阅读说明：本技术 一种降低收卷波浪边的二次分切方法 (Secondary slitting method for reducing rolling wavy edges ) 是由 赵洪亮 刘涛涛 翁星星 沈亚定 于 2021-01-19 设计创作，主要内容包括：本发明公开了一种收卷波浪边的二次分切方法。隔膜逆时针自放卷下半部开始收卷,依次绕过第一过辊上半部、弧形辊下半部、切刀辊上半部、第二过辊下半部、第三过辊上半部,然后切分为多卷分膜,每个分膜分别依次经过过辊下半部、收卷压辊上半部,缠绕至收卷卷芯完成收卷。在收卷时,采用间隙收卷的收卷方式,避免隔膜发生挤压,随着收卷直径的不断增大,收卷张力按照张力曲线系数所提供的的张力曲线进行衰减,同时辅助以恒定的收卷压力,二者相互匹配设置,保证了收卷端面的整齐,也保证了收卷硬度的硬度适宜。本发明既能大大降低小分切二次分切收卷后隔膜波浪边的不良率,同时也能降低其后期发生形变而造成二次不良。(The invention discloses a secondary slitting method of a rolling wavy edge. The diaphragm is anticlockwise from unreeling the lower half and beginning the rolling, winds first roller upper half, arc roller lower half, cutter roller upper half, second roller lower half, third roller upper half in proper order, then the segmentation is multiscroll branch membrane, and every divides the membrane to pass through roller lower half, rolling compression roller upper half respectively in proper order, winds to the rolling core completion rolling. When the rolling, adopt the rolling mode of clearance rolling, avoid the diaphragm to take place the extrusion, along with the constantly increase of rolling diameter, the tension curve that rolling tension provided according to tension curve coefficient attenuates, and the supplementary rolling pressure with invariant simultaneously, the two sets of mutually supporting has guaranteed the neatly of rolling terminal surface, has also guaranteed that the hardness of rolling hardness is suitable. The invention can greatly reduce the reject ratio of the wavy edge of the diaphragm after the secondary slitting and rolling of the small slits, and can also reduce the secondary defect caused by the deformation of the diaphragm at the later stage.)

1. A secondary slitting method for reducing rolling wavy edges is characterized in that: the diaphragm is by preceding to back in proper order through unreeling (1), first roller (2), curved roll (3), cutter roller (4), second roller (5), third roller (6) of crossing, then cuts into multireel branch membrane (10), and every divides membrane (10) to pass through roller (7), rolling compression roller (8) respectively in proper order, twines to the completion rolling of rolling up core (9).

2. The double slitting method for reducing the wrap-up wavy edge according to claim 1, characterized in that: the diaphragm is anticlockwise from unreeling (1) the lower half and begins the rolling, winds first roller (2) first, arc roller (3) lower half, cutter roller (4) first, roller (5) lower half is crossed to the second, roller (6) first is crossed to the third in proper order, then the segmentation is many rolls of branch membrane (10), every divides membrane (10) to pass through roller (7) lower half, first rolling compression roller (8) respectively in proper order, twine to the rolling core (9) and accomplish the rolling.

3. The double slitting method for reducing the wrap-up wavy edge according to claim 1, characterized in that: the rolling width of the film (10) is less than or equal to 500 mm.

4. The double slitting method for reducing the wrap-up wavy edge according to claim 1, characterized in that: the clearance between rolling compression roller (8) and rolling core (9) is compression nip (11), compression nip (11) are 1 ~ 2 mm.

5. The double slitting method for reducing the wrap-up wavy edge according to claim 1, characterized in that: the winding speed of the diaphragm is 60-80 m/min.

6. The double slitting method for reducing the wrap-up wavy edge according to claim 1, characterized in that: the initial rolling pressure of the diaphragm is 2-4N/m.

7. The double slitting method for reducing the wrap-up wavy edge according to claim 1, characterized in that: the rolling initial tension of the diaphragm is 20-40N/m.

8. The double slitting method for reducing the wrap-up wavy edge according to claim 1, characterized in that: the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

9. The double slitting method for reducing the wrap-up wavy edge according to claim 1, characterized in that: the winding tension curve coefficient of the diaphragm is 1.1-1.5.

Technical Field

The invention relates to the technical field of diaphragm winding, in particular to a secondary slitting method for reducing winding wavy edges.

Background

The small splitting machine is a device for carrying out secondary splitting and rolling on the primary split base film or the coated ceramic diaphragm, and the secondary split finished diaphragm is directly used for winding production of batteries of lithium battery manufacturers without secondary splitting. The final slitting and winding effects of the diaphragm are directly influenced by the small slitting process, the poor small slitting process can cause poor deformation such as wavy edges in winding of the final finished diaphragm, and the poor performance of the diaphragm can cause equipment failure and poor performance of a battery manufacturer when the battery is wound. The current finished product after little cutting machine cuts has serious outward appearance bad: and (4) wave edges. And the cut finished product can also generate poor later-stage deformation after being placed for aging: and (4) wave edges. These not only severely impact the ultimate yield of the diaphragm production, but also are more likely to lead to customer handling problems after the product is delivered to the customer.

The secondary of wavy limit defective rate and later stage deformation after the rolling is cut to little cutting machine secondary is bad, and urgent needs are solved to improve the final finished product yield that little cutting machine secondary was cut, need a new technological method to go to cooperate little cutting machine to carry out the secondary of diaphragm and cut, guarantee higher final product yield.

Disclosure of Invention

The invention aims to provide a secondary slitting method for reducing rolling wavy edges so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme:

a secondary slitting method for reducing rolling wavy edges is characterized in that a diaphragm sequentially passes through an unreeling roller, a first roller, an arc roller, a cutter roller, a second roller and a third roller from front to back and then is split into multiple rolls of film sub-films, and each film sub-film sequentially passes through the roller and a rolling compression roller and is wound to a rolling core to complete rolling.

Further, the diaphragm is anticlockwise from unreeling the lower half and begins the rolling, and first roller first, arc roller lower half, cutter roller first, roller lower half, third roller first are crossed in proper order to the first roller of passing, second, then the segmentation is the multireel branch membrane, and every divides the membrane to pass through roller lower half, rolling compression roller first in proper order respectively, twines to the rolling core completion rolling.

Furthermore, the rolling width of the film separation is less than or equal to 500 mm. More preferably 200 mm and 400 mm.

Further, the clearance between rolling compression roller and the rolling core is the compression roller clearance, the compression roller clearance is 1 ~ 2 mm. The purpose of the roll gap is to retain air brought by the membrane layers before winding between the layers as much as possible, so as to ensure lower extrusion between the layers. When the gap between the compression rollers is larger than 2mm, the length of the diaphragm between the winding compression roller and the winding core is too long, and the diaphragm between the winding compression roller and the winding core cannot be well tensioned and leveled. The position of the winding core is kept fixed (the winding is stable), and the constant clearance of the compression roller is ensured by controlling the mode that the winding compression roller gradually retreats along with the increase of the winding diameter.

Further, the rolling speed of the diaphragm is 60-80 m/min. The winding speed is matched with the winding initial tension and the winding initial pressure, and the flatness and the uniformity of the winding film roll are ensured.

Further, the initial rolling pressure of the diaphragm is 2-4N/m. In order to guarantee the roughness on rolling diaphragm surface, prevent that the diaphragm from taking place to stick up limit, violently muscle, can not use the rolling initial pressure of too big or undersize, too big rolling initial pressure can lead to diaphragm fold, stick up the limit, and the rolling initial pressure of undersize can lead to the diaphragm to slide, the terminal surface fracture.

Further, the rolling initial tension of the diaphragm is 20-40N/m. In order to guarantee the rolling tightness of the rolling diaphragm, the phenomenon of loosening after the rolling of the diaphragm is avoided, and the diaphragm is guaranteed not to be stretched and deformed, the rolling initial tension which is too large or too small cannot be used, the rolling initial tension which is too large can lead to the stretching and deformation of the diaphragm, the rolling initial tension which is too small can lead to the insufficient tension of the diaphragm, the rolling tightness is insufficient, and the phenomena of sliding, folding, loosening and the like can be caused.

Further, the rolling tension attenuation ratio of the rolling tension curve of the diaphragm is 50% (from the rolling initial diameter phi 95mm to the maximum diameter phi 195 mm). The tension attenuation proportion is the percentage of tension at the end of winding in the initial winding tension, and 50% of the tension attenuation proportion can ensure enough tension of a diaphragm wound later under the initial winding tension of 20-40N/m, so that winding deviation is prevented. Meanwhile, the tension is attenuated more quickly, and the winding tightness of the winding can be ensured to be softer.

Further, the winding tension curve coefficient of the diaphragm is 1.1-1.5. The tension attenuation device is used for defining the specific change trend of the tension attenuation process and the corresponding percentage of winding tension in different winding diameters, ensuring that the winding tension is attenuated and changed in a mode that the attenuation speed is low at the beginning and the attenuation speed is high at the back, ensuring that the initial backing tension of the winding is enough, avoiding the initial winding from being too loose, and simultaneously ensuring that the back winding is softer and avoiding the excessive extrusion between films. When the tension curve coefficient is 1.1 ~ 1.5, can make the later stage keep sufficient tension to carry out the rolling of diaphragm, can not lead to the rolling diaphragm to unwind because of tension undersize, also can not lead to rolling diaphragm tensile deformation because of tension is too big for the soft or hard degree of rolling diaphragm is suitable.

Compared with the prior art, the invention has the following beneficial effects:

the invention discloses a secondary slitting method for reducing rolling wavy edges. When the rolling, adopt the rolling mode of clearance rolling, avoid rolling compression roller and the rolling to roll up the roll diaphragm of core and take place the extrusion, prevent to violently muscle is bad because of rolling fold and the rolling that the extrusion caused the rolling diaphragm. Along with the continuous increase of rolling diameter, tension attenuates according to the tension curve that tension curve coefficient provided, supplementary with invariable rolling pressure simultaneously, and the two matches the setting each other, has guaranteed the neatly of rolling terminal surface, has also guaranteed that the hardness of rolling hardness is suitable. When the wave edge is increased after the small splitting machine cuts and rolls twice, the rolling tension and the rolling pressure are respectively adjusted to be small, the rolling tension curve coefficient is adjusted to be large, the prior adjusting sequence is the rolling tension, the rolling tension and the rolling tension curve coefficient, and the deformation can be rapidly reduced and the loss can be reduced through sequential adjustment. And the proper hardness of the final winding can ensure lower extrusion between the film layers in the winding process and after winding, and finally the purpose of reducing the deformation of the winding wavy edge is achieved. The secondary slitting method for reducing the winding wavy edges disclosed by the invention can greatly reduce the reject ratio of the diaphragm wavy edges after the secondary slitting and winding of the small slits, can also reduce secondary defects caused by deformation at the later stage of the secondary slitting and winding of the small slits, and can be used for factory production.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of a winding process of the present invention;

FIG. 2 is a schematic diagram of the winding tension curve of the present invention;

in fig. 1: 1, unwinding; 2, first passing through a roller; 3, an arc-shaped roller; 4, a cutter roller; 5, second roller passing; 6, third roller passing; 7, passing through a roller; 8, rolling a compression roller; 9, winding a winding core; 10, film separation; 11 nip roll.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 2N/m.

Wherein the rolling initial tension of the diaphragm is 20N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.1.

Example 2

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 2N/m.

Wherein the rolling initial tension of the diaphragm is 20N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.5.

Example 3

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 4N/m.

Wherein the rolling initial tension of the diaphragm is 20N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.1.

Example 4

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 4N/m.

Wherein the rolling initial tension of the diaphragm is 20N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.5.

Example 5

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 3N/m.

Wherein the rolling initial tension of the diaphragm is 30N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.3.

Example 6

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 2N/m.

Wherein the rolling initial tension of the diaphragm is 40N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.1.

Example 7

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 2N/m.

Wherein the rolling initial tension of the diaphragm is 40N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.5.

Example 8

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 4N/m.

Wherein the rolling initial tension of the diaphragm is 40N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.1.

Example 9

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 4N/m.

Wherein the rolling initial tension of the diaphragm is 40N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.5.

Comparative example 1

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 3N/m.

Wherein the rolling initial tension of the diaphragm is 10N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.3.

Comparative example 2

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 3N/m.

Wherein the rolling initial tension of the diaphragm is 50N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.3.

Comparative example 3

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 1N/m.

Wherein the rolling initial tension of the diaphragm is 30N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.3.

Comparative example 4

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 5N/m.

Wherein the rolling initial tension of the diaphragm is 30N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.3.

Comparative example 5

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 3N/m.

Wherein the rolling initial tension of the diaphragm is 30N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the rolling tension curve coefficient of the diaphragm is 1.0.

Comparative example 6

A secondary slitting method for reducing rolling wavy edges comprises the following rolling steps:

the diaphragm is anticlockwise from unreeling 1 lower half and beginning the rolling, winds first 2 upper half, 3 lower halves of curved roll, 4 upper half of cutter roll, 5 lower halves of second cross roller, 6 upper halves of third cross roller in proper order, then cuts into three rolls and divides membrane 10, and every divides membrane 10 to pass through 7 lower halves of roller, 8 upper halves of rolling compression roller respectively in proper order, twines to the rolling core 9 completion rolling.

Wherein, the width of the mother roll diaphragm is 950mm, the slitter edges at the left and right sides are cut off, each slitter edge is 25mm, and the rolling width of each film division 10 is 300 mm.

Wherein the nip 11 is 2 mm.

Wherein the rolling speed of the diaphragm is 60 m/min.

Wherein the initial rolling pressure of the diaphragm is 3N/m.

Wherein the rolling initial tension of the diaphragm is 30N/m.

Wherein, the rolling tension attenuation percentage in the rolling tension curve of the diaphragm is 50%.

Wherein, the coefficient of the winding tension curve of the diaphragm is 1.6.

The winding tension of the embodiments 1-9 and the comparative examples 1-6 in the application changes along with the winding diameter from the diameter phi 95mm of the winding core to the final winding diameter phi 195mm, and the tension decays from 100% to the final tension of 50% by different tension curve coefficients.

The embodiment divides into 9 female rolls altogether, every female roll cuts the rolling totally 3 finished product rolls, totally counts rolling finished product roll 27 rolls, and wherein the bad roll number of wavy edge totally counts 3 rolls, and the average defective rate of wavy edge: 3/27 ═ 11.11%;

6 female rolls are cut altogether to the comparative example, every female roll cuts the rolling totally 3 finished product rolls, totally 18 rolls of rolling finished product roll, compare with experimental example 5, wherein initial rolling tension is 10N/m in the comparative example 1, is less than 20 ~ 40N/m, and wherein the bad volume number of wave limit counts 2 rolls totally, wave limit defective rate: 2/3 is 66.67%, the initial tension is too low, the later winding tension is easy to be insufficient, and the defective rate of wavy edges is increased;

in the comparative example 2, the initial winding tension is 50N/m and is more than 20-40N/m, wherein the number of the bad wave edge rolls is 3 in total, and the bad wave edge rate is as follows: 3/3 is 100 percent, the initial tension is too large, the diaphragm is easy to stretch and deform, and the defective rate of wavy edges is increased;

the initial rolling pressure in the comparative example 3 is 1N/m and is less than 2-4N/m, wherein the number of the bad rolls on the wavy edge is 3 in total, and the bad rate of the wavy edge is as follows: 3/3 is 100%, the initial pressure is too low, the diaphragm is easy to deflect, and the defective rate of wavy edges is increased;

the initial rolling pressure in the comparative example 4 is 5N/m and is more than 2-4N/m, wherein the number of the bad rolls on the wavy edge is 3 in total, and the bad rate of the wavy edge is as follows: 3/3 is 100%, the initial pressure is too large, the membrane is easy to be rolled and folded and rolled and rib is easy to be broken, and the reject ratio of the wavy edge is increased;

in comparative example 5, the coefficient of the tension curve is 1.0 and is less than 1.1 to 1.5, wherein the number of defective wavy edge rolls is 3 in total, and the defective wavy edge ratio is as follows: 3/3 is 100 percent, the tension curve coefficient is too small, the coiling is easy to loose, the diaphragm slides, and the defective rate of the wavy edge is increased;

in comparative example 6, the coefficient of the tension curve is 1.6, which is greater than 1.1 to 1.5, wherein the number of defective wavy edge rolls is 3 in total, and the defective wavy edge ratio: 3/3 is 100 percent, the tension curve coefficient is too small, the stretching deformation is easy to cause, and the defective rate of the wavy edge is increased;

through the data, the invention realizes the higher primary yield of the secondary slitting and rolling of the small slitting machine through the design matching adjustment of the process and the optimized configuration of the small slitting equipment, and solves the problem of poor deformation wavy edges after long-time placement in the later period.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.