JP2021075837A - Ring spinning machine and method for operating spinning unit of spinning machine - Google Patents

Abstract

To provide a ring spinning machine capable of easily producing yarns with particularly high yarn uniformity and very few yarn defects, and a method of operating a spinning unit of the ring spinning machine.SOLUTION: There is provided a spinning unit that comprises: a draft machine 1; a ring spinning machine 10; and a yarn guide element having a rotationally symmetric through opening for a yarn, in which the yarn guide element is rotatably located in an area of a spindle between a draft machine and an end of the spindle turned toward the draft machine about a longitudinal axis of the through opening, the yarn is in contact with an inside of the through opening by the rotating spindle of the ring spinning machine located downstream of the yarn guide element in a yarn running direction, and only the yarn rotates the yarn guide element based on a rotatable arrangement of the yarn guide element.SELECTED DRAWING: Figure 1

Description

The present invention is a method for operating a ring spinning machine having a plurality of spinning units arranged adjacent to each other and a spinning unit of the ring spinning machine.
-Draft device for drafting the sliver supplied to the draft device,
-A ring spinning device located downstream of the draft device, a ring spinning device equipped with a spindle for accommodating a cup for winding a sliver that is drafted to form a thread, and-yarn. A thread guide element with a rotationally symmetric through opening for use, which is rotatable about the longitudinal axis of the through opening in the region between the draft device and the end of the spindle facing the draft device. With respect to ring spinning machines and methods having yarn guide elements located in.

Ring spinning machines of the type described at the beginning are known, for example, based on Japanese Patent Application Publication No. 19909501. In a ring spinning machine, the sliver is turned into a thread, which is wound into a cup in a ring spinning machine. A ring spinning machine has a large number of spinning units, in which a large number of slivers are simultaneously converted into yarns, and these yarns are wound into a large number of cups. The main components of the spinning unit of a ring spinning machine are the draft device and the spindle of the ring spinning device. In the drafting device, the sliver is drafted so that the drafting device has at least one inlet roller pair and an outlet roller pair. The line of contact between the roller pairs forms a nip line through which the sliver is guided. One or more additional roller pairs may be arranged between the inlet roller pair and the outlet roller pair. Draft devices with a total of three or four roller pairs are common. Drafting or stretching of the sliver is achieved by the speed difference between the roller pairs.

On the downstream side of the outlet nipline of the outlet roller pair, the fibers of the sliver are twisted and thereby converted into yarn. The twist is created by the spindle, which rotates the cup (winding tube) from which the yarn is wound. A wide variety of yarn guide elements, such as displacement yarn guides, balloon limiting rings, and spinning rings, are known to guide the yarn from the outlet nipline to the cup and to properly wind the yarn into the cup. is there. These factors are in contact with the yarn and affect the growth of the twist in the yarn based on its friction, which further affects the spinning result.

German Patent Application Publication No. 2343776 discloses a spinning unit of a ring spinning machine with a yarn guide located above the spindle, which is rotatably supported by ball bearings. Has been done. The thread guide and the spindle each have a magnet assembly, which is formed such that the thread guide is entrained by a spindle that is rotated by the magnetic field of the magnet assembly. The thread guide rotates at a rotation speed equivalent to the rotation speed of the spindle. The additional twist is designed to prevent the occurrence of yarn breakage. Configurations with magnet assemblies are relatively expensive. The drive of the thread guide by the magnet assembly is premised on a constant distance between the spindle and the thread guide. Therefore, the thread guide cannot normally move up and down even when the thread guide is displaced. Magnet assembly, especially in the spindle, further complicates duffing.

Similarly, German Patent Application Publication No. 3021632 discloses a yarn guide for a spinning unit of a ring spinning machine, which is rotatably supported and driven to rotate. Such a yarn guide improves the uniformity of the yarn produced.

The yarn uniformity and reduction of yarn defects of the yarns produced are limited by known ring spinning machines and known methods for operating the spinning units of ring spinning machines, or other limitations. Requires an expensive structure to add. An underlying task of the present invention is a ring spinning machine and a method for operating a spinning unit of a ring spinning machine, which allows the yarn to be easily produced with particularly high yarn uniformity and very few yarn defects. Is to provide.

The present invention solves this problem by a ring spinning machine having the characteristics of claim 1 and a method for operating a spinning unit of a ring spinning machine having the characteristics of claim 7. Suitable developments of ring spinning machines are described in claims 2-6, which are dependent claims.

In the ring spinning machine according to the present invention, each spinning unit of the ring spinning machine has a yarn guide element having a rotationally symmetric through opening for the yarn, and the guide element is the longitudinal axis of the through opening. Rotatably centered on, it stands out because it is located in the area between the draft device and the end of the spindle facing the draft device. According to the present invention, in the yarn guide element, the yarn is in contact with the inside of the through opening of the yarn guide element by a rotating spindle arranged on the downstream side of the yarn guide element in the yarn traveling direction of the ring spinning device. , Only the thread is formed and arranged to rotate the thread guide element based on the rotatable arrangement of the thread guide element.

According to the present invention, the sliver drafted and advanced from the draft device is guided by a through opening of a yarn guide element on the upstream side of the inlet of the ring spinning machine. A rotating spindle of the ring spinning device located downstream of the yarn guide element in the yarn travel direction causes the yarn to contact the inside of the through opening and rotate the yarn guide element based on its rotatable arrangement. At this time, the rotation axis extends parallel to the thread runway. By collaborating with the yarn guided through the through opening, the yarn has a particularly high quality, especially a particularly high yarn uniformity, and has very few yarn defects. The high quality of the thread is produced by the interaction between the rotating inside of the through opening of the thread guide element and the thread guided through the through opening.

The present invention is further based on the recognition that it is not necessary to actively drive the rotatably arranged thread guide elements to obtain the desired thread uniformity. Rather, it is sufficient that the rotatable thread guide element is driven by the thread itself. No additional drive is required.

The configuration of the thread guide element and the through opening that is engaged with the thread is basically freely selectable. However, according to a particularly preferred configuration of the present invention, it has been proposed that the through-opening is tapered, at least partially, in the direction towards the spindle. According to this configuration of the present invention, the through opening has, for example, a hopper-shaped portion, in which the cross section of the through opening tapers along the traveling direction of the thread. The thread guide element may be formed such that the through opening is continuously tapered from the inlet opening of the thread guide element to the outlet opening of the thread guide element. Alternatively, however, the thread guide element may have a portion in which the cross-sections of the through openings remain equal in the direction of travel of the thread. The tapered portion ensures a particularly reliable rotation of the thread guide element around the thread, which ensures the interaction between the inside of the through opening and the thread, thus ensuring that the thread is of particularly high quality. Become.

The inner configuration of the through opening that engages the thread is also basically freely selectable. However, according to a particularly preferred configuration of the present invention, it has been proposed that the inside of the through opening has an annular protrusion. According to this configuration of the present invention, the inside of the through opening does not have a smooth surface, but one or one that protrudes toward the longitudinal axis of the through opening and is arranged coaxially with the longitudinal axis. It has a plurality of annular protrusions. Based on these protrusions, the yarn does not engage the entire inside of the through opening of the thread guide element, but merely contacts the protrusions in the region of the annular protrusions and extends between the protrusions. It does not engage with the inside of the through opening in the area of the recess. The partial interaction between the inside of the through opening and the thread created by the overhang results in a particularly high thread uniformity and a very small number of thread defects.

The configuration of the protrusions is basically freely selectable as in the number of protrusions. However, according to a particularly preferred configuration of the present invention, it has been proposed that the protrusions are formed by threads located inside the through openings. The use of threads to form the protrusions is outstanding due to the fact that such protrusions can be manufactured particularly easily and inexpensively. The number of protrusions extending across the entire inner circumference over the length of the thread can be determined particularly easily. According to a particularly preferred configuration of the present invention, up to six, preferably two to five, preferably three or four annular protrusions are provided.

Basically, the use of yarn guide elements according to the present invention in the area between the draft device and the ring spinning device already produces a particularly high yarn quality for yarns formed from sliver. According to a development of the present invention, it has been proposed that a displaced thread guide is arranged in the region between the thread guide element and the end of the spindle facing the draft device. The use of yarn guides, called yarn guides, which can move along the longitudinal axis of the spindle and therefore displace, supplementarily enhance the spinning geometry based on the torsion of the spinning geometry growing based on friction. ..

The rotatable arrangement of the thread guide elements is basically freely selectable. For example, the thread guide element can be used in a loose arrangement in its simplest configuration, where the thread is simply guided through a through opening. A member with a thread hole may be provided to avoid undesired movement of the thread guide element in the direction of the spindle, which member is located in the area between the draft device and the spindle. It prevents the thread guide element from moving in the direction to the spindle. When a displaced thread guide is preferably used, the thread guide element may be arranged such that the thread guide element is loosely in contact with the displaced thread guide.

However, according to a particularly preferred configuration of the present invention, it has been proposed that the thread guide element is rotatably arranged on the displaced thread guide. According to this configuration of the present invention, a support device is provided that rotatably supports the thread guide element in the displaced thread guide. The configuration of the support device is basically freely selectable, and particularly reliably guarantees the position-fixed arrangement of the yarn guide elements in the spinning unit. The displaced thread guide can move along the longitudinal axis of the spindle. The movement is related to the cup structure and affects the thread balloon formed by the rotating thread, which in turn can optimize the thread geometry. By incorporating a rotatable thread guide element within the displaced thread guide or in contact with the displaced thread guide, or by forming the rotatable thread guide element as a displaced thread guide, two functions are provided: thread. Uniformity and adjustment of the thread balloon can be combined into one with each other.

In the case of a preferred configuration of a thread guide element with a tapered through opening and the resulting hopper shape, for example, in the thread hole of the thread guide where the thread guide element is displaced in the area of the hopper-shaped portion. Arrangements that are loosely rotatably supported may be proposed. Alternatively, it may be arranged not only on the thread guide element but also on the thread guide displaced by the rolling bearing.

According to the method according to the invention for operating a spinning unit of a ring spinning machine, a sliver is supplied to the draft device, drafted in the draft device, and then the drafted sliver is drafted after advancing from the draft device. It has been proposed to supply to a ring spinning device located downstream of the device, change the sliver drafted in the ring spinning device into yarn, and wind it up in a cup placed on the spindle. According to the present invention, the yarn is guided downstream of the draft device through a rotationally symmetric through opening of the thread guide element, which is the end of the draft device and the spindle directed at the draft device. In the area between them, they are rotatably arranged about the longitudinal axis of the through opening.

A rotating spindle twists the drafted sliver, which is spun into yarn, which is then wound up in a cup placed on the spindle. The rotating spindle brings the yarn into contact with the inside of the through opening of the yarn guide element, rotating the yarn guide element, with the axis of rotation oriented parallel to the traveling direction of the yarn. Based on the interaction between the inside of the yarn guide element and the yarn, a particularly high yarn quality with high yarn uniformity and slight yarn defects is produced.

Next, examples of the present invention will be described with reference to the drawings.

It is a perspective view which shows schematic arrangement form of the draft apparatus and the ring spinning apparatus arranged downstream. It is a perspective view which shows the displaceable yarn guide which is arranged in the region between a draft apparatus and a spinning apparatus, and includes the yarn guide element of 1st Embodiment. It is a perspective view which shows the displaceable thread guide shown in FIG. 2 together with the thread guide element of the 2nd Embodiment arranged in this thread guide. It is a perspective view which shows the thread guide element shown in FIG. It is a perspective view which shows the thread guide element shown in FIG.

FIG. 1 schematically shows a draft device 1 of a spinning unit of a ring spinning machine and a ring spinning device 10 arranged on the downstream side of the draft device 1, and the ring spinning machines are arranged side by side with each other. It has a large number of spinning units driven by a central drive unit. The main component of the spinning unit is a spindle for accommodating the draft device 1 and the cup 12.

The draft device 1 has four roller pairs in the illustrated embodiment, that is, an inlet roller pair, an intermediate roller pair 4, an outlet roller pair 3, and a focusing device transfer roller pair 2, which are not shown. The roller pairs 2, 3 and 4 are composed of top rollers 2a, 3a and 4a and bottom rollers 2b, 3b and 4b, respectively. Therefore, the intermediate roller pair 4 is composed of an intermediate top roller 4a and an intermediate bottom roller 4b. The intermediate top roller 4a and the intermediate bottom roller 4b are each surrounded by a draft apron. The outlet roller pair 3 has an outlet top roller 3a and an outlet bottom roller 3b, and the outlet top roller 3a and the outlet bottom roller 3b form a nip line at the contact line thereof. The transport roller pair 2 of the focusing device includes a transport top roller 2a surrounded by a focusing apron and a transport bottom roller 2b. The transfer top roller 2a and the transfer bottom roller 2b form a nip line in the same manner, and in the illustrated embodiment, also form an anti-twist gap, and the ring spinning apparatus 10 reaches the anti-twist gap. The twist created by the spindle of the is grown. If no focusing device is provided, the anti-twist gap will be formed by a pair of outlet rollers.

The bottom rollers 2b, 3b, and 4b are each driven via one common shaft. The top rollers 2a, 3a, 4a are rotatably supported by the holding / pressing arm and are pressed against the bottom rollers 2b, 3b, 4b. At this time, the top rollers 2a, 3a, 4a are interlocked by frictional coupling. Coming from a flyer bobbin not shown here, the sliver first passes through the inlet nipline between the inlet top roller and the inlet bottom roller. The sliver then passes through the intermediate rollers vs. 4 and the outlet rollers vs. 3. When passing through the nip line between the transfer top roller 2a and the transfer bottom roller 2b, the sliver advances from the draft device 1. The sliver is drafted in the draft device 1. The twist to make the sliver yarn is added downstream of the anti-twist gap.

A cup 12 is arranged on the spindle. The thread passes upstream of the cup 12 through the tail 8 of the displaced thread guide 5 that forms the thread hole, and the thread guide 5 is machined through the accommodation opening 6 of the fixing ring 17 arranged in the holding portion 7. Arranged in an elevating device extending in the length direction, the displaced thread guide 5 can be moved along the longitudinal axis of the spindle. Further, a balloon limiting ring 11 is provided, and the balloon limiting ring 11 is arranged on the holding body 15. The balloon limiting ring 11 limits the thread balloon formed when the thread is wound. A ring rail (not shown) moves up and down along the spindle with the formation of the cup. On the ring rail, one spinning ring 13 is arranged corresponding to the spinning unit. In the spinning ring 13, the ring traveler rotates during the spinning operation, and the ring traveler is driven by the rotating thread balloon. The yarn is twisted by a cup 12 that rotates on a spindle. The twisting grows up to and stops at the anti-twisting gap of the draft device 1.

In the region between the ring spinning device 10 and the draft device 1, yarn guide elements 9a and 9b provided with through openings for accommodating yarns are rotatably arranged. In the embodiments shown in FIGS. 2 and 3, the thread guide elements 9a and 9b are loosely mounted on the tail 8 of the displaced thread guide 5. The rotating spindle causes the yarn to come into contact with the inner surfaces 18a and 18b of the through openings of the yarn guide elements 9a and 9b to rotate the yarn guide elements 9a and 9b. At this time, the rotation axis is parallel to the thread runway. In the embodiments shown in FIGS. 2 and 4, the thread guide element 9a has a hexagonal nut-like shape on the outside when viewed in cross section. The thread guide element 9a is loosely mounted on the tail 8. The thread guide element 9a has four protrusions 19 on the inner side 18a that project inward in the direction of the thread, and these protrusions 19 are formed by female threads 20.

In the embodiment shown in FIGS. 3 and 5, the thread guide element 9b has a conical portion 21 connected to a cylindrical portion, which causes the through opening to taper in the direction of the thread runway. .. The inner 18b of the thread guide element 9b also has a protrusion 19 formed by a thread 20 on the upper portion of the thread guide element 9b at the position of use. A conical portion 21 is connected to the cylindrical portion.

1 Draft device 2 Conveying roller vs. 2a Conveying top roller 2b Conveying bottom roller 3 Outlet roller vs. 3a Outlet top roller 3b Outlet bottom roller 4 Intermediate roller vs. 4a Intermediate top roller 4b Intermediate bottom roller 5 Displaced thread guide 6 Storage opening 7 Holding part 8 Tail 9a, 9b Thread guide element 10 Ring spinning device 11 Balloon limiting ring 12 Cup 13 Spinning ring 15 Holder 16 Opening 17 Fixing ring 18a, 18b Inside 19 Protrusion 20 Thread 21 Conical part

Claims (7)

A ring spinning machine having a plurality of spinning units arranged adjacent to each other.
-Draft device (1) for drafting the sliver supplied to the draft device (1),
-A spindle containing a cup (12) for winding the sliver, which is a ring spinning device (10) arranged on the downstream side of the draft device (1) and is drafted to form a yarn. A ring spinning apparatus (10) comprising, and a yarn guide element (9a, 9b) having a rotationally symmetric through opening for the yarn, the draft apparatus (1) and the draft of the spindle. Thread guide elements (9a, 9b) rotatably arranged about the longitudinal axis of the through opening in the region between the end facing the device (1).
In a ring spinning machine that has
The yarn is in contact with the inside of the through opening by the rotating spindle of the ring spinning apparatus (10) arranged on the downstream side of the yarn guide elements (9a, 9b) in the yarn traveling direction. A ring spinning machine characterized in that only the yarn rotates the yarn guide elements (9a, 9b) based on a rotatable arrangement of the yarn guide elements (9a, 9b). The ring spinning machine according to claim 1, wherein the through opening is tapered at least partially in a direction toward the spindle. The ring spinning machine according to claim 1 or 2, wherein the inside (18a, 18b) of the through opening has an annular protrusion (19). The ring spinning machine according to any one or a plurality of claims 1 to 3, wherein the protruding portion (19) is formed by a screw thread (20). Claim that the thread guide (5) to be displaced is arranged in the region between the thread guide elements (9a, 9b) and the end of the spindle facing the draft device (1). The ring spinning machine according to any one or more of the items 1 to 4. The ring spinning machine according to any one or more of claims 1 to 5, wherein the yarn guide elements (9a, 9b) are rotatably arranged on the displaced yarn guide (5). A method for operating a spinning unit of a ring spinning machine according to any one or more of claims 1 to 6.
-A sliver is supplied to the draft device (1) and drafted in the draft device (1).
-The drafted sliver is supplied to the ring spinning device (10) arranged on the downstream side of the draft device (1) after advancing from the draft device (1), and the ring spinning device (10) is supplied. ), A thread is formed from the sliver drafted in), the thread is wound on a cup (12) arranged on a spindle, and-the thread is downstream of the draft device (1) and a thread guide element (9a). , 9b) guide through the rotationally symmetric through openings, the thread guide elements (9a, 9b) are of the draft device (1) and the end of the spindle directed at the draft device (1). In the area between them, they are rotatably arranged about the longitudinal axis of the through opening.
In the method
The rotating spindle of the ring spinning apparatus (10) arranged on the downstream side of the yarn guide elements (9a, 9b) in the yarn traveling direction brings the yarn into contact with the inside of the through opening. A method characterized in that only the yarn rotates the yarn guide elements (9a, 9b) based on a rotatable arrangement of the yarn guide elements (9a, 9b).

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