JP2007160932A - Method and apparatus for controlling position of web and corrugated cardboard with unprocessed deckle edge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for controlling a position of a web and a corrugated cardboard with an unprocessed deckle edge for improving manufacturing precision since waste paper is not optimally used because of an imprecise manufacturing process. <P>SOLUTION: A method and an apparatus are provided for preferably controlling a position of one or more webs, particularly a web in paper or paperboard form used in manufacturing a corrugated cardboard and a corrugated cardboard with an unprocessed deckle edge, wherein in order to control the position of the web by a position operating device, position information detected downstream by a position detection means is used. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method and apparatus for controlling the position of one or more sheets of paper, in particular paper or paperboard, and is preferably used for producing corrugated paper and corrugated paper with unprocessed ears. .

  The basic structure of a prior art facility for producing corrugated paper is shown in FIG. The facility consists of a group of one or more single facers each joining a flat web and a corrugated web. The webs joined as described above are called single-sided webs. In joining and laminating, a single-sided web and a front liner web are joined and laminated into a single web. After laminating, the web passes through the heating and drawing area. Here, the web is heat-dried. In the final step, both ends of the corrugated paper web are cut, further cut into a desired format as necessary, and conveyed to a storage location.

  In manufacturing with known equipment, the used paper is not optimally utilized because the manufacturing process is not precise.

  In view of the above, an object of the present invention is to improve manufacturing accuracy.

  According to the present invention, the above object is achieved by a method, apparatus and corrugated paper according to the independent claims of the present invention. Preferred embodiments are described in the dependent claims.

  According to the present invention, there is provided a method for controlling the position of one or more sheets of paper, in particular paper or paperboard. Here, the paper web particularly relates to a paper web or a paper web, but may also relate to a paper web made of cloth, a paper web made of plastic, and a paper web made of metal. The web is composed of one or more layers of single or different material base paper. The method and apparatus of the present invention is particularly suitable for the type of web used in the manufacture of corrugated paper. In this connection, a single-sided web refers to a web consisting of two layers of raw material, one flat and the other corrugated.

  According to one aspect, the present invention relates to optimization of web control. Optimal position control is desired in both the production of a single-sided web and the bonding of multiple single-sided papers to a front liner web. If the paper webs are particularly well aligned when they are joined together, the generation of fragments can be reduced. Therefore, according to the present invention, the first position detection means detects first position information relating to one or more sheets located downstream of the one or more position operation devices. Then, the position of the web is controlled by the position operation device using the first position information detected downstream.

  Preferably, the position of one web page is treated as a reference parameter for controlling the other web page, and the predetermined parameter provides the desired relative position of the other web sheet to one web page. The center of the web and / or one or both ends of the web serve to determine the position of the web. In many installations, the center of the web serves to determine the location of the web, and the location of the web is located relative to the center of the machine.

Furthermore, the second position detection unit may detect second position information regarding one or more sheets of paper in the region of the position operation device. This makes it possible to acquire information regarding the place where the control is performed and the place operated based on the control, thereby enabling more precise position control. Therefore, the dynamic characteristics of the web may be taken into account in position control.

Furthermore, the second position information, in particular its change, is used to control the position manipulating device of one or more of the other webs, in particular to reduce misalignment between the webs. This not only allows the one web to be controlled to the desired position without taking the other web into account, but also allows the webs to be aligned with each other. This results in many advantages. For example, it is not necessary to take into account the data acquired downstream for one paper web, ie the web web, which generally results in less accurate web control but a cheaper web web it can.
Furthermore, for example, in the bonding of a plurality of paper webs, the position of each paper web is extremely important. If all webs are bonded together on one side, the side does not need to be cut or cut later, saving material stock. Such a product newly provided by the present invention is called an unprocessed ear. In production, as long as the webs do not move up and down with respect to each other, the positional variations of all webs are easy to manage. If there is no significant relative variation, it can be further processed with unprocessed ears. Preferably, the second position information relates to a web for the front liner that is used to control the position of one or more other webs.

  The control may take into account the speed and distance of the web applied to the controlled web between the position manipulator and the position detection means. As a result, control dead time can be taken into account, and control accuracy is greatly improved.

  The detection of the first position information by the first position detecting means is performed in the bonding area after the bridge, particularly in the preheater or glue application apparatus area, or immediately before the bonding. That is, the position detection is performed after the bridge where the position operation means is arranged. The position information is detected only for one or more sheets as necessary. This also applies in the control of one or more position manipulating devices. The web may be controlled using either its own information obtained downstream, or information obtained from one or more other webs, or alternatively using them.

  Alternatively, detection of the first position information by the first position detection means may be performed in the area of the preheater, and detection of the third position information by the third position detection means is performed in the area of the glue application device. Also good. As a result, information on at least two positions of one or more paper webs can be acquired, and the dynamic characteristics of the apparatus can be considered more appropriately. Thus, the first position information and the third position information may be used to control the position operation device.

  The position manipulating device is arranged upstream of the preheater area, in particular on the bridge.

  As an alternative or in addition, the first position detection means is arranged in the joining area of the two material base paper layers, in particular in the area of the corrugated roller. The one or more position operation means are preferably arranged upstream of the material base paper layer heater and / or the material base paper layer humidifier.

  By controlling the material base paper layer according to the first position information, the position of both base material layers relative to each other is optimized. In particular, they are optimized by being centered on each other and overlapping, or one side edge overlapping each other. This is important for processing with unprocessed ears.

  Preferably, the position control of the web is such that the position manipulating device is controlled so that the position of the web is exactly overlapped at one side edge, in particular without having to cut the side edge later.

  An optical sensor, a camera, a CCD camera, an ultrasonic device, or a piezoelectric element using ultrasonic waves may be used as the position detection means. In particular, the present invention is applied to corrugated board equipment for producing corrugated paper, for example, having 1 to 5 single facers.

  According to a second aspect of the invention, the web width of at least one paper web is measured at a plurality of positions in the corrugated paper manufacturing process. Depending on the arrangement of the respective measurements for measuring the web width, a position detection means or another width measuring device may be used. Instead of or in addition to the width measurement, the web humidity may be measured. The acquired width and humidity information is used to determine, for example, the shrinkage factor, i.e. the relationship between one width and the other, in a particular manufacturing part or in the entire manufacturing process. You may use the said information for the humidification control for aiming at the better stability of a process. Further, the acquired shrinkage coefficient may be used for quality judgment of used paper.

  The width of the first web and / or the humidity of the first web is preferably measured after unwinding from the feed roller. At this point, the base paper still has the same width and humidity as the original, and has not yet been humidified or joined to another web. Therefore, the value determined here is used as a reference value in determining the overall shrinkage coefficient. Since all the paper feeding rollers can measure at the above position, it is useful to use the average value of the width and humidity measured in this way.

  Furthermore, the width of the second web and / or the humidity of the second web may be measured after the single-sided cardboard is manufactured. In particular, the accuracy of joining may be determined using the width of the first web and the width of the second web.

  Further, the width of the web and / or the humidity of the web may be measured before laminating and / or before the heating / drawing area immediately after laminating and / or before the first cutting of the web. Each single process such as humidification, drying, or heating may be controlled using the coefficient for each region thus obtained. You may utilize the measurement before a 1st cutting with the measurement after unwinding for the calculation of the coefficient of the whole process, for example, the shrinkage coefficient of the whole installation.

  Furthermore, the width of the web before bonding and the width of the web before the first cutting of the web are used to determine the accuracy of joining and / or overlapping.

  A further aspect of the present invention relates to the joining and bonding of corrugated board manufacturing equipment comprising the apparatus according to the invention. Equipment for producing corrugated paper may further comprise one or more single facers, and / or a heating / drawing area, and / or a final process.

  The principles of the present invention may be used not only for position control, but also for tension control of the web. With respect to position control, all aspects disclosed herein or in the claims may be utilized for tension control of the web.

  For paper web tension control, the position detection means is specifically replaced by a tension sensing roller or modified to detect the web tension. The position manipulating device is replaced or modified so that the web tension can be manipulated.

  Optimum web tension control is desirable both in the production of single-sided webs and the joining of multiple single-sided webs and front liner webs. For this purpose, in the present invention, first web tension information relating to one or more paper webs located downstream of the one or more paper web tension operating devices is detected by the first web web tension detecting means. Then, using the first web tension information detected downstream, the web tension control is performed by the web tension operating device.

  Further aspects and advantages of the present invention will become apparent from the detailed description of the accompanying drawings.

  FIG. 2 is a schematic diagram of a single facer group. The corrugated paper manufacturing facility may be provided with one or more single facers.

  The functions and basic configuration are all similar. Paper or paper-like base paper is disposed on the paper feed roller 1. The paper feed rollers 1 are always arranged in pairs, the base paper is unwound from one roller, and the other roller is in a state that can be switched at any time. When the base paper of one roller is cut, the paper is spliced to the other roller at position 2 so that paper feeding is not interrupted. From here, the paper is sent to the first base paper storage location 3. The paper is stored here to compensate for the delay in paper supply when splicing from one roller to the other. In order to adjust the storage amount of the storage location 3, the pulleys located on the left and right of the storage location can be brought closer to or away from each other.

  From the first storage location 3, the paper passes through the position operation device 4 and is conveyed to the width and / or humidity detection means 10. The width and / or humidity detection device 10 detects a value in the original shape of the paper web. After the position manipulating means 4, the paper passes through a roller, where it is heated, in particular by a roller from which hot steam emerges. In addition, the paper is humidified during its transport to improve ductility and so that the two paper layers are later firmly joined.

  The web conveyed from one side passes through the corrugated roller 5 and is formed into a corrugated shape. The paste application device 6 applies the paste to the paper web. A second web is fed from the other side and bonded to the corrugated web to form a single-sided web. Position detection means 7 and width and / or humidity detection means 11 are arranged in the area where both paper sheets are bonded. The position detection means 7 detects the position of both webs and / or the relative position of the webs to each other. This information is used in various ways for controlling the position operating device 4. For example, it may be used to control one or both webs to the correct joining position, or to control one web to be accurately aligned with the other web. Preferably, one web is controlled to be placed in a predetermined position, and the other web is aligned with the first web. The paper web is controlled so that one side edge of both webs accurately overlaps for processing with unprocessed ears, i.e. without cutting or cutting one side edge.

  For the humidity control, the width and / or humidity detection means 11 is arranged in the region of the corrugated roller 5. This controls the humidity of each web and thus maintains and controls the lamination conditions.

  The manufactured single-sided web is transferred to the bridge 8. Here, a second storage, so-called bridge storage 9, is arranged. It serves to supply a single-sided web for later processing. In general, the production of a single-sided web is slowed down due to storage, that is, the paper splicing is performed slowly when the paper splicing is performed from one supply roller 1 to the other supply roller. While this speed is decreasing, the bridge reservoir 9 serves to supply a single-sided web so that the manufacturing process can be continued at a speed of about 100-400 meters per minute. After being spliced to the other roller, the replenishment of the bridge reservoir 9 causes the production speed of the single-sided web to exceed the average.

  The position detection means and / or the width and / or humidity detection means 12 are arranged at the end of the bridge reservoir 9. Here, further data regarding process control and optimization is obtained. In particular, here, information on bridge storage is also acquired.

  FIG. 3 shows a schematic view of the joining, laminating and heating / drawing areas. One or more single-sided webs are guided here. The position operation devices 15 and 16 control the position of the single-sided web and the necessary web tension. From the front liner layer supply roller 13, the front liner layer is guided to the position operation device 14 through the storage location. The width and / or humidity detection means may be arranged in front of the position operating device 14 to detect the width of the front liner web and its humidity.

  After the position operation devices 14, 15, 16, the web is sent to the bonding 21 through the preheating machine 17 and the glue application device 19, where the web is joined. Here, it is desirable that the positions of the webs be adjusted as precisely as possible. If the paper webs are closely overlapped and bonded to each other at one side end portion, the processing can be performed with unprocessed ears. Alternatively, all webs may be centered on each other. In any case, it is clear that the position of the web at the bonding point is the most important, so that the final position operating devices 14, 15, 16 are also arranged in front of the preheater 17. The position manipulating device cannot be disposed near the bonding for structural reasons. Therefore, the place where the final position control can be performed is far away from the bonding 21. Therefore, the present invention includes position detection means 18 and 20 so that information regarding the position of the web can be acquired at a position substantially close to the bonding. Only one of the position detecting means 18 and 20 may be attached as necessary. For example, it is not necessary to measure all the webs only by measuring after the glue applying device 19. The information acquired by the position detection means 18 and 20 is used for controlling the position operation devices 14, 15 and 16.

  Here, different utilization methods of the information acquired by the position detection means 18 and 20 are conceivable. Each paper web may be captured individually and controlled at an arbitrary position. Accordingly, the deviation from the value at the position measured by the position detection means 18, 20 is used as a reference value for controlling the position operating devices 14, 15, 16.

  Alternatively, a web, especially a front liner web, may be used as a reference. The position of the other web is controlled relative to the web. Further, the information obtained regarding the reference web may be used to track and control the other web or to supplement the dynamic properties of the reference web.

  Dynamic characteristics can be taken into account when measuring simultaneously, in particular in the area of the preheater 17 and in the area of the glue applicator 19. Further, the position operation devices 4, 14, 15, 16 themselves may be provided with position detection means.

  When using the information acquired from the position detectors 18 and 20, not only the distance applied to the web but also the speed of the web is considered between the position operating devices 4, 14, 15 and 16 and the measurement location. The Further, dead time and attenuation may be set.

  Width and / or humidity detection means may be used in addition to or instead of the position detection devices 18,20. Thereby, the desired humidity of the web is secured in the bonding 21. Furthermore, all the widths may be measured before the bonding 21.

  After bonding 21, the web is dried in the heating / drawing area. Within the zone, a circulating belt takes up the web, which is then guided to the heating element. The paperboard is dehumidified by heating and dried.

  FIG. 4 is a schematic diagram of the final process. After the heating / drawing area 22, another width and / or humidity detecting means 23 is arranged. The measured humidity is used to control the amount of heat used in the heating / drawing area 22. The measured width, together with the width value measured after unwinding, is used to calculate the shrinkage factor in the overall manufacturing process. Thereby, the quality state of the used paper is obtained. Further, the value measured here may be used for determination of position adjustment in the bonding 21 and for improving position adjustment as necessary. Therefore, the paper board of the paperboard at the measurement position after the heating / drawing area 22 is not so wide as the paper board in a single state before the bonding 21. Further, the shrinkage coefficient of the heating / drawing area 22 may be acquired.

  The web is sent to the first cutting 24. Usually the edge of the web is cut or cut here. In the present invention, it is possible to operate with an unprocessed ear. In this case, it is only necessary to cut one side edge of the corrugated paper. This progressive device does not necessarily work with a raw ear. In a further step, the web is cut into two pieces in a desired size in the vertical or horizontal direction and transported to a storage location schematically shown on the right of FIG.

Schematic external view of corrugated paper production facility Schematic of single facer group of corrugated paper manufacturing equipment according to the present invention Schematic of joining, laminating and heating / drawing area according to the present invention Schematic of the final process according to the present invention

Claims (50)

A method for controlling the position of one or more sheets of paper, in particular a paper or paper board,
First position detection means (7, 18, 20) detects first position information relating to one or more sheets located downstream of one or more position operation devices (4, 14, 15, 16). And steps to
Controlling the position of one or more paper webs comprising the step of controlling the position of the paper webs by the position operating device (4, 14, 15, 16) using the first position information detected downstream. Method.   The position control method according to claim 1, wherein a desired relative position of the other web is given by a predetermined parameter using the position of one web as a reference value for controlling the other web.   The position control method according to claim 1 or 2, wherein the center of the web and / or one or both ends of the web are used for determining the position of the web.   The further second information about the 1 or more sheet | seat in the area | region of the said position operation apparatus (4, 14, 15, 16) is detected by the 2nd position detection means as described in any one of the said Claims Position control method.   Further second position information, in particular its change, controls the position manipulating device (4, 14, 15, 16) of one or more of the other paper sheets, in particular reducing the mutual displacement of the paper sheets. The position control method according to claim 1, wherein the position control method is used.   The position control method according to claim 5, wherein the second position information is related to a front liner sheet which is a basis for position control of one or more of the other sheets.   The control is performed between the position operating device (4, 14, 15, 16) and the position detecting means (7, 18, 20) by controlling the speed and distance of the web applied to the controlled web. The position control method according to claim 1, wherein the position control method is considered.   The detection of the first position information by the first position detecting means (18, 20) is performed in the region of the bonding (21) after the bridge (8), in particular, a preheater (17) or glue application. A position control method according to any one of the preceding claims, performed in the region of the device (19) or immediately before the bonding (21). Detection of the first position information by the first position detection means (18) is performed in the area of the preheater (17),
The position control method according to any one of claims 1 to 8, wherein detection of the third position information by the third position detecting means (20) is performed in a region of the glue application device (19).   The position control method according to claim 9, wherein the first position information and the third position information are used to control the position operating device (4, 14, 15, 16).   The position control method according to any one of the preceding claims, wherein the position operating device (14, 15, 16) is arranged upstream of a region of the preheater, in particular on the bridge.   The position control method according to claim 1, wherein the first position detecting means (7) is arranged in a region where two material base paper layers are joined, particularly in a region of the corrugated roller (5).   The position control method according to one of claims 1 to 7 or 12, wherein the position operating means (4) is arranged upstream of a material base paper layer heater and / or a material base paper layer humidification.   By controlling one material base layer based on the first position information, both of the base material layers relative to each other, in particular so that the centers overlap each other or one side edge overlaps each other. The position control method according to claim 1, wherein the position is optimized.   The step of controlling the position of the web is such that, on one side, the position of the web (4, 14, 15. A position control method according to any one of the preceding claims, comprising controlling 15,16).   The position control method according to any one of the preceding claims, wherein an optical sensor, a camera, a CCD camera, an ultrasonic device, or a voltage element using ultrasonic waves is used as the position detection means (7, 18, 20).   A position control method according to any one of the preceding claims, applied in equipment for producing corrugated cardboard, in particular multilayer corrugated paper.   A method according to any one of the preceding claims, in particular wherein the width of at least one paper web is measured at a plurality of points in the process of producing corrugated paper.   The method according to claim 18, wherein the width of the first web and / or the humidity of the first web is measured after being unwound from the feed roller.   After the production of single-sided corrugated paper, the width of the second web and / or the humidity of the second web is measured, in particular using the width of the first web and the width of the second web, 20. The method of claim 19, wherein is determined.   The width of the web and / or the humidity of the web is determined before the laminating and / or before the heating / drawing area (22) immediately after the laminating (21) and / or the first cutting of the web. 21. A method according to one of claims 18 to 20, measured before (24).   The shrinkage factor is the width of the web and / or the humidity of the web before the first cutting (24) of the web, and the width of the first web and the humidity of the first web The method of claim 21 determined from:   The width of the web before the pasting and the width of the web before the first cutting (24) of the web are used to determine the accuracy of joining and / or alignment. The method of claim 21.   A corrugated paper manufactured using the method according to any one of claims 1 to 23.   Corrugated cardboard with unprocessed ears with either side of the paper webs stuck together.   At least one position operating device (4, 14, 15, 16) and first position detecting means (7, 8, 20) disposed downstream of the position operating device (4, 14, 15, 16); And at least one position operating device (4, 14, 15, 16) is one that considers position information data acquired downstream by the first position detecting means (7, 18, 20). A position control device for the above-described paper web, particularly a paper-like or paper-board paper web.   27. A device wherein the position of one web is used as a reference value for controlling the position of the other web and predetermined parameters provide the desired relative position of the other web. Position control device according to   28. The position control device according to claim 26, wherein the center of the web and / or one or both ends of the web are used for determining the position of the web.   29. The device according to claim 26, wherein further second position information relating to one or more sheets in the region of the position operating device (4, 14, 15, 16) is detected by a second position information detecting means. The position control device according to one item.   In order to control the further second position information, in particular its change, the position manipulating device (4, 14, 15, 16) of one or more of the other webs, in particular the displacement of the webs relative to one another. 30. The position control device according to claim 26, wherein the position control device is a device used for reducing the frequency.   31. The position control apparatus according to claim 30, wherein the second position information is an apparatus related to a front liner sheet that controls the position of one or more of the other sheets.   Control between the position operation device (4, 14, 15, 16) and the position detection means (7, 18, 20) in consideration of the speed and distance of the web applied to the controlled web 32. The position control device according to claim 26, wherein the position control device is a device that performs the operation.   Detection of the first position information by the first position detecting means (18, 20) is performed in the region of the bonding (21) after the bridge (8), particularly in the preheater (17) or the glue applying device (19). The position control device according to any one of claims 26 to 32, wherein the position control device is a device that is performed in the region of) or immediately before the bonding (21). Detection of the first position information by the first position detection means (18) is performed in the area of the preheater (17),
34. The position control device according to claim 26, wherein detection of the third position information by the third position detection means (20) is performed in an area of the glue application device (19).   The position control device according to claim 34, wherein the first position information and the third position information are devices used for controlling the position operating device (4, 14, 15, 16).   36. Position control device according to one of claims 26 to 35, wherein the position operating device (14, 15, 16) is a device arranged upstream of the preheater region, in particular on the bridge.   33. Position control according to one of claims 26 to 32, wherein the first position detection means (7) is a device arranged in the joining region of the two material base paper layers, in particular in the region of the corrugated roller (5). apparatus.   The position control device according to one of claims 26 to 32 or 37, wherein the position operating means (4) is a device arranged upstream of the material base paper layer heating and / or the material base paper layer humidification.   By controlling one material base paper layer based on said first position information, the positions of both material base paper layers relative to each other, in particular such that the centers overlap each other or one side edge overlaps each other. The position control device according to any one of claims 26 to 32 or 37 to 38, wherein the position control device is an optimized device.   40. Position control device according to one of claims 26 to 39, wherein the position of the web is exactly overlapped with each other on one side, in particular it is not necessary to cut the side later.   41. The apparatus according to claim 27, wherein the optical sensor, the camera, the CCD camera, the ultrasonic device, or a device using a piezoelectric element using ultrasonic waves is used as the position detecting means (7, 18, 20). Position control device.   The position control device according to any one of claims 26 to 41, wherein the position control device can be used in an equipment for producing corrugated paper, particularly for producing multilayer corrugated paper.   The width of the web and / or the humidity of the web is determined before the lamination and / or before the heating / drawing area (22) immediately after the lamination (21) and / or the first cutting of the web (24 43. The device according to one of claims 26 to 42, in particular a device measured before).   44. Apparatus according to claim 43, wherein the width of the first web and / or the humidity of the first web is measured after being unwound from the feed roller.   After the production of the single-sided corrugated paper, the width of the second web and / or the humidity of the second web is measured, in particular the width of the first web and the width of the second web is the accuracy of the joining. 45. The apparatus according to claim 44, wherein the apparatus is used for determination of an error.   The width of the web and / or the humidity of the web is determined before the laminating and / or before the heating / drawing area (22) immediately after the laminating (21) and / or the first of the web. 46. Apparatus according to one of claims 43 to 45, wherein the apparatus is measured before cutting (24).   The shrinkage factor is the width of the web and / or the humidity of the web before the first cutting (24) and the width of the first web and / or the humidity of the first web of the web. 47. The device of claim 46, wherein the device is determined based on.   The width of the web before the laminating and the width of the web before the first cutting (24) of the web is used in the apparatus used to determine the accuracy of joining and / or alignment 47. The apparatus of claim 46.   49. Equipment for producing corrugated paper, wherein the joining and laminating comprises the apparatus according to one of claims 26 to 48.   50. The equipment for producing corrugated paper according to claim 49, further comprising one or more single facers and / or a heating and drawing area (22) and / or a final process.

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