JP2009056583A - Film piece manufacturing method, cutting blade for cutting film and film piece manufacturing apparatus - Google Patents

Film piece manufacturing method, cutting blade for cutting film and film piece manufacturing apparatus Download PDF

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JP2009056583A
JP2009056583A JP2008198190A JP2008198190A JP2009056583A JP 2009056583 A JP2009056583 A JP 2009056583A JP 2008198190 A JP2008198190 A JP 2008198190A JP 2008198190 A JP2008198190 A JP 2008198190A JP 2009056583 A JP2009056583 A JP 2009056583A
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film
punching
film piece
cutting
piece
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Hiromichi Ohashi
宏通 大橋
Hirotaka Nishimura
宏隆 西邑
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Nitto Denko Corp
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Nitto Denko Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
    • B26F1/22—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material to form non-rectilinear cuts, e.g. for tabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B26F2001/407—Cutting-out; Stamping-out using a press, e.g. of the ram type stepwise sequential punching processes

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film piece manufacturing method which, in punching a film piece as a product from a strip-like film, can improve the area yield of the strip-like film as the punching object without lowering the yield of the punched film piece. <P>SOLUTION: In the manufacturing method, a strip-like film is punched at a prescribed feeding pitch to obtain a plurality of film pieces from the strip-like film. The manufacturing method is characterized in that a cut line formed by one punching is permitted to be a part of the outline of the film piece and, when the cut lines are combined by repeating such punching two times or more at the prescribed feeding pitch, the entire outline of the film piece is formed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、長尺フィルムを打ち抜くことによってフィルム片を製造するフィルム片の製造方法と、該打ち抜きに使用するフィルム切断用の切断刃、及び該切断刃を備えたフィルム片の製造装置に関し、特に、該フィルム片が偏光フィルムや光学補償フィルム等の光学フィルムである場合に好適なフィルム片の製造方法に関する。   The present invention relates to a film piece manufacturing method for manufacturing a film piece by punching a long film, a cutting blade for film cutting used for the punching, and a film piece manufacturing apparatus provided with the cutting blade. The present invention relates to a method for producing a film piece suitable for the case where the film piece is an optical film such as a polarizing film or an optical compensation film.

周知の如く、液晶表示装置等の画像表示装置には、偏光フィルムや位相差フィルムといった種々の光学フィルムが使用されており、これらの光学フィルムを備えることによって該画像表示装置は所望の画像表示特性を発揮している。   As is well known, various optical films such as a polarizing film and a retardation film are used in an image display device such as a liquid crystal display device. By providing these optical films, the image display device has desired image display characteristics. Is demonstrating.

かかる光学フィルムは、一般に、所定の樹脂材料からなる長尺フィルムを作製した後、１又は２以上の樹脂層を積層したり、必要に応じて該フィルムを長手方向又は幅方向に延伸することによって所望の特性を付与した後、打ち抜き装置を用いて所定の製品形状を有するフィルム片として打ち抜かれることにより製造される（下記特許文献１等）。   In general, such an optical film is obtained by preparing a long film made of a predetermined resin material, laminating one or two or more resin layers, or stretching the film in the longitudinal direction or the width direction as necessary. After imparting desired characteristics, it is manufactured by punching as a film piece having a predetermined product shape using a punching device (Patent Document 1 below).

ここで、フィルム片の打抜き工程についてより具体的に説明すると、帯状のフィルムを所定の送りピッチ毎に打ち抜き装置へと送り出し、該打ち抜き装置にて、例えば図１０に示したように、送り出されたピッチ毎に所定形状のフィルム片を１枚又は複数枚（図１０においては５枚）打ち抜き、このような送り出しと打ち抜きとを交互に繰り返すことによって、帯状フィルムから多数のフィルム片を得るという方法が採用されている。
特開平１１−２３１１２９号公報 Here, the film piece punching process will be described in more detail. The belt-like film is fed to a punching device at a predetermined feed pitch, and is fed out by the punching device, for example, as shown in FIG. A method of obtaining a large number of film pieces from a belt-like film by punching one or a plurality of film pieces (five pieces in FIG. 10) of a predetermined shape for each pitch and alternately repeating such feeding and punching. It has been adopted.
JP-A-11-231129

しかしながら、上述のような従来の製造方法に於いては、打ち抜きを繰り返す際のフィルム片同士の隙間が広ければ製品とならない帯状フィルムの切れ端、即ち、帯状フィルムのロスが多くなり、帯状フィルムの面積歩留りが低下するという問題がある。
また、上述のような方法において、面積歩留りを高めるべく１ピッチ毎の打ち抜き間隔を狭くし過ぎると、打ち抜きが完了したフィルム片の一部を、その直後の打ち抜き作業において重複して打ち抜くという切断不良（以下、二度打ちともいう）の問題が発生しやすくなる。このような切断不良により得られたフィルム片は、予定された切断線で切断されておらず所定の製品形状を有さないもの（即ち、不良品）であるため、かえって製品となるフィルム片の歩留りが低下することとなる。 However, in the conventional manufacturing method as described above, if the gap between the film pieces when the punching is repeated is wide, the strip of the strip film that does not become a product, that is, the loss of the strip film increases, and the area of the strip film There is a problem that the yield decreases.
Further, in the above-described method, if the punching interval for each pitch is made too narrow in order to increase the area yield, the cutting failure that a part of the film piece that has been punched is punched repeatedly in the punching operation immediately after that. The problem (hereinafter also referred to as double strike) is likely to occur. Since the film piece obtained by such a cutting defect is not cut by a predetermined cutting line and does not have a predetermined product shape (that is, a defective product), the film piece that becomes the product instead The yield will be reduced.

本発明は、このような従来技術の問題点に鑑みてなされたものであり、帯状フィルムから製品となるフィルム片を打ち抜いて製造するに際し、打ち抜かれたフィルム片の歩留まりを低下させることなく、打ち抜き対象となる帯状フィルムの面積歩留まりをも向上させうるようなフィルム片の製造方法を提供することを一の目的とする。   The present invention has been made in view of the above-described problems of the prior art, and when punching and producing a film piece as a product from a belt-like film, the punching is performed without reducing the yield of the punched film piece. One object of the present invention is to provide a method for producing a film piece that can also improve the area yield of a target strip-shaped film.

本発明は、帯状フィルムを所定の送りピッチ毎に打ち抜き、該帯状フィルムから複数のフィルム片を得るフィルム片の製造方法であって、１回の打ち抜きにより形成される切断線を前記フィルム片の輪郭の一部となるようにし、且つ該打ち抜きを所定の送りピッチで２回以上繰り返すことで該切断線が組み合わされた際に、前記フィルム片の輪郭全体が形成されるようにすることを特徴とするフィルム片の製造方法を提供するものである。   The present invention is a film piece manufacturing method for punching a belt-like film at a predetermined feed pitch and obtaining a plurality of film pieces from the belt-like film, wherein a cutting line formed by one punching is defined as the contour of the film piece. And the entire contour of the film piece is formed when the cutting lines are combined by repeating the punching twice or more at a predetermined feed pitch. The manufacturing method of the film piece to perform is provided.

斯かる構成によるフィルム片の製造方法によれば、所定の送りピッチ毎に繰り返し打ち抜きを行う際、１回の打ち抜きによって形成される切断線が、その前後の打ち抜きによって形成される切断線と組み合わされることで、フィルム片の輪郭全体が形成されることとなる。より具体的に説明すると、第ｎ回目の打ち抜きにより形成される切断線は、少なくともその１回前の第ｎ−１回目の打ち抜きにより形成される切断線と組み合わされて一のフィルム片の全輪郭を構成すると同時に、少なくともこれに続く第ｎ＋１回目の打ち抜きにより形成される切断線とも組み合わされて他のフィルム片の全輪郭を構成することとなる。
従って、斯かる打ち抜きを、送りピッチ毎に連続して行うことにより、打ち抜きを行うための帯状フィルムの送りピッチを、スキマ無く設定することができ、帯状フィルムの面積歩留りを向上させることができる。また、斯かる方法によれば、送りピッチ毎に形成される切断線同士を近接させる必要が無いため、切断不良を招く可能性が低くなり、フィルム片の歩留りを低下させないという効果もある。 According to the method of manufacturing a film piece having such a configuration, when repeatedly punching at a predetermined feed pitch, a cutting line formed by one punching is combined with a cutting line formed by punching before and after the punching. As a result, the entire outline of the film piece is formed. More specifically, the cutting line formed by the n-th punching is combined with at least the cutting line formed by the (n-1) -th punching before the entire outline of one film piece. And at the same time, combined with at least the cutting line formed by the (n + 1) th punching that follows, forms the entire contour of the other film piece.
Therefore, by continuously performing such punching for each feed pitch, the feed pitch of the strip film for punching can be set without gaps, and the area yield of the strip film can be improved. Moreover, according to such a method, it is not necessary to bring the cutting lines formed for each feed pitch close to each other, so that the possibility of causing a cutting failure is reduced and the yield of the film pieces is not lowered.

また、本発明は、帯状フィルムを所定の送りピッチ毎に打ち抜き、該帯状フィルムから複数のフィルム片を得るために使用されるフィルム切断用の切断刃であって、該切断刃による１回の打ち抜きにより形成される切断線が前記フィルム片の輪郭の一部となるように構成され、且つ該打ち抜きを所定の送りピッチで２回以上繰り返すことで該切断線が組み合わされた際に、前記フィルム片の輪郭全体が形成されるように構成されたことを特徴とするフィルム切断用の切断刃を提供する。   Further, the present invention is a film cutting blade used for punching a belt-like film at a predetermined feed pitch and obtaining a plurality of film pieces from the belt-like film, wherein the film is cut once by the cutting blade. When the cutting lines are combined to form a part of the contour of the film piece and the punching is repeated twice or more at a predetermined feed pitch, the film piece A cutting blade for cutting a film, characterized in that the entire contour of the film is formed.

さらに、本発明は、帯状フィルムを所定の送りピッチ毎に打ち抜き、該帯状フィルムから複数のフィルム片を得るように構成されたフィルム片の製造装置であって、１回の打ち抜きにより形成される切断線が前記フィルム片の輪郭の一部となるように構成され、且つ該打ち抜きを所定の送りピッチで２回以上繰り返すことで該切断線が組み合わされた際に、前記フィルム片の輪郭全体が形成されるように構成された切断刃を備えたことを特徴とするフィルム片の製造装置を提供する。   Furthermore, the present invention is a film piece manufacturing apparatus configured to punch a belt-like film at a predetermined feed pitch and obtain a plurality of film pieces from the belt-like film, wherein the cutting is formed by a single punching. The entire contour of the film piece is formed when the line is configured to be a part of the contour of the film piece and the cutting lines are combined by repeating the punching twice or more at a predetermined feed pitch. There is provided a film piece manufacturing apparatus comprising a cutting blade configured as described above.

以上のように、本発明に係るフィルム片の製造方法によれば、帯状フィルムから製品となるフィルム片を打ち抜いて製造するに際し、打ち抜かれたフィルム片の歩留まりを低下させることなく、帯状フィルムの面積歩留まりを向上させることが可能となる。   As described above, according to the method for producing a film piece according to the present invention, when producing a film piece as a product from the belt-like film, the area of the belt-like film is obtained without reducing the yield of the punched film piece. Yield can be improved.

また、本発明に係るフィルム切断用の切断刃、及びフィルム片の製造装置によれば、このようなフィルム片の製造方法を実施することができ、上記効果が奏されることとなる。   In addition, according to the cutting blade for film cutting and the apparatus for manufacturing a film piece according to the present invention, such a method for manufacturing a film piece can be carried out, and the above-described effects are exhibited.

図１は、本発明の一実施形態により作成されるフィルム片１の形状を示した平面図である。
図１に示すように、本実施形態により作成されるフィルム片１は、光学フィルム製品として使用される矩形状の本体部１１と、該本体部１１に付随して設けられ光学フィルムとして使用される前に切除される突出部１２とを備えた、６つの辺から構成されている。また、該フィルム片１は、全体として非対称形状、即ち、点対称又は線対称の何れでもない形状で構成されている。 FIG. 1 is a plan view showing the shape of a film piece 1 produced according to an embodiment of the present invention.
As shown in FIG. 1, a film piece 1 produced according to the present embodiment is used as an optical film provided with a rectangular main body 11 used as an optical film product, and accompanying the main body 11. It consists of six sides with a protrusion 12 that is cut away before. Further, the film piece 1 as a whole has an asymmetric shape, that is, a shape that is neither point-symmetric nor line-symmetric.

図２は、１回の打ち抜きにより帯状フィルムに形成される切断線（以下、「１ショット毎の切断線」ともいう）２を示した平面図である。図２に示すように、１ショット毎の切断線２は、帯状フィルムに対して所定の角度を成して配置された５枚のフィルム片１を同時に打ち抜くことを予定して構成されており、且つ、１ショット毎の切断線２のみではフィルム片１の全輪郭が打ち抜かれないように、個々のフィルム片１の輪郭の一部のみを形成するように構成されている。具体的には、１ショット毎の切断線２により、フィルム片１の全輪郭を構成する６つの辺のうち、その一部である１辺乃至５辺が形成されるよう構成されている。   FIG. 2 is a plan view showing a cutting line 2 (hereinafter also referred to as “cutting line for each shot”) 2 formed in the belt-like film by one punching. As shown in FIG. 2, the cutting line 2 for each shot is configured so as to simultaneously punch out five pieces of film 1 arranged at a predetermined angle with respect to the belt-like film, Further, only a part of the contour of each film piece 1 is formed so that the entire contour of the film piece 1 is not punched only by the cutting line 2 for each shot. Specifically, the cutting line 2 for each shot is configured to form one side to five sides that are a part of the six sides constituting the entire outline of the film piece 1.

斯かる切断線２を形成するために使用される切断刃は、刃の先端形状が、切断線２と同じ形状となるように形成されたものであり、例えば図３に示すような、一般に、トムソン刃と称される打ち抜き用の切断刃を、上記のような形状に構成したものを好適に使用することができる。   The cutting blade used to form such a cutting line 2 is formed so that the tip shape of the blade is the same shape as the cutting line 2, for example, as shown in FIG. A punching blade called a Thomson blade having a shape as described above can be suitably used.

そして、本実施形態のフィルム片の製造方法では、長尺状に作製された帯状フィルム３を所定の送りピッチ毎に送り出すフィルム送り出し工程と、該フィルム送り出し工程により送り出された各送りピッチ毎に、該帯状フィルム３を打ち抜いて上述のような切断線２を形成する打ち抜き工程とを、交互に繰り返して行う。   And in the manufacturing method of the film piece of this embodiment, for every sending pitch sent out by the film sending process which sends out the strip-shaped film 3 produced in the elongate shape for every predetermined sending pitch, and this film sending process, The punching process of punching the strip-shaped film 3 to form the cutting line 2 as described above is alternately repeated.

従って、本実施形態において使用されるフィルム片の製造装置は、長尺状に作製された帯状フィルム３を所定の送りピッチ毎に送り出すフィルム送り出し機構と、該フィルム送り出し機構により送り出された帯状フィルム３を各送りピッチ毎に前記切断刃によって打ち抜いて上述のような切断線２を形成する打ち抜き機構とを備えており、フィルム送り出し機構によるフィルム送り出し操作と、打ち抜き機構によるフィルムの打ち抜き操作とを交互に繰り返して行いうるように構成されている。   Therefore, the film piece manufacturing apparatus used in the present embodiment includes a film feeding mechanism that feeds the strip-shaped film 3 produced in a long shape at every predetermined feeding pitch, and the strip-shaped film 3 fed by the film feeding mechanism. Are punched by the cutting blade at each feed pitch to form the cutting line 2 as described above, and the film feed operation by the film feed mechanism and the film punching operation by the punch mechanism are alternately performed. It is configured so that it can be repeated.

図４は、このような切断線２が形成される打ち抜き工程と、所定ピッチの送り出し工程とを繰り返し、帯状フィルム３が送りピッチ毎に打ち抜かれる状態を説明した図である。図４に示すように、帯状フィルム３は打ち抜き工程を経る毎に１ピッチずつ下流側（図４において左側）へと送られ、帯状フィルム３上には、上記図２に示したような切断線２が繰り返し形成され、これらの切断線２が互いに組み合わされることでフィルム片１の全輪郭が構成されていく。   FIG. 4 is a diagram illustrating a state in which the punching process in which such a cutting line 2 is formed and the feeding process at a predetermined pitch are repeated, and the strip film 3 is punched for each feeding pitch. As shown in FIG. 4, the strip-shaped film 3 is sent to the downstream side (left side in FIG. 4) by one pitch every time the punching process is performed, and a cutting line as shown in FIG. 2 is repeatedly formed, and these cutting lines 2 are combined with each other to form the entire contour of the film piece 1.

より具体的には、図４に示したように、第ｎ回目の打ち抜き工程により形成される切断線を２ａ、第ｎ＋１回目の打ち抜き工程により形成される切断線を２ｂ、第ｎ＋２回目の打ち抜き工程により形成される切断線を２ｃとすると、１回で同時に打ち抜かれる５枚のフィルム片１のうちの一部は、第ｎ回目と第ｎ＋１回目の連続する２回の打ち抜き工程にて形成される切断線２ａおよび２ｂ、或いは、第ｎ＋１回目と第ｎ＋２回目の連続する２回の打ち抜き工程にて形成される切断線２ｂおよび２ｃにより、全輪郭が構成され、他の一部は、第ｎ回目乃至第ｎ＋２回目の３回の打ち抜き工程にて形成される切断線２ａ、２ｂおよび２ｃにより、全輪郭が構成されている。   More specifically, as shown in FIG. 4, the cutting line formed by the nth punching process is 2a, the cutting line formed by the (n + 1) th punching process is 2b, and the (n + 2) th punching process. If the cutting line formed by 2 is 2c, a part of the five film pieces 1 that are simultaneously punched at one time is formed by two successive punching steps of the nth time and the (n + 1) th time. The cutting lines 2a and 2b, or the cutting lines 2b and 2c formed in the two consecutive punching steps of the (n + 1) th time and the (n + 2) th time form the entire contour, and the other part is the nth time Through cutting lines 2a, 2b, and 2c formed in the three punching steps from the (n + 2) th time, the entire contour is formed.

図５は、第ｎ＋２回目の打ち抜き工程にて形成された切断線２の拡大図と、この第ｎ＋２回目の打ち抜き工程にて全輪郭が構成されたフィルム片１のうち、２枚を取り出して示した図である。例えば、図５（イ）において上方側に位置するフィルム片１ａは、図５（ロ）に示すように、第ｎ＋１回目と第ｎ＋２回目の連続する２回の打ち抜き工程にて形成される切断線２ｂおよび２ｃにより全輪郭が構成されている。一方、図５（イ）において下方側に位置するフィルム片１ｂは、第ｎ回目から第ｎ＋２回目までの連続する３回の打ち抜き工程にて形成される切断線２ａ、２ｂおよび２ｃにより全輪郭が構成されている。   FIG. 5 shows an enlarged view of the cutting line 2 formed in the (n + 2) th punching process and two out of the film pieces (1) in which the entire contour is formed in the (n + 2) th punching process. It is a figure. For example, as shown in FIG. 5 (b), the film piece 1a positioned on the upper side in FIG. 5 (a) has a cutting line formed by two successive punching steps of the (n + 1) th time and the (n + 2) th time. The entire contour is constituted by 2b and 2c. On the other hand, the film piece 1b located on the lower side in FIG. 5 (a) has a full outline due to the cutting lines 2a, 2b, and 2c formed in three consecutive punching steps from the n-th time to the (n + 2) -th time. It is configured.

また、図５において、帯状フィルム３の下方側に位置するフィルム片１ｂのように、フィルム片１の本体部１１の輪郭が連続する切断線２の組み合わせ（図５においては、切断線２ｂと切断線２ｃ）により構成されるものについては、好ましくは、１回の打ち抜きにより形成される切断線２が、帯状フィルム３の送り方向上流側を残すように形成される。   Moreover, in FIG. 5, like the film piece 1b located in the downward side of the strip | belt-shaped film 3, the combination of the cutting line 2 with which the outline of the main-body part 11 of the film piece 1 continues (In FIG. 5, it cuts with the cutting line 2b and cutting | disconnection). For the one constituted by the line 2c), the cutting line 2 formed by one punching is preferably formed so as to leave the upstream side in the feed direction of the strip film 3.

斯かる構成のフィルム片の製造方法によれば、打ち抜きにより形成される切断線２が、その前後の打ち抜き工程により形成される切断線２と組み合わされることによりフィルム片１の全輪郭を形成するものであるため、打ち抜き工程間でフィルム片１が互いに隣接した状態となって打ち抜き工程間に生じる切断線２の隙間が無くなるため、帯状フィルム３の面積歩留りを大幅に向上させうるという効果がある。
しかも、打ち抜き工程間に生じる切断線２の隙間が無いため、打ち抜きの際のフィルムの切断不良が生じにくく、製造されたフィルム片１の歩留りを低下させることも無い。 According to the method of manufacturing a film piece having such a configuration, the cutting line 2 formed by punching is combined with the cutting line 2 formed by the punching process before and after the punching line to form the entire outline of the film piece 1. Therefore, since the film pieces 1 are adjacent to each other during the punching process and the gap between the cutting lines 2 generated during the punching process is eliminated, the area yield of the belt-like film 3 can be greatly improved.
And since there is no gap of the cutting line 2 which arises between punching processes, the cutting defect of the film in the case of punching does not arise easily, and the yield of the manufactured film piece 1 is not reduced.

さらに、本実施形態に係るフィルム片の製造方法では、フィルム片１の本体部１１の輪郭が連続する切断線２の組み合わせにより構成されるものについては、１回の打ち抜きにより形成される切断線２が、帯状フィルム３の送り方向上流側を残すように形成されている。
つまり、斯かるフィルム片１においては、全輪郭が打ち抜かれてフィルム片１が帯状フィルム３から完全に切り離された状態となった際には、該フィルム片１は既に打ち抜き位置よりも下流側に位置することとなるため、その後の送り工程によって切り離されたフィルム片１が帯状フィルム３から位置ズレした場合であっても、該フィルム片１を誤って二度打ち抜きする可能性を低減できるという効果がある。 Furthermore, in the manufacturing method of the film piece which concerns on this embodiment, about the thing comprised by the combination of the cutting line 2 with which the outline of the main-body part 11 of the film piece 1 continues, the cutting line 2 formed by one punching However, it is formed so as to leave the upstream side in the feed direction of the belt-like film 3.
That is, in such a film piece 1, when the entire contour is punched and the film piece 1 is completely separated from the strip-like film 3, the film piece 1 is already on the downstream side of the punching position. Since it will be located, even if it is a case where the film piece 1 cut | disconnected by the subsequent sending process has shifted | deviated from the strip | belt-shaped film 3, the effect that the possibility of punching this film piece 1 twice accidentally can be reduced. There is.

また、本実施形態に係るフィルム片の製造方法によれば、フィルム片１の全輪郭が、複数の打ち抜き工程を繰り返して行うことによって構成されるため、一度に全輪郭を打ち抜くような従来の方法と比較して、フィルム片１の面方向に掛かる引張応力が低減されるという効果がある。このため、光学フィルムの製造に於いてこのような方法を採用することにより、フィルムの光学特性への悪影響が低減され、光学特性に優れた光学フィルムを製造しうるという効果がある。本発明において使用される帯状フィルムとしては、光軸を有する光学フィルムを好適に使用することができ、本発明により得られたフィルム片は、例えば、液晶テレビや携帯電話等の液晶表示装置に使用される光学フィルム製品として好適に使用されうる。
前記光軸を有する光学フィルムとしては、具体的には、位相差フィルムや偏光フィルムのほか、これらが積層されてなるものを挙げることができる。 In addition, according to the method for manufacturing a film piece according to the present embodiment, since the entire contour of the film piece 1 is configured by repeatedly performing a plurality of punching steps, the conventional method of punching the entire contour at a time. As compared with the above, there is an effect that the tensile stress applied in the surface direction of the film piece 1 is reduced. For this reason, by adopting such a method in the production of an optical film, there is an effect that an adverse effect on the optical properties of the film is reduced and an optical film having excellent optical properties can be produced. As the strip-like film used in the present invention, an optical film having an optical axis can be suitably used, and the film piece obtained by the present invention is used for a liquid crystal display device such as a liquid crystal television or a mobile phone. It can be suitably used as an optical film product.
Specifically as an optical film which has the said optical axis, what laminated | stacked these other than a retardation film and a polarizing film can be mentioned.

また、本発明における帯状フィルムとしては、光軸を有する上記フィルムと光軸を有さない他のフィルムとが積層されてなる光学フィルムや、光軸を有さないフィルムのみを対象とすることもでき、このような場合にも同様の優れた効果が発揮される。   Moreover, as a strip | belt-shaped film in this invention, only the film which does not have an optical axis, and the optical film formed by laminating | stacking the said film which has an optical axis, and the other film which does not have an optical axis may be object. In such a case, the same excellent effect is exhibited.

また、本実施形態に係るフィルム片の製造方法によれば、フィルム片１が矩形状の本体部１１と該本体部１１に付随して設けられた突出部１２とを備えた非対称形状で構成されているため、打ち抜き後に該フィルム片１を取り扱う際にも、フィルム片１に形成された光軸の方向を間違えることがないという効果がある。   Further, according to the method for manufacturing a film piece according to the present embodiment, the film piece 1 is configured in an asymmetric shape including a rectangular main body portion 11 and a protruding portion 12 provided along with the main body portion 11. Therefore, even when the film piece 1 is handled after punching, there is an effect that the direction of the optical axis formed on the film piece 1 is not mistaken.

尚、本発明は上記のような実施形態に限定されるものではなく、本発明の範囲を逸脱しない範囲内において種々の変更が可能である。
例えば、上記実施形態においては、切断刃による一回の打ち抜きで打ち抜くフィルム片の数を５枚としたが、本発明はこれに限定されるものではなく、帯状フィルムの幅や製品となるフィルム片の大きさ、或いは帯状フィルムに対するフィルム片の角度等により、適宜変更することが可能である。 The present invention is not limited to the embodiment as described above, and various modifications can be made without departing from the scope of the present invention.
For example, in the above embodiment, the number of film pieces to be punched by one punching with the cutting blade is five, but the present invention is not limited to this, and the film pieces to be used as the width of the belt-like film or the product. Depending on the size of the film or the angle of the film piece with respect to the belt-like film, it can be appropriately changed.

具体的には、図６に示すように、切断刃による一回の打ち抜きで打ち抜くフィルム片の数を４枚とすることもでき、図７に示すように、このような切断線２が形成される打ち抜き工程と、所定ピッチの送り出し工程とを繰り返すことにより、フィルム片１を製造してもよい。
また、図８に示すように、切断刃による一回の打ち抜きで打ち抜くフィルム片の数を６枚とすることもでき、図９に示すように、このような切断線２が形成される打ち抜き工程と、所定ピッチの送り出し工程とを繰り返すことにより、フィルム片１を製造してもよい。 Specifically, as shown in FIG. 6, the number of film pieces to be punched by one punching with a cutting blade can be set to four, and such a cutting line 2 is formed as shown in FIG. The film piece 1 may be manufactured by repeating the punching step and the feeding step with a predetermined pitch.
Also, as shown in FIG. 8, the number of film pieces punched by one punching with a cutting blade can be six, and as shown in FIG. 9, a punching process in which such a cutting line 2 is formed. And you may manufacture the film piece 1 by repeating the sending process of a predetermined pitch.

また、前記実施形態では、フィルム片１を図１に示したような非対称形状とすることにより、光軸方向の判別を容易なものとしたが、本発明はこれに限定されるものではなく、製造するフィルム片１の形状は、任意の形状とすることができる。   Moreover, in the said embodiment, although the film piece 1 was made into the asymmetrical shape as shown in FIG. 1, it became easy to discriminate | determine the optical axis direction, but this invention is not limited to this, The shape of the film piece 1 to manufacture can be made into arbitrary shapes.

本発明の一実施形態に係るフィルム片の製造方法により製造されたフィルム片の形状を示した平面図。The top view which showed the shape of the film piece manufactured by the manufacturing method of the film piece which concerns on one Embodiment of this invention. 本発明の一実施形態に係るフィルム片の製造方法において、一回の打ち抜きにより形成される切断線を示した図。The figure which showed the cutting line formed by one punching in the manufacturing method of the film piece which concerns on one Embodiment of this invention. 該実施形態で使用する切断刃の形状を、その裏側から見た斜視図。The perspective view which looked at the shape of the cutting blade used in this embodiment from the back side. 本発明の一実施形態に係るフィルム片の製造方法において、帯状フィルムが送りピッチ毎に打ち抜かれる状態を説明した図。The figure explaining the state by which a strip | belt-shaped film is pierce | punched for every feed pitch in the manufacturing method of the film piece which concerns on one Embodiment of this invention. （イ）図３における第ｎ＋２ショット目の拡大図、（ロ）第ｎ＋２ショット目の打ち抜き工程にて全輪郭が構成されたフィルム片１のうち、２枚を取り出して示した図。(B) An enlarged view of the n + 2th shot in FIG. 3, (b) A drawing showing two pieces taken out of the film piece 1 having the entire contour formed in the punching process of the n + 2th shot. 一回の打ち抜きにより形成される切断線の他の形態を示した図。The figure which showed the other form of the cutting line formed by one punching. 本発明の他の実施形態に係るフィルム片の製造方法において、帯状フィルムが送りピッチ毎に打ち抜かれる状態を説明した図。The figure explaining the state by which a strip | belt-shaped film is pierce | punched for every feed pitch in the manufacturing method of the film piece which concerns on other embodiment of this invention. 一回の打ち抜きにより形成される切断線の他の形態を示した図。The figure which showed the other form of the cutting line formed by one punching. 本発明の他の実施形態に係るフィルム片の製造方法において、帯状フィルムが送りピッチ毎に打ち抜かれる状態を説明した図。The figure explaining the state by which a strip | belt-shaped film is pierce | punched for every feed pitch in the manufacturing method of the film piece which concerns on other embodiment of this invention. 従来のフィルム片の製造方法を示した図。The figure which showed the manufacturing method of the conventional film piece.

符号の説明Explanation of symbols

１ フィルム片
２ 切断線
２ａ 第ｎ回目の打ち込みにより形成された切断線
２ｂ 第ｎ＋１回目の打ち込みにより形成された切断線
２ｃ 第ｎ＋２回目の打ち込みにより形成された切断線
３ 帯状フィルム
１１ フィルム片の本体部
１２ フィルム片の突出部
２０ 切断刃 DESCRIPTION OF SYMBOLS 1 Film piece 2 Cutting line 2a Cutting line 2b formed by the n-th implantation | cutting line 2c Cutting line 2c formed by the (n + 1) th implantation | cutting 3 Cutting line formed by the n + 2nd implantation | development 3 Strip | belt-shaped film 11 Film body Part 12 Projection part 20 of film piece Cutting blade

Claims (6)

帯状フィルムを所定の送りピッチ毎に打ち抜き、該帯状フィルムから複数のフィルム片を得るフィルム片の製造方法であって、
１回の打ち抜きにより形成される切断線を前記フィルム片の輪郭の一部となるようにし、且つ該打ち抜きを所定の送りピッチで２回以上繰り返すことで該切断線が組み合わされた際に、前記フィルム片の輪郭全体が形成されるようにすることを特徴とするフィルム片の製造方法。 A method for producing a film piece, which is obtained by punching a belt-like film at a predetermined feed pitch and obtaining a plurality of film pieces from the belt-like film,
When the cutting line formed by one punching becomes a part of the contour of the film piece and the cutting lines are combined by repeating the punching twice or more at a predetermined feed pitch, A method for producing a film piece, characterized in that the entire outline of the film piece is formed. 前記フィルム片が、光学フィルムであることを特徴とする請求項１記載のフィルム片の製造方法。   The method for producing a film piece according to claim 1, wherein the film piece is an optical film. 前記打ち抜かれるフィルム片が、光学フィルムとして使用される矩形状の本体部と、該本体部に付属して設けられ光学フィルムとして使用される前に除去される突出部とを備え、該フィルム片が非対称形状となるように形成されることを特徴とする請求項２記載のフィルム片の製造方法。   The film piece to be punched includes a rectangular main body part used as an optical film, and a protruding part that is attached to the main body part and removed before being used as an optical film. 3. The method for producing a film piece according to claim 2, wherein the film piece is formed so as to have an asymmetric shape. 前記１回の打ち抜きにより形成される切断線が、フィルム片の輪郭のうち、帯状フィルムの送り方向上流側を残すように形成されることを特徴とする請求項１〜３の何れかに記載のフィルム片の製造方法。   The cutting line formed by the one punching is formed so as to leave the upstream side in the feeding direction of the belt-shaped film in the outline of the film piece. A method for producing a film piece. 帯状フィルムを所定の送りピッチ毎に打ち抜き、該帯状フィルムから複数のフィルム片を得るために使用されるフィルム切断用の切断刃であって、
該切断刃による１回の打ち抜きにより形成される切断線が前記フィルム片の輪郭の一部となるように構成され、且つ該打ち抜きを所定の送りピッチで２回以上繰り返すことで該切断線が組み合わされた際に、前記フィルム片の輪郭全体が形成されるように構成されたことを特徴とするフィルム切断用の切断刃。 A cutting blade for cutting a film used for punching a belt-like film at a predetermined feed pitch and obtaining a plurality of film pieces from the belt-like film,
A cutting line formed by one punching with the cutting blade is configured to be a part of the outline of the film piece, and the cutting lines are combined by repeating the punching at a predetermined feed pitch twice or more. A cutting blade for cutting a film, characterized in that when formed, the entire contour of the film piece is formed. 帯状フィルムを所定の送りピッチ毎に打ち抜き、該帯状フィルムから複数のフィルム片を得るように構成されたフィルム片の製造装置であって、
１回の打ち抜きにより形成される切断線が前記フィルム片の輪郭の一部となるように構成され、且つ該打ち抜きを所定の送りピッチで２回以上繰り返すことで該切断線が組み合わされた際に、前記フィルム片の輪郭全体が形成されるように構成された切断刃を備えたことを特徴とするフィルム片の製造装置。 A film piece manufacturing apparatus configured to punch a band-shaped film at a predetermined feeding pitch and obtain a plurality of film pieces from the band-shaped film,
When the cutting line formed by one punching is configured to be a part of the contour of the film piece, and the cutting lines are combined by repeating the punching twice or more at a predetermined feed pitch An apparatus for producing a film piece, comprising: a cutting blade configured to form an entire contour of the film piece.
JP2008198190A 2007-08-08 2008-07-31 Film piece manufacturing method, cutting blade for cutting film and film piece manufacturing apparatus Pending JP2009056583A (en)

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JPH0544498U (en) * 1991-11-28 1993-06-15 正一 鈴木 Multiple type continuous cutting type
JP2007187781A (en) * 2006-01-12 2007-07-26 Sumitomo Chemical Co Ltd Method for manufacturing optical film product

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* Cited by examiner, † Cited by third party
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CN108247749A (en) * 2017-06-13 2018-07-06 住华科技股份有限公司 Cutting knife die, cutting equipment applying same and cutting method
JP2019000976A (en) * 2017-06-13 2019-01-10 住華科技股▲ふん▼有限公司 Cutting trim die, and cutting apparatus and cutting method using the same
KR20200067262A (en) * 2017-06-13 2020-06-12 주식회사 스미카 테크놀로지 Cutting tool die, cutting apparatus using the same and cutting method using the same
KR102193878B1 (en) * 2017-06-13 2020-12-22 주식회사 스미카 테크놀로지 Cutting tool die, cutting apparatus using the same and cutting method using the same

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