EP1826299B1 - Spinnvorrichtung - Google Patents

Spinnvorrichtung Download PDF

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Publication number
EP1826299B1
EP1826299B1 EP20070001986 EP07001986A EP1826299B1 EP 1826299 B1 EP1826299 B1 EP 1826299B1 EP 20070001986 EP20070001986 EP 20070001986 EP 07001986 A EP07001986 A EP 07001986A EP 1826299 B1 EP1826299 B1 EP 1826299B1
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EP
European Patent Office
Prior art keywords
air
yarn
nozzle
whirling
air current
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EP20070001986
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English (en)
French (fr)
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EP1826299A2 (de
EP1826299A3 (de
Inventor
Itaru c/o Murata Kikai Kabushiki Kaisha Yokota
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Murata Machinery Ltd
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Murata Machinery Ltd
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Publication of EP1826299A2 publication Critical patent/EP1826299A2/de
Publication of EP1826299A3 publication Critical patent/EP1826299A3/de
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    • 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
    • D01H4/02—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 imparting twist by a fluid, e.g. air vortex
    • 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
    • D01H1/115—Spinning by false-twisting using pneumatic means

Definitions

  • the present invention relates to a spinning device comprising a hollow guide shaft having a yarn path formed therein through which a spun yarn is guided, a first air nozzle that generates a whirling air current in a space at an inlet of the yarn path, and a second air nozzle that generates an air current in the middle of the yarn path, as well as a spinning method using the spinning device.
  • a known pneumatic spinning device carries out spinning by exposing a fiber bundle to a whirling air current.
  • the spinning device comprises a hollow guide shaft having a yarn path formed therein and an air nozzle that generates a whirling air current in a space at an inlet of the yarn path.
  • a fiber bundle is fed out toward the yarn path, and the air nozzle is driven (to inject air), and a whirling air current is generated by the air nozzle to separate outer fibers (winding fibers) of the fiber bundle from some fibers left in the center of the bundle (core fibers).
  • the winding fibers then whirl outside the hollow guide shaft and wind around the core fibers to generate a fasciated spun yarn.
  • the spinning device disclosed in the Unexamined Japanese Patent Publication (Tokkai) No. 2003-155630 has an auxiliary nozzle placed in the yarn path in addition to the main air nozzle that generates a fasciated spun yarn.
  • the auxiliary nozzle is an air nozzle that enhances a yarn discharging performance when a fiber bundle is newly passed through the spinning device (discharge the yarn) after yarn cutting for yarn splicing or the like.
  • the auxiliary nozzle generates a whirling air current in the yarn path in a direction opposite to that of an air current generated by the main nozzle to enable the initial yarn discharging.
  • a whirling air current generated by the air nozzle separates outer fibers (winding fibers) of the fiber bundle from some fibers left in the center of the bundle(core fibers).
  • the separated fibers may be discharged from the spinning device without winding around the core fibers. That is, part of the fiber bundle, the material of spun yarns, becomes a fiber loss.
  • a cause of the fiber loss is that the whirling air current forms an air current flowing backward from the inside to the inlet of the yarn path.
  • the fibers in a fiber bundle supplied by a draft section are not caught in a spun yarn being generated. That is, the backward flowing air current may hinder the spinning.
  • an object of the present invention is to reduce a fiber loss that may occur during spinning carried out by a pneumatic spinning device.
  • the spinning device of claim 1 comprising a needle block, a nozzle block and a hollow guide shaft arranged along a yarn feed-out direction in which a spun yarn is fed out, internally a fibre introducing path in the needle block for introducing a fibre bundle, an inversion chamber arranged thereafter and followed by a whirling air current generating chamber, and a yarn path in an axial position of the hollow guide shaft, a first air nozzle forming part of the nozzle block, for generating a whirling air current in the inversion chamber and the whirling air current generating chamber having a component acting towards the yarn feed-out direction, and an auxiliary air nozzle forming part of the hollow guide shaft for enabling a first spun yarn discharge, wherein the whirling direction of the whirling air current of the auxiliary air nozzle is opposite to that of the whirling air current of the first air nozzle.
  • the device further comprises a second air nozzle for generating a second whirling air current forming part of the hollow guide shaft located downstream of the first air nozzle in the feed-out direction.
  • the whirling direction of the whirling air current from the first air nozzle is the same as the whirling direction of the second whirling air current from the second air nozzle which also has a yarn feed-out direction component acting along the yarn path, and the first spun yarn discharging step is executed by injecting air through the first air nozzle and the auxiliary air nozzle and spinning is carried out by continuously injecting air both through the first and the second air nozzle.
  • the first air nozzle and second air nozzle generate a whirling air current in the same whirling direction. This allows the spun yarn to be additionally twisted.
  • the outer fibers separated by the whirling air current generated by the first air nozzle are readily drawn into the yarn path. This reduces a possible fiber loss, and the spun yarn is additionally twisted to increase its strength.
  • a spinning machine 3 will be described with reference to Figure 1 .
  • the spinning machine 3 is an apparatus that blows a whirling air current against a fiber bundle (sliver) 6 to manufacture a spun yarn 9.
  • the spinning machine 3 has a can 5 which is placed at the most upstream position, a draft device 7, a spinning device 10, a yarn feeding device 20, a yarn defect detecting device 30, and a winding device 40 which are sequentially arranged along a path (hereinafter referred to as a yarn feeding path) along which the spun yarn 9 is manufactured from the fiber bundle 6.
  • a yarn feeding path a path along which the spun yarn 9 is manufactured from the fiber bundle 6.
  • the can (sliver container) 5 accommodates the fiber bundle 6 generated by a drawing frame.
  • the spinning machine 3 is one unit of an apparatus that manufactures a spun yarn 9.
  • a plurality of the apparatuses arranged in a line, each of which manufactures a spun yarn, may be called a spinning machine as a whole.
  • the draft device 7 comprises four pairs of draft rollers that draft the fiber bundle between the rollers.
  • the four pairs of draft rollers include a back roller pair 71, a third roller pair 72, a second roller pair 73, and a front roller pair 74 which are arranged along the direction in which the fiber bundle 6 is conveyed.
  • the spinning device 10 manufactures a spun yarn (fasciated spun yarn) 9 by allowing a whirling air current to act on the fiber bundle 6.
  • the spinning machine 3 in accordance with the present embodiment has a spinning speed of 300 to 400 m/min, which is about 20 times as high as that of a ring spinning machine (20 to 30 m/min); the spinning machine 3 is able to achieve high-speed spinning.
  • the yarn feeding device 20 feeds the spun yarn 9 manufactured by the spinning device 10 out to the winding device 40.
  • the yarn feeding device 20 comprises a delivery roller 21 and a nip roller 22 which nip and feed out the spun yarn 9.
  • the yarn defect detecting device 30 detects a yarn defect in the spun yarn 9 being fed to the winding device 40. On the basis of yarn defect detection information from the yarn defect detecting device 30, the yarn defect portion is removed to prevent an improper yarn from being wound into a package 4.
  • the yarn defect detecting device 30 comprises a cutting device (not shown in the drawings) that cuts the spun yarn 9 in response to the detection of a yarn defect.
  • the spinning machine 3 also comprises yarn splicing means (not shown in the drawings) for splicing both ends of the cut spun yarn 9 together.
  • the winding device 40 transversally winds the spun yarn 9 manufactured by the spinning device 10 in an axial direction of a bobbin to form a package 4.
  • the spinning device 10 has a needle block 11, a nozzle block 12, and a hollow guide shaft 13 arranged along a yarn feed-out direction (the direction in which the fiber bundle 6 and spun yarn 9 are fed out) A.
  • the yarn feed-out direction A corresponds to a direction from the top to bottom of Figure 2 .
  • the spinning device 10 internally has a fiber introducing path 11a, an i nvers i on chamber 14, a whirling air current generating chamber 15, and a yarn path 13b through all of which the fiber bundle 6 or spun yarn 9 pass or move.
  • the fiber introducing path 11a, whirling air current generating chamber 15, and yarn path 13b are independent of one another but are in communication with one another via the inversion chamber 14.
  • the spinning device 10 also comprises a first air nozzle 16 which injects air into the inversion chamber 14, and an auxiliary nozzle 19 and a second air nozzle 17 which inject air into the yarn path 13b.
  • the fiber bundle 6 is introduced into the inversion chamber 14 via the fiber introducing path 11a.
  • the fiber bundle 6 introduced in the inversion chamber 14 is unbundled and then twisted by a whirling air current B1 generated in the whirling air current generating chamber 15 by air injected by the first air nozzle 16.
  • the spun yarn 9 is fed out of the spinning device 10 via the yarn path 13b.
  • the needle block 11 is a member that supports the needle 18 which guides the fibers in the inversion chamber 14.
  • the needle 18 advances into the inversion chamber 14 and projects toward the yarn path 13b.
  • the position at which the needle 18 is fixed is adjustable, and the amount of projection of the needle 18 toward the yarn path 13b can be changed.
  • the needle block 11 has the fiber introducing path 11a formed therein.
  • the hollow guide shaft 13 is a member constituting a path (yarn path 13b) through which the spun yarn 9 is passed, and the hollow guide shaft 13 also guides whirling movement of whirling fibers (winding fibers 6a described below) separated from the fiber bundle 6 by the whirling air current B1.
  • the hollow guide shaft 13 is cylindrical and has an inner wall surface forming the yarn path 13b and an outer wall surface forming a guide surface for the winding fibers 6a.
  • the axial direction of the hollow guide shaft 13 aligns with the yarn feed-out direction A, and the hollow guide shaft 13 is symmetric with respect to its axis, and the yarn path 13b is located at the axial position.
  • the inversion chamber 14 is a columnar space, and wall surfaces of two opposite members, the needle block 11 and hollow guide shaft 13, correspond to the opposite bottom surfaces of the columnar space, and an inner wall surface of the nozzle block 12 corresponds to a side surface of the columnar space.
  • An inlet of the yarn path 13b is open into the inversion chamber 14. Accordingly, the inversion chamber 14 constitutes an inlet side space of the yarn path 13b.
  • the whirling air current generating chamber 15 is a space shaped like a truncated cone and a cylinder.
  • the outer wall surface of the hollow guide shaft 13 corresponds to an inner surface of the cylinder.
  • the inner wall surface of the nozzle block 12 corresponds to an outer wall surface of the cylinder.
  • the first air nozzle 16 shown in Figures 2 and 3 , will be described below.
  • the spinning device 10 comprises the first air nozzle 16 as means for generating a whirling air current B1 in the inversion chamber 14 (the space at an inlet of the yarn path 13b) and whirling air current generating chamber 15.
  • the first air nozzle 16 forms a part of the nozzle block 12 and is composed of first nozzle holes 12a, 12a, ... formed in the nozzle block 12 and peripheries of the first nozzle holes 12a, 12a, ....
  • Each of the first nozzle holes 12a is in communication with the whirling air current generating chamber 15.
  • Air is fed through the first nozzle holes 12a, 12a, ... by air supply means (not shown in the drawings) and ejected into the inversion chamber 14.
  • each of the first nozzle holes 12a is formed to communicate with the inside of the whirling air current generating chamber 15 from a tangential direction of the whirling air current generating chamber 15, which is a cylindrical space.
  • air ejected from the first nozzle holes 12a generates a whirling air current B1 in the inversion chamber 14 and whirling air current generating chamber 15 (particularly the whirling air current generating chamber 15).
  • the plurality of the first nozzle holes 12a, 12a, ... are spaced at equal intervals in a circumferential direction of the whirling current generating chamber 15, which is a cylindrical space.
  • a whirling air current B1 that is uniform in the circumferential direction (around the axis extending in the yarn feed-out direction A) is generated in the inversion chamber 14 and the whirling air current generating chamber 15.
  • the whirling air current B1 generated in the inversion chamber 14 and the whirling air current generating chamber 15 whirls counterclockwise around the axis extending in the yarn feed-out direction A.
  • Each of the first nozzle holes 12a is formed generally perpendicularly to the yarn feed-out direction A, and more specifically, the first nozzle holes 12a are inclined toward the yarn feed-out direction A side.
  • the flow of air ejected from the first nozzle holes 12a is provided not only with the whirling component acting around the axis extending in the yarn feed-out direction A but also with a component acting toward the yarn feed-out direction A.
  • the whirling air current B1 generated by the first air nozzle 16 is thus provided with the component acting toward the yarn feed-out direction A. This allows the external air to be sucked through the fiber introducing path 11a, allowing the fiber bundle 6 to be easily introduced into the inversion chamber 14.
  • Spinning is carried out as follows.
  • the fiber bundle 6 is introduced into the inversion chamber 14.
  • the whirling air current B1 generated in the inversion chamber 14 and the whirling air current generating chamber 15 separates outer fibers (hereinafter referred to as winding fibers 6a) from the introduced fiber bundle 6, with some fibers (hereinafter referred to as core fibers) left in the center of the bundle.
  • the whirling air current B1 generated in the inversion chamber 14 and the whirling air current generating chamber 15 flows in the yarn feed-out direction A.
  • the winding fibers 6a whirl while being drawn into the whirling air current generating chamber 15, and wind around the core fibers.
  • the winding fibers 6a are entangled with the core fibers to generate a fasciated spun yarn 9.
  • the auxiliary nozzle 19 is means for enabling the spinning device 10 to first discharge a spun yarn (newly introducing the fiber bundle 6 into the spinning device 10 to start generating a spun yarn 9).
  • the fiber bundle 6 can be sequentially formed into a spun yarn 9 simply by actuating the first air nozzle 16.
  • the auxiliary nozzle 19 At time of yarn discharging, the auxiliary nozzle 19 generates a negative pressure that allows the fiber bundle 6 to be introduced into the yarn path 13b and a whirling air current B3 that flows in a direction opposite to that of the whirling air current B1 generated by the first air nozzle 16. Then, when the core fibers 6 already twisted by the auxiliary nozzle 19 are untwisted downstream side of the auxiliary nozzle 19, the direction in which the core fibers are untwisted is the same as that in which winding fibers 6a wound around the core fibers have been twisted. This allows the winding fibers 6a to wind firmly around the core fibers to generate a kind of yarn before generating a spun yarn 9.
  • the auxiliary nozzle 19 generates an air current (whirling air current B3) in the yarn path 13b, and the air current has the component (1) acting in the yarn feed-out direction A and the component (2) acting around the axis extending in the yarn feed-out direction A.
  • the component (1) acting in the yarn feed-out direction A makes the air pressure in the yarn path 13b negative with respect to the air pressure in the inversion chamber 14.
  • the component (2) acting around the axis extending in the yarn feed-out direction A twists the core fibers in the direction opposite to that in which the winding fibers 6a whirl.
  • the auxiliary nozzle 19 forms a part of the hollow guide shaft 13, and is composed of yarn discharging nozzle holes 13c, 13c, ... and the peripheries of the yarn discharging nozzle holes 13c, 13c, ...
  • the yarn discharging nozzle holes 13c are in communication with the inside of the yarn path 13b in the middle of the yarn path 13b.
  • Air is fed through the yarn discharging nozzle holes 13c, 13c, ... by air supply means (not shown in the drawings) and ejected into the yarn path 13b.
  • the auxiliary nozzle 19 is different from the first air nozzle 16 in the place to which air is ejected and in the place in which a whirling air current is generated.
  • the auxiliary nozzle 19 is the same as the first air nozzle 16 in the following points: the nozzle holes are arranged around the axis of the yarn feed-out direction A at equal intervals, the direction in which air is ejected from the nozzle holes is the same as that in which a whirling air current is generated, and the whirling air current is provided with the component acting in the yarn feed-out direction A.
  • the whirling direction of the whirling air current B3, generated by the auxiliary nozzle 19 is opposite to that of the whirling air current B1 generated by the first air nozzle 16.
  • Each of the yarn discharging nozzle holes 13c is formed generally perpendicularly to the yarn feed-out direction A, and more specifically, the yarn discharging nozzle holes 13c are inclined toward the yarn feed-out direction A side.
  • the yarn discharging nozzle holes 13c correspond to areas that are immediately adjacent to and in communication with the yarn path 13b (the peripheries of the openings in communication with the yarn path 13b).
  • the direction in which the yarn discharging nozzle holes 13c are formed allows the flow of air ejected from the yarn discharging nozzle holes 13c to be provided with the component acting toward the yarn feed-out direction A.
  • each of the yarn discharging nozzle holes 13c is formed to communicate with the inside of the yarn path 13b, which is a cylindrical space, from a tangential direction of the yarn path 13b.
  • air ejected from each of the yarn discharging nozzle holes 13c generates a whirling air current B3 in the yarn path 13b.
  • the whirling air current B3 has not only the component acting in the yarn feed-out direction A but also the component acting around the axis extending in the yarn feed-out direction A. However, the whirling air current B3 flows in the direction opposite to that in which the whirling air current B1 flows.
  • the plurality of yarn discharging nozzle holes 13c. 13c, ... are spaced at equal intervals in the circumferential direction of the yarn path 13b, which i$ a cylindrical space, and further, air is uniformly injected through all of the yarn discharging nozzle holes 13c, 13c, ...
  • a whirling air current B3 that is uniform in the circumferential direction (around the axis extending in the yarn feed-out direction A) is generated in the yarn path 13b.
  • the yarn discharging nozzle holes 13c, 13c, ... configured as shown in Figure 4 generate a clockwise whirling air current B3 in the yarn path 13b.
  • the second air nozzle 17 is means for allowing the spun yarn 9 to be more efficiently generated. Specifically, the second air nozzle 17 generates an air current (whirling air current B2) in the yarn path 13b; the air current has the component (1) acting in the yarn feed-out direction A and the component (2) acting around the axis extending in the yarn feed-out direction A.
  • the component (1) acting in the yarn feed-out direction A makes the air pressure in the yarn path 13b negative with respect to the air pressure in the inversion chamber 14.
  • the component (2) acting around the axis extending in the yarn feed-out direction A additionally twists the spun yarn 9.
  • the air pressure in the yarn path 13b is set negative with respect to the air pressure in the inversion chamber 14 because the air injected by the first air nozzle 16 makes the air pressure in the yarn path 13b positive with respect to the air pressure in the inversion chamber 14 (the air flows from the yarn path 13b to the inversion chamber 14).
  • the high pressure of air ejected from the whirling air current generating chamber 15 side to the outside causes air to be sucked from the center toward outer periphery of the inversion chamber 14.
  • some of the winding fibers 6a are discharged from the whirling air current generating chamber 15 side directly to the outside without being entangled with the core fibers. This unfortunately leads to a fiber loss.
  • the spun yarn 9 is additionally twisted in order to enhance the entanglement of the winding fibers 6a with the core fibers to increase the strength of the spun yarn 9.
  • the second nozzle 17 forms a part of the hollow guide shaft 13, and is composed of second nozzle holes 13a, 13a, ... and the peripheries of the second nozzle holes 13a, 13a. ...
  • Each of the second nozzle holes 13a is in communication with the inside of the yarn path 13b in the middle of the yarn path 13b.
  • Air is fed through the second nozzle holes 13a, 13a, ... by air supply means (not shown in the drawings) and ejected into the yarn path 13b.
  • the second air nozzle 17 is different from the first air nozzle 16 in the place to which air is ejected and in the place in which a whirling air current is generated.
  • the second air nozzle 17 is the same as the first air nozzle 16 in the following points: the nozzle holes are arranged around the axis of the yarn feed-out direction A at equal intervals, the direction in which air is ejected from each of the nozzle holes is the same as that in which a whirling air current is generated, and the whirling air current is provided with the component acting in the yarn feed-out direction A. Further, the second air nozzle 17 is the same as the first air nozzle 16 in the whirling direction of the whirling air current.
  • Each of the second nozzle holes 13a is formed generally perpendicularly to the yarn feed-out direction A, and more specifically, the second nozzle holes 13a are inclined toward the yarn feed-out direction A side.
  • the second nozzle holes 13a correspond to areas that are immediately adjacent to and in communication with the yarn path 13b (the peripheries of the openings in communication with the yarn path 13b).
  • the direction in which the second nozzle holes 13a are formed allows the flow of air ejected from each of the second nozzle holes 13a to be provided with the component acting toward the yarn feed-out direction A.
  • air injected by the first air nozzle 16 makes the air pressure in the yarn path 13b positive with respect to the air pressure in the inversion chamber 14.
  • air injected from the second nozzle holes 13a makes the air pressure in the yarn path 13b negative with respect to the air pressure in the inversion chamber 14. This prevents the winding fibers 6a from being discharged from the whirling air current generating chamber 15 directly to the outside without being entangled with the core fibers. This in turn further reduces a possible fiber loss.
  • each of the second nozzle holes 13a is formed to communicate with the inside of the yarn path 13b, which is a cylindrical space, from a tangential direction of the yarn path 13b.
  • air ejected from each of the second nozzle holes 13a generates a whirling air current B2 in the yarn path 13b.
  • the whirling air current B2 has not only the component acting in the yarn feed-out direction A but also the component acting around the axis extending in the yarn feed-out direction A.
  • the plurality of second nozzle holes 13a, 13a, ... are spaced at equal intervals in the circumferential direction of the yarn path 13b, which is a cylindrical space, and further, air is uniformly injected through all of the second nozzle holes 13a, 13a, ...
  • a whirling air current B2 that is uniform in the circumferential direction (around the axis extending in the yarn feed-out direction A) is generated in the yarn path 13b.
  • the second nozzle holes 13a, 13a, ... configured as shown in Figure 5 generate a counterclockwise whirling air current B2 in the yarn path 13b.
  • the second air nozzle 17 is the same as the first air nozzle 16 in the whirling direction of the whirling air current.
  • the spun yarn 9 twisted in the inversion chamber 14 by air injected through the first air nozzle 16 is twisted again (additionally twisted) in the yarn path 13b by air injected through the second air nozzle 17. This further enhances the entanglement of the winding fibers 6a with the core fibers to increase the strength of the spun yarn 9.
  • the spinning method comprises an introducing step of introducing a fiber bundle 6 into the spinning device 10, a yarn discharging step of injecting air through the first air nozzle 16 and the auxiliary nozzle 19, and a spinning step of injecting air through the first air nozzle 16 and the second air nozzle 17.
  • an operator or the like carries the end of the fiber bundle 6 to the neighborhood of an inlet of the fiber introducing path 11a (or into the fiber introducing path 11a).
  • the yarn discharging step is executed by injecting air through the first air nozzle 16 and the auxiliary nozzle 19 at the above state (the end of the fiber bundle 6 lies in the neighborhood of the inlet of the fiber introducing path 11a).
  • the air injection through the first air nozzle 16 and the auxiliary nozzle 19 sucks the external air into the fiber introducing path 11a, while the fiber bundle 6 is drawn into the fiber introducing path 11a and then guided into the inversion chamber 14.
  • the air is sucked into the fiber introducing path 11a because the air injection through the first air nozzle 16 and the auxiliary nozzle 19 makes the air pressure in the inversion chamber 14 and the yarn path 13b negative with respect to the air pressure in the fiber introducing path 11a, with a resultant air flow that sucks the external air into the fiber introducing path 11a.
  • the direction of the whirling air current B1 generated by the first air nozzle 16 is opposite to that of the whirling air current B3 generated by the auxiliary nozzle 19.
  • the fiber bundle 6 is introduced into the yarn path 13b via the inversion chamber 14.
  • the auxiliary nozzle 19 then twists the fiber bundle 6 between the auxiliary nozzle 19 and the needle 18.
  • the fiber bundle 6 is thus converged as the core fibers.
  • the remaining fibers (winding fibers 6a) which are not twisted and thus do not constitute the core fibers of the fiber bundle 6, wind around the core fibers by the whirling air current B1 generated by the first air nozzle 16 in the direction of the whirling air current B1.
  • the core fibers are twisted by the auxiliary nozzle 19 and start to be untwisted upon having passed through the auxiliary nozzle 19.
  • the untwisting occurs in the direction opposite to that of the whirling air current B3, generated by the auxiliary nozzle 19, that is, in the same direction as that of the whirling air current B1, generated by the first air nozzle 16.
  • the untwisting of the core fibers allows the winding fibers 6a to wind more firmly around the core fibers. Then, the winding fibers 6a wind around the non-twisted core fibers by untwisting to generate a kind of yarn.
  • the air injection through the auxiliary nozzle 19 is stopped to end the yarn discharging step. The process then shifts to a normal spinning step.
  • the spinning step air injection is started through the second air nozzle 17; air is injected through both the first air nozzle 16 and the second air nozzle 17.
  • the fiber bundle 6 is guided to the inversion chamber 14, where it is spun as previously described.
  • the spun yarn 9 is then fed out to the outside of the spinning device 10 via the yarn path 13b.
  • the kind of yarn generated in the yarn discharging step is cut during an operation of the yarn splicing means (not shown in the drawings).
  • a stop step is executed to suspend or end spinning. In this case, the air injection through the first air nozzle 16 and the second air nozzle 17 is ended.
  • the spinning step is executed while spinning is being continued. During the execution of the spinning step, air is continuously injected through both the first air nozzle 16 and the second air nozzle 17.
  • the air injection through the first air nozzle 16 generates, in the yarn path 13b, an air flow moving in the direction opposite to the yarn feed-out direction A.
  • the air injection through the second air nozzle 17 generates an air flow which cancels the above air flow and which moves in the opposite direction (that is, the yarn feed-out direction A).
  • an air flow moving in the yarn feed-out direction A is continuously generated in the yarn path 13b. This prevents the winding fibers 6a from being disadvantageously discharged from the whirling air current generating chamber 15 to the outside. This in turn reduces a possible fiber loss.
  • the direction of an air flow generated in the yarn path 13b is not fixedly determined by the largeness or smallness of the pressure of the injection through the first air nozzle 16 and the second air nozzle 17.
  • the direction of the air flow is determined by a set of factors such as the opening areas of the nozzle holes 12a, 13a and shapes of the inversion chamber 14 and whirling air current generating chamber 15.
  • the spun yarn 9 already twisted by the first air nozzle 16 is twisted again in the same direction by the second air nozzle 17, located downstream side of the first air nozzle 16 in the yarn feed-out direction A.
  • the spun yarn 9 is continuously additionally twisted. This increases the intensity of the spun yarn 9.
  • the reduction in fiber loss and the increase in the strength of the spun yarn 9 described above can be achieved by air injection through both the first air nozzle 16 and the second air nozzle 17 on the condition that the amount of air injected (the amount of air injected during a unit time) only through the first air nozzle 16 is the same as the total amount of air injected (the amount of air injected during a unit time) through both the first air nozzle 16 and the second air nozzle 17.
  • the amount of air injected can be reduced by injecting air through both the first air nozzle 16 and the second air nozzle 17 instead of injecting air only through the first air nozzle 16.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (1)

  1. Spinnvorrichtung (10), enthaltend einen Nadelblock (11), einen Düsenblock (12) und einen hohlen Führungsschaft (13), der entlang einer Garnaustragrichtung (A) angeordnet ist, in welcher ein gesponnenes Garn (9) ausgetragen wird,
    im Inneren einen Fasereinführweg (11a) in dem Nadelblock (11) zum Einführen eines Faserbündels (6), eine nach diesem angeordnete Umkehrkammer (14), gefolgt von einer Wirbelluftstrom-Erzeugungskammer (15), und einen Garnweg (13b) in einer axialen Position des hohlen Führungsschafts (13),
    eine erste Luftdüse (16), die einen Teil des Düsenblocks (12) bildet, zum Erzeugen eines Wirbelluftstroms (B1) in der Umkehrkammer (14) und der Wirbelluftstrom-Erzeugungskammer (15), der eine in Richtung der Garnaustragrichtung (A) wirkende Komponente hat, und eine Hilfsluftdüse (19), die einen Teil des hohlen Führungsschafts (13) bildet, um das Austragen eines ersten gesponnenen Garns zu ermöglichen, wobei die Wirbelrichtung des Wirbelluftstroms (B3) der Hilfsluftdüse (19) derjenigen des Wirbelluftstroms (B1) der ersten Luftdüse (16) entgegengesetzt ist,
    dadurch gekennzeichnet, dass
    eine zweite Luftdüse (17) zum Erzeugen eines zweiten Wirbelluftstroms (B2), die einen Teil des hohlen Führungsschafts (13) bildet, stromabwärts der ersten Luftdüse (16) in der Austragrichtung (A) angeordnet ist und die Wirbelrichtung des Wirbelluftstroms (B1) der ersten Luftdüse (16) gleich der Wirbelrichtung des zweiten Wirbelluftstroms (B2) aus der zweiten Luftdüse (17) ist, welcher ebenfalls eine entlang dem Garnweg (13b) wirkende Komponente in Garnaustragrichtung (A) hat, und
    der Austragschritt des ersten gesponnenen Garns ausgeführt wird, indem Luft durch die erste Luftdüse (16) und die Hilfsluftdüse (19) eingeblasen wird, und das Spinnen durch kontinuierliches Einblasen von Luft sowohl durch die erste als auch die zweite Luftdüse (16, 17) ausgeführt wird.
EP20070001986 2006-02-28 2007-01-30 Spinnvorrichtung Active EP1826299B1 (de)

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JP2006285492A JP2007262645A (ja) 2006-02-28 2006-10-19 紡績装置および紡績方法

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DE102007041171A1 (de) 2007-08-28 2009-03-05 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Verfahren und Strickmaschine zur Herstellung einer Maschenware aus im wesentlichen unverdrehtem Fasermaterial
TWI471469B (zh) * 2007-10-02 2015-02-01 Rotorcraft Ag 用於製造針織布的方法和裝置
DE102008008211B4 (de) 2007-12-06 2012-01-26 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Verfahren und Strickmaschine zur Herstellung einer Maschenware aus einem ungedrehten Fasermaterial
DE102008008210B4 (de) 2007-12-06 2013-07-18 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Verfahren und Rundstrickmaschine zur Herstellung einer Maschenware aus einem ungedrehten Fasermaterial
DE202008001797U1 (de) 2007-12-20 2009-06-10 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Maschine zur Herstellung von Maschenware unter zumindest teilweiser Anwendung von Fasermaterial
CH700380A2 (de) 2009-02-13 2010-08-13 Rotocraft Ag Rundstrickmaschine mit integrierten Streckwerken.
JP5515933B2 (ja) * 2010-03-25 2014-06-11 村田機械株式会社 空気紡績装置及び紡績機
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CN102828289B (zh) * 2012-09-18 2014-11-05 东华大学 一种低落纤的空气涡流纺纱装置
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