Intelligent coating system and method for diaphragm

Abstract

The invention relates to the technical field of lithium battery diaphragm coating processing, in particular to an intelligent diaphragm coating system and method.The intelligent diaphragm coating system is characterized in that an unwinding mechanism comprises two sets of unwinding rollers which are symmetrically arranged, a reel changing roller is arranged beside one unwinding roller, and the reel changing roller is arranged beside the other unwinding roller when the unwinding mechanism unwinds; the bonding layer of the base film on the roll changing roller is bonded to the outer side of the base film unwound on the adjacent unwinding roller, after the strip-shaped bumps are conveyed to the shearing roller along with the base film, the roller surface of the shearing roller is extruded through the strip-shaped bumps, the blade is exposed and used for cutting off the base film, and the two layers of different base films continue to be attached and conveyed in a rolling mode. Compared with a traditional semi-automatic or full-automatic roll changing mode, the roll changing device has the advantages that roll changing modules do not need to be arranged on the sides of the two sets of unwinding rollers, roll changing of the two sets of unwinding rollers is carried out separately, shutdown is not needed, and the phenomenon that due to roll changing, a poor composite section of hot-pressing composite of the same base layer is caused is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery diaphragm coating processing, and in particular to an intelligent coating system and method for a diaphragm. Background Art

[0002] Diaphragm coating is a precision industrial equipment used to evenly coat the surface of battery diaphragm substrates with a specific functional coating. Referring to the diaphragm coating machine widely used in industrial production, it includes a unwinding mechanism, a coating mechanism, a drying mechanism, and a winding mechanism connected in sequence. The unwinding / winding is driven by a servo motor. The coated substrate is cured in a hot air oven and then wound up. Among them, the feeding and rewinding of the diaphragm coating machine is one of the key links to achieve continuous production. The traditional manual reel changing has great deficiencies in reel changing time, base film loss length, coating defect rate at the seam and other reel changing performances. In this regard, in the prior art, a reel changing device and a coating machine disclosed in Chinese patent document CN119038264A are used to pull the head of the new roll material to the glue sticking component through a material belt traction mechanism, and then bond it to the On the working material strip, the tail of the working material strip is cut off by the strip cutting module to realize semi-automatic or fully automatic roll changing. Compared with the traditional manual roll changing, there is no need to stop the machine, and the roll changing performance is greatly optimized. However, for the coating of composite diaphragms with multi-layer base layers, such as a lithium battery composite diaphragm coating and recycling system disclosed in Chinese patent document CN108189430A, at least two sets of unwinding mechanisms are required. The two sets of unwound substrates are first hot-pressed and composited, and then coated. Taking into account the different unwinding speeds, tensions, and roll diameters of the two sets of different substrates, even if the two sets of unwinding mechanisms change the rolls at the same time, it is difficult to ensure that the material heads of the two sets of new rolls enter the hot-pressing composite at the same time, which is bound to cause poor composite sections of hot-pressing composites between the same base layers. Therefore, further optimization and improvement can be made. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to propose an intelligent coating system and method for diaphragms to solve the problem that it is difficult to ensure that the material heads of two groups of new coils enter the hot pressing composite at the same time during the existing composite diaphragm coating process, which will inevitably cause poor composite sections between the same base layers.

[0004] Based on the above objectives, the present invention provides an intelligent coating system for a diaphragm, comprising an unwinding mechanism, a coating mechanism, a drying mechanism, and a winding mechanism connected in sequence: The unwinding mechanism includes two sets of symmetrically arranged unwinding rollers, one of which is provided with a reel-changing roller. The reel-changing roller is wound with the same base film as that unwound by the opposite unwinding roller. The front end of the newly-rolled base film is provided with a strip-shaped bulge along its width direction, and the back of the strip-shaped bulge is provided with an adhesive layer. The front end of the coating mechanism is provided with a heat pressing roller arranged oppositely, and the front end of the heat pressing roller is provided with a shearing roller arranged oppositely. The roller surface of the shearing roller is made of elastic material, and a blade is embedded in the roller surface of the shearing roller. A plurality of blades are arranged at intervals around the outer circumference of the shearing roller. At the end of unwinding, the unwinding mechanism sticks the adhesive layer of the base film on the reel-changing roller to the outer side of the base film unwound on the adjacent unwinding roller. When the strip-shaped bulge is transferred to the shearing roller along with the base film, the strip-shaped bulge squeezes the roller surface of the shearing roller, so that the blade cuts the base film.

[0005] Preferably, a floating roller tension mechanism and a plurality of guide rollers are provided between the shearing roller and the unwinding mechanism.

[0006] Preferably, a laser thickness gauge is provided at the front end of the floating roller tension mechanism for real-time detection of the thickness of the base film. When the laser thickness gauge detects that the thickness of the base film is within a preset range, it triggers the corresponding unwinding roller to adaptively adjust the unwinding speed, and the thickness of the strip bulge exceeds the preset range.

[0007] Preferably, an infrared thermometer is provided at the rear end of the hot pressing roller for detecting the temperature of the base film in real time and triggering the corresponding unwinding roller to adaptively adjust the unwinding speed.

[0008] Preferably, the unwinding mechanism further comprises an orientation roller arranged at a fixed position, and one end of the roller shaft of the unwinding roller is connected to an elastic mechanism so that the base film unwound by the unwinding roller presses against the orientation roller for orientation unwinding.

[0009] Preferably, the length direction of the blade is parallel to the radial direction of the shearing roller.

[0010] Preferably, the adhesive layer is arranged along the width direction of the base film, and the width of the adhesive layer is greater than the width of the strip-shaped bulge.

[0011] Preferably, the adhesive layer on the newly rolled base film on the roll-changing roller is located on the inner side of the base film. When the unwinding roller located on the opposite side of the roll-changing roller changes the roll, the adhesive layer on the newly rolled base film is located on the outer side of the base film, which is used to stick to the outer side of the base film on the shearing roller.

[0012] The present invention also provides a method for intelligent coating of a diaphragm, comprising the following steps: The unwinding mechanism includes two groups of symmetrically arranged unwinding rollers, one of which is provided with a reel-changing roller. The reel-changing roller is wound with the same base film unwound from the opposite unwinding roller, and the front end of the newly-wound base film is provided with a strip-shaped bulge along its width direction, and the back of the strip-shaped bulge is provided with an adhesive layer. When in use, the base film unwound by the unwinding mechanism is guided by the shearing roller, hot-pressed and laminated by the hot-pressing roller, coated in the coating mechanism, dried in the drying mechanism, and then rewound to complete the processing; At the end of unwinding, the unwinding mechanism sticks the adhesive layer of the base film on the reel-changing roller to the outer side of the base film unwound on the adjacent unwinding roller, and the strip-shaped bulge is conveyed to the shearing roller along with the base film. The roller surface of the shearing roller is squeezed by the strip-shaped bulge, and the blade is exposed and used to cut the base film. The base film unwound by the unwinding roller on the opposite side of the reel-changing roller is cut, and the base film unwound by the unwinding roller on the adjacent side of the reel-changing roller continues to be bonded to the front end of the newly changed base film. From here on, the two layers of different base films are kept being fed by the laminating rollers, and then hot-pressed, compounded and coated, and the unwinding roller on the opposite side of the reel-changing roller is started to be changed.

[0013] Preferably, when the unwinding roller located on the opposite side of the reel-changing roller changes the roll, the adhesive layer on the newly changed base film is located on the outside of the base film. After the roll changing is completed, the adhesive layer on the newly changed base film is pasted to the outside of the base film on the shearing roller, and the roller surface of the shearing roller is squeezed by the strip-shaped bulge, and the blade is exposed and used to cut the base film. At this time, the tail material unwound by the unwinding roller located on the adjacent side of the reel-changing roller is cut off, and the base film unwound by the reel-changing roller continues to be bonded to the front end of the newly changed base film of the unwinding roller located on the opposite side of the reel-changing roller. Starting from here, the two layers of different base films are continued to be fed by the laminating rollers, and then hot-pressed, compounded and coated.

[0014] The beneficial effects of the present invention are as follows: the unwinding mechanism includes two groups of symmetrically arranged unwinding rollers, one of which is provided with a reel-changing roller next to which the same base film unwound from the opposite unwinding roller is wound, and the front end of the newly-wound base film is provided with a strip-shaped bulge along its width direction, and the back of the strip-shaped bulge is provided with an adhesive layer. When in use, the base film unwound by the unwinding mechanism is sequentially guided by the shearing roller, hot-pressed and laminated by the hot-pressing roller, coated in the coating mechanism, dried in the drying mechanism, and then rewound to complete the processing; At the end of unwinding, the unwinding mechanism sticks the adhesive layer of the base film on the reel-changing roller to the outer side of the base film unwound on the adjacent unwinding roller, and the strip-shaped bulge is conveyed to the shear roller along with the base film. The strip-shaped bulge squeezes the roller surface of the shear roller, and the blade is exposed and used to cut the base film. The base film unwound by the unwinding roller on the opposite side of the reel-changing roller is cut, and the base film unwound by the unwinding roller on the adjacent side of the reel-changing roller continues to be bonded to the front end of the newly changed base film. From here on, the two layers of different base films are kept being fed to the laminating roller, and then hot-pressed, composited and coated, and the unwinding roller on the opposite side of the reel-changing roller is started to be changed. Therefore, compared with the traditional semi-automatic or fully automatic reel-changing method, first of all, there is no need to equip the sides of the two sets of unwinding rollers with reel-changing modules. The two sets of reels are changed separately without stopping the machine, and the two layers of different base films are always kept being fed to the hot pressing roller for hot pressing and composite. The problem of reel changing will not cause poor composite sections of the same base layer hot pressing composite, and the composite defect rate is close to zero. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 Schematic diagram of the overall structure of the coating system with directional rollers and elastic mechanism of the present invention; Figure 2 This is a schematic diagram of the overall structure of the coating system of the present invention without the directional roller and the elastic mechanism; Figure 3 It is a structural schematic diagram of the roll-changing roller and the unwinding mechanism of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of point A in the middle; Figure 5 It is a structural schematic diagram of the adhesive layer of the base film on the reel-changing roller of the present invention being adhered to the outer side of the base film unwound on the adjacent unwinding roller; Figure 6 For the present invention Figure 5 A magnified schematic diagram of point B in the middle; Figure 7 It is a structural schematic diagram of the strip-shaped bulge of the present invention when it is transferred to the shearing roller along with the newly rolled base film of the roll-changing roller; Figure 8 For the present invention Figure 7 Enlarged schematic diagram of point C in the middle; Figure 9 It is a schematic structural diagram of the unwinding roller located on the opposite side of the reel-changing roller during reel changing of the present invention; Figure 10 For the present invention Figure 9 The enlarged schematic diagram of point D in the middle; Figure 11 This is a schematic structural diagram of the present invention when the adhesive layer on the newly wound base film of the unwinding roller located on the opposite side of the winding roller is adhered to the outer side of the base film on the shearing roller; Figure 12 For the present invention Figure 11 Enlarged schematic diagram of point E in the middle.

[0017] The following are marked in the figure: 100, unwinding mechanism; 200, coating mechanism; 300, drying mechanism; 1, unwinding roller; 2, reel-changing roller; 3, base film; 31, strip-shaped bulge; 32, adhesive layer; 4, hot pressing roller; 5, shearing roller; 51, blade; 6, floating roller tension mechanism; 7, guide roller; 8, guide roller; 9, laser thickness gauge; 10, infrared thermometer; 11, orientation roller; 12, elastic mechanism. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0020] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 As shown, an intelligent coating system for a diaphragm includes an unwinding mechanism 100, a coating mechanism 200, a drying mechanism 300, and a winding mechanism connected in sequence. The unwinding mechanism 100 includes two sets of symmetrically arranged unwinding rollers 1, one of which is provided with a roll-changing roller 2 on the side thereof. The roll-changing roller 2 is wound with the same base film 3 unwound on the unwinding roller 1 opposite thereto. The front end of the newly-wound base film 3 is provided with a strip-shaped bulge 31 along its width direction, and the back of the strip-shaped bulge 31 is provided with an adhesive layer 32. The front end of the coating mechanism 200 is provided with a relatively arranged The hot pressing roller 4 has a shearing roller 5 arranged opposite to it at the front end thereof, and the roller surface of the shearing roller 5 is made of elastic material, and a blade 51 is embedded in the roller surface of the shearing roller 5. A plurality of blades 51 are arranged at intervals around the outer periphery of the shearing roller 5. At the end of the unwinding of the unwinding mechanism 100, the adhesive layer 32 of the base film 3 on the reel-changing roller 2 is pasted on the outer side of the base film 3 unwound on the adjacent unwinding roller 1. When the strip-shaped bulge 31 is conveyed to the shearing roller 5 along with the base film 3, the roller surface of the shearing roller 5 is squeezed by the strip-shaped bulge 31, so that the blade 51 cuts the base film 3.

[0021] The present invention is based on the structural principle of an existing conventional diaphragm coating machine, and includes an unwinding mechanism 100, a coating mechanism 200, a drying mechanism 300, and a winding mechanism connected in sequence. The coating mechanism 200 adopts an existing conventional continuous coating module, and the drying mechanism 300 adopts an existing conventional multi-section circulating hot air drying module. The unwinding mechanism 100 includes two groups of symmetrically arranged unwinding rollers 1. The speed of the unwinding rollers 1 can be controlled by a servo motor. The two groups of symmetrically designed unwinding rollers 1 are respectively wound with base films 3, that is, they are respectively used to unwind two groups of base films 3. For different base films 3, the unwinding speed of the unwinding roller 1 is adaptively controlled by adjusting the torque / speed of the servo motor to achieve a preset tension value for a specific base film 3, thereby maintaining long-term tension stability, thereby performing efficient and stable coating operations. During use, according to the requirements of the lithium battery diaphragm structure, a single set of unwinding rollers 1 working mode can be adopted, that is, a single-layer diaphragm structure, or a two-set unwinding roller 1 working mode can be adopted. In the two-set unwinding roller 1 working mode, a multi-layer base film 3 with the same substrate structure can be used for compounding, or a multi-layer base film 3 with different substrate structures can be used for compounding. For example, the double-layer composite diaphragm commonly used in the existing power lithium-ion battery field includes a single-layer polyethylene (PE) and polypropylene (PP) film. In particular, a reel 2 is provided on the side of one of the unwinding rollers 1, and the reel 2 is wound with the same base film 3 unwound from the unwinding roller 1 opposite to it, and the front end of the newly-rewound base film 3 is provided with a strip-shaped bulge 31 along its width direction, as shown in FIG. Figure 4 As shown, the strip-shaped bulge 31 can be designed in a semi-cylindrical shape, and the interior can be filled with a gas such as air. The back of the strip-shaped bulge 31 is provided with an adhesive layer 32, and the adhesive layer 32 can adopt an existing conventional viscose structure used for diaphragm bonding. The front end of the coating mechanism 200 is provided with a relatively set hot pressing roller 4, and the front end of the hot pressing roller 4 is provided with a relatively set shearing roller 5, so that the base film 3 unwound by the unwinding mechanism 100 is sequentially guided by the shearing roller 5, hot-pressed and compounded by the hot pressing roller 4, coated in the coating mechanism 200, dried in the drying mechanism 300, and then rewound to complete the processing. The roller surface of the shearing roller 5 is made of elastic material, which can be specifically made of existing conventional materials such as polyurethane, rubber, polyethylene, etc., with good wear resistance and elasticity. A blade 51 is embedded in the roller surface of the shearing roller 5. Specifically, as shown in FIG. Figure 8 As shown, the length direction of the blade 51 is parallel to the radial direction of the shear roller 5, the inner end of the blade 51 is fixedly connected to the internal hard roller of the shear roller 5, the outer end of the blade 51 is sharpened and initially hidden in the roller surface, and a plurality of blades 51 are arranged at intervals around the outer circumference of the shear roller 5. At the end of the unwinding of the unwinding mechanism 100, that is, when the roll needs to be changed, Figure 5 、 Figure 6 As shown, by pasting the adhesive layer 32 of the base film 3 on the reel-changing roller 2 to the outer side of the base film 3 unwound on the adjacent unwinding roller 1, the other set of unwinding rollers 1 is ignored at this time, and when the strip-shaped bulge 31 is transferred to the shearing roller 5 along with the base film 3, as shown in FIG. Figure 7 、 Figure 8 As shown, the roller surface of the shear roller 5 is squeezed by the strip-shaped bulge 31. At this time, due to the strip-shaped bulge 31 squeezing the roller surface of the shear roller 5, the blade 51 is exposed and used to cut the base film 3. Specifically, another set of unwinding rollers 1 ( Figure 7 The base film 3 unwound by the unwinding roller 1 in the middle and lower part is cut off and will not continue to participate in the hot pressing and coating. Then the strip bulge 31 will also be punctured, and the unwinding roller 1 ( Figure 7 The base film 3 unwound on the unwinding roller 1 in the middle and upper part is cut by the blade 51, because the cutting position is located on the adhesive layer 32, and the adhesive layer 32 is not cut due to the thickening treatment, so the adjacent unwinding roller 1 ( Figure 7 The base film 3 unwound on the unwinding roller 1 in the middle and upper part continues to be bonded to the front end of the newly wound base film 3, so that from here on, the two layers of different base films 3 are continued to be fed by the rollers, and then hot-pressed, laminated and coated, while the other set of unwinding rollers 1 ( Figure 7 The unwinding roller 1 in the middle and lower part can be used for the roll changing operation, and the same base film 3 unwound on the unwinding roller 1 opposite to it can be replaced, that is, different base films 3 are unwound on the upper and lower parts. Figure 3 、 Figure 4 As shown, the adhesive layer 32 on the newly rolled base film 3 on the roll-changing roller 2 is located on the inner side of the base film 3, as shown in FIG. Figure 9 、 Figure 10 As shown, when the unwinding roller 1 on the opposite side of the rewinding roller 2 is rewound, the adhesive layer 32 on the newly rewound base film 3 is located on the outside of the base film 3, so that the other set of unwinding rollers 1 to be cut ( Figure 9 After the unwinding roller 1 in the middle and lower part has finished changing the roll, the adhesive layer 32 on the newly changed base film 3 is pasted to the outer side of the base film 3 on the shearing roller 5, as shown in FIG. Figure 11 、 Figure 12 As shown, at this time, the strip-shaped bulge 31 squeezes the roller surface of the shear roller 5, and the blade 51 is exposed and used to cut the base film 3, so that the unwinding roller 1 ( Figure 11 The tail material unwound by the unwinding roller 1 in the middle upper part is cut off and the strip bulge 31 is punctured at the same time, while the base film 3 unwound by the reel-changing roller 2 continues to rewind with the unwinding roller 1 on the opposite side of the reel-changing roller 2. Figure 11 The front end of the newly rolled base film 3 of the unwinding roller 1 in the middle lower part remains bonded, so starting from here, the two layers of different base films 3 continue to be fed by the laminating rollers, and then hot-pressed, composited and coated, and the cut tail materials can be recycled. Therefore, compared with the traditional semi-automatic or fully automatic roll changing method, first of all, there is no need to equip the sides of the two sets of unwinding rollers 1 with roll changing modules. The two sets of roll changing are carried out separately without stopping the machine, and the two layers of different base films 3 are always fed by the laminating rollers to the hot pressing roller 4 for hot pressing and composite. The problem of roll changing will not lead to poor composite sections of the same base layer hot pressing and composite, and the composite defect rate is close to zero.

[0022] Among them, the strip-shaped bulge 31 will be punctured when passing through the shear roller 5, which will not affect the subsequent stable roller feeding and hot pressing compounding. The adhesive layer 32 can be marked, and the adhesive layer 32 and the strip-shaped bulge 31 are in the same position, which is convenient for subsequent identification or cutting and removal, and the defective rate is close to zero.

[0023] Among them, a scraper can be provided above the rear end of the shearing roller 5, which is used to scrape the base film 3 above the rear end of the shearing roller 5, so as to block the cut tailings until the tailings are completely collected and recovered along the front end of the scraper. The cut tailings can also be manually pulled out directly at the front end of the shearing roller 5, and collected and recovered.

[0024] Among them, since the upper and lower positions of the base film 3 change after the roll is changed, and the coating mechanism 200 coats the front and back of the double-layer composite diaphragm, based on the existing conventional diaphragm coating machine, and according to the functional requirements and actual application scenario requirements of the diaphragm product, a symmetrical coating process with consistent front and back can be adopted, that is, the upper and lower front and back of the composite diaphragm are not distinguished during coating, or asymmetric coating with differentiated functions can be adopted. In this regard, preferably, marking or color marking can be performed on the adhesive layer 32 to facilitate identification before coating. At the same time, the coating machine adopts the existing double-sided independent feeding system to realize automatic and flexible adjustment of the coating components according to the identification results before coating to complete asymmetric coating.

[0025] Among them, the function of the relatively arranged shearing rollers 5 is mainly to guide and shear the base film 3, rather than to replace the hot pressing roller 4 to clamp and roll the base film 3. Therefore, the spacing between the relatively arranged shearing rollers 5 can be slightly larger than the thickness of the double-layer base film 3, and smaller than the thickness of the strip bulge 31. Therefore, the strip bulge 31 will be punctured when passing through the shearing roller 5, and the corresponding base film 3 will be cut off at the same time, and the head end of the cut base film 3 will not be clamped and transported by the shearing roller 5, so that it will automatically detach from the shearing roller 5 under the action of its own weight, or it will be convenient for manual peeling.

[0026] In an embodiment of the present invention, optionally, Figure 2 As shown, a floating roller tension mechanism 6 and a plurality of guide rollers 7 are provided between the shearing roller 5 and the unwinding mechanism 100. Like the unwinding mechanism 100, the floating roller tension mechanism 6 and the plurality of guide rollers 7 are also symmetrically arranged in two groups. The plurality of guide rollers 7 are used for directional roller feeding of the base film 3. The floating roller tension mechanism 6 can adopt an existing conventional roller tension automatic control system. During the winding process, in order to ensure the surface quality of the base film 3 and buffer the sudden change in tension, the floating roller tension mechanism 6 has a certain stroke (for example, 100-300 mm) and is equipped with pneumatic / hydraulic damping, that is, as a physical buffer, it generates a damping force through an air pressure / hydraulic cylinder to directly absorb the sudden change in tension, has a fast response speed, and can buffer most instantaneous tension shocks. Thus, it cooperates with the unwinding speed of the unwinding mechanism 100 to coordinate the tension of the base film 3.

[0027] The front ends of the coating mechanism 200 and the drying mechanism 300 may be provided with guide rollers 8 for directional guidance during coating / drying operations.

[0028] In an embodiment of the present invention, optionally, Figure 2 As shown, a laser thickness gauge 9 is provided at the front end of the floating roller tension mechanism 6, which generally adopts a method of two laser displacement sensors shooting up and down. The two upper and lower sensors respectively measure the position of the upper surface and the lower surface of the object to be measured, and obtain the thickness of the object to be measured by calculation, which is used to detect the thickness of the base film 3 in real time. When the laser thickness gauge 9 detects that the thickness of the base film 3 is within a preset range, it triggers the corresponding unwinding roller 1 to adaptively adjust the unwinding speed, that is, it triggers the unwinding mechanism 100 to make tension compensation and correct the servo motor torque / speed. Among them, the thickness of the strip bulge 31 exceeds the preset range. Considering that the strip bulge 31 is attached to the base film 3 with a very narrow width and will be punctured by the shear roller 5 soon, it has little effect on the tension, thereby avoiding excessive correction of the compensation tension due to detection of the strip bulge 31.

[0029] In an embodiment of the present invention, optionally, Figure 2 As shown, an infrared thermometer 10 is provided at the rear end of the hot pressing roller 4. The infrared thermometer 10 is an existing conventional device for temperature measurement, which is used to detect the temperature of the base film 3 in real time. Similarly, through the real-time feedback of the detected temperature, the corresponding unwinding roller 1 is triggered to adaptively adjust the unwinding speed, that is, the unwinding mechanism 100 is triggered to make tension compensation and correct the servo motor torque / speed.

[0030] In addition, a tension sensor (which may be of the existing conventional strain gauge type / floating roller type) may be provided at the front end of the coating mechanism 200. The sensor has a fast response speed and is used to detect and feedback the tension changes of the base film 3 in real time, triggering the unwinding mechanism 100 to make tension compensation and correct the servo motor torque / speed in real time.

[0031] In an embodiment of the present invention, optionally, Figure 1 As shown, the unwinding mechanism 100 also includes a directional roller 11 set in a fixed position, and one end of the roller shaft of the unwinding roller 1 is connected to an elastic mechanism 12, so that the base film 3 unwound by the unwinding roller 1 is pressed against the directional roller 11 for directional unwinding, thereby avoiding the tension of the base film 3 being affected by the change in the unwinding diameter of the unwinding roller 1, and when the reel-changing roller 2 is changed, the newly-changed base film 3 is sent along the directional roller 11, which is also conducive to tension stability. When the unwinding roller 1 itself is changed, the unwinding roller 1 can be manually pulled out and the elastic mechanism 12 can be compressed to change the roll. When changing the roll, the unwinding speed of the corresponding unwinding mechanism 100 can be synchronously adjusted to correspond to the preset tension values ​​of different base films 3.

[0032] In an embodiment of the present invention, optionally, Figure 3 、 Figure 4As shown, the adhesive layer 32 is arranged along the width direction of the base film 3, and the width of the adhesive layer 32 is greater than the width of the strip-shaped bulge 31. On the one hand, this is beneficial to the stable bonding of the base film 3. On the other hand, when the shearing roller 5 cuts the base film 3, it is beneficial to the stable bonding of part of the base film 3 on the adhesive layer 32.

[0033] The present invention also provides a method for intelligent coating of a diaphragm, comprising the following steps: The unwinding mechanism 100 includes two sets of symmetrically arranged unwinding rollers 1, with a reel-changing roller 2 provided next to one of the unwinding rollers 1. The reel-changing roller 2 is wound with the same base film 3 unwound from the opposite unwinding roller 1, and the front end of the newly-wound base film 3 is provided with a strip-shaped bulge 31 along its width direction, and the back of the strip-shaped bulge 31 is provided with an adhesive layer 32. When in use, the base film 3 unwound by the unwinding mechanism 100 is guided by the shearing roller 5, hot-pressed and laminated by the hot-pressing roller 4, coated in the coating mechanism 200, dried in the drying mechanism 300, and then rewound to complete the processing; At the end of unwinding, the unwinding mechanism 100 sticks the adhesive layer 32 of the base film 3 on the reel-changing roller 2 to the outer side of the base film 3 unwound on the adjacent unwinding roller 1, and the strip-shaped bulge 31 is conveyed to the shearing roller 5 along with the base film 3. The roller surface of the shearing roller 5 is squeezed by the strip-shaped bulge 31, and the blade 51 is exposed and used to cut the base film 3. The base film 3 unwound by the unwinding roller 1 on the opposite side of the reel-changing roller 2 is cut, and the base film 3 unwound by the unwinding roller 1 on the adjacent side of the reel-changing roller 2 continues to be bonded to the front end of the newly-rewound base film 3. From here on, the two layers of different base films 3 are kept being fed together, and then hot-pressed, compounded and coated, and the rewinding roller 1 on the opposite side of the reel-changing roller 2 is started to be changed.

[0034] More preferably, when the unwinding roller 1 located on the opposite side of the reel-changing roller 2 is changed, the adhesive layer 32 on the newly changed base film 3 is located on the outside of the base film 3. After the rewinding is completed, the adhesive layer 32 on the newly changed base film 3 is pasted to the outside of the base film 3 on the shearing roller 5. The roller surface of the shearing roller 5 is squeezed by the strip-shaped bulge 31, and the blade 51 is exposed and used to cut the base film 3. At this time, the tail material unwound by the unwinding roller 1 located on the adjacent side of the reel-changing roller 2 is cut off, while the base film 3 unwound by the reel-changing roller 2 continues to be bonded to the front end of the newly changed base film 3 of the unwinding roller 1 located on the opposite side of the reel-changing roller 2. Starting from here, the two layers of different base films 3 are continued to be rolled together, and then hot-pressed, compounded and coated.

[0035] At the end of the next unwinding mechanism 100 unwinding, the unwinding roller 1 adjacent to the changing roller 2 is first replaced, and the adhesive layer 32 of the new roll is pasted on the base film 3 unwound by the changing roller 2. Compared with the above process, the roles of the changing roller 2 and its adjacent unwinding roller 1 are swapped. After the replacement, the unwinding roller 1 on the opposite side of the changing roller 2 can be replaced in the same way.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

Claims

1. An intelligent coating system for a diaphragm, comprising an unwinding mechanism (100), a coating mechanism (200), a drying mechanism (300), and a winding mechanism connected in sequence, characterized in that: The unwinding mechanism (100) comprises two groups of symmetrically arranged unwinding rollers (1), a rewinding roller (2) is provided on the side of one of the unwinding rollers (1), the rewinding roller (2) is wound with the same base film (3) unwound on the unwinding roller (1) opposite to it, the front end of the newly rewound base film (3) is provided with a strip-shaped bulge (31) along its width direction, and the back side of the strip-shaped bulge (31) is provided with an adhesive layer (32); The front end of the coating mechanism (200) is provided with a heat-pressing roller (4) arranged opposite to each other, and the front end of the heat-pressing roller (4) is provided with a shearing roller (5) arranged opposite to each other, the roller surface of the shearing roller (5) is made of elastic material, a blade (51) is embedded in the roller surface of the shearing roller (5), and a plurality of blades (51) are arranged at intervals around the outer circumference of the shearing roller (5); At the end of the unwinding process of the unwinding mechanism (100), the adhesive layer (32) of the base film (3) on the reel-changing roller (2) is adhered to the outer side of the base film (3) unwound on the adjacent unwinding roller (1). When the strip-shaped bulge (31) is transferred to the shearing roller (5) along with the base film (3), the strip-shaped bulge (31) squeezes the roller surface of the shearing roller (5) so that the blade (51) cuts the base film (3).

2. The intelligent coating system for a diaphragm according to claim 1, characterized in that: A floating roller tension mechanism (6) and a plurality of guide rollers (7) are provided between the shearing roller (5) and the unwinding mechanism (100).

3. The intelligent coating system for a diaphragm according to claim 2, characterized in that: A laser thickness gauge (9) is provided at the front end of the floating roller tension mechanism (6) for detecting the thickness of the base film (3) in real time. When the laser thickness gauge (9) detects that the thickness of the base film (3) is within a preset range, the corresponding unwinding roller (1) is triggered to adaptively adjust the unwinding speed, and the thickness of the strip-shaped bulge (31) exceeds the preset range.

4. The intelligent coating system for a diaphragm according to claim 1, characterized in that: The rear end of the hot pressing roller (4) is provided with an infrared thermometer (10) for detecting the temperature of the base film (3) in real time and triggering the corresponding unwinding roller (1) to adaptively adjust the unwinding speed.

5. The intelligent coating system for a diaphragm according to claim 1, characterized in that: The unwinding mechanism (100) further comprises a directional roller (11) arranged at a fixed position, and one end of the roller shaft of the unwinding roller (1) is connected to an elastic mechanism (12) so that the base film (3) unwound by the unwinding roller (1) abuts against the directional roller (11) for directional unwinding.

6. The intelligent coating system for a diaphragm according to claim 1, characterized in that: The length direction of the blade (51) is parallel to the radial direction of the shearing roller (5).

7. The intelligent coating system for a diaphragm according to claim 1, characterized in that: The adhesive layer (32) is arranged along the width direction of the base film (3), and the width of the adhesive layer (32) is greater than the width of the strip-shaped bulge (31).

8. The intelligent coating system for a diaphragm according to claim 1, characterized in that: The adhesive layer (32) on the newly rolled base film (3) on the roll-changing roller (2) is located on the inner side of the base film (3); when the unwinding roller (1) located on the opposite side of the roll-changing roller (2) changes the roll, the adhesive layer (32) on the newly rolled base film (3) is located on the outer side of the base film (3) and is used to stick to the outer side of the base film (3) on the shearing roller (5).

9. A method for intelligent coating of a diaphragm, wherein the method adopts the intelligent coating system device of any one of claims 1 to 8 for coating, characterized in that: The following steps are involved: The unwinding mechanism (100) includes two groups of symmetrically arranged unwinding rollers (1), one of the unwinding rollers (1) is provided with a rewinding roller (2) on the side thereof, the rewinding roller (2) is wound with the same base film (3) unwound from the unwinding roller (1) opposite thereto, and the front end of the newly rewound base film (3) is provided with a strip-shaped bulge (31) along its width direction, and the back side of the strip-shaped bulge (31) is provided with an adhesive layer (32). When in use, the base film (3) unwound by the unwinding mechanism (100) is guided by the shearing roller (5), heat-pressed and laminated by the hot pressing roller (4), coated in the coating mechanism (200), dried in the drying mechanism (300), and then rewound to complete the processing; At the end of the unwinding process of the unwinding mechanism (100), the adhesive layer (32) of the base film (3) on the reel-changing roller (2) is pasted on the outer side of the base film (3) unwound on the adjacent unwinding roller (1), and the strip-shaped bulge (31) is conveyed to the shearing roller (5) along with the base film (3). The roller surface of the shearing roller (5) is squeezed by the strip-shaped bulge (31), and the blade (51) is exposed and used to cut the base film (3). The base film (3) unwound by the unwinding roller (1) on the opposite side of the reel-changing roller (2) is cut, and the base film (3) unwound by the unwinding roller (1) on the adjacent side of the reel-changing roller (2) continues to be bonded to the front end of the newly rewound base film (3). From this point on, the two layers of different base films (3) are continuously fed together, and then hot-pressed, laminated and coated, and the rewinding of the unwinding roller (1) on the opposite side of the reel-changing roller (2) begins.

10. The intelligent coating method for a diaphragm according to claim 9, characterized in that: When the unwinding roller (1) located on the opposite side of the reel-changing roller (2) is rewound, the adhesive layer (32) on the newly rewound base film (3) is located on the outside of the base film (3). After the rewinding is completed, the adhesive layer (32) on the newly rewound base film (3) is pasted to the outside of the base film (3) on the shearing roller (5). The roller surface of the shearing roller (5) is squeezed by the strip-shaped bulge (31), and the blade (51) is exposed and used to cut the base film (3). At this time, the tail material unwound by the unwinding roller (1) located on the adjacent side of the reel-changing roller (2) is cut off, while the base film (3) unwound by the reel-changing roller (2) continues to be bonded to the front end of the newly rewound base film (3) of the unwinding roller (1) located on the opposite side of the reel-changing roller (2). From here on, the two layers of different base films (3) are continuously fed together, and then hot-pressed, laminated and coated.

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