KR860001609B1 - Method of adjusting the format of continuous aqueous fiver suspension layers delivered by the head boxes of a paper manufacturing machine and the device for carrying out said method - Google Patents

Abstract

The brim of a paper web(4) formed in single or multiple layers from aqueous fiber suspension ejected through an opening(2) of a head box(3) is separated and collected on a porous travelling wire(1) of a paper mill by cutting the brim with a blade95) located in a direction longitudinal to the web and receiving the cut brim with transportation devices (11),(12),(13) and a conduit (8) having several walls. The width of the cut web is controlled by manipulating the direction of (5) with devices (16),(17),(13), (19).

Description

Apparatus and method for cutting the edges of paper webs from paper machines

1 is a side view of a device designed according to the principles of the present invention;

2 is a plan view of the apparatus shown in FIG.

3 is an enlarged view of a part of the apparatus shown in FIG. 1;

4 is a diagrammatic view of a paper machine with one edge trimmed while multiple layers of webs are being molded.

* Explanation of symbols for main parts of the drawings

2: slender gap 3: headbox

5: blade

TECHNICAL FIELD The present invention relates to a paper machine, and relates to an apparatus and a method for separating an edge of a paper web on a traveling wire through a paper web formed of a single layer or a plurality of layers.

In papermaking, the material of a paper web or sheet is a suspension fibrous material, which is formed by forming a single layer or a plurality of layers on a traveling wire. In general, the replenishment fee is the extraction of fiber from wood or other vegetables, which is a suspension that exits the long, narrow opening of the headbox located along the running wire and is placed on the running wire. Paper formed in this way has longitudinal edges incomplete and irregular in shape. Therefore, the edges must be regularly placed after being placed on the traveling wire in the headbox. To do this, water jets are often used. The removed portions are collected in ducts and mixed with other materials.

There are several irrationalities in the method and apparatus for regularizing web edges described above. Firstly, even with the method described above, not only does the edge not have a perfect shape, but the collected parts are not restored to the original material. This is because the web from the headbox can be separated from the edge of the web by a single operation of a distant edge forming device.

Moreover, when the web has multiple layers, the fibers of each layer are different in shape and quality from each other. In other words, the shear strength and softness of each layer are not uniform when the multi-layer web is manufactured. If the edges are removed in multiple layers, they cannot be used to make webs (layers) by mixing with the fibers. It is almost impossible to remove the fiber after the refining agents have been mixed. These papers also have very limited uses.

It is an object of the present invention to provide a method and apparatus for trimming the edges of a single layer or multiple layers of webs from a headbox and to make all the edge trimmings reusable.

Another object is to supply a device for arranging web edges that can be connected to the headbox and a device for removing the edges in advance before the web is molded.

It is an object of the present invention to provide a method for arranging each edge of a single layer or multiple layers of paper webs placed on a circulation progress wire of a paper machine, wherein each layer of paper webs passes through a long elongated gap in the headbox. As the web exits the gap, it cuts one edge with a blade, which is cut into the collector by a stage.

In addition, the present invention can adjust at least one layer (ply) of the width of the web on the traveling wire. Such a device is characterized by a blade fed to the headbox which is capable of breaking at least one of the edges of the web. A vehicle is provided for collecting the cut edges into the collector.

Other objects and features of the present invention do not depart from the spirit and spirit of the present invention in connection with the selected embodiment of the present invention.

In continuous web making machines, porous continuous wires (1) are supplied in FIGS. 1 and 2 to form webs, which are arranged to accommodate a single layer or multiple layers of fibrous material, usually suspensions of wood fibers. It is.

Each layer is continuously supplied in a narrow gap with an appropriate amount of replenishment fee, ie distributed in the gap 2 of the headbox 3. The narrow gap 2 is arranged above the traveling wire so that the support fee coming out of the gap is ejected only by a predetermined amount and molded to a predetermined thickness on the traveling wire as shown in FIG.

The device of the invention is supplied with at least one thin blade 5 which is perpendicular to the face of the traveling wire and essentially perpendicular to the layer of paper exiting the gap. The front face 6 of the blade is very sharp and as shown in FIG. 3, the front end 7 of the blade projects toward the gap while contacting the upper and lower portions of the narrow gap.

When the web emerges from the gap 2, the blade is positioned at a predetermined position so that at least one of the edges of the web can be cut out with respect to the width of the web. The two blades 5 are usually located on both sides of the gap so that both edges of the web 4 can be cut out.

The apparatus also includes means for conveying the cut edge portion or regenerating means. These means can be assembled to the side wall to constitute the passage 8 shown in FIGS. 1 and 2.

These means consist of the upper wall and side wall surfaces 11, 12, 13, etc., as in FIG. 3, together with the lower wall which receives them when the cut edge 14 of the web is cut out of the web. A cross section is a rectangular passage.

The blade 5 is fixed to any one of the side walls 13 of the passage for convenience.

The passage constructed in this way is open toward the collection hopper 15 as shown in FIG. 1 and FIG. The collection hopper is placed in a pre-determined area to receive the cut web edge portions.

The means also have means for adjusting the position of the blade in the transverse direction of the machine to adjust the width at which the edge should be cut off. As shown in FIG. 3, this means is provided with a guide plane 16 which is fixed to the headbox 3 and the slide 17 is coupled to slide on the guide plane 16 and has walls ( 11) (12) (13) and the blade 5 are assembled at fixed angles. The slide 17 is fed to a slot 18 into which the body of the cap screw 19 is inserted. In addition to FIG. 2, the walls may be connected to the plate 20 and the bar 21 may be fixed to a predetermined position in the slot 23 in which the cap screw 22 is inserted.

Depending on the work, one or two head boxes 2 may be installed (indicated by reference numerals 30 and 31). These are the second layer 35 when the first layer 32 is placed directly on the traveling wire 1 when the web layers 32 and 35 that can be disposed along the traveling wire are distributed as shown in FIG. Is distributed as it is.

In accordance with the principles of the present invention, the edge dividing device 34 is arranged to cut the edge of the second layer. This device is connected to the headbox 31 and a similar device is connected to another headbox 30, either of which is supplied to the headbox 30 and not to the headbox 31. Do not. In the field of production, there are usually two or more headboxes for producing multiple layers of webs, and thus several edge separators 34 described above which are connected to the headboxes.

In the embodiment shown in FIG. 4, the web layer 35 is distributed to the headbox 31 over the web layer 32 distributed by the headbox 30. As soon as the web layer 35 leaves the gap, the edge is cut off by the blade of the device 34. In FIG. 3 the edges are both sides cut off in the main part of the web. The edges of the webs are irregular, and the main portion of the web has portions that are regularly cut on both sides and straight. The cut edge portions are conveyed to the regeneration area in a passage 8 constituted by side walls 11, 12, 13. The web is distributed on the already formed web layer 32.

Two layers of webs shaped in this way are generally passed through the area directed towards the direction in which the water jet 37 cuts off the web edges. Therefore, if the two layers are molded as different fibers, the cut fibers can be collected and recycled according to their kind. When forming several layers of webs, it can be set as a uniform straight line (edge).

In addition, when the first headbox 30 is supplied to the separator 34, the edges of the webs 32 and 35 distributed by the second headbox 31 will be even more regular. Thus, there is no need to use the water jet 37.

According to the present invention, no matter how many layers of webs are formed, the edges of the formed webs are not only clean and completely regular, but also the edges cut according to the respective physical and chemical properties can be reused even if the fibers of each layer are different.

From now on, methods and structures corresponding to the scope and spirit of the present invention will be elucidated.

Claims (10)

In the method for adjusting the edge of a paper web for forming the paper stock ejected from the slender gap 2 of the head box 3 on the porous running wire 1, the web 4 will emerge from the slender gap described above. A method of adjusting paper web edges, wherein the edges are cut out and the pieces of cut edges are collected together. 2. Method according to claim 1, characterized in that the blades (5) are arranged in the longitudinal direction of the web at a position to cut the edge of the paper web. 2. The first layer (32) of the paper web is placed on the traveling wire (1) and the second layer (35) is distributed over the first layer, where the position of the headbox is the first layer when cutting the edge. A paper web edge adjusting method, characterized in that the edge is arranged so that the edge is cut before being distributed on the layer. In the device for adjusting the edge of the web 4 and the edge on the advance wire 1, a thin blade 5 is parallel to the direction of the web. Extending from both sides so as to cut the edge of the web 4 and to cut the width of the web: conveying means 11, 12 for receiving the edges 4 of the web cut by the blade; Apparatus for cutting the edge of a web, characterized in that (13) is provided. 5. Device according to claim 4, characterized in that it comprises means for adjusting the position to the required position when arranging the blade (5) to intersect the paper web direction. 5. Device according to claim 4, characterized in that the means (11), (12), (13) for carrying the cut edge portion (14) comprise several wall passageways (8) for receiving it. 5. Device according to claim 4, characterized in that a thin gap (2) in the head box (3) is installed in one of the side walls of the head box. 5. Device according to claim 4, characterized in that the blade (5) is in contact with all of the slice lips which are one side of the narrow gap (2). In the device for cutting the edge of the web when the paper stock material ejected from the head box (3) is molded on the traveling wire (1), the blade means (5) is arranged in a direction intersecting the direction of the web (4) The edges are cut off while the device is going on and means for cutting the web edges are included, characterized in that it comprises means (11), (12), (13) for conveying the cut portion. 10. Apparatus according to claim 9, characterized in that blade direction adjusting means (16), (17), (13), (19) are included for adjusting the width of the portion to cut the web edge on the traveling wire (1). .

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