JPH09216193A - Slitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a cutting width dimension accuracy by means of a comparatively simple and inexpensive means without applying any tension to a sheet type cut object to be cut by means of a slitter. SOLUTION: Between two pairs of rotary blades 22, 23, a smoothing plate 26 is horizontally arranged close to the lower face of a sheet type cut object 21, while close to the upper face of the sheet type cut object 21, a roller 27 is supported by supporting plates 28 freely rotationally. When a ceramic green sheet 21 formed on a carrier film is cut by means of a slitter, the ceramic green sheet 21 is cut with its carrier film face faced downward. In this process, a deflection of the ceramic green sheet 21 generated because of a force applied from joint parts between the rotary blades 22, 23 or because of its self-weight is prevented by means of the smoothing plate 26 and the roller 27. In this way, the deflection can be prevented without applying any tension to the ceramic green sheet 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitter device for cutting a sheet-like object to be cut with a constant width in the feeding direction.

[0002]

2. Description of the Related Art Conventionally, a slitter device has been used in a process of cutting a sheet-shaped object such as paper, plastic film, and ceramic green sheet produced in a factory with a constant width. As shown in FIG. 4, a conventional slitter device has a pair of upper and lower rotary blades 11 and 12 arranged to face each other at a predetermined interval, and sends a sheet-like object 13 to these rotary blades 11 and 12 to feed the sheet. The object to be cut 13 is cut into strips with a constant width along the feeding direction.

[0003]

A sheet-like object to be cut 13
When the material is a loose material such as paper, a plastic film, or a ceramic green sheet, the sheet-like object 13 to be cut is formed by the force applied from the meshing parts of the upper and lower rotary blades 11 and 12 and its own weight when cutting with a slitter device. Loosens in the vertical direction, and the amount of looseness fluctuates during the cutting process. Such variation of the slack has been a cause of varying the cutting width of the sheet-shaped object 13 to deteriorate the dimensional accuracy of the cutting width.

As a countermeasure against this, there is a structure in which a tension applying device for pulling the sheet-like object to be cut 13 in the feeding direction to prevent loosening is provided. But with this configuration,
The tensioning device complicates and enlarges the structure of the slitter device and increases the price.In addition, if the material is weak in tensile force, such as ceramic green sheet, adding tension causes deformation or damage to the cut object. Will occur. Therefore, it is not possible to adopt a method of applying tension to such a material that is weak in tensile force.

The present invention has been made in view of the above circumstances, and therefore an object thereof is to provide a cutting width dimensional accuracy by a relatively simple and inexpensive means without applying tension to a sheet-shaped object to be cut. It is to provide a slitter device capable of increasing the power consumption.

[0006]

In order to achieve the above object, a slitter device according to a first aspect of the present invention sends a sheet-shaped object to a plurality of sets of rotary blades arranged facing each other at a predetermined interval. In a sheet-shaped object to be cut into a strip shape with a constant width along the feed direction, the sheet-shaped object is provided between the plurality of sets of rotary blades in proximity to at least one side above and below the sheet-shaped object. A slack preventing means for suppressing slack of the cut object is arranged.

That is, by arranging the loosening prevention means in close proximity to the lower surface side or the upper surface side of the sheet-like object to be cut, or both sides thereof, the force applied from the meshing portions of the upper and lower rotary blades, self-weight, etc. The loosening prevention means prevents the loosening of the sheet-shaped cut object caused by. This makes it possible to cut the sheet-shaped object with high dimensional accuracy while preventing the sheet-shaped object from being loosened without applying tension to the sheet-shaped object.

Further, in the present invention, the slack preventing means is composed of a smooth plate which is installed horizontally along the sheet-shaped object to be cut. As a result, the sheet-shaped object passes through the rotary blade while sliding on the surface of the smooth plate, so that the sheet-shaped object is cut along the surface of the smooth plate with a high dimensional accuracy while maintaining a flat state.

Further, in the third aspect, the slack preventing means is composed of a roller which is rotatably installed in the feeding direction along the sheet-shaped object to be cut. As a result, the sheet-shaped cut object passes through the rotary blade while the slack is corrected by the roller, so that the sheet-shaped cut object is cut with high dimensional accuracy while maintaining a flat state.

A fourth aspect of the present invention is a slitter device suitable for cutting a ceramic green sheet formed on a carrier film, wherein the slack preventing means is horizontal along the carrier film surface of the ceramic green sheet. And a roller installed rotatably in the feeding direction along the other surface (ceramic surface) of the ceramic green sheet.

That is, the ceramic surface of the ceramic green sheet is relatively soft and easily scratched,
Since one side of the carrier film is protected by the carrier film, the carrier film surface can be slid along the smooth plate while cutting to ensure that the ceramic film surface is not loosened and the slack on the carrier film side is ensured by the smooth plate. prevent. On the other hand, the slack to the ceramic surface side without the carrier film is prevented by the roller. At this time, the gap between the roller and the smooth plate is set to be slightly larger than the thickness of the ceramic green sheet with a carrier film, and the roller freely rotates as the ceramic green sheet is fed, so that the roller and the ceramic surface rub against each other. The fit is minimized and scratches on the ceramic surface are prevented.

[0012]

DETAILED DESCRIPTION OF THE INVENTION

[First Embodiment] A slitter device according to a first embodiment of the present invention shown in FIG. 1 is a sheet-like member such as a ceramic green sheet formed on a carrier film, paper which is relatively scratch resistant, or a plastic film. It is suitable for cutting the workpiece 21.

In the structure of the slitter device, a pair of upper and lower rotary blades 22 and 23 are arranged to face each other at a predetermined interval.
Drive shafts 2 and 23 driven by motors (not shown)
It is adapted to be rotationally driven by 4, 25. Then, between the two sets of rotary blades 22 and 23, a smooth plate 26 is horizontally installed as a slack preventing means in the vicinity of the lower surface of the sheet-like object 21 to be cut.

In this structure, when the sheet-like object to be cut 21 is a ceramic green sheet formed on a carrier film, the carrier film is placed on the smooth plate 26 with the surface thereof facing downward, and the ceramic green sheet is cut. While sliding the sheet 21 on the smooth plate 26, two sets of rotary blades 2
The ceramic green sheet 21 is cut into a constant width along the feeding direction by passing the ceramic green sheets 21 and 23. At this time, the ceramic green sheet 21 is cut while being pulled in the feed direction by the rotation of the rotary blades 22 and 23.

In this slitter device, two sets of rotary blades 2 are used.
By cutting the carrier film surface of the ceramic green sheet 21 between 2 and 23 while sliding on the smooth plate 26, the ceramic green sheet 21 is cut along the smooth plate 26 in a flat state while maintaining a slack. The cutting width dimension accuracy is improved as compared with the conventional one, and the cutting yield is improved. Moreover, by sliding the carrier film surface of the ceramic green sheet 21 on the smooth plate 26, the ceramic surface of the ceramic green sheet 21 can be cut without scratches, and the deterioration of quality due to scratches can be prevented. Moreover, since the smooth plate 26 can prevent the sheet-shaped cut object 21 from loosening without applying a tension to the sheet-shaped cut object 21, a special tensioning device is not required, and the structure is simplified. It is possible to meet the demands for downsizing and cost reduction, and it is possible to cut even a material that is weak in tension with high dimensional accuracy, and it is possible to expand the range of sheet-shaped objects that can be cut by a slitter device.

A smooth plate is provided close to the upper surface side of the sheet-shaped object 21, and the sheet-shaped object 21 is moved upward by the force applied by the meshing portions of the upper and lower rotary blades 11, 12. It is needless to say that the slack may be prevented, and, of course, smooth plates may be provided on the upper and lower sides of the sheet-shaped object 21 and the sheet-shaped object 21 may be inserted between the smooth plates.

[Second Embodiment] In the second embodiment of the present invention shown in FIG. 2, instead of the smooth plate 26, for example, two rollers 27 are used as the loosening prevention means, and two rollers 27 are provided as two sets of rotary blades 22 ,.
It is arranged horizontally between 23. Each roller 27 is arranged close to the upper surface of the sheet-like object 21 to be cut and at a right angle to the feeding direction, and its rotation shaft 29 is rotatably supported by the support plate 28.

In this structure, even if the sheet-like object to be cut 21 is slackened upward by the force applied from the meshing portions of the upper and lower rotary blades 11 and 12, the sheet-like object 21 is pressed by the roller 27 from above and is cut. It is possible to prevent the cut object 21 from loosening upward. As a result, the sheet-shaped object to be cut 21 is accurately cut with a constant cutting width while maintaining a flat state. In this case, the roller 27 freely rotates as the sheet-shaped object 21 is fed, so that the friction between the roller 27 and the sheet-shaped object 21 is minimized. Therefore, even if the sheet-like object to be cut 21 is a material that is relatively soft and easily scratched, the scratches can be minimized and the quality deterioration can be suppressed.

The number of rollers 27 is not limited to two, and one or three or more rollers 27 may be provided. Also,
The rollers may be provided in the vicinity of the lower surface side of the sheet-shaped cutting object 21, or of course, the rollers may be provided on the upper and lower sides of the sheet-shaped cutting object 21 so that the sheet-shaped cutting object 2 is provided between the upper and lower rollers.
You may make it pass 1. This configuration is particularly suitable for cutting the sheet-like object 21 which is easily scratched on both sides as in the case of cutting a ceramic green sheet without a carrier film.

[Third Embodiment] The third embodiment of the present invention shown in FIG. 3 is a smooth plate 26 of the above-described two embodiments.
And the roller 27 are combined. The slitter device of this embodiment is suitable for cutting a ceramic green sheet formed on a carrier film, but may be used for cutting other sheet-shaped objects such as paper and plastic film. .

In the slitter device of this embodiment, the sheet-like object 2 to be cut is cut between two sets of rotary blades 22 and 23.
The smooth plate 26 is installed horizontally near the lower surface of the roller 1, and the roller 2 is moved near the upper surface of the sheet-shaped workpiece 21.
The rotary shaft 29 of No. 7 is rotatably supported by the support plate 28.

When the ceramic green sheet 21 formed on the carrier film is cut by this slitter device, the carrier film surface of the ceramic green sheet 21 is set to face downward. In this state, the carrier film surface of the ceramic green sheet 21 is cut while sliding along the smooth plate 26, so that the slack on the lower side of the ceramic green sheet 21 is smoothed without scratching the ceramic surface. Is surely prevented by. On the other hand, the slack to the upper surface side without the carrier film is prevented by the roller 27. At this time, the roller 27 is rotated along with the feeding of the ceramic green sheet 21, so that the friction between the roller 27 and the ceramic surface is minimized, and the ceramic surface is prevented from being scratched.

The upper and lower positional relationships between the roller 27 and the smooth plate 26 may be reversed. In this case, the ceramic green sheet 21 should be set with the carrier film surface facing upward (ie, the smooth plate side). Good.

[0024]

[Example] As a sheet-shaped cut object, 96% of two kinds of thickness of width 280 mm, thickness 0.30 mm and 0.05 mm
An alumina green sheet was used. Here, the 96% alumina green sheet comprises 96% by weight of alumina, 4% by weight of sintering aid, 60% by weight of the solvent and 10% by weight of the solvent.
All of the above binders are mixed for 16 hours to prepare a slurry, and this slurry is formed into a sheet on a carrier film (resin film) by a doctor blade method and dried.

60% of this 96% alumina green sheet
A roll of m rolls was used as a sample and cut at a feed speed of 3 m / min. As the slitter device used in this cutting test, the slitter device of each of the first to third embodiments was used, and in addition, a cutting test using a conventional slitter device (no slack preventing means, no tension) was also performed. ,
The cutting test results are shown in Table 1. In addition, paper (thickness: 85
For the PET film (thickness: 100 μm), the cutting test was performed using the slitter device of the third embodiment and the conventional slitter device in the same manner as the 96% alumina green sheet. The results are shown in Table 2. In these cutting tests, cutting was performed three times by each cutting method, and the respective process capability Cp and the process capability Cpk of all data were calculated by the following formula.

Cp = T / 6σ (where T is a tolerance) Cpk = (1−K) · T / 6σ where K = | (standard center-average value) / (T / 2) |
And Cpk = 0 when K ≧ 1. This process capability Cpk means that the larger the numerical value is, the better the dimensional accuracy of the cutting width is, and it is evaluated according to the following criteria. Cpk> 1.33… Process capability is sufficiently satisfied (recommended value) 1.00 <Cpk ≦ 1.33… Process capability is available but caution is required for management Cpk ≦ 1.00… Process capability is insufficient

In the cutting test results of the 96% alumina green sheet in Table 1 below, in any of the first to third embodiments, the process capability Cp is significantly improved as compared with the conventional one, and particularly, the thickness 0. With a 30% 96% alumina green sheet, the process capability Cpk exceeds the recommended value of 1.33 by the cutting method of the first embodiment (smooth plate) and the third embodiment (smooth plate + roller), which is sufficient. It was confirmed to have process capability. In addition, a 96% alumina green sheet with a thickness of 0.05 mm is also used in the third embodiment (smooth plate + roller).
It was confirmed by the cutting method of No. 1 that the process capability Cpk exceeds the recommended value of 1.33, and the process capability is sufficient. In this case, the greater the process capability Cpk is, the smaller the difference between the set width and the cut width dimension is, so that the next process is easily set and the number of setting steps can be reduced.

Also, in the cutting test results of the paper and PET film shown in Table 2 below, the process capacity Cp is significantly increased as compared with the conventional one, and the cutting method of the third embodiment (smooth plate + roller) is used. It has been confirmed that the capability Cpk exceeds the recommended value of 1.33 and that the process has sufficient capability.

[0029]

[Table 1]

[0030]

[Table 2]

The slitter device of the present invention may cut sheet-like objects other than the ceramic green sheet, paper, and PET film, and the rotary blade 2
It is also possible to arrange three or more sets of 2 and 23 so that the sheet-like object to be cut can be cut at three or more places at the same time.

[0032]

As is apparent from the above description, the slitter device according to the first aspect of the present invention is arranged so that the slack of the sheet-shaped cut object is close to at least one of the upper and lower sides of the sheet-shaped cut object to be cut. Since the slack prevention means for pressing is arranged, it is possible to cut with high dimensional accuracy while preventing slack in the sheet-shaped object to be cut without applying tension to the sheet-shaped object to be cut. Can be cut with dimensional accuracy.

Further, in the present invention, since the slack preventing means is constituted by the smooth plate horizontally installed along the sheet-like object to be cut, the slack preventing means is extremely simple in construction and the slack preventing means is installed. It requires very little space and cost.

Further, in the third aspect, since the slack preventing means is constituted by the roller rotatably installed in the feeding direction along the sheet-shaped object to be cut, not only the slack preventing means has a simple structure. Since the roller rotates in association with the feeding of the sheet-shaped cut object to be cut, the sheet-shaped cut object can be cut with high dimensional accuracy while preventing damage to the sheet-shaped cut object, and deterioration in quality can be suppressed.

Further, in the present invention, since the smoothness of the ceramic green sheet to the carrier film surface side can be prevented by the smoothing plate and the slackening to the other surface side (ceramic surface side) can be prevented by the roller, it is easily scratched. It is possible to cut with high dimensional accuracy while preventing the ceramic green sheet from slacking up and down without damaging the ceramic surface.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view (a) and a plan view (b) showing a slitter device used in a first embodiment of the present invention.

FIG. 2 is a vertical sectional front view (a) and a plan view (b) showing a slitter device used in a second embodiment of the present invention.

FIG. 3 is a vertical sectional front view (a) and a plan view (b) showing a slitter device used in a third embodiment of the present invention.

FIG. 4 is a vertical sectional front view showing a conventional slitter device (a).
It is a top view (b).

[Explanation of symbols]

21 ... Sheet-shaped cut object (ceramic green sheet), 22, 23 ... Rotating blades, 26 ... Smooth plate (slack preventing means), 27 ... Roller (slack preventing means).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor ▲ Shinji Hara 2701-1 Iwakura, East branch, Omine Town, Mine City, Yamaguchi Prefecture Sumitomo Metal Ceramics Co., Ltd.

Claims (4)

[Claims] 1. A slitter device for feeding a sheet-shaped object to a plurality of sets of rotary blades, which are opposed to each other at a predetermined interval, and cutting the sheet-shaped object to be a strip in a constant width along the feeding direction, A slitter device is provided between the plurality of sets of rotary blades, and is provided with slack prevention means that is close to at least one side of the upper and lower sides of the sheet-shaped cut object and that suppresses the looseness of the sheet-shaped cut object. 2. The slitter device according to claim 1, wherein the slack prevention means is composed of a smooth plate horizontally installed along the sheet-shaped object. 3. The slitter device according to claim 1, wherein the slack prevention means is constituted by a roller that is rotatably installed in the feeding direction along the sheet-shaped object to be cut. 4. A slitter device suitable for cutting a ceramic green sheet formed on a carrier film, wherein the loosening prevention means is installed horizontally along a surface of the ceramic green sheet on the carrier film side. 2. The slitter device according to claim 1, comprising a smooth plate and a roller rotatably installed in the feeding direction along the other surface of the ceramic green sheet.