Air floating die head and double-sided simultaneous coating equipment

Abstract

The application discloses a gas floating die head, which comprises an upper die head, a lower die head and a gasket arranged between the upper die head and the lower die head, the upper die head, the lower die head and the gasket form a coating gap, the upper die head and the lower die head form a lip on the front side of the gas floating die head, the lip is provided with a lip strip, the side surface of the lower die head is provided with a gas source inlet, the rear of the upper die head and the lower die head is provided with a precision adjustment mechanism for moving the upper die head along the front-rear direction of the gas floating die head so as to align or stagger the die lips of the upper die head and the lower die head, and the application also discloses a double-sided simultaneous coating device, which comprises a first coating die head, a coating steel roller, a rubber pressing roller, a gas floating roller, a first gas floating plate, a second gas floating plate, a second coating die head, an adjusting mechanism, a thickness gauge and a suspension oven. The application can form a stable gas mold on the surface of the lip, realize stable support of the foil, avoid friction between the lip and the foil, avoid foil shaking caused by die coating, improve the stability of the foil in the coating process, and adjust the distance between the die head and the foil and the staggered distance between the upper and lower lips.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pole piece coating equipment, in particular to a gas floating die head and a double-sided simultaneous coating equipment. BACKGROUND

[0002] The existing lithium battery pole piece double-sided simultaneous coating equipment has various specific forms, and the common feature is to first coat the A surface according to the conventional coating method: the die head is horizontally arranged, and the back roller is used to stably support the back surface of the foil to complete the high-quality coating of the A surface. When coating the B surface, there are two ways. The first way is that the gas floating die head is vertically upward, the B surface light foil is supported by the protrusion (misaligned lip die) of the lower lip to ensure that the distance between the lip and the light foil in front is stable and accurate, so as to realize stable coating of the B surface. After the B surface is coated, the wet films of the two surfaces enter the suspension oven together. The disadvantage of this coating method is that the distance between the lip of the gas floating die head and the light foil in front is determined by the height of the lip protrusion, which cannot be adjusted, and the universality is poor. Moreover, the B surface light foil is easy to be scraped at the lip protrusion, and the wet film shakes before entering the oven without support. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the present application provides a gas floating die head and a double-sided simultaneous coating equipment, which can form a stable gas mold on the surface of the lip of the die head, realize stable support of the foil while avoiding mechanical friction between the lip and the foil, avoid the scraping phenomenon, avoid the shaking of the foil caused by the die head coating, improve the stability of the foil during the coating process, improve the coating quality, and adjust the distance between the gas floating die head and the foil and the misalignment distance between the upper and lower lips.

[0004] The technical scheme adopted by the present application to solve the technical problems is as follows:

[0005] A gas floating die head, comprising an upper die head, a lower die head and a gasket, the gasket is arranged between the upper die head and the lower die head, and the upper die head and the lower die head surround the gasket to form a coating gap, the upper die head and the lower die head form a lip on the front side of the gas floating die head for slurry to flow out of the coating gap, the lip is provided with a lip strip, the lip strip is arranged along the length direction of the die head, the surface of the lip strip has air holes, the lip strip and the side wall of the lip form a cavity, the lower die head is provided with a gas source inlet on the side surface, the gas source inlet is communicated with the cavity, the gas source inlet is used to connect a gas source, the rear of the upper die head and the lower die head is provided with a precision adjustment mechanism, the precision adjustment mechanism is used to drive the upper die head to move along the front-rear direction of the gas floating die head so that the die lip of the upper die head and the die lip of the lower die head are aligned or misaligned.

[0006] As a preferred technical scheme, the precision adjustment mechanism comprises a displacement sensor, a shaft coupling, a first servo motor, a differential bolt and a fixed seat, the fixed seat is fixedly installed on the lower die head, the servo motor is connected with the fixed seat through the shaft coupling, one end of the differential bolt is connected with the servo motor, and the other end of the differential bolt is connected with the upper die head through the fixed seat, and the displacement sensor is arranged on the fixed seat and used for detecting a displacement signal of the upper die head.

[0007] As a preferred technical scheme, the precision adjustment mechanism comprises a displacement sensor, a differential bolt and a fixed seat, the fixed seat is fixedly installed on the lower die head, the differential bolt is connected with the upper die head through the fixed seat, and the displacement sensor is arranged on the fixed seat and used for detecting a displacement signal of the upper die head.

[0008] As a preferred technical scheme, one side of the lower die head is provided with an air pipe joint, the air source inlet is connected with an air source through the air pipe joint, and the air source is compressed air with a pressure of 0.2 Mpa-0.8 Mpa.

[0009] As a preferred technical scheme, a main gas flow channel and a plurality of branch gas flow channels are arranged in the lower die head, the branch gas flow channels are communicated with the main gas flow channel, the air source inlet is communicated with the main gas flow channel, and the cavity is communicated with the branch gas flow channels.

[0010] A double-sided simultaneous coating device comprises a first coating die head, a second coating die head, a coating steel roller, a rubber pressure roller, an air float roller, a first air float plate, a pair of second air float plates and a suspension oven, the second air float plates are staggered between the suspension oven and the second coating die head, further comprising an adjusting mechanism and a thickness gauge, the second coating die head adopts an air float die head, the thickness gauge is arranged on both sides of the oven, and the adjusting mechanism is arranged on the second coating die head and used for adjusting the front and back positions of the second coating die head.

[0011] As a preferred technical scheme, the first coating die head forms an included angle with a horizontal plane, and the included angle is 5°-45°.

[0012] As a preferred technical scheme, a displacement adjusting assembly is arranged on the first air float plate, the displacement adjusting assembly comprises a hand adjusting handle and a lead screw, a hand adjusting lead screw is arranged at one end of the lead screw, and the first air float plate is adjusted in left and right positions through the hand adjusting handle and the lead screw.

[0013] As a preferred technical scheme, the adjusting mechanism comprises a second servo motor, a precision speed reducer and a ball screw, the second coating die head is arranged above the ball screw, the ball screw is driven to move forward and backward by the second servo motor and the precision speed reducer, so that the position of the second coating die head is adjusted.

[0014] As a preferred technical scheme, the thickness gauge comprises a first thickness gauge and a second thickness gauge, the first thickness gauge is arranged on the front side of the oven for wet film thickness measurement, and the second thickness gauge is arranged on the rear side of the oven for dry film thickness measurement.

[0015] The application has the advantages that the air floating die head and the double-sided simultaneous coating equipment are provided, the lip strip is arranged on the lip to form a cavity, the gas pipe joint box is arranged on the side of the lower die head, the gas is delivered in the lower die head, the stable air die is formed on the surface of the lip of the die head, the stable support of the foil is realized, the mechanical friction between the lip and the foil is avoided, the scratch phenomenon is avoided, the foil shaking caused by the die head coating is avoided, the stability of the foil in the coating process is improved, and the coating quality is improved; the close adjusting mechanism arranged behind the upper die head and the lower die head and the adjusting mechanism arranged below the second coating die head can adjust the distance between the second coating die head and the foil and the dislocation distance between the upper and lower lips, so that the requirement of different distances between the die head lip and the front light foil is met. BRIEF DESCRIPTION OF DRAWINGS

[0016] The application will be further described below in combination with the drawings and examples.

[0017] Figure 1 is a perspective view of an air floating die head provided by an embodiment of the application;

[0018] Figure 2 is a side view of an air floating die head provided by the above embodiment of the application;

[0019] Figure 3 is Figure 2 a sectional view at A-A in FIG.

[0020] Figure 4 is a rear view of an air floating die head provided by the above embodiment of the application;

[0021] Figure 5 is Figure 4 a sectional view at B-B in FIG.

[0022] Figure 6 is a side view of an air floating die head provided by a second embodiment of the application;

[0023] Figure 7 is Figure 6 a sectional view at C-C in FIG.

[0024] Figure 8 is a rear view of a gas float die provided by a second embodiment of the present application;

[0025] Figure 9 is Figure 8 is a sectional view at D-D in FIG. 6;

[0026] Figure 10 is a further side view provided by an embodiment of the present application;

[0027] Figure 11 is a schematic view of a double-sided simultaneous coating device provided by an embodiment of the present application;

[0028] Figure 12 is Figure 11 is a schematic view of an adjusting mechanism in FIG. 7;

[0029] Figure 13 is Figure 11 is a schematic view of a displacement adjusting assembly in FIG. 8. DETAILED DESCRIPTION

[0030] The concept, specific structure and generated technical effects of the present application will be described clearly and completely in combination with embodiments and drawings, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. In addition, all the coupling / connection relations involved in the patent do not mean that the components are directly connected, but means that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation situation. The technical features in the present application can be combined interactively without mutual contradiction and conflict.

[0031] Embodiment 1

[0032] Please refer to Figures 1-5The application discloses a gas float die head, which comprises an upper die head 1, a lower die head 2 and a gasket 3, the gasket 3 is arranged between the upper die head 1 and the lower die head 2 and forms a coating slit together with the upper die head 1 and the lower die head 2, the upper die head 1 and the lower die head 2 form a lip for the slurry to flow out of the coating slit at the front side of the gas float die head, a lip strip 5 is arranged at the lip of the lower die head 2 to avoid the contact between the foil and the lip, the lip strip 5 is arranged along the length direction of the lower die head 2, the surface of the lip strip 5 is provided with air holes, the lip strip 5 and the side wall of the lip form a cavity, a precision adjusting mechanism 13 is arranged at the rear side of the upper die head 1 and the lower die head 2, the precision adjusting mechanism 13 is used for driving the upper die head 1 to move along the front-rear direction of the gas float die head to align or stagger the die lip of the upper die head 1 and the die lip of the lower die head 2, a gas source inlet is arranged at one side of the lower die head 2, the gas source inlet is communicated with the cavity, the gas source inlet is used for connecting a gas source, a gas pipe joint 4 is arranged at one side of the lower die head 2, the gas source inlet is connected with the gas source through the gas pipe joint 4, wherein the gas source is compressed air, and the pressure is 0.2-0.8 MPa.

[0033] The lower die head 2 is provided with a main gas flow channel 11 and a plurality of branch gas flow channels 12, the branch gas flow channels 12 are communicated with the main gas flow channel 11, the gas source joint is communicated with the main gas flow channel 11, and the cavity is communicated with the branch gas flow channels 12, so that the compressed air can be uniformly delivered to the lip strip 5 through the main gas flow channel 11 and the branch gas flow channels 12, thereby forming a stable and uniform air film of micron level on the surface of the lip.

[0034] In the application, the lip strip 5 made of porous medium material is inlaid at the lip to avoid the contact between the foil and the lip, and the distance between the lip and the lip strip 5 is micron level, wherein the porous medium material can be porous graphite or porous metal alloy, the cross section shape of the lip strip 5 is fan-shaped, the angle of the fan-shaped is 90-180 degrees, and the actual shape can be arranged according to actual needs. The gas source inlet is arranged at the side of the lower die head 2, and the gas pipe joint 4 is arranged on the gas source inlet, wherein the lip strip 5 and the side wall of the lip form a cavity, the gas source is connected through the gas pipe joint 4, a plurality of gas flow channels are arranged in the lower die head 2, the compressed air can be uniformly delivered to the lip strip 5 through the gas pipe joint 4, thereby forming a stable and uniform air film of micron level on the surface of the lip, the foil passing through the lip can be stably floated to avoid mechanical friction, and the stable distance of micron level can be formed. The lip strip 5 can also be made of the plate material with uniformly distributed air holes.

[0035] The precision adjustment mechanism 13 comprises a displacement sensor 135, a shaft coupling 133, a first servo motor 132, a differential bolt 134 and a fixed seat 131, the fixed seat 131 is fixedly installed on the lower die head 2, the first servo motor 132 is connected with the fixed seat 131 through the shaft coupling 133, one end of the differential bolt 134 is connected with the first servo motor 132, the other end is connected with the upper die head 1 through the fixed seat 131, the upper die head 1 is pushed forward or pulled backward to form a composite distance required with the lower die head 2 through the differential thread structure, the displacement sensor 135 is arranged on the fixed seat 131 and is used for detecting the displacement signal of the upper die head 1.

[0036] The rear end of the upper die head 1 and the lower die head 2 is provided with a fixed block 9, one side of the upper die head 1 and the lower die head 2 is provided with a fixed block 9, the fixed block 9 is arranged on both sides of the rear end of the die head and is fixed on the die head through bolts, and is used for fixedly connecting the upper die head 1 and the lower die head 2.

[0037] The rear end of the upper die head 1 and the lower die head 2 is further provided with a hinge bracket 7 and a turnover positioning block 10, the hinge bracket 7 has two, the upper die head 1 and the lower die head 2 are connected through the hinge bracket 7, the upper die head 1 is conveniently turned over when cleaning, the upper die head 1 is turned over along the hinge bracket 7 after cleaning, and the upper die head 1 is overlapped on the lower die head 2, and the turnover positioning block 10 is used for assisting the hinge bracket 7 to turn over the die head.

[0038] The rear end of the lower die head 2 is provided with a feeding port communicated with the lower die head 2, and the rear end of the lower die head 2 is provided with a feeding mounting seat 8, the feeding mounting seat 8 is communicated with the feeding port and is used for connecting a feeding pipeline.

[0039] Specifically, the fixed block 9, the hinge bracket 7 and the turnover positioning block 10 are fixedly connected through bolts.

[0040] Further, a plurality of through holes in a row are formed in the front side of the upper end of the upper die head 1, a micrometer 6 is installed in the through hole, a T block connected with the lower end of the micrometer 6 is arranged below the through hole, the T block is controlled to move up and down by adjusting the micrometer 6, the size of the outlet gap is changed, and then the coating surface density is adjusted.

[0041] Please refer to Figures 11-13The application discloses a double-sided simultaneous coating device, which comprises a first coating die head 14, a second coating die head 15, a coating steel roller 17, a rubber pressure roller 16, an air floatation roller 20, a first air floatation plate 18, a pair of second air floatation plates 21, a suspension oven 23, an adjusting mechanism 19 and a thickness gauge, wherein the second coating die head 15 is an air floatation die head, the first coating die head 14 is arranged opposite to the coating steel roller 17, the second air floatation plates 21 are arranged staggeredly between the suspension oven 23 and the second coating die head 15, the thickness gauges 22 are arranged on the two sides of the suspension oven 23 respectively, the first coating die head 15 forms an angle with the horizontal plane, the angle is 5-45 degrees, so that the foil is stable enough during coating, the adjusting mechanism 19 is arranged on the second coating die head 15 and used for adjusting the front and back positions of the second coating die head 15, so that the distance between the lip and the foil can be adjusted accurately in a large range.

[0042] The first air floatation plate 18 is arranged between the coating die head and the air floatation roller 20 and used for supporting the foil, one side of the first air floatation plate 18 is provided with a plurality of nozzles, gas enters the cavity from the plurality of nozzles, the air pressure in the first air floatation plate 18 is adjusted, the first air floatation plate 18 is provided with a displacement adjusting assembly 24, the displacement adjusting assembly 24 comprises a hand adjusting handle 241 and a screw rod 242, a connecting seat is slidably arranged in the screw rod 242, one end of the connecting seat is connected with the first air floatation plate 18 through a connecting shaft, the hand adjusting handle 241 is arranged at one end of the screw rod 242, the first air floatation plate 18 is adjusted in position left and right through the hand adjusting handle 241 and the screw rod 242, so that the foil can keep stable tension and angle, and a plurality of groups of the first air floatation plate 18 can be arranged between the coating die head and the air floatation roller 20 according to requirements.

[0043] The second air floatation plates 21 are arranged staggeredly between the suspension oven 23 and the second coating die head 15, support the double-sided wet film entering the suspension oven 23 and attenuate the shaking transmitted in the suspension oven 23. The air floatation roller 20 is arranged behind the air floatation die head, stably reverses the wet film completing coating by 90-160 degrees without contact and can isolate the shaking transmitted from the suspension oven 23, so as to reduce the influence on B-side coating. Through the cooperation of the second air floatation plates 21 and the air floatation roller 20, the shaking of the foil is reduced, and the coating requirements and quality of the B side are ensured.

[0044] Specifically, the air floatation roller 20, the first air floatation plate 18 and the second air floatation plate 21 are all made of porous medium material, and the roller surfaces of the first air floatation plate 18 and the second air floatation plate 21 are arc-shaped.

[0045] Further, the thickness gauge includes a first thickness gauge 22 and a second thickness gauge 25, the first thickness gauge 22 is arranged at the front side of the suspension oven 23 for wet film thickness measurement, and the second thickness gauge 25 is arranged at the rear side of the suspension oven 23 for dry film thickness measurement, and the wet film thickness coated by the second die is further controlled by the cooperation of the two thickness gauges 22.

[0046] The adjusting mechanism 19 includes a second servo motor 191, a precision speed reducer 192 and a ball screw 193, the second coating die 15 is arranged above the ball screw 193, and the ball screw 193 is driven by the second servo motor 191 and the precision speed reducer 192 to move forward and backward, so as to adjust the position of the second coating die 15. The second coating die 15 can also be adjusted by a cylinder, a slope block and the second servo motor 191 to move forward and backward.

[0047] In the specific application of the present application, when the distance between the lip of the second coating die 15 and the foil needs to be adjusted, the second coating die 15 is first moved horizontally to the left to the working position, and the first air floating plate 18 is also moved horizontally to the right to the required position, and then the trial coating is performed. The wet film and the dry film are detected by the thickness gauges 22 arranged at the front and rear sides of the suspension oven 23, the air pressure of the lip strip 5 is adjusted according to the detection results, and the distance between the second coating die 15 and the foil and the misalignment distance between the upper and lower lips are adjusted by the precise adjusting mechanism 13, so as to meet the requirement of different distances between the die lip and the front light foil.

[0048] Embodiment 2

[0049] Please refer to Figure 1 The air floating die includes an upper die 1, a lower die 2 and a gasket 3, the gasket 3 is arranged between the upper die 1 and the lower die 2, and surrounds the upper die 1 and the lower die 2 to form a coating slit, the upper die 1 and the lower die 2 form a lip at the front side of the air floating die for slurry to flow out of the coating slit, the lip of the lower die 2 is provided with a lip strip 5 to avoid the contact between the foil and the lip, the lip strip 5 is arranged along the length direction of the lower die 2, the surface of the lip strip 5 has air holes, and the lip strip 5 and the side wall of the lip form a cavity, please refer to Figures 6-9The back of the upper die head 1 and the lower die head 2 is provided with a precision adjustment mechanism 13, the precision adjustment mechanism 13 is used to drive the upper die head 1 to move along the front and back direction of the air floating die head so that the die lip of the upper die head 1 and the die lip of the lower die head 2 are aligned or staggered, one side of the lower die head 2 is provided with an air source inlet, the air source inlet is communicated with the cavity, the air source inlet is used to connect the air source, one side of the lower die head 2 is provided with a gas pipe joint 4, the air source inlet connects the air source through the gas pipe joint 4, wherein the air source is compressed air, and the pressure is 0.2-0.8 MPa.

[0050] The lower die head 2 is provided with a main gas flow channel 11 and a plurality of branch gas flow channels 12, the branch gas flow channels 12 are communicated with the main gas flow channel 11, the air source joint is communicated with the main gas flow channel 11, and the cavity is communicated with the branch gas flow channels 12, and the compressed air can be uniformly delivered to the lip strip 5 through the main gas flow channel 11 and the branch gas flow channels 12, so that a micron-level stable and uniform gas film is formed on the lip surface.

[0051] In the application, a lip strip 5 made of porous medium material is embedded at the lip, so that the foil and the lip are prevented from contacting, and the distance between the lip and the lip strip 5 is micron-level, wherein the porous medium material can be porous graphite or porous metal alloy, the cross-sectional shape of the lip strip 5 is a sector, and the angle of the sector is 90-180°, and the actual shape can be set according to actual needs. The lower die head 2 is provided with an air source inlet, and the air source inlet is provided with a gas pipe joint 4, wherein the lip strip 5 and the side wall of the lip form a cavity, the air source is connected through the gas pipe joint 4, a plurality of gas flow channels are arranged in the lower die head 2, the compressed air can be uniformly delivered to the lip strip 5 through the gas pipe joint 4, so that a micron-level stable and uniform gas film is formed on the lip surface, the foil passing through the lip can be stably floated to avoid mechanical friction, and a micron-level stable distance can be formed. The lip strip 5 can also be composed of a plate material with uniformly distributed air holes.

[0052] The precision adjustment mechanism 13 comprises a displacement sensor 135, a differential screw 134 and a fixed seat 131, the fixed seat 131 is fixedly installed on the lower die head 2, the differential screw 134 is connected with the upper die head 1 through the fixed seat 131, the upper die head 1 is pushed forward or pulled backward through the differential screw structure to form a composite required distance with the lower die head 2, and the displacement sensor 135 is arranged on the fixed seat 131 and used to detect the displacement signal of the upper die head 1.

[0053] The rear end of the upper die head 1 and the lower die head 2 is provided with a fixing block 9, one side of the upper die head 1 and the lower die head 2 is provided with a fixing block 9, the fixing block 9 is arranged on both sides of the rear end of the die head, is fixed on the die head through bolts, is used for fixedly connecting the upper die head 1 and the lower die head 2, when the die head works, the upper die head 1 and the lower die head 2 are fixedly connected through the fixing block 9, so that the longitudinal or transverse relative movement of the two cannot be carried out, and the precision of the length and width of the coating slit is improved.

[0054] The rear end of the upper die head 1 and the lower die head 2 is provided with a fixing block 9, one side of the upper die head 1 and the lower die head 2 is provided with a fixing block 9, the fixing block 9 is arranged on both sides of the rear end of the die head, is fixed on the die head through bolts, is used for fixedly connecting the upper die head 1 and the lower die head 2, when the die head works, the upper die head 1 and the lower die head 2 are fixedly connected through the fixing block 9, so that the longitudinal or transverse relative movement of the two cannot be carried out, and the precision of the length and width of the coating slit is improved.

[0055] The rear end of the lower die head 2 is provided with a feeding port communicated with the lower die head 2, and the rear end of the lower die head 2 is provided with a feeding mounting seat 8, which is communicated with the feeding port and is used for connecting a feeding pipeline.

[0056] Specifically, the fixing block 9, the hinge bracket 7 and the turnover positioning block 10 are fixedly connected through bolts. Further, a plurality of through holes in a row are formed in the front side of the upper end of the upper die head 1, a micrometer 6 is mounted in the through hole, a T block connected with the lower end of the micrometer 6 is arranged below the through hole, the size of the outlet slit is changed by adjusting the micrometer 6 to control the up-down movement of the T block, so that the coating surface density is adjusted.

[0057] Please refer to Figures 11-13 A double-sided simultaneous coating equipment, comprising a first coating die head 14, a second coating die head 15, a coating steel roller 17, a rubber pressure roller 16, an air float roller 20, a first air float plate 18, a pair of second air float plates 21, a suspension oven 23, an adjusting mechanism 19 and a thickness gauge, wherein the second coating die head 15 adopts an air float die head, the first coating die head 14 is arranged opposite to the coating steel roller 17, the second air float plates 21 are arranged staggered between the suspension oven 23 and the second coating die head 15, the thickness gauges 22 are arranged on both sides of the suspension oven 23, the first coating die head 15 forms an angle with the horizontal plane, the angle is 5°-45°, so as to ensure that the foil is stable enough during coating, and the adjusting mechanism 19 is arranged on the second coating die head 15, and is used for adjusting the front-rear position of the second coating die head 15, so as to realize large-range and accurate adjustment of the distance between the lip and the foil.

[0058] The first air float plate 18 is arranged between the coating die and the air float roller 20, and is used to support the foil. The first air float plate 18 is provided with a plurality of nozzles on one side, so that gas enters the cavity from the plurality of nozzles to adjust the air pressure inside the first air float plate 18. The first air float plate 18 is provided with a displacement adjusting assembly 24, which includes a hand adjusting handle 241 and a lead screw 242. The lead screw 242 is slidably provided with a connecting seat at one end of which a connecting shaft is connected to the first air float plate 18. The hand adjusting handle 241 is arranged at one end of the lead screw 242. The first air float plate 18 is adjusted in left and right positions by the hand adjusting handle 241 and the lead screw 242, so as to ensure that the foil maintains stable tension and an included angle. A plurality of groups of the first air float plate 18 can be arranged between the coating die and the air float roller 20 as needed.

[0059] The second air float plate 21 is arranged between the suspension oven 23 and the second coating die 15, supports the double-sided wet film entering the suspension oven 23, and attenuates the shaking transmitted from the inside of the suspension oven 23. The air float roller 20 is arranged behind the air float die, and is used to stably reverse the wet film after coating by 90° to 160° without contact, and can isolate the shaking transmitted from the suspension oven 23, so as to reduce the influence on the B-side coating. The shaking of the foil is reduced by the cooperation of the second air float plate 21 and the air float roller 20, so as to ensure the coating requirements and quality of the B-side.

[0060] Specifically, the air float roller 20, the first air float plate 18 and the second air float plate 21 are all made of porous medium material. The roller surface of the first air float plate 18 and the second air float plate 21 is arc-shaped.

[0061] Further, the thickness gauge includes a first thickness gauge 22 and a second thickness gauge 25. The first thickness gauge 22 is arranged on the front side of the suspension oven 23 and is used to measure the thickness of the wet film. The second thickness gauge 25 is arranged on the rear side of the suspension oven 23 and is used to measure the thickness of the dry film. The thickness of the wet film coated by the second die is further controlled in a closed loop by the cooperation of the two thickness gauges 22.

[0062] The adjusting mechanism 19 includes a second servo motor 191, a precision speed reducer 192 and a ball screw 193. The second coating die 15 is arranged above the ball screw 193. The second coating die 15 is adjusted in position by driving the ball screw 193 to move forward and backward by the second servo motor 191 and the precision speed reducer 192. The second coating die 15 can also be adjusted in forward and backward positions by a cylinder, an inclined block and the second servo motor 191.

[0063] In the specific application, when the distance between the lip of the second coating die 15 and the foil needs to be adjusted, the second coating die 15 is first moved horizontally to the left to the working position, and the first air float plate 18 is also moved horizontally to the right to the required position, and then the trial coating is performed. The thickness gauge 22 arranged on the front and rear sides of the suspension oven 23 is used to detect the wet film and the dry film, the air pressure of the lip strip 5 is adjusted according to the detection result, and the distance between the second coating die 15 and the foil and the misalignment distance between the upper and lower lips are adjusted through the precise adjustment mechanism 13, so that the requirements of different distances between the die lip and the front light foil are met through the cooperation of the two.

[0064] Example 3

[0065] Please refer to Figures 1-5 An air float die includes an upper die 1, a lower die 2, and a gasket 3 arranged between the upper die 1 and the lower die 2 to form a coating slit together with the upper die 1 and the lower die 2. The upper die 1 and the lower die 2 form a lip on the front side of the air float die for the slurry to flow out of the coating slit. Figure 10 The lip of the upper die 1 and the lip of the lower die 2 are both provided with a lip strip 5 to prevent the foil from contacting the lip. The lip strip 5 is arranged along the length direction of the lower die 2, and the surface of the lip strip 5 has air holes. The lip strip 5 and the side wall of the lip form a cavity. The rear side of the upper die 1 and the lower die 2 is provided with a precise adjustment mechanism 13 for driving the upper die 1 to move in the front-rear direction of the air float die to align or misalign the die lip of the upper die 1 and the die lip of the lower die 2. One side of the upper die 1 and the lower die 2 is provided with a gas source inlet connected with the cavity and used to connect a gas source. One side of the lower die 2 is provided with a gas pipe joint 4, and the gas source inlet is connected with the gas source through the gas pipe joint 4. The gas source is compressed air with a pressure of 0.2-0.8 MPa.

[0066] The lower die 2 is provided with a main gas flow channel 11 and a plurality of branch gas flow channels 12. The branch gas flow channels 12 are connected with the main gas flow channel 11, the gas source joint is connected with the main gas flow channel 11, and the cavity is connected with the branch gas flow channels 12. The compressed air can be uniformly delivered to the lip strip 5 through the main gas flow channel 11 and the branch gas flow channels 12, so as to form a stable and uniform air film on the surface of the lip.

[0067] In the present application, a lip strip 5 of porous medium material is inlaid at the lip port, so that the foil is prevented from contacting the lip port, and the distance between the lip port and the lip strip 5 is in the micron level. The physical parameters of the lip strip 5 above the lip port and the lip strip 5 below the lip port can be the same or different, and different heights of air film can be formed by adjusting the air inlet pressure of the air pipe joint 4 on the upper die head 1 and the air pipe joint 4 on the lower die head 2 to meet different coating requirements. The porous medium material can be porous graphite or porous metal alloy. The cross-sectional shape of the lip strip 5 is a sector, and the angle of the sector is 90°-180°. The actual shape can be set according to actual needs. Air inlets are provided on the sides of the upper die head 1 and the lower die head 2, and air pipe joints 4 are installed on the air inlets. The lip strip 5 and the side wall of the lip port form a cavity, which is connected to the air source through the air pipe joint 4. A plurality of gas flow channels are provided in the upper die head 1 and the lower die head 2, and compressed air can be uniformly delivered to the lip strip 5 through the air pipe joint 4, so that a stable and uniform air film in the micron level can be formed on the surface of the lip port, the foil passing through the lip port can be stably floated to avoid mechanical friction, and a stable distance in the micron level can be formed. The lip strip 5 can also be composed of a plate material with uniformly distributed and gas holes.

[0068] The precision adjustment mechanism 13 includes a displacement sensor 135, a coupling 133, a first servo motor 132, a differential screw 134, and a fixed seat 131. The fixed seat 131 is fixedly installed on the lower die head 2. The first servo motor 132 is connected to the fixed seat 131 through the coupling 133. One end of the differential screw 134 is connected to the first servo motor 132, and the other end passes through the fixed seat 131 and is connected to the upper die head 1. The upper die head 1 is pushed forward or pulled backward through the differential screw structure to form a composite distance with the lower die head 2. The displacement sensor 135 is arranged on the fixed seat 131 and is used to detect the displacement signal of the upper die head 1.

[0069] The rear ends of the upper die head 1 and the lower die head 2 are provided with fixed blocks 9. One side of the upper die head 1 and the lower die head 2 is provided with fixed blocks 9. The fixed blocks 9 are arranged on both sides of the rear end of the die head and are fixed on the die head through bolts. The fixed blocks 9 are used to fixedly connect the upper die head 1 and the lower die head 2. When the die head works, the upper die head 1 and the lower die head 2 are fixedly connected through the fixed blocks 9, so that the longitudinal or transverse relative movement of the two is prevented, and the precision of the length and width of the coating slit is improved.

[0070] The upper die head 1 and the lower die head 2 rear end are further provided with hinge supports 7 and turnover positioning blocks 10, the hinge supports 7 have two, the upper and lower die heads 2 are connected through the hinge supports 7, the upper die head 1 is conveniently turned over when cleaning, and the upper die head 1 is turned over along the hinge supports 7 after cleaning, so that the upper die head 1 is covered on the lower die head 2, and the turnover positioning blocks 10 are used for assisting the hinge supports 7 to turn over the die head.

[0071] The lower die head 2 rear end is provided with a feeding port communicated with the lower die head 2, and the lower die head 2 rear end is provided with a feeding mounting seat 8 communicated with the feeding port and used for connecting a feeding pipeline.

[0072] Specifically, the fixing blocks 9, the hinge supports 7 and the turnover positioning blocks 10 are fixedly connected through bolts. Further, a plurality of through holes in a row are formed in the front side of the upper end of the upper die head 1, a micrometer 6 is mounted in the through hole, a T block connected with the lower end of the micrometer 6 is arranged below the through hole, the size of the outlet slit is changed by controlling the up-down movement of the T block through adjusting the micrometer 6, so that the coating surface density is adjusted.

[0073] Please refer to Figures 11-13 A double-sided simultaneous coating equipment, comprising a first coating die head 14, a second coating die head 15, a coating steel roller 17, a rubber pressure roller 16, an air float roller 20, a first air float plate 18, a pair of second air float plates 21, a suspension oven 23, an adjusting mechanism 19 and a thickness gauge, wherein the second coating die head 15 adopts an air float die head, the first coating die head 14 is arranged opposite to the coating steel roller 17, the second air float plates 21 are arranged staggered between the suspension oven 23 and the second coating die head 15, the thickness gauges 22 are arranged on the front and back sides of the suspension oven 23 respectively, the first coating die head 15 forms an included angle with the horizontal plane, the included angle is 5°-45°, so as to ensure that the foil is stable enough during coating, and the adjusting mechanism 19 is arranged on the second coating die head 15 and used for adjusting the front and back positions of the second coating die head 15, so as to realize large-range and accurate adjustment of the distance between the lip and the foil.

[0074] The first air float plate 18 is arranged between the coating die and the air float roller 20, and is used to support the foil. The first air float plate 18 is provided with a plurality of nozzles on one side, so that gas enters the cavity from the plurality of nozzles to adjust the air pressure inside the first air float plate 18. The first air float plate 18 is provided with a displacement adjusting assembly 24, which includes a hand adjusting handle 241 and a lead screw 242. The lead screw 242 is slidably provided with a connecting seat at one end of which a connecting shaft is connected to the first air float plate 18. The hand adjusting handle 241 is arranged at one end of the lead screw 242. The first air float plate 18 is adjusted in left and right positions by the hand adjusting handle 241 and the lead screw 242, so as to ensure that the foil maintains stable tension and an included angle. A plurality of groups of the first air float plate 18 can be arranged between the coating die and the air float roller 20 as needed.

[0075] The second air float plate 21 is arranged between the suspension oven 23 and the second coating die 15, supports the double-sided wet film entering the suspension oven 23, and attenuates the shaking transmitted from the inside of the suspension oven 23. The air float roller 20 is arranged behind the air float die, and is used to stably reverse the wet film after coating by 90° to 160° without contact, and can isolate the shaking transmitted from the suspension oven 23, so as to reduce the influence on the B-side coating. The shaking of the foil is reduced by the cooperation of the second air float plate 21 and the air float roller 20, so as to ensure the coating requirements and quality of the B-side.

[0076] Specifically, the air float roller 20, the first air float plate 18 and the second air float plate 21 are all made of porous medium material. The roller surface of the first air float plate 18 and the second air float plate 21 is arc-shaped.

[0077] Further, the thickness gauge includes a first thickness gauge 22 and a second thickness gauge 25. The first thickness gauge 22 is arranged on the front side of the suspension oven 23 and is used to measure the thickness of the wet film. The second thickness gauge 25 is arranged on the rear side of the suspension oven 23 and is used to measure the thickness of the dry film. The thickness of the wet film coated by the second die is further controlled in a closed loop by the cooperation of the two thickness gauges 22.

[0078] The adjusting mechanism 19 includes a second servo motor 191, a precision speed reducer 192 and a ball screw 193. The second coating die 15 is arranged above the ball screw 193. The second coating die 15 is adjusted in position by driving the ball screw 193 to move forward and backward by the second servo motor 191 and the precision speed reducer 192. The second coating die 15 can also be adjusted in front and back positions by a cylinder, an inclined block and the second servo motor 191.

[0079] In the specific application, when the distance between the lip of the second coating die 15 and the foil needs to be adjusted, the second coating die 15 is first moved horizontally to the left to the working position, and the first air float plate 18 is also moved horizontally to the right to the required position, and then the trial coating is carried out. The wet film and the dry film are detected by the thickness gauge 22 arranged on the front and rear sides of the suspension oven 23. According to the detection result, the air pressure of the lip strip 5 is adjusted, and the distance between the second coating die 15 and the foil and the misalignment distance between the upper and lower lips are adjusted by the precision adjustment mechanism 13. Through the cooperation of the two, the requirement of different distances between the die lip and the front light foil is met.

[0080] Example 4

[0081] Please refer to Figure 1 An air float die includes an upper die 1, a lower die 2, and a gasket 3. The gasket 3 is arranged between the upper die 1 and the lower die 2 and surrounds the upper die 1 and the lower die 2 to form a coating slit. The upper die 1 and the lower die 2 form a lip on the front side of the air float die for the slurry to flow out of the coating slit. Please refer to Figures 6-10 The lip of the upper die 1 and the lip of the lower die 2 are both provided with a lip strip 5 to avoid contact between the foil and the lip. The lip strip 5 is arranged along the length direction of the lower die 2. The surface of the lip strip 5 has air holes. The lip strip 5 and the side wall of the lip form a cavity. The rear of the upper die 1 and the lower die 2 is provided with a precision adjustment mechanism 13. The precision adjustment mechanism 13 is used to drive the upper die 1 to move in the front-rear direction of the air float die to align or misalign the die lip of the upper die 1 and the die lip of the lower die 2. One side of the upper die 1 and the lower die 2 is provided with a gas source inlet. The gas source inlet is in communication with the cavity. The gas source inlet is used to connect the gas source. One side of the lower die 2 is provided with a gas pipe joint 4. The gas source inlet is connected to the gas source through the gas pipe joint 4. The gas source is compressed air with a pressure of 0.2 Mpa-0.8 Mpa.

[0082] The lower die 2 is provided with a main gas flow channel 11 and a plurality of branch gas flow channels 12. The branch gas flow channels 12 are in communication with the main gas flow channel 11. The gas source joint is in communication with the main gas flow channel 11. The cavity is in communication with the branch gas flow channels 12. The compressed air can be uniformly delivered to the lip strip 5 through the main gas flow channel 11 and the branch gas flow channels 12, so as to form a stable and uniform air film of micrometer level on the surface of the lip.

[0083] In the present application, a lip strip 5 made of porous medium material is inlaid at the lip port, so that the foil is prevented from contacting the lip port, and the distance between the lip port and the lip strip 5 is micron level, the physical parameters of the lip strip 5 above the lip port and the lip strip 5 below the lip port can be the same or different, and different height air films can be formed by adjusting the air inlet pressure of the air pipe joint 4 on the upper die head 1 and the air pipe joint 4 on the lower die head 2 to meet different coating requirements. The porous medium material can be porous graphite or porous metal alloy, the cross-sectional shape of the lip strip 5 is fan-shaped, the angle of the fan-shaped is 90°-180°, and the actual shape can be set according to actual needs. The upper die head 1 and the lower die head 2 are provided with air source inlets on the side edges, and the air pipe joint 4 is installed on the air source inlet. The lip strip 5 and the side wall of the lip port form a cavity, and the cavity is connected to the air source through the air pipe joint 4. A plurality of gas flow channels are arranged in the upper die head 1 and the lower die head 2, and compressed air can be uniformly delivered to the lip strip 5 through the air pipe joint 4, so that a stable and uniform air film with micron level can be formed on the surface of the lip port, the foil passing through the lip port can be stably floated to avoid mechanical friction, and a stable distance with micron level can be formed. The lip strip 5 can also be composed of a plate material with uniformly distributed and gas holes.

[0084] The precision adjustment mechanism 13 includes a displacement sensor 135, a differential screw 134 and a fixed seat 131. The fixed seat 131 is fixedly installed on the lower die head 2, the differential screw 134 is connected with the upper die head 1 through the fixed seat 131, and the upper die head 1 is pushed forward or pulled backward through the differential screw structure to form a composite distance required with the lower die head 2. The displacement sensor 135 is arranged on the fixed seat 131 and used for detecting the displacement signal of the upper die head 1.

[0085] The rear ends of the upper die head 1 and the lower die head 2 are provided with fixed blocks 9, and one side of the upper die head 1 and the lower die head 2 is provided with fixed blocks 9. The fixed blocks 9 are arranged on both sides of the rear end of the die head and fixed on the die head through bolts, and are used for fixedly connecting the upper die head 1 and the lower die head 2. When the die head works, the upper die head 1 and the lower die head 2 are fixedly connected through the fixed blocks 9, so that the longitudinal or transverse relative movement of the two is prevented, and the precision of the length and width of the coating slit is improved.

[0086] The rear ends of the upper die head 1 and the lower die head 2 are also provided with hinge supports 7 and turnover positioning blocks 10. The hinge supports 7 are two, and the upper die head 1 and the lower die head 2 are connected through the hinge supports 7. The upper die head 1 is conveniently turned over for cleaning, and after cleaning, the upper die head 1 is turned over along the hinge supports 7 again, so that the upper die head 1 is overlapped on the lower die head 2. The turnover positioning block 10 is used for assisting the hinge support 7 to turn over the die head.

[0087] The lower die head 2 rear end is provided with a feeding port communicated with the lower die head 2, and the lower die head 2 rear end is provided with a feeding mounting seat 8 communicated with the feeding port for connecting a feeding pipeline.

[0088] Specifically, the fixing block 9, the hinge support 7 and the overturning positioning block 10 are fixedly connected by bolts. Further, a plurality of through holes in a row are formed in the front side of the upper die head 1 upper end, and a micrometer 6 is mounted in the through holes. A T block connected with the lower end of the micrometer 6 is arranged below the through holes. By adjusting the micrometer 6, the T block is controlled to move up and down, the size of the outlet slit is changed, and the coating surface density is adjusted.

[0089] Please refer to Figures 11-13 A double-sided simultaneous coating equipment includes a first coating die head 14, a second coating die head 15, a coating steel roller 17, a glue pressing roller 16, an air floating roller 20, a first air floating plate 18, a pair of second air floating plates 21, a suspension oven 23, an adjusting mechanism 19 and a thickness gauge. The second coating die head 15 is an air floating die head. The first coating die head 14 is arranged opposite to the coating steel roller 17. The second air floating plates 21 are arranged staggered between the suspension oven 23 and the second coating die head 15. The thickness gauge 22 is arranged on the front and back sides of the suspension oven 23. The first coating die head 15 forms an angle with the horizontal plane, and the angle is 5°-45°, so as to ensure that the foil is stable enough during coating. The adjusting mechanism 19 is arranged on the second coating die head 15, and is used for adjusting the front and back positions of the second coating die head 15, so as to realize large-range and accurate adjustment of the distance between the lip and the foil.

[0090] The first air floating plate 18 is arranged between the coating die head and the air floating roller 20, and is used for supporting the foil. One side of the first air floating plate 18 is provided with a plurality of nozzles, so that gas enters the cavity from the plurality of nozzles, and the air pressure in the first air floating plate 18 is adjusted. The first air floating plate 18 is provided with a displacement adjusting assembly 24. The displacement adjusting assembly 24 includes a hand adjusting handle 241 and a lead screw 242. A connecting seat is slidably arranged in the lead screw 242. One end of the connecting seat is connected with the first air floating plate 18 through a connecting shaft. The hand adjusting handle 241 is arranged at one end of the lead screw 242. The first air floating plate 18 is adjusted in left and right positions through the hand adjusting handle 241 and the lead screw 242, so as to ensure that the foil maintains stable tension and angle. A plurality of groups of the first air floating plate 18 can be arranged between the coating die head and the air floating roller 20 according to needs.

[0091] The second air floating plate 21 is staggered between the suspension oven 23 and the second coating die 15, supports the double-sided wet film entering the suspension oven 23, and attenuates the shaking transmitted from the inside of the suspension oven 23. The air floating roller 20 is arranged behind the air floating die, and performs 90-160° non-contact stable reversing of the wet film after coating, and can isolate the shaking transmitted from the suspension oven 23, and reduce the influence on the B-side coating. Through the cooperation of the second air floating plate 21 and the air floating roller 20, the shaking of the foil is reduced, and the coating requirements and quality of the B-side are ensured.

[0092] Specifically, the air floating roller 20, the first air floating plate 18 and the second air floating plate 21 are all made of porous medium material, and the roller surfaces of the first air floating plate 18 and the second air floating plate 21 are arc-shaped.

[0093] Further, the thickness gauge includes a first thickness gauge 22 and a second thickness gauge 25. The first thickness gauge 22 is arranged at the front side of the suspension oven 23 for wet film thickness measurement, and the second thickness gauge 25 is arranged at the rear side of the suspension oven 23 for dry film thickness measurement. Through the cooperation of the two thickness gauges 22, further thickness closed-loop control of the wet film coated by the second die is realized.

[0094] The adjusting mechanism 19 includes a second servo motor 191, a precision speed reducer 192 and a ball screw 193. The second coating die 15 is arranged above the ball screw 193. The second servo motor 191 and the precision speed reducer 192 drive the ball screw 193 to move forward and backward, so as to adjust the position of the second coating die 15. The second coating die 15 can also be adjusted in the forward and backward positions by a cylinder, an inclined block and the second servo motor 191.

[0095] In specific application, when the distance between the lip of the second coating die 15 and the foil needs to be adjusted, the second coating die 15 is first moved horizontally to the left to the working position, and the first air floating plate 18 is also moved horizontally to the right to the required position. Then, trial coating is performed. The wet film and the dry film are detected by the thickness gauges 22 arranged at the front and rear sides of the suspension oven 23. According to the detection result, the air pressure of the lip 5 is adjusted, and the distance between the second coating die 15 and the foil and the misalignment distance between the upper and lower lips are adjusted by the precision adjusting mechanism 13. Through the cooperation of the two, the requirement of different distances between the die lip and the front light foil is met.

[0096] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the above-mentioned embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. An air flotation mold head, characterized in that, The device includes an upper die head, a lower die head, and a gasket. The gasket is disposed between the upper and lower die heads and forms a coating slit with them. The upper and lower die heads form a lip on the front side of the air-float die head for the slurry to flow out of the coating slit. A lip strip is provided at the lip of the lower die head, which is arranged along the length of the lower die head. The surface of the lip strip has air holes, and the lip strip and the side wall of the lip form a cavity. An air source inlet is provided on the side of the lower die head, which communicates with the cavity and is used to connect an air source. A precision adjustment mechanism is provided at the rear of the upper and lower die heads. The precision adjustment mechanism is used to drive the upper die head to move in the front-back direction of the air-float die head so that the die lips of the upper die head and the die lips of the lower die head are aligned or staggered. The lower die head is provided with a main gas flow channel and several branch gas flow channels. The branch gas flow channels are connected to the main gas flow channel. The gas source inlet is connected to the main gas flow channel. The cavity is connected to the branch gas flow channels.

2. The air-floating mold head according to claim 1, characterized in that, The precision adjustment mechanism includes a displacement sensor, a coupling, a first servo motor, a differential bolt, and a fixed base. The fixed base is fixedly installed on the lower die head. The servo motor is connected to the fixed base through the coupling. One end of the differential bolt is connected to the servo motor, and the other end passes through the fixed base and is connected to the upper die head. The displacement sensor is set on the fixed base and is used to detect the displacement signal of the upper die head.

3. The air-floating mold head according to claim 1, characterized in that, The precision adjustment mechanism includes a displacement sensor, a differential bolt, and a fixing seat. The fixing seat is fixedly installed on the lower die head, the differential bolt passes through the fixing seat and connects to the upper die head, and the displacement sensor is disposed on the fixing seat to detect the displacement signal of the upper die head.

4. The air-floating mold head according to claim 1, characterized in that, An air pipe connector is provided on one side of the lower die head. The air source inlet is connected to an air source through the air pipe connector. The air source is compressed air with a pressure of 0.2Mpa-0.8Mpa.

5. A double-sided simultaneous coating apparatus, comprising a first coating die, a second coating die, a coating steel roller, a pressure roller, an air flotation roller, a first air flotation plate, a pair of second air flotation plates, and a suspension oven, wherein the second air flotation plates are staggered between the suspension oven and the second coating die, characterized in that, It also includes an adjustment mechanism and a thickness gauge. The second coating die head adopts the air-floating die head as described in any one of claims 1-4. The thickness gauge is respectively disposed on the front and rear sides of the oven. The adjustment mechanism is disposed on the second coating die head and is used to adjust the front and rear position of the second coating die head.

6. The double-sided simultaneous coating equipment according to claim 5, characterized in that, The first coating die head forms an angle with the horizontal plane, and the degree of the angle is 5°~45°.

7. The double-sided simultaneous coating equipment according to claim 5, characterized in that, The first air flotation plate is equipped with a displacement adjustment component, which includes a manual adjustment handle and a lead screw. The manual adjustment handle is located at one end of the lead screw, and the left and right positions of the first air flotation plate are adjusted by the manual adjustment handle and the lead screw.

8. The double-sided simultaneous coating equipment according to claim 5, characterized in that, The adjustment mechanism includes a second servo motor, a precision reducer, and a ball screw. The second coating die head is positioned above the ball screw. The second servo motor and the precision reducer drive the ball screw to move back and forth, thereby adjusting the position of the second coating die head.

9. The double-sided simultaneous coating equipment according to claim 5, characterized in that, The thickness gauge includes a first thickness gauge and a second thickness gauge. The first thickness gauge is located on the front side of the oven for measuring the thickness of wet film, and the second thickness gauge is located on the rear side of the oven for measuring the thickness of dry film.

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