CN111448344A - Drafting device for spinning machine with compression device - Google Patents
Drafting device for spinning machine with compression device Download PDFInfo
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- CN111448344A CN111448344A CN201880080017.9A CN201880080017A CN111448344A CN 111448344 A CN111448344 A CN 111448344A CN 201880080017 A CN201880080017 A CN 201880080017A CN 111448344 A CN111448344 A CN 111448344A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/02—Spinning or twisting machines in which the product is wound-up continuously ring type
- D01H1/025—Spinning or twisting machines in which the product is wound-up continuously ring type with a condensing device between drafting system and spinning unit
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/70—Constructional features of drafting elements
- D01H5/72—Fibre-condensing guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
The invention relates to a drafting device (2) for a spinning machine and a method, comprising a delivery roller pair (5) which is formed by a delivery upper roller (6) and a delivery lower roller (7), and a fiber collection area (16) which is arranged downstream of the delivery roller pair (5) of the drafting device (2) and has a pneumatic compression device for compressing the drafted fiber aggregate and has a fiber collection area (16) which has a fiber collection area (16) and a suction tube (17) which is enclosed by and can be sucked by a filter element (18), wherein the fiber collection area (16) is limited by two clamping points (K1, K2) having a corresponding length (L, L), wherein a first clamping point (K1) is defined by the two rollers (6, 7) of the delivery roller pair (5) and a second clamping point (K2) is defined by the delivery upper roller (6) and the filter element (18), characterized in that the length of the clamping point (K3519, 2) of the fiber collection area (16) is greater than the length (K5631, 3526) of the filter element (18) viewed in the longitudinal direction of the fiber (19).
Description
Technical Field
The invention relates to a drafting device with a device for compressing a drafted fiber sliver in a spinning machine.
Background
A drafting device for a spinning machine comprises at least two roller pairs between which a fibre aggregate (Faserverband) is drafted on the basis of the different rotational speeds of the roller pairs. The pair of rollers after which the fiber assembly drafted leaves the draft device and is sent to the spinning device is called a delivery roller pair. The delivery roller pair is composed of a delivery upper roller and a delivery lower roller, and the delivery upper roller and the delivery lower roller form a clamping point for the fiber aggregate to pass through. A device for compressing the drafted fiber assembly is arranged after the delivery roller pair, wherein a mechanical and pneumatic compression device is used.
The same type of device is known in the prior art and is always used when the fiber sliver needs to be compressed after passing through the drawing process in the spinning machine. A corresponding device is described, for example, in DE 10050089 a 1. The compression device disclosed in this case is of the pneumatic type and is mainly composed of a suction shoe (sautschuh) and an apertured carrying member. Wherein a pressing element is attached to one of the pair of delivery rollers, which pressing element and roller form a second clamping point beside the clamping point between the delivery upper roller and the delivery lower roller. DE 10050089 a1 does not discuss the clamping point, and the transport speed of the fibre assembly before and after compression is likewise not further described. A disadvantage of this device is that the fibre assembly can be irregularly compressed by accident during transport of the fibres through the area of the fibre bundle.
Disclosure of Invention
The object of the invention is to improve the known devices and to provide a compression device which is simple in construction and can be used in a single spinning position, which compression device is distinguished by the fact that a uniform compression of the fibre assembly can be reliably achieved.
This object is achieved by a drawing frame having the features of the independent claim.
The invention relates to a drafting device for a spinning machine, comprising a delivery roller pair, which is formed by a delivery top roller and a delivery bottom roller. Furthermore, a fiber compression device for compressing the drafted fiber aggregate is arranged downstream of the delivery roller pair of the drafting device, wherein the fiber compression region has a pneumatic compression device, and the compression device has a fiber bundle region and a suction tube which is enclosed by the screen element and can be sucked. The fiber bundle region is limited by two clamping points of corresponding length, wherein the first clamping point is defined by the two rollers of the delivery roller pair, and the second clamping point is defined by the delivery roller and the screen element. The length of the first clamping point is greater than the length of the second clamping point, as viewed in the longitudinal direction of the fiber aggregate.
The length of the pinch point in the longitudinal direction of the fibre assembly passing through the pinch point is influenced by the nature of the elements forming the pinch point or, more precisely, by the pressure used to press the two elements together. Wherein the longer the clamping point, the greater the elasticity of the element in the case of an increase in pressure. Longer pinch points produce stronger pinching of the individual fibers of the fiber assembly, thereby enhancing the slip resistance of the transport of the fiber assembly. The first nip point formed by the delivery roller pair must convey the fiber aggregate as non-slip as possible on the basis of the drafting of the fiber aggregate to be achieved, and therefore has a relatively large length.
Subsequently, a suction tube is arranged on the pair of delivery rollers. The suction pipe is at least partially enclosed by a screening element. Between the first and second pinch points, a fiber bundle region is enclosed by the screening element and the element forming the first pinch point. In this fiber bundle region, the drawn fiber aggregate leaving the first clamping point is compressed. The fibre assembly discharged from the pair of delivery rollers meets the screening element just before it reaches the second nip point and is conveyed to the second nip point by this screening element. In which the fiber assemblies are collected together by the inflow of the air flow. In order that, on the one hand, the fibre assembly in the second clamping point does not re-spread and, on the other hand, a certain freedom of movement is left for the bundling of several fibres, the length of the second clamping point is preferably smaller than the first clamping point. In contrast to conventional pneumatic compression devices, i.e. compression devices in which the fibre assembly on the screen element is moved transversely to its direction of movement so that the fibres are closed together, only the part of the fibres remote from the fibre assembly, or rather only the fibre ends of the fibre assembly, is used in the fibre bundling, without the fibre assembly deviating from its direction of movement. In this fiber bundle, the fiber ends are guided to the fiber aggregate by means of a pneumatic suction air flow and are placed on the fiber aggregate in a second clamping point.
The second clamping point drives the screening element and ensures that the rotation of the fiber aggregate produced by the subsequent spinning device does not extend beyond the second clamping point further into the fiber bundle region. The friction drive of the screening element produces a small slip, so that the speed of the screening element is less than that of the delivery roller pair. This also contributes to bundling of the fiber assembly.
The screening element surrounds a suction tube having a suction opening between the first and second clamping points. The ambient air sucked through the suction port causes a plurality of fibers far from the fiber aggregate to move toward the suction port, thereby performing fiber aggregate bundling. It is advantageous to move the suction tube and the screening element as close as possible to the first clamping point. The suction pipe can be designed as a pipe in the true sense or as an elongated hollow body with a triangular, polygonal, oval or other type of cross section.
Advantageously, a separation point is provided at the second clamping point, at which the drafted and compressed fiber aggregate is separated from the screening element. After the separation point, a deflection point for the drawn and compressed fiber aggregate is then arranged, by means of which the fiber aggregate is deflected and guided to the subsequent spinning device. In order to deflect the fibre assembly in a manner that does not damage the fibre as much as possible and to provide the fibre assembly entry conditions necessary for the proper functioning of the spinning device, the angle between the tangent of the tangential output top roller at the second clamping point and the run of the fibre assembly between the separation point and the deflection point is less than 90 °, preferably less than 70 °.
The fiber assembly is guided to the screening element by the second clamping point. After leaving the second clamping point, the fibre assembly is guided through the deflection point before it reaches the spinning device from the deflection point. The deflection point may be provided as a wire guide or as a simple deflection bar. If this fibre assembly is subjected to too great a deflection, the quality of the fibre assembly is impaired, and therefore the separation point is advantageously arranged on the screening element so that the fibre assembly runs as smoothly as possible. The position of the deflection point is given by the geometric arrangement of the spinning machine and its drafting device. Whereas the separation point can be influenced by the geometry of the suction duct which the screening element surrounds.
It is further advantageous if the contact pressure of the second clamping point is smaller than the contact pressure of the first clamping point. Accordingly, the contact pressure of the output upper roller of the screening element against the second clamping point is less than the contact pressure of the rollers of the output roller pair forming the first clamping point with respect to one another. In addition to different contact pressures, different lengths of the clamping points can also be influenced by different material choices with respect to the elasticity of the two elements arranged opposite one another at the respective clamping point.
The pressing force of the first clamping point is preferably 75N to 125N, and the pressing force of the second clamping point is preferably 8N to 20N. Due to the smaller pressing force in the second nip point, the compressed fiber aggregate can be smoothly further conveyed. The lower contact pressure also makes it possible to have only a small speed difference between the delivery upper roller and the screen band, which is advantageous for fiber collection. The pressing force is sufficiently large to prevent the rotational flow supplied to the fiber assembly after the compression region from being transmitted into the compression region.
The clamping length between the first clamping point and the second clamping point is advantageously smaller than the average fibre stacking length of the fibre assembly to be compressed. This makes it possible to always hold most of the fibers contained in the fiber aggregate in the first clamping point or in the second clamping point. Wherein the fiber assembly is transported in a defined manner from the first clamping point to the second clamping point. Thus, in the area of the fiber bundle, only the fiber portion remote from the fiber union is fed into the fiber strand. The fiber portion remote from the fiber bond, or rather the fiber ends, can be guided by the air flow to the fiber aggregate, wherein the fiber aggregate itself is not conveyed directly by the screening element, but rather passes through the fiber bundle region in a manner held by the clamping points. This removes so-called hairs from the fiber assembly and binds the hairs to the fiber assembly. The continuous clamping of the at least one fiber end also prevents the fiber aggregate from losing again or possibly partially the elongation formed in the drawing frame during the passage through the fiber strand region.
The clamping length is preferably 12mm to 20 mm. The remote fiber portions are collected to the fiber aggregate in a manner to firmly bind them in a subsequent spinning process. This makes it possible to make full use of the substance in the yarn by using the other fiber portions, as compared with the fiber aggregate not subjected to compression. The advantage produced by the shorter fiber length compared to conventional pneumatic compression, in which the fibers are moved along their entire length through the screening element, is that only the free fiber ends are moved, and therefore the fiber bundling force has to overcome only the strength of a few fibers.
Furthermore, the suction tube advantageously has a radius of less than 10mm in the region of the separation point after the second clamping point. This results in a well-defined separation point. This allows the entire fiber assembly to be uniformly separated, which maximizes the retention of the previously performed fiber bundles.
It is also advantageous if the separation point is at a distance of less than 10mm from the second clamping point on the surface of the screening element and/or at a distance of less than 4mm from the surface of the output top roller in the radial direction of the output top roller along the second clamping point. The shortest possible guidance of the fibre assembly after the second clamping point by the screening element also facilitates the subsequent deflection point and the geometric arrangement of the spinning device. The risk of lateral displacement of the fibre assembly on the screening element and thus damage to the previously bundled fibre assembly is also minimized by the above-described solution.
In addition, the suction tube is advantageously spaced from the surface of the output bottom roller by less than 2mm in the radial direction of the output bottom roller. This arrangement of the suction tube as close as possible to the first clamping point makes it possible to detect early the fibre ends of the fibre assembly which leave the first clamping point and have been held by the second clamping point. Since the clamping length available for the remote fibers to be bound in the fiber aggregate is short, the detection of the fibers as early as possible in the fiber bundle region is of great importance.
The compression device is advantageously arranged on the frame of the spinning machine or on the drafting device. In an arrangement in which the compression device is arranged on the drafting device, the fastening is preferably carried out on a pressure arm of the drafting device. When the pressure arm, which normally also carries the top roller of the drafting device roller pair, is lifted off, not only the entire drafting device is opened, but also the compression device is lifted. This facilitates maintenance of the drafting device.
In order to influence the adjustment of the contact pressure of the compression device on the rollers contacting the second clamping point and thus the length of the second clamping point, the compression device is contacted by the rollers contacting the second clamping point by means of the adjustment device. The adjustment device is provided with a mechanical adjustment member, such as a screw or a spring. A roller which applies a spring to cause the adjusting device to elastically press the screening element and/or the suction tube to the second clamping point.
A fiber aggregate in a spinning machine is compressed in a drafting device having a delivery roller pair formed by a delivery upper roller and a delivery lower roller. The fiber aggregate is conveyed downstream by a delivery roller pair to a fiber compression device which has a compression device with a fiber bundle region and a suction pipe which is enclosed by a screen element and can be sucked. The fiber bundle region is limited by two clamping points of corresponding length, wherein the output upper roller and the output lower roller define a first clamping point, and the output upper roller and the screen element define a second clamping point. The fibers of the fiber assembly are directed to the screening element through the first nip point and are received by the screening element from the second nip point. The guidance of the fibers is determined by the greater length of the first clamping point relative to the length of the second clamping point.
This ensures that the fibers of the fiber aggregate are guided reliably by the first clamping point and no longer spread apart after compression by the second clamping point. This maintains the fiber assembly in a compressed shape.
Drawings
Further advantages of the invention are illustrated in the following examples. In the figure:
FIG. 1 is a schematic longitudinal cross-sectional view of a spinning machine of the prior art;
FIG. 2 is a schematic longitudinal sectional view of a compressing device of a draft device according to an embodiment of the present invention, an
Fig. 3 is a schematic longitudinal sectional view of a compressing device of a draft device according to another embodiment of the present invention.
Detailed Description
Fig. 1 shows a schematic longitudinal section of a spinning machine of the prior art, in particular a ring spinning machine. The drawing shows exemplary components of a spinning machine, namely a drafting device 2 and a spinning device 10. The draft device 2 is composed of three pairs of rollers, i.e., a pair of feed rollers 3, a pair of belt rollers 4, and a pair of delivery rollers 5. The delivery roller pair 5 is formed by a delivery upper roller 6 and a delivery lower roller 7. The two rollers of a pair of roller pairs come together and form a nip point at their point of contact, wherein the nip point K1 is formed by the pair of delivery rollers 5 between the delivery top roller 6 and the delivery bottom roller 7. The fiber aggregate 1 entering the drafting device 2 is clamped between the rollers of the roller pairs 3, 4 and 5 by a clamping point and drafted based on the different rotational speeds of the roller pairs 3, 4 and 5. The fiber assembly 1 is conveyed through the draft device 2 while being drafted. After leaving the draft device 2, the fiber assembly 8 drafted reaches the yarn guide 9 and is further guided to the spinning device 10. The spinning device 10 is essentially formed by a ring plate 14 carrying the spinning ring 12 and a spindle rail 15, on which the winding shaft 13 is fixed. The fiber assembly 8 reaches the reel 13 via the rotor 11. To spin the fibre aggregate 8, the reel 13 is rotated, which causes the rotor 11 to be likewise rotated by the fibre aggregate 8 on the ring 12. The fiber assembly 8 is rotated by the different rotation speeds of the spool 13 and the rotor 11, thereby forming a yarn, which is wound around the spool 13 by the up-and-down movement of the ring plate 14.
Fig. 2 shows a schematic longitudinal sectional view of a compression device of a draft device according to an embodiment of the present invention, a pair of delivery rollers 5 formed by a delivery lower roller 7 and a delivery upper roller 6 forms a nip point K1. through which a fiber aggregate 1 passes, and at least one of the surfaces of the rollers 6 and 7 or the surfaces of the rollers 6 and 7 is deformed based on a pressing force F1 of the rollers 7 and 6 of the pair of delivery rollers 5, so that a nip point K1 extends over a length L1, the delivery upper roller 6 and the delivery lower roller 7 contact each other over a length L1, a length L1 of the nip point K1 extends in a moving direction of the fiber aggregate 1 and corresponds to a distance by which the fiber aggregate 1 is nipped by the pair of delivery rollers 5, and after leaving the pair of delivery rollers 5, the fiber aggregate is drafted and is further guided as a drafted fiber aggregate.
Subsequently, a suction pipe 17 is arranged on the delivery roller pair 5, the suction pipe 17 being embodied as an endless belt and being enclosed by a screen element 18 guided by a deflection device 24, in the exemplary embodiment shown, the screen element 18 together with the delivery top roller 6 forms a second clamping point K2. for the drafted fibre aggregate, pressing the suction pipe 17 together with the screen element 18 guided thereon against the delivery top roller 6 with a pressing force F2, so that the surface of the delivery top roller 6 is slightly deformed, as a result of which a length L2 of the second clamping point K2 is produced, the shape of the suction pipe 17 being depicted as a polygon, but any other shape is equally possible, for example a triangle, an ellipse, etc.
The drafted fiber assembly passes through the fiber bundle region 16 between the first clamping point K1 and the second clamping point K2. The tow region 16 represents a space surrounded by the delivery upper roller 6, the delivery lower roller 7, and the suction duct 17. The suction tube 17 has a suction opening 23 in this fiber bundle region 16. The suction opening 23 is preferably formed as a slot-shaped cutout in the wall of the suction tube 17. The suction pipe 17 is connected to a source of underpressure (not shown), which causes air to be sucked from the fiber bundle region 16 via the suction opening 17 and thus also through the screen element 18 sliding over the suction opening 17. The drawn fiber aggregate is brought close to the screen element 18 by the generated air flow, wherein a number of fibers remote from the drawn fiber aggregate are sent to the suction opening 23 to be attached to the drawn fiber aggregate.
The friction force generated in the take-off top roller 6 by the clamping point K2 moves the screen element 18, so that the drafted fibre assembly is fed from the tow region 16 to the clamping point K2. and subsequently the compressed fibre assembly 19 leaves the screen element 18 at the separation point 21, which does not necessarily correspond to the end of the clamping point K2, then the compressed fibre assembly 19 is fed at the deflection point 20 to the spinning device or, to be precise, to a thread guide arranged in front of the spinning device, by means of the geometry of the suction tube 17 and the arrangement of the deflection point 20, the necessary inlet geometry can be re-established despite the additional arrangement of the compression device to achieve the intact function of the spinning device, in a corresponding arrangement, it is likewise possible to use the thread guide 9 (see fig. 1) corresponding to the spinning device as a deflection point, so that no additional deflection point 20 is provided, in order to prevent the compressed fibre assembly 19 from being damaged, an angle α of less than 70 ° is implemented, at which the compressed fibre assembly 19 leaves the separation point 21 at an angle between the take-off element 18 in the take-off roller 18 in the embodiment, the angle of the second angle of the take-off top roller 18, which is equal to the angle 4650, 5922, which the angle of the nip roller 19, which is moved at the tangent to the tangent of the second angle 5922, which is equal to the angle of the nip point.
Fig. 3 is a schematic longitudinal sectional view of a compression device of a draft device according to another embodiment of the present invention. The delivery roller pair 5 formed by the delivery lower roller 7 and the delivery upper roller 6 forms a nip point K1 through which the fiber aggregate 1 passes. After leaving the first clamping point K1, the drafted fiber aggregate encounters the screening element 18 which surrounds the suction pipe 17 and the deflection device 24. In order to ensure that the fibre assembly transitions from the first clamping point K1 to the screening element 18 without interference, the suction pipe 17 is arranged at a distance C of less than 2mm from the surface of the delivery bottom roller 7. The distance C is measured from the surface of the output bottom roller 7 in the radial direction of the output bottom roller 7. The screen element 18 conveys the drafted fibre assembly to a second clamping point K2 formed by the delivery top roller 6 and the screen element 18. The friction generated by the delivery top roller 6 at the nip point K2 moves the screen element 18, so that the drafted fiber aggregate is transported from the tow region 16 to the nip point K2. The compressed fiber assembly 19 then exits the screen element 18 at a separation point 21.
The suction pipe 17 is designed such that the separating point 21 is arranged in the radial direction of the output top roller 6 in a second clamping point K2 at a distance B of less than 4mm from the surface of the output top roller 6. The length a of the compressed fibre assembly 19 from the second clamping point K2 up to the separation point 21 on the screen element 18 is less than 10 mm. In order to minimize fiber damage, the suction tube is provided with a radius R of less than 10mm in the region of the separation point.
List of reference numerals
1 fiber aggregate
2 draft device
3 input roller pair
4 belt roller pair
5 output roller pair
6 output top roller
7 output bottom roller
8 drafted fiber aggregate
9 wire guide
10 spinning device
11 rotor
12 ring shape
13 reel
14 annular plate
15 spindle rail
16 fiber bundle region
17 suction tube
18 screening element
19 compressed fiber aggregate
20 deflection point
21 point of separation
22 tangent line
23 suction opening
24 deflection device
α angle between tangent and fiber assembly
Distance between A separation point and second clamping point
Distance between B separation point and surface of output top roller
Distance between suction tube C and surface of output bottom roller
Pressing force of F1 first clamping point
F2 pressing force of second clamping point
K1 first clamping Point
K2 second clamping point
L1 length of first pinch point
L2 length of second pinch point
Radius of the suction tube
Claims (15)
1. A drafting device (2) for a spinning machine, comprising
A delivery roller pair (5) formed by a delivery top roller (6) and a delivery bottom roller (7), an
A fiber compression device which is arranged at the downstream of the output roller pair (5) of the drafting device (2) and is used for compressing the drafted fiber aggregate,
the fiber compression device has a pneumatic compression device,
the compression device has a fiber bundle region (16) and a suction tube (17) which is enclosed by a screening element (18) and can be sucked,
wherein the fiber bundle region (16) is limited by two clamping points (K1, K2) having respective lengths (L1, L2),
wherein a first clamping point (K1) is defined by the two rollers (6, 7) of the delivery roller pair (5),
a second clamping point (K2) is defined by the output top roller (6) and the screen element (18),
the length (L1) of the first clamping point (K1) is greater than the length (L2) of the second clamping point (K2) as viewed in the longitudinal direction of the fiber aggregate (1, 19).
2. Drafting device (2) according to claim 1, characterised in that a separation point (21) is provided at the second clamping point (K2), at which the drafted fibre aggregate (8) is separated from the screening element (18), and that a deflection point (20) for the compressed fibre aggregate (8) is arranged after the compression zone, and that at the second clamping point (K2) the angle (α) between the tangent (22) of the output upper roller (6) and the course of the fibre aggregate (8) between the separation point (21) and the deflection point (20) is less than 90 °.
3. Drafting device (2) according to one or more of the preceding claims, characterized in that the deflection point (20) is formed by a deflection bar or a thread guide.
4. Drafting device (2) according to one or more of the preceding claims, characterised in that the pressing force (F2) of the second clamping point (K2) is smaller than the pressing force (F1) of the first clamping point (K1).
5. Drafting device (2) according to one or more of the preceding claims, characterised in that the pressing force (F1) of the first clamping point (K1) is 75N to 125N and the pressing force (F2) of the second clamping point (K2) is 8N to 20N.
6. Drafting device (2) according to one or more of the preceding claims, characterized in that the clamping length between the first clamping point (K1) and the second clamping point (K2) is less than the average fibre stack length of the fibre assembly to be compressed.
7. Drafting device (2) according to claim 6, characterized in that the clamping length is 12mm to 20 mm.
8. Drafting device (2) according to one or more of the preceding claims, characterized in that the suction tube (17) has a radius (R) of less than 10mm in the region of the separation point (21) after the second clamping point (K2).
9. Drafting device (2) according to one or more of the preceding claims, characterised in that said separation point (21) is at a distance (A) of less than 10mm from said second clamping point (K2) on the surface of said screening element (18).
10. Drafting device (2) according to one or more of the preceding claims, characterised in that the separation point (21) is at a distance (B) of less than 4mm from the surface of the output top roller (6) in the radial direction of the output top roller (6) of the second nip point (K2).
11. A drafting device (2) according to one or more of claims 2 to 9, characterized in that the distance (C) of the suction duct (16) from the surface of the output bottom roller (7) in the radial direction of the output bottom roller (7) is less than 2 mm.
12. Drafting device (2) according to one or more of the preceding claims, characterized in that said compression device is arranged on the frame of said spinning machine or on said drafting device (2).
13. Drafting device (2) according to claim 9, characterized in that said compression device is arranged on a pressure arm of said drafting device (2).
14. Drafting device (2) according to one or more of the preceding claims, characterised in that said compression means are pressed by an output top roller (6) with adjusting means up to said second nip point (K2).
15. A method for compressing a fibre aggregate (8) in a spinning machine having a drafting device (2) with a delivery roller pair (5) formed by a delivery upper roller (6) and a delivery lower roller (7), wherein the fibre aggregate (8) is conveyed downstream by the delivery roller pair (5) to a downstream fibre compression device,
the fiber compression device has a pneumatic compression device,
the compression device has a fiber collecting area (16) and a suction tube (17) which is enclosed by a screening element (18) and can be sucked,
wherein the fiber bundling zone (15) is limited by two clamping points (K1, K2) with corresponding lengths (L1, L2),
wherein a first clamping point (K1) is defined by the two rollers (6, 7) of the delivery roller pair (5),
a second clamping point (K2) is defined by the output top roller (6) and the screen element (18),
the fibers of the fiber assembly are conveyed to the screening element (18) by the first clamping point (K1) and are received by the screening element (18) from the second clamping point (K2),
the guidance of the fibers is determined by the greater length (L1) of the first clamping point (K1) relative to the length (L2) of the second clamping point (K2).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH01527/17 | 2017-12-15 | ||
| CH01527/17A CH714444A1 (en) | 2017-12-15 | 2017-12-15 | Drafting system for a spinning machine with a compacting device. |
| PCT/EP2018/083319 WO2019115267A1 (en) | 2017-12-15 | 2018-12-03 | Drawing frame for a spinning machine having a compacting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111448344A true CN111448344A (en) | 2020-07-24 |
Family
ID=64664247
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880080017.9A Pending CN111448344A (en) | 2017-12-15 | 2018-12-03 | Drafting device for spinning machine with compression device |
| CN201822089459.XU Active CN209652486U (en) | 2017-12-15 | 2018-12-12 | Drafting system for the spinning machine with compression set |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822089459.XU Active CN209652486U (en) | 2017-12-15 | 2018-12-12 | Drafting system for the spinning machine with compression set |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3724382B1 (en) |
| CN (2) | CN111448344A (en) |
| CH (1) | CH714444A1 (en) |
| WO (1) | WO2019115267A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH714444A1 (en) * | 2017-12-15 | 2019-06-28 | Rieter Ag Maschf | Drafting system for a spinning machine with a compacting device. |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010020357A1 (en) * | 2000-03-08 | 2001-09-13 | Zinser Textilmaschinen Gmbh | Drafting frame for a spinning machine |
| CN209652486U (en) * | 2017-12-15 | 2019-11-19 | 里特机械公司 | Drafting system for the spinning machine with compression set |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10050089C2 (en) | 2000-03-08 | 2002-06-27 | Zinser Textilmaschinen Gmbh | Drafting system for a spinning machine |
| US4976096A (en) * | 1989-06-15 | 1990-12-11 | The United States Of America As Represented By The Secretary Of Agriculture | System for producing core/wrap yarn |
| DE19838762B4 (en) * | 1998-08-26 | 2009-04-16 | Maschinenfabrik Rieter Ag | Spinning machine with a variety of spinning stations |
| DE19922861A1 (en) * | 1999-05-19 | 2000-11-23 | Stahlecker Fritz | System to condense a drawn sliver maintains a clamping action on a significant portion of the sliver fibers at the end of the drawing unit during the condensing action to prevent clogging the transport belt |
| DE10019436A1 (en) * | 2000-04-19 | 2001-10-25 | Zinser Textilmaschinen Gmbh | Sliver drawing unit has a condensing action between two defined sliver clamping points with a lateral reciprocating movement across the sliver travel line to reduce wear for a consistent spun yarn quality |
| DE10053698A1 (en) * | 2000-10-23 | 2002-05-02 | Stahlecker Fritz | Device on a spinning machine for compacting a fiber structure |
| DE10343316A1 (en) * | 2003-09-10 | 2005-04-14 | Wilhelm Stahlecker Gmbh | Fiber strand focussing apparatus of spinning machine, has tension roller that arranged at down stream side of deflection roller, enables deflection roller to deflect transport belt at specific angle |
| DE102007006282A1 (en) * | 2007-02-01 | 2008-08-07 | Wilhelm Stahlecker Gmbh | Drawframe with compression zone |
-
2017
- 2017-12-15 CH CH01527/17A patent/CH714444A1/en not_active Application Discontinuation
-
2018
- 2018-12-03 CN CN201880080017.9A patent/CN111448344A/en active Pending
- 2018-12-03 EP EP18815976.8A patent/EP3724382B1/en active Active
- 2018-12-03 WO PCT/EP2018/083319 patent/WO2019115267A1/en unknown
- 2018-12-12 CN CN201822089459.XU patent/CN209652486U/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010020357A1 (en) * | 2000-03-08 | 2001-09-13 | Zinser Textilmaschinen Gmbh | Drafting frame for a spinning machine |
| CN209652486U (en) * | 2017-12-15 | 2019-11-19 | 里特机械公司 | Drafting system for the spinning machine with compression set |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019115267A1 (en) | 2019-06-20 |
| EP3724382B1 (en) | 2023-01-25 |
| CN209652486U (en) | 2019-11-19 |
| CH714444A1 (en) | 2019-06-28 |
| EP3724382A1 (en) | 2020-10-21 |
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