CN113994036B - Suction tube for a compression device and device for pneumatically compressing a drawn fiber assembly - Google Patents
Suction tube for a compression device and device for pneumatically compressing a drawn fiber assembly Download PDFInfo
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- CN113994036B CN113994036B CN202080038846.8A CN202080038846A CN113994036B CN 113994036 B CN113994036 B CN 113994036B CN 202080038846 A CN202080038846 A CN 202080038846A CN 113994036 B CN113994036 B CN 113994036B
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- suction tube
- suction
- roller
- delivery
- sliding surface
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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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- 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 sheath, an inner space, a suction slit (32), a guide surface surrounding the suction slit (32) for a screening element (18), and an opening for a suction connection for sucking the inner space and the suction slit. The suction tube (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 tube (17). The invention also relates to a device for pneumatically compressing a drawn fiber assembly (8), comprising a corresponding suction tube, a delivery roller pair (5) and a screening element in a drawing device (2) of a spinning machine, wherein the delivery roller pair is formed by a delivery top roller (6) and a delivery bottom roller (7). The suction pipe (17) is at least partially surrounded by the screening element and forms a clamping point (K1) in the region of the guide surface of the screening element by means of the screening element and the delivery top roller (6) or the delivery bottom roller (7).
Description
Technical Field
The invention relates to a suction tube for a compression device in a drawing frame of a spinning machine, having a jacket and an interior space, having a suction slot, having a guide surface for a screening element surrounding the suction slot, and having an opening for a suction connection for sucking the interior space and the suction slot, and to a device for pneumatically compressing a drawn fiber assembly.
Background
Suction pipes of a compression device on a drafting device of a spinning machine are arranged in a manner of being connected with delivery rollers of the drafting device. The prior art discloses a large number of suction pipes for compression devices in spinning machines.
The same type of device is always used when the fibre band needs to be compressed after the drafting process in the spinning machine. Wherein the suction tube is at least partially surrounded by an apertured apron or woven screening band. A corresponding device is described, for example, in DE 102 61785a 1. The suction tube disclosed in this patent is partly surrounded by a gas-permeable conveyor belt and has a suction slit on the side facing the fibre band to be compressed. The suction tube is held between two spinning positions arranged side by side and has a suction slit for each spinning position.
EP 1,134,309 A1 attempts to design the compression device in such a way that no additional rollers for driving the air-permeable transport belt are provided. The suction tube is replaced by a suction shoe which is surrounded by a gas-permeable conveyor belt next to the deflection roller and has suction openings required for compression.
The pivotable suction tube has the disadvantage that it may come into contact with the rollers of the drafting device. Thereby, the wear of the suction pipe and even the screening ring belt increases, in which case this screening ring belt may rub on the rollers of the drafting device.
Disclosure of Invention
Accordingly, it is an object of the present invention to provide a suction tube and a compression device to minimize wear.
The solution to the above object of the invention 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 is provided with a sheath, an inner cavity and a suction slit. The suction tube further comprises a guide surface for the screening element surrounding the suction slit, and an opening of the suction connection for sucking the lumen of the suction tube and the suction slit. In order to prevent the suction tube from contacting one of the rollers of the drafting device (in particular when the suction tube is deflected) and from wearing seriously during this process, the suction tube has a sliding surface outside the guide surface of the screening element. Wherein the sliding surface protrudes radially at least partially beyond the outer circumference of the jacket of the suction tube such that the sliding surface contacts the rollers of the drafting device instead of the suction tube. Thereby protecting the material of the suction tube itself from wear. Particularly in the case of a suction tube which is brought into contact with the lower roller of the drafting device (made of steel with grooved surface), the sliding surface which is selected in particular in terms of the material fit with the lower roller is more resistant to wear than the suction tube which is usually formed of aluminum.
Advantageously, the suction tube has at least partially a polygonal, circular, oval, triangular, half-moon or kidney-shaped cross section. The suction tube can thus on the one hand optimally form a sealing zone and on the other hand optimally guide 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 are simply and preferably automatically re-separated from the screening element.
Advantageously, the suction tube is a double-chamber type, in which there is a negative pressure in the first chamber and a fixing element can be arranged in the second chamber. By dividing the profile of the suction tube in two, no special precautions need to be taken to seal the suction tube when securing the suction tube. Wherein the fixing is performed in a chamber without negative pressure. Accordingly, the negative pressure connection of the suction tube is provided only on the other chamber.
It is particularly advantageous if at least one end of the suction tube is closed off with a cover. By closing the suction tube with a cover, the suction tube, for example as an extruded profile, can be manufactured simply and the end of the suction tube can be sealed reliably.
It is also advantageous if the sliding surface is arranged on a slide on the cover and/or on the suction tube. A particularly simple solution is to integrate the sliding surface into the cover. The hood can be designed such that it protrudes beyond the outer circumference of the jacket of the suction tube, so that this protruding hood region forms a sliding surface when the suction tube is deflected in the direction of the rollers of the drawing device.
Additionally or alternatively, a slide forming a sliding surface is advantageously arranged on the suction tube. This slide can be connected in an advantageous manner to the suction tube. Wherein the slide may be connected to the suction tube by a connecting means or may 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 friction-resistant coating. The friction-resistant material is preferably selected from one of the materials that form a friction-resistant material pair with the roller of the drawing device, which material is in contact with the roller.
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 the hood is required to be in plug-in connection with the jacket of the suction tube. In the case of particularly high stresses, however, it is also advantageously possible to prevent the cover from being accidentally detached from the suction tube by means of a fixing, for example a clip, an adhesive or a screw.
Advantageously, the suction slots and/or the guide surfaces of the screening element can also be arranged on the cover. By arranging the suction slit and/or the guide surface on the cover, the suction slit and/or the guide surface can be replaced extremely quickly and easily. This provides, for example, covers with differently shaped suction slits or guide surfaces. The cover can thus incorporate different suction slits or guide surfaces to cope with the specific requirements of different fibre assemblies or yarns to be spun.
Particularly advantageously, the suction slit has a width of 0.5mm to 3.0mm and a length of 2.0mm to 5.0 mm. The suction slots of this size are particularly suitable for compression spinning, which immediately follow the delivery roller pair of the drafting device with a compression device in the form of a small suction tube. Of course, other sizes of suction slots may be used with the present invention.
Also advantageously, the suction slit makes 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 vertical line of the direction of movement of the suction tube or the fiber aggregate achieves an excellent compression of the fiber aggregate.
It is particularly advantageous if the two suction pipes arranged in mirror image have a common longitudinal axis and are integrally constructed or connected. In this case, the production and fastening of the suction tube and the connection of the negative pressure line to the suction tube are particularly simple. If the two suction pipes are constructed separately but in conjunction, it is particularly advantageous if the separation is detachable, so that, for example, the two suction pipes can be separated from one another for cleaning.
The device for pneumatically compressing a drawn fiber assembly according to the invention comprises a delivery roller pair and a screening element in a drawing device of a spinning machine, wherein the delivery roller pair is formed by a delivery top roller and a delivery bottom roller. The suction tube is at least partially surrounded by the screening element. The screening element forms a clamping point with the outlet top roller or the outlet bottom roller in the region of the guide surface of the screening element. The suction tube is constructed in accordance with one or more of the foregoing features.
The device is particularly advantageous in that the sliding surface protrudes 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 delivery top roller or the delivery bottom roller when the clamping point is formed. On the other hand, when the delivery top roller is lifted from the delivery bottom roller, the sliding surface is in contact with the delivery top roller or the delivery bottom roller. In the case of a closed drafting device, i.e. in which a clamping point is formed between the take-off top roller and the take-off bottom roller, the suction tube rests on the take-off top roller or the take-off bottom roller, while the fiber aggregate is usually located between the take-off top roller and the suction tube or the screening element. When the draft device is open, i.e. when the take-off top roller and the take-off bottom roller no longer form a clamping point, the suction tube is deflected in the direction of the take-off bottom roller. In this state, no fiber aggregate exists between the suction pipe and the take-off bottom roller, so that the suction pipe is abutted against the take-off bottom roller which is continuously rotated. This causes severe wear on the suction tube or the screening element, which wear can be prevented by the sliding surface according to the invention.
Drawings
Further advantages of the invention are described in the following description of the embodiments. Wherein:
figure 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 tube,
figure 6 is a rear view of the suction tube,
figure 7 is a rear elevational view of another suction tube
Fig. 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 terms of technical solution and/or working principle. The technical solutions and/or the working principles of these features are, unless otherwise stated, equivalent to those of the features already described above.
Fig. 1 is a schematic view of a cross section of a spinning machine, in particular a ring spinning machine with a compression device 20. Several components of the spinning machine, namely the drafting device 2 and the spinning device 10, are shown schematically. The draft device 2 is composed of three pairs of an input roller pair 3, a belt roller pair 4 and an output roller pair 5. The delivery roller pair 5 is formed by a delivery top roller 6 and a delivery roller 7. The two rollers of a roller pair are brought together and form a clamping point at their contact point, wherein the clamping point K1 is formed by the delivery roller pair 5 between the delivery top roller 6 and the delivery roller 7. The pinch point K2 is formed by the suction tube 17 (fig. 2) being able to suck 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 the respective clamping points and is drafted on the basis of the different rotational speeds of the roller pairs 3, 4 and 5. The fiber aggregate 1 is transported through the drawing device 2 while being drawn. After leaving the drawing device 2, the drawn fiber assembly 8 reaches a compressing device 20, where the fiber assembly is compressed.
Between the clamping points K1 and K2, a fiber bundling zone 16 is provided on the suction tube 17 with the suction slit 32, in which the fibers of the fiber aggregate 8 are bundled or compressed (fig. 2). The fibre assembly 8 then reaches the thread guide 9 and is led further to the spinning device 10. The spinning device 10 is mainly composed of a ring plate 14 carrying a spinning ring 12 and a spindle rail 15, to which a reel 13 is fixed. The fiber aggregate 8 reaches the reel 13 via the rotor 11. To spin the fiber aggregate 8, the spool 13 is rotated. This causes the rotor 11 to be rotated by the fibre assembly 8 on the ring 12 as well. The fiber aggregate 8 is rotated by the rotation of the reel 13 and the rotor 11, thereby forming a yarn wound around the reel 13 by the up-and-down movement of the ring plate 14.
In order to open the draft device 2, the top roller may be lifted from 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 arrow direction P.
Fig. 2 shows 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 output roller 7 and forms a nip point K1 with this output roller. The top roller 6 is fastened to the load arm 19 in a known manner 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 the present 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 long hole. The fastening element in particular allows a displacement of the load assembly 33 within the slot. By adjusting the fixing element in the slot 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 the suction pipe 17 to be optimally set with respect to the delivery roller 7, and the position of the nip point K2 on the delivery top roller 6 to be set. This allows to cope with the different fibre materials of the fibre assembly 8 and to find the best setting for this. Furthermore, it is ensured that the compression device 20 assumes the original position again after lifting the load arm 19 to open the drafting device 2 and reclosing the load arm 19 for spinning. The arrangement of the suction tube 17 relative to the delivery roller pair 5, in particular relative to the delivery roller 7, remains unchanged.
A clamping point K2 is produced between the top roller 6 and the suction tube 17, wherein the suction tube 17 is pressed against the delivery top roller 6 by the spring 21. The suction duct 17 has a suction slit 32 for sucking air in. The fiber aggregate 8 is bundled and compressed at the suction slit 32. In order to avoid sucking the fibers of the fiber aggregate 8 into the suction slot 32, the suction slot 32 is surrounded by the screen element 18. The screening element 18 surrounds the suction tube 17. The screening element may be tensioned by means of a tensioning device or, as shown here, simply placed loosely around the suction tube 17.
The suction pipe 17 is connected to the suction pipe 24. Air is sucked out of the suction tube 17 through the suction tube 24. The suction tube 17 and the suction tube 24 may be embodied integrally in one structural unit, or the suction tube 24 may be constructed to be flexible, for example as a flexible hose. In the present embodiment, the suction pipe 17 and the draft pipe 24 are mounted on the holder 23 of the suction pipe 17. The suction tube 17 is preferably detachably connected to the suction tube 24, so that any dirt that may be present can be removed simply by removing the suction tube 17 from the suction tube 24, so that the suction tube 17 as well as the suction tube 24 are easily accessible for cleaning. Preferably, the suction tube 17 is inserted into the opening of the suction tube 24 or the opening of the suction tube holder 23 and is optionally 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 suction line 30 is fastened in particular to the frame, for example to a longitudinal component of the frame, and leads to the suction source of the drawing device 2 or of the spinning machine. The second part of the draft tube 30 is arranged stationary and need not be embodied movable. However, in order to allow movement of the suction tube 17, the connection piece must be provided with an elastic sleeve 46 or the suction tube 24, 30 itself must be embodied to be elastic.
In order to be able to keep the setting of the compression device 20 unchanged when lifting the top roller from the bottom roller together with the load arm 19 and subsequently when reclosing the load arm 19, the suction tube holder 23 and the suction tube 17 are arranged on the frame. The suction tube holder 23 is connected to the spring 21. The spring 21, in this case a leg spring, presses the suction tube 17 elastically against the delivery top roller 6 with a predetermined force. Thus, the suction duct 17 rotates about the rotation point DS on the axis 25, which at the same time forms a fastener for the spring 21. The spring 21 is 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.
The top rollers 6 of the two parallel drafting devices 2 are usually fixed to the load arm 19. These top rollers 6 are arranged in the form of double rollers on the load assembly 33 of the load arm 19 by means of an axis. Each of the top rollers 6 extends laterally beyond the load arm 19. Correspondingly, two compression devices 20 of adjacent drafting devices 2 preferably also correspond to one load arm 19. The two compression devices 20 may be implemented as one structural unit. It can equally well be constructed separately so as to correspond to each drafting device 2 separately.
A first part of the 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 long hole 26 of the base 27. The slot 26 forms a second part of the support of the holder 23, which part cooperates with the first part of the support. The suction tube 17 is constructed to be movable relative to the base 27 by means of a support. By arranging the leg spring 21 between the suction tube 17 or the holder 23 of the suction tube 17 and the base 27, the suction tube 17 can be moved relative to the base 27. Wherein 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 requirement for the leg springs 21 to relax causes the holder 23 and suction tube 17 to move upwardly in the view of the present invention. This movement continues until the suction tube 17 is stopped at the second clamping point K2 of the delivery top roller 6 or the sliding surface 31 of the suction tube 17 acts, in particular, this sliding surface is stopped at the bottom roller 7. The sliding surface 31 is preferably formed from an antifriction material, in particular from a plastic, ceramic and/or antifriction coating.
The bearing of the holder 23 forms a rotatable/tiltable floating bearing by means of a slot 26 in which the axis 25 is supported, with play in at least one direction. The suction tube 17 can thereby rest uniformly on the delivery 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 delivery top roller 6. This results in a uniform compression of the suction tube 17 and the screening element 18 to the delivery top roller 6, which compresses the fibre aggregate 8 uniformly and with high quality.
In the present embodiment, the base body 27 is screwed to a longitudinal member 42 of the spinning machine. The longitudinal member 42 extends, for example, between two punches of the spinning machine and accommodates in this way a plurality of, for example eight, compression devices for eight spinning devices 10 arranged side by side. The longitudinal members 42 may be formed, for example, extruded or rolled profile plates. The longitudinal member 42 may be formed by one or more rods disposed between punches, for example.
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 well. After the suction tube 17 is no longer pressed against the delivery top roller 6 of the drafting device 2, the spring 21 rotates the base body 27 and the holder 23 further and separates. In order to prevent damage to the suction pipe 17 or the screening element 18 on the take-off roller 7, a sliding surface 31 is provided on the suction pipe 17. The sliding surface 31 protrudes beyond the outer jacket of the suction tube 17. The rotational movement of the holder 23 relative to the base body 27 is limited by the sliding surface 31 acting as a stop for the suction tube 17, so that the suction tube 17 or the screening element 18 is not in contact with the take-off roller 7. Excessive wear of the suction tube 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 on the load arm 19 as double rollers. Each of the take-off top rollers 6 is assigned a suction tube 17, a screening element 18 and a suction slit 32. The load arm 19 is lifted so that the delivery top roller 6 is not pressed to the suction tube 17 in this view. The output roller 7 has a groove 34 in the region of each spinning position or compression device 20. For clarity, the base 27 is not shown.
By means of the raised take-off top roller 6 and the rotatably mounted suction tube 17, the suction tube 17 is deflected to the take-off roller 7 and its flutes 34. Since the suction pipe 17 is provided with the sliding surfaces 31 at both ends, the suction pipe 17 is supported on the carry-out roller 7 by these sliding surfaces 31. The sliding surface 31 protects the suction duct 17 from contact with the flutes 34 of the take-off roller 7. Thus, the suction tube 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 tube 17.
In the present embodiment, the sliding surface 31 is part of a cover 35 which is arranged on both ends of the suction pipe 17. In addition, the cover 35 closes the suction tube 17, so that the negative pressure present on the suction tube 17 produces a suction effect on the suction slit 32. This makes it possible to compress the fiber aggregate 8 extremely efficiently.
Fig. 5 shows a suction tube 17 constructed as a double-chamber mold. A negative pressure may be present in the first chamber forming the cavity 36 to supply the suction slit 32 with negative pressure. A fastening element 38, which can be used to fasten the suction tube 17 to a socket 39 of the holder 23, for example, can be arranged in the second chamber 40. By dividing the suction tube 17 in two, no special precautions are required to seal the fixing location of the suction tube.
Fig. 6 shows a suction tube 17 with a suction slit 32, wherein the cover 35 only closes the cavity 36 of the suction tube 37. Here too, the cover 35 is arranged with a plug element 37 in the cavity 36 and is fixed thereto. Alternatively, the plug element 37 may of course not be snapped into the cavity 36, but rather the suction tube 17 may be snapped around the periphery and fastened there.
The suction slit 32 is at an angle alpha of 70 deg. to 110 deg. to the longitudinal axis of the suction tube. The length L of the suction slit 32 is preferably 2 to 5mm. Particularly advantageously, the width B of the suction slit 32 is in the range of 0.5 to 3 mm.
Fig. 7 shows another embodiment of the present invention. The suction tube 17 is here closed at its end in a conventional manner. The sliding surface 31 is part of a slide 41 arranged on the suction tube 17. The slide 41 can be fixed, for example, by a press-fit and/or form-fit connection with the suction tube 17.
Fig. 8 shows a single suction tube 17. This suction tube 17 may be part of a double sided suction tube, wherein the suction tube is connected with a mirror inverted suction tube, which is not shown here. The suction tube can also be constructed in one piece for two adjacent spinning positions as in the previous embodiment. As a further alternative, it is likewise possible to connect the suction tube 17 of the adjacent spinning position independently of the source of negative pressure.
Unlike the previous embodiments, the suction tube 17 has a cover 35 which not only closes the end of the suction tube 17, but also includes a guide for the screening element 18. A suction slit 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, 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 the plug element 37 into the cavity 36 of the suction tube 17 and is fixed therein. The fastening can be by means of clips, adhesives or, for example, by means of screw connections in a form-fitting and/or press-fitting manner.
An advantage of this embodiment is that the cover 35 can be quickly replaced. By using different covers 35, for example with differently shaped suction slits 32, it is possible to cope with the individualization requirements of the special fibre aggregate 8 or the special yarn to be spun and to adjust the spinning position quickly when the requirements change.
The invention is not limited to the embodiments shown and described. The suction tube 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 lifted, the sliding surface accordingly acts on the take-off top roller 6 to prevent the suction tube 17 or the screening element 18 from pressing against the take-off top roller 6. Other variations within the scope of the claims may be employed as well as combinations of features even if those features are disclosed and described in different embodiments.
Reference numeral table
1 fiber aggregate
2 drafting device
3 input roller pair
4 belt roller pair
5 output roller pair
6 output upper roller
7 output roller
8 drawn fiber assembly
9 wire guide
10 spinning device
11 rotor
12 ring
13 reel
14 ring plate
15 spindle rail
16 fiber bundle region
17 suction tube
18 screen element
19 load arm
20 compression device
21 spring
22 load spring
23 holder
24 draft tube (first part)
25 axis line
26 long hole
27 matrix
28 support element
29 support element
30 draft tube (second part)
31 sliding surface
32 suction slit
33 load assembly
34 groove pattern
35 cover cap
36 cavity
37 plug element
38 fixing element
39 socket
40 second chamber
41 slider
42 longitudinal members
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
L length
Width B
Alpha angle
Claims (16)
1. Suction tube for a compression device in a drafting device (2) of a spinning machine, said suction tube
-having a sheath
-an inner cavity
-having a suction slit (32),
-a guide surface for guiding the screening element (18) surrounding the suction slit (32), wherein the screening element (18) surrounds the suction tube (17) and
an opening with a suction connection for sucking the interior space and the suction slit (32),
-wherein the drafting device (2) comprises a delivery roller pair (5), said delivery roller pair (5) comprising a delivery top roller (6) and a delivery roller (7), and
-the screening element (18) and the outlet top roller (6) form a clamping point (K1) in the region of the guide surface of the screening element (18), -characterized in that,
-the suction tube (17) has a sliding surface (31) outside the guiding surface of the screening element (18), and
the sliding surface (31) protrudes radially at least partially beyond the outer periphery of the sheath of the suction tube (17),
-the suction tube (17) is designed to be rotatable and
-supporting the suction duct (17) on the output roller (7) of the drafting device (2) by means of a sliding surface (31) acting as a stop for the suction duct (17).
2. Suction tube according to claim 1, characterized in that the suction tube (17) has at least partly a polygonal, circular, oval, triangular, half-moon or kidney-shaped cross section.
3. Suction tube according to claim 1, characterized in that the suction tube (17) is a double-chamber type, in which there is a negative pressure in the first chamber and a fixing element (38) is arranged in the second chamber (40).
4. A suction tube according to any one of claims 1-3, characterized in that at least one end of the suction tube (17) is closed with a cover cap (35).
5. Suction tube according to claim 4, characterized in that the sliding surface (31) is arranged on the cover (35).
6. A suction tube according to any one of claims 1-3, characterized in that the sliding surface (31) is arranged on a slide (41) on the suction tube (17).
7. A suction tube according to any one of claims 1-3, characterized in that the sliding surface (31) is formed of an antifriction material.
8. Suction tube according to claim 7, characterized in that the sliding surface (31) is formed by a plastic, ceramic and/or friction-resistant coating.
9. Suction tube according to claim 4, characterized in that the cover (35) is arranged in the lumen of the suction tube (17) and/or on the outer circumference of the sheath of the suction tube.
10. Suction tube according to claim 9, characterized in that the cover (35) is inserted in the lumen of the suction tube (17) and/or on the outer circumference of the sheath of the suction tube.
11. Suction tube according to claim 4, characterized in that the suction slit (32) and/or the guide surface of the screening element (18) are arranged on the cover cap (35).
12. A suction tube according to any one of claims 1-3, characterized in that the suction slit (32) has a width (B) of 0.5mm to 3.0mm and a length (L) of 2.0mm to 5.0 mm.
13. A suction tube according to any one of claims 1-3, characterized in that the suction slit (32) is at an angle (a) of 70 ° to 110 ° to the longitudinal axis of the suction tube (17).
14. A suction tube according to any one of claims 1-3, characterized in that two suction tubes (17) arranged in mirror image have a common longitudinal axis and are constructed or connected in one piece.
15. Device for pneumatically compressing a drafted fibre assembly (8), with a delivery roller pair (5) and a screen element (18) in a drafting device (2) of a spinning machine, which delivery roller pair is formed by a delivery top roller (6) and a delivery bottom roller (7), wherein a suction tube (17) is at least partially surrounded by the screen element (18) and a clamping point (K1) is formed by the screen element (18) and the delivery top roller (6) in the region of the guide surface of the screen element (18), characterized in that a suction tube (17) according to any one of claims 1 to 14 is provided.
16. The device according to claim 15, 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, in the case of the formation of the clamping point (K1), the sliding surface (31) is not in contact with the top delivery roller (6) or the bottom delivery roller (7) and, on the other hand, in the case of the lifting of the top delivery roller (6) from the bottom delivery roller (7), the sliding surface (31) is in contact with the top delivery roller (6) or the bottom delivery 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 CN113994036A (en) | 2022-01-28 |
| CN113994036B true 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) |
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| 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 |
| JP2001279539A (en) * | 2000-03-08 | 2001-10-10 | Zinser Textilmas Gmbh | Draft system in fine spinning frame |
| 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 |
| CH714448A1 (en) * | 2017-12-15 | 2019-06-28 | Rieter Ag Maschf | Device and drafting system for compacting a fiber structure. |
| DE102017130224A1 (en) * | 2017-12-15 | 2019-06-19 | Maschinenfabrik Rieter Ag | Drafting and compacting device for a spinning machine |
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2019
- 2019-06-05 DE DE102019115219.4A patent/DE102019115219A1/en active Pending
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2020
- 2020-06-04 WO PCT/EP2020/065478 patent/WO2020245268A1/en unknown
- 2020-06-04 EP EP20731431.1A patent/EP3973093A1/en active Pending
- 2020-06-04 CN CN202080038846.8A patent/CN113994036B/en active Active
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| 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 |
| CN113994036A (en) | 2022-01-28 |
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