CA2340538A1 - Apparatus and method for forming a block of folded material - Google Patents

Apparatus and method for forming a block of folded material Download PDF

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Publication number
CA2340538A1
CA2340538A1 CA002340538A CA2340538A CA2340538A1 CA 2340538 A1 CA2340538 A1 CA 2340538A1 CA 002340538 A CA002340538 A CA 002340538A CA 2340538 A CA2340538 A CA 2340538A CA 2340538 A1 CA2340538 A1 CA 2340538A1
Authority
CA
Canada
Prior art keywords
block
web
end portion
sledge
layer
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.)
Abandoned
Application number
CA002340538A
Other languages
French (fr)
Inventor
Thomas Sander
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gevas Verpackungsmaschinen GmbH
Original Assignee
Gevas Verpackungsmaschinen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gevas Verpackungsmaschinen GmbH filed Critical Gevas Verpackungsmaschinen GmbH
Publication of CA2340538A1 publication Critical patent/CA2340538A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00Folding thin material
    • B65H45/02Folding limp material without application of pressure to define or form crease lines
    • B65H45/06Folding webs
    • B65H45/10Folding webs transversely
    • B65H45/101Folding webs transversely in combination with laying, i.e. forming a zig-zag pile
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/40Type of handling process
    • B65H2301/42Piling, depiling, handling piles
    • B65H2301/421Forming a pile
    • B65H2301/4216Forming a pile of web folded in zig-zag form
    • B65H2301/42162Juxtaposing several piles

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Making Paper Articles (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

An apparatus and a method for forming a block (5) of folded material are provided, whereby the apparatus comprises means (2, 3) for folding a web (4) to a block (5), means (10) for holding an end (7, 7') of the web (4) from the bottom layer of the block (5) and an automatic cutting mechanism (9, 11, 13) for providing an end portion (14) from the uppermost layer of the block (5). According to the method a web (4) on a receiving element (6) is folded until a portion of the web (4) forms a block (5) of de-sired height and the uppermost web layer is fed to a cutting mechanism (9, 11, 13).
Then the uppermost web layer is cut and the end portion (7, 7') from the bottom layer of the block (5) is at least partly laid on top of the block (5). Due to the inventive appa-ratus and method it is possible to automatically handle web material for forming a block without manual operation, which is particularly important for hygienic products.

Description

Apparatus and method for forrnin~ a block of folded material The present, invention refers to an apparatus and a method for forming a block of folded material.- Such an apparatus and method are preferably used in the produc-tion of festooned packages which are in particular used in the hygienic industry whereby the web can be made of non-woven fabric or airlaid material.
WO 98/58864 discloses a package of festooned web material which is cut into sev-oral stacks, whereby the end of each stack is accessible for connection with another end portion of a stack. In order to provide a free end portion from the bottom of the stack, a strip portion is pulled from underneath the stack. This operation to :provide a free end portion has to be carried out manually which means that someone has to grip the end portion and an-ange; it in the preferred position. This is a serious; incon-venience since the festooned h~ackages are preferably used in the hygienic;
industry where clean handlini; of the -material is crucial and the elimination of manual op-erations is always considered as a high benefit. In addition, for being able to pull out a strip from the bottom of the stack, it is required to flip the festooned block, which is a time-consuming procedure.
Accordingly, it is the object o:F the present invention to provide an apparatus and a method for separating the web from a block of folded material which can be used for hygienic products and which are more effective in handling the web after the festooning of one block is completed.
This object is solved by an apparatus having, the features of claim 1 and a method comprising the features of cl,:rim 9.
Due to the fact that the apparatus comprises means for holding an end of the web from the bottom layer of the block and an automatic cutting mechanism for provid-ing an end portion from the uppermost layer of the block, manual handling of the web is eliminated during the ~,vhole process. This is particularly important for the production of materials intended for use in hygienic products like diapers and other sanitary products. In addition, the automatic handling of the web reduces downtime of the production line and thus increases the efficiency. Holding means are inte-grated in the apparatus so that the end portion from the bottom layer can be laid on top of the block without flipping; tine whole block of material.
According to a preferred embodiment of the invention the holding means comprise a roller for winding and umvinding a portion of the web. This allows effective han-dung of the web due to the fact that, with the increasing height of the block being formed, also the length of the end portion increases as required, so that a continuous unwinding of the end portion helps to avoid loose end portions hanging around.
If the block is fozzned on a receiving element which is movable in horizontal di-rection to an adjacent processing station, the downtime of the folding mechanism can be minimised during the cutting operation. Alternatively, it is possible to use a conveyor to release the block of folded material in horizontal direction.
For effective and highly accurate cutting of the web, the cutting mechanism com-prises a sledge and a cuttin' knife being movable on the sledge. The knife can be rolled on the web contacting the sledge to cut the web so that the material stress is minimized during the ccittin'; operation. In order to obtain a clean cut, a clamping bar can be provided for f ~in~a web portion on the sledge.
According to a preferred embodiment, the holding means comprise a needle roller having protruding needles which are inscrtable into the web. This enables the appa-raW s to handle the web without an additional clamping mechanism which would in-crease the risk of daznagin~ the material. The protruding needles can be small enough in diameter to avoid ~in:~ damage, since the web of airlaid material or non-woven fabric is relatively li~llt In order to avoid damage of the needles during rotation of the needle roller, the sledge is provided with notches through which the needles of the needle roller can pass during its rotation. This guarantees that the needles are not in contact with the sledge which could cause the breaking of a needle and require to dispose the whole block of web material, if a broken hart of the needle gets into the block.
In order to assure removing of the web portion during unwinding of the roller, strip-off means are provided adjacent to the roller of the holding means, to facilitate the final release of the weh from the roller.
According to the invective nuethod the web is folded on a receiving element until a portion of the web is layered in form of a block of desired height. At this moment, the uppermost web layer is fed to a cutting mechanism and is cut, whereby the end of the bottom layer is laid at least partly on top of the block.
According to a preferred eml.~odiment of the inventive method, an end portion from the bottom layer of a block is withheld on a holding means before starting the formation of the block so that during block formation the holding means can hold a sufficient part of the web to arrange an end portion at the side of the block, since the height of the block increases during the block formation.
In order to assure that the end ;portion from the bottom of the block is laid down on top of the block, the block is moved in horizontal direction so that the holding and releasing of the end portion rcaults in laying down the end portion on top of the block.
Preferably, the uppermost web layer is cut and its end portion falls down on one side of the block. In particular if the web is perforated so that different lines of the web can be pulled from the festooned block, it is preferred to connect the different lines of the block of folded material. Such a splicing operation can only be carried out when the connecting portions have the required length, as pulling off the end portions from the stack could damage the web.
The invention will now be dcsc:ribed in detail with respect to the appended drawings showing an embodiment of the apparatus and the method according to the inven-tion.
Fig. 1 is a schematic side view of the inventive apparatus according to a first embodiment;
Fig. 2 is a schematic side view showing a beginning of the method for provid-ing loose end connecting portions on top of a block of folded material;
Fig. 3 to 9 show different steps of the method for forming a block with loose ends arranged partly on top of the block;
Fig. 10 is an enlarged side view of the main parts of the means for handling the web, and Fig. 11 is a top view on the: sledge and the needle roller of the inventive appa-r atLlS.
As shown in Fig. 1 the apparat~.is for forming a block of folded material comprises a frame 1 to which a left folding cylinder 2 and a right folding cylinder 3 are mounted. Between the folding cylinders 2 and 3, a web 4 of airlaid material passes whereby the web 4 is gripped ~.nd folded by a rotation of the folding cylinders 2 and 3 to form a block 5. The block 5 is arranged on a receiving element 6 which is mov-able and preferably formed as a lifting element. The bottom layer of the block 5 has an end portion 7 which is withheld by a tail bolding roller 8. On the upper left side of the block 5 a sledge 9 is provided, which is movable in horizontal direction. The sledge 9 is guided on a rail system and moved by an electric drive system (not shown).

On the upper right side of thc; block 5 a needle roller 10 is provided. Belo~~
the nee-dle roller 10 a clamping bar 11 is provided which is movable in horizontal direction.
Before starting with the cutting operation for block 5, the finished block 1:?
is re-5 moved from~the position shown in Fig. 1.
The starting position for separating the web from a block 5 of folded material is shown in Fig. 2.. In the beginning, the block 5 is moved horizontally from the receiving element 6, so that the Mock 5 passes under the tail holding roller 8 and the end portion 7 is laid down on top of the block 5 (F'ig. 3). The horizontal movement of block 5 can either be achieved by moving the receiving element 6 or by using per se known conveyor means.
As shown in Fig. 4, the block 5 is completely moved beyond the tail holding roller 8 1 S so that the end portion 7 from the bottom layer of block 5 is arranged on top of the block 5.
Then the sledge 9 begins to move under the folding cylinders 2 and 3 to the clamp-ing bar 1 1. Simultaneously, the tail holding roller 8 is moved in the same direction as the sledge (Fig. 5).
In order to cut the web 4, the sledge 9 is moved under the needle roller 10 and the clamping bar 11 clamps a portion of the web to the sledge 9 (Fig. 6). In this posi-tion, the needle roller 10 rotates so that at least some needles are inserted into the web and falling down of the web 4 after cutting is avoided. Then a cutting clement 13 is moved on tle sledge 9, separating the web 4 at this position. The cutting ele-ment 13 can comprise a rolling knife in order to reduce frictional engagement of the cutting element 13 on the sledge 9. At the cutting area, the sledge 9 is made of hardened steel to reduce the wE;ar of this part.
As shown in Fig. 7, an end poc-tion 14 is provided after cutting the web 4.
Both end portions 7 and 14 are laid down at least partly on top of the block 5, so that they can ~) easily be detected and gripped t-or fimther processing of the folded web. The other part of the web 4 forms another end portion 7' which is fixed to the needle roller 10.
The sledge 9 returns from the position under the needle roller 10 to the original po-S1t10I1 S110wI1 111 Flg. 2.
As shown in Fig. 8, the needle roller 10 turns around its axis to provide an end por-tion 7'of sufficient length before starting to build another block. This winding pro-cess is followed by the foldin)~ cylinders which release a sufficient portion of the web. In addition, the tail holding roller 8 is moved to the left side under tlue needle roller 10.
In Fig. 9 the stal-ting position for forming a new block of folded material is shown.
The new end portion 7' front the bottom of the new block is partly unwound from the needle roller 10 and hangs between the needle roller 10 and the tail holding roller 8. Due to the rotation of the folding cylinders 2 and 3, the new block is built and the receiving element f> moves downward, pulling a part of the end portion 7' on the side of the new block. ~~fter forming the new block, the same position as shown in Fig. 2 is reached and a new cycle begins.
In Fig. 10 an enlarged view of the main parts of the cutting system is shown in the position similar to Fig. 7. The cutting element 13 is provided with a cutting edge 21 contacting the hardened surface of the sledge 9. The web is clamped between the sledge 9 and the clamping bar )',1.
The needle roller 10 comprises recessions 22 with needle holders 16 in which nee-dles 15 are mounted, protruding in an inclined direction with respect to the;
radial direction. The needle roller 10 comprises a cylinder 17 in which the recessions 22 are integrated for locating the needle holders 16. A rotation of the needle roller 10 results in an insertion of some needles 15 into the web 4. This ensures holding of the web 4 by the needle roller 10.

As shown in Fig. 1 1 the sledge ~' disclosed on the bottom side comprises notches 18 which are slightly wider than the diameter of the needles 15. On the upper side of Fig. 11 the needle roller 10 is shown. During the rotation of the needle roller 10, the needles 15 pass through the notches 18, so that a contact of the needle 15 with the sledge 9 is avoided. As the web 4 is withheld between the sledge 9 and the needle roller 10, the needles 15 are inserted into the web 4. As can be seen in Fig.
11, the sledge 9 is driven by belts 19 and 20 which are engaging two toothed wheels driven by a motor (not shown).
In a further embodiment of the apparatus, strip-off means are arranged at the needle roller 10 to assure that the web is released when the needle roller 10 rotates in an unwinding direction. '7,he strip-off means can be made of one or more rollers guid-ing the web 4 in the desired direction.

Claims (13)

1. Apparatus for forming a block (5) of folded material, comprising means. (2, 3) for folding a web (4) to a block (5), means (10) for holding an end (7, 7') of the web (4) from the bottom layer of the block (5) and an automatic cutting mecha-nism (9, 11, 13) for providing an end portion (14) from the uppermost layer of the block (5).
2. Apparatus according to claim 1, characterised in that the holding means com-prise a roller for winding wand unwinding a portion of the web (4).
3. Apparatus according to claim 1 or 2, characterised in that the apparatus com-prises a receiving element (6) on which the block (5) is formed whereby the receiving element (6) is movable both in vertical and in horizontal direction.
4. Apparatus according to one of claims 1 to 3, characterised in that the cutting mechanism comprises a sledge (J) and a cutting knife (21) being movable on the sledge (9).
5. Apparatus according to one of claims 1 to 4, characterised in that the cutting mechanism comprises a clamping bar (11) for fixing a web portion on the sledge (9).
6. Apparatus according to one of claims 1 to 5, characterised in that the holding means comprise a needle roller (10) having protruding needles (15) which are insertable into the web (4).
7. Apparatus according to one of claims 1 to 6, characterised in that the sledge (9) is provided with notches (18) through which the needles (15) of the needle roller (10) can pass during its rotation.
8. Apparatus according to one of claims 1 to 7, characterised in that strip-off means are provided adjacent to the roller (10) of the holding means for removing the web (4) from the roller (10).
9. Method for forming a block (5) of folded material providing loose ends (7, 14) accessible for connection comprising the following steps:
- folding of a web (4) on a receiving element until a portion of the web forms a folded block (5) of desired height;
- feeding the uppermost web layer to a cutting mechanism (9, 11, 13);
- cutting the uppermost web layer to form an end portion (7, 7');
- laying the end portions (7, 7') from the bottom layer of the block (5) at least partly on top of the block (5).
10. Method according to claim 17, characterised in that an end portion (7) from the bottom layer of the block (5) is withheld on a holding means (10) before starting to form the block (5).
11. Method according to claim 10, characterised in that the end portion (7) being withheld on the holding means (10) is umwound during the foaming of the block (5).
12. Method according to one of claims 9 to 11, characterised in that after forming of the block (5) the receiving element (6) is moved in horizontal direction and the end portion (7) from the bottom layer is laid on top of the block (5).
13. Method according to one of claims 9 to 12, characterised in that the uppermost web layer is cut and its end portion (14) falls down on one side of the block (5).
CA002340538A 2000-03-31 2001-03-13 Apparatus and method for forming a block of folded material Abandoned CA2340538A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EPPCT/EP00/02873 2000-03-31
PCT/EP2000/002873 WO2001074698A1 (en) 2000-03-31 2000-03-31 Apparatus and method for forming a block of folded material

Publications (1)

Publication Number Publication Date
CA2340538A1 true CA2340538A1 (en) 2001-09-30

Family

ID=8163893

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002340538A Abandoned CA2340538A1 (en) 2000-03-31 2001-03-13 Apparatus and method for forming a block of folded material

Country Status (6)

Country Link
US (1) US20010025869A1 (en)
AT (1) ATE266595T1 (en)
AU (1) AU4292500A (en)
CA (1) CA2340538A1 (en)
DE (1) DE60103200T2 (en)
WO (1) WO2001074698A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3064938A1 (en) * 2017-04-07 2018-10-12 Compagnie Generale Des Etablissements Michelin THE STACKING OF RUBBER MIXTURE PATCHES

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2450776A1 (en) * 1979-03-09 1980-10-03 Rhone Poulenc Textile METHOD AND DEVICE FOR BAMBANING CABLE OF TEXTILE FILAMENTS
EP0910542B1 (en) * 1997-06-19 2000-04-26 Stac Pac Technologies Inc. Packaging a strip of material
US6009689A (en) * 1998-02-17 2000-01-04 Stac-Pac Technologies Inc. Packaging a strip of material in layers

Also Published As

Publication number Publication date
AU4292500A (en) 2001-10-15
ATE266595T1 (en) 2004-05-15
DE60103200T2 (en) 2005-05-19
WO2001074698A1 (en) 2001-10-11
US20010025869A1 (en) 2001-10-04
DE60103200D1 (en) 2004-06-17

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Legal Events

Date Code Title Description
FZDE Discontinued