Thin film winding device, thin film manufacturing device and thin film material winding method

Abstract

To disclose a thin film winding device for winding a thin film material into a thin film packaging, which can ensure a lowest possible thin film tension and can easily set a thin film tension.SOLUTION: A supply device (18) comprises a supply slide (30), a contact piece (36), and at least one tension adjustment device (38), the tension adjustment device (38) being attached to the supply slide (30) forward of the contact piece (36) to set a film tension of a thin film material (12). The tension adjustment device (38) includes a cylindrical deflector having a microporous surface provided at least in an arcuate cross-sectional area. A thin film manufacturing device and a winding method for the thin film material (12) are also disclosed.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a thin film winding device, a thin film manufacturing device, and a thin film material winding method.

Background Art

[0002] A thin film manufacturing device that manufactures a thin film material having specific material characteristics for a specific purpose from a molten resin is used. The thin film manufacturing device simultaneously includes a thin film stretching device that stretches a resin thin film in the longitudinal direction and / or the lateral direction.

[0003] The linear speed of the thin film stretching device is constantly increasing. One of the problems faced by the present invention lies in the technology of winding the completed final product, that is, the thin film material.

[0004] A thin film winding device for winding the manufactured thin film is known. During manufacturing, it is important to manufacture and wind the thin film such that a plurality of each layer can be easily separated without forming folds or wrinkles in the thin film material. When winding, the thin film tension is applied as evenly as possible to achieve easy separation of each layer.

[0005] Depending on the type of thin film to be manufactured, the manufacturing of the thin film is achieved depending on special manufacturing line factors. The manufacturing of extremely thin or ultra-thin thin films such as battery separation films (BSF) requires following strict conditions. For example, for thin films manufactured from polyethylene terephthalate or polypropylene, only a low thin film tensile force can be applied for the manufacturing of extremely thin thin films such as battery separation films.

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in order to compensate for the change in the thin film tension of the thin film winding device, a problem arises in that good followability of the thin film winding device is required with a low thin film tensile force. In addition, since the operation of precisely aligning the axes of the rolls and rollers to be used with each other is required, the setting of the known thin film winding device is extremely complicated.

[0007] Accordingly, an object of the present invention is to provide a thin film winding device, a thin film manufacturing device, and a thin film material winding method that can ensure an extremely low thin film tension and can easily set the thin film tension.

Means for Solving the Problems

[0008] The object of the present invention is achieved by a thin film winding device that winds a thin film material, particularly an ultra-thin thin film material, around a thin film core. The thin film winding device includes a winding device and a supply device. The winding device includes at least one winding core that winds a thin film to form a thin film bundle. The supply device includes a supply slider, a contact body, and at least one tension adjustment device. The contact body is attached to the supply slider and guides the thin film material from a contact piece to the winding core or the thin film bundle of the winding core. The tension adjustment device that is attached to the supply slider and sets the thin film tension of the thin film material is disposed in front of the contact body in the moving direction of the thin film material. The tension adjustment device includes a cylindrical deflector having a circumferential surface and an arcuate cross-section, and the circumferential surface of the cylindrical deflector includes at least one microporous surface formed in an arc region.

[0009] Since a cylindrical deflector is used as the tension adjustment device, the thin film tension can be controlled more actively by the cylindrical deflector and the microporous surface. The tension adjustment device has only a low inertial force and is not involved in setting the rotation conditions of the thin film material.

[0010] For example, the cylindrical deflector is formed at least partially hollow, particularly completely hollow. For example, the supply device is provided in front of the winding device in the moving direction of the thin film material. The tension adjustment device guides the thin film material to the contact piece.

[0011] In an embodiment of the present invention, the supply slider linearly moves forward and backward (approaching and separating) relative to the winding device. The supply slider may be provided immovably relative to the winding device.

[0012] The width (length) of the contact piece, particularly the contact roller, and the width (length) of the cylindrical deflector correspond to at least the width (length) of the thin film material. For example, the width of the thin film material is, for example, 6.2 m, 10.4 m, or 12 m, and is a dimension between 1.5 m and 15 m.

[0013] Only one of a plurality of winding cores is always guided with a thin film material, and two or more winding cores for winding a thin film core onto the winding core are provided in the winding device.

[0014] With the winding device, thin film manufacturing device, and thin film material winding device of the present invention, it is possible to manufacture and wind, for example, uniaxially stretched thin films or biaxially stretched ultra-thin films such as thin films for battery separation (BSF), polypropylene capacitor thin films, polyethylene terephthalate battery thin films, and PTFE diaphragms (polytetrafluoroethylene).

[0015] With the winding device, thin film manufacturing device, and thin film material winding device of the present invention, thicker thin films can also be manufactured.

[0016] The ultra-thin film is understood to mean a thin film having a thickness of less than 10 μm, particularly less than 5 μm. In that sense, the separation thin film for batteries also falls under the category of ultra-thin films. The thin film winding device particularly targets a device for winding a separation thin film for batteries (BSF) onto a thin film core.

[0017] The thin film tensile force achieved through the thin film winding device of the present invention is in the range of 1 N / m to 200 N / m, particularly 5 N / m to 15 N / m.

[0018] For example, due to the viscoelastic properties of the separation thin film for batteries, a high contact force between the thin film core (winding core) and the contact roller of the winding core cannot be used. For example, the contact force of the separation thin film for batteries is in the range of 0 N / m to 100 N / m, particularly 1 N / m to 10 N / m.

[0019] For example, the thin film material can be wound onto the thin film winding device at a speed in the range of 40 m / min to 350 m / min, particularly 150 m / min.

[0020] The arcuate cross-section is particularly a circular arc cross-section. However, the arcuate cross-section may also be in a form based on a geometric shape other than a circle. For example, an elliptical or spiral (cycloid) shape can be adopted as the arcuate shape.

[0021] In the embodiments of the present invention, since the winding angle around the cylindrical deflector for winding the thin film material is large and the stress of the thin film material is small, the arcuate cross-sectional angle corresponds to at least 90°, particularly at least 180° or at least 200°. This is also applied to the cylindrical deflector of the deflector.

[0022] The cross-section of the cylindrical deflector of the tension adjusting device and / or the deflector is, for example, a sector having a circular radius and an arc.

[0023] In the embodiments of the present invention, the microporous surface has a diameter of less than 900 μm, particularly less than 500 μm, and includes a plurality of openings that particularly form a uniform air buffer.

[0024] The plurality of openings are particularly evenly dispersed along the microporous surface. In particular, the microporous surface extends along at least 80%, particularly at least 90% of the length of the cylindrical deflector. The microporous surface is formed in the circumferential direction along at least 80%, particularly at least 90% of the circumferential length of the arc.

[0025] In the embodiments of the present invention, the supply device includes at least one deflector attached to a supply slider. The deflector is disposed between the tension adjusting device and the contact piece or in front of the tension adjusting device in the moving direction of the thin film material. The at least one deflector includes a cylindrical deflector having a circumferential surface. The cylindrical deflector has an arcuate cross-section. Since the cylindrical surface of the cylindrical deflector has at least one microporous surface in the arc region, the moving path of the thin film material can be selected extremely freely. For example, at least one deflector is fixed to the supply slider.

[0026] For example, the supply device includes at least two deflectors. One deflector is disposed in front of the tension adjusting device in the moving direction of the thin film material, and the other deflector is provided between the tension adjusting device and the contact piece in the moving direction of the thin film material.

[0027] In the embodiments of the present invention, the cylindrical deflector and / or the deflector of the tension adjusting device include a compressed air connector that introduces compressed air into the cylindrical deflector and supplies the compressed air to the cylindrical deflector flexibly.

[0028] For example, the compressed air supply source of a thin film winding device or a thin film manufacturing device is connected to an air connector that supplies compressed air generating sufficient air pressure inside the cylindrical deflector to the cylindrical deflector. In an embodiment of the present invention, the thickness of the thin film material is less than 10 μm, particularly less than 5 μm, and an ultra-thin film can be wound. A contact roller is provided on the contact piece, and a desired contact pressure can be accurately ensured.

[0029] In an embodiment of the present invention, the contact piece includes at least one position adjusting device, an adjusting slider provided on the at least one position adjusting device, and a contact roller movably, particularly linearly movably, attached to the supply slider by the at least one position adjusting device. Since the contact piece can move its position by the contact roller, the contact pressure of the contact piece against the winding core can be set over a wide range. The moving direction of the position adjusting device is, for example, parallel to the moving direction of the supply slider and / or the contact roller is attached to the supply slider.

[0030] In an embodiment of the present invention, the tension adjusting device includes at least one position adjusting device having an adjusting rail and an adjusting slider. The cylindrical deflector is attached to the supply slider movably, particularly linearly movably, by the at least one position adjusting device, so that the thin film tension can be set particularly precisely. The moving direction of the position adjusting device is parallel to the moving direction of the supply slider.

[0031] For example, the adjusting rail and / or the adjusting slider are provided with air openings that form an air support layer on the adjusting slider. The adjusting rail and / or the adjusting slider are connected to a compressed air supply source. The adjusting rail and the adjusting slider serve as a hydrostatic support portion.

[0032] At least two position adjusting devices are provided on the tensile force adjusting device and / or the contact piece, and a cylindrical deflector or a contact roller is attached to the end face of each position adjusting device, so that the moving mass is reduced as much as possible.

[0033] At least one position adjustment device includes at least one adjustment operating part that linearly moves an adjustment slider to precisely set the movement position of the adjustment slider. The plurality of position adjustment devices have a common adjustment operating lever.

[0034] In an embodiment of the present invention, the supply device includes at least one supply rail for a supply slider. In particular, the supply rail and / or the supply slider have an outlet opening that serves as an air support layer (air bearing) for the supply slider, and the contact piece slides along a sufficiently long region by the supply slider, taking into account the increase in the diameter of the thin film bundle of the thin film core. The supply rail and / or the supply slider are particularly connected to a compressed air supply source. The supply rail and the supply slider constitute a static pressure support part.

[0035] In particular, the supply device includes a supply slider and at least one supply operating lever that linearly moves the supply slider to precisely set the position of the supply slider.

[0036] In an embodiment of the present invention, the thin film winding device, particularly through the supply operating lever or the adjustment operating lever of the contact piece, the contact piece, particularly the contact roller, serves as a support for the winding core or the thin film bundle of the winding core with a predetermined contact pressure and / or under the control of the adjustment operating lever of the tension adjustment device, provides a control device for controlling the tension adjustment device of the supply device, particularly its cylindrical deflector, to a position where a specific thin film tension is applied to the thin film material. In this way, it is possible to control the contact pressure of the contact roller of the contact piece and / or the tension of the thin film material.

[0037] Therefore, the object of the present invention is achieved by a thin film manufacturing device including at least one thin film stretching device and a thin film winding device. The features and advantages for the thin film winding device are equally applicable to the thin film manufacturing device, and conversely, the features and advantages of the thin film manufacturing device are also applicable to the thin film winding device.

[0038] Furthermore, the object of the present invention is solved by a thin film winding method for winding a thin film material constituting a thin film for manufacturing a separator film for a battery by means of a thin film winding device and / or a thin film manufacturing device. The contact piece, in particular the contact roller, is supported against the winding core or the thin film bundle of the winding core with a preset contact pressure and / or a specific thin film tension is applied to the thin film material by a tension adjusting device, in particular a cylindrical deflector. The features and advantages applicable to the thin film winding device and / or the thin film manufacturing device are similarly applicable to the thin film winding method, and conversely, the features and advantages of the thin film winding method are also applicable to the thin film winding device or the thin film manufacturing device.

Brief Description of the Drawings

[0039] Other features and advantages of the present invention are described in the following description, and the accompanying drawings show the following content:

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0040] FIG. 1 shows a thin film manufacturing device 100 including a thin film winding device 10 according to the present invention and a thin film stretching device 110 operatively connected to the front stage of the thin film winding device 10. The thin film stretching device 110 includes a machine direction stretching device for stretching the thin film material in the machine direction, a transverse direction stretching device for stretching the thin film material in the transverse direction, or a stretching device for sequentially or simultaneously stretching the thin film material in the longitudinal direction and the transverse direction.

[0041] Using the thin film stretching device 110, a resin thin film material simply called the thin film material 12 included in the disclosure of the present invention is manufactured. For manufacturing purposes, the thin film stretching device 110 is divided into different regions 110a, 110b, 110c, 110d and 110e, but not all of the said regions are provided in the actual thin film stretching device 110.

[0042] In the various regions 110a to 110e, the thin film material 12 is exposed to different temperature atmospheres to manufacture a thin film or set specific thin film characteristics. The first region 110a is called a preheating region. The second region 110b is called a stretching region, and the third region 110c is called a reheating region. The fourth region 110d is called a neutral region, and the fifth region 110e is called a cooling region. A small number of neutral regions or additional neutral regions are provided between each of the first region 110a and the fifth region 110e, and the first region 110a to the fifth region 110e can reduce the influence between each other's regions (the air flow from one region of the first region 110a to the fifth region 110e to another region). Using the thin film stretching device 110, a thin film material 12 with a width exceeding 2m, 3m, 4m, 5m, 6m, 7m, 8m, 9m, 10m, 11m, 12m, 13m or exceeding 14m can be manufactured. For example, a thin film material 12 less than 15m, 14m, 13m, 12m, 11m, 10m, 9m, 8m, 7m, 6m, 5m, 4m or less than 3m can be manufactured.

[0043] The processing width, that is, the width of the thin film material 12 used in the thin film stretching device 110 and the thin film winding device 10 is equal to 6.2m, 10.4m or 12m.

[0044] The thin film stretching device 110 has a loading area 111 for supplying the thin film to be stretched to the thin film stretching device 110. The thin film material 12 to be stretched is discharged from the unloading area 112 of the thin film stretching device 110. The unloading area 112 of the thin film stretching device 110 is connected to the thin film inlet 14 of the thin film winding device 10 of the present invention.

[0045] It is necessary to wind different types of thin films onto the diaphragm winding device in different ways without forming wrinkles in the thin film and introducing a sufficient amount of air between the layers, and to unwind the thin film material 12 from the diaphragm winding device without problems in the next process. The winding method of the present invention does not cause cracks in the thin film material 12.

[0046] The film thickness of the thin film material 12 is less than 10 μm, particularly less than 5 μm. For example, the thin film material 12 is formed into a battery separation thin film (BSF), but it may be formed for other materials. As described above, winding of the battery separation thin film requires particularly strict conditions. Winding can be achieved only by using a low contact force and a low thin film tension.

[0047] FIG. 2 schematically shows a thin film winding device 10. The thin film winding device 10 includes a winding device 16 and a supply device 18. Further, the thin film winding device 10 includes a compressed air source 20 such as an air compressor. The compressed air source 20 can constitute a single or a plurality of connectors connected to a central compressed air source, for example, the central compressed air source of the thin film manufacturing device 100.

[0048] The thin film winding device 10 also includes a control device 22 that controls the supply device 18, the winding device 16, and the compressed air source 20. For example, the control device 22 can be provided as a part of the thin film manufacturing device 100 or independently.

[0049] The supply device 18 is arranged in front of the winding device 16 in the moving direction of the thin film material 12. In this way, the supply device 18 receives the thin film material 12 in the thin film loading area 14 and conveys it to the winding device 16.

[0050] In the embodiment of the present invention, the winding cores 24 provided on the winding device 16 are at least one, that is, two. Each winding core 24 is driven to be rotatable around the central axis. The two winding cores 24 are attached together on a rotatable base of the winding device 16, and one winding core 24 is moved to the winding position (in FIG. 2, the positions of the two winding cores 2 and the left winding core are shown). A thin film bundle 28 that receives and winds the thin film material 12 from the supply device 18 is formed on the corresponding winding core 24 at the winding position.

[0051] The supply device 18 of the illustrated embodiment includes a supply slider (supply slide) 30, at least one supply rail 32, a supply operating lever 34, a contact piece 36, a tension adjusting device 38, and two deflectors 40. The contact piece 36, the tension adjusting device 38, and the two deflectors 40 are attached to the supply slider 30. Both deflectors 40 are fixedly attached to the supply slider 30 so as not to be movable relative thereto. The contact piece 36, the tension adjusting device 38, and both deflectors 40 guide the thin film material 12 to the winding device 16 as individually shown in FIGS. 3 and 4.

[0052] The thin film material 12 introduced into the thin film loading area 14 is first deflected from the thin film loading area 14 toward the tension adjusting device 38 by one of the two deflectors 40. In the tension adjusting device 38, the thin film material 12 is further deflected and moved to the second deflector 40 provided between the tension adjusting device 38 and the contact piece 36.

[0053] In the second deflector 40, the thin film material 12 is directed toward the contact piece 36 that supplies the thin film material 12 to the winding device 16. That is, the contact piece 36 disposed adjacent to the winding core 24 deflects the thin film material 12 to the winding core 24 or the thin film bundle 28 provided on the winding core 24.

[0054] The contact piece 36 includes a contact roller 42 and a position adjusting device 44. The contact roller 42 is attached to the supply slider 30 that can move linearly by the position adjusting device 44.

[0055] In the illustrated embodiment, the tension adjusting device 38 without rollers and both deflectors 40 each have a hollow and non-rotating cylindrical deflector 54. At least the length of the cylindrical deflector 54 of the tension adjusting device 38 and the length of the deflector 40 perpendicular to the moving direction of the thin film material 12 are greater than the width of the thin film material 12.

[0056] For example, the contact roller 42, the cylindrical deflector 54 of the tension adjusting device 38, and both deflectors 40 have the same length in the direction perpendicular to the moving direction of the thin film material 12.

[0057] Each cylindrical deflector 54 has a non-circular circumferential surface 56. Unless otherwise indicated in another embodiment, the following embodiments apply specifically to each cylindrical deflector 54 and deflector 40 of the tension adjustment device 38.

[0058] The cross-section of the cylindrical deflector 54 has at least one arc segment 58, i.e., a cross-section of the circumferential surface 56 showing the arc segment. For example, the arc segment 58 is an arc. However, the arc segment 58 may form other shapes such as an ellipse or a helix.

[0059] In the illustrated embodiment, the cross-section of the cylindrical deflector 54 is a fan-shaped region including the arc segment 58 and two circular radius portions 60. The circular radius portions 60 extend from the center point of the circle to the ends of the arc 58. The angle corresponding to the arc segment 58 spans between the circular radius portions 60. In the illustrated embodiment, the angle corresponding to the arc 58 of the cylindrical portion 54 of the tensioning device 38 exceeds 180°, particularly exceeds 200°. For example, the angle corresponding to the arc segment 58 of the cylindrical deflector 54 of the first deflector 40 also exceeds 180°, particularly exceeds 200°. The angle corresponding to the arc segment 58 of the cylindrical deflector 54 of the second deflector 40 is less than 180° but exceeds 90°.

[0060] The circumferential surface 56 has a plurality of pores that open by spreading along the circumferential surface 56. The circumferential surface 56 forms a microporous surface 62 (FIG. 4) of the arc-shaped region 58. For example, the diameter of each pore is less than 900 μm, particularly less than 500 μm. The plurality of pores are dispersed particularly uniformly along the microporous surface 62, for example, in a grid pattern or a lattice pattern.

[0061] For example, the microporous surface 62 extends along at least 80%, particularly at least 90% of the length of the cylindrical deflector 54 in the axial direction of the cylindrical deflector 54. The spread of the microporous surface 62 in the circumferential direction around the axis of the cylindrical deflector 56 spreads, for example, at least 80%, particularly at least 90% of the spread of the arc segment 58 in the circumferential direction.

[0062] Even if the thin film material 12 is clamped by the supply device 18 to the circumferential surface 56 of the cylindrical deflector 54, the thin film material 12 can be arranged on the microporous surface 62 with the thin film material 12 facing each other. A compressed air connection body 64 in fluid contact with the inside of the cylindrical deflector 54 is provided on the cylindrical deflector 54.

[0063] Through the compressed air connector 64 fluidly connected to the compressed air supply source 20, compressed air is introduced into the inside of the cylindrical deflector 54, and an overpressure is generated inside the cylindrical deflector 54.

[0064] When pressurized air is introduced into the cylindrical deflector 54, the pressurized air passes to the outside through the pores of the microporous surface 62. Therefore, the thin film material 12 passing through the microporous surface 62 moves on the air buffer layer without contacting the circumferential surface 54.

[0065] In this way, damage such as scratching or defects that may occur on the thin film material 12 can be avoided, the quality of the thin film material 12 can be improved, and defective products can be reduced. In addition, since the air buffer layer can compensate for the lateral misalignment of the thin film material 12 on the plurality of cylindrical deflectors 54 and the lateral misalignment of the thin film material 12 with respect to the contact roller 42 to a certain extent, a complicated alignment device for the thin film material 12 between the plurality of rollers is not required.

[0066] Similarly, the contact roller 42 is attached to the cylindrical deflector 54 of the tension adjusting device 38 by at least one position adjusting device 44 that can linearly move with respect to the supply slider 30. In the illustrated embodiment, a pair of position adjusting devices 44 are attached to each end of the cylindrical deflector 54 of the tension adjusting device 38.

[0067] FIG. 5 illustrates a side view of attaching the cylindrical deflector 54 of the tension adjusting device 38 between a pair of position adjusting devices 44, and FIG. 6 is a perspective view showing details of one of the position adjusting devices 44. The contact roller 42 is attached to the supply slider 30 in a similar manner by one or two position adjusting devices 44 of the contact piece 36.

[0068] The position adjusting device 44 includes an adjusting rail 46, an adjusting slider 48, and an adjusting operating rod 50. The adjusting rail 46 is fixed to the supply rail 32, and the cylindrical deflector 54 is attached to the adjusting slider 48. Since the adjusting slider 48 is attached to the adjusting rail 46 so as to be linearly slidable, the cylindrical deflector 54 moves linearly with respect to the supply slider 30.

[0069] In the illustrated embodiment, an air support layer is provided in the position adjusting device 44. For this purpose, the adjusting rail 46 and / or the adjusting slider 48 are provided with, for example, a plurality of air outlets, and an air support layer is formed between the adjusting slider 48 and the adjusting rail 46. The adjusting slider 48 or the adjusting rail 46 is connected to the compressed air source 20 via, for example, a compressed air connector 52. However, a static pressure support portion may be provided in the position adjusting device 44.

[0070] The cylindrical deflector 54 of the tension adjusting device 38 is attached to the adjusting slider 48 or one end of the two adjusting devices 44. The adjusting operating rod 50 connected to the adjusting slider 48 is driven by, for example, an electric motor or a piezoelectric operating rod to linearly move the adjusting slider 48.

[0071] The adjusting operating rod 50 is connected to a control device 22 that transmits data and / or control command signals, for example, wirelessly or wired. An adjusting operating rod 50 may be provided in the position adjusting device 44.

[0072] The cylindrical deflector 54 of the tension adjusting device 38 may be attached to the adjusting slider 48 in the same manner as the contact roller 42 of the contact piece 36. Further, the entire supply slider 30, the contact piece 36, the tension adjusting device 38, and the deflector 40 can be provided so as to be able to move forward and backward or linearly approach and separate from the winding device 16.

[0073] For example, the supply rail 32 and / or the supply slider 30 have exhaust ports, and an air support layer described in the position adjusting device 44 is provided in the supply slider 30. For this purpose, the supply rail 32 and the supply slider 30 are fluid-connected to the compressed air source 20. However, a static pressure support portion may be formed in the supply rail 32 and the supply slider 30.

[0074] A supply operating rod 34 for linearly moving the supply slider 30 is attached to the supply slider 30. The linear motion of the supply slider 30 is parallel to the linear motion of the position adjusting device 44.

[0075] Similar to the adjustment operating rod 50, the supply operating rod 34 is connected to the control device 22, and for example, data and / or control command signals are transmitted from the control device 22 to the supply operating rod 34 through wireless or wired means. During the operation of the thin film winding device 10, the contact piece 36 is rotated in the direction shown by the pair of reverse arrows in FIG. 1, and the thin film material winding method of the present invention is implemented. According to the command signal of the control device 22, the thin film material winding method of the present invention is executed to operate the thin film winding device of the present invention.

[0076] The control device 22 controls the operations of the supply operating rod 34, the adjustment operating rod 50 of the tension adjusting device 38 and / or the adjustment operating rod 50 of the contact piece 36 to move the cylindrical deflector 54 of the tension adjusting device 38 and the contact roller 42 of the contact piece 36, or to linearly move the entire supply slider 30, the cylindrical deflector 54 of the tension adjusting device 38 and the contact roller 42 of the contact piece 36 linearly in a retractable manner with respect to the winding core 24 or the thin film bundle 28 on the winding core 24 and the winding device 16.

[0077] By controlling the supply operating rod 34, the adjustment operating rod 50 and the cylindrical deflector 54 of the tension adjusting device 38, a specific thin film tension can be applied to the thin film material 12. Therefore, by applying a specific thin film tension to the thin film material 12 by the tension adjusting device 38, the contact roller 42 constituting the floating roller can surely achieve a predetermined function.

[0078] In addition, since the control device 22 sets the position of the contact roller 42 of the contact piece 36, the contact roller 42 can support the thin film bundle 28 attached to the winding core 24 or the winding core 24 with a preset contact pressure.

[0079] For example, when using a cylindrical deflector 54 that is lighter in weight than the deflection roller, the weights of the tension adjusting device 38, the supply slider 30, and the assembly are reduced, so that the movement performance of the thin film material 12 becomes more controllable. Further, the cylindrical deflector 54 that guides the thin film material 12 becomes a non-rotating air buffer. Since friction occurs between the thin film material 12 and the non-rotating roller, a rotational force that first overcomes the inertial force of the roller must be set on the thin film material 12. By using the cylindrical deflector 54, the thin film tension is set over a very wide range, and the quality of the thin film to be manufactured is further improved.

[0080] FIG. 7 shows a second embodiment of the thin film winding device 10 that substantially corresponds to the first embodiment. Only the differences between the second embodiment and the first embodiment will be described below, and the same reference numerals are given to the same parts shown in FIG. 2 and the equivalent parts shown in FIG. 7.

[0081] The thin film winding device 10 according to the second embodiment includes a single, i.e., a first deflector 40, which is disposed in front of the tension adjusting device 38 in the conveying direction of the thin film material 12.

[0082] The thin film material 12 in FIG. 7 passes through the tension adjusting device 38 and its cylindrical deflector 54 and is conveyed to the contact piece 36 and the contact roller 42. Since the second deflector 40 is omitted, the complexity of the supply device 18 is reduced, and the weight is further reduced, so that the dynamic performance is improved and a pressure setting over a wide dynamic range is possible.

Claims

1. A thin film winding apparatus having a winding device (16) and a supplying device (18) for winding an extremely thin film material (12) into a thin film bale (28), The winding device (16) includes at least one winding core (24) for winding the film (12) to form a film bale (28); The supply device (18) includes a supply slider (30), a contact piece (36), and at least one tension adjustment device (38); The contact piece (36) of the supply device (18) is attached to the supply slide (30) adjacent the winding core (24) and guides the thin film material (12) from the contact piece (36) to the winding core (24) or to the thin film pack (28) of the winding core (24); A tension adjusting device (38) for adjusting the tension of the thin film material (12) is attached to the feed slider (30) in front of the contact piece (36) in the moving direction of the thin film material (12), The tension adjustment device (38) comprises a cylindrical deflector (54) having a circumferential surface (56) and an arcuate cross section (58), the circumferential surface (56) of the cylindrical deflector (54) having a microporous surface (62) formed in the area of ​​the arcuate cross section (58).

2. 2. A thin film winding device according to claim 1, wherein the arcuate cross section (58) corresponds to an angle of at least 90°, in particular an angle of at least 180°, optimally an angle of at least 200°.

3. 3. A thin film winding device according to claim 1 or 2, wherein the microporous surface (62) has a diameter of less than 900 μm, in particular less than 500 μm.

4. The feed device (18) includes at least one deflector (40) attached to the feed slide (30), the deflector (40) deflecting the direction of travel of the thin film material (12) between the tension adjustment device (38) and the contact piece (36) or in front of the tension adjustment device (38); 4. The thin film winding device according to claim 1, wherein the at least one deflector (40) comprises a cylindrical deflector (54) having a circumferential surface (56) and an arcuate cross section (58), the circumferential surface (56) having at least one micro-perforated surface (62) formed in the area of ​​the arcuate cross section (58).

5. 5. The thin film winding device according to claim 1, wherein the tension adjusting device and / or the deflector comprises a cylindrical deflector having a compressed air connector for introducing compressed air into the cylindrical deflector.

6. 6. A thin film winding device according to claim 1, wherein the thickness of the thin film material (12) is less than 10 μm, in particular less than 5 μm.

7. The contact piece (36) of the supply device (18) includes at least one position adjustment device (44) having a contact roller (42), an adjustment rail (46) and an adjustment slider (48); 7. The thin film winding device according to claim 1, wherein the contact roll (42) of the position adjustment device (44) is mounted so as to be movable, in particular linearly movable, relative to the supply slide (30) by means of at least one position adjustment device (44).

8. The tension adjustment device (38) includes at least one position adjustment device (44) having an adjustment rail (46) and an adjustment slider (48); 8. A thin-film winding device according to claim 1, wherein the cylindrical deflector (54) of the tension adjusting device (38) is mounted so as to be movable, in particular linearly movable, relative to the supply slide (30) by means of at least one position adjusting device (44).

9. 9. A thin film winding device according to claim 7 or 8, characterized in that the adjustment rail (46) and / or the adjustment slide (48) are provided with an output opening forming an air support layer for the adjustment slide (48).

10. 10. The thin film winding device according to claim 7, wherein the at least one position adjusting device (44) comprises at least one adjusting operating rod (50) which moves linearly on its adjusting slider (48).

11. 11. The thin film winding apparatus according to claim 7, wherein the feed device (18) comprises at least one feed rail (32) for guiding the movement of its feed slide (30), and the feed rail (32) and / or the feed slide (30) comprises an output opening forming an air support layer for the feed slide (30).

12. 12. The thin film winding apparatus according to claim 1, wherein the supply device (18) comprises at least one supply operating rod (34) that moves linearly on its supply slide (30).

13. The thin film winding device (10) includes a control device (22) that controls the supply device (18), The control device (22) controls the feeding device (18) through the feeding lever (34) and / or the adjusting lever (50) of the contact piece (36) to support the contact piece (36), in particular the contact roller (42), with a preset contact pressure against the winding core (24) or the thin film bales (28) of the winding core (24); 13. The thin film winding device according to claim 1, wherein the tension adjusting device (38) or the cylindrical deflector (54) thereof applies a specific thin film tension to the thin film material (12) by controlling an adjustment operating rod (50) of the tension adjusting device (38).

14. A thin film manufacturing apparatus comprising a thin film winding device (10) according to any one of claims 1 to 13 and at least one thin film stretching device (110).

15. A method for winding a thin film material (12), in particular a thin film material to be formed into a separator film for batteries, by means of a thin film winding device (10) according to any one of claims 1 to 13 and / or a thin film production device (100) according to claim 14, A method for winding a thin film material, characterized in that the contact piece (36) of the supply device (18) or its contact roller (42) supports a predetermined contact pressure and / or a specific thin film tension acting on the thin film material (12) against the winding core (24) or its thin film bale (28) by means of a tension adjustment device (38) or its cylindrical deflector (54).

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