JP7308988B2 - Spinning nozzles and spinning equipment - Google Patents

Description

The present disclosure relates to spinning nozzles and spinning apparatus for use in Taslan (DuPont®) processing of yarn.

Taslan processing has been widely used in the past as a method of tightly binding yarn into a bulky loop by the force of compressed air. As a nozzle used for this taslan processing, Patent Document 1 discloses a direct yarn passage through which a yarn is introduced from one end and a textured yarn is pulled out from the other end, and compressed air that communicates in the yarn passage and feeds the yarn in the traveling direction. Texture nozzles have been proposed with oblique compressed air holes for supplying the Patent Document 1 describes that the texture nozzle is made of ceramics, cemented carbide or special steel.

Japanese Patent No. 3215341

The spinning nozzle of the present disclosure includes a supply portion having a first through hole through which yarn is supplied along the central axis, a second through hole connected to the first through hole along the central axis, and the second through hole and a discharge portion having a third through hole connected to the second through hole along the central axis and discharging the entangled yarn. and; protective cylinders which are installed in the plurality of through-holes and have flow paths for supplying gas for entangling the yarn from the outside toward the second through-holes.

A spinning device of the present disclosure comprises the spinning nozzle described above.

1 is a schematic cross-sectional view of a spinning nozzle according to one embodiment of the present disclosure; FIG. FIG. 2 is an enlarged cross-sectional view showing an example of an interlaced portion in FIG. 1; 4 is an enlarged cross section showing another example of the entangled part. FIG. 4 is a schematic cross-sectional view of a spinning nozzle according to another embodiment of the present disclosure;

A spinning nozzle according to an embodiment of the present disclosure will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing one embodiment of the spinning nozzle of the present disclosure.

A spinning nozzle 1 shown in FIGS. 1 and 4 is used in a so-called taslan spinning apparatus. Taslan processing usually involves blowing compressed air onto threads (filaments) to mix and entangle the threads, forming loops or slack on the surface of the threads, thereby increasing bulkiness and creating a soft texture. say.

The spinning nozzle 100 includes a main cylinder 1 in which a tubular supply part 2, an interlacing part 3, and a discharge part 4 are arranged in order in the direction indicated by the arrow A along the central axis C (axis). .
The supply section 2 has a first through hole 5 through which the yarn is supplied in the direction indicated by the arrow A. As shown in FIG. The interlaced portion 3 has a second through hole 6 along the central axis C and connected to the first through hole 5 . The discharge part 4 has a third through hole 7 connected to the second through hole 6 along the central axis C and discharging the entangled yarn.
Each of the first through hole 5, the second through hole 6 and the third through hole 7 has a circular cross-sectional shape perpendicular to the central axis C. As shown in FIG.

The entangled portion 3 further has a plurality of through holes 8 intersecting with the second through holes 6 . Each through-hole 8 extends from the bottom of a notch 9 formed on the outer peripheral surface of the intertwined portion 3 toward the second through-hole 6 . Two to five through-holes 8 are preferably formed in the circumferential direction of the main cylinder 1 . The notch portion 9 is for attaching an air pipe such as air.

Protective cylinders 10 are mounted in the plurality of through holes 8 (see FIG. 2). The protective tube 10 has a flow path 11 for supplying a gas such as air for entangling the yarn from the outside toward the second through hole 6 . Therefore, it is not necessary to pierce the spinning nozzle from the outside to form a flow path during manufacturing, unlike the conventional art, so that the portion where the flow path 11 and the second through hole 6 intersect at an acute angle is not chipped. In addition, even when the number of times of contact with the thread increases at the intersection, the thread is less likely to break.
That is, when the compressed air hole and the yarn passage are integrally formed as in the conventional art, manufacturing is difficult. , the sharply intersecting portion at the opening edge of the compressed air hole is likely to be chipped.
The flow path 11 is inclined from the outer peripheral surface of the entangled portion 3 toward the discharge portion 4 . The inclination angle of the channel 11 with respect to the central axis C is preferably about 40° or more and 56° or less, preferably about 43° or more and 53° or less. In addition, the cross-sectional shape of the flow path 11 is not limited to a circular shape, and may be an elliptical shape, a rectangular shape, or other polygonal shape.
The inner diameter of the protective cylinder 10, that is, the diameter of the flow path 11, is preferably 0.3 mm or more and 1.0 mm or less. Also, the thickness of the protective cylinder 10 is preferably 1.0 mm or more and 2.0 mm or less.

As shown in FIG. 2, one end 10a of the protective cylinder 10 is located at the intersection of the through hole 8 and the second through hole 6, and at least the end face located at the intersection is preferably a polished surface. As a result, the unevenness of the end face is reduced, so that the yarn is less likely to be caught on the end face and the interlacing efficiency is improved. The protective cylinder 10 may have a polished surface over the entire surface including the one end 10a. In addition, one end 10a of the protective cylinder 10 must be located at the intersection of the through hole 8 and the second through hole 6, and it is preferable that the one end 10a protrude excessively into the second through hole 6. do not have.

The protective cylinder 10 is manufactured separately from the main cylinder 1 including the interlaced portions 3 . Therefore, it is necessary to prevent the protective cylinder 10 from easily dropping out of the through hole 8 of the main cylinder 1 , so the outer wall surface of the protective cylinder 10 is joined to the inner wall surface of the through hole 8 .
For this purpose, for example, it is preferable to interpose an intervening layer 12 mainly composed of glass or epoxy resin between the inner wall surface of the through hole 8 and the outer wall surface 10 of the protective cylinder. As a result, the bonding strength of the protective cylinder 10 to the main cylinder 1 is increased, thereby improving reliability over a long period of time.

Examples of the glass include low-melting-point glass frit and the like. An example of a low-melting-point glass frit is bismuth containing 70% or more Bi ₂ O ₃ , 15% or less each of B ₂ O ₃ and ZnO, and 5% or more of a mixture of organic substances such as ethyl cellulose and terpineol. A system seal, frit paste, or the like can be used.
The intervening layer 12 containing epoxy resin as a main component includes, for example, an epoxy resin adhesive.
Having glass or an epoxy resin as a main component means that these are contained in an amount of 70% by mass or more of the total amount.

Another intervening layer 12 may be composed mainly of cyanoacrylate. For example, an adhesive layer 12 containing α-cyanoacrylate as a main component can be used. Having cyanoacrylate as a main component means that 70% by mass or more of the total amount of cyanoacrylate is contained. Since the intervening layer 12 containing cyanoacrylate as a main component can be easily dissolved in an organic solvent such as acetone, the diameter of the flow path 11 can be varied according to the material and thickness of the threads to be entangled and the application. can be exchanged for

Further, when both the main cylinder 1 and the protective cylinder 10 are made of ceramics, the inner wall surface of the through-hole 8 and the outer wall surface of the protective cylinder 10 can be brought into contact with each other and joined without intervening the intervening layer 12. can be done. At that time, after polishing the inner wall surface of the through hole 8 and the outer wall surface of the protective cylinder 10 in advance, at least one of the surfaces is sprayed with water to adhere thereto, and then the protective cylinder 10 is inserted into the through hole 8. is press-fitted, the inner wall surface of the through hole 8 and the outer wall surface of the protective cylinder 10 are attracted to each other. By performing heat treatment while pressing the attraction surface in this state, both surfaces are joined to each other. The weight of the protective cylinder 10 is used as the pressing force, and the heat treatment is preferably performed at a temperature of 1000° C. or higher and 1800° C. or lower for about 30 to 120 minutes. In such a mode, since there is no intervening layer 12, particles detached from the intervening layer 12 are unlikely to adhere to the yarn, so that a high-quality yarn can be obtained.

The main cylinder 1 is preferably made of ceramics such as titanium carbide ceramics, titanium carbonitride ceramics, titanium nitride ceramics, aluminum oxide ceramics, zirconium oxide ceramics, and composite ceramics of aluminum oxide and zirconium oxide. Aluminum oxide ceramics, zirconium oxide ceramics, and composite ceramics of aluminum oxide and zirconium oxide are particularly preferable. Thereby, the mechanical properties and wear resistance of the main cylinder 1 can be enhanced.
The mechanical properties of the ceramics include, for example, a Vickers hardness of 10 GPa or more according to JIS R 1610:2003, and a three-point bending strength of 310 MPa or more according to JIS R1601:2008.

The ceramics constituting the main cylinder 1 is, for example, titanium carbide ceramics, in which titanium carbide accounts for 70% by mass or more of the total 100% by mass of the components, such as titanium carbonitride ceramics and titanium nitride. The same is true for crystalline ceramics, aluminum oxide ceramics and zirconium oxide ceramics. Composite ceramics of aluminum oxide and zirconium oxide are ceramics containing at least 10% by mass of aluminum oxide and 10% by mass or more of zirconium oxide out of a total of 100% by mass of the components, and occupying a total content of 70% by mass or more.
Here, the components constituting the ceramics can be identified from the measurement results by an X-ray diffractometer using CuKα rays, and the content of each component can be determined by, for example, an ICP (Inductively Coupled Plasma) emission spectrometer or a fluorescence spectrometer. It can be determined by an X-ray analyzer.

The protective tube 10 is made of, for example, ceramics, metal, resin, or the like, which has excellent wear resistance. As the ceramics, for example, ceramics similar to the above-mentioned ceramics constituting the main cylinder 1 can be used. Examples of metals that can be used include stainless steel (SUS304, etc.), carbon steel (S35C, S45C, etc.), general structural rolled steel (SS400, etc.), aluminum, aluminum alloys, magnesium or magnesium alloys. Examples of resins that can be used include polyethylene, polyvinyl chloride, polystyrene, polycarbonate, polysulfone, polyamide, polyphenylene oxide, urea resin, melamine resin, phenol resin, and epoxy resin.

The inner wall surface of the protective cylinder 10 forming the flow path 11 is the difference between the cut level at a load length rate of 25% in the roughness curve and the cut level at a load length rate of 75% in the roughness curve. is preferably 0.3 μm or less (excluding 0 μm) in the roughness curve.
Moreover, the inner wall surface of the protective cylinder 10 forming the flow path 11 preferably has an arithmetic mean roughness Ra of 0.2 μm or less (excluding 0 μm) in the roughness curve.
Similarly, at least one of the inner wall surfaces forming the first through hole 5, the second through hole 6 and the third through hole 7 has a cut level at a load length rate of 25% in the roughness curve and a roughness The cut level difference (R.delta.c) on the roughness curve, which represents the difference from the cut level at 75% load length rate on the curve, is preferably 0.3 .mu.m or less (excluding 0 .mu.m).
At least one of the inner wall surfaces forming the first through hole 5, the second through hole 6, and the third through hole 7 has an arithmetic mean roughness Ra of 0.2 μm or less (excluding 0 μm) in the roughness curve. It is good to have
When the cutting level difference (Rδc) is 0.3 μm or less or the arithmetic mean roughness Ra is 0.2 μm or less, the unevenness of the surface texture of the inner wall surface becomes small, so turbulence in the flow path 11 is less likely to occur. . In addition, since the inner wall surface becomes highly water-repellent, dirt does not easily adhere to the inner wall surface, so that the inner wall surface can be cleaned easily and the number of times of cleaning can be reduced.

Cutting level difference (Rδc) and arithmetic mean roughness (Ra) conform to JIS B 0601: 2001 and are measured using a shape analysis laser microscope (manufactured by Keyence Corporation, VK-X1100 or its successor model). can be done. The measurement conditions are a magnification of 120, no cutoff value λs, a cutoff value λc of 0.08 mm, and no cutoff value λf. For the measurement method, the measurement range per location from the inner wall surface to be measured is set to, for example, 1024 μm × 768 μm, and the measurement target is arranged at approximately equal intervals along the longitudinal direction for each measurement range. Draw four lines. Then, line roughness measurement may be performed for a total of eight lines to be measured in two measurement ranges. The length of one line to be measured is, for example, 1280 μm.

As described in detail above, the spinning nozzle 100 includes the protective tube 10 having the flow path 11 for supplying the gas that entangles the yarn toward the through hole 8 formed in the main tube 1 toward the second through hole 6. is attached, the flow path 11 can be easily formed, and the manufacturing of the spinning nozzle 100 is facilitated. Hard to miss.

FIG. 3 shows another example of the interlaced portion 3' in the present disclosure. As shown in the figure, the protective tube 10' has a flange portion 13 that engages with the bottom surface of the notch portion 9. As shown in FIG. Therefore, there is an advantage that the protective cylinder 10' can be easily positioned when it is mounted in the through hole 8, and the manufacturing efficiency is improved. Others are the same as the above-described embodiment, so the same reference numerals are given and the description is omitted.

As shown in FIG. 4, the first through-hole 5 has a truncated cone-shaped inner peripheral surface 2a that decreases in diameter from the thread supply side toward the second through-hole 6. The apex angle α of the surface 2a is preferably 13° or more and 19° or less. When the apex angle α is 13° or more, the opening area on the side to which the yarn is supplied becomes large, so the yarn can be easily supplied. When the apex angle α is 19° or less, a sufficient thickness can be ensured around the end face on the side where the yarn is supplied, so that chipping or chipping from the supply section 2 is less likely to occur.
The third through hole 7 has a trumpet-shaped inner peripheral surface 7a that expands in diameter toward the yarn discharge side, and the radius of curvature R of the inner peripheral surface that forms the trumpet-shaped inner peripheral surface 7a is It may be four times or more the diameter of the two through holes 6 . The trumpet-shaped inner peripheral surface 7a has the function of forming loops and slack on the thread-like surface, and a supersonic flow is generated in the third through hole 7 to obtain an air velocity of, for example, 450 m/s or more. Therefore, the trumpet-shaped inner peripheral surface 7a increases the yarn discharge speed and improves the production efficiency.
If the radius of curvature R of the trumpet-shaped inner peripheral surface 7a is four times or more the diameter of the second through hole 6, the interlacing of the yarns will be performed more efficiently.
For example, the diameter of the second through hole 6 is 1 mm or more and 1.4 mm or less, and the curvature radius R of the inner peripheral surface 7a is 5 mm or more and 7 mm or less.
Others are the same as the above-described embodiment, so the same reference numerals are given and the description is omitted.

The spinning nozzle 100 of the present disclosure is used in a spinning apparatus for spinning Taslan yarn.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and various modifications and improvements are possible.

1 main cylinder 2 supply part 2a inner peripheral surface 3 entangled part 4 discharge part 5 first through hole 6 second through hole 7 third through hole 7a inner peripheral surface 8 through hole 9 notch 10 protection tube 10a one end 11 flow path 12 intervening layer 13 flange portion 100 spinning nozzle

Claims (16)

a supply unit having a first through hole through which the yarn is supplied along the central axis;
an interlaced portion having a second through-hole connected to the first through-hole along the central axis and a plurality of through-holes intersecting the second through-hole;
a main cylinder comprising a discharge portion having a third through hole connected to the second through hole along the central axis and discharging the entangled yarn;
and a protective cylinder, which is installed in each of the plurality of through holes and has a flow path for supplying gas for entangling the yarn from the outside toward the second through holes. 2. The spinning nozzle according to claim 1, wherein one end of the protection tube is positioned at the intersection of the through hole and the second through hole, and at least an end face positioned at the intersection is a polished surface. 3. The spinning nozzle according to claim 1, further comprising an intervening layer mainly composed of glass or epoxy resin between the inner wall surface of said through-hole and the outer wall surface of said protective cylinder. 3. The spinning nozzle according to claim 1, further comprising an intervening layer containing cyanoacrylate as a main component between the inner wall surface of said through-hole and the outer wall surface of said protective tube. 3. The spinning nozzle according to claim 1, wherein the inner wall surface of the through hole and the outer wall surface of the protective cylinder are in contact with each other. The inner wall surface of the protective cylinder forming the flow path is the difference between the cut level at a load length rate of 25% on the roughness curve and the cut level at a load length rate of 75% on the roughness curve. 6. The spinning nozzle according to any one of claims 1 to 5, wherein the cutting level difference (Rδc) in the roughness curve representing is 0.3 µm or less (excluding 0 µm). The spinning according to any one of claims 1 to 6, wherein the inner wall surface of the protective cylinder forming the flow path has an arithmetic mean roughness Ra of 0.2 µm or less (excluding 0 µm) in a roughness curve. nozzle. The spinning nozzle according to any one of claims 1 to 7, wherein the channel and the second through hole intersect at an acute angle. 9. The flow path according to claim 8, wherein the flow path is inclined from the outer peripheral surface of the interlaced portion toward the discharge portion, and the inclination angle of the flow path is 40° or more and 56° or less with respect to the central axis. spinning nozzle. The spinning nozzle according to any one of claims 1 to 9, wherein the main cylinder is made of ceramics, and the protective cylinder is made of ceramics, metal or resin. A cutout portion is formed on the outer peripheral surface of the interlaced portion, the through hole extends from the bottom of the cutout portion toward the second through hole, and the protective cylinder extends from the cutout portion. The spinning nozzle according to any one of claims 1 to 10, which has a flange portion that engages with the bottom surface. The first through hole has a truncated cone-shaped inner peripheral surface that decreases in diameter from the thread supply side toward the second through hole, and the truncated cone-shaped inner peripheral surface has an apex angle of 13. 12. The spinning nozzle according to any one of claims 1 to 11, wherein the angle is 19° or more. The third through-hole has a trumpet-shaped inner peripheral surface that expands toward the side where the yarn is discharged, and the radius of curvature of the inner peripheral surface of the discharge portion that forms the trumpet-shaped inner peripheral surface. is four times or more the diameter of the second through hole. At least one of the inner wall surfaces forming the first through hole, the second through hole, and the third through hole has a cutting level at a load length rate of 25% in the roughness curve, and Any one of claims 1 to 13, wherein the cut level difference (Rδc) in the roughness curve, which represents the difference from the cut level at a load length rate of 75%, is 0.3 µm or less (excluding 0 µm). The spinning nozzle according to 1. At least one of the inner wall surfaces forming the first through hole, the second through hole, and the third through hole has an arithmetic mean roughness Ra of 0.2 μm or less (excluding 0 μm) in the roughness curve. The spinning nozzle according to any one of claims 1 to 14, wherein A spinning device comprising the spinning nozzle according to any one of claims 1 to 15.

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