Classifications

• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
  • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
  • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H51/00—Forwarding filamentary material
  • B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
  • B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
  • B65H51/08—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements
  • B65H51/12—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements in spaced relation to provide a series of independent forwarding surfaces around which material is passed or wound
• • 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
  • D02G1/0206—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 by false-twisting
  • D02G1/0266—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 by false-twisting false-twisting machines
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
  • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
  • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
  • D02J1/225—Mechanical characteristics of stretching apparatus
  • D02J1/226—Surface characteristics of guiding or stretching organs
• • 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 invention relates to the treatment of moving yarns to obtain a textured yarn by false twist.
• the invention finds a particularly advantageous application in the case of a machine making it possible to treat partially or unstretched yarns, at speeds greater than 1000 meters per minute, the drawing of the yarns being carried out during the texturing operation.
• the false twist texturing process consists in subjecting the moving wire to a provisional twist and to a heat treatment in the twisted state.
• the wire may possibly be subjected to a fixing treatment.
• the invention applies to any type of single or multi-fi 1 yarn.
• a texturing machine can consist of a plurality of identical working positions mounted on a support frame, each position comprising, successively, if one considers the direction of movement of the yarn during its processing:
• a calling system for delivering the yarn at a predetermined speed inside a texturing zone generally constituted by an oven, a cooling track and a false twist spindle; - a second calling system whose speed is greater than the first, in a manner corresponding to the rate of drawing to be carried out on the wire;
• the stretching phase is carried out on the twisted wire upstream of the false twist spindle, this by simple speed adjustment between the two wire drawing systems provided upstream of the oven and downstream of the spindle of false twist.
• a technique poses implementation problems, in particular in the context of polyester threads, the area in which the necking point is located must be perfectly controlled.
• the first call system located upstream of the oven is constituted by a deliverer comprising a cylindrical bucket associated with a return guide allowing hauling of the wire.
• the bucket is associated with heating means making it possible to maintain it at a predetermined temperature.
• the bucket is positioned relative to the texturing elements so that the twist imparted by the spindle can rise freely to the surface of said delivery bucket.
• the turns of the wire may overlap, being likely to generate a blockage.
• the problem which the invention proposes to solve is to allow the torsion to go up on the bucket, in a controlled manner, thus making it possible to increase the temperature of the bucket which can allow advantageously, in certain cases and depending on the nature of the wire to be treated, to remove the texturing furnace.
• a device has been designed and developed to deliver a yarn in particular in a texturing stretching machine before passing through a processing member such as a false twist spindle, said device comprising a cylindrical cup. associated with a return roller to allow hauling of the wire, said bucket being associated with heating means making it possible to maintain it at a predetermined temperature.
• the bucket and the deflection roller have, in correspondence, spaced grooves formed perpendicular to their generatrices to allow the rise of the torsion communicated by the spindle on said bucket avoiding any overlapping of the turns of the wire.
• the bottom of the grooves is rounded so as to form grooves.
• means capable of causing variations in peripheral speeds of the surface of contact, resulting in cycles of wire tension variation when the latter is on the bucket.
• These means may relate to the shape and / or the arrangement of the grooves of the bucket.
• the idler roller (grooves of different diameters and eccentric grooves). It should also be noted that the same solutions can be envisaged for the idler roller, the latter being able to be free to rotate, either to be driven in rotation by a separate means or by a transmission from the main bucket.
• the diameter of the deflection roller can be any.
• the stretching-texturing machine may comprise, upstream of the texturing zone, and after the delivery device composed of the bucket - return guide assembly, a second cup also grooved and brought to a temperature higher than that of the first cup, eliminating the use of the oven.
• FIG. 1 is a schematic view of an exemplary embodiment of a drawing-texturing machine by false twisting implementing the device according to the invention for delivering the yarn at a predetermined speed inside the texturing zone as such;
• FIG. 2 is a perspective view of an embodiment of the delivery device according to the invention.
• Figure 3 is a view similar to Figure 1 where the texturing oven has been deleted and replaced by a grooved cup according to the invention
• FIG. 4a, 4b and 4c are schematic front views showing different variants of the device, in particular at the level of the diameters of the grooves of the bucket;
• FIG. 5a and 5b are front views, schematic, showing different variants of the device at the eccentricity of the grooves ( Figure 5a) and a combination of eccentricity of the grooves with different diameters ( Figure 5b);
• - Figures 6 and 7 are cross-sectional views considered, respectively, along lines 6-6 and 7-7 of Figure 5a;
• the false-twist texturing machine takes a creel (1) for feeding the treated wire (2), the wire being partially drawn or not stretched.
• a first delivery or calling device (D) enables said thread (2) to be delivered, at a predetermined speed, inside the texturing zone as such, generally consisting of an oven (3), a cooling tunnel (4) and a false twist spindle (5).
• the machine Downstream of the false twist spindle (5), the machine comprises a second calling device (6) whose speed is greater than that of the device (D) and by a value corresponding to the rate of drawing made on the wire (2).
• the machine has means for winding (7) the textured stretched yarn, optionally preceded by a thermal re-fixing oven with a third call device placed immediately before said winding means (7).
• the oven (3), the cooling tunnel (4) and the false twist spindle (5) are aligned, so that the delivery device (D) is positioned relative to the texturing zone (3, 4, 5) to deliver the yarn (2) in such an alignment
• the call device (D) is constituted by a deliverer comprising a cylindrical cup (8) associated with a return guide (9) to allow, in a known manner, the hauling of the wire (2).
• the cup (8) is associated with heating means making it possible to maintain it at a predetermined temperature.
• the bucket (8) and the deflection roller (9) make it possible, as indicated, to make the hairs of the wire (2) emerge, that is to say the formation of turns between the entry zone on the deflection roller (9) at the outlet of the cup (8), the periphery of which is disposed in a tangent or substantially tangent manner with the plane of passage of the thread, inside the texturing zone (3, 4, 5).
• the bucket (10) is positively driven in rotation by any known and appropriate means, while the deflection roller (9) is mounted to rotate freely.
• the bucket (8) and the deflection roller (9) have spaced grooves (8a) and (9a) formed perpendicular to their generatrix.
• the different grooves (8a) all have the same diameter (Dl) at the bottom of the groove.
• the bottom of the different grooves (8a) delimits at least two diameters (D2) and (D3) of different values.
• D2 and D3 can be regularly alternated (FIG. 4c) or in any way, or else, as shown in FIG. 4b, the different diameter values are alternated in groups of equal or different numbers.
• the grooves (8a), of the same diameter or of different diameters, are formed concentrically with the external diameter of the bucket.
• the grooves (8a), with the same diameter of the bottom of the groove or not, may, in whole or in part, be offset relative to the axis (x-x ') of the bucket body (8).
• the eccentric grooves (8a) can be of the same diameter, so that this eccentricity generates, as the bucket is driven, a crank movement.
• This groove eccentricity solution can have many variants.
• the grooves (8a), successive or not, can have eccentricities in different directions, such as, for example, diametrically opposite two by two, offset by a quarter of a turn, a third of a turn or any another angle combination.
• the grooves all have the same diameter (Dl).
• the cup (8) comprises a heating means, for example by induction, making it possible to maintain it within a predetermined temperature range for example between 90 and 130 ° C. approximately.
• the bucket (8) can be constituted by a drum of determined material, to have a low coefficient of friction, to minimize any sliding phenomenon. It is the same with regard to the grooves which may have, at the bottom of the groove, any coating or arrangement to obtain a relatively low coefficient of friction.
• the return guide may consist of a roller mounted to rotate freely.
• the axes of the bucket (8) and the roller (9) may or may not be strictly parallel with respect to each other.
• the deflection roller (9) can also be rotated by a separate means or by a transmission from the main bucket.
• the diameter of the deflection roller can be any.
• the cup (10) is brought to a temperature between 55 ° C and about 130 ° C, while the cup (8) is brought to a temperature between about 130 ° C and 240 ° C. In this case, the presence of the oven is no longer mandatory.
• the bucket (10) / roller (11) may or may not be grooves, the texturing twist cannot go up to this bucket.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=8868624

Family Applications (1)

Country Status (5)

Families Citing this family (5)

Family Cites Families (4)

• 2001
  • 2001-10-19 FR FR0113690A patent/FR2831190B1/fr not_active Expired - Fee Related
• 2002
  • 2002-10-07 CN CN 02823170 patent/CN1589343A/zh active Pending
  • 2002-10-07 EP EP02785522A patent/EP1442165A2/de not_active Withdrawn
  • 2002-10-07 WO PCT/FR2002/003400 patent/WO2003033792A2/fr not_active Ceased
  • 2002-10-07 AU AU2002350821A patent/AU2002350821A1/en not_active Abandoned

Non-Patent Citations (1)

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