EP3741888A1 - Condensing unit for a drafting device of a textile machine - Google Patents
Condensing unit for a drafting device of a textile machine Download PDFInfo
- Publication number
- EP3741888A1 EP3741888A1 EP20175149.2A EP20175149A EP3741888A1 EP 3741888 A1 EP3741888 A1 EP 3741888A1 EP 20175149 A EP20175149 A EP 20175149A EP 3741888 A1 EP3741888 A1 EP 3741888A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fiber structure
- guide
- compressor unit
- wear
- unit according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004753 textile Substances 0.000 title claims abstract description 6
- 239000000835 fiber Substances 0.000 claims abstract description 148
- 230000006835 compression Effects 0.000 claims abstract description 61
- 238000007906 compression Methods 0.000 claims abstract description 61
- 239000004033 plastic Substances 0.000 claims abstract description 19
- 229920003023 plastic Polymers 0.000 claims abstract description 19
- 238000005056 compaction Methods 0.000 claims abstract description 4
- 229920006240 drawn fiber Polymers 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 238000009987 spinning Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000284 resting effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007378 ring spinning Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
Definitions
- the present invention relates to a compression unit for a drafting system of a textile machine, for compression of a ready-drawn fiber structure, the compression unit having at least one fiber structure guide and the fiber structure guide having a guide surface for the fiber structure, in the longitudinal direction of which the fiber structure can run, and a support surface arranged on the guide surface is provided for the support of the compressor unit on a drafting roller, the support surface of the fiber structure guide is made of a plastic.
- a pressure roller unit for a drafting system of a textile machine is known.
- the pressure roller unit has a base body and two non-touching pressure roller twins which are received in the base body.
- the printing roller unit also has a compression unit which is fastened to a holder.
- the compressor unit is arranged to be freely movable on the base body. Two wear-resistant components are attached to the compressor unit, which on the one hand serve for a suitable support of the compressor unit on a drafting device roller and on the other hand are intended for compressing a fiber strand supplied from a drafting device arranged in front of it.
- the compression is located on the output cylinder of the drafting system.
- the fibers are guided in the compression channel.
- the fibers all move within the channel only when its edges lie snugly on the output cylinder or are at least only a small distance from the surface of the output cylinder.
- a distance such as half the diameter of the fibers to be compacted is still acceptable. If the distance increases, there is no guarantee that the fibers will still be within the Canal stay. However, this is the prerequisite for ensuring a safe compacting process. Since the diameter of a fiber is in the range from 0.05 to 0.03 mm, very precise manufacture of the compressor is required.
- the EP 3 073 000 A1 discloses a compactor unit in which the first wear-resistant component does not sit directly on the drafting roller. As a result, it is not immediately necessary to adapt the wear-resistant component to the drafting device roller, which means that the entire compressor unit can be manufactured more cost-effectively.
- the contact surface for the drafting roller in the area of the first fiber structure guide is made of a less wear-resistant material. This less wear-resistant material, which can be plastic, for example, is able to adapt to the metal drafting roller through targeted wear. In this way, after a certain operating time, a very dense contact surface with respect to the drafting device roller is achieved.
- the second wear-resistant component is made of steel or ceramic and must therefore be manufactured very precisely in order to enable an exact adaptation to the drafting roller. Due to the length of the compressor unit, which extends over two spinning stations or drafting units arranged next to one another, the accuracy requirement is particularly difficult to meet.
- a compressor for arrangement between the output pressure roller and delivery pressure roller of a drafting system for ring spinning machines, with at least one magnet for positioning the compressor on the delivery cylinder of the drafting system is known, the compressor being made of low-wear, injectable plastic.
- the compressor being made of low-wear, injectable plastic.
- only a single fiber structure guide is provided per spinning station.
- the disadvantage of the known compressor units is that the wear-resistant components sit with their wear-resistant surfaces on the drafting roller. It is therefore required that a very precise manufacturing process the wear-resistant components must be made in order to ensure that the contact surface, which is usually curved according to the circumference of the drafting device roller, is flush with the drafting device roller.
- the contact surface may have to be adapted and adjusted to ensure that there is no inadmissibly large gap between the wear-resistant component and the drafting roller, into which fibers of the fiber structure could penetrate. This is very costly. If the support is made of a material that is subject to wear, there is a risk that the adaptation of the component to the drafting system roller is not yet optimal at the beginning of the use of the compression unit.
- the object of the present invention is thus to create a compactor unit which is inexpensive to manufacture, has a long service life and is also able to effect the compaction of a fiber structure located on a drafting roller and guided and compressed by the compactor unit as quickly as possible without errors .
- a compressor unit for a drafting system of a textile machine. It serves to compress a fully drawn fiber structure.
- the compressor unit comprises at least one fiber structure guide.
- the fiber structure guide has a compression channel in which the fiber structure is compressed.
- the compression device can also be arranged in the longitudinal direction of the fiber assembly and usually at a distance from one another, in addition to the compression channel, have a further fiber assembly guide in which the fiber assembly is deflected and / or centered in relation to the compression channel. It is also possible that one or more further fiber structure guides are provided parallel to this first and / or second fiber structure guide, which can be assigned to an adjacent drafting system.
- the fiber structure guide has a guide surface for the fiber structure and a support surface, which is arranged on the guide surface, for the support of the compressor unit on a drafting system roller.
- the fiber structure can run in the longitudinal direction of the guide surface.
- the support surface of the fiber structure guide is made of a plastic.
- the plastic can have wear-resistant properties, as a result of which the compressor unit can be used on the drafting system for a long time without the guiding properties for the fibers or the seal with respect to the drafting system roller being impaired.
- the fiber structure guide has a wear edge on its support surface along the guide surface. The wear edge ensures that only the wear edge has to be adapted to the drafting device roller in order to achieve a tight fit of the compressor unit on the drafting device roller.
- the contact surface of the compactor unit on the drafting roller is enlarged, which increases the wear life.
- the wear edge With the wear edge, the running-in time, in which the yarn may not have the desired quality, is reduced.
- the service life of the compressor unit will nevertheless be very long, since after the running-in period the wear and tear of the compressor unit progresses much more slowly than during the running-in period.
- the wear edge has a height of less than / equal to 0.2 mm, the wear edge will be adapted to the shape of the drafting unit roller after a short time and will seal the compressor unit against the drafting unit roller.
- the manufacturing inaccuracies can move in this area and there is nevertheless a very rapid adaptation to the actual shape.
- the wear edge advantageously has an initial width of less than / equal to 2 mm. This width causes rapid wear of the wear edge during operation of the spinning station, and on the other hand is a Sufficient sealing is achieved if the wear edge is adapted to the drafting roller.
- the wear edge drops, preferably gradually, from the guide surface of the fiber structure guide to the support surface.
- the wear edge can accordingly be angular or, for example, in the form of a ramp or embankment, for example straight or curved.
- the angle of the ramp or embankment can be, for example, 1 ° to 20 °.
- the ramp or embankment can taper towards the fiber structure guide or end in a plateau with a width of, for example, up to 2 mm.
- the wear edge it is also possible for the wear edge to be arcuate with a radius of preferably between 250 mm and 2500 mm.
- This gradual decrease of the wear edge towards the support surface has the effect that with increasing wear of the wear edge the width of the support surface increases and thus an increasingly improved sealing of the compressor unit against the drafting roller is achieved.
- This also has the effect that the wear takes place quickly at the beginning and thus a faster initial seal is effected.
- the sealing surface becomes larger and the wear and tear of the compression unit is reduced, until the complete contact surface of the compression unit on the drafting roller is reached.
- the support surface of the fiber structure guide is preferably made of a plastic that has sliding bearing properties. This has the effect that the overall wear on the compressor unit is very low.
- the compressor unit can thus be used for a long time. Due to the wear edge, however, at the beginning of use of the compressor unit, due to the initially small contact surface, a faster one Achieved initial wear, whereby the compression unit can adapt to the drafting system and achieve a seal. As soon as this initial wear and tear has been overcome, the service life of the compressor unit is very long due to the plastic used with sliding bearing properties and the wear is correspondingly low.
- the compression unit preferably comprises a holder on which fiber structure guides for one and / or two drafting devices are arranged.
- the compression unit with the wear rim according to the invention can be designed in such a way that it has only the compression channel for a drafting device of a spinning station or the compression channel and a further fiber structure guide for this one drafting device or this one spinning station.
- the compression unit can also be designed so that it comprises two compression channels, which are provided for two parallel-arranged drafting units or spinning units, or for the two parallel-arranged drafting units or spinning units, it includes two compression channels and two further fiber structure guides.
- the fiber structure guides are arranged on the holder such that they are spaced apart from one another in the longitudinal direction and / or transverse direction of the fiber structure guides.
- an output roller of the drafting system is often arranged between the two fiber structure guides.
- the fiber structure guides cause two parallel fiber structures to be guided in two drafting units or two spinning stations.
- the first fiber structure guide arranged first in the running direction of the fiber structure advantageously has at least one guide surface of a guide channel for the fiber structure and the second fiber structure guide arranged thereafter in the running direction of the fiber structure has at least one Guide surface of the compression channel for the fiber structure.
- the guide surface of the first fiber structure guide can also be provided so that it is used for the correct positioning of the compressor unit on the drafting system roller. Only in the event that the fiber structure to be guided has major deviations in its position, this guide surface would then come into effect in relation to the fiber structure.
- the first fiber structure guide can also have a wear-resistant guide element, which has no contact with the drafting device roller, but only has contact with the fiber structure for guiding the fiber structure.
- the support surface for the support on the drafting device roller has a curvature, the radius of which essentially corresponds to the radius of the drafting device roller on which it is to rest. This also applies to the wear edge.
- the advantage here is that the wear edge, like the support surface, does not have to be manufactured exactly, since the shape of the drafting roller is adopted after a short time due to the targeted and intended wear, in particular of the wear edge.
- the first fiber structure guide it is advantageous at least with regard to the first fiber structure guide if it has a wear-resistant component made of steel or ceramic, in particular in the form of a pin, for guiding the fiber structure.
- This wear-resistant guide element preferably has no contact with the drafting device roller, as a result of which there is no wear of the guide element due to friction with the drafting device roller, possibly due to friction with the fibers of the fiber structure.
- a support elevation is arranged on the support surface and at a distance from the wear edge.
- the raised support is also subject to wear and tear and therefore runs in at the beginning of the use of the compressor unit. Both the wear edge and the support elevation thus enable the compressor unit to be supported on the drafting roller in a stable manner at the beginning of the use of the compressor unit in spinning operation. In the course of using the compressor unit, the pad becomes more and more stable and dense due to increasing wear, without the compressor unit assuming an impermissible position.
- the support elevation has an initial support area between 0.05 and 1 mm 2 .
- the support increase is subject to rapid wear and tear and quickly adapts to the requirements for a correct position of the compressor unit.
- the support elevation slopes down towards the support surface, preferably gradually.
- the support elevation can also be designed in the form of a ramp with a point or a round or angular plateau. Alternatively, it is also possible, among other things, for it to be designed in the form of a spherical segment.
- the support surface of the support elevation thus increases with increasing wear, so that wear also takes place gradually more slowly.
- the compressor unit preferably comprises at least one receptacle for a loading element for generating a bearing force on the bearing surfaces of the compressor unit.
- the compressor unit has a wear indicator for the support surface of the fiber structure guide. This makes it easy for the operator of the spinning machine to determine whether the overall wear of the compressor unit exceeds a permissible level and can therefore replace the compressor unit in good time without the quality of the spinning result suffering.
- Figure 1 shows a side view of a compression unit 1, which is arranged above a drafting device roller 2.
- the compressor unit 1 has a first Fiber structure guide 3 and a second fiber structure guide 4. Between the first fiber structure guide 3 and the second fiber structure guide 4 and after the second fiber structure guide 4 there is a pressure roller 5 which presses a fiber structure 6 onto the lower drafting device roller 2.
- the pressure rollers 5, which form the output rollers of the drafting system, are attached to a pressure arm 7 which presses both the pressure rollers 5 and the compression unit 1 onto the drafting system roller 2.
- the first fiber structure guide 3 and the second fiber structure guide 4 are connected to one another by means of a holder 8.
- the two fiber structure guides 3 and 4 are arranged on the holder 8. You can move relative to the holder 8 or be fixed to this.
- a receptacle 9 is arranged on the holder 8, which cooperates with a loading element 10, which supports the compression unit 1 so as to be movable relative to the pressure arm 7 and thus causes the compression unit 1 to be pressed precisely and firmly onto the drafting roller 2.
- the first fiber structure guide 3 is a guide channel 11 with guide surfaces 11a and 11b (see Figure 2 ) arranged, which summarizes the fiber structure 6 slightly and presses it against the drafting roller 2.
- the second fiber structure guide 4 serves to compress the fiber structure 6 and accordingly has a compression channel 13 with guide surfaces 13a and 13b (see FIG Figure 2 ) on.
- the second fiber structure guide 4 has a support surface 15 which is designed essentially in accordance with the rounding of the drafting device roller 2 and should therefore lie snugly on the drafting device roller 2.
- the first fiber structure guide 3 also has a support surface 16 for resting on the drafting device roller 2. Both bearing surfaces 15 and 16 have a curvature with a radius r so that they can adapt to the corresponding radius of the drafting device roller 2.
- the two fiber structure guides 3 and 4 can be made of plastic together with the holder 8 and preferably also the receptacle 9. They can be made in one piece with the holder 8 or be connected to it, for example, by means of an adhesive connection. It is also possible that they are movably connected to the holder so that they can adapt to the drafting device roller.
- the receptacle 9 is used to fasten the holder 8 to the loading element 10.
- the plastic can be designed to slide particularly well.
- the bearing surfaces 15 and 16 of the fiber structure guide 3, 4 are preferably made of a plastic that has sliding bearing properties. These plastics, which are usually used for plain bearings, have particularly good wear resistance and a low sliding friction resistance in connection with steel from which the drafting device roller 2 is made. If the plastic contains a solid lubricant, a long service life is possible. If the plastic is resistant to an operating temperature of over 200 ° C., in particular at least 230 ° C., it can also be used under extreme conditions.
- the side view shows the rounded conical shape of the fiber structure guide 3 and 4 in order to be able to cling to the pressure rollers 5. Even in the case of contact with the pressure rollers 5, it is advantageous if the fiber structure guides 3 and 4 are made of plastic material, because it reduces wear and friction losses.
- the support surface 15 or 16 is integrated in the compression unit 1 and is arched so that it can nestle against the drafting device roller 2.
- FIG 2 a view from below of a compression unit 1 for two fiber structures 6 is shown.
- the compressor unit 1 of the Figure 2 is designed as a double-sided component so that two fiber structures 6, which are spun at adjacent spinning stations, can be compressed by means of a holder 8 on which two compression units 1 are arranged.
- a first, slight compression of the fiber structure 6 After this first compression of the fiber structure 6, it enters the compression channel 13 of the second fiber structure guide 4 the already pre-compressed fiber structure 6 is pressed against at least one of the guide surfaces 13a and 13b of the compression channel 13 arranged at an angle to the running direction of the fiber structure 6 and is further compacted. This creates a particularly advantageous, dense fiber structure 6 which can then be spun.
- the compressor unit 1 has a wear indicator 20 for the bearing surfaces 15 and 16 of the fiber structure guides 3 and 4.
- the wear indicator 20 is designed as a surface between the two fiber structure guides 3 and 4 in the area of the holder 8. If the bearing surfaces 15 and 16 are worn out after a long period of use in which they rest on the rotating drafting device roller 2, the compacting unit 1 is shortened in the radial direction of the drafting device roller 2. As a result, the radial distance between the bearing surfaces 15 and 16 and the wear indicator 20 is shortened or even used up entirely. In the extreme case, material is even removed from the wear indicator 20. This is the sign for an operator that the compressor unit 1 must be replaced, since the guidance of the fiber structure 6 can no longer be adequately guaranteed.
- wear edges 21 are arranged on the bearing surfaces 15 and 16, along the guide channels 11 and the guide surfaces 11a and 11b and the compression channels 13 with the guide surfaces 13a and 13b.
- the wear edges 21 protrude beyond the bearing surfaces 15 and 16, as can be seen from the following figures.
- the wear edges 21 contact the drafting device roller 2. After they protrude over the bearing surfaces 15 and 16, they are first removed by the friction with the drafting device roller 2. This very quickly becomes a Continuous contact surface with the drafting system roller 2 is created so that fibers of the fiber structure 6 can no longer be pinched between the compression unit 1 and the drafting system roller 2 or can exit from the guide channel 11 or the compression channel 13 through a gap.
- the support elevations 22 form a possibility that the compressor unit 1 can rest stably on the drafting device roller 2.
- the support elevations 22 are also intended to wear out. Accordingly, they only have a small deposit.
- a conical design of the support elevations 22 will initially result in greater wear than in the further course of use of the compressor unit 1. It may also be sufficient that only a single support elevation 22 is arranged on the holder 8.
- the support elevation 22 can also be arranged on the support surface 15 and / or 16.
- FIG 3a a section through a first fiber structure guide 3 is shown.
- a pin 12 is arranged in this fiber structure guide 3.
- the pin 12 is inserted in a receptacle which is designed as a recess. It forms the upper side of the guide 11, which is open towards the support surface 16.
- the lateral guide surfaces 11a and 11b of the guide channel 11 are formed by the plastic material of the holder 8.
- the fiber structure 6 is guided in this region of the guide channel 11, shown here as a rectangle. Since higher frictional forces are to be expected on the upper side of the guide 11 due to the fiber structure 6, it is advantageous if the pin 12 is made of steel or ceramic in order to bring about a permanent, constant guidance of the fiber structure 6. This pin 12 can be particularly advantageous when particularly aggressive materials are to be spun.
- the wear edge 21 has a height H, which is preferably a maximum of 0.2 mm.
- a width B is preferably a maximum of 2 mm.
- the angle ⁇ of the bevel of the support surface 16, shown here as a ramp can for example be in a range from 1 ° to 15 °.
- Figure 3b shows a section through an alternative first fiber structure guide 3.
- This fiber structure guide 3 is constructed similarly to the embodiment according to FIG Figure 3a , but has no steel or ceramic pin 12. For normal applications with a less aggressive fiber material, this design is sufficient, especially when a plastic is used that is also used for slide bearings.
- the respective wear edge 21 is convex in this embodiment.
- a radius R in a range between 250 mm and 2500 mm is advantageous here. In this embodiment, too, the wear occurs at the beginning of the use of the compressor unit 1 and gradually decreases. The exact adaptation of the compression unit 1 to the drafting device roller 2 thus takes place very quickly, without causing permanent heavy wear on the compression unit 1.
- the compression unit 1 only comprises the second fiber structure guide 4 with a compression channel 13. In some compression spinning processes, such compression of the fiber structure 6 is sufficient.
- the fiber structure guide 4 has an elevation in the form of a wear edge 21 opposite the support surface 15. Here, too, the wear edge 21 is first removed when the fiber structure guide 4 is used for the first time. A quick sealing of the fiber structure guide 4 with respect to the drafting roller 2 is achieved.
- FIG 5 a front view of a compression unit 1 for two fiber structures 6 is shown.
- the respective second fiber structure guide 4 of the two parallel drafting units can be seen.
- the compression channels 13 are open to the drafting roller 2.
- the compression unit 1 rests with the wear edges 21 and the support elevations 22 on the drafting system roller 2.
- the receptacle 9, with which the holder 8 can be fastened to the loading element 10, is arranged between the fiber structure guides 4.
- the holder 8 can also rest on the drafting device roller 2.
- a better support of the compressor unit 1 on the drafting device roller 2 is obtained if only the wear edges 21 and the support elevations 22 or, after running in, the bearing surfaces 15 and 16 rest on the drafting device roller 2.
- the surface with which the compressor unit 1 rests on the drafting device roller 2 becomes larger until the bearing surfaces 15 or 16 are largely in full contact with the drafting device roller 2. Further wear is then minimized since the largest possible contact surface with the drafting device roller 2 is present.
- the rapid wear of the wear edges 21 results in a very rapid sealing of the compression channel 13 with respect to the drafting device roller 2. If the contact surfaces 15 or 16 wear out, can be recognized from the reduced depth of the wear indicator 20 that the compressor unit 1 must be replaced.
- both guide channel 11 and compression channel 13 can be designed with only one guide surface 11a or 11b or 13a or 13b. It is expressly pointed out that a combination of the features, even if these are shown and described in different exemplary embodiments, are included within the scope of the applicable patent claims.
- the device is designed according to the preceding description, it being possible for the features mentioned to be present individually or in any combination.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Die Erfindung betrifft eine Verdichtereinheit für ein Streckwerk einer Textilmaschine, zum Verdichten eines fertig verzogenen Faserverbandes (6), wobei die Verdichtereinheit (1) zumindest eine Faserverbandführung (3, 4) aufweist, und die Faserverbandführung (3, 4) eine Führungsfläche (11a, 11b; 13a, 13b) für den Faserverband (6) aufweist, in deren Längsrichtung der Faserverband (6) verlaufen kann, und eine an der Führungsfläche (11a, 11b; 13a, 13b) angeordnete Auflagefläche (15, 16) für die Auflage der Verdichtereinheit (1) auf einer Streckwerkswalze (2) vorgesehen ist, wobei die Auflagefläche (15, 16) der Faserverbandführung (3, 4) aus einem Kunststoff hergestellt ist, dadurch gekennzeichnet, dass die Faserverbandführung (3, 4) an deren Auflagefläche (15, 16) entlang der Führungsfläche (11a, 11b; 13a, 13b) einen Verschleißrand (21) aufweist.The invention relates to a compression unit for a drafting system of a textile machine, for compressing a fully drawn fiber structure (6), the compression unit (1) having at least one fiber structure guide (3, 4) and the fiber structure guide (3, 4) a guide surface (11a, 11b; 13a, 13b) for the fiber structure (6), in the longitudinal direction of which the fiber structure (6) can run, and a supporting surface (15, 16) arranged on the guide surface (11a, 11b; 13a, 13b) for supporting the Compaction unit (1) is provided on a drafting roller (2), the support surface (15, 16) of the fiber structure guide (3, 4) being made of a plastic, characterized in that the fiber structure guide (3, 4) on its support surface (15 , 16) has a wear edge (21) along the guide surface (11a, 11b; 13a, 13b).
Description
Die vorliegende Erfindung betrifft eine Verdichtereinheit für ein Streckwerk einer Textilmaschine, zum Verdichten eines fertig verzogenen Faserverbandes, wobei die Verdichtereinheit zumindest eine Faserverbandführung aufweist und die Faserverbandführung eine Führungsfläche für den Faserverband aufweist, in deren Längsrichtung der Faserverband verlaufen kann und eine an der Führungsfläche angeordnete Auflagefläche für die Auflage der Verdichtereinheit auf einer Streckwerkswalze vorgesehen ist, wobei die Auflagefläche der Faserverbandführung aus einem Kunststoff hergestellt ist.The present invention relates to a compression unit for a drafting system of a textile machine, for compression of a ready-drawn fiber structure, the compression unit having at least one fiber structure guide and the fiber structure guide having a guide surface for the fiber structure, in the longitudinal direction of which the fiber structure can run, and a support surface arranged on the guide surface is provided for the support of the compressor unit on a drafting roller, the support surface of the fiber structure guide is made of a plastic.
Aus der
Beim diesem mechanischen Verdichten liegt der Verdichter auf dem Ausgangszylinder des Streckwerks. Bei der Kompaktierung werden die Fasern in dem Verdichtungskanal geführt. Die Fasern bewegen sich allerdings nur dann alle innerhalb des Kanals, wenn dessen Ränder auf dem Ausgangszylinder satt aufliegen oder aber zumindest nur einen kleinen Abstand zur Oberfläche des Ausgangszylinders haben. Akzeptabel ist hierbei noch ein Abstand wie etwa der halbe Durchmesser der zu kompaktierenden Fasern. Wenn der Abstand größer wird, ist nicht sichergestellt, dass die Fasern noch innerhalb des Kanals bleiben. Dies ist jedoch die Voraussetzung für die Gewährleistung eines sicheren Kompaktiervorganges. Da der Durchmesser einer Faser im Bereich von 0,05 bis 0,03 mm liegt, ist eine sehr genaue Herstellung des Verdichters erforderlich.With this mechanical compression, the compression is located on the output cylinder of the drafting system. During compaction, the fibers are guided in the compression channel. However, the fibers all move within the channel only when its edges lie snugly on the output cylinder or are at least only a small distance from the surface of the output cylinder. A distance such as half the diameter of the fibers to be compacted is still acceptable. If the distance increases, there is no guarantee that the fibers will still be within the Canal stay. However, this is the prerequisite for ensuring a safe compacting process. Since the diameter of a fiber is in the range from 0.05 to 0.03 mm, very precise manufacture of the compressor is required.
Die
Aus der
Nachteilig bei den bekannten Verdichtereinheiten ist es, dass die verschleißfesten Bauteile mit ihren verschleißfesten Oberflächen auf der Streckwerkswalze aufsitzen. Es ist daher erforderlich, dass eine sehr genaue Fertigung der verschleißfesten Bauteile erfolgen muss, um zu gewährleisten, dass die Auflagefläche, welche in der Regel entsprechend dem Umfang der Streckwerkswalze gewölbt ist, bündig mit der Streckwerkswalze abschließt. Die Auflagefläche muss gegebenenfalls angepasst und eingestellt werden, um zu gewährleisten, dass kein unzulässig großer Spalt zwischen dem verschleißfesten Bauteil und der Streckwerkswalze entsteht, in welchen Fasern des Faserverbandes eindringen könnten. Dies ist sehr kostenintensiv. Ist die Auflage aus einem verschleißenden Material hergestellt, so besteht die Gefahr, dass zu Beginn des Einsatzes der Verdichtereinheit die Anpassung des Bauteiles an die Streckwerkswalze noch nicht optimal ist. Erst durch eine längere Benutzung des Verdichters nutzt sie sich derart ab, dass sie die Kontur der Streckwerkswalze annimmt. Bis dahin wird nur ein deutlich schlechteres Spinnergebnis erzielt, da die Fasern nur sehr unzureichend kompaktiert werden. Es wird dementsprechend ein schlechtes Garn gesponnen. Ein Verdichter mit einer niedrigen Verschleißfestigkeit würde sich zwar relativ schnell an den Durchmesser des Ausgangszylinders anpassen, würde aber auch nach kurzer Zeit verschleißen. Dies würde der Forderung einer langen Lebensdauer eines Verdichters zuwiderlaufen.The disadvantage of the known compressor units is that the wear-resistant components sit with their wear-resistant surfaces on the drafting roller. It is therefore required that a very precise manufacturing process the wear-resistant components must be made in order to ensure that the contact surface, which is usually curved according to the circumference of the drafting device roller, is flush with the drafting device roller. The contact surface may have to be adapted and adjusted to ensure that there is no inadmissibly large gap between the wear-resistant component and the drafting roller, into which fibers of the fiber structure could penetrate. This is very costly. If the support is made of a material that is subject to wear, there is a risk that the adaptation of the component to the drafting system roller is not yet optimal at the beginning of the use of the compression unit. Only after prolonged use of the compressor does it wear out to such an extent that it takes on the contour of the drafting device roller. Until then, only a significantly poorer spinning result is achieved, since the fibers are only very inadequately compacted. A bad yarn is spun accordingly. A compressor with a low wear resistance would adapt relatively quickly to the diameter of the output cylinder, but would also wear out after a short time. This would run counter to the requirement for a long life of a compressor.
Aufgabe der vorliegenden Erfindung ist es somit, eine Verdichtereinheit zu schaffen, welche kostengünstig herzustellen ist, eine lange Lebensdauer hat und darüber hinaus in der Lage ist, die Verdichtung eines auf einer Streckwerkswalze befindlichen und durch die Verdichtereinheit geführten und verdichteten Faserverbandes möglichst schnell fehlerfrei zu bewirken.The object of the present invention is thus to create a compactor unit which is inexpensive to manufacture, has a long service life and is also able to effect the compaction of a fiber structure located on a drafting roller and guided and compressed by the compactor unit as quickly as possible without errors .
Die Aufgabe wird gelöst durch eine Verdichtereinheit mit den Merkmalen des unabhängigen Patentanspruchs 1.The object is achieved by a compressor unit with the features of
Eine erfindungsgemäße Verdichtereinheit ist für ein Streckwerk einer Textilmaschine vorgesehen. Sie dient der Verdichtung eines fertig verzogenen Faserverbandes. Die Verdichtereinheit umfasst dabei zumindest eine Faserverbandführung. Die Faserverbandführung weist einen Verdichtungskanal auf, in dem der Faserverband komprimiert wird. Die Verdichtungseinrichtung kann darüber hinaus auch noch in Längsrichtung des Faserverbands und meist voneinander beabstandet angeordnet, zusätzlich zu dem Verdichtungskanal eine weitere Faserverbandführung aufweisen, in welcher der Faserverband umgelenkt und/oder in Bezug auf den Verdichtungskanal zentriert wird. Außerdem ist es möglich, dass parallel zu dieser ersten und oder zweiten Faserverbandführung eine oder mehrere weitere Faserverbandführungen vorgesehen sind, welche einem benachbarten Streckwerk zugeordnet sein können.A compressor unit according to the invention is provided for a drafting system of a textile machine. It serves to compress a fully drawn fiber structure. The compressor unit comprises at least one fiber structure guide. The fiber structure guide has a compression channel in which the fiber structure is compressed. The compression device can also be arranged in the longitudinal direction of the fiber assembly and usually at a distance from one another, in addition to the compression channel, have a further fiber assembly guide in which the fiber assembly is deflected and / or centered in relation to the compression channel. It is also possible that one or more further fiber structure guides are provided parallel to this first and / or second fiber structure guide, which can be assigned to an adjacent drafting system.
Die Faserverbandführung weist eine Führungsfläche für den Faserverband und eine an der Führungsfläche angeordnete Auflagefläche für die Auflage der Verdichtereinheit auf einer Streckwerkswalze auf. In Längsrichtung der Führungsfläche kann der Faserverband verlaufen. Die Auflagefläche der Faserverbandführung ist aus einem Kunststoff hergestellt. Der Kunststoff kann verschleißfeste Eigenschaften aufweisen, wodurch die Verdichtereinheit lange Zeit an dem Streckwerk verwendet werden kann, ohne dass die Führungseigenschaften für die Fasern oder die Abdichtung gegenüber der Streckwerkswalze verschlechtert wird.The fiber structure guide has a guide surface for the fiber structure and a support surface, which is arranged on the guide surface, for the support of the compressor unit on a drafting system roller. The fiber structure can run in the longitudinal direction of the guide surface. The support surface of the fiber structure guide is made of a plastic. The plastic can have wear-resistant properties, as a result of which the compressor unit can be used on the drafting system for a long time without the guiding properties for the fibers or the seal with respect to the drafting system roller being impaired.
Um einerseits zu vermeiden, dass die Herstellung der Faserverbandführung sehr exakt erfolgen muss, um eine Abdichtung der Faserverbandführung gegenüber der Streckwerkswalze zu erzielen, und um andererseits zu vermeiden, dass eine zu lange Zeit benötigt wird, bis die Faserverbandführung soweit eingelaufen ist, dass sie sich an die Streckwerkswalze angepasst hat und damit keine Fasern mehr zwischen der Faserverbandführung und der Streckwerkswalze eingeklemmt werden oder die Führung verlassen, ist erfindungsgemäß vorgesehen, dass die Faserverbandführung an deren Auflagefläche entlang der Führungsfläche einen Verschleißrand aufweist. Durch den Verschleißrand wird gewährleistet, dass lediglich der Verschleißrand an die Streckwerkswalze angepasst werden muss, um ein enges Anliegen der Verdichtereinheit auf der Streckwerkswalze zu erreichen. Der Verschleiß dieses für den Verschleiß vorgesehenen Randes der Faserverbandführung erfolgt wesentlich schneller, als wenn die komplette spätere Auflagefläche angepasst werden müsste. Sobald der Verschleißrand an die Streckwerkswalze angepasst ist, wird eine gute Abdichtung erzielt, sodass keine Fasern mehr zwischen der Streckwerkswalze und der Faserverbandführung eingeklemmt werden oder die Führung verlassen können.On the one hand to avoid that the production of the fiber structure guide has to be carried out very precisely in order to achieve a seal between the fiber structure guide and the drafting roller and, on the other hand, to avoid that it takes too long for the fiber structure guide to run in so far that it fits has adapted to the drafting roller and thus no more fibers are jammed between the fiber structure guide and the drafting roller or leave the guide, is according to the invention provided that the fiber structure guide has a wear edge on its support surface along the guide surface. The wear edge ensures that only the wear edge has to be adapted to the drafting device roller in order to achieve a tight fit of the compressor unit on the drafting device roller. The wear of this edge of the fiber structure guide provided for wear takes place much faster than if the entire subsequent support surface would have to be adapted. As soon as the wear edge has been adapted to the drafting system roller, a good seal is achieved so that no more fibers are trapped between the drafting system roller and the fiber structure guide or can leave the guide.
Nachdem der Verschleißrand eine Abdichtung erzeugt, wird die Auflagefläche der Verdichtereinheit auf der Streckwerkswalze vergrößert, wodurch die Verschleißdauer verlängert wird. Hierdurch ergibt sich eine lange Nutzungsdauer der Verdichtereinheit, da der Verschleiß gegenüber der Anfangsphase deutlich reduziert wird. Mit dem Verschleißrand verringert sich somit die Einlaufzeit, in welcher das Garn unter Umständen nicht die gewünschte Qualität aufweist. Die Standzeit der Verdichtereinheit wird dennoch sehr hoch sein, da nach der Einlaufzeit der Verschleiß der Verdichtereinheit wesentlich langsamer voranschreitet als während der Einlaufzeit.After the wear edge creates a seal, the contact surface of the compactor unit on the drafting roller is enlarged, which increases the wear life. This results in a long service life of the compressor unit, since the wear is significantly reduced compared to the initial phase. With the wear edge, the running-in time, in which the yarn may not have the desired quality, is reduced. The service life of the compressor unit will nevertheless be very long, since after the running-in period the wear and tear of the compressor unit progresses much more slowly than during the running-in period.
Weist in einer vorteilhaften Ausführung der Erfindung der Verschleißrand eine Höhe von kleiner/gleich 0,2 mm auf, so wird bereits nach kurzer Zeit der Verschleißrand an die Form der Streckwerkswalze angepasst sein und eine Abdichtung der Verdichtereinheit gegenüber der Streckwerkswalze bewirken. Die Fertigungsungenauigkeiten können sich in diesem Bereich bewegen und es erfolgt dennoch eine sehr schnelle Anpassung an die tatsächliche Form.If, in an advantageous embodiment of the invention, the wear edge has a height of less than / equal to 0.2 mm, the wear edge will be adapted to the shape of the drafting unit roller after a short time and will seal the compressor unit against the drafting unit roller. The manufacturing inaccuracies can move in this area and there is nevertheless a very rapid adaptation to the actual shape.
Vorteilhafterweise hat der Verschleißrand eine anfängliche Breite von kleiner/gleich 2 mm. Durch diese Breite wird eine schnelle Abnutzung des Verschleißrandes im Betrieb der Spinnstelle bewirkt, und andererseits wird eine ausreichende Abdichtung erzielt, wenn der Verschleißrand an die Streckwerkswalze angepasst ist.The wear edge advantageously has an initial width of less than / equal to 2 mm. This width causes rapid wear of the wear edge during operation of the spinning station, and on the other hand is a Sufficient sealing is achieved if the wear edge is adapted to the drafting roller.
In einer besonders vorteilhaften Ausführung der Erfindung fällt der Verschleißrand von der Führungsfläche der Faserverbandführung zur Auflagefläche hin, vorzugsweise allmählich, ab. Dies bedeutet, dass der Verschleißrand an der Faserverbandführung, insbesondere an dem Verdichtungskanal, höher ausgebildet ist, als im Bereich der späteren Auflagefläche der Verdichtereinheit. Der Verschleißrand kann dementsprechend kantig ausgeführt sein oder beispielsweise in Form einer Rampe bzw. Böschung, beispielsweise geradlinig oder bogenförmig ausgebildet sein. Der Winkel der Rampe bzw. Böschung kann beispielsweise 1° bis 20° betragen. Die Rampe bzw. Böschung kann spitz zur Faserverbandführung hin zulaufen oder in einem Plateau mit einer Breite von beispielsweise bis zu 2 mm enden. Alternativ ist es auch möglich, dass der Verschleißrand bogenförmig mit einem Radius von vorzugsweise zwischen 250 mm und 2500 mm ausgebildet ist. Dieser allmähliche Abfall des Verschleißrandes zur Auflagefläche hin bewirkt, dass mit zunehmenden Verschleiß des Verschleißrandes die Breite der Auflagefläche zunimmt und somit eine zunehmend verbesserte Abdichtung der Verdichtereinheit gegenüber der Streckwerkswalze erzielt wird. Dabei wird außerdem bewirkt, dass der Verschleiß am Anfang schnell stattfindet und somit eine schnellere anfängliche Abdichtung bewirkt wird. Mit zunehmender Laufzeit wird die Abdichtungsfläche immer größer und der Verschleiß der Verdichtereinheit immer geringer, so lange, bis die komplette Auflagefläche der Verdichtereinheit auf der Streckwerkswalze erreicht ist.In a particularly advantageous embodiment of the invention, the wear edge drops, preferably gradually, from the guide surface of the fiber structure guide to the support surface. This means that the wear edge on the fiber structure guide, in particular on the compression channel, is formed higher than in the area of the subsequent support surface of the compression unit. The wear edge can accordingly be angular or, for example, in the form of a ramp or embankment, for example straight or curved. The angle of the ramp or embankment can be, for example, 1 ° to 20 °. The ramp or embankment can taper towards the fiber structure guide or end in a plateau with a width of, for example, up to 2 mm. Alternatively, it is also possible for the wear edge to be arcuate with a radius of preferably between 250 mm and 2500 mm. This gradual decrease of the wear edge towards the support surface has the effect that with increasing wear of the wear edge the width of the support surface increases and thus an increasingly improved sealing of the compressor unit against the drafting roller is achieved. This also has the effect that the wear takes place quickly at the beginning and thus a faster initial seal is effected. As the running time increases, the sealing surface becomes larger and the wear and tear of the compression unit is reduced, until the complete contact surface of the compression unit on the drafting roller is reached.
Vorzugsweise ist die Auflagefläche der Faserverbandführung aus einem Kunststoff hergestellt, der Gleitlagereigenschaften aufweist. Damit wird bewirkt, dass der Verschleiß der Verdichtereinheit insgesamt sehr gering ist. Die Verdichtereinheit kann somit über eine lange Zeit eingesetzt werden. Durch den Verschleißrand wird dennoch zu Beginn des Einsatzes der Verdichtereinheit aufgrund der anfänglich geringen Auflagefläche ein schneller Anfangsverschleiß erzielt, wodurch sich die Verdichtereinheit an das Streckwerk anpassen kann und eine Abdichtung erzielt. Sobald dieser Anfangsverschleiß überwunden ist, ist die Standzeit der Verdichtereinheit aufgrund des eingesetzten Kunststoffes mit Gleitlagereigenschaften sehr hoch und der Verschleiß entsprechend gering.The support surface of the fiber structure guide is preferably made of a plastic that has sliding bearing properties. This has the effect that the overall wear on the compressor unit is very low. The compressor unit can thus be used for a long time. Due to the wear edge, however, at the beginning of use of the compressor unit, due to the initially small contact surface, a faster one Achieved initial wear, whereby the compression unit can adapt to the drafting system and achieve a seal. As soon as this initial wear and tear has been overcome, the service life of the compressor unit is very long due to the plastic used with sliding bearing properties and the wear is correspondingly low.
Vorzugsweise umfasst die Verdichtereinheit einen Halter, an dem Faserverbandführungen für ein und/oder zwei Streckwerke angeordnet sind. Die Verdichtereinheit mit dem erfindungsgemäßen Verschleißrand kann derart ausgebildet sein, dass sie nur den Verdichtungskanal für ein Streckwerk einer Spinnstelle oder den Verdichtungskanal und eine weitere Faserverbandführung für dieses eine Streckwerk bzw. diese eine Spinnstelle aufweist. Die Verdichtereinheit kann aber auch so ausgebildet sein, dass sie zwei Verdichtungskanäle umfasst, welche für zwei parallel angeordnete Streckwerke bzw. Spinnstellen vorgesehen sind, oder für die zwei parallel angeordneten Streckwerke bzw. Spinnstellen sowohl zwei Verdichtungskanäle als auch zwei weitere Faserverbandführungen umfasst.The compression unit preferably comprises a holder on which fiber structure guides for one and / or two drafting devices are arranged. The compression unit with the wear rim according to the invention can be designed in such a way that it has only the compression channel for a drafting device of a spinning station or the compression channel and a further fiber structure guide for this one drafting device or this one spinning station. The compression unit can also be designed so that it comprises two compression channels, which are provided for two parallel-arranged drafting units or spinning units, or for the two parallel-arranged drafting units or spinning units, it includes two compression channels and two further fiber structure guides.
In einer vorteilhaften Ausführung der Erfindung sind die Faserverbandführungen so an dem Halter angeordnet, dass sie in Längsrichtung und/oder Querrichtung der Faserverbandführungen voneinander beabstandet sind. In Längsrichtung, d. h. in Laufrichtung des Faserverbandes, ist häufig zwischen den beiden Faserverbandführungen eine Ausgangswalze des Streckwerks angeordnet. In Querrichtung, d. h. quer zur Laufrichtung des Faserverbandes, bewirken die Faserverbandführungen die Führung zweier parallel verlaufender Faserverbände in zwei Streckwerken bzw. zwei Spinnstellen.In an advantageous embodiment of the invention, the fiber structure guides are arranged on the holder such that they are spaced apart from one another in the longitudinal direction and / or transverse direction of the fiber structure guides. In the longitudinal direction, i.e. H. in the running direction of the fiber structure, an output roller of the drafting system is often arranged between the two fiber structure guides. In the transverse direction, i.e. H. across the running direction of the fiber structure, the fiber structure guides cause two parallel fiber structures to be guided in two drafting units or two spinning stations.
Vorteilhafterweise weist die in Laufrichtung des Faserverbandes zuerst angeordnete erste Faserverbandführung wenigstens eine Führungsfläche eines Führungskanals für den Faserverband und die in Laufrichtung des Faserverbandes danach angeordnete zweite Faserverbandführung wenigstens eine Führungsfläche des Verdichtungskanals für den Faserverband auf. Die Führungsfläche der ersten Faserverbandführung kann dabei auch dafür vorgesehen sein, dass sie für die ordnungsgemäße Positionierung der Verdichtereinheit auf der Streckwerkswalze dient. Nur für den Fall, dass der zu führende Faserverband in seiner Position starke Abweichungen aufweist, käme dann diese Führungsfläche in Bezug auf den Faserverband zur Wirkung. Die erste Faserverbandführung kann darüber hinaus auch ein verschleißfestes Führungselement aufweisen, welches keinen Kontakt zur Streckwerkswalze, sondern ausschließlich einen Kontakt mit dem Faserverband zur Führung des Faserverbandes hat.The first fiber structure guide arranged first in the running direction of the fiber structure advantageously has at least one guide surface of a guide channel for the fiber structure and the second fiber structure guide arranged thereafter in the running direction of the fiber structure has at least one Guide surface of the compression channel for the fiber structure. The guide surface of the first fiber structure guide can also be provided so that it is used for the correct positioning of the compressor unit on the drafting system roller. Only in the event that the fiber structure to be guided has major deviations in its position, this guide surface would then come into effect in relation to the fiber structure. The first fiber structure guide can also have a wear-resistant guide element, which has no contact with the drafting device roller, but only has contact with the fiber structure for guiding the fiber structure.
In ganz besonders vorteilhafter Ausführung der Erfindung weist die Auflagefläche für die Auflage auf der Streckwerkswalze eine Wölbung auf, deren Radius im Wesentlichen dem Radius der Streckwerkswalze entspricht, auf der sie aufliegen soll. Dies gilt ebenso für den Verschleißrand. Der Vorteil hierbei ist, dass der Verschleißrand ebenso wie die Auflagefläche nicht exakt gefertigt werden muss, da durch den gezielten und beabsichtigten Verschleiß, insbesondere des Verschleißrandes, die Form der Streckwerkswalze bereits nach kurzer Zeit übernommen wird.In a particularly advantageous embodiment of the invention, the support surface for the support on the drafting device roller has a curvature, the radius of which essentially corresponds to the radius of the drafting device roller on which it is to rest. This also applies to the wear edge. The advantage here is that the wear edge, like the support surface, does not have to be manufactured exactly, since the shape of the drafting roller is adopted after a short time due to the targeted and intended wear, in particular of the wear edge.
Insbesondere ist es zumindest in Bezug auf die erste Faserverbandführung vorteilhaft, wenn sie ein verschleißfestes Bauteil aus Stahl oder Keramik, insbesondere in Form eines Stiftes, zur Führung des Faserverbandes aufweist. Dieses verschleißfeste Führungselement hat vorzugsweise keinen Kontakt zur Streckwerkswalze, wodurch kein Verschleiß des Führungselements durch eine Reibung mit der Streckwerkswalze, allenfalls durch Reibung mit den Fasern des Faserverbandes, entsteht.In particular, it is advantageous at least with regard to the first fiber structure guide if it has a wear-resistant component made of steel or ceramic, in particular in the form of a pin, for guiding the fiber structure. This wear-resistant guide element preferably has no contact with the drafting device roller, as a result of which there is no wear of the guide element due to friction with the drafting device roller, possibly due to friction with the fibers of the fiber structure.
Um eine stabilisierte Auflage der Verdichtereinheit auf der Streckwerkswalze zu ermöglichen, ist vorzugsweise vorgesehen, dass an der Auflagefläche und beabstandet von dem Verschleißrand eine Abstützerhöhung angeordnet ist.In order to enable a stabilized support of the compressor unit on the drafting device roller, it is preferably provided that a support elevation is arranged on the support surface and at a distance from the wear edge.
Die Abstützerhöhung unterliegt ebenfalls einem Verschleiß und läuft sich daher zu Beginn der Benutzung der Verdichtereinheit ein. Sowohl der Verschleißrand als auch die Abstützerhöhung ermöglichen somit bereits zu Beginn der Nutzung der Verdichtereinheit im Spinnbetrieb eine stabile Auflagerung der Verdichtereinheit auf der Streckwerkswalze. Im Lauf der Benutzung der Verdichtereinheit wird die Auflage durch zunehmenden Verschleiß immer stabiler und dichter, ohne dass die Verdichtereinheit eine unzulässige Position einnimmt.The raised support is also subject to wear and tear and therefore runs in at the beginning of the use of the compressor unit. Both the wear edge and the support elevation thus enable the compressor unit to be supported on the drafting roller in a stable manner at the beginning of the use of the compressor unit in spinning operation. In the course of using the compressor unit, the pad becomes more and more stable and dense due to increasing wear, without the compressor unit assuming an impermissible position.
In einer vorzugsweisen Ausführung hat die Abstützerhöhung eine anfängliche Abstützfläche zwischen 0,05 und 1 mm2. Hierdurch unterliegt die Abstützerhöhung einem schnellen Verschleiß und passt sich den Anforderungen für eine ordnungsgemäße Position der Verdichtereinheit schnell an.In a preferred embodiment, the support elevation has an initial support area between 0.05 and 1 mm 2 . As a result, the support increase is subject to rapid wear and tear and quickly adapts to the requirements for a correct position of the compressor unit.
Vergleichbar mit dem Verschleißrand ist es besonders vorteilhaft, wenn die Abstützerhöhung zur Auflagefläche hin, vorzugsweise allmählich, abfällt. Die Abstützerhöhung kann hierbei ebenfalls rampenförmig mit einer Spitze oder einem runden oder eckigen Plateau ausgeführt sein. Alternativ ist es unter anderem auch möglich, dass sie in Form eines Kugelsegments ausgeführt ist. Die Abstützfläche der Abstützerhöhung nimmt somit mit zunehmendem Verschleiß zu, wodurch auch der Verschleiß allmählich langsamer stattfindet.Comparable to the wear edge, it is particularly advantageous if the support elevation slopes down towards the support surface, preferably gradually. The support elevation can also be designed in the form of a ramp with a point or a round or angular plateau. Alternatively, it is also possible, among other things, for it to be designed in the form of a spherical segment. The support surface of the support elevation thus increases with increasing wear, so that wear also takes place gradually more slowly.
Vorzugsweise umfasst die Verdichtereinheit wenigstens eine Aufnahme für ein Belastungselement zum Erzeugen einer Auflagekraft an den Auflageflächen der Verdichtereinheit. Hierdurch kann eine definierte Auflagekraft und damit ein dichtes Aufliegen der Verdichtereinheit auf der Streckwerkswalze erzeugt werden.The compressor unit preferably comprises at least one receptacle for a loading element for generating a bearing force on the bearing surfaces of the compressor unit. As a result, a defined contact force and thus the compacting unit resting tightly on the drafting roller can be generated.
In einer bevorzugten Ausführung der Erfindung weist die Verdichtereinheit eine Verschleißanzeige für die Auflagefläche der Faserverbandführung auf. Damit ist es für den Bediener der Spinnmaschine einfach festzustellen, ob der Gesamtverschleiß der Verdichtereinheit ein zulässiges Maß überschreitet und kann damit die Verdichtereinheit rechtzeitig austauschen, ohne dass die Qualität des Spinnergebnisses leidet.In a preferred embodiment of the invention, the compressor unit has a wear indicator for the support surface of the fiber structure guide. This makes it easy for the operator of the spinning machine to determine whether the overall wear of the compressor unit exceeds a permissible level and can therefore replace the compressor unit in good time without the quality of the spinning result suffering.
Weitere Vorteile der Erfindung sind in den nachfolgenden Ausführungsbeispielen beschrieben. Es zeigt:
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Figur 1 - eine Seitenansicht auf eine Verdichtereinheit an einer Streckwerkswalze,
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Figur 2 - eine Ansicht von unten auf eine Verdichtereinheit für zwei Faserverbände,
- Figur 3a
- einen Schnitt durch eine Faserverbandführung,
- Figur 3b
- einen Schnitt durch eine alternative Faserverbandführung,
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Figur 4 - eine Seitenansicht auf eine alternative Faserverbandführung und
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Figur 5 - eine Ansicht von vorne auf eine Verdichtereinheit für zwei Faserverbände.
- Figure 1
- a side view of a compactor unit on a drafting roller,
- Figure 2
- a view from below of a compression unit for two fiber structures,
- Figure 3a
- a section through a fiber structure guide,
- Figure 3b
- a section through an alternative fiber structure guide,
- Figure 4
- a side view of an alternative fiber structure guide and
- Figure 5
- a view from the front of a compression unit for two fiber structures.
Bei der nachfolgenden Beschreibung der dargestellten alternativen Ausführungsbeispiele werden für Merkmale, die im Vergleich zu anderen Ausführungsbeispielen dieser Anmeldung in ihrer Ausgestaltung und/oder Wirkweise identisch und/oder zumindest vergleichbar sind, gleiche Bezugszeichen verwendet. Sofern diese nicht nochmals detailliert erläutert werden, entspricht deren Ausgestaltung und/oder Wirkweise der Ausgestaltung und Wirkweise der vorstehend bereits beschriebenen Merkmale.In the following description of the alternative exemplary embodiments shown, the same reference numerals are used for features that are identical and / or at least comparable in their design and / or mode of operation in comparison to other exemplary embodiments of this application. If these are not explained again in detail, their design and / or mode of action corresponds to the design and mode of action of the features already described above.
Die erste Faserverbandführung 3 und die zweite Faserverbandführung 4 sind mittels eines Halters 8 miteinander verbunden. Die beiden Faserverbandführungen 3 und 4 sind an dem Halter 8 angeordnet. Sie können sich relativ zu dem Halter 8 bewegen oder fest an diesem angeordnet sein. An dem Halter 8 ist eine Aufnahme 9 angeordnet, welche mit einem Belastungselement 10 zusammenwirkt, welches die Verdichtereinheit 1 relativ zum Druckarm 7 beweglich lagert und damit ein exaktes und festes Andrücken der Verdichtereinheit 1 auf die Streckwerkswalze 2 bewirkt.The first
In der ersten Faserverbandführung 3 ist ein Führungskanal 11 mit Führungsflächen 11a und 11b (siehe
Die beiden Faserverbandführungen 3 und 4 können zusammen mit dem Halter 8 und vorzugsweise auch der Aufnahme 9 aus Kunststoff hergestellt sein. Sie können einteilig mit dem Halter 8 ausgeführt sein oder mit diesem beispielsweise mittels einer Klebeverbindung verbunden sein. Es ist auch möglich, dass sie mit dem Halter beweglich verbunden sind, so dass sie sich an die Streckwerkswalze anpassen können. Die Aufnahme 9 dient zur Befestigung des Halters 8 an dem Belastungselement 10.The two fiber structure guides 3 and 4 can be made of plastic together with the
Der Kunststoff kann besonders gut gleitfähig ausgeführt sein. Insbesondere die Auflageflächen 15 und 16 der Faserverbandführung 3, 4 sind vorzugsweise aus einem Kunststoff hergestellt, der Gleitlagereigenschaften aufweist. Diese Kunststoffe, die üblicherweise für Gleitlager eingesetzt werden, haben eine besonders gute Verschleißfestigkeit und einen geringen Gleitreibungswiderstand in Verbindung mit Stahl, aus dem die Streckwerkswalze 2 hergestellt ist. Enthält der Kunststoff einen Festschmierstoff, so ist eine hohe Standzeit ermöglicht. Weist der Kunststoff eine Beständigkeit gegenüber einer Einsatztemperatur von über 200°C, insbesondere mindestens 230°C auf, so ist auch eine Verwendung unter extremen Bedingungen ermöglicht.The plastic can be designed to slide particularly well. In particular, the bearing surfaces 15 and 16 of the
Die seitliche Darstellung zeigt die abgerundete konische Form der Faserverbandführung 3 und 4, um sich an die Druckwalzen 5 anschmiegen zu können. Auch bei einem Kontakt mit den Druckwalzen 5 ist es vorteilhaft, wenn die Faserverbandführungen 3 und 4 aus Kunststoffmaterial hergestellt sind, weil es einen Verschleiß und Reibungsverluste mindert. Die Auflagefläche 15 bzw. 16 ist in der Verdichtereinheit 1 integriert und ist gewölbt, um sich an die Streckwerkswalze 2 anschmiegen zu können.The side view shows the rounded conical shape of the
In
Die Verdichtereinheit 1 weist eine Verschleißanzeige 20 für die Auflageflächen 15 und 16 der Faserverbandführungen 3 und 4 auf. Die Verschleißanzeige 20 ist als eine Fläche zwischen den beiden Faserverbandführungen 3 und 4 im Bereich des Halters 8 ausgeführt. Wenn die Auflageflächen 15 und 16 nach längerem Einsatz, bei dem sie auf der sich drehenden Streckwerkswalze 2 aufliegen, abgenutzt sind, ist die Verdichtereinheit 1 in radialer Richtung der Streckwerkswalze 2 verkürzt. Dadurch wird der radiale Abstand zwischen Auflageflächen 15 und 16 und der Verschleißanzeige 20 verkürzt oder sogar ganz aufgebraucht. Im Extremfall wird sogar Material von der Verschleißanzeige 20 abgetragen. Dies ist das Zeichen für einen Bediener, dass die Verdichtereinheit 1 ausgetauscht werden muss, da die Führung des Faserverbandes 6 nicht mehr ausreichend gewährleistet werden kann.The
An den Auflageflächen 15 und 16 sind entlang der Führungskanäle 11 und den Führungsflächen 11a und 11b und der Verdichtungskanäle 13 mit den Führungsflächen 13a und 13b Verschleißränder 21 angeordnet. Die Verschleißränder 21 überragen die Auflageflächen 15 und 16, wie aus den folgenden Figuren ersichtlich ist. Im Neuzustand der Verdichtereinheit 1 kontaktieren die Verschleißränder 21 die Streckwerkswalze 2. Nachdem sie die Auflageflächen 15 und 16 überragen, werden sie durch die Reibung mit der Streckwerkswalze 2 als erstes abgetragen. Hierdurch wird sehr schnell eine durchgehende Kontaktfläche mit der Streckwerkswalze 2 geschaffen, sodass Fasern des Faserverbandes 6 nicht mehr zwischen der Verdichtereinheit 1 und der Streckwerkswalze 2 eingeklemmt werden können oder durch einen Spalt aus dem Führungskanal 11 oder dem Verdichtungskanal 13 austreten können.On the bearing surfaces 15 and 16, along the
Weiterhin ist in der Darstellung der
In
An den Rändern der Führungsflächen 11a und 11b ist eine Erhöhung gegenüber der Auflagefläche 16 vorgesehen. Diese Erhöhung stellt den Verschleißrand 21 dar. Der Verschleißrand 21 weist eine Höhe H auf, welche vorzugsweise maximal 0,2 mm beträgt. Eine Breite B beträgt vorzugsweise maximal 2 mm. In Richtung auf die Auflagefläche 16 nimmt die Höhe H allmählich ab. Der Winkel α der hier als Rampe dargestellten Abschrägung der Auflagefläche 16 kann beispielsweise in einem Bereich von 1° bis 15° liegen. Bei einem zunehmenden Verschleiß des Verschleißrandes 21 wird die Auflagefläche auf dem Verschleißrand 21 immer größer, wodurch auch die Geschwindigkeit des Verschleißes abnimmt. Es wird damit bewirkt, dass bei einer neuen Verdichtereinheit 1 der Verschleiß an den Verschleißrändern 21 schnell und stark sein wird, wodurch eine schnelle Anpassung und damit Abdichtung der Verdichtereinheit 1 an die Streckwerkswalze 2 erfolgt.At the edges of the guide surfaces 11a and 11b, there is an increase in relation to the
Analog kann die Gestaltung der
In
In
Die vorliegende Erfindung ist nicht auf die dargestellten und beschriebenen Ausführungsbeispiele beschränkt. Abwandlungen im Rahmen der Patentansprüche sind möglich. So können beispielsweise sowohl Führungskanal 11 als auch Verdichtungskanal 13 mit lediglich einer Führungsfläche 11a oder 11b bzw. 13a oder 13b ausgebildet sein. Ausdrücklich wird darauf hingewiesen, dass eine Kombination der Merkmale, auch wenn diese in unterschiedlichen Ausführungsbeispielen dargestellt und beschrieben sind, im Rahmen der geltenden Patentansprüche umfasst sind. Die Vorrichtung ist gemäß der vorangegangenen Beschreibung ausgebildet, wobei die genannten Merkmale einzeln oder in beliebiger Kombination vorhanden sein können.The present invention is not restricted to the illustrated and described exemplary embodiments. Modifications within the scope of the claims are possible. For example, both guide
- 11
- VerdichtereinheitCompressor unit
- 22
- StreckwerkswalzeDrafting roller
- 33
- erste Faserverbandführungfirst fiber structure guide
- 44th
- zweite Faserverbandführungsecond fiber structure guide
- 55
- DruckwalzePressure roller
- 66
- FaserverbandFiber bandage
- 77th
- DruckarmLow pressure
- 88th
- Halterholder
- 99
- Aufnahmeadmission
- 1010
- BelastungselementLoading element
- 1111
- FührungskanalGuide channel
- 11a, 11b11a, 11b
- FührungsflächeGuide surface
- 1212
- Stiftpen
- 1313
- VerdichtungskanalCompression channel
- 13a, 13b13a, 13b
- FührungsflächeGuide surface
- 1515th
- AuflageflächeSupport surface
- 1616
- AuflageflächeSupport surface
- 2020th
- VerschleißanzeigeWear indicator
- 2121st
- VerschleißrandWear edge
- 2222nd
- AbstützerhöhungSupport increase
- RR.
- Radiusradius
- rr
- Radius der WölbungRadius of curvature
- BB.
- Breitewidth
- HH
- Höheheight
- αα
- RampenwinkelRamp angle
Claims (15)
wobei die Verdichtereinheit (1) zumindest eine Faserverbandführung (3, 4) aufweist,
und die Faserverbandführung (3, 4) eine Führungsfläche (11a, 11b; 13a, 13b) für den Faserverband (6) aufweist, in deren Längsrichtung der Faserverband (6) verlaufen kann,
und eine an der Führungsfläche (11a, 11b; 13a, 13b) angeordnete Auflagefläche (15, 16) für die Auflage der Verdichtereinheit (1) auf einer Streckwerkswalze (2) vorgesehen ist,
wobei die Auflagefläche (15, 16) der Faserverbandführung (3, 4) aus einem Kunststoff hergestellt ist,
dadurch gekennzeichnet, dass
die Faserverbandführung (3, 4) an deren Auflagefläche (15, 16) entlang der Führungsfläche (11a, 11b; 13a, 13b) einen Verschleißrand (21) aufweist.Compaction unit for a drafting system of a textile machine, for compressing a ready-drawn fiber structure (6),
wherein the compression unit (1) has at least one fiber structure guide (3, 4),
and the fiber structure guide (3, 4) has a guide surface (11a, 11b; 13a, 13b) for the fiber structure (6), in the longitudinal direction of which the fiber structure (6) can run,
and a support surface (15, 16) arranged on the guide surface (11a, 11b; 13a, 13b) is provided for the support of the compactor unit (1) on a drafting system roller (2),
wherein the support surface (15, 16) of the fiber structure guide (3, 4) is made of a plastic,
characterized in that
the fiber structure guide (3, 4) has a wear edge (21) on its support surface (15, 16) along the guide surface (11a, 11b; 13a, 13b).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019113676.8A DE102019113676A1 (en) | 2019-05-22 | 2019-05-22 | Compaction unit for a drafting system of a textile machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3741888A1 true EP3741888A1 (en) | 2020-11-25 |
EP3741888B1 EP3741888B1 (en) | 2022-12-14 |
Family
ID=70740481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20175149.2A Active EP3741888B1 (en) | 2019-05-22 | 2020-05-18 | Condensing unit for a drafting device of a textile machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3741888B1 (en) |
CN (1) | CN111979618B (en) |
DE (1) | DE102019113676A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10356913A1 (en) * | 2003-12-02 | 2005-07-07 | Wilhelm Stahlecker Gmbh | Drafting system for spinning with mechanical sliver compaction includes gap smaller than fiber thickness between sliver guide and delivery roller |
EP2314743A1 (en) | 2008-04-24 | 2011-04-27 | Spindelfabrik Suessen GmbH | Pressure rolls unit for a drafting device in a textile machine |
DE102012025176A1 (en) | 2012-12-24 | 2014-06-26 | Rotorcraft Ag | Compressor for ring spinning machines, has magnet for positioning of compressor to delivery cylinder of drafting unit, and united elastic securing element is formed in component made of injectable synthetic material |
DE102015002206A1 (en) * | 2015-02-20 | 2016-08-25 | Rotorcraft Ag | Arrangement for seating a compressor on a lower cylinder of a drafting system |
EP3073000A1 (en) | 2015-03-27 | 2016-09-28 | Maschinenfabrik Rieter Ag | Compressor unit |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4419703B2 (en) * | 2004-06-22 | 2010-02-24 | 株式会社豊田自動織機 | Fiber bundle concentrator in spinning machine |
DE102007006282A1 (en) * | 2007-02-01 | 2008-08-07 | Wilhelm Stahlecker Gmbh | Drawframe with compression zone |
DE102008064531A1 (en) * | 2008-12-19 | 2010-07-01 | Wilhelm Stahlecker Gmbh | Compressor unit and traversing device for a drafting system |
-
2019
- 2019-05-22 DE DE102019113676.8A patent/DE102019113676A1/en not_active Withdrawn
-
2020
- 2020-05-18 EP EP20175149.2A patent/EP3741888B1/en active Active
- 2020-05-20 CN CN202010430845.XA patent/CN111979618B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10356913A1 (en) * | 2003-12-02 | 2005-07-07 | Wilhelm Stahlecker Gmbh | Drafting system for spinning with mechanical sliver compaction includes gap smaller than fiber thickness between sliver guide and delivery roller |
EP2314743A1 (en) | 2008-04-24 | 2011-04-27 | Spindelfabrik Suessen GmbH | Pressure rolls unit for a drafting device in a textile machine |
DE102012025176A1 (en) | 2012-12-24 | 2014-06-26 | Rotorcraft Ag | Compressor for ring spinning machines, has magnet for positioning of compressor to delivery cylinder of drafting unit, and united elastic securing element is formed in component made of injectable synthetic material |
DE102015002206A1 (en) * | 2015-02-20 | 2016-08-25 | Rotorcraft Ag | Arrangement for seating a compressor on a lower cylinder of a drafting system |
EP3073000A1 (en) | 2015-03-27 | 2016-09-28 | Maschinenfabrik Rieter Ag | Compressor unit |
Also Published As
Publication number | Publication date |
---|---|
DE102019113676A1 (en) | 2020-11-26 |
CN111979618A (en) | 2020-11-24 |
EP3741888B1 (en) | 2022-12-14 |
CN111979618B (en) | 2023-04-11 |
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