JP2017084545A - Roll press machine and roll press method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for suppressing the occurrence of wrinkles at a non-coated portion adjacent to a coated portion of a continuous sheet-form substrate even at a high rolling rate.SOLUTION: The roll press machine for rolling a continuous sheet-form substrate 1 having a coated portion 2 coated with a coating liquid includes: a base material conveying unit for conveying the continuous sheet-form substrate 1 from an upstream side to a downstream side in a conveying direction; a front side rolling roll 4 and a rear side rolling roll 5 for rolling the coated portion 2 on the continuous sheet-form substrate 1; and auxiliary rolling sections 10, 11 for rolling a non-coated section on the continuous sheet-form substrate adjacent to the coated portion.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a roll press machine and a roll press method for rolling a coating portion such as an active material coated on a continuous sheet-like substrate.

With the increase in capacity of secondary batteries, an active material having an increased coating weight is applied to a continuous sheet-like substrate and dried, followed by rolling to increase the density of the electrodes. Such rolling is continuously rolled (roll press) with a rolling roll while conveying a continuous sheet-like substrate in the conveying direction.

  At that time, the roll press is different from the flat plate press in that an inertial force acts in the conveying direction by a linear pressure load. In addition, the rolling roll contacts and rolls the coated part coated with a thickness on the continuous sheet-like base material, but the rolling roll does not contact the non-coated part where the active material is not coated. Do not apply load. That is, a load is applied only to the coated part and no load is applied to the non-coated part. Therefore, wrinkles occur in the continuous sheet-like base material in the non-coating part adjacent to the coating part due to local load force and inertial force, the electrode peels and falls, the winding failure of the continuous sheet-like base material, or the battery Problems such as deterioration of sealing properties at the time of stacking may occur.

  In Patent Document 1, in order to suppress the occurrence of such wrinkles, the conveyance roller downstream from the press roller (rolling roll) is in contact with only the coating portion of the continuous sheet-like base material, and the non-coating portion Describes a configuration in which no conveying tension is applied.

  Patent Document 1: Japanese Patent Application Laid-Open No. 2014-123491

  However, as described in paragraph 0015, wrinkles are suppressed if the rolling rate is limited as described in paragraph 0015, but if the rolling rate is not limited, a press roller (rolling There is a problem that wrinkles that occur when the roll is removed cannot be suppressed.

This invention solves the said problem and makes it a subject to suppress generation | occurrence | production of the wrinkle in the non-coating part adjacent to the coating part of a continuous sheet-like base material even at a high rolling rate.

  In order to solve the above-mentioned problems, the present invention is a roll press machine for rolling a continuous sheet-like base material partially having a coating portion coated with a coating liquid, the continuous sheet-like base material being On the continuous sheet-like substrate adjacent to the coating unit, a base material conveyance unit that conveys from the upstream to the downstream in the conveying direction, a rolling roll that rolls the coating part in the continuous sheet-like substrate to be conveyed The present invention provides a roll press machine provided with an auxiliary rolling section for rolling the non-coated section.

  With this configuration, the non-coated part of the continuous sheet-like base material is deformed by the auxiliary rolling part, and the deformation rate of the continuous sheet-like base material in the coated part and the continuous sheet-like base material in the non-coated part By slowing down the change between the deformation rate of the sheet, the generation of wrinkles in the non-coated portion adjacent to the coated portion of the continuous sheet-like substrate can be suppressed even at a high rolling rate.

The said rolling roll may be equipped with the front side rolling roll and the back side rolling roll so that the said coating part in both surfaces of the said continuous sheet-like base material may be rolled.

  With this configuration, even if there are coated portions on both sides of the continuous sheet-like substrate, it can be rolled appropriately.

  The auxiliary rolling part may include a front side auxiliary rolling part and a back side auxiliary rolling part so as to roll the non-coated part on both surfaces of the continuous sheet-like substrate.

  With this configuration, even if there are coated portions on both sides of the continuous sheet-like substrate, it is possible to suppress the occurrence of wrinkles in the non-coated portion adjacent to the coated portion.

The auxiliary rolling unit may be constituted by an auxiliary rolling roll disposed upstream of the rolling roll.

  With this configuration, the non-coated portion of the continuous sheet-like substrate can be deformed in advance, and the deformation rate of the continuous sheet-like substrate in the coated portion and the deformation rate of the continuous sheet-like substrate in the non-coated portion As a result, the occurrence of wrinkles in the non-coating portion adjacent to the coating portion of the continuous sheet-like base material can be suppressed.

  The auxiliary rolling part may be constituted by an auxiliary rolling ring formed in an annular shape at a position corresponding to the non-coated part on the surface of the rolling roll.

  With this configuration, the non-coated portion of the continuous sheet-like substrate can be deformed simultaneously with the coated portion, the deformation rate of the continuous sheet-like substrate in the coated portion and the continuous sheet-like substrate in the non-coated portion. Generation | occurrence | production of the wrinkle in the non-coating part adjacent to the coating part of a continuous sheet-like base material can be suppressed because the change between deformation rates blunts.

You may provide the heating part which heats the non-coating part on the said continuous sheet-like base material adjacent to the said coating part upstream of the said auxiliary rolling part.

  With this configuration, the continuous sheet-like base material is soft and easily deformed, the deformation in the auxiliary rolling part can be performed smoothly, and the generation of wrinkles in the non-coating part adjacent to the coating part is more reliably suppressed. be able to.

  Further, in order to solve the above problems, the present invention is a roll press method for rolling a coating part in which a coating liquid is applied to a part of a continuous sheet-like base material, the continuous sheet-like base material being A roll press method characterized by rolling the coated part after or simultaneously with rolling the non-coated part adjacent to the coated part while being conveyed from upstream to downstream in the conveying direction. It is.

  With this configuration, the non-coated part of the continuous sheet-like base material is deformed by the auxiliary rolling part, and the deformation rate of the continuous sheet-like base material in the coated part and the continuous sheet-like base material in the non-coated part By slowing down the change between the deformation rate of the sheet, the generation of wrinkles in the non-coated portion adjacent to the coated portion of the continuous sheet-like substrate can be suppressed even at a high rolling rate.

It is a figure which shows the structure of the roll press machine in Example 1 of this invention. It is a perspective view which shows the rolling part of the continuous sheet-like base material in Example 1 of this invention. It is a side view which shows the rolling part of the continuous sheet-like base material in Example 1 of this invention. It is a figure explaining the deformation rate of a continuous sheet-like base material. It is a figure explaining the deformation rate of the continuous sheet-like base material at the time of providing the auxiliary rolling part in Example 1. FIG. It is a perspective view which shows the rolling part of the continuous sheet-like base material in Example 2 of this invention. It is a side view which shows the rolling part of the continuous sheet-like base material in Example 2 of this invention. It is a perspective view which shows the rolling part of the continuous sheet-like base material in Example 3 of this invention. It is a side view which shows the rolling part of the continuous sheet-like base material in Example 3 of this invention. It is a top view which shows the rolling part of the continuous sheet-like base material in Example 3 of this invention. It is a side view which shows the rolling part of the continuous sheet-like base material in Example 4 of this invention.

Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing a configuration of a roll press machine according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing a rolled portion of the continuous sheet-like substrate in Example 1 of the present invention. FIG. 3 is a side view showing a rolled portion of the continuous sheet-like substrate in Example 1 of the present invention. FIG. 4 is a diagram for explaining the deformation rate of the continuous sheet-like substrate. FIG. 5 is a diagram for explaining the deformation rate of the continuous sheet-like base material when the auxiliary rolling section in Example 1 is provided.

As shown in FIG. 1, the roll press machine 30 in Example 1 of this invention is the unwinding part 31 of the continuous sheet-like base material 1 located upstream, and the winding part of the continuous sheet-like base material 1 located downstream. 32, the base material conveyance part 34 which conveys the continuous sheet-like base material 1 from the upstream to the downstream in the conveyance direction 6, and the rolling part 33 located in the middle of the unwinding part 31 and the winding part 32 are included.

In Example 1 of this invention, as shown in FIG. 2, the conveyance direction 6 of the continuous sheet-like base material 1 is orthogonal to the Y direction, and the width direction of the continuous sheet-like base material 1 is the X direction and the X direction. A direction perpendicular to the Y direction is taken as a Z direction.

In Example 1, the continuous sheet-like base material 1 is made of aluminum or copper, and the coating parts 2 and 3 in which a coating liquid for forming an electrode is continuously applied and dried in the central part thereof are in the Y direction. (See FIGS. 2 and 3). There are non-coating parts on both outer sides of the coating parts 2 and 3 (both ends of the continuous sheet-like base material), and an area of 5 to 10 mm in the width direction of the non-coating part adjacent to the coating part is applied. It is defined as an adjacent area 7.

The number of the coating parts 2 and 3 formed is not limited to one, but may be two or three, or more coating parts may be formed. The width dimension of the coating parts 2 and 3 per one line is about 50-300 mm, and the width dimension of the continuous sheet-like base material 1 is about 100 mm-2000 mm. When two or more coating parts are provided, the non-coating part exists between the coating parts, and the coating part adjacent area 7 exists.

The continuous sheet-like substrate 1 is drawn from the upstream unwinding unit 31 by the substrate conveying unit 34 and conveyed in the conveying direction 6 at a speed of 1 to 300 m / min, guided to the rolling unit 33, and applied as an electrode. The work parts 2 and 3 are rolled. The film thickness of the coating parts 2 and 3 before rolling is 30 μm to 200 μm, but by rolling, the film is compressed and shaped by about 70 to 90%, which contributes to an increase in battery capacity. The rolled continuous sheet-like base material 1 is transported in the transport direction by the base material transport section 34 and is wound in a roll shape by the downstream winding section 32.

The rolling part 33 will be described in detail with reference to FIGS. In the rolling unit 33, two rolling rolls are provided in the Z direction so as to sandwich the continuous sheet-like substrate 1. That is, a front side rolling roll 4 for rolling the front side coating part 2 of the continuous sheet-like substrate 1 and a back side rolling roll 5 for rolling the back side coating part 3 are separated by a distance 2a + b as shown in FIG. It is provided in parallel with the X direction, and its width (dimension in the X direction) is larger than the width of the continuous sheet-like substrate 1.

Here, the front-side rolling roll 4 is applied to the coating portion 2 on the surface of the continuous sheet-like substrate 1, and the back-side rolling roll 5 is applied with a load (0) for rolling the coating portion 3 on the back surface of the continuous-sheet-like substrate 1 respectively. .3 to 3 t / cm). Both the front-side rolling roll 4 and the back-side rolling roll 5 are in contact with the coating part 2 and the coating part 3 of the continuous sheet-like substrate 1 and apply a linear pressure load, but are not in contact with the non-coating part ( Therefore, no load is applied. Moreover, the continuous sheet-like base material 1 exerts an inertial force in the transport direction 6 by the base material transport unit 34. By these local load force and inertial force, wrinkles are generated in the coating portion adjacent area 7 (width dimension is about 5 to 10 mm) adjacent to the coating portions 2 and 3 among the non-coated portions. Thus, if the coating part 2 and the coating part 3 of the continuous sheet-like base material 1 are simply rolled using only the front-side rolling roll 4 and the back-side rolling roll 5, wrinkles are generated in the coating-part adjacent area 7.

The cause of wrinkles occurring in the coating area adjacent area 7 will be discussed with reference to FIG. 4 is a cross-sectional view of the continuous sheet-like substrate 1 when the continuous sheet-like substrate 1 is rolled by the front-side rolling roll 4 and the back-side rolling roll 5 (the description of the front-side rolling roll 4 and the back-side rolling roll 5 is omitted). And the deformation rate of the continuous sheet-like substrate 1 during rolling along the width direction (X direction). That is, although the continuous sheet-like base material 1 in the coating parts 2 and 3 to which the front-side rolling roll 4 and the back-side rolling roll 5 are rolled has a high deformation rate due to the application of a load due to rolling, The deformation rate of the continuous sheet-like base material 1 in the work part is zero. That is, by rolling the coating parts 2 and 3 and not rolling the non-coating part, the coating parts 2 and 3 and the non-coating part in the width direction of the continuous sheet-like substrate 1 as shown in FIG. It is considered that wrinkles occur in the coating portion adjacent area 7 because the deformation rate changes abruptly at the boundary portion. In Example 1, in order to suppress generation | occurrence | production of this wrinkle, the auxiliary rolling part is provided in the coating part adjacent area 7 of the upstream of the front side rolling roll 4 and the back side rolling roll 5.

In Example 1, the auxiliary rolling part includes a front side auxiliary rolling part that rolls the coating part adjacent area 7 that is a non-coating part adjacent to the coating part on the surface of the continuous sheet-like substrate 1, and a continuous sheet-like base. The back side auxiliary rolling part which rolls the coating part adjacent area 7 which is a non-coating part adjacent to the coating part in the back surface of the material 1 consists of. That is, as a front side auxiliary rolling part, in FIG. 2, a front side auxiliary rolling roll 10 that rolls the coating part adjacent area 7 on the back side in the X direction and a front side auxiliary rolling roll that rolls the coating part adjacent area 7 on the front side in the X direction. 11 is provided. Moreover, as a back side auxiliary rolling part, in FIG. 2, the back side auxiliary rolling roll 12 (not shown in FIG. 2) for rolling the coating part adjacent area 7 on the back side in the X direction, and the coating part adjacent to the front side in the X direction. A back side auxiliary rolling roll 13 (not shown in FIG. 2) for rolling the area 7 is provided. Moreover, the front side auxiliary rolling roll 10 and the back side auxiliary rolling roll 12 are arranged in the non-coating part adjacent to the coating parts 2 and 3 so as to sandwich the continuous sheet-like substrate 1 on the same Y coordinate, The auxiliary rolling roll 11 and the back auxiliary rolling roll 13 are arranged in a non-coating part adjacent to the coating parts 2 and 3 so as to sandwich the continuous sheet-like substrate 1 on the same Y coordinate.

Here, the effect with respect to the continuous sheet-like base material 1 of an auxiliary rolling part is demonstrated with reference to FIG. FIG. 5 shows a case where auxiliary rolling sections, that is, front side auxiliary rolling rolls 10 and 11 and back side auxiliary rolling rolls 12 and 13 (not shown in FIG. 5) are provided upstream of the front side rolling roll 4 and the back side rolling roll 5. Sectional drawing of the continuous sheet-like base material 1 when the continuous sheet-like base material 1 in Example 1 which is is rolled with the front side rolling roll 4 and the back side rolling roll 5 (the description of the front side rolling roll 4 and the back side rolling roll 5 is It is a figure which showed the deformation rate of the continuous sheet-like base material 1 at the time of rolling along the width direction (X direction). As shown in FIG. 5, the continuous sheet-like base material 1 in the coating parts 2 and 3 to which the front-side rolling roll 4 and the back-side rolling roll 5 roll has a high deformation rate due to the application of a load by rolling as in the case of FIG. . On the other hand, the coating part adjacent area 7 of the continuous sheet-like substrate 1 in the auxiliary rolling part is deformed in advance by applying a load by rolling, and the deformation in the coating part adjacent area 7 rolled in the auxiliary rolling part as shown in FIG. The rate is lower than the deformation rate by the front side roll 4 and the back side roll 5 but larger than zero, and the deformation rate decreases in steps. That is, there exists an intermediate deformation rate in the coating portion adjacent area 7 between the deformation rate in the coating portions 2 and 3 of the continuous sheet-like base material 1 and the deformation rate in the non-coating portion, so that the auxiliary rolling portion The change in the deformation rate when the auxiliary rolling portion is present is slower than the change in the deformation rate when there is no.

Thus, the front side auxiliary rolling rolls 10 and 11 and the back side auxiliary are set so that the deformation rate in the coating portion adjacent area 7 is about halfway between the deformation rate in the coating portions 2 and 3 and the deformation rate in the non-coating portion. The load of the rolling rolls 12 and 13 is set.

By the rolling of this auxiliary rolling part, the coating part adjacent area 7 of the continuous sheet-like substrate 1 is deformed to be smaller than the coating parts 2 and 3, and the deformation at the boundary between the coating parts 2 and 3 and the non-coating part described above. The change in rate is slowed and the generation of wrinkles is suppressed.

In Example 1, the diameters of the front side auxiliary rolling rolls 10 and 11 and the back side auxiliary rolling rolls 12 and 13 are smaller than the diameters of the rolling rolls 4 and 5, as shown in FIGS. However, it is not necessarily limited to this. In other words, it is only necessary that the coated portion adjacent area 7 can be rolled with a predetermined load. For example, it may be equal to the diameter of the rolling rolls 4 and 5 or may be larger than the diameter of the rolling rolls 4 and 5.

In addition, in Example 1, although the coating parts 2 and 3 formed in the continuous sheet-like base material 1 were made into 1 each on the surface and the back surface of the continuous sheet-like base material 1, it is not necessarily limited to this. . For example, two strips may be formed on the front surface and / or the back surface, or more coating portions may be formed. In addition, on at least one of the front and back surfaces of the continuous sheet-like substrate 1, one or more coating portions 2 and 3 may be formed intermittently along the Y direction instead of continuously.

Moreover, in Example 1, although the coating part is formed in the surface and back surface of the continuous sheet-like base material 1, it is not necessarily limited to this. The coating part may be formed only on the front surface or only on the back surface. In that case, it may replace with the rolling roll of the surface in which the coating part is not formed, and an auxiliary rolling roll, and you may make it roll only with a rolling roll and an auxiliary rolling roll by providing a flat plate.

In Example 1, the front auxiliary rolling rolls 10 and 11 are adjacent to the coating part 2 so as to roll the coating part adjacent area 7 among the non-coating parts on the surface of the continuous sheet-like substrate 1. The back side auxiliary rolling rolls 12 and 13 are provided adjacent to the coating part 3 so as to roll the coating part adjacent area 7 out of the non-coated part on the back surface of the continuous sheet-like substrate 1, It is not necessarily limited to this. What is necessary is just to provide so that the non-coating part of the continuous sheet-like base material 1 may be rolled so that the coating part adjacent area 7 of the surface and back surface of the continuous sheet-like base material 1 may be included at least, for example, a continuous sheet-like base material Even if the widths of the front side auxiliary rolling rolls 10 and 11 and the back side auxiliary rolling rolls 12 and 13 are made large so as to roll the entire width direction of the continuous sheet-like substrate 1 in the uncoated portions on the front surface and the back surface of 1 Good.

  As described above, it is a roll press machine for rolling a continuous sheet-like base material partially having a coating part coated with a coating liquid, and the continuous sheet-like base material is transported from upstream to downstream in the transport direction. Rolling a base material transport unit to be transported, a rolling roll for rolling the coating portion in the continuous sheet base material to be transported, and a non-coating portion on the continuous sheet base material adjacent to the coating portion By forming a roll press machine comprising an auxiliary rolling part, the auxiliary rolling part deforms by rolling the non-coated part of the continuous sheet-like substrate, and the continuous sheet form in the coated part The non-coated part adjacent to the coated part of the continuous sheet-like base material even at a high rolling rate by slowing the change between the deformation rate of the base material and the deformation rate of the continuous sheet-like base material in the non-coated part The generation of wrinkles can be suppressed.

  In addition, it is a roll press method for rolling a coating part in which a coating liquid is applied to a part of a continuous sheet-like base material, while transporting the continuous sheet-like base material from upstream to downstream in the transport direction, After rolling the non-coating part adjacent to the coating part or simultaneously with the roll press method, the non-coating part of the continuous sheet-like base material is characterized by rolling the coating part. It is deformed by being rolled, and the change between the deformation rate of the continuous sheet-like base material in the coated part and the deformation rate of the continuous sheet-like base material in the non-coated part is slowed down, so that even at a high rolling rate, continuous Generation | occurrence | production of the wrinkle in the non-coating part adjacent to the coating part of a sheet-like base material can be suppressed.

Example 2 of the present invention is an example in that, in addition to the configuration of Example 1, a heating unit for heating the non-coated part of the continuous sheet-like substrate 1 is provided upstream of the rolling roll and the auxiliary rolling part. 1 and different.

A second embodiment of the present invention will be described in detail with reference to FIGS. FIG. 6 is a perspective view showing a rolled portion of a continuous sheet-like substrate in Example 2 of the present invention. FIG. 7: is a side view which shows the rolling part of the continuous sheet-like base material in Example 2 of this invention.

In Example 2, the heating part is provided upstream of the front side rolling roll 4, the back side rolling roll 5, and the auxiliary rolling part (that is, the front side auxiliary rolling rolls 10, 11 and the back side auxiliary rolling rolls 12, 13). The heating unit includes a front side heating unit that injects hot air onto the surface of the continuous sheet-like substrate 1 and a back side heating unit that injects hot air onto the back surface of the continuous sheet-like substrate 1. That is, as the front side heating unit, in FIG. 6 and FIG. 7, the front side hot air nozzle 20 that heats the coating portion adjacent area 7 on the back side in the X direction and the front side hot air nozzle that heats the coating portion adjacent area 7 on the front side in the X direction. 21 is provided. Moreover, as a back side heating part, in FIG. 6, FIG. 7, the back side hot air nozzle 22 which heats the coating part adjacent area 7 of the X direction back side, and the back side hot air nozzle which heats the coating part adjacent area 7 of the X direction front side 23 is provided. Further, the hot air is guided from the known hot air generator (not shown) to the front hot air nozzles 20 and 21 and the back hot air nozzles 22 and 23 and is ejected.

Heating of the heating part makes the coated sheet adjacent area 7 of the continuous sheet-like substrate 1 soft, so that it is easily deformed, and deformation by rolling in the auxiliary rolling part becomes easy. For example, when the continuous sheet-like substrate 1 is composed of pure aluminum, the elongation at normal temperature is about 40% as a physical property value, but the elongation is 70 to 80% by setting the temperature to 200 to 300 ° C. It is supposed to be.

In Example 2, in addition to the front side auxiliary rolling rolls 10 and 11 and the back side auxiliary rolling rolls 12 and 13, the front side hot air nozzles 20 and 21 and the back side hot air nozzles 22 and 23 were provided, so that the front side auxiliary rolling rolls were provided. Since 10, 11 and the back side auxiliary rolling rolls 12 and 13 can perform auxiliary rolling with a small load, generation of wrinkles in the non-coating portion adjacent to the coating portion can be further suppressed.

In Example 2, the front hot air nozzles 20 and 21 are provided on the surface of the continuous sheet-like substrate 1, and the back hot air nozzles 22 and 23 are provided on the back surface of the continuous sheet-like substrate 1. It is not limited to. What is necessary is just to heat to such an extent that the coating part adjacent area 7 of the continuous sheet-like base material 1 becomes soft. For example, if the heating is sufficient, only the front hot air nozzles 20 and 21 may be provided, or only the hot air nozzles 22 and 23 on the back surface may be provided. Moreover, when a coating part is 2 or more, it is good also as a structure which provides a hot air nozzle also in the non-coating part between coating parts.

Moreover, in Example 2, although the front side hot air nozzles 20 and 21 were provided as the front side heating part and the back side hot air nozzles 22 and 23 were provided as the back side heating part, it is not necessarily limited to this. You may comprise a heating part with another heat source. For example, you may comprise with an induction heating part, a lamp | ramp, etc. Moreover, you may provide another kind of heating part by the front side and back side of the continuous sheet-like base material 1. FIG.

  As described above, in the second embodiment of the present invention, in addition to the configuration of the first embodiment, a heating unit that heats the non-coating portion adjacent to the coating portion is provided upstream of the rolling roll and the auxiliary rolling portion. Because the non-coated part of the continuous sheet-like base material is softened by heating with the heating part, it can be auxiliary rolled with a small load, and even at a high rolling rate, the non-coated part adjacent to the continuous sheet-like base material coated part It is possible to further suppress the generation of wrinkles at the part.

In Example 3 of the present invention, the auxiliary rolling part in Example 1 is replaced with an auxiliary rolling roll, and the auxiliary rolling part is provided in an annular shape at a position corresponding to the non-coating part adjacent to the coating part on the surface of the rolling roll. It differs from Example 1 by the point made into the rolling ring.

A third embodiment of the present invention will be described in detail with reference to FIG. 8, FIG. 9, and FIG. FIG. 8 is a perspective view showing a rolled portion of a continuous sheet-like substrate in Example 3 of the present invention. FIG. 9 is a side view showing a rolled portion of a continuous sheet-like substrate in Example 3 of the present invention. FIG. 10 is a plan view showing a rolled portion of a continuous sheet-like substrate in Example 3 of the present invention.

Also in Example 3, as shown in FIG. 8, the conveyance direction 6 of the continuous sheet-like substrate 1 is the Y direction, and the width direction of the continuous sheet-like substrate 1 is orthogonal to the Y direction, the X direction, the X direction, and the Y direction. The direction orthogonal to is the Z direction.

As shown in FIGS. 8, 9, and 10, annular front auxiliary rolling rings 110 and 111 are arranged on the surface of the front rolling roll 4 at positions corresponding to the non-coating portion adjacent to the coating portion on the surface of the front rolling roll 4. It protrudes from the surface of the. Further, annular back side auxiliary rolling rings 112, 113 are formed so as to protrude from the surface of the back side rolling roll 5 at positions corresponding to the non-coating part adjacent to the coating part on the surface of the back side rolling roll 5. And the front side auxiliary rolling ring 110 and the back side auxiliary rolling ring 112 are positioned on the same Y coordinate so as to be sandwiched with the continuous sheet-like substrate 1, and the front side auxiliary rolling ring 111 and the back side auxiliary rolling ring 113 are continuous. It is located on the same Y coordinate so that the coating part adjacent area 7 of the sheet-like base material 1 may be inserted | pinched.

Simultaneously with the rolling of the coating parts 2 and 3 by the front side rolling roll 4 and the back side rolling roll 5, the front side auxiliary rolling ring 110 and the back side auxiliary rolling ring 112 and the front side auxiliary rolling ring 111 and the back side auxiliary rolling ring 113 are applied. The non-coated part of the work part adjacent area 7 is rolled. As a result, the coating portion adjacent area 7 is also rolled and deformed simultaneously with the coating portions 2 and 3, so that the deformation ratio in the coating portions 2 and 3 and the deformation ratio in the non-coating portion of the continuous sheet-like substrate 1. And the occurrence of wrinkles in the coating portion adjacent area 7 is suppressed.

Here, the annular front side auxiliary rolling rings 110 and 111 are processed by a member different from the rolling roll 4 and fixed to the rolling roll 4, and the annular back side auxiliary rolling rings 112 and 113 are rolled. The rolling roll 4 may be processed by a member different from the roll 5 and fixed to the rolling roll 5, or the rolling roll 4 may be processed so as to have the annular front side auxiliary rolling rings 110, 111 with a single member. Alternatively, the rolling roll 5 may be formed so as to have the annular back side auxiliary rolling rings 112 and 113 with a single member.

In Example 3, the front side auxiliary rolling rings 110 and 111 are coated on the surface of the rolling roll 4 so as to roll the coated portion adjacent area 7 among the non-coated portions on the surface of the continuous sheet-like substrate 1. Back side auxiliary rolling is provided adjacent to the coating portion 2 at a position corresponding to the processing portion adjacent area 7, and the coating portion adjacent area 7 is rolled out of the non-coated portion on the back surface of the continuous sheet-like substrate 1. Although the rings 112 and 113 are provided adjacent to the coating portion 3, the present invention is not necessarily limited thereto. What is necessary is just to provide so that the non-coating part of the continuous sheet-like base material 1 may be rolled so that the coating part adjacent area 7 of the surface and back surface of the continuous sheet-like base material 1 may be included at least, for example, a continuous sheet-like base material Even if the widths of the front side auxiliary rolling rings 110 and 111 and the back side auxiliary rolling rings 112 and 113 are made large so that the entire width direction of the continuous sheet-like substrate 1 in the uncoated portions on the front surface and the back surface of 1 is rolled. Good.

As described above, in Example 3 of the present invention, an auxiliary rolling ring is formed at a position corresponding to the non-coating portion adjacent to the coating portion on the surface of the rolling roll, and the coating portion is rolled by the rolling roll. At the same time, since the non-coated part is rolled by the auxiliary rolling ring, the non-coated part of the continuous sheet-like base material is deformed to about half of the coated part, and the non-coated part of the continuous sheet-like base material is uncoated. The change in the deformation rate at the boundary with the work part is slowed down, and the generation of wrinkles in the non-coating part adjacent to the coating part can be suppressed.

In addition to the configuration of Example 3, Example 4 of the present invention includes a heating unit that heats a non-coating part adjacent to the coating part of the continuous sheet-like substrate 1 upstream of the rolling roll and the auxiliary rolling part. It differs from Example 3 in the point provided.

A fourth embodiment of the present invention will be described in detail with reference to FIG. FIG. 11: is a side view which shows the rolling part of the continuous sheet-like base material in Example 4 of this invention.

In Example 4, the heating part is provided upstream of the front side rolling roll 4, the back side rolling roll 5, and the auxiliary rolling part (that is, the front side auxiliary rolling rings 110 and 111 and the back side auxiliary rolling rings 112 and 113). The heating unit includes a front side heating unit that injects hot air onto the surface of the continuous sheet-like substrate 1 and a back side heating unit that injects hot air onto the back surface of the continuous sheet-like substrate 1. That is, as the front heating unit, a front hot air nozzle 20 that heats the coating portion adjacent area 7 on the back side in the X direction in FIG. 11 and a front hot air nozzle 21 that heats the coating portion adjacent area 7 on the front side in the X direction are provided. It has been. Further, as the back side heating unit, a back side hot air nozzle 22 for heating the coating portion adjacent area 7 on the back side in the X direction in FIG. 11 and a back side hot air nozzle 23 for heating the coating portion adjacent area 7 on the near side in the X direction are provided. It has been. Further, the hot air is guided from the known hot air generator (not shown) to the front hot air nozzles 20 and 21 and the back hot air nozzles 22 and 23 and is ejected.

Heating of the heating part makes the coated sheet adjacent area 7 of the continuous sheet-like substrate 1 soft, so that it is easily deformed, and deformation by rolling in the auxiliary rolling part becomes easy. For example, when the continuous sheet-like base material 1 is composed of pure aluminum, the elongation at room temperature is about 40% as a physical property value, but the elongation becomes 70 to 80% by setting the temperature to 200 to 300 ° C. Has been.

In Example 4, in addition to the front side auxiliary rolling rings 110 and 111 and the back side auxiliary rolling rings 112 and 113, the front side hot air nozzles 20 and 21 and the back side hot air nozzles 22 and 23 are provided, so that the front side auxiliary rolling rings are provided. Since 110 and 111 and the back side auxiliary rolling rings 112 and 113 can be auxiliary rolled with a small load, the generation of wrinkles in the non-coated portion adjacent to the coated portion can be further suppressed.

In Example 4, the front hot air nozzles 20 and 21 are provided on the surface of the continuous sheet-like base material 1 and the back hot air nozzles 22 and 23 are provided on the back surface of the continuous sheet-like base material 1. It is not limited to. What is necessary is just to heat to such an extent that the coating part adjacent area 7 of the continuous sheet-like base material 1 becomes soft. For example, if heating is sufficient, only the front hot air nozzles 20 and 21 may be provided, or only the back hot air nozzles 22 and 23 may be provided. Moreover, when a coating part is 2 or more, it is good also as a structure which provides a hot air nozzle also in the non-coating part between coating parts.

Moreover, in Example 4, although the front side hot air nozzles 20 and 21 were provided as the front side heating part, and the back side hot air nozzles 22 and 23 were provided as the back side heating part, it is not necessarily limited to this. You may comprise a heating part with another heat source. For example, you may comprise with an induction heating part, a lamp | ramp, etc. Moreover, you may provide another kind of heating part by the front side and back side of the continuous sheet-like base material 1. FIG.

  As described above, in Example 4 of the present invention, in addition to the configuration of Example 3, a heating unit for heating the non-coating part adjacent to the coating part is provided upstream of the rolling roll and the auxiliary rolling part. Because the non-coated part of the continuous sheet-like base material is softened by heating with the heating part, it can be auxiliary rolled with a small load, and even at a high rolling rate, the non-coated part adjacent to the continuous sheet-like base material coated part It is possible to further suppress the generation of wrinkles at the part.

The present invention is not limited to the electrodes of secondary batteries, and can be widely applied to rolling continuous sheet-like substrates.

1: Continuous sheet-like base material 2: Coating part 3: Coating part 4: Front side rolling roll 5: Back side rolling roll 6: Conveying direction 7: Coating part adjacent area 10: Front side auxiliary rolling roll 11: Front side auxiliary rolling roll 12: Back side auxiliary rolling roll 13: Back side auxiliary rolling roll 110: Front side auxiliary rolling ring 111: Front side auxiliary rolling ring 112: Back side auxiliary rolling ring 113: Back side auxiliary rolling ring 20: Front side hot air nozzle 21: Front side hot air nozzle 22: Back side hot air Nozzle 23: Back side hot air nozzle 30: Roll press machine 31: Unwinding part 32: Winding part 33: Rolling part 34: Substrate conveying part

Claims (7)

  A roll press machine for rolling a continuous sheet-like base material partially having a coating part coated with a coating liquid, and transporting the continuous sheet-like base material from upstream to downstream in the transport direction A rolling roll that rolls the coated portion of the continuous sheet-like substrate to be conveyed, and an auxiliary rolling portion that rolls a non-coated portion on the continuous sheet-like substrate adjacent to the coated portion. A roll press machine comprising:   The roll press according to claim 1, wherein the rolling roll includes a front side rolling roll and a back side rolling roll so as to roll the coated portion on both surfaces of the continuous sheet-like base material. .   The said auxiliary rolling part was provided with the front side auxiliary rolling part and the back side auxiliary rolling part so that the said non-coating part in both surfaces of the said continuous sheet-like base material might be rolled. A roll press machine according to 1.   The roll pressing machine according to any one of claims 1 to 3, wherein the auxiliary rolling unit is an auxiliary rolling roll disposed upstream of the rolling roll.   The roll pressing machine according to any one of claims 1 to 3, wherein the auxiliary rolling part is an auxiliary rolling ring formed in an annular shape at a position corresponding to the non-coated part on the surface of the rolling roll. .   The heating part which heats the non-coating part on the said continuous sheet-like base material adjacent to the said coating part upstream of the said auxiliary | assistant rolling part is provided. Roll press machine.   A roll press method for rolling a coating portion in which a coating liquid is applied to a part of a continuous sheet-like substrate, wherein the coating is performed while conveying the continuous sheet-like substrate from upstream to downstream in a conveyance direction. A roll press method characterized by rolling the coated part after or simultaneously with rolling the non-coated part adjacent to the working part.

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