JP2013240822A - Roll press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll press device easy in fine adjustment of a gap length between peripheral surfaces of one pair of rollers, simple in configuration and small in size.SOLUTION: A guide member 6a allows movement of one of first and second support members 4, 5 respectively supporting first and second rollers 2, 3 relative to the other in a first direction other than a direction of compression by the first and second rollers 2, 3 and restricts its movement in a second direction orthogonal to the first direction. Then, a gap adjustment device 7 moves one of the first and second support members 4, 5 to adjust a gap length between peripheral surfaces of the first and second rollers 2, 3. Owing to a structure in which a direction of gap adjustment is different from a direction of press loading, fine adjustment of the gap length between the peripheral surfaces of the heavy-weighted first and second rollers 2, 3 is facilitated and an object to be compressed can be pressed to have a highly accurate thickness.

Description

  The present invention relates to a roll press apparatus that includes a pair of rollers and presses a material to be compressed through a gap between the peripheral surfaces of the rollers.

  For example, JP 2000-133251 A (Patent Document 1) describes a roll press device for pressing an electrode material. The roll press apparatus described in Patent Document 1 includes a pair of rollers arranged vertically and a frame that supports the rollers so as to be rotatable around an axis. The lower roller has a structure fixed to the frame, and the upper roller has a structure that can slide up and down by a hydraulic cylinder along a guide provided on the frame. According to the roll press apparatus having such a structure, it is possible to apply pressure in the direction of reducing the thickness of the electrode material within the range of the preload by the hydraulic cylinder.

JP 2000-133251 A

  Generally, in a roll press apparatus for pressing an electrode material, it is necessary to press an electrode material of several tens of μm with an accuracy of ± several μm with an applied pressure of several tens of TN. However, in the above-described roll press apparatus described in Patent Document 1, the upper roller is slid in the vertical direction by the hydraulic cylinder to adjust the gap length between the peripheral surfaces of the pair of rollers, and the pressurization by the hydraulic cylinder is performed. Within this range, a pressure is applied in the direction of reducing the thickness of the electrode material. That is, since the gap adjustment direction and the press load direction are the same direction, it is difficult to finely adjust the gap length between the peripheral surfaces of a pair of heavy rollers. In addition, since a pump, piping and the like for operating the hydraulic cylinder are required, the configuration of the roll press apparatus becomes complicated. Further, since the structure applies pressure within the range of pressure applied by the hydraulic cylinder, the stress path (path where the force is applied) is a long path from the hydraulic cylinder through the frame to the first and second rollers. Thus, the roll press apparatus tends to be enlarged.

  The present invention has been made in view of such circumstances, and it is easy to finely adjust the gap length between the peripheral surfaces of a pair of rollers, and an object of the present invention is to provide a small roll press device with a simple configuration. And

  (Claim 1) In the roll press apparatus of the present invention, the first and second rollers arranged in parallel and in parallel with a gap between the peripheral surfaces, and the first and second rollers as shafts. First and second support members that are rotatably supported around each other, and one of the first and second support members is moved with respect to the other in a first direction other than the compression direction by the first and second rollers. A guide member that permits and restricts movement in a second direction orthogonal to the first direction, and moves the first and second support members by moving one of the first and second support members in an allowable direction by the guide member. A gap adjusting device that adjusts the gap length between the peripheral surfaces of the rollers, and a driving device that drives the first and second rollers to rotate and presses the object to be compressed that is passed through the gap.

  (Claim 2) The allowable direction of the guide member may be a feeding direction of the object to be compressed.

  (Claim 3) The gap adjusting device moves one of the first and second support members within a range not including the case where the gap length between the peripheral surfaces of the first and second rollers is in an initial state. By doing so, the gap length may be adjusted.

  (Claim 1) The guide member moves in the first direction other than the compression direction by the first and second rollers with respect to one of the first and second support members that respectively support the first and second rollers. Allow and restrict movement in the second direction orthogonal to the first direction. The gap adjusting device adjusts the gap length between the peripheral surfaces of the first and second rollers by moving one of the first and second support members. For example, when the first and second rollers compress in the vertical direction (second direction) and the first support member moves in the horizontal direction (first direction) with respect to the second support member, the first and second at that time The gap length between the circumferential surfaces of the rollers is the movement distance of the first support member (first roller), the initial gap length between the circumferential surfaces of the first and second rollers, and the radii of the first and second rollers. Can be represented by a mathematical formula. Then, when the movement distance of the first support member (first roller) is represented by a graph with the horizontal axis representing the movement distance between the circumferential surfaces of the first and second rollers, the circumferential surface of the first and second rollers. The gap length therebetween increases exponentially as the moving distance of the first support member (first roller) increases.

  Here, if a thin film such as an electrode material having a thickness of several tens of μm is pressed as an object to be compressed, the gap length between the peripheral surfaces of the first and second rollers is several tens of μm. On the other hand, the radius of the first and second rollers is several hundred mm, and even if the first support member (first roller) is largely moved, the amount of change in the gap length between the peripheral surfaces of the first and second rollers is Get smaller. Since the gap adjustment direction is different from the press load direction in this way, fine adjustment of the gap length between the peripheral surfaces of the heavy first and second rollers is facilitated, and the object to be compressed is increased. It can be pressed to an accurate thickness.

  In addition, since a hydraulic cylinder, a pump, piping, and the like that are conventionally required are not required, the number of parts of the roll press apparatus can be reduced, and the configuration of the roll press apparatus is simplified. Further, since the pressing load is received by the guide member, the stress path (path where the force is applied) is a path from the guide member to the first and second rollers, and the first hydraulic pressure cylinder passes through the frame. The path is shorter than the path to the first and second rollers, and the roll press apparatus can be downsized.

  (Claim 2) The guide member allows movement of the object to be compressed in the feed direction with respect to one of the first and second support members that respectively support the first and second rollers. For example, when the feed direction of the object to be compressed is set in the horizontal direction, the first roller and the second roller may be arranged in the vertical direction, and the first roller may be configured to be movable in the horizontal direction with respect to the second roller. Therefore, the structure of the roll press apparatus becomes simple and the apparatus can be further downsized.

  (Claim 3) The gap adjusting device moves the gap between one of the first and second support members within a range that does not include the case where the gap length between the peripheral surfaces of the first and second rollers is in the initial state. Adjust the length. Since the gap length between the peripheral surfaces of the first and second rollers is in the initial state, for example, when the first support member moves in one direction with respect to the second support member, the gap between the peripheral surfaces of the first and second rollers Although the gap length gradually increases, the gap length gradually increases even when moving in the other direction. For this reason, when the first support member is moved in one direction and the other direction within a range including the case where the gap length between the peripheral surfaces of the first and second rollers is in the initial state, the gap is reduced. There is a risk that your intention will grow. Therefore, by moving the first support member in one direction and the other direction within a range that does not include the case where the gap length between the peripheral surfaces of the first and second rollers is in the initial state, the size of the gap length is ensured. Can be adjusted.

It is the figure which looked at the roll press apparatus from the rotating shaft direction of the roller. It is the sectional view on the AA line of FIG. (A) is a figure which shows the initial gap state before the gap adjustment between the surrounding surfaces of a 1st and 2nd roller, (B) is a figure which shows the adjustment gap state after gap adjustment, (C) is between gaps The figure which shows the state which lets a to-be-compressed object pass through, (D) is a figure which shows the retire state which removes to-be-compressed object from between gaps. It is a figure which shows the state of the gap length between the surrounding surfaces of the 1st and 2nd roller by the movement of a 1st roller. It is a figure which shows the relationship between the gap length between the surrounding surfaces of a 1st and 2nd roller, and the moving distance of a 1st roller. It is a figure which shows the stress path | pass of the roll press apparatus of this embodiment. It is a figure which shows the stress path | pass of the conventional roll press apparatus. It is a figure which shows the roll press apparatus provided with another example of the guide member corresponding to FIG.

(1. Machine configuration of roll press machine)
The roll press apparatus is an apparatus for pressing an electrode material of several tens of micrometers with an applied pressure of several tens of TN with an accuracy of ± several micrometers, and will be described with reference to FIGS. 1 and 2.

  As shown in FIGS. 1 and 2, the roll press device 1 includes first and second rollers 2 and 3, first and second support members 4 and 5, guide members 6 a and 6 b, and a gap adjusting device 7. And the drive device 8.

  The first and second rollers 2 and 3 are formed, for example, in a cylindrical shape with a diameter of several hundred mm from stainless steel. At the centers of both end faces 21a, 21b, 31a, 31b of the first and second rollers 2, 3, roller shafts 22, 32 having a diameter smaller than the diameters of the first and second rollers 2, 3 penetrate and project. Has been. The first and second rollers 2 and 3 are accommodated in the first and second support members 4 and 5, the roller shafts 22 and 32 are parallel and parallel, and the roller peripheral surfaces 23 and 33 are a gap G having a predetermined distance. Opened up and down. The first and second rollers 2 and 3 press an electrode material in which an active material is applied to at least one of the front and back surfaces of the metal foil that is passed through the gap G between the roller peripheral surfaces 23 and 33.

  The first and second support members 4 and 5 are formed in a hollow box shape that can accommodate the first and second rollers 2 and 3, for example, with stainless steel. On both side surfaces 41a, 41b, 51a, 51b of the first and second support members 4, 5, roller shafts of the first and second rollers 2, 3 accommodated in the first and second support members 4, 5 are provided. Bearings 42 a, 42 b, 52 a, 52 b to which 22 and 32 can be fitted are fitted. The first and second support members 4 and 5 support the first and second rollers 2 and 3 rotatably around the roller shafts 22 and 32 via bearings 42a, 42b, 52a and 52b, respectively. On the side surface 51d side perpendicular to the side surface 51a of the upper surface 51c of the second support member 5, a protruding portion 53 to which the gap adjusting device 7 is attached is provided.

  The guide members 6a and 6b are known linear guides, and include bases 61a and 61b formed in a rail shape, sliders 62a and 62b, and the like. The bases 61a and 61b are each formed in a substantially T-shaped cross section, and the sliders 62a and 62b are formed in a substantially horizontal C-shape that can be engaged with a substantially T-shaped upper portion of the bases 61a and 61b. Has been. The bases 61 a and 61 b are fixed in parallel and in parallel at both side edges of the upper surface 51 c of the second support member 5 at right angles to the roller shafts 22 and 32 of the first and second rollers 2 and 3.

  The sliders 62a and 62b are perpendicular to the roller shafts 22 and 32 of the first and second rollers 2 and 3 so that they can be engaged with the bases 61a and 61b via balls (not shown) built in the bases 61a and 61b. In addition, they are fixed in parallel and in parallel at both side edges of the lower surface 41 c of the first support member 4. The first support member 4 to which the sliders 62a and 62b are fixed is allowed to move in the horizontal direction (first direction other than the compression direction) relative to the second support member 5 to which the bases 61a and 61b are fixed. Movement in the vertical direction (second direction orthogonal to the first direction) is restricted. That is, the movement of the first support member 4 (first roller 2) is allowed in the allowable direction (horizontal direction) indicated by the arrow H, and is restricted in the restricting direction (vertical direction) indicated by the arrow V.

  The gap adjusting device 7 is a device that adjusts the gap length between the roller peripheral surfaces 23 and 33 of the first and second rollers 2 and 3 by moving the first support member 4 in the horizontal direction by the guide members 6a and 6b. And includes a ball screw mechanism 71, a motor 72, and the like. The first nut 71 a of the ball screw mechanism 71 is inserted into a hole 41 e provided in a side surface 41 d perpendicular to the side surface 41 a of the first support member 4 and is bolted. The second nut 71b of the ball screw mechanism 71 is inserted into a hole 51e provided in the projecting portion 53 of the second support member 5 so as to be coaxial with the first nut 71a and fixed with a bolt. The ball screw 71 c of the ball screw mechanism 71 is screwed into the first and second nuts 71 a and 71 b and one end is connected to the motor shaft of the motor 72. The motor 72 is bolted to the protruding portion 53 of the second support member 5.

  The drive device 8 includes first and second gears 81 and 82 and a motor 83. The first and second gears 81 and 82 are large gears of a power transmission module, and are attached so as to mesh with the roller shafts 22 and 32 of the first and second rollers 2 and 3, respectively. The motor 83 is attached to the second support member 5 so that the gear 84 attached to the motor shaft and the second gear 82 mesh with each other. Since the first and second gears 81 and 82 are set to the same number of teeth and directly mesh with each other, the first and second rollers 2 and 3 are structured to rotate in the opposite directions at the same peripheral speed. Yes.

(2. Operation of roll press machine)
As a preparatory step, the gap length between the roller peripheral surfaces 23 and 33 of the first and second rollers 2 and 3 (hereinafter simply referred to as gap length) is adjusted to be the same as the thickness of the electrode material after pressing. Specifically, as shown in FIGS. 3A and 3B, the motor 72 of the gap adjusting device 7 is driven, and the first support member 4 (first roller 2) is moved to the second support member 5 (second The roller peripheral surface 23 of the first roller 2 supported by the first support member 4 is moved from the roller peripheral surface 24 of the second roller 3 supported by the second support member 5. Separate. Then, as shown in FIG. 3A, the gap length increases from T in the initial state to T as shown in FIG. 3B.

Here, as shown in FIG. 4A, the gap length T is determined by the moving distance L of the first support member 4 (first roller 2), the initial gap length To, and the radii of the first and second rollers 2 and 3. R can be represented by the following formula (1).
Tn = ((2R + To) ^ 2 + L ^ 2) ^ 0.5-2R (1)

  As shown in FIG. 4B, when the movement distance L of the first support member 4 (first roller 2) is represented by a graph with the horizontal axis representing the movement distance L and the gap length T representing the vertical axis, the gap length T represents the first support member. 4 (first roller 2) increases exponentially as the moving distance L increases. As described above, the gap adjusting device 7 adjusts the gap length T to be the same as the thickness of the electrode material after pressing.

  However, the gap length T is adjusted by moving the first support member 4 within a range not including the case where the gap length T is in the initial state (To). When the first support member 4 moves in one direction with respect to the second support member 5 from when the gap length T is in the initial state To, the gap length T gradually increases. It grows gradually. For this reason, if the first support member 4 is moved in one direction and the other direction in a range including the case where the gap length T is in the initial state, there is a possibility that the intention of reducing the gap length T will increase. is there. Therefore, the size of the gap length T can be reliably adjusted by moving the first support member 4 in one direction and the other direction within a range not including the case where the gap length T is in the initial state To.

  Next, as a production process, the electrode material is supplied to the roll press apparatus 1 and pressed. Specifically, as shown in FIG. 3C, the motor 83 of the driving device 8 is driven, the first and second rollers 2 and 3 are rotated, and the electrode material E is fed to the gap G in the feed direction S (this In the example, it is fed in the horizontal direction H). Then, the tip portion of the electrode material E is drawn between the roller peripheral surfaces 23 and 33 of the first and second rollers 2 and 3 that are rotating in the reverse direction, and in the compression direction P (in this example, from the center of the first roller 2). Compressed in the direction toward the center of the second roller 3, the thickness of the electrode material E is pressed to the adjusted gap length T. Then, when the pressing of the electrode material E having a predetermined length is completed, the electrode material E is taken out from the roll press apparatus 1. Specifically, the driving of the motor 83 of the driving device 8 is stopped, the motor 72 of the gap adjusting device 7 is redriven, and the first support member 4 is fed to the second support member 5 in the feed direction S (horizontal direction H). Move to. 3D, the roller peripheral surface 23 of the first roller 2 can be greatly separated from the roller peripheral surface 24 of the second roller 3, so that the electrode material can be easily removed from the roll press device 1. Can be taken out.

(3. Effect of roll press machine)
The guide members 6a and 6b are configured so that the first support member 4 that supports the first and second rollers 2 and 3, respectively, with respect to the second support member 5 is the first direction other than the compression direction by the first and second rollers 2 and 3. The movement in the horizontal direction is allowed as the direction, and the movement in the vertical direction is restricted as the second direction orthogonal to the first direction. Then, the gap adjusting device 7 adjusts the gap length T by moving the first support member 4. Since the roll press apparatus 1 presses an electrode material having a thickness of several tens of μm, the gap length T is several tens of μm, whereas the radius R of the first and second rollers 2 and 3 is several hundred mm. Yes, even if the first support member (first roller) 4 is moved greatly, the amount of change in the gap length T becomes small. Since the gap adjustment direction and the press load direction are different from each other in this manner, fine adjustment of the gap length T between the peripheral surfaces 23 and 33 of the heavy first and second rollers 2 and 3 is easy. Thus, the electrode material can be pressed to a highly accurate thickness.

  Moreover, since the hydraulic cylinder, pump, piping, etc. which were conventionally required become unnecessary, the number of parts of the roll press apparatus 1 can be reduced and the structure of the roll press apparatus 1 becomes simple. Further, as shown in FIG. 5A, in the roll press apparatus 1 of the present embodiment, the stress path (path where the force is applied) S has a structure in which the press load P is received by the guide members 6a and 6b. This is a path indicated by a dotted line from the members 6a and 6b to the first and second rollers 2 and 3. On the other hand, as shown in FIG. 5B, in the conventional roll press apparatus 90, the stress path SS is a path indicated by a dotted line from the hydraulic cylinder 91 through the frame 92 to the first and second rollers 93 and 94. . Therefore, the stress path S in the roll press apparatus 1 of the present embodiment is a shorter path than the stress path SS in the conventional roll press apparatus 90, and the roll press apparatus 1 of the present embodiment is smaller than the conventional roll press apparatus 90. Can be

  The guide members 6a and 6b allow the first support member 4 that supports the first and second rollers 2 and 3 to move in the feed direction of the electrode material with respect to the second support member 5, respectively. Since the feeding direction of the electrode material is the horizontal direction, the first roller 2 and the second roller 3 may be arranged in the vertical direction, and the first roller 2 may be configured to be movable in the horizontal direction with respect to the second roller 3. Therefore, the structure of the roll press apparatus 1 becomes simple and the apparatus can be further downsized.

(4. Machine configuration of another example of roll press device)
FIG. 6 is a view showing a roll press apparatus provided with a guide member different from the above-described guide members 6a and 6b in correspondence with FIG. 2, and the same constituent members are assigned the same reference numerals and detailed description thereof will be given. Is omitted. The guide members 9a and 9b of the roll press device 90 include projecting portions 91a and 91b formed in a rail shape, engaging portions 92a and 92b, a plurality of rollers 93a and 93b, and the like. The projecting portions 91a and 91b have a rectangular cross-sectional shape, and are integrally formed so as to extend in the horizontal direction on both side edges on the upper surface 51c side of the both side surfaces 51a and 51b of the second support member 5, respectively. Yes.

  The engaging portions 92a and 92b are substantially C-shaped so that the cross-sectional shape can be engaged with the projecting portions 91a and 91b, and are horizontal to both side edges on the lower surface 41c side of the both side surfaces 41a and 41b of the first support member 4. Each is integrally formed so as to extend in the direction. The plurality of rollers 93a and 93b are arranged in parallel on the upper and lower surfaces inside the engaging portions 92a and 92b so as to be rotatable as the first support member 4 moves. The first support member 4 in which the engaging portions 92a and 92b are integrally formed is allowed to move in the horizontal direction with respect to the second support member 5 in which the projecting portions 91a and 91b are integrally formed. That is, movement in the compression direction by the first and second rollers 2 and 3 is restricted.

  According to the roll press device 90 configured as described above, the guide members 9a and 9b are formed of the electrode material of the first support member 4 that supports the first and second rollers 2 and 3 with respect to the second support member 5, respectively. Allow movement in the feed direction. Since the feeding direction of the electrode material is the horizontal direction, the first roller 2 and the second roller 3 may be arranged in the vertical direction, and the first roller 2 may be configured to be movable in the horizontal direction with respect to the second roller 3. Therefore, the structure of the roll press device 90 becomes simple, and the size of the device can be further reduced.

(5. Modifications)
In the above-described embodiment, the roll press apparatus 1 that presses the electrode material has been described. However, any roll press apparatus that presses a film-like object to be compressed is applicable. Further, although the first support member 4 (first roller 2) is configured to permit or restrict movement relative to the second support member 5 (second roller 3), the second support member 5 (second roller 3) is configured to be allowed to move. The first support member 4 (first roller 2) may be configured to permit or restrict movement. Further, although the allowable direction of movement is the horizontal direction and the restriction direction of movement is the vertical direction, the direction is not limited to these directions, and the compression direction by the first and second rollers 2, 3, that is, the first roller 2. Any configuration that allows movement in the first direction other than the direction from the center toward the center of the second roller 3 and restricts movement in the second direction orthogonal to the first direction may be used.

DESCRIPTION OF SYMBOLS 1,90: Roll press apparatus, 2: 1st roller, 3: 2nd roller 4: 1st support member, 5: 2nd support member, 6a, 6b, 9a, 9b: Guide member 7: Gap adjustment apparatus, 8 : Driving device 22, 32: Roller shaft 23, 33: Roller peripheral surface 61a, 61b: Base 62a, 62b: Slider 71: Ball screw mechanism 72: Motor 81: First gear 82: Second gear 83 : Motor, T: gap length H: horizontal direction (first direction, allowable direction), V: vertical direction (second direction, regulation direction)
P: compression direction (direction from the center of the first roller 2 toward the center of the second roller 3)

Claims (3)

First and second rollers arranged in parallel and in parallel with a gap between the peripheral surfaces;
First and second support members for rotatably supporting the first and second rollers around an axis, respectively;
One of the first and second support members is allowed to move in a first direction other than the compression direction by the first and second rollers with respect to the other, and movement in a second direction orthogonal to the first direction is restricted. A guide member to be
A gap adjusting device that adjusts the gap length between the peripheral surfaces of the first and second rollers by moving one of the first and second support members in an allowable direction by the guide member;
A roll press device comprising: a drive device that rotationally drives the first and second rollers and presses a material to be compressed that is passed through the gap. In claim 1,
The roll press apparatus in which the allowable direction of the guide member is a feeding direction of the object to be compressed. In claim 1 or 2,
The gap adjusting device moves the one of the first and second support members by moving one of the first and second support members within a range not including the case where the gap length between the peripheral surfaces of the first and second rollers is in an initial state. Roll press device that adjusts the length.

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