WO2021181968A1 - Slit die - Google Patents

Slit die Download PDF

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Publication number
WO2021181968A1
WO2021181968A1 PCT/JP2021/004368 JP2021004368W WO2021181968A1 WO 2021181968 A1 WO2021181968 A1 WO 2021181968A1 JP 2021004368 W JP2021004368 W JP 2021004368W WO 2021181968 A1 WO2021181968 A1 WO 2021181968A1
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WO
WIPO (PCT)
Prior art keywords
coating liquid
manifolds
discharge port
slit die
slit
Prior art date
Application number
PCT/JP2021/004368
Other languages
French (fr)
Japanese (ja)
Inventor
栗秋　武史
賢司 北島
敦 渡邉
和紀 前田
一茂 中島
Original Assignee
東レエンジニアリング株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 東レエンジニアリング株式会社 filed Critical 東レエンジニアリング株式会社
Priority to KR1020227026638A priority Critical patent/KR20220149512A/en
Priority to CN202180019597.2A priority patent/CN115279503A/en
Publication of WO2021181968A1 publication Critical patent/WO2021181968A1/en

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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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • 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
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a slit die for applying a coating liquid to a base material.
  • the base material sent by roll-to-roll is coated with a coating liquid from the discharge port of the die to manufacture battery plates and the like.
  • the thickness of the coating film formed on the base material directly affects the charge / discharge amount of the battery, so it is very important to control the film thickness of the coating liquid to be applied to the base material. It becomes. That is, the coating liquid needs to be applied with a uniform thickness along the width direction and the feeding direction of the base material.
  • Patent Document 1 describes a configuration in which the occurrence of coating streaks is suppressed by dispersing local flow velocity fluctuations, and the thickness of the coating film formed on the substrate is made uniform.
  • Patent Document 1 Japanese Patent No. 6425776
  • An object of the present invention is to solve the above problems and to coat a coating film having good quality and uniform thickness.
  • the present invention is a slit die that discharges a coating liquid onto a base material.
  • Each is a space for storing the coating liquid, and there are multiple manifolds provided in the width direction, A plurality of coating liquid supply ports for supplying coating liquid to the plurality of manifolds, respectively.
  • a single discharge port that is connected to the plurality of manifolds via a slit that is wide in the width direction and discharges the coating liquid to the base material.
  • the shim is characterized in that it has end protrusions extending to the discharge port at both ends of the slit die and intermediate protrusions extending from each manifold in the direction of the discharge port between the manifolds. It provides a slit die to be used.
  • the intermediate protrusion may have a tapered shape in the width direction in which the width becomes narrower toward the discharge port.
  • the coating liquids in the plurality of manifolds easily merge near the front of the discharge port, and a stable coating film can be applied.
  • the widthwise taper shape of the intermediate protrusion may be a shape in which the inclination starts from the inside of the manifold in the discharge port direction.
  • the coating liquids in the plurality of manifolds can be more easily merged in the vicinity of the front of the discharge port, and a stable coating film can be applied.
  • the widthwise taper shape of the intermediate protrusion may be a stepped shape.
  • the intermediate protrusion may have a thickness-direction taper shape in which the thickness decreases toward the discharge port.
  • the coating liquids in the plurality of manifolds can be more easily merged in the vicinity of the front of the discharge port, and a stable coating film can be applied.
  • a plurality of the coating liquid supply ports may be provided for each of the manifolds, and the plurality of coating liquid supply ports in one manifold may be configured such that the flow rate ranges of the supplied coating liquids are different from each other.
  • the adjustment range of the coating liquid flow rate can be widened, and a uniform coating film can be applied.
  • Example 1 of the present invention It is a figure explaining the slit die in Example 1 of this invention. It is a view of arrow a in Example 1 of this invention.
  • Example 1 of the present invention (a) is a view taken along the arrow b, and (b) is a plan view of the shim 15.
  • Example 2 of the present invention (a) is a view taken along the arrow b, and (b) is a plan view of the shim 115.
  • Example 3 of the present invention (a) is a view taken along the arrow b, and (b) is a plan view of the shim 215.
  • Example 4 of the present invention (a) is a view taken along the arrow b, and (b) is a plan view of the shim 315. It is a view of arrow a in Example 5 of this invention.
  • FIG. 1 is a diagram illustrating a slit die according to a first embodiment of the present invention.
  • FIG. 2 is a view taken along the line a in Example 1 of the present invention.
  • 3A and 3B are a view taken along the line b in Example 1 of the present invention, and
  • FIG. 3B is a plan view of the shim 15.
  • the slit die 1 in the first embodiment is for applying the coating liquid 3 to the base material 2 sent by roll-to-roll.
  • the coating liquid 3 is coated with a uniform thickness (uniform coating amount) along the feeding direction MD of the base material 2.
  • the width direction TD of the base material 2 is a direction orthogonal to the feed direction MD of the base material 2, and the Y-axis direction in FIG. 1 corresponds to this.
  • the slit die 1 is formed long along the width direction of the base material 2, and the coating liquid 3 is supplied to the slit die 1 from the supply means 20.
  • the longitudinal direction (Y-axis direction in FIG. 1) is referred to as the width direction TD.
  • the roller 5 facing the slit die 1 is installed, and the width direction of the slit die 1 and the direction of the rotation center line of the roller 5 are parallel.
  • the base material 2 is guided by the roller 5, and the distance (gap) between the base material 2 and the slit die 1 is kept constant, and the coating liquid 3 is applied in this state.
  • the slit die 1 sandwiches a shim plate 15 between a first split body 13 having a tapered first lip 13a and a second split body 14 having a tapered second lip 14a.
  • FIG. 2 is a cross-sectional view taken along the line a of FIG.
  • FIG. 3A is a cross-sectional view taken along the line b of FIG. 1, and the shim plate 15 is shown in FIG. 3B.
  • the slit die 1 is provided with three manifolds 11 (11a, 11b, 11c) having a plurality of spaces in the width direction uniformly having the same length in the width direction.
  • One slit 12 connected to the three manifolds 11 (11a, 11b, 11c) is formed, and between the first lip 13a and the second lip 14a, one slit 12 is an open end.
  • the discharge port 4 is formed. That is, the three manifolds 11 (11a, 11b, 11c) and one discharge port 4 are connected via the slit 12.
  • the coating liquid 3 supplied by the supply means 20 is first stored in the three manifolds 11 (11a, 11b, 11c), and then from the wide one discharge port 4 via the slit 12. It is discharged.
  • the slit 12 is formed long in the width direction TD provided with three manifolds 11 (11a, 11b, 11c), and the width direction dimension of the slit 12 is the inner dimension W of the shim plate 15 described later (FIG. 3). (See (b)), the coating liquid 3 flowing out from each of the three manifolds 11 (11a, 11b, 11c) joins at the slit 12, and the coating liquid 3 having a long dimension in the width direction is combined with one. It can be applied onto the base material 2 from the discharge port 4.
  • the gap dimension (height dimension) of the slit 12 is, for example, 0.4 to 1.5 mm.
  • the slit die 1 is installed in a posture in which the gap direction of the slit 12 is the vertical direction and the width direction is the horizontal direction. That is, the slit die 1 is installed in a posture in which the three manifolds 11 (11a, 11b, 11c) and the slits 12 are arranged side by side in the horizontal direction. Therefore, the direction in which the coating liquid 3 stored in the three manifolds 11 (11a, 11b, 11c) flows to the base material 2 through the slit 12 and the discharge port 4 is the horizontal direction.
  • the pressure (coating pressure) inside the three manifolds 11 (11a, 11b, 11c) can be adjusted, and this adjustment has various characteristics. It is possible to apply a uniform film thickness with the coating liquid 3.
  • the direction in which the coating liquid 3 flows to the base material 2 through the discharge port 4 is set to the horizontal direction, but the direction is not necessarily limited to this and can be changed as appropriate. For example, it may be in the upward direction or in the downward direction, and can be set in any direction.
  • Three coating liquid supply ports 16 (16a, 16b, 16c) are provided for each of the three manifolds 11 (11a, 11b, 11c) in the width direction of the slit die 1, and the coating liquid supply ports 16 (16a, 16b, 16c) are provided.
  • 16a, 16b, 16c) are composed of through holes (inflow ports) connected to the three manifolds 11 (11a, 11b, 11c) from the outside of the slit die 1.
  • the supply means 20 includes an inflow pipe 21 having one end connected to the coating liquid supply port 16 (16a, 16b, 16c), a tank 22 storing the coating liquid 3, and a coating liquid in the tank 22.
  • the supply means 20 individually limits the flow rate with the valves 24 (24a, 24b, 24c), and enters the respective manifolds 11 (11a, 11b, 11c) from the coating liquid supply port 16 (16a, 16b, 16c).
  • the coating liquid 3 can be supplied.
  • the coating liquid supply port 16 (16a, 16b, 16c) is connected to the bottom 17 (17a, 17b, 17c) of the manifold 11 (11a, 11b, 11c).
  • the coating liquid 3 is made to flow from the bottom 17 (17a, 17b, 17c) into the respective manifolds 11 (11a, 11b, 11c).
  • the three manifolds 11 can store the coating liquid 3 supplied from the supply means 20, and the coatings stored in the three manifolds 11 (11a, 11b, 11c) can be stored.
  • the liquid 3 can be merged through the slit 12 and discharged from one discharge port 4 to the base material 2 sent by roll-to-roll, and the coating liquid 3 can be continuously applied to the base material 2. can.
  • the gap size of the slit 12 is constant in the width direction, and the thickness of the coating liquid 3 coated on the base material 2 is constant in the width direction.
  • the coating is applied to the plurality of manifolds 11 (11a, 11b, 11c) from the coating liquid supply port 16 (16a, 16b, 16c) via the bottom 17 (17a, 17b, 17c).
  • the liquid 3 is made to flow in, and the coating liquids 3 stored in the three manifolds 11 (11a, 11b, 11c) are merged and discharged at one discharge port 4.
  • the shim 15 In the slit die 1, it is the shim 15 that separates the three manifolds 11 (11a, 11b, 11c).
  • the shim 15 will be described in detail.
  • the shim 15 has end protrusions 18 (18a, 18b) extending to the discharge port 4 at both ends of the slit die 1, and each manifold 11 (11a, 11b). , 11c) each have a comb-like shape having intermediate protrusions 19 (19a, 19b) extending from the manifolds 11 (11a, 11b, 11c) in the four directions of the discharge port.
  • the length of the shim 15 in the width direction (Y direction) is substantially the same as the length of the slit die 1 in the width direction, and the length in the thickness direction (Z direction) defines the height of the slit 12. Is.
  • the length of the end protrusions 18 (18a, 18b) in the X direction orthogonal to the TD direction is almost the same as the length of the slit die 1 in the X direction.
  • the length of the intermediate protrusions 19 (19a, 19b) in the X direction extends in the discharge port 4 directions from each manifold 11 (11a, 11b, 11c) and is shorter than the end protrusions 18 (18a, 18b). Has been done. Further, the ends of the intermediate protrusions 18 (18a, 18b) on the discharge port 4 (X direction) side are formed linearly in a direction orthogonal to the discharge port 4 direction. With these configurations, the coating liquid 3 stored in each manifold 11 (11a, 11b, 11c) can be merged in the slit 12 before reaching the discharge port 4, and smooth and stable coating can be performed. can.
  • the manifolds 11 are separated to form independent manifolds 11 (11a, 11b, 11c).
  • Each manifold 11 (11a, 11b, 11c) becomes independent, and by supplying the coating liquid 3 from different valves 24 (24a, 24b, 24c), each manifold 11 (11a, 11b, 11c) becomes a slit 12. The amount of the flowing coating liquid 3 can be easily controlled.
  • the coating that flows out from each manifold 11 (11a, 11b, 11c) The liquid 3 can be easily merged in the slit 12 before reaching the discharge port 4.
  • the amount of the coating liquid 3 to be discharged can be remarkably controlled in the width direction, and the amount of the coating liquid 3 can be discontinuously changed for each of the manifolds 11 (11a, 11b, 11c). Since there is no dent in the coating film, it is possible to keep the coated film thickness constant.
  • the number of manifolds is set to three, and the configurations are provided so as to have the same length in the width direction, but the configuration is not necessarily limited to this and can be changed as appropriate.
  • the number of manifolds may be two or four or more.
  • the lengths between the manifolds are not uniform, and the length in the width direction of any of the manifolds may be long. That is, the number of manifolds and the length of each manifold may be determined so that the film thickness can be controlled based on the length of the slit die 1 in the width direction. Further, the number of intermediate protrusions and the number of coating liquid supply ports may be determined based on the number of manifolds.
  • the direction in which the coating liquid 3 stored in the plurality of manifolds 11 (11a, 11b, 11c) flows to the base material 2 through the slit 12 and the discharge port 4 is a horizontal direction, but it is not always the case. Not limited to this, it can be changed as appropriate. For example, it may be in the vertical direction (upward or downward) or diagonally.
  • the valve 24 (24a, 24b, 24c) is configured to control the amount of the coating liquid 3 flowing into each manifold 11 (11a, 11b, 11c), but the present invention is not necessarily limited to this. It can be changed as appropriate. For example, instead of the valves 24 (24a, 24b, 24c), three pumps are connected to the respective manifolds 11 (11a, 11b, 11c) to control the amount of the inflowing liquid 3. May be good.
  • the slit die 1 in the first embodiment is fixed and has a configuration in which the coating liquid 3 is applied to the base material 2 transported by low-to-roll, but the present invention is not necessarily limited to this and can be changed as appropriate. be.
  • the slit die 1 may move to a stationary piece of base material to coat the coating liquid 3.
  • the slit die that discharges the coating liquid onto the base material.
  • Each is a space for storing the coating liquid, and there are multiple manifolds provided in the width direction, A plurality of coating liquid supply ports for supplying coating liquid to the plurality of manifolds, respectively.
  • a single discharge port that is connected to the plurality of manifolds via a slit that is wide in the width direction and discharges the coating liquid to the base material.
  • the shim is characterized in that both ends of the slit die have end protrusions extending to the discharge port, and each manifold has intermediate protrusions extending from each manifold in the direction of the discharge port. It is possible to control the discharge amount in the width direction by using the slit die, and it is possible to apply a coating film having good quality and a uniform thickness.
  • the second embodiment of the present invention is different from the first embodiment in that the intermediate protrusion has a tapered shape in the width direction in which the width becomes narrower toward the discharge port.
  • the second embodiment will be described with reference to FIG. 4A and 4B are a view taken along the line b in Example 2 of the present invention, and FIG. 4B is a plan view of the shim 115.
  • the slit 115 of the slit die 101 in the second embodiment As shown in FIGS. In the direction, it has a width taper shape in which the inclination starts from the discharge port 4 side of the manifold 11 (11a, 11b, 11c) and the width in the Y direction becomes linearly narrower toward the center of the width.
  • the coating liquids 3 in the plurality of manifolds 11 (11a, 11b, 11c) can easily merge on the manifold 11 (11a, 11b, 11c) side of the discharge port 4, and a stable coating film can be applied. ..
  • the intermediate protrusion 119 (119a, 119b) has a tapered shape in the width direction in which the width linearly narrows toward the center of the width, but the present invention is not necessarily limited to this. It can be changed as appropriate.
  • the intermediate protrusion 119 (119a, 119b) may have a tapered shape in the width direction in which the width is curved toward the center of the width.
  • the intermediate protrusion has a taper shape in the width direction in which the width becomes narrower toward the discharge port, so that the coating liquid in the plurality of manifolds is near the front of the discharge port. It is easy to merge and a stable coating film can be applied.
  • the third embodiment of the present invention is different from the first and second embodiments in that the tapered shape in the width direction at the intermediate protrusion is a shape in which the inclination starts from the inside of the manifold in the discharge port direction.
  • the third embodiment will be described with reference to FIG. 5A and 5B are a view taken along the line b in Example 3 of the present invention, and FIG. 5B is a plan view of the shim 215.
  • the coating liquids in the plurality of manifolds can be more easily merged in the vicinity of the discharge port, and a stable coating film can be applied.
  • the width of the intermediate protrusions 219 (219a and 219b) has a taper shape in the width direction that is linearly narrowed toward the center of the width, but the present invention is not necessarily limited to this. It can be changed as appropriate.
  • the intermediate protrusions 219 (219a and 219b) may have a tapered shape in the width direction in which the width is curved toward the center of the width.
  • the widthwise taper shape in the intermediate protrusion is a shape in which the inclination starts from the inside of the manifold toward the discharge port, so that the coating liquid in the plurality of manifolds is further applied in the vicinity of the front of the discharge port. It is easy to merge and a stable coating film can be applied.
  • Example 4 of the present invention is different from Examples 1 to 3 in that the tapered shape in the width direction at the intermediate protrusion is a stepped shape.
  • the fourth embodiment will be described with reference to FIG. 6A and 6B are views taken along the arrow b in Example 4 of the present invention, and FIG. 6B is a plan view of the shim 315.
  • the slit 315 of the slit die 301 in the fourth embodiment has a tapered shape in the width direction in which the inclination starts from the discharge port 4 side of the manifold 11 (11a, 11b, 11c) and the width becomes narrower in a stepwise manner toward the center of the width.
  • the coating liquid can easily merge in the vicinity of the front of the discharge port, and a stable coating film can be applied.
  • the intermediate protrusions 319 (319a, 319b) are inclined from the discharge port 4 side of the manifold 11 (11a, 11b, 11c) in the discharge port direction from the manifold 11 (11a, 11b, 11c).
  • the width is tapered in a stepwise manner toward the center of the width. It may have a shape.
  • the widthwise taper shape in the intermediate protrusion is a stepped shape, so that the coating liquid easily merges in the vicinity of the discharge port and is stable while maintaining the independence of the plurality of manifolds.
  • the coated coating film can be applied.
  • Example 5 of the present invention is different from Examples 1 to 4 in that the intermediate protrusion has a thickness-direction taper shape in which the thickness decreases toward the discharge port.
  • the fifth embodiment will be described with reference to FIG.
  • FIG. 7 is a view taken along the line a in Example 5 of the present invention.
  • the intermediate protrusions 419 (419a, 419b) have the manifold 11 (11a, 11a) in the discharge port 4 direction from the manifold 11 (11a, 11b, 11c). It has a thickness-direction taper shape in which the thickness in the Z direction is linearly reduced toward the center of the thickness by starting the inclination from the discharge port 4 side with respect to 11b and 11c).
  • the coating liquids in the plurality of manifolds can be more easily merged in the vicinity of the front of the discharge port, and a stable coating film can be applied.
  • the intermediate protrusions 419 (419a, 419b) are inclined from the discharge port 4 side of the manifold 11 (11a, 11b, 11c) in the discharge port direction from the manifold 11 (11a, 11b, 11c).
  • Is configured to have a taper shape in the width direction in which the thickness decreases linearly toward the center of the thickness but the thickness is not necessarily limited to this and can be changed as appropriate.
  • the thickness direction taper in the manifold 11 (11a, 11b, 11c), that is, from the root of the intermediate protrusion 419 (419a, 419b) toward the discharge port 4 direction the thickness is curvedly reduced toward the thickness center. It may have a shape, or it may have a taper shape in the thickness direction that becomes thinner in a stepped manner.
  • the intermediate protrusion has a taper shape in the thickness direction in which the thickness decreases toward the discharge port, the coating liquids in the plurality of manifolds further merge in the vicinity of the front of the discharge port. It is easy to apply and a stable coating film can be applied.
  • a plurality of coating liquid supply ports are provided for each manifold, and the plurality of coating liquid supply ports in one manifold have different flow rate ranges of the coated liquid from each other. It is different from 5.
  • the slit die (not shown) in the sixth embodiment is provided with two coating liquid supply ports for each manifold 11 (11a, 11b, 11c), and is connected to different valves so as to be able to supply different flow rates of the coating liquid. doing. With this configuration, the adjustment range of the coating liquid flow rate can be widened, and a uniform coating film can be applied.
  • each manifold 11 11a, 11b, 11c
  • the configuration is not necessarily limited to this and can be changed as appropriate. It is possible.
  • each manifold 11 11a, 11b, 11c
  • the manifold 11 (11a, 11b, 11c) is provided with two coating liquid supply ports, but the configuration is not necessarily limited to this, and changes can be made as appropriate.
  • each manifold 11 (11a, 11b, 11c) may be provided with three or more coating liquid supply ports. Thereby, the adjustment range of the coating liquid flow rate can be further widened.
  • a plurality of coating liquid supply ports are provided for each manifold, and the plurality of coating liquid supply ports in one manifold have different coating liquid flow rate ranges.
  • the flow rate adjustment range can be widened, and a uniform coating film can be applied.
  • the present invention can be widely applied to a slit die for applying a coating liquid to a base material.
  • Slit die 2 Base material 3: Coating liquid 5: Roller 4: Discharge port 11: Manifold 11 (11a, 11b, 11c) 12: Slit 15: Sim 16 (16a, 16b, 16c): Coating liquid supply port 17 (17a, 17b, 17c): Bottom 18 (18a, 18b): End protrusion 19 (19a, 19b, 19c): Intermediate protrusion 20: Supply means 22: Tank 23: Pump 24 (24a, 24b, 24c) : Valve 101: Slit die 115: Sim 119 (119a, 119b): Intermediate protrusion 201: Slit die 215: Sim 219 (219a, 219b): Intermediate protrusion 301: Slit die 315: Sim 319 (319a, 319b): Intermediate protrusion

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  • Coating Apparatus (AREA)

Abstract

Provided is a slit die that applies a coating film with a good quality and a uniform thickness. Specifically, provided is a slit die 1 for dispensing a coating fluid onto a substrate, characterized by comprising a plurality of manifolds 11 arranged in a transverse direction, each defining a volume for storing the coating fluid, a plurality of coating fluid feeding inlets 16 for feeding the coating fluid into the plurality of respective manifolds, a single dispensing outlet 4 connected to the plurality of manifolds via a slit 12, which is wide in the transverse direction, for dispensing the coating fluid onto the substrate, and a shim 15 provided so as to configure the height of the slit, the shim being provided with end projecting sections 18 at the opposite ends of the slit die, the end projecting sections 18 extending up to the dispensing outlet, and intermediate projecting sections 19 between the manifolds, each of the intermediate projecting sections 19 extending further than the respective manifolds in the direction of the dispensing outlet.

Description

スリットダイSlit die
　本発明は、基材に塗液を塗工するスリットダイに関するものである。 The present invention relates to a slit die for applying a coating liquid to a base material.
　ロールツーロールで送られる基材に、塗液をダイの吐出口から塗工して電池の極板等を製造することが行われている。基材上に形成される塗工膜の厚さは、例えば電池の場合、電池の充放電量に直接影響を与えることから、基材に塗工する塗工液の膜厚管理は非常に重要となる。つまり、塗液は、基材の幅方向及び送り方向に沿って均一な厚さで塗工され必要がある。 The base material sent by roll-to-roll is coated with a coating liquid from the discharge port of the die to manufacture battery plates and the like. In the case of a battery, for example, the thickness of the coating film formed on the base material directly affects the charge / discharge amount of the battery, so it is very important to control the film thickness of the coating liquid to be applied to the base material. It becomes. That is, the coating liquid needs to be applied with a uniform thickness along the width direction and the feeding direction of the base material.
　特許文献１には、局所的な流速変動を分散させることで塗工スジの発生を抑え、基材上に形成される塗工膜の厚さを均一にする構成が記載されている。 Patent Document 1 describes a configuration in which the occurrence of coating streaks is suppressed by dispersing local flow velocity fluctuations, and the thickness of the coating film formed on the substrate is made uniform.
　特許文献１：特許第６４２５７７６号公報 Patent Document 1: Japanese Patent No. 6425776
　しかしながら、特許文献１記載のものは、ダイ内部での塗液に圧力が印加されることで塗液が分離しやすく、また分離した塗液をタンクに戻して再利用されることで塗工膜の品質にも影響を与える恐れがあるという問題があった。 However, in the case described in Patent Document 1, the coating liquid is easily separated by applying pressure to the coating liquid inside the die, and the separated coating liquid is returned to the tank and reused to be used as a coating film. There was a problem that it might affect the quality of the product.
本発明は、上記問題点を解決して、品質がよく厚さが均一な塗工膜を塗工することを課題とする。 An object of the present invention is to solve the above problems and to coat a coating film having good quality and uniform thickness.
　上記の課題を解決するために本発明は、塗液を基材に吐出するスリットダイであって、
　それぞれが塗液を溜める空間であり、幅方向に設けられた複数のマニホールドと、
　前記複数のマニホールドにそれぞれ塗液を供給する複数の塗液供給口と、
　前記幅方向に広いスリットを経由して当該複数のマニホールドと繋がり、塗液を基材に対して吐出する一の吐出口と、
　前記スリットの高さを構成するために設けられたシムと、を備え、
　前記シムは、当該スリットダイの両端部に前記吐出口まで延びる端部突起部を有するとともに、各マニホールド間にそれぞれ各マニホールドよりも前記吐出口方向に延びた中間突起部を有したことを特徴とするスリットダイを提供するものである。 In order to solve the above problems, the present invention is a slit die that discharges a coating liquid onto a base material.
Each is a space for storing the coating liquid, and there are multiple manifolds provided in the width direction,
A plurality of coating liquid supply ports for supplying coating liquid to the plurality of manifolds, respectively.
A single discharge port that is connected to the plurality of manifolds via a slit that is wide in the width direction and discharges the coating liquid to the base material.
With a shim provided to form the height of the slit,
The shim is characterized in that it has end protrusions extending to the discharge port at both ends of the slit die and intermediate protrusions extending from each manifold in the direction of the discharge port between the manifolds. It provides a slit die to be used.
この構成により、幅方向の吐出量を制御することが可能で、品質がよく厚さが均一な塗工膜を塗工することができる。 With this configuration, it is possible to control the discharge amount in the width direction, and it is possible to apply a coating film having good quality and a uniform thickness.
前記中間突起部は、前記吐出口方向に向かって幅が細くなる幅方向テーパ形状を有している構成としてもよい。 The intermediate protrusion may have a tapered shape in the width direction in which the width becomes narrower toward the discharge port.
この構成により、複数のマニホールドにおける塗液が吐出口手前付近で合流しやすく、安定した塗工膜を塗工することができる。 With this configuration, the coating liquids in the plurality of manifolds easily merge near the front of the discharge port, and a stable coating film can be applied.
前記中間突起部における前記幅方向テーパ形状は、前記マニホールド内から吐出口方向に傾斜が開始する形状である構成としてもよい。 The widthwise taper shape of the intermediate protrusion may be a shape in which the inclination starts from the inside of the manifold in the discharge port direction.
この構成により、複数のマニホールドにおける塗液が吐出口手前付近でさらに合流しやすく、安定した塗工膜を塗工することができる。 With this configuration, the coating liquids in the plurality of manifolds can be more easily merged in the vicinity of the front of the discharge port, and a stable coating film can be applied.
前記中間突起部における前記幅方向テーパ形状は、階段形状である構成としてもよい。 The widthwise taper shape of the intermediate protrusion may be a stepped shape.
この構成により、塗液の合流がしやすく、安定した塗工膜を塗工することができる。 With this configuration, it is easy for the coating liquids to merge, and a stable coating film can be applied.
前記中間突起部は、前記吐出口方向に向かって厚みが薄くなる厚み方向テーパ形状を有している構成としてもよい。 The intermediate protrusion may have a thickness-direction taper shape in which the thickness decreases toward the discharge port.
この構成により、複数のマニホールドにおける塗液が吐出口手前付近でさらに合流しやすくなり、安定した塗工膜を塗工することができる。 With this configuration, the coating liquids in the plurality of manifolds can be more easily merged in the vicinity of the front of the discharge port, and a stable coating film can be applied.
各前記マニホールド毎に前記塗液供給口を複数備え、一つの前記マニホールドにおける複数の前記塗液供給口は、供給される塗液の流量の範囲が互いに異なる構成としてもよい。 A plurality of the coating liquid supply ports may be provided for each of the manifolds, and the plurality of coating liquid supply ports in one manifold may be configured such that the flow rate ranges of the supplied coating liquids are different from each other.
この構成により、塗液流量の調節範囲を広くすることができ、均一な塗工膜を塗工することができる。 With this configuration, the adjustment range of the coating liquid flow rate can be widened, and a uniform coating film can be applied.
本発明の実施例１におけるスリットダイを説明する図である。It is a figure explaining the slit die in Example 1 of this invention. 本発明の実施例１におけるａ矢視図である。It is a view of arrow a in Example 1 of this invention. 本発明の実施例１における（ａ）はｂ矢視図で、（ｂ）はシム１５の平面図である。In Example 1 of the present invention, (a) is a view taken along the arrow b, and (b) is a plan view of the shim 15. 本発明の実施例２における（ａ）はｂ矢視図で、（ｂ）はシム１１５の平面図である。In Example 2 of the present invention, (a) is a view taken along the arrow b, and (b) is a plan view of the shim 115. 本発明の実施例３における（ａ）はｂ矢視図で、（ｂ）はシム２１５の平面図である。In Example 3 of the present invention, (a) is a view taken along the arrow b, and (b) is a plan view of the shim 215. 本発明の実施例４における（ａ）はｂ矢視図で、（ｂ）はシム３１５の平面図である。In Example 4 of the present invention, (a) is a view taken along the arrow b, and (b) is a plan view of the shim 315. 本発明の実施例５におけるａ矢視図である。It is a view of arrow a in Example 5 of this invention.
本発明の実施例１について、図１～図３を参照して説明する。図１は、本発明の実施例１におけるスリットダイを説明する図である。図２は、本発明の実施例１におけるａ矢視図である。図３は、本発明の実施例１における（ａ）はｂ矢視図で、（ｂ）はシム１５の平面図である。 Example 1 of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a diagram illustrating a slit die according to a first embodiment of the present invention. FIG. 2 is a view taken along the line a in Example 1 of the present invention. 3A and 3B are a view taken along the line b in Example 1 of the present invention, and FIG. 3B is a plan view of the shim 15.
実施例１におけるスリットダイ１は、ロールツーロールで送られる基材２に、塗液３を塗工するためのものである。塗液３は、基材２の送り方向ＭＤに沿って均一な厚さ（均一な塗工量）で塗工される。なお、基材２の幅方向ＴＤは、基材２の送り方向ＭＤに直交する方向であり、図１におけるＹ軸方向がこれに相当する。 The slit die 1 in the first embodiment is for applying the coating liquid 3 to the base material 2 sent by roll-to-roll. The coating liquid 3 is coated with a uniform thickness (uniform coating amount) along the feeding direction MD of the base material 2. The width direction TD of the base material 2 is a direction orthogonal to the feed direction MD of the base material 2, and the Y-axis direction in FIG. 1 corresponds to this.
スリットダイ１は、基材２の幅方向に沿って長く構成され、このスリットダイ１には供給手段２０から塗液３が供給される。スリットダイ１において、その長手方向（図１におけるＹ軸方向）を幅方向ＴＤという。実施例１においては、スリットダイ１に対向するローラ５が設置されており、スリットダイ１の幅方向とローラ５の回転中心線の方向とは平行である。基材２は、このローラ５に案内され、基材２とスリットダイ１との間隔（隙間）が一定に保たれ、この状態で塗液３の塗工が行われる。 The slit die 1 is formed long along the width direction of the base material 2, and the coating liquid 3 is supplied to the slit die 1 from the supply means 20. In the slit die 1, the longitudinal direction (Y-axis direction in FIG. 1) is referred to as the width direction TD. In the first embodiment, the roller 5 facing the slit die 1 is installed, and the width direction of the slit die 1 and the direction of the rotation center line of the roller 5 are parallel. The base material 2 is guided by the roller 5, and the distance (gap) between the base material 2 and the slit die 1 is kept constant, and the coating liquid 3 is applied in this state.
スリットダイ１は、先細り形状である第一リップ１３ａを有する第一分割体１３と、先細り形状である第二リップ１４ａを有する第二分割体１４とを、これらの間にシム板１５を挟んで、組み合わせた構成からなる。図２は、図１のａ矢視の断面図である。図３（ａ）は、図１のｂ矢視の断面図であり、シム板１５を、図３（ｂ）に示している。スリットダイ１は、その内部に、幅方向に複数の空間からなる複数のマニホールド１１（１１ａ、１１ｂ、１１ｃ）が均等に同じ幅方向の長さを有して３個設けられている。この３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）と繋がる一のスリット１２とが形成され、また、第一リップ１３ａと第二リップ１４ａとの間には、スリット１２の解放端である一の吐出口４が形成されている。すなわち、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）と一の吐出口４とは、スリット１２を経由して繋がっている。 The slit die 1 sandwiches a shim plate 15 between a first split body 13 having a tapered first lip 13a and a second split body 14 having a tapered second lip 14a. , Consists of a combined configuration. FIG. 2 is a cross-sectional view taken along the line a of FIG. FIG. 3A is a cross-sectional view taken along the line b of FIG. 1, and the shim plate 15 is shown in FIG. 3B. The slit die 1 is provided with three manifolds 11 (11a, 11b, 11c) having a plurality of spaces in the width direction uniformly having the same length in the width direction. One slit 12 connected to the three manifolds 11 (11a, 11b, 11c) is formed, and between the first lip 13a and the second lip 14a, one slit 12 is an open end. The discharge port 4 is formed. That is, the three manifolds 11 (11a, 11b, 11c) and one discharge port 4 are connected via the slit 12.
この構成により、供給手段２０により供給された塗液３は、先ず３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）に溜められ、次に、スリット１２を経由して幅広の一の吐出口４から吐出される。 With this configuration, the coating liquid 3 supplied by the supply means 20 is first stored in the three manifolds 11 (11a, 11b, 11c), and then from the wide one discharge port 4 via the slit 12. It is discharged.
スリット１２は、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）が設けられた幅方向ＴＤに長く形成されており、スリット１２の幅方向寸法は、後述するシム板１５の内寸Ｗ（図３（ｂ）参照）によって決定され、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）の各々から流出する塗液３がスリット１２で合流して、幅方向に長い寸法の塗液３を、一の吐出口４から基材２上に塗工することができる。スリット１２の隙間寸法（高さ寸法）は、例えば０．４～１．５ｍｍである。実施例１では、スリット１２の隙間方向が上下方向であり、幅方向が水平方向となる姿勢でスリットダイ１は設置されている。つまり、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）とスリット１２とが水平方向に並んで配置される姿勢でスリットダイ１は設置されている。したがって、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）に溜められている塗液３をスリット１２および吐出口４を通じて基材２へと流す方向は水平方向となる。 The slit 12 is formed long in the width direction TD provided with three manifolds 11 (11a, 11b, 11c), and the width direction dimension of the slit 12 is the inner dimension W of the shim plate 15 described later (FIG. 3). (See (b)), the coating liquid 3 flowing out from each of the three manifolds 11 (11a, 11b, 11c) joins at the slit 12, and the coating liquid 3 having a long dimension in the width direction is combined with one. It can be applied onto the base material 2 from the discharge port 4. The gap dimension (height dimension) of the slit 12 is, for example, 0.4 to 1.5 mm. In the first embodiment, the slit die 1 is installed in a posture in which the gap direction of the slit 12 is the vertical direction and the width direction is the horizontal direction. That is, the slit die 1 is installed in a posture in which the three manifolds 11 (11a, 11b, 11c) and the slits 12 are arranged side by side in the horizontal direction. Therefore, the direction in which the coating liquid 3 stored in the three manifolds 11 (11a, 11b, 11c) flows to the base material 2 through the slit 12 and the discharge port 4 is the horizontal direction.
なお、シム板１５の厚さを変更することにより、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）内部の圧力（塗工圧力）を調整することができ、この調整によって、様々な特性を有する塗液３で均一な膜厚の塗工を行うことが可能となる。 By changing the thickness of the shim plate 15, the pressure (coating pressure) inside the three manifolds 11 (11a, 11b, 11c) can be adjusted, and this adjustment has various characteristics. It is possible to apply a uniform film thickness with the coating liquid 3.
また、実施例１においては、塗液３が吐出口４を通じて基材２へと流れる方向を水平方向としたが、必ずしもこれに限定されず適宜変更が可能である。例えば、上方向としてもよいし、下方向としてもよく、任意の方向に設定することができる。 Further, in the first embodiment, the direction in which the coating liquid 3 flows to the base material 2 through the discharge port 4 is set to the horizontal direction, but the direction is not necessarily limited to this and can be changed as appropriate. For example, it may be in the upward direction or in the downward direction, and can be set in any direction.
スリットダイ１の幅方向に、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）毎に３個の塗液供給口１６（１６ａ、１６ｂ、１６ｃ）が設けられており、この塗液供給口１６（１６ａ、１６ｂ、１６ｃ）は、スリットダイ１の外部から３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）へ繋がる貫通孔（流入口）からなる。供給手段２０は、この塗液供給口１６（１６ａ、１６ｂ、１６ｃ）に一端部が接続されている流入パイプ２１と、塗液３を貯留しているタンク２２と、このタンク２２内の塗液３を、パイプ２１を通じてスリットダイ１へ供給するためのポンプ２３と、マニホールド１１（１１ａ、１１ｂ、１１ｃ）毎に３個のバルブ２４（２４ａ、２４ｂ、２４ｃ）を有している。以上より、供給手段２０は、バルブ２４（２４ａ、２４ｂ、２４ｃ）で個別に流量制限して、それぞれのマニホールド１１（１１ａ、１１ｂ、１１ｃ）に塗液供給口１６（１６ａ、１６ｂ、１６ｃ）から塗液３を供給することができる。なお、実施例１では、図１に示すように、塗液供給口１６（１６ａ、１６ｂ、１６ｃ）は、マニホールド１１（１１ａ、１１ｂ、１１ｃ）の底部１７（１７ａ、１７ｂ、１７ｃ）と繋がっており、この底部１７（１７ａ、１７ｂ、１７ｃ）からそれぞれのマニホールド１１（１１ａ、１１ｂ、１１ｃ）に塗液３を流入させる構成としている。 Three coating liquid supply ports 16 (16a, 16b, 16c) are provided for each of the three manifolds 11 (11a, 11b, 11c) in the width direction of the slit die 1, and the coating liquid supply ports 16 (16a, 16b, 16c) are provided. 16a, 16b, 16c) are composed of through holes (inflow ports) connected to the three manifolds 11 (11a, 11b, 11c) from the outside of the slit die 1. The supply means 20 includes an inflow pipe 21 having one end connected to the coating liquid supply port 16 (16a, 16b, 16c), a tank 22 storing the coating liquid 3, and a coating liquid in the tank 22. It has a pump 23 for supplying 3 to the slit die 1 through the pipe 21, and three valves 24 (24a, 24b, 24c) for each manifold 11 (11a, 11b, 11c). From the above, the supply means 20 individually limits the flow rate with the valves 24 (24a, 24b, 24c), and enters the respective manifolds 11 (11a, 11b, 11c) from the coating liquid supply port 16 (16a, 16b, 16c). The coating liquid 3 can be supplied. In the first embodiment, as shown in FIG. 1, the coating liquid supply port 16 (16a, 16b, 16c) is connected to the bottom 17 (17a, 17b, 17c) of the manifold 11 (11a, 11b, 11c). The coating liquid 3 is made to flow from the bottom 17 (17a, 17b, 17c) into the respective manifolds 11 (11a, 11b, 11c).
そして、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）は、供給手段２０から供給された塗液３を溜めることができ、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）に溜められている塗液３を、スリット１２で合流させて一の吐出口４からロールツーロールで送られる基材２に対して吐出し、この基材２に対して塗液３を連続的に塗工することができる。スリット１２の隙間寸法はその幅方向に一定であり、基材２上に塗工される塗液３の厚さは幅方向に一定となる。 The three manifolds 11 (11a, 11b, 11c) can store the coating liquid 3 supplied from the supply means 20, and the coatings stored in the three manifolds 11 (11a, 11b, 11c) can be stored. The liquid 3 can be merged through the slit 12 and discharged from one discharge port 4 to the base material 2 sent by roll-to-roll, and the coating liquid 3 can be continuously applied to the base material 2. can. The gap size of the slit 12 is constant in the width direction, and the thickness of the coating liquid 3 coated on the base material 2 is constant in the width direction.
　前述したように、実施例１においては、塗液供給口１６（１６ａ、１６ｂ、１６ｃ）から底部１７（１７ａ、１７ｂ、１７ｃ）を介して、複数のマニホールド１１（１１ａ、１１ｂ、１１ｃ）に塗液３を流入させ、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）に溜められた塗液３は、一の吐出口４において合流して吐出される。 As described above, in the first embodiment, the coating is applied to the plurality of manifolds 11 (11a, 11b, 11c) from the coating liquid supply port 16 (16a, 16b, 16c) via the bottom 17 (17a, 17b, 17c). The liquid 3 is made to flow in, and the coating liquids 3 stored in the three manifolds 11 (11a, 11b, 11c) are merged and discharged at one discharge port 4.
　スリットダイ１において、３個のマニホールド１１（１１ａ、１１ｂ、１１ｃ）を区切っているのは、シム１５である。このシム１５について、詳しく説明する。シム１５は図３（ａ）、（ｂ）に示すように、スリットダイ１の両端部に吐出口４まで延びる端部突起部１８（１８ａ、１８ｂ）を有するとともに、各マニホールド１１（１１ａ、１１ｂ、１１ｃ）間にそれぞれ各マニホールド１１（１１ａ、１１ｂ、１１ｃ）よりも吐出口４方向に延びた中間突起部１９（１９ａ、１９ｂ）を有した櫛歯状の形状を有している。シム１５の幅方向（Ｙ方向）の長さは、スリットダイ１の幅方向の長さとほぼ同じであり、厚さ方向（Ｚ方向）の長さは、スリット１２の高さを規定する長さである。 In the slit die 1, it is the shim 15 that separates the three manifolds 11 (11a, 11b, 11c). The shim 15 will be described in detail. As shown in FIGS. 3A and 3B, the shim 15 has end protrusions 18 (18a, 18b) extending to the discharge port 4 at both ends of the slit die 1, and each manifold 11 (11a, 11b). , 11c) each have a comb-like shape having intermediate protrusions 19 (19a, 19b) extending from the manifolds 11 (11a, 11b, 11c) in the four directions of the discharge port. The length of the shim 15 in the width direction (Y direction) is substantially the same as the length of the slit die 1 in the width direction, and the length in the thickness direction (Z direction) defines the height of the slit 12. Is.
　端部突起部１８（１８ａ、１８ｂ）のＴＤ方向と直交するＸ方向の長さは、スリットダイ１のＸ方向の長さとほぼ同じである。中間突起部１９（１９ａ、１９ｂ）のＸ方向の長さは、各マニホールド１１（１１ａ、１１ｂ、１１ｃ）よりも吐出口４方向に延び、端部突起部１８（１８ａ、１８ｂ）よりも短く構成されている。また、中間突起部１８（１８ａ、１８ｂ）の吐出口４（Ｘ方向）側の端部は、吐出口４方向と直交する方向に直線的に構成されている。これらの構成により、各マニホールド１１（１１ａ、１１ｂ、１１ｃ）に溜められた塗液３が吐出口４まで到達する前のスリット１２において合流することができ、滑らかで安定した塗工をすることができる。 The length of the end protrusions 18 (18a, 18b) in the X direction orthogonal to the TD direction is almost the same as the length of the slit die 1 in the X direction. The length of the intermediate protrusions 19 (19a, 19b) in the X direction extends in the discharge port 4 directions from each manifold 11 (11a, 11b, 11c) and is shorter than the end protrusions 18 (18a, 18b). Has been done. Further, the ends of the intermediate protrusions 18 (18a, 18b) on the discharge port 4 (X direction) side are formed linearly in a direction orthogonal to the discharge port 4 direction. With these configurations, the coating liquid 3 stored in each manifold 11 (11a, 11b, 11c) can be merged in the slit 12 before reaching the discharge port 4, and smooth and stable coating can be performed. can.
　また、中間突起部１９（１９ａ、１９ｂ）があることにより、各マニホールド１１（１１ａ、１１ｂ、１１ｃ）間が区切られて独立した各マニホールド１１（１１ａ、１１ｂ、１１ｃ）を構成している。各マニホールド１１（１１ａ、１１ｂ、１１ｃ）が独立し、それぞれ別のバルブ２４（２４ａ、２４ｂ、２４ｃ）から塗液３を供給することにより、各マニホールド１１（１１ａ、１１ｂ、１１ｃ）からスリット１２へ流れる塗液３の量を制御しやすくできる。また、中間突起部１９（１９ａ、１９ｂ）のＸ方向の長さを端部突起部１８（１８ａ、１８ｂ）よりも短く構成することにより、各マニホールド１１（１１ａ、１１ｂ、１１ｃ）から流出する塗液３が吐出口４に到達する前のスリット１２で合流しやすくできる。これらの構成により、吐出する塗液３の量を幅方向において、顕著に制御することができるとともに、マニホールド１１（１１ａ、１１ｂ、１１ｃ）毎に塗液３の量が不連続に変化することがないため塗工膜に窪みが生じることがなく、塗工した膜厚を一定にすることが可能とすることができる。 Further, due to the presence of the intermediate protrusions 19 (19a, 19b), the manifolds 11 (11a, 11b, 11c) are separated to form independent manifolds 11 (11a, 11b, 11c). Each manifold 11 (11a, 11b, 11c) becomes independent, and by supplying the coating liquid 3 from different valves 24 (24a, 24b, 24c), each manifold 11 (11a, 11b, 11c) becomes a slit 12. The amount of the flowing coating liquid 3 can be easily controlled. Further, by making the length of the intermediate protrusions 19 (19a, 19b) in the X direction shorter than that of the end protrusions 18 (18a, 18b), the coating that flows out from each manifold 11 (11a, 11b, 11c) The liquid 3 can be easily merged in the slit 12 before reaching the discharge port 4. With these configurations, the amount of the coating liquid 3 to be discharged can be remarkably controlled in the width direction, and the amount of the coating liquid 3 can be discontinuously changed for each of the manifolds 11 (11a, 11b, 11c). Since there is no dent in the coating film, it is possible to keep the coated film thickness constant.
　なお、実施例１においては、マニホールドの数を３個とし、それぞれ均等に同じ幅方向の長さを有して設けられた構成としたが、必ずしもこれに限定されず適宜変更が可能である。例えば、マニホールドの数を２個としてもよいし、４個以上としてもよい。また、マニホールド間の長さは均等ではなく、いずれかのマニホールドの幅方向の長さを長く構成するように構成してもよい。つまり、スリットダイ１の幅方向の長さに基づき、膜厚制御が可能になるように、マニホールド数、及び各マニホールドの長さを決めればよい。また、マニホールドの数に基づいて、中間突起部及び塗液供給口の数を決めればよい。 In the first embodiment, the number of manifolds is set to three, and the configurations are provided so as to have the same length in the width direction, but the configuration is not necessarily limited to this and can be changed as appropriate. For example, the number of manifolds may be two or four or more. Further, the lengths between the manifolds are not uniform, and the length in the width direction of any of the manifolds may be long. That is, the number of manifolds and the length of each manifold may be determined so that the film thickness can be controlled based on the length of the slit die 1 in the width direction. Further, the number of intermediate protrusions and the number of coating liquid supply ports may be determined based on the number of manifolds.
　また、実施例１においては、複数のマニホールド１１（１１ａ、１１ｂ、１１ｃ）に溜められている塗液３をスリット１２および吐出口４を通じて基材２へと流す方向は水平方向としたが、必ずしもこれに限定されず適宜変更が可能である。例えば、垂直方向（上方向又は下方向）としてもよいし、斜め方向としてもよい。 Further, in the first embodiment, the direction in which the coating liquid 3 stored in the plurality of manifolds 11 (11a, 11b, 11c) flows to the base material 2 through the slit 12 and the discharge port 4 is a horizontal direction, but it is not always the case. Not limited to this, it can be changed as appropriate. For example, it may be in the vertical direction (upward or downward) or diagonally.
　さらに、実施例１においては、バルブ２４（２４ａ、２４ｂ、２４ｃ）により、各マニホールド１１（１１ａ、１１ｂ、１１ｃ）に流入する塗液３の量を制御するように構成したが、必ずしもこれに限定されず適宜変更が可能である。例えば、バルブ２４（２４ａ、２４ｂ、２４ｃ）に替えて、３個のポンプをそれぞれ各マニホールド１１（１１ａ、１１ｂ、１１ｃ）に接続して流入する塗液３の量を制御するように構成してもよい。 Further, in the first embodiment, the valve 24 (24a, 24b, 24c) is configured to control the amount of the coating liquid 3 flowing into each manifold 11 (11a, 11b, 11c), but the present invention is not necessarily limited to this. It can be changed as appropriate. For example, instead of the valves 24 (24a, 24b, 24c), three pumps are connected to the respective manifolds 11 (11a, 11b, 11c) to control the amount of the inflowing liquid 3. May be good.
　また、実施例１におけるスリットダイ１は、固定されており、ローツーロールで搬送される基材２に塗液３を塗工する構成としたが、必ずしもこれに限定されず適宜変更が可能である。例えば、静止している個片の基材にスリットダイ１が移動して塗液３を塗工するように構成してもよい。 Further, the slit die 1 in the first embodiment is fixed and has a configuration in which the coating liquid 3 is applied to the base material 2 transported by low-to-roll, but the present invention is not necessarily limited to this and can be changed as appropriate. be. For example, the slit die 1 may move to a stationary piece of base material to coat the coating liquid 3.
　このように、実施例１においては、塗液を基材に吐出するスリットダイであって、
　それぞれが塗液を溜める空間であり、幅方向に設けられた複数のマニホールドと、
　前記複数のマニホールドにそれぞれ塗液を供給する複数の塗液供給口と、
　前記幅方向に広いスリットを経由して当該複数のマニホールドと繋がり、塗液を基材に対して吐出する一の吐出口と、
　前記スリットの高さを構成するために設けられたシムと、を備え、
　前記シムは、当該スリットダイの両端部に前記吐出口まで延びる端部突起部を有するとともに、各マニホールド間にそれぞれ各マニホールドよりも前記吐出口方向に延びた中間突起部を有したことを特徴とするスリットダイにより、幅方向の吐出量を制御することが可能で、品質がよく厚さが均一な塗工膜を塗工することができる。 As described above, in the first embodiment, the slit die that discharges the coating liquid onto the base material is used.
Each is a space for storing the coating liquid, and there are multiple manifolds provided in the width direction,
A plurality of coating liquid supply ports for supplying coating liquid to the plurality of manifolds, respectively.
A single discharge port that is connected to the plurality of manifolds via a slit that is wide in the width direction and discharges the coating liquid to the base material.
With a shim provided to form the height of the slit,
The shim is characterized in that both ends of the slit die have end protrusions extending to the discharge port, and each manifold has intermediate protrusions extending from each manifold in the direction of the discharge port. It is possible to control the discharge amount in the width direction by using the slit die, and it is possible to apply a coating film having good quality and a uniform thickness.
本発明の実施例２は、中間突起部が吐出口方向に向かって幅が細くなる幅方向テーパ形状を有している点で、実施例１と異なっている。実施例２について、図４を参照して説明する。図４は、本発明の実施例２における（ａ）はｂ矢視図で、（ｂ）はシム１１５の平面図である。 The second embodiment of the present invention is different from the first embodiment in that the intermediate protrusion has a tapered shape in the width direction in which the width becomes narrower toward the discharge port. The second embodiment will be described with reference to FIG. 4A and 4B are a view taken along the line b in Example 2 of the present invention, and FIG. 4B is a plan view of the shim 115.
実施例２におけるスリットダイ１０１におけるスリット１１５は、図４（ａ）、（ｂ）に示すように、中間突起部１１９（１１９ａ、１１９ｂ）が、マニホールド１１（１１ａ、１１ｂ、１１ｃ）より吐出口４方向においてマニホールド１１（１１ａ、１１ｂ、１１ｃ）よりも吐出口４側から傾斜が開始して幅中心に向かってＹ方向の幅が直線的に細くなる幅方向テーパ形状を有している。これにより、複数のマニホールド１１（１１ａ、１１ｂ、１１ｃ）における塗液３が吐出口４のマニホールド１１（１１ａ、１１ｂ、１１ｃ）側で合流しやすく、安定した塗工膜を塗工することができる。 In the slit 115 of the slit die 101 in the second embodiment, as shown in FIGS. In the direction, it has a width taper shape in which the inclination starts from the discharge port 4 side of the manifold 11 (11a, 11b, 11c) and the width in the Y direction becomes linearly narrower toward the center of the width. As a result, the coating liquids 3 in the plurality of manifolds 11 (11a, 11b, 11c) can easily merge on the manifold 11 (11a, 11b, 11c) side of the discharge port 4, and a stable coating film can be applied. ..
なお、実施例２においては、中間突起部１１９（１１９ａ、１１９ｂ）の幅中心に向かって幅が直線的に細くなる幅方向テーパ形状を有している構成としたが、必ずしもこれに限定されず適宜変更が可能である。例えば、中間突起部１１９（１１９ａ、１１９ｂ）の幅中心に向かって幅が曲線的に細くなる幅方向テーパ形状を有している構成としてもよい。 In the second embodiment, the intermediate protrusion 119 (119a, 119b) has a tapered shape in the width direction in which the width linearly narrows toward the center of the width, but the present invention is not necessarily limited to this. It can be changed as appropriate. For example, the intermediate protrusion 119 (119a, 119b) may have a tapered shape in the width direction in which the width is curved toward the center of the width.
このように、実施例２においては、前記中間突起部は、前記吐出口方向に向かって幅が細くなる幅方向テーパ形状を有していることにより、複数のマニホールドにおける塗液が吐出口手前付近で合流しやすく、安定した塗工膜を塗工することができる。 As described above, in the second embodiment, the intermediate protrusion has a taper shape in the width direction in which the width becomes narrower toward the discharge port, so that the coating liquid in the plurality of manifolds is near the front of the discharge port. It is easy to merge and a stable coating film can be applied.
本発明の実施例３は、中間突起部における幅方向テーパ形状は、マニホールド内から吐出口方向に傾斜が開始する形状である点で実施例１、２と異なっている。実施例３について図５を参照して説明する。図５は、本発明の実施例３における（ａ）はｂ矢視図で、（ｂ）はシム２１５の平面図である。 The third embodiment of the present invention is different from the first and second embodiments in that the tapered shape in the width direction at the intermediate protrusion is a shape in which the inclination starts from the inside of the manifold in the discharge port direction. The third embodiment will be described with reference to FIG. 5A and 5B are a view taken along the line b in Example 3 of the present invention, and FIG. 5B is a plan view of the shim 215.
実施例３におけるスリットダイ２０１におけるスリット２１５は、図５（ａ）、（ｂ）に示すように、中間突起部２１９（２１９ａ、２１９ｂ）が、マニホールド１１（１１ａ、１１ｂ、１１ｃ）内から吐出口４方向に向かって、幅中心に向かって幅が直線的に細くなる幅方向テーパ形状を有している。これにより、複数のマニホールドにおける塗液が吐出口付近でさらに合流しやすく、安定した塗工膜を塗工することができる。 In the slit 215 of the slit die 201 in the third embodiment, as shown in FIGS. It has a tapered shape in the width direction in which the width linearly narrows toward the center of the width in four directions. As a result, the coating liquids in the plurality of manifolds can be more easily merged in the vicinity of the discharge port, and a stable coating film can be applied.
なお、実施例３においては、中間突起部２１９（２１９ａ、２１９ｂ）の幅が幅中心に向かって直線的に細くなる幅方向テーパ形状を有している構成としたが、必ずしもこれに限定されず適宜変更が可能である。例えば、中間突起部２１９（２１９ａ、２１９ｂ）の幅が幅中心に向かって曲線的に細くなる幅方向テーパ形状を有している構成としてもよい。 In the third embodiment, the width of the intermediate protrusions 219 (219a and 219b) has a taper shape in the width direction that is linearly narrowed toward the center of the width, but the present invention is not necessarily limited to this. It can be changed as appropriate. For example, the intermediate protrusions 219 (219a and 219b) may have a tapered shape in the width direction in which the width is curved toward the center of the width.
このように、実施例３においては、中間突起部における幅方向テーパ形状は、マニホールド内から吐出口方向に傾斜が開始する形状であることで、複数のマニホールドにおける塗液が吐出口手前付近でさらに合流しやすく、安定した塗工膜を塗工することができる。 As described above, in the third embodiment, the widthwise taper shape in the intermediate protrusion is a shape in which the inclination starts from the inside of the manifold toward the discharge port, so that the coating liquid in the plurality of manifolds is further applied in the vicinity of the front of the discharge port. It is easy to merge and a stable coating film can be applied.
本発明の実施例４は、中間突起部における幅方向テーパ形状は、階段形状である点で実施例１～３と異なっている。実施例４について図６を参照して説明する。図６は、本発明の実施例４における（ａ）はｂ矢視図で、（ｂ）はシム３１５の平面図である。 Example 4 of the present invention is different from Examples 1 to 3 in that the tapered shape in the width direction at the intermediate protrusion is a stepped shape. The fourth embodiment will be described with reference to FIG. 6A and 6B are views taken along the arrow b in Example 4 of the present invention, and FIG. 6B is a plan view of the shim 315.
実施例４におけるスリットダイ３０１におけるスリット３１５は、図６（ａ）、（ｂ）に示すように、中間突起部３１９（３１９ａ、３１９ｂ）が、マニホールド１１（１１ａ、１１ｂ、１１ｃ）より吐出口方向においてマニホールド１１（１１ａ、１１ｂ、１１ｃ）よりも吐出口４側から傾斜が開始して幅が幅中心に向かって階段状に細くなる幅方向テーパ形状を有している。これにより、複数のマニホールドの独立性を保ちつつ、塗液が吐出口手前付近で合流しやすく、安定した塗工膜を塗工することができる。 In the slit 315 of the slit die 301 in the fourth embodiment, as shown in FIGS. It has a tapered shape in the width direction in which the inclination starts from the discharge port 4 side of the manifold 11 (11a, 11b, 11c) and the width becomes narrower in a stepwise manner toward the center of the width. As a result, while maintaining the independence of the plurality of manifolds, the coating liquid can easily merge in the vicinity of the front of the discharge port, and a stable coating film can be applied.
なお、実施例４においては、中間突起部３１９（３１９ａ、３１９ｂ）が、マニホールド１１（１１ａ、１１ｂ、１１ｃ）より吐出口方向においてマニホールド１１（１１ａ、１１ｂ、１１ｃ）よりも吐出口４側から傾斜が開始して幅が幅中心に向かって階段状に細くなる幅方向テーパ形状を有しているように構成したが、必ずしもこれに限定されず適宜変更が可能である。例えば、マニホールド１１（１１ａ、１１ｂ、１１ｃ）内、すなわち、中間突起部３１９（３１９ａ、３１９ｂ）の根元から吐出口４方向に向かって、幅中心に向かって幅が階段状に細くなる幅方向テーパ形状を有した構成としてもよい。 In the fourth embodiment, the intermediate protrusions 319 (319a, 319b) are inclined from the discharge port 4 side of the manifold 11 (11a, 11b, 11c) in the discharge port direction from the manifold 11 (11a, 11b, 11c). Is configured to have a taper shape in the width direction in which the width gradually narrows toward the center of the width, but the present invention is not necessarily limited to this and can be changed as appropriate. For example, in the manifold 11 (11a, 11b, 11c), that is, from the root of the intermediate protrusion 319 (319a, 319b) toward the discharge port 4, the width is tapered in a stepwise manner toward the center of the width. It may have a shape.
このように、実施例４においては、中間突起部における幅方向テーパ形状は、階段形状であることで、複数のマニホールドの独立性を保ちつつ、塗液が吐出口手前付近で合流しやすく、安定した塗工膜を塗工することができる。 As described above, in the fourth embodiment, the widthwise taper shape in the intermediate protrusion is a stepped shape, so that the coating liquid easily merges in the vicinity of the discharge port and is stable while maintaining the independence of the plurality of manifolds. The coated coating film can be applied.
本発明の実施例５は、中間突起部が吐出口方向に向かって厚みが薄くなる厚み方向テーパ形状を有している点で実施例１～４と異なっている。実施例５について図７を参照して説明する。図７は、本発明の実施例５におけるａ矢視図である。 Example 5 of the present invention is different from Examples 1 to 4 in that the intermediate protrusion has a thickness-direction taper shape in which the thickness decreases toward the discharge port. The fifth embodiment will be described with reference to FIG. FIG. 7 is a view taken along the line a in Example 5 of the present invention.
実施例５におけるスリットダイ４０１におけるスリット４１５は、図７に示すように、中間突起部４１９（４１９ａ、４１９ｂ）が、マニホールド１１（１１ａ、１１ｂ、１１ｃ）より吐出口４方向においてマニホールド１１（１１ａ、１１ｂ、１１ｃ）よりも吐出口４側から傾斜を開始してＺ方向の厚みが厚み中心に向かって直線的に薄くなる厚み方向テーパ形状を有している。これにより、複数のマニホールドにおける塗液が吐出口手前付近でさらに合流しやすく、安定した塗工膜を塗工することができる。 In the slit 415 of the slit die 401 in the fifth embodiment, as shown in FIG. 7, the intermediate protrusions 419 (419a, 419b) have the manifold 11 (11a, 11a) in the discharge port 4 direction from the manifold 11 (11a, 11b, 11c). It has a thickness-direction taper shape in which the thickness in the Z direction is linearly reduced toward the center of the thickness by starting the inclination from the discharge port 4 side with respect to 11b and 11c). As a result, the coating liquids in the plurality of manifolds can be more easily merged in the vicinity of the front of the discharge port, and a stable coating film can be applied.
なお、実施例５においては、中間突起部４１９（４１９ａ、４１９ｂ）が、マニホールド１１（１１ａ、１１ｂ、１１ｃ）より吐出口方向においてマニホールド１１（１１ａ、１１ｂ、１１ｃ）よりも吐出口４側から傾斜を開始して厚みが厚み中心に向かって直線的に薄くなる幅方向テーパ形状を有しているように構成したが、必ずしもこれに限定されず適宜変更が可能である。例えば、マニホールド１１（１１ａ、１１ｂ、１１ｃ）内、すなわち、中間突起部４１９（４１９ａ、４１９ｂ）の根元から吐出口４方向に向かって、厚みが厚み中心に向かって曲線的に薄くなる厚み方向テーパ形状を有した構成としてもよいし、階段状に薄くなる厚み方向テーパ形状を有した構成としてもよい。 In the fifth embodiment, the intermediate protrusions 419 (419a, 419b) are inclined from the discharge port 4 side of the manifold 11 (11a, 11b, 11c) in the discharge port direction from the manifold 11 (11a, 11b, 11c). Is configured to have a taper shape in the width direction in which the thickness decreases linearly toward the center of the thickness, but the thickness is not necessarily limited to this and can be changed as appropriate. For example, the thickness direction taper in the manifold 11 (11a, 11b, 11c), that is, from the root of the intermediate protrusion 419 (419a, 419b) toward the discharge port 4 direction, the thickness is curvedly reduced toward the thickness center. It may have a shape, or it may have a taper shape in the thickness direction that becomes thinner in a stepped manner.
このように、実施例５においては、中間突起部が吐出口方向に向かって厚みが薄くなる厚み方向テーパ形状を有していることで、複数のマニホールドにおける塗液が吐出口手前付近でさらに合流しやすく、安定した塗工膜を塗工することができる。 As described above, in the fifth embodiment, since the intermediate protrusion has a taper shape in the thickness direction in which the thickness decreases toward the discharge port, the coating liquids in the plurality of manifolds further merge in the vicinity of the front of the discharge port. It is easy to apply and a stable coating film can be applied.
本発明の実施例６は、マニホールド毎に塗液供給口を複数備え、一つのマニホールドにおける複数の塗液供給口は、供給される塗液の流量の範囲が互いに異なる点で、実施例１～５と異なっている。 In the sixth embodiment of the present invention, a plurality of coating liquid supply ports are provided for each manifold, and the plurality of coating liquid supply ports in one manifold have different flow rate ranges of the coated liquid from each other. It is different from 5.
実施例６における図示しないスリットダイは、マニホールド１１（１１ａ、１１ｂ、１１ｃ）毎に塗液供給口を２個備え、それぞれ別のバルブに接続され、互いに異なる塗液の流量を供給できるように構成している。この構成により、塗液流量の調節範囲を広くすることができ、均一な塗工膜を塗工することができる。 The slit die (not shown) in the sixth embodiment is provided with two coating liquid supply ports for each manifold 11 (11a, 11b, 11c), and is connected to different valves so as to be able to supply different flow rates of the coating liquid. doing. With this configuration, the adjustment range of the coating liquid flow rate can be widened, and a uniform coating film can be applied.
なお、実施例６においては、マニホールド１１（１１ａ、１１ｂ、１１ｃ）毎に塗液供給口を２個備え、それぞれ別のバルブに接続される構成としたが、必ずしもこれに限定されず適宜変更が可能である。例えば、マニホールド１１（１１ａ、１１ｂ、１１ｃ）毎に塗液供給口を２個備え、それぞれ別のポンプに接続される構成としてもよい。 In the sixth embodiment, two coating liquid supply ports are provided for each manifold 11 (11a, 11b, 11c) and are connected to different valves, but the configuration is not necessarily limited to this and can be changed as appropriate. It is possible. For example, each manifold 11 (11a, 11b, 11c) may be provided with two coating liquid supply ports, each of which is connected to a different pump.
また、実施例６においては、マニホールド１１（１１ａ、１１ｂ、１１ｃ）毎に塗液供給口を２個備える構成としたが、必ずしもこれに限定されず適宜変更が可能である。例えば、マニホールド１１（１１ａ、１１ｂ、１１ｃ）毎に塗液供給口を３個以上備える構成としてもよい。これにより、さらに、塗液流量の調節範囲を広くすることができる。 Further, in the sixth embodiment, the manifold 11 (11a, 11b, 11c) is provided with two coating liquid supply ports, but the configuration is not necessarily limited to this, and changes can be made as appropriate. For example, each manifold 11 (11a, 11b, 11c) may be provided with three or more coating liquid supply ports. Thereby, the adjustment range of the coating liquid flow rate can be further widened.
このように、実施例６においては、マニホールド毎に塗液供給口を複数備え、一つのマニホールドにおける複数の塗液供給口は、供給される塗液の流量の範囲が互いに異なることで、塗液流量の調節範囲を広くすることができ、均一な塗工膜を塗工することができる。 As described above, in the sixth embodiment, a plurality of coating liquid supply ports are provided for each manifold, and the plurality of coating liquid supply ports in one manifold have different coating liquid flow rate ranges. The flow rate adjustment range can be widened, and a uniform coating film can be applied.
本発明は、基材に塗液を塗工するスリットダイに幅広く適用することができる。 The present invention can be widely applied to a slit die for applying a coating liquid to a base material.
１：スリットダイ　　２：基材　　３：塗液　　５：ローラ　　４：吐出口　　１１：マニホールド１１（１１ａ、１１ｂ、１１ｃ）　　１２：スリット　　１５：シム　　１６（１６ａ、１６ｂ、１６ｃ）：塗液供給口　　１７（１７ａ、１７ｂ、１７ｃ）：底部　　１８（１８ａ、１８ｂ）：端部突起部　　１９（１９ａ、１９ｂ、１９ｃ）：中間突起部　　２０：供給手段　　２２：タンク　　２３：ポンプ　　２４（２４ａ、２４ｂ、２４ｃ）：バルブ　　１０１：スリットダイ　　１１５：シム　　１１９（１１９ａ、１１９ｂ）：中間突起部　　２０１：スリットダイ　　２１５：シム　　２１９（２１９ａ、２１９ｂ）：中間突起部　　３０１：スリットダイ　　３１５：シム　　３１９（３１９ａ、３１９ｂ）：中間突起部　　  1: Slit die 2: Base material 3: Coating liquid 5: Roller 4: Discharge port 11: Manifold 11 (11a, 11b, 11c) 12: Slit 15: Sim 16 (16a, 16b, 16c): Coating liquid supply port 17 (17a, 17b, 17c): Bottom 18 (18a, 18b): End protrusion 19 (19a, 19b, 19c): Intermediate protrusion 20: Supply means 22: Tank 23: Pump 24 (24a, 24b, 24c) : Valve 101: Slit die 115: Sim 119 (119a, 119b): Intermediate protrusion 201: Slit die 215: Sim 219 (219a, 219b): Intermediate protrusion 301: Slit die 315: Sim 319 (319a, 319b): Intermediate protrusion

Claims (6)

  1. 　塗液を基材に吐出するスリットダイであって、
    　それぞれが塗液を溜める空間であり、幅方向に設けられた複数のマニホールドと、
    　前記複数のマニホールドにそれぞれ塗液を供給する複数の塗液供給口と、
    　前記幅方向に広いスリットを経由して当該複数のマニホールドと繋がり、塗液を基材に対して吐出する一の吐出口と、
    　前記スリットの高さを構成するために設けられたシムと、を備え、
    　前記シムは、当該スリットダイの両端部に前記吐出口まで延びる端部突起部を有するとともに、各マニホールド間にそれぞれ各マニホールドよりも前記吐出口方向に延びた中間突起部を有したことを特徴とするスリットダイ。     A slit die that discharges the coating liquid onto the base material.
    Each is a space for storing the coating liquid, and there are multiple manifolds provided in the width direction,
    A plurality of coating liquid supply ports for supplying coating liquid to the plurality of manifolds, respectively.
    A single discharge port that is connected to the plurality of manifolds via a slit that is wide in the width direction and discharges the coating liquid to the base material.
    With a shim provided to form the height of the slit,
    The shim is characterized in that it has end protrusions extending to the discharge port at both ends of the slit die and intermediate protrusions extending from each manifold in the direction of the discharge port between the manifolds. Slit die to do.
  2. 　前記中間突起部は、前記吐出口方向に向かって幅が細くなる幅方向テーパ形状を有している請求項１に記載のスリットダイ。 The slit die according to claim 1, wherein the intermediate protrusion has a tapered shape in the width direction in which the width becomes narrower toward the discharge port.
  3. 　前記中間突起部における前記幅方向テーパ形状は、前記マニホールド内から吐出口方向に傾斜が開始する形状であることを特徴とする請求項２に記載のスリットダイ。 The slit die according to claim 2, wherein the tapered shape in the width direction of the intermediate protrusion portion is a shape in which inclination starts in the discharge port direction from the inside of the manifold.
  4. 　前記中間突起部における前記幅方向テーパ形状は、階段形状であることを特徴とする請求項２又は３に記載のスリットダイ。 The slit die according to claim 2 or 3, wherein the widthwise taper shape in the intermediate protrusion is a stepped shape.
  5. 　前記中間突起部は、前記吐出口方向に向かって厚みが薄くなる厚み方向テーパ形状を有している請求項１～４のいずれかに記載のスリットダイ。 The slit die according to any one of claims 1 to 4, wherein the intermediate protrusion has a thickness-direction taper shape in which the thickness decreases toward the discharge port.
  6. 　前記マニホールド毎に前記塗液供給口を複数備え、
    　一つの前記マニホールドにおける複数の前記塗液供給口は、供給される塗液の流量の範囲が互いに異なることを特徴とする請求項１～５のいずれかに記載のスリットダイ。     Each manifold is provided with a plurality of the coating liquid supply ports.
    The slit die according to any one of claims 1 to 5, wherein the plurality of coating liquid supply ports in one manifold have different flow rate ranges of the supplied coating liquid.
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