Micrometer precise coating die head

Abstract

The invention relates to the technical field of coating, in particular to a micrometer precise coating die head which comprises an upper die, a middle die and a lower die, the upper die and the lower die are arranged at the upper end and the lower end of the middle die respectively, and discharging seams communicated with the outside are correspondingly formed between the upper die and the middle die and between the lower die and the middle die. A plurality of micrometer adjusting assemblies are sequentially arranged in the discharging seam, the micrometer adjusting assemblies are sequentially arranged in the lengthwise extending direction of the discharging seam, and each micrometer adjusting assembly comprises a flow blocking block and a micrometer screw. The upper layer and the lower layer of the double-layer micrometer precise coating die head achieve precise control over the coating thickness through the micrometer structures. Due to the connection of the flow choking block and the micrometer screw rod, the lifting movement of the flow choking block can be accurately adjusted, so that the coating thickness can be finely adjusted. The design not only improves the coating precision, but also ensures the consistency and uniformity of coating due to the optimal design of the flow choking surface at the bottom of the flow choking block.

Description

Technical Field

[0001] The invention relates to the technical field of coating, in particular to a micrometer precision coating die head. Background Art

[0002] At present, lithium batteries are developing rapidly in the new energy industry, from the initial mobile phone lithium batteries to the current new energy vehicle power batteries, and power batteries are mostly manufactured using the slit extrusion method. As a precision wet coating technology, slit extrusion coating works on the principle that the coating slurry is extruded and sprayed along the gap of the coating mold under a certain pressure and a certain flow rate and transferred to the substrate. Slit extrusion coating has fast speed, high precision, uniform wet thickness, and a closed coating system that can prevent pollutants from entering during the coating process. The slurry utilization rate is high, the slurry properties can be kept stable, and it can adapt to different slurry viscosities and solid content ranges. Compared with other coating processes, it has stronger practicality.

[0003] At present, the existing slot extrusion coating die heads generally adopt micrometer adjustment die heads with higher adjustment accuracy and quantifiable adjustment, gradually replacing the screw adjustment die heads, which improves the consistency and uniformity of coating. However, the traditional double-layer die heads still mainly adopt the layout mode of upper micrometer adjustment components and lower push-pull rod adjustment components (such as Figure 1 As shown in the figure, the adjustment accuracy of the lower layer is low and the adjustment amount cannot be quantified. Summary of the invention

[0004] The present invention provides a micrometer precision coating die head to solve the problems mentioned in the above background technology.

[0005] The object of the present invention is achieved in the following ways:

[0006] A micrometer precision coating die head comprises an upper die, a middle die and a lower die, wherein the upper die and the lower die are respectively arranged at the upper and lower ends of the middle die, and discharge slots connected to the outside are correspondingly arranged between the upper die and the middle die and between the lower die and the middle die, and a plurality of micrometer adjustment components are sequentially arranged in the discharge slot, and the plurality of micrometer adjustment components are sequentially arranged along the longitudinal extension direction of the discharge slot, and the micrometer adjustment component comprises a baffle block and a micrometer screw, and a positioning groove for accommodating the baffle block is arranged in the discharge slot, and the micrometer screw is connected to the baffle block through a coupling, and the baffle block can be driven to move up and down along the positioning groove by rotating the micrometer screw, and a baffle surface flush with the extension direction of the discharge slot is arranged on one side of the baffle block.

[0007] Furthermore, the baffle block is provided with a connecting shaft for connecting with the coupling, and the connecting shaft is sequentially sleeved with a plurality of sealing rings from top to bottom.

[0008] Furthermore, the baffle blocks are tightly embedded in the positioning grooves, and two adjacent baffle blocks are tightly fitted to each other, so that the positioning grooves are sealed.

[0009] Furthermore, the discharge slot is provided with a first slow flow cavity and a second slow flow cavity in sequence from outside to inside, and the volume of the second slow flow cavity is greater than that of the first slow flow cavity.

[0010] Furthermore, molding gaskets are correspondingly arranged between the upper mold and the middle mold, and between the lower mold and the middle mold.

[0011] Furthermore, a lip for connecting with the outside is installed on the outside of the discharge slot.

[0012] Furthermore, the upper mold, middle mold, lower mold and lip are all made of ceramic or glass materials.

[0013] Beneficial effects of the present invention:

[0014] By adopting the above-mentioned double-layer micrometer layout structure, the double-layer micrometer precision coating die head of the present invention can achieve accurate control of coating thickness. Due to the connection between the baffle block and the micrometer screw, the lifting and lowering movement of the baffle block can be adjusted very accurately, thereby achieving fine adjustment of the coating thickness. This design not only improves the coating accuracy, but also ensures the sealing during the coating process due to the tight fit of the baffle block, effectively preventing slurry leakage.

[0015] In addition, by providing the first slow flow chamber and the second slow flow chamber, the coating die head of the present invention can perform slow flow treatment on the slurry, which helps to reduce bubbles and streaks during the coating process and improve the coating quality. The volume of the second slow flow chamber is larger than that of the first slow flow chamber, which can further optimize the flow characteristics of the slurry and ensure the smoothness and uniformity of the coating process.

[0016] The setting of the forming gaskets further enhances the stability and durability of the die. They can protect the die from wear and tear, extend the service life of the die, and when the die is replaced or repaired, the forming gaskets can be replaced separately, reducing maintenance costs.

[0017] The die head and lip made of ceramic or glass materials not only improve the overall corrosion resistance, but also reduce the damage to the coating substrate due to the high hardness and low friction coefficient of these materials, ensuring the coating quality, while also reducing the mixing of metal particles caused by wear.

[0018] In summary, the double-layer micrometer precision coating die head of the present invention has the following beneficial effects: improving coating accuracy and uniformity, enhancing the sealing and durability of the die head, and reducing maintenance costs and the risk of damage to the substrate. These improvements significantly improve the efficiency of the coating process and product quality, and have important application value for the new energy industry, especially the lithium battery manufacturing field. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of a double-layer coating die in the prior art;

[0020] Figure 2 A cross-sectional view of a micrometer precision coating die head of the present invention;

[0021] Figure 3 for Figure 2 A is an enlarged schematic diagram;

[0022] Figure 4 It is a first partial cross-sectional view of the circulation module in the second embodiment;

[0023] Figure 5 is a second partial cross-sectional view of the circulation module in the second embodiment;

[0024] Figure 6 is a cross-sectional view of an L-shaped tube in the present invention;

[0025] Figure 7 This is a first use schematic diagram of the circulation module in Example 3;

[0026] Figure 8 This is a second schematic diagram of the use of the circulation module in Example 3;

[0027] Fig. 9 It is a partial cross-sectional view of the circulation module in the third embodiment;

[0028] Fig.10 for Fig. 9 A magnified schematic diagram of B;

[0029] Fig.11 is a cross-sectional view of the circulation module in Example 3;

[0030] The reference numerals in the figure are: 1-coating die head, 101-upper die, 102-middle die, 103-lower die, 104-discharge slit, 105-lip, 106-micrometer adjustment assembly, 1061-micrometer screw, 1062-blocking block, 1063-coupling, 1604-blocking surface, 1605-connecting shaft, 1606-sealing ring, 107-first slow flow cavity, 108-second slow flow cavity, 109-positioning groove, 110-push-pull rod adjustment assembly;

[0031] 2-circulation module, 201-circulation bin, 2011-bottom trough, 2012-protection cover, 2013-inlet, 2014-hinge structure, 202-output pipe, 203-nozzle, 204-lifting mechanism, 205-elastic sealing pad, 206-roller, 207-drive motor, 208-scraper, 209-heater, 210-L-shaped pipe, 211-drain interface, 212-solenoid valve, 213-partition, 214-dividing plate. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Embodiment 1:

[0034] In this embodiment, refer to Figure 1 - Figure 3 A micrometer precision coating die head specifically implemented therein comprises an upper die 101, a middle die 102 and a lower die 103, wherein the upper die 101 and the lower die 103 are respectively arranged at the upper and lower ends of the middle die 102, and a discharge slot 104 communicating with the outside is correspondingly arranged between the upper die 101 and the middle die 102 and between the lower die 103 and the middle die 102, wherein a plurality of micrometer adjustment components 106 are sequentially arranged in the discharge slot 104, and the plurality of micrometer adjustment components 106 are sequentially arranged along the longitudinal extension direction of the discharge slot 104, The micrometer adjustment assembly 106 includes a baffle block 1062 and a micrometer screw 1061. A positioning groove 109 for accommodating the baffle block 1062 is provided in the discharge slot 104. The micrometer screw 1061 is connected to the baffle block 1062 via a coupling 1063. The baffle block 1062 can be driven to move up and down along the positioning groove 109 by rotating the micrometer screw 1061. A baffle surface 1604 flush with the extension direction of the discharge slot 104 is provided on one side of the baffle block 1062.

[0035] The upper and lower layers of the double-layer micrometer precision coating die head 1 of the present invention both realize precise control of coating thickness through the micrometer structure. Due to the connection between the baffle block 1062 and the micrometer screw 1061, the lifting and lowering movement of the baffle block 1062 can be adjusted very accurately, thereby achieving fine adjustment of the coating thickness. This design not only improves the coating accuracy, but also ensures the consistency and uniformity of the coating due to the optimized design of the baffle surface 1604 at the bottom of the baffle block 1062.

[0036] Furthermore, the baffle block 1062 is provided with a connecting shaft 1605 for connecting with the coupling 1063, and the connecting shaft 1605 is fixedly connected to the coupling 1063. When the micrometer screw 1061 is rotated, the micrometer screw 1061 can drive the connecting shaft 1605 and the baffle block 1062 to move up and down through the coupling 1063 to control the control accuracy of the baffle block 1062. The connecting shaft 1605 is sequentially sleeved with multiple sealing rings 1606 from top to bottom, which can improve the sealing of the die cavity and avoid slurry leakage.

[0037] Furthermore, the baffle block 1062 is tightly fitted in the positioning groove 109, and the two adjacent baffle blocks 1062 are tightly fitted to each other, so that the positioning groove 109 is sealed. The tight fit between the baffle block 1062 and the positioning groove 109 ensures the sealing during the coating process and effectively prevents the leakage of slurry. In this embodiment, in order to ensure the service life of the coating die 1, the baffle block 1062 adopts high-precision fine grinding to ensure the size and assembly accuracy (the gap between two adjacent baffle blocks 1062 does not exceed 0.5um), so that the baffle block 1062 can be seamlessly installed in the positioning groove 109, thereby avoiding the accumulation of slurry in the gap of the baffle block 1062, and reducing the probability of slurry dark marks on the coating die 1.

[0038] In order to further optimize the discharge process, a second slow flow chamber 108 and a first slow flow chamber 107, one large and one small, are sequentially arranged in the discharge slot 104. This structure can slow down the flow rate of the slurry and reduce the impact force on the die head. This design not only improves the smoothness of the discharge, but also helps to extend the service life of the die head. In addition, the slow flow treatment of the slurry by the first slow flow chamber 107 and the second slow flow chamber 108 helps to reduce bubbles and streaks during the coating process and improve the coating quality. The volume of the second slow flow chamber 108 is larger than that of the first slow flow chamber 107, which can further optimize the flow characteristics of the slurry and ensure the smoothness and uniformity of the coating process.

[0039] In addition, in order to adapt to slurries of different viscosities, the width of the discharge slot 104 can be adjusted according to actual needs. By adjusting the width of the discharge slot 104, the flow rate of the slurry can be effectively controlled to ensure the uniformity and consistency of the coating process. This design makes the coating equipment more flexible and can meet a variety of production needs.

[0040] In practical applications, in order to ensure smooth discharge process, the second slow flow chamber 108 and the first slow flow chamber 107 are usually set to be semicircular. The semicircular shape can effectively prevent the slurry from being retained in the corner for a long time, improve the circulation efficiency of the slurry in the slow flow chamber, reduce the probability of the slurry adhering to the chamber wall, reduce maintenance costs, and improve production efficiency. At the same time, the wear resistance of the coating also ensures the long-term stable operation of the equipment.

[0041] Furthermore, molding gaskets are correspondingly arranged between the upper mold 101 and the middle mold 102, and between the lower mold 103 and the middle mold 102. A discharge port is arranged on the molding gasket. The width of the product size determines the width of the discharge port. Therefore, different products can be produced by replacing different molding gaskets, thereby reducing the mold opening cost. In addition, the molding gasket can protect the die head from wear and tear, thereby extending the service life of the die head. When replacing or repairing the die head, the molding gasket can be replaced separately, thereby reducing maintenance costs.

[0042] Furthermore, the discharge slot 104 is externally fitted with a lip 105 for connection with the outside. In the prior art, the coating die 1 and the lip 105 are generally made of metal materials (for example, the model with excellent corrosion resistance is sus630 or 316l stainless steel). In this embodiment, in order to improve the overall service life of the coating die 1, the upper die 101, the middle die 102, the lower die 103 and the lip 105 are replaced with ceramic or glass materials. The excellent wear resistance, chemical inertness and weak conductivity of the ceramic material are used to improve the service life of the coating die 1. Compared with the die made of metal, the service life is increased by more than 3 times, and the generation of metal particles can be significantly reduced, thereby avoiding affecting the safety performance of the subsequent battery.

[0043] Embodiment 2:

[0044] like Figure 4-5 As shown, a micrometer precision coating die head specifically implemented in this embodiment also includes a circulation module 2 arranged on one side of the lip 105.

[0045] The circulation module 2 includes a circulation chamber 201 and a cleaning component. An inlet 2013 for connecting to the coating die head 1 is provided on one side of the circulation chamber 201. The bottom of the circulation chamber 201 is connected to the outside through a liquid pump (not shown). The cleaning component includes an output pipe 202 and a plurality of nozzles 203. The plurality of nozzles 203 are linearly arranged along the longitudinal extension direction of the output pipe 202. The output port of the nozzle 203 is located at the upper end of the circulation chamber 201. One end of the output pipe 202 is connected to a water inlet and an air nozzle.

[0046] In this embodiment, the water inlet is connected to an external water supply mechanism, which includes a liquid storage tank for storing cleaning solvent (surfactant, pure water, etc.) and a water pump for conveying liquid. When the circulation chamber 201 is cleaning, the cleaning solvent in the liquid storage tank is pumped to the output pipe 202 by the water pump, and the cleaning solvent is evenly sprayed by multiple nozzles 203, so that the circulation chamber 201 can be cleaned.

[0047] Furthermore, the air nozzle is connected to an external air source (air compressor). When the circulation bin 201 completes the above cleaning operation, the air nozzle can dry the circulation bin 201 through high-pressure air input from the external air source, thereby completing all cleaning steps. Furthermore, in order to reduce the moisture in the air, the air input from the air source needs to be filtered by a liquid-gas separator, thereby ensuring the drying efficiency of the circulation bin 201.

[0048] In this embodiment, the circulation bin 201 completes the lifting action through the lifting mechanisms 204 set at both ends. When the coating die head 1 is in normal coating operation, the circulation bin 201 needs to be moved to the bottom of the coating die head 1 to avoid affecting the normal coating operation of the coating die head 1. The lifting mechanism 204 is used to drive the circulation bin 201 to complete the lifting action. In this embodiment, the lifting mechanism 204 is an electric screw slide rail, and the circulation bin 201 is installed on the slider of the electric screw slide rail through a bracket, so that the circulation bin 201 is driven by the electric screw slide rail to move up and down.

[0049] In this embodiment, an elastic sealing pad 205 is provided on the outer edge of the inlet 2013. During the circulation of the slurry, the elastic sealing ring 1606 attached to the upper and lower ends of the lip 105 can effectively prevent air from entering the circulation chamber 201, reduce the influence of air on the slurry, and thus maintain the viscosity of the slurry.

[0050] In this embodiment, the two discharge slots 104 of the double-layer micrometer precision coating die head 1 can output two different slurries respectively. Therefore, the circulation chamber 201 in this embodiment is separated into two cavities by a partition 213 inside, and the two cavities are connected to the corresponding L-shaped tube 210 through the openings below them, and a rotatable dividing plate 214 is connected to the upper end of the partition 213, one end of the dividing plate 214 abuts against the upper end of the partition 213, and the other end of the dividing plate 214 is used to abut between the two discharge slots 104, so that the slurries output from the two discharge slots 104 can be circulated from the above two cavities to the corresponding slurry barrels outside, so as to avoid mixing two different slurries.

[0051] After the cycle is completed, the cleaning solvent and dry air from the nozzle 203 can be guided to the corresponding two cavities through the rotating dividing plate 214, so that the circulation chamber 201 can be properly cleaned to avoid affecting the subsequent circulation operation. Soft gaskets are provided at both ends of the dividing plate 214 to avoid scratches on the coating die 1 when connecting the lip 105.

[0052] Furthermore, a heater 209 is provided at the bottom of the circulation bin 201, and the heater 209 is composed of an electric heating wire and a ceramic layer wrapped around the outside of the electric heating wire. When the circulation bin 201 receives the slurry, the slurry will pass through the heater 209 at the bottom of the circulation bin 201, thereby heat-insulating and heating the slurry through the heat generated by the electric heating wire of the heater 209, preventing it from cooling and solidifying, thereby ensuring the fluidity and reusability of the slurry. This design not only extends the service life of the slurry, but also reduces the risk of equipment blockage caused by the drying of the slurry.

[0053] In the process of the coating die head 1 in this embodiment circulating the slurry through the circulation module 2, the viscosity of the slurry will still be affected to a certain extent. Therefore, after the slurry circulates through the circulation module 2, a viscosity instrument is required to perform viscosity detection on the slurry in the slurry barrel to avoid unqualified slurry from being put into production. The viscosity instrument is preferably a viscosity tester commonly used on the market.

[0054] Measuring principle of the viscosity tester:

[0055] 1. Use a pump to suck the slurry out of the slurry barrel and send it to the online viscosity instrument through a pipeline for measurement;

[0056] 2. After the viscosity instrument measures, the signal is processed and directly displayed or sent to the PLC (programmable logic controller);

[0057] 3.PLC compares the viscosity signal with the preset viscosity value. If the viscosity value is lower than or higher than the set value, it will automatically adjust, such as adding solvent to reduce viscosity or stopping adding solvent to maintain viscosity.

[0058] In this embodiment, the circulation bin 201 includes a bottom trough 2011 and a protective cover 2012. The protective cover 2012 is connected to the bottom trough 2011 via a hinge structure 2014. A downward inclined guide portion is provided at the bottom of the bottom trough 2011. The detachable protective cover 2012 is connected to the bottom trough 2011 via the hinge structure 2014, which is not only convenient for daily cleaning and maintenance, but also can be quickly opened when necessary to check or replace internal components, thereby improving the maintainability and flexibility of the equipment. In addition, the downward inclined guide portion can facilitate the concentration of the slurry at the bottom of the circulation bin 201.

[0059] like Figure 6 As shown, the bottom of the circulation bin 201 adopts an L-shaped tube 210 design, which cleverly avoids the pipe blockage problem that may be caused by direct connection, and a sewage discharge interface 211 is provided in the middle of the L-shaped tube 210 to facilitate the discharge of sewage generated during the cleaning process. After each circulation operation is completed, the circulation bin 201 in this embodiment needs to clean the impurities and sediments accumulated in the circulation system to ensure that the circulation system is unobstructed.

[0060] A solenoid valve 212 is provided between the L-shaped tube 210 and the liquid pump. When the circulation chamber 201 is being cleaned, the solenoid valve 212 is closed, and the L-shaped tube 210 is disconnected from the liquid pump. The L-shaped tube 210 is tilted at an angle of 15 degrees. The tilted L-shaped tube 210 can guide the residual slurry to concentrate at the sewage outlet to prevent the residual slurry from accumulating at the solenoid valve 212. At the same time, the L-shaped tube 210 is arranged at a slight tilt of 15 degrees, which will not affect the extraction and transportation operation of the liquid pump.

[0061] The present invention adds a circulation module 2 outside the coating die 1, so that when the coating operation is suspended or interrupted, the circulation module 2 can be connected with the lip 105 of the coating die 1, so that the coating die 1 can continuously output slurry to the circulation bin 201, effectively avoiding the slurry from being deposited and dried inside the coating die 1 and at the slit of the lip 105, and in the process of conveying the slurry by the coating die 1, the slurry received in the circulation bin 201 is conveyed back to the slurry barrel by a liquid pump, thereby realizing the circulation operation of the slurry, effectively reducing the waste of slurry, and avoiding the problems of slurry deposition and drying.

[0062] When the coating operation resumes normal operation, the circulation module 2 exits the operating range of the coating die head 1, and the circulation module 2 simultaneously transports all the slurry in the circulation bin 201 back to the slurry barrel. At that time, cleaning solvent and drying gas are sequentially introduced into the circulation bin 201 by multiple nozzles 203 to clean and air-dry the circulation bin 201, thereby preventing the residual slurry in the circulation bin 201 from drying up and affecting subsequent circulation operations, thereby improving the stability of the slurry circulation operation.

[0063] For the coating die 1, the innovation of the present invention is that the circulation module 2 is directly integrated into one side of the lip 105, so as to realize the instant circulation and heat preservation of the slurry during the coating process. When the coating operation is suspended, the circulation module 2 can be quickly started, and the slurry in the circulation chamber 201 can be pumped into the die through a liquid pump, so as to maintain the continuous flow of the slurry and the temperature stability, and effectively prevent the drying of the slurry at the slit of the lip 105. At the same time, the multiple high-precision micrometer adjustment components 106 arranged inside the coating die 1 allow the user to adjust the width of the discharge slit 104 according to actual needs, so as to accurately adjust the coating thickness, so as to adapt to the coating requirements of different slurry viscosities and solid contents, and improve the accuracy and flexibility of the coating operation.

[0064] Embodiment three:

[0065] like Figure 7-9 As shown, the circulation module 2 of this embodiment is applied to a single-layer coating die 1, which consists of only an upper die 101 and a lower die 103, and has only one discharge slot 104. This type of single-layer coating die 1 usually outputs only one slurry, so the circulation bin 201 does not need to classify the slurry.

[0066] like Figure 10-11 As shown, the roller 206 for engaging the lip 105 is directly installed in the circulation bin 201 of this embodiment, and the roller 206 is rotatably installed in the circulation bin 201. A driving motor 207 for driving the roller 206 is provided at one end of the circulation bin 201. A scraper 208 abutting against the bottom of the roller 206 is provided in the circulation bin 201, and the scraper 208 is obliquely arranged at the lower end of the roller 206. The slurry input by the coating die head 1 enters the circulation bin 201 through the rotatable roller 206. The rotating roller 206 correctly guides the input slurry into the circulation bin 201, avoiding the slurry splashing when the slurry is put into the circulation bin 201, and significantly improving the cleanliness of the lip 105.

[0067] In the process of the coating die head 1 outputting the slurry to the roller 206, the coating die head 1 will coat a layer of slurry film on the surface of the rotating roller 206 to simulate the normal coating operation of the coating die head 1, and when the roller 206 rotates to the bottom, the scraper 208 scrapes the slurry on the roller 206, so that the slurry circulates to the bottom of the circulation bin 201, thereby completing the collection of the slurry and avoiding the slurry from splashing in the circulation bin 201. The slurry collected in the circulation bin 201 is circulated to the slurry barrel through the liquid pump at the bottom of the circulation bin 201, thereby completing the slurry circulation.

[0068] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A micrometer precision coating die head, comprising an upper die (101), a middle die (102) and a lower die (103), wherein the upper die (101) and the lower die (103) are respectively arranged at the upper and lower ends of the middle die (102), and a discharge slot (104) which is in communication with the outside is correspondingly arranged between the upper die (101) and the middle die (102) and between the lower die (103) and the middle die (102), characterized in that: A plurality of micrometer adjustment assemblies (106) are sequentially arranged in the discharge slot (104); the plurality of micrometer adjustment assemblies (106) are sequentially arranged along the longitudinal extension direction of the discharge slot (104); the micrometer adjustment assembly (106) comprises a flow block (1062) and a micrometer screw (1061); a positioning groove (109) for accommodating the flow block (1062) is arranged in the discharge slot (104); the micrometer screw (1061) is connected to the flow block (1062) via a coupling (1063); the flow block (1062) can be driven to move up and down along the positioning groove (109) by rotating the micrometer screw (1061); and a flow block surface (1604) flush with the extension direction of the discharge slot (104) is arranged on one side of the flow block (1062).

2. A micrometer precision coating die head according to claim 1, characterized in that: The baffle block (1062) is provided with a connecting shaft (1605) for connecting with the coupling (1063), and the connecting shaft (1605) is sequentially sleeved with a plurality of sealing rings (1606) from top to bottom.

3. A micrometer precision coating die head according to claim 1 or 2, characterized in that: The baffle blocks (1062) are tightly embedded in the positioning groove (109), and two adjacent baffle blocks (1062) are tightly fitted to each other, so that the positioning groove (109) is sealed.

4. A micrometer precision coating die head according to claim 1, characterized in that: The discharge slot (104) is provided with a first slow flow chamber (107) and a second slow flow chamber (108) in sequence from the outside to the inside, and the volume of the second slow flow chamber (108) is greater than the volume of the first slow flow chamber (107).

5. A micrometer precision coating die head according to claim 4, characterized in that: Forming gaskets are correspondingly arranged between the upper mold (101) and the middle mold (102), and between the lower mold (103) and the middle mold (102).

6. A micrometer precision coating die head according to claim 1, characterized in that: The discharge slot (104) is externally mounted with a lip (105) for connection with the outside.

7. A micrometer precision coating die head according to claim 6, characterized in that: The upper mold (101), the middle mold (102), the lower mold (103) and the lip (105) are all made of ceramic or glass materials.

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