US3593511A - Twisting head for textile machine - Google Patents

Twisting head for textile machine Download PDF

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Publication number
US3593511A
US3593511A US4669A US3593511DA US3593511A US 3593511 A US3593511 A US 3593511A US 4669 A US4669 A US 4669A US 3593511D A US3593511D A US 3593511DA US 3593511 A US3593511 A US 3593511A
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US
United States
Prior art keywords
yarn
grip
insertion device
twisting
aperture
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
US4669A
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English (en)
Inventor
Claude Guignard
Jean Pellaton
Maurice Poull
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.)
Electrospin Corp
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Electrospin Corp
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Filing date
Publication date
Application filed by Electrospin Corp filed Critical Electrospin Corp
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Publication of US3593511A publication Critical patent/US3593511A/en
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    • 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
    • D01H1/11—Spinning by false-twisting
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques

Definitions

  • ABSTRACT A supporting and driving head for a radially 57/34, 57/59, 57/106 clamping grip having a venturi-type member in axial align- [51] 23/08,
  • This invention relates to a textile machine twisting head for twisting a continuously moving yarn. More particularly it relates to a radially clamping grip for manufacturing yarn by the open-end spinning method in which loose fibers are individually conveyed by aerodynamic or electrical means from a discharge member to the loose end of a formed yarn held and rotated by the clamping grip.
  • This invention discloses a clamping grip for open-end spinning which has unitary means for simplifying the process of threading the end of formed yarn into the grip.
  • false twist member to twist thefibers and thus to replace'the ring and traveler system used in conventional spinning methods.
  • a known type of false twist" member is that by which the yarn, asit is twisted and formed, is clamped radially by various means and is allowed to slide axially through the member in a continuous motion. Insertion of the end of formed yarn into the clamping member for the purpose of threading up, when starting the machine or following a yarn break, has been a difficult and time-consuming operation. This has been so, mainly because the insertion has tobe done in the direction opposite to that-in which the yarn travels during operation.
  • the present invention provides a twisting head not having the above disadvantages which'enables the yarn to be inserted rapidly without requiring any mechanical movements, and which-lends itself readily to automation of this insertion operation.
  • This twisting head comprises a sliding grip havingan inlet for the raw textile material and an outlet for the twisted yam with internal means for radially clamping yarn while permitting it to slide axially in a continuous manner toward "the outlet.
  • A'pneumatic insertion device having an inlet for drawing in the loose yarn by suction forces and an outlet for ejecting theyarn, is disposed to form an extension of, and in alignment with, the outlet of the slidinggrip. The outlet of the insertion device is contiguous to the outlet of the sliding grip.
  • a rotary grip holder has a chamber for containing the sliding grip for coaxial rotation therewith'and has a tubular terminal member surrounding at least the outlet of the-insertion device.
  • the grip holder is supported for rotatively driving the sliding grr I is the general object of the invention to devise a twisting head for the radially clamping gripof open-end type spinning machines which may .bethreaded up more conveniently than those heretofore and which will lend itself for use with automated operation.
  • FIG. 1 is an axial section of thefirst embodiment
  • FIG. 2 shows a portion of the device in'FIG. l in the position for yam insertion, I
  • FIG. 3 shows the device of FIG. V1 with yarn inserted
  • FIG. 4 is a vie'w of a second embodiment shown partially in elevation and partially in section
  • FIG. 5 is an axial section seen atright angles in relation to FIG. 4 showing the yarn position during insertion
  • FIG. 6 is a cross section taken on line VI-VI of FIG. 5.
  • the sliding grip of this invention is the radially clamping type by which a length of yarn or other filiform object is per mitted to slide axiallythrough the grip while being held in axial alignment by a series of centripetal forces radially applied.
  • FIG. 1 the twisting head ofthe invention is illustrated in cross section with the three major components broadly.
  • the sliding grip l radially clamps a sliding object by springforces exerted by a plurality of flexible filaments which are arched so as to form together a,
  • the flexible filaments lie in a bunch6 at the outlet-end of the grip l and have their fixed ends substantially equiangularly arranged about the axis 7.
  • Each of the flexible filaments isseeured at its outlet endS to aringlike crown 8 with the inlet Sand outlet end 6 defining an aperture along the axis 7 of the grip '1.
  • the flexible filamentsof the'grip' provide radial clamping forces upon the length of yarn 29 while permitting it to slide 1 axially through the outlet end. It is because of the sliding movement of the yarn lengthwise'thatthe grip is called a slid wall 12 axially-of the'hole 13 to project toward the inlet end 5.
  • the length of the hollow cylinder I4 and the length of axial movement afforded the mobile member 10 are such that when the grip is in its uppermost position-(FIG. 2) the cylinder 14 will enter the bow net 4 in such a'manner as to move the flexible filaments apart and will open the-outlet end 6 of the grip, and sueh'that when the grip is in its'lowermost-position (FIG. I) the cylinder 14 will be disengaged from the bow net 4 so that the flexible filaments may move freely toward one another.
  • the gripholder 3 has a-tubular terminal section 15 which partially surrounds the insertion device 2. The terminal section 15 is mounted for high-speed rotation on roller bearings 16 and '17 about the axis 7 under the action of a pulley'l8 and adriving belt 19.
  • the pneumatic insertion device 2 comprises a suction tube 20 inside of which extends a propulsiontube 21.
  • the outlet 22 of suction tube 20 is surrounded bythc terminal member 15 of the grip holder 3, whereas the inlet .23 of suction tube 20 is shaped as a funnel.
  • the outer end portion 24 of the propulsion tube 21 is fitted to a flexible pipe 25 for connecting with a source of air under pressure (not shown).
  • the space provided between the suction tube 20, which-is'stationary, and the tubular terminal section 15 is large enough to allow rotation without causing frictiombut is sufficiently small to prevent excessive leakage of air when introduced from the inner end portion 26 of the propulsion tube 21 outof the-outlet 22 of the suction tube 20.
  • the device In operation, when yarn is to be inserted, either for priming the head or following a yarn break, the device will be unthreaded as seen in FIG. 1, where a loose end 27 of a length of formed yarn is supported on an eyelet 28. Air under pressure is fed in through the flexible pipe 25 which will slightly pressurize the lower portion 9a of the chamber 9 and thrust by venturi effect through the inlet funnel 23. The moving air will lift the yarn end 27 upwardly through the aperture between the flexible filaments, as well as through the hollow cylinder 14 and central hole 13. Upon interrupting the flow of compressed air, the pressurization of the lower portion 9a of the chamber ceases, and under the elastic action of the flexible filaments, the grip moves to the position of FIG. 3, allowing the flexible filaments to apply clamping forces upon the yarn 29. The pull that is exerted upon the yarn 29 when spinning is in progress helps to release the bow net 4 from the hollow cylinder 14.
  • the yarn insertion is effected by a purely axial movement.
  • the advantage is that it is not necessary to interrupt the rotation of the grip holder to insert yarn since the hollow cylinder 14 and the grip 1 are angularly fixed relative to one another, their only relative movement being the axial displacement of the grip 1.
  • the pneumatic insertion device 2 is identical to that shown in FlGS. l 3 and the rotary grip holder 3 only differs in that it has no grooves 11.
  • the grip has no movement in relation to the grip holder and does not slide within the enclosing chamber. It comprises a body 31 which has at its upper end a supporting shoulder 32 and which has a hole 33 extending therethrough.
  • the body 31 has a series of meridian slots, such as slot 34, which serve to guide the flexible filaments of clamping member.
  • the flexible filaments are arched and arranged around the axis 7 of the body 31 (FIG. so as to form an inlet bow net 35 extended by a bundle 36 which is housed in the axial hole 33.
  • the body 31 is cut a semimeridian groove 37 which extends from the periphery of the body to the axial hole 33. Unlike the slots 34 which do not extend through the shoulder 32, the groove 37 extends throughout the full length of the body 31 and shoulder 32.
  • the groove 37 is defined by sides 38 and 39 (FIG. 6) which are so profiled as to have a divergent shape and which in regard to shape and position are mutually symmetrical in relation to its mean plane 40.
  • an engagement surface 42 (FIGS. 4-5) in the form of a ruled or developed surface whose generatrices are perpendicular to the mean plane 40. It is further recommended to round off the junctions of the sides 3839 with the outer surface of body 31 and with the engagement surface 42 whereby the sharp edges on which the yarn might catch will be made to disappear.
  • the grip As the grip is intended to rotate at high speed around the axis 7, it is essential to balance it at least statically, for example, by machining a counterbalancing flat surface 43 on the side of body 31 opposite groove 37.
  • the.twisting head enables the yarn to be rapidly inserted without resorting to special tooling. All that is required is to actuate a valve (not shown) which controls'the flow of a compressed gas through pipe 25. ln this specification the gas has been referred to as compressed air, however, other gasses could be used as well.
  • a twisting head for twisting a normally continuously moving yarn comprising:
  • a radially expansible and contractable yarn grip having a central through aperture having an inlet and an outlet and adapted to radially clamp the periphery of a yarn therein while allowing axial sliding motion of the yarn therethrough, the trailing end of such yarn being normally disposed anterior to said grip inlet, and
  • a normally inoperative yarn insertion device having a through passage in axial alignment with said yarn grip adjacent said yarn grip outlet and through which the yarn normally passes from said yarn grip, said insertion device being operable to retrieve the trailing end of a length of yarn which has passed through said grip and said insertion device incident to the interruption of proper yarn spinning and to restore said yarn to a position in which it extends through said grip and said insertion device and its trailing end is again anterior to said grip inlet end.
  • twisting device defined in claim 1 further comprising means for expanding the through aperture of said yarn grip prior to the retrieval and restoration action of said yarn insertion device and for permitting contraction of said yarn gri once the trailing end of the yarn length has been restored to its position anterior to said grip inlet end.
  • twisting device defined in claim 4, further comprising a rotary grip holder having a chamber for containing said yarn grip and including a tubular terminal section positioned so as to surround at least that portion of said insertion device adjacent said yarn grip outlet, said grip holder being adapted to rotate coaxially with said yarn grip and to drive the latter.
  • twisting device defined in claim 6 further comprising:
  • said yarn grip including a plurality of flexible filaments secured equiangularly to form said through aperture, said filaments being arched as a bow net at said inlet end,
  • said expanding means including a hollow cylindrical member fixed axially of said yarn grip adjacent said how net
  • said mobile member being axially slidable toward said cylindrical member by the force of air ejected by said pneumatic insertion device
  • said cylindrical member being adapted to expand said aperture by penetrating said bow net and separating said flexible filaments.
  • twisting device defined in claim 5 further comprising a rotary grip holder having a chamber for containing said yarn grip and including a tubular terminal section positioned so as to surround at least that portion of said insertion device adjacent said yarn grip outlet, said grip holder being adapted to rotate coaxially with said yarn grip and to drive the latter.
  • said side entry slot providing lateral access from the periphery of said body to said through aperture.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US4669A 1969-02-18 1970-01-21 Twisting head for textile machine Expired - Lifetime US3593511A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH241869A CH505229A (fr) 1969-02-18 1969-02-18 Tête de torsion pour machine textile

Publications (1)

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US3593511A true US3593511A (en) 1971-07-20

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US4669A Expired - Lifetime US3593511A (en) 1969-02-18 1970-01-21 Twisting head for textile machine

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CH (1) CH505229A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822539A (en) * 1972-10-24 1974-07-09 Ici Ltd Threadable yarn treatment tube
US4199929A (en) * 1977-07-20 1980-04-29 Verdol S.A. Device for pneumatically threading yarn for a double twist spindle
US4287712A (en) * 1978-07-10 1981-09-08 Palitex Project Company Gmbh Pneumatically disengageable self-threading yarn brake mechanism in a hollow spindle assembly of a textile yarn processing machine and related method
US4539804A (en) * 1983-05-13 1985-09-10 W. Schlafhorst & Co. Method and apparatus for starting the operation of a friction spinning machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333407A (en) * 1964-04-30 1967-08-01 Algemene Kunslzijde Unie Method and apparatus for the doffing of yarn packages
US3372537A (en) * 1965-12-23 1968-03-12 Poull Maurice Radially clamping grips
US3373553A (en) * 1967-01-26 1968-03-19 American Cyanamid Co False-twist apparatus
US3445995A (en) * 1966-12-19 1969-05-27 Leesona Corp Strand twisting apparatus
US3448571A (en) * 1966-03-07 1969-06-10 Ryohei Tsuzuki Apparatus for feeding spinning material to a spinning machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333407A (en) * 1964-04-30 1967-08-01 Algemene Kunslzijde Unie Method and apparatus for the doffing of yarn packages
US3372537A (en) * 1965-12-23 1968-03-12 Poull Maurice Radially clamping grips
US3448571A (en) * 1966-03-07 1969-06-10 Ryohei Tsuzuki Apparatus for feeding spinning material to a spinning machine
US3445995A (en) * 1966-12-19 1969-05-27 Leesona Corp Strand twisting apparatus
US3373553A (en) * 1967-01-26 1968-03-19 American Cyanamid Co False-twist apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822539A (en) * 1972-10-24 1974-07-09 Ici Ltd Threadable yarn treatment tube
US4199929A (en) * 1977-07-20 1980-04-29 Verdol S.A. Device for pneumatically threading yarn for a double twist spindle
US4287712A (en) * 1978-07-10 1981-09-08 Palitex Project Company Gmbh Pneumatically disengageable self-threading yarn brake mechanism in a hollow spindle assembly of a textile yarn processing machine and related method
US4539804A (en) * 1983-05-13 1985-09-10 W. Schlafhorst & Co. Method and apparatus for starting the operation of a friction spinning machine

Also Published As

Publication number Publication date
CH505229A (fr) 1971-03-31

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