JP2005040757A - Paint feeding device and paint feeding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paint feeding device and a paint feeding method wherein the swell of a coating pattern is less liable to be generated by using a cylinder when a substrate is intermittently coated with a paint. <P>SOLUTION: The paint is fed to alternately two cylinders 5, 10 through a three-way valve 3 from a paint tank 2 storing the paint. The paint accumulated in the cylinders 5, 10 is charged to a coating head 18 through their corresponding stop valves 4, 9 to coat the substrate 19 therein. The stop valves 4, 9 are alternately opened or closed and the stop valve of the cylinders receiving the paint from the paint tank 2 is closed. Controlling both the stop valves 4, 9 in the closing state cannot charge the paint to the coating head 18 during this time to form blank parts on the substrate 19. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus and method for supplying paint to a substrate, and more particularly to an apparatus and method for intermittently applying paint to a substrate.

  Non-aqueous electrolyte batteries generally include cylindrical batteries and prismatic batteries, and in order to increase the filling amount of the electrode active material, a spiral structure in which sheet-like electrodes are arranged in a spiral form, or a sheet-like battery A laminated structure in which these electrodes are stacked is employed. In this type of battery, an anode plate in which an anode mixture mainly composed of a lithium / cobalt composite oxide as an anode active material is applied to a surface of an aluminum foil as a conductive support in a predetermined thickness. And a cathode mixture in which a cathode mixture mainly composed of carbon is applied to a surface of a copper foil with a predetermined thickness, and is wound in a stacked manner via a separator made of an insulator. is there.

  Also, an anode lead made of aluminum is joined to the end of the anode plate and connected to one surface of the battery. A cathode lead made of nickel is joined to the end of the cathode plate and connected to the other surface of the battery.

  In the manufacture of the anode plate or cathode plate, first, the electrode mixture is continuously applied to a long strip-like conductive support sheet (base material), and then the sheet is cut into a predetermined length. This is done by aligning. At this time, in order to secure a region for joining the above-described anode lead or cathode lead, it is necessary to alternately form portions where the electrode mixture is not applied and portions where the electrode mixture is applied.

In order to realize such intermittent application, some of conventional application apparatuses perform application to the base material by utilizing the weight of the paint, and Patent Document 1 discloses application for uniform application. An intermittent coating apparatus that controls the liquid level of the paint in the head to be kept constant is disclosed. However, this type of coating apparatus is not suitable for high-speed coating.
JP-A-11-347473

  In view of this, a coating apparatus that realizes high-speed coating by controlling the motor and pump to apply pressure to the paint has been considered. Here, the structure of this conventional coating apparatus will be described with reference to the block diagram of FIG.

  A conventional coating apparatus 100 intermittently applies a paint stored in a paint tank 101 to a base material (sheet) 110 of a conductive support. Hereinafter, the operation of the coating apparatus 100 will be described in order. The electrode mixture (paint) stored in the paint tank 101 is provided to the pump 102 via the pipe 105. The pump 102 is driven by a motor 103 and provides paint to the three-way valve 104 at a predetermined pressure (via the pipe 106).

  In FIG. 6, the three-way valve is arranged to provide the paint from the pipe 106 to the pipe 108 as it is. In this state, paint from the tube 106 is provided to the coating head 109 via the tube 108. The coating head 109 applies a coating material to the substrate 110 that is continuously provided in the direction of the arrow in the drawing by the rotation of the backup roll 111.

  Here, the three-way valve 104 is controlled so as to block between the pipe 106 and the pipe 108 at regular intervals, and application from the coating head 109 is not performed at the time of blocking. In this way, the coating pattern 112 and the blank portion 113 are alternately formed on the substrate. Further, the operation of the motor 103 is also controlled in correspondence with the shut-off period, and the paint is not sent into the pipe 106 during the shut-off period. Some paint is returned to the paint tank 101 via the pipe 107.

  The base material 110 thus coated with the paint is then dried by a drier or the like, cut into a predetermined size, and then compressed by a roll press machine or the like.

  However, the method of the coating apparatus 100 shown in FIG. 6 has a problem that a bulge 114 occurs on the coating pattern 112 when the three-way valve 104 is switched. This is because the pressure of the paint provided from the three-way valve 104 to the coating head 109 cannot be suitably adjusted when application is started after the blank portion 113. In addition, since the pipe 106 receives pressure from the pump 102, the life of the pipe 106 is shortened due to piping stress, and the pump 102 frequently fails.

  Further, in the case of the relatively short blank portion 113, since the paint is pushed out by the motor 103 and the pump 102, the response is poor, and it is often difficult to realize an accurate blank length. In addition, there are problems of pulsation and wear of the gear pump. This becomes a more serious problem when a highly viscous paint is applied.

  Accordingly, an object of the present invention is to provide a paint supply apparatus and a paint supply method that do not cause the paint to rise on the application pattern when applied to a substrate.

  It is a further object of the present invention to provide a paint supply apparatus and a paint supply method that realize application of a suitable paint to a substrate without using a pump.

  The present invention includes at least two variable-capacity paint storage spaces defined by a paint tank for storing paint, a working surface of a cylinder, and paint discharge means disposed in the cylinder and driven by drive means, and paint A first valve that periodically provides the paint provided from the tank to any one of the paint accumulation spaces, an application head that applies the paint to the base material, and a paint accumulation space that is provided for each paint accumulation space. A second valve for controlling the supply of paint from the first to the application head, and when the paint is provided from the first valve to the paint accumulation space, the corresponding second valve is closed and the corresponding The paint discharging means is driven to expand the paint accumulation space, so that the paint is accumulated in the paint accumulation space, and the paint is provided from the first valve to the paint accumulation space. If not, the corresponding second valve is opened and the corresponding paint discharging means is driven to reduce the paint accumulation space, thereby supplying the paint from the paint accumulation space to the application head, and the second valve The coating material supply apparatus is configured such that the coating head is periodically provided with the coating material from the different coating material accumulation spaces by periodically repeating the opening and closing operation over the coating material accumulation space.

  The invention is characterized in that the first valve defines the paint provided from the paint tank storing the paint by the cylinder and the working surface of the paint discharge means arranged in the cylinder and driven by the drive means, An application head for applying paint to a substrate from the paint accumulation space by periodically providing one of two variable-capacity paint accumulation spaces and opening and closing a second valve provided for each paint accumulation space And controlling the supply of paint to the paint storage space, when paint is provided from the first valve to the paint storage space, the corresponding second valve is closed and the corresponding paint discharge means is stored in the paint storage If the paint is accumulated in the paint accumulation space by being driven to expand the space, and no paint is provided from the first valve to the paint accumulation space, it corresponds The second valve is opened and the corresponding paint discharging means is driven to reduce the paint accumulation space, so that the paint is supplied from the paint accumulation space to the application head, and the opening and closing of the second valve is the paint accumulation. It is a paint supply method configured to be controlled so as to be periodically supplied with paint from different paint accumulation spaces by being periodically repeated over a space.

  According to the present invention, by providing the cylinder and the ball screw for discharging the paint accumulated in the cylinder, it is possible to provide the paint with a stable pressure to the coating head. The paint from each cylinder is effectively controlled by a three-way valve and an opening / closing valve. With such a configuration, when the coating material is intermittently applied to the substrate, the rising of the coating material on the application pattern can be reduced. Further, since the pump is not used, piping stress is suppressed, and the problem of pump friction does not occur. In particular, when two or more cylinders are used, it is possible to suitably cope with coating having a relatively short blank portion.

  Initially, the coating material supply apparatus of 1st Embodiment based on this invention is demonstrated with reference to the block diagram of FIG. The paint supply apparatus 1 illustrated in FIG. 1 realizes intermittent application using two cylinders without using a pump as in a conventional apparatus. Below, operation | movement of the coating material supply apparatus 1 is demonstrated in order.

  Here, ball screws 6 and 11, which will be described later, correspond to the paint discharging means, and the servo motors 8 and 13 and the ball screw actuators 7 and 12 correspond to driving means for driving the paint discharging means. The three-way valve 3 corresponds to the first valve, the open / close valves 4 and 9 correspond to the second valve, and the coating head 18 corresponds to the coating head. Furthermore, the spaces surrounded by the working surfaces of the cylinder 5 and the ball screw 6 (perpendicular to the moving direction) and the working surfaces of the cylinder 10 and the ball screw 11 (perpendicular to the moving direction) are variable capacity in which paint is accumulated. It is a space and corresponds to the paint accumulation space. The three-way valve 3 and the open / close valves 4 and 9 are valves capable of controlling operations such as opening and closing by providing predetermined electric signals, for example.

  The paint stored in the paint tank 2 is provided to the three-way valve 3 via the pipe 14. The three-way valve changes its direction at a predetermined timing and is controlled so as to alternately provide the paint to the cylinder 5 and the cylinder 10. When the cylinder 5 is filled with paint from the three-way valve 3, the three-way valve 3 is switched to provide paint to the other cylinder 10. Thereafter, the servo motor 8 drives the ball screw actuator 7 to move the ball screw 6 toward the bottom of the cylinder 5.

  Then, the paint filled in the cylinder 5 is pushed out by the ball screw 6 and supplied to the coating head 18 through the pipe 15 and the pipe 17. In this example, the coating head 18 has substantially the same width as the width of the base material 19 (for example, 300 mm to 600 mm), and applies the coating to the base material 19 at a time.

  At this time, the on-off valve 4 is in an open state, and the paint in the cylinder 5 is provided to the pipe 15. Meanwhile, in the cylinder 10, as will be described later, the ball screw 11 is retracted by the servo motor 13 and the ball screw actuator 12, and the paint is filled from the paint tank 2 through the pipe 14.

  When all of the paint filled in the cylinder 5 is provided to the coating head 18, the paint filled in the cylinder 10 is now passed through the opening / closing valve 9, the pipe 16, and the pipe 17. Provided to. At this time, as in the case of the cylinder 5, the servo motor 13 drives the ball screw actuator 12 to move the ball screw 11 toward the bottom of the cylinder 10.

  When the cylinder 5 or the cylinder 10 receives the supply of paint from the three-way valve 3, the corresponding servo motor 8 and servo motor 13 are rotated in the reverse direction, and the ball screw 6 and the ball screw 11 are moved away from the bottom of each cylinder. This fills each cylinder with paint.

  By such an alternate operation with respect to the two cylinders, the coating head 18 is intermittently provided with a paint, and the coating pattern 21 is formed on the substrate 19 at a predetermined interval. Since the coating is provided by stable extrusion using a ball screw, the bulge 114 shown in FIG. 6 can be suppressed within 115% of the ideal thickness of the coating pattern 21, for example. Then, the paint is dried in a drying process (not shown) and wound up at a speed of 30 m / min, for example.

  Next, with reference to the timing chart of FIG. 2, the operation timing of the valves and motors related to the operation of the two cylinders 5 and 10 shown in FIG. 1 will be described.

  In the timing chart of FIG. 2, the operation timings of the three-way valve 3, the on-off valve 4, the on-off valve 9, the servo motor 8, and the servo motor 13 are shown for three cycles (cycles 1 to 3), respectively.

  Cycle 1 is a cycle in which the first coating pattern 21 is formed on the substrate 19, cycle 2 is a cycle in which the second coating pattern 21 is formed on the substrate 19, and cycle 3 is a substrate. This is a cycle in which a third coating pattern 21 is formed on 19.

  The operation timing of the three-way valve 3 is represented by a pulse A. The three-way valve 3 is arranged to open the cylinder 10 and the pipe 14 in cycle 1 and cycle 3 (corresponding to a in FIG. 2). On the other hand, in the cycle 2, the cylinder 5 and the pipe 14 are arranged to open (corresponding to b in FIG. 2).

  The on-off valve 4 associated with the cylinder 5 is represented by pulse B and the on-off valve 9 associated with the cylinder 10 is represented by pulse C. When the operation timing of the three-way valve 3 and the opening / closing valve 4 is viewed, when the three-way valve is arranged to provide the paint to the cylinder 5 (b in FIG. 2), the opening / closing valve 4 is configured so that the provided paint is the cylinder. 5 to be filled. Conversely, when the three-way valve is arranged to provide paint to the cylinder 10 (a in FIG. 2), the opening / closing valve 9 is closed so that the provided paint is filled in the cylinder 10.

  A mode in which the ball screw 6 moves back and forth by the operation of the servo motor 8 is represented by a pulse D. The servo motor 8 moves the ball screw 6 forward (ie, toward the bottom of the cylinder 5) so as to provide the coating head 18 with the paint in the cylinder 5 when the opening / closing valve 4 of the cylinder 5 is opened. The paint is pushed out toward the opening / closing valve 4. Conversely, at the timing when the on-off valve 4 is closed and the paint is supplied from the three-way valve 3, the ball screw 6 is moved backward (ie, away from the bottom of the cylinder 5) so that the paint is filled. Let

  A mode in which the ball screw 11 moves back and forth by the operation of the servo motor 13 is represented by a pulse E. The servo motor 13 moves the ball screw 11 forward (ie, toward the bottom of the cylinder 10) so as to provide the coating head 18 with the paint in the cylinder 10 at the timing when the opening / closing valve 9 of the cylinder 10 is opened. The paint is pushed out toward the opening / closing valve 9. Conversely, at the timing when the opening / closing valve 9 is closed and the paint is supplied from the three-way valve 3, the ball screw 11 is moved backward (ie, away from the bottom of the cylinder 5) so that the paint is filled. Let

  As apparent from the pulse B and the pulse C in FIG. 2, when both the on-off valve 4 and the on-off valve 9 are closed, no paint is provided to the coating head 18 and a blank portion is formed. .

  In the paint supply apparatus 1 of the present invention, as described above, since the paint is intermittently supplied using the cylinder, a cylinder having a relatively large size can be used. Can be reduced. In addition, because of the configuration using the cylinder, for example, it is possible to deal with a high viscosity paint of 20 Pa · s or more. Furthermore, since no pump is used, all problems that occur with the pump, such as gear pump wear, can be avoided.

  In this embodiment, a servo motor, a ball screw actuator, and a ball screw are used as means for pushing out the paint in the cylinder. The ball screw has a plurality of balls interposed between a screw shaft and a nut member fitted on the screw shaft. However, the coating material supply apparatus of the present invention is not limited to such a configuration, and can be configured to extrude the coating material in the cylinder using other known means.

  Next, a paint supply apparatus 30 according to a second embodiment of the present invention will be described with reference to the block diagram of FIG. The paint supply device 30 in FIG. 3 is different from the paint supply device 1 according to the first embodiment in that a third cylinder is added. In the paint supply apparatus 1 of the first embodiment, the filling of the paint from the paint tank 2 and the provision of the paint to the coating head 18 are periodically performed between the two cylinders. These operations are periodically performed between the three cylinders (cylinder 34, cylinder 39, and cylinder 44).

  Here, the ball screws 35, 40, 45 correspond to the paint discharging means, and the servo motors 37, 42, 47 and the ball screw actuators 36, 41, 46 correspond to the driving means for driving the paint discharging means. The valve 32 corresponds to the first valve, the open / close valves 33, 38, and 43 correspond to the second valve, and the coating head 53 corresponds to the coating head. Furthermore, the spaces surrounded by the working surfaces of the cylinder 34 and the ball screw 35 (perpendicular to the moving direction), the working surfaces of the cylinder 39 and the ball screw 40, and the working surfaces of the cylinder 44 and the ball screw 45 are variable. It is a volume space and corresponds to the paint accumulation space.

  With such a configuration, each open / close valve (33, 38, 43), cylinder (34, 39, 44), ball screw (35, 40, 45), ball screw actuator (36, 41, 46), servo motor (37) , 42, 47) can be expected to increase the operation interval and obtain better durability.

  In this example, three cylinders are used, but it is possible to configure the same application using a larger number of cylinders. In addition, with such a configuration, even when one cylinder (or a component in the vicinity thereof) fails, if the control is performed so that the part is cut off, the fault tolerance can be improved.

  Next, a paint supply apparatus 60 according to a third embodiment of the present invention will be described with reference to the block diagram of FIG. The paint supply device 60 of FIG. 4 has a configuration having one cylinder 65, and the one cylinder 65 is connected to one three-way valve 62 and two on-off valves 63 and 64 at the end portions. Yes.

  Here, the ball screw 66 corresponds to the paint discharging means, and the servo motor 68 and the ball screw actuator 67 correspond to the driving means for driving the paint discharging means. The three-way valve 62 corresponds to the first valve, the open / close valves 63 and 64 correspond to the second valve, and the coating head 72 corresponds to the coating head. The cylinder 65 includes, for example, a cylindrical side surface, a bottom surface, and an upper surface. Surrounded by one of the cylinders 65 (for example, the bottom and side surfaces) and the space surrounded by the working surface of the ball screw 66 (perpendicular to the moving direction), and the other of the cylinders 65 (for example, the top and side surfaces) and the working surface of the ball screw 66 The space to be stored is a space in which the paint is accumulated, and these correspond to the paint accumulation space. The paint accumulation space is a variable capacity space whose capacity is changed by the movement of the cylinder 65. When the capacity of one paint accumulation space is increased by the movement of the cylinder 65, the capacity of the other paint accumulation space is increased. Decreases by the capacity.

  The paint stored in the paint tank 61 is provided to the three-way valve 62 via the pipe 69, and the three-way valve 62 provides the paint to either end of the cylinder 65. The ball screw 66 is moved in the direction of arrow A or arrow B by a ball screw actuator 67 driven by a servo motor 68. The movement direction is generally controlled by switching the rotation direction of the servo motor 68.

  In the state shown in the figure, the ball screw 66 moves in the direction of arrow B, and the coating material in the cylinder 65 on the side (tube 77 side) connected to the opening / closing valve 64 is applied to the coating head via the opening / closing valve 64 and the tube 70. 72 has been provided. At this time, the three-way valve 62 is opened on the cylinder 65 and the side connected to the opening / closing valve 63 (on the side of the pipe 76), so that even if the ball screw 66 moves in the direction of the arrow B, the paint enters the pipe 77. It does not flow toward you.

  Thereafter, the three-way valve 62 is switched to open with the pipe 77, and the cylinder 65 is provided with paint. At the same time, the opening / closing valve 63 is opened and the opening / closing valve 64 is closed. Further, the ball screw 66 is controlled to move in the direction of arrow A, and supplies the coating material currently in the cylinder 65 to the coating head 72 via the opening / closing valve 63 and the pipe 70.

  The operation of the paint supply device 60 will be described with reference to the timing chart of FIG. The cycles 1 to 3 shown in the figure are the same as those in FIG. The operation timing of the three-way valve 62 is shown as a pulse F. The three-way valve 62 alternately repeats the “a” state and the “b” state every cycle. The state of (a) is a state in which the pipe 77 is opened and the paint is supplied to the cylinder 65 through the pipe 77, and the state of b is the pipe 76 in the state of being opened and the paint is supplied to the cylinder 65 through the pipe 76. It is in a state of supply.

  The operation timing of the on-off valve 63 is represented by a pulse G, and the operation timing of the on-off valve 64 is represented by a pulse H. That is, when the three-way valve 62 is open to the pipe 76 (a state shown in the figure), the open / close valve 63 is closed and the open / close valve 64 is open. On the other hand, when the three-way valve 62 is open to the pipe 77 (a state), the open / close valve 63 is open and the open / close valve 64 is closed.

  The moving direction of the ball screw 66 moved in the direction of arrow A or arrow B by the servo motor 68 is represented by a pulse J. That is, when the three-way valve 62 is open with the pipe 77 (a state), it moves in the direction of the arrow A, and when it is open with the pipe 76 (the state of b), it moves in the direction of the arrow B.

  In the paint supply apparatus according to the first embodiment and the second embodiment described above, the ball screw performs only the operation of pushing the paint in the cylinder in one direction. However, in the paint supply apparatus 60 of the third embodiment, The paint is also pushed out when the ball screw returns (moves in the direction of arrow B). With such a configuration, paint is alternately provided to the coating head 72 from two paths, and intermittent application is performed.

  So far, the features of the present invention have been described by exemplifying the coating material supply apparatus according to the first to third embodiments for manufacturing an anode plate or a cathode plate used in a nonaqueous electrolyte battery. It should not be understood that the coating material supply apparatus of the present invention is limited to those relating to the production of the anode plate and the cathode plate. The present invention can be applied to various uses for intermittent application to a predetermined substrate. For example, for certain types of batteries, the electrode active material may be intermittently applied, and then the polymer solution may be further intermittently applied. The coating material supply apparatus according to the present invention can also be used for such application. .

It is a block diagram which shows the structural example of the coating material supply apparatus which concerns on 1st Embodiment of this invention. It is a timing chart showing the operation timing about the component of the coating material supply apparatus shown in FIG. It is a block diagram which shows the structural example of the coating material supply apparatus which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structural example of the coating material supply apparatus which concerns on 3rd Embodiment of this invention. It is a timing chart showing the operation timing about the component of the coating material supply apparatus shown in FIG. It is a block diagram which shows the structure of the conventional coating material supply apparatus.

Explanation of symbols

1, 30, 60 ... Paint supply device, 2, 31, 61 ... Paint tank, 3, 62 ... Three-way valve, 32 ... Valve, 4, 9, 33, 38, 43, 63 , 64 ... Open / close valve, 5, 10, 34, 39, 44, 65 ... Cylinder, 6, 11, 35, 40, 45, 66 ... Ball screw, 7, 12, 36, 41, 46, 67 ... Ball screw actuator, 8, 13, 37, 42, 47, 68 ... Servo motor, 18, 53, 72 ... Coating head, 19, 54, 73 ... Base material

Claims (14)

A paint tank for storing paint,
At least two variable volume paint storage spaces, each defined by a working surface of a cylinder and paint discharge means disposed in said cylinder and driven by drive means;
A first valve for periodically providing the paint provided from the paint tank to any one of the paint accumulation spaces;
An application head for applying paint to a substrate;
A second valve that is provided for each paint accumulation space and controls supply of paint from the paint accumulation space to the application head by opening and closing;
When the paint is provided from the first valve to the paint accumulation space, the corresponding second valve is closed and the corresponding paint discharge means is driven to expand the paint accumulation space. By accumulating paint in the paint accumulation space,
When the paint is not supplied from the first valve to the paint accumulation space, the corresponding second valve is opened and the corresponding paint discharge means is driven to reduce the paint accumulation space. By supplying the paint from the paint accumulation space to the application head,
The opening and closing of the second valve is periodically repeated over the paint accumulation space, so that the coating head is controlled to be periodically provided with paint from different paint accumulation spaces. Characteristic paint supply device. The paint supply apparatus according to claim 1,
In the opening and closing of the second valve performed periodically, the coating head is controlled to perform intermittent coating by providing a period for closing all the second valves. Paint supply device. The paint supply apparatus according to claim 1,
The paint discharging means is constituted by a ball screw,
The paint supply apparatus, wherein the driving means is a ball screw actuator and a servo motor. The paint supply apparatus according to claim 1,
Two cylinders,
Each said cylinder defines one paint accumulation space with a corresponding working surface of said paint discharge means,
The first valve is switched to alternately provide paint to the two paint accumulation spaces, and the second valve provides paint to the application head in the paint accumulation space. A paint supply device characterized by alternately opening and closing. The paint supply apparatus according to claim 1,
Including three or more cylinders,
Each said cylinder defines one paint accumulation space with a corresponding working surface of said paint discharge means,
The first valve is switched to sequentially provide paint to the two paint accumulation spaces, and at least one of the second valves is open at a point in time, and the corresponding paint accumulation A paint supply device, characterized in that a paint in a space is provided to the application head. The paint supply apparatus according to claim 1,
One cylinder,
A first paint accumulation space defined by one end of the cylinder and the working surface of the paint discharging means; and a second paint accumulation space defined by the other end of the cylinder and the working surface of the paint discharging means. Have
The first valve is switched to alternately provide paint to the two paint accumulation spaces, and the second valve provides paint to the application head in the paint accumulation space. A paint supply device characterized by alternately opening and closing. The paint supply apparatus according to claim 1,
The paint is an electrode mixture that is an electrode active material,
The coating material supply apparatus, wherein the base material is a sheet-like conductive support. The first valve causes the paint provided from the paint tank containing the paint to be at least two variable defined by a cylinder and a working surface of the paint discharge means disposed in the cylinder and driven by the drive means. Periodically providing one of the volume paint storage spaces;
Controlling the supply of paint from the paint accumulation space to the application head for applying the paint to the substrate by opening and closing a second valve provided for each paint accumulation space;
When the paint is provided from the first valve to the paint accumulation space, the corresponding second valve is closed and the corresponding paint discharge means is driven to expand the paint accumulation space. By accumulating paint in the paint accumulation space,
When the paint is not supplied from the first valve to the paint accumulation space, the corresponding second valve is opened and the corresponding paint discharge means is driven to reduce the paint accumulation space. By supplying the paint from the paint accumulation space to the application head,
The opening and closing of the second valve is periodically repeated over the paint accumulation space, so that the coating head is controlled to be periodically provided with paint from different paint accumulation spaces. A paint supply method. The paint supply method according to claim 8, wherein
In the opening and closing of the second valve performed periodically, the coating head is controlled to perform intermittent coating by providing a period for closing all the second valves. Paint supply method. The paint supply method according to claim 8, wherein
The paint discharging means is constituted by a ball screw,
The paint supply method, wherein the driving means is a ball screw actuator and a servo motor. The paint supply method according to claim 8, wherein
Two cylinders,
Each said cylinder defines one paint accumulation space with a corresponding working surface of said paint discharge means,
The first valve is switched to alternately provide paint to the two paint accumulation spaces, and the second valve provides paint to the application head in the paint accumulation space. A paint supply method characterized by alternately opening and closing. The paint supply method according to claim 8, wherein
Including three or more cylinders,
Each said cylinder defines one paint accumulation space with a corresponding working surface of said paint discharge means,
The first valve is switched to sequentially provide paint to the two paint accumulation spaces, and at least one of the second valves is open at a point in time, and the corresponding paint accumulation A paint supply method comprising: providing a coating material in the space to the coating head. The paint supply method according to claim 8, wherein
One cylinder,
A first paint accumulation space defined by one of the cylinders and a working surface of the paint discharging means; and a second paint accumulation space defined by the other of the cylinders and a working surface of the paint discharging means. ,
The first valve is switched to alternately provide paint to the two paint accumulation spaces, and the second valve provides paint to the application head in the paint accumulation space. A paint supply method characterized by alternately opening and closing. The paint supply method according to claim 8, wherein
The paint is an electrode mixture that is an electrode active material,
The said base material is a sheet-like electroconductive support body, The coating material supply method characterized by the above-mentioned.

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