US3919833A - Friction false-twist device - Google Patents

Friction false-twist device Download PDF

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Publication number
US3919833A
US3919833A US508832A US50883274A US3919833A US 3919833 A US3919833 A US 3919833A US 508832 A US508832 A US 508832A US 50883274 A US50883274 A US 50883274A US 3919833 A US3919833 A US 3919833A
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US
United States
Prior art keywords
friction element
main friction
yarn
main
contact surface
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
US508832A
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English (en)
Inventor
Lajos Horvath
Arnold Steck
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.)
Heberlein and Co AG
Original Assignee
Heberlein and Co AG
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
Priority claimed from CH1376073A external-priority patent/CH565263A5/de
Priority claimed from CH208374A external-priority patent/CH584778A5/de
Priority claimed from CH721174A external-priority patent/CH572112A5/de
Application filed by Heberlein and Co AG filed Critical Heberlein and Co AG
Application granted granted Critical
Publication of US3919833A publication Critical patent/US3919833A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements
    • D02G1/082—Rollers or other friction causing elements with the periphery of at least one disc

Definitions

  • a main friction element is formed with a yarn contact surface vaulted on all sides and having at least one annular groove transverse of its axis of rotation and a secondary friction element has at least one annular disc extending transversely with respect to its rotation axis and mating with the groove.
  • Guide means feed and withdraw the yarn transversely with respect to the axis of rotation of the main friction element.
  • This invention relates to apparatus for imparting false twist to textile yarns and, more particularly, to such apparatus wherein the twist is imparted by bringing the yarn into contact with rotating surfaces.
  • the central discs, or at least their rims may consist of a material having a high friction coefficient with respect to the textile yarn and the discs at the ends of the disc arrangements, or at least their rims, may consist of a material with high wear-resistance, for example steel.
  • the preferred material with a high friction coefficient is a synthetic material on a polyurethane base which however is subject to high wear, so that the respective discs or their rims must be exchanged frequently.
  • our device comprises friction elements arranged on two parallel rotation shafts, the circumferences of which elements partially, mutually overlap.
  • the device of the present invention is characterized in that it consists of a main friction element of wear-resistant material which comprises a yarn contact surface vaulted on all sides and at least one annular groove extending transversely with respect to its rotation axis, as well as a secondary friction element with at least one circular or annular disc extending transversely with respect to its rotation axis, the rim or rims of which mate with the annular groove or grooves of the main friction element.
  • Guide means are provided for feeding and withdrawing the textile yarn transversely with respect to the rotation axis of the main friction element.
  • the disc or discs of the secondary friction element, or its rim or rims may preferably consist of a material having a high friction coefficient with respect to textile yarns of synthetic material, for example polyurethane synthetic material, in which case rapid wear of the disc rims does not occur, but on the other hand,
  • the main friction element may preferably have the shape of a sphere, of an ellipsoid or a shape similar to that of an ellipsoid.
  • the main friction element may be formed of an aluminum base element which has previously been rough ened as by sand-jet treatment, or it may consist of metal oxide ceramic material, materials with a ceramic coating, cast iron or a compound material of silicium car bide and polyurethane synthetic material.
  • main friction elements made from the abovementioned materials provides the advantages mentioned when used with a wide-range of yarn structures.
  • the yarn consists of relatively thin monofilaments of the appropriate titer of the single filaments of 2 or 3 dtex, for example, we have observed that superior results can be achieved by forming the main friction element, or at least the outer surface thereof, of polyurethane synthetic material, such as a resilient cross-linking polyurethane sold under the trademark VULKOLLAN. Due to the relatively high friction coefficients of polyurethane synthetic materials with respect to textile yarns of synthetic material, a better driving effect on such yarn, and therefore a high twist density, are achievable along with a substantial reduction in breakages.
  • FIG. 1 is a central longitudinal cross-section through a first embodiment of the invention
  • FIG. 2 is a top elevation of the embodiment according to FIG. 1;
  • FIGS. 3, 4 and 5 are central longitudinal sections through three further embodiments of the invention.
  • the rotation shafts 1 and 2 of the two friction elements are drivable by means of a driving device (not shown) in the same sense of rotation.
  • a spherical main friction element 3 which is provided with three annular grooves 4, 5 and 6, the central groove 5 being positioned in the equatorial zone of the sphere 3.
  • the cylindrical secondary friction element on which are arranged annular discs 8, 9 and 10, and these are maintained at certain distances from each other by spacer rings 22 and 23 and in place on the shaft by terminal rings 21 and 24.
  • the rims of discs 8, 9 and 10 project into or mate with the annular grooves 4, 5 and 6.
  • the spherical shaped main friction element 3 consists of hard-anodized aluminum, roughened by sand-jet treatment; and the annular discs 8, 9 and 10 consist of polyurethane synthetic material, and their diameter is somewhat smaller than the diameter of the main friction element 3.
  • the rotation shafts 1, 2 are shiftable in a direction perpendicular with respect to their longitudinal axes so that projection of the annular discs into the annular grooves can be adjusted, as desired.
  • FIG. 3 illustrates a similar embodiment in which, however, the main friction element 3 comprises only two annular grooves 4, 5; and the secondary friction element consists of a cylindrical polyurethane element 12 comprising two annular discs 13, 14.
  • the main friction element may also comprise, instead of one piece, two spherical or ellipsoid calotte-shaped members and a circular disc 14 between which there are arranged spacer sockets whereby the annular grooves 4 and 5 are formed.
  • FIG. 4 illustrates a further embodiment in which the main friction element 3 consists of two half-spheres l7, 18, with a spacer socket 19 of reduced diameter inserted therebetween by which the annular groove 4 is formed.
  • the secondary friction element consists of a cylindrical polyurethane element which comprises only one annular disc 16. Removal of yarn 11 is effected by deviation by means of roller 20 rotatable about its axis in the same direction as the feed direction.
  • the main friction element may have the shape of a sphere, of an ellipsoid or a similar shape, and the textile yarn which is fed to the rotation axis of the main friction element is applied to the vaulted surface of the main friction element and is pressed against the same by the yarn tension. Imparting of false-twist is therefore mainly effected by frictional contact of the yam with this surface.
  • the yarn passes over the vaulted surface on the side on which it has been fed until it reaches its summit in high-twisted condition, is practically immediately untwisted after passing the summit and thereafter passes over the vaulted surface in detwisted condition until it reaches the point at which it is removed.
  • the part of the main friction element over the yarn contact surface of which the yarn passes in high-twisted condition may consist of a material the friction coefficient of which, with respect to the yarn material, is higher than the friction coefficient of the part of the main friction element over the yarn contact surface of which the yarn passes in untwisted condition.
  • the main friction element 3, arranged on the rotation shaft 1, consists of two halfspheres 21, 22 with intermediate spacer socket 19 by which the annular groove 4 is formed.
  • the secondary friction element arranged on rotation shaft 2 consists of a cylindrical element 15 of polyurethane synthetic material which comprises only one annular disc 16.
  • the half-sphere 21 over the surface of which the yarn 11 passes in high-twisted condition consists of polyurethane synthetic material, and the half-sphere over the surface of which the yarn 11 passes in untwisted condition consists of porcelain. Because of the relatively high friction coefficient of polyurethane synthetic material, a good yarn driving effect, and therefore a higher twist density, can be achieved in the high-twisted yarn. Since no more twist is applied to the yarn during its passage of the half-sphere 22, it is not a disadvantage that porcelain has a relatively low friction coefficient with respect to the synthetic material.
  • Friction false-twist device for textile yarns, comprising two parallel rotation shafts each supporting a friction element, the circumferences of which mutually, partially overlap, characterized by a main friction element formed with at least one yarn contact surface vaulted on all sides and with at least one annular groove and a secondary friction element formed with at least one circular disc, the rim of which mates with the annular groove of the main friction element, and guiding means for feeding and withdrawing the yarn transversely with respect to the rotation axis of the main friction element.
  • Device according to claim 2 characterized in that at least the rim of the secondary friction element consists of polyurethane synthetic material.
  • Device according to claim 5 characterized in that the main friction element consists of metal oxide ceramic material.
  • Device according to claim 1 characterized in that the main friction element consists of cast iron.
  • Device according to claim 13 characterized in that the main friction element consists of cast iron.
  • Device according to claim 5 characterized in that the main friction element consists of cast iron.
  • Device according to claim 1 characterized in that the main friction element consists of a compound material of silicium carbide and of polyurethane synthetic material.
  • the main friction element consists of a compound material of silicium carbide and of polyurethane synthetic material.
  • Device according to claim 5 characterized in that the main friction element consists of a compound material of silicium carbide and of polyurethane synthetic material.
  • the annular grooves in the main friction element are formed by two spherical or ellipsoidal calotteshaped members with at least one circular disc and spacer socket arranged between the discs and the spherical or ellipsoidal members.
  • the annular grooves in the main friction element are formed by two spherical or ellipsoidal calotteshaped members with at least one circular disc and spacer socket arranged between the discs and the spherical or ellipsoidal members.
  • the annular grooves in the main friction element are formed by two spherical or ellipsoidal calotteshaped members with at least one circular disc and spacer socket arranged between the discs and the spherical or ellipsoidal members.
  • the annular groove in the main friction element is formed by two spherical callotte-shaped members and by a spacer socket inserted therebetween.
  • Device according to claim 27 characterized in that at least the surface of the main friction element consists of polyurethane synthetic material.
  • Device according to claim 5 characterized in that at least the surface of the main friction element consists of polyurethane synthetic material.
  • Friction false-twist device characterized in that the part of the main friction ele' ment which forms the vaulted yarn contact surface consists of two different materials.
  • Friction false-twist device characterized in that the part of the main friction element which forms the vaulted yarn contact surface consists of two different materials.
  • Friction false-twist device characterized in that the part of the main friction element which forms the vaulted yarn contact surface consists of two different materials.
  • Friction false'twist device characterized in that the two calotte-shaped members which form the vaulted yarn contact surface consists of two different materials.
  • Device characterized in that the part of the main friction element over the yarn contact surface of which the yarn passes in high-twisted condition, consists of a material the friction coefficient of which with respect to the yarn mate rial is higher than the friction coefficient of the part of the main friction element over the yarn contact surface of which the yarn passes in untwisted condition.
  • Device according to claim 30 characterized in that the part of the main friction element over the yarn contact surface of which the yarn passes in high-twisted condition consists of polyurethane synthetic material.
  • Device according to claim 34 characterized in that the part of the main friction element over the yarn contact surface of which the yarn passes in high-twisted condition consists of polyurethane synthetic material.
  • Device according to claim 30 characterized in that the part of the main friction element over the yarn contact surface of which the yarn passes in untwisted condition consists of ceramic material.
  • Device according to claim 34 characterized in that the part of the main friction element over the yarn contact surface of which the yarn passes in untwisted condition consists of ceramic material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Knitting Of Fabric (AREA)
US508832A 1973-10-01 1974-09-24 Friction false-twist device Expired - Lifetime US3919833A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH1376073A CH565263A5 (en) 1973-10-01 1973-10-01 Friction false-twisting unit - uses abrasion resistant materials to increase component life and reduce maintenance times
CH208374A CH584778A5 (en) 1974-02-14 1974-02-14 Friction false-twisting unit - uses abrasion resistant materials to increase component life and reduce maintenance times
CH721174A CH572112A5 (en) 1974-05-27 1974-05-27 Friction false-twisting unit - uses abrasion resistant materials to increase component life and reduce maintenance times

Publications (1)

Publication Number Publication Date
US3919833A true US3919833A (en) 1975-11-18

Family

ID=27173435

Family Applications (1)

Application Number Title Priority Date Filing Date
US508832A Expired - Lifetime US3919833A (en) 1973-10-01 1974-09-24 Friction false-twist device

Country Status (7)

Country Link
US (1) US3919833A (enrdf_load_stackoverflow)
JP (1) JPS5322180B2 (enrdf_load_stackoverflow)
BR (1) BR7408104A (enrdf_load_stackoverflow)
DE (1) DE2444038C3 (enrdf_load_stackoverflow)
FR (1) FR2245789B1 (enrdf_load_stackoverflow)
GB (1) GB1441689A (enrdf_load_stackoverflow)
IT (1) IT1021670B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002018A (en) * 1975-04-18 1977-01-11 Heberlein Maschinenfabrik Ag Device for modifying the yarn wrap angle in a friction false-twist device
US4051655A (en) * 1975-07-30 1977-10-04 Barmag Barmer Maschinenfabrik Aktiengesellschaft Friction false twister
US4112664A (en) * 1976-10-13 1978-09-12 Heberlein Maschinenfabrik Ag Friction false-twist device
US4120144A (en) * 1975-11-24 1978-10-17 Heberlein Maschinenfabrik Ag. Device for friction false-twisting of textile yarns of synthetic material
CN102272364A (zh) * 2008-11-04 2011-12-07 陶瓷技术有限责任公司 摩擦盘

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005050068A1 (de) * 2005-10-19 2007-04-26 Saurer Gmbh & Co. Kg Friktionsscheibe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287890A (en) * 1964-10-07 1966-11-29 Monsanto Co Apparatus for twisting yarn
US3762149A (en) * 1971-05-14 1973-10-02 Heberlein & Co Ag False-twist device
US3811258A (en) * 1970-10-01 1974-05-21 Socitex Twisting devices for filaments, especially for textile filaments
US3820317A (en) * 1973-08-30 1974-06-28 Heberlien & Co Ag Friction false twist device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513241Y2 (enrdf_load_stackoverflow) * 1971-11-04 1976-01-30
JPS4867538A (enrdf_load_stackoverflow) * 1971-12-22 1973-09-14

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287890A (en) * 1964-10-07 1966-11-29 Monsanto Co Apparatus for twisting yarn
US3811258A (en) * 1970-10-01 1974-05-21 Socitex Twisting devices for filaments, especially for textile filaments
US3762149A (en) * 1971-05-14 1973-10-02 Heberlein & Co Ag False-twist device
US3820317A (en) * 1973-08-30 1974-06-28 Heberlien & Co Ag Friction false twist device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002018A (en) * 1975-04-18 1977-01-11 Heberlein Maschinenfabrik Ag Device for modifying the yarn wrap angle in a friction false-twist device
US4051655A (en) * 1975-07-30 1977-10-04 Barmag Barmer Maschinenfabrik Aktiengesellschaft Friction false twister
US4120144A (en) * 1975-11-24 1978-10-17 Heberlein Maschinenfabrik Ag. Device for friction false-twisting of textile yarns of synthetic material
US4112664A (en) * 1976-10-13 1978-09-12 Heberlein Maschinenfabrik Ag Friction false-twist device
CN102272364A (zh) * 2008-11-04 2011-12-07 陶瓷技术有限责任公司 摩擦盘

Also Published As

Publication number Publication date
JPS5059554A (enrdf_load_stackoverflow) 1975-05-22
FR2245789A1 (enrdf_load_stackoverflow) 1975-04-25
BR7408104A (pt) 1975-11-04
DE2444038A1 (de) 1975-04-03
GB1441689A (en) 1976-07-07
DE2444038C3 (de) 1980-04-17
FR2245789B1 (enrdf_load_stackoverflow) 1978-04-28
DE2444038B2 (de) 1979-08-02
JPS5322180B2 (enrdf_load_stackoverflow) 1978-07-07
IT1021670B (it) 1978-02-20

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