JP2002309452A - Spinning machine having plural spinning stations - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent formation of fiber accumulation on the inside of a transporting belt. SOLUTION: This spinning machine comprises plural spinning stations. Each of these spinning stations comprises a drawing device 4 and a condensing zone 6 arranged in the downstream and the condensing zone 6 condenses a drawn fiber strand 5. Each condensing zone 6 comprises a circulating air-permeable transportation belt 16 and the transportation belt 16 is guided on a slide surface containing a suction slit 20. Each slide surface 17 is arranged on a suction tube 18 extending along plural spinning stations and each slide surface 17 has a cover 30. The transportation belt 16 transports the fiber strand 5 beyond a nip line 24 bounding the condensing zone 6 to a separation point. The transportation belt 16 is guided without any support on a recessed place 35 immediately downstream of the separation point. The recessed place 35 continues every two spinning stations in the form of open groove and the groove can approach a transfer blower.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] Background of the Invention and Summary The present invention is a spinning machine having a spinning stations disposed more adjacent to, on what mobile blower is operated thereon. Each spinning station includes a drawing device having a pair of forward rollers and a condensing zone for condensing the drawn fiber strands, each condensing zone being guided on a slide surface arranged on a suction tube and circulating including a suction slit. An air permeable transport belt, the slide surface being covered by a cover in the area of the suction slit, said transport belt transporting the fiber strands to a separation point beyond a nip line bounding the condensation zone;
And moves without any support over a recess at a distance from the separation point of the suction tube extending along the plurality of spinning stations.

[0002] The fiber strands drawn in the drawing device of the spinning machine are subsequently subjected to spinning. If this were applied directly after the drawing process, a so-called spinning triangle would occur at the front roller pair of the drawing device. The spun triangles contain side fibers which are not properly bonded in the twisted yarn. In order to avoid this disadvantage, a so-called condensation zone has recently been arranged downstream of the stretching device. The disadvantageous spinning triangles are no longer present when the fiber strands that have been drawn but not yet twisted in this condensing zone are bundled or condensed by the lateral assembly of the single fibers, so that further nip lines are applied. When the condensed fiber strand then undergoes its spinning, a yarn is created, which is less fuzzy, smoother and more tear resistant than regular yarn.

[0003] Spinning machines of the type described above are prior art in German published patent application 1992261. In this spinning machine, the individual condensing zones in the region of the suction slit are protected by a cover, so that the blower traveling along the length of the spinning machine does not interfere with the fiber strands to be condensed. In particular, it is stated that fiber accumulation forms in the region between the inside of the transport belt and the stationary slide surface, which should be avoided as far as possible. In addition to cleaning the outside of the transport belt, various measures are also provided, for example, the contouring of the outer contour of the suction tube, which also cleans the inside of the transport belt. Cleaning of the outer side of the transport belt occurs when the circulating transport belt contacts the driven bottom roller of the forward roller pair. Since the transport belt and the bottom cylinder move in opposite directions at the point of contact, the cotton wool can be removed from the outside of the transport belt in this manner. At the point of contact, the known suction tube has a recess, which is a particularly dangerous area, since this recess is provided immediately upstream of the point where the transport belt moves on the slide surface. Proven. Fiber debris scraped off by the irregular shape of the suction tube inside the transport belt accumulates in the area of the above-mentioned recess and remains there. Fiber accumulation at this hazardous location leads to a loss of the spinning process, especially to a reduction in the condensation effect due to the blocking of the holes in the transport belt over time.

It is an object of the present invention to prevent as much as possible the formation of fiber accumulation inside the transport belt.

This object has been achieved according to the invention in that a recess is provided immediately downstream of the separation point and continues between each spinning station as an open groove accessible to the moving blower.

[0006] The open groove allows access to the moving blower between the spinning stations from the operator's side. Between the spinning stations, a moving blower can blow a stream of air into the groove, which is deflected axially and directed under the transport belt through the groove, i.e. to the above-mentioned recess. In this way, the interior of the entire transport belt is cleaned during the spinning process in the area of the recess shortly after release from the slide surface of the transport belt. In order to prevent fiber particles from penetrating into adjacent spinning stations, a fiber fly waste exclusion limiting surface can be provided in the open groove between the two spinning stations. A suction tube extending across a plurality of spinning stations can be provided with a profiled extension for the recess. This profile extension then simultaneously forms a recess in each individual spinning station as well as an open groove between the two spinning stations.

In order to guide the transport belt over the recess,
The suction tube can comprise two shells for guiding the transport belt to the spinning station, these shells being located at a distance from each other in the recess. This distance ensures that the inside of the transport belt is not supported in the area of the recess. This embodiment has the further advantage that the suction tube can be arranged at a defined distance from the forward roller pair of the stretching device, and that the shell includes a sliding surface, bridging the gap between the suction tube and the forward roller pair. Have. In this manner, the slide surface extends in close proximity to each forward roller pair in the desired manner, while the suction tube has a sufficiently large distance from the drive bottom cylinder between every two spinning stations, and the moving blower also has this area. Can be cleaned.

[0008] These and further objects of the simplified description of the invention The drawings, features and advantages will become more readily apparent from the following detailed description taken in conjunction with the accompanying drawings. In the drawings: FIG. 1 is a partial cross-sectional side view of the region of the condensing zone of the spinning station, FIG. 2 is a diagram of the condensing zone in the direction of arrow II in FIG.
3, where some elements, in particular the pressure roller, have been omitted, and FIG. 3 is a view of the condensation zone in the direction of arrow III of FIG. 1, where again some elements have also been omitted.

DETAILED DESCRIPTION OF THE DRAWINGS The spinning machine according to FIGS . 1 to 3 is preferably a ring spinning machine. It comprises, in a conventional manner, a plurality of adjacently arranged spinning stations in the machine direction, of which three spinning stations 1, 2 and 3 are visible.

Each spinning station 1, 2, 3,... Includes, among other elements, a drawing device 4, only the end region of which is shown in FIG. 1, and a drawn but untwisted fiber strand. A condensing zone 6 is shown, which bundles 5 is arranged downstream of the stretching device 4. The remaining elements of the spinning stations 1, 2, 3, ... are not shown. Each stretching device 4 includes, in particular, a front roller pair 7 as well as an apron pair arranged upstream thereof, the apron pair including a bottom apron 8 and a top apron 9. The remaining roller pairs of the stretching device 4 are not shown.

The front roller pair 7 includes a driven bottom cylinder 11, which extends over a plurality of spinning stations 1, 2, 3,.
Has a waveform region 12 in a known manner. At each of the spinning stations 1, 2, 3,..., A pressure roller 13 is arranged in a known manner against the corrugated area 12 of the bottom cylinder 11, where the pressure rollers 1 of two adjacent spinning stations are arranged.
3 can be combined to form a so-called pressure roller twin.

The front roller pair 7 has a front nip line 14.
This nip line ends the stretching zone of the stretching apparatus. The fibrous material 15, for example sliver or roving, fed in the drawing device 4 is fed in a known manner in the transport direction A.
It is stretched to the desired degree. The stretching process essentially ends at the front nip line 14.

For the reasons mentioned above, the condensation zone 6 is arranged downstream of the drawing device 4 in which the untwisted fiber strands 5 are bundled or condensed by the transverse collection of the single fibers. .

Each condensing zone 6 includes a circulating air permeable transport belt 16 which conveys the fiber strands 5 to be condensed through the condensing zone 6. The transport belt 16 is preferably a thin, closed-meshed woven belt, where air permeability occurs due to the structure of the belt. The transport belt 16 is guided on a slide surface 17, which is formed by the outer contour of a suction tube 18 extending along a plurality of spinning stations 1,2,3. The suction tube 18 is connected to the low-pressure conduit 1.
9 is connected to a low pressure source (not shown).

In the slide surface 17 of each of the spinning stations 1, 2, 3 a suction slit 20 is provided which is arranged slightly transversely in the direction of travel B of the transport belt 16 and consequently collects laterally. It comprises an edge 21 along which the condensed fiber strand 5 moves. At this gathering edge 21, the fiber strands 5 are condensed by the transverse aggregation of the single fibers, whereby the fiber strands 5 are additionally lightly twisted. This increases the condensation effect. The transport belt 16 has a tensioning element 2 at a distance from the suction slit 20.
Guided through 2.

At the end of the condensation zone 6, a nip roller 23
Which drives the transport belt 16 and forms a nip line 24 with the slide surface 17, the suction slit 20 extending to the nip line, the nip line forming a twist disturbance with respect to the spinning twist. Immediately downstream of the nip line 24, a yarn 25 is then made, which leaves the slide surface 17 at a separation line 36 and is then fed in the delivery direction C to a twisting element, for example a ring spindle. A nip roller 23 prevents the spinning twist applied to the yarn 25 from going back into the condensation zone 6. The drive of the nip roller 23 is shown only in dash-dotted lines, and the nip roller 23 operates a toothed belt 26 designed to have a slightly higher peripheral speed than the pressure roller 13.

It has been shown to be advantageous when the bottom cylinder 11 is brought into contact with the transport belt 16 at the location 29.
At location 29, the transport belt is not supported, and the bottom cylinder 11 and transport belt 16 move in opposite directions. This provides an additional means of mechanical cleaning outside the transport belt 16.

The fiber strand 5 is protected in the area between the front roller pair 7 and the nip roller 23 by a cover 30 which does not come into contact therewith. The cover 30 is the transport belt 1
6 is laterally supported on a slide surface 17. As can be seen especially in FIGS. 2 and 3, only the slide surface 17 arranged in the condensation zone 6 is covered by the cover 30. Region 28 of suction tube 18 between spinning stations
Is not covered.

The individual covers 30 arranged at the spinning stations 1, 2, 3... Are arranged so that any movement of the moving blower shown in FIG. 2 in the direction of arrows D and E in the longitudinal direction of the spinning machine causes any interruption of the spinning process. And removes the attached fiber fly from the spinning machine.

In FIG. 1, it can be seen that the inner side 32 of each transport belt 16 forms a wedge-shaped gap 33 with the slide surface 17, which wedge-shaped gap 33 is particularly susceptible to fiber accumulation. During the transport of the fiber strands 5 through the condensing zone 6, it often happens that either the single fibers reach below the transport belt 16 laterally or through the holes in the transport belt 16 on its inside 32. Here, the single fibers are transported along the wedge-shaped gap 33 and subsequently reach into this gap and remain there. This wedge-shaped gap 33 is therefore particularly affected by the fiber wool. This results in an undesired breakout of fiber in the wedge-shaped gap 33 and a return to the condensed fiber strand 5 in an undesired way, or more easily plugs the holes of the transport belt 16, whereby The condensation effect is reduced, and yarns with more fuzz are produced than desired. It is therefore an object of the present invention to firstly prevent the accumulation of fibers which remain in the wedge-shaped gap 33 as much as possible.

One way to prevent the above undesirable conditions is to provide a profiled extension 34 on the suction tube 18 with a recess 35 aligned toward the inside 32 of the transport belt 16. This recess 35 is provided immediately downstream of the separation line 36 of the condensed fiber strand 5 from the transport belt 16 and is provided as an open groove 37 in the spinning station 1.
The moving blower 31 is continuous between 2, 3... And can approach this open groove. As the moving blower 31 moves along the length of the machine, it blows air over the open groove 37 and the blown air--see arrow L in FIG. 35 to reach 35
5 is provided on the rear side of the transport belt 16, so that any attached fiber accumulation is immediately removed.
In order to prevent the blown fiber wool from landing in the adjacent spinning stations 1, 2, 3,..., A fiber-removing outer surface 38 is provided between the spinning stations 1, 2, 3,.

The suction tube 18 extending along the plurality of spinning stations 1, 2, 3,... Does not extend to the wedge-shaped gap 33. Rather, two shells 39, 40 made of injection molded plastic are provided at each spinning station 1,
., The upper shell 39 of these shells 39, 40 comprises a respective slide surface 17 with a suction slit 20. The shells 39, 40 are tightened from two opposite sides for the purpose of guiding the transport belt 16 onto the suction tube 18 and are attached by at least one thumbscrew. Shells 39 and 40 are supported on profiled extensions 34 of suction tube 18 and are at a distance from each other in recesses 35.

The individual slide surfaces 17 correspond to the suction tube 1
The suction tube 18 itself can be arranged at a distance from the front roller pair 7 since it is not applied directly to 8, but rather is arranged on the upper shell 39. A shell 39 containing the slide surface 17 and the suction slit 20 bridges the gap between the suction tube 18 and the front roller pair 7. Accordingly, a relatively large gap 42 is formed between each of the spinning stations 1, 2 and 3, which on one side is the bottom cylinder 1
1 bounds the other side by a suction tube 18 (FIG. 2). This large gap 42 serves to keep the spinning machine between each of the spinning stations 1, 2, 3,... Clean, and thus the fiber strand 5 in which any fibers are condensed.
Cannot be reached in an undesirable manner.

The suction tube 18 is provided with a relatively wide suction opening 43 in the area of the individual spinning stations 1, 2, 3,..., Which has a great tolerance for their dimensions.
These suction openings 43 are covered in a sealed manner by the respective upper shells 39 during assembly and act together with the individual suction slits 20.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a region of a condensing zone of a spinning station.

2 is a view of the condensation zone in the direction of arrow II in FIG. 1;

3 is a view of the condensation zone in the direction of arrow III in FIG. 1;

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4L056 BC02 BC24 BC25 BG02 BG04 BG16

Claims (4)

[Claims] 1. A spinning machine having a plurality of adjacently arranged spinning stations, wherein a blower moving on the spinning machine acts, each spinning station having a forward roller pair and a drawn fiber. A condensing zone for condensing the strands, each condensing zone including a circulating air permeable transport belt, the transport belt being disposed on a suction tube and guided on a slide surface including a suction slit, the slide surface Is covered by a cover in the area of the suction slit, said transport belt transports the fiber strands across a nip line bounding the condensation zone to a separation point and separates suction tubes extending along a plurality of spinning stations. Moving over a recess at a distance from a point without any support, the recess (3
5) are provided immediately downstream of the separation line (36) and each spinning station (1, 2, 3,...) As an open groove (37)
A spinning machine characterized by being accessible by a moving blower (31) extending therebetween. 2. The spinning machine according to claim 1, wherein for the recess (35), the suction tube (18) is provided with a corresponding profiled extension (34). 3. An open groove (37) provided between each of the spinning stations (1, 2, 3) is provided with a fiber fly waste exclusion limiting surface (3).
The spinning machine according to claim 1 or 2, further comprising (8). 4. The suction tube (18) comprises two shells (39, 40) at the spinning station (1, 2, 3), which guide the transport belt (16), these two shells being 4. The spinning machine according to claim 1, wherein the recesses are set at a certain distance from each other.