Track system of transverse stretching equipment provided with isolating membrane width adjusting device

Abstract

The invention relates to a rail system of transverse stretching equipment provided with an isolating membrane width adjusting device. The track system comprises a track for adjusting the angle when the width of the isolating membrane is adjusted; the rail steel plates are respectively attached to two side surfaces of the rail; a rotating plate on which an end portion of the rail is placed and fixed; a disc for rotatably assembling the rotating plate and changing the angle of a track around the disc; a fixed plate that moves in the width direction in order to compensate for the length of the rail when moving in the width direction of the rail; and a moving plate that moves linearly in the longitudinal direction of the rail so as to compensate for the length of the rail of which the angle is adjusted.

Description

Technical Field

[0001] The invention relates to a track system of a transverse stretching device provided with an isolation film width adjustment device. Background Art

[0002] Generally, in the process of manufacturing a secondary battery separator, a dry separator process is used to form pores by stretching an extruded polypropylene (PP) film or a wet separator process is used to form pores by solvent extruding a polyethylene (PE) film.

[0003] In the case of a dry separator process, pores are formed by mechanical force, and thus it is difficult to form uniform pores.

[0004] In the case of the wet isolation membrane process, its advantages are that it is beneficial to electronic devices that need to maintain quantitative output and battery performance for a long time, excellent mechanical strength, formation of homogeneous pores and stable process, but its disadvantages are high process cost and low thermal stability.

[0005] Among them, the production process of the wet isolation membrane includes extrusion of the raw material mixed with oil (wax) for forming pores, longitudinal stretching (MDO) process after casting (Casting), first transverse stretching (TDO, 1st) process, oil (wax) extraction process, and second transverse stretching (TDO, 2st) process.

[0006] As the energy density of secondary batteries gradually increases, the thickness of wet-process separators gradually becomes thinner and requires high thickness uniformity.

[0007] In addition, in order to improve the productivity of wet-process separator production equipment and reduce production costs, the width of the separator is increasing and the production speed is increasing. Therefore, each process is becoming longer and wider, and it is necessary to be able to adjust the process conditions according to various conditions.

[0008] In this case, in the transverse direction stretching (TDO) process, the track length of the clips becomes longer and the clip spacing increases. In addition, in order to achieve the required thickness, it is necessary to create an optimal clip path, so the clip spacing, that is, the stretching width, needs to be adjusted in each chamber interval.

[0009] That is, in the past, there was a width adjustment function, but the width was increased in order to speed up the production and increase the output, and the transverse direction stretching (TDO) process was extended and the width adjustment amount was increased in order to produce a uniform film. Therefore, the path of the track became wider, and when the exit was fixed, the straight length of the track to the entrance changed, so it was necessary to correct this.

[0010] Therefore, a width adjustment device is needed that can adjust the width in the track path and correct the straight length from the exit to the entrance.

[0011] However, the conventional separator stretching equipment does not include the width adjustment device as described above, and thus there is a problem in that the operability and productivity when stretching the separator are reduced.

[0012] Furthermore, when the widthwise pitch of the rails is adjusted using the existing transverse orientation device (TDO), there is a problem that the total length of the rails is shortened due to the narrowing of the pitch between the rails.

[0013] Furthermore, the clamps provided on the track and holding the separator sheet move along the track steel plates attached to the track. The track steel plates bend according to the adjustment of the widthwise spacing of the track, and therefore require bending rigidity above a specified strength, but this requirement is difficult to meet.

[0014] Therefore, there is a problem that the product productivity and quality of the manufactured separator are reduced due to damage of the rail steel plate or insufficient bending rigidity.

[0015] Prior art literature

[0016] Patent Literature

[0017] Patent Document 1: Korean Patent Gazette No. 10-1858566 (Invention Title: Method and Apparatus for Manufacturing Secondary Battery Separator, Published on January 4, 2018)

[0018] Patent Document 2: Korean Patent Publication No. 10-1561971 (Invention Title: Manufacturing System for Separator for Secondary Battery, published on April 14, 2015) Summary of the invention

[0019] The present invention is proposed in view of the problems mentioned above, and its object is to provide a track system of a transverse stretching equipment provided with a separation film width adjustment device, that is, to effectively correct the total track length adjusted according to the width direction spacing of the track, so as to manufacture a better quality separation film by ensuring linearity when stretching the separation film.

[0020] According to a preferred embodiment for achieving the above-mentioned purpose of the present invention, the track system of the transverse stretching equipment of the present invention provided with an isolation film width adjustment device includes: a track, which is arranged inside the chamber of the stretching equipment, and each end is connected to a pair of track fixing plates to adjust the angle when adjusting the width of the isolation film; a track steel plate, which is respectively attached to the two side surfaces of the above-mentioned track to form a movable device for holding the clamp of the isolation film; a rotating plate, which is respectively assembled at the lower part of the above-mentioned track fixing plate to place and fix the ends of the above-mentioned track; a disc, which enables the above-mentioned rotating plate to be assembled in a rotatable manner to change the angle of the track with the above-mentioned disc as the center; a fixed plate, when it moves along the guide rail in the width direction of the above-mentioned track through the rotation of an axis set on one side of the above-mentioned track, moves in the width direction to compensate for the length of the above-mentioned track; and a movable plate, which is assembled between the above-mentioned fixed plate and the above-mentioned disc, and moves linearly along the length direction of the above-mentioned track to compensate for the length of the above-mentioned track whose angle is adjusted.

[0021] The track is made of a pair of square pipes, and the track fixing plates connected to the track are rotatably connected to each other through upper connecting pieces.

[0022] The disc is annular in shape, and the rotating plate is assembled on the inner circumference of the disc.

[0023] When the track moves, each rotating plate moves along the inner circumference of the disk.

[0024] The fixing plate includes blocks respectively arranged at both sides of the upper end portion along the length direction of the rail.

[0025] The moving plate is slidably arranged between the blocks so that the moving plate can only move along the length direction of the track.

[0026] At the lower part of the fixing plate, a pair of bearings are arranged on both sides of the guide rail and guide the movement of the fixing plate.

[0027] The shaft moves along the bolt by rotating, so that the fixing plate moves along the guide rail.

[0028] The rail steel plate includes: a first steel plate attached to the rail; a second steel plate attached to the first steel plate; and a third steel plate attached to the second steel plate.

[0029] The second steel plate has a slit formed therein, and provides bending strength to the rail steel plate based on movement of the rail.

[0030] The connecting portion between the rail steel plates includes a protrusion and a groove, and the rail steel plates are connected in a state where the protrusion is inserted into the groove.

[0031] A downwardly inclined surface is formed on the coupling surface of the groove portion, and an upwardly inclined surface is formed on the coupling surface of the protrusion portion. When the rail steel plates are coupled, the downwardly inclined surface and the upwardly inclined surface are coupled to each other.

[0032] According to the track system of the transverse stretching equipment provided with the separator width adjustment device of the present invention, the total length of the track is effectively corrected based on the adjustment of the width direction pitch of the track, and a better quality separator can be manufactured by ensuring linearity when stretching the separator.

[0033] Furthermore, the functionality of the transverse stretching equipment is improved, thereby enabling more efficient regulation of the transverse stretching transition.

[0034] In addition, the function of the track steel plate moved by the clamps of the transverse stretching equipment is improved, and the bending strength of the track steel plate generated when adjusting the width of the track is strengthened, thereby improving the product productivity and quality of the manufactured isolation membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A diagram showing a rail system of a transverse stretching device provided with a separator width adjustment device according to an embodiment of the present invention.

[0036] Figure 2 FIG. 1 is a diagram showing the structure of a width adjustment device according to an embodiment of the present invention.

[0037] Figure 3 It is a diagram showing the working state of the width adjustment device according to an embodiment of the present invention.

[0038] Figure 4 FIG. 1 is a diagram showing a disk of a width adjustment device according to an embodiment of the present invention.

[0039] Figure 5 The figure shows a rail steel plate of a rail system according to an embodiment of the present invention.

[0040] Figure 6 FIG. 1 is a diagram showing a second steel plate of a rail steel plate according to an embodiment of the present invention.

[0041] Figure 7 It is a diagram showing the structure of a joint portion of rail steel plates according to an embodiment of the present invention.

[0042] Figure 8 This is a diagram showing an enlarged structure of a joint portion of rail steel plates according to an embodiment of the present invention.

[0043] Fig. 9 A diagram showing a rail system of a transverse stretching device according to an embodiment of the present invention.

[0044] Fig.10A diagram illustrating the width adjustment principle of a width adjustment device according to an embodiment of the present invention.

[0045] Description of Reference Numerals

[0046] 1: Width adjustment device 2: Chamber

[0047] 10: Track 11: Track fixing plate

[0048] 12: Connector 20: Track steel plate

[0049] 20a: Steel plate connection hole 21: First steel plate

[0050] 22: Second steel plate 22a: Gap

[0051] 23: Third steel plate 24: Protrusion

[0052] 24a: upward inclined surface 25: groove portion

[0053] 25a: downwardly inclined surface 30: rotating plate

[0054] 40: disc 50: fixed plate

[0055] 51: Block 60: Moving Plate

[0056] 70: shaft 71: guide rail

[0057] 72: Bearing 100: Transverse stretching equipment DETAILED DESCRIPTION

[0058] Hereinafter, with reference to the accompanying drawings, an embodiment of a track system of a transverse stretching device provided with a separator width adjustment device of the present invention is described. In this case, the present invention is not limited or restricted to the embodiment. In addition, in the process of describing the present invention, the specific description of the known functions or structures may be omitted in order to clarify the main purpose of the present invention.

[0059] Figure 1 A diagram showing a rail system of a transverse stretching device provided with a separator width adjustment device according to an embodiment of the present invention. Figure 2 FIG. 1 is a diagram showing the structure of a width adjustment device according to an embodiment of the present invention. Figure 3 It is a diagram showing the working state of the width adjustment device according to an embodiment of the present invention. Figure 4 FIG. 1 is a diagram showing a disk of a width adjustment device according to an embodiment of the present invention.

[0060] Reference Figures 1 to 4The track system of the transverse stretching equipment provided with the isolation film width adjustment device 1 of the present invention includes a track 10, a track steel plate 20, a rotating plate 30, a disc 40, a fixed plate 50 and a movable plate 60. The above-mentioned width adjustment device 1 can adjust the width of the isolation film to be stretched by adjusting the angle of the track 10.

[0061] In this embodiment, the rails 10 are arranged inside the chamber of the stretching equipment, and the ends of each rail 10 are connected to a pair of rail fixing plates 11 to adjust the angle when adjusting the width of the isolation film. The rail steel plates 20 are respectively attached to the two sides of the rails 10 to form a moving device for holding the clamp of the isolation film. The clamp is supported by the rails 10 and moves along the rail steel plates 20.

[0062] Furthermore, the rotating plates 30 of the width adjustment device 1 are respectively assembled at the lower part of the track fixing plate 11 to place and fix the end of the track 10 , and the rotating plates 30 are rotatably assembled on the disc 40 to change the angle of the track 10 with the disc 40 as the center.

[0063] Furthermore, when the fixed plate 50 of the width adjustment device 1 moves in the width direction of the track 10 along the guide rail 71 by rotating the shaft 70 provided on one side of the track 10, it moves in the width direction (Y-axis direction) in order to compensate for the track length. The movable plate 60 is assembled between the fixed plate 50 and the disk 40, and moves in a straight line along the length direction (X-axis direction) of the track 10 to compensate for the track length whose angle is adjusted.

[0064] That is, the width adjustment device 1 is arranged at the track connecting part of the transverse stretching equipment, and adjusts the angle of the track 10 to stretch the isolation film along the width direction. The fixed plate 50 can move along the width direction of the shaft 70 to adjust the angle of the track 10. The movable plate 60 can move along the length direction of the track 10 to compensate for the track length that changes according to the angle.

[0065] Furthermore, the rail 10 provided in the transverse stretching device is made of a pair of square pipes, and the rail fixing plates 11 connected to the rail 10 are rotatably connected to each other via an upper connecting piece 12 .

[0066] The disk 40 is annular, and the rotating plates 30 are assembled on the inner circumference of the disk 40. When the track 10 moves, each rotating plate 30 moves along the inner circumference of the disk 40. If the stretching width of the isolation film changes, the angles of the two tracks 10 are changed with the disk 40 as the center.

[0067] In this embodiment, the fixed plate 50 of the width adjustment device 1 includes blocks 51 respectively arranged on both sides of the upper end along the length direction of the track 10, and a movable plate 60 is slidably arranged between the blocks 51, so that the movable plate 60 can only move along the length direction of the track 10.

[0068] Furthermore, at the lower portion of the fixing plate 50 , a pair of bearings 72 are provided on both sides of the guide rail 71 to guide the movement of the fixing plate 50 . The shaft 70 moves along the bolt by rotating, so that the fixing plate 50 moves along the guide rail 71 .

[0069] That is, when the shaft 70 of the above-mentioned width adjustment device 1 rotates, the fixed plate 50 moves along the axial direction (Y-axis direction) of the guide rail 71, thereby adjusting the stretching width of the isolation membrane. When the stretching width changes, the movable plate 60 and its upper structure move left and right in a straight line along the length direction (X-axis direction) of the track 10 according to the length of the track.

[0070] Therefore, the total length of the rail 10 can be effectively corrected based on the adjustment of the width direction pitch of the rail 10 by the width adjustment device 1, thereby ensuring linearity when stretching the separator.

[0071] Figure 5 The figure shows a rail steel plate of a rail system according to an embodiment of the present invention. Figure 6 FIG. 1 is a diagram showing a second steel plate of a rail steel plate according to an embodiment of the present invention. Figure 7 It is a diagram showing the structure of a joint portion of rail steel plates according to an embodiment of the present invention. Figure 8 This is a diagram showing an enlarged structure of a joint portion of rail steel plates according to an embodiment of the present invention.

[0072] Reference Figures 5 to 8 The track steel plate 20 of the track system of the present invention includes: a first steel plate 21, attached to the above-mentioned track 10; a second steel plate 22, attached to the above-mentioned first steel plate 21; and a third steel plate 23, attached to the above-mentioned second steel plate 22, wherein the above-mentioned second steel plate 22 is formed with a gap 22a, which gives bending strength to the track steel plate 20 based on the movement of the track 10, thereby making the track steel plate 20 easier to bend.

[0073] Furthermore, the rail steel plate 20 is provided with steel plate connection holes 20 a at intervals for connecting the plurality of steel plates to each other. The first steel plate 21 , the second steel plate 22 , and the third steel plate 23 are connected to each other by inserting a coupling member into the steel plate connection holes 20 a .

[0074] That is, the number of the rail steel plates 20 is reduced from the existing four to three, thereby simplifying the process of manufacturing the rail steel plates 20, and reducing the number of processes to reduce costs and improve economic benefits.

[0075] The second steel plate 22 is thicker than the first steel plate 21 or the third steel plate 23 , and thus a gap 22 a is formed therein to facilitate bending. When the rail 10 moves, the rail steel plate 20 is more easily bent by the gap 22 a .

[0076] In the present embodiment, a protrusion 24 and a groove 25 are respectively formed at both ends of the rail steel plate 20 for connecting the rail steel plates 20 to each other.

[0077] A downwardly inclined surface 25 a is formed on the coupling surface of the groove portion 25 , and an upwardly inclined surface 24 a is formed on the coupling surface of the protrusion 24 . When the rail steel plates 20 are coupled, the downwardly inclined surface 25 a and the upwardly inclined surface 24 a are coupled to each other.

[0078] That is, when the above-mentioned rail steel plates 20 are connected to the rail steel plates 20, the protrusion 24 formed at the connecting portion of the rail steel plate 20 is combined with the groove portion 25 of the other rail steel plate 20. In this case, the downward inclined surface 25a formed at the above-mentioned protrusion 24 can be placed and fixed on the upward inclined surface 24a formed at the above-mentioned groove portion 25, thereby connecting the rail steel plates 20 in a more stable state.

[0079] Fig. 9 A diagram showing a rail system of a transverse stretching device according to an embodiment of the present invention.

[0080] Reference Fig. 9 The transverse stretching equipment 100 is provided with a plurality of chambers 2 for stretching the isolation film, a track 10 is arranged inside the above-mentioned chamber 2, a width adjustment device 1 is arranged at the connection part between the above-mentioned track 10 and the track 10, and a plurality of the above-mentioned width adjustment devices 1 are arranged transversely along the stretching interval of the chamber 2.

[0081] That is, in the spacing between rails 10 and rails 10 set along the width direction by the rail system of the transverse stretching equipment 100, the rails 10 move from the state where the width between the rails 10 and 10 is the smallest to the state where the width between the rails 10 and 10 is the largest through the operation of the above-mentioned width adjustment device 1.

[0082] Fig.10 A diagram illustrating the width adjustment principle of a width adjustment device according to an embodiment of the present invention.

[0083] Reference Fig.10 The width adjustment principle of the width adjustment device 1 is as follows: under the condition that the lengths of the above-mentioned chambers 2 are the same, the track length is selected by the intersection point with the basic width reference chamber 2. In each chamber 2, the position of the above-mentioned intersection point is different according to the stretching ratio.

[0084] The width adjustment device 1 is designed to be located at the intersection with the chamber 2 when the basic width is located. When the width is expanded / contracted, the position of the track 10 changes according to the rotation radius of the track 10, so that the moving plate 60 of the width adjustment device 1 can fully compensate for the changed distance.

[0085] Therefore, by effectively correcting the total length of the rail 10 based on the adjustment of the width direction pitch of the rail 10 by the width adjustment device 1, a better quality separator can be manufactured by ensuring linearity when stretching the separator.

[0086] Furthermore, the functionality of the transverse stretching apparatus 100 is enhanced so that the transverse stretching transition can be more effectively regulated.

[0087] Furthermore, the function of the track steel plate 20 moved by the clamps of the transverse stretching device 100 is improved, and the bending strength of the track steel plate 20 generated when adjusting the width of the track 10 is strengthened, thereby improving the product productivity and quality of the manufactured isolation membrane.

[0088] Although the present invention is shown and described with reference to the preferred embodiments for illustrating the principles of the present invention, the present invention is not limited to the structures and functions shown and described. It should be understood by those skilled in the art that various modifications and variations can be made to the present invention without departing from the concept and scope of the attached invention claims.

Claims

1. A track system for a transverse stretching device, characterized in that: include: A track is disposed inside the chamber of the stretching device, each end of which is connected to a pair of track fixing plates to adjust the angle when adjusting the width of the isolation film; Track steel plates are attached to the two sides of the track to form a moving device for holding the clamp of the isolation membrane; Rotating plates are respectively assembled on the lower parts of the track fixing plates to place and fix the ends of the track; A disc, which enables the rotating plate to be assembled in a rotatable manner, and changes the angle of the track with the disc as the center; a fixed plate that moves in a width direction of the track to compensate for the length of the track when the fixed plate moves in a width direction of the track along the guide rail by rotating a shaft provided at one side of the track; and The moving plate is assembled between the fixed plate and the disc, and moves linearly along the length direction of the track to compensate for the length of the track whose angle is adjusted.

2. The track system of the transverse stretching equipment according to claim 1, characterized in that: The rotating plates are assembled on the inner circumferential surface of the disk, and when the track moves, each rotating plate moves along the inner circumferential surface of the disk.

3. The track system of the transverse stretching equipment according to claim 1, characterized in that: The fixing plate includes blocks respectively arranged at both sides of the upper end portion along the length direction of the rail.

4. The track system of the transverse stretching equipment according to claim 3, characterized in that: The moving plate is slidably arranged between the blocks so that the moving plate can only move along the length direction of the track.

5. The track system of the transverse stretching equipment according to claim 1, characterized in that: The shaft moves along the bolt by rotating, so that the fixing plate moves along the guide rail.

6. The track system of the transverse stretching equipment according to claim 1, characterized in that: The rail steel plate includes: a first steel plate attached to the rail; a second steel plate attached to the first steel plate; and a third steel plate attached to the second steel plate.

7. The track system of the transverse stretching device according to claim 6, characterized in that: The second steel plate has a slit formed therein, and provides bending strength to the rail steel plate based on movement of the rail.

8. The track system of the transverse stretching device according to claim 6, characterized in that: The connecting portion between the rail steel plates includes a protrusion and a groove, and the rail steel plates are connected in a state where the protrusion is inserted into the groove.

9. The rail system of the transverse stretching device according to claim 8, characterized in that: A downwardly inclined surface is formed on the coupling surface of the groove portion, and an upwardly inclined surface is formed on the coupling surface of the protrusion portion. When the rail steel plates are coupled, the downwardly inclined surface and the upwardly inclined surface are coupled to each other.

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