CN115043579A - Method for producing glass film - Google Patents
Method for producing glass film Download PDFInfo
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- CN115043579A CN115043579A CN202210708041.0A CN202210708041A CN115043579A CN 115043579 A CN115043579 A CN 115043579A CN 202210708041 A CN202210708041 A CN 202210708041A CN 115043579 A CN115043579 A CN 115043579A
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- Prior art keywords
- glass film
- protective tape
- section
- bonding
- conveying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011521 glass Substances 0.000 title claims abstract description 195
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 230000001681 protective effect Effects 0.000 claims abstract description 86
- 230000037303 wrinkles Effects 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims description 32
- 238000005520 cutting process Methods 0.000 claims description 28
- 238000011144 upstream manufacturing Methods 0.000 claims description 12
- 238000003892 spreading Methods 0.000 claims description 4
- 238000010030 laminating Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 44
- 206010040954 Skin wrinkling Diseases 0.000 description 36
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000007667 floating Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000003280 down draw process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000006060 molten glass Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000007500 overflow downdraw method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000003405 preventing effect Effects 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 238000006124 Pilkington process Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/10—Mechanisms in which power is applied to web-roll spindle
- B65H18/103—Reel-to-reel type web winding and unwinding mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/34—Apparatus for taking-out curl from webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H39/00—Associating, collating, or gathering articles or webs
- B65H39/16—Associating two or more webs
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/037—Controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/08—Severing cooled glass by fusing, i.e. by melting through the glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/08—Severing cooled glass by fusing, i.e. by melting through the glass
- C03B33/082—Severing cooled glass by fusing, i.e. by melting through the glass using a focussed radiation beam, e.g. laser
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/142—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by travelling transporting tables
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/22—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands on a fluid support bed, e.g. on molten metal
- C03B35/24—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands on a fluid support bed, e.g. on molten metal on a gas support bed
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B40/00—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Optics & Photonics (AREA)
- Toxicology (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Surface Treatment Of Glass (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Packaging Frangible Articles (AREA)
- Joining Of Glass To Other Materials (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The present invention relates to a method for manufacturing a glass film, including: a step of bonding the protective tape (T) to the glass film (G) in the longitudinal direction by a bonding section (5) arranged on the conveyance path of the lateral conveyance section (3) while conveying the glass film (G) in the lateral direction by the lateral conveyance section (3); and a step of unfolding the wrinkles of the glass film (G) by a wrinkle unfolding unit (4) disposed on the transverse conveying unit (3) before the protective tape (T) is laminated to the glass film (G) by the laminating unit (5).
Description
The present application is a divisional application of an invention patent application having an application number of 201880041993.3, an application date of 2018, 7 and 9, and an invention name of "method for manufacturing glass film".
Technical Field
The present invention relates to a method for producing a glass film.
Background
As a method for producing a glass film, a down-draw method such as an overflow down-draw method, a slit down-draw method, a redraw method, or a float method is used. In these methods, a molten glass is used as a material, and after a glass film is formed and drawn by a forming section, the glass film is conveyed in a transverse direction by a transverse conveying section.
In addition, in some cases, after the glass film is drawn out from a supply roll around which the glass film is wound, the glass film is conveyed in the lateral direction by a lateral conveying unit.
In the transverse conveying section as described above, for example, a process related to production such as cutting of the glass film is performed (for example, see patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2013-014441
Disclosure of Invention
Problems to be solved by the invention
The glass film is a brittle material and is easily broken by impact or deformation. Therefore, the glass film is sometimes reinforced by bonding a protective tape to the glass film in the longitudinal direction.
However, since the glass film is thin and flexible, there is a problem that wrinkles are generated in the glass film during the conveyance in the lateral direction by the lateral conveyance unit. Such wrinkles form large ridges on the glass surface of the glass film. Therefore, if wrinkles are generated, the occurrence of a defective lamination of the protective tape may be caused.
The technical subject of the invention is to reliably restrain the poor joint of a protective tape caused by the wrinkles generated on a glass film conveyed along the transverse direction by a transverse conveying part.
Means for solving the problems
The present invention made to solve the above problems is a method for producing a glass film, comprising: a step of bonding the protective tape to the glass film along the longitudinal direction of the glass film by a bonding section disposed on a conveyance path of the lateral conveyance section while conveying the glass film in the lateral direction by the lateral conveyance section; and a step of unfolding the wrinkles of the glass film by a wrinkle unfolding portion arranged on the transverse conveying portion before the protective tape is laminated on the glass film by the laminating portion. According to this configuration, even if wrinkles occur in the glass film conveyed in the transverse direction by the transverse conveying unit, the wrinkles are unfolded by the wrinkle unfolding unit disposed in the transverse conveying unit before the protective tape is bonded to the glass film by the bonding unit. Therefore, since the wrinkles formed in the glass film are appropriately removed and then the protective tape is bonded to the glass film in the longitudinal direction by the bonding portion, the protective tape can be bonded accurately. Here, the "lateral direction" includes not only the horizontal direction but also a direction slightly inclined from the horizontal direction (the same applies hereinafter).
In the above-described configuration, it is preferable that the wrinkle developing section includes a rod-like body that is disposed upstream of a bonding position where the protective tape is bonded by the bonding section and extends in a direction intersecting a conveyance direction of the glass film, and that lifts the glass film from a lower surface side. When the wrinkles formed in the glass film are lifted from the lower surface side by the rod-shaped body, the wrinkles are unfolded by the lifting force. Therefore, irregular wrinkles having various directivities among wrinkles generated in the glass film are efficiently spread out in a wide range. Here, the "rod-shaped body" includes not only a solid rod-shaped body but also a hollow (tubular) rod-shaped body (the same applies hereinafter).
In the above-described configuration, it is preferable that the wrinkle development section includes a support body which is disposed over the entire range from the upstream side to the downstream side of the bonding position where the protective tape is bonded by the bonding section, supports the glass film from the lower surface side, and projects and floats both ends in the width direction of the glass film from both ends in the width direction of the support body. Thus, a tensile force acts on the glass film toward both ends in the width direction due to the weight of the portion protruding from the support. Therefore, the wrinkles generated in the glass film, particularly in the conveying direction, are effectively spread out. In addition, the thickness of both ends in the width direction of the glass film may be larger than that of the central portion in the width direction. In this case, if both width-direction end portions and the width-direction central portion are supported on the same plane, the glass film deforms following the plane. In this process, complicated deformation due to a difference in thickness between the widthwise opposite end portions and the widthwise central portion occurs in the glass film, and wrinkles are likely to occur in the glass film. Therefore, as described above, it is preferable that the both ends in the width direction are protruded to the outside of the support body and are floated, thereby preventing the occurrence of wrinkles due to a difference in thickness between the center portion in the width direction and the both ends in the width direction. In the above configuration, the support is disposed over the entire range from the upstream side to the downstream side of the bonding position, and therefore the wrinkle preventing effect of the support can be reliably maintained even at the bonding position.
In the above-described configuration, after the protective tape is bonded to the glass film by the bonding section, the glass film may be cut in the longitudinal direction by the cutting section disposed in the lateral conveying section. In this way, since the protective tape is already bonded to the glass film at the cutting position where the cutting section cuts the glass film, it is possible to reliably suppress breakage of the glass film at the time of cutting.
In this case, the glass film to which the protective tape is attached may be wound and collected by a winding roller after the glass film is cut by the cutting section. In this way, a glass roll obtained by winding the glass film with the protective tape can be manufactured.
Further, it is preferable that the joining section joins the protective tape to the upper surface of the glass film, and a winding roller is disposed on the lower surface side of the glass film, and the glass film is wound and collected so that the surface to which the protective tape is joined becomes the outer side. That is, in the case of a glass roll, since tensile stress acts on the outer side (outer peripheral surface side) of the glass film, damage progresses and breakage is likely to occur in the case where damage or the like occurs as compared with the inner side (inner peripheral surface side) of the glass film on which compressive stress acts. Therefore, from the viewpoint of preventing the glass film from being damaged, it is preferable to wind and collect the glass film so that the surface to which the protective tape is bonded becomes the outer side, and protect the outer peripheral surface side of the glass film with the protective tape.
In this case, it is preferable that the protective sheet supplied from the upper surface side of the glass film is wound around the winding roll before the glass film, and then the glass film and the protective sheet are wound around the winding roll in a state where the protective sheet is superposed on the surface of the glass film to which the protective tape is bonded. In this way, the glass film can be wound around the winding roll and collected while sandwiching the glass film between a part of the protective sheet previously wound around the winding roll and the remaining part of the protective sheet continuous thereto.
Effects of the invention
According to the present invention as described above, it is possible to reliably suppress a defective bonding of the protective tape due to wrinkles generated in the glass film conveyed in the transverse direction by the transverse conveying unit.
Drawings
Fig. 1 is a schematic side view showing the overall configuration of a glass film manufacturing apparatus used in a glass film manufacturing method.
Fig. 2 is an enlarged plan view showing a main part of the glass film manufacturing apparatus.
Fig. 3 is an enlarged longitudinal sectional view showing a main part of the glass film manufacturing apparatus.
Fig. 4 is an enlarged longitudinal sectional view showing a main part of the glass film manufacturing apparatus.
Fig. 5 is an enlarged longitudinal sectional view showing a main part of the glass roll.
Description of reference numerals:
1 forming section
2-direction changing part
3 lateral conveying part
4 fold expansion
5 bonding part
6 cutting part
7 winding roller
8 shaped body
9 guide roller
10 belt conveyor
11 floating device
12 conveying table
13 supply roller (for sheet material for transportation)
14 supply roll (for protective belt)
15 guide roller
16 pressing roller
17 supply roller (for protective sheet)
18 wand-like body
19 fixed plate
G glass film
Ga product part
Gb non-product section
Gx ear
R glass roll
S protective sheet
S1 sheet for conveyance
And T protective band.
Detailed Description
Hereinafter, an embodiment of the method for producing a glass film of the present invention will be described with reference to the drawings.
As shown in fig. 1 and 2, the apparatus for manufacturing a glass film used in the present manufacturing method includes: a forming section 1 for forming a glass film G; a direction changing unit 2 for changing the traveling direction of the glass film G from a vertical direction to a horizontal direction; a transverse conveying part 3 for conveying the glass film G along the transverse direction after the direction is changed; a wrinkle development unit 4 for flattening wrinkles generated in the glass film G conveyed in the transverse direction by the transverse conveyance unit 3; a bonding section 5 that bonds the protective tape T to the glass film G whose wrinkles have been flattened by the wrinkle development section 4; a cutting section 6 for cutting the non-product section Gb where the glass film G of the protective tape T is bonded by the bonding section 5; and a winding roller 7 for winding and collecting the product portion Ga obtained by cutting the glass film G from which the non-product portion Gb has been removed by the cutting portion 6.
In the present embodiment, the non-product portions Gb are formed at both ends of the glass film G in the width direction (direction orthogonal to the conveying direction). The non-product portion Gb may include a portion called an ear portion having a thickness larger than that of the product portion Ga. The thickness of the product Ga is preferably 300 μm or less, more preferably 200 μm or less, and further preferably 100 μm or less.
The forming section 1 performs an overflow downdraw method. In the forming section 1, the molten glass Gm is supplied to the forming body 8 having a wedge-shaped cross-sectional shape, and the molten glass Gm that overflows from the top of the forming body 8 to both sides is merged at the lower end portion thereof and flows down, whereby the sheet-like glass film G is continuously formed from the molten glass Gm.
The glass film G formed by the forming body 8 is slowly cooled (annealed) in the lower region of the forming body 8, and further cooled to near room temperature. During this time, the glass film G is guided downward while being sandwiched between a plurality of rollers (not shown) from the front and back sides.
A direction changing unit 2 is disposed below the forming unit 1. In the direction changing section 2, a plurality of guide rollers 9 as a guide member for guiding the glass film G to change its direction are arranged in a curved shape on the back side of the glass film G. These guide rollers 9 are in contact with the back surface of the glass film G.
Although not shown in the drawings, in the present embodiment, the guide roller 9 is divided into three portions, i.e., a width-direction center portion and two width-direction end portions. The glass film G is guided by the guide rollers 9 at the widthwise central portion and both widthwise end portions until the forming of the glass film G is stabilized, for example, immediately after the forming of the glass film G is started, and after the forming of the glass film G is stabilized, the guide rollers 9 at the widthwise central portion are retracted from the guide positions and the glass film G is guided only by the guide rollers 9 at both widthwise end portions.
The structure of the direction changing section 2 is not particularly limited as long as it can change the traveling direction of the glass film G, and for example, the glass film G may be guided over the entire width thereof by a roller, or a belt conveyor or a float device (fl) for ejecting gas may be used o ater), and the like.
The lateral conveying unit 3 is disposed forward (downstream) in the traveling direction of the direction changer 2. The lateral transfer unit 3 includes a belt conveyor 10, a floating device 11, and a transfer table 12, which are disposed at intervals in the transfer direction from the upstream side.
The belt conveyor 10 is a drive conveyor and supports the glass film G in contact therewith.
The float device 11 ejects gas or the like to the back surface side of the glass film G to support the glass film G in a non-contact manner. The float device 11 is configured to stop conveyance of the glass film G to the downstream side and to guide the glass film G having a defect to the lower side and discard the glass film G when a failure such as a breakage of the glass film G occurs on the upstream side of the float device 11. The floating device 11 may be omitted or a belt conveyor may be substituted.
The lateral conveying unit 3 is configured to convey the glass film G in the horizontal direction, but may be inclined within a range of less than 45 ° from the top and bottom of the horizontal direction (preferably, within a range of less than 30 °).
The wrinkle extension portion 4 is disposed above the conveyance table 12 so as to be fixed. The conveyance sheet S1 is interposed between the wrinkle development part 4 and the glass film G. The lower surface of the conveying sheet S1 is slidable in the wrinkle deployment section 4, and the upper surface of the conveying sheet S1 serves as a conveying support surface for conveying and supporting the glass film G. Since the glass film G is conveyed by the movement of the conveying sheet S1, the conveying table 12 is a stationary table that does not directly apply a conveying force to the glass film G.
The conveying sheet S1 is drawn upward from the supply roller 13 disposed below the conveying table 12, passes between the wrinkle development part 4 and the glass film G at the upper part of the conveying table 12, and is fed downward from the downstream end of the wrinkle development part 4. At this time, the conveying sheet S1 is conveyed along a closed loop or open loop path by a driving unit (not shown). The conveying sheet S1 is preferably made of resin (particularly foamed resin).
Above the conveyance table 12, the bonding section 5 is disposed on the upstream side, and the cutting section 6 is disposed on the downstream side. The laminating section 5 includes a supply roller 14 around which the protective tape T is wound, one or more guide rollers 15 that guide the protective tape T drawn out from the supply roller 14, and a pressing roller 16 that presses the protective tape T guided by the guide rollers 15 against the glass film G.
The pressing roller 16 rotates in the arrow a direction (the direction along the conveying direction of the glass film G) in a state of contacting the upper surface of the conveyed glass film G with the protective tape T interposed therebetween (see fig. 3). Therefore, in the present embodiment, the contact position between the pressing roller 16 and the glass film G is the bonding position of the protective tape T.
The protective tape T has an ultraviolet-curable adhesive surface on the surface (lower surface) on the side in contact with the glass film G. The protective tape T is adhered to the glass film G by irradiating the adhesive surface of the protective tape T with ultraviolet rays from an ultraviolet irradiation device (not shown). The adhesive used for the adhesive surface of the protective tape T is not limited to the ultraviolet curing type, and other types of adhesives such as a heat curing type and a pressure sensitive type may be used. Further, an adhesive such as an acrylic adhesive may be used. The sheet-like base material holding the adhesive surface of the protective tape T is preferably made of resin.
In the present embodiment, as shown in fig. 3, the protective tape T is bonded to both widthwise end portions of the product portion Ga in the conveying direction (the longitudinal direction of the glass film G).
The protective tape T is attached to a position slightly inside both ends in the width direction of the product portion Ga so as not to interfere with the cutting process by the cutting portion 6, and is not attached to a cutting line a formed at the boundary between the product portion Ga and the non-product portion Gb. The bonding region of the protective tape T on the glass film G is not particularly limited. The protective tape T may be attached to, for example, the widthwise central portion of the product portion Ga, or may be attached to the entire width of the glass film G.
The cutting section 6 cuts the non-product portion Gb of the glass film G in the conveying direction by bending stress cutting, thermal stress cutting (for example, laser cutting), fusing (for example, laser fusing), or the like. The cut non-product portions Gb are separated from the product portions Ga in the vertical and/or width direction (left and right) and then discarded. Fig. 1 illustrates a case where the non-product portion Gb is conveyed obliquely downward with respect to the forward direction in the conveying direction and discarded.
A take-up roll 7 is disposed downstream of the lateral conveying section 3. The winding roller 7 winds and collects the product portion Ga to which the protective tape T is bonded at both widthwise end portions.
The winding roller 7 is disposed on the lower surface side of the product portion Ga, and winds and collects the product portion Ga such that the surface to which the protective tape T is bonded is the outer side. A supply roller 17 around which the protective sheet S is wound is disposed above the winding roller 7, and the protective sheet S drawn out from the supply roller 17 is wound around the winding roller 7 together with the product portion Ga with the protective tape T superimposed thereon. The protective sheet S is preferably made of resin such as a polyethylene terephthalate film (PET film).
When the winding and collection of the glass film G are started, the protective sheet S is wound around the winding roller 7 prior to the glass film G. Preferably, the leading end portion (winding start side) of the protective sheet S is wound around the winding roller 7 more than once before the leading end portion of the glass film G that is positioned above the leading end portion (winding start side) of the protective sheet S and wound around the winding roller 7. This allows the product portion Ga to be wound around the winding roller 7 and collected while sandwiching the product portion Ga between a part of the protective sheet S previously wound around the winding roller 7 and the remaining part of the protective sheet S continuous therewith. At this time, the product portion Ga can be wound up while being pressed against the winding roller 7 side by the protective sheet S without applying excessive tension to the product portion Ga. That is, the tension acting on the product portion Ga can be made smaller than the tension acting on the protective sheet S at the time of winding and collection. Immediately before reaching the winding roller 7, the tension acting on the product portion Ga may be substantially zero by loosening the product portion Ga so that the product portion Ga moves on the concave curved track.
As shown in fig. 2, the wrinkle deployment section 4 includes: a rod-like body 18 which is disposed upstream of a bonding position (position corresponding to the pressing roller 16) where the protective tape T of the bonding section 5 is bonded to the glass film G and extends in a direction intersecting the conveying direction; and a fixed plate 19 which is disposed over the entire range from the upstream side to the downstream side of the bonding position and has a rectangular shape in plan view. The fixed plate 19 is a support for supporting the glass film G from below over the entire region from the upstream side to the downstream side of the bonding position.
Both widthwise ends of the conveying sheet S1 protrude from both widthwise ends of the glass film G, and both widthwise ends of the conveying table 12 protrude from both widthwise ends of the conveying sheet S1.
In the example of fig. 2, both ends in the width direction of the glass film G extend from both ends in the length direction of the rod-shaped body 18, but both ends in the length direction of the rod-shaped body 18 may extend from both ends in the width direction of the glass film G. In the illustrated example of the figure, both widthwise ends of the conveying sheet S1 protrude from both widthwise ends of the glass film G, but the both widthwise ends of the glass film G may protrude from both widthwise ends of the conveying sheet S1 in the opposite direction.
As shown in fig. 3, the rod-shaped body 18 is disposed at the upstream end of the conveyance table 12 such that the longitudinal direction thereof is parallel to the width direction of the conveyance table 12. The rod-like body 18 is fixed so as not to be rotatable. The rod-like body 18 has a circular cross section perpendicular to the longitudinal direction.
The cross-sectional shape of the rod-like body 18 is not limited to a circular shape, and may be, for example, an oval shape or a polygonal shape, and the lower surface portion may be a flat surface. That is, the cross-sectional shape of the rod-like body 18 may be convex at least on the surface (upper surface) that contacts the lower surface side of the glass film G. The rod-like body 18 may be configured to rotate in the direction of the arrow b (the direction along the conveyance direction of the glass film G). The wand 18 may also be slightly inclined with respect to the width direction.
The upper end of the rod-like body 18 is positioned higher than the upper end of the fixed plate 19. The height difference h between the two 18 and 19 is preferably 1mm to 10mm, more preferably 1 to 3mm (2 mm in the present embodiment). The rod-shaped body 18 and the stationary plate 19 are separated from each other in a state of being close to each other in the conveying direction, but may be in contact with each other.
As shown in fig. 4, the fixed plate 19 is fixed to, for example, an upper surface portion of the conveyance base 12, and an upper surface thereof is flat. The product portion Ga of the glass film G is supported from below by the upper surface of the fixed plate 19 via the conveying sheet S1. The ear portions Gx included in the non-product portion Gb of the glass film G are protruded from both ends in the width direction of the upper surface of the fixed plate 19 and float.
The upper surface of the stationary plate 19 is not limited to be flat, and may be gently curved so that the center portion in the width direction is higher than both end portions in the width direction. The stationary plate 19 may be omitted and the conveyance table 12 may be used as a support. When the stationary plate 19 is omitted, it is preferable that the product portion Ga of the glass film G is supported from below by the upper surface of the conveyance stage 12 via the conveyance sheet S1, and that the ear portions Gx included in the non-product portion Gb of the glass film G are in a state of protruding and floating from both ends in the width direction of the upper surface of the conveyance stage 12.
When the manufacturing method of the glass film is performed by the manufacturing apparatus having the above-described configuration, the glass film G that has passed through the direction changing unit 2 from the forming unit 1 shown in fig. 1 to the lateral conveying unit 3 is thin and flexible, and therefore wrinkles may occur in a wide range while being conveyed in the lateral direction by the belt conveyor 10 and the floating device 11.
However, these wrinkles are appropriately spread by the wrinkle spreading section 4 disposed on the conveyance table 12. Therefore, the wrinkles disappear to such an extent that no obstacle is generated at the bonding position where the bonding is performed by the bonding section 5 and the cutting position where the cutting is performed by the cutting section 6 on the downstream side. Therefore, the protective tape T can be accurately bonded to the glass film G by the bonding portion 5, and the glass film G can be accurately cut by the cutting portion 6.
The product portion Ga of the cut glass film G reaches the winding roll 7 with wrinkles removed. As a result, as shown in fig. 5, a glass roll R can be manufactured, which is wound around the winding roll 7 serving as a winding core in a state where the glass film G and the protective sheet S are superposed on each other. The protective tape T is bonded to both widthwise ends of the product portion Ga included in the glass roll R. In this state, the product portion Ga and the protective sheet S, and the protective sheet S and the protective tape T are not bonded to each other.
Here, the manufactured glass roll may be transported to a processing plant. In a processing factory, for example, the product portion Ga is drawn out from the glass roll, and an electrode or the like is formed in the center portion in the width direction of the product portion Ga to which the protective tape T is not bonded. The protective tape T attached to both ends in the width direction of the product portion Ga is peeled off from the product portion Ga or cut and removed together with the glass after the formation of the electrodes and the like is completed.
The present invention is not limited to the configuration of the above-described embodiment, and is not limited to the above-described operational effects. The present invention can be variously modified within a scope not departing from the gist of the present invention.
In the above-described embodiment, the case where the cutting process is performed on the downstream side of the bonding position of the protective tape in the lateral transfer unit has been described, but the manufacturing-related process performed on the downstream side of the bonding position of the protective tape is not limited to the cutting process. In the manufacturing-related process, not only the cutting process, but also a process of directly applying a certain processing to the glass film, such as an edge face processing process and a film forming process such as printing, and a process of indirectly bringing the glass film close to a final product (a product in a state capable of being shipped) such as a cleaning process of the surface of the glass film are widely included.
In the above-described embodiment, the overflow down-draw method is used to form the glass film, but other down-draw methods such as the slit down-draw method and the redraw method may be used. Alternatively, a float method may be used in which the glass film is pulled out from a float bath (float bath) and conveyed by a lateral conveying unit.
In the above embodiment, the case where the glass film continuously formed by the forming section is supplied to the lateral conveying section has been described, but the glass film continuously drawn out from the supply roll (glass roll) on which the glass film is wound may be supplied to the lateral conveying section. In this case, as long as the glass film is wound and collected as in the above-described embodiment, the manufacturing process is performed in a Roll-to-Roll (Roll) manner.
In the above embodiment, the case where the product portion is wound and collected so that the surface to which the protective tape is bonded is the outer side (outer circumferential surface side) has been described, but the product portion may be wound and collected so that the surface to which the protective tape is bonded is the inner side (inner circumferential surface side).
In the above embodiment, the case of manufacturing a glass roll has been described, but a plate-shaped glass may be manufactured by cutting a glass film in the width direction by a predetermined length. The manufactured plurality of sheet-like glasses are packed in a state of being stacked on a tray in, for example, a vertical posture or a horizontal posture. In this case, it is preferable that a protective sheet is interposed between the plate-like glasses.
Claims (7)
1. A method for producing a glass film, characterized in that,
the method for manufacturing the glass film comprises the following steps:
a step of bonding a protective tape to the glass film along the longitudinal direction of the glass film by a bonding unit arranged on a conveyance path of a lateral conveyance unit while conveying the glass film in the lateral direction by the lateral conveyance unit; and
and a step of spreading wrinkles of the glass film by a wrinkle spreading section disposed in the lateral conveying section before the protective tape is bonded to the glass film by the bonding section.
2. The method for manufacturing a glass film according to claim 1,
the wrinkle developing section includes a rod-shaped body disposed upstream of a bonding position where the protective tape is bonded by the bonding section and extending in a direction intersecting a conveying direction of the glass film,
the rod-shaped body lifts the glass film from the lower surface side.
3. The method for producing a glass film according to claim 1 or 2,
the wrinkle-spreading section includes a support member that is disposed over the entire range from the upstream side to the downstream side of the bonding position where the protective tape is bonded by the bonding section, and supports the glass film from the lower surface side,
the both ends in the width direction of the glass film are protruded from both ends in the width direction of the support body to float.
4. The method for producing a glass film according to any one of claims 1 to 3,
after the protective tape is bonded to the glass film by the bonding section, the glass film is cut in the longitudinal direction by a cutting section disposed in the transverse conveying section.
5. The method for manufacturing a glass film according to claim 4,
after the glass film is cut by the cutting section, the glass film to which the protective tape is attached is wound and collected by a winding roller.
6. The method for manufacturing a glass film according to claim 5,
the bonding portion bonds the protective tape to the upper surface of the glass film, and
the winding roller is disposed on the lower surface side of the glass film, and the glass film is wound and collected so that the surface to which the protective tape is bonded is the outer side.
7. The method for manufacturing a glass film according to claim 6,
after the protective sheet supplied from the upper surface side of the glass film is wound around the winding roll before the glass film, the glass film and the protective sheet are wound around and collected by the winding roll in a state where the protective sheet is superposed on the surface of the glass film to which the protective tape is bonded.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-147831 | 2017-07-31 | ||
| JP2017147831A JP6839419B2 (en) | 2017-07-31 | 2017-07-31 | Glass film manufacturing method |
| CN201880041993.3A CN110785384B (en) | 2017-07-31 | 2018-07-09 | Method for producing glass film |
| PCT/JP2018/025912 WO2019026556A1 (en) | 2017-07-31 | 2018-07-09 | Method for producing glass film |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880041993.3A Division CN110785384B (en) | 2017-07-31 | 2018-07-09 | Method for producing glass film |
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| Publication Number | Publication Date |
|---|---|
| CN115043579A true CN115043579A (en) | 2022-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201880041993.3A Active CN110785384B (en) | 2017-07-31 | 2018-07-09 | Method for producing glass film |
| CN202210708041.0A Pending CN115043579A (en) | 2017-07-31 | 2018-07-09 | Method for producing glass film |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201880041993.3A Active CN110785384B (en) | 2017-07-31 | 2018-07-09 | Method for producing glass film |
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| Country | Link |
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| JP (1) | JP6839419B2 (en) |
| KR (1) | KR102475068B1 (en) |
| CN (2) | CN110785384B (en) |
| TW (1) | TWI805598B (en) |
| WO (1) | WO2019026556A1 (en) |
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| CN117480130A (en) * | 2021-05-10 | 2024-01-30 | 康宁公司 | Method and apparatus for manufacturing glass ribbon |
| WO2024097124A1 (en) * | 2022-11-03 | 2024-05-10 | Corning Incorporated | Methods and apparatus for manufacturing a glass ribbon |
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- 2017-07-31 JP JP2017147831A patent/JP6839419B2/en active Active
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2018
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- 2018-07-09 KR KR1020197027787A patent/KR102475068B1/en active IP Right Grant
- 2018-07-09 WO PCT/JP2018/025912 patent/WO2019026556A1/en active Application Filing
- 2018-07-09 CN CN202210708041.0A patent/CN115043579A/en active Pending
- 2018-07-20 TW TW107125048A patent/TWI805598B/en active
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2019026556A1 (en) | 2019-02-07 |
| JP6839419B2 (en) | 2021-03-10 |
| TW201910276A (en) | 2019-03-16 |
| KR102475068B1 (en) | 2022-12-07 |
| JP2019026510A (en) | 2019-02-21 |
| CN110785384A (en) | 2020-02-11 |
| KR20200035370A (en) | 2020-04-03 |
| CN110785384B (en) | 2022-06-14 |
| TWI805598B (en) | 2023-06-21 |
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