JPS5944405B2 - Open-end spinning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an open-end spinning device, and in particular to two rollers, a fiber feeding duct for feeding fibers to a throw formed between these two rollers, and a fiber feeding duct for twisting fibers in the throat. The present invention relates to an open-end spinning device comprising: a rotating device for rotating the roller to form a yarn; and a device for drawing out the yarn along the throat.

In one known embodiment of this type of open-end spinning device, the fibers are fed into a throat formed between adjacent cylindrical surfaces of two parallel co-rotating rollers or drums. Ru.

Frictional contact with the rotating drum surface twists the fibers within the throat to form a yarn, which is then drawn in a direction transverse to the direction of motion of the drum surface.

In another known embodiment, the fibers are fed onto a moving perforated belt, and the fibers on this perforated belt are maintained in a yarn-forming zone formed by suction nozzles arranged below the belt. , the moving bell H is twisted (twisted) into yarn.

The yarn is then drawn in a direction transverse to the direction of movement of the belt.

A problem that arises with this type of open-end spinning device is that the suction at the trailing end of the spun yarn to combine the fibers into yarn is undesirable.

One example for achieving the most advantageous adsorption of fibers is described in British Patent No. 1,524,659.

This patent describes an apparatus comprising two closely spaced perforated suction drums that rotate in the same direction and form a throat between each other. A fiber feeding device feeds fibers into the throat to form yarns.

In the path of the fibers between the fiber feeder and the throat there is interposed a disk having teeth, the disk being arranged for rotation in a plane transverse to the direction of fiber travel.

That is, the fibers are deflected by the teeth of this rotating disk and are oriented in a direction parallel to the direction of travel of the displaced yarn.

The disadvantage of this solution is that some of the fibers become wrapped around the teeth and become out of the mainstream of the fibers, which is unacceptable.

According to this solution, it is not possible to place the rotating disk close to the yarn forming area due to the physical limitations imposed by the rotating drum.

Therefore, after contacting the teeth of the disk, the fibers lose their parallel orientation before reaching the yarn forming zone.

Furthermore, the provision of the rotating disk requires a separate drive device, which complicates the device and increases the cause of failures in the overall device.

Yet another known proposal, DE 2 809 599, describes a detailed open-end spinning device of this general type, in which the yarn is spun into a multi-stranded yarn. No particular reference is made to issues relating to the proper orientation of the material.

According to the present invention, two rollers are mounted, and the two rollers are mounted to rotate about their respective axes, and an elongated throat is formed between the outer circumferential surfaces of these rollers and located at their nearest line. a mounting device, one of the rollers having a perforated surface and air flow generating means for allowing air to flow through the perforated surface, and the other of the rollers having a non-porous surface. further comprising: a fiber feeding duct for feeding the fibers so that they enter the throat; and a rotating device for rotating the rollers to twist the fibers in the throat to form a yarn. and a device for drawing the yarn along the throat, the two rollers being arranged such that the perforated surface moves into the throat and the non-porous surface moves out of the throat. An open-end spinning device is provided, characterized in that the fiber feeding duct extends into the throat.

The invention will be explained in more detail with reference to Example 0 shown in the accompanying drawings.

The apparatus includes a pair of parallel closely spaced drums or rollers 1 and 2.

The surface of the roller 1 includes a perforated area as shown in FIG. 1p, which area is crosshatched in FIG.

The roller 2 is made of a circular metal core 41 made of an elastic material, preferably natural rubber, polyurethane, or adiprene.
rene), caprolactone (capr-olacto)
A cylindrical shell or covering 5 of natural or synthetic rubber such as n) is glued.

The thickness of the shell is on the order of 21n11L and the hardness of the material is in the range 40-90 Shore A, most preferably 60 Shore A.

The outer peripheral surfaces of the rollers 1 and 2 form a gap between each other,
This gap tapers to a narrow throat at the closest approach position.

The cylindrical core 4 of the roller 2 is supported by a pair of ball bearings 6, and is configured to freely rotate around a shaft 7 supported by the bearings 6.

This shaft is itself rigidly supported in respective bores formed in a pair of arms 8, 9, which arms are pivotally connected to a bar 10 as shown in FIG. 8,9 around which the roller 2 can pivot around the bar 10 to increase or decrease the gap between the rollers 1 and 2.

The roller 1 comprises a perforated cylindrical part 3 and unperforated extensions 11 and 12 which serve to support and provide rigidity to this cylindrical part 3.

A suction tube 13 is attached to the inside of the roller 1, and this tube is long and thin so as to form a close gap between the roller and the roller, ranging from a few tenths of a millimeter to a few hundredths of a millimeter (several tenths of a fin). The roller includes a cylindrical part, and the roller is a tube '1.
It can be rotated freely around 3.

This tube 13 has a slot 14 adjacent to the throat between rollers 1 and 2, so as to communicate the suction within the tube 13 to the throat as will be described below.

The tube 13 has one end connected to a bore 14 formed in the support 15.
' and is rigidly attached to the support 1.
5 is fixed to a machine frame 16, and the one end of the tube 13 is in contact with this machine frame 16.

The bore 14' is open at its end to form a cylindrical space 17 and is adapted to form a housing for a bearing 18 rotatably supporting one end of the perforated roller 1.

The other end of the tube 13 is closed and has a reduced cross-sectional area to form a boss 19 on which a bearing 20 is supported to allow the reduced diameter portion 21 of this end of the roller 1 to rotate. I am starting to support it.

The interior of tube 13 communicates with a suction source 22, which includes a duct extending through machine frame 16.

One drive of rollers 1 and 2 is provided by a motor (not shown) which is pivotally connected to one end of a countershaft 23 which is rotatably supported by a pair of bearings 24 mounted within a housing 25. ing.

The other end of the countershaft is timing belt pulley 2
I support 8.

A timing belt 27 is wound around a pulley 26 and around a timing belt pulley 28, as best shown in FIG.
8 is supported by a spigot 29 extending inside the cylindrical core 4 of the roller 2.

The tension pulley 30 engages the timing belt 27 so as to produce the proper drive tension on the timing belt 27 even with different dimensions of the boolean IJ 26, thereby allowing different speed ratios of the rollers to be obtained. There is.

A pulley 26 and a housing 2 are attached to the counter shaft 23.
Further, another timing pulley 31 is supported at an intermediate portion between the timing pulley 5 and the timing pulley 31.

This pulley 31 is attached directly below a timing belt pulley 32, and the pulley 32 is fixedly attached to the outer peripheral surface of the roller 1 at a position close to the bearing 18.

Pulleys 31 and 32 are operatively connected by a timing belt 33.

1 driving force from the main motor (not shown) is transmitted to the countershaft 23, which causes the pulleys 26 and 31 to cause the respective belts to rotate the rollers 1, 2 in one direction Fl, that is, in the counterclockwise direction as viewed in FIG. Rotate to drive.

The rotation of the rollers 1 and 2 is such that the outer circumferential surface of the roller 2 with the coating 5 moves from the throat towards the side closer to the fiber feeding duct 41 and the outer circumferential surface of the roller 1 with the perforated portion 3 It moves from the side closer to the fiber feeding duct 41 toward the throat.

The fiber feeding device, generally designated 34, includes a sliver feeding roller 35, a feeding pedal 36, and a beater 3 mounted on a shaft 38 for rotation within a housing 39.
Contains 7.

The housing 39 has an opening 40 through which impurities can be discharged.

This type of fiber feeding device 34 is well known as an open-end spinning device of the spinning rotor type, an embodiment of which is described in detail in British Patent No. 1,368,886.

The fibers are fed from the fiber feeding device 34 to a throat formed between the outer peripheral surfaces of the rollers 1 and 2 by a fiber feeding duct 41.

The fiber feeding duct 41 comprises a first duct portion 42 having a fiber inlet opening communicating with a rectangular passage provided in the housing, and a second duct portion 42 terminating in an elongated mouth 45 in the throat. It has a nozzle 44.

The first duct section 42 has a modified rectangular cross section formed by two side walls 46, and the first duct section 42 has a modified rectangular cross section formed by two side walls 46.
2 approaches the throat (gradually narrowed by the front wall 47 and rear wall 48).

The longitudinal axis of the first duct part 42 is at an angle of 20° to 45° to the axis of the rollers 1, 2, preferably 25°.
It is tilted at an angle of ~30°.

At the junction of the first and second duct sections 42,44, the front wall 47 terminates in an air channel or duct 49, which communicates with the terminal duct section 44 for purposes described below. There is.

The duct 49 runs from the terminal duct portion 44 to the roller 1,
2 and is connected to a suction source generally indicated at 50.

The walls 47, 48 of the first duct section are sharply redirected to form walls 51,52 of the terminal duct section 44.

The terminal duct portion 44 is widened near the mouth 45 , the rear wall 51 extends from the mouth of the suction duct 49 to a position corresponding to one end of the slot 14 , and the front wall 52 extends from the other end of the slot 14 . It is angled to extend to.

Thus, the mouth 45 extends as a narrow slot along substantially the entire length of the slot 44 and the slot 14
The area of the mouse that communicates with the mouse is maximized.

The ends of wall 52 are spaced further along the axis of the yarn than the imaginary end of wall 47 that would intersect mouse 45.

For a feed duct with an angle of inclination of the first part 42 of 25°, the distance between this virtual point and the end of the wall 52 at the mouse is found to be 25 mrn.

The duct 49 has an upper wall 53 and a lower wall 54, which widen as the duct extends away from the interior of the fiber feeding duct 41.

The lower wall 54 extends slightly upwardly as it approaches the front wall 52 and is connected to the front wall to form a baffle.

This baffle is located below top wall 53 at a location offset from the junction between walls 47 and 53.

A slow H′i yarn forming region is formed, in which the fibers are twisted by the rotation of rollers 1 and 2, and r
The yarn is drawn out along the throat in the axial direction of the rollers 1 and 2 by a pair of drawing rollers 55.

These pull-out rollers are arranged on the side opposite to the fiber feeding duct 41 with respect to the suction duct 49, and the yarn is wound up as a package 55a.

This rotation, in which roller 1 moves into the throat and roller 2 moves out of the throat, involves two rollers, one roller of non-suction or perforated construction and one perforated suction roller. It has been found that improved twisting efficiency can be obtained compared to perforated rollers.

The rollers provide high twisting efficiency and provide axial movement of the yarn without creating unacceptably high tension levels in the yarn.

Rotation of the rollers is important in providing proper balance of yarn within the throat.

The yarn draw-off tube 56 extends from the frame wall 57 to which it is fixedly attached to a position in close proximity to the ends of the rollers 1,2.

In operation, the sliver "S" is advanced between the nip formed between the feed roller 35 and the feed pedal 36;
It is subjected to the opening and plowing action performed by the nirards or teeth formed on the outer circumferential surface of the beater 37.

The opened fibers are sent onto the outer peripheral surface of the beater 37 to the entrance of the fiber feeding passage 43, where they are removed from the beater 37.

Impurities are removed through opening 40.

In this passageway 43 the fibers ride an air flow guided by a suction source connected to the interior of tube 13 by duct 22 .

This suction source is in communication with the passageway 43 through the slot 14, the perforated portion 3, the mouth 45 and the fiber feed duct 41.

After passing through the passage 43 the fibers are carried along the first duct section 42 by the air stream I.

In this first duct section 42, the fibers are substantially aligned in the direction of the airflow, ie at an angle of about 25 DEG to the axis of the rollers 1.degree. 2, in a direction opposite to the direction of yarn withdrawal.

At the end of the first duct section 42 the fibers become subject to the suction action which is led through the suction duct 49.

This suction effect causes the airflow to occur in a direction substantially parallel to the axis of the yarn.

This air flow is not disturbed by any other additional air flow directed into the feed duct, resulting in a non-turbulent, uniform flow.

This air flow changes the total air flow rate and the direction of motion of at least some of the air flowed fibers.

The feed tube 41 therefore feeds the fibers directly towards the bottom of the throat, i.e. directly into the yarn forming area;
From this region the yarn is also drawn off in a direction (approximately parallel to the axes of the rollers 1.about.2).

The fact that wall 52 is spaced further in the axial direction of the yarn than the imaginary extension of wall 47 creates a chamber that allows suction through mouth 45 to bend and draw out the fibers.

However, if the axial spacing of the walls 52 is too wide, excessive bending effects will occur and proper effectiveness will be compromised.

In this way, the likelihood that the fibers will be incorporated into the trailing end of the spun yarn IYJ aligned or nearly aligned with the axis of the yarn rYJ is increased.

The baffles formed by walls 52 and 54 serve to prevent air flow in tact 49 directly from the air flow through mouth 45 and thereby prevent air flow through suction duct 49.
This serves to prevent the fibers from being dislodged from the yarn-forming area by the suction airflow generated within.

The suction duct 49 communicates with the end duct section 44 near the trailing end of yarn "Y".

This means that the suction action from the duct 49 has at least an effect on the fibers forming the core of the yarn, so that when these fibers are combined they are in a position substantially parallel to the axis of the yarn. We are making sure that we have the potential to do so.

Since the core fibers of yarn "Y" have a significant effect on the strength of the yarn, it is important that these fibers be incorporated into the yarn in a satisfactory manner.

Furthermore, it is important that the suction forces transmitted from the suction duct 49 and the suction slot 14 act on the fibers in a balanced manner.

Not only the suction force from the duct 49 but also the slot 1
The strength must be adequate so as not to completely overcome the effect of the suction force acting on the fibers from 4.

Otherwise, the yarn that can be used is duct 4
It will be pulled out through 9.

However, the suction force from duct 49 must be of sufficient strength to change the direction of the fibers so as to be substantially or approximately parallel to the axis of the yarn.

In reality, vacuum is drawn through the tube 13 at a rate of about 0.9o6m'/min (32ft3/min) and 0.283m
It has been found that drawing a vacuum through the duct 49 for about 7 minutes (10 ft 27 minutes) creates a suitable balance.

The duct 49 is configured to be proximate to the mouth 45 and the throat and configured to act on the fibers so as to occlude the mouth as much as possible without blocking airflow through the mouth, thereby removing the fibers. Ru.

The fibers in the feed duct pass through slot 1 in the mouth 45.
When made to be directly affected by the suction force through 4,
It is ensured that it has a tendency to bend 25° from the feeding direction towards the vertical direction.

The creation of an additional air flow provided by the duct 49 across the mouth 45 counteracts this tendency and changes the orientation of the fibers to a transition angle that is closer to parallel to the yarn axis than in the absence of this. and then move to the wall 52.

Possibly, but less desirably, the fiber feed duct 41 could be tilted in the opposite direction to that shown in FIG.

In the construction in such an embodiment, the inclination of the longitudinal axis of the first duct part is 2.2 with respect to the axis of the roller 1.2.
5°, and the fiber feed airflow flowing along this section carries the fibers in the same direction as the spun yarn IYJ.

The suction duct 49 can communicate with the fiber feed duct 41 through the wall close to the draw roller, thereby acting on the fibers and orienting them in a direction substantially parallel to the axis of the spun yarn. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional plan view of an open-end spinning device according to the invention taken along line 1--1 in FIG. FIG. 2 is a cross-sectional view taken along line -H in FIGS. 1 and 3. FIG. 3 is only for showing one drive structure of drum 1 and drum 2, the second one is shown with roller 1 removed for clarity.
FIG. 2 is a partial schematic side view of the apparatus shown in FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. FIG. 5 is a partial plan view of the open-end spinning device showing details of the initial roller structure. 1.2...roller, 3,5...yarn forming surface, 8.9...arm, 13...
Suction tube, 14...Slot, 22...
... Suction source, 34... Fiber feeding device, 35.
...Feeding roller, 36...Feeding pedal,
3γ... Beater, 41... Fiber feeding duct, 42... First duct portion, 44...
... Sake 2 duct part, 45 ... Mouse, 47
, 48...Wall, 49...Duct, 50
... Suction source, 51, 52 ... Wall, 53
．． 54...Wall, 55...Drawer roller.

Claims (1)

[Scope of Claims] A device comprising: 12 rollers; the two rollers are mounted to rotate about their respective axes; and an elongated throat is formed between the outer circumferential surfaces of these rollers and located at the line closest to the rollers. a racking device, one of said rollers having a perforated surface and having air flow generating means for allowing air to flow through said perforated surface, and the other of said rollers having a non-porous surface; a fiber feed duct for concatenating the fibers so that they enter the throat; a rotating device for rotating the rollers to twist the fibers in the throat to form a yarn; and a device for drawing out the material along said throat, said two rollers 1, 2 being arranged such that the perforated surface 3 moves into said throat and the non-porous surface 5 moves out of said throat. An open-end spinning device characterized in that the fiber feeding duct 41 extends into the throat. 2. An open-end spinning device according to claim 1, wherein the non-porous surface 5 is made of an elastic material. 3. The open-end spinning device according to claim 2, wherein the elastic material is made of natural or synthetic rubber. 4. An open-end spinning device according to claim 2 or 3, wherein the elastic material has a hardness in the range of 40 to 90 Shore A. 5. The open-end spinning device of claim 4, wherein the elastic material has a Shore A hardness of 60.