EP0534060B1 - Verfahren zur Herstellung von Fadenführungsringen - Google Patents

Verfahren zur Herstellung von Fadenführungsringen Download PDF

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Publication number
EP0534060B1
EP0534060B1 EP92109526A EP92109526A EP0534060B1 EP 0534060 B1 EP0534060 B1 EP 0534060B1 EP 92109526 A EP92109526 A EP 92109526A EP 92109526 A EP92109526 A EP 92109526A EP 0534060 B1 EP0534060 B1 EP 0534060B1
Authority
EP
European Patent Office
Prior art keywords
radius
curvature
ring
arms
yarn guiding
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
EP92109526A
Other languages
English (en)
French (fr)
Other versions
EP0534060A1 (de
Inventor
Ferruccio Bonanomi
Bruno Longhi
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.)
BETTINI SpA
Original Assignee
BETTINI 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 BETTINI SpA filed Critical BETTINI SpA
Publication of EP0534060A1 publication Critical patent/EP0534060A1/de
Application granted granted Critical
Publication of EP0534060B1 publication Critical patent/EP0534060B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/06—Annular guiding surfaces; Eyes, e.g. pigtails
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a method for manufacturing yarn guiding rings, particularly used in spinning machines.
  • the spinning machines have yarn guiding rings whose function is well-known and will not he described herein for brevity.
  • the guiding rings are generally constituted by a ring of metallic wire welded to a supporting plate which is configured according to the requirements.
  • the ring is open in order to allow the insertion of the yarn, and its ends overlap so that the yarn encounters a perfectly circular and uninterrupted internal circumference. Furthermore, the internal finish of the rings must be extremely accurate in order to prevent the deterioration and breakage of the yarn going through the ring at a very high speed.
  • a known method for manufacturing yarn guiding rings comprises: forming a ring by bending a metallic wire, blanking a supporting plate, welding the plate to the ring, and finally performing the required surface treatments, such as trimming, polishing, chromium plating, etc.
  • the method is expensive, because of the welding operation, and because it requires a long production time and specialized personnel.
  • Another severe disadvantage is that the welding operation is unhealthy.
  • the ring may break at the welding point due to the vibrations to which it is subjected during use.
  • a yarn guiding ring executed monolithically by blanking and bending a metal plate has recently been introduced.
  • the advantage of this type of execution is its relatively lower production cost, with respect to the welded ring.
  • the execution of this type of ring entails an apparatus which is very complicated and still expensive, due to the number and type of dies required, as well as scarcely flexible as regards the possibility of producing rings of various sizes and types, unless expensive modifications of the dies are carried out.
  • the aim of the present invention is to provide a process for manufacturing yarn guiding rings which is effectively simpler and more economical than known methods.
  • an object of the invention is to provide a manufacturing process which avoids the welding operation.
  • Still another object is to provide a process according to which the finishing operations are simplified and can be performed with ordinary machines.
  • the method according to the invention initially comprises the step of forming a plate body 1, in one piece, by blanking a metal plate 3 of adequate thickness.
  • the formed body 1 is constituted by a fork element having a supporting element 7.
  • the supporting element 7 is substantially a flat strip which may have different shapes and dimensions according to the design requirements of the machine to which the yarn guiding ring will be applied.
  • the fork element comprises two arms 5: each arm 5 is constituted by a first portion, having a radius of curvature R, and by a second portion, having a radius of curvature S greater than the radius R.
  • the radius of curvature R is substantially the final internal radius of curvature of the finished yarn guiding ring.
  • the free ends of the arms 5 are advantageously offset, with respect to the plane of the formed body, at the open region 9 of the fork element.
  • the second step of the ring manufacturing process comprises the preparation and/or finishing of the surfaces, such as the blending of the edges and the elimination of burr.
  • the third step of the process comprises the operation of bending the arms 5, which substantially affects the second portions with radius S, so as to form a perfect circle with a radius R and thus the finished yarn guiding ring 10.
  • the ring 10 may optionally be subjected to a surface treatment such as for example chromium plating.
  • Figures 5-8 illustrate a yarn guiding ring 110 which is provided with a Z-shaped supporting plate. Elements similar to those of Figures 1-4 are indicated, in Figures 5-8, by the same numerals increased by 100.
  • a formed body 101 in one piece, is obtained from a metallic plate 103 and is then subjected to the particular bending operation of the arms 105, as described above.
  • the invention achieves the intended aim and objects by providing a monolithic yarn guiding ring, therefore without welds, and with blanking and bending operations which do not require particularly complicated or expensive dies.
  • the peculiarity of the invention resides in the configuration of the arms of the formed body 1, 101, which has allowed to obtain a ring with a perfect internal profile, of radius R, by means of a relatively simple operation such as bending.
  • the ring 10, 110 thus obtained has better mechanical characteristics than rings manufactured according to known processes.
  • the possibility of breakage at the point of connection (welding) between the ring itself and the supporting plate is in fact eliminated.
  • the weight of the ring manufactured according to the invention is lower than in rings manufactured with prior art methods.
  • Another advantage of the invention is the significant reduction in labour, since almost all the operations can be performed automatically.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Forging (AREA)

Claims (4)

  1. Verfahren zur Herstellung von Fadenführerringen (10, 110), dadurch gekennzeichnet, daß es folgende Schritte enthält:
    a) Formen eines Plattenkörpers (1,101), der ein Gabelelement enthält, das ein Trägerelement (7) und zwei Arme (5,105) aufweist, wobei jeder der Arme einen ersten Abschnitt mit einem ersten Krümmungsradius (R) und einen zweiten Abschnitt mit einem zweiten Krümmungsradius (S) aufweist, wobei der erste Krümmungsradius im wesentlichen gleich dem Krümmungsradius des fertigen Rings und der zweite Krümmungsradius im wesentli chen größer als der erste Krümmungsradius ist und wobei jeder der Arme ein freies Ende hat und diese freien Enden voneinander beabstandet (9,19,109,119) sind;
    b) Biegen der Arme derart, daß sich die freien Enden zumindest teilweise überlappen und der zweite Krümmungsradius im wesentlichen auf die Abmessungen des ersten Krümmungsradius reduziert wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Schritt des Formens des Plattenkörpers (1,101) das Stanzen einer Metallplatte (3,103) enthält.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zwischen den Schritten des Formens und des Biegens der Platte ein Oberflächenbcarbeitungsschritt für den Ring liegt.
  4. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß es einen Schritt der Verchromung des Rings (10,110) enthält.
EP92109526A 1991-09-24 1992-06-05 Verfahren zur Herstellung von Fadenführungsringen Expired - Lifetime EP0534060B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI912531 1991-09-24
ITMI912531A IT1259604B (it) 1991-09-24 1991-09-24 Procedimento per la fabbricazione di anelli antiballon

Publications (2)

Publication Number Publication Date
EP0534060A1 EP0534060A1 (de) 1993-03-31
EP0534060B1 true EP0534060B1 (de) 1995-09-20

Family

ID=11360746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109526A Expired - Lifetime EP0534060B1 (de) 1991-09-24 1992-06-05 Verfahren zur Herstellung von Fadenführungsringen

Country Status (3)

Country Link
EP (1) EP0534060B1 (de)
DE (1) DE69204950T2 (de)
IT (1) IT1259604B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107938121B (zh) * 2017-12-21 2023-08-29 吴江君和纺织电器有限公司 夹丝器、张力器及纺织设备
CN107938140A (zh) * 2017-12-21 2018-04-20 吴江君和纺织电器有限公司 夹丝器及生产线
CH720005A1 (de) * 2022-09-02 2024-03-15 Rieter Ag Maschf Führungsvorrichtung für eine Ringspinnmaschine, Ringspinnmaschine sowie Verwendung einer Führungsvorrichtung.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1707599U (de) * 1954-01-22 1955-09-22 Bernhard Pross Fuehrungseinrichtung fuer ringlaeufer mit gleicher ballonspannung fuer spinn- und zwirnmaschinen.
DE3520864A1 (de) * 1985-06-11 1986-12-11 Hacoba Textilmaschinen Gmbh & Co Kg, 5600 Wuppertal Drahtfoermiger fadenfuehrer, insbesondere fuer fadenballonabzug
DE3532422A1 (de) * 1985-09-11 1987-03-19 Skf Textilmasch Komponenten Luntenfuehrer

Also Published As

Publication number Publication date
DE69204950D1 (de) 1995-10-26
DE69204950T2 (de) 1996-05-15
ITMI912531A0 (it) 1991-09-24
EP0534060A1 (de) 1993-03-31
ITMI912531A1 (it) 1993-03-24
IT1259604B (it) 1996-03-25

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