JP5915171B2 - Web coating equipment - Google Patents

Description

  The present invention relates to a coating apparatus for applying a coating material to a web to be conveyed.

  For example, a system for manufacturing a battery electrode includes a coating apparatus that applies a slurry-like electrode material (coating material) to a web while conveying a metal foil (web). In the coating apparatus, the web is transported while being supported by transport rollers provided in the transport path. As a result, the web is in a state in which an appropriate tensile force is applied in the conveyance direction, and thus the web is smoothly conveyed while suppressing fluttering (see, for example, JP 2011-42459 A (Patent Document 1)).

JP 2011-42459 A

  The surface of the coating material applied to the web by the coating apparatus is often uneven since the coating material is in the form of a slurry. However, since the web is smoothly supported while being supported by the transport roller, the surface of the coating material may be manufactured as an electrode with the surface being uneven. In this case, since the amount of the active material contained in the coating material varies depending on the location of the electrode, the battery performance may be deteriorated when this electrode is used for a battery.

  This invention is made | formed in view of such a situation, and it aims at providing the web coating apparatus which can smooth the surface of the coating material coated on the web.

(Claim 1) The web coating apparatus of the present invention comprises first and second transport rollers in which two rotating shafts are arranged in parallel with each other at a predetermined distance, and at least the first and second transport rollers. A web coating apparatus that applies a coating material to a surface of the web that is transported from the first transport roller toward the second transport roller between the rollers. A discharge port for discharging a work material is provided, and the one surface of the web and the discharge port are arranged between the first and second transfer rollers so as to be separated from each other by a predetermined gap length. A coating material discharge device for discharging the coating material from the discharge port to a position not supported by the support member on one side ; and the coating material discharge device between the first and second transport rollers Conveying upstream of the web Is arranged, includes conveying direction of the components of the transported is said while pressing in a direction inclined at an inclination angle of an acute angle to the transport upstream side of the web to one surface to one surface of normal line of the web of the web web And a vibration device that vibrates as described above .

(Claim 2) The vibration exciter includes a web contact portion whose tip is in contact with the web, the web contact portion extending in a direction inclined at the inclination angle, and in a direction inclined at the inclination angle. it may be vibrated.

(Claim 3) The first conveying roller contacts the one surface of the web to convey the web, and the web coating device is disposed upstream of conveying the web with respect to the first conveying roller. A backup roller that is arranged in parallel at a predetermined distance and capable of transferring the web to and from the first transport roller, and a second discharge port for discharging the coating material are provided , You may make it provide the 2nd coating material discharge apparatus which discharges the said coating material from the said 2nd discharge port with respect to the other surface of the said web conveyed oppositely to the said 2nd discharge port.

  (Claim 4) The web coating apparatus is disposed between the first and second transport rollers and on the downstream side of transport of the web with respect to the coating material discharge apparatus. You may make it provide the drying apparatus which dries simultaneously the said coating material of the both surfaces coated by spraying a hot air with respect to the direction and the other side.

  (Claim 5) The web coating device is disposed between the first and second transport rollers and is disposed on the downstream side of transport of the web with respect to the coating material discharge device, and both surfaces of the web being transported. You may make it provide the web holding | maintenance apparatus which clamps.

  (Claim 6) The web holding device includes a pair of first clamping rollers and a pair of rollers that are rotatable so as to sandwich both ends of the web in the width direction and to pull both ends outward. The second clamping roller may be provided.

  (Claim 7) The coating material discharge device and the second coating material discharge device are configured such that the coating material can be applied to a surface excluding both ends in the width direction of the web. Also good.

  (Claim 8) The vibration device, the coating material discharge device, and the second transport roller are bridged and transported between the vibration device, the coating material discharge device, and the second transport roller. The web may be arranged so as to be planar.

  (Claim 9) The vibrating device, the coating material discharging device, and the second conveying roller are arranged so that both side edges of the web are positioned at the center of the vibration amplitude of the vibrating device. It may be.

  (Claim 10) The web coating apparatus may be configured such that a slurry-like electrode material can be applied to a surface of a metal foil used for a battery electrode.

(Claim 1) The web coating apparatus is arranged on the upstream side of conveyance of the web with respect to the coating material discharge apparatus, and is applied with an elastic wave having a high frequency while pressing one surface of the conveyed web. A vibration device is provided. As a result, the surface of the coating material applied to the web is smoothed by eliminating the irregularities due to vibration. Therefore, it is possible to make the quality of the coating material uniform on the entire one surface of the web. The vibration device includes a component in the web conveyance direction while pressing the one surface of the web in a direction inclined at an acute angle toward the upstream side of the web conveyance with respect to the normal of the one surface of the web. It is arranged to vibrate in. As a result, the vibration of the vibration device includes a component in the web conveyance direction. Therefore, by reducing the difference between the vibration speed and the conveyance speed, the web contact portion of the vibration device and one surface of the web can be reduced. It is possible to reduce the friction by improving the slippage of the material. Therefore, it can be smoothly conveyed without damaging the web. In addition, since the web contact portion of the vibration device is disposed close to the discharge port of the coating material discharge device, and the web can be supported by the web contact portion of the vibration device, the web contact portion and the discharge port Flapping during web conveyance between the two can be suppressed. Therefore, the fluctuation of the gap length between the discharge port of the coating material discharge device and one side of the web can be suppressed, and the thickness of the coating material applied to the web is kept constant over the entire one side of the web. The quality of the coating material can be made uniform.

(Claim 2) Since the web contact portion can be reliably disposed at a position close to the discharge port of the coating material discharge device, flapping during web conveyance can be reliably suppressed.

  (Claim 3) The web coating apparatus is provided with a second coating material discharge device that discharges the coating material from the second discharge port to the other surface of the conveyed web. Thereby, a coating material can be applied to both surfaces of a web during temporary conveyance. Therefore, the coating time can be shortened.

  (Claim 4) The web coating apparatus is provided with a drying apparatus for drying the coating material coated on one side and the other side of the web to be conveyed by hot air. Thereby, the coating material coated on both surfaces of the web can be simultaneously dried. Therefore, the drying time can be shortened and the drying apparatus can be downsized as compared with the case where the coating material is dried one side at a time. Further, the web can be lifted by hot air and conveyed without contact. Therefore, damage to the coating material applied on both surfaces of the web can be prevented.

  (Claim 5) The web coating apparatus is provided with a web holding apparatus for sandwiching both surfaces of the conveyed web. Thereby, flapping at the time of web conveyance can be controlled, and variation in the gap length between the one surface of the web and the discharge port of the coating material discharge device can be further suppressed. Therefore, the thickness of the coating material applied to the web can be made constant, and the quality of the coating material on the entire surface of the web can be made more uniform.

  (Claim 6) The web holding device includes a pair of first sandwiching rollers and a pair of rollers that are rotatable so as to sandwich both sides of the conveyed web in the width direction and pull the both ends outward. A second clamping roller is provided. Thereby, the planar state of the conveyed web can be maintained with high accuracy.

  (Claim 7) The coating material discharge device and the second coating material discharge device are configured such that the coating material can be applied to the surface excluding both ends in the width direction of the web. Thereby, the web holding | maintenance apparatus can clamp the both ends of the width direction of a web. Therefore, it is possible to prevent the coating material from adhering to the web holding device.

  (Claim 8) The vibration device, the coating material discharge device, and the second transport roller are arranged so that the web to be transported is planar. Thereby, the vibration of the vibration exciter can be sufficiently transmitted to the web. Therefore, the surface of the coating material can be easily smoothed.

  (Claim 9) The vibration device, the coating material discharge device, and the second conveying roller are arranged so that both side edges of the web are positioned at the center of the vibration amplitude of the vibration device. Thereby, the variation in the thickness of the coating material can be suppressed by adjusting the allowable range of the gap length between the one surface of the web and the discharge port of the coating material discharge device to the vibration amplitude of the vibration generator. Therefore, it is possible to make the quality of the coating material uniform on the entire one surface of the web.

  (Claim 10) The web coating apparatus is configured such that a slurry-like electrode material can be applied to the surface of a metal foil used for a battery electrode. Thereby, it can prevent that the amount of active materials contained in a coating material changes with the places of an electrode. Therefore, the battery performance when this electrode is used for a battery can be kept good.

It is a figure which shows schematic structure of a web coating apparatus. It is the figure which looked at the web coating apparatus of FIG. 1 from upper direction. It is a figure for demonstrating the positional relationship of the coating material discharge apparatus and vibration apparatus of the web coating apparatus of FIG. It is a figure for demonstrating the relationship between the thickness of the coating material coated with the coating material discharge apparatus of FIG. 3, and the vibration amplitude of a vibration exciting apparatus.

(1. Schematic configuration of web coating device)
A schematic configuration of an embodiment of a web coating apparatus of the present invention will be described with reference to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the web coating apparatus 1 according to the present embodiment includes a coating material discharge apparatus 10 that discharges a coating material S (see FIG. 3) to one surface Wa of the web W, The second coating material discharge device 20 that discharges the coating material S to the other surface Wb of the web W, the vibration device 30 that vibrates the web W, and both surfaces Wa and Wb of the web W were coated. A drying device 40 for simultaneously drying the coating material S, a web holding device 50 for sandwiching the web W, first and second transport rollers 61 and 62 for supporting the transported web W, and a second coating material And a backup roller 63 that supports the web W when the coating material S is discharged by the discharge device 20.

  The web W is set in the unwinding apparatus 70 in the state wound by roll shape. Then, the roll-shaped web W is unwound from the unwinding device 70, and from the backup roller 63 of the web coating device 1 through the first transporting roller 61 and the second transporting roller 62, the winding device 80. Rolled up. The first conveying roller 61, the second conveying roller 62, and the backup roller 63 are rotatably supported by bearings on the apparatus body (not shown) of the web coating apparatus 1 so that the web W that is stretched can be smoothly moved. Can be transported.

  Each of the devices 10, 20, 30, 40, 50, 61, 62, and 63 constituting the web coating device 1 includes a second coating material discharging device 20 and a web coating upstream from the transport upstream side of the web W. The backup roller 63, the first conveyance roller 61, the vibration device 30, the coating material discharge device 10, the web holding device 50, the drying device 40, and the second conveyance roller 62 are arranged in this order.

  The first transport roller 61 and the second transport roller 62 are configured so that the rotation shafts 61 a and 62 a are parallel to each other at a predetermined distance and the plane F passing through the rotation shafts 61 a and 62 a is from the first transport roller 61. 2 It arrange | positions so that it may incline upward toward the roller 62 for conveyance. A web W is stretched between the first conveyance roller 61 and the second conveyance roller 62. Then, the coating material discharge device 10 has a roller-side surface Wa of the web W conveyed from the first conveyance roller 61 toward the second conveyance roller 62 (hereinafter, referred to as “one surface Wa of the web W”). On the other hand, the coating material S is discharged.

  The coating material discharge apparatus 10 includes a die coater 11 that discharges the coating material S, a pump 12 connected to the die coater 11, and the like. The die coater 11 is a known device, and is provided with a slot orifice (die) 11a, a discharge port 11b, and the like. The discharge port 11b is formed with a width smaller than the width of the web W. The die coater 11 is disposed between the first and second transport rollers 61 and 62 so that the discharge port 11b and the one surface Wa of the transported web W are separated by a predetermined gap length g. In this example, the gap length g is set to 50 μm to 100 μm, and the intersection is set to ± 10 μm. The pump 12 is a non-pulsating pump such as a screw pump, and can supply the coating material S at a constant pressure and a constant flow rate. The coating material S is supplied to the slot orifice 11a of the die coater 11 from the coating material storage section (not shown) by the pump 12, is pressurized, and is discharged from the discharge port 11b to one surface Wa of the web W. In the gap length g, the thickness of the coating material S applied to the one surface Wa of the web W is 40 μm ± 2 μm.

  The backup roller 63 is arranged such that the rotation shaft 63 a of the backup roller 63 is parallel to the rotation shaft 61 a of the first conveyance roller 61 at a predetermined distance below the first conveyance roller 61. Then, the second coating material discharge device 20 has a back side surface Wb (hereinafter referred to as “the other side Wb of the web W”) of the one surface Wa of the web W conveyed from the backup roller 63 toward the first conveyance roller 61. ), The coating material S is discharged.

  The second coating material discharge device 20 has the same configuration as the coating material discharge device 10, but differs in that the coating material S is discharged to the other surface Wb of the web W that is conveyed and supported by the backup roller 63. It has become. The backup roller 63 is disposed to face the discharge port 21b of the die coater 21. The backup roller 63 is a roller that winds and supports the web W conveyed from the unwinding device 70, and sends the web W to the first conveying roller 61. The coating material S is supplied to the slot orifice 21a of the die coater 21 from the coating material storage section (not shown) by the pump 22 and pressurized, and is conveyed and supported by the backup roller 63 from the discharge port 21b. Discharged to Wb. By providing the second coating material discharge device 20, the coating material S can be applied to the both surfaces Wa and Wb of the web W during the temporary conveyance, and the coating time can be shortened. .

  The vibration device 30 includes a vibrating body 31, an ultrasonic transducer 32, an ultrasonic oscillator 33, and the like. In addition, the ultrasonic wave in this example means an elastic wave with a high frequency of 10 kHz to 1000 kHz. The vibrating body 31 is formed in a rectangular parallelepiped shape having substantially the same width as the width of the web W. And the one side surface 31a which has the long side of the vibrating body 31 is formed in the semicylindrical shape. In this example, the vibrating body 31 is configured to vibrate with an amplitude of ± 2 μm at 20 kHz. The ultrasonic transducer 32 is a transducer having a piezoelectric element such as PZT, for example, and is connected to a side surface 31 b facing the one side surface 31 a of the vibrating body 31. The ultrasonic oscillator 33 is provided with an oscillation circuit that vibrates the ultrasonic transducer 32.

  The vibration device 30 is disposed on the upstream side of the conveyance of the web W with respect to the coating material discharge device 10, and one side surface 31 a (hereinafter referred to as “web contact portion 31 a”) of the vibrating body 31 is disposed on the web W to be conveyed. Vibrating with ultrasonic waves while pressing one surface Wa. As described in the background art, the surface of the coating material S applied to the web W may be uneven. However, by applying ultrasonic vibration to the web W by the vibration device 30, the coating material S The surface of the coating material S can be smoothed. Further, since the web contact portion 31a of the vibrating body 31 is formed in a semi-cylindrical shape, the one surface Wa of the web W can be prevented from being damaged by vibration. Since the vibrating body 31 may contaminate the coating material S when worn, it is made of aluminum or ceramic coated with diamond-like carbon.

  As shown in FIG. 3, the vibrating device 30 is in a direction inclined at an acute inclination angle θ (45 ° in this example) on the upstream side of the conveyance of the web W with respect to the normal line Lv of the one surface Wa of the web W. The web W is arranged so as to vibrate while pressing one surface Wa. When the web W is viewed from the web contact portion 31a of the vibrating body 31 of the vibration device 30 in the direction of the first conveying roller 61, the web W is inclined to the horizontal direction φ (30 ° in this example). It is bridged between the web contact portion 31a and the first conveying roller 61 so as to be inclined at ˜40 °. With this arrangement, the vibration of the vibration device 30 includes a component in the conveyance direction of the web W. Therefore, by reducing the difference between the vibration speed and the conveyance speed, the vibration of the vibration device 30 can be reduced. The friction between the web contact portion 31a of the vibrating body 31 and the one surface Wa of the web W can be improved and friction can be reduced. Therefore, the web W can be smoothly conveyed without damaging the one surface Wa of the web W.

  In addition, the web contact portion 31 a of the vibrating body 31 of the vibration device 30 can be disposed close to the discharge port 10 b of the coating material discharge device 10, and the web W can be supported by the web contact portion 31 a of the vibration body 31. . For example, the distance d between the web contact portion 31a and the discharge port 10b shown in FIG. 3 can be set to 1 mm to 5 mm. Here, instead of the web contact portion 31 a of the vibrating body 31, the web W can be supported by a roller or a fixed plate member that does not vibrate. However, a large-diameter roller is required to support the wide web W with the roller, and the web contact portion of the roller and the discharge port 10b of the coating material discharge device 10 are separated greatly, and the web W is being conveyed. There is a risk of fluttering. Further, in the fixed plate-like member that does not vibrate, the frictional force between the web contact portion of the fixed plate-like member and the web W to be conveyed increases, and there is a possibility that flapping occurs during conveyance of the web W. On the other hand, the web W is conveyed between the web contact portion 31a and the discharge port 10b by disposing the web contact portion 31a of the vibrating body 31 of the vibrating device 30 close to the discharge port 10b of the coating material discharge device 10. Fluttering inside can be suppressed. Therefore, the fluctuation of the gap length g between the discharge port 10b of the coating material discharge device 10 and the one surface Wa of the web W can be suppressed, and the thickness of the coating material S applied to the web W can be made constant. Thus, the quality of the coating material S on both surfaces Wa and Wb of the web W can be made uniform.

  The drying device 40 includes a hollow box-shaped drying chamber 41, a plurality of hot air generators 42, and the like. Slits 41 a and 41 a through which the web W to be conveyed is passed are provided in the center of the opposite side surfaces of the drying chamber 41. The hot air generator 42 incorporates a fan and a heater (both not shown), and is provided with a nozzle port 42a for ejecting the generated hot air. The plurality of hot air generators 42 spray hot air from above and below the web W to be transported so that the coating material S applied to the one surface Wa and the other surface Wb of the web can be dried simultaneously. Arranged on the top and bottom surfaces of the chamber 41. Thereby, compared with the case where the coating material S is dried one side at a time, while being able to shorten drying time, size reduction of the drying apparatus 40 can be achieved. In addition, since the web W can be lifted by hot air and transported in a non-contact manner, damage to the coating material S coated on both surfaces Wa and Wb of the web W can be prevented.

  The web holding device 50 includes a pair of first sandwiching rollers 51, 51, a pair of second sandwiching rollers 52, 52, and the like. The pair of first clamping rollers 51 and 51 are arranged so that the rotation shafts 51a and 51a are parallel to each other and the peripheral surfaces 51b and 51b are in contact with each other, and are configured to be reversely rotated by a motor (not shown) or the like. Yes. The pair of second clamping rollers 52 and 52 has the same configuration. The web holding device 50 clamps both ends We1 and We2 in the width direction of the web W conveyed between the pair of first clamping rollers 51 and 51 and between the pair of second clamping rollers 52 and 52. And is arranged to be rotatable. Thereby, flapping at the time of web conveyance can be controlled. Therefore, the fluctuation of the gap length g between the one surface Wa of the web and the discharge port 10b of the coating material discharge device 10 can be further suppressed, and the thickness of the coating material S applied to the web W can be made constant. Thus, the quality of the coating material S on the entire surface of the web W can be made more uniform.

  Further, the pair of first sandwiching rollers 51, 51 and the pair of second sandwiching rollers 52, 52 sandwich both sides of both end portions We1, We2 in the width direction of the web W to be conveyed. It is rotatably arranged so as to pull outward. That is, since the pair of first sandwiching rollers 51 and 51 sandwich both surfaces of the right end portion We1 in the width direction when viewed from the upstream side of conveyance of the web W, the rotation shafts 51a and 51a are arranged in the width direction of the web W. Are arranged at a position rotated clockwise by a predetermined acute angle α. Since the pair of second sandwiching rollers 52 and 52 sandwich both surfaces of the left end portion We2 in the width direction when viewed from the upstream side of the conveyance of the web W, the rotation shafts 52a and 52a are disposed in the width direction of the web W. It is arranged at a position rotated counterclockwise by a predetermined acute angle α. Thereby, the planar state of the web W to be conveyed can be accurately maintained.

  In this case, the coating material discharge device 10 and the second coating material discharge device 20 may be configured so that the coating material S can be applied to the surface excluding both end portions We1 and We2 in the width direction of the web W. preferable. Thereby, since the web holding device 50 can pinch both end portions We1 and We2 in the width direction of the web W, it is possible to prevent the coating material S from adhering to the web holding device 50.

  The above-described vibration device 30, the coating material discharge device 10, and the second conveyance roller 62 are arranged such that the web W to be conveyed is planar. Thereby, the vibration of the vibration exciting device 30 can be sufficiently transmitted to the web W, and the surface of the coating material S can be easily smoothed. As shown in FIG. 4, the vibration device 30, the coating material discharge device 10, and the second conveyance roller 62 are arranged so that both side edges Ws of the web W are positioned at the center of the vibration amplitude A of the vibration device 30. Is arranged. Accordingly, the vibration device 30 is adjusted so that the vibration amplitude A of the vibration device 30 is within an allowable range ± m of the gap length g between the one surface Wa of the web W and the discharge port 10b of the coating material discharge device 10. By adjusting, variation in the thickness of the coating material S can be suppressed, and the quality of the coating material S on the entire surface of the web W can be made uniform.

(2. Operation of web coating equipment)
Next, the operation of the web coating apparatus 1 will be described. Here, the web W is set in the unwinding device 70 in a state of being wound in a roll shape, and the leading end of the web W is unwound from the unwinding device 70, and is then discharged from the backup roller 63 of the web coating device 1. It is assumed that the film is wound around the winding device 80 via the first conveying roller 61, the web holding device 50, and the second conveying roller 62.

  When the conveyance of the web W is started, the web coating apparatus 1 operates the pump 12 of the coating material discharge apparatus 10 and the pump 22 of the second coating material discharge apparatus 20 to store the coating material S as the coating material storage. Is discharged from the discharge ports 11b and 21b of the die coaters 11 and 21 to one side Wa and the other side Wb of the web W. At this time, since the coating material S is discharged from the die coaters 11 and 21 at a constant amount and the web W is conveyed at a constant speed, the coating material S adhering to both surfaces Wa and Wb of the web W is pulled on the web W. Applied.

  When the coating of the coating material S is started, the web coating apparatus 1 activates the ultrasonic oscillator 33 of the vibration apparatus 30 to press and vibrate one surface Wa of the web W. Thereby, the coating material S coated on the web W is leveled, and the surface of the coating material S is smoothed. In addition, since the web holding device 50 suppresses flapping during web conveyance, the thickness of the coating material S applied to the web W is made uniform.

  The web coating apparatus 1 operates the hot air generator 42 of the drying apparatus 40 to simultaneously dry the coating material S applied to the one surface Wa and the other surface Wb of the web. Thereby, the coating material S coated on the one side Wa and the other side Wb of the web is dried in a short time compared with the case where each side is dried. The above operation is continuously performed until the web W wound in a roll is completely wound on the winding device 80.

(3. Effects of web coating equipment)
The web coating apparatus 1 is arranged on the upstream side of the transport of the web W with respect to the coating material discharge apparatus 10 and is applied with an elastic wave having a high frequency while pressing one surface Wa of the transported web W. A vibration device 30 is provided. As a result, the surface of the coating material S applied to the one surface Wa of the web W is smoothed by removing the irregularities by vibration. Therefore, the quality of the coating material S on the entire one surface Wa of the web W can be made uniform.

(4. Application examples of web coating equipment)
The web coating apparatus 1 is incorporated in, for example, a system for manufacturing battery electrodes, and applies a slurry-like electrode material as a coating material S to the web W while conveying a metal foil as the web W. Here, for example, as the metal foil of the positive and negative electrodes of the lithium ion secondary battery, aluminum foil, copper foil, or the like is used. And as a positive electrode material of a lithium ion secondary battery, lithium manganate, acetylene black, etc. are used, and a graphite, acetylene black, etc. are used as a negative electrode material. Moreover, ethylene carbonate etc. are used as a solvent of a positive / negative electrode.

(5. Modification of web coating device)
In the above-described embodiment, the case where the present invention is applied to the apparatus for applying the coating material S to the one surface Wa and the other surface Wb of the web W has been described. However, the coating material S is applied only to the one surface Wa of the web W. The present invention can also be applied to an apparatus that coats. The vibration device 30 is configured to vibrate the web W with ultrasonic waves (elastic waves having a high frequency of 10 kHz to 1000 kHz), but may be configured to vibrate the web W with elastic waves having a low frequency. Good.

  Further, the first conveying roller 61, the second conveying roller 62, and the backup roller 63 are arranged on the one surface Wa side of the web W. However, the first conveying roller 61 and the backup roller 63 are arranged on one side of the web W. It is good also as a structure arrange | positioned on the surface Wa side and arrange | positioning the 2nd conveyance roller 62 on the other surface Wb side of the web W. FIG. Alternatively, the first conveyance roller 61 and the second conveyance roller 62 may be arranged on the one surface Wa side of the web W, and the backup roller 63 may be arranged on the other surface Wb side of the web W. Alternatively, the first conveying roller 61 may be disposed on the one surface Wa side of the web W, and the second conveying roller 62 and the backup roller 63 may be disposed on the other surface Wb side of the web W. When the backup roller 63 is disposed on the other surface Wb side of the web W, the second coating material discharge device 20 is disposed in the vicinity of the backup roller 63.

DESCRIPTION OF SYMBOLS 1: Web coating apparatus, 10: Coating material discharge apparatus, 11b: Discharge port 20: 2nd coating material discharge apparatus, 21b: Discharge port 30: Excitation apparatus, 31: Vibrating body, 32: Ultrasonic vibrator 33: Ultrasonic oscillator 40: Drying device 50: Web holding device 61: First transport roller 62: Second transport roller 63: Backup roller W: Web S: Coating material Wa: One of the webs Direction, Wb: the other side of the web We1, We2: both ends of the web, Ws: both side edges of the web.

Claims (10)

The first and second transport rollers include first and second transport rollers in which two rotation shafts are arranged in parallel with each other at a predetermined distance, and a web is bridged between at least the first and second transport rollers. A web coating apparatus that coats a coating material on the surface of the web that is transported from the second transport roller to the second transport roller;
A discharge port for discharging the coating material is provided, and the one surface of the web and the discharge port are arranged between the first and second transfer rollers so as to be separated from each other by a predetermined gap length. A coating material discharge device for discharging the coating material from the discharge port to a position not supported by the support member on one side of the web;
Between the first and second transport rollers and disposed on the upstream side of transport of the web with respect to the coating material discharge device, one surface of the transported web is set to a normal of one surface of the web A vibration device that vibrates so as to include a component in the conveyance direction of the web while pressing in a direction inclined at an acute angle on the upstream side of conveyance of the web ;
A web coating device equipped with In claim 1,
The vibration device includes a web contact portion whose tip contacts the web,
The web coating device extends in a direction inclined at the inclination angle and vibrates in the direction inclined at the inclination angle . In claim 1 or 2,
The first conveying roller contacts the one surface of the web to convey the web,
The web coating apparatus is:
A backup roller that is arranged in parallel with a predetermined distance on the upstream side of conveyance of the web with respect to the first conveyance roller, and capable of transferring the web to and from the first conveyance roller;
A second discharge port for discharging the coating material is provided;
The backup roller includes a second coating material discharge device that is disposed to face the second discharge port and discharges the coating material from the second discharge port to the other surface of the web being conveyed. Web coating equipment. In claim 3,
The web coating apparatus is:
Between the first and second transport rollers and disposed on the downstream side of transport of the web with respect to the coating material discharge device, hot air is sprayed onto one side and the other side of the web to be transported for coating. A web coating apparatus comprising: a drying device that simultaneously dries the coated materials on both sides. In claim 3 or 4,
The web coating apparatus is:
A web coating device comprising: a web holding device disposed between the first and second transport rollers and on the downstream side of transport of the web with respect to the coating material discharge device, and sandwiching both surfaces of the transported web. Engineering equipment. In claim 5,
The web holding device includes a pair of first clamping rollers and a pair of second clamping rollers that can be rotated so as to sandwich both sides of both ends in the width direction of the web to be conveyed and pull the both ends outward. Web coating equipment with rollers. In claim 5 or 6,
The said coating material discharge apparatus and the said 2nd coating material discharge apparatus are web coating apparatuses comprised so that the said coating material can be applied to the surface except the both ends of the width direction of the said web. In any one of Claims 1-7,
The vibration device, the coating material discharge device, and the second transport roller are flat between the vibration device, the coating material discharge device, and the second transport roller. A web coating device arranged in a shape. In claim 8,
The web coating apparatus in which the vibrating device, the coating material discharge device, and the second conveying roller are arranged so that both side edges of the web are positioned at the center of vibration amplitude of the vibrating device. In any one of Claims 1-9,
The said web coating apparatus is a web coating apparatus comprised so that a slurry-like electrode material can be apply | coated to the surface of the metal foil used for the electrode of a battery.

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