JPH0612484U - Spinning equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the occurrence of fiber loss while maintaining a strong fiber swirling force in a spinning device in which fibers are supplied from around a guide member and twisted by a swirling airflow. [Structure] Open around the edge of the step or on the surface of the step,
A nozzle block 2 in which nozzles 3b and 3a for causing a swirling air flow to act on a fiber bundle exiting the draft device are alternately arranged, a hollow or rotating spindle 6, and a guide member 5 projecting its tip toward its inlet 6a. It is a chicken.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for producing a spun yarn by twisting an untwisted short fiber bundle drafted by a drafting device by causing a swirling air flow to twist the bundle.

[0002]

[Prior art]

 The applicant has a nozzle block that has a nozzle that causes a swirl air flow to act on the fiber bundle that exits the draft device, a hollow spindle, and a guide member that projects toward the inlet with its tip. We proposed a device for manufacturing spun yarn by twisting untwisted short fiber bundles and filed a separate application.

[0003]

[Problems to be solved by the device]

 In the above spinning device, all the nozzles are opened around the edge of the step portion of the nozzle block, and air is ejected with a strong swirling force, but there is a drawback that a lot of loss fiber is generated.

The present invention aims to reduce the occurrence of fiber loss while maintaining a strong fiber turning force in a spinning device in which fibers are supplied from around a guide member and twisted by a turning air flow.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the spinning device of the present invention has nozzles that are opened around the edge of the step portion or in the surface of the step portion and that cause a swirling air flow to act on the fiber bundle exiting the draft device. And a hollow spindle that rotates or stands still, and a guide member that projects its tip toward its inlet.

[0006]

[Work]

 In the spinning device configured as described above, the fiber bundle exiting the draft device is drawn into the device by the action of the air flow ejected from the nozzle, and the front ends of all the fibers of the fiber bundle are around the guide member. Then, the fiber bundle is drawn into the yarn and guided into the spindle. The rear end side of the fiber is reversed from the spindle inlet and separated into each fiber. The separated fibers at the rear end are exposed to the swirling airflow ejected from the nozzle, and as the yarn travels, they are spirally wrapped around the fiber bundle that is being formed into yarn and become spun yarn with a real twist. .

[0007]

【Example】

 The spinning device of the present invention will be described with reference to FIGS. 1 to 4.

This spinning device generally includes a nozzle block 2 having a nozzle 3 (two types of nozzles 3 a and 3 b, which will be described later, are collectively referred to as reference numeral 3) disposed inside a casing 1 following a draft device. , A guide member support 4 having a guide member 5 located at the inlet thereof, and a rotary spindle 6 inserted into the casing 1 on the inlet side.

A fiber bundle passage 7 is formed through the center of the spindle 6, the outer diameter of the inlet 6a is sufficiently small, and the portion following the inlet 6a is a conical portion whose outer diameter increases toward the downstream side. 6b.

A portion of the nozzle block 2 that covers the vicinity of the spindle inlet 6 a is a hollow cylindrical chamber 8 having a small diameter along its outer shape, and the upstream side thereof is slightly smaller than the tip diameter of the spindle 6 by the nozzle block 2. It has a large-diameter cylindrical shape. In the portion following the hollow chamber 8, an annular hollow chamber 9 formed in the lower casing 1a and a tangential air escape hole 10 following it are formed.

Inside the upper casing 1 b, a hollow air reservoir 11 is formed between the upper casing 1 b and the nozzle block 2. The nozzle block 2 has two types of air injection nozzles, each of which communicates with the air reservoir 11 and faces downstream slightly away from the inlet 6a of the spindle 6 and is tangential to the hollow chamber 8. 3a and 3b are formed, and a hose (not shown) is connected to the air reservoir 11 via a hole 12. The direction of the nozzle 3 is set to be the same as the rotating direction of the spindle 6.

The compressed air supplied from the hose, after flowing into the air reservoir 11, is jetted from the nozzle 3 into the hollow space 8 to generate a high-speed swirling airflow in the vicinity of the spindle inlet 6a. After swirling inside the hollow chamber 8, this air flow diffuses outward while swirling gently inside the hollow chamber 9, is guided to the escape hole 10 and is discharged. At the same time, this air flow generates a suction air flow that flows from the nip point of the front roller into the hollow portion of the casing 1.

As shown in FIG. 2, the two types of air injection nozzles 3 a and 3 b have different opening positions in the nozzle block 2, and the nozzle 3 b is centered on the edge 2 a of the nozzle block step portion as in the conventional one. The nozzle 3a is open on the surface 2b of the nozzle block step portion. The nozzles 3a and 3b are arranged alternately as shown in FIG.

The relationship between the swirling flow and the advancing flow in the nozzles 3a and 3b of each type is as shown in FIG. That is, comparing the two nozzles, the nozzle 3a has a low advancing flow but a high swirling flow. Therefore, when only the nozzle 3a is arranged, the fiber loss is small, but the yarn is not tight and the required strength cannot be obtained. On the other hand, the nozzle 3b has a low swirling flow but a high traveling flow. Therefore, when only the nozzle 3b is arranged, fiber loss of 5% occurs, which is relatively large. However, the tightness of the thread is good. By arranging the two types of nozzles 3a and 3b having different opening positions in the nozzle block 2 alternately, the advantages of both can be synergistically combined. That is, generation of fiber loss can be reduced to 2% or less, and a strong and tight yarn can be spun.

The guide member support 4 has a cap shape having a fiber bundle introduction hole 13 in the upper part deviated from the center, and a pin-shaped guide member 5 is fixed to the center of the upper part.

The guide member 5 projects from the center of the upper portion of the guide member support 4 and has a free end, which faces the inlet 6 a of the spindle 6.

The spindle drive section is supported inside the bearing casing 14 by an air bearing and driven by an air turbine.

In the air bearing, a cylindrical bush 17 having an air ejection hole 17b is fitted in the bearing casing 14 following the air reservoir 17a, and the bearing casing 14 also has a compressed air supply hole 14c communicating with the air reservoir 17a. Is provided. Reference numeral 18 denotes a cap of the bearing casing 14.

In this air bearing, when compressed air is supplied from a hose (not shown) connected to the compressed air supply hole 14c, the compressed air passes through the air reservoir 17a and the air ejection hole 17b, and the spindle 6 and the bush. The spindle 6 is discharged through a slight gap with the bush 17 and comes into a non-contact state with the bush 17.

In the air turbine, a cylindrical bush 16 having a compressed air supply hole 16a and an air discharge hole 16b that are tangentially opened in the bearing casing 14 is fitted, and the bearing casing 14 also has a compressed air supply hole 16a or a compressed air supply hole 16a. A compressed air supply hole 14a or an air discharge hole 14b communicating with the air discharge hole 16b is provided, while a plurality of halves for receiving jet air flows on the outer peripheral surface of the spindle 6 corresponding to the opening of the compressed air supply hole 16a. The circular recess 6c is formed.

In this air turbine, when compressed air is supplied from a hose (not shown) connected to the compressed air supply hole 14a, the compressed air passes through the compressed air supply hole 16a and hits the recess 6c of the spindle 6 to Rotate 6. The airflow that rotates the spindle 6 is discharged through the air discharge holes 16b and 14b.

The spindle 6 assists in twisting the yarn, and can be manufactured depending on the yarn even if the spindle does not rotate. Therefore, the spindle 6 does not necessarily have to rotate.

In the spinning device configured as described above, the fiber bundle that has exited the draft device is drawn into the device by the action of the air flow that is ejected from the nozzle 3, and the front ends of all the fibers of the fiber bundle are From around the guide member 5, the fiber bundle being formed into a yarn is drawn and guided into the rotating spindle 6. On the rear end side of the fibers, the axial component force of the air flow ejected from the nozzle 3 acts to reverse the fibers from the spindle inlet 6a and separate the fibers. The separated fibers at the rear end are exposed to the swirling airflow ejected from the nozzle 3, and as the yarn travels, the fibers are spirally wound around the fiber bundle that is being formed into a yarn, and are spun into a real twist. It becomes a thread.

[0024]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

That is, it is possible to manufacture a yarn that has an extremely large amount of wound fiber and is comparable to the ring yarn in terms of appearance and tenacity, and of course the nozzle that opens around the edge of the step and the surface of the step Since the nozzles that open are alternately arranged in the nozzle block, it is possible to reduce the occurrence of fiber loss while maintaining a strong fiber turning force.

[Brief description of drawings]

FIG. 1 is a sectional view of a spinning device of the present invention.

FIG. 2 is a sectional view of a nozzle block of the spinning device of the present invention.

FIG. 3 is a diagram of a nozzle block viewed in the direction of the arrow in FIG.

FIG. 4 is a diagram showing a relationship between swirl flow and advancing flow in each type of nozzle.

[Explanation of symbols]

 2 Nozzle block 2a Step edge 2b Step surface 3 Nozzle 5 Guide member 6 Spindle 6a Spindle inlet

Claims (1)

[Scope of utility model registration request] 1. A nozzle block, which is opened around the edge of the step portion or in the surface of the step portion, and in which nozzles that act a swirling air flow on the fiber bundle exiting the draft device are alternately arranged, and a hollow that rotates or stands still. A spinning device comprising a spindle and a guide member protruding toward the inlet of the spindle.