JP2008284528A - Method and apparatus for simultaneously applying paste on front surface and back surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the technology capable of securing the coating grade of foil in both side simultaneous coating by improving the positioning accuracy of the foil introduced into a coating part to improve the coating accuracy and stably transporting the foil after the both surface simultaneous coating in the both surface simultaneous coating of the foil with paste. <P>SOLUTION: The technology is constituted so that the foil is held so that the distance between a surface coating die 3 and the foil is equal to the distance between a rear surface coating die 4 and the foil by a surface side guide roller 5 and a rear side guide roller 6 which are provided in the foil carrying-in side of a pair of the surface coating die 3 and the rear surface coating die 4 and are foil regulating means, and a tension is imparted to the foil by a tension roller 7 being a tension imparting means provided on the foil carry out side of a pair of the coating die 3 and 4 so as to cause no slackness of the foil after paste is applied. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technique for simultaneously applying a paste to the front and back of a foil, and more particularly to a technique for improving the coating quality in the case of simultaneous application.

In the production of conventional battery electrodes, etc., as a method of applying the paste to both the front and back surfaces of the electrode foil, the paste is first applied to either the front surface or the back surface of the electrode foil. After drying the paste in the drying oven as the second drying step, apply the paste to the other side again, and then dry the paste in the drying oven as the second drying step and apply the paste on both sides of the foil The technology to do is generally well known. However, in this method, since it is necessary to go through two drying steps, there is a problem that the line of the coating equipment becomes long.
Also, when applying the paste to both front and back sides of the foil, it is difficult to carry the foil stably because the roller cannot be brought into contact with either the front or back side immediately after applying the paste. There was a problem.

In order to shorten the line length of the coating equipment in a single drying process, it is effective to apply the paste on both sides of the foil at the same time. Has been studied and developed and is publicly known.
For example, a configuration in which a pair of elastic sealing materials arranged opposite to each other is provided in the upstream portion of the coating portion where the paste is applied by a pair of dies, and the foil is supplied to the coating portion through a gap formed by the elastic sealing material. In addition, a technique is disclosed in which the coating quality is improved by preventing the fluttering of the foil and ensuring the airtightness of the coating part to prevent the deterioration (oxidation) of the paste (patent document). 1).
JP-A-9-94509

  However, in the prior art, the foil is positioned by an elastic sealing material, and the foil can be displaced within a range where the sealing material is elastically deformed. In other words, since the foil may be introduced to one of the dies (front side or back side) with respect to the coating part, the positioning accuracy of the foil carried into the coating part should be ensured. Thus, it was difficult to ensure the coating quality.

  Moreover, in order to ensure coating quality, it is necessary not only to ensure coating accuracy, but also to carry the coating so as not to damage the coated surface after coating. In other words, in the foil transport after paste coating, it is necessary to transport the coating surface not to be damaged especially on the transport path leading to the drying process, but immediately after applying the paste on both sides of the foil. However, it was difficult to bring a normal carrying roller into contact with either front or back surface, and it was difficult to stably carry the foil immediately after double-sided coating.

For example, paste is applied so that the left and right ends of the conventional foil are left uncoated, and the foil is transported while the left and right uncoated portions are sandwiched between clamps and rollers and the coated surface is not damaged. However, it is difficult to apply tension to the foil evenly by the conventional method using clamps or rollers, and the foil being transported is not wrinkled or loosened. Occurrence cannot be completely prevented, so that the sandwiching portion does not contact the coated surface, but the coated surface may be damaged during the conveyance.
The present invention has been made in view of the present situation, and in the case of performing double-sided simultaneous coating of paste on the foil, the positioning accuracy of the foil introduced into the coating portion is improved to improve the coating accuracy. At the same time, it is an object to provide a technique capable of ensuring the coating quality by the simultaneous coating on both sides by stably conveying the foil after the simultaneous coating on both sides.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, a pair of coating dies composed of a front surface coating die and a back surface coating die are arranged to face each other, and on the front and back of the foil that passes through the gap between the pair of coating dies. On the other hand, a paste front and back simultaneous coating method for simultaneously applying the paste, the distance between the surface coating die and the foil by the foil regulating means provided on the foil carry-in side of the pair of coating dies And paste application by tension applying means for holding the foil so that the distance between the backside coating die and the foil is equal, and provided on the foil unloading side of the pair of coating dies. It is characterized in that tension is applied so that the later foil does not sag.

  In Claim 2, the said foil control means consists of the surface side guide roller integrally formed in the said surface coating die, and the back surface side guide roller integrally formed in the said back surface coating die. , Is characterized by that.

  According to a third aspect of the present invention, the tension applying means includes a pair of tension rollers that sandwich uncoated edge portions formed on the left and right with respect to the transport direction of the foil.

  According to a fourth aspect of the present invention, the tension roller includes a plurality of roller members, and the roller members are arranged at substantially equal intervals in a direction parallel to the foil transport direction, and the foil transport direction and the foil roller The roller member is arranged so as to gradually expand toward the downstream side in the transport direction of the foil within a range in which the angle formed by the rotation axis of the roller member is 90 degrees or less.

  The plurality of roller members constituting the tension roller are connected via a link mechanism, and an angle formed by the conveyance direction of the foil and the rotation axis of each roller member is adjusted by the link mechanism. It is possible to make it possible.

  In Claim 6, it is equipped with a pair of coating die which consists of the surface coating die | dye and back surface coating die which are mutually opposingly arranged, with respect to the front and back of the foil which passes the clearance gap between this pair of coating die | dye A paste front and back simultaneous coating apparatus for simultaneously applying a paste, disposed on the foil carry-in side of the pair of coating dies, the distance between the surface coating die and the foil, and the back surface The foil regulating means for holding the foil so that the distance between the coating die and the foil is equal, and the foil is disposed on the foil unloading side of the pair of coating dies, and is loosened in the foil after paste coating And a tension applying means for applying tension so as not to occur.

  In Claim 7, the said foil control means consists of the surface side guide roller integrally formed in the said surface coating die, and the back surface side guide roller formed integrally in the said back surface coating die. , Is characterized by that.

  According to an eighth aspect of the present invention, the tension applying means includes a pair of tension rollers that sandwich uncoated edge portions formed on the left and right with respect to the transport direction of the foil.

  In claim 9, the tension roller is composed of a plurality of roller members, and the roller members are arranged at substantially equal intervals in a direction parallel to the foil transport direction, and the foil transport direction and the foil roller The roller member is arranged so as to gradually expand toward the downstream side in the transport direction of the foil within a range in which the angle formed by the rotation axis of the roller member is 90 degrees or less.

  11. The plurality of roller members constituting the tension roller are connected via a link mechanism, and the link mechanism adjusts an angle formed by the transport direction of the foil and the rotation axis of each roller member. It is possible to make it possible.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, by providing the guide roller immediately before the coating portion, it becomes possible to make the coating thicknesses of the front and back surfaces uniform, contributing to the improvement of coating accuracy. In addition, by providing a tension roller immediately after the coating portion, it is possible to adjust the tension acting on the foil immediately after coating, so that the foil can be conveyed while maintaining a good coating state. . Thereby, the coating quality when performing double-sided simultaneous coating of the paste on the foil can be improved.

  In Claim 2, it becomes possible to equalize the coating thickness of front and back easily, and it can contribute to the improvement of coating accuracy. Moreover, adjustment of coating thickness can be made easy.

  In claim 3, the tension acting on the foil can be easily adjusted, and the foil can be conveyed while maintaining a good coating state.

  In Claim 4, the tension | tensile_strength which acts on a conveyance direction downstream with respect to foil, and the tension | tensile_strength which acts on the left-right direction with respect to a conveyance direction can be provided.

  In Claim 5, adjustment of the tension | tensile_strength provided to foil can be made easy.

  According to the sixth aspect, by providing the guide roller immediately before the coating portion, it becomes possible to make the coating thicknesses of the front and back surfaces uniform, which contributes to the improvement of the coating accuracy. In addition, by providing a tension roller immediately after the coating portion, it is possible to adjust the tension acting on the foil immediately after coating, so that the foil can be conveyed while maintaining a good coating state. . Thereby, the coating quality when performing double-sided simultaneous coating of the paste on the foil can be improved.

  In Claim 7, it becomes possible to equalize the coating thickness of front and back easily, and it can contribute to the improvement of coating accuracy. Moreover, adjustment of coating thickness can be made easy.

  In claim 8, the tension acting on the foil can be easily adjusted, and the foil can be conveyed while maintaining a good coating state.

  According to the ninth aspect of the present invention, it is possible to apply a tension acting on the foil downstream in the transport direction and a tension acting in the left-right direction with respect to the transport direction.

  In Claim 10, adjustment of the tension | tensile_strength provided to foil can be made easy.

Next, embodiments of the invention will be described.
FIG. 1 is a schematic diagram showing a configuration around a coating portion of a coating apparatus according to a first embodiment of the present invention, FIG. 2 is a perspective view, FIG. 3 is a plan view, and FIG. 4 is an embodiment of the present invention. FIG. 5 is a schematic diagram showing a configuration around a coating portion of a coating apparatus according to a second embodiment of the present invention, FIG. 6 is a perspective view, and FIG. FIG. 8 is a schematic diagram showing a structure of a link mechanism according to an embodiment of the present invention, FIG. 9 is a schematic diagram showing a tension roller, and FIG. 10 is a conventional coating. FIG. 11 is a schematic diagram showing the configuration around the coating unit, and FIG. 12 is a schematic diagram showing a conventional conveying method during simultaneous double-side coating.

First, the configuration of a conventional coating apparatus will be described.
As shown in FIG. 10 (a), in the conventional coating apparatus 50, as a method of applying the paste to both surfaces (front and back) of the foil, first, the paste is applied to the surface by the surface coating die 51, and thereafter The paste is dried by the first drying furnace 52. Next, the paste is applied to the back surface by the back surface coating die 53, and then the paste is dried by the second drying furnace 54. In addition, as for the conveyance in each drying furnace 52 * 54, a hot air is alternately blown on the foil in the vertical direction substantially upward and in the vertical direction substantially downward, so that the foil is floated and conveyed while meandering in a substantially sine wave shape in a side view. Thus, the conveyance is performed without contacting the foil and the coating surface.
According to this method, since the back-up rollers 57 and 58 can be provided in the front and back coating portions 55 and 56, the paste can be applied to the foil with high accuracy. There is a problem that the length of the coating line becomes long.

As shown in FIG. 10B, in the conventional coating apparatus 60, as a method of applying the paste to both surfaces (front and back) of the foil, first, the paste is applied to the surface by the surface coating die 61, Next, after the paste is applied to the back surface by the back surface coating die 62, the paste is dried by the drying furnace 63.
According to this method, since the coating of the paste is completed on the front and back surfaces on the upstream side of the drying furnace 63, the drying process can be completed only once. However, if the coating timing of the front surface and the back surface is shifted, the backup roller 64 can be provided in the front surface coating portion 66, but the backup roller 65 cannot be provided in the back surface coating portion 67. For this reason, as shown in FIG.10 (c), in the coating part 67 of a back surface, since the foil is pressed and floated by the paste applied, the behavior of the foil is not stabilized, and as a result, on the front surface and the back surface. There is a problem in that the accuracy of the coated surface varies, and the coating accuracy is lowered and it is difficult to ensure the coating quality.

Further, as shown in FIG. 11 (a), there has conventionally been a configuration in which a front surface coating die 70 and a back surface coating die 71 are disposed to face each other, and paste is simultaneously applied to both surfaces (front and back) of the foil. Although employed, the distance between the transport roller 72 and the coating unit 73 that regulates the position of the foil sent to each coating die 70 and 71 is separated, and the foil is between the transport roller 72 and the coating unit 73. The displacement (gap) between the foil and each of the coating dies 70 and 71 could not be kept constant if vibrations or the like occurred in the foil being conveyed.
For this reason, as shown in FIG. 11B, there is a problem in that the coating thickness of each of the coating dies 70 and 71 varies, and it is difficult to ensure the coating accuracy. Depending on the requirements of the required quality of the coated surface, such variations in coating accuracy may not be a problem. In such a case, a double-sided simultaneous coating method as shown in FIG. It was possible in the past.

Moreover, when performing double-sided simultaneous coating, since the foil immediately after double-sided simultaneous coating cannot make a roller contact with any surface, it is necessary to consider a conveyance method. Therefore, conventionally, a method has been adopted in which a range in which the paste is not applied (uncoated part) is provided at the left and right side edges of the foil, and the uncoated part is sandwiched and conveyed.
For example, as shown in FIG. 12 (a), a configuration in which a plurality of conveyance clamps 74, 74,... Are provided and conveyance is performed while the uncoated portion of the foil is sandwiched between the conveyance clamps 74 is known. ing. However, in such a transport method, when a gap occurs between the positions clamped by the transport clamps 74, 74..., Slack as shown in FIG. In some cases, wrinkles as shown in FIG. In other words, in the conventional transport method, immediately after applying the paste, it is not possible to transport the foil while maintaining a state in which an appropriate tension is applied. There is a problem that it is difficult to ensure the coating quality.

From such a situation, it is conventionally required to ensure a certain coating quality, and when applying the paste on both sides of the foil, the above-described FIG. In general, coating is performed one side at a time on the front or back surface by the method shown in FIG.
In other words, when it is required to ensure a certain coating quality, in order to be able to apply the method by simultaneous double-sided coating, at the same time as ensuring the coating accuracy in the coating part, It was necessary to realize a stable conveyance of the foil.
The present invention solves the problems of conventional double-sided simultaneous coating while ensuring a certain coating quality, after ensuring the coating accuracy in the coating part and double-sided simultaneous coating This realizes the stable conveyance of the foil at the same time and expands the usable range of simultaneous double-sided coating.

Next, the structure of the coating part of the coating apparatus which concerns on 1st Example of this invention is demonstrated. In the following description, for convenience of explanation, the direction of arrow A shown in FIG.
As shown in FIG. 1, the coating unit 2 of the coating apparatus 1 according to the first embodiment of the present invention includes a pair of coatings composed of a front coating die 3 and a back coating die 4 that are arranged to face each other. An industrial die is provided, and the pair of coating dies is configured to simultaneously apply the paste to the front and back surfaces of the foil passing through the gap between the pair of coating dies.
In the coating unit 2, on the downstream side of the transport roller 25 for transporting the foil to the coating unit 2 and on the upstream side of the surface coating die 3 and the back surface coating die 4, the surface side A guide roller 5 and a back side guide roller 6 are provided. The guide rollers 5 and 6 are arranged in parallel to each other and in a direction perpendicular to the conveying direction of the foil so that the roller surfaces are in contact with each other. And it is set as the structure which passes the contact part of each guide roller 5 * 6 and introduces foil in the coating part 2. FIG. As a result, the position of the foil can be regulated at a position closer to the coating portion 2 as compared with the conventional case, and the vibration generated in the foil being conveyed can be suppressed, and the foil and each coating die 3 can be controlled. -The distance (gap) from 4 can be kept constant.

Moreover, in the coating part 2 of the coating apparatus 1 which concerns on 1st Example of this invention, in the right-and-left uncoated edge part of the downstream of the surface coating die | dye 3 and the back surface coating die | dye 4, it is several. A tension roller 7 composed of a roller is provided.
As shown in FIGS. 1 to 3, the tension roller 7 is composed of a pair of upper and lower surface side tension rollers 8 and a back surface side tension roller 9.
The front side tension roller 8 is composed of a pair of left and right front roller groups 8L and 8R, and in this embodiment, each of the roller groups 8L and 8R is composed of four rollers. The surface-side tension roller 8 is constituted by eight rollers (that is, the rollers 8aL, 8bL, 8cL, 8dL, 8aR, 8bR, 8cR, and 8dR shown in FIG. 2).

  Similarly, the back-side tension roller 9 is composed of a pair of left-right left-side roller group 9L and back-side right-side roller group 9R. In this embodiment, each of the roller groups 9L and 9R is composed of four rollers. The back side tension roller 9 is configured by a total of eight rollers (that is, the rollers 9aL, 9bL, 9cL, 9dL, 9aR, 9bR, 9cR, and 9dR shown in FIG. 2).

In the side view, the tension rollers 8 and 9 are arranged so as to be line-symmetric with each other with the foil interposed therebetween, and the upper and lower (front and back) corresponding rollers are arranged at positions so as to contact each other. .
In other words, taking the right roller groups 8R and 9R shown in FIG. 1A as an example, the rollers 8aR, 8bR, 8cR and 8dR constituting the front right roller group 8R and the back right roller group 9R are constituted. The rollers 9aR, 9bR, 9cR, and 9dR correspond to each other. More specifically, the rollers 8aR and 9aR, the rollers 8bR and 9bR, the rollers 8cR and 9cR, and the rollers 8dR and 9dR correspond to each other. . The left roller groups 8L and 9L have the same correspondence.

  In this way, the tension applying means for the foil is constituted by the tension roller 7 that sandwiches the uncoated edge formed on the left and right with respect to the foil transport direction, so that each roller contacts the coated paste. Therefore, immediately after applying the paste on the upstream side of the drying process, the tension applied to the foil can be adjusted at a position where the influence of the expansion and contraction of the foil is small, without causing the foil to slack. The foil can be conveyed while maintaining a good coating state.

  Each roller constituting the tension roller 7 (that is, the rollers 8aL, 8bL, 8cL, 8dL, 8aR, 8bR, 8cR, and 8dR and the rollers 9aL, 9bL, 9cL, 9dL, 9aR, 9bR, 9cR, and 9dR) is a foil. Rotating shafts arranged in a direction perpendicular to the rotating shaft (that is, rotating shafts 8eL, 8fL, 8gL, 8hL, 8eR, 8fR, 8gR, 8hR and rotating shafts 9eL, 9fL, 9gL, 9hL, 9eR, 9fR, 9gR · 9hR), whereby each roller can be rotated about each rotation axis. In addition, each of the rotation shafts is arranged in parallel with the foil transport direction and at substantially equal intervals along the foil transport direction in plan view.

  Further, as shown in FIG. 3 or FIG. 4, the tension rollers 8 and 9 rotate the respective rollers constituting the tension roller 7 around the respective rotation shafts, and in the plan view, the respective tension rollers 8 and 9 The angle formed by the rotation axis of the roller (that is, the angles θ1 to θ4 shown in FIG. 4B) is configured to gradually increase toward the downstream side in the transport direction. However, the angle formed by the most downstream rotation axis (here, θ4) is configured to be 90 degrees or less, and in this embodiment, θ4 = 90 degrees.

  More specifically, for example, as shown in FIG. 4B, the rotation shafts 8iR, 8jR, 8kR, and 8mR of the rollers 8aR, 8bR, 8cR, and 8dR that constitute the front right roller group 8R On the other hand, they are arranged at angles of θ1, θ2, θ3, and θ4, respectively. Each of the rollers 8aR, 8bR, 8cR, and 8dR is configured to rotate at the same number of rotations. At the point where the rollers 8aR, 8bR, 8cR, and 8dR are in contact with the foil, the rollers 8aR, 8bR, 8cR, and 8dR are foils. On the other hand, the same tension (ie, tensions T1 to T4 shown in FIG. 4) in the rotational tangent direction of each roller is applied.

  In FIG. 4C, the tensions T1 to T4 applied by the rollers are divided into component forces X1 to X4 in the foil transport direction and component forces Y1 to Y4 in a direction perpendicular to the foil transport direction. These are shown separately. Then, it can confirm that the magnitude | size of each component force with respect to the conveyance direction of foil has the relationship of X1 <X2 <X3 <X4. Further, it is confirmed that the magnitude of each component force in the direction perpendicular to the foil transport direction has a relationship of Y1> Y2> Y3> Y4 (where X4 = T4 and Y4 = 0). it can. Here, each component force is confirmed only for the front right roller group 8R, but in each of the other roller groups, the component force in the foil transport direction and the component force in the direction perpendicular to the foil transport direction are also shown. Have a similar relationship.

That is, each of the rollers 8aR, 8bR, 8cR, and 8dR is configured to gradually increase the angles θ1 to θ4 toward the downstream side of the foil transport direction, so that the downstream side of the foil transport direction is closer to the downstream side. A large tension is applied in the downstream direction, and a greater tension is applied in the left-right direction toward the upstream side in a direction perpendicular to the conveyance direction of the foil.
In this way, by applying a structure in which tension in the transport direction downstream side and in the left-right direction is gradually changed in accordance with the transport direction, an appropriate tension can be applied to the foil even at a location where the roller cannot contact the coated surface. Thus, there is no slackness in the foil being conveyed, and the foil can be stably conveyed while ensuring the quality of the coated surface.
In this embodiment, an example is shown in which each roller group 8L, 8R, 9L, and 9R is configured by using four rollers. However, the number of rollers constituting each roller group is limited to this. Instead, it is possible to form a roller group with 3 or less rollers, or to form a roller group with 5 or more rollers, and it is determined appropriately according to the specifications (width, thickness, etc.) of the foil to be used. be able to.
Further, in the present embodiment, an example is shown in which the tension rollers 8 and 9 are configured by using a plurality of rollers driven at the same rotational speed. However, for example, a configuration in which the rotational speed is increased as the downstream roller is increased. The drive rotation speed of the roller constituting the tension roller according to the present invention is not limited.

That is, the surface coating die 3 and the foil are separated by the surface side guide roller 5 and the back side guide roller 6 which are foil regulating means provided on the foil carry-in side of the pair of surface coating die 3 and back surface coating die 4. A tension roller 7 serving as a tension applying means that holds the foil so that the distance is equal to the distance between the back surface coating die 4 and the foil and is provided on the foil unloading side of the pair of coating dies 3 and 4 Thus, a tension is applied so that slack does not occur in the foil after paste coating.
Thus, by providing the guide rollers 5 and 6 immediately before the coating part 2, it becomes possible to equalize the coating thickness of the front and back, contributing to the improvement of the coating accuracy, and further, the coating part By providing the tension roller 7 immediately after 2, the tension acting on the foil can be adjusted immediately after coating, so that the foil can be conveyed while maintaining a good coating state. Thereby, the coating quality when performing double-sided simultaneous coating of the paste on the foil can be improved.

The tension roller 7 includes a plurality of roller members (that is, rollers 8aL, 8bL, 8cL, 8dL, 8aR, 8bR, 8cR, and 8dR and rollers 9aL, 9bL, 9cL, 9dL, 9aR, 9bR, 9cR, and 9dR). The roller members are disposed at substantially equal intervals in a direction parallel to the foil transport direction, and the angle between the foil transport direction and the rotation axis of each roller member is 90 degrees or less. Each roller member is arranged so as to gradually expand toward the downstream side in the transport direction.
Thereby, the tension | tensile_strength which acts on the downstream of a conveyance direction with respect to foil, and the tension | tensile_strength which acts on the left-right direction with respect to a conveyance direction can be provided effectively, without contacting a paste.

Next, the structure of the coating part of the coating apparatus which concerns on 2nd Example of this invention is demonstrated.
As shown in FIG. 5 or FIG. 6, the coating part 11 of the coating apparatus 10 according to the present invention is similar to the coating part 2 of the coating apparatus 1 according to the first embodiment described above. The front-side guide roller 14 and the back-side guide roller 15 are provided on the upstream side of the foil transport, and the tension roller 16 is provided on the downstream side of the foil transport of the coating unit 11. And in this 2nd Example, the surface side guide roller 14 was comprised integrally with the surface coating die | dye 12, and the back surface side guide roller 15 was comprised integrally with the back surface coating die | dye 13. This is different from the coating apparatus 1 according to the first embodiment, and is characterized in this respect.

  A support shaft 12a is fixedly provided at a lower portion on the upstream side of the surface coating die 12 in the foil transport direction, and the surface side guide roller 14 is rotatably supported on the support shaft 12a. Similarly, a support shaft 13a is fixed on the upstream side of the back coating die 13 in the foil transport direction, and the back side guide roller 15 is rotatably supported on the support shaft 13a. It is said.

  As described above, the guide rollers 14 and 15 are integrated with the coating dies 12 and 13 so that the guide rollers 14 and 15 are closer to the coating portion 11. Is possible. By setting it as such a structure, the vibration of the foil supplied to the coating part 11 can be suppressed more effectively, and it can contribute to the stable supply of foil.

Next, a method for adjusting the paste coating thickness will be described.
Conventionally, when adjusting the coating thickness of the paste, the position is adjusted by moving each coating die up and down. Conventionally, the distance between the equipment base, which is a base point, and each coating die which is an actual movable part is large. For this reason, unless the rigidity and dimensional accuracy of the base member supporting each coating die are secured, the positioning accuracy of each coating die cannot be secured. Further, in this case, many error elements such as bending of the base member are interposed, and it is difficult to improve the dimensional accuracy of the coating thickness.

As shown in FIG. 7, the coating dies 12 and 13 according to the present invention rotate the coating dies 12 and 13 around the support shafts 12a and 13a around the guide rollers 14 and 15, respectively. Can be made. With such a configuration, the distance (gap) between the coating dies 12 and 13 and the foil can be adjusted by changing the rotation angle of the coating dies 12 and 13. This makes it possible to easily adjust the coating thickness of the paste.
Further, since the guide rollers 14 and 15 serving as the base points are integrally supported with respect to the coating dies 12 and 13, they are interposed between the base points and the movable parts as compared with the conventional configuration. There are few error factors, and by ensuring the rigidity of each member such as each guide roller 14,15, each support shaft 12a, 13a, and each coating die 12,13, the dimensional accuracy of the coating thickness can be easily secured. can do.

  In other words, by making the coating dies 12 and 13 and the guide rollers 14 and 15 into an integral configuration, it is possible to bring the regulation position of the foil by the guide rollers 14 and 15 closer to the coating portion 11. Thus, the coating quality can be improved by contributing to the improvement of positioning accuracy of the coating dies 12 and 13 while contributing to further vibration suppression of the foil.

  Thus, the foil regulating means is the front side guide roller 14 which is a front side driven roller integrally formed with the front surface coating die 12 and the back side driven roller integrally formed with the back surface coating die 13. By adopting a configuration comprising the back-side guide roller 15, it is possible to easily make the coating thicknesses of the front and back surfaces uniform and contribute to the improvement of coating accuracy. Further, the adjustment of the coating thickness can be facilitated with high accuracy.

As shown in FIG. 6, the tension roller 16 is composed of a pair of upper and lower surface side tension rollers 17 and a back surface side tension roller 18 in the same manner as the tension roller 7 according to the first embodiment.
The front side tension roller 17 is composed of a pair of left and right front surface roller groups 17L and 17R, and in this embodiment, each roller group 17L and 17R is composed of four rollers. The surface-side tension roller 17 is constituted by a total of eight rollers (that is, the rollers 17aL, 17bL, 17cL, 17dL, 17aR, 17bR, 17cR, and 17dR shown in FIG. 6).

  Similarly, the back surface side tension roller 18 is composed of a pair of left and right back surface roller groups 18L and 18R, and in this embodiment, each of the roller groups 18L and 18R is composed of four rollers. The back-side tension roller 18 is configured by a total of eight rollers (that is, the rollers 18aL, 18bL, 18cL, 18dL, 18aR, 18bR, 18cR, and 18dR shown in FIG. 6).

  Similarly to the tension roller 7 according to the first embodiment, the rollers constituting the tension roller 16 according to the second embodiment (that is, rollers 17aL, 17bL, 17cL, 17dL, 17aR, 17bR, 17cR, 17dR, and rollers) 18aL, 18bL, 18cL, 18dL, 18aR, 18bR, 18cR, and 18dR are rotating shafts arranged in a direction perpendicular to the foil (that is, rotating shafts 17eL, 17fL, 17gL, 17hL, 17eR, 17fR, 17gR / 17hR and rotating shafts 18eL / 18fL / 18gL / 18hL / 18eR / 18fR / 18gR / 18hR), so that each roller can rotate about each rotating shaft. Yes. In addition, each of the rotation shafts is arranged in parallel with the foil transport direction and at substantially equal intervals along the foil transport direction in plan view.

  As shown in FIG. 6, in the coating apparatus 10 according to the second embodiment of the present invention, the tension roller 16 disposed on the downstream side of each of the coating dies 12 and 13 includes each roller group (that is, a roller). Each roller group constituting each roller group is connected to each other by a link mechanism 19, 20, 21, 22 for each of the groups 17 L, 17 R, 18 L, 18 R). Each link mechanism 19, 20, 21, and 22 is composed of a main link bar and a plurality of sub link bars.

Further, as shown in FIG. 8, the surface right roller group 17R will be described in detail as an example. The main link bar 19a and the four sub link bars 19b, 19c, 19d, and 19e constituting the link mechanism 19 are flat plate members made of steel plates. The sub link bars 19b, 19c, 19d, and 19e are supported so as to be rotatable relative to the main link bar 19a.
The other sub link bars (that is, the sub link bars 19c and 19d) other than the sub link bars (that is, the sub link bars 19b and 19e) supported at both ends of the main link bar 19a are formed on the main link bar 19a. The long holes 19f and 19g are used to support the main link bar 19a so as to be displaceable within the long holes 19f and 19g with respect to the long side direction of the main link bar 19a. Thus, even if the lengths of the sub link bars are different, the sub link bars 19c and 19d can be displaced according to the displacement of the main link bar 19a.

Furthermore, each roller (that is, each roller 17aR, 17bR, 17cR, and 17dR shown in FIG. 8) constituting the front surface right side roller group 17R cannot be rotated relative to the sub link bars 19b, 19c, 19d, and 19e, respectively. It is fixed.
The lengths of the sub link bars 19b, 19c, 19d, and 19e (L1 to L4 shown in FIG. 8) have a relationship of L1 <L2 <L3 <L4.

  With such a configuration, by displacing the main link bar 19a, each of the sub link bars 19b, 19c, 19d, and 19e can be rotated at a time, so that each of the rollers 17aR, 17bR, 17cR, and 17d. Can be rotated simultaneously. Further, the lengths of the sub link bars 19b, 19c, 19d, and 19e are set to the relationship (L1 <L2 <L3 <L4), so that the rotation angles of the rollers 17aR, 17bR, 17cR, and 17d It is set as the structure rotated so that it may differ little according to length.

Specifically, as shown in FIG. 8, by operating the main link bar 19a, the rollers 17aR, 17bR, 17cR, and 17d are rotated all at once, and the rotation angles become θb to θe shown in FIG. It is configured. Here, the angles θb to θe have a relationship of θb <θc <θd <θe corresponding to the lengths of the sub link bars 19b, 19c, 19d, and 19e (L1 to L4 shown in FIG. 8). ing.
In this way, since the rotation angle of each roller can be set according to the length of each sub link bar, if the length of the sub link bar is taken into consideration at the time of design, the tension applied to the foil It is possible to easily set the size and set the tension difference between the rollers.

  It should be noted that it is desirable that the rollers continue to be driven even if the angles of the rollers 17aR, 17bR, 17cR, and 17d are changed. As shown in FIG. 9, the roller 17aR will be described as an example. The motor 23 serving as a drive source is integrally formed with the roller 17aR, the sub link bar 19b is rotated, and the roller 17aR is rotated about the rotation shaft 17eR. In this case, the motor 23 can be rotated accordingly. Alternatively, the driving source and the rotating shaft of the roller are connected via a universal joint or the like, and the driving shaft of the driving source and the rotating shaft can be driven even if they are not on the same straight line. A configuration corresponding to the change is also possible.

  A detailed description of the link mechanisms 20, 21, and 22 provided in each of the roller groups 17L, 18R, and 18L other than the front right roller group 17R is omitted, but the main link bar and the plurality of link mechanisms are also omitted for these other link mechanisms. The sub-link bar is configured in the same manner as the link mechanism 19 provided in the surface right side roller group 17R, although the arrangement of the upper, lower, left and right sides is different.

That is, a plurality of roller members constituting the tension roller 7 (that is, the roller groups 17L, 17R, 18L, and 18R) are connected via the link mechanisms 19, 20, 21, and 22, and the link mechanisms 19, 20, and 21 are connected. 22 is configured to be able to adjust the angle formed by the foil transport direction and the rotation axis of each roller member.
Thereby, the tension | tensile_strength provided to foil can be easily adjusted according to the specification (width | variety, thickness, etc.) of the foil to be used.

The schematic diagram which shows the structure of the coating part periphery of the coating apparatus which concerns on the 1st Example of this invention. Similarly perspective view. FIG. The schematic diagram which shows the structure of the tension roller which concerns on one Example of this invention. The schematic diagram which shows the structure of the coating part periphery of the coating apparatus which concerns on the 2nd Example of this invention. Similarly perspective view. The side surface schematic diagram which similarly shows the adjustment condition of coating thickness. The schematic diagram which shows the structure of the link mechanism which concerns on one Example of this invention. The schematic diagram which similarly shows a tension roller. The schematic diagram which shows the double-sided simultaneous coating method which concerns on the conventional coating apparatus. The schematic diagram which similarly shows the structure of the coating part periphery. The schematic diagram which shows the conveying method at the time of the conventional double-sided simultaneous coating.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coating apparatus 2 Coating part 3 Surface coating die 4 Back surface coating die 5 Front surface side guide roller 6 Back surface side guide roller 7 Tension roller

Claims (10)

A pair of coating dies composed of a front surface coating die and a back surface coating die are arranged facing each other,
For the front and back of the foil that passes through the gap between the pair of coating dies,
A method for simultaneously applying the paste to the front and back of the paste,
By the foil regulating means provided on the foil carry-in side of the pair of coating dies,
The distance between the surface coating die and the foil;
Holding the foil so that the distance between the back coating die and the foil is equal, and
By tension applying means provided on the foil carry-out side of the pair of coating dies,
Apply tension so that the foil after paste coating does not sag,
The paste front and back simultaneous coating method characterized by this. The foil regulating means is
A surface side guide roller formed integrally with the surface coating die;
Consists of a backside guide roller formed integrally with the backside coating die,
The paste simultaneous coating method according to claim 1. The tension applying means includes
It consists of a pair of tension rollers that sandwich an uncoated edge formed on the left and right with respect to the transport direction of the foil,
The method for simultaneously applying the front and back surfaces of the paste according to claim 1 or 2. The tension roller is
Consisting of multiple roller members,
While arranging each roller member at substantially equal intervals in a direction parallel to the conveying direction of the foil,
The roller member is disposed so as to gradually expand toward the downstream side in the foil transport direction, within an angle of 90 degrees or less between the foil transport direction and the rotation axis of the roller member.
The paste front and back simultaneous coating method according to any one of claims 1 to 3, wherein: The plurality of roller members constituting the tension roller are:
Connected through a link mechanism,
By the link mechanism, it is possible to adjust an angle formed by the conveyance direction of the foil and the rotation axis of each roller member.
The paste front and back simultaneous coating method according to claim 4. It is provided with a pair of coating dies composed of a front surface coating die and a back surface coating die that are arranged opposite to each other, and the paste is simultaneously applied to the front and back surfaces of the foil that passes through the gap between the pair of coating dies. A device for simultaneously applying the front and back surfaces of the paste to be processed,
The foil is disposed on the foil carry-in side of the pair of coating dies, and the distance between the front surface coating die and the foil and the distance between the back surface coating die and the foil are equalized. Foil control means to hold,
A tension applying means that is disposed on the foil carry-out side of the pair of coating dies and applies tension so that the foil after paste coating does not sag.
A paste front and back simultaneous coating apparatus characterized by that. The foil regulating means is
A surface side guide roller formed integrally with the surface coating die;
Consists of a backside guide roller formed integrally with the backside coating die,
The apparatus for simultaneously applying the front and back surfaces of the paste according to claim 6. The tension applying means includes
It consists of a pair of tension rollers that sandwich an uncoated edge formed on the left and right with respect to the transport direction of the foil,
The paste front and back simultaneous coating apparatus according to claim 6 or 7, wherein: The tension roller is
Consisting of multiple roller members,
While arranging each roller member at substantially equal intervals in a direction parallel to the conveying direction of the foil,
The roller member is disposed so as to gradually expand toward the downstream side in the foil transport direction, within an angle of 90 degrees or less between the foil transport direction and the rotation axis of the roller member.
9. The paste front and back simultaneous coating apparatus according to any one of claims 6 to 8, wherein: The plurality of roller members constituting the tension roller are:
Connected through a link mechanism,
By the link mechanism, it is possible to adjust an angle formed by the conveyance direction of the foil and the rotation axis of each roller member.
The apparatus for simultaneously applying the front and back surfaces of the paste according to claim 9.

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