JP2015145683A - Press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press device capable of removing foreign objects strongly adhering to a press surface.SOLUTION: A press device 40 comprises press rolls 41 each pressurizing an active material layer 12b from a direction crossing an application surface 11a of a metal foil 11. The press device 40 also comprises removal rolls 44 each removing foreign objects G adhering to a press surface 43a of each press roll 41. The removal rolls 44 each include a plurality of rubber projections 48 and grooves 49 facing the press surface 43a of each press roll 41 and extending in an axial direction of the removal rolls 44 to be aligned in a circumferential direction of the removal rolls 44.

Description

  The present invention relates to a press apparatus that pressurizes with a press roll from a direction intersecting a surface of a base sheet.

  As a secondary battery which is a kind of power storage device, a lithium ion secondary battery, a nickel hydride secondary battery, and the like are known. For example, a lithium ion secondary battery includes a case and an electrode assembly in which a positive electrode and a negative electrode each including an active material layer are stacked or wound in a metal foil. In manufacturing the electrodes of each electrode, first, an active material paste in which an active material, a conductive agent, a solvent, and a binder are mixed is applied to the surface of the metal foil of each electrode. Thereafter, the active material paste is dried in a drying furnace to form an active material layer, and an electrode material having a metal foil and an active material layer is formed. Then, in order to increase the density of the obtained active material layer, the active material layer is pressurized. This pressurization is performed by pressing the active material layer with a press roll, for example, from the direction intersecting the surface of the metal foil. The press roll is cylindrical and has a metal press surface on the outer peripheral surface. Thereafter, the electrode material is cut into a shape along the outer shape of the electrode. Then, a tab etc. are formed from metal foil and an electrode is manufactured.

  By the way, when the active material layer is pressurized, the active material particles and foreign matter contained in the active material layer may be peeled off and adhere to the press surface of the press roll. If there is foreign matter on the pressed surface, when the active material layer is pressed with a press roll, the foreign matter is pressed against the active material layer, and the surface of the active material layer after pressing is caused by the foreign matter. In other words, the foreign matter is transferred to the active material layer, and a convex portion is generated on the surface of the coated active material layer.

  Problems due to the adhesion of foreign matter to the press roll have been known as a common problem when using the press roll, and as a countermeasure, foreign matter that has adhered to the press surface of the press roll can be transferred using the transfer roll. Removal has been proposed (see, for example, Patent Document 1). In patent document 1, the roll surface of a transfer roll is made to contact the press surface of a press roll, and the foreign material adhering to a press surface is transcribe | transferred to the roll surface of a transfer roll. And the roll surface of an adhesive roll is made to contact the roll surface of a transfer roll, and the foreign material adhering to the roll surface of a transfer roll is removed with the adhesive roll. In addition, the adhesive force in the roll surface of an adhesive roll is higher than the adhesive force in the roll surface of a transfer roll. The adhesive strength of the transfer roll and the pressure-sensitive adhesive roll is based on the pressure-sensitive adhesive, and for example, a rubber-based or urethane-based pressure-sensitive adhesive is used as an example of the pressure-sensitive adhesive.

JP 2003-33923 A

  By the way, in the manufacture of an electrode, the active material layer contains an active material, a conductive agent, and a binder. May adhere to. The active material layer is pressed at a high pressure. For this reason, when the hard active material adheres to the press surface of the press roll with a high pressure applied through a binder having a strong adhesive force, the transfer roll has an adhesive force from the press surface of the press roll. It is difficult to remove foreign matter.

  It is an object of the present invention to provide a press apparatus that can remove foreign matters firmly adhered to a press surface.

  A pressing device for solving the above problems is a pressing device that pressurizes a layer formed on at least one surface of a long base sheet with a press roll from a direction intersecting the surface of the base sheet. A removal roll for removing foreign matter adhering to the press surface of the press roll, the removal roll is disposed opposite to the press surface of the press roll, and the removal roll is an outer periphery of the removal roll. A gist is provided with a surface layer made of an elastic body covering the surface, and a groove formed in the surface layer, extending in the axial direction of the removal roll, and arranged in a plurality in the circumferential direction of the removal roll. .

  According to this, at the timing when the groove of the removing roll comes closest to the foreign matter attached to the press surface, the foreign matter enters the groove and the foreign matter is sandwiched between the groove forming surfaces adjacent to the groove. Further, the groove forming surface can apply a force to the foreign material in the direction of peeling from the press surface. As a result, the foreign matter can be peeled off from the press surface by the groove forming surface as the press roll rotates. For this reason, even if the foreign matter adhering to the press surface bites into the press surface in a state where a high pressure is applied via a strong adhesive force, the foreign matter adhering to the press surface can be removed by the removing roll.

Moreover, about a press apparatus, the said groove | channel may be formed in a fixed width | variety and the protrusion may be arrange | positioned adjacent to the said groove | channel.
According to this, in the protrusion adjacent to the groove, a groove forming surface is formed by the side surface sandwiching the groove. And if a foreign material enters a groove | channel, a foreign material can be pinched | interposed between protrusions. Moreover, the force to the direction peeled off from a press surface can be applied with respect to a foreign material with a protrusion.

Moreover, about the press apparatus, the longitudinal direction of the said groove | channel may incline with respect to the axial direction of the said roll for removal.
Accordingly, the groove forming surface can be brought into contact with the foreign matter moving in the rotation direction of the press roll in an inclined state, not parallel to the rotation direction, and the foreign matter can be easily peeled off.

  Further, for the press device, the removal roll includes a muscle roll portion provided with the groove, and a plurality of muscle roll portions are arranged in parallel in the axial direction of the removal roll, and in the axial direction of the removal roll, The direction of inclination of the grooves may be alternately reversed.

  According to this, the axial thrust force acting on the press surface from the removing roll can be canceled out.

  According to the present invention, it is possible to remove the foreign matter firmly adhered to the press surface.

The figure which shows the production equipment of an electrode typically. The side view which shows a press apparatus. The fragmentary sectional view which shows the roll for removal. The front view which shows the roll for removal. The front view which shows a press apparatus. (A) is a figure which shows the state which peels off a foreign material, (b) is sectional drawing which shows the state which peeled off the foreign material. (A) is a diagram showing a state in which foreign matter has adhered to the press surface, (b) is a diagram showing a state in which the foreign matter has been peeled off by a removal roll, and (c) is a diagram showing a state in which the foreign matter has been conveyed by a removal roll. (D) is a figure which shows the state which removed the foreign material with the adhesion roll. The figure which shows another example of the roll for removal. The figure which shows the press apparatus provided with the removal roller for assistance.

Hereinafter, an embodiment embodying a press apparatus will be described with reference to FIGS.
As shown in FIG. 1, a production facility 10 for manufacturing an electrode used for a lithium ion secondary battery as a power storage device has a paste-like material on a coating surface 11 a that is both surfaces of a metal foil 11 as a base sheet. In this facility, the active material paste 12 is applied to form a layer 12 a of the active material paste 12 on the metal foil 11. Further, the production facility 10 is an facility for forming an active material layer by pressurizing the active material layer 12b after the active material paste 12 layer 12a is dried to form the active material layer 12b. Note that the active material paste 12 is obtained by kneading an active material, a conductive agent, a binder, and a solvent. In addition, the active material paste 12 may include a foreign substance G such as an agglomerate in which the active material is aggregated by a binder or a coarse particle having a large particle size.

  The production facility 10 applies an active material paste 12 to the metal foil 11 to form a layer 12a of the active material paste 12, a drying device 30 that dries the layer 12a of the active material paste 12, And a pressing device 40 that pressurizes the active material layer 12b.

  In the production facility 10, the metal foil 11 is wound around the supply roll 36a with the longitudinal direction extending in the circumferential direction of the supply roll 36a. In the metal foil 11, the direction perpendicular to the longitudinal direction is the short direction of the metal foil 11. The supply roll 36a is rotatably supported by a support device (not shown).

  Further, the metal foil 11 is wound around the winding roll 39a with the longitudinal direction extending in the circumferential direction of the winding roll 39a. The winding roll 39a is rotatably supported by a support device (not shown). The winding roll 39a rotates at a constant rotation speed and winds up the metal foil 11 on which the active material layer is formed. Therefore, the metal foil 11 supplied from the supply roll 36a is wound around the winding roll 39a, whereby the metal foil 11 is transported along the transport direction X.

  The coating apparatus 20 includes a first slit die 20b, and a discharge port (not shown) of the first slit die 20b is disposed below the metal foil 11 so as to face one application surface 11a of the metal foil 11. Yes. Further, the coating apparatus 20 includes a second slit die 20a, and an ejection port (not shown) of the second slit die 20a is disposed above the metal foil 11 so as to face the other application surface 11a of the metal foil 11. Has been. In the coating apparatus 20, the coating method of the active material paste 12 may be other than the slit die method.

  And from the discharge port of the 1st slit die 20b, the active material paste 12 is continuously apply | coated to one application surface 11a of the metal foil 11 sent out from the supply roll 36a, and the active material paste 12 is applied to the application surface 11a. Layer 12a is formed. Further, from the discharge port of the second slit die 20a, the active material paste 12 is continuously applied to the other application surface 11a of the metal foil 11 fed from the supply roll 36a, and the active material paste is applied to the other application surface 11a. Twelve layers 12a are formed.

  The drying device 30 includes a dryer 30a, and the dryer 30a heats air with heat from a heat source and supplies hot air, whereby the layer of the active material paste 12 on the metal foil 11 that passes through the interior of the dryer 30a. Dry 12a. As a result, the solvent contained in the active material paste 12 evaporates, and the binder is cured by heat, and the active material and the conductive auxiliary agent are fixed to each other, thereby forming the active material layer 12b.

Next, the press device 40 will be described.
The press device 40 is disposed on both the application surfaces 11a side of the metal foil 11, and faces a pair of press rolls 41 that pressurize the active material layer 12b from a direction orthogonal to both the application surfaces 11a (crossing direction). Prepare.

  As shown in FIG. 2, the press roll 41 has a metal and columnar main body portion 42 and a metal and cylindrical press portion 43 integrated on the outer peripheral surface of the main body portion 42. The press roll 41 includes a metal press surface 43 a on the outer peripheral surface of the press portion 43. The press roll 41 is rotated by a drive source (not shown), and the press roll 41 is rotated in the rotation direction Y1 along the transport direction X of the metal foil 11.

  The press device 40 includes a removing roll 44 disposed on the downstream side of the press roll 41 in the transport direction X of the metal foil 11. The removal roll 44 is arranged such that its axial direction is parallel to the axial direction of the press roll 41.

  As shown in FIGS. 3 and 4, the removal roll 44 includes a cylindrical and metal roll body 45. Further, the removing roll 44 includes a rubber muscle roll portion 46 that is an elastic body, and the muscle roll portion 46 is attached to the outer periphery of the roll body 45. In the present embodiment, the three muscle roll portions 46 are juxtaposed in the axial direction of the roll body 45. In addition, it is preferable to use the thing whose rubber | gum hardness is durometer hardness 5-30 for the muscle roll part 46, and it is especially preferable to use the thing of durometer hardness 5-10.

  The muscle roll portion 46 includes a cylindrical base portion 47 as a surface layer, and includes a plurality of protrusions 48 on the outer peripheral surface of the base portion 47, and each protrusion 48 is arranged over the entire circumferential direction of the base portion 47. Yes. The protrusion height H of the protrusion 48 from the outer peripheral surface of the base 47 is set to be shorter than the particle size of the foreign matter G described above. The plurality of ridges 48 are arranged at equal intervals in the circumferential direction of the base portion 47, and the muscle roll portion 46 has a groove 49 between the ridges 48 adjacent to each other in the circumferential direction of the base portion 47. In other words, the ridge 48 is disposed on the base 47 adjacent to the groove 49. In this embodiment, in each protrusion 48, the inner side surface of the protrusion 48 that defines the groove 49 is a groove forming surface. Further, the removing roll 44 includes a plurality of grooves 49 that extend in the axial direction and are arranged in the circumferential direction.

  If the width between the protrusions 48 adjacent to each other in the circumferential direction of the base 47 is the opening width W of the groove 49, the opening width W of the groove 49 is set to be narrower than the particle size of the foreign matter G. . Further, since the protrusion 48 is made of rubber, the protrusion 48 can be elastically deformed in the direction in which the opening width W of the groove 49 is enlarged. And it is possible to insert the foreign material G between the protrusions 48 adjacent to each other in the circumferential direction.

  In the present embodiment, the three muscle roll portions 46 are juxtaposed in the axial direction of the roll body 45. The removal roll 44 is arranged in a state where the protrusions 48 and the grooves 49 are opposed to the press surface 43 a of the press roll 41. That is, the removal roll 44 includes three base portions 47 as a surface layer covering the outer peripheral surface of the removal roll 44, and protrusions 48 and grooves 49 formed on each base portion 47. The longitudinal direction of the protrusion 48 and the groove 49 is slightly inclined with respect to the axial direction of the roll body 45 (removal roll 44). The inclination angle of the protrusion 48 and the groove 49 with respect to the axial direction of the removing roll 44 is preferably set to 3 to 30 degrees, more preferably 5 to 10 degrees.

  The two muscle roll portions 46 mounted on both sides of the roll body 45 in the axial direction are inclined so that the longitudinal directions of the protrusions 48 and the grooves 49 extend upward to the left, and are mounted at the center of the roll body 45 in the axial direction. The strip roll portion 46 is inclined so that the longitudinal direction of the protrusion 48 and the groove 49 extends to the right. Therefore, in the removing roll 44, the inclination directions of the protrusions 48 and the grooves 49 are reversed between the muscle roll portions 46 adjacent in the axial direction.

  As shown in FIG. 2, the removal roll 44 rotates following the press roll 41, and the rotation direction Y <b> 2 of the removal roll 44 is opposite to the rotation direction Y <b> 1 of the press roll 41. The press roll 41 and the removing roll 44 that rotate in the opposite directions have a protrusion 48 facing the press surface 43a at the timing closest to each other, and the press surface at the front end in the protruding direction from the base 47. 43a is in line contact. Each protrusion 48 is in line contact with the press surface 43 a while being inclined with respect to the axial direction of the press roll 41.

  The pressing device 40 includes an adhesive roll 50 disposed on the downstream side of the removing roll 44 in the transport direction X of the metal foil 11. The adhesive roll 50 includes a columnar and metal main body 51. The adhesive roll 50 includes a cylindrical and rubber adhesive part 52, and the adhesive part 52 is attached to the outer periphery of the main body 51. An adhesive layer made of an adhesive is provided on the surface of the adhesive part 52. This adhesive layer removes the foreign matter G fitted in the groove 49 of the removing roll 44 from the groove 49. The adhesive roll 50 rotates following the removal roll 44, and the adhesive roll 50 rotates in a rotation direction Y3 opposite to the rotation direction Y2 of the removal roll 44.

Next, the operation of the press device 40 will be described.
Now, the active material paste 12 is apply | coated to both the application surfaces 11a of the metal foil 11 by the coating apparatus 20, and the layer 12a of the active material paste 12 is formed on both surfaces of the metal foil 11. FIG. After the layer 12a of the active material paste 12 is dried by the drying device 30, the active material layer 12b is formed. Thereafter, the active material layer 12 b is pressed by the press device 40. At this time, a part of the active material may be peeled off from the active material layer 12 b and may adhere to the press roll 41 as foreign matter G.

  As shown in FIG. 5, the active material layer 12 b is pressed at a high pressure by a pair of press rolls 41. For this reason, the hard foreign matter G adhering to the press roll 41 bites into the press surface 43a while firmly adhering to the press surface 43a of the press roll 41 by the adhesive force of the binder.

  As shown in FIG. 7A, the foreign matter G adhering to the press surface 43 a of the press roll 41 is conveyed toward the removing roll 44 as the press roll 41 rotates. Then, the removing roll 44 also rotates following the press roll 41, and the protrusion 48 sequentially contacts the press surface 43 a of the press roll 41.

  As shown in FIGS. 6A, 6B, and 7B, the foreign matter G enters the groove 49 at the timing when the protrusion 48 of the removing roll 44 and the press roll 41 come into contact with each other. Then, the foreign matter G is peeled off from the press surface 43a by the protrusions 48 sandwiching the groove 49. At this time, the protrusion 48 is inclined with respect to the axial direction of the press roll 41 and does not contact the foreign object G in a state of extending in the horizontal direction, but contacts the foreign object G in an inclined state.

  As shown in FIG. 7C, the foreign matter G sandwiched in the groove 49 of the removal roll 44 is conveyed toward the adhesive roll 50 by the rotation of the removal roll 44 as it is. As the adhesive roll 50 rotates, the adhesive portion 52 sequentially contacts the protrusions 48 of the removal roll 44.

  As shown in FIG. 7D, at the timing when the foreign matter G sandwiched between the grooves 49 and the adhesive roll 50 come into contact, the foreign matter G adheres to the adhesive portion 52 and the foreign matter G is removed from the grooves 49. As a result, the foreign matter G is removed from the press roll 41 by the removing roll 44, and the foreign matter G is removed from the removing roll 44 by the adhesive roll 50. Therefore, the active material layer 12b is pressed by the smooth press surface 43a to which the foreign matter G is not attached.

According to the above embodiment, the following effects can be obtained.
(1) The press device 40 includes a removal roll 44 disposed to face the press surface 43 a of the press roll 41. The removal roll 44 includes a plurality of protrusions 48 and grooves 49 extending in the axial direction of the removal roll 44. And the foreign substance G adhering to the press surface 43a is pinched | interposed into the groove | channel 49, and the force of the direction peeled off from the press surface 43a with respect to the foreign substance G by the inner surface (groove formation surface) of the protrusion 48 which moves to a rotation direction, A force in the tilt direction can be applied to the press surface 43a, and the foreign matter G can be peeled off from the press surface 43a. Therefore, even if the foreign matter G is firmly attached to the press surface 43a by a high pressure via the adhesive force of the binder, the foreign matter G can be removed from the press surface 43a. Therefore, even the foreign matter G that cannot be removed by the adhesive roll that removes the foreign matter G only by the adhesive force can be removed.

  (2) The protrusion 48 of the removing roll 44 contacts the press surface 43a only at the timing closest to the press surface 43a of the press roll 41, and the protrusion 48 does not always contact the press surface 43a. For this reason, in the press part 43 of the press roll 41, the thermal expansion accompanying the contact of the protrusion 48 is hard to generate | occur | produce, and the thickness of the press part 43 can be stabilized. Therefore, the press roll 41 can pressurize the active material layer 12b to have a constant thickness.

  (3) The foreign matter G is pressed from the radial direction of the press roll 41 and bites into the press surface 43a. The protrusion 48 applies a force to the foreign matter G to peel the foreign matter G from a direction different from the direction in which the foreign matter G is pressed by the inner side surface (groove forming surface). For this reason, the foreign material G can be efficiently peeled off from the press surface 43a.

  (4) The longitudinal direction of the protrusion 48 and the groove 49 is inclined with respect to the axial direction of the removing roll 44. For this reason, the protrusion 48 applies a force in an inclined direction to the foreign matter G moving in the rotation direction. For this reason, compared with the case where the force in the rotation direction is applied to the foreign material G moving in the rotation direction, the foreign material G is easily peeled off.

  (5) The removing roll 44 is configured by mounting two types of muscle roll portions 46 in which the ridges 48 and the grooves 49 have opposite inclination directions on the roll body 45. For this reason, the inclination directions of the protrusions 48 and the grooves 49 are alternately reversed from one end of the removing roll 44 in the axial direction to the other end, and the removing roll 44 is directed in the axial direction acting on the press surface 43a. Can cancel out the thrust force.

  (6) The pressing device 40 includes an adhesive roll 50, and this adhesive roll 50 removes the foreign matter G sandwiched in the groove 49 of the removing roll 44. For this reason, the foreign matter G can be removed from the removal roll 44, and the contact with the press surface 43 a of the press roll 41 can be suppressed while the foreign matter G is attached to the removal roll 44.

  (7) The durometer hardness of the protrusion 48 was set to 5-30. For this reason, the protrusion 48 can be suitably elastically deformed, and the foreign object G can be sandwiched between the protrusions 48, and the sandwiched state can be easily maintained. For this reason, the foreign substance G is easily peeled off from the press surface 43 a by the removing roll 44.

In addition, you may change the said embodiment as follows.
As shown in FIG. 8, the removing roll 54 may include a roll body 55 and two muscle roll portions 56 attached to both ends of the roll body 55 in the axial direction. In this case, the longitudinal direction of the protrusion 58 and the groove 59 of each muscle roll portion 56 may extend along the axial direction of the removal roll 54 or may be inclined.

  In the press device 40, two removal rolls 54 are arranged side by side along the rotation direction of the press roll 41. At this time, in one of the removal rolls 54 arranged on the upstream side in the rotation direction of the press roll 41, the central portion in the axial direction of the roll body 55 is exposed from between the two removal rolls 54.

  In the rotation direction of the press roll 41, the other removal roll 54 disposed on the downstream side of the one removal roll 54 has a muscle roll portion 56 in the rotation direction corresponding to the exposed portion of the one removal roll 54. It is arranged in an overlapping state. Furthermore, corresponding to the press surface 43a that cannot be covered (opposed) by one of the removing rolls 54, the strip roll portion 56 of the other removing roll 54 is disposed so as to overlap in the rotation direction. That is, you may make it cover the whole axial direction of the press surface 43a with the four muscle roll parts 46 of the two removal rolls 54. FIG.

  In the embodiment, the removal roll 44 rotates following the press roll 41, but the peripheral speed in the rotation direction Y2 of the removal roll 44 needs to match the peripheral speed in the rotation direction Y1 of the press roll 41. Absent. For example, the removal roll 44 may be rotated at a peripheral speed different from that of the press roll 41 by a dedicated drive source. In this case, a force in the shearing direction can be further applied to the foreign matter G in the tangential direction of the press surface 43a. The adhesive roll 50 also rotates following the removal roll 44, but the peripheral speed in the rotational direction Y3 of the adhesive roll 50 does not need to match the peripheral speed in the rotational direction Y2 of the removal roll 44.

In the removing rolls 44 and 54, the longitudinal directions of the protrusions 48 and 58 and the grooves 49 and 59 may extend along the axial direction of the roll bodies 45 and 55.
In the removing rolls 44 and 54, the protrusions 48 and 58 are not essential. In the muscle roll portions 46 and 56 of the embodiment, the protrusions 48 and 58 and the grooves 49 and 59 are formed in the surface layer made of an elastic body. For example, a notch-shaped groove is formed in the surface layer made of an elastic body. However, when it comes into contact with the foreign matter G forming a protrusion on the press roll 41, a notch (groove) may be opened and the foreign matter G may be held.

The removal roll 44 of the embodiment may have a configuration in which one muscle roll portion 46 is attached to the entire outer peripheral surface of the roll main body 45.
The muscle roll portions 46 and 56 may not be made of rubber but may be made of resin having elasticity.

  As shown in FIG. 9, an auxiliary removal roller 57 may be disposed downstream of the removal rolls 44 and 54 in the rotation direction of the press roll 41. The auxiliary removal roller 57 has an adhesive layer on the peripheral surface. Then, the foreign matter G that has failed to be peeled off by the removing roll 44 may be attached to the auxiliary removing roller 57 to remove the foreign matter G from the press surface 43a.

  In this case, when the foreign matter G is to be peeled off by the removing roll 44, a force to be peeled off is applied to the foreign matter G so that the foreign matter G is easily peeled off from the press surface 43a. For this reason, the foreign matter G can be removed from the press surface 43 a by the adhesive force of the auxiliary removal roller 57.

In addition, the press apparatus 40 of this form may be provided with the adhesion roll 50 of embodiment corresponding to the roll 44 for removal.
In the removal roll 44 of the embodiment, in the plurality of muscle roll portions 46 arranged in parallel in the axial direction of the roll main body 45, all the inclination directions of the ridges 48 and the grooves 49 may be the same.

○ The adhesive roll 50 may be omitted.
In the embodiment, the active material paste 12 is applied to both surfaces (application surface 11a) of the metal foil 11, but when the active material paste 12 is applied to one surface of the metal foil 11, the press device 40 is applied. May be.

  The base sheet is not limited to the metal foil 11 as long as it is in the form of a sheet and can be coated with the active material paste 12. For example, a woven or net-like substrate sheet may be used.

  The press device 40 is embodied as one that pressurizes the active material layer 12b applied to the metal foil 11 in order to manufacture an electrode, but is not limited thereto. The press device 40 may be applied when pressure is applied to the layer on the base material sheet on which an adhesive, paint, or the like is used as the paste-like material.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) A press device provided with an adhesive roll for removing the foreign matter from the removal roll.
(B) A press device provided with an auxiliary removal roller on the downstream side of the removal roll in the rotation direction of the press roll.

  G ... Foreign matter, 11 ... Metal foil as substrate sheet, 12b ... Active material layer, 40 ... Press device, 41 ... Press roll, 43a ... Press surface, 44, 54 ... Removal roll, 46, 56 ... Muscle roll Part 47: base part as surface layer, 48, 58 ... protrusion, 49, 59 ... groove.

Claims (4)

A press device that pressurizes a layer formed on at least one surface of a long substrate sheet with a press roll from a direction intersecting the surface of the substrate sheet,
Having a removal roll for removing foreign matter adhering to the press surface of the press roll;
The removal roll is disposed opposite to the press surface of the press roll,
The removing roll is formed of an elastic surface layer covering the outer peripheral surface of the removing roll, and is formed on the surface layer. The removing roll extends in the axial direction of the removing roll, and plural in the circumferential direction of the removing roll. A pressing device comprising grooves arranged side by side.   The press device according to claim 1, wherein the groove is formed with a constant width, and a protrusion is disposed adjacent to the groove.   The press device according to claim 2, wherein a longitudinal direction of the groove is inclined with respect to an axial direction of the removing roll.   The removal roll includes a muscle roll portion provided with the groove, and a plurality of muscle roll portions are arranged in parallel in the axial direction of the removal roll, and the inclination direction of the groove in the axial direction of the removal roll The press apparatus according to any one of claims 1 to 3, wherein are alternately reversed.