JPH0813379A - Production of paper roll with both cut end parts - Google Patents

Abstract

PURPOSE:To provide the subject method capable of producing paper roll suitable for diversified small-quantity production without causing a bar in the paper width of a product regardless of paper width of products from which both end parts are removed and irrespective of the order of production of these products. CONSTITUTION:In a series papermaking process, both end parts of a paper sheet are cut in a dryer part or behind the dryer part and before a calender part and the paper sheet is transferred to the calender part in a state of accompanying both the cut end parts and both the end parts are removed after the calender part to wind the paper sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper wrap for cutting both ears of a paper take-up machine before cutting a paper sheet made by a paper machine into a paper take-up form online. Tori's manufacturing method.

[0002]

2. Description of the Related Art When looking at a paper sheet as it is made, generally, both ears, that is, both ends in the width direction, are cut and removed in accordance with a predetermined take-up width of paper winding as a product. , Is collected by the waste paper pulper.

In recent years, in the paper manufacturing field, the needs of consumers have been diversified, and at the manufacturing site, various kinds of small lots have been dealt with, and it is often demanded to change the dimension in the width direction of paper winding. became. Since the final dimension of the width of the paper winding is done by the slitter of the winder, it is possible to cut both ears at that time, but from the viewpoint of reusing the cut off both ears, the paper machine It is more efficient to disconnect online with.

Conventionally, for this purpose, there has been seen an example in which a side run cutter having a pair of upper and lower blades is used and is installed between a machine calendar device and a reel device.

[0005]

When cutting both ears on-line with the above-described paper machine, the side run cutter is a system that cuts from both sides of the paper sheet by the upper blade and the lower blade. It is installed between the machine calendar device and the reel device mainly because of the increase in size and the restriction on the installation space.

However, since the paper sheet is crushed and stretched by the calendering device, the fluctuation in tension between the calendering device and the reel device is large, and the tension of the paper sheet changes depending on the strength of the calendering process. There is a problem that it is difficult to cut the part stably.

[0007]

According to the present invention, there is provided a method for producing a paper roll, in which both ears are cut, in a series of paper making steps, in a dryer part or after a dryer part and before a calender part. The two ears of the sheet are cut, but the paper sheet is continuously moved to the calendar part with the both ears cut, and after the calendar part, both ears are removed and the paper sheet is wound up. To do.
Further, when the both ears are cut, the water content of the paper sheet is 4 to 10% by weight. Further, the side run cutter used for cutting the both ears has a disc-shaped cutter knife having a saw-tooth shape, and cuts only from one side of a paper sheet. Further, the rotation direction of the cutter knife is opposite to the traveling direction of the paper sheet.

The present invention has a basic characteristic in the place of cutting both ears and the method of handling both ears after cutting, and includes paper stock, stock inlet, wire part, press part, dryer part, The calendar part and reel part are not particularly limited in their model, structure, and performance, and any combination is possible.

The calender part is composed of a paper machine and a machine calender that operates online. The main purpose is to reduce the thickness of the sheet to a required level to make the thickness uniform, and to wire marks and felts in the preceding process. The purpose is to level the marks and impart surface characteristics such as smoothness.

A device for cutting both ears is called a side run cutter. The location of this side run cutter is
During the drying step in the dryer part or after the drying step and before the surface treatment step in the calender part. At this installation location, the fluctuation of the tension of the paper sheet is small, so that the influence of fluttering is small. From this point of view, the most desirable installation location is the entrance of the dryer before the final dryer. At this point, the paper sheet is already close to the target water content and has a water content of 4 to 10% by weight, which is suitable for cutting both ears.

The cutter knife of the side run cutter is
You can use a sewing machine blade, but it is desirable to have a wave saw blade shape from paper dust and sharpness.If it is a wave saw blade shaped cutter knife, it is not necessary to make a pair of upper and lower cutter knives, as a single side cutting method with only the upper blade The installation space for the side run cutter can be reduced. Further, when the cutter knife is rotated in the direction opposite to the traveling direction of the paper sheet, the relative speed is increased and the sharpness is improved. Therefore, the rotational speed of the cutting blade may be 1000 m / min or more in peripheral speed.

[0012]

In the present invention, the side run cutter is installed in the dryer part during or after the drying process and before the surface treatment process in the calender part. At this installation location, the tension of the paper sheet is relatively high due to the influence of calendering in the next process, and since it is not affected by the elongation of the paper sheet because it is before calendering, there is little fluctuation in tension. It has the feature. Therefore, fluttering can be effectively suppressed in both ears where fluttering is likely to occur, and cutting work of both ears can be smoothly performed.

Further, according to the present invention, after cutting both ears by the side run cutter, the two ears are cut and are allowed to travel together with the paper sheet as if they were not cut. Finish the surface smoothing process in the calendar part. Then, when the surface smoothing process is completed, both ears are separated from the paper sheet and collected in a pulper. In this way, during the calendering process, the two ears of the paper sheet are not separated by separating them from each other by running them together with the paper sheet to be processed. That is, the paper sheet width during calendar processing is always constant. If the width of the paper sheet is narrow, abrasion of the roll surface accompanying the surface smoothing treatment of the paper sheet causes stepping due to the difference in abrasion between the place where the paper sheet passes and the place where it does not pass in the axial direction of the roll. However, if a paper sheet with a wider width than this is subsequently processed, the surface of the paper sheet will be damaged, but in the present invention, since the paper sheet is always processed with a wide width, the roll also has a wide step. Occurs, and there is no risk of scratching the surface of the paper sheet.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view showing main steps of a method for manufacturing a paper winding according to the present invention. In FIG. 1, during the papermaking process,
The stock inlet, wire part, press part and upstream part dryer part are not shown.
The paper sheet led to the upstream dryer part through each of the above steps has a water content of about 55 to 65% and is called a wet paper. The purpose of the dryer part is to dry the wet paper, and the paper sheet 1 is strongly resistant to a series of steam heating rolls 2a, 2b, 2c, 2d by a pair of upper and lower dryer felts 3a, 3b made of air-permeable fabric. It is pressed and dried efficiently.

In FIG. 1, the side run cutter 5 is
It is installed between the steam heating rolls 2b and 2c. At this point, the dryer felt 3a on the upper side is separated from the pressed paper sheet 1, inverted by the felt roll 4a, pressed again on the peripheral surface of the steam heating roll 2d, and then by the felt roll 4b. It is configured to return to the upstream side of the dryer part. This dryer felt is composed of a pair of upper and lower parts, and the lower dryer felt 3b is also constructed symmetrically with the upper part. The side run cutter 5 can cut only the paper sheet 1 traveling away from the dryer felt 3a. The side run cutter 5 is preferably installed in a place where the tension of the paper sheet 1 is large and stable. In this sense,
A cutter knife is installed so as to cut during the transition of the paper sheet 1 from one of the vapor cylindrical rolls to the next vapor cylindrical roll or the transition from the final vapor heating roll 2d to the calender part. The side run cutter 5 has one cutter knife at each end of the paper sheet 1 in the width direction in order to cut both ears of the paper sheet 1. The side run cutter can be installed at any position in the dryer part or after the dryer part and before the calendar part, but at the installation position of the side run cutter 5 shown in FIG. If so, the water content of the paper sheet is 4-10% by weight
In view of the ease of cutting and the beautiful finish, it is suitable for cutting. From the viewpoint of the water content of the paper sheet, the side run cutter can be installed at any position from the position of FIG. 1 to the midway of transfer to the calendar part.

The paper sheet 1 whose both ears have been cut runs integrally with the two ears as if the two ears were not cut when moving to the calender part which is the next step. , Still calendered as it is. The calendar part shown in FIG. 1 includes two high heat metal rolls 6
It is composed of a and 6b and two swimming rolls 7a and 7b, and is thinned to a predetermined thickness while passing through 3 nips.

After that, the both ears 10 are separated from the paper sheet 1, move on the peripheral surface of the swimming roll 7b, are peeled off by the scraping knife 12, and are dropped onto the pulper 11 for collected paper, and are recycled. It is a raw material for paper. As a separating means, the paper sheet 1 may be transferred to the reel part except the both ears 10 when the paper is passed.

In the reel part, the paper sheet 1 is wound around the reel spool 8 for winding, and the paper sheet 1 is supplied toward a nip formed between the reel cylinder 9 and the winding held by the reel spool 8. To do. The reel cylinder 9 is motor-driven by a load that gives a sufficient tension to the paper sheet 1 fed from the calendar part.

FIG. 2 is a front view showing an example of the side run cutter used in the present invention. The side run cutter 5 is
One unit is provided at each end of a main frame 25 provided in parallel with the width direction of the paper sheet 1. Less than,
The side run cutter on the right side of the drawing will be described.

A shaft 22 having a disk-shaped cutter knife 21 attached to its tip has two bearing units 23a and 23b.
Is supported by the drive motor 2 at the other end of the shaft 22.
It is connected to 4. The above bearing units 23a, 23b
Both the drive motor 24 and the drive motor 24 are fixed to a supporting plate 26. When the position adjusting handle 27 is rotated, the position moving shaft 28 communicating with the main frame 25 is rotated to rotate the supporting plate 26 at this position. Moving shaft 28
The support plate 26 engaging with can be slid along the main frame 25. Therefore, by turning the position adjusting handle 27, the position of the cutter knife 21 is adjusted so as to coincide with the cutting position corresponding to the cutting width n determined for each product with respect to the width m of the paper sheet 1. The cutter knife 21 can be accurately cut at the planned position of the paper sheet 1. The cutting position attaching / detaching actuator 29 causes the cutter knife 21 to move the paper sheet 1
This is for moving between the position for cutting into and the position for separating from the paper sheet 1, and when it is in the separating position, the cutting position can be adjusted and the cutter knife can be replaced while the sheet is still passing.

[0021]

According to the method of manufacturing a paper winding according to the present invention, in a series of papermaking steps, both ears are cut during the process of the dryer part or after the process of the dryer part and before the process of the calendar part. Therefore, the tension of the paper sheet is made uniform at this position, and a stable cutting operation can be performed. Further, since the cutting operation can be performed stably, the cutter knife cuts from only one side of the paper sheet as a wave-shaped disc-shaped cutting blade, thereby reducing the installation space. This cutter knife can obtain a relatively large peripheral speed by rotating in a direction opposite to the flow direction of the paper sheet.

Further, according to the method of the present invention, when the calender is used for processing, regardless of the change in the cutting position of both ears due to the change in the width of the final paper sheet with both ears dropped. The paper width, including both ears, does not seem to change.
For this reason, the step that occurs on the calender roll always remains wide, and even after manufacturing a product with a narrow take-off width, there is no problem such as scratching the surface of the paper sheet. A wide range of products can be manufactured. Even if the stepped position is slightly within the width of the paper sheet, it will be accommodated in both ears to be cut and removed.

Therefore, according to the present invention, since the products can be manufactured in any order irrespective of the paper width of the product, it is possible to manufacture the paper winding suitable for the production of a large variety of small lots.

[Brief description of drawings]

FIG. 1 is a schematic front view showing main steps of a method for manufacturing a paper roll according to the present invention.

FIG. 2 is a front view showing an example of a side run cutter.

[Explanation of symbols]

 1 Paper sheet 2a, 2b, 2c, 2d Steam heating roll 3a, 3b Dryer felt 5 Side run cutter 6a, 6b High heat metal roll 7a, 7b Swimming roll 8 Reel spool 9 Reel cylinder 10 Both ears 11 Pulper 25 Main frame 21 Cutter Knife 22 Shafts 23a, 23b Bearing unit 24 Drive motor 26 Support plate 27 Position adjustment handle 28 Position movement shaft

Claims (4)

[Claims] 1. A paper sheet produced from a stock material supplied to a stock inlet through a wire part and a press part is dried in a dryer part, and subsequently surface-treated in a calendar part, and then in a reel part. In a series of papermaking processes that are wound up, after cutting both ears of the paper sheet in the dryer part or after the dryer part and before the calendar part, with the cut ears of the paper sheet The method for manufacturing a paper roll with both ears cut, characterized in that the paper sheet is wound by removing both ears after the calendar part. 2. The water content of the paper sheet is 4 when cutting both ears of the paper sheet in the dryer part.
The method for producing a paper roll according to claim 1, wherein the content is 10% by weight. 3. The cutting of both ears of the paper sheet is performed by cutting only from one side of the paper sheet by using a side run cutter having a disc-shaped cutter knife having a wave saw shape. The method for producing a paper roll according to 1 or 2. 4. The method for manufacturing a paper roll according to claim 3, wherein the cutter knife is rotated in a direction opposite to a running direction of the paper sheet.