FR2502193A1 - FLUID NOZZLE FOR MANUFACTURING TEXTURED YARNS - Google Patents

Abstract

FLUID NOZZLE FOR MAKING TEXTURED YARNS. A FLUID NOZZLE FOR MAKING TEXTURED THREADS FROM FILAMENT BEAMS INCLUDES A NOZZLE BODY 14, A NEEDLE 15 INSERTED INTO THE BODY AND ATTACHED THEREIN, AND A DISRUPTIVE ZONE Z OF THE WIRE CONSTITUTED INSIDE THE NOZZLE BODY. A THREAD PASSAGE HOLE 23 IS SHAPED IN THE CENTER OF THE NEEDLE, AND A THREAD PASSAGE HOLE 18 THAT COMMUNICATES WITH THIS NEEDLE PASSAGE HOLE IS ESTABLISHED IN THE BODY OF THE NOZZLE. A FLUID SUPPLY HOLE 21 AND AN ANNULAR THROAT 31 ARE MADE BETWEEN THE NEEDLE PERIPHERY AND THE INTERNAL FACE OF THE NOZZLE BODY, AND ONE OR MORE O-RINGS 34 ARE ATTACHED BETWEEN THE NEEDLE AND THE BODY OF THE NOZZLE. NOZZLE TO AVOID LEAKING FLUID.

Description

Yarns obtained from continuous filaments are

  in general smooth and have a nice touch. For example

  because the spun nylon filaments have a

  circular design and are very slippery, they can not be used in practice without being subjected to a finishing treatment, except when they are used for

special jobs.

  As a result, various methods have been

  to give continuous filament yarns curls, undulations or permanent entanglements for

  give them the flexibility or swelling that does not

  not threads spun from continuous filaments.

  For example, there may be mentioned a method according to

  which entanglements or irregular loops are imparted to the filaments using a turbulence effect

  of a jet of air, in order to make them swelling.

  More specifically, a bundle of filaments is exposed to a turbulent flow of air to shake

  monofilaments from each other and move them violently

  in a disturbing area, the filaments being

  from this disturbing zone without any tension

  imposed on them, and at the moment when the filaments are

  from this disturbing area, loops,

  lations, windings or entanglements are im-

  gone irregularly to the filaments because of the slack given to them, this permitting; to produce a wire

swelling texture.

  In this process which uses an air jet, it is necessary to use a large quantity of air and the process is uneconomical, in particular when dealing with

fine wires.

  The present invention relates to a manufacturing apparatus

  cation textured son and more specifically relates to a fluid nozzle for generating an air jet

  used for the manufacture of textured yarns.

  An object of the present invention is to provide an economical fluid nozzle, in which it is possible to avoid fluid leakage on the input side of the wire.

in the nozzle.

  According to the present invention, it is provided in a fluid nozzle used to manufacture a textured yarn by subjecting a bundle of filaments sent to the nozzle to the action of a compressed fluid, a nozzle itself having a thread passing hole. and a disturbing zone in close proximity to a needle having a passage hole for the eye, which is inserted into the body

  the nozzle through an O-ring attached to the

  turn of the needle. Thanks to this characteristic of structure

  In this way, the leakage of the fluid on the side is avoided, introduction of the wire into the nozzle, and all the fluid passing through the nozzle is sent into the disturbing zone. The utilization rate of the compressed fluid is therefore increased, and this results in a saving in electrical power. If the fluid supply tubes for the pins

  are connected to a main fluid line

  the length of the pins, the same amount of

  fluid acting on the wires is sent to the nozzles of each

  one of the pins and there is no deviation of the amount of the fluid among the pins. It follows that

  the quality of the textured yarns formed in the spindles

  pectives is uniform and that there are no variations in

  the quality of the wire according to the pins.

  The invention will now be described in more detail in

  examples of implementation and with reference to

hereinafter annexed, in which:

  Fig.1 is a schematic view showing the structure of

  ture of an embodiment of the apparatus for producing textured yarns; Fig.2 is a side sectional view showing a

  embodiment of a nozzle according to the present invention.

  tion; and Fig.3 is a side sectional view showing a

  another embodiment of the nozzle according to the invention.

  Referring to FIG. 1, this represents a textured yarn-making apparatus, a bundle of yarns Y1 from a yarn source 2 supported on a creel I moving upwards and being positively driven by rollers 3 and 4, the filament bundle Y1 then running downwards and being introduced into a nozzle at

  fluid 7 arranged in a nozzle box 5. If it is

  haite, the bundle of filaments can pass through a

  6, which applies water to coat the bundle of filaments with water before it is introduced.

in the nozzle.

  The wire leaving the nozzle 7 is taken up without tension by a roller delivery device 10, sent into a heating furnace device 11 where it is thermally fixed, then guided to a winding device 12 and wound

on a reel 13.

  The number of bundles of filaments that are introduced

  in the nozzle 7 is not particularly critical, and one or more beams of

  filaments to the nozzle of the present invention.

  An embodiment of the fluid nozzle according to the

  The present invention is shown in FIG. The nozzle 7 com

  takes a body 14 and a needle 15 inserted into the body 14 to which it is attached. The body 14 comprises a cylindrical hole 16 for the insertion of the needle 15, a conical hole 17 formed at the front end of the hole 16 and in which the sectional area decreases gradually in the direction of the wire advance. , and a hole 18 of passage of the

  wire which communicates with the conical hole 17 and which is

  bound to the outside. This hole 18 for the passage of the wire comprises a parallel tube 19 and a flaring tube 20, the sectional area of which increases in the direction of wire advance. On a portion of the inner circumferential face of the body 14 of the nozzle are formed a compressed fluid supply hole 21 and an annular concave groove 22 arranged so that the opening of the hole 21 is located

  outside the peripheral face of the needle. The Ai

  guille 15 comprises a cylindrical section and a hole 23 through which passes the thread formed in the center of the needle 15,

  which runs entirely through this needle.

  The needle 15 includes a small diameter portion 24 and a large diameter portion 25, and a flange 26 at the rear end of the periphery of the needle 15. The angle of inclination of the tapered face

  27 is the same as the angle of inclination of the inclined face

  born 28 of the body 14 of the nozzle, and a parallel space -; is thus formed between the inclined face 28 and the conical face 27 of the needle. This space communicates with a

  annular chamber 29 formed between the small diagonal portion

  meter 24 of the needle and the internal peri-internal face of the

body of the nozzle.

  An annular concave groove 30 is constituted by

  path of the large diameter portion, and a fluid chamber 51 is defined by the concave groove Y0 and the concave groove 22 of the nozzle body. An oestretrime fluid is

  introduced into the chamber 31, from a feed hole

fluid supply 21.

  The chamber 31 communicates with the chamber 29 via a communication hole 32. The communication hole 32 can

  be one point or two points or more

  ge, circumference. When the hole 32 is formed at a single point, the compressed fluid introduced into the chamber 29 forms a spiral stream which flows forward while constituting a vortex around the small diameter portion of the needle, where he exercises a

action that turns the thread.

  The needle 15 can slide along the inner circumferential lace 14a of the body 14 of the nozzle, and

  the distance between the disturbing zone v defined in the ex-

  Upper tremity of the needle and the body of the nozzle

  is adjustable. An annular concave groove 33 is constituted

  killed at a point of the large-diameter part of 25

  the needle 15 and an O-ring 34 made of a material

  such as a nitrile rubber, is fixed in

  the groove 3355 so that the fluid can not

  to the outside by the weak game existing between the

  peripheral face of the needle 15 and the circumferential face

  internal balance of the body 14 of the nozzle. -

  FIG. 3 represents another embodiment of the fluid nozzle according to the present invention, and in this FIG. 3 the same parts as those already shown in FIG. 2 are designated by the same

  references. In this embodiment, the grooves concave

  Rings 42 and 45 in which are attached O-rings 40 and 41 are made at two points of a needle 39 which is intended to be inserted into a body 38 of a nozzle 37 so that the needle 39 is housed tightly. in the inner circumference of the body

  38 by means of O-rings 40 and 41.

  The configuration and characteristics of the wires

  manufactured using nozzles 7 and 37 above

  the quality, quantity and speed of the

  fluidity, these characteristics being inherent in the

  and the speed of the yarn as well as the type of fibers of the yarn to be treated. To obtain an optimal inflating, it is necessary that the dimensions of the respective organs

  of the device are taken into account. More specific-

  the size of an inlet 35 of the nozzle and the di-

  Mension of an outlet 20 of the nozzle are related to the type and fineness of the thread to be treated. The inlet 35 must be large enough to allow the wire to pass while opposing it with a minimal obstacle dO. friction, and it is preferable to have a guide made of a hard material such as a ceramic material only in

the entrance part.

  To avoid a backflow of the fluid from

  of the disturbing zone Z, the diameter of the

  minimum before 36 of the passage hole of the thread in the needle

  or 39 is less important than hole 23.

  To produce a sudden difference of speed in the wire, one needs a structure determining a

  high diffusion rate of the fluid and it is possible to

  for this purpose, an impact plate reversing the

  fluid jet at the front of the nozzle outlet.

  In the nozzle 7 or 37 mentioned above, the fluid

  from which is sent into the chamber 31 from a compressed fluid supply hole 21 of the nozzle body is introduced into the chamber 29 through the communication hole 32 of the needle 15 or 39 and forced into the inclined space 'which is formed between the needle or 39 and the body 14 or 38 of the nozzle to exercise

  disruptive, tourbillomary and separatory actions

  these on the bundle of filaments. The bundle of filaments

  is discharged to the outside through the extended tube

  at the same time as the jet of fluid, and a sudden difference in velocity occurs in the filaments, which

  causes the formation of loops, waves, ripples

  ments and entanglements in the filaments, this grace

  what is obtained from a textured yarn composed of bulky filaments

flants.

Claims (5)

  1.- Fluid nozzle for the manufacture of text threads   res, characterized in that it comprises a fluid nozzle body (14) provided with a thread passage hole (18) and a fluid supply hole (21), and a needle (15). including a through-hole of centrally-running wire (23) which passes therethrough, said needle being slidably inserted into the cylindrical bore (16) of the nozzle body to form a disturbing zone (Z) of the wire between the inner face of the nozzle body and the outer face of the nozzle, said nozzle being closely attached in the nozzle body via an O-ring (34) secured in the periphery of the needle.   2. Fluid nozzle according to claim 1, characterized   tored in that a number of O-rings   (34) are fixed in the periphery of the needle (15).   3. Fluid nozzle according to one of claims 1   or 2, characterized in that a conical hole (17) whose sectional area decreases in the direction of wire advance is formed at the front end of the cylindrical hole (16) of the nozzle body and communicates with the passage hole of the wire (18) to form a disturbing zone (Z) of the wire, and in that compressed fluid is sent into this zone through the annular space defined by the internal face of the conical hole ( 17) and a conical face (27)   formed at the front end of the periphery of the needle.   4. Fluid nozzle according to claim 3, characterized   the angle of inclination of the conical face   that (27) of the needle is the same as the angle of inclination   of the inclined inner face (28) of the body of the nozzle (14).   5. Fluid nozzle according to claim 3, characterized   in that a first fluid chamber (31) provided with a fluid supply hole (21) and defined by a concave groove of the nozzle body and a concave nozzle groove, and a second chamber ( 29) who communicates with   the fluid chamber (31) via one or more   siches communication holes (32) are formed inside the body of the nozzle this second chamber   communicating with the annular space.