JPS6325090B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement of a fiber separation tube of a yarn forming device in a bundled spun yarn manufacturing machine.

In recent years, an extremely productive knot spinning method that uses air vortices has been developed and is being put into practical use as a production machine.

A typical tied spun yarn manufacturing machine supplies staple fiber bundles with a certain width, performs a prescribed drafting process using a drafting device, and then uses a yarn forming device consisting of a fiber separation tube and an air false twisting nozzle. A structure is used in which fiber bundles are twisted and converged to form a bound spun yarn, which is then wound on a winding device.

The fiber bundle supplied to the above-mentioned yarn forming device is sent out in a state in which, in addition to the main fiber bundle that is twisted and converged, loose fibers that are not twisted are generated. Such a false-twisted fiber bundle is untwisted to become a bundled spun yarn in which free fibers are spirally wound and bound on the surface of the substantially untwisted fiber bundle.

Therefore, in order to obtain high quality bound spun yarn in which free fibers are evenly and reliably wound, it is necessary to generate free fibers stably, and for this reason, the shape of the fiber separation tube should be changed so that the suction port is horizontally elongated. A device has been proposed in which the slit has a configuration in which both ends of the slit are larger than the center so that the newer airflow is generated mainly at both ends.

(Prior art) As a device with such a configuration, for example,
It is described in Publication No. 58-191227.

As mentioned above, if you try to make the suction port of the fiber separation tube into a horizontally long slit shape with both ends of the slit larger than the center, the fiber separation tube will be split into two and the suction will be drawn into the joint surface due to the shape. It is necessary to drill grooves to form the mouths and then combine them to form a single piece.

(Problem to be solved by the invention) However, if the fiber separation tube is simply cut in two and grooved and then assembled, the fibers will get caught in the joint due to wear and the suction port will become clogged, resulting in frequent shutdowns. I had to clean it up. Another problem was that if the joints were worn out, the entire joints had to be replaced.

The present invention was obtained as a result of studies aimed at solving the above-mentioned problems and providing a fiber separation tube for a yarn forming device that is easy to assemble and disassemble and does not trap fibers even if the inlet part is worn. It is something that

(Means for Solving the Problems) That is, the present invention is to form a groove for forming an inlet on the joint surface of two substantially semi-cylindrical bodies, and to combine the substantially semi-cylindrical bodies to form a cylindrical body. , a fiber separation tube is provided in which a wear-resistant guide plate having a hole substantially the same shape as the suction port is fixed to the fiber inlet side of the cylindrical body and assembled into an integral body.

Here, in the fiber separation tube, the recesses forming the suction port and the negative pressure chamber are formed in one member, but they may be formed in separate members and connected. Further, in order to accurately combine the two halves of the semi-cylindrical body, a pin may be provided protruding from one side and a hole may be bored from the other side, or irregularities may be formed on the joint surface. The shape of the suction port is appropriately set depending on the material and thickness of the fibers, the form of the required bound spun yarn, etc.

As long as the guide plate has excellent abrasion resistance, the hole formed therein should have approximately the same shape and size as the suction port, or be smaller than the suction port.

(Example) A schematic cross section of a yarn forming device equipped with the fiber separation tube of the present invention is shown in FIG. 1, and a Z cross section in FIG. 1 is shown in FIG.
FIG. 3 shows an exploded perspective view of the fiber separation tube of the present invention, and its structure will be explained.

The yarn forming device is composed of a fiber separation tube 2 and a holder 3 which are detachably attached to a holding member 1, and a false twisting nozzle 4 which is detachably attached to the holder 3.

The holding member 1 has a hole 1a for mounting the fiber separation tube 2 and the hodder 3, and holes 1b and 1c to which the negative pressure pipe 10 and the compressed air supply pipe 11 are connected, respectively.

The fiber separation tube 2 is formed of a substantially semi-cylindrical body 2-1 having a protruding pin 9, a substantially semi-cylindrical body 2-2 having a hole for fitting the pin 9, and a guide plate 8, Grooves 2-1a, 2-2a forming an inlet 2a and recesses 2-1d, 2-2d forming a negative pressure chamber are bored in the joint surfaces 2-1b, 2-2b of the semi-cylindrical body, respectively. There is. Moreover, grooves 2-1c and 2-2c for mounting the O-ring 5 are formed on the outer periphery thereof. When the semi-cylindrical bodies 2-1 and 2-2 are combined, a wear-resistant guide plate 8 having a hole 8a having approximately the same shape as the suction port 2a of the fiber separation tube 2 is provided on the fiber entry side.
to fix.

The holder 3 has a hole 3a for mounting the false twisting nozzle 4, and a hole 3 for communicating the hole 3a with the hole 1c of the holding member 1 to which the compressed air supply pipe 11 is connected.
b is drilled. Further, a groove 3c for mounting the O-ring 6 and a recess 3d for forming a pressure chamber are formed on the outer circumference thereof.

The false twisting nozzle 4 is provided with a plurality of holes 4a for passing the fibers and a plurality of pores 4b for ejecting compressed air into the holes 4a. Further, a groove 4c for mounting the O-ring 7 and a recess 4d for forming a pressure chamber are formed on the outer circumference thereof.

The above-mentioned thread forming device has two approximately semi-cylindrical bodies 2-
1 and 2-2 are combined, a guide plate 8 is attached with adhesive to form a fiber separation tube 2, and an O-ring 5 is attached to the groove of the fiber separation tube 2. Next, attach the O-ring 7 to the false twist nozzle 4, and the O-ring 6 to the holder 3.
It can be assembled by attaching the false twisting nozzle 4 to the holder 3, and attaching the holder 3 and the fiber separation tube 2 to the holding member 1 in a connected state.

The yarn forming device is attached to a predetermined position of the bound spun yarn manufacturing machine, and is connected to the negative pressure piping 10 and the compressed air supply piping 11.

If a problem occurs with the fiber separation tube 2 or the false twisting nozzle 4, etc., press it from the guide plate side of the fiber separation tube 2, take out the holder 3 and fiber separation tube 2 from the holding member 1 at the same time, and prepare them separately. exchange for something.

(Effects of the Invention) As described above, the fiber separation tube of the present invention has grooves for forming suction ports formed in the joint surfaces of two substantially semi-cylindrical bodies, and the substantially semi-cylindrical bodies are combined to form a circular cylinder. The following effects can be achieved by assembling the cylindrical body into an integral body by fixing a wear-resistant guide plate having a hole of approximately the same shape as the suction port on the fiber inlet side of the cylindrical body.

(1) Since the fiber separation tube is formed by two approximately semi-cylindrical bodies and a wear-resistant guide, fibers will not get caught in the inlet of the inlet of the cylinders, and if the holes in the guide plate are worn out. However, the cylindrical body having the suction port can be used as is by simply replacing only the guide plate.

(2) The cylindrical body with the suction port can be made of a material that is easy to process.

(3) Since the cylindrical fiber separation tube and the false twisting nozzle are attached to the holding member, processing becomes easier and the compatibility of each part is improved. Moreover, the attachment/detachment operation becomes easier.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing one embodiment of a yarn forming device equipped with a fiber separation tube of the present invention. FIG. 2 is a Z cross-sectional view in FIG. 1. FIG. 3 is an exploded perspective view of the fiber separation tube of the present invention. 1: Holding member, 2: Fiber separation tube, 3: Holder, 4: False twist nozzle, 5, 6, 7: O ring,
8: Guide plate, 9: Pin, 2-1, 2-2: Semi-cylindrical body, 2a: Inlet.

Claims (1)

[Claims] 1. A groove for forming an inlet is formed in the joint surface of two approximately semi-cylindrical bodies, and the approximately semi-cylindrical bodies are combined to form a cylindrical body, and a groove approximately the same as the inlet is formed on the fiber inlet side of the cylindrical body. A fiber separation tube characterized in that it is assembled into a single piece by fixing a wear-resistant guide plate with a shaped hole.