EP4112522A1 - Spulenseitige fadensaugdüse und spulmaschine, die mit dieser spulenseitigen fadensaugdüse versehen ist - Google Patents

Spulenseitige fadensaugdüse und spulmaschine, die mit dieser spulenseitigen fadensaugdüse versehen ist Download PDF

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Publication number
EP4112522A1
EP4112522A1 EP22173698.6A EP22173698A EP4112522A1 EP 4112522 A1 EP4112522 A1 EP 4112522A1 EP 22173698 A EP22173698 A EP 22173698A EP 4112522 A1 EP4112522 A1 EP 4112522A1
Authority
EP
European Patent Office
Prior art keywords
reel
suction nozzle
reel side
side yarn
comb
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
EP22173698.6A
Other languages
English (en)
French (fr)
Inventor
Massimo Velludo
Valter FARAON
Dante Zancai
Srihari PALANISWAMY
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 EP4112522A1 publication Critical patent/EP4112522A1/de
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
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/44—Arrangements for rotating packages in which the package, core, or former is engaged with, or secured to, a driven member rotatable about the axis of the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
    • B65H67/085—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement end-finding at the take-up package, e.g. by suction and reverse package rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H71/00—Moistening, sizing, oiling, waxing, colouring or drying filamentary material as additional measures during package formation
    • 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 reel side yarn suction nozzle and to a winding machine provided with said reel side yarn suction nozzle.
  • 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 that 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 that 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 produced by the spinning machine and wound into bobbins is unwound by special unravelling means, subjected to quality control by a sensor (yarn cleaner) and rewound by special winding means (cylinder) to form a reel.
  • the yarn cleaner interrupts the winding by cutting the yarn, thus generating two ends, respectively bobbin side and reel side.
  • the joining cycle the aim of which is to remove the defect from the reel and to intercept the two ends so as to position them inside the yarn joiner, which recreates the continuity of the yarn before resuming the winding process.
  • the interception of the free yarn ends is carried out by two dedicated suction nozzles (usually called bobbin side yarn nozzle and reel side yarn nozzle) connected to a device that generates the necessary vacuum to achieve the flow conditions required to pick up the two yarns.
  • the winding cylinder which normally rotates the reel so as to allow the yarn to be wound onto the reel, reverses its rotation in order to bring the free end in the direction of the reel and thus allow the reel side yarn nozzle to suck it in.
  • a reel side yarn nozzle which, when connected to a suitable suction device, generates an air flow that favours the lifting of the yarn end in adherence to the surface of the reel is known.
  • the input section of such a suction nozzle has a suitably shaped and tapered geometry such as to achieve at local level a high-speed flow along the entire width of the reel, measured parallel to the axis of rotation of the tube on which the reel is wound.
  • the winding unit has to repeat the suction cycle several times due to failure to pick up the yarn end, thus decreasing the efficiency of the unit itself and therefore the productivity of the entire machine.
  • Another known technique is the use of special combs, positioned inside the suction nozzle, in direct proximity to the input section thereof, which favour the retention and therefore the gripping of the yarn end.
  • this solution Compared to the nozzle without combs, this solution generally guarantees greater efficiency, but also typically requires operating at a greater distance from the reel in order to prevent so-called "loose loops", i.e. false yarn ends consisting of winding loops that have loosened due to imperfect adherence to the surface of the reel, from being sucked in together with the yarn end.
  • loose loops i.e. false yarn ends consisting of winding loops that have loosened due to imperfect adherence to the surface of the reel, from being sucked in together with the yarn end.
  • reference numeral 4 globally denotes a reel side yarn suction nozzle.
  • said reel side yarn suction nozzle 4 is applied to a winding machine 8 comprising at least one winding unit having a reel 12 in formation.
  • the reel 12 in formation is obtained by winding the yarn around a relative tube 16, in a known manner.
  • the yarn produced and wound into bobbins is unwound by means of special unravelling means, subjected to quality control by a sensor (yarn cleaner) and rewound by special winding means (cylinder 20) to form the reel 12.
  • the yarn cleaner interrupts the winding by cutting the yarn thus generating two ends, respectively the bobbin side yarn end (not illustrated)and reel side yarn end 24.
  • it is first necessary to recover the yarn ends and then join them using a special yarn-joiner.
  • the reel side yarn end 24 is intercepted by the reel side yarn suction nozzle 4 comprising an arm 28 movable from at least one rest position to at least one working or suction position. In the rest position, the arm 28 is in a distanced position or in any case not close to the reel 12, while in the working position the arm 28 is juxtaposed with the reel 12 in order to be able to intercept the reel side yarn end 24.
  • the winding machine 8 is provided with drive means (not illustrated) for controlling the juxtaposition and distancing of the arm 28 with respect to the winding machine 12 in formation, as further described below.
  • the arm 28 is fluidically connected to a suction source (not shown) to create a flow of suction air having a propagation direction X-X.
  • the arm 28 terminates with a suction slit 32 having a rectilinear configuration elongated along a transverse direction T-T.
  • the suction slit 32 with respect to a cross-section plane perpendicular to a first axis of rotation of the associable reel R1 and to a second axis of rotation R2 of the movable arm 28, has an upper lip 36 and a lower lip 40.
  • the upper lip 36 is in a higher position, i.e., further to the side and facing the reel 12, when the arm 28 is brought into the working position. In the resting condition, the arm 28 may be rotated so as to reverse the positions of the lips.
  • said upper lip 36 is set back from said lower lip 40, with respect to a propagation direction X-X of the suction air flow through the suction slit to the reel.
  • the suction slit 32 has a transverse extension L, measured parallel to the transverse direction T-T, which is greater than or equal to the transverse extension of the reel 12, measured parallel to the axis of rotation of the reel R1.
  • suction slit 32 is provided with a deflector 44 and/or a comb 48.
  • deflector 44 and the comb 48 may be present individually or together on the reel side yarn suction nozzle 4.
  • the deflector 44 is oriented so as to induce a pinch of the air flow generated between the associated reel 12 and the suction slit 32, accelerating the air current and thereby facilitating the gripping of the free end of the yarn on the reel side 24.
  • the deflector 44 and/or the comb 48 are arranged at the upper lip 36 of the suction slit 32.
  • the deflector 44 and the comb 48 are arranged on opposite sides with respect to the upper lip 36; in particular, the deflector 44 faces opposite the lower lip 40, i.e., upwards when the arm 28 is in the working position, and the comb 48 faces the lower lip 40, i.e., downwards, when the arm 28 is in the working position.
  • the deflector 44 and the comb 48 are arranged substantially aligned and adjacent to each other.
  • the deflector 44 comprises a plate 56 having side ends provided with chamfered walls 60, i.e. inclined at an angle ⁇ ) of between 20° and 40°, preferably 30°, with respect to said transverse direction T-T.
  • said chamfered walls 60 are connected with a connecting radius R of between 1 and 5 mm, preferably 3 mm, such as to prevent tangles of yarn ends at the deflector.
  • the comb 48 comprises a roughened surface 64 so as to more easily retain the false yarn ends of the reel 12 before they enter the suction slit 32, so as to allow only the free yarn end to be intercepted by the comb 48.
  • the comb 48 comprises a roughened surface 64 obtained by a surface roughening treatment, such as plasma treatment, at a portion of the comb 48 opposite the suction slit 32 and facing the reel 12.
  • a surface roughening treatment such as plasma treatment
  • the roughened surface 64 of the comb 48 has a roughness Ra of between 3 ⁇ m and 20 ⁇ m.
  • the roughened surface 64 has an isotropic roughness profile; in other words, no preferred direction of extension of the roughness grooves can be identified, as is the case, for example, with parallel or cross knurling.
  • the roughened surface 64 extends along the entire transverse width of the comb 48, parallel to the transverse direction T-T, so as to cover the entire transverse extension of the reel 12.
  • the winding machine 8 is provided with a processing and control unit (not illustrated) operatively connected to said drive means and programmed so that, during the suction phase of the reel side yarn end 24, the drive means bring the deflector 44 to a distance d from the lateral surface 52 of the reel 12 of between 1 mm and 5 mm, preferably 3 mm.
  • the control of the arm position 28 by the processing and control unit may take place, for example, with the aid of an optical encoder.
  • the diameter of the reel 12 in formation being known, it is possible to manage the positioning of the reel side yarn suction nozzle 4 with respect to the reel 12 so as to ensure a predetermined distance d of the deflector 44 from the lateral surface 52 of the reel 12.
  • both the deflector and the comb contribute to resolving the technical problem of the present invention, since they improve the catching efficiency of the reel side yarn end.
  • the deflector improves the suction capacity of the nozzle, while the rough surface of the comb makes it easier to retain the suctioned false yarn ends of the reel before they enter the suction slit, so that only the free yarn end can be intercepted by the comb.
  • the two elements i.e. the deflector and the comb, cooperate synergistically with each other since the increase in the suction capacity of the suction slit enables the rough surface to better retain the false yarn ends.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP22173698.6A 2021-06-28 2022-05-17 Spulenseitige fadensaugdüse und spulmaschine, die mit dieser spulenseitigen fadensaugdüse versehen ist Pending EP4112522A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000016862A IT202100016862A1 (it) 2021-06-28 2021-06-28 Bocchetta di aspirazione filo lato rocca e relativa roccatrice provvista di detta bocchetta di aspirazione filo lato rocca

Publications (1)

Publication Number Publication Date
EP4112522A1 true EP4112522A1 (de) 2023-01-04

Family

ID=77627418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22173698.6A Pending EP4112522A1 (de) 2021-06-28 2022-05-17 Spulenseitige fadensaugdüse und spulmaschine, die mit dieser spulenseitigen fadensaugdüse versehen ist

Country Status (3)

Country Link
EP (1) EP4112522A1 (de)
CN (2) CN115594018A (de)
IT (1) IT202100016862A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH334274A (de) * 1953-11-03 1958-11-30 Reiners Walter Dr Ing Saugdüse zum Erfassen, Aufsuchen und Abheben von Fadenenden an einer Garne verarbeitenden Maschine, z. B. einer Spulmaschine
GB2143548A (en) * 1983-07-21 1985-02-13 Hollingsworth Yarn end catching
JPH0451476U (de) * 1990-09-07 1992-04-30
JPH0649457U (ja) * 1992-12-16 1994-07-08 東レエンジニアリング株式会社 サクションマウス
EP2574580A2 (de) * 2011-10-01 2013-04-03 Oerlikon Textile GmbH & Co. KG Kammleiste für eine Saugdüse einer Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine
JP2015044685A (ja) * 2013-08-29 2015-03-12 村田機械株式会社 糸端捕捉装置及び糸巻取装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH334274A (de) * 1953-11-03 1958-11-30 Reiners Walter Dr Ing Saugdüse zum Erfassen, Aufsuchen und Abheben von Fadenenden an einer Garne verarbeitenden Maschine, z. B. einer Spulmaschine
GB2143548A (en) * 1983-07-21 1985-02-13 Hollingsworth Yarn end catching
JPH0451476U (de) * 1990-09-07 1992-04-30
JPH0649457U (ja) * 1992-12-16 1994-07-08 東レエンジニアリング株式会社 サクションマウス
EP2574580A2 (de) * 2011-10-01 2013-04-03 Oerlikon Textile GmbH & Co. KG Kammleiste für eine Saugdüse einer Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine
JP2015044685A (ja) * 2013-08-29 2015-03-12 村田機械株式会社 糸端捕捉装置及び糸巻取装置

Also Published As

Publication number Publication date
IT202100016862A1 (it) 2022-12-28
CN115594018A (zh) 2023-01-13
CN217920800U (zh) 2022-11-29

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