JPS60167939A - Opening roller in open-end fine spinning frame - Google Patents

Abstract

PURPOSE:To enable the thickening of the sliver grain and the increase of the speed of open-end fine-spinning frame, by specifying the inclination angle, height and arrangement pattern of the pins implanted to an opening roller. CONSTITUTION:The pins 2 are arranged in zigzag pattern at regular intervals on two spiral lines A1-A2-A3-A4- and B1-B2-B3-B4 on the outer circumference of the roller staggering by a half pitch (1/2)P2 along the direction of width. It is necessary to select the inclination angle theta and the height h of the pin 2 within the ranges of 65-80 deg. and 2-3mm., respectively, to attain required break factor count strength product, U% and nep. It can be used adequately for the opening of cotton sliver.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an improvement of a spreading roller in an open-end spinning machine, and more particularly to a spreading roller in which a bottle is embedded instead of the currently widely used metallic wire.

Conventional technology A spreading roller whose surface is wrapped with metallic wire has a relatively large cross-sectional area at the tips of its teeth, which makes it difficult to bite into the sliver to be spread, and therefore produces a sufficient spreading effect for thick slivers. It is difficult to do so. In addition, the metallic wire itself has a base that is considerably wider than the thickness of the tip of the tooth, and is fixed by being pushed into the spiral groove carved on the roller surface. It is not possible to increase the tooth tip density in the direction. Furthermore, since the metallic wire has an angular cross-sectional shape, it has the advantage of high resistance to fibers and strong fiber gripping force, but has a disadvantage in terms of fiber peeling. In addition, it also has the major drawback of being prone to tooth tip wear. Therefore, it is not preferable in terms of opening performance and lifespan for opening slivers made of synthetic fiber staples which have a high coefficient of friction but have a high degree of opening and parallelism and do not require a twisting opening force.

The tips of the wire teeth are hardened to prevent wear, but winding the wire around small-diameter rollers such as opening rollers requires considerable flexibility, so it is difficult to increase the hardness. There are limits to improvement, and the desired results have not yet been achieved.

In view of these drawbacks of metallic wires, a spreading roller in which pins are implanted on the outer peripheral surface instead of wires has been proposed. According to this method, the cross-sectional shape is circular, so there is little resistance to the fibers, and since the needles are planted one by one, the desired hardening treatment can be performed, and there is also greater freedom in selecting the planting density in the width direction, so it is possible to save energy. It is possible to eliminate the drawbacks of Therefore, at present, fiber opening rollers equipped with bottles are being used for synthetic fibers. However, if this opening roller is used as it is for wire use, various problems will occur and the quality of the spun yarn will deteriorate.

Purpose and Summary of the Invention As a result of research, the present inventors have found that when a sliver is opened and the fibers are transferred into a rotor to form a yarn, the factors that have a large effect on the yarn quality of the opening roller are the pin arrangement, It has been found that the factors are the inclination angle of the pin, the height of the pin (needle height), and the rotation speed of the opening roller. As a result of various studies on the conditions for installing the pins of conventionally known bottle-shaped opening rollers, the present invention was completed by finding a combination that would give the best results for use with cotton slivers. That is, the present invention is a fiber opening roller for an open-end spinning machine, which has pins implanted on the cylindrical outer circumferential surface of a roller body, and the pins are arranged at predetermined intervals in the width direction over the entire circumference of the outer circumferential surface. was set as 2
The pins are arranged in a staggered manner on the snochilar line of the book, and the pins are arranged in a zigzag manner with respect to the outer peripheral surface in the rotational direction of the roller body.
It is tilted forward at a certain angle of inclination within the range of 5° to 80°, and the height of the tip of the pin from the outer circumferential surface is ll″t2.
The opening roller is set to a certain value within the range of ~3 degrees.

In this case, the row of needle heads is preferably perpendicular to the direction of the fibers arranged. As shown by I in Fig. 5, if the needle head row is perpendicular to the fiber length direction, the movement of the fiber in the X direction (lateral movement) when biting into the sliver is hindered, and the pin 2 moves in the Y direction (in the direction of fiber transfer), it is possible to comb the needles better, but as shown in ■, the needle head row
If the angle is other than perpendicular to the fibers, the fibers tend to move in the X direction, and the degree of combing V of the fibers decreases accordingly. Also, if the latitude density of the needle head is small,
Since the fibers move in the X direction between the needle heads and the number of fibers that cannot be combed increases, favorable fiber opening cannot be expected.

In the case of metallic wire, a wire is wound around the roller body, so a: distance between the tooth tips, b: distance between the tooth tips, chi, and D: diameter of the roller body. Since it is impossible to make N an integer due to the existence of π, it is impossible to make the tooth tip row perpendicular to the fiber, and even if it takes a value close to an integer, D % b Hiro is Since it is fixed, it is impossible to freely choose a. Furthermore, as mentioned above, it is difficult to increase the lateral density of the tooth tips.

On the other hand, in the case of pins, the needles are planted by drilling holes on the roller body, so the arrangement can be freely selected, and the lateral movement of the fibers (in the X direction) is suppressed, making it possible to spread the fibers without disturbing them. I can do it.

The pin arrangement is one square/4 as shown in Figure 3.
'The so-called one-lead type, in which pins are implanted along the inner wires c, -c, -c3-c4, and the snow arm type, which has multiple pins (four in the illustrated example) parallel to each other as shown in Figure 4. Iral line D
There is a so-called multi-lead type in which pins 2 are implanted at equal intervals along I-n, El-E, Fl-Fl, and G.

In the former case (Fig. 3), the pins 2 are arranged one by one at relatively close intervals on the coordinate axis X in the rotational axis direction of the roller body 1. Each bin always acts on the same position in the width direction of the sliver during each rotation of the roller. In order to strengthen the opening action, K is the distance lIF of the position where the opening acts in the sliver width direction in Fig. 3, and the pitch between the spiral lines P, = H/n.
It is necessary to reduce (H: Width of the needle part of the roller body, number of n varnish and irral) or increase the number of rotations to increase the number of times the bottle and sliver come into contact. If the needle head pitch P□ is made small, many bottles will come into contact with one fiber, and the fibers will be difficult to peel off.The pitch P in the width direction will also limit the diameter of the bottle. I can't make it smaller.

Since the bins 2 in FIG. 4 are present in a predetermined position on the coordinate axis X in a number corresponding to the number of spiral angles (four in the illustrated example), they exert a strong opening action on the fibers in this area. Give. When planting needles at the same pitch PI*P@ as shown in Figure 3, it is necessary to set multiple spiral lines in the width direction of the relatively narrow roller, and each spiral angle ψ'
Compared to the one-lead type, the number of needles acting on the same position increases, but on the other hand, the fibers being treated are more likely to be left unscraped, which is a paradoxical result, which is unfavorable for fiber opening.

In contrast to these conventional pin arrangements, in the opening roller of the present invention shown in FIG. It is planted. That is, as is clear from FIG. 2, the bin 2 is connected to the spiral line A set with the spiral angle
, -A, -A.

- A4 and another spiral line B set parallel to this at a position shifted by a half pitch uAP2) in the width direction,
-B, -B, -B4 Equally spaced PI on top of -85
It is planted with. Moreover, the S-Hiraira line A,
The bins 2 on B are characterized by being arranged in a staggered manner so that they are located at the midpoints of two adjacent bins on each other's line. According to this arrangement, the two spiral angles By arranging the bins on one line to occupy a position intermediate between two adjacent bins on the other line, the disadvantages of those in Figs. 3 and 4 can be avoided even though they have the same needle head density. It is possible to provide a fiber-spreading roller that overcomes the above problems, leaves no scraping, has an excellent fiber-spreading effect, and has less fiber wrapping.

Next, regarding the relationship between the bins and fibers that govern the opening of the sliver, Figures 6 to 8 show the needle height (bin height) and the parameter strength (Lee strength x number of counts). and oblique angle (
The relationship between pin inclination angle), 0% and oblique angle, and the number of nep and oblique angle are shown, respectively. All spinning conditions are as follows.

Raw material: Cotton (average fiber length 22mm) 100% Rotor rotation speed: 60.00 Orpm Opening: 7,000
R door (1 read staggered arrangement) Roller rotation speed Number of needles Near 02P Spinning count: 20S Twisting coefficient: 5.3 Regarding the relationship between the oblique angle and yarn quality, as shown in Figure 1A, the opening of the present invention The inclination angle (oblique angle) θ of the roller bin 2 is set to a constant value with respect to the rotational direction of the roller body 1. In the range of 60 to 90 degrees, the opening force improves as the angle θ becomes smaller, but fiber breakage increases and peeling becomes poor, making it easier for the fibers to wrap around during opening. When the size increases, the opening force decreases, while the fiber gripping force also decreases, making it difficult to transport the H&string in an even manner. Therefore, when the inclination angle θ of bin 2 decreases, the count strength product decreases, and when it increases, it almost reaches an equilibrium state and reaches 0%
.

From these results, in order to spin high-quality yarn, the 6th step is necessary.
As shown in Figures to Figure 8, the inclination angle (angle of inclination) of the bottle is 6.
It has become clear that it is necessary to set the angle to a constant value within the range of 5° to 80°.

Regarding the relationship between bottle height (needle height h) and yarn quality shown in Figure 1B, in the range of 1 to 5 bleaching, if the needle height is low, the length of the bottle penetrating into the sliver is insufficient, resulting in a fiber opening effect. If the effect is not exerted or is high, the action becomes excessive and fiber breakage increases, while the fibers sink, making it difficult to separate the fibers. In either case, the quality of the spun yarn deteriorates, which is undesirable.

Therefore, if the needle height exceeds the appropriate range, the mechanical force product will decrease, and the number of needles will also deteriorate.

Based on these results, in order to spin high-quality yarn, K should have a pin height h of 2 to 3, as shown in Figures 6 to 8.
It was found that it was necessary to maintain a constant value within the range of (2).

The relationship between the rotational speed of the opening roller that controls the opening of the sliver and the yarn quality is shown in FIGS. 9 to 11. The spinning conditions are as follows.

Raw material: Cotton (average fiber length 22 fibers) 100mm Rotor rotation speed: 60.00Orpm Spinning count: 208 Twisting coefficient: 5.3 Oblique angle = 75° Needle height: 2.5+m Number of needle heads near 02P Spreading roller Rotation speed (1 read, 2 rows) is 4,000 to 1
In the range of 0.00 Orpm, as the rotational speed decreases, the opening force is insufficient, while the centrifugal force acting on the fibers becomes insufficient, making it difficult to peel, and as the rotational speed increases, the opening force increases too much. As the number of fiber breaks increases, the centrifugal force acting on the fibers becomes excessive, and the fiber gripping force of the pin decreases, making it difficult to transport the fibers in an even manner. Therefore, when the rotational speed of the opening roller exceeds the appropriate range, the count strength product decreases, and the U, N, and D numbers also deteriorate.

From these results, in order to spin high-quality yarn, K is the 9th
As shown in Fig. 11, the number of rotations of the opening roller is set to 6,
It has become clear that it is necessary to maintain a constant value within the range of 000 to 8.00 Orpm.

Finally, the relationship between the number of needle heads and yarn quality, which is thought to control the opening of the sliver, is shown in FIGS. 12 to 14.

All spinning conditions are as follows.

Raw material: 100% cotton (average fiber length 22 mm) Rotor rotation speed: 60.00 Orpm Spinning count = 208 Twist coefficient = 5.3 Oblique angle near 5° needle Height: 2.5+a Relationship between number of needle heads and yarn quality Experiments were conducted in the range of 468 to 936 needles, and contrary to expectations, it became clear that the number of needle heads had almost no effect.

As is clear from the above results, the present invention relates to a fiber opening roller for an open-end spinning machine in which a pin is implanted on the cylindrical outer peripheral surface of the roller main body 10, and the pin is attached to the entire periphery of the outer peripheral surface. They are arranged in a staggered manner on two horizontal lines set at a predetermined interval in the width direction,
The pin is inclined forward at a certain inclination angle within the range of 65° to 80° in the rotational direction of the roller body with respect to the outer circumferential surface, and the height of the tip of the pin from the outer circumferential surface is Saha 2~
It is necessary that the opening value is set to a certain value within the range of 3.
It works best when operated at speeds in the range of 0.000 to 8.00 rpm.

The effects of the present invention will become clearer from the following specific numerical values based on the results of spinning experiments.

〔experiment〕

The quality of spun yarn was compared using each opening roller according to the following specifications.

Margins below As described above, the yarn spun by the spreading roller of the present invention was superior in both strength and yarn unevenness as compared to the conventional spreading roller using a bottle.

Effects of the Invention As detailed above, according to the present invention, the bin-type opening roller, which was conventionally considered to be unsuitable for wire use, has been improved by specifying the inclination angle, height, arrangement, and 9 turns of the bin. We have succeeded in putting this into practical use, and it is highly effective as it can cope with the increase in the thickness of the sliver and the increase in the speed of open-end spinning machines due to the rationalization of the pre-spinning process.

[Brief explanation of drawings]

FIG. 1A is a front sectional view showing a part of the bottle-shaped opening V-ra;
FIG. 1B is a side sectional view, FIG. 2 is a developed view showing the bin arrangement of the opening roller of the present invention, FIGS. 3 and 4 are developed views showing two conventional types of pin arrangement, and FIG. Explanatory diagrams of lateral movement of fibers due to pin arrangement, Figures 6 and 7
Figure 8 is a diagram showing the relationship between the oblique angle with the needle height as a parameter and each element of yarn quality, and Figures 9, 10, and 11 are diagrams showing the rotation speed of the opening roller and each element of yarn quality. FIGS. 12, 13, and 14 are diagrams showing the relationships between the number of needle heads and each thread quality element, respectively. 1... Combing roller, 2... Bin, Al-A4
;B1~B6;Ct ""C4: Ds + 0
2; Et rEt * FI + F2? G.
・Spiral wire. Patent Applicant Co., Ltd. Toyota Automatic Loom Works Patent Application Representative Patent Attorney Akira Aomai Patent Attorney Kazuyuki Nishidate Patent Attorney Akira Yamaguchi Patent Attorney Masaya Nishiyama 1A 1B Figure 2 2 Figure 3 M Pieces 4 figure

Claims (1)

[Scope of Claims] 1. A fiber opening roller for an open-end spinning machine, which has a bottle implanted on the cylindrical outer circumferential surface of a roller body, wherein the bottle extends in a predetermined width direction over the entire circumference of the outer circumferential surface. The bins are arranged in a staggered manner on two square lines set with an interval of The opening roller is tilted forward at a certain angle of inclination, and the height of the tip MS of the bottle from the outer peripheral surface is set to a certain value within the range of 2 to 3 mm. 2. The opening roller according to claim 1, 1. 6,000 to s, oo during normal operation. The opening roller is set to be driven at a rotation speed in the range of rpm.