JP2024011669A - Film splicing control method, film-containing product manufacturing method, and film splicing control system - Google Patents

Abstract

To properly utilize film on rolls used in the manufacture of products and the like.SOLUTION: A film splicing control method is an operation method of a splicing control system of a film being continuously used after fed out of a roll with the long film wound on a winding core and spliced with the film fed out of another roll, including: a failure detection step (S02) of detecting, before the splicing with the film fed out of the other roll, a winding core failure, being a failure the more likely to occur on the film the closer to the winding core; and a position determination step(S03) of determining the position of the film on the roll, which is spliced with the film fed out of the other roll according to the detected winding core failure.SELECTED DRAWING: Figure 4

Description

The present invention relates to a film splicing control method and a film splicing control system for controlling the splicing of a film that is used after being unwound from a roll, and a method for manufacturing a product containing a film, including the film splicing control method.

Conventionally, when manufacturing a product using a film such as an optical resin film, the film is unwound from a roll in which a long film is wound around a core. In addition, by joining the film of one roll that is fed out to the film of another roll, it is possible to continuously use the film in production between different rolls (for example, see Patent Document 1).

JP2020-201458A

Core defects, which are defects that appear more strongly closer to the core, occur in the film in the roll due to various causes. The causes of core defects are excessive pressure due to tight winding of the core, variations in pressure (kinks, wrinkles), irregularities on the tape or other materials used to fix the film to the core, and the roll storage environment such as temperature and humidity. , storage time, etc. A film with core defects is unsuitable for use in manufacturing products.

On the other hand, the roll of film is used up to produce the product, and the quality of the product or intermediate is determined in a subsequent process. However, products or intermediates manufactured using films with defects are discarded and are wasted.

Alternatively, when the remaining film on the roll reaches a preset uniform length during manufacturing, it is also possible to not use any subsequent film in manufacturing. However, the portion of the film of a roll where core defects occur may vary from roll to roll. Therefore, in the above method, some films may be discarded even though they can be used for manufacturing products, or some films may be used for manufacturing products even though they have defects.

The present invention has been made in view of the above, and provides a film splicing control method that can appropriately utilize roll film used in the manufacture of products, a method for manufacturing an article containing the film, and a film paper splicing method. The purpose is to provide a relay control system.

In order to achieve the above object, the film splicing control method according to the present invention uses a long film that is unwound from a roll wound around a core, and is spliced with a film that is unwound from another roll. A film splicing control method is an operation method of a film splicing control system that controls the splicing of a film that is continuously used in a film roll. A defect detection step detects winding core defects, which are defects that occur in the winding core and appear more strongly the closer to the winding core. a positioning step of determining the position of the film on the roll.

In the film splicing control method according to the present invention, a winding core defect is detected, and the position of the film on the roll to be spliced with a film fed out from another roll is determined according to the detected winding core defect. be done. Therefore, according to the film splicing control method according to the present invention, it is possible to use the appropriate portion of the film in each roll for each roll used for manufacturing products, etc., and the film can be appropriately utilized.

In the defect detection step, an image of the film unrolled from another roll and the film before being spliced may be acquired, and a core defect of the film may be detected from the image. According to this configuration, core defects in the film can be detected appropriately and reliably, and as a result, the film can be appropriately and reliably utilized.

The film whose winding core defect is to be detected is used by being laminated with a film of another system, and in the position determination step, when it is laminated with the film of another system, the joint of the film whose winding core defect is to be detected is , the position may be determined such that the distance between it and the seam of the film of another system is equal to or longer than a preset length. According to this configuration, in a product in which a plurality of films are bonded together, it is possible to reduce the number of parts where problems occur due to the parts where the films are joined together.

A method for manufacturing a product containing a film according to the present invention includes the above-described film splicing control method.

By the way, the present invention can be described not only as an invention of a film splicing control method as described above, but also as an invention of a film splicing control system as described below. These inventions are essentially the same invention, only in different categories, and have similar functions and effects.

That is, the film splicing control system according to the present invention is used by unwinding a long film from a roll wound around a core, and continuously used by splicing with a film unwound from another roll. This is a film splicing control system that controls the splicing of a film, and the film core defect is a defect that occurs in the film before it is spliced with a film that is unwound from another roll, and that is more pronounced the closer it is to the core. and a position determining means for determining the position of the film on the roll to be spliced with the film fed out from another roll, depending on the core defect detected by the defect detection means. .

According to the present invention, it is possible to appropriately utilize a film on a roll used for manufacturing a product or the like.

1 is a diagram showing the configuration of a film splicing control system and a manufacturing apparatus according to an embodiment of the present invention. It is a figure which shows typically the winding core defect which occurs in a film. It is a figure which shows the example of the structure which acquires the image for detecting a winding core defect. 1 is a flowchart illustrating a film splicing control method, which is a process executed by a film splicing control system according to an embodiment of the present invention, and a method for manufacturing an object containing a film, which includes the film splicing control method.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a film splicing control method, a method for manufacturing a product including a film, and a film splicing control system according to the present invention will be described in detail with reference to the drawings. In addition, in the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description will be omitted.

FIG. 1 shows a film splicing control system 10 according to this embodiment. The splicing control system 10 is a system (apparatus) that controls splicing of a film that is used after being unwound from a roll. Further, FIG. 1 schematically shows a manufacturing apparatus 100 that performs manufacturing using a film as a material.

The manufacturing apparatus 100 manufactures products including films. In this embodiment, the manufactured product is a laminated film in which a plurality of films are bonded and laminated. For example, the laminated film is a laminated optical film in which an optical resin film that is a protective film or an optically functional film is bonded to both sides of an optical resin film that is a polarizer. Such a laminated film is used, for example, in manufacturing a polarizing plate. However, the product to be manufactured only needs to contain a film, and does not need to be a laminated film. Further, the film may be a film other than an optical resin film. Further, the product manufactured by the manufacturing apparatus 100 may be a final product or an intermediate used in manufacturing the final product.

As shown in FIG. 1, the film 200 is long and has a roll 210 wound around a core. The film 200 is unwound from the roll 210 and used for manufacturing. The film 200 is, for example, an optical resin film that is the above-mentioned protective film or optically functional film. A plurality of films 200 (rolls 210) of the same type are prepared, and paper splicing is performed to join them together. Even if the film 200 of one roll 210 that can be used for production runs out, production using the film 200 can be continued by splicing it onto the film 200 of another backup roll 210.

Further, as shown in FIG. 1, a film 300 without paper splicing may be used. The film 300 is unwound from the roll 310 and used for manufacturing. The film 300 is, for example, an optical resin film that is the polarizer described above. However, this film 300 may also be subjected to paper splicing in the same manner as the film 200 described above. Further, the film 300 may be longer than the film 200. That is, the film 300 may be a long roll film, and the film 200 may be a short roll film.

As shown in FIG. 1, in this embodiment, a laminated film 400 is manufactured by laminating films 200 on both surfaces of a film 300 in a manufacturing apparatus 100. The film 200 that is paper-spliced in this manner is bonded to a film 200 of another system. In this embodiment, there are two types of film 200, a type of film 200 that is bonded to the film 300 from the left side in FIG. 1, and a type of film 200 that is bonded to the film 300 from the right side. In the above example, the bonding is performed indirectly via the film 300, but the films 200 may be bonded directly. The laminated film 400 is wound around a core to form a roll 410. The rolls 210, 310 of the films 200, 300 used for manufacturing are positioned in advance and placed in the manufacturing apparatus 100.

The manufacturing apparatus 100 includes a transport roll 110 that transports the films 200, 300. The conveyance roll 110 is provided and positioned in advance. The transport path of the films 200, 300 by the transport roll 110 is such that the above-described paper splicing of the film 200 and bonding of the films 200, 300 are possible. In FIG. 1, the conveyance direction of the conveyance path of the films 200, 300 is shown by a white arrow.

The manufacturing apparatus 100 includes two nip rolls 120 for bonding the films 200 and 300 together. The transported films 200, 300 pass through the two nip rolls 120, so that the films 200, 300 described above are bonded together, and a laminated film 400 is manufactured.

The manufacturing apparatus 100 includes a paper splicing device 130. The paper splicing device 130 is provided at a position between the roll 210 of the film 200 and the nip roll 120 on the transport path of the film 200. The paper splicing device 130 cuts (cuts) one film 200 to be spliced, and affixes another film 200 to the cut film 200 to separate the paper of the film 200. Perform the splicing. The paper splicing is performed by adhesively fixing the rear end of the old film 200 (cut film 200) and the leading end of the new film 200 in an overlapping state. Alternatively, paper splicing is performed by fixing the rear end of the old film 200 and the leading end of the new film 200 with tape or the like without overlapping them. The paper splicing device 130 performs paper splicing under the control of the paper splicing control system 10, as will be described later.

As the manufacturing apparatus 100, any conventional manufacturing apparatus that performs the above steps may be used. The rolls 210, 310 of the films 200, 300 used for manufacturing may also be conventional.

For example, the winding length, which is the length in the longitudinal direction of the film 200 bonded together like in this embodiment, may be 400 m or more, 800 m or more, or 1200 m or more. Alternatively, unlike this embodiment, if the films are not bonded together, the winding length of the film 200 may be 5000 m or more or 10000 m or more. The width of the original fabric, which is the width of the film 200, may be 2000 mm or less, 1200 to 2000 m, or 1500 to 2000 m. The thickness of the film 200 may be 200 μm or less, 100 μm or less, 50 μm or less, or 30 μm or less. The film winding diameter of the roll 210 may be φ300 mm or more, φ400 mm or more, or φ500 mm or more.

In the film 200 that is unwound from the roll 210, a core defect occurs, which is a defect that appears more strongly as the film gets closer to the core, due to various causes. The causes of core defects are excessive pressure due to tight winding of the core, variations in pressure (kinks, wrinkles), irregularities on the tape or other materials used to fix the film to the core, and the roll storage environment such as temperature and humidity. , storage time, etc. The film 200 with core defects is unsuitable for use in manufacturing products. The core defect becomes more noticeable as the film 200 becomes longer, wider, and thinner.

FIG. 2 schematically shows an example of a winding core defect D that occurs in the film 200. The winding core defect D shown in FIG. 2 is an unevenness that occurs on the film 200 due to the unevenness transfer of the tape 220 that fixes the film 200 to the winding core of the roll 210. This winding core defect D appears approximately periodically in the direction in which the film 200 is unwound.

Since the unevenness transfer of the tape 220 is more strongly performed in the portion closer to the winding core, the above-mentioned winding core defect D is more strongly expressed as the tape 220 is closer to the winding core. In this case, the closer the film 200 is to the winding core, the greater the difference in height of the unevenness that occurs on the film 200. In FIG. 2, the darker the black color, the stronger the degree of occurrence of the winding core defect D. A film 200 in which the strength of the winding core defect D exceeds a certain level is inappropriate for use in manufacturing. For example, as shown in FIG. 2, a film 200 in the range indicated by OK in which the strength of the winding core defect D is not so strong can be used for manufacturing, but a film 200 in the range indicated by NG in which the strength of the winding core defect D is strong can be used for manufacturing. cannot be used for manufacturing. Note that the winding core defect may be any defect that occurs in the film 200 and appears more strongly as it approaches the winding core, and may be a defect other than those described above. For example, the core defect may be distortion, uneven shape, or uneven color of the film 200.

The splicing control system 10 controls the splicing of the film 200 to appropriately utilize the film on the roll used for manufacturing. The film 200 after the paper splicing position is not used for manufacturing and is usually discarded. The control by the paper splicing control system 10 is intended to reduce the number of films 200 that are discarded even though they can be used for production, and the number of films 200 that are used for production even though they are inappropriate for use in production. be.

Specifically, the paper splicing control system 10 is a PC (personal computer) that is a computer including hardware such as a CPU (Central Processing Unit) and a memory, or a server device. Each function of the paper splicing control system 10, which will be described later, is achieved by operating these components using a program or the like. Note that the paper splicing control system 10 may be realized by one computer, or may be realized by a computer system configured by a plurality of computers connected to each other via a network.

Subsequently, the functions of the paper splicing control system 10 according to this embodiment will be explained. As shown in FIG. 1, the paper splicing control system 10 includes a defect detection section 11 and a position determination section 12.

The defect detection unit 11 is a defect detection means that detects a winding core defect, which is a defect that occurs in the film 200 and appears more strongly the closer to the winding core, before the film 200 is spliced with the film 200 fed out from another roll 210. . That is, the defect detection section 11 inspects the film 200 for defects. The defect detection unit 11 may acquire an image of the film 200 that is unrolled from another roll 210 and the film 200 before being spliced, and detect a core defect of the film from the image. For example, the defect detection unit 11 detects core defects occurring in the film 200 as follows.

In order for the defect detection unit 11 to detect core defects, the manufacturing apparatus 100 is provided with a device that acquires information used for the detection. The devices are, for example, a light source 21 and a camera 22. Note that the paper splicing control system may include the computer forming the paper splicing control system 10 and the devices 21 and 22 described above.

The light source 21 and the camera 22 are provided for each roll 210 of the film 200 whose core defects are to be detected. In the example shown in FIG. 1, a light source 21 and a camera 22 are provided for each film 200 unwound from four rolls 210. The light source 21 and the camera 22 are positioned and provided at a position in front of the paper splicing device 130 in the transport direction of the film 200 (that is, at a position upstream of the paper splicing process). Specifically, the position where the light source 21 and the camera 22 are provided is near the position where the film 200 is fed out from the roll 210, for example, 2000 mm or less or 1000 mm or less from the position.

The light source 21 is a device that irradiates light onto the surface of the film 200 whose core defects are to be detected. The light emitted by the light source 21 is for enabling the camera 22 to obtain an image suitable for detecting core defects. The camera 22 is an imaging device that takes an image of the film 200. The image obtained by the camera 22 is used by the defect detection section 11 to detect a core defect in the film 200. That is, in this embodiment, defects are inspected based on the appearance of the film 200.

The camera 22 is provided at a position where it can image the surface of the film 200 on the side where the light source 21 is provided. That is, both the light source 21 and the camera 22 are provided on the same side of both sides of the film 200. The camera 22 is provided to take an image of a location on the film 200 where the light from the light source 21 is (scattering) reflected. The camera 22 takes an image so as to focus on the edge of the portion of the film 200 on which the light from the light source 21 is reflected (irradiated) (light source reflection image).

The camera 22 continuously captures images of the film 200. For example, images are captured such that all parts of the film 200 being transported appear in any of the images obtained. The camera 22 is connected to the paper splicing control system 10 so as to be able to send information to the paper splicing control system 10 . The camera 22 transmits the image obtained by capturing to the paper splicing control system 10 every time it captures an image. As the light source 21 and camera 22, conventional ones may be used.

The defect detection unit 11 receives and acquires an image transmitted from the camera 22. Upon receiving an image from the camera 22, the defect detection unit 11 detects a core defect of the film 200 from the image. The defect detection unit 11 extracts the characteristics of the winding core defect from the image by image analysis. For example, the defect detection unit 11 detects a value indicating the strength of the winding core defect from the image on the film 200 as a feature of the winding core defect (for example, a value indicating that the larger the value, the stronger the winding core defect is expressed). Extract. Feature extraction of winding core defects from images obtained by image analysis may be performed using conventional techniques such as machine learning (AI (artificial intelligence)). In this case, an image of a film with a core defect and an image of a film without a core defect may be used as training data.

The defect detection unit 11 detects a core defect occurring in the film 200 based on the characteristics of the core defect extracted from the image. For example, the defect detection unit 11 detects a winding core defect by comparing a value related to the characteristics of the winding core defect described above with a preset threshold value. The defect detection unit 11 determines that a core defect has occurred in the film 200 shown in the image when the value related to the characteristic of the core defect is equal to or higher than the threshold value, and the defect detection unit 11 determines that the value related to the characteristic of the core defect is greater than or equal to the threshold value. If it is less than the threshold value, it is determined that there is no core defect in the film 200 shown in the image.

The core defects determined here may be at a level unsuitable for manufacturing a laminated film. Therefore, even if a winding core defect occurs, it may be a minor defect that does not cause any actual damage to the production of the laminated film (for example, unevenness that disappears when the laminated film is attached to glass to produce a polarizing plate). For example, there may be no core defect.

Furthermore, the defect detection unit 11 may detect winding core defects not from one image but from a plurality of time-series images. For example, the defect detection unit 11 stores a period according to the roll of the film 200 in advance, and if a defect is detected consecutively a preset number of times in the period, it is determined that a core defect has occurred in the film 200. You can judge.

The defect detection unit 11 may detect core defects after the remaining amount of the film 200 on the roll 210 reaches a preset length (for example, 200 m). This is because it is thought that winding core defects are unlikely to occur in portions longer than the above-mentioned length. In this case, the light source 21 and the camera 22 only have to operate at the timing when the defect detection section 11 detects the winding core defect (the same applies below). Note that a sensor (for example, an encoder) is installed on each roll 210, and the paper splicing control system 10 determines which part of the film 200 of each roll 210 (for example, the remaining length of the roll 210) Detection may be performed, and whether or not paper splicing (specifically, cutting of the film 200 for paper splicing) is to be performed may be determined and used for each function.

The defect detection unit 11 only needs to detect core defects on the film 200 that is used to manufacture the laminated film 400, that is, the film 200 that is being transported to be bonded to the film 300. There is no need to detect core defects for the film 200. When the defect detection unit 11 detects a core defect in the film 200, it notifies the position determination unit 12 of the detection. The defect detection unit 11 also provides information indicating the film 200 in which the core defect has been detected (for example, information indicating whether the film 200 is on the left side or the film 200 on the right side in FIG. 1) and the core defect has been detected. The information indicating the position on the film 200 thus determined may also be outputted to the position determining section 12 and used for control in the position determining section 12.

The light source 21 and camera 22 for detecting winding core defects may have a configuration other than the above. For example, as shown in FIG. 3A, the light source 21 may be one that irradiates the film 200 with light in a lattice pattern provided with a lattice mask. An image that is a reflected image of the light of the lattice pattern may be obtained by taking an image with the camera 22, and a distortion of the reflected image may be detected to detect a winding core defect.

In addition, when the film 200 is made of a light-transmitting member, the light source 21 is arranged so as to irradiate light obliquely to one surface of the film 200, as shown in FIG. 3(b). However, the camera 22 may be placed on the opposite surface of the film 200 to capture an image of the light from the light source 21 that has passed through the film 200. In this case, for example, the light source 21 and the camera 22 may be arranged so that the light irradiation direction and the imaging direction are 45°±15° with respect to the film 200. Further, in this case, half of the light from the light source 21 may be blocked (slit).

The defect detection unit 11 may detect core defects in the film 200 using methods other than those described above. Further, the defect detection unit 11 may detect core defects in the film 200 using images other than the image of the film 200. The method for detecting a winding core defect and the information used for detecting a winding core defect may be based on the type of winding core defect to be detected.

The position determining unit 12 is a position determining unit that determines the position of the film 200 on the roll 210 to be spliced with the film 200 fed out from another roll 210 according to the core defect detected by the defect detection unit 11. be. The position determining unit 12 determines that when the film 200 of another system is laminated, the distance between the seam of the film 200 whose winding core defect is to be detected and the seam of the film 200 of the other system is set in advance. The position may be determined so that it is equal to or longer than the length. The amount of film 200 used in a roll 210 is determined by the position of the paper splice with the film 200 of another roll 210. Therefore, the position determining unit 12 determines the usage amount (unwinding amount) of the film 200 on the roll 210. For example, the position determining unit 12 determines the splicing position of the film 200 on the roll 210 as follows.

The position determination unit 12 receives a notification from the defect detection unit 11 that a core defect in the film 200 has been detected. Upon receiving the notification, the position determining unit 12 determines the position immediately before the position of the detected core defect in the transport direction (longitudinal direction) of the film 200 as the paper splicing position. In the example shown in FIG. 2, a position P in the transport direction (longitudinal direction) of the film 200 immediately before the winding core defect D that is initially determined to be NG is determined as the paper splicing position.

After determining the splicing position of the film 200, the position determining unit 12 instructs the splicing device 130 to cut the film 200 at the determined splicing position and splice it onto the film 200 of another roll 210. Control. Note that for this control, the paper splicing control system 10 and the paper splicing device 130 are connected so that information can be transmitted and received. The paper splicing device 130 performs paper splicing under the control. The operation of the paper splicing device 130 according to the control may be performed in the same manner as a conventional paper splicing device.

When the paper splicing position is determined independently for each film 200 as described above, the paper splicing position of the two systems of films 200 to be pasted together (in the example of FIG. 1, the two films 200 pasted to the film 300 from the left and right) However, there is a possibility that they may be close to each other in the laminated film 400. Usually, the thickness of the film 200 at the splicing position of the film 200 is convex in the thickness direction of the film 200. This is because the two films 200 are connected by tape or the like, so the film 200 becomes thicker by the thickness of the tape or the like. Therefore, when the paper splicing position of the film 200 passes through the nip roll 120 and is bonded to the film 300, there is a possibility that bubbles or wrinkles may occur on the bonded inner surface due to the part of the paper splicing position. This is especially noticeable when the difference in unevenness at the paper splicing position of the film 200 is large.

Further, defects further progress and spread starting from air bubbles or wrinkles, and defective parts that cannot be widely used in the laminated film 400 are formed. When the splicing positions of the two films 200 are close to each other, the unevenness of the two films 200 influences each other, and a defective part is formed over a wider range than that caused by the splicing positions of the two films 200. Therefore, the position determining unit 12 may set the distance between the seams, which are the paper splicing positions, of the two films 200 to be a distance that is not influenced by each other.

The position determining unit 12 stores the determined splicing position for each system of film 200. When determining the paper splicing position upon receiving the notification from the defect detection unit 11, the position determining unit 12 determines the paper splicing position in the laminated film 400 and the stored separate system when determining the paper splicing position as described above. It is determined whether the distance between the film 200 and the splicing position is equal to or longer than a preset length. The position determining unit 12 stores in advance the correspondence between the splicing position of the film 200 and the position of the laminated film 400 at which the splicing position is located, and makes the above determination based on the memory. The preset length L may satisfy 0 mm<L, for example, in order to avoid overlapping of the paper splicing positions where the unevenness at the paper splicing position becomes the largest. Alternatively, the length L may satisfy 50 mm≦L or 100 mm≦L so that the paper splicing positions are spaced so that they are not affected by each other. Furthermore, the length L may satisfy 250 mm≦L or 500 mm≦L so that the paper splicing position is separated by more than half the circumference of the roll 210 (for example, a 6-inch winding core has a circumference of 478 mm). .

If the position determination unit 12 determines that the above-mentioned interval is equal to or greater than a preset length, the position determination unit 12 determines the paper splicing position as described above. If the position determination unit 12 determines that the above-mentioned interval is not greater than the preset length, the position determination unit 12 determines the paper splicing position to be shifted backward in the conveyance direction so that the above-mentioned interval becomes the preset length. do. In this case, there is a possibility that a portion of the film 200 that is detected to have a core defect by the defect detection unit 11 is used for manufacturing the laminated film 400. Therefore, the criteria for detecting core defects by the defect detection unit 11 may be made stricter (for example, by lowering the threshold value) to prevent inappropriate portions of the film 200 from being used in the production of the laminated film 400. After determining the paper splicing position in this manner, the position determining unit 12 may control the paper splicing device 130 in the same manner as described above. The above are the functions of the film splicing control system 10 according to the present embodiment.

Subsequently, using the flowchart of FIG. 4, a film splicing control method, which is a process executed by the film splicing control system 10 according to the present embodiment (an operation method performed by the film splicing control system 10), Also, a method for manufacturing a product including a film including the paper splicing control method will be described.

In this process, the laminated film 400 is manufactured from the films 200 and 300 by the manufacturing apparatus 100 (S01). In addition, the manufacturing process (S01) of the laminated film 400 is continuously performed while subsequent processing is performed.

Subsequently, the defect detection unit 11 of the paper splicing control system 10 detects a core defect in the film 200 (S02, defect detection step). Detection of core defects in the film 200 is performed, for example, from an image of the film 200 irradiated with light from the light source 21, which is obtained by imaging with the camera 22. Subsequently, the position determining unit 12 determines the splicing position of the film on the roll, where the film is spliced with the film 200 fed out from another roll 210, according to the core defect detected by the defect detecting unit 11. (S03, position determination step).

Subsequently, the position determining unit 12 controls the splicing device 130 to splice the film 200 at the determined splicing position (S04). According to this control, the splicing of the film 200 is performed by the splicing device 130. Note that the processes S02 to S04 are repeated for each line of film 200 used for manufacturing the laminated film 400. The above are the processes performed by the film splicing control system 10 and the method for manufacturing an object including the film according to the present embodiment.

In this embodiment, a winding core defect is detected, and the position of the film 200 on the roll 210 where it is spliced with the film 200 fed out from another roll 210 is determined according to the detected winding core defect. Therefore, according to this embodiment, the film 200 of the roll 210 used for manufacturing can be used up to an appropriate portion for each roll 210, and the film 200 can be appropriately utilized. Specifically, compared to the case where paper splicing is performed when the remaining film on a roll reaches a preset uniform length, the paper splicing control system 10 is discarded even though it can be used for manufacturing. Less film 200, or less film 200 used in manufacturing even though it is unsuitable for use in manufacturing.

Alternatively, as in the present embodiment, an image of the film 200 that has not been spliced with the film 200 that is fed out from another roll 210 may be acquired, and core defects in the film 200 may be detected from the image. . According to this configuration, core defects in the film 200 can be detected appropriately and reliably, and as a result, the film 200 can be appropriately and reliably utilized. However, the detection of winding core defects does not necessarily need to be performed from images, and may be performed by any method.

Further, as in the present embodiment, the film 200 whose winding core defects are to be detected is used by being laminated with a film 200 of another system, and when laminated with the film 200 of another system, the film 200 of the other system The paper splicing position may be determined so that the distance between the joints with 200 is equal to or longer than a preset length. According to this configuration, in a product in which a plurality of films 200 are pasted together, it is possible to reduce the number of parts where problems occur due to the parts where the films 200 described above are joined together. However, it is not necessary to bond a plurality of films 200 of different systems together.

Further, as in the present embodiment, the paper splicing control of the film 200 may be used in a method of manufacturing a product including the film 200. In addition, in this embodiment, although the product manufactured was the laminated film 400, it may be other than the laminated film 400. In addition, in this embodiment, the film 200 to be controlled by paper splicing is used for manufacturing. However, the film does not necessarily need to be used for manufacturing as long as it is used after being unrolled from a roll and is spliced with a film unrolled from another roll to be used continuously.

A film splicing control method, a method for manufacturing a product including a film, and a film splicing control system of the present disclosure have the following configurations.
[1] Film splicing that controls the splicing of a long film that is unwound from a roll wound around a core and spliced with a film that is unwound from another roll to be used continuously. A film splicing control method which is an operating method of a control system, the method comprising:
A defect detection step of detecting a winding core defect, which is a defect that occurs in the film and becomes stronger as it is closer to the winding core, before being spliced with a film unwound from another roll;
a position determining step of determining the position of the film on the roll to be spliced with the film fed out from another roll, depending on the core defect detected in the defect detecting step;
A method for controlling paper splicing of a film including.
[2] In the defect detection step, an image of the film unrolled from another roll and the film before being spliced is acquired, and a core defect of the film is detected from the image. Paper joint control method.
[3] The film whose winding core defects are to be detected is used by laminating it with another type of film,
In the position determining step, when the film is laminated with another system of film, the distance between the joint of the film whose core defect is to be detected and the joint of the film of another system is equal to or longer than a preset length. The film splicing control method according to [1] or [2], wherein the position is determined so that the following is achieved.
[4] A method for manufacturing an article containing a film, including the method for controlling splicing of a film according to any one of [1] to [3].
[5] Film splicing that controls the splicing of a long film that is unwound from a roll wound around a core and spliced with a film that is unwound from another roll to be used continuously. A control system,
A defect detection means for detecting a winding core defect, which is a defect that occurs in the film and becomes stronger the closer it is to the winding core, before it is spliced with a film unwound from another roll;
position determining means for determining the position of a film on a roll to be spliced with a film fed out from another roll according to a core defect detected by the defect detecting means;
A film splicing control system comprising:

DESCRIPTION OF SYMBOLS 10... Film splicing control system, 11... Defect detection unit, 12... Position determining unit, 21... Light source, 22... Camera, 100... Manufacturing device, 110... Conveyance roll, 120... Nip roll, 130... Paper splicing device, 200 , 300... Film, 400... Laminated film, 210, 310, 410... Roll, 220... Tape.

Claims (5)

A film splicing control system that controls the splicing of a long film that is unwound from a roll wound around a core, and is spliced with a film unwound from another roll for continuous use. A film splicing control method which is an operation method,
A defect detection step of detecting a winding core defect, which is a defect that occurs in the film and becomes stronger as it is closer to the winding core, before being spliced with a film unwound from another roll;
a position determining step of determining the position of the film on the roll to be spliced with the film fed out from another roll, depending on the core defect detected in the defect detecting step;
A method for controlling paper splicing of a film including. 2. The film splicing control according to claim 1, wherein in the defect detection step, an image of the film fed out from another roll and the film before being spliced is acquired, and a core defect of the film is detected from the image. Method. The film whose winding core defects are to be detected is used by laminating it with another type of film.
In the position determining step, when the film is laminated with another system of film, the distance between the joint of the film whose core defect is to be detected and the joint of the film of another system is equal to or longer than a preset length. 3. The film splicing control method according to claim 1 or 2, wherein the position is determined so that . A method for manufacturing an article containing a film, comprising the method for controlling paper splicing of a film according to claim 1 or 2. A film splicing control system that controls the splicing of a long film that is unwound from a roll wound around a core and spliced with a film unwound from another roll for continuous use. There it is,
A defect detection means for detecting a winding core defect, which is a defect that occurs in the film and becomes stronger the closer it is to the winding core, before being spliced with a film unwound from another roll;
position determining means for determining the position of a film on a roll to be spliced with a film fed out from another roll according to a core defect detected by the defect detecting means;
A film splicing control system comprising:

Images