JPS6175829A - Fiber feed channel of adsorbing, twisting and spinning device - Google Patents

Abstract

PURPOSE:To increase degree of parallelism of spun yarn of fiber and to reduce end breakage during spinning, by setting a pair of electrodes having electrode faces approximately in parallel with the direction of fiber movement in a fiber feed channel. CONSTITUTION:A pair of the electrodes 29 and 30 are set at the outlet side of the fiber feed channel 20 having an approximately rectangular section, and both the electrodes 29 and 30 curved in such a way that rectangular parallel electrodes are protruded each other inner side in a circular arc. The opened fiber F is elongated in the channel part, orientated in parallel with a yarn- forming line, in this state the fibers are adsorbed and piled on the surface of the twisting roller and twisted by both the rollers. The opened fiber F is rapidly transferred to the outlet without being retained in the vicinity of the side wall of the nonelectrode side of the fiber feed channel.

Description

DETAILED DESCRIPTION OF THE INVENTION Purpose of the Invention (Field of Industrial Application) This invention is directed to a method in which spread fibers supplied through a fiber supply channel are heated by the surfaces of a pair of heating rollers disposed adjacent to each other and rotating in the circumferential direction. This invention relates to a fiber supply channel of an adsorption/heating spinning device in which the fiber is spun as yarn by being heated while being attracted to at least one of the heating rollers in the wedge-shaped space that is formed.

(Prior art) Conventionally, as this type of adsorption heating spinning device, the device shown in Figs.
It is disclosed in Publication No. 134.

In this device, fibers opened by a fiber opening device (not shown) are guided to a fiber supply duct 41, and a wedge-shaped space is formed by a spinning roller 42 and a perforated roller 43 that are arranged close to each other and rotate in the circumferential direction. supplied to R;
The perforated roller 43 is attracted to a position corresponding to the intake port 448 of the intake duct 44 disposed inside the perforated roller 43 .
It is heated by the rotation of the spinning roller 42, is pulled out as a yarn Y in the axial direction of the porous roller 43 by the pull-out roller 45, and is wound up as a package P by the winding roller 46. However, in this type of conventional device, the opening a flying inside the fiber supply duct 41
The im fiber is due to the intake action of the intake duct 44! Although the fibers are advanced by the air flow generated in the Li fiber supply duct 41, since the porous roller 43 and the fiber supply duct 41 are not parallel, even straight fibers are bent when adsorbed and deposited on the surface of the porous roller 43. For this reason, it is difficult to deposit the fibers on the surface of the perforated roller 43 in a state parallel to the yarn formation line, resulting in yarn breakage during spinning, resulting in uneven yarn appearance and low yarn strength. There's a problem. As shown in FIG. 8, when the fiber supply duct 41 and the surface of the porous roller 43 are arranged so that the angle formed between them is an acute angle, the arrangement of the fibers can be improved to some extent, but the fiber supply There is a limit to how close the duct 41 can be to parallel to the perforated roller 43.

As a means to improve this problem, on December 14, 1982,
In Japanese Patent Publication No. 57-59328, as shown in FIG.
A device has been proposed in which an air flow that is practically parallel to the axis of the spun yarn, that is, the axis of the perforated roller 43, acts on the fibers at the end of the fiber supply duct 41 by the suction action of 7. However, since the fibers opened by the opening device are not necessarily stretched straight, even if there is an air flow that is almost parallel to the surface of the perforated roller 43, all the KM fibers are stretched sufficiently. Moreover, it cannot be deposited on the surface of the porous roller 43 in a state parallel to the yarn forming line. Therefore, although there has been some improvement, there are many yarn breakages during spinning, the yarn appearance is insufficiently uniform, and the yarn strength is still low. There is one problem.

In order to solve the above problems, the inventors of the present invention disposed a pair of electrodes in the fiber supply duct (fiber supply channel), and
We have invented an adsorption heating spinning device that applies an electric field to spread fibers moving along an airflow in a fiber supply channel to adjust the orientation of the fibers. However, when flat electrodes are arranged parallel to each other, the air flow inside the fiber supply channel is faster in the center and slower near the side walls, and the fiber supply channel formed of an insulating material is There is a problem in that the open fibers moving in the fiber supply channel stagnate near the wall surface due to the action of static electricity charged on the side wall, causing uneven thickness of the spun yarn.

(Problems to be Solved by the Invention) This invention solves the problem that in the conventional apparatus, it is difficult to deposit spread fibers on the heating roller surface in a sufficiently elongated state and in a state parallel to the yarn forming line. Problems such as yarn breakage, asymmetrical yarn appearance, and low yarn strength are caused by the occurrence of yarn breakage, and in order to solve these problems, a pair of flat plate electrodes are installed in the fiber supply channel. This solves the problem that the spun yarn stagnates near the non-electrode side wall surface of the channel, causing uneven thickness of the spun yarn.

Structure of the Invention (Means for Solving the Problems) In this invention, as a means for solving the above problems,! The spread fibers supplied through the navy blue supply channel are adsorbed to at least one of the heating rollers in a wedge-shaped space formed by the surfaces of a pair of heating rollers that are arranged adjacent to each other and rotate in the circumferential direction. In an adsorption/heating spinning device that spins a yarn by receiving a heating effect, a pair of electrodes whose electrode surfaces are substantially parallel to the direction of fiber movement are provided in the fiber supply channel, and the shapes of both electrodes are adjusted so that the distance between the two electrodes is We adopted a configuration in which the center part is smaller than the sides.

(Function) In this invention, the fibers opened by the opening device and sent to the fiber supply channel are carried by the suction airflow from the suction port of the suction pipe disposed inside the porous roller serving as the heating roller. The fibers move to the surface side of the porous roller, are deposited on the surface of the porous roller corresponding to the suction port, are twisted by both heating rollers, and are pulled out as a thread. When the open 41i fibers moving in the fiber supply channel pass through the electric field channel section where a pair of electrodes are arranged, the fibers are oriented in a certain direction perpendicular to both electrode surfaces, that is, parallel to the yarn forming line. It is deposited on the surface of the porous roller. The fibers that are opened by the opening device and moved within the channel are not necessarily stretched straight, and some are in a bent state.

However, when these fibers reach the space between the two electrodes, they are stretched in a direction perpendicular to the electrode plane by the electric field formed between the two electrodes.

Therefore, the fibers are deposited on the surface of the porous roller in a state in which they are stretched in a direction perpendicular to the wire rail surface and oriented parallel to the yarn formation line, so the spun yarn twisted in this state has a uniform appearance. Thread strength is also improved and thread breakage is reduced.

In addition, since the two electrodes are formed such that the distance between the two electrodes is smaller on the center side than on both sides, both 75
The electric field generated between % is strong at the center and weak at both ends. Therefore, when the spread fibers pass between the two electrodes, they are oriented in a direction parallel to the lines of electric force due to the orientation force of the electric field, that is, in a direction parallel to the line of yarn formation, and also due to the gradient force. It is pulled toward the center of the channel where the electric field is strong. Therefore, the spread fibers do not stagnate near the wall surface of the fiber supply channel, but quickly move to the exit side, and are adsorbed and deposited on the surface of the 130-twist roller, so that uneven thickness does not occur in the spun yarn.

(Embodiment) An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 4. A support base 2 made of an insulating material such as plastic, which is fixed to the matching frame 1 with bolts, has a third
As shown in the figure, two fittings 7L3 and 4 are formed adjacent to each other, a cylindrical plastic support cylinder 5 is fitted at the base end of one fitting hole 3, and the other fitting hole 3 is fitted with a cylindrical plastic support tube 5 at its base end. A plastic suction vibro, which also serves as a support tube, is fitted and fixed in the matching hole 4. The suction vibro has its proximal end connected to a suction source (not shown), and a narrow suction port 6a extending along the longitudinal direction is formed at a position adjacent to the support cylinder 5. Bearings 7 and 8 are fitted and fixed inside the support cylinder 5 and the suction vibro, and rotating shafts 9.10 are fitted and fixed to both bearings 7.8, respectively. both bearings 7,
8 has an insulating outer tube 7a made of plastic on the outer periphery, respectively.
It is formed by equipping bearings 7c, 8c at both internal ends of metal housings 7b, 8b into which the bearings 8a are fitted, and a rubber lid 8d is fitted to the lower end of the bearing 8. A non-perforated roller 11 as a heating roller is fixed to the protruding end of one rotating shaft 9 at its base end attachment portion 12 so as to be rotatable around the outer periphery of the support @5. Further, a porous roller 13 as a heating roller is fixed to the protruding end of the other rotating shaft 10 at a base end attachment portion 14 so as to be rotatable along the outer periphery of the suction vibro. The non-perforated roller 11 and the perforated roller 13 are rotated in the circumferential direction by being pressed against the drive belt 15 at the base end attachment portion 12.14.

The non-perforated roller 11 is formed by adhering a cylindrical covering member 17 made of an insulating elastic material such as polyurethane or rubber to a metal cylindrical core 16 with which the base end attachment portion 12 is integrally formed. The perforated roller 13 is formed by fixing one ceramic perforated cylinder in which a large number of through holes 19a are formed to a metal cylindrical core 18 with which the Nm mounting portion 14 is integrally formed.

On one side of the non-perforated roller 11 and the perforated roller 13, a second
As shown in the figure, a fiber supply device 21 has a fiber supply channel 20 whose tip portion is formed in a shape corresponding to the wedge-shaped space R formed by the outer peripheral surfaces of both rollers 11 and 13.
The fiber supply channel 20 is arranged to correspond to the wedge-shaped space R. The fiber supply device 21 includes a fiber opening roller 2
2, and a housing of a spreading unit 26 equipped with a feed roller 24 and a presser 25 for supplying the sliver 23 to the spreading roller 22 is made of metal, and its pond part is made of an insulating material such as plastic. ing.

Further, above the fiber supply device 21, a drawer opening 27 and a winding device 28 are arranged.

The fiber supply channel 20 has a substantially rectangular cross section, and a pair of electrodes 29, 30 are disposed on both upper and lower sides of the outlet side (left side in FIG. 1.2). Both electrodes29.
As shown in FIG. 4, 30 is formed by bending rectangular flat plate electrodes into an arc shape convex inwardly. A grounding terminal 31 is connected to one electrode 29 disposed on the upper side.
A high voltage side electrode terminal 32 connected to a high voltage power source (not shown) is connected to the other electrode 3o disposed on the lower side. The high voltage may be either positive or negative, and the magnitude of the voltage is changed depending on the speed of the airflow flowing in the fiber supply channel 20, and the speed of the airflow is 5 to 14 m.
Preferably, the potential difference is varied between 10 and 30 KV/sec.

Next, the operation of the apparatus configured as described above will be explained. The sliver 23 that is fed to the opening roller 22 at a constant speed by the cooperation between the presser 25 and the feed roller 24 is opened by the opening roller 22, and then passed through the fiber supply channel 20.
sent inside.

The spread fibers F fed into the fiber supply channel 20 ride on the suction airflow caused by the action of the suction vibro to 4! Move to the exit side of the JAi supply channel 20.

The fibers are opened by the opening row 522 and sent to the fiber supply channel 2.
The fibers F moving within 0 are not necessarily stretched sufficiently,
Some are bent. However, when these IJl fibers reach between both electrodes 29.30, both electrodes 29.30
Due to the strong electric field formed therebetween, the fibers F are stretched in a direction perpendicular to both electrode surfaces (parallel to the axis of the perforated roller 13).

That is, when the fiber F passes between the electrodes 29.30, induced polarization occurs inside each fiber F due to the action of the electrodes 29.30, and positive and negative charges are concentrated at both ends of the fiber F, respectively. The fiber F is stretched in the direction of the electric field. On the other hand, the airflow flowing through the fiber supply channel 20 has a high flow rate in the center and is slow in a position close to the wall surface. Moreover,
Since the wall surface of the fiber supply channel 20 formed of an insulating material is charged with static electricity, when the electrodes 29 and 30 are arranged parallel to each other, the 4M fibers are stagnated at a position close to the non-electrode side wall surface and cannot be spun. This causes uneven thread thickness.

However, in this device, since both electrodes 29 and 30 are formed into arcuate surfaces convex inwardly, both electrodes 29 and 30 are
The strength of the electric field formed between 9.30 and 2000 is strong at the center and becomes weaker at both sides. Therefore, the aIi fibers F are attracted to the center side of the fiber supply channel by the gradient force, and quickly move to the exit side without stagnation near the wall surface of the fiber supply channel, and correspond to the suction port 6a of the suction vibro. The yarn is adsorbed and deposited on the outer surface of the perforated roller 13 in a direction parallel to its axis, that is, in a direction parallel to the line of yarn formation. The fiber bundle S attracted to a predetermined position of the perforated roller 13 is heated by being rolled by the friction between the perforated roller 13 and the non-perforated roller 11 with the axis of rotation parallel to the axis of the perforated roller 13 . Both rollers 11
, 13 is pulled out as a yarn Y by a pull-out roller 27, and wound up as a package P by a winding device 28. Therefore, unlike the conventional device, the fibers F are stretched and oriented in the axial direction of the perforated roller 13 and are adsorbed to the surface of the perforated roller 13 and subjected to a heating action, so that the parallelism of the fibers of the spun yarn is significantly improved. , the yarn appearance becomes uniform, yarn strength increases, and yarn breakage decreases.

Using the apparatus of this example, the distance between the two electrodes 29 and 30 was 45 mm, the bridge voltage was 20 mm, the opening roller width was 40 mm, and the flow velocity in the electric field channel was 10 m/sec.
c. When the spinning speed was set to 150 m/min and a yarn with a spinning count of Ne20 was produced using 100% cotton with an average fiber length of 281 I1 m and a maximum fiber length of 43 mm, the yarn was strong and well-balanced with few fiber bends. A thread was obtained.

In addition, in this embodiment, it is desirable that the distance between the pair of electrodes 29 and 30 disposed in the electric field channel portion be close to the maximum fiber length in order to arrange the fiber orientation. Since there is a risk of leakage if the length spans over , it is better to set it slightly longer. The effect was also observed when the distance between the electrodes was made 50 mm larger than the maximum fiber length.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, the curvature of the cross section of both electrodes 29, 30 may be made larger on the downstream side than on the upstream side. When formed in this manner, the closer the open fibers F moving within the fiber supply channel 20 are to the exit side of the fiber supply channel, the more likely they are to gather in the center of the fiber supply channel 20, and are deposited at a predetermined position on the perforated roller 13. It becomes easier to do. As shown in FIG. 5, when the distance between the electrodes 29 and 30 is narrowed on the exit side, the fiber F itself can be given a propulsive force in the exit direction by the gradient force.

Further, as shown in FIGS. 6(a) to <C), both electrodes 29.
The cross-sectional shape of 30 may be formed into a shape other than a circular arc. Further, the fiber spreading unit 26 may be formed of an insulating material such as plastic, or the portion of the fiber spreading unit 26 where the fiber supply channel 20 is formed may be formed of an insulating material such as plastic as shown in FIG. . When the entire fiber supply channel 20 is made of an insulating material such as plastic, the distance from the opening roller 22 to the part where both electrodes 29 and 30 are arranged can be further shortened, making the device more compact. can be converted into Furthermore, the connection between the ground terminal 31 and the high voltage side electrode terminal 32 with respect to both electrodes 29 and 30 may be reversed, or an electrode that generates a potential difference that can give sufficient orientation to the fibers may be connected in place of the ground terminal 31. Instead of arranging the non-perforated roller 11, both heating rollers may be configured with 1 to 4 perforated rollers 13 each having a suction vibro provided inside.

In addition, the present invention can be applied to a device in which the opening device is configured with a draft roller, the outer surface of the heating roller is formed by a hyperboloid, and the yarn is formed within the region of a slit formed between the hyperboloids. Any changes can be made within the scope of not deducting tax.

Effects of the Invention As detailed above, according to the present invention, the spread fibers moving in the fiber supply channel are blown away when passing through the channel portion where both electrodes are disposed, and the fiber forming line is The fibers are oriented parallel to each other, and in that state, they are adsorbed and deposited on the surface of the heating roller and heated by both rollers, which increases the parallelism of the fibers in the spun yarn and reduces yarn breakage during spinning, resulting in a uniform and beautiful yarn appearance. Moreover, it is possible to produce yarn with high yarn strength. In addition, since the distance between the two electrodes is formed so that it is smaller at the center than at both sides, a force acts on the fiber F passing between the two electrodes to move the fiber F toward the center of the electrode. Therefore, the spread fibers do not stagnate near the non-electrode side wall surface of the fiber supply channel, but quickly move to the exit side and are adsorbed and deposited on the heating roller, which prevents thickness unevenness from occurring in the spun yarn. Qin has an excellent effect of being able to prevent.

[Brief explanation of the drawing]

1 to 4 show an embodiment embodying the present invention, in which FIG. 1 is a sectional view taken along the line A-A in FIG. 2, FIG. 2 is a partially cutaway view, and FIG. The figure is an enlarged cross-sectional view taken along the line B-B in FIG. 2, FIG. 4 is a cross-sectional view taken along the line C-C in FIG. 1, FIG. C) is a cross-sectional view of a main part showing an example of a change in the cross-sectional shape of an electric bridge, FIG. 7 is a cross-sectional view of a main part showing another example of a change, FIG. 8 is a cross-sectional view of a conventional device, and FIG.
The figure is an enlarged sectional view taken along the line DD in FIG. 8, and FIG. 10 is a sectional view showing another conventional device. Non-porous roller 11, perforated roller 13, fiber supply channel 20, electrodes 2C1, 30, ground terminal 31, high voltage side mill terminal 32, spread fiber F, yarn Y0 Patent applicant Toyota Industries Corporation Representative Patent attorney Shien 1
) Hironobu Figure 5 Figure 7 Figure 6 (a) (b) (C)

Claims (1)

[Claims] 1. The spread fibers supplied through the fiber supply channel are delivered to at least one of the heating rollers in a wedge-shaped space formed by the surfaces of a pair of heating rollers that are arranged adjacent to each other and rotate in the circumferential direction. In an adsorption/heating spinning device in which fibers are adsorbed to fibers and subjected to a heating action to be spun as yarn, a pair of electrodes are provided in the fiber supply channel with electrode surfaces substantially parallel to the direction of fiber movement, and the shape of both electrodes is A fiber supply channel of an adsorption heating spinning device, characterized in that the distance between both electrodes is smaller at the center than at both sides. 2. The fiber supply channel of the adsorption heating spinning device according to claim 1, wherein both the electrodes are each formed to have an arcuate cross section. 3. The fiber supply channel of the adsorption heating spinning device according to claim 2, wherein both the electrodes are formed such that the curvature thereof increases toward the heating side.