JPH0910659A - Oily agent imparting guide - Google Patents

Abstract

PURPOSE: To provide an oily agent imparting guide capable of stably and uniformly imparting an oily agent to running yarn and capable of considerably suppressing the breaking of filaments. CONSTITUTION: The yarn contact part C of an oily agent imparting guide with a V-shaped yarn bundling groove C applied to a process for spinning synthetic fibers is made flat so as to bring running yarn Y into contact with the contact part C in a film shape and to uniformly impart an oily agent. A funnel-shaped notch N is made on the upper stream side of an oily agent discharge hole 2 made in a yarn noncontact part on the upper stream side of the yarn contact part C and the breaking of filaments by the contact of the yarn on the upper stream side of the hole 2 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a synthetic fiber yarn spinning step, in which an oil agent is applied to a multifilament yarn that continuously runs in a non-focused state after being discharged from a spinneret. The present invention relates to an oil agent application guide for applying a fixed amount of oil agent to this running yarn while focusing the yarn.

[0002]

2. Description of the Related Art In producing thermoplastic synthetic fibers such as nylon and polyester, it is common practice to apply an oil agent to running yarns. The application of this oil agent improves the binding property, smoothness, antistatic property, etc. of the yarn, and enables stable production during spinning / drawing, and further for processing such as weaving, knitting, and dyeing. It is extremely important to improve product quality and prevent troubles from occurring.

Generally, in order to apply an oil agent to a running yarn, a device for applying an oil agent to a yarn by rotating a roller having an oil film formed on its surface and bringing the running yarn into contact with the oil film is used. ing. Further, in recent years, in order to stably perform yarn production at high speed, a certain amount of oil agent is supplied to various oil agent application guides having special shapes that reduce running frictional resistance with the thread, and Oil agent application guides that apply oil agents are widely used.

As such an oil agent application guide, for example, Japanese Utility Model Publication No. 7-7330 proposes an oil agent application guide in which a V-shaped groove is formed in a convex shape along the yarn running direction.

However, in the guide, since the contact portion of the running yarn is formed by the V-shaped groove, the filaments forming the running yarn overlap each other at the bottom of the groove in a dump-like shape, and as a result, the oil agent is applied. There is a problem that unevenness of adhesion of the oil agent occurs between the filament on the contact side and the filament on the non-contact side of the guide.

Further, in the above-mentioned oil agent application guide,
A V-shaped groove is formed on the guide body in a convex shape along the yarn running direction, and an oil agent discharge hole for quantitatively supplying the oil agent is provided upstream of the thread contact portion at the bottom of the V-shaped groove. However, since the V-shaped groove formed in a convex shape along the yarn running direction is formed on the upstream side of the discharge hole as well, the width thereof is narrow, and therefore the yarn is formed in this portion. It has a problem that it is easy to come into contact with.

That is, the spun multifilament yarn is cooled by blowing cooling air under the spinneret, and at this time, the yarn sways due to the influence of the cooling air. The yarn sway often causes the unfocused yarn to come into contact with the side wall portion of the V-shaped groove of the oil application guide that is located upstream of the position where the oil solution discharge hole is formed. When the yarns come into contact with each other in such a place, the yarn contact surface is on the upstream side of the oil agent discharge hole, so that an oil film is not formed by the oil agent, and thus the contact friction coefficient (running resistance of the thread). Has a problem that it becomes very large as compared with the case where an oil film is formed, which causes filament breakage.

The above-mentioned problems are caused by an increase in spinning speed,
As the number of denier yarns and the number of filaments increase, the problem becomes remarkable, and an oil agent application guide that can solve these problems has been strongly desired.

[0009]

In view of the above-mentioned problems, an object of the present invention is to provide a multifilament yarn running at high speed with a stable and uniform oil agent in the synthetic fiber spinning process. Moreover, it is an object of the present invention to provide an oil agent application guide capable of significantly reducing the occurrence of filament breakage.

[0010]

According to the present invention, in order to bundle an unfocused multifilament yarn which is melt-spun and travels from the upper side to the lower side, along the traveling direction of the yarn. A V-shaped converging groove engraved in a convex shape is formed, and an oil agent discharge hole for quantitatively supplying the oil agent is formed in the focusing groove, and the running yarn is pressed into contact with the oil agent reservoir formed in the focusing groove. In the oil agent applying guide for applying the oil agent to the running yarn by doing so, the width direction length thereof is 0.5 mm or more and 1.5 m at the yarn contact portion of the bottom of the V-shaped focusing groove.
A flat portion is provided for flattening and widening the running yarn having a length of m or less, and 1 from the upper end of the yarn contacting portion at the bottom of the focusing groove.
mm or more and 6 mm or less, an oil agent discharge hole for supplying an oil agent to the yarn non-contact portion on the upstream side is bored in the bottom of the focusing groove, and the yarn running on the upstream side of the oil agent discharge hole is swayed. There is provided an oil agent applying guide, characterized in that a funnel-shaped notch is provided in the side wall of the focusing groove so as not to contact the side wall of the focusing groove.

[0011]

The oil application guide of the present invention can solve the above-mentioned various problems by the following operations as compared with the conventional guide.

That is, first of all, in the oil agent applying guide of the present invention, the yarn contact portion at the bottom of the focusing groove is flat over a width of 0.5 to 1.5 mm. For this reason, in the conventional V-shaped groove formed in a convex shape, the non-focused multifilament yarns are overlapped in a dumpling shape, but they are contact-widened in the form of a film, which causes an oil agent to the running yarns. It is evenly applied.

Next, the side wall of the focusing groove is cut out on the upstream side of the oil agent discharge hole formed in the bottom of the focusing groove so that the traveling yarn does not come into contact with the side wall of the focusing groove due to yarn swing. Therefore, unlike the conventional oil agent application guide, the yarn does not come into contact with the wall surface on which the oil film is not formed, whereby the filament breakage can be significantly reduced and the spinning process can be stabilized. . Further, since the generation of fluff due to filament breakage can be significantly suppressed, the quality of the obtained yarn can be improved.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view exemplifying the oil agent application guide of the present invention, FIG. 2 is a plan view, and FIG. 3 is a side sectional view taken along line XX of FIG.

In the drawing, Y is a running yarn made of multifilament, 1 is an oil agent application guide body, 2 is an oil agent discharge hole, and 3 is an oil agent supply hole. Here, the oil agent supplied in a fixed amount from a metering pump (not shown) is passed through an oil agent supply hole (3) formed in the oil agent guide body (1),
It is supplied to the oil solution discharge hole (2) to form an oil solution pool,
The oil agent is applied to the yarn by the yarn (Y) running through the oil reservoir.

In the oil agent application guide to which the oil agent is supplied as described above, in order to focus the unfocused multi-filament thread (Y) which is melt-spun and travels from the upper side to the lower side, the traveling direction of the thread A V-shaped focusing groove (G) is formed in the oil agent application guide main body (1) in a convex shape.

Further, the yarn contact portion (C) at the bottom of the V-shaped focusing groove (G) has a widthwise length of 0.5 mm or more,
A flat portion (F) for flattening and widening the running yarn (Y) having a length of 1.5 mm or less is provided. Further, the focusing groove (G) is further provided upstream of the V-shaped focusing groove (G).
1 mm or more, 6 m from the upper end of the yarn contact part (C) at the bottom of the
An oil agent discharge hole (2) is bored at the bottom of the focusing groove (G) at the upstream yarn non-contact portion of m or less.

By forming the oil agent discharge hole (2) at such a position, an oil film is preliminarily formed on the guide wall with which the yarn (Y) comes into contact, whereby the yarn (Y) and the guide wall. The coefficient of contact friction between and can be reduced, and the running resistance of the yarn (Y) can be significantly reduced. Here, the perforation position of the oil agent discharge hole (2) for supplying the oil agent for applying the oil agent to the traveling yarn (Y) while forming the oil film at the contact portion (C) of the yarn is set to the focusing groove (G). The meaning of setting the upstream side of 1 mm or more and 6 mm or less from the upper end of the yarn contacting portion (C) at the bottom of is described below.

If the drilling position of the oil agent discharge hole (2) is less than 1 mm, the yarn (Y) is guided by the guide body (1).
The low-boiling substances that have adhered to the yarn (Y) fall off due to the abrasion with the thread (Y), and the oil agent discharge hole (2) is likely to be clogged.
In addition, the pulsation of the fixed amount supply pump (not shown) may propagate to the supplied oil agent, and in order to mitigate this effect, an oil agent reservoir is formed at a certain distance, and the pulsation effect Need to be reduced.

However, if this distance exceeds 6 mm, an appropriate oil agent reservoir is not formed, and the oil agent is unevenly distributed due to the influence of the air flow accompanying the running yarn, making it difficult to uniformly apply the oil agent.

Next, in the yarn contact portion (C) at the bottom of the V-shaped converging groove (G), a running yarn having a widthwise length of 0.5 mm or more and 1.5 mm or less is flattened. A flat portion (F) is provided in the contact area to widen the contact, which means as follows.

That is, if the length in the width direction is smaller than 0.5 mm, the contact widening effect of the traveling yarns (Y) described above cannot be expected so much, and the multifilament yarns (Y) overlap each other in a dumpling shape. It is difficult to apply a uniform oil agent. Conversely, 1.5m
When it exceeds m, the oil agent reservoir is not well formed, and the oil agent adheres unevenly, and further, the problem that the oil agent is unevenly distributed and flows due to the air current accompanying the traveling yarn is apt to occur.

Finally, in the present invention, on the upstream side of the oil agent discharge hole (2), the traveling yarn (Y) is caused by the yarn shaking.
It is essential to provide a funnel-shaped notch (N) in the side wall of the focusing groove (G) so as not to contact the side wall of the focusing groove (G). The reason is that the yarn (Y) is constantly wobbling under the influence of the cooling air for cooling the spun yarn, and due to this influence, the oil film on the upstream side of the oil agent discharge hole (2). This is because it is necessary to avoid the yarn from coming into contact with the wall surface on which the thread is not formed. If the yarn comes into contact with the wall surface on which the oil film is not formed, the contact friction coefficient of this portion is large, and the yarn is damaged by rubbing, which causes filament breakage. For this reason, stable spinning is impaired, and the quality of the yarn obtained due to generation of fluff deteriorates.

Therefore, on the upstream side of the oil agent discharge hole (2), it is important to cut out the side wall of the focusing groove (G) so that the traveling yarn (Y) does not come into contact with the side wall of the focusing groove (G) due to yarn sway. .

The "notch (N)" is shown in FIG.
The notch angle (θ) is 100
It is desirable to set the angle to 180 °. Within such a range, even if the yarn shakes, contact with the side wall of the focusing groove (G) is extremely unlikely to occur, which is preferable. Also,
It is preferable that the notch (N) has such a notch depth that it reaches at least the bottom of the focusing groove.

Here, in this embodiment, FIG. 1 and FIG.
In addition to the oil agent collecting portion represented by the symbol R shown in FIG. 5, the oil agent collecting portion (R) is formed following the yarn contact portion (C) of the focusing groove (G), and the yarn yarn (Y) is formed. ) Is provided so that the residual oil agent applied to () can be transmitted therethrough and collected in an oil agent receiver (not shown).

[0028]

As described above, according to the present invention,
Since the oil agent is applied while focusing the yarn (Y) running in the unfocused state in the focusing groove (G) having the flat portion (F) at its bottom, the multifilament yarn can be contact-widened in a film shape. it can. Further, the yarn does not come into contact with the guide wall on which the oil film is not formed.

By the above-mentioned action, the running yarn can be stably and uniformly applied with the oil agent, and the filament breakage is eliminated, so that the spinning process is stabilized and the quality of the obtained yarn is improved. Has a very remarkable effect on.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an oil agent application guide of the present invention.

FIG. 2 is a plan view illustrating an oil agent application guide of the present invention.

FIG. 3 is a side sectional view taken along line XX in FIG.

[Explanation of symbols]

 1 Lubricant application guide body 2 Lubricant discharge hole 3 Lubricant supply hole C Thread contact portion F Flat portion G V-shaped focusing groove N Notch Y Travel yarn

Claims (1)

[Claims] 1. In order to bundle a non-concentrated multifilament yarn (Y) which is melt-spun and travels from the upper side to the lower side, a V-shaped convex shape is formed along the traveling direction of the yarn. A focusing groove (G) is formed, and an oil agent discharge hole (2) for quantitatively supplying the oil agent to the focusing groove (G) is bored, and a running yarn (2) is provided in an oil agent reservoir formed in the focusing groove (G). In the oil agent application guide (1) for applying the oil agent to the traveling yarn (Y) by pressing and contacting Y), the width direction length of the yarn contact portion (C) at the bottom of the V-shaped focusing groove is A flat portion (F) is provided for flattening and widening the running yarn (Y) having a length of 0.5 mm or more and 1.5 mm or less, and 1 mm from the upper end of the yarn contacting portion (C) at the bottom of the focusing groove. As described above, the oil agent discharge hole (2) for supplying the oil agent to the upstream yarn non-contact portion of 6 mm or less is provided with the focusing groove. Drilled in the bottom of G),
In addition, a funnel-shaped notch (N) is provided on the side wall upstream of the oil agent discharge hole (2) so that the traveling yarn (Y) does not come into contact with the side wall of the focusing groove (G) due to yarn wobbling. An oil agent application guide characterized in that