Rewinding device, film forming device, and rewinding method

Abstract

To provide a rewinding device, a film forming device and a rewinding method that can facilitate rewinding of a film.SOLUTION: A rewinding device has a roll 110, a cutter 150 and a roll 120. The roll 110 is positioned below the cutter 150 and pushes a film FL downward to bring the film FL closer to the roll 120, and when the film FL breaks, the cutter 150 cuts the film FL between the roll 110 and the roll 120, and the cut film FL is wound onto the roll 510 of a scrap winder 500 positioned below the roll 110.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present disclosure relates to a rewinding device, a film forming device, and a rewinding method.

Background Art

[0002] Patent Document 1 discloses a longitudinal stretching device and a transverse stretching device. After the film is longitudinally stretched by the longitudinal stretching device, it is transversely stretched by the transverse stretching device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] [[ID=3了5]]When the film breaks in the transverse stretching device, the film is manually rewound onto the paper tube of the scrap winder. Therefore, it takes time until the operator arrives and performs the rewinding. If the film stays in the transverse stretching device during that time, it will take time and effort to clean.

[0005] Other problems and novel features will become apparent from the description of this specification and the accompanying drawings.

Means for Solving the Problems

[0006] A rewinding device according to one embodiment comprises a first roll extending in a first direction, a cutter extending in the first direction for cutting the film, and a second roll extending in the first direction, wherein the first roll is positioned on one side of the cutter in a second direction perpendicular to the first direction, and the second roll is positioned on the other side of the cutter in the second direction, and the first roll, the cutter, and the second roll receive the film supplied from the one side of the first roll in the second direction, and from one side of the first roll in a third direction perpendicular to the first and second directions, and from the third direction of the cutter. The first roll is positioned to discharge the film through one side in the third direction and the other side of the second roll in the third direction, and the first roll pushes the film towards the second roll by pushing it towards one side in the third direction, and when the film breaks on the other side of the second roll in the second direction, the cutter cuts the film between the first roll and the second roll, and the cut film is wound onto a winder roll of a scrap winder positioned on one side of the first roll in the third direction.

[0007] A film forming apparatus according to one embodiment comprises the rewinding apparatus described above, a first stretching apparatus located on one side of the rewinding apparatus in the second direction, and a second stretching apparatus located on the other side of the rewinding apparatus in the second direction, wherein the film supplied from the first stretching apparatus is supplied to the second stretching apparatus through the rewinding apparatus.

[0008] A rewinding method according to one embodiment is a rewinding method using a rewinding device comprising a first roll extending in a first direction, a cutter extending in the first direction for cutting the film, and a second roll extending in the first direction, wherein the first roll is positioned on one side of the cutter in a second direction perpendicular to the first direction, and the second roll is positioned on the other side of the cutter in the second direction, the method comprising the steps of detecting the breakage of the film discharged from the rewinding device with a detection unit, and the process of supplying the film from the one side of the first roll in the second direction to one side of the first roll in a third direction perpendicular to the first and second directions, the one side of the cutter in the third direction, and the The process includes the steps of: discharging the film through the other side of the two rolls in the third direction to the other side of the second roll; bringing the film closer to the second roll by having the first roll push the film to the one side in the third direction; if the film breaks on the other side of the second roll to the second roll, causing the cutter to cut the film between the first roll and the second roll; and rewinding the film onto a winder roll of a scrap winder located on the one side of the first roll in the third direction, wherein in the cutting step, the cut film is wound onto the winder roll. [Effects of the Invention]

[0009] According to the above embodiment, a rewinding device, a film forming device, and a rewinding method can be provided that facilitate the rewinding of film. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram illustrating a film forming apparatus according to Embodiment 1. [Figure 2] This is a schematic diagram illustrating a configuration in which a scrap winder is combined with the automatic rewinding device according to Embodiment 1. [Figure 3]This is a schematic diagram illustrating a configuration in which the automatic rewinding device and the scrap winder according to Embodiment 1 are separated. [Figure 4] This is a schematic diagram illustrating the configuration of an automatic rewinding device according to Embodiment 1. [Figure 5] This is a schematic diagram illustrating a configuration in which a film is passed through an automatic rewinding device according to Embodiment 1. [Figure 6] This is a schematic diagram illustrating the configuration during molding when a film is set in the automatic rewinding device according to Embodiment 1. [Figure 7] This is a schematic diagram illustrating the configuration when a film break is detected in the automatic rewinding device according to Embodiment 1. [Figure 8] This is a schematic diagram illustrating the temporary winding configuration of the scrap winder in the automatic winding device according to Embodiment 1. [Figure 9] This is a schematic diagram illustrating a detection unit for detecting film breakage in an automatic rewinding device according to Embodiment 1. [Figure 10] This flowchart illustrates a method for rewinding film using the automatic rewinding device according to Embodiment 1. [Modes for carrying out the invention]

[0011] For clarity of explanation, the following descriptions and drawings have been omitted and simplified as appropriate. Furthermore, the same elements are denoted by the same reference numerals in each drawing, and redundant explanations have been omitted where necessary.

[0012] (Embodiment 1) The automatic rewinding device and film forming apparatus according to Embodiment 1 will now be described. Figure 1 is a schematic diagram illustrating the film forming apparatus according to Embodiment 1. As shown in Figure 1, the film forming apparatus 1 includes an automatic rewinding device 100, a longitudinal stretching device 200, and a transverse stretching device 300. The automatic rewinding device 100 is positioned between the longitudinal stretching device 200 and the transverse stretching device 300. Therefore, in the film forming apparatus 1, the longitudinal stretching device 200, the automatic rewinding device 100, and the transverse stretching device 300 are arranged in a line in this order.

[0013] The film forming apparatus 1 longitudinally stretches the film FL by the longitudinal stretching apparatus 200 and laterally stretches the film FL by the lateral stretching apparatus 300. In the figure, the Y-axis direction in which the longitudinal stretching apparatus 200, the automatic rewinding apparatus 100, and the lateral stretching apparatus 300 are arranged corresponds to the longitudinal direction of the film FL, and the X-axis direction orthogonal to the longitudinal direction corresponds to the lateral direction of the film FL. The film FL supplied to the film forming apparatus 1 may be supplied by flattening the material extruded from the extruder 401 by the casting roll 402. The film FL stretched by the film forming apparatus 1 may be wound by the take-up reel 403.

[0014] Thus, the film forming apparatus 1 includes the automatic rewinding apparatus 100, the longitudinal stretching apparatus 200 located on the -Y-axis direction side of the automatic rewinding apparatus 100, and the lateral stretching apparatus 300 located on the +Y-axis direction side of the automatic rewinding apparatus 100. The film FL supplied from the longitudinal stretching apparatus 200 is supplied to the lateral stretching apparatus 300 through the automatic rewinding apparatus 100. Thereby, the film forming apparatus 1 forms the stretched film FL.

[0015] Next, the automatic rewinding apparatus 100 will be described. FIG. 2 is a schematic diagram illustrating a configuration in which a scrap winder 500 is combined with the automatic rewinding apparatus 100 according to Embodiment 1. FIG. 3 is a schematic diagram illustrating a configuration in which the automatic rewinding apparatus 100 and the scrap winder 500 according to Embodiment 1 are separated. FIG. 4 is a schematic diagram illustrating the configuration of the automatic rewinding apparatus 100 according to Embodiment 1. In FIG. 4, only the roll 510 of the scrap winder 500 is shown. The roll 510 of the scrap winder 500 may also be referred to as a winder roll.

[0016] As shown in FIGS. 2 to 4, the automatic rewinding device 100 may be used in combination with a scrap winder 500. When the film FL breaks, the automatic rewinding device 100 can automatically rewind the film FL onto the roll 510 of the scrap winder 500. The automatic rewinding device 100 may sometimes be simply referred to as a rewinding device. The automatic rewinding device 100 includes a roll 110, a roll 120, a roll 130, a roll 140, and a cutter 150.

[0017] The rolls 110 to 140 are, for example, cylindrical. The rolls 110 to 140 each have a central axis. The rolls 110 to 140 each rotate about each central axis as a rotation axis.

[0018] Here, for the sake of convenience in explaining the automatic rewinding device 100, an XYZ orthogonal coordinate system is introduced. The direction in which each central axis of the rolls 110 to 140 extends is taken as the X-axis direction, and the two directions orthogonal to the X-axis direction are taken as the Y-axis direction and the Z-axis direction. For example, the +Z-axis direction is taken as upward and the -Z-axis direction is taken as downward. Also, the X-axis direction, the Y-axis direction, and the Z-axis direction may sometimes be referred to as the first direction, the second direction, and the third direction, respectively. At least one of the -X-axis side, the -Y-axis side, and the -Z-axis side may be referred to as one side, and at least one of the +X-axis side, the +Y-axis side, and the +Z-axis side may be referred to as the other side. Conversely, at least one of the -X-axis side, the -Y-axis side, and the -Z-axis side may be referred to as the other side, and at least one of the +X-axis side, the +Y-axis side, and the +Z-axis side may be referred to as one side. Note that upward and downward are directions for the sake of explanation and do not limit the direction in which the automatic rewinding device 100 is actually arranged.

[0019] The rolls 110 to 140 extend in the X-axis direction. The rolls 110 to 140 each have a central axis extending in the X-axis direction and rotate around the central axis. Note that the rolls 110 to 140 do not necessarily have to rotate around the central axis as long as they can smoothly move the film FL.

[0020] Roll 130 is positioned on the -Y axis side of rolls 110, 120, 140, cutter 150, and 510. Roll 130 is positioned on the +Z axis side of roll 510. Roll 130 may also be positioned on the +Z axis side of roll 120.

[0021] Roll 110 is positioned on the +Y axis side of roll 130. Roll 110 is positioned on the -Y axis side of rolls 120, 140, and 150. Roll 110 may also be positioned on the -Y axis side of roll 510. Roll 110 is positioned to be movable in the Z axis direction. When film FL is passed through the apparatus, roll 110 may be positioned on the +Z axis side of rolls 130 and 140. When film FL is being formed, roll 110 may be positioned on the -Z axis side of rolls 130 and 140. Also, when film FL is being formed, roll 110 may be positioned on the -Z axis side of roll 120. Furthermore, when film FL is being passed through and during forming, roll 110 may be positioned on the +Z axis side of roll 510.

[0022] Roll 120 is positioned on the +Y axis side of rolls 110, 130, and 150. Roll 120 is positioned on the -Y axis side of roll 140. Roll 120 may be movable in at least one of the Y axis and Z axis directions. For example, when moving the scrap winder 500 from the automatic rewinding device 100, roll 120 may be moved away from roll 510 so as not to interfere with the movement. Roll 120 may be positioned on the -Z axis side of rolls 130 and 140. Roll 120 may be positioned on the +Z axis side of roll 510.

[0023] Roll 140 is positioned on the +Y axis side of rolls 110, 120, 130, cutter 150, and 510. Roll 140 is positioned on the +Z axis side of roll 510. Roll 140 may also be positioned on the +Z axis side of roll 120.

[0024] Roll 510 is positioned on the +Y axis side of roll 130. Roll 510 may also be positioned on the +Y axis side of roll 110. Roll 510 is positioned on the -Y axis side of roll 140. Roll 510 may also be positioned on the -Y axis side of roll 120. Roll 510 is positioned on the -Z axis side of rolls 130 and 140.

[0025] The cutter 150 extends in the X-axis direction. The cutter 150 is positioned on the +Y-axis side of the rolls 130 and 110. The cutter 150 is positioned on the -Y-axis side of the rolls 120 and 140. The cutter 150 may also be positioned on the +Y-axis side of the roll 510. The cutter 150 is positioned to be movable in the Z-axis direction. The -Z-axis side of the cutter 150 is a blade. The cutter 150 cuts the film. The cutter 150 may be, for example, a guillotine cutter.

[0026] Next, the configuration when the film FL is passed through the automatic rewinding device 100 will be described. Figure 5 is a schematic diagram illustrating the configuration when the film FL is passed through the automatic rewinding device 100 according to Embodiment 1. As shown in Figure 5, the rolls 110, 120, 130, 140 and cutter 150 are arranged so that the film FL, supplied from the -Y axis side of roll 130 (i.e., from the -Y axis side of roll 110), is discharged to the +Y axis side of roll 140 (i.e., to the +Y axis side of roll 120) after passing through the +Z axis side of roll 130, the -Z axis side of roll 110, the -Z axis side of cutter 150, the +Z axis side of roll 120, and the +Z axis side of roll 140.

[0027] Next, the configuration when the film FL is set in the automatic rewinding device 100 during molding will be described. Figure 6 is a schematic diagram illustrating the configuration when the film FL is set in the automatic rewinding device 100 according to Embodiment 1 during molding. As shown in Figure 6, during molding, the roll 110 descends in the -Z axis direction and is positioned on the -Z axis side of the rolls 130 and 140, pushing the film FL in the -Z axis direction. The roll 110 may generate tension in the film FL by pushing it in the -Z axis direction in this way. The roll 110 brings the film FL closer to the roll 120 by pushing it in the -Z axis direction. For example, the roll 110 may sandwich the film FL between itself and the roll 120. Alternatively, the roll 110 may sandwich the film FL between itself and the roll 510 of the scrap winder 500. In this state, the automatic rewinding device 100 discharges the film FL supplied from the longitudinal stretching device 200 to the transverse stretching device 300. In this way, the film forming apparatus 1 sets the film FL and forms the film FL.

[0028] Next, the configuration when the film FL breaks will be described. Figure 7 is a schematic diagram illustrating the configuration when the film FL breaks in the automatic rewinding device 100 according to Embodiment 1 is detected. As shown in Figure 7, when the film FL breaks on the +Y axis side of the roll 140 (i.e., on the +Y axis side of the roll 120), specifically when the film FL breaks in the transverse stretching device 300, the cutter 150 cuts the film FL between the roll 110 and the roll 120. For example, the cutter 150 falls in the -Z axis direction to cut the film FL. The roll 120 may hold the film FL in place when the cutter 150 cuts the film FL. The cut film FL is wound onto the roll 510 of the scrap winder 500, which is located on the -Z axis side of the roll 110. For example, the cut film FL is wound onto the roll 510 of the scrap winder 500. In other words, because the roll 110 creates tension in the film FL, when the film FL is cut between the roll 110 and the roll 120, the cut film FL will wrap around the roll 510 due to the tension.

[0029] The cut film FL may be wrapped around the roll 510 by tension, or it may be wrapped around the roll 510 of the scrap winder 500 by adhesive tape prepared in advance on the roll 510. In addition, the cut film FL may be charged with static electricity, and it may be wrapped around the roll 510 by that static electricity.

[0030] Next, the temporary winding of the scrap winder 500 will be explained. Figure 8 is a schematic diagram illustrating the configuration of the temporary winding of the scrap winder 500 in the automatic rewinding device 100 according to Embodiment 1. As shown in Figure 8, the roll 510 of the scrap winder 500 winds the film FL cut by the cutter 150 and continues to wind the film FL supplied from the longitudinal stretching device 200. In this case, the roll 110 and the cutter 150 move in the +Z axis direction. The process of winding the film FL supplied from the longitudinal stretching device 200 onto the roll 510 of the scrap winder 500 until the film FL that has been torn in the transverse stretching device 300 is removed from the transverse stretching device 300 and new film FL is supplied to the transverse stretching device 300 is called temporary winding.

[0031] When removing the broken film FL from the transverse stretching device 300 and supplying new film FL to the transverse stretching device 300, the scrap winder 500, including the roll 510 on which the temporarily wound film FL is wound, is removed from the automatic rewinding device 100, as shown in Figure 3. In other words, the automatic rewinding device 100 can be removed from the scrap winder 500, including the roll 510 on which the film FL is wound. Then, as shown in Figure 5, the new film FL is passed through the automatic rewinding device 100.

[0032] Figure 9 is a schematic diagram illustrating a detection unit 160 for detecting breakage of the film FL in the automatic rewinding device 100 according to Embodiment 1. As shown in Figure 9, the automatic rewinding device 100 may further include a detection unit 160 for detecting breakage of the film FL. The detection unit 160 may be installed on the +Y axis side of the roll 140, specifically in the transverse stretching device 300.

[0033] The detection unit 160 may also detect changes in tension occurring in the film FL. For example, the transverse stretching device 300 has clips that hold both ends of the film FL in the X-axis direction in order to stretch the film FL in the X-axis direction. The detection unit 160 can detect the breakage of the film FL by monitoring the tension applied to the clips. For example, if the film FL breaks, the tension decreases, so the detection unit 160 can detect the breakage of the film FL.

[0034] Furthermore, the detection unit 160 may detect changes in the reflected or transmitted light of the light irradiated onto the film FL. For example, the transverse stretching device 300 may have an illumination device that irradiates the film FL with light, and a measuring instrument that detects the reflected light that is reflected by the film FL or the transmitted light that is transmitted through the film FL. The detection unit 160 can detect the breakage of the film FL by monitoring the amount of reflected or transmitted light measured by the measuring instrument.

[0035] Furthermore, the detection unit 160 may also detect an image of the film FL. For example, the transverse stretching device 300 has a camera that photographs the film FL. The detection unit 160 can detect a break in the film FL by monitoring changes in the shape of the film FL in the image.

[0036] Next, as an example of the operation of the automatic rewinding device 100, a method for rewinding the film FL using the automatic rewinding device 100 will be described. Figure 10 is a flowchart illustrating an example of a method for rewinding the film FL using the automatic rewinding device 100 according to Embodiment 1.

[0037] As shown in step S11 of Figure 10 and in Figure 9, the detection unit 160 starts detection. Specifically, the detection unit 160 detects the breakage of the film FL discharged from the automatic rewinding device 100. Note that step S11 may be performed after step S12, or simultaneously with step S12, as long as it is before step S13.

[0038] Next, as shown in step S12 of Figure 10 and in Figure 5, the film FL is passed through the automatic rewinding device 100. Specifically, the film FL supplied from the -Y axis side of roll 130 is passed through the +Z axis side of roll 130, the -Z axis side of roll 110, the -Z axis side of cutter 150, the +Z axis side of roll 120, and the +Z axis side of roll 140, and discharged to the +Y axis side beyond roll 140. In this way, the film FL supplied from the longitudinal stretching device 200 is supplied to the transverse stretching device 300 through the automatic rewinding device 100.

[0039] Next, as shown in step S13 of Figure 10 and in Figure 6, the film FL is set in the automatic rewinding device 100 to start forming the film FL. Specifically, the roll 110 is positioned on the -Z axis side of the rolls 130 and 140, and the roll 110 pushes the film FL in the -Z axis direction, bringing the film FL closer to the roll 120. Tension may also be generated in the film FL by pushing it in the -Z axis direction. In this state, the forming of the film FL is started.

[0040] Next, as shown in step S14 of Figure 10, it is determined whether to terminate the molding of the film FL. If the molding of the film FL is to be terminated (YES in step S14), the molding of the film FL is terminated. On the other hand, if the molding of the film FL is to be continued (NO in step S14), it is determined whether the film FL has broken, as shown in step S15 of Figure 10.

[0041] If the detection unit 160 does not detect a break in the film FL (NO in step S15), steps S14 and S15 are repeated. On the other hand, if the detection unit 160 detects a break in the film FL (YES in step S15), the cutter 150 cuts the film FL between the roll 110 and the roll 120, as shown in step S16 of Figure 10 and in Figure 7. The cut film FL is wound onto the roll 510 of the scrap winder 500. For example, the cut film FL is wound onto the roll 510 of the scrap winder 500 by tension, adhesive tape, static electricity, etc.

[0042] Next, as shown in step S17 of Figure 10 and in Figure 8, the film FL is rewinded onto the roll 510 of the scrap winder 500, which is positioned on the -Z axis side of the roll 110, and temporarily wound onto it.

[0043] Next, as shown in step S18 of Figure 10 and in Figure 3, the automatic rewinding device 100 is removed from the scrap winder 500, which includes the roll 510 on which the film FL is wound. For example, if the film FL that has been torn in the transverse stretching device 300 is to be removed and a new film FL is to be formed, the scrap winder 500 can also be removed from the automatic rewinding device 100.

[0044] Next, as shown in step S19 of Figure 10, it is determined whether to terminate the film formation. If the formation of film FL is to be terminated (YES in step S19), the process is terminated. On the other hand, if the formation of film FL is to be continued (NO in step S19), the film FL is passed through the automatic rewinding device 100 as shown in step S12 of Figure 10. Then, the formation of film FL is continued.

[0045] Next, the effects of this embodiment will be described. In this embodiment, the automatic rewinding device 100 detects a break in the film FL in the transverse stretching device 300, cuts the film FL, and automatically winds the cut film FL onto the roll 510 of the scrap winder 500. Therefore, when the film FL breaks, it can be immediately rewinded onto the roll 510 of the scrap winder 500, and the amount of film FL remaining in the transverse stretching device 300 can be reduced.

[0046] Furthermore, the automatic rewinding device 100 can incorporate a scrap winder 500, and can also remove the scrap winder 500. Therefore, when the film FL is cut by the cutter 150 upon breakage, it can be immediately wound onto the scrap winder 500, and the temporarily wound scrap winder 500 can be removed.

[0047] The detection unit 160 can use detection methods tailored to the characteristics of the film FL, such as changes in tension generated in the film FL, changes in reflected or transmitted light from light irradiated onto the film FL, and images of the film FL, enabling high-precision detection of film FL breakage.

[0048] This disclosure is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention. For example, in the above description, the +Z axis direction is defined as upward and the -Z axis direction as downward, but the configuration may be reversed. For example, rolls 110, 120, 130, and 140 may be arranged so that the film FL supplied from the -Y axis side of roll 130 is discharged to the +Y axis side of roll 140 by passing over the upper side of roll 130, the lower side of roll 110, the upper side of roll 120, and the upper side of roll 140, or they may be arranged so that the film is discharged to the +Y axis side of roll 140 by passing over the lower side of roll 130, the upper side of roll 110, the lower side of roll 120, and the lower side of roll 140. In this case, roll 110 may be positioned above rolls 130 and 140, and tension may be generated in the film FL by pushing it upward. Furthermore, the cutter 150 may move upward to cut the film FL, or it may move downward to cut the film FL. [Explanation of Symbols]

[0049] 1. Film forming apparatus 100 Automatic winding device 110 rolls 120 rolls 130 rolls 140 rolls 150 Cutter 160 detection unit 200 Longitudinal stretching device 300 Lateral stretching device 401 Extruder 402 Cast Roll 403 Pull-back machine 500 Scrap Winder 510 rolls FL film

Claims

1. A first roll extending in the first direction, A cutter extending in the first direction for cutting the film, A second roll extending in the first direction, Equipped with, The first roll is positioned on one side of the cutter in a second direction perpendicular to the first direction, The second roll is positioned on the other side in the second direction from the cutter. The first roll, the cutter, and the second roll are arranged to discharge the film supplied from one side of the first roll in the second direction, through one side of the first roll in a third direction perpendicular to the first and second directions, one side of the cutter in the third direction, and the other side of the second roll in the third direction, to the other side of the second roll in the second direction. The first roll pushes the film towards the second roll by pushing it to one side in the third direction. If the film breaks on the other side in the second direction than the second roll, The cutter cuts the film between the first roll and the second roll. The cut film is wound onto a winder roll of a scrap winder located on one side of the first roll in the third direction. Rewinding device.

2. The system further includes a detection unit for detecting the breakage of the aforementioned film, The detection unit detects the breakage of the film from at least one of the following: a change in tension occurring in the film, a change in reflected or transmitted light from light irradiated onto the film, and an image of the film. The rewinding device according to claim 1.

3. The film can be removed from the scrap winder, including the winder roll on which the film is wound. The rewinding device according to claim 1.

4. A rewinding device according to any one of claims 1 to 3, The first stretching device located on one side in the second direction of the rewinding device, A second stretching device located on the other side in the second direction of the rewinding device, Equipped with, The film supplied from the first stretching device is supplied to the second stretching device via the rewinding device. Film forming machine.

5. A first roll extending in the first direction, A cutter extending in the first direction for cutting the film, A second roll extending in the first direction, Equipped with, The first roll is positioned on one side of the cutter in a second direction perpendicular to the first direction, The second roll is a rewinding method using a rewinding device positioned on the other side in the second direction from the cutter, The steps include detecting the breakage of the film discharged from the rewinding device using a detection unit, The steps include: discharging the film supplied from one side of the first roll in the second direction, through one side of the first roll in the third direction perpendicular to the first and second directions, one side of the cutter in the third direction, and the other side of the second roll in the third direction, to the other side of the second roll in the second direction; The first roll pushes the film towards the second roll by pushing it to one side in the third direction, If the film breaks on the other side in the second direction relative to the second roll, the cutter is instructed to cut the film between the first roll and the second roll. The steps include: rewinding the film onto the winder roll of a scrap winder located on one side of the first roll in the third direction; Equipped with, In the cutting step, the cut film is wound onto the winder roll. How to rewind.

6. The method further comprises the step of removing the rewinding device from the scrap winder, which includes the winder roll on which the film is wound. The rewinding method described in claim 5.

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