Classifications

• • 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

• Apparatus for twisting multifilament threads The invention relates to an apparatus for twisting multifilament threads.
• two friction- spindle devices are retained in a projecting manner beside one another on a carrier.
• the friction spindles share a common belt drive, the belt also driving adjacent apparatus of adjacent processing positions.
• the friction discs of one of the spindle devices are driven at a substantially constant circumferential speed, the thread being guided along an oblique run on their circumferential faces.
• the friction mechanisms acting between the thread and the circumferential face of the friction disc lead to a transverse force for twisting the thread and to a tensile force for conveying the thread being produced on the thread.
• the friction spindles of the friction- spindle device are driven in opposite senses of rotation, such that the threads obtain different senses of twist.
• each of the threads has to be manually threaded into one of the friction- spindle devices at the outset of a process. Since the apparatus are typically arranged in an aligned manner along one longitudinal side of a machine, accessibility and operability from one side have to be made possible. In the known apparatus, the spindle de- vices are offset behind one another, such that piecing is particularly problematic in the case of the rear spindle device. However, a friction- spindle device which is arranged parallel to the operator side can often not be implemented on pre-established machine pitches. In order to produce composite threads within pre-established machine pitches, machine concepts are therefore also known in which a plurality of apparatus having in each case one friction- spindle device are arranged in a row beside one another. However, this can only be implemented in complex machine concepts.
• a further object of the invention lies in providing a particularly operator- friendly apparatus for twisting multifilament threads.
• the object according to the invention is achieved in that an upper friction- spindle device is retained on an upper side of the carrier and a lower one of the friction- spindle devices is retained on a lower side of the carrier.
• the invention is distinguished by a very compact and space- saving arrangement of the friction- spindle devices. In this manner, comparatively tight machine pitches can be implemented in order to twist a multiplicity of multifilament threads in parallel beside one another.
• the refinement of the invention is preferably executed in which the friction spindles of the friction- spindle devices are symmetrically configured, wherein an offset is provided between the upper friction- spindle device and the lower friction- spindle device for separate guiding of the thread.
• the threads can be infed in a singularizing manner to the friction- spindle devices.
• Guiding of threads can be further improved in that the friction- spindles of the upper friction- spindle device, on the protruding ends, are assigned an upper inlet yarn guide for one of the threads and the friction spindles of the lower friction- spindle device, on the carrier, are assigned a lower inlet yarn guide.
• the friction spindles of the upper friction- spindle device, on the carrier are assigned an upper outlet yarn guide and the friction spindles of the lower friction- spindle device, on the protruding end, are assigned a lower outlet yarn guide.
• the friction spindles of the upper friction- spindle device and the friction spindles of the lower friction- spindle device have a common drive. In this manner, all friction spindles can be driven in the same sense of rotation.
• Driving the friction spindles preferably takes place according to the advantageous refinement of the invention in which the friction spindles of the upper friction- spindle device are coupled to one another by an upper torque transfer unit, in which the friction spindles of the lower friction- spindle de- vice are coupled to one another by a lower torque transfer unit and in which the torque transfer units are assigned the drive.
• the friction spindles can advantageously be synchronously driven in the same sense of rotation to produce an identical sense of twist.
• twist may be imparted in various manners.
• the professional world distinguishes between an S-twist and a Z- twist, such that the combinations of S-S, Z-Z or S-Z are possible.
• an electric motor is preferably coupled to a belt drive, wherein a drive gear of the belt drive is coupled to the electric motor and wherein one of the friction spindles of the upper friction- spindle device and one of the friction spindles of the lower friction- spindle device are in each case connected to a drive wheel of the belt drive.
• the drive wheels of the belt drive here are preferably arranged on a drive end of the friction spindles.
• the invention can also be advantageously utilized to combine the upper friction- spindle device and the lower friction- spindle device to form an assembly unit. Double assemblies of this type can be advantageously employed for manufacturing composite threads in texturizing machines.
• the carriers are preferably configured in multiple parts.
• Fig. 1 shows, in a schematic manner, a side view of a first exemplary embodiment of the apparatus according to the invention
• Fig. 2 shows, in a schematic manner, a plan view of the exemplary embodiment of Fig. 1
• Fig. 3 shows, in a schematic manner, a cross- sectional view of the exemplary embodiment of Fig. 1,
• Fig. 4 shows, in a schematic manner, a side view of a further exempla- ry embodiment of the apparatus according to the invention
• FIG. 5 shows, in a schematic manner, a side view of a further exemplary embodiment of the apparatus according to the invention.
• a first exemplary embodiment of the apparatus for twisting multifilament threads according to the invention is illustrated in a plurality of views.
• Fig. 1 shows, in a schematic manner, a front view
• Fig. 2 shows, in a schematic manner, a plan view
• Fig. 3 a cross section in the region of the drive is illustrated.
• the exemplary embodiment is configured as an assembly unit having an upper friction- spindle device 1 and a lower friction-spindle device 2.
• the upper friction- spindle device 1 is arranged in a projecting manner on an upper side 21 of a carrier 5.
• the upper friction- spindle device 1 contains a total of three friction spindles 3.1, 3.2 and 3.3 which, on their circumference, have a plurality of friction discs 6 which are spaced apart and offset in relation to one another.
• the friction discs 6 are arranged in an overlapping manner, the friction spindles 3.1, 3.2 and 3.3 being arranged to form a tri- angle.
• a multifilament thread can thus be guided in the centre of the friction spindles 3.1, 3.2 and 3.3 to produce a twist.
• the friction spindles 3.1, 3.2 and 3.3 are rotatably mounted on the carrier 5 by means of a mounting unit which is not illustrated here.
• the friction spindles 3.1, 3.2 and 3.3 have drive ends in the interior of the carrier 5.
• the drive ends of the friction spindles 3.1, 3.2 and 3.3 are coupled to one anoth- er by a first torque transfer unit 8.1.
• the torque transfer unit 8.1 has a gear belt 9.1 which interacts with toothed wheels 25 which are retained on the circumference of the friction spindles 3.1, 3.2 and 3.3.
• a second lower friction- spindle device 2 having a total of three friction spindles 4.1, 4.2 and 4.3 is arranged on a lower side 22 of the carrier 5. With their free ends, the friction spindles 4.1, 4.2 and 4.3 project vertically downwards.
• the upper friction- spindle device 1 and the lower friction- spindle device 2 are symmetrically configured on the carrier 5, wherein an offset is provided between the upper friction- spindle device 1 and the lower friction- spindle device 2 for the separate guiding of the thread.
• the friction spindles 4.1, 4.2 and 4.3 of the lower friction- spindle device 2 likewise have a plurality of friction discs 7 which are arranged in an overlapping manner. The friction discs 7 are connected in a rotationally fixed manner to the friction spindles 4.1, 4.2 and 4.3, the friction spindles 4.1, 4.2 and 4.3 being arranged to form a triangle.
• the friction spindles 4.1, 4.2 and 4.3 of the lower friction- spindle device 2 are rotatably mounted on the lower side 22 of the carrier 5 by way of a mounting unit which is not illustrated in more detail here.
• Each of the fric- tion spindles 4.1, 4.2 and 4.3 has a drive end which projects in the interior of the carrier 5 and on which a second torque transfer unit 8.2 is configured.
• the torque transfer unit is in this case likewise formed by a gear belt 9.2 and a plurality of toothed wheels 25 which are fastened on the friction spindles 4.1, 4.2 and 4.3.
• the two torque transfer units 8.1 and 8.2 are assigned a common drive 10 for driving the friction spindles 3.1 to 3.3 of the upper friction- spindle device 1 and the friction spindles 4.1 to 4.3 of the lower friction- spindle device 2 in a pre-established sense of rotation.
• the drive 10 is configured as a belt drive and has an electric motor 12 which is coupled to a drive gear 13.
• the drive gear 13 is connected to a motor shaft 16 of the electric motor 12.
• the drive wheel 14.1 is arranged on a free end of the friction spindle 3.3, which projects from the torque transfer unit 8.1.
• the drive wheel 14.2 is coupled in a rotationally fixed manner to the friction spindle 4.3 which likewise has a free end which projects from the torque transfer unit 8.2.
• the drive gear 13 and the drive wheels 14.1 to 14.2 preferably have a toothing which is interconnected via a gear belt 11.
• the gear belt 11 is preferably made for this purpose on both sides with a toothing.
• the upper friction- spindle device 1 is assigned an upper inlet yarn guide 17 and an upper outlet yarn guide 19 which is configured on the carrier 5.
• the lower friction- spindle device 2 is assigned a lower inlet yarn guide 18 which is configured on the carrier 5 and a lower outlet yarn guide 20 which is retained on the free end of the friction spindles 4.1 to 4.3.
• the carrier 5 is configured in two parts. In this manner, the upper friction- spindle device 1 is retained on an upper plate 23 and the lower friction- spindle device 2 is retained on a lower plate 24. Both plates 23 and 24 have in each case mutually opposing recesses in which the torque transfer units 8.1 and 8.2 and the belt drive 10 are arranged.
• the interior space of the carrier 5 is sealed in relation to the environment by means which are not illustrated in more detail here.
• the exemplary embodiment of the apparatus according to the invention illustrated in Figs. 1, 2 and 3 is preferably employed as what is referred to as a double friction assembly for twisting two threads which are brought together after texturizing to form a composite thread.
• a first thread is infed via the upper inlet yarn guide 17 to the upper friction- spindle device 1 and twisted by the friction discs 6 of the friction spindles 3.1 to 3.3.
• the thread exits the assembly via the upper outlet yarn guide 19.
• the second thread which is guided in an offset manner is infed via the lower inlet yarn guide 18 to the lower friction- spindle device 2 and likewise twisted.
• the thread exits the implement via the lower outlet yarn guide 20.
• the apparatus according to the invention is particularly suited to imple- menting particularly tight machine pitches in texturizing machines.
• the offset between the upper spindle device 1 and the lower spindle device 2 here can be in the range of 0 to 110 mm.
• the apparatus is also particularly suited to twisting single threads in adjacent processing positions of a texturizing machine.
• a device of the apparatus according to the invention is shown in Fig. 4.
• the exemplary embodiment is shown in a side view.
• a plurality of upper friction- spindle devices 1 are arranged beside one another in a row on an upper side 21 on a carrier 5.
• a plurality of lower friction- spindle devices 2 are retained in an offset manner in relation to the upper friction- spindle devices 1.
• the configuration of the upper friction- spindle device 1 and of the lower friction-spindle device 2 here is substantially identical to the exemplary embodiment of Figs. 1 to 3.
• the friction spindles 3.1 to 3.3 of the upper friction- spindle device 1 and the friction spindles 4.1 to 4.3 of the lower friction- spindle device 2 are driven by separate drives.
• a separate electric motor 12.1 is in each case assigned to the upper friction-spindle devices 1.
• the lower friction- spindle devices 2 are driven independently of one another by further electric motors 12.2.
• Fig. 4 the drives of the upper friction spindle device 1 and the lower friction spindle device 2 are schematically illustrated on a right end of the car- rier 5.
• the electric motor 12.1 of the upper friction spindle device 1 comprises a motor shaft 16.1, which holds a drive gear 13.1 at the end.
• the drive gear 13.1 is coupled via a belt drive 10.1 with a drive wheel 14.1 that is supported by one of the friction spindles of the upper friction spindle device 1.
• the torque from one of the friction spindles to the other friction spindles of the upper friction spindle device 1 is transferred by a torque transfer unit 8.1, which is constructed identical to the embodiment of Figure 1. Therefore, reference will be made to the previous description thereof.
• the lower friction spindle device 2 is driven by a second electric motor 12.2 independently from the upper friction spindle device 1.
• the electric motor 12.2 having a motor shaft 16.2 which bears a drive gear 13.2.
• the drive gear 13.2 is coupled via a belt drive 10.2 with a drive wheel 14.2 which is connected to one of the friction spindles of the lower friction spindle device 2.
• the friction spindles of the lower friction spindle device 2 are coupled together by a torque transfer unit 8.2.
• the friction spindle devices 1 and 2 can be driven independently with an S- twist sense or a Z-twist sense for twisting the threads.
• the exemplary embodiment according to Fig. 4 is thus particular well suit- ed to twisting a plurality of threads within a texturizing machine.
• the offset between the upper friction- spindle device 1 and the lower friction- spindle device 2 is equal to half a machine pitch B which is configured between the adjacent upper friction- spindle devices 1.
• driving of the upper friction- spindle devices 1 and of the lower friction- spindle devices 3 could in each case also take place by way of a central drive, such that, for example, the upper friction- spindle devices 1 are driven by a central motor via a common belt drive. Accordingly, the lower friction- spindle devices 2 would be driven by a second separate belt drive. In this case, the friction- spindle devices 1 and 2 can optionally be driven to produce an S-twist or a Z-twist.
• a further exemplary embodiment of a possible modification of the apparatus according to the invention is shown in Fig. 5.
• the upper friction- spindle devices 1 and the lower friction- spindle devices 2 can be arranged to form a plurality on a common carrier 5.
• Each pair of friction- spindle devices 1 and 2 is in each case assigned one electric motor 12 for driving all friction spindles.
• the driving of the two friction spindle devices 1 and 2 is in this case identical to the embodiment of Figures 1 to 3.
• a motor shaft 16 is coupled via a drive gear 13 and a belt drive 10 having two driving wheels 14.1 and 14.2.
• the coupling of the friction spindles of the friction spindle devices 1 or 2 is also arranged via two torque transfer units 8.1 and 8.2.
• the offset between the upper friction- spindle device 1 and the lower friction-spindle device 2 in this exemplary embodiment is identified by the ref- erence sign A.
• the offset A is substantially smaller than a machine pitch B between adjacent friction- spindle devices 1.
• a motor shaft of a motor drives a drive wheel which is connected with a drive gear via a gear belt.
• the drive gear drives one of the friction spindles.
• the torque from the one of the friction spindles is transferred to the other friction spindles by a torque transfer unit.
• the motor shaft of the motor it is also possible to utilize the motor shaft of the motor as at least one of the friction spindles.
• the motor shaft of the motor as the friction spindle 3.3, 4.3, and thus the drive gear 1 , drive wheel 14. 1 , 14.2 and the gear belt can be omitted.
• the apparatus according to the invention can thus be employed in a particularly flexible manner and can be employed as an assembly unit having high flexibility in machines to form a plurality.
• devices in groups are also possible, for example in order to simultaneously serve a plurality of processing positions of a machine.

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

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• 2014
  • 2014-07-02 CN CN201410312158.2A patent/CN105332125B/zh active Active
• 2015
  • 2015-06-29 DE DE112015003086.7T patent/DE112015003086T5/de not_active Withdrawn
  • 2015-06-29 WO PCT/EP2015/064727 patent/WO2016001159A2/en active Application Filing

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