WO2018018460A1

WO2018018460A1 - Calendering apparatus with multiple rollers

Info

Publication number: WO2018018460A1
Application number: PCT/CN2016/091869
Authority: WO
Inventors: 张祥领
Original assignee: 广东基泰智能设备有限公司
Priority date: 2016-07-25
Filing date: 2016-07-27
Publication date: 2018-02-01
Also published as: CN106180189A; CN106180189B

Abstract

Disclosed is a calendering apparatus with multiple rollers, the calendering apparatus comprising a pressurizing mechanism (7), a clearance fine-adjustment mechanism (8), a first pressurizing roller (3), a second pressurizing roller (4), and a first calendering roller (5) and a second calendering roller (6) located between the first pressurizing roller (3) and the second pressurizing roller (4). The first pressurizing roller (3) drives the first calendering roller (5) to rotate, the second pressurizing roller (4) drives the second calendering roller (6) to rotate, the pressurizing mechanism (7) pressurizes the first pressurizing roller (3), and the clearance fine-adjustment mechanism (8) is located between the first pressurizing roller (3) and the second pressurizing roller (4) and is used to adjust the operating clearance between the first calendering roller (5) and the second calendering roller (6), and then materials are calendered within the clearance for forming. The pressure from the pressurizing mechanism acts on the pressurizing roller, and the calendering roller is uniformly stressed in the longitudinal direction by the pressurizing roller, thereby avoiding the defect of the longitudinal arrangement of a lithium membrane being uneven due to the calendering roller being oversized and the defect of the thickness of the lithium membrane being uneven due to the deformation of the calendering roller.

Description

Description: A multi-roll calendering device

Technical field

[0001] The present invention relates to the field of calenders, and more particularly to a multi-roll calendering apparatus.

Background technique

[0002] In the battery production process, the lithium-receiving process of the lithium-ion battery pole piece is the key technology to improve the capacity of the lithium-ion battery. The key to the lithium-replenishing process is the pressing and laminating, and the calendering process is to have a thickness of 0.25 mm~0.5. A process in which a lithium ribbon of mm is calendered into a lithium film and attached to a traction film. In the prior art, the pressing mechanism is used to apply pressure to the calendering roller, and the pressing force acts on the bearing position at both ends of the calendering roller. Since the calendering roller is pressed during a large pressure (greater than 3T), the roller surface is slightly generated. The phenomenon of deformation causes the lithium film which is rolled out to have a thick intermediate portion and a thin end at both ends, resulting in a decrease in the quality of the lithium film. If the diameter of the calender roll is increased to meet the rigidity requirement, the roll surface deformation of the calender roll is prevented, and the longitudinal alignment of the lithium film after rolling is uneven, which cannot meet the process requirements.

technical problem

The technical problem to be solved by the present invention is to provide a multi-roll calendering apparatus in view of the above-mentioned drawbacks in the prior art.

Problem solution

Technical solution

[0004] The technical solution adopted by the present invention to solve the technical problem thereof is:

[0005] A multi-roll calendering apparatus is provided, including a pressure applying mechanism, a fine adjustment gap mechanism, a first pressure application roller, a second pressure application roller, and a first between the first pressure application roller and the second pressure application roller a calendering roller and a second calendering roller, the first pressing roller driving the first calendering roller to rotate, the second pressing roller driving the second calendering roller to rotate, and the pressing mechanism of the pressing mechanism On the first pressing roller, the fine adjustment gap mechanism is located between the first pressing roller and the second pressing roller, and is used for adjusting the work between the first calendering roller and the second calendering roller The gap, the material is calendered in the working gap.

[0006] In the multi-roll calender apparatus of the present invention, the first calender roll is coated with a first separator, and the second calender roll is coated with a second separator, and the material is in the first Extrusion of a calender roll and a second calender roll Attached to the isolation film having a large release force in the first isolation film and the second isolation film.

[0007] In the multi-roll calendering apparatus according to the present invention, a first pressing roller bearing housing is disposed at both ends of the first pressing roller, and a second application is disposed at both ends of the second pressing roller. a pressure roller bearing housing, the fine adjustment gap system being located between the first pressure roller bearing housing and the second pressure roller bearing housing.

[0008] In the multi-roll calender apparatus of the present invention, both ends of the first calender roll are provided with a first calender roll bearing seat, and both ends of the second calender roll are provided with a second calender roll chock An elastic member is disposed between the first calender roll chock and the second calender roll chock, and between the second calender roll chock and the second applicator roll chock.

[0009] In the multi-roll calender apparatus of the present invention, the fine adjustment gap system includes a motor, a lead screw, a guide rail, a first oblique block, a second oblique block, a third oblique block, and a fourth oblique block;

[0010] the motor is drivingly connected to the screw rod, and the screw rod drives the first oblique block to move left and right along the axial direction of the screw rod by a threaded structure, the first oblique block and the second The inclined block is slidably connected to drive the second oblique block to move up and down, one end of the third oblique block is fixed on the second inclined block, and the other end of the third oblique block extends to the first application Between the pressure roller bearing housing and the fourth oblique block, the fourth oblique block is fixed on the second pressure roller bearing housing, and the third oblique block adjusts the first pressure in the up and down movement The gap between the roller bearing housing and the second pressure roller bearing housing.

[0011] In the multi-roll calender apparatus according to the present invention, the third inclined block is provided with rollers on both side surfaces of the first pressing roller bearing housing and the fourth inclined block.

[0012] In the multi-roll calender apparatus according to the present invention, the second inclined block is provided with a stopper structure for restricting horizontal displacement of the second inclined block.

[0013] In the multi-roll calender apparatus of the present invention, the pressure applying mechanism includes a cylinder fixed to the frame and a pressure sensor fixed to the first pressure roller bearing housing, and the pressure sensor is located Between the first pressure roller bearing housing and the oil cylinder, the pressure sensor senses that the actual application pressure of the oil cylinder acting on the first pressure roller bearing housing is greater than or less than a preset value, and the The cylinder changes the output pressure.

[0014] In the multi-roll calender apparatus according to the present invention, the color mark sensor is provided above the first calender roll and the second calender roll.

[0015] In the multi-roll calendering apparatus according to the present invention, the material is a lithium belt or a copper belt.

Advantageous effects of the invention Beneficial effect

[0016] The two pressing rolls of the present application are driving wheels, and the two calendering rolls are driven wheels, and the force of the pressing mechanism acts on the pressing roller which can meet the rigidity requirement, and the roller surface of the pressing roller is pressed against the calendering roller. Roll surface. During the calendering process, the calendering rolls are subjected to a uniform force from the pressing rolls in the longitudinal direction to avoid micro-deformation of the calendering rolls, so that the diameter of the calendering rolls can be made small, thereby avoiding the excessively large calender rolls. The defect that the lithium film is unevenly arranged in the longitudinal direction avoids the defect of uneven thickness of the lithium film caused by the deformation of the calender roll.

Brief description of the drawing

DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural view of a multi-roll calendering apparatus according to a preferred embodiment of the present invention;

2 is a schematic structural view of a bearing housing and a fine adjustment gap mechanism of the multi-roll calendering apparatus shown in FIG. 1.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] As shown in FIG. 1 , a multi-roll calendering apparatus according to a preferred embodiment of the present invention includes a frame (not labeled), and the frame is provided with a feeding mechanism (not shown), a roller mechanism, The pressing mechanism 7, the fine adjustment gap mechanism 8, and the color code sensor 9. Wherein, the roller mechanism comprises four rollers arranged in parallel, which are a first pressing roller 3, a second pressing roller 4, a first calendering roller 5 and a second calendering roller 6, respectively, a first calendering roller 5 and a second The calender roll 6 is located between the first press roll 3 and the second applicator roll 4, and the first press roll 3 drives the first calender roll 5 to rotate, and the second press roll 4 drives the second calender roll 6 to rotate. The pressing force of the pressing mechanism 7 acts on the first pressing roller 3 to press the first calendering roll 5 and the second calendering roll 6 against each other. The fine adjustment gap mechanism 8 is located between the first pressure applying roller 3 and the second pressure applying roller 4 for adjusting the working gap between the first calendering roller 5 and the second calendering roller 6. The feeding mechanism feeds the material 10 into the working gap between the first calendering roll 5 and the second calendering roll 6, from which the material 10 is passed and calendered in the working gap.

[0022] The multi-roll calendering apparatus of the present invention can calender a material 10 having a thickness greater than 0.25 mm to a thickness of 0.003 to 0.

005mm film. The material 10 of the embodiment is a lithium strip, and the thickness of the incoming material of the lithium strip is different, The multi-roll calendering apparatus can press a lithium strip having a thickness of 0.25 mm to 0.5 mm into a lithium film having a thickness of 0.003 mm to 0.005 mm by multiple rolling. It can be understood that the present application does not limit the specific material of the material 10, and the material 10 can also be other materials such as copper strips.

[0023] In the calendering process, in order not to adhere the lithium film to the first calender roll 5 and the second calender roll 6, it is necessary to provide a separator between the two calender rolls and the lithium film to make the lithium film and the two The calender rolls are isolated. Specifically, the first calender roll 5 is coated with a first separator 1, and the second calender roll 6 is coated with a second separator 2. In order to prevent the calendered lithium film from adhering to the two separators, the release force of the first separator 1 and the second separator 2 is different, and the rolled lithium film adheres to the release force. Separated on the membrane and taken away. In this embodiment, the release force of the second separator 2 is greater than the release force of the first separator 1, and the lithium film is attached to the second separator 2 and carried away by the second separator 2.

[0024] Normally, the lithium film adheres to the second separator 2, is carried away by the second separator 2, and does not adhere to the first calender roll 5 and the second calender roll 6. When the correction system is abnormal, the lithium film cannot be completely carried away by the second separation film 2, and adheres to the first calender roll 5 and the second calender roll 6. Since the color of the lithium film and the calender roll are different, the color mark sensor 6 senses the lithium film attached to the calender roll, and an alarm signal is issued, and the system stops. In this embodiment, a corresponding color code sensor is disposed above each of the calender rolls, and the laser beam of the color mark sensor 9 is perpendicular to the center of the calender roll.

[0025] The first pressing roller 3 and the second pressing roller 4 of the present application are driving wheels, and the two pressing rollers are respectively driven and connected with two servo motors (not shown), and are driven by the servo motor. . The first calender roll 5 and the second calender roll 6 are driven wheels, the first calender roll 5 is rotated by the first press roll 3, and the second calender roll 6 is rotated by the second press roll 4.

As shown in FIG. 2, the first pressure roller 3 is respectively provided with a first pressure roller bearing housing 30, and the second pressure roller 4 is respectively provided with a second pressure roller bearing housing 40. A first calendering roll bearing housing 50 is disposed at each end of the first calendering roll 5, and a second calendering roll chock 60 is disposed at each end of the second calendering roll 6.

[0027] In the prior art, the pressing mechanism is used to apply pressure to the calendering rolls, and the pressing force is respectively located at the bearing positions at both ends of the calendering rolls. Since the calendering rolls are pressed under a large pressure (greater than 3T), the rolling surface will be The phenomenon of micro-deformation causes the lithium film which is rolled out to have a thick intermediate portion and a thinner both ends. In order to overcome this phenomenon, the force of the pressing mechanism 7 of the present application acts on a pressing roller that satisfies the rigidity requirement, and the roller surface of the pressing roller is in contact with the roller surface of the calendering roller. During the calendering process, the calender rolls are subjected to pressure from the pressure roller in the longitudinal direction. The uniform force is applied to avoid micro-deformation of the calendering roll, so that the diameter of the calendering roll can be made small, thereby avoiding the defect of uneven longitudinal alignment of the lithium film caused by the excessive calendering roll, and avoiding deformation due to the calendering roll. A defect that causes uneven thickness of the lithium film.

In the present embodiment, the pressing force of the pressing mechanism 7 acts on the first pressing roller 3. As shown in Fig. 1, the pressing mechanism 7 includes a cylinder 71 and a pressure sensor 72. Wherein, the oil cylinder 71 is fixed on the frame, and the pressing force of the oil cylinder 71 acts on the first pressure applying roller 3, and the first pressure applying roller 3 uniformly conducts the pressing force of the oil cylinder 71 to the first calendering roller 5 to make the first The calender roll 5 presses the lithium belt. The pressure sensor 72 is used to sense the actual applied pressure of the cylinder 71, and the pressure sensor 72 is fixed to the first pressure roller bearing housing 30 and between the cylinder 71 and the first pressure roller bearing housing 30.

[0029] Since the magnitude of the applied pressure is also an element determining the quality of the rolled lithium film, the present application adopts a closed-loop control of the magnitude of the applied pressure so that the applied pressure operates smoothly in a small range. Specifically, the controller (not shown) sets a preset value for the applied pressure, and the pressure sensor 72 senses the actual applied pressure. If the actual applied pressure is greater than or less than the preset value, the controller issues a command to adjust the pressure of the oil supply to the oil cylinder 71. Thus, the relative balance of the applied pressure is achieved by changing the output pressure of the cylinder 71.

[0030] A working gap for rolling the lithium strip is formed between the first calender roll 5 and the second calender roll 6. Since the thickness of the incoming strip of the lithium strip is different, the required working gap is also different, so the calendering force is not The size of the working gap is particularly important in the case of a change. In this embodiment, a fine adjustment gap mechanism 8 is disposed between the first pressure applying roller 3 and the second pressure applying roller 4, and the fine adjustment gap mechanism 8 adjusts between the first pressure applying roller 3 and the second pressure applying roller 4. The gap, thereby adjusting the size of the working gap between the first calendering roll 5 and the second calendering roll 6.

[0031] As shown in FIG. 2, the fine adjustment gap mechanism 8 includes a motor 80, a reducer 81, a lead screw 82, a guide rail 83, a first oblique block 84, a second oblique block 85, a third oblique block 86, and a fourth oblique block. 87. Fixing block 88 and roller 89.

[0032] Wherein, the motor 80 and the guide rail 83 are respectively fixed on the frame, the motor 80 is drivingly connected with the reducer 81, one end of the screw rod 82 is connected to the reducer 81, and is rotated by the reducer 81, the lead screw The other end of the 82 is connected to the first oblique block 84 by a threaded structure, and the first inclined block 84 is located above the guide rail 83. Since the lead screw 82 and the first oblique block 84 are connected by a screw structure, the first oblique block 84 can move left and right on the guide rail 83 along the axial direction of the screw shaft 82 during the rotation of the screw rod 82.

[0033] The second oblique block 85 is slidably coupled above the first oblique block 84, and the contact faces of the first oblique block 84 and the second oblique block 85 are both inclined surfaces. The first oblique block 84 moves left and right on the guide rail 83 to move the second oblique block 85 up and down . Preferably, one end of the second oblique block 85 is provided with the constrained structure 100 to limit the displacement of the second oblique block 85 in the horizontal direction, so that the second oblique block 85 can only move up and down. The limiting structure 100 includes a sliding rail 101, a slider 102, a first connecting member 103 and a second connecting member 104. The slide rails 101 are vertically distributed, and are fixed to the frame by the first connecting member 103, and the slider 102 is slidably coupled to the slide rail 101. One end of the second connecting member 104 is fixed to the second inclined block 85, and the other end is fixed to the slider 102. Since the slider 102 can only move up and down along the slide rail 101, the second oblique block 85 fixedly coupled to the slider 102 can only move up and down.

[0034] The third oblique block 86 has a substantially L-shaped structure, and one end thereof is fixed on the second inclined block 85, and can move up and down following the second oblique block 85. One end of the fixing block 88 is fixed to the second pressure roller bearing housing 40, the other end extends toward a side close to the first pressure roller bearing housing 30, and the fourth oblique block 87 is fixed to the fixing block 88 toward the first pressure applying roller. One side of the bearing housing 30. The other end of the third inclined block 86 extends between the first pressure roller bearing housing 30 and the fourth oblique block 87, and the two sides of the third oblique block 86 are respectively associated with the first pressure roller bearing housing 30 and the fourth The oblique block 87 abuts. The contact faces of the third oblique block 86 and the fourth oblique block 87 are both inclined surfaces, so that the third oblique block 86 moves up and down to move the fourth oblique block 87 to the left and right.

[0035] Since the fourth oblique block 87 is fixed on the fixing block 88, the fixing block 88 is fixed on the second pressure roller bearing housing 40, and the fourth oblique block 87 is moved in the left and right to drive the second pressure roller bearing housing. The movement of 40 is performed to adjust the gap between the first pressure roller bearing housing 30 and the second pressure roller bearing housing 40. Since the first calender roll 5 and the second calender roll 6 are located between the two press rolls, when the size of the gap between the two press rolls is changed, the size of the working gap between the two calender rolls is also changed.

[0036] Preferably, an elastic member 400 is disposed between the second pressure roller bearing housing 40 and the second calendering roller bearing housing 60, and between the first calendering roller bearing housing 50 and the second calendering roller bearing housing 60. The gap between the second pressure roller bearing housing 40 and the second calendering roller bearing housing 60, and the gap between the first calendering roller bearing housing 50 and the second calendering roller bearing housing 60 are supported by the elastic force of the elastic member 400. In this embodiment, the elastic member 400 may be a structure such as a spring or a spring.

[0037] Preferably, in order to reduce the friction between the third oblique block 86 and the first pressure roller bearing housing 30, and between the third oblique block 86 and the fourth oblique block 87, the fine adjustment precision is improved, the third oblique Rollers 89 are provided on both sides of the block 86 that abut against the first pressure roller bearing housing 30 and the fourth oblique block 87, respectively.

[0038] Further, the inclination between the first oblique block 84 and the second oblique block 85, the inclination between the third oblique block 86 and the fourth oblique block 87, the lead of the screw rod 82, and the speed reducer Speed ratio can be set as needed to adjust two The working gap between the calender rolls.

[0039] As shown in FIG. 1, the upper guide wheel 200 and the lower guide wheel 300 are further disposed on the frame. The upper guide wheel 200 and the lower guide wheel 300 are respectively disposed above and below the bearing housing for clamping the bearing housing. Up and down position. Since the bearing seat is subjected to a large up-and-down radial force during the rolling process, if it is only supported by the guide post (not shown), it will not only damage the guide but also be unstable, and the upper and lower guide wheels are The bearings can be flexibly moved to the left and right, and can withstand greater radial forces. In the present embodiment, the first pressure roller bearing housing 30, the second pressure roller bearing housing 40, the first calendering roller bearing housing 50, and the second calendering roller bearing housing 60 are respectively provided with guide wheels at upper and lower sides.

[0040] In summary, a multi-roll calendering apparatus embodying the present invention has the following beneficial effects: The two pressing rolls of the present application are driving wheels, and the two calendering rolls are driven wheels, and the force of the pressing mechanism On the pressing roller that satisfies the rigidity requirement, the roller surface of the pressing roller is in contact with the roller surface of the calendering roller. During the calendering process, the calendering rolls are subjected to a uniform force from the pressing rolls in the longitudinal direction to avoid micro-deformation of the calendering rolls, so that the diameter of the calendering rolls can be made small, thereby avoiding the excessively large calender rolls. The defect that the lithium film is unevenly arranged in the longitudinal direction avoids the defect of uneven thickness of the lithium film caused by the deformation of the calender roll.

[0041] While the invention has been described by way of specific embodiments, it will be understood that In addition, various modifications may be made to the invention without departing from the scope of the invention. Therefore, the invention is not limited to the specific embodiments disclosed, but all embodiments that fall within the scope of the appended claims.

Claims

Claim

[Claim 1] A multi-roll calendering apparatus comprising: a pressing mechanism (7), a fine adjustment gap mechanism (8), a first pressing roller (3), a second pressing roller (4), and a first calendering roll (5) and a second calendering roll (6) between the first pressing roll (3) and the second pressing roll (4), the first pressing roll (3) driving the place The first calender roll (5) rotates, the second press roll (4) drives the second calender roll (6) to rotate, and the pressing force of the pressing mechanism (7) acts on the first application On the pressure roller (3), the fine adjustment gap mechanism (8) is located between the first pressure application roller (3) and the second pressure application roller (4), and is used for adjusting the first calendering roller ( ₅ ) With the working gap between the second calender rolls ( ₆ ), the material is calendered in the working gap.

[Claim 2] The multi-roll calender apparatus according to claim 1, wherein the first calender roll

(5) coated with a first separator (1), the second calender roll (6) is coated with a second separator (2), and the material is at the first calender roll (5) and the second The calender roll (6) is adhered to the separator having a large release force in the first separator (1) and the second separator (2).

[Claim 3] The multi-roll calender apparatus according to claim 1, wherein the first pressure roller

a first pressure roller bearing housing (30) is disposed at both ends of the (3), and a second pressure roller bearing housing (40) is disposed at both ends of the second pressure applying roller (40), the fine adjustment gap system (8) Located between the first pressure roller bearing housing (30) and the second pressure roller bearing housing (40).

[Claim 4] The multi-roll calender apparatus according to claim 3, wherein the first calender roll

(5) is provided at both ends with a first calendering roll bearing housing (50), and at both ends of the second calendering roll (6), a second calendering roll chock (60) is provided; the first calendering roll chock (50) An elastic member (400) is disposed between the second calender roll chock (60) and the second calender roll chock (60) and the second applicator roll chock (40).

[Claim 5] The multi-roll calender apparatus according to claim 3, wherein the fine adjustment gap system (8) comprises a motor (80), a lead screw (82), a guide rail (83), and a first oblique block (84), a second inclined block (85), a third inclined block (86) and a fourth inclined block (87); the motor (80) is drivingly connected to the screw rod (82), the screw rod ( 82) through the snail The rib structure moves the first slanting block (84) to move left and right along the axial direction of the screw rod (82), and the first slanting block (84) is slidably coupled to the second slanting block (85) and driven The second oblique block (85) moves up and down, one end of the third oblique block (86) is fixed on the second oblique block (85), and the other end of the third oblique block (86) extends to Between the first pressure roller bearing housing (30) and the fourth oblique block (87), the fourth oblique block (87) is fixed on the second pressure roller bearing housing (40). The third oblique block (86) adjusts a gap between the first pressure roller bearing housing (30) and the second pressure roller bearing housing (40) during up and down movement.

The multi-roll calendering apparatus according to claim 5, wherein said third inclined block (86) is respectively opposed to said first pressure roller bearing housing (30) and said fourth oblique block (87) Rollers (89) are placed on both sides of the joint.

The multi-roll calendering apparatus according to claim 5, wherein the second inclined block (85) is provided with a stopper structure for restricting horizontal displacement of the second oblique block (85) (1 00 ).

The multi-roll calendering apparatus according to claim 3, wherein said pressing mechanism (7) comprises an oil cylinder (71) fixed to the frame and fixed to said first pressure roller bearing housing (30) a pressure sensor (72), and the pressure sensor (72) is located between the first pressure roller bearing housing (30) and the cylinder (71), and the pressure sensor (72) senses the cylinder (71) The actual applied pressure acting on the first pressure roller bearing housing (30) is greater or less than a preset value 吋, and the cylinder (71) is controlled to change the output pressure.

The multi-roll calendering apparatus according to claim 1, wherein said first calender roll

(5) A color code sensor (9) is disposed above the second calender roll (6). The multi-roll calendering apparatus according to claim 1, wherein the material is a lithium tape or a copper tape.