(19)
(11)EP 3 115 179 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
20.06.2018 Bulletin 2018/25

(21)Application number: 15758518.3

(22)Date of filing:  14.01.2015
(51)International Patent Classification (IPC): 
B29C 59/04(2006.01)
B29C 47/00(2006.01)
B29C 43/22(2006.01)
B29C 43/46(2006.01)
B29L 31/34(2006.01)
B29C 47/88(2006.01)
B29C 35/02(2006.01)
B29C 43/02(2006.01)
B29C 59/02(2006.01)
B29L 7/00(2006.01)
(86)International application number:
PCT/JP2015/050776
(87)International publication number:
WO 2015/133170 (11.09.2015 Gazette  2015/36)

(54)

SHEET MANUFACTURING APPARATUS AND SHEET MANUFACTURING METHOD

FOLIENHERSTELLUNGSVORRICHTUNG UND FOLIENHERSTELLUNGSVERFAHREN

APPAREIL ET PROCÉDÉ DE FABRICATION DE FEUILLE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 07.03.2014 JP 2014044832

(43)Date of publication of application:
11.01.2017 Bulletin 2017/02

(73)Proprietors:
  • Mitsubishi Gas Chemical Company, Inc.
    Tokyo 100-8324 (JP)
  • MGC Filsheet Co., Ltd.
    Saitama 359-1164 (JP)

(72)Inventor:
  • AKITA Reiki
    Tokyo 125-8601 (JP)

(74)Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)


(56)References cited: : 
WO-A1-2006/001997
JP-A- H08 110 723
JP-A- H09 212 023
JP-A- 2011 191 648
JP-B2- 5 111 800
JP-A- H0 934 295
JP-A- H09 212 023
JP-A- 2003 243 129
JP-A- 2012 025 016
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Technical Field



    [0001] The present invention relates to a sheet manufacturing apparatus and method for manufacturing a sheet including microstructures in a surface thereof, and more specifically relates to a sheet manufacturing apparatus and method for manufacturing a prism sheet to be used for a back-lighting device in a liquid-crystal display apparatus.

    Background Art



    [0002] A back-lighting device in a general liquid-crystal display apparatus mainly includes a light source, a light-guiding plate (light-guiding film) that guides light from the light source; a reflective sheet that reflects light passing through the light-guiding plate, a diffusion sheet for homogenizing light emitted from a light-emission surface of the light-guiding plate, and a prism sheet that enhances a luminance of the light in a perpendicular direction of the light-emission surface.

    [0003] A method for manufacturing such prism sheet will be described. A conventional manufacturing apparatus 10, which is illustrated in Figure 5, includes a die 1 that receives and extrudes a heated resin, a rectangular extrusion outlet 2 formed in the die 1, a main roll 3, and a follower roll 4. The main roll 3 and the follower roll 4 are disposed below the extrusion outlet 2 so as to sandwich a resin sheet 11 to be shaped therebetween, the resin sheet 11 being extruded from the extrusion outlet 2. In a surface of the main roll 3, microstructures for transferring prism shapes to the resin sheet 11 are formed.

    [0004] The manufacturing apparatus 10 lets the heated resin sheet 11 through between the main roll 3 and the follower roll 4 and thereby shapes the resin sheet 11 into a prism sheet 12. In the shaping, as a result of the main roll 3 and the resin sheet being brought into contact with each other, a temperature of a surface of the resin sheet 11 decreases in area A of the main roll 3 illustrated in Figure 5, and the resin sheet 11 thus becomes hard, which causes the problem of failure to accurately transfer the microstructures in the roll 3 to the resin sheet 11.

    [0005] Therefore, in order to solve such problem, apparatuses including a mechanism that heats a vicinity of area A of the main roll 3 have been proposed. For example, Japanese Patent No. 5111800 describes a sheet molding apparatus in which a heating unit including a plurality of heat-transfer heaters is embedded in an outermost layer of a main roll 11 and the heat-transfer heaters are independently controlled, thereby preventing decrease in temperature of a resin sheet, as illustrated in Figure 5 thereof. Furthermore, Japanese Patent No. 5111800 also describes a sheet molding apparatus in which a radiation heating device such as a laser or a halogen lamp is provided outside a main roll to heat an outermost layer of the main roll 11, as illustrated in Figure 6 thereof.

    Citation List


    Patent Literature



    [0006] Patent Literature 1
    Japanese Patent No. 5111800

    Summary of Invention


    Technical Problem



    [0007] However, in the sheet molding apparatus in Japanese Patent No. 5111800, the heating unit is embedded in the outermost layer of the main roll 11, which results in the problem of complication of a structure of the outermost layer of the main roll, and with repeated heating of the outermost layer, the outermost layer deteriorates and is more likely to be broken. Also, the radiation heating device described in Japanese Patent No. 5111800 is unable to directly heat an area of the outermost layer of the main roll, the area being in contact with a resin sheet. Thus, the heating efficiency is poor and it is difficult to set proper heating conditions.

    [0008] Therefore, an object of the present invention is to provide a sheet manufacturing apparatus and method that enable a resin sheet to be heated to a proper temperature via a main roll, without complicating a structure of an outermost layer of the main roll.

    Solution to Problem



    [0009] In order to solve the aforementioned problems, the present invention is intended to supply power to a conductor in an outermost layer of a main roll to make the conductor generate heat. In other words, aspects of the present invention are as follows. Aspect 1 provides a sheet manufacturing apparatus including a nozzle for extruding a heated resin sheet, a main roll including a surface portion with a microstructure formed therein, and a follower roll disposed at a distance from the main roll, the sheet being pressed between the main roll and the follower roll to transfer the microstructure to the sheet, the apparatus including: a conductive portion in the surface portion; and a power supply mechanism that supplies power to the conductive portion from opposite ends of the main roll in order to make the conductive portion generate heat.

    [0010] Aspect 2 provides the sheet manufacturing apparatus according to aspect 1, wherein the power supply mechanism includes a pair of terminal portions that are in contact with the conductive portion at the opposite ends of the main roll, respectively, and a power source that supplies power to the conductive portion via the pair of terminal portions. Aspect 3 provides the sheet manufacturing apparatus according to aspect 2, wherein the terminal portions each include a looped conductive belt that is in contact with the conductive portion, a roll-side pulley that presses the conductive belt against the conductive portion, and a tension pulley that maintains tension of the conductive belt. Aspect 4 provides the sheet manufacturing apparatus according to aspect 3, wherein the conductive belt is a stainless steel belt. Aspect 5 provides the sheet manufacturing apparatus according to aspect 2, wherein the terminal portions include a pair of conductive brushes or conductive pulleys that are in contact with the conductive portion at the opposite ends of the main roll, respectively, and a power source that supplies power to the conductive portion via the pair of conductive brushes or conductive pulleys.

    [0011] Aspect 6 provides the sheet manufacturing apparatus according to any one of aspects 1 to 5, wherein the conductive portion is a conductive sleeve. Aspect 7 provides the sheet manufacturing apparatus according to any one of aspects 1 to 5, wherein the conductive portion is a plating layer. Aspect 8 provides the sheet manufacturing apparatus according to any one of aspects 1 to 7, wherein a part of the conductive portion, the part being parallel to a rotation axis direction of the main roll, is made to generate heat using the power supply mechanism. Aspect 9 provides the sheet manufacturing apparatus according to any one of aspects 1 to 8, wherein the conductive portion of the main roll is made to generate heat on a side on which the sheet is guided between the main roll and the follower roll.

    [0012] Aspect 10 provides a sheet manufacturing method for shaping a resin sheet using a main roll including a surface portion with a microstructure formed therein, and a follower roll disposed at a distance from the main roll, the method including the steps of: extruding the heated sheet from a nozzle; supplying power to a conductive portion of the surface portion from opposite ends of the main roll via a power supply mechanism; making the conductive portion generate heat using the power supplied by the power supply mechanism; and pressing the resin sheet between the main roll and the follower roll in a state in which the conductive portion generates heat, thereby transferring the microstructure to the resin sheet.

    [0013] Aspect 11 provides the sheet manufacturing method according to claim 10, wherein the power supply mechanism includes a pair of terminal portions that are in contact with the conductive portion at the opposite ends of the main roll, respectively, and a power source that supplies power to the conductive portion via the pair of terminal portions. Aspect 12 provides the sheet manufacturing method according to aspect 11, wherein the terminal portions each include a looped conductive belt that is in contact with the conductive portion, a roll-side pulley that presses the conductive belt against the conductive portion, and a tension pulley that maintains tension of the conductive belt. Aspect 13 provides the sheet manufacturing method according to aspect 12, wherein the conductive belt is a stainless steel belt. Aspect 14 provides the sheet manufacturing apparatus according to aspect 11, wherein the terminal portions include a pair of conductive brushes or conductive pulleys that are in contact with the conductive portion at the opposite ends of the main roll, respectively, and a power source that supplies power to the conductive portion via the pair of conductive brushes or conductive pulleys.

    [0014] Aspect 15 provides the sheet manufacturing method according to any one of aspects 10 to 14, wherein the conductive portion is a conductive sleeve. Aspect 16 provides the sheet manufacturing method according to any one of claims 10 to 14, wherein the conductive portion is a plating layer. Aspect 17 provides the sheet manufacturing method according to any one of aspects 10 to 16, wherein the step of making the conductive portion generate heat includes making a part of the conductive portion, the part being parallel to a rotational axis direction of the main roll, generate heat. Aspect 18 provides the sheet manufacturing method according to any one of aspects 10 to 17, wherein the step of making the conductive portion generate heat includes making the conductive portion of the main roll generate heat on a side on which the sheet is guided between the main roll and the follower roll.

    Advantageous Effects of Invention



    [0015] The present invention enables a surface part of a main roll to be maintained at a proper temperature in order to transfer microstructures in the main roll to a sheet, without complicating an outermost layer structure of the main roll and thus enables efficient manufacturing of a sheet including microstructures.

    Brief Description of Drawings



    [0016] 

    [Figure 1] Figure 1 is a schematic configuration diagram of a sheet manufacturing apparatus according to a first embodiment of the present invention.

    [Figure 2] Figure 2 is a perspective diagram illustrating a main roll and a power supply mechanism in the sheet manufacturing apparatus in Figure 1.

    [Figure 3] Figure 3 is an enlarged view of a major part of a power supply mechanism according to a second embodiment of the present invention.

    [Figure 4] Figure 4 is an enlarged view of a major part of a power supply mechanism according to a third embodiment of the present invention.

    [Figure 5] Figure 5 is a schematic configuration diagram of a conventional sheet manufacturing apparatus.


    Description of Embodiments



    [0017] Embodiments of a sheet manufacturing apparatus and a sheet manufacturing method according to the present invention will be described with reference to the drawings. In the drawings of the embodiments, parts that are identical to each other are provided with a same reference numeral and description thereof will not be repeated.

    (First Embodiment)



    [0018] A sheet manufacturing apparatus according to a first embodiment will be described with reference to Figures 1 and 2. As illustrated in Figure 1, a sheet manufacturing apparatus 100 includes a die 101 that receives and extrudes a heated resin such as polycarbonate, a rectangular extrusion outlet 102 formed in the die 101, a main roll 130 with microstructures, such as prisms, for transfer in a surface thereof, a follower roll 140, and a power supply mechanism 150 that supplies power to the main roll 130. The main roll 130 and the follower roll 140 are disposed below the extrusion outlet 102 so as to sandwich a resin sheet 110 to be shaped therebetween, the resin sheet 110 being extruded from the extrusion outlet 102. In an entire circumference of a surface portion 131 of the main roll 130, microstructures for transferring prism shapes to the resin sheet 110 and a later-described conductive portion 131a formed by, e.g., plating or a sleeve are formed.

    [0019] As illustrated in Figure 2, the power supply mechanism 150 includes a first terminal portion 153 that is in contact with the conductive portion 131a on the left end side of the main roll 130, a second terminal portion 154 that is in contact with the conductive portion 131a on the right end side of the main roll 130, and a power source 155 electrically connected to the first terminal portion 153 and the second terminal portion 154 via wirings 156. The first terminal portion 153 includes a conductive belt 153c that is in contact with the conductive portion 131a that is exposed to a curved surface on the left end side of the main roll 130, roll-side pulleys 153a and 153b that press the conductive belt 153c against the conductive portion 131a, and a tension pulley 153d provided at a position distant from the main roll 130. Proper tension of the conductive belt 153c is maintained by the tension pulley 153d, whereby an outer surface of a part of the conductive belt 153c between the roll-side pulleys 153a and 153b is brought into surface contact with the conductive portion 131a on the left end side of the main roll 130.

    [0020] The second terminal portion 154 includes a conductive belt 154c that is in contact with the conductive portion 131a that is exposed to the curved surface on the right end side of the main roll 130, roll-side pulleys 154a and 154b that press the conductive belt 154c against the conductive portion 131a, and a tension pulley 154d provided at a position distant from the main roll 130. Proper tension of the conductive belt 154c is maintained by the tension pulley 154d, whereby a surface of a part of the conductive belt 154c positioned between the roll-side pulleys 154a and 154b is brought into surface contact with the conductive portion 131a on the left end side of the main roll 130. Upon power supply from the first terminal portion 153 and the second terminal portion 154 to the conductive portion 131a, a heat generation area 131b positioned between the first terminal portion 153 and the second terminal portion 154 generates heat. Here, in order to electrically interconnect the conductive belts 153c and 154c, which rotate, and the respective wirings 156, conductive brushes can be provided at respective terminal portion-side ends of the wirings 156. Although the follower roll 140 is not illustrated in Figure 2, the follower roll 140 has a length in a rotation axis direction that is smaller than that of the main roll 130 so as not to become an obstacle to the first terminal portion 153 and the second terminal portion 154.

    [0021] The pulleys are rotatably held by, e.g., non-illustrated holding members such as frames. The conductive belt 153c is preferably formed from stainless steel (SUS), but may be formed from another conductive material such as conductive rubber. The power source 155 can provide power of, for example, around 10 V and 200 A.
    [Table 1]
     Conventional main roll (°C)Main roll in embodiment (°C)
    Temperature of heat medium 130 110-120
    Temperature of heat generation area - 150-160


    [0022] In the first embodiment, a temperature of a resin sheet can be increased to a temperature that is favorable for transfer of the microstructures, by heat generated by the heat generation area 131b itself, and thus, even if a roll rotation speed and a resin sheet feeding speed are increased, the microstructures can properly be transferred to the resin sheet, which provides an enhanced transfer efficiency.

    (Second Embodiment)



    [0023] A sheet manufacturing apparatus and method according to a second embodiment will be described with reference to Figure 3. The sheet manufacturing apparatus according to the second embodiment has a structure that is basically similar to that of the sheet manufacturing apparatus 100 illustrated in Figures 1 and 2. Therefore, only parts that are different from that of the sheet manufacturing apparatus 100 will be described. As shown in Figure 3, the sheet manufacturing apparatus according to the second embodiment has additional pulleys 163a that are in contact with the conductive belt 153c between the roll-side pulleys 154a and 154b.

    (Third Embodiment)



    [0024] A sheet manufacturing apparatus according to a third embodiment will be described with reference to Figure 4. The sheet manufacturing apparatus according to the third embodiment has a structure that is basically similar to that of the sheet manufacturing apparatus 100 illustrated in Figures 1 and 2, but is different from that of the sheet manufacturing apparatus 100 in terms of structures of first and second terminal portions of a power supply mechanism.

    [0025] Figure 4 is an enlarged view of a major part as a main roll 130 is viewed in a rotation axis direction. As illustrated in Figure 4, a first terminal portion 173 in the third embodiment includes a conductive brush 173a and a brush holder that holds the conductive brush 173a. Although not illustrated, a second terminal portion in the third embodiment has a structure that is similar to that of the first terminal portion 173 and is provided on another end side of a main roll 130. The conductive brushes provided at the opposite ends of the main roll are connected to a non-illustrated power source. It is also possible that conductive brushes are provided at the opposite ends of the main roll 130 and electrode portions fixed at respective positions that allow the electrode portions to face the respective conductive brushes are provided. Each of the electrode portions has an arc-like curved surface that is in contact with the corresponding conductive brush, and is connected to the power source.

    Reference Signs List



    [0026] 
    100
    sheet manufacturing apparatus
    101
    die
    102
    extrusion outlet
    110
    resin sheet
    120
    prism sheet
    130
    main roll
    131a
    conductive portion
    131b
    heat generation area
    140
    follower roll
    150
    power supply mechanism
    153
    first terminal portion
    153a
    roll-side pulley
    153b
    roll-side pulley
    153c
    conductive belt
    154d
    tension pulley
    154
    second terminal portion
    154a
    roll-side pulley
    154b
    roll-side pulley
    154c
    conductive belt
    154d
    tension pulley
    155
    power source



    Claims

    1. A sheet manufacturing apparatus (100) including a nozzle for extruding a heated resin sheet, (110) a main roll (130) including a surface portion with a microstructure formed therein, and a follower roll (140) disposed at a distance from the main roll, the sheet being pressed between the main roll (130) and the follower roll to transfer the microstructure to the sheet, the apparatus comprising:
    a conductive portion (131a) in the surface portion; and a power supply mechanism (150) that supplies power to the conductive portion (131a) from opposite ends of the main roll in order to make the conductive portion generate heat.
     
    2. The sheet manufacturing apparatus according to claim 1, wherein the power supply mechanism includes a pair of terminal portions that are in contact with the conductive portion at the opposite ends of the main roll, respectively, and a power source that supplies power to the conductive portion via the pair of terminal portions.
     
    3. The sheet manufacturing apparatus according to claim 2, wherein the terminal portions each include a looped conductive belt that is in contact with the conductive portion, a roll-side pulley that presses the conductive belt against the conductive portion, and a tension pulley that maintains tension of the conductive belt.
     
    4. The sheet manufacturing apparatus according to claim 2, wherein the terminal portions include a pair of conductive brushes or conductive pulleys that are in contact with the conductive portion at the opposite ends of the main roll, respectively, and a power source that supplies power to the conductive portion via the pair of conductive brushes or conductive pulleys.
     
    5. The sheet manufacturing apparatus according to any one of claims 1 to 4, wherein the conductive portion is a conductive sleeve.
     
    6. The sheet manufacturing apparatus according to any one of claims 1 to 4, wherein the conductive portion is a plating layer.
     
    7. The sheet manufacturing apparatus according to any one of claims 1 to 6, wherein a part of the conductive portion, parallel to a rotation axis direction of the main roll, generates heat using the power supply mechanism.
     
    8. A sheet manufacturing method for shaping a resin sheet (110) using a main roll (130) including a surface portion with a microstructure formed therein, and a follower roll (140) disposed at a distance from the main roll, the method comprising the steps of:

    extruding the heated sheet from a nozzle;

    supplying power to a conductive portion (131a) of the surface portion from opposite ends of the main roll via a power supply mechanism (150);

    making the conductive portion (131a) generate heat using the power supplied by the power supply mechanism; (150) and

    pressing the resin sheet (110) between the main roll (130) and the follower roll (140) in a state in which the conductive portion (131a) generates heat, thereby transferring the microstructure to the resin sheet (110).


     
    9. The sheet manufacturing method according to claim 8, wherein the power supply mechanism includes a pair of terminal portions that are in contact with the conductive portion at the opposite ends of the main roll, respectively, and a power source that supplies power to the conductive portion via the pair of terminal portions.
     
    10. The sheet manufacturing method according to claim 9, wherein the terminal portions each include a looped conductive belt that is in contact with the conductive portion, a roll-side pulley that presses the conductive belt against the conductive portion, and a tension pulley that maintains tension of the conductive belt.
     
    11. The sheet manufacturing apparatus according to claim 9, wherein the terminal portions include a pair of conductive brushes or conductive pulleys that are in contact with the conductive portion at the opposite ends of the main roll, respectively, and a power source that supplies power to the conductive portion via the pair of conductive brushes or conductive pulleys.
     
    12. The sheet manufacturing method according to any one of claims 8 to 11, wherein the conductive portion is a conductive sleeve.
     
    13. The sheet manufacturing method according to any one of claims 8 to 11, wherein the conductive portion is a plating layer.
     
    14. The sheet manufacturing method according to any one of claims 8 to 13, wherein the step of making the conductive portion generate heat includes making a part of the conductive portion, the part being parallel to a rotational axis direction of the main roll, generate heat.
     
    15. The sheet manufacturing method according to any one of claims 8 to 14, wherein the step of making the conductive portion generate heat includes making the conductive portion of the main roll generate heat on a side on which the sheet is guided between the main roll and the follower roll.
     


    Ansprüche

    1. Folienherstellungsvorrichtung (100), die eine Düse zum Extrudieren einer erhitzten Harzfolie (110), eine Hauptwalze (130), die einen Oberflächenabschnitt mit einer darin ausgebildeten Mikrostruktur einschließt, und eine Nachlaufwalze (140) einschließt, die in einem Abstand von der Hauptwalze angeordnet ist, wobei die Folie zwischen der Hauptwalze (130) und der Nachlaufwalze gepresst wird, um die Mikrostruktur auf die Folie zu übertragen, wobei die Vorrichtung umfasst:

    einen leitenden Abschnitt (131a) in dem Oberflächenabschnitt, und

    einen Stromversorgungsmechanismus (150), der den leitenden Abschnitt (131a) von gegenüberliegenden Enden der Hauptwalze mit Strom versorgt, um zu erreichen, dass der leitende Abschnitt Hitze erzeugt.


     
    2. Folienherstellungsvorrichtung nach Anspruch 1, wobei der Stromversorgungsmechanismus ein Paar von Anschlussabschnitten, die jeweils mit dem leitenden Abschnitt an den gegenüberliegenden Enden der Hauptwalze in Kontakt stehen, und eine Stromquelle einschließt, die den leitenden Abschnitt über das Paar von Anschlussabschnitten mit Strom versorgt.
     
    3. Folienherstellungsvorrichtung nach Anspruch 2, wobei die Anschlussabschnitte jeweils ein leitendes Schlaufenband, das mit dem leitenden Abschnitt in Kontakt steht, eine walzenseitige Rolle, die das leitende Band gegen den leitenden Abschnitt drückt, und eine Spannrolle, die eine Spannung des leitenden Bandes aufrechterhält, einschließen.
     
    4. Folienherstellungsvorrichtung nach Anspruch 2, wobei die Anschlussabschnitte ein Paar von leitenden Bürsten oder leitenden Rollen, die jeweils mit dem leitenden Abschnitt an gegenüberliegenden Enden der Hauptwalze in Kontakt stehen, und eine Stromquelle, die den leitenden Abschnitt über das Paar von leitenden Bürsten oder leitenden Rollen mit Strom versorgt, einschließen.
     
    5. Folienherstellungsvorrichtung nach einem der Ansprüche 1 bis 4, wobei der leitende Abschnitt eine leitende Hülse ist.
     
    6. Folienherstellungsvorrichtung nach einem der Ansprüche 1 bis 4, wobei der leitende Abschnitt eine Plattierungsschicht ist.
     
    7. Folienherstellungsvorrichtung nach einem der Ansprüche 1 bis 6, wobei ein Teil des leitenden Abschnitts parallel zu einer Drehachsenrichtung der Hauptwalze unter Verwendung des Stromversorgungsmechanismus Hitze erzeugt.
     
    8. Folienherstellungsverfahren zum Formen einer Harzfolie (110) unter Verwendung einer Hauptwalze (130), die einen Oberflächenabschnitt mit einer darin ausgebildeten Mikrostruktur einschließt, und einer Nachlaufwalze (140), die in einem Abstand von der Hauptwalze angeordnet ist, das Verfahren umfassend die Schritte von:

    Extrudieren der erhitzten Folie aus einer Düse;

    mit Strom versorgen eines leitenden Abschnitts (131a) des Oberflächenabschnitts von gegenüberliegenden Enden der Hauptwalze über einen Stromversorgungsmechanismus (150);

    Erreichen, dass der leitende Abschnitt (131a) unter Verwendung des von dem Stromversorgungsmechanismus (150) gelieferten Stromes Hitze erzeugt; und

    Pressen der Harzfolie (110) zwischen der Hauptwalze (130) und der Nachlaufwalze (140) in einem Zustand, in dem der leitende Abschnitt (131a) Hitze erzeugt, wodurch die Mikrostruktur auf die Harzfolie (110) übertragen wird.


     
    9. Folienherstellungsverfahren nach Anspruch 8, wobei der Stromversorgungsmechanismus ein Paar von Anschlussabschnitten, die jeweils mit dem leitenden Abschnitt an den gegenüberliegenden Enden der Hauptwalze in Kontakt stehen, und eine Stromquelle einschließt, die den leitenden Abschnitt über das Paar von Anschlussabschnitten mit Strom versorgt.
     
    10. Folienherstellungsverfahren nach Anspruch 9, wobei die Anschlussabschnitte jeweils ein leitendes Schlaufenband, das mit dem leitenden Abschnitt in Kontakt steht, eine walzenseitige Rolle, die das leitende Band gegen den leitenden Abschnitt drückt, und eine Spannrolle, die eine Spannung des leitenden Bandes aufrechterhält, einschließen.
     
    11. Folienherstellungsvorrichtung nach Anspruch 9, wobei die Anschlussabschnitte ein Paar von leitenden Bürsten oder leitenden Rollen, die mit dem leitenden Abschnitt an gegenüberliegenden Enden der Hauptwalze in Kontakt stehen, und eine Stromquelle, die den leitenden Abschnitt über das Paar von leitenden Bürsten oder leitenden Rollen mit Strom versorgt, einschließen.
     
    12. Folienherstellungsverfahren nach einem der Ansprüche 8 bis 11, wobei der leitende Abschnitt eine leitende Hülse ist.
     
    13. Folienherstellungsverfahren nach einem der Ansprüche 8 bis 11, wobei der leitende Abschnitt eine Plattierungsschicht ist.
     
    14. Folienherstellungsverfahren nach einem der Ansprüche 8 bis 13, wobei der Schritt vom Erreichen, dass der leitende Abschnitt Hitze erzeugt, das Erreichen einschließt, dass ein Teil des leitenden Abschnitts, wobei der Teil parallel zu einer Drehachsenrichtung der Hauptwalze ist, Hitze erzeugt.
     
    15. Folienherstellungsverfahren nach einem der Ansprüche 8 bis 14, wobei der Schritt vom Erreichen, dass der leitende Abschnitt Hitze erzeugt, das Erreichen einschließt, dass der leitende Abschnitt der Hauptwalze auf einer Seite, auf der die Folie zwischen der Hauptwalze und der Nachlaufwalze geführt ist, Hitze erzeugt.
     


    Revendications

    1. Appareil de fabrication de feuille (100) incluant une buse pour extruder une feuille de résine chauffée (110), un rouleau principal (130) incluant une portion de surface avec une microstructure formée dans celle-ci, et un rouleau suiveur (140) disposé à une distance du rouleau principal, la feuille étant pressée entre le rouleau principal (130) et le rouleau suiveur pour transférer la microstructure sur la feuille, l'appareil comprenant :
    une portion conductrice (131a) dans la portion de surface ; et un mécanisme d'alimentation en énergie (150) qui apporte de l'énergie à la portion conductrice (131a) depuis des extrémités opposées du rouleau principal afin que la portion conductrice génère de la chaleur.
     
    2. Appareil de fabrication de feuille selon la revendication 1, dans lequel le mécanisme d'alimentation en énergie inclut une paire de portions bornes qui sont en contact avec la portion conductrice au niveau des extrémités opposées du rouleau principal, respectivement, et une source d'énergie qui apporte de l'énergie à la portion conductrice via la paire de portions bornes.
     
    3. Appareil de fabrication de feuille selon la revendication 2, dans lequel les portions bornes incluent chacune une courroie conductrice en boucle qui est en contact avec la portion conductrice, une poulie côté rouleau qui presse la courroie conductrice contre la portion conductrice et une poulie de tension qui maintient la tension de la courroie conductrice.
     
    4. Appareil de fabrication de feuille selon la revendication 2, dans lequel les portions bornes incluent une paire de brosses conductrices ou poulies conductrices qui sont en contact avec la portion conductrice au niveau des extrémités opposées du rouleau principal, respectivement, et une source d'énergie qui apporte de l'énergie à la portion conductrice via la paire de brosses conductrices ou poulies conductrices.
     
    5. Appareil de fabrication de feuille selon l'une quelconque des revendications 1 à 4, dans lequel la portion conductrice est un manchon conducteur.
     
    6. Appareil de fabrication de feuille selon l'une quelconque des revendications 1 à 4, dans lequel la portion conductrice est une couche de placage.
     
    7. Appareil de fabrication de feuille selon l'une quelconque des revendications 1 à 6, dans lequel une partie de la portion conductrice, parallèle à une direction d'axe de rotation du rouleau principal, génère de la chaleur en utilisant le mécanisme d'alimentation en énergie.
     
    8. Procédé de fabrication de feuille pour façonner une feuille de résine (110) en utilisant un rouleau principal (130) incluant une portion de surface avec une microstructure formée dans celle-ci, et un rouleau suiveur (140) disposé à une distance du rouleau principal, le procédé comprenant les étapes consistant à :

    extruder la feuille chauffée à partir d'une buse ;

    apporter de l'énergie à une portion conductrice (131a) de la portion de surface depuis des extrémités opposées du rouleau principal via un mécanisme d'alimentation en énergie (150) ;

    amener la portion conductrice (131a) à générer de la chaleur en utilisant l'énergie apportée par le mécanisme d'alimentation en énergie (150) ; et

    presser la feuille de résine (110) entre le rouleau principal (130) et le rouleau suiveur (140) dans un état dans lequel la portion conductrice (131a) génère de la chaleur, transférant ainsi la microstructure sur la feuille de résine (110).


     
    9. Procédé de fabrication de feuille selon la revendication 8, dans lequel le mécanisme d'alimentation en énergie inclut une paire de portions bornes qui sont en contact avec la portion conductrice au niveau des extrémités opposées du rouleau principal, respectivement, et une source d'énergie qui apporte de l'énergie à la portion conductrice via la paire de portions bornes.
     
    10. Procédé de fabrication de feuille selon la revendication 9, dans lequel les portions bornes incluent chacune une courroie conductrice en boucle qui est en contact avec la portion conductrice, une poulie côté rouleau qui presse la courroie conductrice contre la portion conductrice et une poulie de tension qui maintient la tension de la courroie conductrice.
     
    11. Procédé de fabrication de feuille selon la revendication 9, dans lequel les portions bornes incluent une paire de brosses conductrices ou poulies conductrices qui sont en contact avec la portion conductrice au niveau des extrémités opposées du rouleau principal, respectivement, et une source d'énergie qui apporte de l'énergie à la portion conductrice via la paire de brosses conductrices ou poulies conductrices.
     
    12. Procédé de fabrication de feuille selon l'une quelconque des revendications 8 à 11, dans lequel la portion conductrice est un manchon conducteur.
     
    13. Procédé de fabrication de feuille selon l'une quelconque des revendications 8 à 11, dans lequel la portion conductrice est une couche de placage.
     
    14. Procédé de fabrication de feuille selon l'une quelconque des revendications 8 à 13, dans lequel l'étape consistant à amener la portion conductrice à générer de la chaleur inclut le fait d'amener une partie de la portion conductrice, la partie étant parallèle à une direction d'axe de rotation du rouleau principal, à générer de la chaleur.
     
    15. Procédé de fabrication de feuille selon l'une quelconque des revendications 8 à 14, dans lequel l'étape consistant à amener la portion conductrice à générer de la chaleur inclut amener la portion conductrice du rouleau principal à générer de la chaleur sur un côté sur lequel la feuille est guidée entre le rouleau principal et le rouleau suiveur.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description