JPS59216647A - Intermediate nozzle of jet loom - Google Patents

Abstract

PURPOSE:To certainly prevent a wefting mistake by uniformly imparting an auxiliary air stream to a main air stream, by a method wherein the whole of an intermediate nozzle is integrally molded by precise casting and, after a reinforcing pin is traversely provided, air jet orifices are provided to the inner peripheral edge of a ring shaped part by drilling. CONSTITUTION:Air jet orifices 15 communicated with an air passage 17 are provided by drilling to the inner peripheral edge of a ring shaped part 12 having said air passage 17 formed therein and auxiliary air streams are injected from said jet orifices 15 to the jet direction of a main air stream injected from the main nozzle of a jet loom over the entire outer periphery of said main air stream. In the intermediate nozzle 10a of said jet loom, a mold body corresponding to the air passage 17 is used as a core material 21 while the mold body corresponding to the ring shaped part 12 so as to enclose said core material is used as a wax mold 22 and an orifice communicated with the core material 21 is provided to a part of the wax mold to subject the whole to integral molding by precise casting and the core material is melted and flowed out from the above mentioned orifice to form the passage 17 while a reinforcing pin 23 is inserted through the above-mentioned orifice to respectively secure the pin 23 at both surfaces of the ring shaped part 12.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intermediate nozzle of a jet loom that provides an auxiliary air flow to the main air flow ejected from the main nozzle of the jet loom.

Conventionally, as shown in FIG. 1, a jet loom weft guide member 10 is configured by a large number of intermediate nozzles 10a, rectifying nozzles 10b, and weft guides 10c arranged linearly in the direction of the flying force of the weft. The intermediate sozzle 10a is arranged at a predetermined interval, and as shown in FIG.
2 and a support portion 13 formed at the bottom of the annular portion 12. The intermediate nozzle 10a is a tunnel type (closed type) in which an opening 14 is provided at the upper part of the annular part 12 on the warp advancing side, similar to other guide sections.
4 is for letting the weft threads escape from the annular portion 12 during beating.

The intermediate nozzle 10a has a large number (24 in this example) of air injection ports 15 formed on the inner peripheral edge of the annular portion 12 on one side.

As shown in FIG. S2 and FIG. 3, 16 is a connector that forms an air inlet of the intermediate nozzle 10a and is connected to an air tube (not shown). Further, an air passage 17 is formed inside the arm part 11 and the annular part 12 of the intermediate nozzle 10a, as shown in FIG. 1, and this air passage 17 communicates with the air injection port 15. Further, the intermediate nozzle 1°a is connected to the main body portion 1 that constitutes the side wall on the opposite side to the opening side of the air injection port 15.
8 and a cover part 19 forming a side wall on the air injection port 15 side. The main body part 18 and the cover part 19 are molded separately by precision casting or resin molded, and after the air injection port 15 is bored in the cover part 19, they are welded, caulked, or soldered together. It is attached by attaching etc.

However, in the conventional intermediate nozzle 10a, if the main body part 18 and the cover part 19 are bonded together by welding, the existing air injection l''
15 is deformed by the heat during welding, and the direction of the air flow injected from the air jet ports 15 varies from one air jet port 15 to another. As a result, turbulence is given to the weft, and the inside of the γ yarn guide member 10 is This method has disadvantages such as causing weft yarn slippage or being unable to fly the weft yarn to a desired distance.

In addition, even if the main body part 18 and the cover part 19 are bonded by an adhesive method such as caulking or half-attaching, 1. Due to variations in adhesion, the high-pressure air guided to the air passage 17 may leak from the bonded parts other than the air injection port 15, and a predetermined amount of air may not be ejected from the air injection port 15, resulting in auxiliary air from the intermediate nozzle 10a. There is a drawback that the airflow is not uniformly applied to the outer periphery of the main airflow, or a sufficient amount cannot be supplied to the outer periphery of the main airflow, resulting in weft insertion errors.

The present invention aims to improve the various drawbacks mentioned above, by preventing weft breakage within the weft guide member, and by applying the auxiliary air flow evenly and in the necessary amount to the outer circumference of the main air flow, thereby ensuring weft insertion errors. It is an object of the present invention to provide an intermediate nozzle of a jet loom which can be protected against air pollution.

In the present invention, the entire body is integrally molded by precision casting without bonding a part of the cover in which an air injection port is pre-drilled to the main body to form an annular part, and a reinforcing pin is installed inside the annular part. It is characterized by a structure with an air injection port.

Next, one embodiment of the present invention will be described based on the drawings.

As shown in FIGS. 4 and 5. The intermediate nozzle 10a of this embodiment is entirely integrally molded from lost wax except for the connector portion. That is, as shown in FIG.
1, and this mold is used as a wax mold 22. The features of this embodiment include the air inlet P to which the connector shown in FIG. Holes communicating with the core material 21 are provided in both sides R and S of the opening 14- provided in the northern part of the warp progressing side of the annular part 12, and in the second part T of the support part 13. 21 P-T
Only that part is not covered with the wax mold 22, and all other parts are covered and integrally molded with lost wax.

Pour the molten stainless steel into the wax mold 22 and
The material 21 made of ceramics except for the T part is covered with stainless steel. Next, the stainless steel encapsulated with ceramics is immersed in a sodium chloride solution to melt the ceramic and cause it to flow out of the P-T section. After forming the air passage 17 by the outflow of the ceramics, reinforcing pins 23 are inserted into the holes 9 to 1 above,
Each reinforcing pin 23 is welded on both sides of the annular portion. At this time, the reinforcing pins 23 at the R, S, and T portions are connected to the air passage 1.
Processed so as not to block 7. After sealing the air passage 17 with the reinforcing pin 23 except for the air inlet P, if necessary, both sides of the annular part 12 and arm part 11 are polished to form 24 air holes on the inner peripheral edge of the annular part 12. The injection port 15 is bored in a predetermined size, position, and direction.

Air inlet portion P of the intermediate nozzle 10a configured in this way
When the connector shown in FIGS. 2 and 3 is attached to the holder and high-pressure air is supplied, the high-pressure air flow passes through the air passage 17 of the arm portion 11 and is connected to the reinforcing pin 23 at the Q portion as shown by the arrow in FIG. 4. The air is divided into a clockwise airflow and a counterclockwise airflow, and is ejected from each air injection port 15 in a predetermined direction.

Note that the lost unit nozzle method shown in the above example is just one example, and the entire intermediate nozzle of the present invention can also be integrally molded by other precision casting methods. Further, the position and number of reinforcing pins are not limited to the above example. .

As described above, according to the present invention, the entire intermediate nozzle is integrally molded by JLT close casting, and after the reinforcing pin is horizontally suspended, the air injection port is bored in the inner peripheral edge of the annular part, so that the air can be injected. Variations in the opening direction and opening diameter of the injection ports can be reduced compared to conventional ones, and by inserting reinforcing pins at the branch points of the air flow in the annular part, a strong high-pressure air flow is generated uniformly from all air injection ports. is injected, and an auxiliary air flow is uniformly applied to the main air IAε from the main nozzle of the jet loom, thereby reliably preventing weft insertion errors.

In addition, by suspending one or more reinforcing pins horizontally in the annular part, even if the air pressure sent to the intermediate nozzle is increased, air leakage from the corners of the annular part is eliminated, allowing the weft to fly farther. This has the excellent effect of widening the interval between intermediate nozzles and reducing the number of intermediate nozzles as a whole.

[Brief explanation of the drawing]

FIG. 1 is an ini view of FIG. 2 showing the arrangement of conventional weft guide members, FIG. 2 is a front view of the conventional intermediate nozzle, FIG. 3 is a side view thereof, and FIG. 4 is the inventive intermediate nozzle. FIG. 5 is a BB cross-sectional view in FIG. 5 of the intermediate nozzle of the embodiment, FIG. 5 is a CC cross-sectional view in FIG. 4, and FIG. 6 is a cross-sectional view showing the mold body when molded by precision casting. 10a: intermediate nozzle, 12: annular portion, 15: air injection port, 17: air passage, 21: core material, 22: wax mold, 23:
Reinforcement pin. Applicant Samsung Manufacturing Co., Ltd. Figure 5 Figure 6 Figure 4 “B B

Claims (1)

[Scope of Claims] 1) An air injection port communicating with the air passage is bored in the inner circumferential edge of the annular portion in which an air passage is formed, and the auxiliary air flow is sent from the air injection port to the main nozzle of the jet loom. In the intermediate nozzle of the jet loom, which injects air over the entire outer periphery of the main air flow and in the injection direction of the main air flow, a molded body corresponding to the air passage is used as a core material, and this core material is encapsulated. Then, a mold corresponding to the annular part is made into a wax mold, a hole communicating with the core material is provided in a part of the wax mold, and the whole is integrally molded by precision casting, and the core material is formed into one piece.
An intermediate nozzle for a jet loom characterized by a structure in which the air passage is formed by melting and flowing out from the holes, reinforcing pins are inserted into the holes and the reinforcing pins are fixed on both sides of the annular part. 2) The jet loom according to Claim J intermediate nozzle. 3) The intermediate nozzle of the jet loom according to claim 1, wherein the reinforcing pin is inserted in the vicinity of the opening 1'' provided at the top of the warp progressing side of the annular portion.