EP2460920B1 - Needling device - Google Patents

Needling device Download PDF

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Publication number
EP2460920B1
EP2460920B1 EP20110186748 EP11186748A EP2460920B1 EP 2460920 B1 EP2460920 B1 EP 2460920B1 EP 20110186748 EP20110186748 EP 20110186748 EP 11186748 A EP11186748 A EP 11186748A EP 2460920 B1 EP2460920 B1 EP 2460920B1
Authority
EP
European Patent Office
Prior art keywords
connecting rod
needling
needling device
movement
product
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.)
Not-in-force
Application number
EP20110186748
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2460920A1 (en
Inventor
Vani Olivo
Paolo Olivo
Nicola Olivo
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.)
Texnology Srl
Original Assignee
Texnology Srl
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Filing date
Publication date
Application filed by Texnology Srl filed Critical Texnology Srl
Publication of EP2460920A1 publication Critical patent/EP2460920A1/en
Application granted granted Critical
Publication of EP2460920B1 publication Critical patent/EP2460920B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/02—Needling machines with needles

Definitions

  • the present invention generally relates to the textile field and relates to machines for the processing of non-woven fabric.
  • the present invention concerns a needling device for products typically composed by one or more layers of loose fibre so as to bind these layers with each in a consistent product.
  • the textile fibre is initially subjected to carding, that is a web is formed, also called card web, which is later layered, that is disposed on more layers overlapped to each other, for obtaining a multi-layered product with the wished thickness.
  • card web also called card web
  • This last one is then typically consolidated by means of a process of needling, that is the needling of the layered webs.
  • the needling operation is not carried out by needling the layers with each other with a fitting yarn, but making a plurality of needles alternately go into and out from the product to be sewn. These needles are appropriately shake so that in their translation in the product they draw with them the fibres for short stretches. In this way these last ones at least partially dispose themselves transversally to the product in consolidation binding the layers with each other.
  • the just mentioned needles are usually connected in bars or boards, that is they are rigidly connected to a support structure so as to form a matrix. These bars are then alternately moved against the product to process so that the needles penetrate into it and are then pulled out from it.
  • the first effect is to cause a loss of precision and setting of the gears which leads to a possibility that the needles have uncontrolled movements in a tangential direction to the plane defined by the product to be processed.
  • Object of the present invention is to at least partially overcome the above described drawbacks by providing a needling device which has a lower execution difficulty than the prior art devices.
  • Another object of the invention is that the needling device is easy to be assembled and mounted and that it does not oblige technicians to long regulations and adjustments.
  • a further object of the invention is to provide a needling device which can be manufactured with cheaper materials than the prior art devices.
  • the needling device according to the invention has to ensure to the needle bar a correct movement also in presence of loads applied thereon which submit it to stress along the advancing direction of the product to be sewn.
  • the needling device according to the invention has to ensure in time the movement stability of the needling bar so that the final product is of excellent quality.
  • Last but not least object is that the needling device according to the invention ensures a production speed not lower than the prior art devices although ensuring a quality of the final product not lower than what obtained by the prior art equivalent devices.
  • it may comprise at least one needling bar movable towards the product to be sewn and provided with a support structure to which a plurality of shaped needles are connected.
  • first connecting rod and at least one second connecting rod may be also present, cooperating with each other and moved in counter-rotation with respect to each other and each one with eccentric stroke in the connecting rod big end.
  • the connecting rods may have the connecting rod small end rotatably anchored to the support structure of the needling bar for alternately moving it along directions incident the web. In this way a penetration movement into the product to be sewn and back, by means of which the needling is obtained.
  • the needling device may comprise at least one first and at least one second conditioning group of the movement of the respective connecting rods interposed between them to mechanically connect them.
  • first conditioning group may be associated to the first connecting rod and, similarly, the second conditioning group may be associated to the second connecting rod.
  • the first conditioning group may have at least one first portion operatively connected to a corresponding second portion of the second conditioning group so as to allow exclusively reciprocally counter-rotating movements of the connecting rod small ends on the support structure.
  • the connecting rod small ends of the two counter-rotating connecting rods may be operatively associated to each other by means of at least two elements connected to each other so as to allow reciprocal movements. These movements are necessary to allow the counter-rotating movements of the connecting rods. However, the same two elements have to prevent non counter-rotating reciprocal movements between the connecting rods.
  • the so obtained needling device is easy to manufacture and to assembly consisting of a lower components number and being the needles movement group connected with the fix structure of the needling device only in one point.
  • the moving masses are limited, so that the motors necessary to move them can have smaller dimensions than those used in the prior art equivalent devices.
  • the mechanical stress on the single component parts are also smaller than those present in the prior art devices so allowing the use of less resistant and cheaper materials.
  • the product is composed by a plurality of overlapped layers of loose fibre material. It is evident that this must not be considered as limiting for other uses.
  • the device 1 according to the invention may be used for consolidating even one single layer of loose fibres, whether textile or of different type.
  • the type of the fibres, in particular, as well as the number and size of the layers in which the fibre material to be sewn is disposed, is not a limit for the application of the device 1 according to the invention.
  • a typical employ example is the consolidation of layered carded webs in the production of panels of non-woven fabric.
  • the above device 1 comprises a needling bar 2 movable towards the product V to be sewn and provided with a support structure 3 to which a plurality of shaped needles 4 are associated. These last ones face the product V .
  • the movement of the needling bar 2 is obtained, as per se known, by means of the cooperation of a first connecting rod 5 with a second connecting rod 6 moved in counter-rotation with respect to each other with eccentric stroke in the connecting rod big end 7 .
  • the needling device 1 comprises motorization means 8 , typically consisting of a motor 9 , operatively connected to the connecting rods 7 .
  • This connection is typically, but not necessarily, fulfilled by means of a reduction box 10 associated to the shaft 9 and from which two crankshafts for the motion transmission 11 to the connecting rods 5 and 6 branch off.
  • the small end 15 of each of the connecting rods 5 and 6 is rotatably anchored to the support structure 3 of the needling bar 2 .
  • the small ends 15 of the connecting rods 5 and 6 are pivoted to the support structure 3 by means of fitting pivots 16 .
  • the eccentric movement of the connecting rods 5 and 6 thus allows to obtain a translating movement of the needling bar 2 towards the product V .
  • the counter-rotation of the connecting rods 5 and 6 allows to balance the negative effects of each one caused by the eccentric movement in the connecting rod big end 7 so as to obtain a regular and, in case of a specular eccentricity, perfectly rectilinear movement of the connecting rods.
  • the needles 4 are therefore subject to an alternate penetration movement into the product V and back.
  • the needling device 1 comprises at least one first 20 and one second conditioning group 21 of the movement of the respective first 5 and second connecting rod 6 .
  • the conditioning groups 20 and 21 are operatively interposed between the connecting rods 5 and 6 and mechanically connect them.
  • the first conditioning group 20 is associated to the first connecting rod 5
  • the second conditioning group 21 is associated to the second connecting rod 6 .
  • the two conditioning groups 20 and 21 moreover, have, respectively, a first portion 23 and a corresponding second portion 24 operatively connected so as to allow exclusively reciprocally counter-rotating movements of the small ends 15 of the connecting rods 5 , 6 on the support structure 3 .
  • the needling device 1 is simple to be manufactured. As observable, moreover, not only the motorization means 8 are minimized with respect to the prior art, but also the increase of the masses to be moved is minimum. Also the materials used for the manufacturing of the device 1 may be poorer, or, however, the thicknesses of the parts in movement, starting from the gears, may be reduced.
  • the mounting of the device 1 according to the invention is simplified. It is in fact pointed out that whereas in the prior art equivalent devices the stabilization of the needling bar in the direction of the advancement of the product to be sewn takes place by means of means associated to the fix structure of the device, in the device 1 according to the invention the stabilization takes place by means of the conditioning groups 20 , 21 acting between the connecting rods 5 and 6 which have no connection with the fix structure. This not only allows to have smaller moving masses than the prior art, but also to avoid adjustments of the device 1 upon mounting. All movable parts of the needling device 1 according to the invention, in fact, are associated to the fix structure in a single point and not in more points as in the prior art equivalent devices, so that upon assembling it is not necessary to proceed with adjustments and long and expansive regulations.
  • the first 20 and the second conditioning group 21 respectively comprise a first shaped body 25 and a second shaped body 26 each one having a first end 27 and 28 unitary with the respective connecting rod small end 15 .
  • the conditioning groups 20 and 21 are manufactured in a single body with the respective connecting rods 5 and 6 , but this is only an embodiment and must not be considered as limiting for different embodiments of the invention where the conditioning groups are anchored to the respective connecting rods and not manufactured in a single body. Moreover, they may be of different manufacture from each other or made by means of leverages.
  • a gear 30 susceptible to allow only the above mentioned counter-rotating movements is interposed between the first portion 23 of the first conditioning group 20 and the second portion 24 of the second conditioning group 21 .
  • the gear 30 includes a first rack 31 connected to the first portion 23 and engaging with a second rack 32 associated to the second portion 24 .
  • the two racks 31 and 32 are arc shaped, and the bending centre of the arcs defined thereby substantially corresponds to the connection 16 to the support structure 3 of the respective connecting rod small end 15 .
  • the racks 31 and 32 perform, during the movement of the respective connecting rods 5 and 6 , a movement along respective circumference arcs tangent with each other.
  • the racks 31 and 32 allow a reciprocal rolling movement between the first 23 and the second portion 24 of the conditioning groups 20 and 21 .
  • each tooth of each of the racks 31 and 32 has substantially curved side surfaces.
  • the embodiment described as far as here is only a non limiting embodiment of a needling device 1 according to the invention.
  • the first conditioning group 131 is similar to what described for the preceding embodiment, having a first shaped body 125 similar to the preceding one, but elongated.
  • the second conditioning group 121 instead, consists of a cog-wheel 126 unitary with the respective connecting rod 106 .
  • the gear 130 consequently, is made by a first rack 131 present on the first shaped body 125 and by the teeth of the cog-wheel 126 .
  • the working of this embodiment is similar to the preceding one.
  • the conditioning groups of the movement of the connecting rods may be more than two and each one may consist of one or more levers operatively interposed between the connecting rods and which cooperate with each other to allow only counter-rotating movements of the connecting rod small ends with respect to the support structure.
  • the needles 4 are subject to transversal stress caused by the moving product V .
  • the conditioning groups 20 and 21 allow to prevent this from causing mechanical damages, there is the risk to damage the product V .
  • a solution is known according to which the needles 4 perform a controlled movement also in the advancing direction of the product V to be processed. In other words the movement of the needles 4 forms an ellipse.
  • phase-shift groups may be more than one, or one for each connecting rod or they may be part of the gearbox 10 .
  • the device 1 comprises an elaboration and control unit which in turn includes control means of the phase-shift entity.
  • the needling device according to the invention ensures a correct movement to the needles bar also in presence of load applied thereto which submit it to stress along the advancing direction of the product to be sewn.
  • the needling device according to the invention ensure in time the movement stability of the needling bar so that the obtained product is of excellent quality.
  • the production speed is preserved and may be even higher than the speed of the known devices, because of the mechanical easiness and of the reduced masses with respect to the prior art equivalent devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Massaging Devices (AREA)
EP20110186748 2010-12-01 2011-10-26 Needling device Not-in-force EP2460920B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITVI2010A000325A IT1403176B1 (it) 2010-12-01 2010-12-01 Dispositivo di cucitura.

Publications (2)

Publication Number Publication Date
EP2460920A1 EP2460920A1 (en) 2012-06-06
EP2460920B1 true EP2460920B1 (en) 2013-04-24

Family

ID=43737534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110186748 Not-in-force EP2460920B1 (en) 2010-12-01 2011-10-26 Needling device

Country Status (2)

Country Link
EP (1) EP2460920B1 (it)
IT (1) IT1403176B1 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108149391B (zh) * 2017-12-25 2019-09-06 常熟开关制造有限公司(原常熟开关厂） 无纺设备定位装置及其控制方法、一种无纺设备

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7717626U1 (de) 1977-06-03 1977-09-29 Oskar Dilo Maschinenfabrik, Kg, 6930 Eberbach Nadelfilzmaschine mit einer fuehrungsvorrichtung fuer den nadelbalken
IT1255727B (it) 1992-05-19 1995-11-15 Sistema di controllo del movimento rettilineo verticale alternativo della trave porta-aghi di una macchina agugliatrice
US5732453A (en) 1995-09-15 1998-03-31 Oskar Dilo Maschinenfabrik Kg Needle bar driving apparatus of a needle loom
AT407651B (de) * 1999-06-18 2001-05-25 Fehrer Textilmasch Vorrichtung zum nadeln eines vlieses
AT411271B (de) * 2001-04-19 2003-11-25 Fehrer Textilmasch Vorrichtung zum nadeln eines vlieses
GB2408517B (en) * 2003-11-27 2007-07-11 Fehrer Textilmasch An apparatus for needling a non-woven material
DE102004043890B3 (de) * 2004-09-08 2006-04-20 Oskar Dilo Maschinenfabrik Kg Nadelmaschine
TW200806839A (en) 2006-05-20 2008-02-01 Saurer Gmbh & Amp Co Kg Apparatus for needling a non-woven web
FR2909104B1 (fr) 2006-11-29 2009-02-13 Asselin Thibeau Soc Par Action Dispositif et procede d'aiguilletage.
WO2009019111A1 (de) * 2007-08-04 2009-02-12 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum vernadeln einer faserbahn

Also Published As

Publication number Publication date
IT1403176B1 (it) 2013-10-04
EP2460920A1 (en) 2012-06-06
ITVI20100325A1 (it) 2012-06-02

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