US3685765A - Device for preventing the unwinding of undrawn yarn in drawing machine for synthetic filament yarn - Google Patents

Device for preventing the unwinding of undrawn yarn in drawing machine for synthetic filament yarn Download PDF

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Publication number
US3685765A
US3685765A US116499A US3685765DA US3685765A US 3685765 A US3685765 A US 3685765A US 116499 A US116499 A US 116499A US 3685765D A US3685765D A US 3685765DA US 3685765 A US3685765 A US 3685765A
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US
United States
Prior art keywords
thread
undrawn yarn
guide
friction member
drawing machine
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
US116499A
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English (en)
Inventor
Haruki Takizawa
Masakuzu Fujita
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Teijin Ltd
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Teijin Ltd
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Filing date
Publication date
Application filed by Teijin Ltd filed Critical Teijin Ltd
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Publication of US3685765A publication Critical patent/US3685765A/en
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/18—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only
    • 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
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • a thread deflection guide is positioned on the yarn path, and a friction member at an appropriate position other than the 'yarnpath to cause yarn to meander between the thread deflection guide and the friction member and prevent the undrawn yarn from dangling by gravity by means of the friction therebetween.
  • the unwinding of undrawn yarn by gravity can be prevented with a single device to dispense with the time-consuming preventive measure hitherto manually operated.
  • the present invention relates to a device for preventing synthetic undrawn yarn from unwinding by gravity and falling in a drawing machine for synthetic yarn, particularly preventing the undrawn yarn from unwinding by gravity when it has free ends in front of the drawing machine at the start of operation.
  • synthetic, thermoplastic yam such as polyester and polyamide can be usually melt spun, but
  • the as-spun yarn cannot be put into practical use.
  • the extruded undrawn yarn is wound onto a bobbin held into a creel stand disposed above the drawing machine, drawn off from the bobbin and led into the drawing machine to be drawn to several times the original length.
  • the present invention is to remove the above-mentioned operational inconvenience by preventing the free ends of undrawn yarn from dangling by gravity from the package, that is, by imparting to the undrawn yarn a friction high enough to counteract gravity.
  • the object of the present invention is to prevent the undrawn yarn from being unwound by gravity with a simple device thereby obviating previously required manual operations to prevent unwinding of undrawn yarn.
  • the object of the present invention can be attained with a device for preventing undrawn yarn from unwinding and falling from an undrawn yarn package in a drawing machine, which device is positioned between the drawing machine and a thread feed guide disposed in front of the undrawn yarn package to draw the undrawn yarn off over end from the undrawn yarn package held on a creel stand located above the drawing machine and supply the drawing machine with the undrawn yarn, comprising a thread deflection guide for deflecting the undrawn yarn from the thread feed guide towards a thread guide of the drawing machine and a friction member disposed below the thread deflection guide such that the contact surface of the friction member with the undrawn yarn is present in a zone defined with a perpendicular line drawn from the thread deflection guide and a line connecting the thread deflection guide and the thread guide of the drawing machine whereby when the undrawn yarn is fed to the thread guide of the drawing machine, the undrawn yarn is kept from contact with the friction member and when the undrawn yarn is out between the
  • FIG. 1 is a schematic side view showing the state of the ends of yarn drawn ofi with the. deviceof the present invention from an undrawn yam package placed in a drawing machine.
  • FIG. 2 is a schematic side view showing the undrawn yarn being fed to a drawing machine through the device of the present invention.
  • FIG. 3 is a diagram showing the positioning of a friction member.
  • FIG. 4 is a side view showing means to rotate a sup port plate having a partial cross section.
  • FIG. 5 is a plan view taken along line 5-5 of F IG. 4.
  • undrawn yarn 3 drawn off from undrawn yarn package 2 held on a creel stand 1 is led to a drawing machine'7 (only feed rollers are shown.) through a thread feed'guide 4, a thread deflection guide 5 and a thread guide 6 in front of the drawing machine.
  • the present invention is'characterized by positioning the thread deflection guide 5 and .member 8.
  • the weight of the yarn falls on the surface of the friction member 8 to cause friction between the yarn and the friction member and to thereby prevent the undrawn yarn from falling.
  • the undrawn yarn of a certain length dangles after it has been passed through the feed guide 4 so that it is directly led into the drawing machine 7.
  • the drooping yarn ends fall by gravity to cause the yarn to start to unwind from the package 2.
  • the device of the present invention can readily prevent the unwinding of undrawn yarn.
  • a first condition is the state of the undrawn yarn such as the density and contact surface thereof. These factors may be considered constant in this invention.
  • a second condition is the positioning of the friction member 8 relative to the thread deflection guide 5 and distance therebetween, for instance the positioning and the distance therebetween seen from the standard line prepared by drawing a perpendicular line passing through the center of the thread deflection guide 5.
  • the state of friction member 8 such as a shape should be considered. For example, the shape should be cylin- 3 drical and the greatness of the diameter, the roughness of the v surface, etc. could be other essential factors.
  • position B is tion may be produced between ,theundrawn yarn and lb -f i fi a'm :In IG- 3 l -1a- Vertic l ne-"P s cso mt s r ce Q h' th a ,on
  • a drawing machine is positioned "asshown-in-FIG. l, that is, on the'line b at about 45 with respect to the line a.
  • the undrawn is fed tothe drawingmachine, it runs along the'lin'e b.
  • positions of attachment can also be optionally altered in the following way: More than two holes 17 are bored in the peripheral surface of the support plate 9 toreceive and securely hold the thread deflection guide 5 and the friction member 8 such that the positions of attachment are alterable without rotating the shaft 10.
  • the undrawn yarn 3 is led to the drawing yarn at position 0 in FIG. 2.
  • Theundrawn'yarn ends droopby gravity and make contact with the friction j member 8 to prevent 'the'falling' of the'undrawn yarn I and the unwindingfrom thepackage 2; ⁇
  • the thread deflection guide-5 is preferablyrotatable because when the undrawn yarn is fed to the drawing machine it is betterjto-produce-little friction between the undrawn yarnand the thread deflection guide. It is necessary' to' use as the thread deflection guideone having a shape of a bar' guide or a flanged bar guide in controlling the undrawn'yarn path.
  • Any guide material such as earthenware, titanium porwhen the free ends of the yarn are allowed to dangle ina creasesowing to the increase of contact area. Consequently, the effect of preventing the gravitational unwinding of the undrawn yarn becomes greatwhereas.
  • the undrawn yam is, therefore, subjected to excessive tensioning in a zone'prior to the drawing zone to causellocal drawing inhibit the subsequent unifonn drawing in the. drawing zone.
  • the friction member should be positioned in such a way that it is" not brought into contact with the undrawn
  • FIGS. 4 and. 5 shows means of altering the positions of attachment of the thread deflection guide 5 and the friction member 8 on the support plate 9.
  • a shaft is rigidly fitted to the back and center of the support plate 9with the thread deflection guide 5 and the friction member 8 attached as described above and is rotatably held with a support 11 which is suspended from the drawingmachine (not shown).
  • a screw 11 and'to the front of thescrew 12 is securely fi ted a flange .13.
  • the thread deflection guide 5 is preferably satin finished because the friction on it during the drawing is reduced.
  • the friction member 8 is preferably non-rotatable because'it is. caused to make a-frictional contact with the undrawn yam. It may. be the same as, or different from, the thread deflection guide in itsshapeor material. If it has a surface in contact with the undrawn yarn, the shapeof the friction member isnot lirnitative, The surface is preferablyv treated such that it produces great friction with the yarn. For instance, rubber coating is effective and it is undesirable to be satin finished.
  • the thread guide 4 1 is disposed between the undrawn yarn package 2 and the thread deflection guide 5, but the thread deflection guide 5 may be placed as a pigtail guide at the position tion can completely prevent the spontaneous unwindof the thread feed guide 4 by omitting the thread feed guide.
  • the device of the present invening of undrawn due to gravity by a very simple structure. Threading or removal of yarn ends can be very easily done, and there is no need to wind or-unwind the yarn ends on and from a guide as has been the case with conventional methods. Particularly, when the supply of undrawn yarn to'a drawing machine is to be suspended, one has only to cut it at a point c as shown in FIG. 2. Yarn ends automatically dangle themselves to put the undrawn yarn into the meandering state with the device of the present invention and to prevent it from falling. Thus the present invention provides the advantages of simplifying operations and time is surprisingly reduced. i I
  • a device for preventing undrawn yarn from unwinding and falling froman undrawn yarn package for a drawing machine which device is positioned between the drawing machine and a thread feed guide disposed in front of the undrawn yarn package to draw the undrawn yarn off over end from the undrawn yarn package held on a creel stand located above the drawing machine and supply the drawing machine with the undrawn yarn
  • the device comprising a thread deflection guide for deflecting the undrawn yarn from the thread feed guide towards a thread guide of the draw- 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US116499A 1970-02-20 1971-02-18 Device for preventing the unwinding of undrawn yarn in drawing machine for synthetic filament yarn Expired - Lifetime US3685765A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1970016731U JPS4723805Y1 (es) 1970-02-20 1970-02-20

Publications (1)

Publication Number Publication Date
US3685765A true US3685765A (en) 1972-08-22

Family

ID=11924393

Family Applications (1)

Application Number Title Priority Date Filing Date
US116499A Expired - Lifetime US3685765A (en) 1970-02-20 1971-02-18 Device for preventing the unwinding of undrawn yarn in drawing machine for synthetic filament yarn

Country Status (10)

Country Link
US (1) US3685765A (es)
JP (1) JPS4723805Y1 (es)
BE (1) BE763207A (es)
BR (1) BR7101155D0 (es)
CA (1) CA931333A (es)
CH (1) CH519041A (es)
DE (1) DE2107551A1 (es)
FR (1) FR2078822A5 (es)
GB (1) GB1304152A (es)
NL (1) NL7102249A (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104153069A (zh) * 2014-07-22 2014-11-19 扬中市金德纺织机械设备厂 一种导纱钩装置
US11268216B2 (en) * 2018-07-20 2022-03-08 Saurer Technologies GmbH & Co. KG Yarn-tension influencing device for a twisting or cabling machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1856188A (en) * 1930-12-13 1932-05-03 Crompton & Knowles Loom Works Tension for yarn winders
US2757433A (en) * 1952-09-15 1956-08-07 Barmag Barmer Maschf Yarn drawing device
US2899221A (en) * 1959-08-11 Adjusting means for tension mechanism
US3423045A (en) * 1966-10-19 1969-01-21 Vickers Zimmer Ag Braking device for thread-form material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899221A (en) * 1959-08-11 Adjusting means for tension mechanism
US1856188A (en) * 1930-12-13 1932-05-03 Crompton & Knowles Loom Works Tension for yarn winders
US2757433A (en) * 1952-09-15 1956-08-07 Barmag Barmer Maschf Yarn drawing device
US3423045A (en) * 1966-10-19 1969-01-21 Vickers Zimmer Ag Braking device for thread-form material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104153069A (zh) * 2014-07-22 2014-11-19 扬中市金德纺织机械设备厂 一种导纱钩装置
US11268216B2 (en) * 2018-07-20 2022-03-08 Saurer Technologies GmbH & Co. KG Yarn-tension influencing device for a twisting or cabling machine

Also Published As

Publication number Publication date
JPS4723805Y1 (es) 1972-07-29
FR2078822A5 (es) 1971-11-05
NL7102249A (es) 1971-08-24
CH519041A (de) 1972-02-15
BE763207A (fr) 1971-07-16
GB1304152A (es) 1973-01-24
CA931333A (en) 1973-08-07
DE2107551A1 (de) 1971-10-14
BR7101155D0 (pt) 1973-04-19

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