EP0343718A1 - Procédé pour renvider des spires de fil sur des tubes vides lors du changement de la production dans un continu à filer à anneaux - Google Patents

Procédé pour renvider des spires de fil sur des tubes vides lors du changement de la production dans un continu à filer à anneaux Download PDF

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Publication number
EP0343718A1
EP0343718A1 EP89201240A EP89201240A EP0343718A1 EP 0343718 A1 EP0343718 A1 EP 0343718A1 EP 89201240 A EP89201240 A EP 89201240A EP 89201240 A EP89201240 A EP 89201240A EP 0343718 A1 EP0343718 A1 EP 0343718A1
Authority
EP
European Patent Office
Prior art keywords
cop
yarn
auxiliary pivot
spindle
pivot
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Withdrawn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
EP89201240A
Other languages
German (de)
English (en)
Inventor
Sandro Sartoni
Giovanni Verlicchi
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.)
Savio SpA
Savio Macchine Tessili SpA
Original Assignee
Savio SpA
Savio Macchine Tessili 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 Savio SpA, Savio Macchine Tessili SpA filed Critical Savio SpA
Publication of EP0343718A1 publication Critical patent/EP0343718A1/fr
Withdrawn legal-status Critical Current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
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/38—Arrangements for winding reserve lengths of yarn on take-up packages or spindles, e.g. transfer tails

Definitions

  • This invention relates to an improvement in the method and device described in European patent application No.88202767.5 in the name of the present applicant.
  • the invention relates to a method and carriage-mounted device for winding yarn turns onto empty cops which have been mounted on the spindles during feed change consequent for example on a required change in the quality of the yarn to be produced on the ring spinning machine.
  • Said device could however be improved in terms of allowing increased automation of a certain operational stage which occurs whenever the production programme is changed in order to accommodate a required change in the characteristics of the yarn to be produced.
  • the number of personnel required to change the type of yarn produced is related to the overall total of tasks which have to be carried out on the machine. These include the replacement of feed packages, the cleaning of the rollers and the various machine components, and the winding of a few turns of yarn onto the empty cops which have been automatically mounted on the spinning spindles by the doffing device to allow the new product yarn to be spun.
  • the object of the present invention is to effectively automate the operation of winding said yarn turns onto the empty cops on feed change-over in order to reduce the spinning machine down-time to a minimum and obtain better personnel efficiency by providing them with a work load which is more balanced and less onerous due to the smaller number of tasks to be carried out during yarn production change-over.
  • the device claimed therein remains unaltered but is subjected to improvements and operational simplifications designed to provide greater versatility in the application of the carriage-mounted device with a view to a more thorough and complete automation of the ring spinning machine, with a resultant reduction in operating costs because of the lesser use of personnel.
  • a method for automatically winding a few yarn turns onto the empty cops mounted on the spindles on feed change-over due to a change in the quality of yarn produced on a ring spinning machine consisting of: - mounting each cop individually on an auxiliary pivot after extracting said cop from the spindle on which it had been previously mounted by the automatic doffing device; - from a supplementary bobbin, unwinding yarn and transferring it to the region in proximity to the larger-diameter end of said cop, about which a few turns of it are wound; - then conveying the cop, about which the few yarn turns have been wound, from the auxiliary pivot to a spindle and finally mounting it on this latter.
  • the carriage-mounted device used in the practical implementation of the inventive method comprises, in mutual cooperation, a motor-rotated auxiliary pivot, a supplementary bobbin and a radial cam for guiding a cop gripper.
  • Said auxiliary pivot is surrounded by several operating elements the purpose of which is to position the end of the yarn at the top of the auxiliary pivot after it has arrived from the supplementary bobbin and hold it there by gripping it as the cop descends into a position mounted on said pivot, it also passing between scissor elements which cut the yarn when a few turns of it have been wound on the cop.
  • the said supplementary bobbin is flanked by a yarn guide driven with vertical reciprocating motion by any drive source, said radial cam having a lateral contour suitable for guiding the cop gripper from the spindle position to the auxiliary pivot position and from this latter to the spindle of the individual ring spinning unit.
  • the movement of the gripper can be obtained by any actuator of the known art.
  • the carriage-mounted device used for the practical implementation of the present invention is associated with programmer means to advantageously coordinate the sequence in which the various operating elements enter into operation.
  • the feed yarn remains positioned and tensioned along a precise path defined by the guide and deviation eyelets 30 and 29 and the tensioning washers 32 and passing through the upper end of the yarn guide 9, which deviates it between the teeth 1 at the top of the auxiliary pivot 6 by its movements, to terminate at the point in which the block comprising the yarn seizure element 5 and the yarn cutting element 4 is at rest.
  • said block is positioned waiting for a cop to be mounted on the pivot 6 (see Figure 2).
  • the actuator 27 is then actuated so that its rod 28 causes the gripper 15 to descend to mount the cop 2 on the auxiliary pivot 6 so that the yarn becomes clamped between the cop and pivot and is forced into position 12a (see Figure 2).
  • the gripper 15 releases its grip on the upper end of the cop and is raised by activation of the actuator 27 (see Figure 3).
  • the drive source 35 is rotated to rotate the auxiliary pivot 6 and thus the cop 2, with simultaneous activation of the actuator 31 which drives the yarn guide 9 with reciprocating motion in a vertical to-and-fro direction.
  • Said rotation and the vertical up-and-down movements compel the yarn 12 to unwind from the supplementary bobbin 3 and accumulate in the form of a few yarn turns 34 in proximity to the major base of the cop 2.
  • After a few up-and-down movements of the yarn guide 9 a sufficient number of yarn turns 34 will have been wound to enable the drive source 35 and the movement actuator 31 to be deactivated.
  • the movement actuator 27 is activated to cause the gripper 15 to descend and grip the cop 2 at its upper end.
  • the actuators and lever systems of the block 33 are activated to initially open the jaws or similar elements of the yarn seizure element 5 and release the end of the wound yarn and to then move the yarn seizure element and yarn cutting element to the other side of the auxiliary pivot 6 so that they become positioned between the cop on which the yarn turns 34 have been wound and the yarn guide 9.
  • the element 5 and element 4 embrace the yarn portion taut between the winding 34 and the yarn guide 9 (see Figure 4).
  • the jaws of the yarn seizure element 5 close to grip and clamp the yarn between them.
  • the yarn is cut at a point just after the jaws in the direction of the cop 2 by the action of the cutting blades of the yarn cutting element.
  • the other end of the wound turns 34 is released and is therefore no longer connected to the feed yarn 12 from the supplementary bobbin 13, the end of the feed yarn 12 being clamped by the jaws of the yarn seizure element 5.
  • the actuator 27 is activated to raise the gripper 15 with the cop 2.
  • Activation of the movement activator 14 immediately follows so that its rod 11 shifts the bell-crank lever 16 in the direction of the arrow 21 to position the gripper 15 and cop 2 vertically above a spindle 8.
  • the carriage-­mounted device is advanced to the position of the next spindle, after which the aforesaid operations are repeated to complete the yarn turn windings on all the cops.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP89201240A 1988-05-27 1989-05-17 Procédé pour renvider des spires de fil sur des tubes vides lors du changement de la production dans un continu à filer à anneaux Withdrawn EP0343718A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2076388 1988-05-27
IT20763/88A IT1218005B (it) 1988-05-27 1988-05-27 Procedimento ed apparecchiatura per depositare spire di filo sui tubetti vuoti al cambio di produzione in un filatoioad anelli

Publications (1)

Publication Number Publication Date
EP0343718A1 true EP0343718A1 (fr) 1989-11-29

Family

ID=11171707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89201240A Withdrawn EP0343718A1 (fr) 1988-05-27 1989-05-17 Procédé pour renvider des spires de fil sur des tubes vides lors du changement de la production dans un continu à filer à anneaux

Country Status (2)

Country Link
EP (1) EP0343718A1 (fr)
IT (1) IT1218005B (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1582077A (fr) * 1967-05-08 1969-09-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1582077A (fr) * 1967-05-08 1969-09-26

Also Published As

Publication number Publication date
IT1218005B (it) 1990-03-30
IT8820763A0 (it) 1988-05-27

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