EP0041484B1 - Feeding of rovings to spinning machines - Google Patents

Feeding of rovings to spinning machines Download PDF

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Publication number
EP0041484B1
EP0041484B1 EP81830074A EP81830074A EP0041484B1 EP 0041484 B1 EP0041484 B1 EP 0041484B1 EP 81830074 A EP81830074 A EP 81830074A EP 81830074 A EP81830074 A EP 81830074A EP 0041484 B1 EP0041484 B1 EP 0041484B1
Authority
EP
European Patent Office
Prior art keywords
roving
creels
bobbin
spinning machines
bobbins
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
Application number
EP81830074A
Other languages
German (de)
French (fr)
Other versions
EP0041484A1 (en
Inventor
Giovanni Barro
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.)
Officine Savio SpA
Original Assignee
Officine Savio 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 Officine Savio SpA filed Critical Officine Savio SpA
Priority to AT81830074T priority Critical patent/ATE16511T1/en
Publication of EP0041484A1 publication Critical patent/EP0041484A1/en
Application granted granted Critical
Publication of EP0041484B1 publication Critical patent/EP0041484B1/en
Expired 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
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist

Definitions

  • This invention concerns bobbin creels for spinning machines; to be more specific, this invention concerns means known in themselves which are used in other machines with other functions, being installed on bobbin creels for spinning machines.
  • One purpose of this invention is to be able to use very heavy supply bobbins having even small threads forming on them, with the assurance that the bobbin will be pulled in rotation without false drafts of the roving.
  • a further purpose of this invention is to enable the roving to be pre-positioned as required in automatic creels, namely creels in which the bobbin is automatically replaced when it is finished.
  • this spiral is installed in spinning machines immediately upstream from the drawing rollers and serves to give the roving a greater consistency; that is to say, it serves to cause the roving to assume a false twist which induces a greater consistency in the roving itself.
  • the invention envisages a spiral twisting means positioned upstream from the first drawing rollers of the drafting system, the spiral twisting means acting as a guide for the roving being fed so as to provide consistency in the roving before the latter enters the drafting system.
  • the spiral twisting means being connected to the automatic creel, serves to position the roving and predispose it automatically for delivery to the drafting system since the engagement of the roving is made possible automatically owing to the false twist imparted to it.
  • the roving as it leaves the bobbins whether it be of the type with one or two threads, and as it is used in spinning machines, has a very low consistency; and it is known that during the phase of the unwinding of the bobbin itself it is possible for the roving to be sheared or to lose fibres, thus interrupting the regular work flow.
  • the spiral serves precisely to prevent this drawback.
  • the invention can be applied to normal spinning machines with an automatic creel and with pre-positioning of the roving.
  • the invention is therefore obtained with bobbin creels for spinning machines, whether such bobbin creels be stationary or automatic, the bobbin creels being adapted to work with bobbins having large dimensions and weighing four kilos or more, the bobbins rotating owing to the pulling action of the roving being unwound, the bobbin creels characterized by the fact that a twisting means consisting of an elongated element and conformed with a spiral is fitted immediately upstream from each drafting unit and engages the roving, imparting to the same a false twist, which in turn imparts to the roving a great consistency that enables such pulling action to be transmitted to the bobbin.
  • the invention is also embodied with spinning machines with bobbin creels according to the above disclosure.
  • bobbins 10 may be of a type with one or two rovings and may be positioned on a stationary creel or on an automatic creel with or without a movable trolley 19 to carry bobbins.
  • a roving, or rovings, 11 unwinding from the bobbins 10 owing to the action carried out by the drafting system 14-15 passes or can pass through a device 18 that checks the roving before the latter reaches a drawing roller 14 of the drafting system 14-15.
  • the roving 11 Before reaching the drawing roller 14 of the drafting system, the roving 11 enters a spiral twisting means 13, which provides the roving 11 with a false twist that gives such roving 11 a greater consistency precisely in the zone where it is most likely to break.
  • the thread 17 is wound onto bobbins 16.
  • the spiral twisting means 13 can also be installed on a trolley carrying bobbins or on an automatic creel 19; in such a case the twisting means 13, besides providing the roving 11 with greater consistency during processing, can also serve as a pre-positioning element so as to facilitate the engagement and delivery of the roving 11 to the organs 14 which pull or engage the roving itself 11 so as to send it on to the drafting system 14-15.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Transmission Devices (AREA)

Abstract

The invention concerns improvements applied to creels for spinning machines, whether said creels be stationary or automatic, and also to spinning machines using said improved creels, whereby said improvements envisage the installation of a spiral twisting means (13, known in itself, immediately upstream from the drafting system (14-15) in such a way that said means (13) imparts to the roving (II) a false twist which in turn induces a greater consistency in said roving.

Description

  • This invention concerns bobbin creels for spinning machines; to be more specific, this invention concerns means known in themselves which are used in other machines with other functions, being installed on bobbin creels for spinning machines.
  • improved spinning machines which employ the invention are also the subject of this invention.
  • One purpose of this invention is to be able to use very heavy supply bobbins having even small threads forming on them, with the assurance that the bobbin will be pulled in rotation without false drafts of the roving.
  • Next, it is a purpose of this invention to enable very large supply bobbins having a weight of even four kilos or more to be used in spinning machines.
  • The improvements applied to the creels serve, therefore, to cause the roving, which in itself is slender, not to break during the normal work of unwinding the bobbin, this work being carried out by the drawing action which the roving exerts on the bobbin.
  • A further purpose of this invention is to enable the roving to be pre-positioned as required in automatic creels, namely creels in which the bobbin is automatically replaced when it is finished.
  • The practice is known of installing in the finishers a spiral which acts as a tension leveller for the roving as it passes during the processing.
  • DE-A-1.785.481 is known and discloses the application of spiral tensioner means to the roving. Such tensioner means serve to prevent false drafts in the longest paths of the roving, since the feed of roving is provided from cans located at different distances. In this cited DE patent, therefore, the tensioner means have the purpose of not allowing the value of the draft to vary as between the various rovings, that is to say, it tends not to allow deterioration of rovings constrained to run along the longest path.
  • According to this invention this spiral is installed in spinning machines immediately upstream from the drawing rollers and serves to give the roving a greater consistency; that is to say, it serves to cause the roving to assume a false twist which induces a greater consistency in the roving itself.
  • This greater consistency causes the roving not to break readily, and the roving therefore becomes able to exert a harder drawing action on the bobbins, thus enabling bigger and heavier bobbins to be employed.
  • Furthermore, the greater consistency determined by the spiral in an automatic creel enables the drafting system to take and work the new roving independently as the latter arrives.
  • The invention, therefore, envisages a spiral twisting means positioned upstream from the first drawing rollers of the drafting system, the spiral twisting means acting as a guide for the roving being fed so as to provide consistency in the roving before the latter enters the drafting system.
  • Moreover, the spiral twisting means, being connected to the automatic creel, serves to position the roving and predispose it automatically for delivery to the drafting system since the engagement of the roving is made possible automatically owing to the false twist imparted to it.
  • It is known that the roving as it leaves the bobbins, whether it be of the type with one or two threads, and as it is used in spinning machines, has a very low consistency; and it is known that during the phase of the unwinding of the bobbin itself it is possible for the roving to be sheared or to lose fibres, thus interrupting the regular work flow.
  • Being advantageously positioned immediately upstream from the drafting system, the spiral serves precisely to prevent this drawback.
  • Thus the invention can be applied to normal spinning machines with an automatic creel and with pre-positioning of the roving.
  • The invention is therefore obtained with bobbin creels for spinning machines, whether such bobbin creels be stationary or automatic, the bobbin creels being adapted to work with bobbins having large dimensions and weighing four kilos or more, the bobbins rotating owing to the pulling action of the roving being unwound, the bobbin creels characterized by the fact that a twisting means consisting of an elongated element and conformed with a spiral is fitted immediately upstream from each drafting unit and engages the roving, imparting to the same a false twist, which in turn imparts to the roving a great consistency that enables such pulling action to be transmitted to the bobbin.
  • The invention is also embodied with spinning machines with bobbin creels according to the above disclosure.
  • With the help of the attached figures let us now see some non-restrictive preferential solutions, which are given as examples.
    • Fig. 1 gives a general diagram of a possible spinning machine with a stationary creel
    • Fig. 2 gives a general diagram of a possible spinning machine with an automatic creel.
  • The invention envisages that bobbins 10 may be of a type with one or two rovings and may be positioned on a stationary creel or on an automatic creel with or without a movable trolley 19 to carry bobbins.
  • A roving, or rovings, 11 unwinding from the bobbins 10 owing to the action carried out by the drafting system 14-15 passes or can pass through a device 18 that checks the roving before the latter reaches a drawing roller 14 of the drafting system 14-15.
  • Before reaching the drawing roller 14 of the drafting system, the roving 11 enters a spiral twisting means 13, which provides the roving 11 with a false twist that gives such roving 11 a greater consistency precisely in the zone where it is most likely to break.
  • At the delivery end of the drafting system 14-15 the thread 17 is wound onto bobbins 16.
  • The spiral twisting means 13 can also be installed on a trolley carrying bobbins or on an automatic creel 19; in such a case the twisting means 13, besides providing the roving 11 with greater consistency during processing, can also serve as a pre-positioning element so as to facilitate the engagement and delivery of the roving 11 to the organs 14 which pull or engage the roving itself 11 so as to send it on to the drafting system 14-15.
  • We have described a preferred solution here, but variants are possible for a technician in this field. Thus the proportions and sizes can be varied, and parts can be added or removed; it is possible to instal the spiral twisting means 13 before the device which checks the roving even if from experiments carried out by the author it has been shown that the best solution is obtained when the spiral twisting means 13 is located near the drawing roller 14, etc. These and other variants are possible within the scope of the invention.

Claims (2)

1. Bobbin creels for spinning machines, whether such bobbin creels be stationary or automatic, the bobbin creels being adapted to work with bobbins (10) having large dimensions and weighing four kilos or more, the bobbins (10) rotating owing to the pulling action of the roving (11) being unwound, the bobbin creels being characterized by the fact that a twisting means (13) consisting of an elongated element and conformed with a spiral is fitted immediately upstream from each drafting unit (14-15) and engages the roving (11), imparting to the same (11) a false twist, which in turn imparts to the roving (11) a greater consistency that enables such pulling action to be transmitted to the bobbin.
2. Spinning machines with bobbin creels according to Claim 1.
EP81830074A 1980-05-26 1981-05-15 Feeding of rovings to spinning machines Expired EP0041484B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81830074T ATE16511T1 (en) 1980-05-26 1981-05-15 FEEDING OF SPINNING MACHINES WITH LUNTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8338280 1980-05-26
IT83382/80A IT1141795B (en) 1980-05-26 1980-05-26 IMPROVEMENTS TO THE RACKS FOR THREADS AND THREADS ADOPTING SUCH RACKS

Publications (2)

Publication Number Publication Date
EP0041484A1 EP0041484A1 (en) 1981-12-09
EP0041484B1 true EP0041484B1 (en) 1985-11-13

Family

ID=11321044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81830074A Expired EP0041484B1 (en) 1980-05-26 1981-05-15 Feeding of rovings to spinning machines

Country Status (4)

Country Link
EP (1) EP0041484B1 (en)
AT (1) ATE16511T1 (en)
DE (1) DE3172878D1 (en)
IT (1) IT1141795B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038231A1 (en) * 1990-11-30 1992-06-04 Fritz Stahlecker METHOD AND SPINNING MACHINE FOR SPINNING FIBER TAPES
DE29712880U1 (en) * 1997-07-21 1997-09-25 Zinser Textilmaschinen Gmbh, 73061 Ebersbach Ring spinning machine with roving reel creel

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4122463A1 (en) * 1991-07-06 1993-01-07 Stahlecker Fritz SPIDER
WO2009086646A1 (en) * 2008-01-11 2009-07-16 Maschinenfabrik Rieter Ag Method for producing a roving

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191409966A (en) * 1913-05-26 1915-07-15 Josephy S Erben G Improved Method of and Apparatus for Drawing Carded Roving.
US3589119A (en) * 1967-10-07 1971-06-29 Przedzalnia Bawelny Im Gen Wal Device for feeding spinning machines with a sliver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038231A1 (en) * 1990-11-30 1992-06-04 Fritz Stahlecker METHOD AND SPINNING MACHINE FOR SPINNING FIBER TAPES
DE29712880U1 (en) * 1997-07-21 1997-09-25 Zinser Textilmaschinen Gmbh, 73061 Ebersbach Ring spinning machine with roving reel creel

Also Published As

Publication number Publication date
EP0041484A1 (en) 1981-12-09
DE3172878D1 (en) 1985-12-19
IT1141795B (en) 1986-10-08
IT8083382A0 (en) 1980-05-26
ATE16511T1 (en) 1985-11-15

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