A slot coating die with uniform liquid flow rate

Abstract

The present invention relates to the field of coating technology, and discloses a slit-type coating die with uniform liquid flow rate, comprising a die body, wherein a side wall of the die body is connected to a plurality of shunt tubes. The present invention, by arranging a splint for use in conjunction with a first spring, etc., the first spring can push the splint to move, so that the splint clamps the shunt tube. At this time, when the liquid is transported into the catheter through the infusion tube, the liquid cannot pass through the shunt tube and enter the die body. After continuing to transport the liquid, the liquid will first fill the catheter. When the liquid fills the catheter, the air in the catheter can enter the gas storage tube to store the gas in the catheter. After the pressure in the catheter reaches a certain level, the splint will be pressed open, so that the liquid is discharged into the die body through the shunt tube at the same time, so as to ensure the stability of the liquid entering the die body. In this way, the shunt tube close to the infusion tube will not enter the liquid first, which will cause the problem of uneven liquid inflow and discharge from the die body.

Description

Technical Field

[0001] The invention relates to the technical field of coating, in particular to a slit-type coating die head with uniform liquid flow rate. Background Art

[0002] The working principle of the slot coating die is to squeeze and spray the coating liquid along the gap of the coating die under a certain pressure and a certain flow rate, so that the coating liquid is evenly coated on the surface of the coated object. Compared with other coating methods, slot coating has the advantages of fast coating speed and high precision; the coating system is closed, which can prevent pollutants from entering during the coating process; the coating liquid utilization rate is high and the properties of the coating liquid can be kept stable, which makes slot coating have strong adaptability.

[0003] A slot coating die disclosed in authorization publication number CN118417124A includes: a die assembly comprising a first die, a gasket, and a second die, with the die assembly's length as the X-axis, height as the Y-axis, and thickness as the Z-axis, with the gasket sandwiched between the first and second dies along the Z-axis; two sets of electrode structures disposed between the first and second dies, one at each end of the gasket; and an infusion assembly with multiple liquid inlet holes formed on the side of the first die, connected to the infusion holes. This solves the technical problems of uneven liquid flow at the slit lip and poor coating results due to the die's large thickness and weight.

[0004] The above-mentioned simultaneous provision of multiple liquid inlet holes can allow the coating to enter the slit coating die evenly, and then when the slit coating die squeezes the coating, the coating can be squeezed out more evenly. However, during use, the liquid will first pass through the liquid inlet hole close to the infusion tube, and the liquid close to it will first enter and discharge the die and be discharged, so that at the beginning, there may be a problem of uneven liquid discharge.

[0005] To this end, we propose a slot-type coating die with uniform liquid flow rate to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art and to propose a slit coating die head with uniform liquid flow rate.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A slit coating die with uniform liquid flow rate comprises a die body, a side wall of one side of the die body is connected to a plurality of diversion tubes, an upper surface of the die body is fixedly connected to a catheter, and an end of the diversion tube away from the die body is connected to the catheter, a side wall of one side of the catheter is connected to an infusion tube, and a side wall of the other side of the catheter is connected to a three-way tube, one end of the three-way tube is connected to a pressure stabilizing adjustment component, and the other end of the three-way tube is connected to an air storage tube, the diversion tube is a hose, and a splint is provided on one side of the diversion tube, and a limiting rod is provided on one side of the splint, one end of the limiting rod passes through the splint and is fixedly connected to the die body, and the other end of the limiting rod is threadedly connected to a nut, the outer wall of the limiting rod is sleeved with a first spring, and one end of the first spring is against the splint.

[0009] Preferably, the pressure stabilizing and regulating assembly includes a sleeve connected to the three-way pipe, and the sleeve is fixedly connected to the die body, the inner wall of the sleeve is slidably connected to the first piston, and one side wall of the first piston is fixedly connected to the second spring, and one end of the second spring is fixedly connected to the pressure stabilizing control component.

[0010] The cam is secured to the outside of the gear train with a spring that is fixedly secured to the second gear train, and the cam is secured to the outside of the gear train with a spring that is fixedly secured to the second gear train.

[0011] Preferably, the adjustable rack includes a cannula fixedly connected to the second magnet, and the inner wall of the cannula is slidably connected to an insertion strip, one side wall of the insertion strip is fixedly connected to a plurality of teeth, the outer wall of the cannula is threadedly connected to a bolt, and one end of the bolt passes through the cannula and abuts against the insertion strip.

[0012] Preferably, one side wall of the die body is fixedly connected to a limiting column, and the limiting column passes through the clamping plate, the limiting column is slidably connected to the clamping plate, a cavity is opened inside the limiting column, and a spring sheet is provided in the cavity, both ends of the spring sheet are fixedly connected to connecting blocks, and one side wall of the connecting block is respectively fixedly connected to an oblique block and a pressure block, and the oblique block and the pressure block both pass through the limiting column.

[0013] Preferably, a gasket is rotatably connected to one side wall of the nut, and one side wall of the gasket abuts against the first spring.

[0014] Preferably, the force for compressing the second spring is smaller than the force for compressing the first spring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention sets a splint for use in conjunction with a first spring, etc. The first spring can push the splint to move so that the splint clamps the shunt tube. At this time, when the liquid is transported into the catheter through the infusion tube, the liquid cannot pass through the shunt tube and enter the die body. After continuing to transport the liquid, the liquid will first fill the catheter. When the liquid fills the catheter, the air in the catheter can enter the gas storage tube to store the gas in the catheter. After the pressure in the catheter reaches a certain level, the splint will be pressed open to allow the liquid to be discharged into the die body through the shunt tube at the same time, so as to ensure the stability of the liquid entering the die body. In this way, the shunt tube close to the infusion tube will not enter the liquid first, which will cause uneven liquid inflow and discharge from the die body.

[0017] 2. The present invention cooperates with a sleeve, a first piston and a second spring, etc. When the infusion tube is infused, if the infusion tube is unstable and the infusion speed is too fast, the pressure in the catheter will increase, and the increased pressure will press the first piston. When the first piston moves, the liquid in the catheter will enter the sleeve through the three-way pipe to relieve the pressure in the catheter, thereby stabilizing the pressure in the catheter. Stabilizing the pressure in the catheter can stabilize the speed at which the liquid enters the die body through the shunt pipe, thereby stabilizing the discharge speed of the die body, and further avoiding the problem of uneven discharge of the die body.

[0018] 3. The present invention is used in conjunction with a threaded rod and a threaded sleeve, etc. When the first piston moves, the moving first piston will drive the second magnet to move through the first magnet. When the pressure in the catheter continues to increase and presses the first piston, the second magnet will also continue to move. When the second magnet moves to the moving position, the adjustable rack is engaged with the third gear, so that the adjustable rack drives the third gear to rotate, and the rotating third gear drives the rotating shaft to rotate. The rotating rotating shaft can drive the second gear and the first gear to rotate, and the rotating first gear drives the threaded sleeve to rotate. The rotating threaded sleeve drives the threaded rod to move, and the moving threaded rod pulls the slider, so that the slider pulls one end of the second spring to stabilize the length of the second spring, thereby stabilizing the force required for the first piston to compress the second spring. When the infusion in the infusion tube is unstable and the infusion speed is too fast, the force required to stabilize the first piston to compress the second spring can further stabilize the pressure in the catheter, so as to stabilize the discharge volume of the die body and further improve the stability of the discharge of the die body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a slot-type coating die head with uniform liquid flow rate proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the overall structure of a slot-type coating die head with uniform liquid flow rate proposed by the present invention;

[0021] Figure 3 for Figure 2 A schematic diagram of the structure enlarged in the middle;

[0022] Figure 4 This is a schematic diagram of the front cross-section structure of a slot coating die head with uniform liquid flow rate proposed by the present invention;

[0023] Figure 5 for Figure 4 The enlarged structural diagram at B in the middle;

[0024] Figure 6 for Figure 4 The enlarged structural diagram at C in the middle;

[0025] Figure 7 This is a schematic side cross-sectional view of a slot coating die head with uniform liquid flow rate proposed by the present invention;

[0026] Figure 8 for Figure 7 The enlarged structural diagram at D in the middle;

[0027] Figure 9 It is a schematic diagram of the cross-sectional structure of the limiting column of the present invention.

[0028] In the figure: 1. die head body; 2. shunt pipe; 3. catheter; 4. infusion tube; 5. tee pipe; 6. gas storage tube; 7. splint; 8. limit rod; 9. nut; 10. first spring; 11. sleeve; 12. first piston; 13. second spring; 14. slider; 15. threaded rod; 16. threaded sleeve; 17. first gear; 18. second gear; 19. fixed seat; 20. rotating shaft; 21. third gear; 22. first magnet; 23. second magnet; 24. guide bar; 25. cannula; 26. insert; 27. teeth; 28. bolt; 29. ​​limit column; 30. spring sheet; 31. connecting block; 32. oblique block; 33. pressure block; 34. gasket. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1-9 A slit coating die with uniform liquid flow rate comprises a die body 1, a plurality of shunt pipes 2 are connected to the side wall of one side of the die body 1, a conduit 3 is fixedly connected to the upper surface of the die body 1, and the end of the shunt pipe 2 away from the die body 1 is connected to the conduit 3, a side wall of the conduit 3 is connected to an infusion tube 4, and the side wall of the other side of the conduit 3 is connected to a tee pipe 5, one end of the tee pipe 5 is connected to a pressure stabilizing adjustment component, and the other end of the tee pipe 5 is connected to an air storage pipe 6, the shunt pipe 2 is a hose, and a splint 7 is provided on one side of the shunt pipe 2, and a limiting rod 8 is provided on one side of the splint 7, one end of the limiting rod 8 passes through the splint 7 and is fixedly connected to the die body 1, and the other end of the limiting rod 8 is threadedly connected to a nut 9, the outer wall of the limiting rod 8 is provided with a first spring 10, and one end of the first spring 10 is against the splint 7.

[0031] It can be seen from the above structure that: by setting the splint 7 and using it in conjunction with the first spring 10, the first spring 10 can push the splint 7 to move, so that the splint 7 clamps the shunt tube 2. At this time, when the liquid is transported to the catheter 3 through the infusion tube 4, the liquid cannot pass through the shunt tube 2 and enter the die body 1. After continuing to transport the liquid, the liquid will first fill the catheter 3. When the liquid fills the catheter 3, the air in the catheter 3 can enter the gas storage tube 6 to store the gas in the catheter 3. After the pressure in the catheter 3 reaches a certain level, the splint 7 will be pressed open, so that the liquid is discharged into the die body 1 through the shunt tube 2 at the same time to ensure the stability of the liquid entering the die body 1. In this way, the shunt tube 2 close to the infusion tube 4 will not enter the liquid first, which will cause uneven liquid inflow and discharge from the die body 1.

[0032] Furthermore, the pressure stabilizing and regulating component includes a sleeve 11 connected to the three-way pipe 5, and the sleeve 11 is fixedly connected to the die body 1, the inner wall of the sleeve 11 is slidably connected to the first piston 12, and one side wall of the first piston 12 is fixedly connected to the second spring 13, and one end of the second spring 13 is fixedly connected to the pressure stabilizing control component; by setting the sleeve 11, the first piston 12 and the second spring 13 for use in conjunction with each other, when the infusion tube 4 is infusing, if the infusion tube 4 is unstable and the infusion speed is too fast, the pressure in the catheter 3 will increase, and the increased pressure will press the first piston 12. When the first piston 12 moves, the liquid in the catheter 3 will enter the sleeve 11 through the three-way pipe 5 to relieve the pressure in the catheter 3, and then stabilize the pressure in the catheter 3. Stabilizing the pressure in the catheter 3 can stabilize the speed at which the liquid enters the die body 1 through the shunt pipe 2, and then stabilize the discharge speed of the die body 1, further avoiding the problem of uneven discharge of the die body 1.

[0033] Furthermore, the voltage stabilizing control component includes a slider 14 fixedly connected to the second spring 13, the slider 14 is slidably connected to the inner wall of the sleeve 11, and one side wall of the slider 14 is fixedly connected to a threaded rod 15, the outer wall of the threaded rod 15 is threadedly sleeved with a threaded sleeve 16, and the outer wall of the threaded sleeve 16 is fixedly sleeved with a first gear 17, one side wall of the first gear 17 is meshed with a second gear 18, one end of the sleeve 11 is fixedly connected to a fixing seat 19, and the second gear 18 is located inside the fixing seat 19, and one side wall of the second gear 18 is fixedly connected to a rotating shaft 20, and One end of the rotating shaft 20 passes through the fixed seat 19 and extends to the outside of the fixed seat 19. The rotating shaft 20 is rotatably connected to the fixed seat 19. One end of the rotating shaft 20 is fixedly connected to the third gear 21. A first magnet 22 is provided inside the first piston 12, and a second magnet 23 is provided on one side of the first magnet 22. The second magnet 23 is located outside the sleeve 11. A guide bar 24 is fixedly connected to the outer wall of the sleeve 11, and the guide bar 24 is slidably connected to the second magnet 23. An adjustable rack is provided on one side of the second magnet 23. By setting the threaded rod 15 and the threaded sleeve 16, etc. When used in conjunction with each other, when the first piston 12 moves, the moving first piston 12 will drive the second magnet 23 to move through the first magnet 22. When the pressure in the conduit 3 continues to increase and presses the first piston 12, the second magnet 23 will also continue to move. When the second magnet 23 moves to the moving position, the adjustable rack engages with the third gear 21, so that the adjustable rack drives the third gear 21 to rotate, and the rotating third gear 21 drives the rotating shaft 20 to rotate. The rotating rotating shaft 20 can drive the second gear 18 and the first gear 17 to rotate, and the rotating first gear 17 drives the The movable threaded sleeve 16 rotates, and the rotating threaded sleeve 16 drives the threaded rod 15 to move. The moving threaded rod 15 pulls the slider 14, so that the slider 14 pulls one end of the second spring 13, stabilizes the length of the second spring 13, and further stabilizes the force required for the first piston 12 to compress the second spring 13. When the infusion in the infusion tube 4 is unstable and the infusion speed is too fast, the force required to stabilize the first piston 12 to compress the second spring 13 can further stabilize the pressure in the catheter 3, so as to stabilize the discharge volume of the die body 1 and further improve the stability of the discharge of the die body 1.

[0034] Furthermore, the adjustable rack includes a tube 25 fixedly connected to the second magnet 23, and the inner wall of the tube 25 is slidably connected to an insertion strip 26, a side wall of the insertion strip 26 is fixedly connected to a plurality of teeth 27, and the outer wall of the tube 25 is threadedly connected to a bolt 28, and one end of the bolt 28 passes through the tube 25 and abuts against the insertion strip 26; by setting an adjustable rack composed of the tube 25 and the insertion strip 26, the position of the teeth 27 can be adjusted to ensure that after the first piston 12 and the second magnet 23 move to a certain position, the teeth 27 can engage with the third gear 21.

[0035] Furthermore, a side wall of the die body 1 is fixedly connected to a limiting post 29, and the limiting post 29 is set through the clamping plate 7, and the limiting post 29 is slidably connected to the clamping plate 7. A cavity is opened inside the limiting post 29, and a spring sheet 30 is set in the cavity. Both ends of the spring sheet 30 are fixedly connected to a connecting block 31, and a side wall of the connecting block 31 is respectively fixedly connected to an oblique block 32 and a pressure block 33, and the oblique block 32 and the pressure block 33 are all set through the limiting post 29. By setting the limiting post 29 Used in conjunction with the spring sheet 30, etc., before use, press the pressure block 33 so that the pressure block 33 drives the connecting block 31 and the oblique block 32 to move, so that the oblique block 32 is retracted into the cavity. After the oblique block 32 is retracted into the cavity, the first spring 10 can push the splint 7 to move, so that the splint 7 clamps the diverter tube 2. When the liquid presses open the diverter tube 2, the splint 7 will move. After the splint 7 moves to a certain position, the oblique block 32 can pass through the splint 7, thereby allowing the oblique block 32 to limit the splint 7.

[0036] Furthermore, a gasket 34 is rotatably connected to one side wall of the nut 9, and one side wall of the gasket 34 abuts against the first spring 10; by providing the gasket 34, one end of the first spring 10 will not rub against the nut 9 when the nut 9 is rotated.

[0037] Furthermore, the force for compressing the second spring 13 is smaller than the force for compressing the first spring 10; by setting the force for compressing the second spring 13 to be smaller than the force for compressing the first spring 10, it can be ensured that the splint 7 will not be pressed open until the second spring 13 is compressed to a certain extent.

[0038] In the present invention, before use, the pressing block 33 is pressed, so that the pressing block 33 drives the connecting block 31 and the oblique block 32 to move, so that the oblique block 32 is retracted into the cavity. After the oblique block 32 is retracted into the cavity, the first spring 10 can push the clamping plate 7 to move, so that the clamping plate 7 clamps the shunt tube 2. At this time, when the liquid is transported to the catheter 3 through the infusion tube 4, the liquid cannot pass through the shunt tube 2 and enter the die body 1. After the liquid is continuously transported, the liquid will first fill the catheter 3. When the liquid fills the catheter 3, the air in the catheter 3 can enter the gas storage tube 6 to store the gas in the catheter 3. After the pressure in the catheter 3 reaches a certain level, the liquid will be pressed into the sleeve 11 and enter the sleeve 11. The liquid will press the first piston 12, causing the first piston 12 to move, and the moving piston compresses the second spring 13. After the pressure in the conduit 3 and the shunt pipe 2 continues to rise to a certain level, the hydraulic pressure will press open the shunt pipe 2, allowing the liquid to enter the die body 1 through the shunt pipe 2, and then the liquid can be discharged through the die body 1. Since the multiple shunt pipes 2 are clamped and sealed by a clamping plate 7, when the clamping plate 7 is opened, all the shunt pipes 2 will open at the same time, allowing the liquid to pass through multiple shunt pipes 2 at the same time to ensure the stability of the liquid entering the die body 1. In this way, the shunt pipe 2 close to the infusion pipe 4 will not enter the liquid first, which will cause the problem of uneven liquid inflow and discharge from the die body 1.

[0039] When the infusion tube 4 is infusing, if the infusion tube 4 is unstable and the infusion speed is too fast, the pressure in the catheter 3 will increase, and the increased pressure will press the first piston 12. When the first piston 12 moves, the liquid in the catheter 3 will enter the sleeve 11 through the three-way pipe 5 to relieve the pressure in the catheter 3, thereby stabilizing the pressure in the catheter 3. Stabilizing the pressure in the catheter 3 can stabilize the speed at which the liquid enters the die body 1 through the shunt pipe 2, and thus stabilize the discharge speed of the die body 1, further avoiding the problem of uneven discharge of the die body 1.

[0040] When the first piston 12 moves, the moving first piston 12 will drive the second magnet 23 to move through the first magnet 22. When the pressure in the conduit 3 continues to increase and presses the first piston 12, the second magnet 23 will also continue to move. When the second magnet 23 moves to the moving position, the adjustable rack engages with the third gear 21, so that the adjustable rack drives the third gear 21 to rotate. The rotating third gear 21 drives the rotating shaft 20 to rotate. The rotating rotating shaft 20 can drive the second gear 18 and the first gear 17 to rotate. The rotating first gear 17 drives the screw The threaded sleeve 16 rotates, and the rotating threaded sleeve 16 drives the threaded rod 15 to move. The moving threaded rod 15 pulls the slider 14, so that the slider 14 pulls one end of the second spring 13, stabilizes the length of the second spring 13, and further stabilizes the force required for the first piston 12 to compress the second spring 13. When the infusion in the infusion tube 4 is unstable and the infusion speed is too fast, the force required to stabilize the first piston 12 to compress the second spring 13 can further stabilize the pressure in the catheter 3, so as to stabilize the discharge volume of the die body 1 and further improve the stability of the discharge of the die body 1.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A slot coating die with uniform liquid flow rate, comprising a die body (1), wherein a side wall of the die body (1) is connected to a plurality of diversion pipes (2), characterized in that: The upper surface of the die body (1) is fixedly connected with a conduit (3), and one end of the shunt tube (2) away from the die body (1) is connected to the conduit (3), one side wall of the conduit (3) is connected to an infusion tube (4), and the other side wall of the conduit (3) is connected to a three-way tube (5), one end of the three-way tube (5) is connected to a pressure regulating assembly, and the other end of the three-way tube (5) is connected to an air storage tube (6), the shunt tube (2) is a hose, and a splint (7) is provided on one side of the shunt tube (2), and a limiting rod (8) is provided on one side of the splint (7), one end of the limiting rod (8) passes through the splint (7) and is fixedly connected to the die body (1), and the other end of the limiting rod (8) is threadedly connected to a nut (9), the outer wall of the limiting rod (8) is provided with a first spring (10), and one end of the first spring (10) is against the splint (7); The first spring (10) pushes the clamp (7) to move, so that the clamp (7) clamps the shunt tube (2). At this time, when the liquid is transported to the catheter (3) through the infusion tube (4), the liquid cannot pass through the shunt tube (2) and enter the die body (1). After the liquid is transported, the liquid will first fill the catheter (3). When the liquid fills the catheter (3), the air in the catheter (3) enters the gas storage tube (6) to store the gas in the catheter (3). After the pressure in the catheter (3) reaches a certain level, the clamp (7) is pressed open, so that the liquid is discharged into the die body (1) through the shunt tube (2) at the same time, so as to ensure the stability of the liquid entering the die body (1); in this way, the shunt tube (2) close to the infusion tube (4) will not enter the liquid first, which will cause the die body (1) to have uneven liquid inflow and discharge. The pressure regulating assembly comprises a sleeve (11) connected to the three-way pipe (5), and the sleeve (11) is fixedly connected to the die body (1), the inner wall of the sleeve (11) is slidably connected to a first piston (12), and a side wall of one side of the first piston (12) is fixedly connected to a second spring (13), and one end of the second spring (13) is fixedly connected to a pressure regulating control member; When the infusion tube (4) is infusing liquid, if the infusion tube (4) is unstable and the infusion speed is too fast, the pressure in the catheter (3) will increase, and the increased pressure will press the first piston (12). When the first piston (12) moves, the liquid in the catheter (3) will enter the sleeve (11) through the three-way pipe (5) to relieve the pressure in the catheter (3), thereby stabilizing the pressure in the catheter (3), stabilizing the pressure in the catheter (3), stabilizing the speed of the liquid entering the die body (1) through the diversion pipe (2), and thus stabilizing the speed of the die body (1) discharging liquid; further avoiding the problem of uneven discharge of the die body (1); The voltage stabilizing control component includes a slider (14) fixedly connected to the second spring (13), and a side wall of the slider (14) is fixedly connected to a threaded rod (15), an outer wall of the threaded rod (15) is threadedly sleeved with a threaded sleeve (16), and an outer wall of the threaded sleeve (16) is fixedly sleeved with a first gear (17), a side wall of the first gear (17) is meshed with a second gear (18), one end of the sleeve (11) is fixedly connected to a fixing seat (19), and the second gear (18) is located inside the fixing seat (19), a side wall of the second gear (18) is fixedly connected to a rotating shaft (20), and the rotating shaft (20) is fixedly sleeved with a second gear (18). ) one end of which passes through the fixed seat (19) and extends to the outside of the fixed seat (19); the rotating shaft (20) is rotatably connected to the fixed seat (19); one end of the rotating shaft (20) is fixedly connected to a third gear (21); a first magnet (22) is provided inside the first piston (12), and a second magnet (23) is provided on one side of the first magnet (22); the second magnet (23) is located outside the sleeve (11); a guide bar (24) is fixedly connected to the outer wall of the sleeve (11), and the guide bar (24) is slidably connected to the second magnet (23); an adjustable rack is provided on one side of the second magnet (23); When the first piston (12) moves, the moving first piston (12) drives the second magnet (23) to move through the first magnet (22). When the pressure in the conduit (3) continues to increase and presses the first piston (12), the second magnet (23) also continues to move. When the second magnet (23) moves to the moving position, the adjustable rack engages with the third gear (21), so that the adjustable rack drives the third gear (21) to rotate. The rotating third gear (21) drives the rotating shaft (20) to rotate. The rotating rotating shaft (20) drives the second gear (18) and the first gear (17) to rotate. The rotating first gear (17) drives the screw The threaded sleeve (16) rotates, and the rotating threaded sleeve (16) drives the threaded rod (15) to move. The moving threaded rod (15) pulls the slider (14), so that the slider (14) pulls one end of the second spring (13), stabilizes the length of the second spring (13), and further stabilizes the force required for the first piston (12) to compress the second spring (13). When the infusion of the infusion tube (4) is unstable and the infusion speed is too fast, the force required for the first piston (12) to compress the second spring (13) is stabilized, and the pressure in the catheter (3) is further stabilized, so as to stabilize the discharge volume of the die body (1), and further improve the stability of the discharge of the die body (1); The adjustable rack includes a cannula (25) fixedly connected to the second magnet (23), and the inner wall of the cannula (25) is slidably connected to a plug strip (26), a side wall of the plug strip (26) is fixedly connected to a plurality of teeth (27), the outer wall of the cannula (25) is threadedly connected to a bolt (28), and one end of the bolt (28) passes through the cannula (25) and abuts against the plug strip (26); a limiting column (29) is fixedly connected to one side wall of the die body (1), and The limiting column (29) is arranged to pass through the splint (7), and the limiting column (29) is slidably connected to the splint (7). A cavity is provided inside the limiting column (29), and a spring sheet (30) is provided in the cavity. Both ends of the spring sheet (30) are fixedly connected to a connecting block (31), and a side wall of one side of the connecting block (31) is fixedly connected to an oblique block (32) and a pressure block (33), respectively. The oblique block (32) and the pressure block (33) are both arranged to pass through the limiting column (29).

2. A slot coating die with uniform liquid flow rate according to claim 1, characterized in that: A washer (34) is rotatably connected to one side wall of the nut (9), and one side wall of the washer (34) abuts against the first spring (10).

3. The slot coating die head with uniform liquid flow rate according to claim 1, characterized in that: The force used to compress the second spring (13) is smaller than the force used to compress the first spring (10), ensuring that the clamping plate (7) is pressed open only after the second spring (13) is compressed to a certain extent.

Images