CN108535274B - Marking device, defect inspection system, and film manufacturing method - Google Patents

Marking device, defect inspection system, and film manufacturing method Download PDF

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Publication number
CN108535274B
CN108535274B CN201810170418.5A CN201810170418A CN108535274B CN 108535274 B CN108535274 B CN 108535274B CN 201810170418 A CN201810170418 A CN 201810170418A CN 108535274 B CN108535274 B CN 108535274B
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China
Prior art keywords
optical film
droplets
suction
ink
film
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CN201810170418.5A
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Chinese (zh)
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CN108535274A (en
Inventor
井村圭太
加集功士
越野哲史
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
    • G01N2021/8924—Dents; Relief flaws
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
    • G01N2021/8925—Inclusions

Abstract

The invention provides a marking device, a defect inspection system and a film manufacturing method, which can prevent droplets from attaching to areas other than a defective position of a film even if the droplets splash during the process from being ejected from an ejection hole to being sprayed on an optical film, thereby improving the yield of products. A marking device capable of marking information by ejecting a droplet on an optical film, the marking device comprising: a droplet ejection device having an ejection surface on which ejection holes for ejecting droplets onto the optical film are formed; and a suction device which is provided between the ejection surface and the optical film and can suck the splashed droplets which are ejected from the ejection hole and are sprayed onto the optical film.

Description

Marking device, defect inspection system, and film manufacturing method
Technical Field
The invention relates to a marking device, a defect inspection system and a film manufacturing method.
Background
For example, an optical film such as a polarizing film is wound around a core after defect inspection such as a foreign matter defect or a concave-convex defect. Information on the position and type of the defect (hereinafter referred to as "defect information") is printed on the end of the optical film in the width direction, and the information is recorded on the optical film by marking the defect position. The optical film wound around the core member is separated from the optical film on the upstream side when the amount of winding reaches a certain amount, and shipped as a take-up roll. In addition, the optical film is cut out in accordance with the marking performed at the defective position, and a single article (product) is taken out.
For example, patent document 1 discloses a defect labeling device capable of applying a mark for labeling to clearly indicate a portion of a detected defect while detecting a local defect of a sheet-like product having a constant width and being conveyed in a longitudinal direction perpendicular to the width direction. On the other hand, patent document 2 exemplifies a non-contact printing method such as ink jet as a marking method.
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2002-303580
Patent document 2: japanese patent laid-open publication No. 2011-102985
The present applicant has also developed a marking device capable of marking information by ejecting a droplet on an optical film. The marking device includes a droplet ejection device having an ejection surface on which ejection holes for ejecting droplets to the optical film are formed. Through the research of the inventor, the following results are obtained: in such a marking device, in addition to the characteristics such as the size and viscosity of the liquid droplets discharged from the discharge hole, droplets are splashed during the process from the discharge hole to the landing of the liquid droplets on the optical film due to the printing target of the discharged liquid droplets, the conveying speed of the optical film, and the like. If the splashed droplets adhere to a region other than the defective position of the optical film, the portion that should be originally taken out as a product may be contaminated with the droplets, and the contaminated portion has to be discarded as a defective product, which may reduce the yield of the product.
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made in view of the above circumstances, and provides a marking device, a defect inspection system, and a film manufacturing method that can suppress adhesion of droplets to regions other than defective positions of a film and improve product yield even when droplets are splashed during the period from when the droplets are ejected from an ejection hole to when the droplets are landed on an optical film.
Means for solving the problems
In order to achieve the above object, the present invention adopts the following aspects.
(1) A marking device according to 1 aspect of the present invention is a marking device capable of marking information by ejecting a droplet on an optical film, the marking device including: a droplet discharge device having a discharge surface on which discharge holes for discharging the droplets toward the optical film are formed; and a suction device that is provided between the emission surface and the optical film and that can suck the spray splashed in a process from when the liquid droplets are emitted from the emission hole to when the liquid droplets fall onto the optical film.
(2) In the marking device described in (1) above, the droplets may include at least one of a first droplet that splashes when the droplets are ejected from the ejection holes and a second droplet that splashes when the droplets land on the optical film.
(3) In the marking device described in (1) or (2), the suction device may include at least one of a first suction mechanism disposed on one side with an emission passage through which the droplets are emitted and a second suction mechanism disposed on the other side with the emission passage therebetween.
(4) In the marking device described in (3) above, the injection passage may be along a direction intersecting with a vertical direction, the first suction means may be disposed above the injection passage in the vertical direction, and the second suction means may be disposed below the injection passage in the vertical direction.
(5) In the marking device described in (4) above, the suction device may be only the second suction means.
(6) In the marking device described in any one of (1) to (5), the marking device may further include a shielding member that is provided on the emission surface and that is capable of shielding the mist that splashes when the droplets are emitted from the emission hole, wherein the shielding member is provided with an opening that opens at a position facing the emission hole and that has an inner wall surface that shields the mist that splashes in a direction intersecting a normal line of the emission surface.
(7) In the marking device described in (6) above, the diameter of the opening may be larger than the diameter of the injection hole.
(8) In the marking device described in (6) or (7), a tapered portion having an inclined surface facing the injection hole may be formed at an edge portion of the opening portion on the injection surface side.
(9) In the marking device described in any one of (1) to (8), the marking device may further include a splash-restraining member that is provided between the emission surface and the optical film and that is capable of restraining the spray splashed during the process from the emission of the liquid droplets from the emission hole to the landing of the liquid droplets on the optical film, wherein the splash-restraining member is formed with a shielding surface extending in a direction intersecting a normal line of the emission surface.
(10) In the marking device described in (9) above, the spatter regulating member may be provided with a spatter regulating plate having a thickness in a direction parallel to a normal line of the emission surface.
(11) In the marking device described in (10) above, the splash guard may include at least one of a first splash guard disposed on one side with an emission passage through which the liquid droplets are emitted and a second splash guard disposed on the other side with the emission passage therebetween.
(12) In the marking device described in (11) above, the injection passage may be along a direction intersecting with a vertical direction, the first splash regulating plate may be disposed above the injection passage in the vertical direction, and the second splash regulating plate may be disposed below the injection passage in the vertical direction.
(13) In the marking device described in (11) or (12) above, the first splash guard may have a first shielding surface extending in a direction intersecting a normal line of the emission surface, and the second splash guard may have a second shielding surface extending parallel to the first shielding surface.
(14) In the marking device described in any one of (11) to (13) above, an interval between the first and second splash guard plates may be larger than a diameter of the injection hole.
(15) In the marking device described in (12) above, the splash guard may be only the second splash guard.
(16) In the marking device described in any one of (1) to (15), the droplet ejection device may be configured to eject the droplets from a side of the optical film opposite to a position where the droplet ejection device contacts the guide roller while the long strip-shaped optical film is being conveyed, the guide roller contacting the optical film with the optical film interposed therebetween.
(17) A defect inspection system according to 1 aspect of the present invention includes: a conveying line for conveying the long strip-shaped film; a defect inspection device that inspects defects of the film conveyed by the conveying line; and the marking device described in any one of (1) to (16) above, which is capable of marking information by ejecting a droplet to a position of a defect based on a result of the defect inspection.
(18) In the defect inspection system described in (17) above, the marking device may eject the liquid droplets from a direction intersecting a vertical direction to the film conveyed by the conveying line in a direction parallel to the vertical direction.
(19) In the defect inspection system described in (17) above, the marking device may emit the liquid droplets from below to the film conveyed by the conveying line in a direction intersecting with a vertical direction.
(20) In the defect inspection system described in any one of (17) to (19), the defect inspection system may further include a guide roller that contacts the film, and the marking device may be disposed opposite the guide roller with the film interposed therebetween, and may eject the liquid droplet from a side of the film opposite to a position where the marking device contacts the guide roller.
(21) In the defect inspection system described in (20) above, the film may be stretched on the outer peripheral surface of the guide roller within an angle range of 40 ° to 130 °.
(22) A film production apparatus according to 1 aspect of the present invention includes the defect inspection system described in any one of (17) to (21) above.
(23) A film manufacturing method according to 1 aspect of the present invention includes a step of labeling using the defect inspection system described in any one of (17) to (21).
Effects of the invention
According to the present invention, it is possible to provide a marking device, a defect inspection system, and a film manufacturing method that can suppress adhesion of droplets to regions other than a defective position of a film and improve product yield even when droplets are splashed during a period from when the droplets are ejected from an ejection hole to when the droplets are landed on an optical film.
Drawings
Fig. 1 is a plan view showing an example of a liquid crystal display panel.
Fig. 2 is a sectional view II-II of fig. 1.
Fig. 3 is a cross-sectional view showing an example of the optical film.
Fig. 4 is a side view showing the structure of the film production apparatus according to the first embodiment.
Fig. 5 is a perspective view showing a production process.
Fig. 6 is a perspective view showing the liquid droplet ejection device, the shielding plate, and the fixing member in the marking device according to the first embodiment.
Fig. 7 is a front view showing the liquid droplet ejection device, the shielding plate, and the fixing member in the marking device according to the first embodiment.
Fig. 8 is a sectional view VIII-VIII of fig. 7.
Fig. 9 is an enlarged view of a main portion of fig. 8, and is a view for explaining an operation of the shielding plate according to the first embodiment.
Fig. 10 is a view showing a first modification of the fixing member, and is a sectional view corresponding to fig. 8.
Fig. 11 is a view showing a second modification of the fixing member, and is a sectional view corresponding to fig. 8.
Fig. 12 is a diagram showing a modification of the shutter member, and is a cross-sectional view corresponding to fig. 8.
Fig. 13 is a perspective view showing the marking device of the first embodiment.
Fig. 14 is a diagram for explaining an operation of the suction device in the marking device according to the first embodiment.
Fig. 15 is a perspective view showing a marking device according to a second embodiment.
Fig. 16 includes an enlarged view of a main portion of fig. 15, and is a view for explaining an operation of the splash regulating member in the marking device according to the second embodiment.
Fig. 17 is a diagram showing a labeling device according to a third embodiment, and is a diagram including a cross section corresponding to fig. 8.
Description of the reference numerals
1 … film manufacturing apparatus; 2 … defect inspection device; 4. 204, 304 … labeling the device; 4a … spray; 4b … spray; 7 … guide roller; 9 … carrying the line; 10. 310 … defect inspection system; 11 … defect; 12 … information; 20 … droplet ejection device; 20A … ejection head; 21 … shooting out a hole; 22 … exit face; 23 … side end of the droplet ejection device; 30. 130, 230, 330 … shutter member, shutter plate; 31. 131, 231, 331 … opening parts; 31a, 131a, 231a, 331a … inner wall surface; 32. 332 … first main surface (surface of the shielding plate on the side opposite to the emission surface); 33 … shielding the side end of the plate; 34 … shielding the outer edge of the panel; 40. 140, 340 … securing members; 41 … a first wall portion; 42 … second wall portion; 141. 341 … securing a sidewall portion of the member; 230 … a barrel member; 336 … a taper; 336a … inclined plane; d1 … diameter of the opening; d2 … diameter of the exit hole; F10X … optical film.
Detailed Description
(first embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
In this embodiment, a film production apparatus constituting a part of a production system of an optical display device and a film production method using the film production apparatus will be described.
The film manufacturing apparatus manufactures a film-shaped optical member (optical film) made of resin. Examples of the optical film include a polarizing film, a retardation film, and a brightness enhancement film. For example, the optical film is bonded to a panel-shaped optical display member (optical display panel) such as a liquid crystal display panel or an organic EL display panel. The film manufacturing apparatus constitutes a part of a production system for producing an optical display device including such an optical display unit, an optical member.
In this embodiment mode, a transmissive liquid crystal display device is exemplified as the optical display device. The transmissive liquid crystal display device includes a liquid crystal display panel and a backlight device. In this liquid crystal display device, an image can be displayed by making illumination light emitted from the backlight device enter from the back side of the liquid crystal display panel and making light modulated by the liquid crystal display panel exit from the front side of the liquid crystal display panel.
(optical display device)
First, as an optical display device, a structure of the liquid crystal display panel P shown in fig. 1 and 2 will be described. Fig. 1 is a plan view showing an example of the liquid crystal display panel P. Fig. 2 is a sectional view II-II of fig. 1. In fig. 2, hatching showing a cross section is not shown.
As shown in fig. 1 and 2, the liquid crystal display panel P includes: a first substrate P1, a second substrate P2 disposed opposite to the first substrate P1, and a liquid crystal layer P3 disposed between the first substrate P1 and the second substrate P2.
The first substrate P1 is formed of a transparent substrate having a rectangular shape in plan view. The second substrate P2 is a rectangular transparent substrate smaller than the first substrate P1. The liquid crystal layer P3 seals the periphery between the first substrate P1 and the second substrate P2 with a seal (not shown), and is disposed inside a rectangular region in plan view surrounded by the seal. In the liquid crystal display panel P, a region located inside the outer periphery of the liquid crystal layer P3 in a plan view is referred to as a display region P4, and a region surrounding the periphery of the display region P4 is referred to as a frame portion G.
A first optical film F11 as a polarizing film and a third optical film F13 as a brightness enhancement film overlapping the first optical film F11 are laminated in this order on the back surface (backlight side) of the liquid crystal display panel P. A second optical film F12 as a polarizing film is laminated on the surface (display surface side) of the liquid crystal display panel P. Hereinafter, a film including any one of the first, second, and third optical films F11, F12, and F13 may be collectively referred to as an optical film F1X.
(optical film)
Next, an example of the optical film F1X shown in fig. 3 will be described. Fig. 3 is a sectional view showing the structure of the optical sheet F1X. In fig. 3, hatching showing a cross section is not shown.
The optical film F1X can be obtained by cutting a sheet having a predetermined length from the long strip-shaped optical sheet FX shown in fig. 3. Specifically, the optical film F1X includes: a base sheet F4, an adhesive layer F5 provided on one surface (upper surface in fig. 3) of the base sheet F4, a separator sheet F6 provided on one surface of the base sheet F4 via the adhesive layer F5, and a surface protective sheet F7 provided on the other surface (lower surface in fig. 3) of the base sheet F4.
When the substrate sheet F4 is, for example, a polarizing film, the pair of protective films F4b and F4c sandwich the polarizing plate F4 a. The adhesive layer F5 adheres the base sheet F4 to the liquid crystal display panel P. The separator F6 protects the adhesive layer F5. The separator sheet F6 is peeled off from the adhesive layer F5 of the optical film F1X before the substrate sheet F4 is bonded to the liquid crystal display panel P via the adhesive layer F5. The portion of the optical film F1X from which the separator F6 was removed was used as a bonding sheet F8.
The surface protective sheet F7 protects the surface of the protective substrate sheet F4. The surface protective sheet F7 is peeled from the surface of the base sheet F4 after the base sheet F4 of the attachment sheet F8 is attached to the liquid crystal display panel P.
In addition, any one of the pair of protective films F4b and F4c may be omitted from the base sheet F4. For example, the protective film F4b on the side of the adhesive layer F5 may be omitted, and the adhesive layer F5 may be provided directly on the polarizing plate F4 a. The protective film F4c on the side of the surface protective sheet F7 may be subjected to surface treatment such as hard coat treatment for protecting the outermost surface of the liquid crystal display panel P and antiglare treatment for obtaining an antiglare effect. The substrate sheet F4 is not limited to the above-described laminated structure, and may have a single-layer structure. Further, the surface protective sheet F7 may be omitted.
(film production apparatus and film production method)
Next, the film production apparatus 1 shown in fig. 4 will be explained. Fig. 4 is a side view showing the structure of the film production apparatus 1 according to the first embodiment.
For example, the film manufacturing apparatus 1 manufactures the optical film F10X in which surface protection films are laminated on both surfaces of a polarizing film. The film manufacturing method includes a manufacturing process of the optical film F10X. For example, the film manufacturing method includes: a material roll manufacturing step of manufacturing a material roll (not shown) of a long strip-shaped polarizing film, a material roll R1 of manufacturing a long strip-shaped optical film F10X by bonding a long strip-shaped surface protective film to a long strip-shaped polarizing film, and a marking step of marking a defect position based on a result of defect inspection of the long strip-shaped optical film F10X. After the labeling step, a production step is performed in which the labeled portions are removed as defective products and the unlabeled portions are collected as non-defective products.
For example, in a roll manufacturing process, a film such as PVA (Polyvinyl Alcohol) which is a base material of a polarizing plate is subjected to dyeing, crosslinking, stretching, and the like, and then a protective film such as TAC (triacetyl cellulose) is attached to both surfaces of the film subjected to the dyeing, crosslinking, stretching, and the like, thereby manufacturing a long strip-shaped polarizing film, and the manufactured polarizing film is wound around a core member, thereby obtaining a roll (not shown).
In the laminating step, the long strip-shaped polarizing film and the long strip-shaped surface protective film are respectively wound from a long strip-shaped polarizing film winding roll and a long strip-shaped surface protective film winding roll (both not shown), and are sandwiched and laminated by a nip roll or the like, and are drawn out, thereby producing a long strip-shaped optical film F10X, and the produced optical film F10X is wound around a core material, thereby obtaining a winding roll R1. For example, as the surface protective film, PET (Polyethylene terephthalate) is used.
In the marking step, the ink 4i (liquid droplet) is ejected to the position of the defect based on the result of the defect inspection, and information is marked on the optical film F10X. Here, "ejection" means that the ink 4i is ejected from the ejection hole 21 shown in fig. 6, for example. In the marking step, a dot-like mark larger than the defect is printed (marked) at the defect position of the optical film F10X, and recording is performed directly at the defect position.
Fig. 5 is a perspective view showing a production process.
As shown in fig. 5, in the production step, a plurality of individual articles (products) are obtained from the long, strip-shaped optical film F10X. Dot-like marks 12 larger than the defect 11 are printed in the vicinity of the defect 11 in the optical film F10X. The region MA in the optical film F10X is a region in which a label (hereinafter referred to as a "full width label") is applied to the entire film width direction. For example, full-width labeling is performed when a plurality of defects are found in a predetermined region of the optical film F10X.
The production process includes a cutting process of cutting the optical film F10X based on the information given. In the cutting step, the optical film F10X is cut out based on the marked information, and the individual articles (products) are taken out. In the production process, the marked portion is removed as a defective product 13, and the unmarked portion is collected as a non-defective product 14.
As shown in fig. 4, the film production apparatus 1 includes a conveyance line 9. The conveyance line 9 forms a conveyance path for conveying the long belt-shaped optical film F10X wound from the winding roll R1. The optical film F10X is subjected to predetermined processing such as defect inspection and marking, and is wound around the core material as a take-up roll R2 after the predetermined processing in the winding section 8.
A pair of nip rollers 5a and 5b are disposed on the conveyance line 9. In addition, an accumulator (not shown) including a plurality of dancer rollers and the guide roller 7 (see fig. 17) may be disposed in the conveyance line 9.
The pair of nip rollers 5a, 5b nip the optical film F10X therebetween and rotate in opposite directions to each other, thereby drawing out the optical film F10X in a direction V1 of an arrow shown in fig. 4 (a conveying direction of the optical film F10X).
The accumulator (not shown) is for absorbing a difference due to a variation in the feeding amount of the optical film F10X and reducing a variation in the tension applied to the optical film F10X. For example, the accumulator has the following structure: in a predetermined section of the conveying line 9, a plurality of dancer rollers located on the upper side and a plurality of dancer rollers located on the lower side are alternately arranged.
In the accumulator, the upper dancer roller and the lower dancer roller are relatively moved up and down while the optical film F10X is conveyed in a state where the optical film F10X is hung on the upper dancer roller and the lower dancer roller in a different manner from each other. Thereby, the optical film F10X can be accumulated without stopping the conveyance line 9. For example, in the accumulator, accumulation of the optical film F10X can be increased by increasing the distance between the upper dancer roller and the lower dancer roller, and accumulation of the optical film F10X can be decreased by decreasing the distance between the upper dancer roller and the lower dancer roller. The accumulator is operated, for example, during a work such as coil bonding after replacing the core material of the coil rolls R1 and R2.
The guide roller 7 (see fig. 17) guides the optical film F10X drawn out by the pinch rollers 5a and 5b to the downstream side of the conveyance line 9 while rotating. The number of guide rollers 7 is not limited to 1, and a plurality of guide rollers may be arranged.
The optical film F10X is wound around the core material in the winding section 8 as a take-up roll R2 after predetermined processing, and then conveyed to the next step (see fig. 5).
(Defect inspection System)
Next, the defect inspection system 10 provided in the film manufacturing apparatus 1 will be described.
As shown in fig. 4, the defect inspection system 10 includes a conveyance line 9, a defect inspection apparatus 2, a defect information reading apparatus 3, a labeling apparatus 4, and a control apparatus 6.
The defect inspection apparatus 2 performs defect inspection of the optical film F10X. Specifically, the defect inspection apparatus 2 detects various defects such as a foreign substance defect, a concave-convex defect, and a bright point defect, which are generated when the optical film F10X is manufactured and when the optical film F10X is conveyed. The defect inspection apparatus 2 detects a defect of the optical film F10X by performing inspection processing such as reflection inspection, transmission inspection, oblique transmission inspection, cross nicol transmission inspection, and the like on the optical film F10X conveyed by the conveyance line 9.
For example, the defect inspection apparatus 2 includes a plurality of illuminating units (not shown) for irradiating the optical film F10X with illumination light and a plurality of light detecting units for detecting light transmitted through the optical film F10X (transmitted light) or light reflected by the optical film F10X (reflected light) at positions on the upstream side of the nip rollers 5a and 5b in the conveyance line 9.
When the defect inspection apparatus 2 is configured to detect transmitted light, a plurality of illumination sections and light detection sections arranged in the conveying direction of the optical film F10X are disposed facing each other with the optical film F10X interposed therebetween. The defect inspection apparatus 2 is not limited to the configuration for detecting transmitted light, and may be configured to detect reflected light or configured to detect transmitted light and reflected light. When the reflected light is detected, the light detection unit may be disposed on the illumination unit side.
The illumination unit irradiates the optical film F10X with illumination light whose light intensity, wavelength, polarization state, and the like are adjusted according to the type of defect inspection. The light detection unit uses an image pickup device such as a CCD to pick up an image of the position of the optical film F10X to which the illumination light is applied. The image (the result of the defect inspection) captured by the light detection unit is output to the control device 6.
The apparatus may further include a defect inspection device for inspecting defects in the long strip-shaped optical film and the long strip-shaped polarizing film before the long strip-shaped surface protective film is bonded thereto, and a recording device (not shown) for recording defect information based on a result of the defect inspection by the defect inspection device in the polarizing film. The defect inspection apparatus, not shown, has the same configuration as the defect inspection apparatus 2 described above, and detects a defect in the polarizing film.
The defect information recorded by the recording device (not shown) includes information relating to the position, type, and the like of the defect, and is recorded as an identification code such as a character, a barcode, a two-dimensional code (DataMatrix code, QR code (registered trademark), and the like), for example. The identification code includes, for example, information indicating how far apart the defect detected by a defect inspection apparatus (not shown) is from the position where the identification code is printed in the film width direction (information on the position of the defect). In addition, information related to the kind of the detected defect may be further included in the identification code.
The recording device is provided on the downstream side of the defect inspection device, not shown, in the transport line of the polarizing film. The recording apparatus includes, for example, a print head using an ink jet system. The print head discharges ink to the position of the edge portion (end portion) of the polarizing film in the width direction, thereby performing printing of the defect information.
The defect information reading device 3 is provided on the downstream side of the defect inspection device 2 in the conveyance line 9. The defect information reading device 3 reads the defect information recorded on the optical film F10X (the polarizing film). The defect information reading device 3 has a photographing device. The image pickup device uses an image pickup element such as a CCD to pick up the defect information of the conveyed optical film F10X.
The defect information reading device 3 reads defect information including information relating to the position, type, and the like of a defect, for example, recorded as an identification code such as a character, a barcode, a two-dimensional code (a DataMatrix code, a QR code (registered trademark), and the like). For example, by reading the defect information, it is possible to obtain information (information relating to the position of the defect) indicating how far apart the defect detected by the defect inspection apparatus 2 or the like exists in the film width direction from the position where the identification code is printed. In addition, when the identification code includes information on the type of the detected defect, the information on the type of the detected defect can be obtained by reading the defect information. The defect information (read result) obtained by the defect information reading device 3 is output to the control device 6.
The marking device 4 is provided on the downstream side of the defect information reading device 3 in the conveyance line 9. The marking device 4 emits the ink 4i to the position of the defect based on the result of the defect inspection, and marks information on the optical film F10X. The marking device 4 prints (marks) a dot-like mark larger than the defect on the defective position of the optical film F10X, thereby directly recording the mark on the defective position.
Note that the marking device 4 may print (mark) a dot-shaped, linear, or frame-shaped mark having a size including the defect, and directly record the mark at the defect position. In this case, in addition to the mark, a symbol or a pattern indicating the type of the defect may be printed at the defect position, thereby recording information on the type of the defect.
The defect inspection system 10 may include a length measuring device (not shown) for measuring the amount of the optical film F10X conveyed. For example, as the length measuring device, a rotary encoder angular position sensor may be disposed on the nip roller in the conveyance line 9. The length measuring device measures the amount of conveyance of the optical film F10X from the amount of rotational displacement of the nip roller that rotates in contact with the optical film F10X. The measurement result of the length gauge is output to the control device 6.
The control device 6 comprehensively controls each part of the film production apparatus 1. Specifically, the control device 6 includes a computer system as an electronic control device. The computer system includes an arithmetic processing unit such as a CPU, a memory, and an information storage unit such as a hard disk.
An Operating System (OS) for controlling the computer system, a program for causing the arithmetic processing unit to execute various processes on each unit of the film producing apparatus 1, and the like are recorded in the information storage unit of the control apparatus 6. The control device 6 may include a logic circuit such as an ASIC that executes various processes necessary for controlling the respective parts of the film manufacturing apparatus 1. The control device 6 includes an interface for inputting and outputting data between the computer system and an external device. An input device such as a keyboard or a mouse, a display device such as a liquid crystal display, a communication device, and the like can be connected to the interface.
The control device 6 analyzes the image captured by the light detection unit of the defect inspection apparatus to determine the presence (position), type, and the like of the defect. The control device 6 controls the recording device to record defect information in the polarizing film, in the case where it is determined that there is a defect in the polarizing film. The control device 6 controls the marking device 4 to print a mark on the optical film F10X when it is determined that the optical film F10X has a defect based on the inspection result of the defect inspection device, the read result of the defect information reading device 3, and the like.
(labeling apparatus)
Next, the marking device 4 included in the defect inspection system 10 will be described.
As shown in fig. 13, the marking device 4 includes a droplet ejection device 20, a shutter 30 (shutter member), a fixing member 40, and a suction device 60. First, among the components of the marking device 4, the droplet ejection device 20, the shutter 30, and the fixing member 40, other than the suction device 60, will be described in the following description.
Fig. 6 is a perspective view showing the liquid droplet ejection device 20, the shielding plate 30, and the fixing member 40 in the marking device 4 according to the first embodiment.
As shown in fig. 6, the marking device 4 includes a droplet ejection device 20, a shielding plate 30, and a fixing member 40. The marking device 4 prints dot-like marks 12 larger than the defect at the defect position of the optical film F10X by discharging the ink 4i to the optical film F10X.
In the following description, an xyz rectangular coordinate system is set as necessary, and the positional relationship of each member is described with reference to the xyz rectangular coordinate system. In the present embodiment, the normal direction of the emission surface 22 of the droplet emission device 20 is defined as the x direction, the direction orthogonal to the x direction within the surface of the emission surface 22 (the width direction of the emission surface 22) is defined as the y direction, and the directions orthogonal to the x direction and the y direction are defined as the z direction. Here, the x direction and the y direction are in a horizontal plane, and the z direction is a vertical direction (vertical direction). The x direction may be referred to as a front-rear direction, and the y direction may be referred to as a left-right direction. The + x direction is sometimes referred to as the front direction, the-x direction is sometimes referred to as the rear direction, the + y direction is sometimes referred to as the left direction, the-y direction is sometimes referred to as the right direction, the + z direction is sometimes referred to as the up direction, and the-z direction is sometimes referred to as the down direction.
As shown in fig. 6, the marking device 4 ejects the ink 4i from the horizontal direction orthogonal to the vertical direction to the optical film F10X conveyed in the direction V1 (upward) parallel to the vertical direction on the conveyance line 9. For example, the transport speed (hereinafter referred to as "linear speed") of the optical film F10X is 50m/min or less as a range in which the logo 12 can be printed on the optical film F10X. In the present embodiment, the linear velocity is set to a value of 30m/min or less.
Fig. 7 is a front view showing the droplet discharge device 20, the shielding plate 30, and the fixing member 40 in the marking device 4 according to the first embodiment. Fig. 8 is a sectional view VIII-VIII of fig. 7. Fig. 9 is an enlarged view of a main portion of fig. 8, and is a view for explaining an operation of the shielding plate 30 according to the first embodiment. In fig. 9, the fixing member 40 is not shown for convenience.
As shown in fig. 7, the droplet discharge device 20 includes a plurality of discharge heads 20A capable of discharging ink. In fig. 7, 3 injection heads 20A are shown as an example, but the number of injection heads 20A is not limited thereto, and may be appropriately set to 1, 2, 4 or more, or the like as needed. The injection head 20A has a rectangular parallelepiped shape having a long side in the y direction. The emission surface 22 (see fig. 8) of the emission head 20A is rectangular in shape having a long side in the y direction when viewed from the front in fig. 7.
The shielding plate 30 is provided in plural for the plural ejection heads 20A. In fig. 7, 3 shielding plates 30 provided for 3 injection heads 20A are shown as an example, but the number of shielding plates 30 is not limited to this, and can be set in accordance with the number of injection heads 20A, and can be appropriately set to 1, 2, or 4 or more, as necessary. A surface 32 (hereinafter referred to as "first main surface") of the shielding plate 30 on the side opposite to the emission surface 22 is a rectangle having substantially the same size as the emission surface 22 in a front view of fig. 7.
The fixing member 40 is provided in plural so as to be able to fix the shielding plate 30 to each of the plurality of injection heads 20A. In fig. 7, 3 fixing members 40 provided so that the shield plate 30 can be fixed to each of the 3 injection heads 20A are shown as an example, but the number of the fixing members 40 is not limited to this, and can be set in accordance with the number of the injection heads 20A and the shield plate 30, and can be appropriately set to 1, 2, or 4 or more as needed. The fixing member 40 has a rectangular frame shape along the outer shape of the first main surface 32 of the shielding plate 30 in the front view of fig. 7.
For example, the ejection head 20A employs a valve-type inkjet head. For example, the amount of ink ejected from the ejection hole 21 of the ejection head 20A (hereinafter referred to as "droplet amount") is set to a value in the range of 0.05 μ L or more and 0.2 μ L or less so that the dot-like marks 12 printed on the optical film F10X have a diameter (hereinafter referred to as "dot diameter") in the range of 1mm or more and 10mm or less. In the present embodiment, the droplet amount is set to about 0.166 μ L.
For example, the injection is made from the injection hole 21 of the injection head 20AThe viscosity of the ink (hereinafter referred to as "ink viscosity") was set to 0.05X 10 -3 Pa · s or more and 1.00X 10 -3 Pa · s or less so that the dot diameter is in the range of 1mm to 10 mm. In this embodiment, the ink viscosity is set to 0.89 × 10 -3 Pa·s。
For example, the discharge speed of ink discharged from the discharge head 20A (hereinafter referred to as "ink discharge speed") is a value in a range of 1m/s to 10m/s, preferably 4m/s to 5m/s, as a printable range. In the present embodiment, the ink ejection speed is set to about 4.2 m/s. By setting the ink ejection speed within the above range, printing can be performed with high accuracy on the target print area of the optical film F10 during conveyance, and generation of droplets (for example, the second droplets 4b shown in fig. 14) during ink ejection can be suppressed. Here, "ink landing" means that the ejected ink 4i comes into contact with the optical film F10X, and the shape of the ink 4i is broken and the optical film F10X is printed.
For example, the opening time of the injection hole 21 of the injection head 20A is set to a value in a range of 0.5ms or more, preferably 0.8ms or more and 1.5ms or less, and more preferably 0.9ms or more and 1.2ms or less, as a range in which the mark 12 can be printed on the optical film F10X. In the present embodiment, the opening time is set to about 1.0 ms. By setting the opening time within the above range, the amount of ink to be ejected can be stabilized, a desired dot diameter can be formed, and generation of the droplets 4a at the time of ink ejection can be suppressed.
For example, as the range in which the mark 12 can be printed on the optical film F10X, the discharge pressure (hereinafter referred to as "ink discharge pressure") at which ink is discharged from the discharge head 20A is set to a range of 0.030MPa or less, and preferably a value in a range of 0.020MPa or more and 0.028MPa or less. In the present embodiment, the ink discharge pressure is set to about 0.025 MPa. By setting the ink ejection pressure within the above range, the ink ejection speed can be stabilized, and generation of droplets 4a at the time of ink ejection and droplets (for example, second droplets 4b shown in fig. 14) at the time of ink ejection can be suppressed.
For example, the distance K1 (see fig. 9) between the ejection hole 21 of the ejection head 20A and the optical film F10X is set to a value of 50mm or less, preferably 5mm to 15mm, as long as the mark 12 can be printed on the optical film F10X. The reason for this is that if the distance K1 is excessively reduced, the ejection head 20A may come into contact with the optical film F10X, and if the distance K1 is excessively increased, the splashes that are scattered when the ink is ejected from the ejection hole 21 may spread over a wide range. In the present embodiment, the distance K1 is set to about 13 mm. The distance K1 is the length of a line segment connecting the center of the emission hole 21 of the emission surface 22 and the printing surface (surface on the (-x direction side) of the optical film F10X) in the normal direction of the emission surface 22. The distance between the emission hole 21 of the emission head 20A and the optical film F10X corresponds to the distance between the emission surface 22 of the emission head 20A and the optical film F10X.
For example, as a range in which the logo 12 can be printed on the optical film F10X, the wind speed around the optical film F10X generated by the conveyance of the optical film F10X is set to a value in a range of 0.5m/s or less, preferably 0.2m/s or less. In the present embodiment, the wind speed is about 0.1m/s under the condition that the linear velocity is about 25 m/min. If the wind speed is within the above range, the generated droplets 4a and 4b can be suppressed from spreading over a wide range.
A plurality of ejection holes 21 for ejecting ink to the optical film F10X are formed in the ejection surface 22 of the ejection head 20A (droplet ejection apparatus 20). The plurality of emission holes 21 are arranged in a row at the center of the emission surface 22 in the vertical direction (z direction) along the width direction (y direction) of the emission surface 22. In fig. 7, 9 emission holes 21 are shown for each emission surface 22 as an example, but in the present embodiment, 16 emission holes 21 are formed for each emission surface 22. The number of the injection holes 21 is not limited to this, and may be appropriately set to 8 or less, 10 or more, or the like as necessary. The row of the injection holes 21 is not limited to 1 row, and can be appropriately set to 2 rows or more as necessary. The ejection hole 21 is circular in a front view of fig. 7.
As shown in fig. 8, the shielding plate 30 is provided on the emission surface 22. As shown in fig. 9, the shielding plate 30 has a thickness t1 in a direction (x direction) parallel to the normal line of the emission surface 22. For example, the thickness t1 of the shielding plate 30 is preferably set to a value in the range of 2mm or more and 10mm or less, and more preferably set to a value in the range of 2mm or more and 5mm or less. In the present embodiment, the thickness t1 of the shielding plate 30 is set to be about 3 mm. The thickness t1 of the shielding plate 30 is preferably as large as possible within a range where the shielding plate 30 does not contact the optical film F10X.
The shielding plate 30 can shield the droplets 4a scattered when the ink 4i is ejected from the ejection hole 21. The shielding plate 30 has an opening 31 that opens at a position facing the injection hole 21. The opening 31 has an inner wall surface 31a facing the discharge passage Ia through which the ink 4i is discharged. The inner wall surface 31a of the opening 31 is cylindrical with the injection passage Ia as the center axis. The inner wall surface 31a of the opening 31 blocks the droplets 4a that are scattered in a direction intersecting the normal line of the emission surface 22 when the ink 4i is emitted from the emission hole 21. At least a part of the splashed droplets 4a adheres to the inner wall surface 31a of the opening 31.
As shown in fig. 7, a plurality of openings 31 are provided for the plurality of injection holes 21. The plurality of openings 31 are arranged in a row in the width direction (y direction) of the first main surface 32 at the center in the vertical direction (z direction) of the first main surface 32. In fig. 7, 9 opening portions 31 are shown for each shutter 30 as an example, but in the present embodiment, 16 opening portions 31 are provided for each shutter 30 and 16 injection holes 21. The number of the openings 31 is not limited to this, and may be appropriately set to 8 or less, or 10 or more, as necessary. The number of rows of the openings 31 is not limited to 1 row, and may be appropriately set to 2 or more rows, if necessary. The opening 31 is circular in front view in fig. 7.
As shown in fig. 9, the diameter d1 of the opening 31 is larger than the diameter d2 of the injection hole 21 (dl > d 2). For example, the ratio d1/d2 between the diameter d1 of the opening 31 and the diameter d2 of the injection hole 21 is preferably in the range of 1.5 or more and 5 or less, and more preferably in the range of 2 or more and 4 or less. In the present embodiment, the ratio d1/d2 is about 3, the diameter d1 of the opening 31 is about 3mm, and the diameter d2 of the injection hole 21 is about 1 mm. The diameter d2 of the injection hole 21 may be set to a value in the range of 0.1mm to 2 mm.
The first principal surface 32 of the shielding plate 30 is separated from the optical film F10X. For example, the distance L1 between the first main surface 32 of the shielding plate 30 and the optical film F10X is preferably 10mm or less, and more preferably 5mm or less. In the present embodiment, the distance L1 is set to about 10 mm. The distance L1 is preferably reduced as much as possible within a range where the shutter 30 does not contact the optical film F10X.
The shielding plate 30 abuts on the emission surface 22. In other words, the surface 35 (hereinafter referred to as "second main surface") of the shielding plate 30 on the emission surface 22 side is arranged on the same plane as the emission surface 22.
For example, the shielding plate 30 is formed of a metal plate such as SUS, or a plastic plate such as an acrylic plate and a polypropylene plate (PP plate). In the present embodiment, the shielding plate 30 is formed of an acrylic plate. The shielding plate 30 may be formed of a plate material that does not react with ink. This can suppress corrosion of the shield plate 30 by ink, and therefore can improve the corrosion resistance of the shield plate 30.
The fixing member 40 fixes the shielding plate 30 to the ejection head 20A. As shown in fig. 8, the fixing member 40 includes a first wall portion 41 and a second wall portion 42. For example, the fixing member 40 is formed of a metal plate such as SUS.
The first wall portion 41 covers the side ends 23, 33 of both the injection head 20A and the shielding plate 30, which are arranged in the direction orthogonal to the normal line of the injection surface 22. The first wall portion 41 has a rectangular tubular shape extending in the front-rear direction (x direction). The first wall portion 41 abuts both the portion of the side end 23 of the injection head 20A on the injection surface 22 side in the vertical direction (z direction) and the width direction (y direction) and the side end 33 of the shielding plate 30 in the vertical direction (z direction) and the width direction (y direction). For example, the first wall portion 41 is fastened to the injection head 20A by a fastening member such as a bolt. This regulates the vertical movement (z direction) and the width direction (y direction) of the injection head 20A and the shielding plate 30 relative to each other.
The second wall portion 42 covers the outer edge portion 34 of the outer periphery of the opening 31 in the first main surface 32 of the shield plate 30. The second wall portion 42 has a rectangular frame shape extending from the front end (+ x direction end) of the first wall portion 41 toward the inside in the z direction. The second wall portion 42 abuts against the outer edge portion 34 of the outer periphery of the opening 31 in the first main surface 32 of the shield plate 30. For example, the second wall portion 42 is integrally formed with the first wall portion 41 by the same member. The second wall portion 42 may be fastened to the first wall portion 41 by a fastening member such as a bolt. This regulates the relative movement in the front-rear direction (x direction) of the injection head 20A and the shielding plate 30.
The suction device 60 among the components of the marking device 4 will be described below. Fig. 13 is a perspective view showing the labeling device 4 according to the first embodiment. Fig. 14 includes an enlarged view of a main portion of fig. 13, and is a diagram for explaining an operation of the suction device 60 according to the first embodiment. For convenience, only the second suction mechanism 62 (lower suction mechanism) is illustrated in fig. 13, and the first suction mechanism 61 and the second suction mechanism 62 are illustrated in fig. 14. In fig. 13, the optical film F10X is shown by a two-dot chain line for convenience.
As shown in fig. 13, the marking device 4 includes a droplet ejection device 20, a shutter 30, a fixing member 40, and a suction device 60.
As shown in fig. 14, the suction device 60 is disposed between the emission surface 22 and the optical film F10X. The suction device 60 sucks the splashes that are splashed while the ink 4i is ejected from the ejection hole 21 and landed on the optical film F10X. The droplets include at least one of the first droplets 4a that are scattered when the ink 4i is ejected from the ejection hole 21 and the second droplets 4b that are scattered when the ink 4i is ejected onto the optical film F10X. The first droplets 4a and the second droplets 4b have a particularly large influence on the printing object.
Here, as the droplets splashed during the period from when the ink 4i is ejected from the ejection hole 21 to when the ink is landed on the optical film F10X, in addition to the droplets 4a and 4b generated at the time of ejection and landing of the ink, droplets splashed during the period from when the ink 4i flies from the ejection hole 21 toward the optical film F10X may be mentioned. However, the droplets 4a and 4b generated during the flight of the ink 4i are less in number and have a very small size, compared to the droplets 4a and 4b generated during the ejection and landing of the ink, and therefore it is considered that the droplets are unlikely to contaminate the printing target.
The first droplets 4a include droplets that pass through the opening 31 of the shield plate 30 without adhering to the inner wall surface 31a of the opening 31 and float in the air. In addition, the droplets splashed during flight of the ink 4i have the same movement as the first droplets 4 a.
As shown in fig. 13, in the present embodiment, the suction device 60 includes a second suction mechanism 62. The second suction mechanism 62 is disposed only below the discharge passage Ia through which the ink 4i is discharged in the vertical direction. The second suction mechanism 62 has a suction surface 62f inclined forward and upward so as to face the injection passage Ia.
Suction holes 62h for sucking the first droplets 4a and the second droplets 4b are formed in the suction surface 62f of the second suction mechanism 62. The suction holes 62h extend on the suction surface 62f so as to have long sides along the width direction (y direction) of the suction surface 62 f. In fig. 13, as an example, the suction holes 62h extending along the width direction (y direction) of the suction surface 62f are illustrated, but the arrangement of the suction holes 62h is not limited to this, and the suction holes 62h may be appropriately set as needed, such as by dividing the suction holes 62h in the width direction (y direction) of the suction surface 62f so that a plurality of suction holes are arranged in a row along the width direction (y direction) of the suction surface 62 f.
For example, a distance J1 between the suction surface 62F and the optical film F10X (hereinafter referred to as "suction surface-optical film distance") is set to a value of 10mm or more. The reason for this is that if the distance J1 between the suction surface and the optical film is excessively reduced, the suction surface 62F may contact the optical film F10X. In the present embodiment, the distance J1 between the suction surface and the optical film is about 10 mm. The suction surface-optical film distance J1 is a length of a line segment connecting the lower end of the suction surface 62F and the printing surface of the optical film F10X in the normal direction (x direction) of the printing surface.
For example, a distance J2 between the suction surface 62f and the fixing member 40 (hereinafter referred to as "suction surface-fixing member distance") is set to a value of 30mm or more. The reason for this is that if the suction surface-fixing member distance J2 is excessively reduced, the suction surface 62f may come into contact with the fixing member 40. In the present embodiment, the distance J2 between the suction surface and the fixing member is about 30 mm. The suction surface-fixing member distance J2 is defined as the length of a line segment connecting the upper end of the suction surface 62f and the lower end of the fixing member 40 in the normal direction (z direction) of the lower surface of the fixing member 40.
For example, the distance J3 between the suction hole 62h and the injection hole 21 (hereinafter referred to as "suction hole-injection hole distance") is preferably set to a value of 50mm or less, and more preferably to a value in a range of 15mm to 50 mm. In the present embodiment, the distance J3 between the suction hole and the ejection hole is set to be about 45 mm. The suction hole-emission hole distance J3 is defined as the length of a line segment connecting the center of the suction hole 62h in the suction surface 62f and the center of the emission hole 21 in the emission surface 22.
For example, the length of the suction hole 62h is set to be approximately the same as the length of the suction surface 62f in the width direction (y direction), specifically, set to be smaller than the length of the suction surface 62f in the width direction (y direction) by an amount corresponding to the thickness of the left and right side walls of the second suction mechanism 62. The length of the suction holes 62h is set to the length of the suction holes 62h in the longitudinal direction (y direction).
For example, the width of the suction holes 62h is preferably 50mm or less, and more preferably 5mm or more and 20mm or less. In the present embodiment, the width of the suction hole 62h is set to about 10 mm. The width of the suction holes 62h is set to the length of the suction holes 62h in the short side direction (the direction in which the suction surface 62f is inclined).
For example, the air speed when the droplets are sucked through the suction holes 62h (hereinafter referred to as "suction air speed") is preferably a value of 2m/sec or more, and more preferably a value in a range of 5m/sec or more and 7m/sec or less. In the present embodiment, the suction wind speed is set to 6.4 m/sec. The suction air velocity is set to a value in a range of 4m/sec to 20m/sec as a range in which the ink 4i (not the droplet but the main droplet) is not pulled.
The size of the suction holes 62h can be changed. For example, the size of the suction holes 62h can be changed by providing a closing mechanism such as a shutter on the suction surface 62f, the closing mechanism being movable along the longitudinal direction of the suction holes 62 h.
The second suction mechanism 62 is shaped so as to extend obliquely upward and forward so that the suction surface 62f faces the injection passage Ia. Specifically, the second suction mechanism 62 includes a suction surface 62f having a rectangular shape with a long side in the width direction (y direction), and left and right side surfaces 64 having a trapezoidal shape extending forward and upward with the left and right side edges of the suction surface 62f as upper bottoms. A support shaft 65 that protrudes to the left and right sides (y direction) in parallel with the normal line of the left and right side surfaces 64 is provided at the rear end portion (-x direction side end portion) of the second suction mechanism 62.
Support mechanisms 73 are provided on the left and right sides of the second suction mechanism 62 to rotatably support the second suction mechanism 62. A table 72 extending in the film width direction (y direction) is provided below the second suction mechanism 62. The support mechanism 73 includes: a support base 73a fixed to the base 72, a support plate 73b fixed to the support base 73a, and a rising piece 73c extending upward from the widthwise inner end (+ y-direction end) of the support plate 73 b.
The rising piece 73c is formed with a long hole 73h that opens in the thickness direction (y direction) of the rising piece 73c and extends vertically. The support shaft 65 of the second suction mechanism 62 passes through the long hole 73h of the rising piece 73 c. The size of the elongated hole 73h is set to a size that enables the support shaft 65 to move up and down and to rotate around the axis of the support shaft 65. In the inserted state through the long hole 73h, the support shaft 65 protrudes laterally from the rising piece 73 c. The support shaft 65 is fixed to the rising piece 73c by a fixing tool, not shown, so that the vertical movement of the second suction mechanism 62 and the rotation around the axis of the support shaft 65 are restricted. For example, a screw thread may be formed at the left and right end portions of the support shaft 65, and the position of the second suction mechanism 62 may be regulated by screwing and fastening a nut or the like to the screw thread of the support shaft 65.
In the figure, reference numeral 71 denotes a support base for supporting the droplet ejection device 20. The support base 71 extends in the width direction (y direction) of the droplet discharge device 20. For example, the droplet discharge device 20 is fastened to the support base 71 by a fastening member such as a bolt.
As described above, the marking device 4 according to the present embodiment can mark the mark 12 by ejecting the ink 4i to the optical film F10X, and the marking device 4 includes: a droplet ejection device 20 having an ejection surface 22 on which ejection holes 21 for ejecting the ink 4i to the optical film F10X are formed; and a suction device 60 that is provided between the emission surface 22 and the optical film F10X and can suck at least one of the first droplets 4a that are scattered when the ink 4i is emitted from the emission hole 21 and the second droplets 4b that are scattered when the ink 4i is ejected onto the optical film F10X.
According to this embodiment, the suction device 60 is provided between the emission surface 22 and the optical film F10X, the suction device 60 can suck at least one of the first droplets 4a splashed when the ink 4i is ejected from the ejection hole 21 and the second droplets 4b splashed when the ink 4i is ejected and landed on the optical film F10X, thus, compared with the case where the ink 4i is directly ejected from the droplet ejection apparatus 20 without providing the suction apparatus 60, the first spray 4a and the second spray 4b splashed between the ejection surface 22 and the optical film F10X can be sucked, therefore, even if the first droplets 4a are scattered when the ink 4i is ejected from the ejection hole 21 or the second droplets 4b are scattered when the ink 4i is ejected onto the optical film F10X, the first droplets 4a and the second droplets 4b are prevented from adhering to the region other than the defective position of the optical film F10X, and the yield of the product can be improved.
Further, the second suction mechanism 62 is disposed only below the discharge passage Ia through which the ink supply 4i is discharged in the vertical direction, and thus, as compared with the case where the suction mechanisms are disposed on both sides of the discharge passage Ia, the number of components can be reduced, a simple configuration can be provided, the cost can be reduced, and the first mist 4a and the second mist 4b that are splashed to a position below the discharge passage Ia due to the influence of gravity can be selectively sucked. In particular, when the dot diameter is large (when the amount of liquid droplets is large), the amount of droplets splashed downward when the optical film F10X is conveyed in the vertical direction increases, and therefore the actual benefit of providing only the second suction mechanism 62 (the actual benefit of disposing the suction mechanism only below the ejection passage Ia) increases.
In the above embodiment, the example in which the second suction mechanism 62 is disposed only below the discharge passage Ia through which the ink supply 4i is discharged in the vertical direction has been described, but the present invention is not limited to this. For example, as shown in fig. 14, the suction device 60 may include: a first suction mechanism 61 disposed on one side with an emission path Ia through which the ink 4i is emitted, and a second suction mechanism 62 disposed on the other side with the emission path Ia therebetween. That is, the suction mechanisms 61 and 62 may be disposed on both sides with the injection passage Ia therebetween. Thus, the first spray 4a and the second spray 4b, which are splashed on both sides through the injection passage Ia, can be efficiently sucked with a simple configuration.
The first suction mechanism 61 may be disposed above the injection passage Ia in the vertical direction, and the second suction mechanism 62 (corresponding to the second suction mechanism 62 of the above-described embodiment) may be disposed below the injection passage Ia in the vertical direction. Thus, the first spray 4a and the second spray 4b, which are splashed upward and downward through the injection passage Ia, can be efficiently sucked with a simple configuration.
The first suction mechanism 61 sucks the first and second droplets 4a and 4b splashed above the discharge passage Ia, and the second suction mechanism 62 sucks the first and second droplets 4a and 4b splashed below the discharge passage Ia. The droplets sucked by the first suction means 61 are transferred in the direction of arrow Q1 through a pipe, and the droplets sucked by the second suction means 62 are transferred in the direction of arrow Q2 through a pipe and stored in tanks, not shown.
Further, since the shutter 30 is provided on the emission surface 22, and the shutter 30 is capable of shielding the droplets 4a splashed when the ink 4i is emitted from the emission hole 21, and the shutter 30 is provided with the opening 31 which opens at a position facing the emission hole 21 and has the inner wall surface 31a shielding the droplets 4a splashed in the direction intersecting the normal line of the emission surface 22, the spread range of the droplets 4a splashed in the direction intersecting the normal line of the emission surface 22 can be reduced, specifically, the splash diameter L2 (see fig. 9) centered on the mark 12 when the droplets 4a adhere to the optical film F10X can be reduced, and even if the droplets 4a are splashed when the ink 4i is emitted from the emission hole 21, the droplets 4a can be prevented from adhering to a region other than the defective position 10X of the optical film F10, thereby improving the yield of the product.
Further, by providing the shutter 30 having the thickness t1 in the direction parallel to the normal line of the emission surface 22, the spreading range of the mist 4a can be adjusted by adjusting the thickness t1 of the shutter 30, and therefore, the mist 4a can be prevented from adhering to a region other than the defective position of the optical film F10X. For example, by increasing the thickness t1 of the shutter 30 as much as possible within a range where the shutter 30 does not contact the optical film F10X, the diffusion range of the spray 4a can be minimized.
Further, since the shielding plate 30 is provided with the fixing member 40 capable of fixing the shielding plate 30 to the droplet discharge device 20, the shielding plate 30 can be easily and firmly fixed to the droplet discharge device 20 as compared with a case where the fixing member 40 is not provided.
Further, the fixing member 40 includes: a first wall portion 41 that covers the side end portions 23 and 33 of both the injection head 20A and the shielding plate 30, which are arranged in the direction orthogonal to the normal line of the injection surface 22; and a second wall portion 42 that covers the outer edge portion 34 of the outer periphery of the opening 31 in the first main surface 32 of the shield plate 30, whereby the shield plate 30 can be firmly fixed to the injection head 20A, and the relative movement in the front-rear, left-right, vertical direction (xyz direction) of the injection head 20A and the shield plate 30 can be restricted by a simple structure.
Further, since the droplet jetting apparatus 20 includes the plurality of jetting heads 20A capable of jetting the ink 4i, the shielding plate 30 is provided in plurality for the plurality of jetting heads 20A, and the fixing member 40 is provided in plurality so that the shielding plate 30 can be fixed to each of the jetting heads 20A of the plurality of jetting heads 20A, the shielding plate 30 and the fixing member 40 can be positioned in a one-to-one relationship with each of the jetting heads 20A, relative positional displacement of the jetting heads 20A, the shielding plate 30, and the fixing member 40 can be suppressed as compared with a case where the shielding plate and the fixing member are provided in accordance with the size of the plurality of jetting heads 20A.
Further, the shield plate 30 abuts on the emission surface 22, and therefore, compared with the case where the shield plate 30 is separated from the emission surface 22, it is easy to restrict the relative movement in the front-rear direction (x direction) of the emission head 20A and the shield plate 30.
Further, the diameter d1 of the opening 31 is made larger than the diameter d2 of the injection hole 21, so that the ink 4i injected from the injection hole 21 can be prevented from contacting the opening 31.
The defect inspection system 10 according to the present embodiment includes: a conveying line 9 for conveying the long strip-shaped optical film F10X; a defect inspection apparatus 2 for inspecting a defect of the optical film F10X conveyed by the conveying line 9; and a marking device 4 capable of printing a mark 12 by discharging ink 4i to the position of the defect 11 based on the result of the defect inspection.
According to the present embodiment, by providing the marking device 4 described above, even if the first droplets 4a are scattered when the ink 4i is ejected from the ejection hole 21 or the second droplets 4b are scattered when the ink 4i is ejected onto the optical film F10X, the first droplets 4a and the second droplets 4b are prevented from adhering to a region other than the defective position of the optical film F10X, and the yield of the product can be improved. Further, since the marking device 4 is provided and the marking device 4 can print the mark 12 in accordance with the position of the defect by discharging the ink 4i to the position of the defect 11 based on the result of the defect inspection and can print the mark 12 in accordance with the position of the defect, it is possible to effectively suppress the adhesion of the droplets 4a and 4b to the region other than the defective position of the optical film F10X and further improve the yield of the product.
Further, the marking device 4 ejects the ink 4i from the horizontal direction orthogonal to the vertical direction to the optical film F10X conveyed in the direction parallel to the vertical direction by the conveyance line 9, and thereby it is possible to suppress the ink 4i from naturally dropping from the ejection hole 21 due to the influence of gravity, compared to the case where the marking device 4 ejects the ink 4i from above to the optical film F10X conveyed in the horizontal direction.
The film manufacturing apparatus 1 according to the present embodiment includes the defect inspection system 10 described above.
According to the present embodiment, by providing the defect inspection system 10 described above, even if the first droplets 4a are scattered when the ink 4i is ejected from the ejection hole 21 or the second droplets 4b are scattered when the ink 4i is ejected onto the optical film F10X, the first droplets 4a and the second droplets 4b are prevented from adhering to a region other than the defective position of the optical film F10X, and the yield of the product can be improved. Further, by printing the mark 12 in accordance with the position of the defect, the adhesion of the droplets 4a and 4b to the region other than the defective position of the optical film F10X can be effectively suppressed, and the yield of the product can be further improved.
The film manufacturing method according to the present embodiment includes a step of marking using the defect inspection system 10 described above.
According to the present embodiment, including the marking step described above, even if the first droplets 4a are scattered when the ink 4i is ejected from the ejection hole 21 or the second droplets 4b are scattered when the ink 4i is ejected onto the optical film F10X, the first droplets 4a and the second droplets 4b are prevented from adhering to a region other than the defective position of the optical film F10X, and the yield of the product can be improved. Further, by printing the mark 12 in accordance with the position of the defect, the adhesion of the droplets 4a and 4b to the region other than the defective position of the optical film F10X can be effectively suppressed, and the yield of the product can be further improved.
Factors that cause splash when ink is ejected from the ejection hole include the amount of droplets (a1), the viscosity of ink (a2), and the like.
The above factors are explained below.
If the amount of droplets is small, it is considered that substantially no droplets are scattered when the ink is ejected from the ejection hole, or that the optical film is hardly contaminated by the droplets even if droplets are scattered. On the other hand, through the research of the inventor, the following results are found: if the amount of droplets is large, droplets may be scattered when the ink is ejected from the ejection hole, and the scattered droplets may contaminate the optical film.
For example, in a commercially available ink jet printer, the amount of droplets is 1X 10 -6 Since the droplet amount is small around μ L, it is considered that droplets are hardly scattered when the ink is ejected from the ejection hole, or the optical film is hardly contaminated even if droplets are scattered. On the other hand, in the droplet ejection apparatus 20 according to the present embodiment, since the droplet amount is about 0.166 μ L and is very large compared with a commercially available ink jet printer, there is a case where the droplet is ejected from the ejection holeDroplets are scattered when ink is applied, and the scattered droplets contaminate the optical film.
Further, if the ink viscosity is high, it is considered that the ink is ejected from the ejection hole with little splash. On the other hand, through the research of the inventor, the following results are found: if the viscosity of the ink is low, droplets are scattered when the ink is ejected from the ejection hole, and the scattered droplets contaminate the optical film.
For example, in a commercially available ink jet printer, the ink viscosity is 1.17X 10 -3 Pa · s or so. On the other hand, in the droplet ejection apparatus 20 according to the present embodiment, the ink viscosity is 0.89 × 10 -3 Pa · s is smaller than that of a commercially available ink jet printer, and therefore droplets may be scattered when ink is ejected from an ejection hole, and the scattered droplets may contaminate the optical film.
Even when droplets are scattered when ink is ejected from the ejection hole due to the above-described factors (a1), (a2), and the like, according to the present embodiment, the opening 31 is formed in the shutter 30, the opening 31 is opened at a position facing the emission hole 21, and has an inner wall surface 31a for shielding the spray 4a splashed in a direction intersecting the normal line of the emission surface 22, thus, compared with the case where the ink 4i is directly ejected from the droplet ejection apparatus 20 without providing the shielding plate 30, the spreading range of the spray 4a that is splashed in the direction intersecting the normal line of the ejection surface 22 can be reduced, specifically, the splash diameter L2 (see fig. 9) centered on the indicator 12 when the spray 4a is attached to the optical film F10X can be reduced, therefore, the adhesion of the droplets 4a to the region other than the defective position of the optical film F10X can be effectively suppressed, and the yield of the product can be further improved.
On the other hand, factors that splash when ink is ejected onto an optical film (printing object) include (B1) dot diameter (droplet amount), (B2) ink viscosity, (B3) printing object, and (B4) line speed.
The above factors are explained below.
If the dot diameter is extremely small (the amount of droplets is small), it is considered that the ink does not scatter when it is ejected onto the printing object, or the ink does not easily contaminate the printing object even if it scatters. On the other hand, through the research of the inventor, the following results are found: if the dot diameter is large (if the amount of droplets is large), droplets are scattered when the ink is ejected onto the printing object, and the scattered droplets contaminate the printing object.
For example, in a commercially available ink jet printer, the dot diameter is very small at about 20 μm, and the amount of droplets is estimated to be 1X 10 -6 About μ L, it is considered that when ink is ejected onto a printing object, droplets are hardly scattered, or even if droplets are scattered, droplets are not easily contaminated. On the other hand, in the droplet ejection apparatus 20 according to the present embodiment, the droplet amount is estimated to be about 0.166 μ L for a value in the range of the dot diameter of 1mm or more and 10mm or less, and the dot diameter is very large (the droplet amount is very large) compared to a commercially available inkjet printer, and therefore, droplets are scattered when ink is ejected onto a printing object, and the scattered droplets contaminate the printing object in some cases.
Further, if the ink viscosity is high, it is considered that the ink does not substantially splash when being ejected onto the printing object. On the other hand, through the research of the inventor, the following results are found: if the ink viscosity is low, droplets are scattered when the ink is ejected onto the printing object, and the scattered droplets contaminate the printing object.
For example, in a commercially available ink jet printer, the ink viscosity is 1.17X 10 -3 About Pa · s. On the other hand, in the droplet discharge device 20 according to the present embodiment, the ink viscosity is 0.89 × 10 -3 Pa · s is smaller than that of a commercially available ink jet printer, and therefore droplets may be scattered when ink is ejected onto a printing object, and the printing object may be contaminated with the scattered droplets.
In addition, if the printing target is a paper medium such as recording paper, it is considered that the ink is hardly splashed when it is ejected onto the printing target. On the other hand, through the research of the inventor, the following results are found: if the printing object is an optical film including PVA and TAC, droplets are scattered when the ink is ejected onto the printing object, and the scattered droplets contaminate the printing object.
For example, in a commercially available inkjet printer, the printing object is a paper medium. On the other hand, in the droplet ejection apparatus 20 according to the present embodiment, the printing object is an optical film, and droplets may be scattered when ink is ejected onto the printing object, and the scattered droplets may contaminate the printing object.
In addition, if the linear velocity is low, it is considered that the ink jet hardly splashes when it lands on the printing object. On the other hand, through the research of the inventor, the following results are found: if the linear velocity is high, droplets are scattered over a wide range when the ink is ejected onto the printing object, and the scattered droplets contaminate the printing object.
For example, in a commercially available inkjet printer, the linear velocity is about 3m/min and is small. On the other hand, in the present embodiment, the linear velocity is a value of 30m/min or less, and the upper limit is a value of 50m/min or less as the range in which the mark 12 can be printed on the optical film F10X, and therefore, droplets may be scattered over a wide range when ink is ejected onto a printing object, and the scattered droplets may contaminate the printing object.
Even when droplets are splashed when ink is ejected from the ejection hole due to the above-described factors (a1), (a2), and the like, and when droplets are splashed when ink is ejected onto a printing target due to the above-described factors (B1) to (B4), and the like, according to the present embodiment, the suction device 60 is provided between the ejection surface 22 and the optical film F10X, and the suction device 60 can suck at least one of the first droplets 4a splashed when ink 4i is ejected from the ejection hole 21 and the second droplets 4B splashed when ink 4i is ejected onto the optical film F10X, so that the first droplets 4a and the second droplets 4B splashed between the ejection surface 22 and the optical film F10X can be sucked, compared with the case where the ink 4i is ejected directly from the droplet ejection device 20 without providing the suction device 60, and the first droplets 4a and the second droplets 4B are effectively suppressed from adhering to the region 84 other than the defective position of the optical film F10X, thereby further improving the yield of the product.
A modified example of the embodiment will be described below. In the following modification, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
(first modification of fixing Member)
Fig. 10 is a view showing a first modification of the fixing member, and is a sectional view corresponding to fig. 8.
In the above embodiment, the fixing member 40 and the shielding plate 30 are formed as separate members. In contrast, in the present modification, as shown in fig. 10, the fixing member 140 and the shielding plate 130 are integrally formed of the same member.
The fixing member 140 is fixed to the ejector 20A together with the shielding plate 130. The fixing member 140 includes the shielding plate 130 and a side wall 141. For example, the fixing member 140 is formed of a metal plate such as SUS.
The side wall portion 141 covers the side end portion 23 of the emission head 20A arranged in the direction orthogonal to the normal line of the emission surface 22. The side wall 141 has a rectangular tubular shape extending in the front-rear direction (x direction). The side wall portion 141 abuts against a portion of the side end portion 23 of the injection head 20A on the injection surface 22 side in the vertical direction (z direction) and the width direction (y direction).
The shielding plate 130 has a rectangular frame shape extending from the front end (+ x-direction end) of the side wall portion 141 toward the inside in the z-direction. The shielding plate 130 has an opening 131, and the opening 131 is opened at a position facing the injection hole 21 and has an inner wall surface 131a that shields the spray 4a that splashes in a direction intersecting the normal line of the injection surface 22. The shielding plate 130 abuts on the emission surface 22. In other words, the second main surface 135 of the shielding plate 130 and the emission surface 22 are arranged on the same plane.
The side wall portion 141 is fastened to the ejection head 20A by a fastening member such as a bolt, for example. This regulates the relative movement of the injection head 20A and the shield plate 30 in the vertical direction (z direction), the width direction (y direction), and the front-rear direction (x direction).
According to the present modification, the fixing member 140 is formed integrally with the shield plate 130, and includes the side wall portion 141 that covers the side end portion 23 of the injection head 20A arranged in the direction orthogonal to the normal line of the injection surface 22, so that the shield plate 130 can be firmly fixed to the injection head 20A, and the relative movement in the front-rear, left-right, up-down directions (xyz directions) of the injection head 20A and the shield plate 130 can be restricted with a simple structure. In addition, compared to the case where the fixing member 40 and the shielding plate 30 are formed of separate members, the number of components can be reduced, and the device structure can be simplified.
(second modification of fixing Member)
Fig. 11 is a view showing a second modification of the fixing member, and is a sectional view corresponding to fig. 8.
In the first modification, the shielding plate 130 is brought into contact with the emission surface 22. In contrast, in the present modification, as shown in fig. 11, the shielding plate 130 is separated from the emission surface 22. Specifically, the second main surface 135 of the shielding plate 130 is arranged forward (in the + x direction) of the emission surface 22.
According to the present modification, since the shielding plate 130 is separated from the emission surface 22, the spreading range of the spray 4a can be adjusted by adjusting the interval between the shielding plate 130 and the emission surface 22, and therefore, the spray 4a can be prevented from adhering to a region other than the defective position of the optical film F10X. For example, the spreading range of the spray 4a can be minimized by increasing the distance between the shielding plate 130 and the emission surface 22 as much as possible within the range where the shielding plate 130 does not contact the optical film F10X. Further, as compared with the case where the shielding plate 130 is in contact with the emission surface 22, the spreading range of the mist 4a can be adjusted by adjusting only the interval between the shielding plate 130 and the emission surface 22 without adjusting the thickness t1 of the shielding plate 130, and thus the degree of freedom in design is improved.
(modification of the Shielding Member)
Fig. 12 is a view showing a modification of the shutter member, and is a cross-sectional view corresponding to fig. 8.
In the above embodiment, an example is described in which the shielding member includes the shielding plate 30 having a thickness in a direction parallel to the normal line of the emission surface 22. In contrast, in the present modification, as shown in fig. 12, a tubular member 230 extending in a direction parallel to the normal line of the output surface 22 is provided as the shielding member.
The tubular member 230 has an opening 231 that opens at a position facing the injection hole 21. As shown in fig. 12, the opening 231 has an inner wall surface 231a facing the discharge passage Ia (see fig. 9) through which the ink is discharged. The inner wall surface 231a of the opening 231 shields the droplets 4a (see fig. 9) that are scattered in a direction intersecting the normal line of the emission surface 22 when the ink is emitted from the emission hole 21.
The inner wall surface 231a of the opening 231 is cylindrical with the injection passage Ia as the center axis. The diameter of the opening 231 (the inner diameter of the tubular member 230) is larger than the diameter of the injection hole 21.
Cylindrical member 230 abuts emission surface 22. In other words, end surface 235 (second main surface) of tubular member 230 and emission surface 22 are arranged on the same plane.
According to the present modification, by providing the tube member 230 extending in the direction parallel to the normal line of the emission surface 22, the diffusion range of the spray 4a can be adjusted by adjusting the length (length in the x direction) of the tube member 230, and therefore, the spray 4a can be prevented from adhering to a region other than the defective position of the optical film F10X. For example, the length of the tube member 230 is increased as much as possible within a range where the tube member 230 does not contact the optical film F10X, and the spreading range of the spray 4a can be minimized.
Further, the diameter of the opening 231 is made larger than the diameter of the ejection hole 21, so that the ink 4i ejected from the ejection hole 21 can be prevented from contacting the opening 231.
(second embodiment)
The following describes a configuration of a labeling apparatus according to a second embodiment of the present invention. Fig. 15 is a perspective view showing a labeling device 204 according to a second embodiment. Fig. 16 includes an enlarged view of a main portion of fig. 15, and is a view for explaining an operation of the splash regulating member 50 in the marking device 204 according to the second embodiment. In fig. 16, for convenience, the fixed wall portions 53 and 54 are not shown. In fig. 15 and 16, the suction device 60 is not shown. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
In the first embodiment, as shown in fig. 13, an example is described in which the marking device 4 includes the droplet ejection device 20, the shielding plate 30, the fixing member 40, and the suction device 60. In contrast, in the present embodiment, as shown in fig. 15, the marking device 204 further includes the splash guard 50.
As shown in fig. 16, the spatter restricting member 50 is provided between the emission surface 22 and the optical film F10X. Specifically, the splash regulating member 50 is provided between the fixing member 40 and the optical film F10X in front of the shutter 30. The splash guard 50 shields at least one of the first spray 4a splashed when the ink 4i is ejected from the ejection hole 21 and the second spray 4b splashed when the ink 4i is ejected and landed on the optical film F10X.
A shielding surface 50f extending in a direction orthogonal to the normal line of the emission surface 22 is formed on the splash regulating member 50. In the splash regulating member 50, the shielding surface 50F on the emission surface 22 side regulates the first spray 4a from moving toward the optical film F10X side, and the shielding surface 50F on the optical film F10X side regulates the second spray 4b from moving toward the emission surface 22 side. That is, at least a part of the first splashed droplets 4a adheres to the shielding surface 50F on the emission surface 22 side in the splash regulating member 50, and at least a part of the second splashed droplets 4b adheres to the shielding surface 50F on the optical film F10X side in the splash regulating member 50.
The shielding surface 50f is not limited to extending in the direction orthogonal to the normal line of the emission surface 22, and may extend in the direction intersecting the normal line of the emission surface 22. For example, from the viewpoint of effectively shielding the first and second droplets 4a and 4b, the shielding surface 50F preferably extends in a direction parallel to the film conveying direction and in a direction orthogonal to the normal line of the emission surface 22 so as to maximize the facing area with respect to the optical film F10X. In the case where the above-described relationship cannot be secured due to the relationship of the device layout, the angle formed by the shielding surface 50f and the normal line of the emission surface 22 can be adjusted so as to be as parallel as possible to the film conveying direction.
As shown in fig. 15, the splash guard 50 includes splash guard plates 51 and 52 and fixed wall portions 53 and 54.
The splash regulating plates 51 and 52 have thicknesses in a direction (x direction) parallel to the normal line of the emission surface 22. In the present embodiment, the thickness of the splash regulating plates 51 and 52 is set to about 3 mm. The thicknesses of the splash guard plates 51 and 52 may be appropriately set as needed, and may be set to such an extent that the first spray 4a and the second spray 4b can be shielded.
The splash regulating plates 51 and 52 are rectangular in shape having long sides in the film width direction (y direction shown in fig. 15) and short sides in the film conveyance direction (z direction shown in fig. 15). In the present embodiment, the length of the long side of the splash guard plates 51 and 52 is about 1600mm corresponding to the film width, and the length of the short side of the splash guard plates 51 and 52 is about 50 mm.
As shown in fig. 16, the first splash guard plate 51 is disposed on one side with an ejection passage Ia through which the ink 4i is ejected. The second splash guard plate 52 is disposed on the other side with the injection passage Ia therebetween. The first splash regulating plate 51 is disposed above the injection passage Ia in the vertical direction, and the second splash regulating plate 52 is disposed below the injection passage Ia in the vertical direction. The first splash guard plate 51 and the second splash guard plate 52 are disposed at positions adjacent to each other with the injection passage Ia therebetween. A first shielding surface 51f extending in a direction orthogonal to the normal line of the emission surface 22 is formed on the first splash limiting plate 51, and a second shielding surface 52f extending in parallel with the first shielding surface 51f is formed on the second splash limiting plate 52.
As shown in fig. 15, the interval s1 (hereinafter referred to as "slit interval") between the first and second splash limiting plates 51 and 52 is larger than the diameter d2 of the injection hole 21 (see fig. 9). For example, the slit interval s1 is preferably set to a value in the range of 2mm to 10mm, and more preferably set to a value in the range of 2mm to 5 mm. The reason for this is that if the slit interval s1 is excessively reduced, the ink 4i may not pass through the slit interval s1, that is, the ink 4i may contact the first and second splash guard plates 51 and 52, and if the slit interval s1 is excessively increased, the first spray 4a may spread over a wide range from the injection hole 21. In the present embodiment, the slit interval s1 is set to about 5 mm. The diameter d2 of the injection hole 21 is set to about 1 mm.
The first fixed wall 53 includes an upper wall 53a and a side wall 53 b. The first fixed wall portion 53 is formed integrally with the first splash limiting plate 51. The upper wall portion 53a of the first fixed wall portion 53 is integrally connected to the upper end of the first splash restricting plate 51, and is inclined so as to be located upward toward the rear side (the (-x direction side). The side wall portions 53b of the first fixed wall portion 53 are integrally connected to the left and right side ends of the first splash-restricting plate 51 and the left and right side ends of the upper wall portion 53a, and extend so as to curve rearward after inclining so as to be positioned more upward toward the rear side (the (-x direction side). This can increase the support rigidity of the first splash regulating plate 51 and regulate the upward and lateral movement of the first spray 4 a.
For example, the first fixing wall portion 53 is fastened to the injection head 20A by a fastening member such as a bolt. This regulates the relative movement of the injection head 20A, the first fixed wall 53, and the first splash regulating plate 51 in the vertical direction (z direction), the width direction (y direction), and the front-rear direction (x direction).
The second fixed wall 54 includes a lower wall 54a and a side wall 54 b. The second fixed wall portion 54 is formed integrally with the second splash limiting plate 52. The lower wall portion 54a of the second fixed wall portion 54 is integrally connected to the lower end of the second splash guard plate 52, and extends rearward (-x direction). The side wall portions 54b of the second fixed wall portion 54 are integrally connected to the left and right side ends of the lower portion of the second splash restricting plate 52 and the left and right side ends of the lower wall portion 54a, and extend rearward to the rear end of the lower wall portion 54 a. This can increase the support rigidity of the second splash regulating plate 52, and regulate the downward and lateral movement of the first spray 4 a.
The second fixing wall portion 54 is fastened to the injection head 20A by a fastening member such as a bolt, for example. This regulates the relative movement of the injection head 20A, the second fixed wall 54, and the second splash regulating plate 52 in the vertical direction (z direction), the width direction (y direction), and the front-rear direction (x direction).
The shielding surface 50F on the optical film F10X side of the splash regulating member 50 is separated from the optical film F10X. For example, the distance between the shielding surface 50F on the optical film F10X side of the spatter regulating member 50 and the optical film F10X (hereinafter referred to as "shielding surface-optical film distance") is preferably 10mm or less, and more preferably 1mm or more and 5mm or less. The reason for this is that if the distance between the shielding surface and the optical film is excessively reduced, the spatter regulating member 50 may contact the optical film F10X, and if the distance between the shielding surface and the optical film is excessively increased, the movement of the second spray 4b may not be regulated by the shielding surface 50F. In the present embodiment, the distance between the shielding surface and the optical film is about 3 mm.
The shielding surface 50f on the emission surface 22 side of the splash guard 50 is separated from the emission surface 22. For example, the distance between the shielding surface 50f on the emission surface 22 side of the splash regulating member 50 and the emission surface 22 (hereinafter referred to as "shielding surface-emission surface distance") is set to a value of 3mm or more. In the present embodiment, the distance between the shielding surface and the emission surface is set to about 10 mm. The reason for this is that if the distance between the shielding surface and the emission surface is excessively reduced, there is a possibility that the movement of the second spray 4b cannot be restricted by the shielding surface 50f, and if the distance between the shielding surface and the emission surface is excessively increased, the slit interval s1 needs to be increased.
For example, the splash regulating member 50 is formed of a metal plate such as SUS, or a plastic plate such as an acrylic plate and a polypropylene plate (PP plate). In the present embodiment, the splash regulating member 50 is formed of an acrylic plate. Note that the splash regulating member 50 may be formed of a plate material that does not react with ink. This can suppress corrosion of the spatter limiting member 50 by the ink, and therefore can improve the corrosion resistance of the spatter limiting member 50.
According to the present embodiment, the splash regulating member 50 is provided between the emission surface 22 and the optical film F10X, the splash regulating member 50 is capable of shielding at least one of the first spray 4a splashed when the ink 4i is emitted from the emission hole 21 and the second spray 4b splashed when the ink 4i is ejected and landed on the optical film F10X, and the shielding surface 50F extending in the direction orthogonal to the normal line of the emission surface 22 is formed in the splash regulating member 50, so that the movement of the first spray 4a to the optical film F10X side and the movement of the second spray 4b to the emission surface 22 side can be regulated between the emission surface 22 and the optical film F10X, compared with the case where the ink 4i is directly emitted from the droplet emission device 20 without providing the splash regulating member 50, and therefore even when the ink 4i is emitted from the emission hole 21, the first spray 4a splashed or the ink 4i is ejected and landed on the optical film F10X, the second spray 4b is regulated, the first droplets 4a and the second droplets 4b are prevented from adhering to the region other than the defective position of the optical film F10X, and the yield of the product can be improved.
Further, the splash regulating member 50 includes the splash regulating plates 51 and 52 having thicknesses in the direction (x direction) parallel to the normal line of the emission surface 22, and thus the rigidity of the splash regulating plates 51 and 52 can be improved by adjusting the thicknesses of the splash regulating plates 51 and 52, and the first spray 4a and the second spray 4b can be effectively shielded.
Further, the splash guard 50 includes the first splash guard plate 51 disposed on one side across the ejection passage Ia through which the ink 4i is ejected, and the second splash guard plate 52 disposed on the other side across the ejection passage Ia, and thus the first and second splashes 4a and 4b that are splashed on both sides across the ejection passage Ia can be effectively blocked with a simple configuration.
Further, the first splash regulating plate 51 is disposed above the injection passage Ia in the vertical direction, and the second splash regulating plate 52 is disposed below the injection passage Ia in the vertical direction, so that the first spray 4a and the second spray 4b that are splashed up and down through the injection passage Ia can be effectively blocked with a simple configuration.
Further, since the first shielding surface 51F extending in the direction orthogonal to the normal line of the emission surface 22 is formed in the first splash guard 51, and the second shielding surface 52F extending in parallel to the first shielding surface 51F is formed in the second splash guard 52, the movement of the first spray 4a and the movement of the second spray 4b between the emission surface 22 and the optical film F10X toward the optical film F10X and the movement of the first spray 4a toward the emission surface 22 can be effectively restricted without being biased toward either one of the restrictions, as compared to the case where the first shielding surface 51F and the second shielding surface 52F intersect with each other.
Further, by making the slit interval s1 larger than the diameter d2 of the injection hole 21, the ink 4i can be prevented from contacting the first and second splash guard plates 51 and 52.
In the above embodiment, the first and second splash regulating plates 51 and 52 are disposed on both sides of the injection passage Ia, but the present invention is not limited thereto. For example, the splash guard plate may be disposed only below the injection passage Ia through which the ink 4i is injected in the vertical direction.
Thus, as compared with the case where the first splash regulating plate 51 and the second splash regulating plate 52 are disposed on both sides with the injection passage Ia therebetween, the first spray 4a and the second spray 4b that splash to the lower side than the injection passage Ia due to the influence of gravity can be selectively shielded while reducing the number of components and forming a simple configuration, thereby reducing the cost. In particular, when the dot diameter is large (when the amount of liquid droplets is large), when the optical film F10X is conveyed in the vertical direction, the amount of droplets splashed downward increases, and therefore, the actual benefit of disposing the splash regulating plate only below the ejection passage Ia increases.
(third embodiment)
The following describes a configuration of a labeling device according to a third embodiment of the present invention. Fig. 17 is a diagram showing a labeling device 304 according to the third embodiment, and is a diagram including a cross section corresponding to fig. 8. In the present embodiment, the same components as those of the first embodiment and the second modification of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
In the first embodiment, as shown in fig. 13, an example is described in which the marking device 4 includes the droplet discharge device 20, the shielding plate 30, the fixing member 40, and the suction device 60, and in the second modification of the first embodiment, as shown in fig. 11, in a configuration in which the fixing member 140 and the shielding plate 130 are integrally formed of the same member, an example is described in which the shielding plate 130 is separated from the discharge surface 22. In contrast, in the present embodiment, as shown in fig. 17, the marking device 304 includes the droplet ejection device 20, the fixing member 340, and the suction device 360.
The fixing member 340 is integrally formed with the shutter 330 from the same member. The fixing member 340 is fixed to the ejection head 20A together with the shielding plate 330. The fixing member 340 includes the shielding plate 330 and the side wall portion 141. For example, the fixing member 340 is formed of a metal plate of SUS or the like.
The shielding plate 330 is separated from the exit surface 22. Specifically, the second main surface 335 of the shielding plate 330 is arranged forward (in the + x direction) of the emission surface 22. By separating the shielding plate 330 from the emission surface 22, the shielding plate 330 also functions as the above-described splash regulating member. Specifically, by separating the shield plate 330 from the emission surface 22, the second main surface 335 (surface on the emission surface 22 side) of the shield plate 330 restricts the first droplet 4a from moving toward the optical film F10X, and the first main surface 332 (surface on the optical film F10X side) of the shield plate 330 restricts the second droplet 4b from moving toward the emission surface 22.
A tapered portion 336 is formed at the edge of the opening 331 of the shielding plate 330 on the emission surface 22 side, and the tapered portion 336 has an inclined surface 336a inclined with respect to the normal line of the emission surface 22 so as to face the emission hole 21. The edge of the opening 331 of the shield plate 330 on the emission surface 22 side is the boundary between the inner wall surface 331a of the opening 331 and the second main surface 335 of the shield plate 330.
In the present embodiment, the guide roller 7 is provided in contact with the optical film F10X. The droplet discharge device 20 according to the present embodiment is disposed so as to face the guide roller 7 with the optical film F10X interposed therebetween while the optical film F10X is conveyed. The droplet ejection apparatus 20 ejects the ink 4i from the optical film F10X on the side opposite to the position in contact with the guide roller 7 (see fig. 9).
The optical film F10X is preferably stretched over the outer peripheral surface of the guide roller 7 at an angle ranging from 40 ° to 130 ° (hereinafter referred to as "wrap angle θ"). The wrap angle is a value indicating an angular range of a portion of the optical film F10X that contacts the outer circumferential surface of the guide roller 7 in the circumferential direction, as the center angle of the guide roller 7.
The reason is that if the wrap angle θ is smaller than 40 °, the optical film F10X is likely to slide on the outer peripheral surface of the guide roller 7, and scratches and the like may occur in the optical film F10X, whereas if the wrap angle θ is larger than 130 °, for example, air bubbles are likely to enter between the surface protection film and the polarizing film.
When the tension applied to the optical film F10X is small, the wrap angle θ is preferably set to a value greater than 90 °, and more preferably 95 ° or more. The smaller the tension applied to the optical film F10X, the more likely the optical film F10 to suffer from chatter vibration, but by setting the hugging angle θ to 95 ° or more, chatter vibration occurring in the optical film F10X can be suppressed even when the tension applied to the optical film F10X is small. On the other hand, when the tension applied to the optical film F10X is large, the hugging angle θ is preferably smaller than 90 °, and more preferably 85 ° or smaller. Thus, even when the tension applied to the optical film F10X is large, the optical film F10X can be prevented from coming into close contact with the outer peripheral surface of the guide roller 7.
The conveying speed of the optical film F10X is usually a value in the range of 9m/min to 50 m/min. The tension applied to the optical film F10X was set to a value in the range of 400N to 1500N inside the drying oven, and to a value in the range of 200N to 500N outside the drying oven. The width of the optical film F10X was set to a value in the range of 500mm to 1500mm, and the thickness of the optical film F10X was set to a value in the range of 10 μm to 300 μm. The larger the width of the optical film F10X and the thinner the thickness of the optical film F10X, the more likely chatter vibration occurs.
For example, the outer diameter of the guide roller 7 is preferably set to a value in the range of 100mm to 150 mm. The reason for this is that, when the outer diameter of the guide roller 7 is increased, the area of the optical film F10X that is in contact with the outer peripheral surface of the guide roller 7 facing the wrap angle θ is increased, and therefore chatter occurring in the optical film F10X can be suppressed, but when the outer diameter of the guide roller 7 is excessively increased, the above-described scratches, the entry of bubbles, and the like are likely to occur in the optical film F10X.
For example, the roundness of the guide roller 7 is preferably set to a value of 1.0mm or less, and more preferably 0.5mm or less. The reason is that the smaller the roundness of the guide roller 7 is, the more the vibration of the optical film F10X in contact with the guide roller 7 can be suppressed.
For example, the surface roughness (maximum roughness Ry) of the outer peripheral surface of the guide roller 7 is preferably set to a value of 100s or less, and more preferably to a value of 25s or less. The reason for this is that if the surface roughness (maximum roughness Ry) of the outer peripheral surface of the guide roller 7 is too large, the above-described scratches, the intrusion of air bubbles, and the like are likely to occur in the optical film F10X.
In addition, from the viewpoint of further effectively suppressing the chatter vibration generated in the optical film F10X, guide rollers that come into contact with the optical film F10X may be additionally provided on the upstream side and the downstream side of the guide roller 7. The additional guide roller also has a wrap angle with the optical film F10X.
The guide roller 7 can advance and retreat in a direction V2 intersecting the conveying direction V1 of the optical film F10X. For example, the guide roller 7 can be moved in an oblique direction such as a front lower direction and a rear upper direction by mounting a cylinder mechanism or the like on the guide roller 7. This can improve workability from the viewpoints of paper-passing properties, joint properties, and head beauty.
Specifically, from the viewpoint of the paper passing property, when the optical film F10X is conveyed (passed) from a state in which the optical film F10X is not conveyed (non-passed state) in the conveying line 9, the distance between the marking device 304 and the guide roller 7 is increased, and the workability is improved.
Next, a description will be given based on the viewpoint of the joint. When the optical films F10X are connected by tapes or the like at the time of replacement of the stock rolls R1 and R2, a splice occurs. In the optical film F10X, the thickness of the tab portion is larger than that of a normal position (thickness of the tab-free portion). In this case, by making the guide roller 7 movable, the optical film F10X can be conveyed on the conveying line 9 so as to avoid contact between the joint portion and the marking device 304, and workability improves.
The head beauty means cleaning of the head, and the guide roller 7 is movable to enlarge the working space, thereby improving the workability.
The droplet ejection apparatus 20 may be configured to be capable of moving forward and backward in a direction (for example, a front-rear direction) intersecting the conveyance direction V1 of the optical film F10X.
In fig. 17, reference symbol Va denotes a portion (hereinafter referred to as "opposed portion") where the fixing member 340 is opposed to the guide roller 7, including an ejection path Ia (see fig. 9) through which the ink 4i is ejected.
The suction device 360 includes a first suction mechanism 361 disposed on one side with the opposing portion Va interposed therebetween, and a second suction mechanism 362 disposed on the other side with the opposing portion Va interposed therebetween. That is, the suction mechanisms 361 and 362 are disposed on both sides with the opposing portion Va interposed therebetween. Specifically, the first suction mechanism 361 is disposed above the opposing portion Va in the vertical direction, and the second suction mechanism 362 is disposed below the opposing portion Va in the vertical direction.
The first suction mechanism 361 has a suction surface 361f inclined forward and downward so as to face the opposing portion Va. A suction surface 362f inclined rearward and downward so as to face the opposing portion Va is formed in the second suction mechanism 362. Suction holes (not shown) for sucking the first droplets 4a and the second droplets 4b are formed in the suction surfaces 361f and 362f, respectively. The suction mechanisms 361 and 362 are disposed so that the suction surfaces 361F and 362F enter a gap between the first main surface 332 of the shutter 330 and the optical film F10X that is in contact with the guide roller 7.
According to the present embodiment, the tapered part 336 is formed at the edge part of the opening 331 of the shielding plate 330 on the emission surface 22 side, and the tapered part 336 has the inclined surface 336a inclined with respect to the normal line of the emission surface 22 so as to face the emission holes 21, and the first spray 4a can be received by the inclined surface 336a, so that the first spray 4a can be prevented from being broken. If the tapered portion 336 is not formed at the edge portion of the opening 331 of the shield plate 330 on the emission surface 22 side, the boundary portion between the inner wall surface 331a of the opening 331 and the second main surface 335 of the shield plate 330 forms a corner portion of about 90 ° in cross-sectional view, and therefore the first droplets 4a splashed when the ink 4i is emitted from the emission hole 21 may be broken at the corner portion.
Further, the suction device 360 includes the first suction mechanism 361 disposed on one side with the opposing portion Va interposed therebetween and the second suction mechanism 362 disposed on the other side with the opposing portion Va interposed therebetween, and can efficiently suck the first mist 4a and the second mist 4b splashed on both sides with the opposing portion Va interposed therebetween with a simple configuration.
Further, the first suction mechanism 361 is disposed above the opposing portion Va in the vertical direction, and the second suction mechanism 362 is disposed below the opposing portion Va in the vertical direction, so that the first spray 4a and the second spray 4b that are splashed upward and downward across the opposing portion Va can be efficiently sucked with a simple configuration.
Further, the suction mechanisms 361 and 362 are arranged so that the suction surfaces 361F and 362F enter the gap between the first main surface 332 of the shielding plate 330 and the optical film F10X in contact with the guide roller 7, and the suction holes can be brought close to the discharge passage Ia, so that the first spray 4a and the second spray 4b splashed between the discharge surface 22 and the optical film F10X can be efficiently sucked. By bringing the suction holes close to the landing positions of the ink 4i, the second droplets 4b can be sucked more effectively.
Further, since the droplet ejection apparatus 20 is disposed so as to face the guide roller 7 in contact with the optical film F10X via the optical film F10X while the optical film F10X is being conveyed, and the droplet ejection apparatus 20 and the fixing member 340 can be disposed in a state in which chatter occurring in the optical film F10X is suppressed, the distance between the shielding plate 330 of the fixing member 340 and the ejection surface 22 can be reduced as much as possible in a range in which the shielding plate 330 does not contact the optical film F10X, and the spreading range of the spray 4a can be reduced as much as possible.
In addition, the distance between the suction surface of the suction mechanism 361, 362 and the opposing portion Va is reduced as much as possible within a range in which the suction mechanism 361, 362 does not suck the optical film F10X, and the droplets 4a, 4b can be absorbed to the maximum.
Even in the case where the fixing member 340 (shielding plate 330) is not provided, the spread of the spray 4a can be minimized by reducing the distance between the emission hole 21 of the emission head 20A and the optical film F10X as much as possible within the range where the emission surface 22 does not contact the optical film F10X.
The defect inspection system 310 according to the present embodiment further includes the guide roller 7 that contacts the optical film F10X, and the marking device 304 is disposed to face the guide roller 7 with the optical film F10X interposed therebetween, and ejects the ink 4i from the side of the optical film F10X opposite to the position where the guide roller 7 contacts.
According to the present embodiment, since the above-described guide roller 7 is further provided, the droplet discharge device 20 and the fixing member 340 can be arranged in a state in which chatter vibration generated in the optical film F10X is suppressed, and therefore, the distance between the shielding plate 330 of the fixing member 340 and the discharge surface 22 can be reduced as much as possible within a range in which the shielding plate 330 does not contact the optical film F10X, and the spreading range of the mist 4a can be reduced as much as possible.
In the present embodiment, an example in which the shielding plate 330 is formed in a flat plate shape, that is, the first main surface 332 of the shielding plate 330 is formed in a plane parallel to the yz plane has been described, but the present invention is not limited thereto. For example, the portion of the shield plate 330 facing the guide roller 7 may be formed in an arc shape when viewed in cross section so as to be recessed to the side opposite to the guide roller 7, that is, the first main surface 332 of the shield plate 330 may be formed in an arc shape so as to extend along the outer peripheral surface of the guide roller 7. Thus, compared to the case where the shield plate 330 is formed in a flat plate shape, the distance between the shield plate 330 and the optical film F10X can be further reduced, and therefore the diffusion range of the mist 4a can be further effectively reduced.
The present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.
In the above embodiment, the marking device has been described as an example in which the optical film F10X conveyed along the conveying line 9 in the direction parallel to the vertical direction is ejected with the ink 4i from the direction orthogonal to the vertical direction, but the marking device is not limited to this. For example, the marking device may discharge the ink 4i from below to the optical film F10X conveyed in the horizontal direction. In this case, as compared with the case where the marking device ejects the ink 4i from above with respect to the optical film F10X conveyed in the horizontal direction, it is possible to suppress the ink 4i from naturally dropping from the ejection hole 21 due to the influence of gravity.
In the above embodiment, the description has been given of an example in which the splash regulating plate and the suction mechanism are disposed on both sides with the ejection passage Ia through which the ink 4i is ejected from the marking device interposed therebetween, but the present invention is not limited to this. For example, when the droplets of the ink 4i are concentrated on one side through the discharge passage Ia by the direction of the wind generated by the conveyance of the optical film F10X or the direction of the discharge passage Ia of the ink 4i, the splash regulating plate or the suction mechanism may be disposed only on the one side.
In the above-described embodiment, the droplet discharge device 20 shown in fig. 7 and the like has been described as an example in which a plurality of discharge heads 20A having a plurality of discharge holes 21 are arranged so as to cover the printing range in the width direction of the optical film F10X, but the present invention is not limited to this. For example, the droplet discharge device 20 including the single discharge head 20A having 1 to 3 discharge holes 21 may discharge the ink 4i to the defective position on the optical film F10X and perform printing by moving in the width direction and the conveying direction of the optical film F10X based on the defect position information from the control device 6. The splash regulating plates 51 and 52 and the suction mechanisms 361 and 362 may also be moved to the defective position together with the droplet discharge device 20, thereby preventing the optical film F10X from being contaminated by the droplets of the ink 4 i.
The defect inspection system 10 is described by taking an example of a configuration provided as a part of the film manufacturing apparatus 1, but is not limited thereto. The defect inspection system 10 may be provided separately from the film manufacturing apparatus 1. For example, the film manufacturing apparatus 1 may not include the defect inspection system 10, and the optical film F10X manufactured by the film manufacturing apparatus 1 may be wound around a core material by the winding section 8 to be a take-up roll R2 of the optical film F10X, and then may be conveyed to the next step, and the defect inspection system 10 may be provided in a part of the facility of the next step.
The film to which the present invention is applied is not limited to the optical film such as the polarizing film, the retardation film, and the brightness enhancement film, and the present invention can be widely applied to a film capable of performing printing by a labeling device.
While the preferred embodiments of the present invention have been described above with reference to the drawings, it is needless to say that the present invention is not limited to the examples. The shapes, combinations, and the like of the respective constituent members shown in the above examples are merely examples, and various modifications can be made in accordance with design requirements and the like within a scope not departing from the gist of the present invention.

Claims (9)

1. A marking device capable of marking information by ejecting a droplet to an optical film,
the labeling device is provided with:
a droplet discharge device having a discharge surface on which discharge holes for discharging the droplets toward the optical film are formed; and
a suction device that is provided between the emission surface and the optical film and can suck the spray splashed in a process from the emission of the liquid droplets from the emission hole to the landing of the liquid droplets on the optical film,
the suction device includes a second suction mechanism disposed on the other side of the discharge passage from which the liquid droplets are discharged,
the injection passage is along a direction intersecting with a vertical direction,
the second suction means is disposed below the injection passage in the vertical direction,
the second suction means has a shape extending obliquely upward and forward such that a suction surface faces the injection passage,
the air speed when the suction device sucks the spray is a value in the range of 4m/sec to 20 m/sec.
2. The annotating device of claim 1,
the suction device is further provided with a first suction mechanism,
the first suction means is disposed on one side of the second suction means with the injection passage therebetween,
the first suction mechanism is disposed above the injection passage in the vertical direction.
3. The annotating device of claim 1,
the droplets include at least one of a first droplet that splashes when the droplets are ejected from the ejection hole and a second droplet that splashes when the droplets land on the optical film.
4. The annotating device of claim 1,
the suction device is only the second suction mechanism.
5. The annotating device of claim 1,
the marking device further includes a shielding member provided on the ejection surface and capable of shielding droplets splashed when the droplets are ejected from the ejection hole,
the shielding member has an opening that opens at a position facing the emission hole and has an inner wall surface that shields the spray that splashes in a direction intersecting a normal line of the emission surface.
6. The annotating device of claim 1,
the marking device further includes a splash-restraining member that is provided between the emission surface and the optical film and that is capable of shielding a spray splashed during a period from when the liquid droplet is emitted from the emission hole to when the liquid droplet is landed on the optical film,
the splash guard has a shield surface extending in a direction intersecting a normal line of the emission surface.
7. The annotating device of any one of claims 1 to 6,
the droplet discharge device is configured to face a guide roller that is in contact with the optical film through the optical film while the long strip-shaped optical film is being conveyed, and to discharge the droplets from a side of the optical film opposite to a position where the optical film is in contact with the guide roller.
8. A defect inspection system includes:
a conveying line for conveying the long strip-shaped film;
a defect inspection device that inspects defects of the film conveyed by the conveying line; and
the marking device according to any one of claims 1 to 7, which is capable of marking information by ejecting a droplet to a position of a defect according to a result of the defect inspection.
9. A film manufacturing method comprising a process of labeling using the defect inspection system of claim 8.
CN201810170418.5A 2017-03-03 2018-02-28 Marking device, defect inspection system, and film manufacturing method Active CN108535274B (en)

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CN108535274A (en) 2018-09-14
JP6934733B2 (en) 2021-09-15

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