EP2304085B1 - Apron guide device for a drawing system top roller - Google Patents
Apron guide device for a drawing system top roller Download PDFInfo
- Publication number
- EP2304085B1 EP2304085B1 EP08802346A EP08802346A EP2304085B1 EP 2304085 B1 EP2304085 B1 EP 2304085B1 EP 08802346 A EP08802346 A EP 08802346A EP 08802346 A EP08802346 A EP 08802346A EP 2304085 B1 EP2304085 B1 EP 2304085B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- apron
- guide
- guide device
- base body
- top roller
- 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.)
- Not-in-force
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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
- D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
-
- 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
- D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons
-
- 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
- D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
- D01H5/88—Cradles; Tensors
Definitions
- the invention relates to a Riemchen operations adopted for guiding a drafting a top roller with an elastic cover looping around the belt, the Riemchen Entrys acquired includes a receptacle for the drafting top roller and guide surfaces for the strap.
- a Riemchen entrys worn of this kind is from the DE 103 48 452 A1 known.
- the known Riemchen Operations learned is made in one piece, wherein the straps are subjected substantially only to that tensile stress, which is caused by their endeavor to assume approximately circular shape in the circumferential direction. Due to the one-piece design of the Riemchen operations, issued the Riemchen Operationss issued, in particular in the embodiment as a plastic injection molded part, only consist of a single material. The selection of the material requires compromises, since at different points of the Riemchen Entrys learned different requirements are placed on the material.
- the invention has for its object to improve the Riemchen enclosures worn.
- the Riemchen Installations shark comprises a main body and a base member attached to the guide member, wherein the base body contains the receptacle for the drafting top roller and wherein the guide member includes at least one guide surface for the strap.
- the two-part embodiment of the apron guiding device separates the two most important functions to be achieved by the apron guiding device, namely the guiding of the apron and the fastening of the apron guiding device to the axis of the drafting system upper roller.
- the function of attaching and holding the Riemchen Operationss worn is taken from the body, which contains the receptacle for the axis of the drafting top roller.
- the main body can be made for example of a glass fiber or carbon fiber reinforced plastic. Such a plastic ensures high stability of the body and prevents excessive deformation under the external loading forces.
- the guide surfaces for the strapping are arranged on a guide component separate from the main body.
- the guide component can be fastened to the base body and can be designed such that it is only subjected to very little load by operating forces.
- a particularly slippery plastic which need not contain reinforcement by glass or carbon fibers.
- Gleitfreudiger plastic is particularly suitable a plastic which consists at least in part of polytetrafluoroethylene.
- the wear of the strap can be reduced thereby and the service life of the strap increases.
- the friction losses which require an increased drive torque of the drafting system sub-roller, can be minimized.
- the wear preferably occurs on the guide component, which can optionally be easily and inexpensively replaced.
- the guide member from a wear-resistant material such as ceramic or steel, which is polished on the guide surfaces for the strap.
- Drawframe top rollers in drafting systems for warping staple fiber bundles are often designed as top roller twins.
- An upper roller twin comprises two drafting rollers, each with an elastic reference, which are freely rotatably mounted on a fixed axle. The axle is received in its central region by a load carrier of the drafting system.
- an upper roller twin can also be designed as a so-called fixed roller, in which the two drafting top rollers are rotatably connected to an axle, wherein for supporting the axle, a sleeve is provided which surrounds the axis of the fixed roller and which is then accommodated on the load carrier.
- the upper roller twin is designed as a fixed roller, the receptacle of the main body of the Riemchen extractions liked is of course designed so that the recording on the axis of the drafting top roller surrounding sleeve can be placed.
- the Riemchen Entrys worn for an Oberwalzenzwilling includes two fixed to the main body guide components for the adjacent drafting crown upper rollers.
- the two guide components at different distances from each other on the base body can be fastened, wherein the guide members parallel to the axial direction of the drafting top roller can be displaced and positioning means may be provided for the guide member, which allow attachment of the guide members on the body only at predetermined intervals.
- This embodiment has the advantage that the apron guiding means for different-pitch upper-twin twins, i. Obervvalzenzwillinge with different distances far apart elastic covers of the two drafting crown rolls, is used.
- the Riemchenschreib is only generated by the fact that the straps strives to assume approximately circular shape in the circumferential direction.
- the strap guiding device contains a tensioning element that is spring-loaded.
- the clamping element can be arranged both on the main body and on the guide member and can be formed for example by an additional plastic bottle. It can also be provided that the clamping element are formed by a spring-loaded guide surface of the guide component. For example, the tread alone or the entire guide element can be sprung with tread.
- the Riemchen exchanges worn may include an obliquely arranged to the Riemchenlaufraum scraper edge.
- the wiper edge is used to clean the strap of any adhering fibers.
- the wiper edge can be made to touch the strap slightly or to be non-contact at a minimum distance from the strap.
- FIGS. 1 and 2 is a drafting 1 for warping a staple fiber strand 2 shown schematically.
- the drafting 1 consists - as in FIG. 2 recognizable - from a plurality of roller pairs 3, 4 and 5, 6, which transport the staple fiber strand 2 in the transport direction A and distort it to the desired fineness.
- the lower rollers 3 and 5 are driven.
- the upper rollers 4 and 6 are held in a load carrier 7 and are pressed against the lower rollers 3 and 5.
- the pair of rollers 3, 4 are arranged in a conventional manner effetsriemchen 8 and 9 for guiding the staple fiber strand in the drafting zone between the nip line 10 of the pair of rollers 3, 4 and the nip line 11 of the pair of rollers 5, 6.
- the top roller 6 is provided with an elastic cover 12 made of a rubber-like material. To protect the elastic cover 12 against excessive wear by the staple fiber strand 2 of the top roller 6 is associated with a strap 13 which wraps around the elastic cover 12. To guide the strap 13 a Riemchen arrangements worn 14 is provided.
- the Riemchen Operations prepared 14 includes a receptacle 15 for the axis 16 of the drafting top roller 6 and a tread 17 for the strap 13.
- the Riemchen Operations prepared 14 is disposed on the output top roller 6 of the drafting 1, so that the strap 13 forms the nip line 11 at which the Delay of the fiber structure 2 is completed.
- the wear of the upper roller 6 is particularly strong, since there the Urrifangsgeschwirmaschine the rollers 5, 6 is highest.
- drafting units 1 are arranged side by side, as is the case for example with drafting systems ° 1 for ring spinning machines.
- the lower rollers 3 and 5 designed as in the machine longitudinal direction continuous sub-cylinder, as in FIG. 1 to recognize.
- the two drafting top rollers 6 of the adjacent drafting units 1 are arranged freely rotatably on a common axis 16.
- the axle 16 is fixedly received in a holder 18 which is fixed to the Betastungs synonym 17 and through which the drafting top rollers 6 are pressed against the lower roller 5.
- the two top rollers 6 and the axle 16 form a so-called top roller twin.
- the elastic covers 12 of the two upper rollers 6 of the Oberwalzenzwillings 19 are each wrapped by a strap 13.
- the receptacle 15 surrounds the holder 18 fork-shaped and is clipped onto the axis 16.
- the Riemchen Installations worn 14 is designed in two parts and a base body 20 and a guide member 21 for each strap 13 contains.
- the main body contains the receptacle 15 for the axis 16 of the Oberwalzenzwillings 19 and is made of a stable material that can absorb the loading forces occurring during operation.
- the main body 20 is preferably made of a fiber-reinforced plastic.
- the guide member 21 includes the tread 17 and two side guides 22, all of which together are referred to as guide surfaces for the strap 13.
- the guide member consists of a sliding plastic, so that the strap 13 on the guide surfaces 17 and 22 finds little resistance.
- Each guide member 21 is attached via receptacles 23 and 24 on the main body 20.
- the guide component 21 can be pushed onto the base body 20 parallel to the axial direction of the drafting unit upper roller 6.
- positioning means 25 in the form of a pin 26 on the guide member 21 and a plurality of grooves 27 on the base body 20 to ensure positioning of the two guide members 21 at predetermined distances from each other.
- Oberwalzenzwillinge 19 different division B are used.
- the pitch B corresponds to the distance of the distorted in adjacent drafting 1 staple fiber assemblies 2.
- the covers 12 of the Oberwalzenzwillings 19 also have a pitch corresponding to the pitch.
- the side guides 22 of the Riemchen operations worn 14 must be coordinated with the division of Obervvalzenzwillings 19 so that the straps 13 run exactly on the covers 12. Due to the adjustability of the guide members 21 and the positioning means 25, the Riemchen Entrys worn 14 invention Oberwalzenzwillingen 19 different pitch B are used without a large adjustment effort is necessary.
- the number and the position of the grooves 27 in the base body 20 is matched to the divisions used in practice B of Oberwalzenzwillinge 19.
- the replacement of a single strap 13 can be simplified.
- the guide member 21 can be pushed down with the strap 13 in the axial direction of the top rollers 6 from the base body 20.
- the strap does not need to be pulled over the side guide 22. It is thus possible to provide relatively high side guides 22, which still ensure a good guidance of the strap 13, when the elastic cover 12 must be reground and thereby reduces its diameter.
- the increased side guides 22 ensure a safe Riemchen Installation even with reduced diameter of the drafting top roller 6 without an additional clamping element must be present.
- the wiping edge 28 is arranged on the inside of the strap 13 obliquely to Riemchenlaufraum C.
- the wiper edge 28 preferably touches the strap 13 very easily. Due to the inclination of the wiping edge in relation to the Riemchenlaufraum C is possibly stripped on the inside of the strap 13 adhering dirt and conveyed out laterally.
- the strap 13, which wraps around the elastic cover 12 of the drafting top roller 6, can be designed differently.
- the strap 13 may, for example, be designed like a guide strap 8 and have at least on its outer surface a layer of a rubber-like material.
- the strap 13 may also be designed as a so-called Siebriemchen, which consists of an air-permeable fabric. Such Siebriemchen are usually used in the drafting 1 downstream compression equipment for compacting the finished warped staple fiber.
- the scope of the Strap 13 is preferably selected according to the staple length of the fibers present in staple fiber strand 2 and should preferably be greater than the staple length. Such a sized circumference of the strap 13 effectively prevents the formation of unwanted coils on the strap 13, even if the diameter of the drafting top roller 6 is chosen to be relatively small.
- a straight line through the center of the axis 16 and the center of the tread 17 has an angle of about 90 ° to the stretching field plane.
- the drafting system 1 is usually angeorndnet in the ring spinning machine so that the stretching field plane is not horizontal.
- the stretching field plane can, for example, extend at an angle of 45 ° to the floor. It may be advantageous that the angle between the stretching field plane and the straight line defined by the center of the axis 16 and the center of the running surface 17 corresponds approximately to the angle between the stretching field plane and the floor. As a result, the Riemchen extractions worn 14 is approximately horizontal.
- the angle between the stretching field plane and the straight line passing through the center of the axis 16 and the center of the running surface 17 may preferably be about 45 °.
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Abstract
Description
Die Erfindung betrifft eine Riemchenführungseinrichtung zur Führung eines eine Streckwerksoberwalze mit einem elastischen Bezug umschlingenden Riemchens, wobei die Riemchenführungseinrichtung eine Aufnahme für die Streckwerksoberwalze und Führungsflächen für das Riemchen enthält.The invention relates to a Riemchenführungseinrichtung for guiding a drafting a top roller with an elastic cover looping around the belt, the Riemchenführungseinrichtung includes a receptacle for the drafting top roller and guide surfaces for the strap.
Eine Riemchenführungseinrichtung dieser Art ist aus der
Der Erfindung liegt die Aufgabe zugrunde, die Riemchenführungseinrichtung zu verbessern.The invention has for its object to improve the Riemchenführungseinrichtung.
Die Aufgabe wird dadurch gelöst, dass die Riemchenführungseinrichtung einen Grundkörper und ein am Grundkörper befestigtes Führungsbauteil aufweist, wobei der Grundkörper die Aufnahme für die Streckwerksoberwalze enthält und wobei das Führungsbauteil wenigstens eine Führungsfläche für das Riemchen enthält.The object is achieved in that the Riemchenführungseinrichtung comprises a main body and a base member attached to the guide member, wherein the base body contains the receptacle for the drafting top roller and wherein the guide member includes at least one guide surface for the strap.
Die zweiteilige Ausgestaltung der Riemchenführungseinrichtung trennt die beiden wichtigsten Funktionen, die von der Riemchenführungseinrichtung erreicht werden sollen, nämlich das Führen des Riemchens und das Befestigen der Riemchenführungseinrichtung an der Achse der Streckwerksoberwalze. Die Funktion des Befestigens und Haltens der Riemchenführungseinrichtung wird von dem Grundkörper übernommen, der die Aufnahme für die Achse der Streckwerksoberwalze enthält. Der Grundkörper kann beispielsweise aus einem glasfaser- oder kohlefaserverstärkten Kunststoff ausgeführt werden. Ein derartiger Kunststoff gewährleistet eine hohe Stabilität des Grundkörpers und verhindert eine zu großer Verformung unter den äußeren Belastungskräften. Diese stabilen Kunststoffe haben den Nachteil, dass sie als Gleitpartner ungeeignet sind, da sie einen relativ hohen Reibungskoeffizient haben und da der bei der Gleitreibung entstehenden Verschleiß zu abstehenden Glas- bzw. Kohlefasern an der Oberfläche führt. Diese abstehenden Fasern führen zu erhöhtem Verschleiß an dem Gleitpartner. Bei der erfindungsgemäßen Riemchenführungseinrichtung sind deshalb die Führungsflächen für das Riemchen an einem vom Grundkörper getrennten Führungsbauteil angeordnet. Das Führungsbauteil ist am Grundkörper befestigbar und kann so gestaltet werden, dass es nur sehr gering durch Betriebskräfte belastet wird. Für das Führungsbauteil kann deshalb in vorteilhafter Weise ein besonders gleitfreudiger Kunststoff eingesetzt werden, der keine Verstärkung durch Glas- oder Kohlefasern enthalten muss. Als gleitfreudiger Kunststoff eignet sich insbesondere ein Kunststoff der wenigstens zu einem Teil aus Polytetrafluorethylen besteht. Der Verschleiß des Riemchens lässt sich dadurch verringern und die Standzeit des Riemchens erhöht sich. Außerdem lassen sich die Reibungsverluste, die ein erhöhtes Antriebsmoment der Streckwerksunterwalze erfordern, minimieren. Der Verschleiß tritt bevorzugt an dem Führungsbauteil auf, das gegebenenfalls leicht und kostengünstig ausgetauscht werden kann.The two-part embodiment of the apron guiding device separates the two most important functions to be achieved by the apron guiding device, namely the guiding of the apron and the fastening of the apron guiding device to the axis of the drafting system upper roller. The function of attaching and holding the Riemchenführungseinrichtung is taken from the body, which contains the receptacle for the axis of the drafting top roller. The main body can be made for example of a glass fiber or carbon fiber reinforced plastic. Such a plastic ensures high stability of the body and prevents excessive deformation under the external loading forces. These stable plastics have the disadvantage that they are unsuitable as sliding partners, since they have a relatively high coefficient of friction and since the resulting wear during sliding friction leads to protruding glass or carbon fibers on the surface. These protruding fibers lead to increased wear on the sliding partner. In the case of the apron guiding device according to the invention, therefore, the guide surfaces for the strapping are arranged on a guide component separate from the main body. The guide component can be fastened to the base body and can be designed such that it is only subjected to very little load by operating forces. For the guide component can therefore be used advantageously a particularly slippery plastic, which need not contain reinforcement by glass or carbon fibers. As Gleitfreudiger plastic is particularly suitable a plastic which consists at least in part of polytetrafluoroethylene. The wear of the strap can be reduced thereby and the service life of the strap increases. In addition, the friction losses, which require an increased drive torque of the drafting system sub-roller, can be minimized. The wear preferably occurs on the guide component, which can optionally be easily and inexpensively replaced.
In alternativer Ausgestaltung ist es jedoch auch möglich, das Führungsbauteil aus einem verschleißfestem Material wie beispielsweise Keramik oder Stahl herzustellen, der an den Führungsflächen für das Riemchen poliert ist.In an alternative embodiment, however, it is also possible to produce the guide member from a wear-resistant material such as ceramic or steel, which is polished on the guide surfaces for the strap.
Streckwerksoberwalzen in Streckwerken zum Verziehen von Stapelfaserverbänden sind oftmals als Oberwalzenzwillinge ausgestaltet. Ein Oberwalzenzwilling enthält zwei Streckwerksoberwalzen mit jeweils einem elastischen Bezug, die frei drehbar auf einer feststehenden Achse angeordnet sind. Die Achse ist in ihrem mittleren Bereich von einem Belastungsträger des Streckwerks aufgenommen. Alternativ kann ein Oberwalzenzwilling auch als sogenannte Festwalze gestaltet sein, bei der die beiden Streckwerksoberwalzen drehfest mit einer Achse verbunden sind, wobei zur Lagerung der Achse eine Hülse vorgesehen ist, die die Achse der Festwalze umgibt und die dann am Belastungsträger aufgenommen ist. Wenn der Oberwalzenzwilling als Festwalze ausgestaltet ist, ist die Aufnahme des Grundkörpers der Riemchenführungseinrichtung selbstverständlich so ausgebildet, dass die Aufnahme auf die die Achse der Streckwerksoberwalze umgebende Hülse aufsetzbar ist.Drawframe top rollers in drafting systems for warping staple fiber bundles are often designed as top roller twins. An upper roller twin comprises two drafting rollers, each with an elastic reference, which are freely rotatably mounted on a fixed axle. The axle is received in its central region by a load carrier of the drafting system. Alternatively, an upper roller twin can also be designed as a so-called fixed roller, in which the two drafting top rollers are rotatably connected to an axle, wherein for supporting the axle, a sleeve is provided which surrounds the axis of the fixed roller and which is then accommodated on the load carrier. If the upper roller twin is designed as a fixed roller, the receptacle of the main body of the Riemchenführungseinrichtung is of course designed so that the recording on the axis of the drafting top roller surrounding sleeve can be placed.
Bei einer Riemchenführungseinrichtung für einen Oberwalzenzwilling ist es vorteilhaft, dass die Riemchenführungseinrichtung zwei am Grundkörper befestigte Führungsbauteile für die benachbarten Streckwerksoberwalzen enthält. Bevorzugt sind die beiden Führungsbauteile in unterschiedlichen Abständen zueinander am Grundkörper befestigbar, wobei die Führungsbauteile parallel zur Achsrichtung der Streckwerksoberwalze verschiebbar sein können und wobei Positioniermittel für die Führungsbauteil vorgesehen sein können, die eine Befestigung der Führungsbauteile am Grundkörper nur in vorbestimmten Abständen zulassen. Diese Ausgestaltung hat den Vorteil, dass die Riemchenführungseinrichtung für Oberwalzenzwillinge mit unterschiedlicher Teilung, d.h. Obervvalzenzwillinge mit unterschiedlich weit voneinander entfernten elastischen Bezügen der beiden Streckwerksoberwalzen, verwendbar ist. Für Oberwalzenzwillinge unterschiedlicher Teilung ist nur ein einziger Grundkörper notwendig. Die der Teilung entsprechende Position der Führungsflächen für das Riemchen wird dadurch ermöglicht, dass das Führungsbauteil in der entsprechenden Position am Grundkörper befestigt wird. Beide Führungsbauteile mit den Führungsflächen für das Riemchen sind dabei bevorzugt identisch ausgestaltet, dass jedes zur Führung an beiden Riemchen eines Oberwalzenzwillings verwendbar ist. Die Teilevielfalt lässt sich dadurch stark verringern.In a Riemchenführungseinrichtung for an Oberwalzenzwilling, it is advantageous that the Riemchenführungseinrichtung includes two fixed to the main body guide components for the adjacent drafting crown upper rollers. Preferably, the two guide components at different distances from each other on the base body can be fastened, wherein the guide members parallel to the axial direction of the drafting top roller can be displaced and positioning means may be provided for the guide member, which allow attachment of the guide members on the body only at predetermined intervals. This embodiment has the advantage that the apron guiding means for different-pitch upper-twin twins, i. Obervvalzenzwillinge with different distances far apart elastic covers of the two drafting crown rolls, is used. For Oberwalzenzwillinge different division only a single body is necessary. The division of the corresponding position of the guide surfaces for the strapping is made possible by the fact that the guide member is fixed in the corresponding position on the base body. Both guide components with the guide surfaces for the strap are preferably configured identically that each can be used for guiding on both straps of Oberwalzenzwillings. The variety of parts can be greatly reduced.
Da die Teilung von Oberwalzenzwillingen nur gewisse vordefinierte Werte, beispielsweise 70, 75 oder 82,5 mm, annimmt, ist es vorteilhaft, Positioniermittel für die Führungsbauteile vorzusehen, die eine Positionierung der Führungsbauteile am Grundkörper nur in den vorbestimmten Abständen der verschiedenen Teilungen zulassen. Die Anpassung der Riemchenführungseinrichtung an die unterschiedlichen Teilungen kann dadurch ohne großen Einstellaufwand erfolgen.Since the division of upper roll twins assumes only certain predefined values, for example 70, 75 or 82.5 mm, it is advantageous to provide positioning means for the guide components which allow positioning of the guide components on the base body only at the predetermined intervals of the various pitches. The adaptation of the Riemchenführungseinrichtung to the different divisions can be done without much adjustment effort.
Wie auch in der bekannten Riemchenführungseinrichtung der
In weiterer Ausgestaltung der Erfindung kann die Riemchenführungseinrichtung eine schräg zur Riemchenlaufrichtung angeordnete Abstreifkante enthalten. Die Abstreifkante dient zur Reinigung des Riemchens von eventuell anhaftenden Fasern. Die Abstreifkante kann so ausgeführt werden, das sie das Riemchen leicht berührt oder berührungsfrei in einem minimalen Abstand zum Riemchen angeordnet ist.In a further embodiment of the invention, the Riemchenführungseinrichtung may include an obliquely arranged to the Riemchenlaufrichtung scraper edge. The wiper edge is used to clean the strap of any adhering fibers. The wiper edge can be made to touch the strap slightly or to be non-contact at a minimum distance from the strap.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels.Further advantages and features of the invention will become apparent from the following description of an embodiment.
Es zeigen
-
Figur.1 eine Frontansicht auf einen Oberwalzenzwilling mit einer erfindungsgemäßen Riemchenführungseinrichtung, -
eine entlang der Schnittfläche II-II derFigur 2 geschnittene Seitenansicht.Figur 1
-
Figur.1 a front view of an upper roller twin with a Riemchenführungseinrichtung invention, -
FIG. 2 one along the section II-II ofFIG. 1 cut side view.
In den
Die Riemchenführungseinrichtung 14 enthält eine Aufnahme 15 für die Achse 16 der Streckwerksoberwalze 6 und eine lauffläche 17 für das Riemchen 13. Bevorzugt ist die Riemchenführungseinrichtung 14 an der Ausgangsoberwalze 6 des Streckwerks 1 angeordnet, so dass das Riemchen 13 die Klemmlinie 11 bildet, an der der Verzug des Faserverbandes 2 beendet ist. An der Ausgangsklemmlinie 11 ist der Verschleiß der Oberwalze 6 besonders stark, da dort die Urrifangsgeschwiridigkeit der Walzen 5, 6 am höchsten ist.The
Oftmals sind mehrere Streckwerke 1 nebeneinander angeordnet, wie es beispielsweise bei Streckwerken°1 für Ringspinnmaschinen der Fall ist. Hierbei sind die Unterwalzen 3 und 5 als in Maschinenlängsrichtung durchlaufende Unterzylinder gestaltet, wie in
Erfindungsgemäß ist vorgesehen, das die Riemchenführungseinrichtung 14 zweiteilig gestaltet ist und einen Grundkörper 20 und ein Führungsbauteil 21 für jedes Riemchen 13 enthält. Der Grundkörper enthält die Aufnahme 15 für die Achse 16 des Oberwalzenzwillings 19 und ist aus einem stabilen Material hergestellt, dass die beim Betrieb auftretenden Belastungskräfte aufnehmen kann. Der Grundkörper 20 besteht bevorzugt aus einem faserverstärkten Kunststoff. Das Führungsbauteil 21 enthält die Lauffläche 17 und zwei Seitenführungen 22, die alle drei zusammen als Führungsflächen für das Riemchen 13 bezeichnet werden. Das Führungsbauteil besteht aus einem gleitfreudigen Kunststoff, so dass das Riemchen 13 an den Führungsflächen 17 und 22 nur wenig Widerstand findet. Jedes Führungsbauteil 21 ist über Aufnahmen 23 und 24 am Grundkörper 20 befestigt. Das Führungsbauteil 21 ist parallel zur Achsrichtung der Streckwerksoberwalze 6 auf den Grundkörper 20 aufschiebbar. Es sind Positioniermittel 25 in Form eines Zapfens 26 am Führungsbauteil 21 und mehrerer Nuten 27 am Grundkörper 20 vorgesehen, um eine Positionierung der beiden Führungsbauteile 21 in vorbestimmten Abständen zueinander zu gewährleisten.According to the invention it is provided that the
In der Praxis werden Oberwalzenzwillinge 19 unterschiedlicher Teilung B eingesetzt. Die Teilung B entspricht dem Abstand der in benachbarten Streckwerken 1 verzogenen Stapelfaserverbände 2. Die Bezüge 12 des Oberwalzenzwillings 19 haben ebenfalls einen der Teilung entsprechenden Abstand. Die Seitenführungen 22 der Riemchenführungseinrichtung 14 müssen auf die Teilung des Obervvalzenzwillings 19 abgestimmt sein, damit die Riemchen 13 genau auf den Bezügen 12 laufen. Durch die Verstellbarkeit der Führungsbauteile 21 und die Positioniermittel 25 kann die erfindungsgemäße Riemchenführungseinrichtung 14 an Oberwalzenzwillingen 19 unterschiedlicher Teilung B eingesetzt werden, ohne dass ein großer Einstellaufwand notwendig ist. Die Anzahl und die Position der Nuten 27 im Grundkörper 20 ist auf die in der Praxis verwendeten Teilungen B der Oberwalzenzwillinge 19 abgestimmt.In
Durch die Verschiebbarkeit der Führungsbauteile 21 in Achsrichtung der Streckwerksoberwalzen 6 kann auch der Austausch eines einzelnen Riemchens 13 vereinfacht werden. Das Führungsbauteil 21 kann mit dem Riemchen 13 in Achsrichtung der Oberwalzen 6 vom Grundkörper 20 heruntergeschoben werden. Das Riemchen braucht nicht über die Seitenführung 22 hinübergezogen.zu werden. Es ist dadurch möglich relativ hohe Seitenführungen 22 vorzusehen, die auch dann noch eine gute Führung des Riemchens 13 gewährleisten, wenn der elastische Bezug 12 nachgeschliffen werden muss und sich dadurch sein Durchmesser verkleinert. Die erhöhten Seitenführungen 22 gewährleisten auch bei verkleinertem Durchmesser der Streckwerksoberwalze 6 eine sichere Riemchenführung ohne dass ein zusätzliches Spannelement vorhanden sein muss.Due to the displaceability of the
In nicht dargestellter Ausgestaltung kann es für gewisse Anwendungsfälle doch vorteilhaft sein, ein zusätzliches Spannelement vorzusehen und beispielsweise zwischen der Streckwerksoberwalze 6 und dem Führungsbauteil 21 anzuordnen. Es kann auch vorteilhaft sein, das Führungsbauteil 21 elastisch über eine Feder am Grundkörper 20 zu befestigen, so dass das Riemchen 13 mit etwas größerer Kraft gespannt ist.In an embodiment, not shown, it may be advantageous for certain applications to provide an additional clamping element and, for example, to arrange between the drafting
Zur Verhinderung, dass sich auf der Innenseite des Riemchens 13 Faserablagerungen bilden, die dem Lauf des Riemchens 13 erschweren, kann es als Option vorteilhaft sein, dass eine Abstreifkante 28 zur Reinigung des Riemchens 13 vorgesehen ist. Die Abstreifkante 28 ist auf der Innenseite des Riemchens 13 schräg zur Riemchenlaufrichtung C angeordnet. Die Abstreifkante 28 berührt dabei bevorzugt das Riemchen 13 ganz leicht. Durch die Schrägstellung der Abstreifkante in Bezug auf die Riemchenlaufrichtung C wird eventuell auf der Innenseite des Riemchens 13 anhaftender Schmutz abgestreift und seitlich herausgefördert.To prevent the formation of fiber deposits on the inner side of the
Das Riemchen 13, das den elastischen Bezug 12 der Streckwerksoberwalze 6 umschlingt kann unterschiedlich gestaltet sein. Das Riemchen 13 kann beispielsweise wie ein Führungsriemchen 8 ausgeführt sein und wenigstens auf seiner Außenfläche eine Schicht aus einem gummiartigen Material aufweisen. Alternativ kann das Riemchen 13 jedoch auch als sogenanntes Siebriemchen gestaltet sein, das aus einem luftdurchlässigen Gewebe besteht. Solche Siebriemchen werden üblicherweise bei dem Streckwerk 1 nachgeordneten Verdichtungseinrichtungen zur Kompaktierung des fertig verzogenen Stapelfaserverbandes eingesetzt. Der Umfang des Riemchens 13 wird bevorzugt nach der Stapellänge der im Stapelfaserverband 2 vorhandenen Fasern ausgewählt und sollte bevorzugt größer als die Stapellänge sein. Ein so bemessener Umfang des Riemchens 13 verhindert wirkungsvoll die Bildung von unerwünschten Wickeln am Riemchen 13, auch wenn der Durchmesser der Streckwerksoberwalze 6 relativ klein gewählt wird.The
In
Claims (7)
- Apron guide device for guiding an apron (13) surrounding a drafting unit top roller (6) with an elastic cover (12), wherein the apron guide device comprises a holder (15) for the drafting unit top roller (6) and guide surfaces for the apron (13), characterized in that the apron guide device (14) has a base body (20) and a guide component (21) fastened to the base body (20), wherein the base body (20) comprises the holder (15) for the drafting unit top roller (6) and the guide component (21) comprises at least one guide surface (17; 22) for the apron (13).
- Apron guide device according to Claim 1, characterized in that the apron guide device (14) comprises two guide components (21) fastened to the base body (20) for adjacent drafting unit top rollers (6) of a double top roller (19).
- Apron guide device according to Claim 2, characterized in that the two guide components (21) can be fastened to the base body (20) at different intervals to one another.
- Apron guide device according to Claim 3, characterized in that the apron guide device (14) comprises positioning means (25) for the guide components (21) that permit fastening of the guide components (21) to tho base body (20) only at predetermined intervals.
- Apron guide device according to one of Claims 1 to 4, characterized in that a guide component (21) is movable parallel to the axial direction of the drafting unit top roller (6).
- Apron guide device according to one of Claims 1 to 5, characterized in that the apron guide device (14) comprises a spring-loaded tensioning element.
- Apron guide device according to one of Claims 1 to 6, characterized in that the apron guide device (14) comprises a stripping edge (28) arranged at an angle to the apron running direction (C).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008010364A DE102008010364A1 (en) | 2008-02-18 | 2008-02-18 | Riemchenführungseinrichtung for a drafting top roller |
PCT/EP2008/007825 WO2009103318A1 (en) | 2008-02-18 | 2008-09-18 | Apron guide device for a drawing system top roller |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2304085A1 EP2304085A1 (en) | 2011-04-06 |
EP2304085B1 true EP2304085B1 (en) | 2012-05-30 |
Family
ID=40149773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08802346A Not-in-force EP2304085B1 (en) | 2008-02-18 | 2008-09-18 | Apron guide device for a drawing system top roller |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2304085B1 (en) |
CN (1) | CN101952494A (en) |
BR (1) | BRPI0822295A2 (en) |
DE (1) | DE102008010364A1 (en) |
TR (1) | TR201006816T1 (en) |
WO (1) | WO2009103318A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB531114A (en) * | 1939-07-12 | 1940-12-30 | John Schofield | Improvements in mechanism for drawing fibres in textile machines |
SU701181A1 (en) * | 1977-11-21 | 1981-09-07 | Ташкентское Специальное Конструкторское Бюро Текстильных Машин | Upper lattice of double-belt stretching device of textile machine |
DE10348452B4 (en) | 2003-10-17 | 2008-07-03 | Deutsche Institute für Textil- und Faserforschung Stuttgart | Drafting system with twin top rollers wrapped in aprons |
ES1060770Y (en) * | 2005-08-03 | 2006-02-16 | Pinter Sa | TENSOR FOR CONDENSATION BAGS. |
-
2008
- 2008-02-18 DE DE102008010364A patent/DE102008010364A1/en not_active Withdrawn
- 2008-09-18 EP EP08802346A patent/EP2304085B1/en not_active Not-in-force
- 2008-09-18 CN CN2008801269766A patent/CN101952494A/en active Pending
- 2008-09-18 TR TR2010/06816T patent/TR201006816T1/en unknown
- 2008-09-18 BR BRPI0822295A patent/BRPI0822295A2/en not_active IP Right Cessation
- 2008-09-18 WO PCT/EP2008/007825 patent/WO2009103318A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2009103318A1 (en) | 2009-08-27 |
EP2304085A1 (en) | 2011-04-06 |
BRPI0822295A2 (en) | 2019-09-24 |
TR201006816T1 (en) | 2010-12-21 |
CN101952494A (en) | 2011-01-19 |
DE102008010364A1 (en) | 2009-08-20 |
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