JPH03104933A - Preparation of sliver - Google Patents

Abstract

PURPOSE:To stably prepare the subject spun yarn having a sufficient and arbitrary amount of fuzz-like separated fibers and having a strong binding degree by blowing a vertical air flow on a fiber bundle and subsequently blowing a revolving air flow for twisting on the pre-blown fiber bundle. CONSTITUTION:Before a fiber bundle is blown with a rotation air flow for twisting the fiber by an air force style false spinning method, a vertical air flow is blown on the fiber bundle to provide the objective fiber bundle. The air flow is preferably blown on the wide fiber bundle surface formed by preliminarily flattening the fiber bundle.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a method for producing binding yarn by an air-forced false twist spinning method.

(Prior art 1) When producing a binding yarn by the well-known aerodynamic false twist spinning method in which a swirling air flow surrounding the fiber bundle is blown onto the fiber bundle to perform twisting, single fibers protruding from the fiber bundle in a fluff-like manner. Since the protruding portion of the fiber bundle is wrapped around the fiber bundle to form a binding, the ta fiber bundle processed in the force I1 twist region requires the presence of an appropriate amount of fluff.

Conventionally, the fluff necessary for producing the above-mentioned binding yarn is ballooned after the fiber bundle is produced and before it is heated! Ijk fiber bundles that are naturally generated by coming into contact with rollers or guides have been used, but this is often insufficient when trying to manufacture a highly cohesive product with a large amount of wrapped fibers.

Problem to be Solved by the Invention 1 In view of the above points, the present invention adopts a means for actively separating a part of the short fibers from the 4I fiber bundle into a fluff-like form to achieve sufficient and optional maximum By producing fluff-like separation a#It, it is possible to stably produce a binding yarn with a strong degree of cohesion and having more wrapped fibers than conventional yarns.

[Means for Solving the Problems 1] The present invention provides hOt'! ! A perpendicular air stream is applied to the fiber bundle prior to the application of the swirling air stream.

The air flow perpendicular to the Pa fiber bundle preferably flattens the S fiber bundle in advance and blows against the formed wide lli fiber bundle surface.

K effect 1 In the production method of the present invention, the air flow blown perpendicularly to the fiber bundle disturbs the va#I aggregate state in the fiber bundle, and some of the single fibers that were aligned as a fiber bundle are 1l end
The fibers are separated into fluff-like pieces (hereinafter, this air flow is referred to as fiber end separation air flow). The fluff increased by this fiber end separation effect is wound around the AI fiber bundle by the subsequent circulating air flow treatment, giving a strongly bound binding yarn.

When a vertical air stream is blown against the pre-flattened s#I bundle surface, the above fiber I! The i#A separation effect becomes more pronounced.

[Example 4] Hereinafter, an example of the method of the present invention using a spinning device whose main parts are shown in the drawings will be described.

The false twisting device shown in Fig. 1 consists of a spindle 1 rotating at high speed.
By using the swirling air flow from the blow nozzle 2 in combination, the fibers S are twisted and bundled. The spindle 1 is a long and thin ceramic tube, and the protection tube 3
casing 5 by bearings 4, 4.
supported within.

The protective tube 3 is provided with a boley 6, and is rotated at high speed by being cantered by a belt 7 in contact with the boley 6. There are four spray nozzles 2, each of which opens toward a portion of the fiber east introduction pipe 8 disposed on the fiber east entrance side of the spindle 1, near the point 9 of the spindle 1, and all of them are aligned with the spindle center axis. An air stream is injected along the inner wall of the fiber east introducing pipe 8 to generate a swirling air stream around the center, and a swirling air stream 10 is generated around the pointed head 9 of the spindle 1. There is a gap 11 between the fiber east introduction pipe 8 and the pointed head 9 of the spindle 1 for passing the swirling air flow 10, which communicates with an exhaust flow path 12.

On the fiber east entrance side of the fiber east introduction pipe 8, weir plate-shaped guides 14, 15 are provided which protrude alternately from the upper and lower sides of the pipe wall 13.
There is.

The fiber bundle introduction tube 8 also has, between the opening of the blowing nozzle 2 and the guide 14, an air flow injection nozzle 16 for HH end separation, which is necessary for carrying out the invention. This nozzle 16 is perpendicularly perpendicular to the path of the fiber bundle S, that is, the central axis of the one-fiber east introducing pipe 8, and can be controlled independently of the flow path 17 connected to the air source of the spray nozzle 2. It receives a supply of pressurized air from channel 18.

In the above embodiment, the flow path 18 ejects air only from one side of the widened fiber bundle, but by providing a time difference in the progress of the fiber bundle, the air is ejected from both sides alternately toward the M&fiber bundle. They may be provided on both sides of the fiber bundle so as to

When taking out the yarn, such as when splicing yarn, if the air jet from the fiber end separation air jet nozzle 18 is used, it will be difficult to introduce Ilk ITO into the spindle 1, so stop the air jet. put. If the thread begins to flow after threading is finished,
Air jetting from the air jet nozzle 18 for separating fiber ends is started. The area fiber bundle S that has come out of the front roller of the draft device (not shown) and entered the AI ITO introduction pipe 8 is guided by the guide 1.
While passing through the fiber east passage, which is flattened in the central axis direction by the fibers 4 and 15, it is spread into a tape shape and enters the spindle 1. Before that, the S fiber end separation air F. Sword nozzle 1
A vertical air jet from the spray nozzle 2 is applied to the spread a fiber bundle surface to separate the terminal ends of the fibers constituting the fiber bundle from the fiber bundle and make it fluffy. receives a high-speed airflow swirling around S. The fiber end of Tado separated from the fiber bundle S by vertical air injection is
The fiber bundle S is wrapped by the swirling air flow from the spray nozzle 2. The amount of wrapped fibers can be adjusted by adjusting the intensity of the vertical fiber end separation air jet. In the spindle 1 which rotates at high speed, false twisting is performed before the winding of the fiber ends further progresses, and the heated fiber bundle S exits from the spindle outlet 19 and is released from the heating action, and is moved to the delivery roller (on the left side in the figure). (not shown).

Effects of the K invention 1 This Bimei is designed to blow an air stream perpendicular to the 4 & fiber bundles before blowing a swirling air stream for heating to the a fiber bundles when producing binding yarn by the pneumatic false twist spinning method. Therefore, this makes it possible to increase the number of fluff-like separated fibers wrapped around the fiber bundle as necessary to produce a binding yarn with a high degree of cohesion and a ring-spun yarn texture, which was previously difficult to manufacture. It's now possible.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a false twisting device used in an embodiment of the present invention, and FIG. 2 is a front view of a miscellaneous bundle introducing pipe portion.

Claims (1)

[Claims] 1. Manufacture of bound spun yarn characterized by blowing a perpendicular air stream onto the fiber bundle before blowing a swirling air stream for heating onto the fiber bundle when producing the bound yarn by the pneumatic false twist spinning method. Law.