; the test coating roller is driven by a servo motor and has a quick-release structure for connecting the shaft head, which makes it easy to remove the whole roller and clean the tank; multiple nozzles are installed in the test coating tank, and the test coating roller is automatically cleaned in all directions.

[0100] The marble adsorption platform adopts a pressure equalization channel design, with negative pressure evenly distributed at 4 points on each side and 48 0.2mm micropores for pressure distribution, resulting in balanced adsorption force and a flatness of 6μm. It is manually adjustable via a 3-point micrometer Y-axis lifting platform, driven by a servo motor, guided by three precision guide pillars, and synchronously lifted at 9 points. The receiving position is protected by flexible material. After loading, the glass position is pneumatically controlled for correction, and the correction position is manually fine-tuned. A pneumatic displacement sensor is used to manually zero the mold lip height and the height of the glass upper surface.

[0101] The present invention adopts a bus control mode and an Ethernet PLC control system, which makes the whole machine run more smoothly and at higher speeds. The present invention uses high-precision die heads, high-precision reducers, high-precision bearings, and high-precision coating rollers to improve the speed accuracy of the coating machine and ensure the stability and consistency of the equipment during operation.

[0102] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformations or substitutions fall within the scope of protection of the present invention.

Claims

1. A high-precision flat slit coating system, characterized in that: It includes a frame unit and an air-floating moving mold head unit, the air-floating moving mold head unit being suspended on the frame unit; the frame unit includes an upper platform frame assembly and a lower frame assembly, the upper platform frame assembly including a marble platform, the marble platform being disposed on the lower frame assembly; The air-floating movable mold head unit includes a mold head moving frame assembly, a mold head lifting assembly, and a mold head. The mold head moving frame assembly includes two symmetrical wall panels connected by a wall panel connecting plate. The bottom end of each wall panel is connected to an air-floating trough, which is fitted onto the edge of the marble platform. The inner wall of the air-floating trough has at least one air-floating block. A lower connecting beam connects the two air-floating troughs. The bottom surface of the lower connecting beam is fitted with a mold head mounting plate, and the mold head is connected to the mold head lifting assembly for driving the mold head to rise and fall. The marble platform is equipped with a coating platform unit, which includes an adsorption platform assembly and a coating platform base plate assembly arranged vertically. The adsorption platform assembly includes a marble adsorption table, and the coating platform base plate assembly includes a guide column plate and a coating platform base plate arranged vertically and horizontally. The guide column plate has three evenly distributed reference spheres, on which the marble adsorption table is placed. The coating platform base plate is connected to the guide column plate through a lifting cylinder. The guide column plate has an array of support tubes. The marble adsorption table has through holes corresponding to the support tubes. The support tubes pass through the through holes of the marble adsorption table. The plate to be coated is placed on the array of support tubes. The lifting cylinder drives the guide column plate to rise and fall, and moves the plate to be coated through the support tubes.

2. The high-precision flat slit coating system according to claim 1, characterized in that: The air flotation tank includes an upper air flotation plate, an air flotation side plate, and an air flotation lower air flotation plate. One end of the upper air flotation plate is connected to the top of the air flotation side plate, and the other end of the upper air flotation plate is perpendicularly connected to the top of the air flotation side plate. The bottom end of the air flotation side plate is perpendicularly connected to the lower air flotation plate. Thus, the upper air flotation plate, the air flotation side plate, and the lower air flotation plate form a C-shaped air flotation tank for translation along the marble platform.

3. The high-precision flat slit coating system according to claim 1, characterized in that: The mold head lifting assembly includes a lifting slide assembly, which includes a lifting slide base. The lifting slide base has protrusions on its left and right sides, and linear guide rails are provided on the protrusions. A lifting slide upper plate is slidably mounted on the linear guide rails. A motor base is provided at one end of the lifting slide base, and a servo motor is connected to the motor base. The servo motor is connected to a ball screw through a coupling, and a nut seat on the ball screw is connected to the lifting slide upper plate, thereby realizing the servo motor driving the lifting slide upper plate to move up and down.

4. The high-precision flat slit coating system according to claim 3, characterized in that: The mold head lifting assembly includes a mold head lifting base assembly, which includes a mold head lifting seat connecting plate and two mold head lifting seat side plates. The left and right ends of the mold head lifting seat connecting plate are respectively vertically connected to a mold head lifting seat side plate. A cylinder connecting seat is provided between the left and right mold head lifting seat side plates. The cylinder connecting seat of the mold head lifting base assembly is connected to the lifting cylinder through a cylinder floating joint. The lifting slide base of the lifting slide assembly is fixed on the outer wall of the wall panel of the mold head moving frame assembly. The upper plate of the lifting slide assembly is connected to the mold head lifting seat connecting plate, thereby enabling the servo motor to drive the upper plate of the lifting slide to move, thereby driving the mold head lifting seat connecting plate to rise and fall, and thus driving the mold head mounting plate and the mold head to rise and fall.

5. The high-precision flat slit coating system according to claim 1, characterized in that: The marble platform is also equipped with a cleaning unit, which includes a cleaning tank assembly, a cleaning transmission assembly, and a cleaning spray assembly. The cleaning tank assembly includes a cleaning tank set on the bottom plate of the cleaning area, with a cleaning tank cover plate on the top surface of the cleaning tank and a V-shaped groove inside the cleaning tank. The cleaning transmission assembly includes a cleaning transmission mounting base plate, with a drive wheel at one end and a driven wheel at the other end. The drive wheel and the driven wheel are connected by a synchronous belt, which is equipped with toothed clamps. The drive wheel shaft is connected to a cleaning motor via a reducer.

6. The high-precision flat slit coating system according to claim 5, characterized in that: The cleaning spray assembly includes a spray base, with spray mounting seats at both ends of the spray base. The inner sidewalls of the two spray mounting seats are equipped with diffusion nozzles, direct spray nozzles, and air knife nozzles. The spray base of the cleaning spray assembly is fixed on the toothed clamping block of the cleaning transmission assembly. The cleaning motor drives the synchronous belt transmission, which moves the cleaning spray assembly on the toothed clamping block to achieve reciprocating comprehensive cleaning and drying.

7. A high-precision flat slit coating system according to claim 6, characterized in that: The spray mounting base has a spray boss in the middle of its inner wall. The spray boss has a right trapezoidal cross-section with the inclined surface facing downwards. A diffusion nozzle is provided on the inclined surface. A sealing plug is provided on the spray boss. A wind knife nozzle and two direct spray nozzles are symmetrically provided on the left and right sides of the spray boss. The direct spray nozzles are located between the outer wind knife nozzles. The diffusion nozzles are fan-shaped nozzles. The direct spray nozzles are connected to the dispensing needles using Luer connectors. The wind knife nozzles are flat nozzles.

8. The high-precision flat slit coating system according to claim 1, characterized in that: The marble platform is also equipped with a test coating unit, which includes a test coating tank assembly and a test coating drive roller assembly. The test coating tank assembly includes a test coating tank, and the top surface of the test coating tank is equipped with a test coating tank cover plate. The front and rear ends of the test coating tank are equipped with side U-plates for setting the test coating roller. Nozzle mounting components are respectively provided on the left and right sides of the test coating tank. The nozzle mounting component on the left side is equipped with a row of left fan-shaped nozzles, and the nozzle mounting component on the right side is equipped with a row of right fan-shaped nozzles. A row of first scrapers is provided above the left fan-shaped nozzles.

9. A high-precision flat slit coating system according to claim 8, characterized in that: A U-shaped baffle is provided on each side of the U-plate on the side of the tank. A detachable U-shaped pressure bar is provided above the U-plate on the side of the tank. When it is necessary to remove the independent test coating drive roller assembly, only the U-shaped pressure bar needs to be removed.

10. A high-precision flat slit coating system according to claim 8, characterized in that: The test coating drive roller assembly includes a test coating roller, with bearing seats connected to both ends of the test coating roller. One end of the test coating roller passes through the bearing seat and is connected to a test coating motor via a coupling. An L-shaped fixing seat is provided below the test coating motor. The test coating drive roller assembly is set independently of the test coating tank. Both ends of the test coating roller are locked in the U-plate on the side of the test coating tank.

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