EP1526208B1 - Device and method for grinding tubular fabrics - Google Patents

Device and method for grinding tubular fabrics Download PDF

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Publication number
EP1526208B1
EP1526208B1 EP20040105072 EP04105072A EP1526208B1 EP 1526208 B1 EP1526208 B1 EP 1526208B1 EP 20040105072 EP20040105072 EP 20040105072 EP 04105072 A EP04105072 A EP 04105072A EP 1526208 B1 EP1526208 B1 EP 1526208B1
Authority
EP
European Patent Office
Prior art keywords
tubular fabric
supporting
guiding structure
grinding
widening
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.)
Expired - Lifetime
Application number
EP20040105072
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1526208A1 (en
Inventor
Bruno Scortegagna
Antonio Panozzo
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.)
Lafer SpA
Original Assignee
Lafer SpA
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Filing date
Publication date
Application filed by Lafer SpA filed Critical Lafer SpA
Publication of EP1526208A1 publication Critical patent/EP1526208A1/en
Application granted granted Critical
Publication of EP1526208B1 publication Critical patent/EP1526208B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C11/00—Teasing, napping or otherwise roughening or raising pile of textile fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C5/00—Shaping or stretching of tubular fabrics upon cores or internal frames

Definitions

  • the present invention concerns a device, and the relative method, for grinding tubular fabrics, particularly hosiery fabrics or suchlike.
  • grinding we mean a treatment to finish fabrics suitable to give the feel of the fabric particular aesthetic effects, for example, ageing, pre-washing or the so-called peach-skin effect.
  • abrasive material such as abrasive paper, diamond paper, filaments or other.
  • rollers brushes can be used or other similar means, or even plates covered with abrasive material.
  • the action of the abrasive material on the fabric produces a partial removal of fibrous material, causing the formation of a surface down that is more or less accentuated according to the final result or characteristics of feel to be obtained. Grinding is normally performed on dry textile material or even, in some cases, on material that has been previously wet or dampened.
  • the various known grinding devices for tubular fabrics include various disadvantages, to a greater or lesser extent, including the need for complex accessory components for widening and/or stretching the fabric, great spaces occupied if several passes of the fabric on the abrasive elements are required, low productivity, poor uniformity in the treatment, especially if the fabric has extensive surfaces, and other problems.
  • GB-A-2.169.009 discloses a method for abrading the external surface of a tubular fabric by using a plurality of brushes that act on the fabric inserted on a cylindrical former.
  • EP-A-1.281.801 discloses a machine for performing brushing action on the surface of a tubular fabric, which employs roller brushes able to be engaged with side edges of the fabric inserted on the arms of an extending and widening device.
  • One purpose of the present invention is to achieve a grinding device for a tubular fabric that limits to a minimum the need for accessory devices, that reduces the operating times, increases productivity and reduces the overall bulk given the same number of grinding passes.
  • Another purpose is to guarantee a high uniformity of the grinding action even when the fabric to be treated has extensive surfaces.
  • Another purpose is to reduce to a minimum the contact between the fabric and the widening elements, thus preventing the risk of marks or signs being made on the fabric.
  • Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a device for grinding a tubular fabric comprises a support and transport element on which said tubular fabric is able to be positioned in order to be widened, supported and fed in a determinate direction, and grinding elements arranged around said support and transport element and able to be taken into contact with the outer surface of the tubular fabric, positioned on the support and transport element, in order to achieve a grinding action on said outer surface.
  • the support and transport element comprises at least an inlet element, the function of which is to open and progressively dilate the tubular fabric as it advances.
  • said inlet element comprises a widening device, for example of a magnetic, mechanical or other type, which consists of at least a pair of arms on which the tubular fabric is positioned.
  • the arms can be selectively brought closer to each other or distanced from each other in order to widen or narrow the tubular fabric to the desired extent, for example according to the size, and in order to guarantee at the same time that the desired tension is maintained.
  • the inlet element comprises a shaped element with a divergent conformation starting from the inlet of the tubular fabric.
  • the support and transport element Downstream of the inlet element, the support and transport element comprises a supporting and guiding structure on which the tubular fabric advances, and around which the grinding elements are arranged.
  • the supporting and guiding structure consists of a plurality of frames, disks or rings, arranged in succession and distanced from each other along the path on which the tubular fabric is fed; the tubular fabric is progressively positioned thereon so as to be accompanied from inlet to outlet of the grinding zone.
  • all the frames lie on respective planes substantially parallel to each other.
  • the frames have an asymmetrical geometric configuration with respect to at least an axis; for example they are rectangular in shape and are arranged with a different orientation on respective lying planes in order to modify the arrangement of the faces of the tubular fabric with respect to the grinding elements.
  • the frames are made in such a manner as to be able to vary their section size; for example they are made in two or more parts, the ends of which are telescopically associated.
  • the transit section as required by the size of the tubular fabric, and also to adjust the tension of the tubular fabric according to the type of processing to be done and the grinding result to be obtained.
  • each of said frames is made in at least two parts that can be separated in independent manner, so that each frame can be dis-assembled from the relative central shaft without requiring that it be removed axially. This considerably facilitates and accelerates the operations to re-adapt the support and transport element if the format of the tubular fabric to be treated has to be changed.
  • the widening device is kinematically connected to at least some of the frames so that, when adjustment is made at inlet to the device to bring closer/distance the widening device, all the frames connected to the widening device are in turn adjusted dimensionally in a coordinated manner.
  • this adjustment is made automatically, by driving a command member.
  • the command member is governed by a programmable control unit in which various adjustment parameters can be set according to the tubular fabric to be treated and the treatment to be done.
  • a preferential formulation of the invention provides that at least some of the grinding elements associated with different faces of the supporting are arranged on different levels along the support and transport element.
  • the grinding elements that lie on different levels are arranged angled one with respect to the other according to the angle formed between two adjacent faces of said supporting body or core.
  • the supporting body or core has a quadrangular section
  • grinding elements cooperating with adjacent faces of the supporting body or core are arranged superimposed one on top of another along the direction of feed of the tubular fabric and are orthogonal to each other in twos.
  • the grinding elements have their axis lying on a plane substantially orthogonal to the plane on which the axis of feed of the tubular fabric lies.
  • the supporting body or core has a substantially circular section and at least the inlet end, advantageously also the outlet end, has a progressively tapered section; thanks to this, the tubular fabric entering the device can be progressively widened and put under tension in correspondence with the cylindrical part where contact with the grinding elements occurs.
  • the supporting body or core has a constant section and cooperates, at least upstream, with a widening element with a divergent conformation.
  • Said grinding elements have an angularly fixed position with respect to the support and transport element.
  • the device comprises two or more groups of grinding elements, arranged at different heights along the longitudinal development of the support and transport element, each group comprising a plurality of grinding elements arranged angularly distanced around the support and transport element.
  • the grinding elements are angularly fixed whereby those present on a first annular support are advantageously arranged angularly offset with respect to those present on an adjacent annular support, so as to cover the whole surface of the tubular fabric passing through without leaving strips or bands that are not treated.
  • the support and transport element has an outer surface substantially continuous for the whole of its development, so as to function as a supporting and positioning plane for the tubular fabric for the whole of its extension.
  • the support and transport element has a discontinuous surface so that at least along part of its development the grinding elements act on a tubular fabric that is not totally supported and can thus exert a deeper and more effective action.
  • a grinding device 10 for grinding a tubular fabric 11 comprises a frame 12, in this case extending vertically, inside which a support and transport element 13 is arranged for the tubular fabric 11.
  • grinding groups 15, comprising in this case brushes 21, arranged one on top of the other along the longitudinal development of the support and transport element 13.
  • the brushes 21 have an abrasive or filamentary covering in order to perform the grinding action on the tubular fabric 11 passing along the support and transport element 13.
  • the brushes 21 are associated both with motor means, not shown here, so as to be made to rotate on their axis at least when they are in contact with the surface of the tubular fabric 11, and also with movement means, of a known type and not shown here, able to move them selectively from a position of contact to a position distanced from the tubular fabric 11 passing through, as shown by the arrows in figs. 2, 3 and 4 .
  • two groups of drawing rollers are provided, respectively an inlet roller 16 and an outlet roller 17, able to feed the tubular fabric 11 from inlet to outlet of the support and transport element 13.
  • the outlet roller 17 is associated with a relative motor 32.
  • the support and transport element 13 has a supporting and guiding structure 31, consisting of a plurality of little frames 28, with a quadrangular section, in this case square or rectangular, so as to define four substantially plane working surfaces 31a, 31b, 31c, 31d ( fig. 4 ); relative grinding brushes 21 cooperate which each of them.
  • the brushes 21 are arranged in superimposed pairs on several levels along the supporting and guiding structure 31, each pair having brushes 21 arranged with an axis substantially parallel to each other, the brushes 21 of superimposed pairs having a reciprocally orthogonal axis.
  • the brushes 21 of each pair can be arranged on the same level ( fig. 1 ) or slightly offset along the support and transport element 13.
  • Each brush 21 is arranged so as to cover, with an axis substantially orthogonal to the direction of feed of the tubular fabric 11, a relative surface 31a-31d of the supporting and guiding structure 31.
  • the supporting and guiding structure 31 has a triangular, pentagonal, hexagonal section or other, there can be one brush 21 for every level and the angle formed between the brushes 21 of adjacent levels will be greater or less than 90° according to the different cases.
  • the little frames 28 are mounted on a supporting shaft 30 by means of flanges 29.
  • each little frame 28 is made in two independent halves, respectively 128a and 128b ( figs. 2 and 3 ), so that each of them can be removed laterally and autonomously from the supporting shaft 30 without requiring them to be removed axially, which would entail long and complex operations to dismantle and disconnect the other operating groups of the grinding device 10.
  • the two halves 128a and 128b of each little frame 28 can be mounted on the supporting shaft 30 in an independently adjustable manner, at least in a lateral direction, according to the size of the tubular fabric 11 to be treated and the value of tension that is to be imparted thereto during processing.
  • the support and transport element 13 Upstream of the supporting and guiding structure 31 the support and transport element 13 has a widening element 19, the function of which is to open and progressively dilate the tubular fabric 11 entering, until it becomes gripped by the lower part of the supporting and guiding structure 31.
  • the widening element 19 consists ( figs. 1 and 4 ) of a pair of arms 33 on which the tubular fabric 11 is positioned, each of which cooperates with a relative block 34, arranged outside and in proximity with a relative arm 33.
  • Wheels respectively lower 37 and upper 38, mounted on the blocks 34, are commanded by a motor 40 and contribute to the feed of the tubular fabric 11, while support and guide wheels 39 are mounted on the arms 33.
  • the motor 40 and the motor 32 of the outlet roller 17 are independently commanded, so that it is possible to adjust to the desired value the tension of the tubular fabric 11 passing through, possibly modifying it also during the treatment according to needs.
  • the blocks 34 are mounted on respective screw-type shafts 41, connected to respective motors 42. Driving the motors 42 in one direction of rotation or the other determines a corresponding reciprocal distancing or drawing closer of the blocks 34 according to the entity of the widening to be imparted to the tubular fabric 11 at inlet to the grinding device 10.
  • the arms 33 are mounted on the supporting shaft 30 on which the little frames 28 are also mounted, and are connected to it, in this case, by means of a relative rack 43 which engages on a sprocket 44 solid with the supporting shaft 30.
  • each little frame 28 is also mounted on the supporting shaft 30 by means of a respective rack 43 which engages on a relative sprocket 44 solid with the supporting shaft 30.
  • the drive of the motors 42 is advantageously governed by a control unit in which working programs can be set according to the type and size of the tubular fabric 11 to be treated and the type of grinding treatment to be done.
  • This command system allows, in a relatively simple and economical manner, to adapt on each occasion the geometry of the supporting and guiding structure 31 to the specific operating situation, according to the type of tubular fabric 11 to be treated and the operating result to be obtained.
  • the tubular fabric 11 is positioned on the widening element 19 and on the little frames 28, and the operation to feed it is begun, by driving the motors at inlet 40 and at outlet 32.
  • the inlet step it may be provided to use a segment of discard or an added segment applied on the tubular fabric 11 to be ground.
  • Each brush 21 acts on a relative substantially plane face of the tubular fabric 11, which can be supported between two points, as in fig. 1 , with the brushes 21 penetrating in greater depth into the surface of the tubular fabric 11.
  • the tubular fabric thus ground is discharged by the outlet rollers 17. It comes within the field of the invention that a same face of the tubular fabric 11 can be subjected to several grinding passes in the grinding device 10, or that the tubular fabric 11 can be turned over and returned to the grinding device 10 so that the opposite face can be ground.
  • the tubular fabric 11 can be introduced into the frame 12 from above downwards, or it can make alternate working cycles first in one direction and then in the other.
  • the supporting and guiding structure 31 can also have an elliptical transverse section, or other type. In these cases the arrangement of the brushes 21 has to be planned accordingly, so as to ensure that grinding is performed on all the outer surface 11a of the tubular fabric 11.
  • the supporting and guiding structure 31 can also have a shaped outer surface, so as to improve the conditions of contact between the tubular fabric 11 and the grinding brushes 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
EP20040105072 2003-10-17 2004-10-15 Device and method for grinding tubular fabrics Expired - Lifetime EP1526208B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD20030208 ITUD20030208A1 (it) 2003-10-17 2003-10-17 Dispositivo e procedimento di smerigliatura per tessuti tubolari.
ITUD20030208 2003-10-17

Publications (2)

Publication Number Publication Date
EP1526208A1 EP1526208A1 (en) 2005-04-27
EP1526208B1 true EP1526208B1 (en) 2008-08-20

Family

ID=34385846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040105072 Expired - Lifetime EP1526208B1 (en) 2003-10-17 2004-10-15 Device and method for grinding tubular fabrics

Country Status (3)

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EP (1) EP1526208B1 (it)
DE (1) DE602004015909D1 (it)
IT (1) ITUD20030208A1 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015107380A1 (en) * 2014-01-17 2015-07-23 Norman International S.P.A. A napping machine for tubular seamless fabrics
ITUA20164668A1 (it) * 2016-06-27 2017-12-27 Sintec Textile S R L Apparato di smerigliatura per tessuti
CN115251566B (zh) * 2022-08-31 2024-06-04 湖北智丰数控机械有限公司 纺织业大棍刷全自动剪毛磨圆头毛机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB198050A (en) * 1922-02-23 1923-05-23 Arthur Meats Improvements in or relating to machines for brushing up fabric
GB820383A (en) * 1957-01-04 1959-09-16 Tomlinsons Rochdale Ltd Improvements in or relating to teazle raising machines
GB8432005D0 (en) * 1984-12-19 1985-01-30 Saffron Knitting Co Ltd Knitted fabric
ES2210116T3 (es) * 2001-07-27 2004-07-01 Sperotto Rimar S.R.L. Maquina para suavizar la superficie de un tejido de genero de punto circular continuo.

Also Published As

Publication number Publication date
DE602004015909D1 (de) 2008-10-02
ITUD20030208A1 (it) 2005-04-18
EP1526208A1 (en) 2005-04-27

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