JPH11260356A - Press equipment - Google Patents

Abstract

(57) Abstract: A pressing material having a uniform thickness is formed over the entire area in the width direction by correcting axial bending generated in a pressure roller. SOLUTION: A first pressure roller 10 which can freely contact and separate from each other.
And a second pressure roller 11. A first bearing portion 13 that supports the roller support shaft 12 of the first pressure roller 10;
A second bearing portion 14 that supports the end of the roller support shaft 12,
A first support mechanism 15 that supports the first bearing portion 13. A third bearing portion 17 that supports the roller support shaft 16 of the second pressure roller 11, a fourth bearing portion 18 that supports the end of the roller support shaft 16, and a third bearing portion 17. And a second support mechanism 19 for supporting. The second bearing part 14 and the fourth
A deflection correction mechanism 20 for correcting in advance the axial deflection of the first and second pressure rollers 10 and 11 that occurs when the material to be pressed 2 is pressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a press apparatus for forming a predetermined thickness by subjecting a material to be pressed, such as a plate-like member or a sheet-like member, to be conveyed between a pair of rolling rollers. For example, the present invention relates to a press device suitable for use in a hot press device used in a manufacturing process of a strip electrode material for a lithium ion battery.

[0002]

2. Description of the Related Art A secondary battery such as a lithium ion battery is used as a DC power supply in various electronic devices, notebook personal computers, cordless telephones, and the like. As is well known, a lithium ion battery is configured by using metallic lithium for a negative electrode and using a mixture of various electrode materials and a conductive material for a positive electrode. Lithium-ion batteries are cylindrical,
It is classified into flat type (coin type), pin type or flat type (square type, paper type) and the like. Lithium-ion secondary batteries are, for example, spirally winding an electrode material formed by applying an electrode active material to a strip-shaped metal foil current collector through a severator, sealing this in a cylindrical container, and forming a positive electrode terminal. And a negative electrode terminal. In a lithium ion secondary battery, a large current can be obtained because the electrode material is spirally wound to increase the reaction area.

[0003] In order to improve the performance of the battery, it is necessary for the electrode material to have the particles of the electrode active material firmly fixed to the metal foil current collector by the binder and dispersed at a high density in the binder. is there. For this reason, the electrode material is formed by subjecting the electrode material to a hot press process of heating and rolling by the hot press device 100 shown in FIGS. In the electrode material, the particles of the electrode active material are fixed at high density and firmly in the binder by the hot pressing.

[0004] A conventional press apparatus 100 is shown in Figs.
As shown in FIG. 1, a first pressure roller 101 and a second pressure roller 102 which are supported so as to be able to freely contact with and separate from each other and constitute a pressure space 104 in which a belt-shaped electrode material 103 is conveyed are provided. I have. The pressing device 100 rolls the electrode material 103 by sandwiching and transporting the electrode material 103 conveyed in the rolling space 104 by the first roller 101 and the second roller 102. Processing is performed to form a predetermined thickness. First roller 1
01 is provided with a heater for heating the electrode material 103.

[0005] The press apparatus 100 is provided with a first bearing 106 comprising a pair of left and right bearings 106a and 106b disposed on a base 105, and a support shaft 10 of the first pressure roller 101.
7 are rotatably supported at both ends. Press device 100
Is supported by a second bearing portion 108 including a pair of left and right bearings 108 a and 108 b disposed on a stand (not shown) provided on a base 105.
Are rotatably supported at both ends. Press device 100
Is a second bearing 1 that supports the second pressure roller 102.
Reference numeral 08 is vertically movable with respect to the stand, that is, is freely movable toward and away from the first bearing 106 supporting the first pressure roller 101. The press device 100 includes first and second bearings 108a and 108b of the second bearing portion 108, respectively.
An adjustment mechanism 110 (110a, 110b) for adjusting the facing distance between the pressure roller 101 and the second pressure roller 102, that is, the height dimension of the pressure space 104 is additionally provided.

[0006] The press apparatus 100 configured as described above
The second pressure roller 102 is adjusted and moved with respect to the first pressure roller 101 by the adjustment mechanism 110, and the pressure space 104 is set to a predetermined height. The press device 100 is connected to the electrode material 103 via a supply mechanism (not shown).
Is transported in the compaction space 104 and the electrode material 10
3 is a first roller 101 and a second roller 102
And transported. The electrode material 103 is heated by this and is subjected to a pressing process to a predetermined thickness. The electrode material 103 is configured such that the electrode active material is firmly fixed to the metal foil current collector in a higher density and uniform state by the pressing process, thereby forming an electrode material.
The electrode material is conveyed to the next step and subjected to a step of, for example, spirally winding or laminating.

[0007]

By the way, in the above-described conventional press apparatus 100, the first pressure roller 1
01 and the second pressure roller 102 are adjusted by the adjusting mechanism 110 so that the opposing interval is adjusted over the entire area in the width direction, so that the pressure roller space 104 is set to a predetermined height. The compaction space portion 104 has the same height dimension over the entire area in the width direction. Press device 100
Means that the reaction force from the electrode material 103 during the pressing process is the first
9 acts upward in FIG. 9 and acts downward on the second pressure roller 102 in FIG.

[0008] In the press device 100, the change in the rolling load conditions causes the first pressure roller 101 to bend upward and the second pressure roller 10 to flex.
2 bends downward, causing an axial bending phenomenon. This bending phenomenon is caused by the fact that the spindles 107 and 109
As shown in FIG. 9, the first pressure roller 101 and the second
The height dimension of the rolling space 104 is increased at the axial center of the rolling roller 102.

Therefore, as shown in FIG. 1, the pressing device 100 presses the electrode material 103 such that the thickness t2 at both sides is smaller than the thickness t1 at the center in the width direction. And an electrode material having a non-uniform thickness is formed. Further, the pressing device 100 forms an electrode material having an uneven density of the electrode active material with respect to the metal foil current collector. Such an electrode material causes a problem of deteriorating the battery quality because it forms a uniform layer structure when being spirally wound or laminated in the next step, for example.

In order to solve such a problem, the conventional press apparatus 100 optimizes, for example, the temperature condition applied to the electrode material 103 and sets the rolling load condition on the electrode material 103 low to thereby reduce the first rolling. Pressure roller 10
An electrode material having a uniform thickness is formed by suppressing a bending phenomenon occurring in the first or second pressure roller 102. However, such an electrode material has a problem that the performance of the battery cannot be improved because it is difficult to form an electrode active material layer having a sufficient density with respect to the metal foil current collector.

In the press apparatus 100, for example, it is considered that the electrode material 103 is subjected to a plurality of press treatments under different rolling load conditions. Since the number of setup steps such as adjusting the height dimension of the compaction space portion 104 by re-operation is increased, the productivity is significantly reduced, which is not practical. In the lithium ion battery, it is necessary to perform a pressing process on the electrode material 103 under a higher rolling load condition by the press device 100 in order to improve the performance.

Accordingly, the present invention provides a pressed material having a uniform thickness over the entire width direction by correcting in advance the bending generated in the compaction roller even when a press process is performed under a high rolling load condition. It has been proposed for the purpose of providing a press device in which is formed.

[0013]

According to the present invention, there is provided a press apparatus comprising: a first roller and a second roller; Pressing is performed with the material to be pressed interposed therebetween.
The press device includes a first bearing portion disposed on both sides of the first pressure roller and rotatably supporting the roller support shaft, and a roller support shaft disposed on both sides of the second pressure roller. A second bearing portion rotatably supported, and a third bearing portion disposed outside the first bearing portion and rotatably supporting an end of a roller support shaft of the first pressure roller. And a fourth bearing portion disposed outside the second bearing portion and rotatably supporting an end of a roller support shaft of the second pressure roller. The press device is configured to support at least one of the first bearing portion and the second bearing portion such that the first bearing portion and the second bearing portion can be freely moved toward and away from the other bearing portion. A first support mechanism for setting an interval between the first and second bearings, and a roller support shaft of the first pressure roller, which is disposed between the third bearing and the fourth bearing. And a deflection correction mechanism for urging the roller support shaft of the pressure roller in a direction in which the first roller and the second roller are separated from each other.

According to the press apparatus of the present invention having the above-described configuration, when the first pressing roller and the second pressing roller sandwich the material to be pressed and perform the pressing process, the first pressing roller and the second pressing roller perform the pressing process. Since the bending in the axial direction generated in the first roller and the second roller is corrected in advance by the deflection correcting mechanism, the material to be pressed is rolled with a uniform rolling pressure over the entire area in the width direction. Therefore, the press device forms a pressed material having a uniform thickness and a stable quality. Further, the press device appropriately adjusts the rolling pressure of the first roller and the second roller by appropriately setting and operating the deflection correcting mechanism, and the reaction force of the rolling pressure by the deflection correcting mechanism. As a result, the axial deflection between the first and second roller units is appropriately corrected, so that a high-precision press material having a desired thickness is formed.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. The press apparatus 1 shown in the drawings as an embodiment of the present invention performs hot press processing on a sheet-like electrode material 2 which is installed during a manufacturing process of a lithium battery and continuously supplied from a supply unit (not shown). Accordingly, the electrode active material is fixed at a high density and firmly to the metal foil current collector to form an electrode material having a certain thickness.

As shown in FIGS. 1 to 3, the hot press apparatus 1 includes a base 3 and a pair of right and left fixed to each other on the base 3 by fixing brackets 4 (4a to 4d) facing each other in parallel. Side frame 5 (5a, 5b)
And In the following description, terms such as front and rear, up and down, and left and right are used with reference to FIG. In addition, members composed of a plurality of pairs or pairs that are equivalently configured, such as the side frame 5, are described first as described above, and thereafter, unless otherwise specifically used, they are denoted by representative symbols and individual members are attached. The description is omitted.

As shown in FIGS. 1 and 3, the hot press apparatus 1 includes a roller driving section 6 which will be described in detail in one area of the base 3 and a detail supported by the side frame 5 in the other area. The rolling unit 7 is configured by disposing each member described later. The hot press device 1 is supplied with an electrode material 2 that travels along a path indicated by an arrow in FIG. As shown in FIG. 3, the electrode material 2 is provided with guide mechanisms 7b and 7c, which are disposed with the rolling portion 7 therebetween and omits details.
The hot press process is performed to a predetermined thickness when passing through the rolling space 7 a formed in the rolling portion 7. The electrode material 2 is a hot press 1
And supplied to the next step (not shown).

Although not described in detail, the roller drive unit 6 reduces the rotational output of the drive motor 8 and transmits the rotational output of the drive motor 8 to the first roller 10 and the second roller 11. It comprises a reduction gear mechanism 9 and the like. Roller drive 6
In FIG. 2, a branch gear mechanism for rotating the first pressure roller 10 in the clockwise direction and rotating the second pressure roller 11 in the counterclockwise direction in FIG. Is provided. The roller driving unit 6 is provided with the first
The second pressure roller 11 and the second pressure roller 11 are driven to rotate at a constant speed.

The rolling unit 7 includes the side frame 5 described above.
The first and second compaction rollers 10 and 1 are vertically supported in parallel with each other as shown in FIG. 1 and form a compaction space 7a between opposed outer peripheral surfaces.
1 is provided. The rolling unit 7 includes a pair of left and right first bearings 13 (13a, 13b) that rotatably support the roller support shaft 12 of the first rolling roller 10, and a pair of left and right second bearings. A pair of left and right first support mechanisms 15 (15a, 15b) that adjustably support the height position of the portion 14 (14a, 14b) and the first pressure roller 10 is provided.

The rolling portion 7 includes a pair of left and right third bearing portions 17 (17a, 17b) for rotatably supporting the roller support shaft 16 of the second rolling roller 11, and a pair of left and right fourth bearing portions 17a, 17b. A pair of left and right second supports that adjustably support the height positions of the bearing portions 18 (18a, 18b) and the second pressure roller 11.
And a supporting mechanism 19 (19a, 19b). Further, the rolling bearing 7 includes a second bearing 14 and a fourth bearing 1.
8 is provided with a pair of left and right and front and rear hydraulic cylinder devices 20a to 20d. The hydraulic cylinder devices 20a to 20d will be described in detail later.
4 and 4 in cooperation with the fourth bearing portion 18, deflection correction for correcting axial deflection generated in the first pressure roller 10 and the second pressure roller 11 when hot pressing the electrode material 2. The mechanism 20 is configured.

The side frame 5 has a sufficient mechanical strength so as not to be deformed when the electrode material 2 is subjected to hot pressing, and is erected on the base 3 by the fixing bracket 4 as described above. Have been. Side frame 5
As shown in FIGS. 1 and 3, the roller 7 is held at a predetermined opposing interval by a distance rod 21 bridged over the upper end thereof to constitute the above-described rolling unit 7. As shown in FIG. 2, each side frame 5 has a substantially gate-shape by being hollowed out in the height direction. The side frame 5 is formed as a bearing assembly space portion 22 in which the hollowed portion is configured to assemble each bearing portion movably in the vertical direction.

The first pressure roller 10 has sufficient mechanical rigidity so that no deformation or the like occurs when the electrode material 2 is rolled with a metal material, and has a width slightly smaller than the facing distance of the side frames 5. And formed. The first pressure roller 10 has a roller support shaft 12 penetrated on both sides thereof and rotates integrally therewith. Roller support shaft 12
A large diameter portion 12a and a small diameter portion 12b are formed at both ends thereof, and are rotatably supported by a first bearing portion 13 and a second bearing portion 14 as described later. Further, the first pressure roller 10 has a heater 10a incorporated therein and is heated to a predetermined temperature. The first roller 10 heats the electrode material 2 conveyed through the roller 7.

As shown in FIGS. 1 and 2, the first bearing portions 13 are located and assembled in the bearing assembly space portions 22 of the side frames 5, respectively. The first bearing 13 is
The large-diameter portion 12a of the roller support shaft 12 is rotatably supported, and is supported so as to be vertically adjustable via a first support mechanism 15 as will be described in detail later. First
Although the details of the bearing portion 13 are omitted, a bearing box and
It is composed of a bearing metal and a ball bearing provided in these bearing boxes. The first bearing 13 is
The small-diameter portions 12b of the roller support shafts 12 are exposed to the sides, and are located inside the second bearing portions 14, respectively.

As shown in FIGS. 1 and 4, the second bearing portion 14 passes through the first bearing portion 13 and
The small diameter portions 12b at both ends of the roller support shaft 12 protruding from the bearing assembly space 22 are rotatably supported. The second bearing portion 14 includes a bearing member such as a bearing metal and a ball bearing, though not described in detail, and also includes a receiving seat member 23 (23a, 23b). As shown in FIGS. 4 and 5, the receiving seat member 23 has cylindrical base portions 24 and receiving portions 25 (25 a, 25 b) formed integrally on both sides of the outer peripheral portion of the base portions 24.
Consists of The receiving portion 25 is, as shown in FIG.
4 and is bent in the horizontal direction at the upper end to form mounting portions 26 (26a, 26b). The mounting portion 26 includes a hydraulic cylinder device 20a as described later.
To 20d are respectively attached.

The first support mechanism 15 includes a side frame 5
And a pair of left and right hydraulic cylinder devices respectively provided in the bearing assembly space portion 22. First support mechanism 15
As shown in FIG. 2, each cylinder body is attached to the side frame 5, and the tip of each piston member is connected to the bottom surface of the bearing box of the first bearing 13. The first support mechanism 15 supports the lower part of the first bearing unit 13 with such a configuration. When the first support mechanism 15 is driven, the piston member operates to move the first bearing 13 in the vertical direction along the side frame 5. Therefore, in the hot press device 1, since the first pressure roller 10 is adjusted and moved in the vertical direction by the first support mechanism 15, as described above, the opposing interval with the second pressure roller 11, that is, The height dimension of the rolling space 7a is adjusted.

Similarly to the above-described first roller 10, the second roller 11 has sufficient mechanical rigidity to prevent deformation or the like when the electrode material 2 is rolled with a metal material. And has a width slightly smaller than the opposing interval of the side frames 5. Second roller 11
Is disposed above the first pressure roller 10 in the pressure roller 7 and has a roller support shaft 16 penetrated on both sides thereof and rotates integrally therewith. Roller spindle 1
6 has a large-diameter portion 16a and a small-diameter portion 16b formed at both ends thereof, and is rotatable by a third bearing portion 17 (17a, 17b) and a fourth bearing portion 18 (18a, 18b). It is pivoted on. The second pressure roller 11 also has a heater 11a incorporated therein, and is heated to a predetermined temperature. The second roller 11 heats the electrode material 2 conveyed by the roller 7 by the second roller 10.

The third bearing portion 17 is a first bearing portion 1 that supports the roller support shaft 12 of the first pressure roller 10 described above.
1 and 2, and is assembled above the bearing assembly space 22 between the side frames 5, as shown in FIGS. The third bearing portion 17 rotatably supports the large-diameter portion 16a of the roller support shaft 16, and is supported by the side frame 5 via a second support mechanism 19 as described in detail later. Third
Although the details of the bearing part 17 are omitted,
a, 17b, bearing metals and ball bearings provided in the bearing boxes 17a, 17b. The third bearing portions 17 are each provided with a roller support shaft 16.
The small-diameter portion 16b is exposed to the side, and is located inside the fourth bearing portion 18, respectively.

The fourth bearing 18 penetrates through the third bearing 17 as shown in FIGS.
The small diameter portions 16b at both ends of the roller support shaft 16 protruding from the bearing assembly space 22 are rotatably supported. Although not described in detail, the fourth bearing portion 18 includes a bearing member such as a bearing metal and a ball bearing, and also includes a receiving seat member 28 (28a, 28b). The receiving seat 28 has a vertically symmetrical shape with respect to the receiving seat member 23 on the side of the first pressure roller 10 described above, and as shown in FIGS. 4 and 5, a cylindrical base 29 and an outer periphery of the base 29. Receiving portions 30 (3) integrally formed on both sides of the
0a, 30b). As shown in FIG. 5, the receiving portion 30 has a height approximately half of that of the base portion 29, and is bent at the lower end in the horizontal direction to form mounting portions 31 (31a, 31b). The hydraulic cylinder devices 20a to 20d are respectively attached to the attachment portions 31 as described later.

Although not described in detail, the second support mechanism 19 is constituted by a pair of right and left mounting brackets fixed to the bearing mounting space 22 of the side frame 5, respectively. As shown in FIG. 2, the second support mechanism 19 is coupled to the bottom surfaces of the bearing boxes 17a and 17b of the third bearing portion 17 to define the height position of the third bearing portion 17. ing. Therefore, the hot press device 1 moves along the bearing assembly space portion 22 of the side frame 5 with reference to the second pressure roller 11 supported by the third bearing portion 17 whose height position is defined. The first bearing 13 is adjusted and moved in the vertical direction, and the height position of the first pressure roller 10 supported by the first bearing 13 is set.

Of course, in the hot press apparatus 1, the third bearing portion 17 may be vertically adjustable along the side frame 5 by forming the second support mechanism 19 by a hydraulic press. In this case, the hot press device 1 may also support the first pressure roller 10 with the above-described configuration. However, in order to maintain a mechanical reference for defining the height dimension of the pressure roller space 7a, the first pressure roller 10 may be supported. 1 roller 1
It is preferable to fix the first bearing portion 13 supporting the first frame 0 to the side frame 5.

Each of the hydraulic cylinder devices 20a to 20d is composed of a cylinder body 32 and a piston member 33. As shown in FIG. 23 mounting part 2
Fixed to 6. In addition, the hydraulic cylinder devices 20a to 2
In 0d, the piston member 33 is fixed to the mounting portion 26 of the receiving seat member 28 on the second pressure roller 11 side. Thus, the hot press device 1 includes the second bearing portion 14 of the first pressure roller 10 and the fourth bearing portion 18 of the second pressure roller 11.
And a deflection correction mechanism 20 composed of hydraulic cylinder devices 20a to 20d.

In the hot press device 1, each of the hydraulic cylinder devices 20a to 20d is driven and its piston member 33 is moved.
Slides in the cylinder body 32,
An acting force is applied to the third bearing part 17 and the fourth bearing part 18 in a direction of separating them from each other. Therefore, in the hot press device 1, the deflection correcting mechanism 20 acts in a direction in which the roller support shaft 12 of the first pressure roller 10 and the roller support shaft 16 of the second pressure roller 11 are separated from each other at both ends. Force is loaded. On the other hand, the hot press 1
The third bearing part 17 and the fourth bearing part 18 are positioned and fixed in the height direction by the first support mechanism 15 and the second support mechanism 19. Therefore, the hot press apparatus 1 can be configured such that even when the deflection correcting mechanism 20 is set and operated, the initial height dimension of the rolling space 7a formed by the first and second rolling rollers 10 and 11 can be improved. The setting value does not change.

The operation of the hot press apparatus 1 having the above-described configuration will be described with reference to FIGS. 6 and 7. In FIGS. 6 and 7, the third bearing 17 that supports the second pressure roller 11 also has a second support mechanism 19 formed by a hydraulic press device. Therefore, the hot press device 1 is configured such that the first pressure roller 10 and the second pressure roller 11 can freely contact and separate from each other. Of course, the third bearing portion 17 is set to a predetermined height position by the second support mechanism 19 and then fixed to be set at a mechanical reference position.

The hot press device 1 includes a first support mechanism 1
By setting the amount of operation of the hydraulic press device that constitutes 5, the height dimension of the rolling space 7 a formed with the second pressure roller 11 is defined. The height of the compression space 7a depends on the thickness of the electrode material 2, the material of the metal foil current collector and the electrode active material applied thereto, the heating temperature, and the like. On the other hand, the first pressure roller 1
0 is a predetermined thickness dimension of the electrode material formed by performing a hot pressing process on the electrode material 2 with a predetermined pressing pressure by the approaching operation.

In the hot press apparatus 1, the bending phenomenon between the first roller 10 and the second roller 11 is corrected in advance by a bending correction mechanism 20. That is, as shown in FIG. 6, the hot press device 1 includes the hydraulic press devices 20a to 20a constituting the deflection correcting mechanism 20.
By driving d, the second bearing portion 14 that supports the roller support shaft 12 of the first pressure roller 10 and the fourth bearing 14 that supports the roller support shaft 16 of the second pressure roller 11. An acting force is applied in a direction to separate the bearing portion 18 from each other. When both ends of the roller support shaft 12 are pressed downward by the deflection correction mechanism 20, an upward reaction force is generated at the center in the axial direction. On the other hand, the roller support shaft 16 has
When both ends are pressed upward by the deflection correction mechanism 20, a downward reaction force is generated at the axial center.

In the hot press apparatus 1, when the electrode material 2 is conveyed to the rolling space 7a, as shown in FIG. 7, the first support mechanism 15 operates to move the first rolling roller 10 upward. Then, the electrode material 2 is sandwiched between the second pressure roller 11 and the hot pressing process is performed. During the hot pressing of the electrode material 2, the hot pressing device 1 causes the first pressure roller 10 to bend upward and
Of the pressure roller 11 bends downward, causing an axial bending phenomenon. The hot press device 1 includes a first pressure roller 10
Of the roller support shaft 12 is regulated at both ends thereof by the first bearing portion 13 and the roller support shaft 16 of the second pressure roller 11 is regulated at both ends thereof by the third bearing portion 17. Due to this bending phenomenon, the first pressure roller 10 and the second pressure roller 11 are separated from each other at the central portion in the axial direction.

On the other hand, as described above, the hot press apparatus 1 has a load acting on the first roller 10 and the second roller 11 to suppress the axial bending phenomenon caused by the bending correction mechanism 20 as described above. Have been. Therefore, the hot press device 1 is provided with the first pressure roller 10 as shown in FIG.
The second pressure roller 11 and the second pressure roller 11 form a uniform pressure space 7 a over the entire area in the axial direction, and perform hot stamping of the electrode material 2. Thus, the pressing device 1 forms an electrode material in which the thickness T1 at the center in the width direction is equal to the thickness T2 at the side end.

The electrode material is subjected to hot stamping with a predetermined press pressure over the entire region in the width direction as described above, so that the electrode active material applied to the metal foil current collector is applied. Are firmly fixed by the binder, and are formed in the binder with high density and uniform dispersion. The electrode material is formed to have a uniform thickness. Therefore, the electrode material forms a lithium ion battery with stable quality and high accuracy.

The hot pressing apparatus 1 shown in the above-described embodiment performs a hot pressing process on the sheet-like electrode material 2 continuously supplied from the supply unit, so that the metal foil current collector can be removed. Is a hot press device in which the electrode active material is fixed densely and firmly to form an electrode material having a certain thickness dimension, but the present invention is not limited to such a hot press device, The present invention is also applied to a press device for pressing an appropriate material to be pressed into a predetermined thickness.

In the hot press apparatus 1, the electrode material 2 having a predetermined thickness is hot-pressed to form an electrode material having a predetermined thickness.
It is also possible to form a material to be pressed having a non-uniform thickness to a uniform thickness. Further, according to the press device according to the present invention, the first pressure roller 10 and the second pressure roller 11 can be mutually adjusted, and the press pressure is intentionally adjusted by the deflection correcting mechanism. Therefore, a pressed material having a partially changed thickness dimension is also manufactured.

The deflection correcting mechanism 20 is constituted by the hydraulic press devices 20a to 20d disposed between the second bearing portion 14 and the fourth bearing portion 18, respectively. However, the present invention is not limited to this configuration. There is no. The deflection correcting mechanism 20 may be constituted by, for example, a rack member which is moved with respect to the support frame by a motor. In short, the deflection correcting mechanism 20 exerts an acting force in a direction for separating the second bearing portion 14 and the fourth bearing portion 18. Any mechanism can be used as long as it is a mechanism for generating.

[0042]

As described above in detail, according to the press apparatus according to the present invention, the material to be pressed is sandwiched between the first and second rolling rollers that move toward and away from each other. Since the bending in the axial direction that occurs during the press processing is configured to be corrected in advance by the bending correction mechanism, the first pressed roller and the second pressed roller allow the material to be pressed to cover the entire area in the width direction. At a uniform rolling pressure to form a pressed material having a uniform thickness and a stable quality. Further, in the press device, by appropriately setting and operating the deflection correcting mechanism, the rolling pressure by the first roller and the second rolling roller is appropriately adjusted, and the deflection correcting mechanism generates a reaction force of the rolling pressure. Since the resulting bending in the axial direction between the first roller and the second roller is corrected, a pressed material having a desired thickness is formed with high accuracy.

[Brief description of the drawings]

FIG. 1 is a front view of a hot press apparatus for an electrode material shown as a first embodiment of a press apparatus according to the present invention.

FIG. 2 is a side view of the hot press apparatus.

FIG. 3 is a plan view of the hot press device.

FIG. 4 is a partially cutaway front view showing the details of a bearing portion of the hot press apparatus.

FIG. 5 is a main part side view showing details of a deflection correction mechanism of the hot press apparatus.

FIG. 6 is a schematic diagram illustrating a hot press process of an electrode material by the hot press device, and shows a setting state of a deflection correction mechanism.

FIG. 7 is a schematic diagram illustrating a hot press process of an electrode material by the hot press device, and shows a hot press state.

FIG. 8 is a front view of a main part schematically illustrating a conventional hot press apparatus.

FIG. 9 is a front view of a main portion schematically illustrating a state of the electrode material during hot press processing by the hot press device.

[Explanation of symbols]

1 hot press machine (press machine), 2 electrode materials,
3 base, 5 side frame, 6 roller drive,
Reference Signs List 7 compaction part, 7a compaction space, 10 first compaction roller, 11 second compaction roller, 12 roller support shaft of first compaction roller, 13 first bearing portion, 14 second compaction roller Bearing portion, 15 first support mechanism, 16 roller support shaft of second compaction roller, 17 third bearing portion, 18 fourth bearing portion, 19 second support mechanism, 20 deflection correction mechanism, 20a
~ 20d Hydraulic press device, 23 receiving seat member, 28 receiving seat member

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takashi Aoya 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation

Claims (2)

[Claims] 1. A press apparatus for performing a press process by sandwiching a material to be pressed between outer peripheral surfaces of a first roller and a second roller that are supported opposite to each other so as to be able to freely contact and separate from each other. A first bearing portion disposed on both sides of the first pressure roller to rotatably support the roller support shaft; and a first bearing portion disposed on both sides of the second pressure roller to rotatably support the roller support shaft. A second bearing portion for supporting; a third bearing portion disposed outside the first bearing portion and rotatably supporting an end of a roller support shaft of the first pressure roller; A fourth bearing portion that is disposed outside the second bearing portion and rotatably supports an end of a roller support shaft of the second pressure roller, the first bearing portion, By supporting at least one bearing portion of the second bearing portion so as to be able to freely contact and separate from the other bearing portion, A first support mechanism for setting an opposing distance between the first roller and the second roller; and a first support mechanism disposed between the third bearing and the fourth bearing. Urges the roller shaft of the first roller and the roller shaft of the second roller in a direction in which the first roller and the second roller are separated from each other. A deflection compensating mechanism, wherein when the pressed material is pressed by the first roller and the second roller, the first roller and the second roller are flexed by the deflection compensating mechanism. A press device characterized in that the amount of deflection in the axial direction generated with the pressure roller is corrected in advance. 2. A heater is provided on at least one of the first roller and the second roller, and a heater is provided between the first roller and the second roller. 2. The press apparatus according to claim 1, wherein a hot press process is performed for heating and rolling the strip-shaped electrode material obtained by applying the electrode active material to the conveyed metal foil current collector.