EP3129312A1

EP3129312A1 - Device and method for feeding material webs to a processing device

Info

Publication number: EP3129312A1
Application number: EP15713782.9A
Authority: EP
Inventors: Henning RÖTTGER
Original assignee: Glatfelter Falkenhagen GmbH
Current assignee: Glatfelter Falkenhagen GmbH
Priority date: 2014-04-07
Filing date: 2015-04-07
Publication date: 2017-02-15
Also published as: KR20160141794A; DE102014206706A1; US20170129730A1; WO2015155192A1; CA2948412A1; RU2016143178A3; CN106458489A; RU2016143178A; JP2017518444A

Abstract

The invention relates to a delivery device (10) for feeding flat material webs (34), for example airlaid products, wetlaid products, nonwovens, or films, to a processing device, having a splicing unit (12) and a multiweb unwinding device (14). The splicing unit (12) is designed to connect a fiber web end of a previous individual fiber web (34) to a fiber web beginning of a subsequent individual fiber web (34) in order to allow a thus non-interrupted fiber web to be fed to the processing device. The splicing unit (12) is further designed to process airlaid fiber webs (34) which are wound on winding cores (24, 26) and thus prefabricated as rolled material. The multiweb unwinding device has at least two winding core holders which can be fitted independently of each other. Each of the winding core holders can receive multiple comparably narrow rolls with narrower individual fiber webs or alternatively also a comparably wider roll (20, 22) with a wider multifiber web (28, 30) which is perforated in the unwinding direction (14). The wider multifiber web (28, 30) can be separated into multiple individual fiber webs (34) on the basis of the perforation (32) by detaching (Fig. 2) along the perforation such that, as a result, fiber webs (34), which are as narrow as the fiber webs made possible when using correspondingly narrow rolls with narrower individual fiber webs, are fed to the splicing unit (12).

Description

Apparatus and method for feeding material webs to a further processing device

The invention relates to a delivery device for feeding material webs, such as e.g. Films and in particular fiber webs of wet or dry-laid fiber material (nonwoven), such as wet-laid, paper or airlaid fiber webs to a further processing device and a method for feeding airlaid fiber webs to a further processing device.

Airlaid fiber webs are used, for example, in the manufacture of diapers, incontinence articles, sanitary napkins, panty liners or the like. used. For this purpose, the airlaid fiber webs are delivered in roll or bale shape (block form) and then cut and further processed, for example laminated or the like for further processing by a corresponding further processing device of the roll or the bale-folded fiber web.

Airlaid fiber webs are a nonwoven material in which the fibers are deposited (almost) dry on a belt with the aid of a stream of air to form a fibrous web. In wetlaid fiber webs, the fibers are for example kept in liquid distributed and drawn from the liquid, eg water. Airlaid fiber webs are produced, for example, in a dry-laid process as a nonwoven fabric, as described, for example, in WO 86/000097 A1 or EP 0 194 607 A2.

If the material web is delivered in rolls, that is to say as rolls, the roll must be changed again and again, if the fiber web is completely changed from a respective roll. This results in the problem that a single roll typically contains 800-1000 running meters of fiber web and is unwound at a take-up speed of up to 400 m / minute, so that a respective role is already completely settled after 2-3 minutes and then the remaining, empty Winding core of the role has to be replaced against a full role and must be connected by a splice. A further disadvantage of rolls is that there is the danger of so-called "telescoping", in particular in the case of narrow fiber webs and correspondingly narrow rolls, ie the winding layers of the wound fiber web can slide off the roll laterally Spooling can also be used for this process, which means that even narrow fiber webs can be processed and the run length per spool is considerably higher than for single reels, which significantly reduces the number of spooling cycles.The disadvantage is that the production of the reels is another requires separate process step, thereby significantly increasing the manufacturing costs (10 to 30%).

Alternatively, the material web can also be delivered in a bale shape as a block, which is produced by reciprocally depositing the material web. This reciprocating laydown is also referred to as garland-like zigzag laying (English: festooning) and results in compact blocks or bales, which contain a greater web length compared to rolls with similar storage space. The production of such block goods is described for example in DE 102 27 653. The removal of the fibrous web is then carried out by the so-called defestooning or slabs. Similar to spooling, the block product offers the advantage of providing greater length of fibrous web for a given package volume. This is offset by higher production costs, because block products (in comparison to rolls) require, in addition to spooling, an additional production step of finishing using a festooner (approximately 10 to 30% increased production costs). In addition, the danger of twisting the fibrous web during storage results in blockware. Also, block fabric is poor in ply material, ie, if the fibrous web is a nonwoven fabric, which is upper Layer (upper layer) has a different material composition or embossing than in a lower layer (lower layer). Due to the zigzag-shaped deposition process, the mechanical stress on the fibrous web is relatively high, which requires a minimum strength and elongation. Even with relatively kink-resistant materials Festooning is problematic, since the kink is not completely removed during tabling and leads to problems during processing.

Against this background, it is an object of the invention to provide a solution which offers the advantages of spooling and festooning, which avoids the additional process steps (costs) associated with spooling and festooning and, moreover, for the processing of narrow fiber webs and rigid materials, or Materials with low strength and elongation, is suitable. According to the invention, on the one hand, a delivery device for feeding material webs to a further processing device is proposed, which has a splicing unit and a multi-web unwinding device. The splicing unit is designed to connect a material web end of a preceding individual material web to a material web beginning of a subsequent individual material web in order to be able to supply the further processing device with a non-interrupted material web. The splicing unit is also designed to process wound on winding cores and thus finished as a roll material webs, such as films and in particular webs of nonwoven, such as wetlaid or Airlaid- fiber webs. The multi-web unwinding device has at least two independently packable winding core holders. Each of the winding core holders can accommodate a plurality of comparatively narrow rolls with narrower individual material webs or alternatively also a comparatively wider roll with a wider multiple material web perforated in the unwinding direction. Due to the perforation, the wider multi-material web can be separated along the perforation into a plurality of individual material webs so that as a result narrow material webs are fed to the splicing unit, as is possible in the case of correspondingly narrow rollers with narrower individual webs. When using perforated Mehrfachmaterialbahnen the advantage is that they can be produced in the production process of the web (eg Airlaid, carded web, spunbond or film) without an additional process step in-line or while wrapping, creating additional effort, as he Festooning or Spooling occurs, is avoided.

Such a delivery device offers the advantage that the multi-web unwinding device can be fitted with two independently-storable winding core holders has, which can be equipped in each case so that each winding core holder carries a plurality of wound single material webs next to each other when fully loaded. The juxtaposed individual material webs may be present in the form of separate individual rolls or preferably in the form of a perforated Mehrfachmaterial- web. Whenever a single material web is used up, the splicing unit can be supplied in the shortest possible time to the beginning of a new single material web from the other winding core holder, so that an extremely fast change is possible from single material web to single material web of all provided on the two hub supports of the multi-web unwinding single material webs , If all provided individual material webs are used up on a respective winding core holder, new individual material webs can be rapidly provided, preferably in the form of a correspondingly wider multiple material web. Such a re-fitting of the winding core holder must be carried out correspondingly less frequently, depending on the capacity of the winding core holders, than the replacement of the individual rolls in the prior art. Thus, it is possible to use the preferred for technological and manufacturing reasons role product, without the otherwise according to the prior art associated disadvantages (frequent roll change) to accept.

To achieve the aforementioned object, a method for supplying airlaid webs to a further processing device is proposed, according to at least two hub supports each wound on winding cores and thus finished as a roll fabric Airlaid material webs either in the form of several, relatively narrow roles with narrow Single webs or in the form of a comparatively wider role with a perforated in the unwinding wider Mehrfachmaterialbahn be provided, whereby the wider multi-material web can be separated by severing along the perforations of multiple individual material webs. The use of the wider perforated multiple material web offers the advantage that even very narrow webs, which can not be produced as a single roll, can be processed. According to this method, the individual material webs are unwound alternately from one or the other winding core holder and a respective material web end of a preceding single material web with a web start and a subsequent single material web by splicing connected so that the further processing device is fed to a non-interrupted material web. Preferably, the delivery device has more than two winding core holders and each winding core holder associated with a material web storage. A respective winding core holder and the material web storage associated with it, if appropriate, together with further components together form an unwinding unit and are part of a respective unwinding device. The material web storage can have as essential components, for example, one or more tension rollers. A delivery device can thus be formed by in each case one splicing unit and a plurality of unwinding units assigned to this splicing unit.

Preferably, the multi-web unwinding device has a total of four independently rechargeable core supports. In this way, it is possible that the splicing of two of the winding core holders alternately a single material web is fed, while the other two winding core holders can be equipped, for example, with new full web rolls. Thus, the continuous, so uninterrupted delivery process for Weiterverarbeitungsein- direction can be further extended because individual webs of the two other web rolls already the splice unit can be supplied before the empty hubs and the empty web rolls were taken from the corresponding two winding core mounts and replaced by new full web rolls were. The replacement of the empty hubs against full web rolls can thus be done while the splice unit individual webs are fed from the other two web rolls on the two additional hub supports. The time span for the multi-material web change process is significantly extended compared to the running time of a single material web, since it is no longer the transit time of the last individual material web on one side that determines the maximum changeover time. Preferably, the winding core holders are each paired with each other in alignment and arranged parallel to each other, that is, two mutually aligned winding core holders are two other, also aligned with each other winding core mounts parallel. Approximately in the middle between all hub supports the splice unit is preferably arranged. Alternatively, it is also possible for the feeding device to have a central splicing unit in combination with another, in particular odd, number of winding core holders. The winding core holders and corresponding unwinding devices can also be arranged parallel to one another.

Preferably, the multi-web unwinding device has a plurality of tensioning rollers, which are arranged so that they hold a respective unwinding individual material web tensioned with a defined force. This is advantageous in particular because the individual material webs arranged side by side on a material web roll are joined together, so that overall a first relatively large and in the course of production decreasing rotating mass results and because the web rolls depending on which web roll just a single material web is removed, regularly braked and accelerated again. Since this can lead to irregularities in the peripheral speed of a respective single material web winding, tension rollers are advantageous, which absorb these fluctuations. Tension rollers and the associated hub support each form an unwinding device. The invention will now be explained in more detail using an exemplary embodiment with reference to the figures. From the figures shows

Fig. 1: A side view of a delivery device according to the invention;

2 shows a plan view of a delivery device according to the invention; and

Fig. 3: a plan view of a delivery device with separately positioned

Splice unit that allows a parallel arrangement of several unwinding units

The delivery device 10 illustrated in FIGS. 1 and 2 has a splicing unit 12 and a multi-web unwinding device 14 with winding core holders 16 and 18, which in the example shown are each equipped with a fiber web roll 20 and 22. Each of the fiber web rolls 20 and 22 has in each case a winding core 24 or 26, on each of which a perforated multiple fiber web 28 or 30 is wound. Each of the multiple fiber webs 28 and 30 is provided with perforations 32, along which the respective multiple fiber web 28 or 30 can be separated into a plurality of individual fiber webs 34. The fiber webs 34 are thus in roll form in the form of a perforated, wider multi-fiber web. The exemplary embodiments relate in each case to a delivery device for feeding airlaid fiber webs to a further processing device. In the exemplary embodiments, the material webs are thus airlaid fiber webs. However, the embodiments apply correspondingly for delivery devices for films or other flat fiber webs, eg: wetlaid fiber webs or paper.

As can be seen from FIG. 2, the left-hand fiber web roll 20 carries fourteen individual fiber webs, while the right-hand fiber web roll 22 (only) carries thirteen individual fiber webs. Accordingly, a part of the winding core 26 of the fiber web roll 22 can be seen. As can likewise be seen, the splicing unit 12 is simultaneously supplied during operation with a single fiber web 34 from the left-hand fiber web roll 20 and a second single fiber web 34 from the right-hand fiber web roll 22 in the state shown schematically in FIGS. 1 and 2 A single-fiber web 34 of the left-hand fiber web roll 20 is being unwound and fed to the further processing device, while a beginning of the next single fiber web of the right-hand fiber web roll 22 is already supplied to the splicing unit 12, but only then with one end of the current from the left fiber web roll 20 unwound single fiber web 34 is connected when this end of the single fiber web 34 is reached. Subsequently, the next single fiber web of the right in the figure right fiber web roll 22 is then unwound while a beginning of the subsequent single fiber web of the left left in the figure fiber web roller 20 in the splice unit 12 is available, if the corresponding end of the single fiber web reaches the right in the figure fiber web roll 22 is.

When a single fiber web 34 of the multiple fiber webs 28 and 30 are unwound from the respective winding cores 24 and 26, the winding cores 24 and 26 must be removed from the core supports 16 and 18 and replaced by full fiber web rolls.

Since this takes time, it is advantageous if the delivery device 10 not only has two winding core holders 16 and 18, but instead four winding core holders (ie two winding core holders twice), which are then arranged on the other side of the splicing unit 12. If the two fiber web rolls 20 and 22 are used up, individual fiber webs of fiber web rolls provided on the additional winding core holders can be removed, while ckelkern mounts 16 and 18 are re-equipped. In this way, a production interruption in a reassembly of the hub supports can be shortened to a minimum, ie the uninterrupted delivery process for further processing device is further extended. FIG. 2 indicates how two additional winding core holders can be arranged, namely in such a way that the fiber web rolls arranged on the additional winding core holders are in each case aligned with one of the two fiber web rolls 20 and 22.

The rolls are according to the embodiment in the form of a perforated, wider multi-fiber web, which is wound on a correspondingly wide winding core and which is provided with perforations 32 along which the multiple fiber web can be separated into a plurality of individual fiber webs.

As Figure 1 shows, the multi-web unwinding device 14 has a plurality of tension rollers 36, which have the task to keep the respective single fiber web 34 taut and absorb the fluctuations of the peripheral speed of the respective single fiber web winding described above and compensate. As mentioned above, contains a fiber web roll a plurality of juxtaposed single fiber web wraps, which are connected to each other via perforation and a common hub and have a large, decreasing in the course of pulling the single fiber web flywheel. In order to minimize the associated problems, it is advantageous to increase the inner radius (the outer diameter of the winding core) compared to conventional fiber web rolls.

In the examples, the winding cores 24 and 26 are shown as continuous winding cores, which extend approximately over the entire width of the fiber web rolls 20 and 22 and thus over several individual fiber webs 34 away. Alternatively, it is also possible to provide a separate winding core section for each individual fiber web 34, wherein the winding core sections preferably have a spacing, for example 5 or 10 mm, from each other. This makes it easier to dispose of the respective individual fiber web 34 belonging to the winding core section when a respective single fiber web 34 is used up. A winding core, which consists of several, separate winding core sections, wherein each individual fiber web 34 has its own winding core section, is not shown in the figures. FIG. 3 shows that in principle any number of unwinding units each having a winding core holder and a fiber web store can be assigned to a respective splicing unit 12. In the exemplary embodiment in FIG. 3, there are three winding core holders each equipped with a fiber web roll, and material web memories 38 corresponding to three corresponding tensioning rollers, ie three unwinding units which are assigned to a splicing unit 12 and together form a delivery device 10 'therewith. The three unwinding units together form an unwinding device.

LIST OF REFERENCES

10, 10 'delivery device

12 splice unit

14 multi-web unwinding device 16, 18 winding core mounts

20, 22 fiber web rolls

24, 26 hubs

28, 30 multiple fiber webs

32 perforations

34 single fiber webs

36 tension rollers

38 material web storage

Claims

claims

1. supplier device for feeding flat sheets of material, to a further processing device, characterized in that the delivery device has a splicing unit for connecting a web end of a preceding single material web with a material web start a subsequent single material web to supply the further processing means a non-interrupted material web, wherein the splice unit is formed to process wound on hubs and thus prepared as rolls of material webs, and wherein the delivery device comprises a multi-web unwinding with at least two independently windable core supports, each having a plurality of relatively narrow rollers with narrower individual webs or a relatively wider role with a in Abwickelrichtung perforated wider multi-material web can accommodate, with the wider Mehrfachmaterialbahn d can be separated into several individual material webs along the perforation.

2. Supplier device according to claim 1, characterized in that the delivery device has more than two winding core holders and each winding core holder associated with a material web storage.

3. The delivery device according to at least one of claims 1 or 2, characterized in that the multi-web unwinding device has a total of four independently packable winding core mounts.

4. Supplier device according to claim 3, characterized in that the winding core holders are each arranged in pairs flush with each other and parallel to each other opposite.

5. Supplier device according to at least one of claims 3 or 4, characterized in that the splicing unit is arranged approximately centrally between all four winding core mounts.

6. Supplier device according to at least one of claims 1 to 5, characterized in that the multi-web unwinding device has a plurality of tension rollers, which are arranged so that they hold a respective unwinding single material web stretched with a defined force. A delivery device according to claim 6, characterized in that the tensioning rollers are part of a material web store, each winding core holder being assigned its own material web store.

A method for feeding webs of material to a further processing device, characterized in that at least two winding core holders each wound on winding cores and thus assembled as rolls of material either in the form of several, relatively narrow rollers with narrower individual material webs or in the form of a comparatively wider role with a in the unwinding perforated wider Mehrfachmaterialbahn be provided, wherein the broader Mehrfachmaterialbahn can be separated by separation along the perforation in a plurality of individual material webs, and that individual webs alternately unwound from one or the other winding core holder and a respective web end of a preceding single material web with a material web start a subsequent Single material web is connected by splicing so that the further processing device a non-interrupted fiber web is supplied.