Diaphragm winding device capable of eliminating winding bottom wrinkles

Abstract

The invention relates to a diaphragm winding device capable of eliminating winding bottom wrinkles. The diaphragm winding device comprises a rotating tower. Two winding rotating units which are opposite to each other are arranged on the two sides of the rotating tower; a compression roller assembly is arranged beside the rotating tower; the compression roller assembly is close to one winding and rotating unit and can push a diaphragm flowing through the compression roller assembly so as to enable the diaphragm to be close to the tube core; the length of the cutting assembly is equal to the width of the diaphragm, and connecting plates connected with the cutting assembly are arranged at the two ends of the cutting assembly respectively; the connecting plate is connected with an inner plate of the rotating tower through a first air cylinder; the cutting assembly can move under the action of the first air cylinder and get close to the pipe core, static electricity is generated on the surface of the pipe core, the diaphragm is adsorbed and wound on the pipe core to form a winding bottom layer, and then the diaphragm is cut off to achieve short-distance belt cutting of the diaphragm. Therefore, adhesive such as double-faced adhesive tape can not be used on the winding pipe core any more, and the problem that wrinkles are generated on the winding bottom layer is effectively avoided.

Description

Technical Field

[0001] The present invention relates to industrial equipment, in particular to a winding device for lithium ion diaphragm production, in particular to a diaphragm winding device capable of eliminating bottom wrinkles during winding. Background Art

[0002] In the winding process of lithium-ion diaphragm production, a winding mechanism is usually set on the coating machine to wind the diaphragm onto the tube core.

[0003] At present, the winding mechanism mainly includes a turret, a rotating winding assembly and a cutter roller assembly, such as Figure 1 As shown. The turret is a cross-shaped frame with its central axis mounted horizontally on the base, allowing it to rotate vertically around the central axis. The rotary winding assembly comprises two groups, arranged opposite each other on the turret, each containing a tube core for winding the diaphragm. The cutter and roller assembly is arranged on one side of the turret and includes a cutter and a roller arranged parallel to each other. Each of these is controlled by a different cylinder, causing the roller to push the diaphragm closer to the tube core. Double-sided tape is pre-applied to the tube core so that the underlying diaphragm can adhere and be wound onto the tube core. Simultaneously, the cutter pushes out and cuts the diaphragm to form a new diaphragm roll. During operation, when the tube core in one set of rotary winding assemblies is wound, the turret rotates 180°, placing the other set of rotary winding assemblies closer to the cutter and roller assembly. The roller then pushes the diaphragm closer to the new tube core and cuts the diaphragm just as it is wound onto the new tube core.

[0004] However, the current winding operation has the following problems: 1) The cutter is controlled by a cylinder to move in a retractable motion. The film surface must be under tension to achieve successful cutting. If the tension value is too low or the film surface is loose, successful cutting cannot be achieved. 2) Since the existing mechanism requires the double-sided tape to be pasted on the winding tube core, the horizontal error when the pressure roller presses down will cause the film and the double-sided tape to form wrinkles and bulges, and then wrinkle stripes will appear on the bottom of the winding tube core, resulting in a waste of meters of diaphragm.

[0005] Therefore, it is in urgent need of improvement to better meet production needs. Summary of the Invention

[0006] The purpose of the present invention is to address the problems currently encountered in the diaphragm winding process and provide a diaphragm winding device that can eliminate bottom wrinkles when winding. It can effectively solve the problem of bottom wrinkles at the bottom of the winding, avoid waste of meters of diaphragm, and create favorable conditions for improving product quality and improving production efficiency.

[0007] The technical solution of the present invention is: A diaphragm winding device capable of eliminating wrinkles on the bottom of the winding film comprises a turret; two winding rotation units facing each other are provided on both sides of the turret; a tube core for winding the diaphragm is provided in the winding rotation unit; a pressure roller assembly is provided next to the turret; the pressure roller assembly is adjacent to one of the winding rotation units and can push the diaphragm flowing through to make it close to the tube core; and also includes a cutting assembly; the cutting assembly is in the shape of an elongated strip, the length of which is equivalent to the width of the diaphragm, and connecting plates connected thereto are provided at both ends of the cutting assembly; the connecting plate is connected to the inner plate of the turret through a first cylinder; the cutting assembly can move and approach the tube core under the action of the first cylinder, so that static electricity is generated on the surface of the tube core, the diaphragm is adsorbed and wound on the tube core to form a winding bottom layer, and then the diaphragm is cut to achieve short-distance slitting of the diaphragm.

[0008] Furthermore, the cutting assembly includes a cutter and an electrostatic generator; the cutter and the electrostatic generator are both in the shape of long strips, arranged at intervals in the upper and lower parts, and their two ends are respectively connected to the connecting plate.

[0009] Furthermore, the connecting plate is in an inverted L-shape, including a top plate and a vertical plate; both ends of the cutter are fixed on the top plate; and both ends of the electrostatic generator are fixed on the vertical plate.

[0010] Furthermore, it also includes a pressing plate; the pressing plate is flat, and its length and width are adapted to the cutter, and is fixed on the top surface of the cutter in the same direction to tighten the horizontal accuracy of the cutter.

[0011] Furthermore, the first cylinder is installed on the inner plate of the turret, and its stroke rod is connected to the vertical plate.

[0012] Furthermore, there are two first cylinders, each corresponding to a different connecting plate.

[0013] Furthermore, the tube core is made of stainless steel and has a smooth surface.

[0014] Furthermore, it also includes an approach roller assembly, which is arranged below the pressure roller assembly and can adjust the wrap angle of the diaphragm contacting the winding tube core.

[0015] Furthermore, the approach roller assembly includes a slide rail, a slider and an approach roller; the slider is installed in the slide rail through a screw rod; one end of the screw rod is connected to the motor, so that the slider can move along the slide rail under the drive of the motor; the approach roller is a straight roller, one end of which is connected to the slider and the other end is a suspended end, so that it can move with the slider and rotate around its central axis.

[0016] Furthermore, the motor is installed at the upper end of the slide rail.

[0017] Beneficial effects of the present invention: The present invention has a reasonable design, a simple structure and is easy to use. By adopting an electrostatic adsorption winding method, it avoids the use of double-sided tape for bonding and places the cutting position of the diaphragm close to the tube core, thereby effectively eliminating the problem of wrinkles at the bottom of the winding that is easily generated in the prior art, eliminating the waste of meters of diaphragm, and creating favorable conditions for improving product quality and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the prior art.

[0019] Figure 2 It is a schematic structural diagram of the cutting assembly of the present invention.

[0020] Figure 3 It is a schematic structural diagram of the approach roller assembly of the present invention.

[0021] Figure 4 Schematic diagram of the application state of the present invention (before the turret rotates).

[0022] Figure 5 Schematic diagram of the application state of the present invention (after the turret rotates).

[0023] Among them, 1-base; 2-cutting assembly; 201-first cylinder; 202-pressing plate; 203-cutter; 204-electrostatic generator; 205-connecting plate; 3-winding rotation unit; 4-support roller; 5-turret; 6-swing arm; 7-pressure roller; 8-diaphragm; 9-approach roller assembly; 901-slide rail; 902-motor; 903-screw; 904-slider; 905-approach roller; 10-second cylinder. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] like Figure 2-5 shown.

[0026] A diaphragm winding device capable of eliminating bottom wrinkles during winding comprises a turret 5, a winding rotation unit 3, a pressure roller assembly, a cutting assembly 2 and an approach roller assembly 9.

[0027] The turret, winding rotary unit, and pressure roller assembly are identical to those of the prior art. Specifically, the turret 5 is a cross-shaped structure, connected at its center to the base 1 and capable of vertical rotation about this connection. The turrets 5 are arranged in two sets, facing each other with a spacing commensurate with the width of the membrane to accommodate winding requirements. The winding rotary unit 3 includes two opposing chucks that clamp the membrane core between them. These chucks are located at one end of the turret and can rotate along their central axis, thereby rotating the core and winding it. The winding rotary unit 3 is arranged in two sets, one at each opposing end of the turret, with a 180° angle between them. Support rollers 4 are located at the other ends of the turret 5 to support the membrane during rotation, ensuring smooth membrane flow. The pressure roller assembly is located adjacent to the turret and includes a pressure roller 7 and a swing arm 6. The pressure rollers are arranged parallel to the winding rotary unit and connected to the swing arm. The swing arm 6 is connected to the stroke rod of the second cylinder 10, so that the swing arm can swing, thereby driving the pressure roller to move closer to or away from the winding rotation unit.

[0028] The cutting assembly 2 includes a connecting plate 205, a cutter 203, a pressing plate, an electrostatic generator 204, a first cylinder 201, and the like.

[0029] There are two connecting plates 205, both of which are inverted L-shaped short plates and are spaced apart from each other. Each connecting plate 205 is composed of a top plate and a vertical plate.

[0030] The cutter 203 is strip-shaped, with both ends of the cutter 203 respectively fixed on the top plate of one of the connecting plates, and the opening of the connecting plate faces the winding rotation unit.

[0031] The pressing plate 202 is in the shape of a flat plate, and its length and width are adapted to the cutter 203 , and is fixed on the top surface of the cutter 202 in the same direction to ensure the horizontal accuracy of the cutter.

[0032] The electrostatic generator 204 is in the shape of an elongated strip, with both ends of the electrostatic generator 204 connected to the vertical plates of the connecting plate 205 , and is located below the cutter 203 and spaced apart from the cutter 203 .

[0033] There are two first cylinders 201 installed on the inner plate of the turret and corresponding to the two connecting plates 205 respectively. Their travel rods are connected to the vertical plates so that the cutting assembly can be fixed on the turret and can drive the cutting assembly to move close to or away from the winding rotating assembly.

[0034] The tube core is made of stainless steel, has a smooth surface, and is not covered with double-sided tape or other adhesives. Therefore, when the static electricity generator approaches the tube core, static electricity is generated on the surface of the tube core, which adsorbs and wraps the diaphragm onto the tube core.

[0035] The approach roller assembly 9 includes a slide rail 901, a slider 904, and an approach roller 905. The slide rail 901 is linear, and a screw rod 903 is provided inside the slide rail 901 and is parallel to the screw rod 903. A motor 902 is provided at the upper end of the slide rail 901. The motor 902 is connected to one end of the screw rod 903. The slider 904 is connected to the slide rail 901 and is screwed to the screw rod 903, so that the slider 904 can move up and down along the slide rail 901 under the drive of the motor 902. The approach roller 905 is a straight roller, one end of which is connected to the slider 904 and the other end is suspended, so that it can move with the slider and rotate around its central axis.

[0036] The approach roller assembly 9 is arranged below the pressure roller assembly, so that the approach roller can push the diaphragm from top to bottom, and adjust the wrap angle of the diaphragm contacting the winding tube core by moving the slider, pre-flatten the membrane surface of the diaphragm, and ensure that the diaphragm is wound flatly onto the tube core.

[0037] The working process of the present invention is: First, the winding rotary unit B is used to rewind the machine. Figure 4 At this point, the pressure roller assembly does not contact the diaphragm. At the same time, the approach roller is in the upper position, making the wrap angle between the diaphragm and the winding core smaller, thereby reducing the pressure on the diaphragm.

[0038] When winding carousel B is nearing completion, the turret rotates 180° counterclockwise, swapping the positions of winding carousels A and B. The membrane is then supported by two support rollers to ensure smooth flow. At this point, winding carousel A rotates synchronously, lowering the approach roller to increase the wrap angle between the membrane and winding carousel A.

[0039] Then, the second cylinder is activated, and the pressure roller is moved downward through the action of the swing arm to push the diaphragm, so that the diaphragm is close to the tube core in the winding rotation unit A.

[0040] Then, the cutting assembly next to the winding rotating unit A starts to work. Specifically, the first cylinder is started, pushing the cutting assembly close to the tube core until the cutter contacts the diaphragm and cuts the diaphragm, and at the same time, the tube core generates static electricity, so that the diaphragm can be quickly and firmly adsorbed and wound on the tube core of the winding rotating unit A under the action of electrostatic attraction.

[0041] Therefore, since double-sided tape and other adhesives are no longer used on the tube core, the problem of wrinkles on the bottom layer of the winding is effectively avoided, the waste of meters of diaphragm is eliminated, and favorable conditions are created for improving product quality and improving production efficiency.

[0042] The parts not involved in the present invention are the same as the existing technology or can be implemented by using the existing technology.

Claims

1. A diaphragm winding device capable of eliminating bottom wrinkles during winding, comprising a turret; two opposing winding rotary units are provided on either side of the turret; a tube core for winding the diaphragm is provided in each of the winding rotary units; a pressure roller assembly is provided adjacent to the turret; the pressure roller assembly is adjacent to one of the winding rotary units and is capable of pushing the diaphragm flowing through the device toward the tube core; the device is characterized in that: It also includes a cutting assembly; the cutting assembly is in the shape of a long strip, the length of which is equivalent to the width of the diaphragm, and a connecting plate connected to it is provided at both ends; the connecting plate is connected to the inner plate of the turret through the first cylinder; the cutting assembly can move and approach the tube core under the action of the first cylinder, so that static electricity is generated on the surface of the tube core, the diaphragm is adsorbed and wound on the tube core to form a winding bottom layer, and then the diaphragm is cut to achieve short-distance diaphragm cutting.

2. The diaphragm winding device capable of eliminating bottom wrinkles when winding according to claim 1, characterized in that: The cutting assembly includes a cutter and an electrostatic generator; the cutter and the electrostatic generator are both in the shape of long strips, arranged at intervals in the upper and lower parts, and both ends of the cutter and the electrostatic generator are respectively connected to the connecting plate.

3. The diaphragm winding device capable of eliminating bottom wrinkles of winding according to claim 2, characterized in that: The connecting plate is in an inverted L-shape and includes a top plate and a vertical plate; both ends of the cutter are fixed on the top plate; and both ends of the electrostatic generator are fixed on the vertical plate.

4. The diaphragm winding device capable of eliminating bottom wrinkles when winding according to claim 3 is characterized in that: It also includes a pressing plate; the pressing plate is flat, its length and width are adapted to the cutter, and is fixed on the top surface of the cutter in the same direction to tighten the horizontal accuracy of the cutter.

5. The diaphragm winding device capable of eliminating bottom wrinkles when winding according to claim 3, characterized in that: The first cylinder is installed on the inner plate of the turret, and the travel rod of the first cylinder is connected to the vertical plate.

6. The diaphragm winding device capable of eliminating bottom wrinkles of winding according to claim 1, characterized in that: There are two first cylinders, each corresponding to a different connecting plate.

7. The diaphragm winding device capable of eliminating bottom wrinkles of winding according to claim 1, characterized in that: The tube core is made of stainless steel and has a smooth surface.

8. The diaphragm winding device capable of eliminating bottom wrinkles of winding according to claim 1, characterized in that: It also includes an approach roller assembly, which is arranged below the pressure roller assembly and can adjust the wrap angle of the diaphragm contacting the winding tube core.

9. The diaphragm winding device capable of eliminating bottom wrinkles of winding according to claim 8, characterized in that: The approach roller assembly includes a slide rail, a slider and an approach roller; the slider is installed in the slide rail through a screw rod; one end of the screw rod is connected to the motor, so that the slider can move along the slide rail under the drive of the motor; the approach roller is a straight roller, one end of which is connected to the slider and the other end is a suspended end, so that it can move with the slider and rotate around its central axis.

10. The diaphragm winding device capable of eliminating bottom wrinkles of winding according to claim 9, characterized in that: The motor is mounted on the upper end of the slide rail.

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