WO2014188640A1 - グラビアキス塗工装置 - Google Patents
グラビアキス塗工装置 Download PDFInfo
- Publication number
- WO2014188640A1 WO2014188640A1 PCT/JP2014/001407 JP2014001407W WO2014188640A1 WO 2014188640 A1 WO2014188640 A1 WO 2014188640A1 JP 2014001407 W JP2014001407 W JP 2014001407W WO 2014188640 A1 WO2014188640 A1 WO 2014188640A1
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- WIPO (PCT)
- Prior art keywords
- small
- paint
- gravure roll
- diameter
- storage space
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0813—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for supplying liquid or other fluent material to the roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0804—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the material being applied without contact with the roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0808—Details thereof, e.g. surface characteristics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
- B41F9/06—Details
- B41F9/08—Wiping mechanisms
- B41F9/10—Doctors, scrapers, or like devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0817—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for removing partially liquid or other fluent material from the roller, e.g. scrapers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0839—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being unsupported at the line of contact between the coating roller and the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
- B05C11/047—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades provided with end dams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
- B41F31/027—Ink rail devices for inking ink rollers
Definitions
- the present invention relates to a gravure kiss coating apparatus, and in particular, to a gravure kiss coating apparatus provided with a small-diameter gravure roll.
- a gravure kiss coating device is a device that coats a base material by rotating and rotating a gravure roll with paint applied against a flat sheet-like base material that runs while floating while being pulled. .
- the gravure kiss coating apparatus unlike a general gravure coating apparatus, the substrate is coated without being sandwiched between the gravure roll and the impression cylinder. For this reason, the gravure kiss coating apparatus is suitable for thin film coating because it can apply a coating thinly by giving a predetermined speed difference to the conveyance speed of the substrate.
- This type of coating apparatus including a small-diameter gravure roll is disclosed in, for example, Patent Document 1 and Patent Document 2.
- the gravure coating machine of Patent Document 1 is provided with a gravure roll having a diameter of about 20 mm to about 50 mm.
- the coating apparatus of Patent Document 2 includes a gravure roll having an outer diameter of about 40 mm to about 200 mm.
- the coated substrate is subsequently subjected to a drying process in which the paint is fixed by passing it through a dryer. Since it takes a certain amount of time to dry the paint, the dryer must have a larger space than the gravure coater. This is especially true when the running speed of the substrate is high.
- the coating performance may be adversely affected. That is, in the gravure kiss coating apparatus, the paint that is thinly adhered to the outer peripheral surface of the gravure roll is once exposed to the outside air before being applied to the substrate. Therefore, there is a possibility that the coating is dried before being applied to the base material and the coating becomes unstable.
- Patent Document 3 If it is a doctor blade with an angle (Natural Angle) as in Patent Document 3, it is possible to easily press the vicinity of the base material. It has the disadvantage that it is pushed up and the paint is supplied in excess.
- an object of the present invention is to provide a gravure kiss coating apparatus that can be applied stably without damaging the coating performance even with a paint that is easy to dry, and is advantageous for high-speed operation.
- the disclosed gravure kiss coating apparatus is arranged to extend along the small-diameter gravure roll having a cylindrical small-diameter gravure roll having an outer diameter in a range of 45 mm to 150 mm and having an application portion on an outer peripheral surface, And a coating material supply device for supplying the coating portion with the coating material. While controlling the rotation of the small-diameter gravure roll, the coating unit is applied to the base material by pressing the application portion against the sheet-like base material that runs while being pulled in a straight line.
- the coating material supply device constitutes a doctor blade extending along the small-diameter gravure roll and a storage space for storing the coating material and supporting the doctor blade while the tip is in contact with the application portion toward the contact position with the base material And a paint supply path for supplying paint to the storage space.
- the tip of the doctor blade is disposed so as to contact the application portion from a reverse angle, that is, the direction opposite to the rotation direction of the small-diameter gravure roll, and the rotation angle is within 90 ° from the tip of the doctor blade. Within the range, the small-diameter gravure roll can come into contact with the substrate.
- the outer diameter of the small-diameter gravure roll is small, and before the small-diameter gravure roll rotates 90 ° from the tip of the doctor blade that thinly attaches the coating material to the coating portion,
- the paint can be applied to. Therefore, even a paint that is easy to dry can be applied to the substrate instantly, so that the influence on the coating performance due to drying before application can be effectively suppressed.
- the doctor blade since the tip of the doctor blade is arranged so as to contact the application part from the direction opposite to the rotation direction of the small-diameter gravure roll, the doctor blade can be effectively scraped off without being pushed up by the hydraulic pressure. It can be removed and can be adhered stably and with high accuracy even during high-speed operation.
- the case is supported by a sealing blade that extends along the small-diameter gravure roll with the tip in contact with the application portion that is away from the contact position with the substrate.
- the storage space is hermetically sealed so that the doctor blade and the seal blade are aligned vertically.
- the gravure kiss coating apparatus can be applied to a substrate traveling in various directions such as a vertical direction and a horizontal direction in a state where the gravure kiss coating apparatus is placed horizontally, the versatility is excellent.
- the case is connected to the doctor blade and defines the storage space
- the downstream side wall portion is opposed to the downstream side wall portion
- the storage blade is connected to the seal blade.
- an upstream side wall portion that divides.
- the paint supply path has one end of a connection port close to the upstream side wall, a liquid supply pipe that sends the paint to the storage space, and one end of the connection port close to the downstream side wall, so that the paint is supplied from the storage space.
- return liquid piping is set to 1/2 or more of the space
- two return pipes are installed at positions corresponding to both ends of the small-diameter gravure roll, and one liquid supply pipe is installed in the middle of these return pipes. Good.
- the paint can be distributed and supplied to the entire area of the application part while smoothing the flow of the paint in the storage space, so that more stable coating can be realized.
- the gravure kiss coating apparatus of the present invention even a paint that is easy to dry can be stably coated without impairing the coating performance, so that the coating line can be made compact and the production efficiency can be improved.
- FIG. 3 is a schematic sectional view taken along line BB in FIG. 2. It is the schematic seen from the direction of arrow C of FIG. It is a schematic sectional drawing which shows a modification. It is the schematic which shows a modification.
- FIG. 1 and 2 show an example of a gravure kiss coating apparatus 1 (hereinafter also simply referred to as a coating apparatus 1) to which the present invention is applied.
- a symbol S is a base material to be painted.
- the substrate S is made of a flexible sheet-like member made of synthetic resin, metal, or the like, and has a long strip shape.
- the base material S is unwound from one end side, and the other end side is wound while the traveling direction is guided by a guide roller or the like. Thereby, the base material S is traveling at a high speed in a certain direction in the direction indicated by the white arrow in FIG.
- a series of coating and drying processes are performed on the traveling substrate S, and FIG. 1 shows an area where the coating process is performed.
- the base material S is linearly seen from the side surface, for example, by being wound around a pair of guide rollers arranged at intervals in the traveling direction.
- the vehicle is running under a certain tension.
- the coating apparatus 1 is disposed so as to contact not the base material S supported by an impression cylinder or the like but a flat base material S that travels in a floating state.
- the coating apparatus 1 includes a small-diameter gravure roll 10 and a paint supply apparatus 30.
- the small-diameter gravure roll 10 is a columnar member that is longer than the width of the substrate S, and is rotatably supported by a support member (not shown) via shaft portions 11 provided at both ends thereof.
- the small-diameter gravure roll 10 is controlled to rotate in a predetermined rotation direction around the rotation axis J at a rotation speed interlocked with the travel of the substrate S.
- Rotation direction of the small-diameter gravure roll 10 may be either forward rotation or reverse rotation, and can be arbitrarily set according to use conditions. In the case of this coating apparatus 1, it sets so that it may rotate in the opposite direction to the running direction of the base material S in a contact position with the base material S (reverse system).
- the outer diameter of the small diameter gravure roll 10 is set within a range of 45 mm to 150 mm. That is, if it is smaller than 45 mm, it is difficult to dimensionally place the coating material supply device 30 in a predetermined lateral direction as will be described later. If it is larger than 150 mm, the surface of the gravure roll is too much relative to the substrate S. Because it enters an acute angle, it is difficult to spread the paint thinly, and a clean painted surface cannot be obtained. In the case of a paint that is easy to dry, even if the paint supply device 30 is placed in a predetermined horizontal position, there is a possibility that the effect of suppressing drying before painting cannot be obtained satisfactorily.
- a coating portion 12 On the outer peripheral surface of the small-diameter gravure roll 10, there is formed a coating portion 12 provided with cells of a predetermined pattern such as a lattice or diagonal lines.
- the coating material is supplied from the coating material supply device 30 to the application unit 12.
- the paint supply device 30 includes a case 31, a doctor blade 32 and a seal blade 33 constituting the main body portion, a cylindrical liquid supply pipe 34 constituting the paint supply path, and a return pipe.
- a liquid pipe 35 is provided.
- the main body portion of the coating material supply device 30 has a long and narrow prismatic shape, and is disposed adjacent to the small-diameter gravure roll 10 so as to extend along the small-diameter gravure roll 10.
- the case 31 includes an elongated main case 36 having a U-shaped cross section, side covers 37 attached to both ends of the main case 36, and the like.
- a storage space 38 for storing paint is formed inside the case 31.
- the main case 36 includes an elongated base plate portion 36 a disposed opposite to the small-diameter gravure roll 10 and a longer one of the base wall portions 36 a.
- the downstream side wall part 36b and the upstream side wall part 36c which protrude toward the small-diameter gravure roll 10 side while facing each other are provided.
- the downstream side wall portion 36b and the upstream side wall portion 36c are in the shape of an elongated strip having the same shape and the same size.
- the side cover 37 is fastened and fixed to each end of the main case 36 and closes the end surface of the main case 36.
- an arc-shaped seal portion 37 a that can be in close contact with the outer peripheral surface of the small-diameter gravure roll 10 is provided.
- the side cover 37 is slidable along the downstream side wall portion 36b and the upstream side wall portion 36c, and is fixed in a state where the seal portion 37a is pressed against the outer peripheral surface of the small-diameter gravure roll 10.
- the doctor blade 32 is attached to the protruding end of the downstream side wall portion 36b.
- the protruding end surface of the downstream side wall portion 36b is an inclined surface in which the edge on the upstream side wall portion 36c side relatively protrudes, and the doctor blade 32 is attached along the protruding end surface.
- the doctor blade 32 is an elongated blade-like member having a blade edge formed on one long side portion.
- the other long side portion of the doctor blade 32 is bolted to the protruding end surface of the downstream side wall portion 36b while being pressed by the support bar 39.
- the tip 32a side of the doctor blade 32 having the blade edge protrudes obliquely from the downstream side wall part 36b toward the upstream side wall part 36c.
- the protruding tip 32 a of the doctor blade 32 is in contact with the coating portion 12 formed on the outer peripheral surface of the small-diameter gravure roll 10.
- the seal blade 33 is a member similar to the doctor blade 32, and is attached to the protruding end of the upstream side wall portion 36c.
- the seal blade 33 is made of synthetic resin
- the doctor blade 32 is made of metal.
- the downstream side wall part 36 b and the upstream side wall part 36 c are arranged symmetrically with respect to a reference line K passing through the center between them. .
- the front end side of the seal blade 33 protrudes obliquely from the upstream side wall portion 36 c toward the downstream side wall portion 36 b, and the front end of the protruded seal blade 33 is an application portion formed on the outer peripheral surface of the small-diameter gravure roll 10. 12 is in contact.
- the doctor blade 32 and the seal blade 33 are arranged in a letter C shape whose front end side is narrowed, and the doctor blade 32 is before coating toward the contact position P with the substrate S.
- the tip 32 a is in contact with the application part 12, and the tip of the sealing blade 33 is in contact with the coated application part 12 that is away from the contact position P with the substrate S.
- a storage space 38 for storing paint is formed in the paint supply device 30 by closing both ends of the main case 36 with both side covers 37. Further, the storage space 38 is sealed so that the doctor blade 32, the seal blade 33, and both side covers 37 are in contact with the small-diameter gravure roll 10 so as not to leak.
- the coating apparatus 1 can be placed horizontally in which the small-diameter gravure roll 10 and the coating material supply apparatus 30 are arranged in a substantially horizontal direction.
- a sufficient space can be secured on the opposite side of the small-diameter gravure roll 10 from the coating material supply device 30, so that the coating device 1 is applied to the substrate S traveling in the vertical direction or the oblique direction. Can do.
- this coating apparatus by devising the configuration of the small-diameter gravure roll 10 and the coating material supply apparatus 30, it can be placed horizontally on the lower side of the base material S traveling in a substantially horizontal direction.
- the uppermost end of the coating material supply apparatus 30 including the downstream side wall portion 36b, the support bar 39, bolts, and the like.
- the coating material supply apparatus 30 is formed so that it may be located below the tangent line T1 (it overlaps with the base material S in FIG. 3) which contact
- the coating material supply apparatus 30 is formed so that the lowermost end of the coating material supply apparatus 30 is also located above the tangent line T2 in contact with the lower end of the small-diameter gravure roll 10. That is, both the uppermost end and the lowermost end of the coating material supply device 30 are positioned with a gap between a pair of tangents T1 and T2 that are in contact with the upper end and the lower end of the small-diameter gravure roll 10.
- this coating apparatus 1 it is also possible to place the coating material supply apparatus 30 on the upper side of the base material S that travels in a substantially horizontal direction.
- the doctor blade 32 and the seal blade 33 are arranged in the vertical direction in accordance with the rotation direction of the small-diameter gravure roll 10. .
- liquid supply pipe 34 and the liquid return pipe 35 are connected to the base wall portion 36a.
- one liquid supply pipe 34 and two liquid return pipes 35 are installed.
- the liquid return pipes 35 are arranged one by one at both ends of the storage space 38 corresponding to the both ends of the small-diameter gravure roll 10. , 35 in the middle.
- the portion on the base wall portion 36a side of the liquid feeding pipe 34 extends obliquely downward from the base wall portion 36a.
- a portion of the return pipe 35 on the base wall portion 36a side extends from the base wall portion 36a in a substantially horizontal direction, then bends upward once, and rises one step higher than the storage space 38 and extends in the horizontal direction. Yes.
- the other ends of the liquid supply pipe 34 and the liquid return pipe 35 are connected to a storage tank 40 that stores the paint.
- the paint in the storage tank 40 is sent to the storage space 38 through the liquid supply pipe 34 by the pump 41.
- the paint in the storage space 38 is returned to the storage tank 40 through the liquid return pipe 35.
- the coating material is circulated and supplied from the storage tank 40 to the storage space 38 through the liquid supply pipe 34 and the liquid return pipe 35.
- the inside of the small storage space 38 is always kept in a state filled with paint. Therefore, the application part 12 facing the inside of the storage space 38 is always in contact with the paint. Therefore, the coating material is stably supplied to the application unit 12 that passes through the small-diameter gravure roll 10 as it rotates.
- each of the liquid supply pipe 34 and the liquid return pipe 35 is determined such that the interval I between the inner surfaces facing the downstream side wall part 36 b and the upstream side wall part 36 c (reservation space 38), the lower end of the connection port 34a of the liquid supply pipe 34 is close to the inner surface of the upstream side wall portion 36c, and is similarly located.
- the upper end of the connection port 34a is disposed so as to be close to the downstream side wall 36b.
- connection port 34a having a relatively large area opens with respect to the small storage space 38, the paint can be efficiently circulated in a state where the flow rate of the paint is low. Furthermore, since the lower end of the connection port 34a of the liquid feeding pipe 34 is arranged close to the upstream side wall part 36c and the upper end of the connection port 34a of the liquid return pipe 35 is arranged close to the downstream side wall part 36b, Generation of stagnation and turbulence inside the storage space 38 can be effectively suppressed.
- the paint flows in from the center in the longitudinal direction of the storage space 38 and the paint flows out from both ends of the storage space 38, the flow of the paint becomes smooth inside the storage space 38, and turbulence is effectively suppressed. it can. Since the total cross-sectional area of the liquid return pipe 35 is larger than that of the liquid feed pipe 34, air can be efficiently removed from the storage space 38.
- a paint guiding wall 51 that guides the circulation of the paint may be provided inside the storage space 38.
- a paint guide wall 51 having an L-shaped cross section for partitioning between the connection port 34 a of the liquid feeding pipe 34 and the connection port 35 a of each liquid return pipe 35 is provided at each of both ends of the storage space 38.
- Each paint guiding wall 51 is formed in the central portion of the storage space 38 from the inner surface of the base wall portion 36a between the connection port 34a of the liquid feeding pipe 34 and the connection port 35a of each liquid return pipe 35 toward the small-diameter gravure roll 10 side.
- a guide portion 51b extending continuously from the protruding end of the base portion 51a toward each end of the storage space 38. Both side edges of the base portion 51a and the guide portion 51b are formed on the downstream side wall portion 36b and It connects with the upstream side wall part 36c.
- the paint that has flowed into the storage space 38 flows toward the small-diameter gravure roll 10 and then splits into left and right and flows along the small-diameter gravure roll 10 toward each end thereof. Thereafter, the paint is guided to the end of the small-diameter gravure roll 10 by each paint guide wall 51 and then flows out from the storage space 38, so that the paint can be circulated effectively and smoothly inside the storage space 38.
- doctor blade placement The distal end 32 a of the doctor blade 32 is in contact with the application unit 12 from the direction opposite to the rotation direction of the small-diameter gravure roll 10. Specifically, as shown in FIG. 4, when viewed from the direction of the rotation axis J, the contact point is in contact with the contact point on the traveling side in the rotation direction of the small-diameter gravure roll 10 with respect to the contact point between the tip 32 a of the doctor blade 32 and the coating unit 12.
- the doctor blade 32 is arranged so that the angle between the tangent line T3 and the doctor blade 32 is an acute angle ⁇ .
- the doctor blade 32 By arranging the doctor blade 32 in this way, the paint can be attached to the small-diameter gravure roll 10 with high accuracy and thinness. That is, the doctor blade 32 has a function of scraping off excess paint adhering to the application part 12, but the entire cutting edge of the application part 12 is brought into contact with the application part 12 in the direction opposite to the traveling direction. The excess paint can be scraped off smoothly without leakage.
- the coating material supply device 30 can be placed horizontally on the lower side of the base material S that runs substantially horizontally.
- the contact position P position where application is performed
- the contact position P where the substrate S and the substrate S are in contact with each other can be positioned within a range of 90 ° or less from the tip 32a of the doctor blade 32.
- the paint scraped off by the doctor blade 32 and thinly adhered to the application part 12 is applied to the substrate S in an extremely short time. Accordingly, even when a paint that is easy to dry is applied thinly, it can be stably applied without impairing the coating performance.
- the gravure kiss coating apparatus 1 according to the present invention is not limited to the above-described embodiment, and includes other various configurations.
- the paint supply device 30 has only one of its uppermost end and lowermost end positioned between a pair of tangents T ⁇ b> 1 and T ⁇ b> 2 that are in contact with the upper and lower ends of the corresponding small-diameter gravure roll 10. You may make it. Even in this case, it is possible to deal with a paint that is easy to dry, and it is possible to apply to the base material S that travels in various directions in a state in which the paint is placed horizontally.
- the storage space 38 is not necessarily limited to a sealed type.
- An open type may be used.
- the paint supply device 30 must be placed vertically so as to be positioned below the small-diameter gravure roll 10 because it cannot be placed horizontally.
- the mounting position and mounting angle of the seal blade 33 can be changed according to the specifications.
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Abstract
Description
小径グラビアロール10は、基材Sの幅よりも長い円柱状の部材であり、その両端に設けられた軸部11を介して、不図示の支持部材に回転自在に支持されている。小径グラビアロール10は、基材Sの走行に連動した回転速度で、回転軸Jを中心に、所定の回転方向に回転するように制御されている。
図3~図5に示すように、塗料供給装置30には、その本体部分を構成するケース31、ドクターブレード32及びシールブレード33と、塗料供給経路を構成する円筒状の送液配管34及び返液配管35とが備えられている。塗料供給装置30の本体部分は、外観が細長い角柱形状をしており、小径グラビアロール10に沿って延びるように、小径グラビアロール10に隣接して配置されている。
ドクターブレード32の先端32aは、小径グラビアロール10の回転方向に対して逆方向から塗布部12に接している。詳しくは、図4に示すように、回転軸Jの方向から見て、ドクターブレード32の先端32aと塗布部12との接点よりも小径グラビアロール10の回転方向の進行側において、その接点に接する接線T3とドクターブレード32との間の角度が鋭角θとなるように、ドクターブレード32が配置されている。
本発明にかかるグラビアキス塗工装置1は、上述した実施形態に限定されず、それ以外の種々の構成をも包含する。
10 小径グラビアロール
12 塗布部
30 塗料供給装置
31 ケース
32 ドクターブレード
32a 先端
33 シールブレード
34 送液配管
35 返液配管
36b 下流側壁部
36c 上流側壁部
37 サイドカバー
38 貯留空間
D 外径
J 回転軸
S 基材
Claims (4)
- 外径が45mm~150mmの範囲内にあり、外周面に塗布部を有する円柱状の小径グラビアロールと、
前記小径グラビアロールに沿って延びるように配置され、前記塗布部に塗料を供給する塗料供給装置と、
を備え、
前記小径グラビアロールを回転制御しながら、直線状に引っ張られた状態で走行するシート状の基材に前記塗布部を押し付けて前記基材に塗料を塗布するグラビアキス塗工装置であって、
前記塗料供給装置は、
前記基材との接触位置に向かう前記塗布部に先端が接し、前記小径グラビアロールに沿って延びるドクターブレードと、
前記ドクターブレードを支持するとともに塗料を貯留する貯留空間を構成するケースと、
前記貯留空間に塗料を供給する塗料供給経路と、
を有し、
前記ドクターブレードの先端が、前記小径グラビアロールの回転方向に対して逆方向から前記塗布部に接するように配置され、
前記ドクターブレードの先端から回転角度で90°以内の範囲内で、前記小径グラビアロールが前記基材と接触可能なグラビアキス塗工装置。 - 請求項1に記載のグラビアキス塗工装置において、
前記ケースには、前記基材との接触位置から離れた前記塗布部に先端が接し、前記小径グラビアロールに沿って延びるシールブレードが支持され、
前記貯留空間は、前記ドクターブレード及び前記シールブレードが上下方向に並ぶように横置き可能に密閉され、
前記塗料供給装置が横置きされた場合に、前記小径グラビアロールの回転軸の方向から見て、当該塗料供給装置の最上端及び最下端の少なくともいずれか一方が、前記小径グラビアロールの上端及び下端に接する一対の接線の間に位置するグラビアキス塗工装置。 - 請求項2に記載のグラビアキス塗工装置において、
前記ケースは、
前記ドクターブレードに連なって前記貯留空間を区画する下流側壁部と、
前記下流側壁部と対向し、前記シールブレードに連なって前記貯留空間を区画する上流側壁部と、
を有し、
前記塗料供給経路は、
接続口の一端が前記上流側壁部に近接し、前記貯留空間に塗料を送る送液配管と、
接続口の一端が前記下流側壁部に近接し、前記貯留空間から塗料を戻す返液配管と、
を有し、
前記送液配管及び前記返液配管の各々の内径が、前記下流側壁部と前記上流側壁部の間隔の1/2以上に設定されているグラビアキス塗工装置。 - 請求項3に記載のグラビアキス塗工装置において、
前記返液配管が、前記小径グラビアロールの両端部に対応した位置に2つ設置され、前記送液配管が、これら返液配管の中間に1つ設置されているグラビアキス塗工装置。
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US14/389,449 US9669421B2 (en) | 2013-05-24 | 2014-03-12 | Gravure kiss coater |
CN201480002044.6A CN104520014B (zh) | 2013-05-24 | 2014-03-12 | 凹版吻式涂敷装置 |
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JP6373747B2 (ja) * | 2014-12-10 | 2018-08-15 | 株式会社ヒラノテクシード | グラビア塗工装置 |
CN106626726A (zh) * | 2016-12-25 | 2017-05-10 | 天津荣彩3D科技有限公司 | 一种新型凹版印刷涂布装置 |
KR102198728B1 (ko) * | 2017-03-29 | 2021-01-05 | 닛토덴코 가부시키가이샤 | 도공 장치 및 도공막의 제조 방법 |
JP6655039B2 (ja) | 2017-03-29 | 2020-02-26 | 日東電工株式会社 | 塗工装置及び塗工膜の製造方法 |
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US9669421B2 (en) | 2017-06-06 |
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US20160250658A1 (en) | 2016-09-01 |
JP5695698B2 (ja) | 2015-04-08 |
CN104520014A (zh) | 2015-04-15 |
CN104520014B (zh) | 2016-11-30 |
JP2014226637A (ja) | 2014-12-08 |
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