Adhesive application device for turn-up system of winding machine of fiber web production line, and turn-up system and method for winding machine for winding fiber web

Abstract

An adhesive application device (50) for a turnup system of a coiler of a fiber web production line, and a turnup system and method of a coiler for winding a fiber web, the adhesive application device comprising a melter (40) and an adhesive applicator (20), the adhesive applicator (20) comprising a nozzle (31), in the adhesive application device (50), the nozzle (31) being arranged in the melter (40), the nozzle (31) being arranged in the melter (40), the nozzle (31) being arranged in the melter (40), and the nozzle (31) being arranged in the melter (40). The melter (40) is connected to the adhesive applicator (20) via a feed channel (42) for providing adhesive to a nozzle (31) of the adhesive applicator (20). The melter (40) is a hot melt adhesive melter (40). The adhesive applicator (20) is a high pressure hot melt adhesive applicator (20) comprising an applicator head (21), a high pressure pump unit (22), a linear actuator (23) and a linear actuator mover (24), the high pressure pump unit (22) being driven by the linear actuator (23) and the linear actuator mover (24).

Description

Technical Field

[0001] This invention generally relates to the production of fiber webs and, particularly, to master rolls for producing fiber webs in a winding machine. The invention relates to adhesive application apparatus, turn-up systems, and turn-up methods. Background Technology

[0002] As is well known, fiber webs (such as paper webs or paperboard webs) are manufactured in multiple machines that together form a fiber web manufacturing line, which can be hundreds of meters long. Modern paper machines can produce more than 450,000 tons of paper per year. The speed of paper machines can exceed 2,000 m / min, and the width of paper webs can exceed 11 meters.

[0003] As is known from the prior art, fiber web production processes typically comprise a set of components formed by multiple pieces of equipment arranged sequentially in a production line. A typical production and processing line includes a headbox, a wire section, and a press section, followed by a drying section and a winding machine. The production and processing line may also include finishing equipment such as sizing machines and / or calenders and / or coating machines. The production and processing line typically also includes at least one slitting-rewinding machine for forming customer rolls, as well as roll packaging equipment.

[0004] In a fiber web production line, manufacturing is carried out as a continuous process. Finished fiber webs output from the machines are wound into master rolls (machine rolls) around a winding shaft (i.e., a spool) by a winding machine. The diameter of the master roll can be greater than 5 meters and the weight can be greater than 160 tons. The purpose of winding is to transform the fiber webs from their planar manufacturing form into a form that is easier to handle. At the winding machine located in the main production line, the continuous process of the production line is first interrupted, and thereafter the process continues in stages. Various attempts are made to interconnect these stages as smoothly as possible so that no work already performed is wasted. Therefore, winding machines are used in fiber web production to wind fiber webs from the fiber web production line into master rolls, but winding machines are also used to wind fiber webs from coating machines, calenders, or corresponding finishing devices.

[0005] Several drawbacks and problems may arise in known methods and systems for flipping: typically, associated with methods and systems known in the art, the equipment requires a large amount of space, making it difficult to find a cost-effective solution to enable the flipping system to perform flipping quickly and efficiently.

[0006] In a winding machine, a parent roll is formed around a winding shaft that operates as a core; that is, the fiber web on a parent roll has a beginning (i.e., the starting end) and an end (i.e., the tail). When the parent roll has been wound to its full diameter and is complete, a flip (roll change, parent roll change) is performed to end the winding of the completed parent roll and begin winding a new parent roll around a new winding shaft or similar core. During the flip, the fiber web is typically cut by one or two cutting devices, thereby forming a wedge-shaped tip, with the end (i.e., the tail) of the fiber web attached to the surface of the completed parent roll, and the beginning (i.e., the tip) of the fiber web attached to the new winding shaft. To attach the tail of the fiber web to the surface of the completed master roll and to attach the starting end to the winding shaft, it is known in the prior art that an adhesive (such as glue) is applied to the surface of the master roll or to the surface of the fiber web near the edge of the fiber web, and to the starting end of the fiber web, just before turning. For these purposes, multiple adhesive application devices are arranged in association with the turning system of the winding machine. One adhesive application device is provided for attaching the starting end to the winding shaft and another adhesive application device is provided for attaching the tail to the surface of the completed master roll.

[0007] In existing fabrication systems using hot melt adhesive, the container for the hot melt adhesive and the pump for pumping it to the adhesive nozzle are located on the side of the fiber web machine, necessitating long feed pipes from the container and pump to the adhesive nozzle. This extended distance between the hot melt adhesive container and the nozzle, and to the application point, causes the hot melt adhesive to cool before reaching the application point, which, for safety, leads to overheating. This overheating of the hot melt reduces its bonding properties.

[0008] In existing rollover systems, particularly those related to the winding of heavier fiber webs, adhesive application devices utilizing hot melt adhesives are employed. When adhesive is about to be applied through the adhesive application device, an application pulse is generated, applying the adhesive to the target surface by pressure. In adhesive application devices known in the prior art, controlling the adhesive dosage is challenging because the pressure rapidly decreases after the adhesive application pulse has begun. This results in uneven adhesive dosage within the application pulse, as a large amount of adhesive is applied at the start of the pressure drop, and the amount of adhesive applied gradually decreases towards the end of the application pulse as the pressure decreases. Uncontrolled adhesive dosage easily leads to rollover failure because both excessively high and low adhesive dosages interfere with the pickup of the starting end, thus causing failure in both pickup and attachment of the starting end to the winding shaft. Furthermore, hot melt adhesives are used for attaching the starting end to the surface of the winding shaft because high adhesion is required. Therefore, especially considering the achievement of high turnaround performance, there is a need for an adhesive application device that provides a fully controlled adhesive dosage at the starting end, as both excessively high and low adhesive dosages can interfere with pick-up and attachment at the starting end. If the adhesive dosage is too high, the adhesive diffuses beyond the edge of the starting end and prevents adhesion, thus preventing the fiber web from being picked up onto the winding shaft. If the adhesive dosage is too low, it is insufficient to adhere and attach the starting end to the winding shaft. In adhesive application devices known in the prior art, controlling the adhesive dosage is challenging because the adhesive application device rapidly loses its pressure after the start of the adhesive application pulse, and therefore, the adhesive dosage at the start of the application pulse is much higher than the adhesive dosage at the end of the application pulse. Fiber web production lines, paper or paperboard production lines with large basis weight and / or operating speed ranges are the most difficult cases because the adhesive dosage requirement varies depending on the production grade.

[0009] In existing rollover systems, attachment of the tail to the surface of the finished master roll is performed using a separate adhesive application device. This adhesive application device provides the attachment of the tail during rollover and thus provides surface bonding to the master roll. In adhesive application devices used for surface bonding of the master roll, the adhesive often dries and hardens on the nozzle tip, requiring regular inspection and maintenance. It is known from the prior art that tests have been conducted using hot-melt adhesives with adhesive application devices for surface bonding of the master roll; however, these tests have failed because after pickup and attachment at the starting end, no adhesive is left for surface bonding of the master roll due to the loss of pressure from the adhesive application device. To prevent the surface layer from loosening after rollover, the tail needs to be attached to the finished master roll (i.e., surface bonding of the master roll). Adhesive is applied when attaching the tail to the surface of the completed master roll. Adhesive application typically begins from the middle of the fiber web in the transverse direction. Therefore, it is important that the adhesive precisely covers the entire cross-sectional area of ​​the tail, even the final corners, to prevent loosening and detachment. Existing surface bonding systems are additional and separate adhesive application devices compared to the starting-end adhesive application device because different adhesives are used for both the starting-end and tail attachments.

[0010] Patent publication CA2636423C discloses a winding shaft for a fiber web winding machine, the winding shaft including at least one smooth surface area, the smooth surface area including at least the surface area of ​​the winding shaft, an adhesive material used in conjunction with the winding process in the winding machine for securing the ends of the web to begin winding a new web roll, is arranged to adhere to the surface area of ​​the winding shaft, and the smooth surface area is smooth such that the adhesive force of the adhesive material used in unwinding is sufficient to begin winding a new web roll, and the adhesive material can be easily removed after unwinding.

[0011] Patent publication EP1946846B1 discloses an adhesive application device for a machine processing paper or paperboard. This adhesive application device has multiple discharge modules distributed along a working width. Each discharge module has an adhesive flow connection and an adhesive return connection, an adhesive chamber located between the adhesive flow connection and the adhesive return connection, and a closable discharge opening located outside the adhesive chamber. The adhesive return connections of the multiple discharge modules are connected to a common return section. A pressure setting device is arranged in the return section, which generates pressure in the return section based on the pressure drop that occurs when all discharge openings are fully open. Summary of the Invention

[0012] The object of the present invention is to create an adhesive application device in which the problems and disadvantages of adhesive application devices for the flipping system of a winding machine in a fiber web production line known in the prior art are eliminated or at least minimized.

[0013] The specific object of the present invention is to provide an adhesive application device in which problems, particularly those related to attaching the starting end of the fiber web to the winding shaft of the winding machine during the flipping of the fiber web production line, are eliminated or at least minimized.

[0014] A specific object of the present invention is to create an adhesive application device for a turning system of a winding machine in a fiber web production line, wherein problems, particularly those related to unfavorable temperatures at the application point of the hot melt adhesive, are eliminated or at least minimized.

[0015] Another non-limiting object of the present invention is to create an adhesive application device for a tumbling system of a winding machine in a fiber web production line, wherein, in particular, problems related to the need for regular inspection and maintenance due to the adhesive drying on the nozzle tip of the adhesive application device are eliminated or at least minimized.

[0016] A particular, non-limiting object of the present invention is to provide an adhesive application device in which problems, particularly those related to the need for two separate adhesive application devices during the flipping of a winding machine, are eliminated or at least minimized.

[0017] The object of this invention is to create a flipping system for a winding machine in which the disadvantages of the prior art are eliminated or at least minimized.

[0018] The object of this invention is to create a method for flipping up a winding machine in which the disadvantages of the prior art are eliminated or at least minimized.

[0019] To achieve the above-mentioned objectives and those to be discussed later, the main features of the adhesive application device, lifting system, and lifting method according to the present invention are as follows.

[0020] According to the present invention, an adhesive application device for a tumbling system of a winding machine in a fiber web production line includes a melter and an adhesive applicator. The adhesive applicator includes a nozzle. In the adhesive application device, the melter is connected to the adhesive applicator via a feed channel for supplying adhesive to the nozzle of the adhesive applicator. The melter is a hot melt adhesive melter, and the adhesive applicator is a high-pressure hot melt adhesive applicator, which includes an applicator head, a high-pressure pump unit, a linear actuator, and a linear actuator moving part. The high-pressure pump unit is driven by the linear actuator and the linear actuator moving part.

[0021] According to an advantageous feature, the linear actuator moving part is a servo drive. The linear actuator moving part can also be a hydraulic drive.

[0022] According to the invention, the applicator head is configured to apply a hot melt adhesive for attaching the starting end of the fiber web during the winding process. An advantageous feature of the invention is that the adhesive applicator is configured to be controlled by position control of a servo drive.

[0023] According to the invention, the applicator head is configured to apply a hot melt adhesive for attaching the tail of the fiber web during the winding process. An advantageous feature of the invention is that the adhesive applicator is configured to be controlled by pressure control from a servo drive.

[0024] According to an advantageous feature of the invention, the high-pressure pump unit includes a piston and cylinder structure, and the piston is a high-pressure piston.

[0025] According to an advantageous feature of the invention, the applicator head is manufactured using 3D printing technology.

[0026] According to an advantageous feature of the invention, the high-pressure hot melt adhesive applicator includes a pressure relief valve for pressure release and limitation. Advantageously, the pressure relief valve is a magnetic or pneumatic pressure relief valve.

[0027] According to an advantageous feature of the invention, the high-pressure pump unit and the applicator head are temperature-controlled by a controllable heating resistor.

[0028] According to an advantageous feature of the invention, a high-pressure hot melt adhesive applicator comprising an applicator head, a high-pressure pump unit, a linear actuator, and a servo drive is formed as a single unit.

[0029] According to the present invention, the winding system of a winding machine for winding fiber webs includes an adhesive application device according to the present invention.

[0030] According to an advantageous feature of the invention, the adhesive applicator of the adhesive application device is located in the middle region in the transverse direction of the fiber web.

[0031] According to an advantageous feature of the invention, the distance from the melter of the adhesive application device to the nozzle and then to the application point is approximately half the length of the roll to be wound in the winding machine.

[0032] According to an advantageous feature of the invention, the applicator head is configured to apply a hot melt adhesive for attaching the starting end of the fiber web during the turning of the winding machine.

[0033] According to an advantageous feature of the invention, the applicator head is configured to apply a hot melt adhesive for attaching the tail of the fiber web during the turning of the winding machine.

[0034] According to the present invention, in the flipping method of a winding machine for winding fiber webs, during flipping, the starting end of the fiber web is attached to the winding shaft by an adhesive application device according to the present invention, and / or the tail end of the fiber web is attached to the completed master roll by an adhesive application device according to the present invention.

[0035] According to an advantageous feature of the invention, in this method, the power of the adhesive applicator is adjusted to a desired level before the adhesive is applied to the surface of the fiber web.

[0036] According to an advantageous feature of the invention, the pressure level in the high-pressure adhesive applicator is 100 to 200 bar, depending on the travel speed of the fiber web. Higher pressure is used at higher travel speeds, and lower pressure is used at lower travel speeds.

[0037] According to an advantageous feature of the invention, the nozzle is individually controllable.

[0038] According to an advantageous feature of the invention, in the high-pressure hot melt adhesive applicator, the adhesive cartridge of the high-pressure pump unit is positioned close to the nozzle of the applicator head, and since the nozzle and the high-pressure pump unit are located in the same structural component, the distance is advantageously about 100 mm.

[0039] According to an advantageous aspect of the invention, the adhesive application device comprises a hot melt adhesive melter with a low-pressure pump and a high-pressure hot melt adhesive applicator. The hot melt adhesive melter has a simple construction. The low-pressure pump of the melter supplies adhesive to the high-pressure hot melt adhesive applicator. The melter with the low-pressure pump supplies heated adhesive to the high-pressure hot melt adhesive applicator. The high-pressure hot melt adhesive applicator comprises a driven (advantageously servo-driven) high-pressure pump unit and an applicator head advantageously manufactured using 3D printing technology. Advantageously, the high-pressure pump unit and the applicator head are temperature-controlled. The driven high-pressure pump unit allows for various system pressure behaviors (constant, decreasing, increasing) within the application pulse because the drive speed can be varied during the application pulse. The length of the application pulse is advantageously about 1 second, and the invention provides for up to 100 control operations during a single pulse. Due to the controllable adhesive dosage, the possibility of controlling the system pressure during the application pulse enables improved performance in picking up the starting end of the fiber web and attaching the starting end of the fiber web to the surface of the winding shaft. The ability to control system pressure during pulse application also enables the use of hot melt adhesive for bonding the master roll surface, as sufficient adhesive dosage can be obtained after attachment at the starting end. Furthermore, since both the starting and ending attachments can be performed using only a single adhesive application device, the overall number of devices in the flipping system is reduced.

[0040] According to an advantageous aspect of the invention, the pressure of the adhesive flow is adjustable during application, for example, the pressure can be increased toward the end of application, to ensure a smooth and uniform adhesive film covering the entire desired location on the fiber web.

[0041] According to an advantageous aspect of the invention, the adhesive application device includes at least one sensor connected to a nozzle for monitoring the pressure and / or mass flow rate of the adhesive flow at the nozzle. Optionally, feedback from one or more nozzles to a servo motor is provided to maintain the desired flow rate and / or pressure.

[0042] According to an advantageous aspect of the invention, in the high-pressure hot melt adhesive applicator of the adhesive application device, the adhesive cartridge is positioned close to the nozzle of the adhesive application device, thereby making the amount of adhesive dispensed controllable.

[0043] According to an advantageous aspect of the invention, in the high-pressure hot melt adhesive applicator of the adhesive application device, a driven high-pressure pump unit provides precise control over the amount of adhesive to be applied.

[0044] According to an advantageous aspect of the invention, by providing an applicator head with a nozzle, the adhesive application device can also be used for adhesive application for bonding the surface of the master roll, thus eliminating the need for a separate application device in the flipping system.

[0045] According to an advantageous aspect of the invention, the applicator head is manufactured using 3D printing technology, thus allowing the applicator head to be configured to provide uniform and simultaneous operation of several nozzles. This is because the feed channels forming the adhesive can be produced with significant variation using 3D printing technology. 3D printing technology allows the feed channels to be made to the same length, thereby ensuring similar flow of adhesive from the source for each nozzle, and consequently, providing the same pressure at each nozzle.

[0046] According to an advantageous aspect of the invention, in the high-pressure hot melt adhesive applicator of the adhesive application device, the amount of adhesive to be applied is controlled by controlling a servo motor based on the adhesive flow rate (ml / s).

[0047] According to an advantageous aspect of the invention, the high-pressure hot melt adhesive applicator of the adhesive application device includes a pressure relief valve for providing pressure release and limitation. Advantageously, the pressure relief valve is a magnetic or pneumatic pressure relief valve.

[0048] According to an advantageous aspect of the invention, the high-pressure hot melt adhesive applicator of the adhesive application device includes a high-pressure piston configured to remove the earliest received adhesive from the cylinder first, even if the piston stroke is not a full stroke.

[0049] According to an advantageous aspect of the invention, the adhesive application device provides a combination of thermal protection and scaling protection.

[0050] The adhesive application device according to the invention provides that the adhesive is applied smoothly at the desired application point, and the temperature of the adhesive is suitable for optimal adhesion.

[0051] In the adhesive application apparatus according to the invention, the distance between the melter and the application point is short, thus providing adequate heating of the hot melt adhesive to achieve a good flow viscosity. Therefore, at the application point, the hot melt adhesive is at a temperature that provides good tack and adhesion properties.

[0052] The adhesive application device according to the invention also has improved applicability to different speeds and grades because it provides improved adjustability to the length and thickness of the adhesive strip at the application point.

[0053] The adhesive application device according to the invention also allows adhesive to be applied at a greater distance from the rewinding pressing zone, since applying adhesive very close to the pressing zone may cause problems. Attached Figure Description

[0054] However, various aspects and other objects and advantages of the invention will be best understood from the following description of some exemplary embodiments when read in conjunction with the accompanying drawings, and the invention will be described in more detail below with reference to the drawings.

[0055] Figures 1A to 1B The diagram schematically illustrates an advantageous example of an adhesive application device according to the invention.

[0056] Figure 2 The diagram illustrates an example of a winding machine in the flipping stage.

[0057] Figures 3A to 3B An example of pressure at the nozzle is shown in the figure; Figure 3A The image shows an example of pressure at the nozzle in a prior art adhesive application device. Figure 3B An example of pressure at the nozzle in an adhesive application device according to the present invention is shown.

[0058] Figures 4A to 4B An example of the quality of adhesive ejected from the nozzle is shown; in Figure 4A The image shows an example of the quality of adhesive ejected from a nozzle in a prior art adhesive application device. Figure 4B An example of the mass of adhesive sprayed from a nozzle in an adhesive application device according to the present invention is shown.

[0059] Figures 5A to 5B An example of an adhesive film on a fiber web is shown; in Figure 5A An example of an adhesive film on a fiber web in a prior art adhesive application apparatus is shown. Figure 5B An example of an adhesive film on a fiber web in an adhesive application device according to the present invention is shown. Detailed Implementation

[0060] In the following description, unless otherwise stated, the same reference numerals denote similar parts, and it should be understood that these examples can be modified within the framework of the invention to suit different uses and conditions. For clarity, some repetitions of reference numerals may be omitted in the figures. In some figures, arrows have been used to indicate the rotational direction of the main components of the structure.

[0061] Figures 1A to 1B An exemplary embodiment of an adhesive application device 50 is schematically illustrated. The adhesive application device 50 includes a melter 40 and a high-pressure hot melt adhesive applicator 20. The melter is a hot melt adhesive melter 40, and the high-pressure hot melt adhesive applicator includes an applicator head 21, a high-pressure unit 22, a linear actuator 23, and a linear actuator movement 24 formed integrally. In this example of the figures, the linear actuator movement is a servo drive 24. The hot melt adhesive melter 40 includes a heater (not shown) and a low-pressure pump (not shown) for supplying heated adhesive to the high-pressure hot melt adhesive applicator 20. The applicator head 21 is provided with a means for... Figure 2The high-pressure hot melt adhesive applicator 20 is supplied with adhesive via a nozzle 31 for applying adhesive to the starting end of the fiber web during the folding of the winding machine 10, and advantageously, a nozzle (not shown) is also provided for applying adhesive to the tail end of the fiber web during the folding of the winding machine 10. The melter 40 supplies adhesive to the high-pressure hot melt adhesive applicator 20 via a tubular channel 42 connected to the adhesive feed opening 41 of the applicator head 21. The applicator head 21 includes a channel (not shown) for supplying hot melt adhesive from the feed opening 41 to the nozzle 31. The applicator head 21 is advantageously manufactured using 3D printing technology. Temperature control is advantageously achieved by providing a controllable heating resistor (not shown) to the high-pressure pump unit 22 and the applicator head 21. In the high-pressure hot melt adhesive applicator 20, the adhesive cartridge 34 of the high-pressure pump unit 22 is positioned close to the nozzle 31 of the applicator head 21, and the servo-driven high-pressure pump unit 22 provides precise control of the amount of adhesive to be applied through the movement of the piston 35 of the high-pressure pump unit 22. The distance between the nozzle 31 and the high-pressure pump unit 22 is only about 100 mm, and these components are located in the same structural part. The high-pressure hot melt adhesive applicator 20 includes a pressure relief valve 44 (located inside the external frame structure, in...) Figure 1B (Indicated by arrow 44), the pressure relief valve provides pressure release and limitation. Advantageously, the pressure relief valve is a magnetic or pneumatic pressure relief valve. Advantageously, the piston 35 of the high-pressure pump unit 22 is a high-pressure piston 35.

[0062] In the operation of the adhesive application device 50, adhesive is supplied from the melter 40 via channel 42 to the feed opening 41 in the applicator head 21 of the high-pressure hot melt adhesive applicator 20. In the applicator head 21, the adhesive is conveyed via channel to the nozzle 31. This application is controlled by the cylinder 34-piston 35 structure of the high-pressure pump unit 22, which is operated by a linear actuator 23 and a servo drive 24. At the pick-up start end, adhesive is applied to the middle of the fiber web in the transverse direction. When the tail of the fiber web is attached to the surface of the finished roll, an adhesive strip is provided on the surface of the fiber web. Typically, the adhesive applicator is located in a water jet turn-up device, connected to a cutting device located at the arm of the water jet turn-up device. Different types of nozzles are typically used in conjunction with the pick-up and tail-end attachment.

[0063] exist Figure 2The diagram shows the winding machine 10 in a flipping phase, in which the winding of the master roll 14 has reached the stage where the diameter of the master roll 14 is the desired diameter and therefore the master roll 14 is complete. Winding around this master roll will be completed and will then change to winding around the next winding shaft 11. The adhesive application device 50 is configured to attach the starting end of the fiber web to the new winding shaft 11 and the tail end to the completed master roll 14 for bonding its surfaces. During flipping, the fiber web W is cut, and the tail end of the cut web W is guided around the completed master roll 14 with the desired diameter, and the starting end of the cut fiber web W is guided around a new winding shaft 11 that has been moved from a winding shaft storage device or from a waiting position in contact with the winding drum 15 to the starting position of winding. Winding begins while the winding shaft is in this changing position, and as winding proceeds, the winding shaft is lowered to the winding position.

[0064] exist Figures 3A to 3B An example of pressure at the nozzle is shown in the figure; Figure 3A The image shows an example of pressure at the nozzle in a prior art adhesive application device. Figure 3B An example of pressure at the nozzle in an adhesive application device according to the present invention is shown. In the figure, the X direction represents time (s) and the Y direction represents pressure (bars). (See from...) Figure 3A As can be seen from the pressure curve P1, in the known arrangement, the pressure at the nozzle decreases significantly as the adhesive application time (i.e., the application pulse) passes. Conversely, in the arrangement according to the invention, the pressure at the nozzle is uniform throughout the entire adhesive application process (i.e., during the entire application pulse), as shown from... Figure 3B This can be seen from the pressure curve P2.

[0065] exist Figures 4A to 4B An example of the quality of adhesive ejected from the nozzle is shown in the figure; Figure 4A The image shows an example of the quality of adhesive ejected from a nozzle in a prior art arrangement of an adhesive application device. Figure 4B An example of the mass of adhesive ejected from a nozzle in an adhesive application device according to the present invention is shown. In the figure, the X direction represents time (s), and the Y direction represents the mass of adhesive (g). Figure 4A As can be seen from the adhesive quality curve GM1, in the known arrangement, the amount of applied adhesive exiting the nozzle decreases significantly as the adhesive application time (i.e., the application pulse) progresses. Conversely, in the arrangement according to the invention, the quality of adhesive exiting the nozzle is uniform throughout the adhesive application process (i.e., throughout the entire application pulse), as shown by the curve GM1. Figure 4B This can be seen from the adhesive quality curve GM2.

[0066] exist Figures 5A to 5B An example of an adhesive film on a fiber web is shown; in Figure 5A An example of an adhesive film on a fiber web in a prior art adhesive application apparatus is shown. Figure 5B An example of an adhesive film on a fiber web in an adhesive application device according to the present invention is shown. In the figure, the X direction represents time (s), the Y direction represents the width of the adhesive film (mm), and the shading represents the thickness of the adhesive film (the darker the shading, the thicker the adhesive film). Figure 5A As can be seen in the adhesive film regions S1-Sn, in the known arrangement, the width of the adhesive film in regions S1 to Sn changes significantly and decreases as the adhesive application time (i.e., the application pulse) progresses. There may even be localized areas NG with no adhesive film. Conversely, in the arrangement according to the invention, the width of the adhesive film is uniform throughout the entire application process of the adhesive (i.e., during the entire application pulse), as can be seen from... Figure 5B This can be seen from [the text]. Additionally, as seen from [the text]... Figure 5A As can be seen from the shading, the thickness of the adhesive film decreases as the application time (i.e., the application pulse) progresses. Conversely, in the arrangement of the present invention, the thickness of the adhesive film remains uniform throughout the application process, as shown in the image. Figure 5B This can be seen from the text.

[0067] In the foregoing description, although some functions have been described with reference to certain features, these functions can be performed by other features, whether or not they are described. Although features have been described with reference to certain embodiments or examples, these features may also exist in other embodiments or examples, whether or not they are described. The invention has been described above only by reference to some advantageous examples, but the invention is not narrowly limited to these examples. Many modifications and changes are possible within the invention as defined in the appended claims.

Claims

1. An adhesive application device (50) for a turning system of a winding machine in a fiber web production line, the adhesive application device comprising a melt (40) and an adhesive applicator (20), the adhesive applicator (20) comprising a nozzle (31), wherein the melt (40) is connected to the adhesive applicator (20) via a feed channel (42) for supplying adhesive to the nozzle (31) of the adhesive applicator (20), characterized in that, The melter (40) is a hot melt adhesive melter (40). The adhesive applicator (20) is a high-pressure hot melt adhesive applicator (20), which includes an applicator head (21), a high-pressure pump unit (22), a linear actuator (23), and a linear actuator moving part (24). The high-pressure pump unit (22) is driven by the linear actuator (23) and the linear actuator moving part (24). The applicator head (21) is configured to apply a hot melt adhesive for attaching the starting end of the fiber web during the folding of the winding machine, and / or the applicator head (21) is configured to apply a hot melt adhesive for attaching the tail end of the fiber web during the folding of the winding machine.

2. The adhesive application device according to claim 1, characterized in that, The linear actuator moving part (24) is a servo driver.

3. The adhesive application device according to claim 2, characterized in that, The adhesive applicator (20) is configured to be controlled by the position control of the servo driver (24).

4. The adhesive application device according to claim 2 or 3, characterized in that, The adhesive applicator (20) is configured to be controlled by pressure control of the servo driver (24).

5. The adhesive application device according to any one of claims 1 to 4, characterized in that, The high-pressure pump unit (22) includes a piston (35) and a cylinder (34) structure, and the piston (35) is a high-pressure piston.

6. The adhesive application device according to any one of claims 1 to 5, characterized in that, The applicator head (21) is manufactured using 3D printing technology.

7. The adhesive application device according to any one of claims 1 to 6, characterized in that, The high-pressure hot melt adhesive applicator (20) includes a pressure relief valve for pressure release and limitation.

8. The adhesive application device according to any one of claims 1 to 7, characterized in that, The high-pressure pump unit (22) and the applicator head (21) are temperature-controlled by a controllable heating resistor.

9. The adhesive application device according to any one of claims 2 to 8, characterized in that, The high-pressure hot melt adhesive applicator (20), including the applicator head (21), the high-pressure pump unit (22), the linear actuator (23) and the servo driver (24), is formed as a single unit.

10. A turning system for a winding machine (10) for winding fiber webs (W), characterized in that, The flipping system includes an adhesive application device (50) according to any one of claims 1 to 9.

11. The flipping system according to claim 10, characterized in that, The adhesive applicator (20) of the adhesive application device (50) is located in the middle region in the transverse direction of the fiber web.

12. The flipping system according to claim 10 or 11, characterized in that, The distance from the melter (40) to the nozzle (31) of the adhesive application device (50) is approximately half the length of the roll to be wound in the winding machine.

13. A method for flipping up a winding machine for winding fiber webs, characterized in that, In the method, during the flipping, the starting end of the fiber web is attached to the winding shaft (11) by means of the adhesive application device (50) according to any one of claims 1 to 9, and / or the tail end of the fiber web is attached to the completed master roll (14).

14. The flipping method according to claim 13, characterized in that, In the method, the power of the adhesive applicator (20) is adjusted to a desired level before the adhesive is applied to the surface of the fiber web.

Images