JP2003094198A - Manufacturing method of thickness controller, continuous sheet press device equipped therewith, and continuous sheet by using sheet press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a thickness controller enabling high-accuracy control of a clearance for a press device achieving the continuous, stable manufacturing of a thin sheet-like product with an even thickness, the press device equipped with the controller, and continuous sheets manufactured by using the press device. SOLUTION: This thickness controller is applied to the press device having a pressurizing means for the continuously-fed sheets (2). The pressurizing means has a pressurizing section (7, 7a) supported by a support section to freely move back and forth in its pressurizing direction, and a fine justifying means providing fine adjustment of the moving position for the pressurizing section (7, 7a). This fine justifying means has a taper face 9a formed on a part of the pressurizing section (7, 7a), and a wedge-shaped structure (10) sliding to support the taper face 9a and also sliding orthogonal with the pressurizing direction of the pressurizing section (7, 7a).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is characterized by a thickness control device in a press machine, and is capable of continuously manufacturing products such as a print substrate and an electrode sheet that are thin and require uniform thickness. And a sheet thickness control device applied to a sheet pressing device for providing a continuous sheet having uniform thickness accuracy using the control device. TECHNICAL FIELD The present invention relates to a sheet pressing apparatus equipped with a device and a pressing method thereof.

[0002]

2. Description of the Related Art The recent remarkable development of information and communication technology is one of the causes of the increase in compactness and large capacity such as miniaturization and thinning of electric components such as a printed circuit board and a secondary battery.
In addition, it is largely due to the achievement of cost reduction.

In order to achieve downsizing and thinning, and to maximize the performance of members, it is necessary to pursue the uniformity of such members, and the uniformity of physical precision, especially the dimensions, and the thickness First of all, the accuracy of the saber must be overcome.

Printed substrates, electrode sheets for secondary batteries, etc. are generally obtained by press molding, but continuous press molding is an indispensable technique for achieving cost reduction.

As a continuous press machine, for example, Japanese Patent Publication No. 5-
A double steel belt press machine using a two-stage endless steel belt disclosed in Japanese Patent Publication No. 13760 and Japanese Patent Publication No. 3-51205 is proposed.

In the double steel belt press machine disclosed in Japanese Patent Laid-Open No. 5-13760, endless steel belts that are run by being hung on a pair of front and rear drums are provided so as to face each other vertically. Supports are arranged inside the circumferential surface of each steel belt, and the rolls connected to each other move while rolling on the inner surfaces of the belts facing each other. Either the upper roll or the lower roll is provided with a roll guide that supports and guides the other roll from the left and right at the pressed portion, and further, a meandering prevention guide that prevents meandering of the roll group is provided on the side of the roll group. Has been.

According to the present invention, the upper and lower opposed rolls are always held by the roll guides on substantially the same vertical plane with respect to the traveling sheets, and the sheets can be pressed continuously with a stable high pressing pressure with high precision. In addition, the meandering prevention guide can always hold the roll group in the proper position in the roll axis direction, enables stable continuous operation for a long time, and excessive stress is applied to the chain or a device connecting the equivalent roll group. The effect is to prevent the above, and the durability of this type of connecting device can be significantly improved.

On the other hand, the double steel belt press machine described in Japanese Patent Publication No. 3-51205 uses a belt or sheet-like material which is tensioned on at least two drums, and the belt or sheet-like material is used as an object to be compressed. The continuous pressurization is performed by applying pressure through the belt or sheet by the fluid pressure of a fixed pressurizing chamber provided outside the sheet.
A sealing portion is provided at the outer edge of the fixed pressurizing chamber, and a sealing liquid whose viscosity increases as the temperature becomes lower is used at a higher pressure than the fluid in the pressurizing chamber and a fluid viscosity in the pressurizing chamber. It is supplied with a higher viscosity, and the sealing liquid is filled between the outer edge and the belt or the sheet-like material.

With this structure, the pressurizing fluid in the pressurizing chamber is completely prevented from leaking to the outside, and at the same time, the outer edge and the belt or sheet are kept in non-contact with each other. Even if it is used, it is possible to continuously apply a high pressure to the object to be compressed through the steel belt while maintaining a good polishing surface for a long time without applying a rubbing force to the pressure chamber surface side. There is.

According to these double steel belt press machines, it is possible to continuously press-form a running sheet, and a heating means is provided in a pressure applying device arranged on the circumferential surface of the belt or inside the sheet-like material. By including the above, it becomes possible to simultaneously pressurize and heat cure.

[0011]

With the recent trend toward thinner products, the demand for uniform product thickness has become more stringent than ever before. To meet this demand, the above-mentioned continuous In addition to increasing the rigidity of the press device and the pressure applying device, a control device for performing fine adjustment of the clearance (dimension between presses) with high accuracy is indispensable.
However, under the present circumstances, the control device as described above, including the press device disclosed in the above publication, has not yet been developed.

In particular, for an electrode sheet for a secondary battery or the like, a precursor sheet thereof is obtained by a papermaking method using short fibers, and a thermosetting resin is attached to the precursor sheet, which is once dried and impregnated, and after curing. Generally, it is manufactured by firing at a high temperature, or a thermosetting resin is adhered to a long-fiber woven cloth such as a cloth and cured, and then fired at a high temperature. Since unevenness and unevenness of the sheet thickness at the overlapping and non-overlapping parts of the fiber occur, the surface texture is non-uniform, and the precursor sheet having these non-uniform thickness is continuously impregnated and cured by heating. In the pressing process, the clearance of the pressing device through which the precursor sheet passes must be finely adjusted with high accuracy.

That is, in order to provide an average thin sheet having a uniform thickness, accurate thickness control is required, and continuous sheets can be manufactured in a stable state with small thickness unevenness. I won't. To that end, there is an urgent need to develop a device that can control the clearance of the press device with high precision. It is an object of the present invention to develop the above-mentioned control device and to provide a manufacturing method capable of stably and continuously manufacturing a thin sheet-like material having a uniform thickness.

[0014]

Means and Actions for Solving the Problems This problem is solved by adopting the constitution of the present invention described below.

The main constitution of the present invention is applied to a pressing device provided with a pressing means for continuously feeding sheets, and the pressing means is supported by a support part and is capable of advancing and retracting in the pressing direction. And a position fine adjustment means for finely adjusting the advance / retreat position of the pressure portion, wherein the position fine adjustment means is a tapered surface formed in a part of the pressure portion. And a wedge-shaped member which slidably supports the same tapered surface and slides in a direction orthogonal to the pressing direction of the pressing unit.

The pressing means comprises a pair of pressure rolls arranged on both sides of the sheet in order to press the sheet surface,
Or a pressing table arranged on one side of the sheet and one or more pressing members arranged on the other side of the sheet,
For example, it is provided with a fluid cylinder for pressing the roll toward a partner roll or a press table, or provided with a fluid pressurizing chamber as described in, for example, Japanese Patent Publication No. 3-51205. The running continuous sheet is pressed by operating the cylinder, or the running continuous sheet is pressed by supplying a pressurized fluid from the fluid pressure chamber.

The taper surface is formed, for example, on a part of each pressing member such as the roll advancing and retreating in the pressing direction or each supporting member of the fluid pressurizing chamber, and the wedge-shaped body is in sliding contact with the moving path of the taper surface. It is arranged and slidably provided at right angles to the pressing direction.

Now, the clearance between the pressing members or between the fluid pressurizing chamber and the sheet is set according to a conventional method, and the continuously supplied sheets are pressed. During this press,
When the clearance becomes improper in a very small range due to changes in external conditions or the like and further high-precision adjustment is required, the wedge-shaped body is slid in a direction orthogonal to the pressing direction. For example, if the clearance is too small,
Slide the wedge in the insertion direction by the required amount. This sliding increases the clearance. If the clearance is too large, the wedge-shaped body is slid in the pull-out direction by a required amount. This sliding reduces the clearance. The clearance adjustment amount at this time is
If the inclination angle of the wedge-shaped body is constant, it is proportional to the sliding amount.

The wedge-shaped body preferably has an operating means for automatically sliding the wedge-shaped body in accordance with the sheet thickness after pressing. For example, a sheet thickness detecting device is arranged on the downstream side of the pressing device, and a command signal is sent from the control portion to the operating means of the wedge-shaped body based on a signal from the detection device, and the wedge-shaped body is moved to the pressing portion. It can also be configured to slide a required amount in a direction orthogonal to the pressing direction.

The pressurizing unit has a pressurizing roll that moves forward and backward in the pressing direction by a fluid pressure cylinder, and is provided on a supporting unit of the pressurizing roll, such as a bearing unit or a supporting frame, or a supporting block of the bearing unit. The tapered surface is formed. Further, when the pressurizing section has a fluid pressurizing device, the tapered surface is formed on a supporting part of the fluid pressurizing device, such as a supporting frame. That is, by sliding the wedge-shaped body, the pressure roll and the fluid pressure device together with the support portion are moved forward and backward in the pressure direction.

The pressing at this time may directly press the sheet surface with a pressing member such as the roll or a pressurized fluid, but in order to obtain a uniform sheet surface, it may be pressed between the rolls and the sheet surface, or It is preferable to indirectly press the sheet by interposing a press plate made of steel or synthetic resin or an endless belt on the press surface of the sheet. A rigid plate or the like having a desired thickness may be interposed so as to secure a desired clearance, but it is unsuitable for a request that exceeds the thickness accuracy of the rigid plate itself.

Further, in the present invention, it is preferable that the pressing portion is arranged on both sides of the sheet. The pressing part may be arranged on one side of the sheet and the press plate material may be arranged on the other side, but it is smoother to positively and uniformly apply pressure from both sides of the sheet. Is preferable because a sheet having a uniform surface can be obtained.

The pressing unit may be provided in multiple stages in the sheet feeding direction. In this way, it is preferable to provide the pressing portions in multiple stages in the sheet feeding direction, since it is easy to sequentially change the sheet thickness and finally obtain a sheet having a desired thickness. Further, it is desirable that the pressing device further has a heating means. In addition to the above features, for example,
The fiber sheet can be continuously impregnated with the matrix resin, dried, and cured, and the like.

By using the pressing device having the sheet thickness adjusting device having the above-mentioned structure, the resin impregnation operation and the heating / pressurizing operation to the continuous sheet made of carbon fiber and thermosetting resin can be performed independently. Alternatively, a resin impregnation operation and a heating / pressurizing operation can be simultaneously performed on a continuous sheet composed of carbon fibers and a thermosetting resin, and an efficient and high-quality thin sheet can be manufactured.

The wedge-shaped body may be disposed only on one side edge portion with respect to the seat surface, or may be disposed on both side edge portions. When a roll is used as the pressurizing means, a support device such as a backup roll group similar to the rolling roll in the steel factory can be applied as necessary as a measure against the bending of the roll.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Representative embodiments of the present invention will be specifically described below with reference to the drawings. 1 is a side view of a pressing apparatus having a thickness control device according to a preferred embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a preferred embodiment of the present invention. It is a perspective view which shows the shape of a wedge-shaped body roughly.

According to the pressing apparatus 1 shown in FIG. 1, a pair of front and rear drums 3a, 4 which constitute a part of the pressing means of the present invention are arranged at required intervals in the longitudinal direction of the continuous sheet 2.
a and 3b, 4b are arranged vertically with a required clearance. A pair of front and rear drums 3a, 4a and 3b,
Steel endless belts 5 and 6 are respectively wound around 4b, and driven and rotated in the transport direction of the continuous sheet 2. Inside the upper endless belt 5, a pressure roll 7 which is a pressure means in the present invention, and a fluid cylinder 8 for moving the pressure roll 7 back and forth in the pressing surface direction of the continuous sheet 2 are installed. The pressure roll 7 has a heating source, and the heating source is not particularly limited, and high temperature fluid, electricity or other means can be adopted, but electrical heating is preferable from the viewpoint of easy temperature control. Used, generally, an electromagnetic induction heating roll is preferably used.

According to this embodiment, as described above, the pressure roller 7 and the fluid pressure cylinder 8 are employed as the pressure portion of the pressure means, and the continuous sheet 2 to be transferred is applied via the endless belt 5. Although the pressure is applied, the pressing means in the present invention does not use an endless belt,
By operating the fluid pressure cylinder 8, the continuous sheet 2 can be directly pressed by the pressure roll 7, or as described above, for example, the above Japanese Patent Publication No. 3-51.
A fluid pressurizing chamber as described in Japanese Patent Publication No. 205 may be adopted as the pressurizing means.

A pair of front and rear drums 3a, 4a and 3b, 4
b, drums 3a, 4a or 3b arranged above and below,
4b is synchronously driven by a rotary drive source (not shown), and the upper and lower endless belts 5 and 6 are rotationally driven in mutually opposite directions. The continuous sheet 2 is introduced into the clearance between the upper and lower endless belts 5 and 6 which are driven and rotated, thereby enabling continuous press processing.

In this embodiment, the pressure roll 7 is used.
Is placed inside the upper endless belt 5 and
A lower pressure roll 7a is rotatably fixed at a position facing the pressure roll 7 inside the lower endless belt 6, but instead of the lower pressure roll 7a, a press table (not shown) or the like is used. It is also possible to arrange a receiving member for. The roll 7a arranged below this is also a heating roll.

Further, the present invention has a position fine adjustment means for finely adjusting the clearance between the pressing portions. It is a feature of the present invention that extremely fine clearance control between the upper and lower heating rolls 7 and 7a is performed by using this position fine adjustment means, which makes it possible to secure uniform thickness accuracy in the sheet width direction. Become.

According to this embodiment, as shown in FIG.
The position fine adjustment means is a bearing box 9 for the pressure roll 7 fixed to a frame (not shown) that can be moved up and down.
2 is provided with a tapered surface 9a formed on the lower surface and a wedge-shaped body 10 that slidably supports the tapered surface 9a as shown in FIGS. The wedge-shaped body 10 advances and retreats along a tapered surface 9a orthogonal to the pressurizing direction of the pressurizing portion on a machine body (not shown) by a ball screw or the like, and the bearing box slidably supported by the taper surface. 9, in other words, the pressure roll 7 is moved up and down. The vertical movement dimension of the pressure roll 7 can be continuously adjusted by the taper angle α formed on the bearing portion 8 and the relative movement amount of the wedge-shaped body 10.

The taper angle α of the wedge-shaped body 10 is not particularly specified, but generally, the taper angle α of the wedge-shaped body 10 is so high that the average thickness is thin and the tolerance of the thickness unevenness is small so that high precision is required. However, it is more preferable that the effect of the present invention can be fully enjoyed when the angle is 15 degrees or less.

The wedge-shaped body 10 is on one side with respect to the continuous sheet surface,
That is, it may be installed only on the upper side as shown in FIG. 2, may be installed on the lower side in FIG. 2, or may be installed on both upper and lower sides, and at both ends in the seat width direction (FIG. The degree of insertion of the wedge-shaped body 10 into the tapered surface 9a at the left and right ends of 2 can be mechanically and electrically interlocked as necessary.

Although illustration is omitted, the above-mentioned Japanese Patent Publication No. 3-
When the fluid pressurizing chamber as described in Japanese Patent No. 51205 is adopted as the pressurizing means in the present invention, the above-mentioned tapered surface is formed in a part of the fluid pressurizing chamber, and the tapered surface is the same. By disposing the wedge-shaped body that is slidably supported on the machine body and advancing and retracting the wedge-shaped body in the direction orthogonal to the pressing direction of the continuous sheet 2, the clearance between the pressing surface of the fluid pressurizing chamber and the continuous sheet surface is increased. Adjust. These adjustments
For example, by an optical or electrical detection means (not shown),
At the same time that the current clearance is detected, the same detection signal is sent to a control device (not shown) to actuate the ball screw and nut etc. as described above to move the wedge-shaped body forward and backward, whereby automatic adjustment control can be performed.

The drums 3a, 4a or 3b, 4
b can also serve as a meandering adjustment function and a preheating function of the endless belts 5 and 6. Further, a preheating mechanism, a cooling mechanism, or the like may be provided between the sheet entrance side drums 3a and 3b and the pressure roll 7 or between the pressure roll 7 and the sheet exit side drums 4a and 4b, if necessary. It is also possible to attach it. The fluid pressure cylinder 8 may be appropriately selected from pneumatic pressure and hydraulic pressure in consideration of the working pressure on the continuous sheet 2. The materials of the bearing box 9 and the wedge-shaped body 10 are not particularly limited as long as they can be selected on the basis of mechanical strength and corrosion resistance, but the tapered surface 9a is subjected to heat treatment such as quenching from the viewpoint of securing the strength of the material itself. It is preferable that In the embodiment shown in FIG. 2, the bearing box 9 is directly tapered,
It is also possible to act indirectly by using a block or the like having a rubbing surface with the wedge-shaped body 10.

(Examples) The present invention will be described in more detail below based on examples. The composition of the continuous sheet and the thermosetting resin before the press treatment were set to constant conditions as follows.

The continuous sheet was composed of chopped carbon fiber, binder and thermosetting resin, and had a width of 160 mm and a thickness of 0.8 mm. Carbon fiber average fiber length: 6 mm Binder: PVA short fiber, carbon fiber ratio 20 wt% contained Thermosetting resin: Phenol resin (Phenolite 5900 manufactured by Dainippon Ink and Chemicals, Inc.) 15% by mass in ethanol solution Then, 75 parts by weight of 100 parts by weight of carbon fiber were adhered.

(Example 1) Using the press apparatus shown in FIGS. 1 to 3, the heating temperature of the pressure roll was set to 250 ° C.
The above-mentioned continuous sheet is continuously 1 under the nip pressure condition of Pa.
Pressed 5 m. Six sets of upper pressure rolls each having a fluid pressure cylinder were installed in the sheet advancing direction, and a residence time between the first pressure roll and the sixth pressure roll was set to 2 minutes.
All the pressure rolls have a diameter of 160 mm, the pitch of the pressure rolls is 220 mm in the advancing direction of the continuous sheet, and the clearance between the pressure rolls is 5.5 mm in consideration of the belt thickness of 1.2 mm, as shown in FIG. The wedge-shaped body has a taper angle α of 8 degrees. The average thickness of the continuous sheet obtained after the press treatment was 0.3 mm, and the thickness unevenness was ± 4 μm, and a continuous sheet excellent in handleability could be obtained without problems such as cracking and chipping.

Comparative Example 1 A continuous press treatment was carried out under the same conditions as in Example 1 except that the wedge-shaped body shown in FIG. 2 was removed.
The average thickness of the continuous sheet obtained after pressing is 0.3.
However, since there is no wedge-shaped body, the clearance in the width direction of the heating roll is greatly affected by the thickness variation of the continuous sheet before the press treatment, and the thickness variation of the continuous sheet is ± 2.
It became 1 μm. It was possible to obtain a continuous sheet without problems such as cracking and chipping.

(Measurement of thickness of continuous sheet) 20, 50, 80, 110, 140 mm from one end in the width direction of the continuous sheet
5 points and 3 in the longitudinal direction (direction of continuous sheet travel)
A total of 250 points were measured at a 00 mm pitch of 50 points. The measuring instrument is a micrometer manufactured by Mitutoyo, and the spindle diameter is 5 mm.

From the above results, it can be understood that the pressing apparatus according to the present invention makes it possible to continuously and stably manufacture a thin sheet product which is required to have a uniform thickness. Further, according to the present invention, since it is possible to control the minute clearance in the pressurizing section, the quality of the product is improved, and since continuous production is possible, it is possible to achieve the cost reduction accompanying the productivity improvement. The significance is extremely large.

[Brief description of drawings]

FIG. 1 is a side view schematically showing a pressing device having a thickness control device according to a preferred embodiment of the present invention.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is a perspective view schematically showing a wedge-shaped body according to a preferred embodiment of the present invention.

[Explanation of symbols]

1 Press machine 2 continuous sheets 3a, 4a Upper drum on the sheet entry side and sheet exit side 3b, 4b Lower drums on the entrance and exit sides of the sheet 5,6 Upper and lower endless belt 7 Top pressure (heating) roll 7a Lower pressure (heating) roll 8 fluid pressure cylinder 9 bearing box 9a Tapered surface 10 wedge-shaped body α Wedge taper angle

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) // B29K 101: 10 B29K 101: 10 105: 08 105: 08 B29L 7:00 B29L 7:00 (72) Inventor Oda Kazuhiko 20-1 Miyuki-cho, Otake-shi, Hiroshima Mitsubishi Rayon Co., Ltd. Otake Works (72) Inventor Hidehiko Ohashi 20-1 Miyuki-cho, Otake-shi, Hiroshima Mitsubishi Rayon Co., Ltd. Central Technical Research Institute F-term (reference) 4E090 AA04 AB04 DA09 FA02 HA07 4F204 AA36 AA37 AB25 AD16 AG01 AH36 AR12 FA11 FB02 FB11 FF01 FG09 FN11 FN15 FN30

Claims (12)

[Claims] 1. A pressing device, which is applied to a pressing device provided with a pressing device for continuously supplying sheets, wherein the pressing device is supported by a supporting member and is movable back and forth in the pressing direction. And a fine position adjustment means for finely adjusting the advancing / retreating position of the pressing portion, wherein the fine position adjusting means slides the tapered surface formed on a part of the pressing portion and the tapered surface. A thickness control device for a continuous sheet press device, comprising: a wedge-shaped member that is in contact with and supports and slides in a direction orthogonal to a pressing direction of the pressing unit. 2. The thickness control device according to claim 1, further comprising an operating means for sliding the wedge-shaped member in a direction orthogonal to a pressing direction of the pressing unit. 3. The pressurizing unit has a pressurizing roll that advances and retreats in the pressing direction by a fluid pressure cylinder, and the taper surface is formed on a supporting unit of the pressurizing roll. Alternatively, the thickness control device according to item 2. 4. The thickness control according to claim 1, wherein the pressurizing part has a fluid pressurizing device, and the support part of the fluid pressurizing device is formed with the tapered surface. apparatus. 5. An endless belt, which is interposed between the pressure roll or the fluid pressure device and the sheet and rotates in the moving direction of the sheet. 4. The thickness control device according to 4. 6. The thickness control device according to claim 1, wherein the pressing unit is arranged on both sides of the sheet. 7. The thickness control device according to claim 1, wherein the pressing unit is provided in multiple stages in the sheet feeding direction. 8. The thickness control device according to claim 1, wherein the pressing device further comprises a heating means. 9. A pressing device for a continuous sheet, comprising the thickness control device according to claim 1. Description: 10. A method for producing a continuous sheet, which comprises performing a resin impregnation operation on a continuous sheet made of carbon fiber and a thermosetting resin by using the pressing apparatus according to claim 9. 11. A method for producing a continuous sheet, which comprises performing a heating / pressurizing operation on a continuous sheet made of carbon fibers and a thermosetting resin by using the pressing apparatus according to claim 9. 12. A press device according to claim 9, wherein a continuous sheet of carbon fiber and a thermosetting resin is continuously impregnated with resin and heating / pressurizing operation. Continuous sheet manufacturing method.