WO2021010057A1 - Intermittent coating apparatus - Google Patents

Intermittent coating apparatus Download PDF

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Publication number
WO2021010057A1
WO2021010057A1 PCT/JP2020/022678 JP2020022678W WO2021010057A1 WO 2021010057 A1 WO2021010057 A1 WO 2021010057A1 JP 2020022678 W JP2020022678 W JP 2020022678W WO 2021010057 A1 WO2021010057 A1 WO 2021010057A1
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WO
WIPO (PCT)
Prior art keywords
coating
coating liquid
liquid supply
valve
flow path
Prior art date
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PCT/JP2020/022678
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French (fr)
Japanese (ja)
Inventor
健太 横井
栗秋　武史
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東レエンジニアリング株式会社
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Publication of WO2021010057A1 publication Critical patent/WO2021010057A1/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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means

Definitions

  • the present invention relates to an intermittent coating device that intermittently applies a coating liquid to a substrate that is continuously conveyed.
  • the electrode material (coating liquid) is repeatedly discharged and stopped from a slit nozzle at a predetermined interval.
  • intermittent coating for example, Patent Documents 1 and 2.
  • the coating liquid is continuously pumped from the coating liquid tank by the liquid feeding pump, and the coating liquid pumped from the liquid feeding pump is supplied to the slit nozzle (that is, the supply valve) and the coating liquid is supplied again. Intermittent coating is performed by switching the valve that collects in the coating liquid tank (that is, the collecting valve).
  • Patent Document 2 a technique for suppressing the swelling of the coating start end and the coating end of the intermittent coating has been proposed (for example, Patent Document 2).
  • JP 2012-047245 Japanese Unexamined Patent Publication No. 2014-188426 JP-A-2017-223280
  • the recovery valve operates (or the supply valve is opened) with the supply valve open. (The recovery valve operates immediately before the state is reached), which may cause turbulence in the pressure inside the pipe due to the drive or impact of the recovery valve, resulting in uneven thickness.
  • Patent Document 3 is a technique for operating a variable actuator at a pre-programmed timing and speed (so-called active method).
  • the operation start timing of each part is deviated due to the time-dependent change of the coating liquid viscosity, the time-dependent change of the response speed of the coating valve and the variable actuator, and the deviation of the scan time of the controller. Due to these timing deviations, the pressure in the coating liquid flow path rises or falls too much and cannot be kept within the desired range, and the pressure in the coating nozzle becomes higher than the reference value. As shown in FIG. 5, the lowering or lowering causes an excessive supply or insufficient supply of the coating liquid, resulting in swelling of the coating start end and the coating end end of the intermittent coating (due to the excessive supply of the coating liquid). Causes dents (due to insufficient supply of coating liquid). Note that FIG.
  • FIG. 5 illustrates the profile of the coating liquid intermittently applied on the base material S while continuously transporting the base material S in the direction indicated by the arrow v, and the target shape is a solid line, and there are ridges and dents. Illustrated by the dashed line.
  • intermittent coating is performed without using a recovery valve to increase the transfer speed of the base material, and even if the opening / closing speed of the on-off valve is increased, the coating start end and the coating end end of the intermittent coating are applied. It is an object of the present invention to provide an intermittent coating device capable of effectively suppressing swelling and dents.
  • one aspect of the present invention is It is an intermittent coating device that intermittently applies a coating liquid to a base material.
  • a coating nozzle that discharges the coating liquid toward the base material,
  • a coating liquid supply unit that supplies the coating liquid to the coating nozzle,
  • An open / close valve that is placed in the coating liquid supply flow path between the coating nozzle and the coating liquid supply unit to switch between supplying and stopping the coating liquid.
  • a liquid pool portion for retaining the inflowing coating liquid is provided.
  • the liquid pool is passive to the pressure change in the coating liquid supply flow path caused by the switching operation of the open / close valve, and the volume of the liquid pool is changed to adjust the pressure fluctuation in the coating liquid supply flow path. It is an intermittent coating device characterized by having a pressure receiving volume variable portion.
  • the transfer speed of the base material is high (that is, the interval of intermittent coating is short)
  • the swelling and denting of the start end portion and the end end portion of the intermittent coating can be reliably suppressed. ..
  • the recovery valve since the recovery valve is not used, it is possible to prevent the occurrence of thickness unevenness due to the driving and impact of the recovery valve.
  • the transfer speed of the base material can be increased, and the productivity can be improved.
  • the transport direction of the work W is expressed as the MD direction
  • the width direction orthogonal to the transport direction is expressed as the TD direction.
  • FIG. 1 is a schematic view showing an overall configuration of an example of a form embodying the present invention.
  • FIG. 1 shows a schematic view of the intermittent coating device 1 according to the present invention.
  • the intermittent coating device 1 intermittently coats the coating liquid L on the base material S.
  • the intermittent coating device 1 includes a coating nozzle 2, a coating liquid supply unit 3, an opening / closing valve 4, a liquid pool portion 5, a pressure receiving volume variable unit 6, a control unit CN, and the like.
  • the coating nozzle 2 discharges the coating liquid L toward the base material S.
  • the coating nozzle 2 includes a supply port 21 for supplying the coating liquid L, a discharge port 22 for discharging the coating liquid L, and a manifold 23 for communicating the supply port and the discharge port.
  • the coating nozzle 2 can be exemplified by a structure called a slit nozzle or a slit die, and when the coating liquid L is pumped and supplied to the supply port 21, the coating liquid L is supplied from the elongated slit-shaped discharge portion 23. Is pushed out and discharged.
  • the coating liquid supply unit 3 supplies the coating liquid L to the coating nozzle 2.
  • the coating liquid supply unit 3 includes a coating liquid tank 30, a liquid feeding pump 31, and a coating liquid supply flow path 32.
  • the coating liquid tank 30 stores (also called filling) the coating liquid L.
  • the liquid feed pump 31 pumps the coating liquid L stored in the coating liquid tank 30 to the coating nozzle 2.
  • the liquid feed pump 31 can be exemplified by pumping the coating liquid L by the rotational force of the motor, such as a gear pump, a mono pump, a rotary vane pump, and a scroll pump.
  • the coating liquid supply flow path 32 connects the coating liquid supply port of the coating nozzle 2 and the discharge port of the liquid feeding pump 31, and supplies the coating liquid L from the liquid feeding pump 31 to the coating nozzle 2.
  • the coating liquid supply flow path 32 is composed of metal pipes such as stainless steel and brass, as well as resin pipes called hoses and tubes.
  • an L-shaped joint, a T-shaped joint, or the like is arranged in the middle of the flow path (also referred to as a piping path, a path, or a route) as needed.
  • FIG. 2 is a perspective view showing a main part of an example of a form embodying the present invention.
  • FIG. 2A shows a schematic view of a state in which the on-off valve 4 is shifted from the closed state to the open state (moved in the direction indicated by the arrow D1) and the volume of the liquid pool portion 5 is reduced.
  • FIG. 2B shows a schematic view of a state in which the on-off valve 4 is moved from the open state to the closed state (moved in the direction indicated by the arrow D2) and the volume of the liquid pool portion 5 is increased. There is.
  • the on-off valve 4 is arranged in the coating liquid supply flow path 32 between the coating nozzle 2 and the coating liquid supply unit 3 to switch the supply / stop of the coating liquid L.
  • the on-off valve 4 includes a valve body 41, a rod 42, and an air cylinder 43.
  • the valve body 41 is arranged in the middle of the path of the coating liquid supply flow path 32, and switches the supply / stop of the coating liquid L by communicating or blocking the flow path.
  • the air cylinder 43 reciprocates the rod 42 to which the valve body 41 is connected, and by switching the pressure direction of the driving air, the valve body 41 is switched between the open state and the closed state.
  • a solenoid valve solenoid valve connected to the control unit CN is used to supply compressed air to the port 43a and release the port 43b to the atmosphere, or vice versa. Can be switched.
  • the liquid pool portion 5 retains the inflowing coating liquid L in the coating liquid supply flow path 32 between the coating liquid supply unit 3 and the on-off valve 4.
  • the liquid pool portion 5 has a tubular space that is communicated with the coating liquid supply flow path 32. More specifically, the liquid pool portion 5 is arranged at the corner of the coating liquid supply flow path 32 in which the coating liquid L flows in an L shape, and the coating liquid L flows out in the inflow direction of the coating liquid L.
  • the direction and the liquid pool portion 5 are configured to be branched in a T shape. Further, the liquid pool portion 5 is provided with a pressure receiving volume variable portion 6.
  • the pressure receiving volume variable unit 6 is also called a pressure fluctuation adjusting unit, and is passive to the pressure change in the coating liquid supply flow path 32 generated by the switching operation of the on-off valve 4 to change the volume of the liquid pool portion 5.
  • the pressure fluctuation in the coating liquid supply flow path 32 is adjusted.
  • the pressure receiving volume variable portion 6 has a piston mechanism, and includes a piston portion 61 and an urging force applying portion 62.
  • the piston portion 61 increases or decreases the volume of the liquid pool portion 5 (that is, the amount of the liquid pool). Specifically, the piston portion 61 moves (so-called sliding) while being in close contact with the inner wall surface of the liquid pool portion 5. More specifically, the piston portion 61 is composed of a disk-shaped or columnar member, and a ring-shaped packing (also referred to as a seal or O-ring) is attached to the outer peripheral portion of the coating liquid L. It is configured so that it can move in the same direction as the outflow direction.
  • the urging force applying portion 62 adjusts the speed at which the piston portion 61 moves, and adjusts the degree of change in the position of the piston portion 61 (that is, the volume of the liquid pool portion 5). Specifically, the urging force applying unit 62 applies a predetermined urging force to the piston unit 61. More specifically, the urging force applying unit 62 is composed of an air cylinder.
  • the liquid feed pump 31 continues to operate. Therefore, if the on-off valve 4 is shifted from the closed state to the open state without applying the present invention, the pressure P1 in the coating liquid supply flow path 32 drops sharply, and a dent is likely to occur at the coating start end. Become. On the other hand, if the opening / closing valve 4 is shifted from the open state to the closed state without applying the present invention, the pressure P2 in the coating liquid supply flow path 32 rises sharply, and the end portion of the coating is likely to rise. ..
  • the pressure receiving volume variable portion 6 since the pressure receiving volume variable portion 6 according to the present invention has the piston mechanism as described above, it exhibits the following behavior according to the switching operation of the on-off valve 4. (1)
  • the opening / closing valve 4 is changed from the closed state to the open state by the switching operation, the pressure P1 in the coating liquid supply flow path 32 tries to suddenly drop, but the volume of the liquid pool portion 5 passively contracts. (That is, the piston portion 61 of the pressure receiving volume variable portion 6 moves in the direction indicated by the arrow d1) to promote the outflow of the coating liquid, and the decrease in the pressure P1 is alleviated. Therefore, the dent at the coating start end is reduced.
  • the pressure receiving volume variable portion 6 is passive to the pressure change in the coating liquid supply flow path 32 generated by the switching operation (that is, the opening / closing operation) of the opening / closing valve 4 (that is, if there is a pressure change, the pressure change is passive.
  • the volume of the liquid pool 5 By changing the volume of the liquid pool 5 (passively), the pressure fluctuation in the coating liquid supply flow path 32 is adjusted, and the swelling and dents that are likely to occur at the coating start end and the coating end end are generated. Can be prevented.
  • the control unit CN has, for example, the following functions. -The rotary motor to which the unwinding roll R1, the transport rolls R2 and R3, and the take-up roll R4 are attached is controlled to transport or stop the base material S at a predetermined speed in the direction indicated by the arrow v. The distance between the transport roll R2 and the coating nozzle 2 (so-called coating gap) is controlled. -Controls the operation / stop of the liquid feed pump 31, the rotation speed (that is, the liquid feed amount), and the like. -The open / closed state of the open / close valve 4 is switched and controlled at a predetermined timing. -Control the temperature, air volume, etc. of other equipment (for example, drying device DR).
  • control unit CN is composed of a computer, a programmable logic controller, etc. (that is, hardware) and its execution program, etc. (that is, software).
  • control unit CN includes a rotary motor to which the unwinding roll R1 or the like is attached, a mechanism for adjusting the coating gap, a liquid feed pump 31, a switching drive mechanism for the on-off valve 4, and the like, and signal input / output. It is connected via means and is configured to control the devices and mechanisms of each part based on the execution program.
  • the urging force applied to the piston portion 61 of the pressure receiving volume variable portion 6 may be configured such that a predetermined urging force is applied to the piston portion 61 by using a manual regulator, and the urging force varies depending on the transport speed and the type. It may be configured to be reset so that it will be added.
  • an electropneumatic regulator connected to the control unit CN can be used to automatically switch so that a predetermined urging force set in advance according to the transport speed and product type is applied. There may be.
  • the intermittent coating device 1 according to the present invention has a start end and an end end of intermittent coating even if the transport speed of the base material is high (that is, the interval of intermittent coating is short). It is possible to reliably suppress the swelling and denting of the portion. Further, since the intermittent coating device 1 according to the present invention does not use the recovery valve, it is possible to prevent the occurrence of thickness unevenness due to the drive or impact of the recovery valve. Therefore, the transfer speed of the base material can be increased while suppressing the swelling and denting of the start end portion and the end end portion of the intermittent coating, and the productivity can be improved.
  • the liquid pool portion 5 and the pressure receiving volume variable portion 6 are arranged at the corners of the substantially L-shaped coating liquid supply flow path 32, and the outflow direction of the coating liquid T and the liquid pool with respect to the supply direction of the coating liquid L.
  • the configuration in which the portion 5 is branched in a T shape and the moving directions d1 and d2 of the piston portion 61 of the pressure receiving volume variable portion 6 are directed to the outflow direction of the coating liquid L is illustrated.
  • the coating liquid L that flows into the liquid pool portion 5 or flows out from the liquid pool portion 5 is preferable because it flows smoothly without bias or stagnation.
  • the configuration is not limited to the above, and the pressure receiving volume variable portion 6 may be connected to the coating liquid supply flow path 32 in the arrangement shown in FIG.
  • FIG. 3 is a schematic view showing a main part of a modified example of a form embodying the present invention.
  • the pressure receiving volume variable portion 6 the liquid pool portion 5 and the pressure receiving volume variable portion 6 are connected so as to be orthogonal to the linear portion of the coating liquid supply flow path 32 to which the coating liquid L is sent.
  • An example is shown in which the piston portion 61 moves in the orthogonal direction.
  • the pressure receiving volume variable portion 6 the liquid pool portion 5 and the pressure receiving volume variable portion 6 are connected to the L-shaped corner portion of the coating liquid supply flow path 32 to which the coating liquid L is sent.
  • the configuration in which the piston portion 61 moves in the same direction as the direction in which the coating liquid L is supplied is illustrated.
  • the arrangement of the pressure receiving volume variable portion 6 connected to the coating liquid supply flow path 32 depends on the length and handling of the coating liquid supply flow path 32, the volume of the liquid pool portion 5, and the time of the coating liquid L. It can be appropriately set according to the flow rate per hit, the intermittent switching interval, and the like.
  • the pressure receiving volume variable portion 6 As the pressure receiving volume variable portion 6 according to the present invention, a mode having a piston mechanism for changing the volume of the liquid pool portion 5 by the difference between the pressure in the coating liquid supply flow path 32 and the urging force is illustrated.
  • the urging force exerted on the piston portion 61 of the piston mechanism can be set by adjusting the pressure of the fluid applied to the air cylinder of the urging force applying portion 62, and the liquid pool portion 5 This is preferable because the urging force can be kept constant even if the volume of the cylinder fluctuates.
  • the pressure receiving volume variable portion 6 is not limited to such a form, and is provided with a balloon mechanism that changes the volume of the liquid pool portion 5 by the difference between the pressure in the coating liquid supply flow path and the urging force. Is also good.
  • FIG. 4 is a schematic view showing a main part of an example of another embodiment embodying the present invention, and an example of a balloon mechanism is shown.
  • the balloon mechanism is provided with a deformable diaphragm 66 and changes the volume of the liquid pool portion 5, and is for taking the coating liquid L into the liquid collecting portion 5 and pushing it back to the coating liquid supply flow path 32. is there.
  • the diaphragm 66 forms a part of the inner wall of the liquid pool portion 5, and has a structure that is deformed by the difference between the pressure in the coating liquid supply flow path 32 and the external pressure P3.
  • the diaphragm 66 is made of elastic rubber, an elastomer, or the like. Therefore, a force that the external pressure P3 pushes the diaphragm 66 and a force that the diaphragm 66 tries to contract are applied to the diaphragm 66 as an urging force.
  • FIG. 4A shows a schematic view of a state in which the on-off valve 4 is shifted from the closed state to the open state (moved in the direction indicated by the arrow D1) and the volume of the liquid pool portion 5 is reduced.
  • the on-off valve 4 When the on-off valve 4 is moved from the closed state to the open state, the pressure P1 in the coating liquid supply flow path 32 tries to suddenly drop, but the accumulating portion 5 passively differs from the urging force applied to the diaphragm 66.
  • the volume of the coating liquid 66 contracts (that is, the diaphragm 66 moves in the direction indicated by the arrow d1) to promote the outflow of the coating liquid L, and the decrease in the pressure P1 in the coating liquid supply flow path 32 is alleviated. Therefore, the dent at the coating start end is reduced.
  • FIG. 4B shows a schematic view of a state in which the on-off valve 4 is moved from the open state to the closed state (moved in the direction indicated by the arrow D2) and the volume of the liquid pool portion 5 is increased. There is.
  • the on-off valve 4 When the on-off valve 4 is moved from the open state to the closed state, the pressure P2 in the coating liquid supply flow path 32 tries to rise sharply, but the liquid pool portion 5 passively differs from the urging force applied to the diaphragm 66.
  • the volume of the coating liquid L is expanded (that is, the piston portion 61 moves in the direction indicated by the arrow d2) to prevent the coating liquid L from flowing out, and the increase in the pressure P2 in the coating liquid supply flow path 32 is alleviated. Therefore, the swelling at the end of coating is reduced.
  • the external pressure P3 of the diaphragm 66 may be atmospheric pressure, or the inside of the housing 67 forming the closed space may be pressurized or depressurized. Then, if the inside of the housing 67 is pressurized, the liquid pool portion 5 can be made difficult to expand and can be easily contracted. On the other hand, the inside of the housing 67 can be depressurized to facilitate the expansion of the liquid pool portion 5 and to make it difficult to shrink.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating Apparatus (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

Provided is an intermittent coating apparatus that can perform intermittent coating without using a recovery valve, increase conveying speed of a substrate, and effectively reduce protuberances and hollows at a coating start end and a coating termination end of the intermittent coating even when opening and closing speeds of an on/off valve are increased.　In particular, an intermittent coating apparatus for intermittently coating a substrate with a coating liquid includes: a coating nozzle for discharging the coating liquid toward the substrate; a coating liquid supply part for supplying the coating liquid to the coating nozzle; an on/off valve disposed in a coating liquid supply channel between the coating nozzle and the coating liquid supply part to switch on and off the supply of coating liquid; and a liquid reservoir part for reserving inflowing coating liquid in the coating liquid supply channel between the coating liquid supply part and the on/off valve. The liquid reservoir part includes a pressure-receiving volume-variable part for adjusting pressure fluctuations in the coating liquid supply channel by changing the volume of the liquid reservoir part in response to pressure changes in the coating liquid supply channel caused by a switching operation of the on/off valve.

Description

間欠塗布装置Intermittent coating device
　本発明は、連続搬送される基材に塗液を間欠的に塗布する間欠塗布装置に関するものである。 The present invention relates to an intermittent coating device that intermittently applies a coating liquid to a substrate that is continuously conveyed.
　従来から、電池用電極シートを製造するために、長尺の金属箔シート（つまり、基材）を連続搬送させながら、スリットノズルから所定の間隔で電極材料（塗液）の吐出と停止を繰り返して塗布する間欠塗布に関する技術が知られている（例えば、特許文献１，２）。そして、間欠塗布では、塗液タンクから送液ポンプで塗液を圧送し続けつつ、送液ポンプから圧送された塗液をスリットノズルに供給するバルブ（つまり、供給バルブ）と、塗液を再び塗液タンクに回収するバルブ（つまり、回収バルブ）とを切り替えて、間欠塗布を行っている。 Conventionally, in order to manufacture an electrode sheet for a battery, while continuously transporting a long metal leaf sheet (that is, a base material), the electrode material (coating liquid) is repeatedly discharged and stopped from a slit nozzle at a predetermined interval. There is a known technique for intermittent coating (for example, Patent Documents 1 and 2). Then, in intermittent coating, the coating liquid is continuously pumped from the coating liquid tank by the liquid feeding pump, and the coating liquid pumped from the liquid feeding pump is supplied to the slit nozzle (that is, the supply valve) and the coating liquid is supplied again. Intermittent coating is performed by switching the valve that collects in the coating liquid tank (that is, the collecting valve).
　さらに、間欠塗布の塗布開始端部や塗布終了端部の盛り上がりを抑制する技術が提案されている（例えば、特許文献２）。 Further, a technique for suppressing the swelling of the coating start end and the coating end of the intermittent coating has been proposed (for example, Patent Document 2).
特開２０１２－０４７２４５号公報JP 2012-047245. 特開２０１４－１８８４２６号公報Japanese Unexamined Patent Publication No. 2014-188426 特開２０１７－２２３２８０号公報JP-A-2017-223280
　特許文献１，２に開示されているような供給バルブと回収バルブが別体になっている構成の間欠塗工装置では、供給バルブが開状態で回収バルブが動作する（または、供給バルブが開状態になる直前に回収バルブが動作する）ことにより回収バルブの駆動や衝撃を起因とした配管内の圧力に乱れが発生し、厚みムラを生じる場合があった。 In the intermittent coating device having a configuration in which the supply valve and the recovery valve are separated as disclosed in Patent Documents 1 and 2, the recovery valve operates (or the supply valve is opened) with the supply valve open. (The recovery valve operates immediately before the state is reached), which may cause turbulence in the pressure inside the pipe due to the drive or impact of the recovery valve, resulting in uneven thickness.
　一方、特許文献３に開示された技術は、予めプログラミングされたタイミングや速度で可変アクチュエータを動作させるもの（いわゆるアクティブ方式）である。 On the other hand, the technique disclosed in Patent Document 3 is a technique for operating a variable actuator at a pre-programmed timing and speed (so-called active method).
　そのため、塗液粘度の経時変化、塗布バルブや可変アクチュエータの応答速度の経時変化、コントローラのスキャンタイムずれ等に起因して、各部の動作開始タイミングにずれが生じる。これらのタイミングのずれにより、塗液流路内の圧力が上昇し過ぎたり、減少しすぎたりして、所望の範囲内に収めることができなくなり、塗布ノズル内の圧力が基準値よりも高くなったり低くなったりすることで、図５に示す様に、塗液の供給過多や供給不足を引き起こし、間欠塗布の塗布開始端部や塗布終了端部の盛り上がり（塗液の供給過多に起因）や凹み（塗液の供給不足に起因）を生じさせる。なお図５には、矢印ｖに示す方向に基材Ｓを連続搬送させながら、基材Ｓ上に間欠塗布された塗液のプロファイルが例示されており、目標形状が実線で、盛り上がりや凹みが破線で例示されている。 Therefore, the operation start timing of each part is deviated due to the time-dependent change of the coating liquid viscosity, the time-dependent change of the response speed of the coating valve and the variable actuator, and the deviation of the scan time of the controller. Due to these timing deviations, the pressure in the coating liquid flow path rises or falls too much and cannot be kept within the desired range, and the pressure in the coating nozzle becomes higher than the reference value. As shown in FIG. 5, the lowering or lowering causes an excessive supply or insufficient supply of the coating liquid, resulting in swelling of the coating start end and the coating end end of the intermittent coating (due to the excessive supply of the coating liquid). Causes dents (due to insufficient supply of coating liquid). Note that FIG. 5 illustrates the profile of the coating liquid intermittently applied on the base material S while continuously transporting the base material S in the direction indicated by the arrow v, and the target shape is a solid line, and there are ridges and dents. Illustrated by the dashed line.
　しかもこのような現象（つまり、目標形状に対する盛り上がりや凹み）は、基材の搬送速度を上げ（つまり、間欠塗布の切り替え間隔が短くなり）、開閉バルブの開閉速度を速くしようとするにつれて顕著となる。つまり、従来技術では、所望の搬送速度に上げることに限界があり、生産性の向上を妨げる要因となっていた。 Moreover, such a phenomenon (that is, swelling or denting with respect to the target shape) becomes remarkable as the transfer speed of the base material is increased (that is, the switching interval of intermittent coating is shortened) and the opening / closing speed of the opening / closing valve is increased. Become. That is, in the prior art, there is a limit to increasing the desired transport speed, which is a factor that hinders the improvement of productivity.
　そこで本発明は、回収バルブを使用せずに間欠塗工を行い、基材の搬送速度を上げ、開閉バルブの開閉速度が速くなっても、間欠塗布の塗布開始端部や塗布終了端部の盛り上がりや凹みを効果的に抑制することができる、間欠塗布装置を提供することを目的としている。 Therefore, in the present invention, intermittent coating is performed without using a recovery valve to increase the transfer speed of the base material, and even if the opening / closing speed of the on-off valve is increased, the coating start end and the coating end end of the intermittent coating are applied. It is an object of the present invention to provide an intermittent coating device capable of effectively suppressing swelling and dents.
　以上の課題を解決するために、本発明に係る一態様は、
　基材に塗液を間欠的に塗布する間欠塗布装置であって、
　基材に向けて塗液を吐出させる塗布ノズルと、
　塗布ノズルに塗液を供給する塗液供給部と、
　塗布ノズルと塗液供給部との間の塗液供給流路内に配置されて、塗液の供給／停止を切り替える開閉バルブと、
　塗液供給部と開閉バルブとの間の塗液供給流路において、流入する塗液を滞留させる液溜まり部を備え、
　液溜まり部には、開閉バルブの切り替え動作で生じた塗液供給流路内の圧力変化に受動して、液溜まり部の容積を変化させることで当該塗液供給流路内の圧力変動を調節する、受圧容積可変部を備えたことを特徴とする、間欠塗布装置である。 In order to solve the above problems, one aspect of the present invention is
It is an intermittent coating device that intermittently applies a coating liquid to a base material.
A coating nozzle that discharges the coating liquid toward the base material,
A coating liquid supply unit that supplies the coating liquid to the coating nozzle,
An open / close valve that is placed in the coating liquid supply flow path between the coating nozzle and the coating liquid supply unit to switch between supplying and stopping the coating liquid.
In the coating liquid supply flow path between the coating liquid supply unit and the on-off valve, a liquid pool portion for retaining the inflowing coating liquid is provided.
The liquid pool is passive to the pressure change in the coating liquid supply flow path caused by the switching operation of the open / close valve, and the volume of the liquid pool is changed to adjust the pressure fluctuation in the coating liquid supply flow path. It is an intermittent coating device characterized by having a pressure receiving volume variable portion.
　上記の態様によれば、基材の搬送速度が速く（つまり、間欠塗布の間隔が短く）なっても、間欠塗布の開始端部や終了端部の盛り上がりおよび凹みを確実に抑制することができる。さらに、回収バルブを使用しないので、回収バルブの駆動や衝撃を起因とした厚みムラの発生を防ぐことができる。 According to the above aspect, even if the transfer speed of the base material is high (that is, the interval of intermittent coating is short), the swelling and denting of the start end portion and the end end portion of the intermittent coating can be reliably suppressed. .. Further, since the recovery valve is not used, it is possible to prevent the occurrence of thickness unevenness due to the driving and impact of the recovery valve.
　間欠塗布の開始端部や終了端部の盛り上がりおよび凹みを抑制しつつ、基材の搬送速度を速くすることができ、生産性の向上を図ることができる。 While suppressing the swelling and denting of the start end and the end end of the intermittent coating, the transfer speed of the base material can be increased, and the productivity can be improved.
本発明を具現化する形態の一例の全体構成を示す概略図である。It is the schematic which shows the whole structure of the example of the form which embodies the present invention. 本発明を具現化する形態の一例の要部を示す斜視図である。It is a perspective view which shows the main part of the example of the form which embodies the present invention. 本発明を具現化する形態の変形例の要部を示す概略図である。It is the schematic which shows the main part of the modification of the form which embodies the present invention. 本発明を具現化する別の形態の一例の要部を示す概略図である。It is the schematic which shows the main part of the example of another form which embodies the present invention. 間欠塗布の目標形状に対する塗布開始端部や塗布終了端部の盛り上がりや凹みの様子を示す図である。It is a figure which shows the state of the bulge and dent of the coating start end portion and the coating end end portion with respect to the target shape of intermittent coating.
　以下に、本発明を実施するための形態について、図を用いながら説明する。
なお、以下の説明では、ワークＷの搬送方向をＭＤ方向、搬送方向に直交する幅方向をＴＤ方向と表現する。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
In the following description, the transport direction of the work W is expressed as the MD direction, and the width direction orthogonal to the transport direction is expressed as the TD direction.
　図１は、本発明を具現化する形態の一例の全体構成を示す概略図である。図１には、本発明に係る間欠塗布装置１の概略図が示されている。 FIG. 1 is a schematic view showing an overall configuration of an example of a form embodying the present invention. FIG. 1 shows a schematic view of the intermittent coating device 1 according to the present invention.
　間欠塗布装置１は、基材Ｓに塗液Lを間欠的に塗布するものである。
具体的には、間欠塗布装置１は、塗布ノズル２、塗液供給部３、開閉バルブ４、液溜まり部５、受圧容積可変部６、制御部ＣＮ等を備えている。 The intermittent coating device 1 intermittently coats the coating liquid L on the base material S.
Specifically, the intermittent coating device 1 includes a coating nozzle 2, a coating liquid supply unit 3, an opening / closing valve 4, a liquid pool portion 5, a pressure receiving volume variable unit 6, a control unit CN, and the like.
　塗布ノズル２は、基材Ｓに向けて塗液Lを吐出させるものである。
具体的には、塗布ノズル２は、塗液Lを供給する供給口２１と、塗液Lを吐出する吐出口２２と、供給口と吐出口を連通させるマニホールド２３を備えている。
より具体的には、塗布ノズル２は、スリットノズルやスリットダイと呼ばれる構造のものが例示でき、供給口２１に塗液Lを圧送して供給すると、細長いスリット状の吐出部２３から塗液Lが押し出されて吐出される。 The coating nozzle 2 discharges the coating liquid L toward the base material S.
Specifically, the coating nozzle 2 includes a supply port 21 for supplying the coating liquid L, a discharge port 22 for discharging the coating liquid L, and a manifold 23 for communicating the supply port and the discharge port.
More specifically, the coating nozzle 2 can be exemplified by a structure called a slit nozzle or a slit die, and when the coating liquid L is pumped and supplied to the supply port 21, the coating liquid L is supplied from the elongated slit-shaped discharge portion 23. Is pushed out and discharged.
　塗液供給部３は、塗布ノズル２に塗液Lを供給するものである。
具体的には、塗液供給部３は、塗液タンク３０、送液ポンプ３１、塗液供給流路３２を備えている。 The coating liquid supply unit 3 supplies the coating liquid L to the coating nozzle 2.
Specifically, the coating liquid supply unit 3 includes a coating liquid tank 30, a liquid feeding pump 31, and a coating liquid supply flow path 32.
　塗液タンク３０は、塗液Ｌを貯める（充填するとも言う）ものである。 The coating liquid tank 30 stores (also called filling) the coating liquid L.
　送液ポンプ３１は、塗液タンク３０に貯められている塗液Ｌを塗布ノズル２に圧送するものである。具体的には、送液ポンプ３１は、ギアポンプ、モーノポンプ、ロータリーベーンポンプ、スクロールポンプなど、モータの回転力により塗液Ｌを圧送するものが例示できる。 The liquid feed pump 31 pumps the coating liquid L stored in the coating liquid tank 30 to the coating nozzle 2. Specifically, the liquid feed pump 31 can be exemplified by pumping the coating liquid L by the rotational force of the motor, such as a gear pump, a mono pump, a rotary vane pump, and a scroll pump.
　塗液供給流路３２は、塗布ノズル２の塗液供給口と送液ポンプ３１の吐出口とを接続し、送液ポンプ３１から塗布ノズル２へ塗液Lを流し供給するものである。
具体的には、塗液供給流路３２は、ステンレスや真鍮などの金属配管のほか、ホースやチューブと呼ばれる樹脂配管で構成されている。また、塗液供給流路３２は、必要に応じて流路（配管経路、経路、ルートとも言う）の途中にＬ型継手やＴ型継手などが配置されている。 The coating liquid supply flow path 32 connects the coating liquid supply port of the coating nozzle 2 and the discharge port of the liquid feeding pump 31, and supplies the coating liquid L from the liquid feeding pump 31 to the coating nozzle 2.
Specifically, the coating liquid supply flow path 32 is composed of metal pipes such as stainless steel and brass, as well as resin pipes called hoses and tubes. Further, in the coating liquid supply flow path 32, an L-shaped joint, a T-shaped joint, or the like is arranged in the middle of the flow path (also referred to as a piping path, a path, or a route) as needed.
　図２は、本発明を具現化する形態の一例の要部を示す斜視図である。図２（ａ）には、開閉バルブ４を閉状態から開状態に移行させ（矢印Ｄ１に示す方向に移動させ）、液溜まり部５の容積が減少した状態の概略図が示されている。一方、図２（ｂ）には、開閉バルブ４を開状態から閉状態に移行させ（矢印Ｄ２に示す方向に移動させ）、液溜まり部５の容積が増加した状態の概略図が示されている。 FIG. 2 is a perspective view showing a main part of an example of a form embodying the present invention. FIG. 2A shows a schematic view of a state in which the on-off valve 4 is shifted from the closed state to the open state (moved in the direction indicated by the arrow D1) and the volume of the liquid pool portion 5 is reduced. On the other hand, FIG. 2B shows a schematic view of a state in which the on-off valve 4 is moved from the open state to the closed state (moved in the direction indicated by the arrow D2) and the volume of the liquid pool portion 5 is increased. There is.
　開閉バルブ４は、塗布ノズル２と塗液供給部３との間の塗液供給流路３２内に配置されて、塗液Lの供給／停止を切り替えるものである。具体的には、開閉バルブ４は、弁体４１、ロッド４２、エアシリンダ４３を備えている。 The on-off valve 4 is arranged in the coating liquid supply flow path 32 between the coating nozzle 2 and the coating liquid supply unit 3 to switch the supply / stop of the coating liquid L. Specifically, the on-off valve 4 includes a valve body 41, a rod 42, and an air cylinder 43.
　弁体４１は、塗液供給流路３２の経路の途中に配置されており、流路を連通させたり塞いだりすることで、塗液Lの供給／停止を切り替えるものである。 The valve body 41 is arranged in the middle of the path of the coating liquid supply flow path 32, and switches the supply / stop of the coating liquid L by communicating or blocking the flow path.
　エアシリンダ４３は、弁体４１が連結されたロッド４２を往復移動させるものであり、駆動用エアの圧力方向を切り替えることで、弁体４１を開状態／閉状態に切り替える。なお、駆動用エアの圧力方向は、制御部ＣＮに接続されたソレノイドバルブ（電磁弁）を用いて、ポート４３ａに圧空を供給しつつポート４３ｂを大気解放させたり、その逆にしたりして、切り替えられる。 The air cylinder 43 reciprocates the rod 42 to which the valve body 41 is connected, and by switching the pressure direction of the driving air, the valve body 41 is switched between the open state and the closed state. As for the pressure direction of the driving air, a solenoid valve (solenoid valve) connected to the control unit CN is used to supply compressed air to the port 43a and release the port 43b to the atmosphere, or vice versa. Can be switched.
　液溜まり部５は、塗液供給部３と開閉バルブ４との間の塗液供給流路３２において、流入する塗液Lを滞留させるものである。具体的には、液溜まり部５は、塗液供給流路３２と連通された筒状の空間を有している。より具体的には、液溜まり部５は、塗液ＬがＬ字状に流れる塗液供給流路３２の角部に配置されており、塗液Ｌの流入方向に対して塗液Lの流出方向と液溜まり部５がＴ字状に分岐されるように構成されている。
さらに、液溜まり部５には、受圧容積可変部６を備えている。 The liquid pool portion 5 retains the inflowing coating liquid L in the coating liquid supply flow path 32 between the coating liquid supply unit 3 and the on-off valve 4. Specifically, the liquid pool portion 5 has a tubular space that is communicated with the coating liquid supply flow path 32. More specifically, the liquid pool portion 5 is arranged at the corner of the coating liquid supply flow path 32 in which the coating liquid L flows in an L shape, and the coating liquid L flows out in the inflow direction of the coating liquid L. The direction and the liquid pool portion 5 are configured to be branched in a T shape.
Further, the liquid pool portion 5 is provided with a pressure receiving volume variable portion 6.
　受圧容積可変部６は、圧力変動調節部とも呼ばれ、開閉バルブ４の切り替え動作で生じた塗液供給流路３２内の圧力変化に受動して、液溜まり部５の容積を変化させることで当該塗液供給流路３２内の圧力変動を調節するものである。
具体的には、受圧容積可変部６は、ピストン機構を有しており、ピストン部６１、付勢力付与部６２を備えている。 The pressure receiving volume variable unit 6 is also called a pressure fluctuation adjusting unit, and is passive to the pressure change in the coating liquid supply flow path 32 generated by the switching operation of the on-off valve 4 to change the volume of the liquid pool portion 5. The pressure fluctuation in the coating liquid supply flow path 32 is adjusted.
Specifically, the pressure receiving volume variable portion 6 has a piston mechanism, and includes a piston portion 61 and an urging force applying portion 62.
　ピストン部６１は、液溜まり部５の容積（つまり、液溜まり量）を増減させるものである。具体的には、ピストン部６１は、液溜まり部５の内壁面と密接しつつ移動（いわゆる、摺動）するものである。より具体的には、ピストン部６１は、円板状または円柱状の部材で構成されており、外周部にリング状のパッキン（シール、Oリングとも言う）が取り付けられており、塗液Ｌの流出方向と同じ方向に移動できる構成をしている。 The piston portion 61 increases or decreases the volume of the liquid pool portion 5 (that is, the amount of the liquid pool). Specifically, the piston portion 61 moves (so-called sliding) while being in close contact with the inner wall surface of the liquid pool portion 5. More specifically, the piston portion 61 is composed of a disk-shaped or columnar member, and a ring-shaped packing (also referred to as a seal or O-ring) is attached to the outer peripheral portion of the coating liquid L. It is configured so that it can move in the same direction as the outflow direction.
　付勢力付与部６２は、ピストン部６１が移動する速度を調整し、ピストン部６１の位置（つまり、液溜まり部５の容積）の変化度合いを調整するものである。具体的には、付勢力付与部６２は、ピストン部６１に対して所定の付勢力を加えるものである。より具体的には、付勢力付与部６２は、エアシリンダで構成されている。 The urging force applying portion 62 adjusts the speed at which the piston portion 61 moves, and adjusts the degree of change in the position of the piston portion 61 (that is, the volume of the liquid pool portion 5). Specifically, the urging force applying unit 62 applies a predetermined urging force to the piston unit 61. More specifically, the urging force applying unit 62 is composed of an air cylinder.
　なお、開閉バルブ４の開閉動作の際、送液ポンプ３１は作動し続けている。そのため、もし本発明を適用せず開閉バルブ４を閉状態から開状態に移行させてしまうと、塗液供給流路３２内の圧力Ｐ１は急下降し、塗工開始端部に凹みが生じ易くなる。一方、もし本発明を適用せず開閉バルブ４を開状態から閉状態に移行させてしまうと、塗液供給流路３２内の圧力Ｐ２は急上昇し、塗工終了端部に盛り上がりが生じ易くなる。 When the opening / closing valve 4 is opened / closed, the liquid feed pump 31 continues to operate. Therefore, if the on-off valve 4 is shifted from the closed state to the open state without applying the present invention, the pressure P1 in the coating liquid supply flow path 32 drops sharply, and a dent is likely to occur at the coating start end. Become. On the other hand, if the opening / closing valve 4 is shifted from the open state to the closed state without applying the present invention, the pressure P2 in the coating liquid supply flow path 32 rises sharply, and the end portion of the coating is likely to rise. ..
　しかし、本発明にかかる受圧容積可変部６は、上述のようなピストン機構を有しているため、開閉バルブ４の切り替え動作に応じて、以下の様な挙動を示す。
（１）切り替え動作で開閉バルブ４を閉状態から開状態に移行させたとき、塗液供給流路３２内の圧力Ｐ１は急下降しようとするが、受動的に液溜まり部５の容積が収縮（つまり、受圧容積可変部６のピストン部６１が矢印ｄ１に示す方向に移動）して塗液の流出を促進し、圧力Ｐ１の下降が緩和される。そのため、、塗布開始端部の凹みが減る。
（２）切り替え動作で開閉バルブ４を開状態から閉状態に移行させたとき、塗液供給流路３２内の圧力Ｐ２は急上昇しようとするが、受動的に液溜まり部５の容積が拡張（つまり、ピストン部６１が矢印ｄ２に示す方向に移動）して塗液の流出を防ぎつつ、圧力Ｐ２の上昇が緩和される。そのため、塗布終了端部の盛り上がりが減る。
（３）本発明にかかる受圧容積可変部６は受動的に動くので、従来技術で起こりやすかった押し出しタイミングのずれにより発生する塗液供給流路３２内の圧力が上昇し過ぎたり、下降しすぎたりすることを防ぐことができる。そのため、塗布開始端部や塗布終了端部の盛り上がりや凹みの発生を防ぐことができる。 However, since the pressure receiving volume variable portion 6 according to the present invention has the piston mechanism as described above, it exhibits the following behavior according to the switching operation of the on-off valve 4.
(1) When the opening / closing valve 4 is changed from the closed state to the open state by the switching operation, the pressure P1 in the coating liquid supply flow path 32 tries to suddenly drop, but the volume of the liquid pool portion 5 passively contracts. (That is, the piston portion 61 of the pressure receiving volume variable portion 6 moves in the direction indicated by the arrow d1) to promote the outflow of the coating liquid, and the decrease in the pressure P1 is alleviated. Therefore, the dent at the coating start end is reduced.
(2) When the opening / closing valve 4 is changed from the open state to the closed state by the switching operation, the pressure P2 in the coating liquid supply flow path 32 tries to rise sharply, but the volume of the liquid pool portion 5 passively expands ( That is, the piston portion 61 moves in the direction indicated by the arrow d2) to prevent the coating liquid from flowing out, and the increase in pressure P2 is alleviated. Therefore, the swelling at the end of coating is reduced.
(3) Since the pressure receiving volume variable portion 6 according to the present invention moves passively, the pressure in the coating liquid supply flow path 32 generated due to the deviation of the extrusion timing, which is likely to occur in the prior art, rises or falls too much. It is possible to prevent it from happening. Therefore, it is possible to prevent the occurrence of swelling and dents at the coating start end and the coating end.
　つまり、受圧容積可変部６は、開閉バルブ４の切り替え動作（つまり、開閉動作）で生じた塗液供給流路３２内の圧力変化に受動して（つまり、圧力変化があればこれに対して受動的に）、液溜まり部５の容積を変化させることで当該塗液供給流路３２内の圧力変動を調節し、塗布開始端部や塗布終了端部で発生しやすい盛り上がりや凹みの発生を防ぐことができる。 That is, the pressure receiving volume variable portion 6 is passive to the pressure change in the coating liquid supply flow path 32 generated by the switching operation (that is, the opening / closing operation) of the opening / closing valve 4 (that is, if there is a pressure change, the pressure change is passive. By changing the volume of the liquid pool 5 (passively), the pressure fluctuation in the coating liquid supply flow path 32 is adjusted, and the swelling and dents that are likely to occur at the coating start end and the coating end end are generated. Can be prevented.
　制御部ＣＮは、例えば以下の様な機能を備えている。
・巻出ロールＲ１、搬送ロールＲ２，Ｒ３、巻取ロールＲ４が取り付けられた回転モータを制御して、基材Ｓを矢印ｖに示す方向に所定速度で搬送させたり、停止させたりする。
・搬送ロールＲ２と塗布ノズル２との間隔（いわゆる、塗布ギャップ）を制御する。
・送液ポンプ３１の作動／停止や、回転数（つまり、送液量）等を制御する。
・所定タイミングで開閉バルブ４の開状態／閉状態を切り替え制御する。
・他の機器（例えば、乾燥装置ＤＲ）の温度や送風量等を制御する。 The control unit CN has, for example, the following functions.
-The rotary motor to which the unwinding roll R1, the transport rolls R2 and R3, and the take-up roll R4 are attached is controlled to transport or stop the base material S at a predetermined speed in the direction indicated by the arrow v.
The distance between the transport roll R2 and the coating nozzle 2 (so-called coating gap) is controlled.
-Controls the operation / stop of the liquid feed pump 31, the rotation speed (that is, the liquid feed amount), and the like.
-The open / closed state of the open / close valve 4 is switched and controlled at a predetermined timing.
-Control the temperature, air volume, etc. of other equipment (for example, drying device DR).
　具体的には、制御部ＣＮは、コンピュータやプログラマブルロジックコントローラ等（つまり、ハードウェア）と、その実行プログラム等（つまり、ソフトウェア）で構成されている。 Specifically, the control unit CN is composed of a computer, a programmable logic controller, etc. (that is, hardware) and its execution program, etc. (that is, software).
　より具体的には、制御部ＣＮは、巻出ロールＲ１等が取り付けられた回転モータや、塗布ギャップを調節する機構、送液ポンプ３１、開閉バルブ４の切り替え駆動用機構等と、信号入出力手段を介して接続されており、実行プログラムに基づいて各部の機器や機構等を制御するように構成されている。 More specifically, the control unit CN includes a rotary motor to which the unwinding roll R1 or the like is attached, a mechanism for adjusting the coating gap, a liquid feed pump 31, a switching drive mechanism for the on-off valve 4, and the like, and signal input / output. It is connected via means and is configured to control the devices and mechanisms of each part based on the execution program.
　上述した受圧容積可変部６のピストン部６１に加える付勢力は、手動レギュレータを用いてピストン部６１に所定の付勢力が加わる構成としても良いし、搬送速度や品種に応じて都度異なる付勢力が加わるように設定し直すような構成としても良い。或いは、手動レギュレータに替えて、制御部ＣＮと接続された電空レギュレータを用いて、搬送速度や品種に応じて予め設定しておいた所定の付勢力が加わるように自動的に切り替えできる構成であっても良い。 The urging force applied to the piston portion 61 of the pressure receiving volume variable portion 6 may be configured such that a predetermined urging force is applied to the piston portion 61 by using a manual regulator, and the urging force varies depending on the transport speed and the type. It may be configured to be reset so that it will be added. Alternatively, instead of the manual regulator, an electropneumatic regulator connected to the control unit CN can be used to automatically switch so that a predetermined urging force set in advance according to the transport speed and product type is applied. There may be.
　この様な構成をしているため、本発明に係る間欠塗布装置１は、基材の搬送速度が速く（つまり、間欠塗布の間隔が短く）なっても、間欠塗布の開始端部や終了端部の盛り上がりおよび凹みを確実に抑制することができる。さらに、本発明に係る間欠塗布装置１は、回収バルブを使用しないので、回収バルブの駆動や衝撃を起因とした厚みムラの発生を防ぐことができる。そのため、間欠塗布の開始端部や終了端部の盛り上がりおよび凹みを抑制しつつ、基材の搬送速度を速くすることができ、生産性の向上を図ることができる。 Due to such a configuration, the intermittent coating device 1 according to the present invention has a start end and an end end of intermittent coating even if the transport speed of the base material is high (that is, the interval of intermittent coating is short). It is possible to reliably suppress the swelling and denting of the portion. Further, since the intermittent coating device 1 according to the present invention does not use the recovery valve, it is possible to prevent the occurrence of thickness unevenness due to the drive or impact of the recovery valve. Therefore, the transfer speed of the base material can be increased while suppressing the swelling and denting of the start end portion and the end end portion of the intermittent coating, and the productivity can be improved.
　［変形例］
　なお上述では、略Ｌ字形の塗液供給流路３２の角部に液溜まり部５および受圧容積可変部６が配置され、塗液Ｌの供給方向に対して塗液Ｔの流出方向と液溜まり部５がＴ字状に分岐されており、受圧容積可変部６のピストン部６１の移動方向ｄ１，ｄ２が、塗液Ｌの流出方向を向いている構成を例示した。この様な構成であれば、圧力変動を調節する際、液溜まり部５に流入したり液溜まり部５から流出する塗液Ｌは、偏りや澱みが無くスムーズに流動するので好ましい。 [Modification example]
In the above description, the liquid pool portion 5 and the pressure receiving volume variable portion 6 are arranged at the corners of the substantially L-shaped coating liquid supply flow path 32, and the outflow direction of the coating liquid T and the liquid pool with respect to the supply direction of the coating liquid L. The configuration in which the portion 5 is branched in a T shape and the moving directions d1 and d2 of the piston portion 61 of the pressure receiving volume variable portion 6 are directed to the outflow direction of the coating liquid L is illustrated. With such a configuration, when adjusting the pressure fluctuation, the coating liquid L that flows into the liquid pool portion 5 or flows out from the liquid pool portion 5 is preferable because it flows smoothly without bias or stagnation.
　しかし、上述の様な構成に限らず、受圧容積可変部６は、図３に示す様な配置で塗液供給流路３２に接続された構成としても良い。 However, the configuration is not limited to the above, and the pressure receiving volume variable portion 6 may be connected to the coating liquid supply flow path 32 in the arrangement shown in FIG.
　図３は、本発明を具現化する形態の変形例の要部を示す概略図である。
図３（ａ）には、受圧容積可変部６として、塗液Ｌが送液される塗液供給流路３２の直線部分に直交するよう液溜まり部５および受圧容積可変部６が接続され、当該直交方向にピストン部６１が移動する構成が例示されている。
図３（ｂ）には、受圧容積可変部６として、塗液Ｌが送液される塗液供給流路３２のＬ字状の角部分に液溜まり部５および受圧容積可変部６が接続され、塗液Ｌが供給されてきた方向と同じ方向にピストン部６１が移動する構成が例示されている。 FIG. 3 is a schematic view showing a main part of a modified example of a form embodying the present invention.
In FIG. 3A, as the pressure receiving volume variable portion 6, the liquid pool portion 5 and the pressure receiving volume variable portion 6 are connected so as to be orthogonal to the linear portion of the coating liquid supply flow path 32 to which the coating liquid L is sent. An example is shown in which the piston portion 61 moves in the orthogonal direction.
In FIG. 3B, as the pressure receiving volume variable portion 6, the liquid pool portion 5 and the pressure receiving volume variable portion 6 are connected to the L-shaped corner portion of the coating liquid supply flow path 32 to which the coating liquid L is sent. , The configuration in which the piston portion 61 moves in the same direction as the direction in which the coating liquid L is supplied is illustrated.
　なお、塗液供給流路３２に対して受圧容積可変部６をどのような配置で接続するかは、塗液供給流路３２の長さや取り回し、液溜まり部５の容積、塗液Ｌの時間当たりの流量、間欠切り替え間隔等に応じて、適宜設定することができる。 The arrangement of the pressure receiving volume variable portion 6 connected to the coating liquid supply flow path 32 depends on the length and handling of the coating liquid supply flow path 32, the volume of the liquid pool portion 5, and the time of the coating liquid L. It can be appropriately set according to the flow rate per hit, the intermittent switching interval, and the like.
　［別の形態］
　上述では、本発明に係る受圧容積可変部６として、塗液供給流路３２内の圧力と付勢力との差で液溜まり部５の容積を変化させるピストン機構を有する形態を例示した。
この様な形態であれば、ピストン機構のピストン部６１にはたらかせる付勢力は、付勢力付与部６２のエアシリンダに印加する流体の圧力を調節することで設定することができ、液溜まり部５の容積が変動しても、この付勢力を一定に保ち続けることができるため好ましい。 [Another form]
In the above description, as the pressure receiving volume variable portion 6 according to the present invention, a mode having a piston mechanism for changing the volume of the liquid pool portion 5 by the difference between the pressure in the coating liquid supply flow path 32 and the urging force is illustrated.
In such a form, the urging force exerted on the piston portion 61 of the piston mechanism can be set by adjusting the pressure of the fluid applied to the air cylinder of the urging force applying portion 62, and the liquid pool portion 5 This is preferable because the urging force can be kept constant even if the volume of the cylinder fluctuates.
 しかし、受圧容積可変部６は、この様な形態に限らず、塗液供給流路内の圧力と付勢力との差で液溜まり部５の容積を変化させるバルーン機構を備えた形態であっても良い。 However, the pressure receiving volume variable portion 6 is not limited to such a form, and is provided with a balloon mechanism that changes the volume of the liquid pool portion 5 by the difference between the pressure in the coating liquid supply flow path and the urging force. Is also good.
　図４は、本発明を具現化する別の形態の一例の要部を示す概略図であり、バルーン機構の一例が示されている。 FIG. 4 is a schematic view showing a main part of an example of another embodiment embodying the present invention, and an example of a balloon mechanism is shown.
　バルーン機構は、変形可能な隔膜６６を備え、液溜まり部５の容積を変化させるものでり、液溜まり部５に塗液Lを取込んだり、塗液供給流路３２へ押し戻したりするものである。 The balloon mechanism is provided with a deformable diaphragm 66 and changes the volume of the liquid pool portion 5, and is for taking the coating liquid L into the liquid collecting portion 5 and pushing it back to the coating liquid supply flow path 32. is there.
　隔膜６６は、液溜まり部５の内壁の一部を構成し、塗液供給流路３２内の圧力と外部圧力Ｐ３との差で変形する構造を有している。具体的には、隔膜６６は、伸縮性を有するゴムやエラストマー等で構成されている。そのため、外部圧力Ｐ３が隔膜６６を押す力および隔膜６６が収縮しようとする力が付勢力として隔膜６６に加わっている。
図４（ａ）には、開閉バルブ４を閉状態から開状態に移行させ（矢印Ｄ１に示す方向に移動させ）、液溜まり部５の容積が減少した状態の概略図が示されている。 The diaphragm 66 forms a part of the inner wall of the liquid pool portion 5, and has a structure that is deformed by the difference between the pressure in the coating liquid supply flow path 32 and the external pressure P3. Specifically, the diaphragm 66 is made of elastic rubber, an elastomer, or the like. Therefore, a force that the external pressure P3 pushes the diaphragm 66 and a force that the diaphragm 66 tries to contract are applied to the diaphragm 66 as an urging force.
FIG. 4A shows a schematic view of a state in which the on-off valve 4 is shifted from the closed state to the open state (moved in the direction indicated by the arrow D1) and the volume of the liquid pool portion 5 is reduced.
　開閉バルブ４を閉状態から開状態に移行させると、塗液供給流路３２内の圧力Ｐ１は急下降しようとするが、隔膜６６に加わっている付勢力との差で受動的に溜まり部５の容積が収縮（つまり、隔膜６６が矢印ｄ１に示す方向に移動）して塗液Ｌの流出を促進しつつ、塗液供給流路３２内の圧力Ｐ１の下降が緩和される。そのため、塗布開始端部の凹みが減る。 When the on-off valve 4 is moved from the closed state to the open state, the pressure P1 in the coating liquid supply flow path 32 tries to suddenly drop, but the accumulating portion 5 passively differs from the urging force applied to the diaphragm 66. The volume of the coating liquid 66 contracts (that is, the diaphragm 66 moves in the direction indicated by the arrow d1) to promote the outflow of the coating liquid L, and the decrease in the pressure P1 in the coating liquid supply flow path 32 is alleviated. Therefore, the dent at the coating start end is reduced.
　一方、図４（ｂ）には、開閉バルブ４を開状態から閉状態に移行させ（矢印Ｄ２に示す方向に移動させ）、液溜まり部５の容積が増加した状態の概略図が示されている。 On the other hand, FIG. 4B shows a schematic view of a state in which the on-off valve 4 is moved from the open state to the closed state (moved in the direction indicated by the arrow D2) and the volume of the liquid pool portion 5 is increased. There is.
　開閉バルブ４を開状態から閉状態に移行させると、塗液供給流路３２内の圧力Ｐ２が急上昇しようとするが、隔膜６６に加わっている付勢力との差で受動的に液溜まり部５の容積が拡張（つまり、ピストン部６１が矢印ｄ２に示す方向に移動）して塗液Ｌの流出を防ぎつつ、塗液供給流路３２内の圧力Ｐ２の上昇が緩和される。そのため、塗布終了端部の盛り上がりが減る。 When the on-off valve 4 is moved from the open state to the closed state, the pressure P2 in the coating liquid supply flow path 32 tries to rise sharply, but the liquid pool portion 5 passively differs from the urging force applied to the diaphragm 66. The volume of the coating liquid L is expanded (that is, the piston portion 61 moves in the direction indicated by the arrow d2) to prevent the coating liquid L from flowing out, and the increase in the pressure P2 in the coating liquid supply flow path 32 is alleviated. Therefore, the swelling at the end of coating is reduced.
　なお、隔膜６６の外部圧力Ｐ３は、大気圧でも良いし、密閉空間を形成する筐体６７内を加圧したり減圧したりしても良い。そして、筐体６７内を加圧すれば、液溜まり部５の拡張をしにくくさせつつ、収縮をしやすくさせることができる。一方、筐体６７内を減圧して液溜まり部５の拡張をしやすくさせつつ、収縮をしにくくさせることができる。
The external pressure P3 of the diaphragm 66 may be atmospheric pressure, or the inside of the housing 67 forming the closed space may be pressurized or depressurized. Then, if the inside of the housing 67 is pressurized, the liquid pool portion 5 can be made difficult to expand and can be easily contracted. On the other hand, the inside of the housing 67 can be depressurized to facilitate the expansion of the liquid pool portion 5 and to make it difficult to shrink.
　　１　　間欠塗布装置
　　２　　塗布ノズル
　　３　　塗液供給部
　　４　　開閉バルブ
　　５　　液溜まり部
　　６　　受圧容積可変部（圧力変動調節部）
　　３０　塗液タンク
　　３１　送液ポンプ
　　３２　塗液供給流路
　　４１　弁体
　　４２　ロッド
　　４３　エアシリンダ
　　４３ａ，４３ｂ　ポート
　　６１　ピストン部（ピストン機構）
　　６２　付勢力付与部
　　６６　隔膜（バルーン機構）
　　６７　筐体
　　ＣＮ　制御部
　　Ｓ　　基材（シート）
　　Ｌ　　塗液
　　Ｒ１　巻出ロール
　　Ｒ２，Ｒ３　搬送ロール
　　Ｒ４　巻取ロール
　　ＤＲ　乾燥装置 1 Intermittent coating device 2 Coating nozzle 3 Coating liquid supply section 4 Open / close valve 5 Liquid pool section 6 Pressure receiving volume variable section (pressure fluctuation adjusting section)
30 Liquid coating tank 31 Liquid supply pump 32 Coating liquid supply flow path 41 Valve body 42 Rod 43 Air cylinder 43a, 43b Port 61 Piston part (piston mechanism)
62 Energizing part 66 Septum (balloon mechanism)
67 Housing CN control unit S base material (sheet)
L coating liquid R1 unwinding roll R2, R3 transport roll R4 take-up roll DR drying device

Claims (3)

  1. 　基材に塗液を間欠的に塗布する間欠塗布装置であって、
    　前記基材に向けて塗液を吐出させる塗布ノズルと、
    　前記塗布ノズルに前記塗液を供給する塗液供給部と、
    　前記塗布ノズルと前記塗液供給部との間の塗液供給流路内に配置されて、前記塗液の供給／停止を切り替える開閉バルブと、
    　前記塗液供給部と前記開閉バルブとの間の前記塗液供給流路において、流入する前記塗液を滞留させる液溜まり部を備え、
    　前記液溜まり部には、前記開閉バルブの切り替え動作で生じた前記塗液供給流路内の圧力変化に受動して、前記液溜まり部の容積を変化させることで当該塗液供給流路内の圧力変動を調節する、受圧容積可変部を備えた
    ことを特徴とする、間欠塗布装置。     It is an intermittent coating device that intermittently applies a coating liquid to a base material.
    A coating nozzle that discharges the coating liquid toward the base material, and
    A coating liquid supply unit that supplies the coating liquid to the coating nozzle,
    An on-off valve arranged in the coating liquid supply flow path between the coating nozzle and the coating liquid supply unit to switch the supply / stop of the coating liquid,
    In the coating liquid supply flow path between the coating liquid supply unit and the opening / closing valve, a liquid pool portion for retaining the inflowing coating liquid is provided.
    The liquid pool portion is passively affected by the pressure change in the coating liquid supply flow path caused by the switching operation of the opening / closing valve, and the volume of the liquid pool portion is changed to change the volume of the liquid coating liquid supply flow path. An intermittent coating device characterized by having a pressure receiving volume variable portion that adjusts pressure fluctuations.
  2. 　前記受圧容積可変部は、前記塗液供給流路内の圧力と付勢力との差で前記液溜まり部の容積を変化させるピストン機構を有する
    ことを特徴とする、請求項１に記載の間欠塗布装置。     The intermittent coating according to claim 1, wherein the pressure receiving volume variable portion has a piston mechanism that changes the volume of the liquid pool portion by the difference between the pressure in the coating liquid supply flow path and the urging force. apparatus.
  3. 　前記受圧容積可変部は、前記塗液供給流路内の圧力と付勢力との差で前記液溜まり部の容積を変化させるバルーン機構を備えた
    ことを特徴とする、請求項１に記載の間欠塗布装置。     The intermittent portion according to claim 1, wherein the pressure receiving volume variable portion includes a balloon mechanism that changes the volume of the liquid pool portion by the difference between the pressure in the coating liquid supply flow path and the urging force. Coating device.
PCT/JP2020/022678 2019-07-16 2020-06-09 Intermittent coating apparatus WO2021010057A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010104883A (en) * 2008-10-29 2010-05-13 Hitachi Maxell Ltd Coating apparatus and method of manufacturing functional support using the same
JP2013071044A (en) * 2011-09-27 2013-04-22 Toppan Printing Co Ltd Coating apparatus and coating method
JP2017223280A (en) * 2016-06-15 2017-12-21 株式会社ヒラノテクシード Intermittent valve, intermittent coating applying device and method for the same
JP2018001082A (en) * 2016-06-30 2018-01-11 東レ株式会社 Coating device and coating method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010104883A (en) * 2008-10-29 2010-05-13 Hitachi Maxell Ltd Coating apparatus and method of manufacturing functional support using the same
JP2013071044A (en) * 2011-09-27 2013-04-22 Toppan Printing Co Ltd Coating apparatus and coating method
JP2017223280A (en) * 2016-06-15 2017-12-21 株式会社ヒラノテクシード Intermittent valve, intermittent coating applying device and method for the same
JP2018001082A (en) * 2016-06-30 2018-01-11 東レ株式会社 Coating device and coating method

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