CN214383597U

CN214383597U - Uncoiling station

Info

Publication number: CN214383597U
Application number: CN201890001295.6U
Authority: CN
Inventors: E.韦辰巴彻; H.伊伦博格; R-H.普莱辛; M.沃尔法特
Original assignee: Voith Patent GmbH
Current assignee: Voith Patent GmbH
Priority date: 2017-10-18
Filing date: 2018-07-02
Publication date: 2021-10-12
Anticipated expiration: 2028-07-02
Also published as: WO2019076496A1; AT17514U1; FI12773Y1; DE102017124246B4; DE102017124246A1

Abstract

The utility model relates to an open a book station, open a book station is used for subsequent machine element (9) that are used for handling material breadth (1) to expand material breadth (1), especially paper web or cardboard breadth, open a book station has primary unwinding unit (2), at least one secondary unwinding unit (3) and at least one by the bonding separator (5) that are used for realizing butt joint concatenation principle that the holding device bore. In this case, maintenance and repair are facilitated in that at least one element of the adhesive separating device (5) for butt-joint can be axially removed from its holding device (10, 11) and/or unlocked from its holding device (10, 11) by means of a quick-action locking device.

Description

Uncoiling station

Technical Field

The utility model relates to a decoil station that is used for subsequent machine unit expansion material breadth that is used for handling the material breadth, especially paper or cardboard breadth, decoil station including primary unwinding unit, at least one secondary unwinding unit and at least one be used for implementing the bonding separator of butt joint concatenation principle.

Background

Unwinding stations of the type mentioned here are known. They are used to unwind a web of material continuously from a reel and are arranged upstream of a machine for treating the web of material, for example upstream of a coating or calender.

The known unwinding station comprises primary and secondary unwinding devices for guiding the reels. The completed reel is first guided by a primary unwinding device during the unwinding of the web of material. From the desired reel diameter, the reel is transferred from the primary winding device to the secondary winding device.

A new complete reel is then fed into the primary unwinding device and the web of material wound thereon is connected to the web of material coming to completion (before it is completely unwound) guided by the secondary unwinding device. For this purpose, adhesive separating means are provided.

From EP 0462157-B1, a device is known which has a device for cutting off and holding the outfeed web. The holding device for the outgoing web is rotatably mounted in order to press it against the completed reel being replaced, and an adhesive strip is attached to the web start end of the reel. A connection is thus established in which the end of the outgoing web overlaps the web start of the new reel at the splicing point.

This splicing process is typically performed while the new reel is rotating and is called dynamic splicing (or called dynamic splicing).

In contrast, DE 4325944 a1 and EP 1163178 a1 describe a splicing device with a holding device for holding the end of the outgoing web, which is arranged fixedly on the web side of the outgoing web and has two holding elements which are also arranged at a distance from one another in the running direction of the web. The web transport device is used to pick up the web start of the complete reel on its circumference and to transport the web start to the rear of the area of the holding device. For cutting the web, a cutting knife is arranged in the groove of the holding device between the two holding elements. On the other side of the web there is a strip dispenser which can be moved up and down and by means of which the adhesive connecting strip can be moved against the web. When the pressure piece is moved toward the holding element, the web to be completed (or the end web) and the start end of the new web are jointly cut. As a result, the new web end and the new web start are directly adjacent to one another and can therefore be connected to one another without gaps.

Such a connection is called butt splicing without overlapping the two webs, which has the advantage that the connection point does not have twice the web thickness and also no stepped shoulder (joint) at the splicing point. The splice at the splice point can cause subsequent processing machinery to malfunction.

However, the unwinding device and the subsequent processing machines are usually stopped during the butt-splicing method.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the invention is to simplify the maintenance and repair of the adhesive separating device in as short a downtime as possible.

According to the invention, this object is achieved by an unwinding station for unwinding a material web, in particular a paper web or a fingerboard web, for a subsequent machine unit for processing the material web, having a primary unwinding device, at least one secondary unwinding device and at least one adhesive separating device carried by a holding device for carrying out the butt-splice principle, according to which at least one element of the adhesive separating device for butt-splicing can be axially removed from its holding device and/or can be unlocked (or released) from its holding device by means of a quick-action locking device.

In this way, the element can also be maintained, repaired or replaced during operation of the unwinding station, which has a corresponding effect on the downtime of the relatively complex adhesive separating device.

The axial displacement or replacement can be performed here hydraulically, pneumatically, electrically or manually.

In order to take full advantage of this advantage, the adhesive separating device for the butt splice should at least be able to be removed completely axially from its holding device and/or unlocked from its holding device by means of a quick-lock device.

In a preferred embodiment, at least the adhesive separating device for the butt splice can be axially removed from its holding device and/or unlocked from its holding device by means of a quick-lock device.

In a preferred embodiment, the unwinding station is provided with a further adhesive separating device carried by its own holding device, preferably for implementing the dynamic splicing principle.

In a preferred embodiment, all adhesive separating devices or at least one element of each of all adhesive separating devices can be axially removed from their holding device and/or unlocked from the holding device by means of a quick-lock device.

In a preferred embodiment, the unwinding station has only one secondary unwinding device.

In a preferred embodiment, a plurality of adhesive separating devices together use at least one deflecting roller for web guidance.

In a preferred embodiment, the primary unwind is stationary and the secondary unwind is supported for the take-up reel so as to be movable towards the primary unwind.

In a preferred embodiment, the subsequent machine unit in the web running direction is designed as a calendering device or a coating machine or in particular as a roll cutting machine.

It is furthermore advantageous to provide further adhesive separating means carried by the self-holding means, which are preferably used to implement the dynamic splicing principle.

The presence of a plurality of holding devices, in particular for different adhesive separating devices, although this means that little additional effort is required, significantly expands the possible use of the unwinding station.

In addition, special operating conditions can be adapted by different splicing methods.

In addition, if one adhesive separating device fails, the other adhesive separating device is allowed to operate, which greatly reduces the downtime of the unwinding station.

In order to be able to maintain the individual adhesive separating devices outside the machine, in particular even during operation, all of the adhesive separating devices or at least one of their elements should therefore be able to be axially removed from their holding device and/or unlocked from their holding device by means of a quick-lock device.

The use of only one secondary unwind can greatly reduce costs. In addition, this does not hinder the supply of a new complete reel to the primary unwind, since it is preferably arranged between the primary unwind and the subsequent machine unit.

The position of the unwound material web is determined here by the choice of the direction of rotation of the reel in the primary unwinding device.

This means that the connection of the web end of the secondary unwind to the web end of the complete reel of the primary unwind should be advantageous regardless of the current or intended direction of rotation of the primary unwind.

Since a plurality of adhesive separating devices are prone to spatial problems, a plurality of adhesive separating devices should jointly use at least one, preferably a plurality of deflection rollers for web guidance.

It is also helpful to establish a connection between the material webs if the primary unwinding device is stationary and the secondary unwinding device is movably supported for receiving a reel toward the primary unwinding device.

In the event of a loss of web tension, in particular if the upper side of the material web is directed downwards, it is advantageous if the material web is provided with at least one web tensioning device after the primary unwinding device.

The web tensioning device should preferably be designed as a blowing element, in particular a blow box or a blow pipe, and/or as a tensioning roller.

Particular advantages arise if the subsequent machine unit is designed as a calendering device or a coating machine or, in particular, as a reel-cutting machine.

Drawings

The invention will be explained in more detail below using exemplary embodiments. Shown in the accompanying drawings:

FIG. 1: a schematic partial cross section of the unwinding station is cut,

FIG. 2: unwinding station and method for changing reels according to the butt-joint splicing principle

FIG. 3: an unwinding station when changing reels according to the dynamic splicing principle.

Detailed Description

The unwinding station described below can be used in particular with a reel-cutter or the like used as a subsequent machine unit 9.

In the unwinding station, the material webs 1 wound on the drums to form the reels 7 are connected to one another, that is to say are continuous or endless, so that, viewed in the running direction of the material webs 1, continuous processing operations can be carried out in the reel-cutting machine downstream of the unwinding station.

For this purpose, the unwinding station has a primary unwinding device 2 with a reel drive, only one secondary unwinding device 3 with a reel drive and two different

adhesive separating devices

5, 6. The working position of the secondary unwind 3 is in this case between the primary unwind 2 and a subsequent machine unit 9, i.e. a slitter, in the web running direction 8.

Unwinding is started in the primary unwind 2 into which primary unwind 2 the complete reel 7 is fed. In this case, the reel 7, which may have a diameter of, for example, 3500mm or more, is wound on the drum.

The primary unwind 2 and the secondary unwind 3 are connected to each other by a guide device comprising two slide rails extending parallel and horizontally to each other.

When the primary unwind 2 is stationary, the secondary unwind 3 is supported, jointly with its drive, in a guiding direction, advancing from its operating position towards the primary unwind 2 and moving back, in order to receive the reel 7 that has been unwound substantially.

The drums provided with bearing pins at their ends are each supported in a receiving fork of the secondary unwind 3.

Figures 2 and 3 show the unwinding station after the reel 7 has been received by the secondary unwinding station 3, and then a new complete reel 7 has been received by the primary unwinding station 2. The complete reel 7 can be transferred to the primary unwind 3 without having to pass over the second secondary unwind 3, which is most common.

The direction of rotation of the reel 7 in the primary unwind 2 and thus of the reel 7 in the secondary unwind 3 can be chosen such that the upper side of the web of material 1 points downwards or upwards when fed to the subsequent machine unit 9. The upper side of the material web 1 is always referred to as a reel 7. The position of the material web 1 in the subsequent machine unit 9 is particularly important when the two sides of the material web 1 have different material properties and the position of the side is effective in further processing.

In contrast to the known solutions, this can be achieved here with only one secondary unwind 3, which greatly reduces the effort.

If, as shown in the figure, the subsequent machine unit 9 is located to the left of the secondary unwind 3, the clockwise unwinding results in the upper side of the material web 1 pointing downwards when the subsequent machine unit 9 is reached. The material web 1 points upwards when it is unwound in the counterclockwise direction.

The diameter of the reel 7 and therefore the degree of unwinding is detected by a distance sensor.

If the unwinding of the secondary unwinding device 3 and thus the diameter of the reel 7 reach a predetermined value, the web of material 1 coming from the secondary unwinding device 3 is connected and glued by one of the

glue separators

5, 6 to the web of material 1 of the new complete reel 7 of the primary unwinding device 2.

In addition, the

adhesive separating device

5, 6 separates the material web 1 coming from the secondary unwinding device 3 before the connection point.

The drive of the secondary unwinding device 3 then drives the reel 7 briefly against the unwinding direction in order to wind up the paper flag hanging after cutting off the end of the outgoing web.

Adhesive separating devices

5, 6, known per se and responsible for connecting the web ends, are located below the primary unwinding device 2 and are vertically adjustable to adapt to the changing diameter of the complete reel 7.

Alternatively, different splicing methods can be implemented by means of two

glue separators

5, 6 for connecting the end of the web 1 of material to be run off (or to be unwound) of the secondary unwind 3 to the starting end of the web of a new reel 7 of the primary unwind 2.

For this purpose, fig. 2 shows an adhesive separating device 5 which is responsible for the butt-splicing method, in particular for thick paper webs, and when changing reels, the end of the material web 1 which is to be run off is connected to the beginning of the web of a new reel 7 without stacking, i.e. without overlapping of the two material webs 1.

According to fig. 1 and 2, the adhesive separating device 5 (for butt splicing) comprises as a basic component a stationary web holding device with two holding

elements

13, 14, which are spaced apart from each other by approximately 50mm in the web running direction 8. Each holding

element

13, 14 has a holding surface which extends parallel to the material web 1 and transversely over the maximum web width and by which the material web 1 can be held.

The two holding

elements

13, 14 are preferably suction boxes that can be subjected to underpressure, the walls of which facing the material web 1 have suction openings as holding surfaces for sucking the material web 1 and thus holding it.

In the region of the web holder, a separate adhesive element 4 is arranged on the other side of the material web 1, on which the separate adhesive element 4 is pivotably supported. The material web 1 can be separated by a circular knife via a carriage of the adhesive separating element 4, which carriage can be moved transversely to the web running direction 8, and can be adhered by adhesive tape.

Preferably, a second adhesive tape applicator is arranged in the gap between the two holding

elements

13, 14, which second adhesive tape applicator is fixed to a carriage that is movably supported transversely over the working width. The web ends are thus bonded to the web start of the new roll bilaterally, i.e. on both sides of the web.

Not shown are further elements which take up the starting end of the web from the circumference of the completed reel 7, in particular in the form of suction pipes, and transport it to the rear of the area of the web holding device.

The butt-splicing process is performed substantially when the entire reel 7 is stopped, and can be performed regardless of the intended unwinding direction of the reel 7.

In contrast, fig. 1 and 3 show an adhesive separating device 6 which is responsible for the dynamic splicing method.

The (dynamic splicing) adhesive separating device 6 of the unwinding station comprises an adhesive bracket holding an adhesive roll.

A cutting device is also mounted on the adhesive carrier, said cutting device having a stripping knife preferably provided with teeth.

To connect the two web ends, as shown in fig. 3, adhesive is applied to the complete and rotating reel 7, the material web 1 of the secondary unwind 3 is pressed onto the complete reel 7, and the web 1 is separated between the adhesive point and the secondary unwind 3.

Fig. 3 shows a preferred unwinding device, in which the upper side of the material web 1 points upwards. Since no additional web tensioning problems occur here, the splicing process can be carried out with a rotational speed of the complete reel 7 of the primary unwinding device 2 of between 0.1 and 4 m/s.

In order to be able to carry out both joining processes, the unwinding station has, as shown in fig. 1, a holding device 10 for accommodating the adhesive separating device 5 to realize the butt splicing principle and a second holding device 11 for accommodating the adhesive separating device 6 to realize the dynamic splicing principle.

The unwinding station according to the invention thus allows to select the splicing method that is most suitable for the machine and/or the material web 1.

Alternatively, the plant operation can also be carried out with only one

adhesive separating device

5, 6 and subsequently be retrofitted.

In addition, in the event of failure or maintenance of one

adhesive separating device

5, 6, additional adhesive separating devices can be used, which greatly reduces the down time.

In order to make maintenance and repair of the

adhesive separating devices

5, 6 easy and even possible to maintain and repair the

adhesive separating devices

5, 6 while the machine is running, at least the main elements of the

adhesive separating devices

5, 6 can be moved axially, i.e. perpendicularly to the web running direction 8, out of their

holding devices

10, 11 and thus out of the hazardous area of the unwinding station.

Since the adhesive separating device 5 for butt splicing in particular has complicated components, there is often a need for maintenance and repair. In addition, the tape needs to be replaced.

In order to minimize the effort, the two

adhesive separating devices

5, 6 use a plurality of turning rolls 12 for jointly guiding the paper web.

In order to simplify the transfer of the already largely unwound reel 7 to the secondary winding device 3, two reel drives are arranged on different sides of the machine. In particular, the larger drive for the primary unwinding device 2 of the entire reel 7 is on the machine side, while the smaller drive for the reel 7 of the secondary winding device 3 already mostly unwound is on the operator side of the machine, accessible to the operator.

It is essential that the drives of the secondary unwind 3 remain coupled to the reel 7 after reception until the unwinding is finished, i.e. the unwinding station requires only two drives. In addition, the larger drive of the primary unwind 2 is stationary and only the smaller drive can be moved, which simplifies the construction.

The web tension is adjusted throughout the process, thereby inhibiting winding errors.

Claims

1. An unwinding station for unwinding a material web (1) for a subsequent machine unit (9) for processing the material web (1), having a primary unwinding device (2), at least one secondary unwinding device (3) and at least one adhesive separating device (5) carried by a holding device for implementing the butt-splice principle, characterized in that at least one element of the adhesive separating device (5) for butt-splicing can be axially removed from its holding device (10, 11) and/or can be unlocked from its holding device (10, 11) by a quick-lock device.

2. Unwinding station according to claim 1, characterized in that at least the adhesive separating device (5) for butt splicing is axially removable from its holding device (10, 11) and/or unlocked from its holding device (10, 11) by means of a quick-lock device.

3. Unwinding station according to claim 1 or 2, characterized in that there is a further adhesive separating device (6) carried by its own holding device.

4. Unwinding station according to claim 3, characterized in that all adhesive separating devices or at least one element of each of all adhesive separating devices can be axially removed from its holding device (10, 11) and/or unlocked from the holding device (10, 11) by means of a quick-lock device.

5. Unwinding station according to claim 1 or 2, characterized in that the unwinding station has only one secondary unwinding (3).

6. Unwinding station according to claim 3, characterized in that a plurality of adhesive separating devices jointly use at least one turn roll (12) for web guidance.

7. Unwinding station according to claim 1 or 2, characterized in that the primary unwinding device (2) is stationary and the secondary unwinding device (3) is supported movable towards the primary unwinding device (2) for an uptake reel (7).

8. Unwinding station according to claim 1 or 2, characterized in that the subsequent machine unit (9) in the web running direction (8) is designed as a calendering device or a coater.

9. The unwinding station according to claim 1, characterized in that the material web is a paper or paperboard web.

10. Unwinding station according to claim 8, characterized in that the machine units (9) following in the web running direction (8) are designed as roll cutters.