EP3543386B1 - Tape forming unit for a card - Google Patents
Tape forming unit for a card Download PDFInfo
- Publication number
- EP3543386B1 EP3543386B1 EP19160976.7A EP19160976A EP3543386B1 EP 3543386 B1 EP3543386 B1 EP 3543386B1 EP 19160976 A EP19160976 A EP 19160976A EP 3543386 B1 EP3543386 B1 EP 3543386B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fleece
- sliver
- forming unit
- guide
- transverse
- 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.)
- Active
Links
- 239000000835 fiber Substances 0.000 claims description 59
- 238000000576 coating method Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 2
- 244000144992 flock Species 0.000 description 5
- 239000002657 fibrous material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
- D01G15/02—Carding machines
- D01G15/12—Details
- D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
-
- 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 sliver forming unit for a card.
- the card produces a card sliver from the fiber material fed in, which is then processed into a yarn.
- a feed chute is usually assigned to a card, which is supplied with fibers from a blow room by a conveyor system.
- the fibers are cleaned and parallelized by the card. To do this, the fibers are fed over a card drum.
- the fibers are removed from the card drum by a doffer in the form of a fiber fleece and fed to a sliver forming unit.
- the pick-up essentially consists of a pick-up roller, a transfer roller and a pair of output rollers.
- the fiber fleece extends over the entire working width of the card. In the sliver-forming unit, the fiber fleece is brought together to form a card sliver.
- the fiber fleece After leaving the pair of output rollers, the fiber fleece encounters a transverse belt which causes the fiber fleece to be conveyed in the axial direction of the pair of output rollers. As a result, the fibers of the fiber fleece are conveyed to the end of the transverse belt and thus brought together.
- a cross sliver is used for cards with a small working width. For cards with a larger working width, two cross slivers running in opposite directions are generally used. After the cross sliver, the merged fiber fleece arrives via various guides and funnels to a pair of pressure rollers which cause the final shaping of the card sliver.
- cross belts are used to merge, which pass the merged fiber fleece on to a discharge unit.
- the merged fiber fleece is received in a funnel-shaped guide element after the cross belts moving in opposite directions release the merged fiber fleece.
- the disadvantage here is that the fleece is not guided by the transverse belts while it is being brought together.
- the fiber fleece can move freely in a direction transverse to the direction of movement of the transverse belts, thereby ensuring a perfect transfer of the material brought together by the transverse belts Fiber fleece to the funnel-shaped guide element is not guaranteed at high production speeds.
- the object of the present invention is therefore to create a sliver-forming unit of a card which ensures that the fiber fleece is guided during the merging at the point where the two transverse slivers bring the fibers together.
- a sliver forming unit for a card is proposed with two transverse belts for merging the fleece, with at least one guide funnel and a pair of pressure rollers, the transverse belts moving in opposite directions and being arranged at a distance from one another at their deflection points for the passage of the merged fleece belt.
- fleece belt guides are arranged to guide the fleece belt to the guide funnel, the fleece belt guide providing a guide for the fleece belt to the guide funnel perpendicular to the direction of movement of the transverse belts and to the direction of movement of the fiber fleece.
- the fleece belt guides advantageously have a shape that is concentrically adapted to a deflection radius of the transverse belts in the deflection point.
- a distance between the transverse belt and the fleece belt guide increases steadily. This prevents fibers or parts of the fleece tape from damming up or jamming.
- the cross belts are guided over deflection rollers.
- the deflection radius of a cross belt corresponds to the sum of the radius of the deflection roller and a thickness of the cross belt.
- the fact that the shape of the fleece belt guides essentially corresponds to the deflection radius of the transverse belt means that the opening between the transverse belts can be closed as completely as possible.
- opposing surfaces of the nonwoven tape guides each have a slope on a side facing away from the guide funnel, the inclination increasing the distance between the surfaces of the nonwoven tape guides as the distance from the guide funnel increases.
- the side of the fleece belt guide opposite the guide funnel corresponds to the inlet side of the fleece belt. Since the fiber fleece cannot be brought together in a line by the transverse belts, it is advantageous if the inlet side of the fleece belt guide is designed in such a way that the interaction of the opposing surfaces of the fleece belt guide results in a conical inlet in the direction of the guide funnel.
- the conical part and thus the inclination of the surfaces preferably lead to the narrowest point between the transverse belts.
- the inclination is dependent on the size of the output rollers of the card and the distance between the sliver forming unit and the output rollers and is preferably 10 to 45 degrees, particularly preferably 20 to 30 degrees, with the dimensions customary today in cards.
- the guidance of the fleece tape is continued with a constant distance between the opposing surfaces of the fleece tape guide.
- the opposing surfaces of the fleece tape guides each have a guide groove.
- the guide groove results in a bundled guidance of the fleece tape to the guide funnel.
- the guide grooves are preferably designed in the form of grooves with a depth of 1 mm to 5 mm and a radius of 8 mm to 20 mm, particularly preferably the depth 3 mm and the radius 12 mm to 14 mm.
- the guide grooves extend over the entire length of the opposing surfaces of the fleece tape guide and are also continued in the inclined part of the surface.
- the inclined surfaces on both sides of the guide groove are designed to be sloping in the direction of the respective transverse belt.
- the surfaces formed with an incline are additionally arranged obliquely away from the fleece belt against the respective transverse belt. This results in an inclined plane which is inclined towards the fleece belt inlet on the one hand and towards the direction of movement of the transverse belts on the other hand. This prevents the combined fibers of the fiber fleece from accumulating during the transition from the output rollers of the card to the intermediate space formed by the transverse belts and the fleece belt guide.
- the fiber fleece is evenly brought together to form the fleece band in a way that is gentle on the fibers and the passage is continuously narrowed.
- the transverse belts are provided with two spaced-apart limiting profiles for guiding the fleece belt in the direction of movement of the transverse belts.
- On an outer surface of the transverse belt facing the fiber fleece or fleece belt at least two spaced apart boundary profiles are provided which extend over the entire length of the transverse belt. Because the delimitation profiles are arranged on the transverse belt and consequently move with the transverse belt, an occurrence of increased fiber friction and the resulting fiber damage is avoided in comparison to stationary guides.
- the boundary profiles are advantageously arranged symmetrically on the transverse belt at a distance of 30 mm to 50 mm. The dimensions result from the thickness and the discharge speed of the fiber fleece produced and the thickness of the card sliver to be achieved. It has shown, that a distance between the boundary profiles of 40 mm is preferable for today's high-performance cards.
- the opposing surfaces of the fleece tape guides are preferably arranged at the same distance as the boundary profiles. As a result, there is no further cross-sectional constriction for the fleece belt in the direction transverse to the direction of movement of the transverse belts at the point of merging.
- a distance between the fleece belt guide and the transverse belt or the surface of the boundary profiles is advantageously 1 mm to 4 mm, particularly preferably 3 mm. This takes into account the operational tolerances. The distance is also chosen so that no air currents interfering with the merging process occur.
- the fleece tape guides are advantageously made from a metallic material and provided with a coating or, alternatively, are made from a plastic.
- the coating to be used or a plastic used have the necessary sliding properties for the friction-minimized conveyance of fibers.
- different materials can also be used for the fleece belt guide, since, for example, PES fibers do not have the same sliding properties as cotton or viscose fibers.
- coatings with hard chrome or plastics such as POM are suitable.
- a card with a sliver-forming unit is also proposed, two fleece sliver guides as described above being provided in the sliver-forming unit.
- Figure 1 shows a card 1 equipped with a feed chute 2, a feed chute 5 and a feed channel 3. After they have passed through the various process stages of a blow room, fiber flocks 4 arrive in the feed chute 2.
- the fiber flocks 4 are fed through the feed chute 5, comprising a feed roller 6 and an opening roller 7 and an air supply 8, passed on to the feed channel 3.
- an air supply 8 is provided to support the transfer of flakes to the feed channel 3 and to ensure lap compaction upstream of a feed device 10 of the card 1.
- the air supply 8 blows air tangentially along the opening roller 7 into the feed channel 3 and thereby compresses the fiber flocks into a wad with a high wad weight necessary for further processing in the card 1.
- a feed device 10 following the feed channel 3 feeds the fiber flocks, now in the form of a homogeneous wadding 11, to the licker-in module 12 of the card 1.
- the fiber flocks released by the feed device 10 from the lap mat 11 are opened further by the lickerins contained in the lickerin module 12 and at the same time freed from some of the impurities contained therein.
- the last lickerin of the lickerin module 12 finally transfers the fibers to the card drum 13, which completely dissolves and parallelizes the fibers.
- the card drum 13 works together with the cover assembly 14 for this purpose.
- the fibers After the fibers have in some cases made several revolutions on the card drum 13, they are removed from the card drum 13 by a removal unit 15 in the form of a fiber fleece 17 and fed to a sliver formation unit 16 with a pair of output rollers 9.
- the sliver forming unit 16 transforms the fiber fleece 17 formed by the card drum 13 into a card sliver 19.
- the card sliver 19 is then placed in a can for further transport (not shown).
- FIG. 16 shows a schematic side view of a band forming unit 16 and FIG Figure 3 a schematic plan view in direction X of the band forming unit 16 according to FIG Figure 2 .
- the fiber fleece 17 arriving in the band forming unit 16 in the direction of movement 23 is picked up by a pair of output rollers 9 and transverse bands 20 arranged in pairs are passed on.
- the transverse belts 20 are arranged opposite one another in a plane.
- the respective ends of the transverse belts 20 are guided over deflection rollers 21 and driven in opposite directions, so that the transverse belts 20 move towards one another in their direction of movement 30 along the pair of output rollers 9.
- the transverse belts 20 have a spacing C at a narrowest point 34.
- the fiber fleece 17 is combined in the direction of the longitudinal axis of the pair of output rollers 9 to form a fleece belt 18.
- the fiber fleece 17 is guided transversely to its direction of movement 23 in the pair of output rollers 9 between the two transverse belts 20.
- the fiber fleece 17, which extends over the length of the pair of output rollers 9 is brought by the transverse belts 20 to the narrowest point 34 between the transverse belts 20 and brought together to form the fleece belt 18.
- the transverse belts 20 are provided with limiting profiles 22.
- the boundary profiles 22 are arranged in pairs on the surface of the transverse belt 20 at a distance A. Depending on the fiber material to be processed, these boundary profiles 22 can also be dispensed with.
- fleece belt guides 27 and 28 are arranged.
- the non-woven tape 18 is guided between an upper surface 31 of the upper non-woven tape guide 27 and a lower surface 32 of the lower non-woven tape guide 28 through the narrowest point 34 between the transverse belts 20.
- a distance B between the surfaces 31 and 32 of the fleece belt guides 27 and 28 corresponds to the distance A between the boundary profiles 22 of the transverse belts 20.
- the fleece belt guides 27 and 28 are formed on the side facing a transverse belt 20 on a deflection radius R of the transverse belt 20 and in a certain distance F (see Figure 4 ) to the transverse belt 20 arranged.
- the deflection radius R is determined by the outermost surface of the boundary profiles 22 at the deflection point of the transverse belt 20 around the deflection roller 21.
- the fleece belt 18 After the fleece belt 18 has passed through the narrow point between the transverse belts 18 and the fleece belt guides 27 and 28, the fleece belt is taken over by a guide funnel 24.
- the guide funnel 24 serves to reduce the size of the fleece strip 18 and to pass it on to the end funnel 25.
- the fleece strip 18 passes from the end funnel 25 into a pair of pressure rollers 26.
- the pair of pressure rollers 26 forms the fleece strip 18 into a card sliver 19. Another function of the pair of pressure rollers 26 is to pull the fleece tape 18 through the funnels 24 and 25.
- FIG 4 shows a schematic view of a fleece tape guide 28 according to the invention in elevation, side elevation and floor plan.
- the one in the Figures 2 and 3 The fleece belt guide 27 shown is correspondingly designed in a mirror-inverted manner.
- the shape of the fleece belt guide 28 is matched to that of the transverse belt 20.
- the contour of the fleece belt guide 28 is arranged concentrically to at a distance F from the transverse belt 20.
- the contour of the fleece belt guide 28 is formed onto the transverse belt in such a way that the distance F between the fleece belt guide 28 and the transverse belt 20 increases steadily.
- the fleece tape guide 27 has a surface 32 which is used to guide the fleece tape.
- the surface 32 or at least a part thereof is inclined against the shown direction of movement 23 of the nonwoven strip at an angle â to the horizontal.
- a guide groove 29 with an arcuate cross-section is provided in the surface 32 over the entire length of the fleece tape guide 32.
- the guide groove 29 has a depth D and a radius E.
- the parts of the surface 33 which are located on both sides of the guide groove 29 in the area of the output roller pair 9 (see Figure 3 ) are located as inclined surfaces 33 executed.
- the inclined surfaces 33 are each arranged obliquely away from the nonwoven belt against the adjacent transverse belt 20.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Nonwoven Fabrics (AREA)
Description
Die vorliegende Erfindung betrifft eine Bandbildungseinheit fĂźr eine Karde.The present invention relates to a sliver forming unit for a card.
Die Karde produziert aus eingespeistem Fasergut ein Kardenband, welches in der Folge zu einem Garn weiter verarbeitet wird. Dabei ist einer Karde in der Regel ein FĂźllschacht zugeordnet welcher durch ein FĂśrdersystem mit Fasern aus einer Putzerei versorgt wird. Die Fasern werden durch die Karde gereinigt und parallelisiert. Dazu werden die Fasern Ăźber eine Kardentrommel gefĂźhrt. Von der Kardentrommel werden die Fasern durch einen Abnehmer in Form eines Faservlieses abgenommen und einer Bandbildungseinheit zugefĂźhrt. Der Abnehmer besteht dabei im Wesentlichen aus einer Abnahmewalze, einer Ăbergabewalze und einem Ausgangswalzenpaar. Das Faservlies erstreckt sich Ăźber die gesamte Arbeitsbreite der Karde. In der Bandbildungseinheit wird das Faservlies zu einem Kardenband zusammengefĂźhrt. Dabei trifft das Faservlies nach Verlassen des Ausgangswalzenpaares auf ein Querband, welches eine FĂśrderung des Faservlieses in Achsrichtung des Ausgangswalzenpaares bewirkt. Dadurch werden die Fasern des Faservlieses zum Ende des Querbandes gefĂśrdert und so zusammengefĂźhrt. Bei Karden mit kleiner Arbeitsbreite wird dazu ein Querband eingesetzt. Bei Karden mit grĂśsserer Arbeitsbreite werden in der Regel zwei gegenläufige Querbänder verwendet. Nach dem Querband gelangt das zusammengefĂźhrte Faservlies Ăźber verschiedene FĂźhrungen und Trichter zu einem Druckwalzenpaar welches die endgĂźltige Ausformung des Kardenbandes bewirkt.The card produces a card sliver from the fiber material fed in, which is then processed into a yarn. A feed chute is usually assigned to a card, which is supplied with fibers from a blow room by a conveyor system. The fibers are cleaned and parallelized by the card. To do this, the fibers are fed over a card drum. The fibers are removed from the card drum by a doffer in the form of a fiber fleece and fed to a sliver forming unit. The pick-up essentially consists of a pick-up roller, a transfer roller and a pair of output rollers. The fiber fleece extends over the entire working width of the card. In the sliver-forming unit, the fiber fleece is brought together to form a card sliver. After leaving the pair of output rollers, the fiber fleece encounters a transverse belt which causes the fiber fleece to be conveyed in the axial direction of the pair of output rollers. As a result, the fibers of the fiber fleece are conveyed to the end of the transverse belt and thus brought together. A cross sliver is used for cards with a small working width. For cards with a larger working width, two cross slivers running in opposite directions are generally used. After the cross sliver, the merged fiber fleece arrives via various guides and funnels to a pair of pressure rollers which cause the final shaping of the card sliver.
Aus dem Stand der Technik ist beispielsweise eine Bandbildungseinheit einer Karde nach der
Aufgabe der vorliegenden Erfindung ist es somit, eine Bandbildungseinheit einer Karde zu schaffen, welche eine Fßhrung des Faservlieses gewährleistet während der Zusammenfßhrung an der Stelle wo die beiden Querbänder die Fasern zusammenbringen.The object of the present invention is therefore to create a sliver-forming unit of a card which ensures that the fiber fleece is guided during the merging at the point where the two transverse slivers bring the fibers together.
Die Aufgabe wird gelÜst durch eine Bandbildungseinheit mit den Merkmalen des unabhängigen Patentanspruchs.The object is achieved by a band-forming unit with the features of the independent patent claim.
Vorgeschlagen wird eine Bandbildungseinheit fßr eine Karde mit zwei Querbändern zur Vlieszusammenfßhrung, mit zumindest einem Fßhrungstrichter und einem Druckwalzenpaar, wobei die Querbänder eine gegenläufige Bewegungsrichtung aufweisen und mit einem Abstand an ihren Umlenkstellen zum Durchlass des zusammengefßhrten Vliesbandes gegeneinander angeordnet sind. Zwischen den Querbändern sind Vliesbandfßhrer zur Fßhrung des Vliesbandes zum Fßhrungstrichter angeordnet, wobei durch die Vliesbandfßhrer eine Fßhrung des Vliesbandes zum Fßhrungstrichter lotrecht zur Bewegungsrichtung der Querbänder und zur Bewegungsrichtung des Faservlieses vorgesehen ist.A sliver forming unit for a card is proposed with two transverse belts for merging the fleece, with at least one guide funnel and a pair of pressure rollers, the transverse belts moving in opposite directions and being arranged at a distance from one another at their deflection points for the passage of the merged fleece belt. Between the transverse belts, fleece belt guides are arranged to guide the fleece belt to the guide funnel, the fleece belt guide providing a guide for the fleece belt to the guide funnel perpendicular to the direction of movement of the transverse belts and to the direction of movement of the fiber fleece.
Aufgrund der hohen Bandgeschwindigkeiten bei hoher Produktion von bis zu 8 m/sec oder mehr fĂźhrt eine ZusammenfĂźhrung des Faservlieses am Ende der Querbänder an welchem die Querbänder die Fasern des Faservlieses zu einem Vliesband zusammenfĂźhren dazu, dass sich Fasern aufstauen oder abspleissen und aus der eigentlichen Bewegungsrichtung des Querbandes ausweichen. Dieser Vorgang wird durch die Anordnung der VliesbandfĂźhrer eingedämmt. Die Fasern werden durch die VliesbandfĂźhrer quer zur Bewegungsrichtung des Vliesbandes gefĂźhrt. Die VliesbandfĂźhrer fĂźllen die LĂźcken, welche zwischen den Querbändern nach unten und oben offen sind. Die Fasern welche durch die Querbänder gegeneinander gefĂśrdert und durch die Ăffnung zwischen den Querbändern zum FĂźhrungstrichter gebracht werden, werden auch bei hohen Produktionsgeschwindigkeiten durch die VliesbandfĂźhrer ohne vertikale AusweichmĂśglichkeit zum FĂźhrungstrichter gefĂźhrt.Due to the high belt speeds with high production of up to 8 m / sec or more, merging the fiber fleece at the end of the transverse belts at which the transverse belts merge the fibers of the fiber fleece into a fleece belt leads to fibers building up or splicing off and out of the actual direction of movement evade the transverse belt. This process is curbed by the arrangement of the fleece belt guide. The fibers are guided by the fleece belt guide transversely to the direction of movement of the fleece belt. The fleece belt guides fill the gaps that are open at the top and bottom between the transverse belts. The fibers, which are conveyed against each other by the transverse belts and brought to the guide funnel through the opening between the transverse belts, are guided to the guide funnel even at high production speeds by the fleece belt guide without vertical evasion.
Vorteilhafterweise weisen die VliesbandfĂźhrer vom Ausgangswalzenpaar bis zur engsten Stelle zwischen den Querbändern eine konzentrisch an einen Umlenkradius der Querbänder in der Umlenkstelle angepasste Formgebung auf. Im weiteren Verlauf von der engsten Stelle zwischen den Querbändern gegen den FĂźhrungstrichter nimmt ein Abstand zwischen dem Querband und dem VliesbandfĂźhrer stetig zu. Dadurch wird ein Aufstauen oder Einklemmen von Fasern oder Teilen des Vliesbandes vermieden. An der Umlenkstelle werden die Querbänder Ăźber Umlenkrollen gefĂźhrt. Der Umlenkradius eines Querbandes entspricht der Summe aus dem Radius der Umlenkrolle und einer Dicke des Querbandes. Dadurch, dass die VliesbandfĂźhrer in ihrer Formgebung im Wesentlichen dem Umlenkradius des Querbandes entsprechen, ist eine mĂśglichst lĂźckenlose Schliessung der Ăffnung zwischen den Querbändern mĂśglich.From the pair of output rollers to the narrowest point between the transverse belts, the fleece belt guides advantageously have a shape that is concentrically adapted to a deflection radius of the transverse belts in the deflection point. In the further course from the narrowest point between the transverse belts towards the guide funnel, a distance between the transverse belt and the fleece belt guide increases steadily. This prevents fibers or parts of the fleece tape from damming up or jamming. At the deflection point, the cross belts are guided over deflection rollers. The deflection radius of a cross belt corresponds to the sum of the radius of the deflection roller and a thickness of the cross belt. The fact that the shape of the fleece belt guides essentially corresponds to the deflection radius of the transverse belt means that the opening between the transverse belts can be closed as completely as possible.
Weiter ist es von Vorteil, wenn sich gegenßber liegende Oberflächen der Vliesbandfßhrer auf einer dem Fßhrungstrichter abgewandten Seite jeweils eine Neigung aufweisen, wobei die Neigung mit zunehmendem Abstand vom Fßhrungstrichter eine VergrÜsserung des Abstandes zwischen den Oberflächen der Vliesbandfßhrer bewirkt. Die dem Fßhrungstrichter entgegengesetzte Seite der Vliesbandfßhrer entspricht der Einlaufseite der Vliesbandes. Da das Faservlies durch die Querbänder nicht in einer Linie zusammengefßhrt werden kann, ist es von Vorteil, wenn die Einlaufseite der Vliesbandfßhrer derart gestaltet ist, dass sich im Zusammenspiel der sich gegenßberliegenden Oberflächen der Vliesbandfßhrer ein konischer Einlauf in Richtung des Fßhrungstrichters ergibt. Bevorzugterweise fßhren der konische Teil und damit die Neigung der Oberflächen bis zur engsten Stelle zwischen den Querbändern. Die Neigung ist abhängig von der GrÜsse der Ausgangswalzen der Karde und vom Abstand der Bandbildungseinheit von den Ausgangswalzen und beträgt bei den heute ßblichen Abmessungen in Karden bevorzugterweise 10 bis 45 Winkelgrade, besonders bevorzugt 20 bis 30 Winkelgrade. Anschliessend an den geneigten Teil der Oberflächen wird die Fßhrung des Vliesbandes mit einem gleichbleibenden Abstand der sich gegenßberliegenden Oberflächen der Vliesbandfßhrer fortgesetzt.It is also advantageous if opposing surfaces of the nonwoven tape guides each have a slope on a side facing away from the guide funnel, the inclination increasing the distance between the surfaces of the nonwoven tape guides as the distance from the guide funnel increases. The side of the fleece belt guide opposite the guide funnel corresponds to the inlet side of the fleece belt. Since the fiber fleece cannot be brought together in a line by the transverse belts, it is advantageous if the inlet side of the fleece belt guide is designed in such a way that the interaction of the opposing surfaces of the fleece belt guide results in a conical inlet in the direction of the guide funnel. The conical part and thus the inclination of the surfaces preferably lead to the narrowest point between the transverse belts. The inclination is dependent on the size of the output rollers of the card and the distance between the sliver forming unit and the output rollers and is preferably 10 to 45 degrees, particularly preferably 20 to 30 degrees, with the dimensions customary today in cards. Following the inclined part of the surfaces, the guidance of the fleece tape is continued with a constant distance between the opposing surfaces of the fleece tape guide.
Vorteilhafterweise weisen die sich gegenßber liegende Oberflächen der Vliesbandfßhrer jeweils eine Fßhrungsrille auf. Durch die Fßhrungsrille ergibt sich eine gebßndelte Fßhrung des Vliesbandes zum Fßhrungstrichter. Bevorzugterweise sind die Fßhrungsrillen in Form von Rinnen mit einer Tiefe von 1 mm bis 5 mm und einen Radius von 8 mm bis 20 mm ausgefßhrt, besonders bevorzugt ist die Tiefe 3 mm und der Radius 12 mm bis 14 mm. Die Fßhrungsrillen erstrecken sich ßber die gesamte Länge der sich entgegen gerichteten Oberflächen der Vliesbandfßhrer und werden auch im geneigten Teil der Oberfläche fortgefßhrt.Advantageously, the opposing surfaces of the fleece tape guides each have a guide groove. The guide groove results in a bundled guidance of the fleece tape to the guide funnel. The guide grooves are preferably designed in the form of grooves with a depth of 1 mm to 5 mm and a radius of 8 mm to 20 mm, particularly preferably the
Weiterhin ist es vorteilhaft, wenn die geneigten Oberflächen beidseits der FĂźhrungsrille in Richtung des jeweiligen Querbandes abfallend ausgebildet sind. Die mit einer Neigung ausgebildeten Oberflächen sind dabei zusätzlich gegen das jeweilige Querband schräg vom Vliesband weg angeordnet. Es ergibt sich somit eine schiefe Ebene welche gegen den Vliesbandeinlauf einerseits und gegen die Bewegungsrichtung der Querbänder andrerseits eine Neigung aufweist. Dadurch wird eine Stauung der zusammengefĂźhrten Fasern des Faservlieses beim Ăbergang von den Ausgangswalzen der Karde in den durch die Querbänder und die VliesbandfĂźhrer gebildeten Zwischenraum verhindert. Es erfolgt eine faserschonende und gleichmässige ZusammenfĂźhrung des Faservlieses zum Vliesband durch eine kontinuierliche Verengung des Durchgangs.Furthermore, it is advantageous if the inclined surfaces on both sides of the guide groove are designed to be sloping in the direction of the respective transverse belt. The surfaces formed with an incline are additionally arranged obliquely away from the fleece belt against the respective transverse belt. This results in an inclined plane which is inclined towards the fleece belt inlet on the one hand and towards the direction of movement of the transverse belts on the other hand. This prevents the combined fibers of the fiber fleece from accumulating during the transition from the output rollers of the card to the intermediate space formed by the transverse belts and the fleece belt guide. The fiber fleece is evenly brought together to form the fleece band in a way that is gentle on the fibers and the passage is continuously narrowed.
Weiter wird vorgeschlagen, dass die Querbänder mit zwei in einem Abstand angeordneten Begrenzungsprofilen zur Fßhrung des Vliesbandes in der Bewegungsrichtung der Querbänder versehen sind. Auf einer äusseren dem Faservlies respektive Vliesband zugewandten Oberfläche des Querbandes sind zumindest zwei voneinander beabstandete Begrenzungsprofile vorgesehen, welche sich ßber die gesamte Länge des Querbandes erstrecken. Dadurch dass die Begrenzungsprofile auf dem Querband angeordnet sind und sich folglich mit dem Querband bewegen, wird, im Vergleich zu stationären Fßhrungen, ein Auftreten von erhÜhter Faserreibung und eine dadurch hervorgerufene Faserschädigung vermieden. Vorteilhafterweise sind die Begrenzungsprofile symmetrisch auf dem Querband in einem Abstand von 30 mm bis 50 mm angeordnet. Die Abmessungen ergeben sich durch die Stärke und Auslaufgeschwindigkeit des produzierten Faservlieses sowie die zu erzielende Stärke des Kardenbandes. Es hat sich gezeigt, dass ein Abstand der Begrenzungsprofile von 40 mm bei heutigen Hochleistungskarden zu bevorzugen ist.It is further proposed that the transverse belts are provided with two spaced-apart limiting profiles for guiding the fleece belt in the direction of movement of the transverse belts. On an outer surface of the transverse belt facing the fiber fleece or fleece belt, at least two spaced apart boundary profiles are provided which extend over the entire length of the transverse belt. Because the delimitation profiles are arranged on the transverse belt and consequently move with the transverse belt, an occurrence of increased fiber friction and the resulting fiber damage is avoided in comparison to stationary guides. The boundary profiles are advantageously arranged symmetrically on the transverse belt at a distance of 30 mm to 50 mm. The dimensions result from the thickness and the discharge speed of the fiber fleece produced and the thickness of the card sliver to be achieved. It has shown, that a distance between the boundary profiles of 40 mm is preferable for today's high-performance cards.
Bevorzugterweise sind die sich gegenßber liegenden Oberflächen der Vliesbandfßhrer im gleichen Abstand wie die Begrenzungsprofile angeordnet. Dadurch ergibt sich fßr das Vliesband keine weitere Querschnittseinengung in der Richtung quer zur Bewegungsrichtung der Querbänder an der Stelle der Zusammenfßhrung.The opposing surfaces of the fleece tape guides are preferably arranged at the same distance as the boundary profiles. As a result, there is no further cross-sectional constriction for the fleece belt in the direction transverse to the direction of movement of the transverse belts at the point of merging.
Weiter hat es sich gezeigt, dass ein Abstand zwischen dem Vliesbandfßhrer und dem Querband oder der Oberfläche der Begrenzungsprofile vorteilhafterweise 1 mm bis 4 mm beträgt, besonders bevorzugt 3 mm. Dadurch wird den betrieblichen Toleranzen Rechnung getragen. Auch ist der Abstand so gewählt, dass keine den Zusammenfßhrungs-Prozess stÜrenden LuftstrÜmungen auftreten.It has also been shown that a distance between the fleece belt guide and the transverse belt or the surface of the boundary profiles is advantageously 1 mm to 4 mm, particularly preferably 3 mm. This takes into account the operational tolerances. The distance is also chosen so that no air currents interfering with the merging process occur.
Die VliesbandfĂźhrer sind vorteilhafterweise aus einem metallischen Werkstoff gefertigt und mit einer Beschichtung versehen oder alternativ aus einem Kunststoff gefertigt sind. Die zu verwendende Beschichtung oder auch ein verwendeter Kunststoff weisen die notwendigen Gleiteigenschaften zur reibungsminimierten FĂśrderung von Fasern auf. FĂźr verschiedene Fasermaterialien kĂśnnen dabei fĂźr die VliesbandfĂźhrer auch verschiedene Werkstoffe zur Anwendung kommen, da beispielsweise PES-Fasern nicht die gleichen Gleiteigenschaften wie Baumwoll- oder Viskose-Fasern aufweisen. Geeignet sind beispielsweise Beschichtungen mit Hartchrom oder Kunststoffe wie POM.The fleece tape guides are advantageously made from a metallic material and provided with a coating or, alternatively, are made from a plastic. The coating to be used or a plastic used have the necessary sliding properties for the friction-minimized conveyance of fibers. For different fiber materials, different materials can also be used for the fleece belt guide, since, for example, PES fibers do not have the same sliding properties as cotton or viscose fibers. For example, coatings with hard chrome or plastics such as POM are suitable.
Auch wird eine Karde mit einer Bandbildungseinheit vorgeschlagen, wobei in der Bandbildungseinheit zwei VliesbandfĂźhrer nach der obigen Beschreibung vorgesehen sind.A card with a sliver-forming unit is also proposed, two fleece sliver guides as described above being provided in the sliver-forming unit.
Weitere Vorteile der Erfindung sind in den nachfolgenden AusfĂźhrungsbeispielen beschrieben. Es zeigen:
Figur 1- eine schematische Seitenansicht einer Karde nach dem Stand der Technik,
Figur 2- eine schematische Seitenansicht einer Bandbildungseinheit,
Figur 3- eine schematische Draufsicht in Richtung X der Bandbildungseinheit nach der
,Figur 2 Figur 4- eine schematische Ansicht eines erfindungsgemässen Vliesbandfßhrers in Aufriss, Seitenriss und Grundriss.
- Figure 1
- a schematic side view of a card according to the prior art,
- Figure 2
- a schematic side view of a band forming unit,
- Figure 3
- a schematic plan view in direction X of the band forming unit according to FIG
Figure 2 , - Figure 4
- a schematic view of a fleece belt guide according to the invention in elevation, side elevation and plan.
Zur Unterstßtzung der Fßhrung des Vliesbandes 18 zwischen den Querbändern 20 sind Vliesbandfßhrer 27 und 28 angeordnet. Die Vliesbandfßhrer 27 und 28, welche den Raum zwischen den Querbändern 20 und dem Ausgangswalzenpaar 9 und dem Fßhrungstrichter 24 begrenzen, sind oberhalb und unterhalb der Begrenzungsprofile 22 angeordnet. Das Vliesband 18 wird zwischen einer oberen Oberfläche 31 des oberen Vliesbandfßhrers 27 und einer unteren Oberfläche 32 des unteren Vliesbandfßhrers 28 durch die engste Stelle 34 zwischen den Querbändern 20 gefßhrt. Ein Abstand B zwischen den Oberflächen 31 und 32 der Vliesbandfßhrer 27 und 28 entspricht dem Abstand A zwischen den Begrenzungsprofilen 22 der Querbänder 20. Die Vliesbandfßhrer 27 und 28 sind auf der jeweils einem Querband 20 zugewandten Seite an einen Umlenkradius R des Querbandes 20 angeformt und in einem bestimmten Abstand F (siehe
Nachdem das Vliesband 18 die Engstelle zwischen den Querbändern 18 und den Vliesbandfßhrern 27 und 28 durchlaufen hat, wird das Vliesband durch einen Fßhrungstrichter 24 ßbernommen. Der Fßhrungstrichter 24 dient dazu das Vliesband 18 in seiner Ausdehnung zu vermindern und an den Endtrichter 25 weiterzugeben. Aus dem Endtrichter 25 gelangt das Vliesband 18 in ein Druckwalzenpaar 26 Durch das Druckwalzenpaar 26 wird das Vliesband 18 zu einem Kardenband 19 geformt. Eine weitere Funktion des Druckwalzenpaars 26 ist es das Vliesband 18 durch die Trichter 24 und 25 zu ziehen.After the
Die Teile der Oberfläche 33 welche sich beidseitig der Fßhrungsrille 29 im Bereich des Ausgangswalzenpaares 9 (siehe
Die vorliegende Erfindung ist nicht auf die dargestellten und beschriebenen Ausfßhrungsbeispiele beschränkt. Abwandlungen und Kombinationen von Merkmalen im Rahmen der Patentansprßche sind mÜglich.The present invention is not limited to the illustrated and described exemplary embodiments. Modifications and combinations of features within the scope of the claims are possible.
- 11
- KardeCard
- 22
- FĂźllschachtHopper
- 33
- SpeisekanalFeed channel
- 44th
- FaserflockenFiber flakes
- 55
- FĂźllschachtaustragChute discharge
- 66th
- SpeisewalzeFeed roller
- 77th
- AuflĂśsewalzeOpening roller
- 88th
- LuftzufĂźhrungAir supply
- 99
- AusgangswalzenpaarOutput roller pair
- 1010
- SpeisevorrichtungFeeding device
- 1111
- WattenvorlageWadding template
- 1212th
- VorreissermodulLicker-in module
- 1313th
- KardentrommelCard drum
- 1414th
- DeckelaggregatLid unit
- 1515th
- Abnehmercustomer
- 1616
- BandbildungseinheitBanding unit
- 1717th
- FaservliesNon-woven fabric
- 1818th
- VliesbandFleece tape
- 1919th
- KardenbandCard sliver
- 2020th
- QuerbandCross band
- 2121st
- UmlenkrollePulley
- 2222nd
- BegrenzungsprofilBoundary profile
- 2323
- Bewegungsrichtung Faservlies und VliesbandDirection of movement fiber fleece and fleece tape
- 2424
- FĂźhrungstrichterLeadership funnel
- 2525th
- EndtrichterEnd funnel
- 2626th
- DruckwalzenpaarPrint roller pair
- 2727
- Oberer VliesbandfĂźhrerUpper fleece belt guide
- 2828
- Unterer VliesbandfĂźhrerLower fleece belt guide
- 2929
- FĂźhrungsrilleGuide groove
- 3030th
- Bewegungsrichtung QuerbandDirection of movement of the cross belt
- 3131
- Oberfläche oberer VliesbandfßhrerSurface of the upper fleece belt guide
- 3232
- Oberfläche unterer VliesbandfßhrerSurface of the lower fleece belt guide
- 3333
- Geneigte OberflächeInclined surface
- 3434
- Engste Stelle zwischen Querband und VliesbandfĂźhrerNarrowest point between the cross belt and the fleece belt guide
- AA.
- Abstand BegrenzungsprofileDistance of boundary profiles
- BB.
- Abstand VliesbandfĂźhrerDistance fleece belt guide
- CC.
- Abstand QuerbänderDistance between cross belts
- DD.
- Tiefe FĂźhrungsrilleDeep guide groove
- EE.
- Radius FĂźhrungsrilleRadius guide groove
- FF.
- Abstand zwischen VliesbandfĂźhrer und QuerbandDistance between the fleece belt guide and the cross belt
- RR.
- Umlenkradius QuerbandDeflection radius of the cross belt
- ιι
- Neigung Oberfläche VliesbandfßhrerInclination surface of the fleece belt guide
Claims (12)
- A sliver-forming unit (16) for a card (1) having two transverse belts (20) for consolidating a fleece, having at least one guide funnel (24) and one pair of pressure rollers (26) wherein the transverse belts (20) have opposing directions of movement and are arranged at a distance (C) at the deflection points to allow passage of the consolidated fleece strip (18) relative to one another, characterized in that fleece strip guides (27, 28) for guiding the fleece strip (18) to the guide funnel (24) are arranged between the transverse belts (20), wherein guidance of the fleece strip (18) to the guide funnel (24) at a right angle to the direction of movement of the transverse belts (20) and to the direction of movement (23) of the fiber fleece (17) is provided by the fleece strip guides (27, 28).
- The sliver-forming unit (16) according to claim 1, characterized in that in the direction of movement (23) of the fiber fleece (17), the fleece strip guides (27, 28) have a shape adapted concentrically to a deflection radius (R) of the transverse belts (20) at the deflection point, at least up to a narrowest point (34) between the transverse belts (18).
- The sliver-forming unit (16) according to claim 1 or 2, characterized in that , at least downstream from a narrowest point (34) between the transverse belts (20), the fleece strip guides (27, 28) are designed in the direction of movement (23) of the fiber fleece (17) with a steadily increasing distance (F) between the transverse belt (20) and the fleece strip guide (27, 28).
- The sliver-forming unit (16) according to any one of the preceding claims, characterized in that opposing surfaces (31) of the fleece strip guides (27, 28) have an inclination (a) on the side facing away from the guide funnel (24), such that the inclination (a) causes an increase in the distance (B) between the surfaces (31, 32) of the fleece strips guides (27, 28) with an increase in the distance from the guide funnel (24).
- The sliver-forming unit (16) according to claim 4, characterized in that the opposing surfaces (31, 32) of the fleece strip guides (27, 28) each have a guide groove (29).
- The sliver-forming unit (16) according to claim 5, characterized in that the guide grooves (29) have a depth (D) of 1 mm to 5 mm and a radius (E) of 8 mm to 20 mm.
- The sliver-forming unit (16) according to any one of claims 4 to 6, characterized in that the inclined surfaces (33) are designed with a downward slope on both sides of the guide groove (29) in the direction of the respective transverse belt (20).
- The sliver-forming unit (16) according to any one of the preceding claims, characterized in that the transverse belts (20) are provided with two bordering profiles (22) arranged at a distance (A) to guide the fleece strip (18) in the direction of movement of the transverse belts (30).
- The sliver-forming unit (16) according to claim 4, characterized in that the opposing surfaces (31, 32) of the fleece strip guides (27, 28) are arranged at the distance (A) of the bordering profiles (22).
- The sliver-forming unit (16) according to any one of the preceding claims, characterized in that the distance (F) between the fleece strip guide (27, 28) and the transverse belt (20) or the surface of the bordering profiles (22) amounts to 1 mm to 4 mm.
- The sliver-forming unit (16) according to any one of the preceding claims, characterized in that the fleece strip guides (27, 28) are made of a metal material and are provided with a coating or are made of a plastic.
- A card (1) having a sliver-forming unit (16) according to any one of claims 1 to 11.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CH00374/18A CH714818A1 (en) | 2018-03-21 | 2018-03-21 | Tape forming unit for a card. |
Publications (2)
Publication Number | Publication Date |
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EP3543386A1 EP3543386A1 (en) | 2019-09-25 |
EP3543386B1 true EP3543386B1 (en) | 2021-05-12 |
Family
ID=65717864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP19160976.7A Active EP3543386B1 (en) | 2018-03-21 | 2019-03-06 | Tape forming unit for a card |
Country Status (3)
Country | Link |
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EP (1) | EP3543386B1 (en) |
CN (1) | CN110295418B (en) |
CH (1) | CH714818A1 (en) |
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CN2075212U (en) * | 1990-10-13 | 1991-04-17 | ĺ˝čĽéĺ˛çşşçťćşć˘°ĺ | Condenser for carding |
IT1268416B1 (en) * | 1992-12-04 | 1997-02-27 | Truetzschler & Co | DEVICE OF A CARD FOR THE COLLECTION AND GROUPING OF A VEIL OF FIBERS OUTPUT FROM A DISPENSER OF A CARD |
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DE19823571A1 (en) * | 1997-09-08 | 1999-03-11 | Truetzschler Gmbh & Co Kg | Device on a spinning preparation machine, in particular a card, draw frame or the like, with a fiber guiding member |
GB9722279D0 (en) * | 1997-10-23 | 1997-12-17 | Carding Spec Canada | Method and apparatus for forming a sliver |
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DE50307306D1 (en) * | 2002-02-26 | 2007-07-05 | Rieter Ag Maschf | Method and device for cleaning the leaving zone on a carding machine |
DE102004004433A1 (en) * | 2004-01-28 | 2005-08-18 | TrĂźtzschler GmbH & Co KG | Device on a spinning machine, in particular carding machine, cleaner o. The like., For mounting a clothing on a roller |
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2018
- 2018-03-21 CH CH00374/18A patent/CH714818A1/en not_active Application Discontinuation
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- 2019-03-20 CN CN201910213645.6A patent/CN110295418B/en active Active
Non-Patent Citations (1)
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CN110295418A (en) | 2019-10-01 |
CN110295418B (en) | 2022-11-11 |
CH714818A1 (en) | 2019-09-30 |
EP3543386A1 (en) | 2019-09-25 |
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