GB1592665A - Yarn texturing apparatus - Google Patents

Description

(54) YARN TEXTURING APPARATUS (71) We, TORAY INDUSTRIES, INC., a Company organized and existing under the laws of Japan of 2, Nihonbashi Muromachi 2-chome, Chuo-ku, Tokyo, Japan, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is performed, to be particularly described in and by the following statement:- The invention relates to a yarn texturing apparatus for producing a multifilament yarn containing complex interfilament entanglement by subjecting a running multifilament yarn to an action of a high speed flow of a gas such as pressurized air or steam.

Yarn texturing apparatus for producing a bulky yarn by subjecting a running yarn to an action of a high speed flow of a fluid are known, for example, from U.S. Patents Nos.

2,994,938 and 3,545,057. Yarns produced by these known apparatus have, however, drawbacks such that the crimps, curls and loops imparted to the individual filaments are not satisfactorily fixed in the yarn and, thus, the yarn has a poor resistance to elongation. Therefore, the yarns can not give the desired bulkiness to fabrics obtained therefrom, since the crimps, curls and loops of the yarn are greatly degraded during the processing for the production of the fabrics, even if the yarn is handled under a relatively low tension. Further, according to the conventional apparatus, the production cost becomes high, since a large amount of fluid is inevitably consumed per unit production of the textured yarn and, also, the yarn texturing speed is relatively slow.In order to improve these drawbacks, there have been proposed apparatus wherein baffles of various types are located at a position opposite to the yarn outlet end of the orifice of a yarn texturing jet device, with the object of increasing the yarn texturing and improving the uniformity of the processing yarn, for example, in U. S. Patent Specification Nos.

3,881,231, 3,881,232, 3,835,510 and 4,041,583. However, these apparatus are still unsatisfactory because the above-mentioned poor resistance to elongation of the produced yarns can not be sufficiently improved.

Embodiments of the present invention seek to provide a yarn texturing apparatus capable of producing a bulky yarn having excellent, high, stable bulkiness while preventing the above-mentioned drawbacks of the prior art.

In accordance with the present invention, there is provided a yarn texturing apparatus for producing a multifilament yarn containing complex interfilament entanglement comprising a housing having inlet and outlet ends connected by a yarn passage, a gas turbulence section in the yarn passage, an exit orifice constituting the yarn outlet and communicating with the turbulence section, and means for introducing pressurized gas into the yarn passage, whereby a multifilament yarn is subjected to the turbulence of the pressurized gas in the turbulence section and, thereafter, is blown out of the exit orifice together with the pressurized gas, the apparatus comprising: a yarn guide for separating said blown filament yarn from said blown gas while guiding said yarn along a guide surface of said yarn guide in a direction substantially perpendicular to the flow direction of said blown gas immediately after the yarn outlet, said yarn guide being provided, outside of said housing and in the proximity of the exit end of said exit orifice, in a location such that said yarn guide does not cross the center-line of said exit orifice, said guide surface of said yarn guide facing a yarn outlet end surface of said housing, the position of said yarn guide being adjustable in the direction substantially perpendicular to the flow direction of said blown gas.

The yarn guide may have a substantially rectangular cross-section or it may be in the shape of a pin having a circular cross-section.

One end of said yarn guide facing the flow of said blown gas may have a tapered surface forming part of said guide surface.

Said tapered surface may be a plane surface and the angle between said plane surface and a surface parallel to the yarn outlet end surface may be from 0" to 60 .

The tapered surface may form a channel in the guide surface of the yarn guide of substantially rectangular cross-section.

The tapered surface may be a peripherally extending channel intermediate the ends of the pin.

An embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which: Fig. I is a cross-sectional view of a yarn texturing apparatus including a yarn texturing jet device and a yarn guide, Fig. 2 is an enlarged cross-sectional view of the yarn outlet portion of the apparatus shown in Fig. 1, Fig. 3 is a cross-sectional view of another yarn texturing jet device, Fig. 4 is a cross-sectional view of a further yarn texturing jet device, Figs. SA through 10A are front views of various types of yarn guides, Figs. SB through 10B are cross-sectional views of the respective yarn guides shown in Figs.SA through lOA, along X-X' lines, Fig. 11 is a perspective view of an apparatus embodying the invention, Fig. 12 is a cross-sectional view illustrating a mechanism for adjusting the position of the yarn guide provided on the apparatus shown in Fig. 11, and Fig. 13 is a front view of the apparatus shown in Fig. 11, partly in section, illustrating a mechanism for engaging the yarn guide with the apparatus.

It is to be understood that Figures 1 to 10 do not per se illustrate embodiments of the invention.

Referring now to the drawings, the apparatus shown in Figs. 1 and 2 includes a yarn texturing jet device 1 and a yarn guide 2. The jet device 1 has a housing 3 constituting the body thereof and having an expanded hollow portion 4 and an exit orifice 12 communicating with the hollow portion 4. Into the hollow portion 4, there is inserted a needle 7, having a yarri inlet 5 and an elongated axial channel 6 extending from the yarn inlet 5. The internal end of the needle 7 is positioned in a turbulence section 8 in an inwardly tapering conical shape provided on the entrance end of the exit orifice 12 and is fixed opposite to the entrance end of the exit orifice. The orifice 12 has a throat 9 having an axis approximately coincident to the axis of the elongated channel 6 of the needle 7 and a trumpet shaped passage 10.The exit end of the passage 10 is opened in the exit end surface 13 of the housing 3 and forms a yarn outlet 11. The hollow portion 4 of the housing 3 is communicated with a gas inlet pipe 14 for introducing a pressurized gas.

A yarn 15 fed from the yarn inlet 5 of the yarn texturing jet device is introduced into the turbulence section 8 through the elongated axial channel 6 of the needle 7. In the turbulence section 8, the yarn 15 is brought into contact with the gas introduced from the gas inlet pipe 14 and the individual filaments of the yarn 15 are separated from each other and deranged by the action of the flow gas.

Then, the yarn is passed through the exit orifice 12 and blown out of the yarn outlet 11 together with the gas of a high speed flow.

The yarn blown with the gas of a high speed flow is drawn out from the flow gas in a direction substantially perpendicular to the flow direction of the gas, immediately after the yarn comes out of the yarn outlet 11. In the proximity of a bend 16, where the yarn changes its running direction, the yarn is subjected to vibration of a very short cycle and thus, it is believed that loops, curls, entanglement and the like are imparted to the individual filaments of the yarn through the vibration so that the yarn becomes bulkY The yarn which becomes a bulky yarn 17 through the change of the running direction at the bend 16 and the formation of the loops and curls of the individual filaments, and of the interfilament entanglement and the like, is then advanced along a guide surface 18 of the yarn guide 2 and is delivered to a conventional take-up device (not shown).

The yarn guide 2 is provided so that it does not cover the exit end of the passage 10. That is to say, the yarn guide 2 is provided so that it does not cross the center-line of the exit orifice 12. Because the guide surface 18 of the yarn guide 2 faces the exit and surface 13 of the housing 3, the yarn 17 can thus pass between the exit end surface 13 of the housing 3 and the yarn guide 2.

It has been found that the provision of the yarn guide 2 in the proximity of the exit end of the yarn texturing jet device 1, can highly improve the resistance of the resulting yarn to elongation so that the bulkiness of the yarn is not lost during the processing for the production of fabrics. It is thus believed that, in the yarn texturing apparatus of the invention, as compared with the known apparatus as hereinbefore mentioned, more violent vibration of the yarn occurring at the bend 16 yields many more loops, curls and the like of the individual filaments and, concurrently, more complex and strong entanglement between the looped and curled filaments. This makes it possible to stably maintain the yielded bulkiness of the yarn.

Although only the texturing of a single single yarn is described in the above, it is to be understood that so-called core and effect yarns can also be produced on the apparatus of the present invention.

It has also been found that the apparatus of the present invention makes it possible to save the pressurized gas necessary to produce a desired textured yarn.

The yarn texturing jet device as shown in Fig. 3 is provided, on the periphery of the needle 7, with a brim 19 having an opening 20 for introducing the gas into the turbulence section 8, so as to divide the hollow portion into two and to limit the flow of the gas fed from the gas inlet pipe 14 to the turbulence section 8. It will be appreciated that, in addition to the above, other types of jet devices may be employed in the apparatus of the present invention, provided that the jet devices have a construction such that a running yarn is subjected to a turbulent action of a high speed flow of a gas and is blown out together with the high speed flow gas.

For example, a yarn texturing jet device as shown in Fig. 4 may further be employed in the apparatus of the present invention. Thus, in Fig. 4, the yarn texturing jet device 1 is composed of a housing 3, an orifice member 3' and needle 7 and is provided with a yarn inlet 5, a yarn outlet 11 and a gas inlet pipe 14. A yarn (not shown) introduced from the yarn inlet 5 of the needle 7 hits upon, at an angle of 45 to 60 , the turbulence flow of a gas fed from the gas inlet pipe 14, and then, is blown out of the yarn outlet 11 of the exit orifice 12 together with the flow gas.

Typical types of yarn guides advantageously usable for the apparatus of the present invention are shown in Figs. 5A through 10A and SB through 10B. Figs. SA through 10A illustrate the front views of the respective yarn guides and Figs. SB through 10B illustrate the cross-sectional views thereof along the X-X' lines shown in Figs. SA through 10A. The yarn guides shown in Figs.

SA, SB; 7A, 7B; 8A, 8B; and 10A, 10B have substantially rectangular cross-section and those shown in Figs. 6A, 6B and 9A, 9B are in the shape of a pin having a circular crosssection. The guide surface 18 of each of the yarn guides shown in Figs. 7A through 10A and 7B through 10B is provided on the bottom of a channel 21.

A construction of the yarn guide wherein the guide surface is formed on the bottom of a channel is preferred, since stable operation of the apparatus can be attained and, thus, a bulky yarn of a uniform quality can be obtained. Also, the use of a yarn guide of the type as shown in Figs. 8A, 8B, 9A, 9B; or 10A, 10B is preferred, because the configuration, such as the size of the loops, of the resulting yarn becomes desirably uniform.

The material for constituting the guide surface 18 of the yarn guide 2 should be selected so as to pass the bulky yarn through the guide surface smoothly. If desired, the guide surface 18 may be subjected to surface treatment to improve the frictional and hardwearing properties thereof, or the guide surface may be exchangeably provided with a member made of a material having a good wear resistant property and low frictional characteristics, for example, a ceramic or super hard alloy material.

In a yarn texturing apparatus embodying the invention shown in Figs. 11, 12, 13, it is possible to adjust the position of the yarn guide 2 in the direction substantially perpendicular to the flow direction of the blown gas.

Referring now to Figs. 11 and 12, a slide bar 27 is connected to a lever 26 to which the yarn guide 2 is secured. The slide bar 27 is slidable in the longitudinal direction along a slide bore 28' formed in a rotational block 28, by means of a male screw 27' provided on the inner side end of the slide bar 27 and a female feed screw 29 engaged with the male screw 27'. The slide bar 27 does not rotate around the axis thereof. The rotational block 28 is pivotably secured to a pivot shaft 31 fixed to a slide block 30. The slide block 30 is slidable along a slide channel 33 formed in a base 32 fixed to the body 24 of the jet device 1 and is secured to the base 32 by a bolt 34.

The rotational block 28 thus can be pivoted around the pivot shaft 31 in the direction of the yarn guide 2 moving away from the yarn outlet end surface 13 of the jet device 1, or vice versa, while being subjected to the action of a coil spring 37 set between a pin 35 secured to the rotational block 28 and a pin 36 secured to the slide block 30. In Fig. 11, 14 denotes the gas inlet pipe, as shown in Figs. 1 and 3.

Referring to Fig. 13 in addition to Fig. 11, the yarn guide 2 is pivotably secured to the lever 26 and is suitably positioned, in the longitudinal direction of the lever 26, by a stop ring 38 stationarily secured to the lever and a compression spring 23 disposed between the yarn guide 2 and the slide bar 27.

The position of the yarn guide 2 in the longitudinal direction of the lever 26 is adjustable by loosening a fixing screw 22 and moving the lever 26 along the axis thereof.

After the yarn guide is desirably positioned, the fixing screw 22 is again tightened. Normally, the yarn guide 2 is pressed against the exit end surface 13 of the jet device 1 by the action of the coil spring 37, so that the bottom surface 25 of the yarn guide is brought into contact with the exit end surface 13 of the jet device. At the beginning of the operation, the yarn guide 2 is removed from the exit end surface 13, so that the yarn guide is positioned at a standby position, and thus, the threading operation can easily be carried out.

Attention is directed to our co-pending Application No. 50851/77 (Serial No.

1 592 664) which describes and claims a yarn texturing apparatus for producing a multifilament yarn containing complex interfilament entanglement comprising a housing having inlet and outlet ends connected by a yarn passage, a gas turbulence section in the yarn passage, an exit orifice constituting the yarn outlet and communicating with the turbulence section, and means for introducing pressurized gas into the yarn passage, whereby a multi-filament yarn is subjected to the turbulence of the pressurized gas in the turbulence section and, thereafter, is blown out of the exit orifice together with the pressurized gas, the apparatus comprising: a yarn guide for separating said blown filament yarn from said blown gas while guiding said yarn along a guide surface of said yarn guide in a direction substantially perpendicular to the flow direction of said blown gas immediately after the yarn outlet, said yarn guide being provided, outside of said housing and in the proximity of the exit end of said exit orifice, in a location such that said yarn guide does not cross the center-line of said exit orifice, said guide surface of said yarn guide facing a yarn outlet end surface of said housing and one end of said yarn guide facing the flow of said blown gas at a distance of 0 to 8 mm from the periphery of said exit orifice.

WHAT WE CLAIM IS: 1. A yarn texturing apparatus for producing a multifilament yarn containing complex interfilament entanglement comprising a housing having inlet and outlet ends connected by a yarn passage, a gas turbulence section in the yarn passage, an exit orifice constituting the yarn outlet and communicating with the turbulence section, and means for introducing pressurized gas into the yarn passage, whereby a multifilament yarn is subjected to the turbulence of the pressurized gas in the turbulence section and, thereafter, is blown out of the exit orifice together with the pressurized gas, the apparatus comprising: a yarn guide for separating said blown filament yarn from said blown gas while guiding said yarn along a guide surface of said yarn guide in a direction substantially perpendicular to the flow direction of said blown gas immediately after the yarn outlet, said yarn guide being provided, outside of said housing and in the proximity of the exit end of said exit orifice, in a location such that said yarn guide does not cross the centre-line of said exit orifice, said guide surface of said yarn guide facing a yarn outlet end surface of said housing, the position of said yarn guide being adjustable in the direction substantially perpendicular to the flow direction of said blown gas.

2. An apparatus according to Claim 1, wherein said yarn guide is of substantially rectangular cross-section or has the shape of a pin having a circular cross-section.

3. An apparatus according to Claim 2, wherein one end of said yarn guide facing the flow of said blown gas has a tapered surface forming part of said guide surface.

4. An apparatus according to Claim 3, wherein said tapered surface is a plane surface and the angle between said plane surface and a surface parallel to the yarn outlet end surface is from 0" to 60o.

5. An apparatus according to Claim 3 or Claim 4 wherein the tapered surface forms a channel in the guide surface of the yarn guide of substantially rectangular cross section.

6. An apparatus according to Claim 3, wherein said tapered surface is a peripherally extending channel intermediate the ends of the pin.

7. An apparatus according to any preceding Claim, wherein said yarn guide is movable to a standby position.

8. A yarn texturing apparatus as claimed in Claim I substantially as herein described with reference to Figures 11 to 13 as considered in conjunction with Figures 1 to 10 of the accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. whereby a multi-filament yarn is subjected to the turbulence of the pressurized gas in the turbulence section and, thereafter, is blown out of the exit orifice together with the pressurized gas, the apparatus comprising: a yarn guide for separating said blown filament yarn from said blown gas while guiding said yarn along a guide surface of said yarn guide in a direction substantially perpendicular to the flow direction of said blown gas immediately after the yarn outlet, said yarn guide being provided, outside of said housing and in the proximity of the exit end of said exit orifice, in a location such that said yarn guide does not cross the center-line of said exit orifice, said guide surface of said yarn guide facing a yarn outlet end surface of said housing and one end of said yarn guide facing the flow of said blown gas at a distance of 0 to 8 mm from the periphery of said exit orifice. WHAT WE CLAIM IS:

1. A yarn texturing apparatus for producing a multifilament yarn containing complex interfilament entanglement comprising a housing having inlet and outlet ends connected by a yarn passage, a gas turbulence section in the yarn passage, an exit orifice constituting the yarn outlet and communicating with the turbulence section, and means for introducing pressurized gas into the yarn passage, whereby a multifilament yarn is subjected to the turbulence of the pressurized gas in the turbulence section and, thereafter, is blown out of the exit orifice together with the pressurized gas, the apparatus comprising: a yarn guide for separating said blown filament yarn from said blown gas while guiding said yarn along a guide surface of said yarn guide in a direction substantially perpendicular to the flow direction of said blown gas immediately after the yarn outlet, said yarn guide being provided, outside of said housing and in the proximity of the exit end of said exit orifice, in a location such that said yarn guide does not cross the centre-line of said exit orifice, said guide surface of said yarn guide facing a yarn outlet end surface of said housing, the position of said yarn guide being adjustable in the direction substantially perpendicular to the flow direction of said blown gas.

2. An apparatus according to Claim 1, wherein said yarn guide is of substantially rectangular cross-section or has the shape of a pin having a circular cross-section.

3. An apparatus according to Claim 2, wherein one end of said yarn guide facing the flow of said blown gas has a tapered surface forming part of said guide surface.

4. An apparatus according to Claim 3, wherein said tapered surface is a plane surface and the angle between said plane surface and a surface parallel to the yarn outlet end surface is from 0" to 60o.

5. An apparatus according to Claim 3 or Claim 4 wherein the tapered surface forms a channel in the guide surface of the yarn guide of substantially rectangular cross section.

6. An apparatus according to Claim 3, wherein said tapered surface is a peripherally extending channel intermediate the ends of the pin.

7. An apparatus according to any preceding Claim, wherein said yarn guide is movable to a standby position.

8. A yarn texturing apparatus as claimed in Claim I substantially as herein described with reference to Figures 11 to 13 as considered in conjunction with Figures 1 to 10 of the accompanying drawings.