EP1524353A2 - Vorrichtung zum Ausbreiten von schlauchförmigem Textilgut - Google Patents

Vorrichtung zum Ausbreiten von schlauchförmigem Textilgut Download PDF

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Publication number
EP1524353A2
EP1524353A2 EP04105027A EP04105027A EP1524353A2 EP 1524353 A2 EP1524353 A2 EP 1524353A2 EP 04105027 A EP04105027 A EP 04105027A EP 04105027 A EP04105027 A EP 04105027A EP 1524353 A2 EP1524353 A2 EP 1524353A2
Authority
EP
European Patent Office
Prior art keywords
tubular fabric
widening device
supporting frame
respect
mobile arms
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.)
Withdrawn
Application number
EP04105027A
Other languages
English (en)
French (fr)
Other versions
EP1524353A3 (de
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
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 Lafer SpA filed Critical Lafer SpA
Publication of EP1524353A2 publication Critical patent/EP1524353A2/de
Publication of EP1524353A3 publication Critical patent/EP1524353A3/de
Withdrawn legal-status Critical Current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
    • D06C5/00—Shaping or stretching of tubular fabrics upon cores or internal frames

Definitions

  • the present invention refers to a widening device for a tubular fabric.
  • the device according to the invention is preferably but not exclusively used at inlet to textile machines such as calenders, grinding machines, brushing machines, steaming machines or other, suitable to perform finishing treatments on fabrics or hosiery made of cotton, wool, silk or other.
  • textile machines such as calenders, grinding machines, brushing machines, steaming machines or other, suitable to perform finishing treatments on fabrics or hosiery made of cotton, wool, silk or other.
  • those which comprise two supporting frames arranged at a certain distance from each other and reciprocally able to slide on opposite sides with respect to a linear guide, each of which is associated with a relative mobile arm.
  • One end of the tubular fabric is inserted on the two mobile arms, while the two supporting frames are arranged outside the tubular fabric; by adjusting the distance between the two supporting frames the tubular fabric is widened to the desired value compatible with its characteristics of width, elasticity, compactness, etc.
  • EP-A-900,872 shows a solution wherein each mobile arm is associated with the relative supporting frame by means of magnets arranged in a single position, substantially central, on the length of the arms; the magnets determine an action of attraction between arm and frame which tends to keep them in a pre-determined reciprocal position.
  • magnets having a high force of attraction entails a considerable friction between the gripped segments of the tubular fabric and the relative movement members, such as wheels, belts or chains; very often, this high friction ruins and marks the fabric, lowering the quality of the product emerging from the finishing treatment.
  • EP-A-1,138,816 discloses a widening device wherein, apart from the magnetic means that exert the attraction between frames and relative arms, there are also contrasting wheels that function as stabilizing elements in order to prevent the arm from detaching from the frame in the event that the elastic tension of the fabric exceeds the force of attraction imparted by the magnets.
  • This solution allows to reduce the value of the force of attraction of the magnets, and consequently the friction on the fabric, but entails the disadvantage of introducing another element of friction, represented by the wheels themselves.
  • both the aforesaid known solutions do not provide the possibility of adjusting the intensity of the magnetic field generated according to the characteristics of the tubular fabric being worked.
  • One purpose of the present invention is to achieve a widening device which allows to exert an effective action of lateral traction on the fabric without any risk of the fabric coming off, or the widening elements becoming detached, and without inducing high friction on the fabric that can compromise the quality thereof and the characteristics of feel.
  • Another purpose is to achieve a widening device that is simple and economical to make and that allows to adjust the intensity of the magnetic field generated with maximum precision according to the characteristics of the tubular fabric being worked.
  • the 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 widening device for a tubular fabric comprises a supporting frame, at least a pair of mobile arms associated with the supporting frame and on which the tubular fabric is able to be inserted and made to advance, and movement members able to feed the tubular fabric along the mobile arms.
  • each of the mobile arms at least two distinct magnetic groups are arranged, advantageously three or more, able to exert respective forces of attraction in distinct and separate zones in order to keep the relative mobile arms in a desired position with respect to the supporting frame.
  • Each of the said magnetic groups has at least a pair of mating magnets, that is, arranged so that the two respective facing surfaces have opposite polarities generating a force of reciprocal attraction, so as to exert a force of attraction between relative mobile arm and supporting frame.
  • the members that move the fabric comprise at least a first drawing roller at inlet and a second drawing roller at outlet
  • the magnetic groups are respectively arranged upstream of the first drawing roller, between the first roller and the second roller, and downstream of the second drawing roller.
  • the magnetic groups are arranged reciprocally in substantially symmetrical positions on the length of the relative mobile arm.
  • each of the magnetic groups comprises adjustment means that allow to move the magnets closer to/away from each other in order to adjust, independently for each magnetic group, the intensity of the force of attraction exerted in each of the distinct and separate zones of the mobile arms.
  • the widening device can provide magnetic groups whose individual forces of attraction generated are of a relatively low value, and can be adjusted in differentiated manner according to the characteristics of the fabric and its specific position with respect to the length of the arms. This greatly reduces the friction and hence the risks of marking the fabric.
  • the widening device comprises contrasting and stabilizing means able to act on the opposite side of the mobile arms with respect to that on which the magnetic means act, in order to contrast the force that brings the mobile arms reciprocally closer as exerted thereon by the elastic tension of the advancing tubular fabric.
  • Said contrasting and stabilizing means consist, in a preferential embodiment, of at least two pairs of second magnetic means arranged one with respect to the other in an angled configuration with respect to the axis of feed of the tubular fabric. Said angle is advantageously about 45°.
  • the two respective facing surfaces of the second magnetic means have the same polarity, so as to generate a force of reciprocal repulsion.
  • the contrasting and stabilizing means consist of pairs of mechanical means such as wheels, pads or suchlike arranged angled with respect to the axis of feed of the fabric.
  • the movement members that move the fabric comprise drawing belts arranged over the whole length of the mobile arms, so as to constantly accompany the tubular fabric along the whole length of the widening device from inlet to outlet.
  • both the first and the second magnetic means consist of permanent magnetic materials taken from minerals called rare earths, such as neodymium, samarium, cobalt or suchlike.
  • a widening device 10 for a tubular fabric 11 is arranged upstream of a textile machine, such as for example a calender, a brushing machine, a grinding machine, a steamer or other.
  • a textile machine such as for example a calender, a brushing machine, a grinding machine, a steamer or other.
  • the widening device 10 comprises a supporting frame 12, divided substantially into two parts 15 and 16 symmetrical with respect to a median axis M, and a pair of mobile arms 13 on which the tubular fabric 11 to be widened is able to be inserted.
  • the two parts 15 and 16 of the supporting frame 12 are able to slide reciprocally on opposite sides with respect to a fixed bench 17.
  • Each of said first 15 and second 16 parts of the supporting frame 12 supports a first drawing roller 19 arranged at inlet to the widening device 10 and a second drawing roller 20 arranged at outlet, which are able to feed the tubular fabric 11 along the widening device 10.
  • drawing belts respectively lower 21, central 22 and upper 23, mounted on the respective mobile arms 13, and able to accompany and support the tubular fabric 11 along the whole length of the widening device 10, so as to prevent the possible formation of creases or blockages of the tubular fabric 11 itself.
  • the two parts 15 and 16 of the supporting frame 12 are connected to the respective mobile arms 13 by means of three magnetic groups 25, 26 and 27, each consisting of two magnets 29 and 30, arranged with opposite poles facing each other, so as to exert a reciprocal force of attraction that draws the two magnets 29, 30 closer to each other.
  • the magnetic groups 25, 26 and 27 are respectively arranged upstream of the first drawing roller 19, in an intermediate position between the first 19 and the second 20 drawing roller, and downstream of the second drawing roller 20, and are able to exert their force of reciprocal attraction in distinct and separate zones of the respective mobile arms 13.
  • the magnetic groups 25, 26 and 27 are distributed in several zones, and advantageously in a symmetric manner, over the whole length of the mobile arms 13, the intensity of the respective individual forces of magnetic attraction can be considerably reduced; this allows to keep the friction between the drawing rollers 19 and 20 and the tubular fabric 11 passing through to very low values, and consequently the risk of ruining the tubular fabric 11 is reduced.
  • Each of said magnetic groups 25, 26 or 27 comprises a first magnet 29, mounted on the mobile arm 13, and a second magnet 30 mounted on the supporting frame 12, which, by performing an action of attraction, tend to keep the mobile arm 13 attracted to the supporting frame 12.
  • the at least lateral position of the second magnet 30 can be adjusted inside a certain travel (shown by a line of dashes), in an independent manner for each assembly 25, 26, 27, by means of an adjustment screw 31, in order to move it closer to/away from the relative first magnet 29; this allows to vary, also in a differentiated manner over the length of the arms 13, the intensity of the force of attraction exerted by each magnetic group 25, 26, 27.
  • Each part 15 or 16 of the supporting frame 12 comprises a fork element 32 (fig. 2) inside which the relative mobile arm 13 is arranged, and at the end of which two pairs of magnets 33 and 35 are inserted, advantageously arranged at 45° with respect to each other.
  • the pairs of magnets 33, 35 are arranged so as to have the same polarities on the respective facing surfaces, so as to exert a force of repulsion between the supporting frame 12 and a relative segment of the mobile arm 13 along its opposite edge with respect to the position of the magnetic groups 25, 26 and 27.
  • This force of repulsion ensures that the mobile arm 13 remains in a position such as to guarantee that the action of attraction exerted by the magnetic groups 25, 26, 27 is maintained, to prevent the fabric coming off, or the widening elements becoming detached.
  • magnets 33 and 35 or the rollers 36 and 37 instead of the magnets 33 and 35 or the rollers 36 and 37, other types of contrasting means can be provided, such as for example known devices of an electronic, pneumatic type or other.
  • drawing rollers 19 and 20 can be replaced by strips, belts or other movement members suitable to move the tubular fabric 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
EP04105027A 2003-10-14 2004-10-13 Vorrichtung zum Ausbreiten von schlauchförmigem Textilgut Withdrawn EP1524353A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD20030205 ITUD20030205A1 (it) 2003-10-14 2003-10-14 Dispositivo allargatore per un tessuto tubolare.
ITUD20030205 2003-10-14

Publications (2)

Publication Number Publication Date
EP1524353A2 true EP1524353A2 (de) 2005-04-20
EP1524353A3 EP1524353A3 (de) 2005-10-12

Family

ID=34362458

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04105027A Withdrawn EP1524353A3 (de) 2003-10-14 2004-10-13 Vorrichtung zum Ausbreiten von schlauchförmigem Textilgut

Country Status (2)

Country Link
EP (1) EP1524353A3 (de)
IT (1) ITUD20030205A1 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0267880A1 (de) * 1986-11-10 1988-05-18 F.LLI FERRARO S.r.l. Breithalter für Schlauchware

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2592897B1 (fr) * 1986-01-15 1989-02-24 Auffredou Jean Michel Elargisseur universel pour l'etalement du tricot tubulaire.
IT1294995B1 (it) * 1997-09-08 1999-04-27 Sperotto Rimar Spa Dispositivo allargatore perfezionato per tessuti a maglia tubolare
IT1317153B1 (it) * 2000-03-28 2003-05-27 Ferraro Spa Allargatore di tessuti tubolari con sostentamento magnetico verticaledei bracci allargatori

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0267880A1 (de) * 1986-11-10 1988-05-18 F.LLI FERRARO S.r.l. Breithalter für Schlauchware

Also Published As

Publication number Publication date
EP1524353A3 (de) 2005-10-12
ITUD20030205A1 (it) 2005-04-15

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