CN111465726B - Spinning machine and compression device - Google Patents
Spinning machine and compression device Download PDFInfo
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- CN111465726B CN111465726B CN201880079988.1A CN201880079988A CN111465726B CN 111465726 B CN111465726 B CN 111465726B CN 201880079988 A CN201880079988 A CN 201880079988A CN 111465726 B CN111465726 B CN 111465726B
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- spinning machine
- roller
- suction
- suction tube
- holder
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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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- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Spinning machine having a plurality of drafting devices (2) each for drafting a fibre aggregate (8), on which upper rollers of the drafting device (2) are arranged, having a pair of delivery rollers (5) which is formed by a delivery upper roller (6) and a delivery lower roller (7) arranged therebelow, and having a longitudinal member (46) which is substantially parallel to the delivery lower roller (7), and having a pneumatic compression device (20) arranged downstream of the pair of delivery rollers (5) of the drafting device (2) for compressing the drafted fibre aggregate (8), which has a suction tube (17) which can be suctioned and which is surrounded by a sieve element (18), wherein the suction tube (17) is arranged on a holder (25) which is fixed on the machine frame (28), and is rotatably and/or movably supported.
Description
Technical Field
The invention relates to a spinning machine, comprising a plurality of drafting devices for drafting a fiber assembly (Faverband), wherein the drafting devices respectively comprise: top and bottom rollers and a load arm on which the top roller of the drafting device is arranged; the output roller pair is formed by an output upper roller and an output lower roller arranged below the output upper roller; a longitudinal part, in particular a punch seat, which extends substantially parallel to the output bottom roller; and a pneumatic compression device arranged downstream of the delivery roller pair of the drawing device for compressing the drawn fiber assembly, wherein the compression device is provided with a suction pipe capable of sucking, and the suction pipe is wound by a screening element.
Background
The drafting device for a spinning machine comprises at least two pairs of roller pairs, between which the fibre assembly is drafted on the basis of the different rotational speeds of the roller pairs. The fiber assembly thus drafted is then separated from the draft device and sent to a roller pair called a delivery roller pair of the spinning device. The delivery roller pair consists of a delivery upper roller and a delivery lower roller or a delivery cylinder, 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 pair of delivery rollers. Mechanical and pneumatic compression devices are used.
Devices of this type are known from the prior art and are always used when the fiber strand needs to be compressed after 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 how to fix a pressing element in a spinning machine. A disadvantage of this device is that the fibre aggregate can be compressed irregularly if the pressure element accidentally comes into contact with the rollers of the delivery roller pair.
Another device of the same type is described in DE 10019436 a 1. The compression device disclosed therein is also pneumatic, with a hollow profile and perforated carrying means for the compression device. The fiber aggregate leaving the delivery roller pair of the drafting device is placed on a perforated conveying member and guided by the perforated conveying member through the hollow profile. The hollow profile can be pressed against one of the rollers by means of at least one press-fit element. The design and fixing position of this press-fit element is not discussed in this publication. The disadvantage of the device disclosed is that it is not possible to ensure that the hollow profile can be pressed against the roller in a defined manner by means of only one press-fit element. Furthermore, whether the hollow profile can be pressed clearly against the delivery top roller depends on the position of the delivery top roller, which in turn depends on the arrangement of the pressure arm of the drafting device, which carries the delivery top roller.
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 characterized by the possibility of reliably compressing a fibre aggregate uniformly.
This object is achieved by a drawing device and a compression device having the features of the independent claims.
The spinning machine according to the invention has a plurality of drafting devices, each of which has a top roller and a bottom roller and a load arm, on which the top rollers of the drafting devices are arranged. The output roller pair is formed by an output upper roller and an output lower roller arranged below the output upper roller, and the output lower roller extends through a plurality of drafting devices arranged in parallel. The longitudinal parts, in particular the punch carrier, extend substantially parallel to the delivery bottom roller. And a pneumatic compression device for compressing the drafted fiber assembly is arranged at the downstream of the output roller pair of the drafting device. The compression device has a suction tube that can be aspirated. The suction pipe is wrapped by the screening element. In this way, the fibers from the fiber aggregate are not sucked by the suction pipe. The fibre assembly can be compressed uniformly and conveyed through a nip between the suction tube and the delivery upper or lower roller. The screen element is preferably a screen belt (Siebriemchen), but may also be a screen roller.
According to the invention, the suction tube is arranged on a holder fixed on the machine frame and is rotatably and/or slidably mounted. The holder ensures that the suction tube can be received and secured in a well-defined manner. By arranging the holder on the frame, the suction tube remains stationary on the drawing frame when the drawing frame is opened (i.e. the load arm is lifted). In this way, the arrangement of the suction tube relative to the delivery top roller or relative to the delivery bottom roller is also maintained after the drafting device has been opened and closed again. Thereby retaining a one-time setting. This allows the fiber assembly to be reliably and uniformly compressed. The holder gives the suction tube a well-defined position, since the holder is fixedly mounted in the spinning machine. The suction tube is arranged on the holder. Since the output bottom roller and the holder with the suction tube are both fixed on the machine frame, a clear correspondence of the suction tube to the output top roller or the output bottom roller can be achieved. This also ensures that the suction tubes lie uniformly against the delivery top roller or the delivery bottom roller. The suction pipe and the output upper roller or the output lower roller do not generate angle deviation, but are parallel to each other, thereby realizing uniform compression of the fiber assembly.
In an advantageous embodiment of the invention, the holding element is a pivotable lever. The lever is arranged in particular on a longitudinal part of the spinning machine. The longitudinal parts can fix all holders of adjacent drafting devices of the spinning machine in the same way, since they extend along all spinning positions or drafting devices.
In order to press the suction tube uniformly against one of the two rollers of the delivery roller pair, the following are advantageous: spring devices are provided which act on the suction tube and/or the holding element and press the suction tube against the output top roller or the output bottom roller. In a preferred embodiment, the compression force of the spring is also adjustable, which ensures a uniform loading of the suction tube and thus a continuous uniform compression of the fibre assembly.
In a particularly advantageous embodiment of the invention, the compression device has a fiber collection space, and the fiber collection space is defined by two clamping points. A first pinch point is defined by the two rollers of the output roller pair and a second pinch point is formed by one of the two rollers of the output roller pair and the screening element. The fibre assembly is clamped between these two clamping points and is compressed at a suction tube, which causes the fibre assembly to be sucked between the two clamping points.
In an advantageous embodiment of the invention, the holder accommodates a single straw or two straws, in particular connected to one another. Any one of the two suction pipes corresponds to one of the two adjacent drafting devices. The holder arranged on the delivery bottom roller supplies the negative pressure required by the compression device to two drafting devices arranged side by side, the top roller of which is carried by a load arm, via a suction tube. The following design is particularly simple: two suction pipes are connected to each other pneumatically or a single suction pipe is provided for two adjacent drafting devices. Thus, it is not necessary to provide two suction attachment heads for providing the suction with a negative pressure, but only one attachment head is needed for simultaneously sucking the two adjacent suction points. Of course, a suction tube can also be provided for each holding element and each drawing frame.
The following are particularly advantageous: the suction tube is mounted in the holder so as to be tiltable about a tilting axis oriented transversely to the axis of the output bottom roller, and/or the holder is mounted on the machine frame, in particular on the longitudinal part, so as to be tiltable about a tilting axis oriented transversely to the axis of the output bottom roller, so as to be oriented parallel to the axis of the output bottom roller. By means of this movable mounting, an optimum fit of the suction tube with the rollers of the delivery roller pair is ensured and uniform pressing of the delivery bottom roller or the delivery top roller is possible.
Preferably, the spring of the spring device is supported on the frame, in particular on the longitudinal part, and/or on the holder. This enables a simple and cost-effective design of the spring device.
In an advantageous embodiment, the spring device has at least one compression spring and/or at least one torsion spring in order to press the suction tube against one output top roller or two adjacent output top rollers or against the output bottom roller with a constant linear load. The spring device provides a certain elasticity of the clamping point K2, so that, for example, when a knot in the fiber aggregate is encountered, there is no need to worry about damage to the compression device, since the compression device can be avoided against the spring pressure.
In a preferred embodiment of the invention, the suction tubes can be pressed uniformly against the roller of the delivery roller pair corresponding to the suction tube if the spring devices are arranged centrally on a suction tube or between two suction tubes, or if at least one spring device is arranged laterally next to one or both suction tubes. This uniform compaction is particularly important if a particularly good yarn quality is to be obtained.
If the spring device is arranged such that the suction tube or the suction tubes are pressed along the longitudinal guide against a roller of the pair of delivery rollers, in particular the top roller, it is ensured that the suction tube does not tilt relative to this roller. This ensures that the suction tube can slide particularly flexibly against the roller.
In an advantageous embodiment, the longitudinal parts are two bars oriented toward the delivery bottom roller or are in particular wave-shaped profiles. The profile can be, for example, a drawn profile strip or a molded profiled sheet. Such a longitudinal part is easy to manufacture and may in particular already have a profile to which the holder can be fixed, preferably in a movable manner.
Preferably, the suction tube and/or the holder are connected to a tensioning device for the screening element, in particular a tilting element which is mounted elastically on the holder. The filter element wound around the suction pipe is preferably wound around the suction pipe with a defined tension. The tensioning device arranged on the suction pipe ensures that the screen element is uniformly pretensioned on the suction pipe in a defined manner.
In a preferred embodiment of the invention, the suction tube is arranged in particular detachably on a suction tube which is in particular fixed to the drawing frame. The suction tube is used to connect the suction tube to a suction source arranged in the spinning machine.
The suction tube is preferably arranged stationary on the drawing frame. The suction tube thereby connects the suction tube to a suction source which is likewise arranged immovably in the spinning machine. Alternatively or additionally, the suction tube can have a separation point, wherein a first part of the suction tube, together with the suction tube and the bearing shell, is arranged movably on the drafting device or the spinning machine and a second part is arranged in the region of the bottom roller on the drafting device or the spinning machine in a stationary, preferably elastically supported manner. Whereby a connection is established between the movable bearing shell and a fixed part of a suction device arranged in the spinning machine. Alternatively, the suction tube can also be arranged on the holder movably or fixedly. In the case of a stationary arrangement, it is necessary to establish a flexible connection with the suction device in the machine, without the mobility of the holder being restricted.
If the rotation of the lever about the longitudinal part is limited by, in particular, an adjustable stop, damage to the parts arranged on the lever is prevented. The stop also ensures that the suction tube remains in a position when the drawing frame is open, so that when the drawing frame is closed, the suction tube can again move itself into the predetermined position to form the second clamping point K2.
If the lever is fixed in the longitudinal direction of the longitudinal part, the corresponding relationship of the lever and the corresponding compression device of the drafting device can be maintained.
Preferably, each suction pipe of adjacent drawing frames corresponds to a suction pipe, or two adjacent suction pipes open into a common suction pipe, wherein the two suction pipes of adjacent drawing frames can be embodied separately or connected to one another. Thereby, the separate suction tube can be sucked independently of the adjacent suction tube. This enables individual suction of the compression device to be achieved, and if necessary also the suction of the compression device to be adjusted individually. Alternatively, the following may be set: two adjacent suction pipes open into a common suction pipe. This enables a structurally simple solution and is in most cases sufficient to achieve a uniform suction of two adjacent drafting or compression devices.
In the compression device for a drafting device of a spinning machine and having a suction tube which can be sucked, the suction tube is arranged on a holder and the holder has a fixing device in order to mount the suction tube on a longitudinal part of the spinning machine rotatably and/or slidably. The compression device can thereby be arranged on the spinning machine, so that it is possible to add a compression device to an existing drafting device. This is particularly advantageous in the case of existing spinning machines which need to be retrofitted and the drafting devices need to be improved with new compression devices.
Drawings
Further advantages of the invention are illustrated in the following examples. Wherein:
FIG. 1 is a schematic longitudinal section of a spinning machine;
FIG. 2 is a side view of the compression device;
FIG. 3 is a side view of another compression device;
FIG. 4 is a side view of another compression device;
FIG. 5 is a schematic top view of a plurality of the compression devices shown in FIG. 4;
FIG. 6 is a tilting device for the compression device shown in FIG. 4;
FIG. 7 is a front view of two parallel adjacent drafting devices with a single compression device; and
figure 8 is a front view of two parallel adjacent drafting devices with a common compression device.
Detailed Description
In the following, alternative embodiments are described, where features that are identical and/or at least similar in design and/or function are denoted by the same reference numerals. These features, if not mentioned in any more detail, are designed and/or function in accordance with the features already described above.
Fig. 1 shows a schematic longitudinal section through a spinning machine, in particular a ring spinning machine, having 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 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 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 bottom roller 7. The pinch point K2 is formed by the suction tube 17 (fig. 2) pressed against the top roller 6. 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 compression device 20 and is compressed in the compression device. Between the clamping points K1 and K2, a fiber collecting zone is provided on the suction pipe 17 having the suction slit, in which fiber collecting zone the fibers of the fiber aggregate 8 are collected or compressed. Subsequently, the fiber assembly 8 reaches the yarn guide 9 and is further guided to the spinning device 10. The spinning device 10 is mainly composed of an annular plate 14 carrying the spinning rings 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 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 plate 14.
To open the drafting device 2, the top roller can be lifted from the bottom roller. To close the drafting device again, the load arm 19, to which the top roller is fixed in a known manner, is moved about the pivot point D in the direction of the arrow 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 bears against the output bottom roller 7 and forms a clamping point K1 with the latter. The top roller 6 is fixed to the load arm 19 by means of a load cell 26 in a known manner. With the load arm 19 closed, the output top roller 6 is pressed against the output bottom roller 7 by means of the load spring 27. In this embodiment, the load unit 26 is fixed to the load arm 19 by means of a fixing element (for example a clamping screw) which is shown in a simplified manner in the drawing and can be slid in an elongated hole and fixed therein. Said fixing elements in particular allow the load unit 26 to slide inside the elongated hole. The position of the suction pipe 17 relative to the output top roller 6 and relative to the output bottom roller 7 can be changed by the displacement of the fixing element inside the elongated hole and then fixed in the position reached after the displacement. The optimum setting of the suction tube 17 relative to the output bottom roller 7 and the position of the clamping point K2 on the output top roller 6 are thus adjustable. This makes it possible to cope with different fibre materials of the fibre assembly 8 and to find an optimum arrangement for this purpose. It is furthermore ensured that: the positioning of the compression device 20 remains unchanged when the loading arm 19 is lifted to open the drafting device 2. In the process, the arrangement of the suction tube 17 relative to the delivery roller pair 5, in particular relative to the delivery bottom roller 7, is not changed.
A pinch point K2 is formed between the top roller 6 and the suction tube 17, wherein the suction tube 17 is pressed against the output top roller 6 by means of the spring 21. The suction tube 17 has a suction slit 32 through which air is sucked in. The fiber assembly 8 is collected and compressed at 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 screen element 18 is wound around the suction pipe 17 and tensioned by means of a tensioning device 22. In the present exemplary embodiment, the tensioning device 22 is fastened to the suction tube 17 or the suction tube holder 23. The tensioning device 22 can thus be moved together with the suction pipe 17, so that the movement of the suction pipe 17 has no influence on the tensioning of the screening element 18.
The suction tube 17 is connected to a suction tube 24. Air is sucked from the suction tube 17 through the suction tube 24. The suction tube 17 and the suction tube 24 may be embodied integrally as one structural unit, or, as shown here, the suction tube may be flexible, for example a flexible hose. In this embodiment, the suction tube 17, the tensioning device 22 and the suction tube 24 are fixed to a suction tube holder 23. The suction tube 17 and the suction tube 24 are preferably detachably connected to each other to facilitate removal of any contaminants that may be generated, and in particular to separate the suction tube 17 from the suction tube 24 to facilitate cleaning of the interior of the suction tube 17 and the suction tube 24. The suction tube 17 is preferably inserted into an opening of the suction tube 24 or of the suction tube holder 23 and is optionally fastened there, for example by means of screws.
The suction tube 24 is preferably detachably connected to the second part of the suction tube 30 in an elastic manner or by means of an elastic connection. The second part of the suction tube 30 is fastened by means of a clamp 31, in particular to the machine frame 28, in particular to a longitudinal part of the machine frame 28 or the drawing frame 2, and leads to the drawing frame 2 or to a suction source of the spinning machine. The second part of the suction tube 30 is arranged stationary and does not have to be embodied movable. However, in order to be able to move the suction tube 17 about the axis of the output bottom roller 7, the connecting or suction tubes 24, 30 themselves must be embodied elastically.
In order to be able to retain the arrangement of the compression device 20 when the upper roller is lifted from the lower roller by means of the load arm 19, the suction tube holder 23 and thus the suction tube 17 are arranged on the machine frame. For this purpose, the suction tube holder 23 is fixed to a spring 21, which is in turn fixed to a frame 28. The spring 21 (here, a plate spring) presses the suction pipe 17 against the output top roller 6 with a predetermined force. The suction pipe 17 is thus rotated about the spring 21 at a fixed location on the frame. The spring 21 thus forms a deflectable holder for the suction tube 17, whereby the suction tube 17 is rotatably supported on the chassis.
The top rollers 6 of the two parallel drafting devices 2 are usually fixed to a load arm 19. The top roller 6 is arranged in the manner of a tandem roller on the load cell 26 of the load arm 19 by means of a shaft 29. Each top roller 6 projects laterally beyond the load arm 19. Correspondingly, 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. However, these two compression devices can also be designed separately and thus also individually for each drawing frame 2.
Alternatively, the holder of the suction tube 17, which is designed as a spring 21, can also be fastened to a profile (longitudinal part) of the spinning machine, which profile extends in the longitudinal direction of the spinning machine. The profile may be a molded (e.g. extruded or rolled) profiled plate. However, the longitudinal parts can also be one or several rods, for example arranged between the punches.
In the embodiment of fig. 3, the spring 21 still presses the suction tube 17 against the output top roller 6 with a predetermined force. For this purpose, the spring 21 is fixed to the clip 31 and the bearing block 40. The spring 21 is fixed to the support 40 by means of a rotatable adjusting roller 41, the bias of which can be adjusted by rotation of the adjusting roller. The clip 31 is embodied so as to be movable in the vertical direction along the guide 42. If the guide allows a slight play of the gripper 31, not only a vertical movement of the holder 25 is possible, but also a slight inclination, so that the suction pipe 17 can be precisely matched to the axial orientation of the pair of delivery rollers 5. In this embodiment, the bearing block 40 and the guide 42 are arranged on the frame 28. The spring device provides a certain elasticity of the clamping point K2, so that, for example, when a knot in the fiber aggregate 8 is encountered, there is no need to worry about damage to the compression device 20, since the compression device can be avoided against the spring pressure.
The suction tube 24 is secured in the clamp 31. The suction tube 24 is rigid. In order to be able to flexibly adapt the machine-side suction device without the mobility of the suction tube 24 and the suction tube 17 being restricted, the second part of the suction tube 30 is of flexible design.
The screening element 18 is wound around the suction pipe 17 and a tension rod 44 biased by means of a compression spring 43. The compression spring 43 of the tension rod 44 is supported on the suction tube 24. In another embodiment, it may also be supported on the clamp 31 or another part of the compression device 20 that moves in conjunction with the suction tube 17.
Fig. 4 shows a side view of another embodiment of a compression device 20. The suction tube 17 is arranged in the suction tube holder 23 on a rigid suction tube 24. The suction pipe 24 is provided with a bearing 45 which carries a tension rod 44 for the screening element 18. The tension rod 44 is biased against the suction tube 24 by means of a compression spring 43.
A lever 25 is also provided on the suction tube 24. The lever 25 partially encloses a longitudinal part 46, which is designed here as a profile, extending along several drafting devices. The longitudinal part 46 is provided with a stop 47 and a bearing point 48 for the lever 25. When the lever 25 is rotated about the bearing point 48, a fulcrum point DS for the suction tube 17 is created. A stop 47 is provided to limit rotational movement.
The spring 21 arranged between the longitudinal part 46 and the suction tube 24 presses the suction tube 17 against the output top roller 6 and thus creates a pinch point K2. The rotational movement of the suction tube 24 and the suction tube 17 takes place about the fulcrum DS.
Fig. 5 shows a schematic top view of several compression devices 20 as shown in fig. 4. Each drawing frame schematically shows one delivery top roller 6 and one suction pipe 17. Two adjacent drafting devices are arranged on a load arm and carry an output top roller 6 which is designed as a double roller. One suction tube for each two compression devices 20. The longitudinal member 46 is secured between two punches 48. Four levers 25 are fixed to the longitudinal members for eight drawing frames. By this construction, the compression device 20 can be particularly conveniently fixed on the spinning machine.
Fig. 6 shows a cross section of a tilting device for the compression device 20 as shown in fig. 4. Hereby, the tiltable lever 25 is not only rotatable about the fulcrum DS shown in fig. 4, but the lever 25 is also tiltable about a horizontal axis transverse to the longitudinal axis of the longitudinal part 46 according to the double arrow K. In order to be able to exactly correspond the lever 25 in the axial direction to the position of the drawing frame, a nose 49 of the lever 25 is provided and a corresponding recess is provided in the longitudinal part 46.
The lever 25 is constructed with a chamfer in its edge region. This chamfer is constructed such that the suction tube 17 fixed to the lever 25 is inclined vertically around the longitudinal axis of the longitudinal part 46. In the horizontal direction, the lever 25 is fixed to the longitudinal part 46 without play or with at least little play. In this way, the suction ducts 17 are allowed to tilt vertically, and the suction ducts 17 are always oriented parallel to the output bottom roller 7 in the horizontal direction. This tilting movement ensures that the suction tube 17 always bears exactly against the delivery top roller 6. In particular in the case of a double unit, i.e. in the case of a lever 25 with one or two suction pipes 17, 17 'for two adjacent drafting devices 2, this ensures a precise orientation of the suction pipes 17, 17' on the surface of the delivery top roller 6. Thereby achieving a reliable spinning operation. Thus, the lever 25 is mounted on the output bottom roller 7 so as to be tiltable and rotatable and slidable along the axis of the output bottom roller 7.
Fig. 7 and 8 show two variants of the compression device 20. In both variants, two suction slots 32, 32' are shown for the delivery top roller 6 of the drafting device 2. In fig. 7, the two suction pipes 17, 17' of adjacent drafting devices of one load arm 19 are arranged independently of one another. Each suction tube 17, 17' is connected to a suction tube 24, 24' so that a negative pressure can be applied in the respective suction slit 32, 32 '. Each suction tube 17, 17' may open into its own suction tube 30, or these suction tubes may be connected to a common suction tube 30.
The suction tube holders 23, 23' are each arranged in two bearing shells 50, 50', which are connected by holders 25, 25' fixed to the machine frame 28. Springs 21, 21' are provided in the bearing bushes 50, 50' to move the straw holders 23, 23' vertically upwards. By this movement, the suction pipe 17, 17 'is pressed against the delivery top roller 6, 6'. The holders 25, 25 'allow the suction tube holders 23, 23' to be deflected differently and also enable the suction tube holders 23, 23 'to be slightly inclined so that the suction tubes 17, 17' can be accurately fitted to the delivery top roller. By the two suction pipe holders 23, 23 'being mounted independently of one another, a particularly good fit with the respective delivery top roller 6, 6' is achieved.
On each holder 25, 25', a tensioning rod 44, 44' is provided for tensioning the screening element 18, 18' by means of a compression spring not shown in the figures. The screening elements 18, 18 'thereby extend in a tensioned state around the suction pipe 17, 17'.
Fig. 8 shows a second variant of the straw holder 23. In this variant, a single suction tube 17 with two suction slits 32, 32' is provided in the suction tube holder 23. The two suction slots 32, 32' are jointly sucked by a suction tube 24. In contrast to the embodiment according to fig. 7, individual adjustment of the two underpressure on the suction slits 32, 32' is not easily possible. The device structure is simplified.
The central spring 21, which is here constructed as a helical spring, presses against the suction tube 24. In this way, the suction pipe holder 23 is pushed up together with the suction pipe 17, and a nip point K2 for the fiber aggregate 8 is formed between the suction pipe 17 and the delivery top rollers 6 and 6'. When the drafting device 2 is opened, i.e. when the top roller is moved away from the bottom roller, the suction pipe 17 remains in both bearing shells 50, 50'. In order to prevent the suction pipe 17 from accidentally popping out of the bearing bushes 50, 50', the bearing bushes 50, 50' can either be constructed high enough or a stop can be provided which can stop the suction pipe 17 in time, as in the embodiment shown in fig. 7. When the drafting device 2 is closed again, the clamping points K1 and K2 are obtained in the manner described above. This ensures that the fiber aggregate 8 is reliably woven or drawn without readjustment, for example, with regard to the spring pressure of the spring 21 on the support element 40.
In order to ensure a particularly uniform pressing of the suction pipe 17 against the two delivery top rollers 6, 6', further springs 21.1, 21.2 are provided in each bearing bush 50, 50'. These springs 21.1, 21.2 provide support for the central spring 21 and enable the suction tube 17 to be pressed particularly well against the delivery top rollers 6, 6'.
The device is constructed in accordance with the above description, wherein the features mentioned can be present individually but also in any combination.
The invention is not limited to the above-described embodiments shown in the drawings. Modifications are also possible within the scope of the claims, for example by combining features appearing in different embodiments.
Description of the 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 bundling zone
17 suction pipe
18 screening element
19 load arm
20 compression device
21 spring
22 tensioning device
23 pipette holder
24 suction pipe (first component)
25 holder, lever
26 load cell
27 loaded spring
28 frame
29 shaft
30 suction pipe (second component)
31 clip
32 suction slit
40 support base
41 adjusting roller
42 guide member
43 compression spring
44 tension rod
45 bearing
46 longitudinal parts
47 stop
48 punch
49 nose
50 bearing bush
51 adjusting element
Fulcrum of D load arm
Movement of P-load arm
K tilting motion
Fulcrum of DS suction pipe
K1 first clamping Point
K2 second clamping point
Claims (17)
1. A spinning machine has a plurality of drafting devices (2) each having:
upper and lower rollers, and
a load arm (19) on which the top roller of the drafting device (2) is arranged, a pair of delivery rollers (5) formed by a delivery top roller (6) and a delivery bottom roller (7), and
a longitudinal component (46) extending substantially parallel to the delivery bottom roller (7), a pneumatic compression device (20) arranged downstream of the delivery roller pair (5) of the drafting device (2) for compressing the drafted fiber aggregate (8),
the compression device has a suction tube (17) which can be sucked, and
the suction pipe (17) is wound by a screening element (18),
it is characterized in that the preparation method is characterized in that,
the suction pipe (17) is arranged on a holding member (25) fixed on a frame (28),
the suction pipe (17) is mounted rotatably about a bearing point (48) and/or slidably along a guide (42) and
the suction tube (17) in the holder (25) and/or the holder (25) on the machine frame (28) are mounted so as to be tiltable about a tilting axis oriented transversely to the axis of the output bottom roller (7) so as to be oriented parallel to the axis of the output bottom roller (7).
2. Spinning machine according to claim 1, characterized in that the holder (25) is a deflectable lever arranged on a longitudinal part (46) of the spinning machine.
3. Spinning machine according to claim 1 or 2, characterised in that spring means are provided which act on the suction tube (17) and/or on the holder (25) in order to press the suction tube (17) elastically against the output top roller (6).
4. Spinning machine according to claim 1,
the compression device (20) has a fiber bundling zone (16), and
the fiber bundling zone (16) is limited by two clamping points (K1, K2),
wherein a first clamping point (K1) is defined by the two rollers of the output roller pair (5) and a second clamping point (K2) is formed by one roller, which is one of the two rollers of the output roller pair (5), and the screen element (18).
5. Spinning machine according to claim 1, characterized in that the holder (25) houses one or two suction pipes (17).
6. Spinning machine according to claim 3, characterised in that the spring device is supported on the frame (28) and/or on the holder (25).
7. Spinning machine according to claim 3, characterized in that the spring device has at least one compression spring (21) and/or at least one torsion spring (21) in order to press the suction pipe (17) with a constant linear load against one output upper roller (6) or two adjacent output upper rollers or against the output lower roller (7).
8. Spinning machine according to claim 3,
the spring device is arranged centrally on one suction tube or between two suction tubes (17), or
At least one spring device is arranged laterally next to one or two suction pipes (17).
9. Spinning machine according to claim 3, characterized in that the spring device is arranged to press the suction tube or tubes (17) along the longitudinal guide against one roller of the delivery roller pair (5).
10. Spinning machine according to claim 1, characterized in that the longitudinal members (46) are two bars oriented towards the output bottom roller (7).
11. Spinning machine according to claim 1, characterized in that the suction pipe (17) and/or the holder (25) are connected with a tensioning device (22) for the screening element (18), which is elastically mounted on an inclined element on the holder (25).
12. Spinning machine according to claim 1, characterized in that the suction tube (17) is arranged on a suction tube (24) which is arranged immovably on the drafting device (2).
13. Spinning machine according to claim 1, characterized in that the suction tube (24) is arranged on the holder (25).
14. Spinning machine according to claim 1, characterized in that the rotation of the holder (25) around the longitudinal part (46) is limited by an adjustable stop (47).
15. Spinning machine according to claim 1, characterized in that the holder (25) is fixed in the longitudinal direction of the longitudinal part (46).
16. Spinning machine according to claim 1,
each suction pipe (17) of adjacent drafting devices (2) corresponds to a suction pipe (24), or
Two adjacent suction pipes (17) lead into a common suction pipe (24),
wherein the two suction pipes (17) of adjacent drafting devices (2) can be separated or connected with each other.
17. A compression device for a drafting device of a spinning machine according to any one of claims 1 to 16, having a suction tube (17) which can be sucked,
it is characterized in that the preparation method is characterized in that,
the suction pipe (17) is arranged on a holder (25) and
the holder (25) has fixing means for rotatably and slidably mounting the suction pipe (17) on a longitudinal member (46) of the spinning machine.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1020171302190 | 2017-12-15 | ||
| DE102017130219.0A DE102017130219A1 (en) | 2017-12-15 | 2017-12-15 | Spinning machine and compacting device |
| PCT/EP2018/083821 WO2019115351A1 (en) | 2017-12-15 | 2018-12-06 | Spinning machine and compaction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111465726A CN111465726A (en) | 2020-07-28 |
| CN111465726B true CN111465726B (en) | 2022-09-20 |
Family
ID=64664735
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880079988.1A Active CN111465726B (en) | 2017-12-15 | 2018-12-06 | Spinning machine and compression device |
| CN201822078245.2U Active CN209397323U (en) | 2017-12-15 | 2018-12-11 | Spinning machine and compression set |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822078245.2U Active CN209397323U (en) | 2017-12-15 | 2018-12-11 | Spinning machine and compression set |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3724386A1 (en) |
| CN (2) | CN111465726B (en) |
| DE (1) | DE102017130219A1 (en) |
| WO (1) | WO2019115351A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017130219A1 (en) * | 2017-12-15 | 2019-06-19 | Maschinenfabrik Rieter Ag | Spinning machine and compacting device |
| DE102019115220A1 (en) * | 2019-06-05 | 2020-12-10 | Maschinenfabrik Rieter Ag | Spinning machine |
| DE102019115218A1 (en) * | 2019-06-05 | 2020-12-10 | Maschinenfabrik Rieter Ag | Compaction device for a drafting system of a spinning machine and spinning machine |
| DE102020126876A1 (en) | 2020-10-13 | 2022-04-14 | Maschinenfabrik Rieter Ag | Compression device for a spinning machine |
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| JP2001279539A (en) * | 2000-03-08 | 2001-10-10 | Zinser Textilmas Gmbh | Draft system in fine spinning frame |
| 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 |
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2017
- 2017-12-15 DE DE102017130219.0A patent/DE102017130219A1/en not_active Withdrawn
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2018
- 2018-12-06 WO PCT/EP2018/083821 patent/WO2019115351A1/en unknown
- 2018-12-06 CN CN201880079988.1A patent/CN111465726B/en active Active
- 2018-12-06 EP EP18819040.9A patent/EP3724386A1/en active Pending
- 2018-12-11 CN CN201822078245.2U patent/CN209397323U/en active Active
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| DE10009487A1 (en) * | 1999-12-20 | 2001-06-21 | Stahlecker Fritz | Device fitted to spinning machine for forming yarn from tow comprises guide surface with suction slot in direction of motion of fibers, air-permeable conveyor belt carrying fibers over slot and roller pressing it against underside of guide |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111465726A (en) | 2020-07-28 |
| WO2019115351A1 (en) | 2019-06-20 |
| DE102017130219A1 (en) | 2019-06-19 |
| EP3724386A1 (en) | 2020-10-21 |
| CN209397323U (en) | 2019-09-17 |
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