CN1369581A - Spinning machine with a number of adjacently arranged spinning positions - Google Patents

Abstract

The invention relates to a spinning machine with a plurality of spinning stations arranged next to one another, each spinning station having a drafting device and a pair of front rollers forming a front nip line, and a collecting zone downstream of the drafting device for collecting a drafted sliver. Each collecting zone comprises an air-permeable conveyor belt for conveying the fiber strands, which is guided by a sliding surface having suction slots. The sliding surfaces with suction slots are each provided with a single hood which is placed over a suction pipe extending to a plurality of spindle positions. The suction pipes are arranged at a distance from the front roller pair, said distance being bridged by the sliding surfaces of the individual covers.

Description

Spinning machine with a number of adjacently arranged spinning positions

The invention relates to a spinning machine having a plurality of adjacently arranged spinning positions, each spinning position having a drafting device with a pair of front rollers forming a front nip line and a The collection of a drafted fiber sliver collection area, the collection area contains a breathable conveyor belt conveying fiber sliver, the latter is guided by a guide surface with a suction slot, the guide surface of a number of conveyor belts It is installed on a suction pipe extending to many spinning positions and protrudes into the wedge-shaped gap formed by the front roller pair.

The drawn fiber sliver in the drafting unit of the spinning machine is then given a spinning twist. If this spinning twist is applied directly after drafting, a so-called spinning triangle may form in the front roller pair of the drafting device, which triangle contains edge fibers that are not properly incorporated into the twisted yarn. In order to avoid this disadvantage, in recent years a so-called gathering zone has been installed downstream of the drafting device, in which the drawn but untwisted yarns are bundled or gathered by means of the sides of their individual fibers, so there is The disadvantageous spinning triangle no longer occurs when another jaw line is placed. The fiber slivers assembled in this way get their spinning twist, and the spun yarn has less hairiness, is uniform and has good strength.

The prior art of above-mentioned this spinning machine can know among the German patent DE199 03 113 A1. Extending to many spinning positions, for example, the suction duct of a spinning frame has a kidney-shaped cross-section, which extends into the wedge-shaped gap formed by the front roller pair. Each spinning position is equipped with a reinforcement plate of thin metal foil about 0.2 to 0.5 mm thick on the suction pipe, wherein the suction slot in the suction pipe of each spinning position is also through the metal foil. extend. In the collective region, the surface of the metal foil forms a sliding surface which follows an extremely small distance from the outer contour of the suction tube. It is advantageous if the sliding surface of each collection zone starts directly in the wedge-shaped gap of the front roller pair of the drafting unit. With known spinning machines of this type, the suction duct also has the disadvantage that there is no reinforcing plate between the two spinning spindles, the suction duct also extends directly to each front roller due to the extremely small thickness of the metal foil . Its disadvantage is mainly that the fibers can be collected between each spinning position, but for some reason the fibers are not integrated into the fiber strand during the collection. These discrete individual fibers may at some point get uncontrolled into the fiber strip and/or become clogged in the perforations of the air-permeable conveyor belt, thereby gradually affecting the aggregation effect.

The object of the present invention is to remove stray fibers roughly between two spinning positions on a spinning machine of the type described above in an easy manner.

The solution to this task is that the suction pipe is arranged within a certain distance from the front roller pair, and the guide surface with suction slots is arranged on a single cover that can be fixed on the suction pipe, and the single cover is connected to the Distance between suction tube and wedge gap.

According to this technical solution, a sufficiently large intermediate space between the suction duct and the front bottom roller is provided between every two spinning positions. By creating large cleaning gaps in the manner described above, discrete fibers may travel down and be cleaned from critical areas, for example by a traveling cleaner. By virtue of the features of the invention, a sufficiently large gap is formed between the spinning spindles to keep it clean. The individual hoods, which can be made entirely of plastic, are pushed onto the suction pipe, which is designed as a substantially circular pipe. Regardless, the individual shrouds must reliably prevent sideways movement and rotation.

It is therefore advantageous to arrange side guide surfaces for each conveyor belt on each individual cover. This has the advantage that the conveyor belt is guided laterally precisely in the actual assembly area.

The suction ducts on each spindle are advantageously equipped with larger suction holes, which are covered by the assembly of a single cover and which interact with the suction slots contained in the single cover. No large tolerances are required for the suction openings in the suction pipe, while the suction slots in the sliding surfaces, which are important for spinning technology, can be assembled together in a simple manner during the production of the individual hoods.

The individual covers are preferably designed as hollow sections with side covers. The bore holes for the individual hoods to be pushed onto the suction pipe are covered. This simultaneously achieves the required sealing between the suction pipe and the individual hoods.

In one technical solution of the present invention, diverting guide rollers for guiding the conveyor belt may be mounted on each individual cover, the diverting rollers being driven by a friction roller. This type of drive transmits sufficient friction to the conveyor belt without causing unusual wear to the conveyor belt. The clamping roller delimiting the collection area on the output side, which on spinning machines according to the above-mentioned technical level, plays the role of driving the conveyor belt, is no longer used as a transmission, but only as a link between the collection and twisting mechanisms. Anti-twisting effect.

Other advantages and features of the present invention can be obtained from the following description of an implementation example and accompanying drawings.

Fig. 1 is a partial sectional side view of a collection area of a spinning position of a spinning machine;

Fig. 2 is according to the view on the collection area area of arrow II direction of Fig. 1, some parts among the figure, especially the pressure roller that is positioned at the collection area above has been omitted.

According to the spinning machine shown in the part of Figure 1 and Figure 2, it is first a ring spinning frame, usually this kind of spinning machine has many spinning positions arranged adjacently in the longitudinal direction of the machine, as can be seen from Figure 2 to the three spinning positions 1, 2 and 3.

Each spinning position 1, 2, 3... has a drafting device 4, but only its terminal area is drawn in Fig. 1, and there is a collection area for the bundled but untwisted fiber sliver 5 6. The collection area is located downstream of the drafting device 4. The other components of the spinning positions 1, 2, 3... are not shown.

Each drafting unit 4 has a pair of front rollers 7, and an apron roller 10 for guiding the lower apron 8 and the upper apron 9 mounted upstream of the pair of front rollers. All the other rollers of the drafting device 4 are not shown on the figure.

The front roller pair 7 has a driven bottom roller 11 extending to a number of spinning positions 1, 2, 3..., the bottom rollers have the known grooves at the spinning positions 1, 2, 3... Tank area 12. On each spinning spindle 1, 2, 3 . The front roller pair 7 defines a front nip line 14 at which the drafting zone of the drafting device 4 ends. In a known manner, the feed fiber material 15, such as a bundle of fiber sliver or roving, is drafted to the required count in the drafting device 4 in the conveying direction A, the drafting basically ends on the front nip line 14 .

For the above-mentioned reasons, a collection zone 6 is arranged downstream of the drafting device 4, in which the untwisted fiber strands 5 are bundled or collected by means of the lateral collection of their individual fibers.

Each collection area 6 has an air-permeable conveyor belt 16 that transports the fiber strands 5 to be assembled through the collection area 6 . Preferably select a kind of thin fabric belt that fine hole is arranged for use about conveyer belt 16, and air permeability promptly is produced by fabric itself.

Each conveyor belt 16 is guided through a guide surface 17, which will be described in detail hereinafter, and is formed by the outline of a single cover 18, which is mounted to a single cover 18 with other single covers 18. The roots extend to the suction pipes 19 of the many spinning positions 1, 2, 3.... The suction line 19 is at low pressure and is connected via a low-pressure connecting line 20 to a low-pressure source not shown in the figure.

The suction slot 21 is located in the sliding surface 17 of each spinning position 1, 2, 3..., the placement of the suction slot 21 is slightly inclined towards the movement direction of the conveyor belt 16, and is provided with a lateral guide edge 22. The fiber strips to be assembled are moved along the edge. The fiber strip 5 gathers on the fiber leading edge 22 with the help of the side gathering of its single fiber and obtains a very slight false twist, which plays a strengthening gathering effect. The conveyor belt 16 is at a certain distance from the suction slot 21 and is guided by a deflection roller 23 designed as a tension roller.

A clamping roller 24 is arranged at the terminal end of each drafting area 6, and the clamping roller and each guide surface 17 form an output nip line 25, and the suction slot 21 extends to this nip line 25, and the latter is to the spinning The yarn is twisted to form a twist stop. Yarn 26 is then produced at output nip line 25, and this moment yarn enters the twisting mechanism not represented on the figure according to conveying direction B, for example on a ring spindle. The pinch rollers 24 prevent the spinning twist applied to the yarn 26 from returning to the collection area 6 .

The driven bottom roller 11 and the bottom roller of the drafting device 4 that are not described or shown in the figure generally extend longitudinally of the spinning machine, and are supported on the support of the drafting device not shown in the figure by the actual spacing. seat.

Turning roller 23 is directly installed near the bottom roller 11, and forms a wedge-shaped gap 27 with the bottom roller. A friction roller 28 mounted in the device support is positioned in this wedge-shaped gap 27 and rests elastically against the bottom roller 11 and deflection roller 23 . The friction roller 28 is driven by the bottom roller 11, and the steering roller 23 is driven by friction and drives the conveyor belt 16 simultaneously. For this purpose, a suitable lining should be used for the friction roller 28 . It can be seen in particular from FIG. 1 that there are two simultaneously operating components at the friction drive point, namely the friction roller 28 and the deflection roller 23 . Although the friction drive requires a certain amount of pressure, practically no wear occurs on the conveyor belt 16 . The nip roller 24 is driven by the conveyor belt 16, and only needs to have the pressure required for the anti-twisting surface 17 in the area of the output nip line 25 to ensure the anti-twist.

It can be seen from FIG. 1 that the front roller pair 7 forms a wedge-shaped gap 29 on its side facing the collecting area 6, into which the sliding surfaces 17 protrude. Each guide surface 17 is technically positioned as close as possible to the area of the nip line 14 and the bottom roller 11, but does not touch the bottom roller and the fiber strip 5 that should be assembled does not turn significantly in the area of the wedge-shaped gap 29. Such an arrangement shows that the yarn 26 produced is of particularly good quality. Tight positioning should be such that there is only a very small gap between each guide surface 17 and the associated front jaw line 14 and bottom roller 11.

The close positioning of the guide surface 17 to the front roller pair 7 helps to generate as few discrete fibers as possible that separate from the fiber strip 5 . If discrete fibers are still produced, they must be prevented from reentering the fiber strand 5 uncontrolled. It is therefore provided as a feature of the invention that a sufficiently large gap 30 is provided between the bottom roller 11 and the suction duct 19 between every two spinning positions 1, 2, 3 . . . The gap 30 should be selected to be large enough that any stray fibers can easily fall through and these fibers can be excluded from the critical area between the two spinning positions 1, 2, 3 . . .

If the bottom roller 11 is in contact with the conveyor belt 16 at a point 31, the cleaning effect can be enhanced, because the bottom roller 11 and the conveyor belt 16 run in opposite directions there. This additionally provides a mechanical cleaning of the conveyor belt 16 .

According to the spinning machine of the prior art, the suction ducts which have been mentioned above and which extend to a plurality of spinning positions 1, 2, 3 . . . are designed to extend as far as the wedge-shaped gap 29. However, this is not the case in the practice of the present invention.

According to Fig. 1 and Fig. 2, a single cover 18 is all set on each spinning position 1,2,3... On the suction pipe 19 of each spinning position 1, 2, 3.... The individual cover 18 is designed as a hollow section 32 with two side covers 33 , 34 . Bore holes are located in the two covers 33 , 34 , the diameter of which is adapted to the diameter of the suction pipe 19 . In this way, a seal between the suction pipe 19 and the individual hoods 18 is achieved at the same time.

Since each guide surface 17 is arranged on a single cover 18, the suction duct 19 can now be installed within a certain distance from the front roller pair 7. A single shroud 18 contains a sliding surface 17 with a suction slot 21 bridging the gap between the suction duct 19 and the wedge-shaped gap 29, unlike the prior art. Produce a bigger gap 30 between every two spinning positions 1,2,3... like this, this gap is to be subjected to the limitation of bottom roller 11 and suction pipe 19. This large gap 30 serves to keep the spinning machine clean between every two spinning positions 1 , 2 , 3 .

Since the individual cover 18 is preferably made of plastic, it can be provided in a simple manner with side thread-guiding surfaces 35 , 36 as a guide for the conveyor belt 16 mainly in the region of the assembly area 6 .

The suction ducts 19 are provided with relatively large tolerance suction openings 37 in the region of each spinning position 1 , 2 , 3 . . . The suction holes 37 are tightly covered by each individual cover 18 when the individual covers 18 are assembled on the suction pipe 19 and cooperate with each suction slot 21 in the individual cover 18 . The suction slot 21 located in the sliding surface 17 has tighter tolerances and is adapted to the special requirements of the assembly process.

Claims (5)

1. spinning machine with many adjacent arranged spinning spindle positions, its each spinning spindle position has one with the drafting system of the front roller of jaw line before a pair of formation and a collecting one that is positioned at the drafting system downstream set district of drawn fiber bar is arranged, the ventilative conveyer belt of a conveying fibre rod is contained in this set district, this conveyer belt leads on a slide guide face that has a suction slot, the slide guide face of many here conveyer belts is mounted on the suction tube that extends to many spinning spindle positions and projects into by front roller in the wedge gap that forms, it is characterized in that, suction tube (19) is placed in the determining deviation of front roller to (7), and the slide guide face (17) of band suction slot (21) is to be placed in suction tube (19) to go up on the fixable single cover (18), and single cover is connected across the spacing between suction tube (19) and the wedge gap (29).

2. according to the spinning machine of claim 1, it is characterized in that single cover (18) all is provided with the avris spigot surface (35,36) of the relevant conveyer belt (16) of guiding.

3. according to the spinning machine of claim 1 or 2, it is characterized in that, at each spinning spindle position (1,2,3 ...) suction tube (19) be provided with suction socket (37), this suction socket is hidden by single cover (18), and concurs with every suction slot (21).

4. according to one of in the claim 1 to 3 spinning machine, it is characterized in that single cover (18) is designed to hollow profile (32), be with two avris cover caps (33,34).

5. according to one of in the claim 1 to 4 spinning machine, it is characterized in that the slewing rollers (23) of guiding conveyer belt (16) are mounted on the single cover (18), are driven by a friction roller (28).

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