CN110997533A - Uncoiling station - Google Patents

Uncoiling station Download PDF

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Publication number
CN110997533A
CN110997533A CN201880051839.4A CN201880051839A CN110997533A CN 110997533 A CN110997533 A CN 110997533A CN 201880051839 A CN201880051839 A CN 201880051839A CN 110997533 A CN110997533 A CN 110997533A
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CN
China
Prior art keywords
web
unwind
unwinding
primary
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201880051839.4A
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Chinese (zh)
Other versions
CN110997533B (en
Inventor
R-H.普莱辛
M.沃尔法特
E.韦特申巴彻
H.伊伦伯格
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Voith Patent GmbH
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Voith Patent GmbH
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Publication date
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Publication of CN110997533A publication Critical patent/CN110997533A/en
Application granted granted Critical
Publication of CN110997533B publication Critical patent/CN110997533B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1805—Flying splicing, i.e. the expiring web moving during splicing contact
    • B65H19/181—Flying splicing, i.e. the expiring web moving during splicing contact taking place on the replacement roll
    • B65H19/1815—Flying splicing, i.e. the expiring web moving during splicing contact taking place on the replacement roll the replacement web being stationary prior to splicing contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1805—Flying splicing, i.e. the expiring web moving during splicing contact
    • B65H19/181—Flying splicing, i.e. the expiring web moving during splicing contact taking place on the replacement roll
    • B65H19/1821—Flying splicing, i.e. the expiring web moving during splicing contact taking place on the replacement roll the replacement web being accelerated or running prior to splicing contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1857—Support arrangement of web rolls
    • B65H19/1863—Support arrangement of web rolls with translatory or arcuated movement of the roll supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
    • B65H23/08—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle acting on web roll being unwound
    • B65H23/085—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle acting on web roll being unwound and controlling web tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/412—Roll
    • B65H2301/4128—Multiple rolls
    • B65H2301/41284—Multiple rolls involving juxtaposed lanes wound around a common axis
    • B65H2301/412845—Multiple rolls involving juxtaposed lanes wound around a common axis and spliced to each other, e.g. for serial unwinding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4134—Both ends type arrangement
    • B65H2301/41342—Both ends type arrangement shaft transversing the roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4135—Movable supporting means
    • B65H2301/41352—Movable supporting means moving on linear path (including linear slot arrangement)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/417—Handling or changing web rolls
    • B65H2301/4171—Handling web roll
    • B65H2301/4173—Handling web roll by central portion, e.g. gripping central portion
    • B65H2301/41734—Handling web roll by central portion, e.g. gripping central portion involving rail
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/446—Assisting moving, forwarding or guiding of material
    • B65H2301/4462—Assisting moving, forwarding or guiding of material by jogging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/461—Processing webs in splicing process
    • B65H2301/4615—Processing webs in splicing process after splicing
    • B65H2301/4617—Processing webs in splicing process after splicing cutting webs in splicing process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/463—Splicing splicing means, i.e. means by which a web end is bound to another web end
    • B65H2301/4633—Glue
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/90—Machine drive
    • B65H2403/94—Other features of machine drive
    • B65H2403/942—Bidirectional powered handling device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/84—Paper-making machines

Abstract

The invention relates to a method for unwinding a material web (1), in particular a paper or cardboard web, the method is used for selectively positioning a material web for a subsequent machine unit (2) for processing the material web (1) by using an uncoiling station, wherein the uncoiling station comprises a main uncoiling device (3) with a coil driving device, at least one secondary uncoiling device (4) and a bonding and breaking device (5), wherein the coil (7) is first unwound in the primary unwind (3) and continues after transfer of the coil into the secondary unwind (4), and a new coil (7) is arranged into the primary unwind (3), and in that the splicing and separation device (5) connects the material web (1) of the secondary unwind with the material web (1) of a new roll (7) and disconnects the material web (1) extending from the secondary unwind (4) to the splicing position when changing rolls. The effort is reduced in that a single secondary unwind (4) is arranged between the main unwind (3) and the subsequent machine unit (2), and when a new coil (7) is to be unwound from a downward-facing top side, the connection between the material webs (1) is made when the new coil (7) of the main unwind (3) is stationary or when the rotational speed of the new coil (7) of the main unwind (3) is between 0 and 4 m/s.

Description

Uncoiling station
The invention relates to a method for unwinding a material web, in particular a paper or cardboard web, with an unwinding station for selectively positioning the material web for a subsequent machine unit for processing the material web, which unwinding station comprises a primary unwinding device with a web drive, at least one secondary unwinding device and a splicing and severing device, wherein the material web is first unwound in the primary unwinding device and is unwound after transfer of the material web into the secondary unwinding device, and a new material web is arranged in the primary unwinding device, and the splicing and severing device connects the material web of the secondary unwinding device with the material web of the new material web and severs the material web extending from the secondary unwinding device to a splicing position when changing the web.
Unwinding stations of the kind described herein are known. They are used for continuously unwinding a web of material from a roll and are arranged in front of a machine for processing the web of material, such as a coater or a calender.
The known unwinding station comprises a primary unwind and a secondary unwind for guiding the coil. The completed coil is first guided by the main unwind during unwinding of the web of material. From the desired diameter of the coil, the coil is transferred from the primary unwind onto a secondary unwind. For this purpose, for example, oscillating arms are used which can oscillate about an axis, act on both sides of the web and transfer the web to the secondary unwind by means of an oscillating movement.
Furthermore, an additional rotatable auxiliary drive is provided, which drives the web during the transfer.
A new, complete roll is then fed to the primary unwind, and the web of material wound on the roll is connected to the web of material drawn from the roll guided by the secondary unwind, after which the roll is completely unwound. For this purpose, a bonding device is provided, which usually has a bonding roller that can rotate about an axis, by means of which a material web drawn from a web guided by the secondary unwinding device is fed to a subsequent web processing machine (viewed in the direction of travel of the material web). In order to connect the two webs to one another, the adhesive roller is rotated and pressed onto the web guided by the main unwind. At the same time, the material web unwound from the web guided by the secondary unwind is separated by means of a shearing device.
In this case, it must be considered that the top side of the material web lying on the web is selectively oriented upwards or downwards when it is fed to the subsequent machine unit.
Correspondingly, it is relatively complex to have a secondary unwind on both sides of the primary unwind. Furthermore, a new, complete coil must be transferred to the primary unwind beyond the secondary unwind. Problems arise simply due to the high weight of the complete roll.
The object of the invention is therefore to reduce the effort for selective positioning of the material web during unwinding.
The above-mentioned object is achieved according to the invention in that a single secondary unwinding device is arranged between the main unwinding device and the subsequent machine unit, and in the case of a new coil intended to be unwound with the downward-facing top side, the connection between the material webs is made when the new coil of the main unwinding device is stationary or when the rotational speed of the new coil of the main unwinding device is between 0 and 4 m/s.
In this case, the main unwind drives for changing the position of the material web to be unwound in a direction of rotation corresponding to the position.
This means that the connection of the web end of the secondary unwind to the complete coil of the primary unwind takes place independently of the current or intended direction of rotation of the primary unwind.
Irrespective of the web guide direction of the material webs to be joined, it is advantageous for a reliable change of the rolls to carry out the joining between the material webs when the new web of the main unwind is stationary or when the rotational speed of the new web of the main unwind is between 0 and 4m/s, preferably between 0 and 1 m/s.
This results in a reduction of the web tension when, at the point of connection, the web guidance direction of the material web from the secondary unwind is opposite with respect to the current web guidance direction of the complete coil of the primary unwind, i.e. a new coil is intended to be unwound with the top side of the web facing downwards.
Thus, the web tensioning method is used when a new roll is intended to be unwound with the top side of the web facing downwards. Since the secondary unwind is always located between the primary unwind and the subsequent machine for treating the web of material, unwinding of a new web of material with the top side in the web of material subsequently facing downwards results in the above-mentioned opposite direction when connecting with the web end of the secondary unwind.
A drop in the web tension is to be prevented or at least limited in terms of duration and/or strength by the web tensioning method.
In order to increase the web tension, a web tensioning device in the form of a tensioning roller can be pressed into the path of travel of the material web after the main unwinding device and/or a web tensioning device in the form of a blowing element directs the blown air into the path of travel of the material web.
Independently of this or in addition, it is also advantageous if the coil of the main unwinding device is temporarily driven in the opposite direction in order to increase the web tension.
At the end of the transfer, the drive of the secondary unwind after severing the material web should drive the web material counter to the unwinding direction in order to wind up the web end remaining there.
In the unwinding station, it is important that a single secondary unwinding device is arranged between the primary unwinding device and the machine unit following in the web guiding direction, and that the primary unwinding device can be driven in a rotational direction corresponding to the positioning in order to change the positioning of the material web to be unwound.
In this case, the secondary unwinding device also has a drive for assisting the unwinding.
In addition, the establishment of a connection between the material webs can be simplified if the primary unwind is stationary and the secondary unwind is mounted so as to be movable in the direction of the primary unwind for receiving a coil.
In the case of a loss of web tension, in particular with the top side of the material web facing downward, it is advantageous if the material web is assigned at least one web tensioning device after the main unwinding device.
The web tensioning device should preferably be designed as a blowing element, in particular a blow box or blow pipe, and/or as a tensioning roller.
It is particularly advantageous if the subsequent machine unit is a levelling device or a coating machine or, in particular, a web cutter.
The invention is further illustrated by the following examples. In the drawings, fig. 1 to 6 show a schematic side view of an unwinding station and the flow of the unwinding.
The unwinding station described below can be used in particular in connection with a coil cutter or similar as the subsequent machine unit 2.
In the unwinding station, the material web 1 wound on winding cores into a roll 7 is connected to one another, i.e. continuous, in order to achieve a continuous processing work in a coil cutter arranged after the unwinding station (viewed in the direction of travel 9 of the material web 1).
To this end, the unwinding station has a primary unwind 3 of the web drive, a secondary unwind 4 of only one web drive, and an adhering and severing device 5. The working position of the secondary unwind 4 is located here between the primary unwind 3 and the subsequent machine unit 2, i.e. the coil cutter, in the web guide direction 9.
As can be seen in fig. 1, unwinding starts in the primary unwind 3 and a complete coil 7 is delivered to the primary unwind 3. Here, the web 7 is wound on a core, the web having a diameter of, for example, 3500mm and more.
The primary unwind 3 and the secondary unwind 5 are interconnected by a guide device comprising two mutually parallel and horizontally extending guide rails 8.
Advantageously, the primary unwind 3 is stationary in the web guiding direction, while the secondary unwind 4 together with its drive is movably supported along the guide from its operating position to the primary unwind 3 and back again in order to receive the already mostly unwound coil 7.
The winding cores are provided with support necks at their ends, which are each supported in a fork-shaped receptacle of the secondary unwind 4.
Fig. 2 shows the unwinding station after the coil 7 has been taken up by the secondary unwinding station 4, and fig. 3 shows the unwinding station after a new complete coil 7 has been taken up next by the primary unwinding station 3. In this case, the complete coil 7 may not need to be fed to the primary unwind 3 beyond the secondary unwind 4 as is normally the case.
In this case, the direction of rotation of the coil 7 in the primary unwind 3 and thus in turn in the secondary unwind 4 can be selected such that the top side of the material web 1 faces downward or upward when fed to the subsequent machine unit 2. The top side of the material web 1 is always based on the material web 7. The positioning of the material web 1 in the subsequent machine unit 2 is particularly important when the two web sides have different material properties and the positioning of the sides has an influence on the subsequent processing, in particular in the subsequent machine unit 2.
In contrast to the known solutions, this is achieved here with only one secondary unwind 4, which greatly reduces the effort.
As shown, if the subsequent machine unit 2 is located on the left side of the secondary unwind 4, unwinding in a clockwise direction (indicated by dashed lines) results in the top side of the material web 1 facing downwards when reaching the subsequent machine unit 2. In the counterclockwise unwinding, the top side of the material web faces upward.
The diameter and the extent of unwinding of the coil 7 are thus also detected by the distance sensor.
If the unwinding of the web 7 according to fig. 3 and thus its diameter reach a predetermined value, the material web 1 from the secondary unwind 4 is joined and glued by means of the gluing and severing device 5 to a new, full web 7 of material from the primary unwind 3, as shown in fig. 4.
Furthermore, the gluing and severing device 5 also severs the web 1, originating from the secondary unwind 4, before the joining position.
To wind up the head hanging after severing the end of the unwound web, the drive of the secondary unwind 4 then temporarily drives the web 7 counter to the unwinding direction.
The gluing and cutting devices 5, known and responsible for joining the web ends, are located below the main unwinding device 3 and can be adjusted to adapt to the varying diameter of the complete web 8.
The gluing and breaking device 5 of the unwinding station comprises a gluing trolley holding a gluing roller.
A cutting device is also mounted on the bonding cart, the cutting device having a cutting knife preferably provided with serrations.
Fig. 5 shows the situation in which the current or intended unwinding direction of the new complete web 7 at the joining location coincides with the direction of travel of the web 1 unwound from the secondary unwind 4.
Since no problems with web tension have to be taken into account here, the connection between the material webs can be made at a rotation speed of the new reel 7 of the main unwind 3 of between 0 and 4 m/s.
However, in the case where a new roll 7 is intended to be unwound with the top side of the web facing downwards, a reduction in the web tension is to be taken into account. Thus, as shown in fig. 6, a web tensioning method should be used.
Thus, to increase the web tension, the coil 7 of the main unwind 3 is temporarily driven in the opposite direction.
Alternatively or additionally, however, the web tensioning device 6 can also be activated according to fig. 6. The web-tensioning device 6 is located between the new web 7 of the main unwind 3 and a subsequent turning roll 10 in the web guiding direction 9.
In particular, a tensioning roller can be pressed as a web tensioning device 6 into the path of the material web 1 and/or blowing elements can direct blowing air into the path of the material web 1.
In order to minimize the web tension problem, especially with the top side of the web facing downwards, the connection between the material webs 1 should be made when the new roll 7 on the main unwind 3 is stationary or when the rotation speed of the new roll 7 on the main unwind 3 is between 0 and 1 m/s.
In order to simplify the transfer of the already mostly unwound coil 7 to the secondary unwind 4, two coil drives are arranged on different sides of the machine. In particular, the larger drive of the primary unwind 3 for the complete coil 7 is located on the mechanical side, and the smaller drive of the secondary unwind 4 for the coil 7, which has been mostly unwound, is located on the operator side of the machine, accessible to the operator.
It is important here that the drive of the secondary unwind 4 remains coupled to the coil 7 after the transfer until the end of the unwinding, i.e. the unwinding station operates with two drives. Furthermore, the larger drive of the main unwind 3 is fixed and only the smaller drive can move, which simplifies the design.
The web draw is adjusted during the entire process, which eliminates winding defects.

Claims (8)

1. Method for unwinding a material web (1), in particular a paper or cardboard web, by means of an unwinding station for selectively positioning the material web (1) for a subsequent machine unit (2) for treating the material web (1), the unwinding station comprising a primary unwinding (3) with a web drive, at least one secondary unwinding (4) and a splicing and severing device (5), wherein a web (7) is first unwound in the primary unwinding (3) and is continued after transfer of the web into the secondary unwinding (4), and a new web (7) is arranged into the primary unwinding (3), and upon a change of the roll the splicing and severing device (5) connects the material web (1) of the secondary (4) with the material web (1) of the new web (7) and connects the material web extending from the secondary unwinding (4) to the splicing position Web (1) breaking, characterized in that a single secondary unwind (4) is arranged between the primary unwind (3) and the subsequent machine unit (2) and in case a new coil (7) is intended to be unwound with a downward facing web top side, the connection between the webs of material (1) is made when the new coil (7) of the primary unwind (3) is stationary or when the rotational speed of the new coil (7) of the primary unwind (3) is between 0 and 4 m/s.
2. Method according to claim 1, characterized in that the drive of the secondary unwind (4) after severing of the web of material (1) drives the web material (7) counter to the unwinding direction in order to wind up the web end remaining in the secondary unwind.
3. The method according to claim 1 or 2,
the connection between the material webs (1) is carried out when a new coil (7) of the main unwinding device (3) is stationary.
4. The method according to claim 1 or 2,
the connection between the material webs (1) is carried out at a rotational speed of the new coil (7) of the main unwind (3) of between 0 and 4m/s, preferably between 0 and 1 m/s.
5. Method according to one of the preceding claims, characterized in that the web tensioning method is used when a new roll (7) is intended to be unwound with the top side of the web facing downwards.
6. Method according to claim 5, characterized in that for increasing the web tension, a web tensioning device (6) in the form of a tensioning roller is pressed into the path of travel of the material web (1) after the main unwind (3).
7. Method according to claim 5, characterized in that for increasing the web tension, a web tensioning device (6) in the form of a blowing element directs blown air into the path of travel of the material web (1) after the main unwinder (1).
8. Method according to claim 5, characterized in that the rolls (7) of the main unwind (3) are temporarily driven in opposite directions in order to increase the web tension.
CN201880051839.4A 2017-08-11 2018-08-06 Uncoiling station Active CN110997533B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102017118312.4A DE102017118312A1 (en) 2017-08-11 2017-08-11 unrolling
DE102017118312.4 2017-08-11
PCT/EP2018/071244 WO2019030161A1 (en) 2017-08-11 2018-08-06 Unwinding station

Publications (2)

Publication Number Publication Date
CN110997533A true CN110997533A (en) 2020-04-10
CN110997533B CN110997533B (en) 2022-02-25

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CN201880051839.4A Active CN110997533B (en) 2017-08-11 2018-08-06 Uncoiling station

Country Status (5)

Country Link
EP (1) EP3665112B1 (en)
CN (1) CN110997533B (en)
DE (1) DE102017118312A1 (en)
FI (1) FI3665112T3 (en)
WO (1) WO2019030161A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019111470B4 (en) * 2019-05-03 2022-06-02 Voith Patent Gmbh unwind station
DE102019111592A1 (en) * 2019-05-06 2020-11-12 Voith Patent Gmbh Material web processing

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CN110997533B (en) 2022-02-25
WO2019030161A1 (en) 2019-02-14

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