CN113994036A - Suction tube for a compression device and device for pneumatically compressing a drafted fiber aggregate - Google Patents
Suction tube for a compression device and device for pneumatically compressing a drafted fiber aggregate Download PDFInfo
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- CN113994036A CN113994036A CN202080038846.8A CN202080038846A CN113994036A CN 113994036 A CN113994036 A CN 113994036A CN 202080038846 A CN202080038846 A CN 202080038846A CN 113994036 A CN113994036 A CN 113994036A
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- suction
- suction tube
- roller
- sliding surface
- delivery
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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 suction tube for a compression device in a drafting device (2) of a spinning machine, comprising a jacket, an inner space, a suction slot (32), a guide surface surrounding the suction slot (32) for a sieve element (18), and an opening of a suction connection for sucking the inner space and the suction slot. The suction pipe (17) has a sliding surface (31) outside the guide surface of the screening element (18), which extends at least partially radially beyond the outer circumference of the jacket of the suction pipe (17). The invention also relates to a device for pneumatically compressing a drafted fiber aggregate (8), which has a corresponding suction tube, a delivery roller pair (5) and a screen element in a drafting device (2) of a spinning machine, wherein the delivery roller pair is formed by a delivery upper roller (6) and a delivery lower roller (7). The suction pipe (17) is at least partially surrounded by the screen element and forms a clamping point (K1) with the output upper roller (6) or the output lower roller (7) in the area of the guide surface of the screen element.
Description
Technical Field
The invention relates to a suction tube for a compression device in a drafting device of a spinning machine, having a jacket and an inner space, and having a suction slot, having a guide surface for a screening element surrounding the suction slot, and having an opening of a suction connection for sucking the inner space and the suction slot, and to a device for pneumatically compressing a drafted fiber aggregate.
Background
A suction tube of a compression device for a drafting device of a spinning machine is arranged in such a way that it is connected to a delivery roller of such a drafting device. The prior art discloses the application of an excessive number of suction tubes to compression devices in spinning machines.
The same type of device is always used when the fiber band needs to be compressed after the fiber band has undergone a drawing process in a spinning machine. Wherein the suction tube is at least partially surrounded by an apertured leather collar or a knitted screen band. A corresponding device is described, for example, in DE 10261785 a 1. The suction duct disclosed in this patent is partially surrounded by an air-permeable conveyor belt and has a suction slit on the side facing the fibrous web to be compressed. The suction tube is held between two spinning positions arranged next to one another and has a suction slot for each spinning position.
EP 1134309 a1 attempts to design the compression device in such a way that no additional rollers are provided for driving the air-permeable transport belt. In this case, the suction pipe is replaced by a suction shoe which is surrounded by an air-permeable transport belt next to the deflecting roller and has a suction slot required for compression.
A disadvantage of the pivotable suction tube is that contact with the rollers of the drafting device can occur. As a result, the wear of the suction tube and even of the screen band increases, in which case the screen band can rub against the rollers of the drawing frame.
Disclosure of Invention
In view of the above, it is an object of the present invention to provide a suction tube and a compression device to minimize wear.
The solution of the invention to achieve the above object is a suction tube and a compression device having the features of the independent claims.
According to the invention, the suction tube of the compression device used in the drafting device of the spinning machine has a jacket, an inner cavity and a suction slit. The suction pipe also comprises a guide surface for the screening element, which surrounds the suction slot, and an opening of the suction connection for sucking the interior of the suction pipe and the suction slot. In order to prevent the suction tube from contacting one of the rollers of the drafting device (in particular during deflection of the suction tube) and in the process from becoming severely worn, the suction tube has a sliding surface outside the guide surface of the screening element. Wherein the sliding surface at least partially radially protrudes beyond the outer circumference of the jacket of the suction tube such that the sliding surface contacts the rollers of the drafting device rather than the suction tube. Thereby protecting the material of the suction tube itself against wear. In particular, in the case of a movement of the suction tube which brings the suction tube into contact with a lower roller (made of steel with grooved surface) of the drawing frame, the sliding surface selected in particular in terms of the material fit with the lower roller is more wear-resistant than suction tubes which are usually formed from aluminum.
Advantageously, the suction tube has at least in part a polygonal, circular, oval, triangular, half-moon or kidney-shaped cross section. The suction tube thus enables, on the one hand, an optimum formation of the sealing region and, on the other hand, an optimum guidance of the screening element. In a corresponding design of the suction tube, the screening element can also be guided in such a way that dust and fluff which may have adhered to the screening element can be easily and preferably automatically separated again from the screening element.
Advantageously, the suction tube is a double-chamber profile, wherein a negative pressure is present in the first chamber and a fixing element can be arranged in the second chamber. By dividing the profile of the suction tube into two parts, no special precautions need to be taken to seal the suction tube when fixing it. In this case, the fixing takes place in a chamber without underpressure. Accordingly, the vacuum connection of the suction line is provided only on the other chamber.
Particularly advantageously, at least one end of the suction tube is closed with a cover. By closing the suction tube with the cover, the suction tube can be simply manufactured, for example, as an extruded profile, and the tip of the suction tube can be reliably sealed.
It is also advantageous if the sliding surface is arranged on the cover and/or on the slide on the suction tube. A particularly simple solution is to integrate the sliding surface into the cover. The cover can be designed such that it protrudes over the outer circumference of the jacket of the suction tube, so that when the suction tube is deflected in the direction of the rollers of the drafting device, this protruding cover region forms a sliding surface.
In addition or alternatively, a slide forming a sliding surface is advantageously arranged on the suction tube. This slide can be connected to the suction tube in an advantageous manner. Wherein the slide can be connected to the suction tube by means of a connecting device or can be glued to the suction tube.
It is also advantageous if the sliding surface is formed from a friction-resistant material, in particular from a plastic, ceramic and/or a friction-resistant coating. The friction-resistant material is preferably selected from one of the materials paired with the material forming the friction resistance with the rollers of the drafting device with which they are in contact.
Advantageously, the cover is arranged, in particular inserted, in the lumen of the suction tube and/or on the outer circumference of the sheath. Usually only a plug-in connection of the cover cap with the jacket of the suction tube is required. In the case of particularly high stresses, however, it is also advantageously possible to prevent the cover from unintentionally separating from the suction pipe by means of fastening elements, such as clips, adhesives or screws.
Advantageously, the suction slots and/or the guide surfaces of the screening element can also be arranged on the cover. By arranging the suction slots and/or guide surfaces on the cover, the suction slots and/or guide surfaces can be replaced very quickly and easily. This makes it possible to provide, for example, covers with differently shaped suction slots or guide surfaces. The cover can thus be integrated with different suction slots or guide surfaces to meet the specific requirements of different fiber assemblies or yarns to be woven.
Particularly advantageously, the suction slots have a width of 0.5mm to 3.0mm and a length of 2.0mm to 5.0 mm. Suction slots of this size, which have a compression device in the form of a small suction tube immediately after the delivery roller pair of the drafting device, are particularly suitable for compressing the textile. Of course, other sizes of suction slots may be used with the present invention.
Also advantageously, the suction slot forms an angle (α) of 70 ° to 110 ° with the longitudinal axis of the suction tube. This inclined position of the suction slit relative to the perpendicular to the direction of movement of the suction tube or the fiber aggregate achieves excellent compression of the fiber aggregate.
Particularly advantageously, the two mirror-image suction pipes have a common longitudinal axis and are constructed or connected in one piece. The production and fastening of the suction tube and the connection of the vacuum line to the suction tube are particularly simple. If the two suction pipes are constructed separately but connected to one another, it is particularly advantageous if the separation point is detachable, so that, for example, the two suction pipes can be separated from one another for cleaning.
The device for pneumatically compressing a drafted fiber aggregate according to the invention has a delivery roller pair formed by a delivery upper roller and a delivery lower roller and a screen element in a drafting device of a spinning machine. The suction pipe is at least partially surrounded by the screening element. The screen element and the output upper roller or the output lower roller form a clamping point in the region of the guide surface of the screen element. The suction tube is constructed in accordance with one or more of the aforementioned features.
The device is particularly advantageous in that the sliding surface projects radially beyond the outer circumference of the jacket of the suction tube in such a way that, on the one hand, it does not come into contact with the output top roller or the output bottom roller if a clamping point is formed. On the other hand, when the delivery upper roller is lifted from the delivery lower roller, the sliding surface comes into contact with the delivery upper roller or the delivery lower roller. When the drawing frame is closed, i.e. when a nip is formed between the delivery top roller and the delivery bottom roller, the suction tube rests against the delivery top roller or the delivery bottom roller, while the fiber aggregate is usually located between the delivery top roller and the suction tube or the screen element. When the drafting device is open, i.e. when the delivery top roller and the delivery bottom roller no longer form a nip point, the suction tube is deflected in the direction of the delivery bottom roller. In this state, no fiber aggregate is present between the suction tube and the output bottom roller, so that the suction tube abuts against the continuously rotating output bottom roller. This results in severe wear on the suction tube or the screening element, which wear can be prevented by the sliding surfaces according to the invention.
Drawings
Further advantages of the invention are described in the following description of the embodiments. Wherein:
FIG. 1 is a schematic view of a spinning position of a ring spinning machine,
figure 2 is a side view of the compression device,
fig. 3 is a side view of the compression device of fig. 2, with the pressure arm raised,
figure 4 is a front view of two compression devices,
figure 5 is a cross-section of the suction duct,
figure 6 is a rear view of the suction duct,
figure 7 is a rear view of another suction duct, an
Figure 8 is a front view of the load arm.
Detailed Description
In the following description of alternative embodiments, the same reference numerals are used for features that are identical and/or at least similar in technical solution and/or operating principle. Unless otherwise stated, the technical solutions and/or the operating principles of these features are equivalent to those of the features already described above.
Fig. 1 is a schematic illustration of a cross section of a spinning machine, in particular a ring spinning machine with a compression device 20. 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 roller pairs, i.e., a feed roller pair 3, a belt roller pair 4, and a delivery roller pair 5. The delivery roller pair 5 is formed by a delivery upper roller 6 and a delivery roller 7. The two rollers of one roller pair come together and form a nip point at their contact point, wherein the nip point K1 is formed by the delivery roller pair 5 between the delivery top roller 6 and the delivery roller 7. The clamping point K2 is formed by the suction tube 17 (fig. 2) which can be sucked and is pressed against the delivery top roller 6. The fibre assembly 1 entering the drafting device 2 is clamped between the rollers of the roller pairs 3, 4 and 5 by corresponding clamping points and drafted on the basis of 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 drafting device 2, the drafted fiber aggregate 8 reaches a compression device 20, where the fiber aggregate is compressed.
Between the clamping points K1 and K2, a fiber collecting zone 16 is provided on the suction tube 17 with the suction slot 32, in which the fibers of the fiber aggregate 8 are collected or compressed (fig. 2). The fibre aggregate 8 then reaches the thread guide 9 and is further guided to the spinning device 10. The spinning device 10 is mainly composed of a ring plate 14 that carries a spinning ring 12, and a spindle rail 15 to which a spool 13 is fixed. The fiber assembly 8 reaches the reel 13 via the rotor 11. To spin the fiber aggregate 8, the reel 13 is rotated. This causes the rotor 11 to be rotated by the fiber aggregate 8 on the ring 12 as well. The fiber assembly 8 is rotated by the rotation of the spool 13 and the rotor 11, thereby forming a yarn, which is wound around the spool 13 by the vertical movement of the ring rail 14.
To open the drafting device 2, the top roller can be lifted off the bottom roller. For this purpose, and for reclosing the drafting device 2, the load arm 19, to which the top roller is fixed in a known manner, is moved about the rotation point D in the direction of the arrow P.
Fig. 2 is a side view of the compression device 20 in the region of the delivery roller pair 5. The top roller 6 is pressed onto the delivery roller 7 and forms a nip point K1 with this delivery roller. The top roller 6 is fixed in a known manner to the load arm 19 by means of a load assembly 33. With the load arm 19 closed, the delivery top roller 6 is pressed against the delivery roller 7 by the load spring 22. In this embodiment, the load assembly 33 is fixed to the load arm 19 by means of a fixing element, such as a clamping screw, which is movable and fixed in the elongated hole. The securing element in particular allows a displacement of the load assembly 33 within the elongated hole. By adjusting the fixing element in the elongated hole and subsequently fixing the fixing element in the adjusted position, the position of the suction tube 17 can be changed relative to the delivery top roller 6 and relative to the delivery roller 7. This allows an optimum setting of the suction tube 17 relative to the delivery roller 7 and also of the position of the clamping point K2 on the delivery top roller 6. This makes it possible to cope with different fibre materials of the fibre assembly 8 and to find an optimum arrangement for them. Furthermore, it is ensured that the compression device 20 occupies the original position again after lifting the load arm 19 to open the drafting device 2 and reclosing the load arm 19 for weaving. The arrangement of the suction pipe 17 relative to the delivery roller pair 5, in particular relative to the delivery roller 7, remains unchanged.
A clamping point K2 is created between the top roller 6 and the suction tube 17, wherein the suction tube 17 is pressed by the spring 21 against the output top roller 6. The suction duct 17 has a suction slit 32 for sucking air. The fiber assembly 8 is bundled and compressed on the suction slit 32. In order to prevent the fibers of the fiber aggregate 8 from being sucked into the suction slot 32, the suction slot 32 is surrounded by the screen element 18. The screening element 18 surrounds the suction pipe 17. The screening element can be tensioned by means of a tensioning device or, as shown here, simply placed loosely around the suction pipe 17.
The suction pipe 17 is connected to a suction pipe 24. Air is sucked out of the suction tube 17 through the suction tube 24. The suction pipe 17 and the suction pipe 24 can be embodied in one piece in one structural unit, or the suction pipe 24 can be constructed to be flexible, for example as a flexible hose. In this embodiment, the suction pipe 17 and the suction pipe 24 are mounted on the holder 23 of the suction pipe 17. The suction pipe 17 is preferably detachably connected to the suction pipe 24, so that any dirt which may be present can be easily removed, in that the suction pipe 17 is removed from the suction pipe 24, so that the suction pipe 17 and the suction pipe 24 are easily accessible for cleaning. Preferably, the suction tube 17 is inserted into an opening of the suction tube 24 or an opening of the suction tube holder 23 and, as the case may be, is fixed there, for example by means of screws.
The draft tube 24 is resilient or is preferably detachably connected to the second portion of the draft tube 30 with a resilient connection. The second part of the draft tube 30 is fastened in particular to the machine frame, for example to a longitudinal member of the machine frame, and leads to the draft device 2 or to the suction source of the spinning machine. The second part of the draft tube 30 is arranged stationary and does not have to be embodied as movable. However, to allow the movement of the suction tube 17, the connecting element must be provided with an elastic sleeve 46, or the suction tubes 24, 30 themselves must be elastic.
In order to be able to keep the arrangement of the compression device 20 unchanged when the upper roller together with the load arm 19 is lifted from the lower roller and subsequently when the load arm 19 is reclosed, the suction tube holder 23 and the suction tube 17 are arranged on the machine frame. The suction tube holder 23 is connected to the spring 21. The spring 21, here a leg spring, presses the suction tube 17 elastically against the output top roller 6 with a predetermined force. The suction tube 17 is thus rotated about the rotation point DS on the axis 25, which simultaneously forms a fastening for the spring 21. The spring 21 is thus part of a deflectable holder for the suction tube 17, whereby the suction tube 17 is rotatably supported on the frame and can be elastically pressed against the upper roller 6.
Usually, two parallel top rollers 6 of the drafting system 2 are fixed to the load arm 19. These top rollers 6 are arranged in the form of double rollers with an axis on the load assembly 33 of the load arm 19. Each of the top rollers 6 laterally projects a load arm 19. Accordingly, the two compression devices 20 of adjacent drafting devices 2 preferably also correspond to a load arm 19. The two compression devices 20 can be embodied as one structural unit. But it can also be constructed separately and thus correspond to each drafting device 2 separately.
A first part of a support for rotating and tilting the suction tube 17 is arranged on the holder 23 of the compression device 20. In this embodiment, this first portion is the axis 25. The axis 25 is also used to house the leg spring 21. Each end of the axis 25 is inserted into a slot 26 of the base 27. The elongated hole 26 forms a second part of the support of the cage 23, which part co-acts with the first part of the support. The suction tube 17 is constructed so as to be movable relative to the base body 27 by means of a support. By arranging the leg spring 21 between the suction pipe 17 or the holder 23 of the suction pipe 17 and the base 27, the suction pipe 17 can be moved relative to the base 27. The leg spring 21 is supported with a first leg on a support element 28 of the holder 23 and with a second leg on a further support element 29 of the base body 27. The need for the leg spring 21 to relax causes the retainer 23 and the suction tube 17 to move upwardly in the view of the present invention. This movement continues until the suction tube 17 rests against the second clamping point K2 of the delivery top roller 6 or the sliding surface 31 of the suction tube 17 is active, in particular, it rests against the bottom roller 7. The sliding surface 31 is preferably formed from a friction-resistant material, in particular from plastic, ceramic and/or a friction-resistant coating.
The bearing of the holder 23 forms a rotatable/tiltable floating bearing by means of an elongated hole 26, in which the axis 25 is supported and which has a gap at least in one direction. The suction tube 17 can thus be brought to bear evenly against the output top roller 6 by rotation and by tilting relative to the longitudinal direction of the suction tube 17, which is substantially parallel to the axis of the output top roller 6. This causes the suction pipe 17 and the screen element 18 to be pressed uniformly against the delivery top roller 6, thereby compressing the fiber aggregate 8 uniformly and with high quality.
In the present embodiment, the base body 27 is screwed on the longitudinal member 42 of the spinning machine. The longitudinal member 42 extends, for example, between two punches of a spinning machine and houses in this way a plurality, for example eight, compression devices for eight spinning devices 10 arranged side by side. The longitudinal members 42 may be formed, such as extruded or rolled profile plates. The longitudinal member 42 may be formed by one or more stems, for example, disposed between the punches.
Fig. 3 shows a side view of the compression device 20 shown in fig. 2 with the pressure arm 19 lifted. In this view, the kidney-shaped cross section of the suction tube 17 can be seen very well. After the suction tube 17 no longer presses against the output top roller 6 of the drafting device 2, the spring 21 causes the base 27 and the holder 23 to rotate further and separate. In order to prevent damage to the suction tube 17 or the screening element 18 on the delivery roll 7, a sliding surface 31 is provided on the suction tube 17. Sliding surface 31 extends beyond the outer sheath of suction tube 17. The rotational movement of the holder 23 relative to the base body 27 is limited by the sliding surface 31 which serves as a stop for the suction pipe 17, so that the suction pipe 17 or the screening element 18 does not come into contact with the delivery roller 7. Excessive wear of the suction pipe 17 or the screening element 18 is prevented by the sliding surface 31.
Fig. 4 shows a front view of the two compression devices 20 shown in fig. 2. Two delivery top rollers 6 are arranged as double rollers on the load arm 19. Each of the delivery top rollers 6 is assigned a suction pipe 17, a screening element 18 and a suction slot 32. The load arm 19 is raised so that the output top roller 6 is not pressed against the suction tube 17 in this view. The delivery roller 7 has a groove 34 in each spinning position or in the region of the compression device 20. For clarity, the substrate 27 is not shown.
The suction tube 17 is deflected by the raised delivery top roller 6 and the rotatably mounted suction tube 17 to the delivery roller 7 and its grooves 34. Since the suction pipe 17 is provided with sliding surfaces 31 at both ends thereof, the suction pipe 17 is supported on the delivery roller 7 via these sliding surfaces 31. The sliding surface 31 protects the suction tube 17 from contact with the grooves 34 of the delivery roller 7. Thus, the suction duct 17, which is typically formed of aluminum or plastic, is not subject to wear due to the grinding of the flutes 34 on the suction duct 17.
In the present embodiment, the sliding surface 31 is part of a cover 35 which is arranged on both ends of the suction tube 17. Furthermore, the cover 35 closes the suction duct 17, so that the negative pressure prevailing at the suction duct 17 produces a suction effect at the suction slot 32. This enables the fiber assembly 8 to be compressed extremely efficiently.
Fig. 5 shows the suction tube 17 in the form of a double-chamber profile. Negative pressure may exist in the first chamber forming cavity 36 to supply negative pressure to suction slit 32. In the second chamber 40, a fastening element 38 can be arranged, which can be used to fasten the suction tube 17 to, for example, a socket 39 of the holder 23. By dividing the suction tube 17 into two parts, no special precautions are required to seal the fixing of the suction tube.
Fig. 6 shows a suction pipe 17 with a suction slot 32, wherein the cover 35 only closes off the cavity 36 of the suction pipe 37. The cover 35 is likewise arranged in the cavity 36 with the plug element 37 and fixed there. Alternatively, the plug element 37 may of course not be snapped into the cavity 36, but the suction tube 17 is looped around the circumference and fixed there.
Fig. 7 shows another embodiment of the present invention. The suction tube 17 is closed at its end in a conventional manner. The sliding surface 31 is part of a slider 41 arranged on the suction tube 17. The slider 41 can be fixed, for example, by a press-fit and/or form-fit connection to the suction tube 17.
Fig. 8 shows a single suction duct 17. This suction duct 17 can be part of a double-sided suction duct, wherein the suction duct is connected to a mirror-inverted suction duct, not shown here. The suction tube can also be constructed in one piece for two adjacent spinning positions, as in the previous exemplary embodiment. As a further alternative, the negative pressure source can also be connected independently of the suction tube 17 of the adjacent spinning position.
Unlike the previous embodiment, the suction pipe 17 has a cover 35 which not only closes the end of the suction pipe 17, but also comprises guides for the screening element 18. A suction slot 32 is also arranged in the cover 35. In the present embodiment, not only one sliding surface 31 is present, but two sliding surfaces 31 are provided to uniformly support the suction pipe 17. The two sliding surfaces 31 guide the screening element 18 transversely. In addition to this, the screening element 18 can slide on the outer circumference of the cover 35 and be guided there as well. The cover 35 projects with a plug element 37 into the cavity 36 of the suction tube 17 and is fixed therein. The fixing can be done by means of clips, adhesives or, for example, by means of screw connections in a form-fitting and/or press-fitting manner.
This embodiment has the advantage that the cover 35 can be replaced quickly. By using different covers 35, for example, with differently shaped suction slots 32, it is possible to meet individual requirements of the particular fibre assembly 8 or the particular yarn to be spun and to quickly adjust the spinning position when the requirements change.
The invention is not limited to the embodiments shown and described. The suction pipe 17 can in particular also be arranged rotatably on the load arm 19. The suction tube 17 is pressed against the delivery bottom roller 7 during the spinning operation. When the load arm 19 is raised, the sliding surface accordingly acts on the output top roller 6, so that the suction pipe 17 or the screen element 18 is prevented from being pressed against the output top roller 6. Other variants are also possible within the scope of the claims and the features can be combined even if they are disclosed and described in different embodiments.
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 roller
8 drafted fiber aggregate
9 wire guide
10 spinning device
11 rotor
12 ring
13 reel
14 Ring rail
15 spindle rail
16 fiber bundle region
17 suction tube
18 screening element
19 load arm
20 compression device
21 spring
22 load spring
23 holding rack
24 draft tube (first part)
25 axis
26 long hole
27 base body
28 support element
29 support element
30 draft tube (second part)
31 sliding surface
32 suction slit
33 load assembly
34 flutes
35 cover
36 cavity
37 plug element
38 fixing element
39 socket
40 second chamber
41 slider
42 longitudinal member
46 shaft sleeve
D load arm rotation point
Movement of P-load arm
DS suction tube rotation point
K1 first clamping Point
K2 second clamping point
Length of L
Width B
Angle alpha
Claims (13)
1. Suction tube for a compression device in a drafting device (2) of a spinning machine, said suction tube
-having a sheath and
-an inner cavity, and
-having a suction slit (32),
-has a guide surface for the screening element (18) surrounding the suction slot (32), and
-an opening with a suction connection for sucking the lumen and the suction slit (32),
-characterized in that the first and second parts are,
-the suction pipe (17) has a sliding surface (31) outside the guide surface of the screening element (18), and
-said sliding surface (31) radially protrudes at least partially beyond the outer periphery of the jacket of the suction duct (17).
2. Suction tube according to the preceding claim, characterized in that the suction tube (17) has at least partially a polygonal, circular, oval, triangular, half-moon or kidney-shaped cross section.
3. A suction tube according to one or more of the preceding claims, characterized in that the suction tube (17) is a double-chamber profile, wherein in the first chamber there is underpressure and in the second chamber (40) there can be arranged a fixing element (38).
4. The suction duct according to one or more of the preceding claims, characterized in that at least one extremity of said suction duct (17) is closed with a cover (35).
5. The suction tube according to one or more of the preceding claims, characterized in that said sliding surface (31) is arranged on a slide (41) on said cover (35) and/or on said suction tube (17).
6. Suction tube according to one or more of the preceding claims, characterized in that the sliding surface (31) is formed of a friction-resistant material, in particular of plastic, ceramic and/or a friction-resistant coating.
7. The suction tube according to one or more of the preceding claims, characterized in that said cover (35) is arranged, in particular inserted, in the lumen of said suction tube (17) and/or on the periphery of the sheath of said suction tube.
8. The suction pipe according to one or more of the preceding claims, characterized in that the suction slots (32) and/or the guide surfaces of the screening element (18) are arranged on the cover (35).
9. The suction tube according to one or more of the preceding claims, characterized in that said suction slit (32) has a width (B) of 0.5mm to 3.0mm and a length (L) of 2.0mm to 5.0 mm.
10. The suction tube according to one or more of the preceding claims, characterized in that said suction slits (32) are at an angle (a) of 70 ° to 110 ° with the longitudinal axis of said suction tube (17).
11. The suction tube according to one or more of the preceding claims, characterized in that two mirror-image suction tubes (17) have a common longitudinal axis and are constructed or connected in one piece.
12. Device for the pneumatic compression of a drafted fibre aggregate (8), which device has a pair of output rollers (5) formed by an output upper roller (6) and an output lower roller (7) and a screening element (18) in a drafting device (2) of a spinning machine, wherein a suction tube (17) is at least partially surrounded by the screening element (18) and a clamping point (K1) is formed by the screening element (18) with the output upper roller (6) or the output lower roller (7) in the region of a guide surface of the screening element (18), characterized in that a suction tube (17) according to one or more of the preceding claims is provided.
13. Device according to the preceding claim, characterized in that the sliding surface (31) protrudes radially beyond the outer circumference of the jacket of the suction tube (17) such that, on the one hand, with the formation of the clamping point (K1), the sliding surface (31) is not in contact with the output upper roller (6) or the output lower roller (7), and, on the other hand, with the lifting of the output upper roller (6) from the output lower roller (7), the sliding surface (31) is in contact with the output upper roller (6) or the output lower roller (7).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019115219.4A DE102019115219A1 (en) | 2019-06-05 | 2019-06-05 | Suction tube for a compression device and device for the pneumatic compression of a drawn fiber structure |
| DE1020191152194 | 2019-06-05 | ||
| PCT/EP2020/065478 WO2020245268A1 (en) | 2019-06-05 | 2020-06-04 | Suction tube for a condensing device and device for pneumatically condensing a drawn fibre composite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113994036A true CN113994036A (en) | 2022-01-28 |
| CN113994036B CN113994036B (en) | 2023-06-16 |
Family
ID=71069825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080038846.8A Active CN113994036B (en) | 2019-06-05 | 2020-06-04 | Suction tube for a compression device and device for pneumatically compressing a drawn fiber assembly |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3973093A1 (en) |
| CN (1) | CN113994036B (en) |
| DE (1) | DE102019115219A1 (en) |
| WO (1) | WO2020245268A1 (en) |
Citations (7)
| 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 |
| CN1394244A (en) * | 2000-10-23 | 2003-01-29 | 里特机械公司 | Device on spinning machine for compacting fibre bundle |
| CN1712587A (en) * | 2004-06-22 | 2005-12-28 | 株式会社丰田自动织机 | Fibre condensing device for a spinning machine |
| CN101270516A (en) * | 2006-10-11 | 2008-09-24 | 株式会社丰田自动织机 | Fiber bundle-gathering device in spinning machine |
| CN201228299Y (en) * | 2008-07-14 | 2009-04-29 | 张�育 | Integrated composite spinning gathering apparatus |
| CN103221593A (en) * | 2010-11-26 | 2013-07-24 | 里特机械公司 | Spinning machine comprising a compaction device |
| DE102012110899A1 (en) * | 2012-11-13 | 2014-05-15 | Wilhelm Stahlecker Gmbh | Insert for pneumatic compression device for compression spinning on spinning machine, has lateral guide surfaces for lateral guidance of conveyor belt in region of clamping point, particularly in lateral extension of clamping line |
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| DE19722772A1 (en) * | 1997-06-02 | 1998-12-03 | Csm Gmbh | Ring spinner drawing unit |
| DE10261785A1 (en) * | 2002-12-23 | 2004-07-01 | Wilhelm Stahlecker Gmbh | Pressure application mechanism acting on fibrous band in spinning machine, includes sliding surface spring-loaded against lower feed roller |
| DE102017130224A1 (en) * | 2017-12-15 | 2019-06-19 | Maschinenfabrik Rieter Ag | Drafting and compacting device for a spinning machine |
| CH714448A1 (en) * | 2017-12-15 | 2019-06-28 | Rieter Ag Maschf | Device and drafting system for compacting a fiber structure. |
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2019
- 2019-06-05 DE DE102019115219.4A patent/DE102019115219A1/en active Pending
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2020
- 2020-06-04 EP EP20731431.1A patent/EP3973093A1/en active Pending
- 2020-06-04 CN CN202080038846.8A patent/CN113994036B/en active Active
- 2020-06-04 WO PCT/EP2020/065478 patent/WO2020245268A1/en unknown
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| US20010020357A1 (en) * | 2000-03-08 | 2001-09-13 | Zinser Textilmaschinen Gmbh | Drafting frame for a spinning machine |
| CN1394244A (en) * | 2000-10-23 | 2003-01-29 | 里特机械公司 | Device on spinning machine for compacting fibre bundle |
| CN1712587A (en) * | 2004-06-22 | 2005-12-28 | 株式会社丰田自动织机 | Fibre condensing device for a spinning machine |
| CN101270516A (en) * | 2006-10-11 | 2008-09-24 | 株式会社丰田自动织机 | Fiber bundle-gathering device in spinning machine |
| CN201228299Y (en) * | 2008-07-14 | 2009-04-29 | 张�育 | Integrated composite spinning gathering apparatus |
| CN103221593A (en) * | 2010-11-26 | 2013-07-24 | 里特机械公司 | Spinning machine comprising a compaction device |
| DE102012110899A1 (en) * | 2012-11-13 | 2014-05-15 | Wilhelm Stahlecker Gmbh | Insert for pneumatic compression device for compression spinning on spinning machine, has lateral guide surfaces for lateral guidance of conveyor belt in region of clamping point, particularly in lateral extension of clamping line |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3973093A1 (en) | 2022-03-30 |
| WO2020245268A1 (en) | 2020-12-10 |
| DE102019115219A1 (en) | 2020-12-10 |
| CN113994036B (en) | 2023-06-16 |
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