JPS602189Y2 - pneumatic spinning nozzle - Google Patents

Description

[Detailed description of the invention] This invention relates to the structure of the first nozzle of a pneumatic spinning nozzle.

In a pneumatic spinning nozzle, it is desirable that the air ejected from the ejection port be ejected toward the discharge port with as little resistance as possible, and by doing so, it is possible to spin high-quality yarn with a good twist state.

However, in the type in which a diaphragm is provided at the rear of the nozzle, the ejection resistance tends to be too high due to the complicated structure, resulting in light rotation that makes it difficult to obtain a good spinning condition.

The aperture is for controlling the balloon of yarn generated by the air from the nozzle, and has a groove formed around a hole that communicates with the nozzle hole to allow air to escape.

Therefore, this invention was made based on the above knowledge, and it is possible to minimize the ejection resistance and spin yarn with a good twist even when the aperture is provided after the first nozzle. The purpose is to

Next, the embodiment will be explained with reference to the drawings. Reference numeral 3 denotes a nozzle housing, and inside the housing 3 there is a first nozzle 1 on the front side,
A second nozzle 2 is installed on the rear side, and the first nozzle 1
In this embodiment, it is fitted together with the aperture 4 into a recess formed at the front of the housing 3, and is fixed to the housing 3 by screwing a cap 6 onto a threaded portion 5 formed at the tip of the housing 3. It has become.

Into the nozzle hole 7 of the first nozzle 1 is an introduction passage 8 formed in the housing 3, an air pressure chamber 10 formed by the gap between the cap 6 and the housing 3, and a passage through the main body of the first nozzle 1. Air is introduced and ejected through the provided ejection hole 11, and the ejected air moves backward while swirling inside the nozzle hole 7, and passes through the aperture hole 12 formed in the aperture 4 and the aperture. The air is discharged to the rear air relief notch 14 through the air relief groove 13 formed in the hole 12 in a radial manner. The inner diameter of the nozzle hole 7 on the rear side of the nozzle hole 11 is formed into a tapered shape 15 that widens particularly toward the rear, and the inner diameter d1 of the rear end of the nozzle hole 7 is the aperture formed in the aperture 4. It is larger than the inner diameter d2 of the hole 12 and smaller than the diameter d3 of the virtual circle connecting the bottoms of the air relief grooves 13.

Reference numeral 16 denotes an O-ring that maintains airtightness between the first nozzle 1 and the housing 3, and 17 an O-ring that also maintains airtightness between the first nozzle 1 and the cap.

In the pneumatic spinning nozzle of this invention, the nozzle hole of the first nozzle is particularly configured as described above, so that the air ejected from the jet hole 11 into the nozzle hole 7 flows through the nozzle hole 7.
While rotating inside the nozzle, it spreads along the tapered part 15 and moves in the direction of the aperture 4, and when moving from the nozzle 1 to the aperture 4, it smoothly enters the aperture 4 without experiencing any sudden changes in the passage diameter. The air ejects and moves, and is diffused and released from the air relief notch 14.

Without the tapered portion, air would be ejected into the center of the throttle hole 12 and would be resisted by the shape of the hole 12, but in the spinning nozzle of the present invention, the tapered portion allows air to flow into the air relief groove 13. It is guided smoothly and discharged through the entire throttle hole 12.

Therefore, the air ejected from the ejection hole 11 is ejected to the air release notch 14 with extremely little resistance, so that even if the pneumatic spinning nozzle according to this invention has a complicated structure, It is possible to spin high-quality yarn with good twist.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an embodiment of the pneumatic spinning nozzle of this invention, Fig. 2 is an enlarged sectional view of the main part, and Fig. 3 is a diaphragm indicated by a dashed line along m-■ in Fig. 2. It is a line arrow view. 1...First nozzle, 4...Aperture, 7.
...Nozzle hole, 12...Aperture hole, 13.
...Air relief groove, 15aaama* taper shape.

Claims (1)

[Scope of utility model registration request] In a pneumatic spinning nozzle in which a diaphragm is provided at the rear of the first nozzle, the rear part of the nozzle hole of the first nozzle has a tapered shape in which the inner diameter widens toward the diaphragm. A pneumatic spinning nozzle characterized by being larger than the inner diameter of the aperture hole and smaller than the bottom of an air relief groove carved in the aperture hole.