JP2016007599A - Double-side coating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-side coating device which can suitably change a coating thickness and coating position over a width direction of a sheet-like base material in coating a material on a second surface side of the double-side coating device, prevents wrinkles and fluttering during conveyance of the sheet-like base material, and can maintain good coating quality.SOLUTION: A double-side coating device which coats both surfaces of a sheet-like base material with a coating material, and includes a conveying part of continuously conveying the sheet-like base material, a first surface side coating nozzle, a second surface side coating nozzle, and a first end part side holding part and a second end part side holding part of holding an uncoated part. The first end part side and second end part side holding parts are arranged on a downstream side of the second surface side coating nozzle, and include a first end part side holding position changing part and a second end part side holding position changing part of changing positions of the first end part side holding part and the second end part side holding part, and a holding position control part of controlling the first end part side holding position changing part and the second end part side holding position changing part separately.

Description

  The present invention relates to a double-side coating apparatus that applies a material to both surfaces of a sheet-like substrate such as a metal foil that is continuously conveyed.

  2. Description of the Related Art Conventionally, an apparatus that continuously conveys a sheet-like base material (hereinafter simply referred to as a sheet-like base material) such as a metal foil and applies a coating material on both sides thereof has been used. And carbon materials) are well known (for example, Patent Documents 1 and 2).

  And when performing such double-sided coating, it is required for quality control to match the positions of the coating end portions on the front surface and the back surface. For this reason, the position of each coating nozzle is adjusted.

  On the other hand, when applying a paste (that is, a coating material) to one side of a strip-shaped core material (that is, a sheet-like base material), the gap between the sheet-like base material and the coating nozzle is adjusted to reduce the coating width and thickness. A technique for adjusting and controlling has been proposed (for example, Patent Document 3).

JP 2007-29789 A JP 2008-284528 A JP 2007-258078 A

  In the case of a double-side coating apparatus, when the first surface side (that is, the surface side to which the coating material is applied first) is applied, the coating material is not applied to the second surface side facing the first surface. It is possible to convey the sheet-like substrate along the surface of the backup roll. Therefore, while transporting the sheet-like base material, the coating material is applied using the coating nozzle arranged opposite to the backup roll, and the gap between the backup roll and the coating nozzle is adjusted, or the liquid feeding amount is adjusted. Thus, it is easy to adjust the thickness of the coating material and the coating width.

  On the other hand, when the second surface side (that is, the surface side on which the coating material is applied later) is applied, the backup roll is in an undried state immediately after the coating material is applied to the opposing first surface side. It is impossible to support across the entire width. Therefore, using the second surface side application nozzle arranged on the lower surface side of the sheet-like substrate while applying tension in the conveying direction and the width direction of the sheet-like substrate, the material is moved from the lower gravity side to the upper gravity side. Applying while extruding. At this time, the sheet-like base material is caused by the force of the sheet-like base material and the applied coating material to hang down under the gravity and the flow of the coating material discharged from the second surface side coating nozzle. The force that pushes up the upper side of gravity works. And by the balance of these forces, a sheet-like base material is conveyed, hold | maintained in the flat state over the width direction in the state spaced apart from the 2nd surface side application nozzle.

  In such a state, even if the position of the second surface side application nozzle is adjusted so that the position of the application end portion on the second surface side coincides with the position of the application end portion on the first surface side, the application width of the application material It was difficult to change the coating thickness. Therefore, the application position on the first surface side is adjusted in order to match the application positions on the first surface side and the second surface side. However, if the application position on the first surface side, the coating width, the coating thickness, and the like are changed, the weight balance in the width direction of the sheet-like base material changes. Therefore, this is not a desirable form, and the position where the material is applied on the second surface side can be adjusted to the position where the application position, coating width, and coating thickness on the first surface side are constant. It was desired.

  However, if you want to change the coating thickness or coating position in the width direction of the sheet-like substrate, simply changing the end position of the second surface side coating nozzle separately in the thickness direction of the sheet-like substrate, However, it is not easy to change the coating thickness over the width direction of the sheet base material because it tends to approach the second surface side coating nozzle by its own weight. Furthermore, if the end position of the second surface side coating nozzle is changed separately in the thickness direction of the sheet-like base material, the tension balance acting on the second surface side coating nozzle and the sheet-like base material is lost, and the sheet Wrinkles and flickering occur during the conveyance of the substrate, and good coating quality cannot be maintained.

  Therefore, the present invention can favorably change the coating thickness and application position across the width direction of the sheet-like substrate when applying the material to the second surface side of the double-side coating apparatus, and the sheet-like substrate is being conveyed. An object of the present invention is to provide a double-sided coating apparatus that can maintain good coating quality without causing wrinkles or flickering.

In order to solve the above problems, one aspect of the present invention is as follows.
A double-side coating apparatus that applies a coating material to both sides of a sheet-like substrate,
A transport unit for continuously transporting the sheet-like substrate;
A first surface-side application nozzle that applies a coating material to the first surface side of the sheet-like substrate that is continuously conveyed;
A second surface side application nozzle for applying a coating material to the second surface side of the sheet-like substrate that is continuously conveyed;
The first end side which is one end in the width direction of the sheet-like base material that is continuously conveyed and the second end side that is the other end of the sheet-like base material, which are not coated with the coating material of the sheet-like base material A first end side gripping part and a second end side gripping part for gripping a work part,
The first end side gripping part and the second end side gripping part are arranged on the downstream side in the sheet-like substrate transport direction of the second surface side application nozzle,
A first end side gripping position changing unit that changes the position of the first end side gripping part in the thickness direction of the sheet-like substrate that is continuously conveyed;
A second end side gripping position changing unit that changes the position of the second end side gripping part in the thickness direction of the sheet-like substrate that is continuously conveyed;
It is a double-sided coating apparatus provided with the holding position control part which controls the said 1st end part side holding position change part and the 2nd end part side holding position change part independently.

  According to this configuration, the coating thickness and the coating position can be changed over the width direction of the sheet-like substrate independently of only the second surface side without being influenced by the coating state on the first surface side of the double-side coating apparatus.

  When applying material to the second side of a double-sided coating device, the coating thickness and application position can be changed well across the width of the sheet-like substrate, causing wrinkles and flickering during the conveyance of the sheet-like substrate And good coating quality can be maintained. That is, it becomes easy to align the application position on the second surface side with the application position on the first surface side while maintaining the application quality.

The top view which shows an example of the form which embodies this invention The side view which shows an example of the form which embodies this invention The system block diagram which shows an example of the form which embodies this invention The system block diagram which shows another example of the form which embodies this invention The system block diagram which shows another example of the form which embodies this invention The system block diagram which shows another example of the form which embodies this invention

DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described with reference to the drawings.
In the following drawings, the three axes of the orthogonal coordinate system are X, Y, and Z, the XY plane is the horizontal plane, and the Z direction is the vertical direction. In particular, in the X direction, the direction of the arrow is expressed as the downstream side in the conveyance direction, and the opposite direction is expressed as the upstream side in the conveyance direction, and the Z direction is expressed as the upward direction of the arrow and the opposite direction as the downward direction. The Y direction is expressed as the width direction.

  FIG. 1 is a plan view showing an example of a form embodying the present invention. FIG. 2 is a side view showing an example of a form embodying the present invention, and corresponds to FIG. On the other hand, FIG. 3 is a system configuration diagram showing an example of a form embodying the present invention, and shows a system configuration of the double-side coating apparatus 1.

  Here, a battery electrode core material (for example, a foil material such as aluminum, copper, and stainless steel) is illustrated as a type of the sheet-like base material 10, and the coating material applied to the sheet-like base material 10 is an active material. A slurry material in which a substance, carbon, etc. are kneaded and blended will be described as an example.

  In addition, the 1st surface side of a sheet-like base material described below refers to the surface side on which the coating material is applied first, and the second surface side of the sheet-like base material is applied with the coating material first. The surface side opposite to the first surface side is the surface side on which the coating material is applied later. Moreover, one of the width direction edge parts of a sheet-like base material is called the 1st edge part side, and the other side on the other side is called the 2nd edge part side.

  The double-side coating apparatus 1 applies a coating material on both surfaces of a sheet-like substrate 10 that is continuously conveyed, and includes a sheet-like substrate conveyance unit 2, an application unit 3, a first end side gripping unit 4L, and a second. The configuration includes an end side gripping portion 4R, a first end side gripping position changing portion 5L, a second end portion side gripping position changing portion 5R, and a gripping position control portion 6A. Furthermore, the double-side coating apparatus 1 includes a drying unit DR and a press unit PD as necessary.

  The sheet-like substrate conveyance unit 2 conveys the sheet-like substrate 10 continuously. Specifically, the sheet-like substrate conveyance unit 2 includes a sheet-like substrate unwinding unit 28 and a sheet-like substrate winding unit 29. The sheet-like substrate unwinding section 28 unwinds the sheet-like substrate 10 while rotating the roll around which the sheet-like substrate 10 is wound. The sheet-like base material winding unit 29 winds the sheet-like base material 10 ′, which has been coated and dried (or subsequently pressed), on the roll while rotating the roll. Furthermore, the sheet-like base material transport unit 2 includes transport support rollers 21 and 22 as necessary.

  Since the sheet-like base material transport unit 2 has such a configuration, the sheet-like base material 10 or the sheet-like base material 10c after application on both sides can be continuously transported in the direction of the arrow v.

  The application unit 3 applies an application material to the first surface side and the second surface side of the sheet-like substrate that is continuously conveyed.

  Specifically, the application unit 3 includes a first surface side application nozzle 31n and a second surface side application nozzle 32n. Further, the first surface side application nozzle 31n includes a coating liquid discharge section having an opening of a predetermined length in the width direction of the sheet-like substrate 10, and a coating liquid supply section communicating with the coating liquid discharge section. Yes. A first surface side liquid feed pump 31p is connected to the coating liquid supply unit. Therefore, by supplying the coating material from the first surface side liquid feed pump 31p to the coating liquid supply unit, the coating material is discharged from the coating liquid discharge unit of the first surface side coating nozzle 31n. Similarly, the second surface side coating nozzle 32 includes a coating liquid discharge section having an opening having a predetermined length in the width direction of the sheet-like substrate 10 and a coating liquid supply section communicating with the coating liquid discharge section. ing. A second surface side liquid feed pump 32p is connected to the coating liquid supply unit. Therefore, the coating material is discharged from the coating liquid discharge portion of the second surface side coating nozzle 32n by supplying the coating material from the second surface side liquid feed pump 32p to the coating liquid supply portion.

  The first surface side application nozzle 31n applies the application material to the sheet-like substrate 10 first (that is, on the first surface side). Specifically, the first surface side application nozzle 31n is disposed to face the support roller 33 that conveys the sheet-like base material 10 along the outer peripheral surface with a predetermined interval. The coating liquid discharge part of the first surface side application nozzle 31n is disposed at a position facing the outer peripheral surface of the support roller 33 in a section where the sheet-like base material 10 is along the outer peripheral surface of the support roller 33. ing. More specifically, the first surface side application nozzles 31n are arranged in the horizontal direction as shown in FIGS. 1 and 2 and are spaced apart from the surface of the sheet-like substrate 10 in the width direction (so-called “so-called”). In the state where the nozzle gap is maintained, the coating material is ejected from the coating liquid ejection section from the right direction to the left direction on the paper surface, and the coating material is applied to the first surface side of the sheet-like substrate 10. Yes.

  Since the first surface side application nozzle 31n applies the application material to the sheet-like substrate 10 first, the first surface side application nozzle 31n is limited to the arrangement in which the coating liquid discharge part is oriented in the horizontal direction as described above. Instead, the coating material may be discharged downward from the top or upward from the bottom. Therefore, a section in which the sheet-like base material 10 is along the outer peripheral surface of the support roller 33 may be appropriately set according to the direction in which the coating material is applied, and the coating liquid of the first surface side application nozzle 31n is within that section. What is necessary is just to set suitably arrangement | positioning with the 1st surface side application | coating nozzle and the support roller 33 so that a discharge part may be opposingly arranged with the outer peripheral surface of the support roller 33. FIG.

  On the other hand, the second surface side application nozzle 32n is arranged on the first surface side opposite to the surface side (that is, the first surface side) on which the coating material is applied to the sheet-like substrate 10 (that is, the second surface side). In the stage where the coating material applied to the substrate is not dried, the coating material is applied later. Specifically, as shown in FIGS. 1 and 2, the second surface side coating nozzle 32 n is arranged to discharge the coating material from below to above, and the lower surface of the sheet-like substrate 10 is the second surface. Since it is conveyed while covering the surface side application nozzle 32n, the coating material is applied to the second surface side of the sheet-like substrate 10 (substantially below the conveyance path in the figure).

  Because of such a configuration, when the sheet-like base material 10 is conveyed while passing between the first surface side application nozzle 31n and the support roller 33 in the application unit 3, the sheet-like base material is first provided. The coating material is applied to the first surface side of the material 10 (in the figure, generally above the conveyance path). Thereafter, the coating material is applied to the second surface side of the sheet-like substrate 10 (substantially below the conveyance path in the figure) by the second surface side application nozzle 32n.

  And the 1st end part side holding part 4L and the 2nd end part side holding part 4R are arrange | positioned in the sheet | seat-like base material 10 conveyance direction downstream seeing from the 2nd surface side application nozzle 32n.

  4 L of 1st edge part side holding parts are the 1st edge part side which is one of the width direction edge parts of the sheet-like base material 10 conveyed continuously, and the coating material of the sheet-like base material is not apply | coated The part 10nL is gripped. Specifically, the first end side gripping portion 4L is formed by replacing the material non-coated portion 10nL on the first end side, which is one of the widthwise ends of the sheet-like base material 10c after double-sided coating, with the sheet base material. The thing grasped with a pair of rotating roller 41L from the 10th 1st surface side and the 2nd surface side can be illustrated. The pair of rotating rollers 41L can be configured by either a free roller or a rotating drive roller connected to a rotating motor. Further, the pair of rotating rollers 41L are arranged such that the rotation direction coincides with the traveling direction of the sheet-like base material 10c after double-sided application that is continuously conveyed, or the downstream side thereof is the sheet-like base material 10 after double-sided application. The arrangement is directed toward the outside in the width direction.

  Further, the first end side holding portion 4L may be in a state in which an angle θL formed by the rotation direction of the pair of rotating rollers 41L with respect to the traveling direction of the sheet-like base material 10c after the double-side coating is fixed. However, the configuration may be changed. In order to change the angle θL, the first end side gripping portion 4L is arranged via a rotation mechanism (for example, a rotary actuator) that rotates and stops according to a command from an external control device. The configuration can be exemplified.

  The second end side gripping portion 4R is on the second end side which is the other end in the width direction of the sheet-like substrate 10 that is continuously conveyed, and is not coated with the coating material for the sheet-like substrate. The portion 10nR is gripped. Specifically, the second end side gripping part 4R is formed by replacing the material non-coating part 10nR on the first end side, which is the other end in the width direction of the sheet-like base material 10c after double-sided application, with the sheet base material. The thing grasped with a pair of rotating roller 41R from 10 1st surface side and 2nd surface side can be illustrated. The pair of rotating rollers 41R can be configured as either a free roller or a rotating drive roller connected to a rotating motor. Further, the pair of rotating rollers 41R are arranged so that the rotation direction coincides with the traveling direction of the sheet-like base material 10c after the double-side application that is continuously conveyed, or the downstream side thereof is the sheet-like base material 10 after the double-side application. It is arranged to the outside in the width direction.

  Further, the second end side gripping portion 4R may be in a state in which an angle θR formed by the rotation direction of the pair of rotating rollers 41R with respect to the traveling direction of the sheet-like base material 10c after the double-side coating is fixed. However, the configuration may be changed. In order to change the angle θR, the second end side gripping portion 4R is arranged via a rotation mechanism (for example, a rotary actuator) that rotates and stops according to a command from an external control device. The configuration can be exemplified.

  The pair of rotating rollers 41L and 41R preferably have a predetermined urging force applied in the thickness direction of the sheet-like substrate 10 so as not to idle.

  The first end side gripping portion 4L and the second end side gripping portion 4R are paired at least in pairs at positions that are left-right symmetric when viewed in the width direction of the sheet-like substrate 10c after double-sided application that is continuously conveyed. ing. Note that the first end side gripping portion 4L and the second end side gripping portion 4R are, as necessary, the transport direction (that is, the X direction) or the width of the sheet-like substrate 10c after double-side coating that is continuously transported. When the thickness or width dimension of the sheet-like base material to be transported is changed by adjusting the position in the direction (that is, the Y direction), the thickness of the coating material to be applied or the end position in the width direction Even if it changes, set it to a position where it can be gripped and conveyed with an optimal balance as appropriate according to each state, so that wrinkles and slack do not occur on the sheet-like substrate during continuous conveyance. Is preferred. In addition, the first end side gripping portion 4L and the second end side gripping portion 4R are not limited to one set in order to disperse the force applied to the sheet-like base material 10, but also the sheet-like base material 10c after double-side coating. A configuration may be adopted in which a plurality of sets are arranged in the transport direction.

  The first end side gripping position changing unit 5L determines the position of the first end side gripping part 4L in the thickness direction of the sheet-like substrate 10 that is continuously conveyed (that is, the Z direction; the direction of the arrow 5Lv in FIG. 2). The position is changed.

  The second end side gripping position changing unit 5R determines the position of the second end side gripping part 4R in the thickness direction of the sheet-like substrate 10 that is continuously conveyed (that is, the Z direction; the direction of the arrow 5Lv in FIG. 2). Similarly, the position is changed.

  Specifically, the first end side gripping position changing unit 5L and the second end side gripping position changing unit 5R change the position in the thickness direction (that is, the Z direction) of the sheet-like substrate 10 that is continuously conveyed. Further, it can be configured using a means for stopping (for example, an air cylinder, an electric actuator, a cotter mechanism, a cam mechanism, etc.). More specifically, the first end side gripping position changing unit 5L and the second end side gripping position changing unit 5R are configured to receive a control signal from the outside, change the position in the Z direction, and stop. doing.

  When the first end side gripping position changing unit 5L and / or the second end side gripping position changing unit 5R changes the position in the Z direction, a gap between the sheet-like substrate 10 and the second surface side application nozzle 32n is formed. If it becomes wider, the application position of the application material shifts inward in the width direction, and the entire application width becomes shorter. This is because of the influence of the viscosity of the coating material. And the coating thickness of a coating material increases. This is because, in addition to the reduction in the coating width, the pressure loss caused by the narrow gap between the sheet-like base material 10 and the second surface side coating nozzle 32n is reduced, and the discharge flow rate of the coating material Because it increases.

  The gripping position control unit 6A controls the first end side gripping position changing unit 5L and the second end side gripping position changing unit 5R independently.

  Specifically, the gripping position control unit 6A uses the number of pulse trains, voltage / current values, and the like corresponding to the movement amounts of the first end side gripping unit 4L and the second end side gripping unit 4R as the control signals. This is transmitted to the end side gripping position changing unit 5L and the second end side gripping position changing unit 5R.

  More specifically, the gripping position control unit 6A constitutes a part of the control unit 6 that controls the double-sided coating apparatus 1 in an integrated manner, and the control unit 6 and the gripping position control unit 6A include a control controller ( That is, it includes hardware) and its execution program (that is, software). The control controller includes a programmable logic controller (PLC), a computer, a unit that inputs and outputs data and control signals with an external device, and the like.

  The drying unit DR dries the coating material applied on both surfaces of the sheet-like substrate 10 that is continuously conveyed. The drying unit DR includes, for example, a heater unit DR1, a blower fan DR2, and a cold air nozzle DR3 disposed on the first surface side and the second surface side of the sheet-like base material 10c. Therefore, the sheet-like base material 10c coated with the coating material passes through the drying unit DR, whereby the binder component contained in the coating material is volatilized and the liquid slurry material is solidified (that is, in a dry state). Becomes).

  The press part PD is for compacting the coated and dried coating material. For example, the press part PD includes an upper surface side press roller PD1 and a lower surface side press roller PD2. The upper surface side press roller PD1 and the lower surface side press roller PD2 are arranged to face each other at a predetermined interval, and when the sheet-like substrate after drying passes through this space, the coating material becomes the thickness of the sheet-like substrate. Pressed in the direction and consolidated.

  Since the double-side coating apparatus 1 has such a configuration, when the coating material is applied to both surfaces of the sheet-like substrate 10 that is continuously conveyed, the sheet-like substrate is located in the immediate vicinity of the second surface-side coating nozzle 32n. The material 10 can be supported. And even when the thickness of the sheet-like base material 10 is thinner than before or wider than the conventional width, the occurrence of the undulation phenomenon of the sheet-like base material 10 can be prevented and application failure can be prevented. As a result, the coating material can be applied with a uniform thickness even when the thickness of the sheet-like base material 10 is thinner than the conventional thickness or wider than the conventional width.

  In addition, although the structure provided with drying part DR and press part PD was illustrated as a specific structure of the above-mentioned double-side coating apparatus 1, it is not an essential structure in embodying this invention. Therefore, the present invention can be applied even to a double-side coating apparatus having a configuration that does not include the drying unit DR and the press unit PD.

[Another form]
In the above description, the first end side gripping portion 4L and the second end side gripping are controlled by controlling the first end side gripping position changing portion 5L and the second end side gripping position changing portion 5R by the gripping position control unit 6A. The double-sided coating apparatus 1 in the form of adjusting the position of the portion 4R in the Z direction has been described.

  However, when embodying the present invention, it can be said that it is more preferable to use the double-side coating apparatus 1B having the following configuration, not limited to the double-side coating apparatus 1 having the above-described configuration.

  FIG. 4 is a system configuration diagram showing another example of a form embodying the present invention, and shows a system configuration of the double-side coating apparatus 1B.

  The double-side coating apparatus 1 </ b> B has a configuration including a first-surface-side coating end position measuring unit 71 and a second-surface-side coating end position measuring unit 72 in addition to the configuration of the above-described double-side coating apparatus 1. . The double-side coating apparatus 1B includes a gripping position control unit 6B instead of the gripping position control unit 6A of the double-side coating apparatus 1 described above.

  The 1st surface side application | coating edge part position measurement part 71 measures the application | coating edge part position of the coating material apply | coated to the 1st surface side of the sheet-like base material 10. FIG.

  The 2nd surface side application | coating edge part position measurement part 72 measures the application | coating edge part position of the coating material apply | coated to the 2nd surface side of the sheet-like base material 10. FIG.

The application end position of the application material referred to here is the end position in the width direction of the sheet-like substrate 10.
Specifically, the first surface side coating end position measuring unit 71 and the second surface side coating end position measuring unit 72 utilize the fact that the light reflectance of the sheet-like base material 10 and the coating material is different. The end position of the coating material is detected by irradiating sensing or observing light toward the end of the coating material and detecting the boundary position of the intensity of the reflected light. Alternatively, the first surface side coating end position measuring unit 71 and the second surface side coating end position measuring unit 72 may be configured such that a step is generated in the portion when the coating material is applied onto the sheet-like substrate 10. It may be used to detect the step position. More specifically, the first-surface-side application end position measuring unit 71 and the second-surface-side application end position measuring unit 72 include an imaging camera and an image processing apparatus that include a line sensor or area sensor such as a CCD or CMOS. A combination of the above and a laser displacement meter can be exemplified.

  Or the 1st surface side application | coating edge part position measurement part 71 and the 2nd surface side application | coating edge part position measurement part 72 use X-ray | X_line etc., the part by which the coating material is apply | coated to the sheet-like base material 10, and application | coating The end position of the coating material may be detected by utilizing the difference in transmittance of the part that is not applied.

  For example, the first surface-side application end position measuring unit 71 and the second surface-side application end position measuring unit 72 are arranged downstream of the drying unit DR in the conveyance direction of the sheet-like substrate 10c, for example. it can. For example, the positions are indicated by broken lines 71 and 72 in FIG. The first surface side coating end position measuring unit 71 and the second surface side coating end position measuring unit 72 are arranged at this position in the case of detecting the end position of the coating material by a line sensor or camera. Since the surface of the coating material is dry, the surface reflection intensity of light from the coating material is lowered. That is, it is easy to obtain contrast between a portion where the coating material is applied and a portion where the coating material is not applied (that is, a portion where the sheet-like base material 10 is exposed).

  However, even before the coating material dries, by optimizing the wavelength of the light used for observation and the angle of the irradiated / reflected light, the part where the coating material is applied and the part where the coating material is not applied And contrast. Alternatively, the position of the coating end can be detected with sufficient accuracy by appropriately selecting the position measurement method. Therefore, the first surface side coating end position measuring unit 71 and the second surface side coating end position measuring unit 72 are not limited to being arranged at the positions as described above, but rather than the drying unit DR. The structure arrange | positioned in the upstream of the conveyance direction of the material 10c may be sufficient.

  The grip position control unit 6 </ b> B is configured such that the application end portion of the coating material applied to the second surface side of the sheet-like substrate 10 is applied to the first surface side of the sheet-like substrate 10. The first end side gripping position changing unit 5L and the second end side gripping position changing unit 5R are controlled so as to approach the position.

  Since the double-side coating apparatus 1B has such a configuration, it is possible to control the application position on the second surface side to be matched with the application position on the first surface side applied previously.

[Another form]
In the above description, the first end side gripping portion 4L and the second end side gripping are controlled by controlling the first end side gripping position changing portion 5L and the second end side gripping position changing portion 5R by the gripping position control unit 6A. The double-sided coating apparatus 1 in the form of adjusting the position of the portion 4R in the Z direction has been described.

  However, when embodying the present invention, it may be in the form of a double-side coating apparatus 1C to which the following configuration is further added.

  FIG. 5 is a system configuration diagram showing still another example of a form embodying the present invention, and shows a system configuration of the double-side coating apparatus 1C.

  That is, the double-side coating apparatus 1 </ b> C has a configuration including a second-surface-side coating end position measurement unit 72 and a second-surface-side coating end reference position registration unit 75 in addition to the configuration of the double-side coating apparatus 1 described above. doing. In addition, the double-side coating apparatus 1C includes a gripping position control unit 6C instead of the gripping position control unit 6A of the double-side coating apparatus 1 described above.

  The 2nd surface side application | coating edge part position measurement part 72 measures the application | coating edge part position of the coating material apply | coated to the 2nd surface side of the sheet-like base material 10. FIG. Since the specific configuration is the same as described above, detailed description thereof is omitted.

  The second surface side application end reference position registration unit 75 registers the reference position of the application end portion of the coating material applied to the second surface side of the sheet-like substrate 10 as the second surface side application reference position. is there.

  Specifically, the second surface side coating edge reference position registration unit 75 can be configured using an external recording medium such as a hard disk or an SSD. Or you may comprise the 2nd surface side application | coating edge part reference position registration part 75 using the internal memory of the control part 6 (not shown).

  The gripping position control unit 6C is configured such that the application end position of the coating material applied to the second surface side of the sheet-like substrate 10 measured by the second surface side application end position measurement unit 72 is the second surface side. The first end side gripping position changing unit 5L and the second end side gripping position changing unit 5R are controlled so as to approach the second surface side coating reference position registered in the coating end reference position registration unit 75. is there.

  Since the double-side coating apparatus 1C has such a configuration, it is possible to control the application position on the second surface side to match a preset position registered in advance.

[Another form]
In realizing the present invention, the present invention is not limited to the double-side coating apparatus 1, 1B, 1C having the above-described configuration, and may have the following form. That is, the double-side coating apparatus 1D has a configuration including the second-side coating nozzle moving unit 8 in addition to the configuration of the above-described double-side coating apparatuses 1, 1B, 1C. The double-side coating apparatus 1D includes a gripping position control unit 6D instead of the gripping position control units 6A, 6B, and 6C of the above-described double-side coating apparatuses 1, 1B, and 1C.

  FIG. 6 is a system configuration diagram showing still another example of a form embodying the present invention, and shows a system configuration of a double-side coating apparatus 1D.

  The second surface side application nozzle moving unit 8 moves the second surface side application nozzle 32 n in the width direction of the sheet-like substrate 10. Specifically, the second surface side application nozzle moving unit 8 moves at a predetermined speed in the rail 81 extending in the width direction (that is, the Y direction) of the sheet-like base material 10 and the rail shape at a predetermined speed. And a Y-axis slider 82 that can be stationary. The second surface side application nozzle moving unit 8 is configured to drive the Y-axis slider 82 based on a control signal from the outside, a drive mechanism combining a ball screw and a rotary motor, a drive mechanism using a linear motor, an air cylinder, a hydraulic cylinder, etc. It is configured to move and stand still. The second surface side application nozzle 32 n is attached via a Y-axis slider 82. Therefore, the second surface side application nozzle moving unit 8 can move the second surface side application nozzle 32n to a predetermined position in the width direction of the sheet-like substrate 10 based on a control signal from the outside.

  The gripping position control unit 6 </ b> D is configured such that the application end portion of the coating material applied to the second surface side of the sheet-like base material 10 is applied to the first surface side of the sheet-like base material 10. The first end side holding position changing unit 5L, the second end side holding position changing unit 5R, and the second surface side application nozzle moving unit 8 are controlled so as to approach the position.

  Since the double-side coating apparatus 1D has such a configuration, the application position on the second surface side is adjusted to the application position on the first surface side applied previously, or a reference position that is set and registered in advance. Can be controlled to match.

[Another form]
In the above description, the coating material is applied to both surfaces of the sheet-like base material 10 in a single line. However, when the present invention is embodied, a form in which a plurality of stripes of the coating material are applied on both surfaces of the sheet-like substrate 10 may be employed.

  And in the case of such a form, it is set as the structure further equipped with the stripe non-coating part support part 91 and the support position change part 92, and it replaces with the above-mentioned holding position control part 6A, 6B, 6C, 6D, The position control unit 6E is provided.

  The stripe non-coating portion support portion 91 supports the non-coating portion between a plurality of stripes applied from below to above. Specifically, the stripe non-coating portion support portion 91 is configured to include a rotating roller disposed on the lower surface side of the sheet-like substrate and a block member having a smooth upper surface, and sandwiched between the stripe-coated coating materials. The non-coated part (that is, the non-coated part that is not the both ends in the width direction of the sheet-like base material) is supported from the lower surface side of the sheet-like base material.

  One stripe non-coating portion supporting portion 91 may be arranged in the non-coating portion sandwiched between the stripe-coated coating materials, or two in the width direction.

  The support position changing part 92 changes the position of the stripe non-coated part support part 91 in the thickness direction of the sheet-like substrate 10 that is continuously conveyed. Specifically, the support position changing unit 92 can be exemplified by a configuration similar to that of the first end side gripping position changing unit 5L and the second end side gripping position changing unit 5R described above. And if the stripe non-coating part support part 91 is the structure arrange | positioned by two in the non-coating part pinched | interposed into the coating material by which stripe application | coating was carried out, each is the thickness direction of a sheet-like base material independently The position may be changed in the direction (that is, the Z direction).

  The gripping position control unit 6E controls the support position changing unit 92 in addition to the configuration of the gripping position control units 6, 6B, 6C, and 6D described above.

Since the double-side coating apparatus 1E has such a configuration, even when stripe coating is performed, the coating thickness can be appropriately controlled over the width direction of the sheet-like substrate.
Furthermore, if it is the structure arrange | positioned in the non-coating part pinched | interposed into the coating material by which stripe application | coating was carried out, it will become possible to control each application | coating thickness of several stripe application | coating independently.

DESCRIPTION OF SYMBOLS 1 Double-side coating apparatus 2 Sheet-like base material conveyance part 3 Application | coating part 4L 1st edge part side holding part 4R 2nd edge part side holding part 5L 1st edge part side holding position change part 5R 2nd edge part side holding position change part 5Lv arrow 5Rv arrow 6 Control unit 6A Gripping position control unit 6B Gripping position control unit 6C Gripping position control unit 6D Gripping position control unit 8 Second surface side application nozzle moving unit 10 Sheet-like substrate (core material)
10c Sheet-like base material after double-sided application 10nL Non-coated part (first end end side) of sheet-like base material after double-sided application
10nR Non-coated part (second end side) of sheet-like substrate after double-sided coating
10 'sheet-like substrate (after drying or after pressing)
DESCRIPTION OF SYMBOLS 21 Conveyance support roller 22 Conveyance support roller 28 Sheet-like base material unwinding part 29 Sheet-like base material winding part 31n 1st surface side application nozzle 31p 1st surface side liquid feed pump 32n 2nd surface side application nozzle 32p 2nd surface Side liquid feed pump 32q Application material protrusion (2nd side application nozzle)
33 Support roller 41L Rotating roller (first end side)
41R Rotating roller (2nd end side)
71 First surface side application end position measurement unit 72 Second surface side application end position measurement unit 75 Second surface side application end part reference position registration unit 81 Rail 82 Y-axis slider 91 Stripe non-coating part support unit 92 Support Position changing part DR Drying part DR1 IR heater DR2 Hot air fan DR3 Cooling nozzle PD Press part PD1 Upper surface side press roller PD2 Lower surface side press roller v Arrow (conveying direction)
Rt direction of rotation

Claims (5)

A double-side coating apparatus that applies a coating material to both sides of a sheet-like substrate,
A transport unit for continuously transporting the sheet-like substrate;
A first surface-side application nozzle that applies a coating material to the first surface side of the sheet-like substrate that is continuously conveyed;
A second surface side application nozzle for applying a coating material to the second surface side of the sheet-like substrate that is continuously conveyed;
The first end side which is one end in the width direction of the sheet-like base material that is continuously conveyed and the second end side that is the other end of the sheet-like base material, which are not coated with the coating material of the sheet-like base material A first end side gripping part and a second end side gripping part for gripping a work part,
The first end side gripping part and the second end side gripping part are arranged on the downstream side in the sheet-like substrate transport direction of the second surface side application nozzle,
A first end side gripping position changing unit that changes the position of the first end side gripping part in the thickness direction of the sheet-like substrate that is continuously conveyed;
A second end side gripping position changing unit that changes the position of the second end side gripping part in the thickness direction of the sheet-like substrate that is continuously conveyed;
A double-side coating apparatus comprising: a gripping position control unit that independently controls the first end side gripping position changing unit and the second end side gripping position changing unit.
A first surface side application end position measurement unit for measuring the application end position of the coating material applied to the first surface side of the sheet-like substrate;
A second surface side application end position measuring unit for measuring the application end position of the coating material applied to the second surface side of the sheet-like substrate,
The grip position control unit is configured such that the application end position of the application material applied to the second surface side of the sheet-like base material approaches the application end position of the application material applied to the first surface side. The double-sided coating apparatus according to claim 1, wherein the first end side gripping position changing unit and the second end side gripping position changing unit are controlled.
A second surface side application end position measurement unit for measuring the application end position of the coating material applied to the second surface side of the sheet-like substrate;
A second surface side application end reference position registration unit that registers the reference position of the application end position of the coating material applied to the second surface side of the sheet-like base material as the second surface side application reference position;
The grip position control unit grips the first end side so that the application end position of the coating material applied to the second surface side of the sheet-like base material approaches the second surface side application reference position. The double-sided coating device according to claim 1, wherein the position changing unit and the second end side gripping position changing unit are controlled.
A second surface side application nozzle moving unit for moving the second surface side application nozzle in the width direction of the sheet-like substrate;
The grip position control unit is configured such that the application end position of the application material applied to the second surface side of the sheet-like base material approaches the application end position of the application material applied to the first surface side. The first end side gripping position changing unit, the second end side gripping position changing unit, and the second surface side application nozzle moving unit are controlled. Double-side coating device.
The first surface side application nozzle and the second surface side application nozzle are for applying a plurality of stripes to the sheet-like substrate,
A non-coated portion supporting portion that supports the non-coated portion between the plurality of stripes applied from the bottom upward, and
A support position changing part that changes the position of the stripe non-coated part support part in the thickness direction of the sheet-like substrate that is continuously conveyed;
The gripping position control unit further controls the support position changing unit,
The double-sided coating apparatus in any one of Claims 1-4.

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