JPS5943142A - Fluid treatment of yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for fluid treatment of yarn, and in particular to a method for fluid treatment of yarn, in which interlaced portions are formed partially in the yarn running direction of continuously running multi-finment yarn, which is convenient for subsequent processes. The present invention relates to a fluid processing method for obtaining yarn.

In general, untwisted multifilament yarns lack cohesiveness, so when used as warp yarns in later processes such as looms and knitting machines, the individual fibers that make up the multifilament yarns will separate. It is extremely difficult to handle as it causes thread breakage, tangles, and fabric defects. Therefore, in this case, the multifilament yarn is often used in a bundled state through a gluing process called sizing or a twisting process.

The above-mentioned glued yarn requires a process to remove the glue by washing with water after weaving, and if it is to be twisted, it requires a twisting process using a twisting machine.In either case, the number of processing steps increases and the cost is high. This may cause damage to the fibers or require a rewinding process.

These steps are omitted and a fluid jet nozzle is used to give the multifilament yarn (hereinafter referred to as a fiber bundle) a cohesive property, that is, each filament (hereinafter referred to as a single fiber) is intertwined with each other, making it untwisted. Nevertheless, it is being done to provide the same degree of convergence as twisted yarn and to suppress the spreading and separation between single fibers.

In order to obtain the fiber bundle, that is, the intermittent entangled yarn, having the above-mentioned converging portion, it is important to control the generation state of chordal vibration of the fiber bundle caused by the jet flow in the fluid injection nozzle. In order to increase the amount of entangled parts and the strength of entanglement, it is important to limit the string vibration to the inside of the fluid nozzle and prevent the influence of the string vibration from propagating to the fiber bundle outside the nozzle.

Based on the above points, the present invention provides a method for obtaining intermittent intertwined yarns in an extremely simple manner, and will be described in detail below along with an apparatus for carrying out the method of the present invention.

FIG. 1 shows a layout diagram in which a fluid treatment nozzle is arranged in a false twisting device.

The yarn (Y1) drawn out from the yarn supply package (1) by the first feed roller (2) ascends through the first heater (3) and passes through the deflection rollers (4) and (5) to the balloon control plate ( 6) After being cooled to a set temperature through a cooling device (7), it is introduced into a known false twisting unit (8) such as a bottle type, belt type, friction type, etc., where it is subjected to a false twisting action and is stretched and false twisted. After that, the second feed roller (9)
is actively delivered and introduced into the fluid treatment device (10). Yarn (Y
2) is wound up into a winding package (13) while being pulled out by a third feed roller (12), possibly through a second heater (11).

As schematically shown in Fig. 2, the yarn (Y) obtained in this way is a bulky textured yarn that has been false-twisted and crimped as a whole, with a spread part (Y3) and an intertwined part. (Y4) appear alternately, and the entangled portion (Y4) is a portion where the single fibers constituting the fiber bundle are entangled with each other due to fluid action, and have a convergence property due to entanglement, loops, etc. The greater the number per unit length, the stronger the convergence of the fiber bundle, and the more effectively the separation of fibers can be suppressed in the subsequent process.

FIGS. 3 and 4 show an embodiment of the fluid treatment device (10).

That is, this device is composed of two blocks (14) (15) and bolts (16) (16) that assemble both blocks, and one block (14) has a thread passageway (17) and a thread processing section (18). , and a fluid ejection hole (23) for ejecting fluid to the yarn processing section, the other block (15) forming a plane that closes the opening of the yarn passage (17).

5 and 6 are cross-sectional views of the fluid treatment device (10), FIG. 5 is a cross-sectional view taken along a plane perpendicular to the thread path, and FIG.
The figure shows a cross-sectional view taken along a parallel plane passing through the thread path.

That is, the yarn passage (17) is a passage with a triangular cross section surrounded by three side walls (20), (21), and (22) parallel to the yarn running direction (19), and the longitudinal direction of the passage (17) is A fluid spout (23) is opened in the center, and the opening (24)
) has spherical curved surfaces (25a) (25b) on the side walls (20
) (21).

That is, an isosceles triangle or an equilateral triangle is formed with one apex (26) of the triangular passageway (17) as the bottom, and the spherical curved surfaces (25a) and (25b) have a length (L) of one side of the triangle.
) (preferably 1.25 of L)
~2.1 times) is a spherical surface.

In addition, a part (25
c) is coplanar with one plane (22) of the triangle.

Therefore, the thread passage (17) has a triangular cross-sectional shape (
17) It consists of (17) and a spherical part (18), and the cross-sectional area of the spherical part, that is, the fluid treatment part (18) is larger than the cross-sectional area of the other triangular passage (17), and the passage (
At the entrance and exit of 17), the bottom part (26) also has the effect of a guide to regulate the thread path.

The above-mentioned fluid treatment device (10) is arranged at a position offset from the shortest thread path as shown in the first figure.

In FIG. 7, the thread passage (1) of the nozzle block (14) is shown.
7) The center is the nip point (P) of the second feed roller (9)
and the second heater (11) inlet (Q), that is, the shortest thread path (A) between the thread fixing points on both sides of the nozzle box.
Therefore, the yarn (Y5) on the entrance side is placed at a position shifted by a distance (l) from the nozzle entrance (17a) at an angle (θ1
), and the thread (Y6) on the exit side (17b) is at an angle (θ2)
The angles (θ1) and (θ2) may be the same or different.

Furthermore, fluid ejection holes (23) for the yarn passage (17) are provided on the inclined sides of the yarn on the entry and exit sides.

(27) is a main pipe for supplying compressed fluid, preferably compressed air, and compressed air is supplied from this vibrator to the air ejection holes (23) of each nozzle box via a branch vibrator (28).

Therefore, the fiber bundle (Y) is
When performing fluid treatment on the yarn passage (17) of the nozzle (10)
At the inlet and outlet ends, the fiber bundles (Y5) (Y6) are positioned and regulated by the bottoms (16a) and (16b) of the passage as shown in Figures 8 and 10, and are connected to the inlet end face (17a) and the upper fixing point (P). The fiber bundle between (Y5) and the exit side end surface (
17b) and the lower fixed point (Q), and the fiber bundle generated by the action of the ejected fluid flow in the passage (17) area of the nozzle block (14). The string vibration of (Y7) is limited to the inside of the nozzle and does not affect the fiber bundles (Y5) and (Y6) outside the nozzle.

That is, the fluid directly injected onto the fiber bundle from the fluid ejection hole (23) of the passageway (17) causes chordal vibration as shown in Figure 9 in the fluid treatment area (18), which causes the fluid to pass through the front surface of the ejection hole. Intertwined portions are intermittently formed in the fiber bundle.

As shown in Figure 2, the intermittent intertwined yarn thus obtained has intertwined portions (Y4) and spread portions (Y3) clearly appearing alternately, and can withstand practical use in terms of intertwining strength. there were.

In addition, when the experiment was conducted using another method, that is, when the thread passage (17) of the nozzle was located on the chain double-dashed line (A) in FIG.
When the yarn is run parallel to the passage (17) without giving any inclination to the yarn on the entry and exit sides, or when the yarn travel path is as shown in Figure 7, the direction of fluid jetting is opposite to the direction shown in Figure 7. When jetting in the direction, intermittent entangled threads are not obtained in any case;
The spread part existed over a long part, or the intertwined part became unclear, making it impossible to obtain the desired intermittent intertwined yarn.

In addition, in the apparatus of the above embodiment, the yarn passage of the nozzle box has a triangular cross section, but even if a nozzle with a cylindrical passage is used, the yarn path is made at an angle, and the nozzle entrance and exit ends are By regulating the yarn path and applying tension, and by providing the fluid injection holes on the inclined side of the yarn, the same effects as described above can be achieved.

As described above, in the present invention, the fiber bundles are caused to travel in bending contact with each other in the same direction on the inlet and outlet sides of the fiber bundle passage of the fluid treatment nozzle, and the fluid injected onto the fiber bundles in the nozzle passage is Since the fiber bundle is injected from the bent side, an appropriate tension is applied to the fiber bundle outside the nozzle, and the chordal vibration of the fiber bundle inside the nozzle is propagated beyond the bending contact points at both ends of the nozzle. Only the fiber bundle inside the nozzle undergoes chordal vibration due to the jetted fluid, and interlaced parts and spread parts appear alternately in the yarn running direction, and the number of interlaces per unit length and entanglement strength are sufficient to achieve the desired intermittency. I was able to obtain interlaced threads.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram of a false twisting device equipped with a fluid treatment device, Fig. 2 is a schematic diagram of yarn produced by the same device, and Fig. 3 is a schematic diagram of a yarn produced by the same device.
4 is a plan view of the nozzle block (14), FIG. 5 is a sectional side view of the fluid processing device, FIG. 6 is a front sectional view of the fluid processing device, and FIG. 7 is a sectional view of the present invention. FIG. 8 is a diagram showing the relationship between the yarn and the nozzle passage on the yarn entry side of the device; FIG. 9 is a cross-sectional view showing the behavior of the yarn in the yarn processing section; FIG. 10 is a diagram showing the relationship between the yarn and the nozzle passage on the yarn exit side of the device. (10)... Fluid treatment device (17)... Passage (17
a)...Thread entry side (17b)...Thread exit side (23)...
・Fluid injection hole (θ1) (θ2)...Inclination angle '7
1st ba/2 2nd figure 8 3rd and 4th ward 5th ward 60th

Claims (1)

[Claims] The fiber bundle is bent in the same direction on the inlet and outlet sides of the fiber bundle passage of the fluid injection nozzle and runs in contact with the fiber bundle, and the fluid to be injected to the fiber bundle in the passage of the nozzle is applied to the bent side of the fiber bundle. A fluid treatment method for yarn, characterized in that the fluid is jetted from the yarn.