EP4328162A1 - Yarn splicer device with improved tail tearing means and the related operating method - Google Patents

Yarn splicer device with improved tail tearing means and the related operating method Download PDF

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Publication number
EP4328162A1
EP4328162A1 EP23189409.8A EP23189409A EP4328162A1 EP 4328162 A1 EP4328162 A1 EP 4328162A1 EP 23189409 A EP23189409 A EP 23189409A EP 4328162 A1 EP4328162 A1 EP 4328162A1
Authority
EP
European Patent Office
Prior art keywords
yarn
pair
cylinders
thread
rotatable cylinders
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.)
Pending
Application number
EP23189409.8A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ivan BERTOLO
Moreno Floriduz
Roberto PIGHIN
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 Macchine Tessili SpA
Original Assignee
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 Macchine Tessili SpA filed Critical Savio Macchine Tessili SpA
Publication of EP4328162A1 publication Critical patent/EP4328162A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B65H69/06—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • 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 yarn splicer device with improved tail tearing means and the related operating method.
  • yarn splicers are devices widely used in the textile sector to restore the continuity of a yarn following a break or a cut when a quality defect of the yarn is detected.
  • the mechanical splicing cycle with discs comprises the following main steps:
  • the removal of the excess tails undoubtedly represents one of the most critical steps to be managed to ensure the good success of the splice in terms of aesthetic appearance and strength.
  • the main reason is primarily due to the fact that the threads to be discarded must be separated by gradual fraying, in order to better prepare them for the subsequent coupling and retwisting step.
  • the tearing of the excess tails occurs substantially by traction, by means of a pair of clamps which precisely exploit the absence of twisting (and thus of mechanical strength) of the fibres already parallel within the discs.
  • the removed fibrils undesirably adhere to the threads to be preserved, disturbing the correct path of the threads and increasing the risk of frays.
  • the tails are torn as unidirectionally as possible, in a substantially radial direction with respect to the rotation axis of the mutually facing plates, in order to manipulate the tails with firmness and repeatability.
  • Patent IT201900021258A1 proposes tail tearing means comprising a pair of clamps rotatable around respective pins to grasp the tails and pull them outside the splicer according to a substantially radial direction with respect to the plates.
  • this implies an increase in the overall dimensions of the device in operation and a limitation in the range of workable yarns (especially stretch yarns) for the above reasons.
  • reference numeral 4 globally denotes a yarn splicer device.
  • thread or single thread or continuous thread refers to a single filament or continuous filament (for example in the case of silk, artificial or synthetic fibres), while the term yarn refers to a group of fibrils of varying lengths which are paralleled and joined together by twisting.
  • thread or single thread or continuous thread refers to a single filament or continuous filament (for example in the case of silk, artificial or synthetic fibres)
  • yarn refers to a group of fibrils of varying lengths which are paralleled and joined together by twisting.
  • one or the other term will be used indifferently, it being understood that the applications of the present invention are not limited to one or the other type.
  • the yarn splicer device 4 comprises a pair of opposite plates 8,12 which are rotatable with respect to a common drive axis X-X.
  • the plates 8,12 are spaced apart from each other, along said drive axis X-X, so as to identify a passage path 14 of a first yarn 16 ending with a first thread 20 and of a second yarn 24 ending with a second thread 28, to be mutually spliced.
  • the yarn splicer device 4 advantageously comprises tail tearing means 32, configured to grasp and tear tails 36 of said first and second thread 20,28, so as to obtain tearing points 40 positioned at least partially inside said passage path 14 of the first yarn 16 and of the second yarn 24.
  • the tail tearing means 32 comprise a first pair of counter-rotating rotatable cylinders 44, configured to clamp the tail 36 of said first thread 20 and/or a second pair of counter-rotating rotatable cylinders 48, configured to clamp the tail 36 of said second thread 28.
  • the tail tearing means 32 comprise at least one pair of rotatable cylinders 44,48.
  • the rotatable cylinders of said first pair of rotatable cylinders 44 and/or of said second pair of rotatable cylinders 48 are rotatably supported about rotation axes Y-Y parallel to said drive axis X-X of the opposite plates 8,12.
  • said first and second pair of rotatable cylinders 44,48 are arranged in diametrically opposite positions with respect to the drive axis X-X of the plates 8,12.
  • said first and second pair of rotatable cylinders are arranged externally with respect to the plates and the passage path of said first and second yarn.
  • the tail tearing means 32 are therefore of the rotational type, consisting of pairs of rotatable cylinders 44,48 configured so as to at least partially clamp at least one parallel tail 36 and to tear it. It is thereby possible to pull tails for a theoretically infinite length as a function of the specific needs of the fibre to be treated, in particular for stretch and/or long-fibre yarns. Furthermore, a rotational type solution allows to tear the tails 36 according to a constant direction (radial, i.e., perpendicular and incident with the drive axis X-X) and to limit the operating dimensions of the yarn splicer device 4.
  • said pairs of rotatable cylinders 44,48 comprise a motor cylinder 60 and an idle cylinder 64 driven by the motor cylinder 60.
  • each motor cylinder 60 is controlled by a dedicated motor (not illustrated).
  • This embodiment allows to customize the stroke and/or the tearing speed by selecting the number of rotations and/or the angular speed of the motor cylinder 60, respectively, according to the specific needs.
  • said dedicated motor is a stepper electric motor.
  • this type of electric motor allows precision positioning at low speed.
  • At least one of said cylinders 60,64 of the first and/or second pair of rotatable cylinders 44,48 has a rubbery material surface coating and/or a knurling surface treatment and/or a roughening surface treatment, in order to increase the gripping force on the tails 36 of said threads 20,28.
  • the cylinders 60,64 of each pair of rotatable cylinders 44,48 are at least partially in contact with each other so as to obtain a mutual contact pressure and drag the driven idle cylinder 64 by friction.
  • means are included for adjusting said mutual contact pressure between the cylinders 60,64 of at least one of said pairs of rotatable cylinders 44,48.
  • the pair of motor cylinders 60 and idle cylinder 64 can also be used as stretching means. This helps to simplify the mechanical and electrical architecture of the device, reduce the weight and reduce the probability of failure thereof.
  • the present invention makes it possible to overcome the drawbacks mentioned in the prior art.
  • the present invention solves the drawbacks of the prior art and allows to achieve considerable technical advantages, such as:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP23189409.8A 2022-08-26 2023-08-03 Yarn splicer device with improved tail tearing means and the related operating method Pending EP4328162A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102022000017667A IT202200017667A1 (it) 2022-08-26 2022-08-26 Dispositivo giuntafilo con mezzi di strappo code perfezionati e relativo metodo di funzionamento

Publications (1)

Publication Number Publication Date
EP4328162A1 true EP4328162A1 (en) 2024-02-28

Family

ID=83899960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23189409.8A Pending EP4328162A1 (en) 2022-08-26 2023-08-03 Yarn splicer device with improved tail tearing means and the related operating method

Country Status (3)

Country Link
EP (1) EP4328162A1 (zh)
CN (2) CN117626488A (zh)
IT (1) IT202200017667A1 (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078776A2 (en) * 1981-11-04 1983-05-11 Officine Savio S.p.A. Splicer device to disassemble and recompose yarn mechanically
US4397138A (en) * 1980-08-02 1983-08-09 W. Schlafhorst & Co. Method and device for joining textile threads by splicing with the aid of compressed air
US4637205A (en) 1983-10-04 1987-01-20 Officine Savio Spa Splicer device for the mechanical splicing of textile yarns
IT201900021258A1 (it) 2019-11-15 2021-05-15 Hayabusa S R L Dispositivo di giunzione di fili tessili e relativo metodo di giunzione

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4397138A (en) * 1980-08-02 1983-08-09 W. Schlafhorst & Co. Method and device for joining textile threads by splicing with the aid of compressed air
EP0078776A2 (en) * 1981-11-04 1983-05-11 Officine Savio S.p.A. Splicer device to disassemble and recompose yarn mechanically
US4637205A (en) 1983-10-04 1987-01-20 Officine Savio Spa Splicer device for the mechanical splicing of textile yarns
IT201900021258A1 (it) 2019-11-15 2021-05-15 Hayabusa S R L Dispositivo di giunzione di fili tessili e relativo metodo di giunzione

Also Published As

Publication number Publication date
CN221254820U (zh) 2024-07-02
IT202200017667A1 (it) 2024-02-26
CN117626488A (zh) 2024-03-01

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