EP1136599B1 - Saw tooth wire - Google Patents

Saw tooth wire Download PDF

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Publication number
EP1136599B1
EP1136599B1 EP01106558A EP01106558A EP1136599B1 EP 1136599 B1 EP1136599 B1 EP 1136599B1 EP 01106558 A EP01106558 A EP 01106558A EP 01106558 A EP01106558 A EP 01106558A EP 1136599 B1 EP1136599 B1 EP 1136599B1
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EP
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Prior art keywords
tooth
wire
saw
teeth
convex
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EP01106558A
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German (de)
French (fr)
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EP1136599A1 (en
Inventor
Ralph A. Graf
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Graf und Cie AG
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Graf und Cie AG
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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01GPRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/84Card clothing; Manufacture thereof not otherwise provided for
    • D01G15/88Card clothing; Manufacture thereof not otherwise provided for formed from metal sheets or strips

Definitions

  • the invention relates to a sawtooth wire for production a sawtooth all-steel set for processing Textile fibers, in particular for the production of a sawtooth all-steel set for the customer of a carding machine with a plurality of one behind the other in the longitudinal direction of the wire arranged teeth, each one starting from a tooth base extending towards a tooth tip Toothbrush and one starting from the tip of the tooth towards tooth back extending to the following tooth base.
  • a carding machine is used in the manufacture of yarns for aligning and cleaning the textile fibers forming the yarns used.
  • a feed roller a so-called drum. Acting it is a roller-shaped element, which on its outer surface with a tick set or sawtooth all-steel set is provided and is rotated about the roller axis.
  • the Drum set together with over the surface of the Drumsticks arranged in the course of the Rotation of the spool aligns and cleans the feed Textile fibers.
  • the so obtained Nonwoven with the help of so-called pickup rollers from the Drum removed and sent for further processing.
  • the pickup rollers in the area of their lateral surface also a sawtooth all-steel set on the Course of the rotation of the take-off rollers in that of the drum entrained fiber fleece engages and this from the drum withdraws.
  • the saw teeth of the saw tooth all-steel sets of the take-off rollers to be provided with groove grooves on the side.
  • The can, for example, by a cold forming process in the course the wire production take place, whereby the saw teeth already provided with the grooved sheet sections of a wire are punched.
  • these grooved rolls is also made of natural fine-titer fibers and synthetic polymers have greater adhesion to the Tooth flank reached. This will transfer the nonwoven positively influenced by the reel on the take-off roller, that the transfer takes place faster and an otherwise possible filling of the drum set is avoided. Further it has been shown that these lateral grooves due to the greater adhesion of the fibers on the tooth flank an early release of the nonwoven from inhibit the take-off roller.
  • the present invention has for its object a sawtooth wire to provide the manufacture of a sawtooth all-steel set enables the purchaser of a carding machine, with the early solution of the nonwoven reliably can be avoided.
  • this task is achieved through further training the known sawtooth wires solved, which essentially is characterized in that the tooth back at least one of the teeth of the sawtooth wire at least one in the direction merging into a concave section on the tooth base has convex section.
  • concave section is used Section of the tooth back designated, its successive Points only through straight lines running outside the saw teeth can be connected to each other while by the Expression of convex section denotes such marginal courses the successive points of which are within the Straight lines of tooth flanks are connected to each other can.
  • this abutment is also thought of, this abutment to be provided by an indentation in the course of the tooth back, where a concave section between two convex Sections of the tooth back is arranged, it has proven to be proven particularly favorable if this abutment by a Projection or a cam in the area of the tooth back in which a vertex of the projection or the convex portion of the cam between two concaves Sections is arranged.
  • a particularly high retention force can be achieved if the back of the tooth preserves at least one of the teeth a number of successive in the course of the tooth back Indentations and / or projections or cams a plurality of each convex into a concave section Has sections.
  • both the concave section and the convex section in the form of polygons made of straight lines Edge sections can be provided, it has themselves with a view to obtaining a satisfactory Retention force while ensuring a gentle Intervention in the nonwoven fabric has proven to be particularly favorable, if the concave section and / or the convex section a curved course with a radius of curvature in Range from 0.05 to 0.4 mm, preferably 0.1 mm to 0.3 mm, particularly preferably has about 0.2 mm.
  • the invention Training the saw teeth with the known provision of grooved grooves combined in the area of the tooth flanks be, so that at least one approximately parallel to the longitudinal direction at least one tooth flank of the wire the teeth are profiled.
  • This profiling can at least one extending approximately in the longitudinal direction of the wire Profile groove and / or at least one approximately in the longitudinal direction of the wire extending profile web.
  • sawtooth wires made of textile fibers are manufactured that a starting material to a sheet section wire is formed and then saw teeth in the sheet section are punched.
  • Sawtooth wires can be punched through a tooth back with at least one of the saw teeth one towards the bottom of the tooth in a concave section transition convex section are formed. additionally can at least one flank of the leaf section deformation of the starting material, such as cold working, with a profile, such as at least one groove running parallel to the longitudinal direction of the wire and / or at least one parallel to the longitudinal direction of the wire extending web are provided.
  • the sawtooth wire 10 shown in Fig. 1a comprises a foot section 12 and a leaf section 14 less Width 14.
  • the total height H of this sawtooth wire is 4 mm.
  • In the sheet section 14 are a number of in the longitudinal direction of the wire teeth 20 arranged one behind the other are punched. Each of these teeth 20 has one starting from a tooth base 21 extending to a tooth tip 26 Toothed breast 22 and one starting from the tooth tip 26 tooth back 24 extending to the next tooth base 21 on.
  • the distance d between successive teeth is 1.96 mm.
  • the tooth incision depth h is 2.2 mm.
  • the term tooth base used above denotes the place of the deepest incision between successive Teeth 20.
  • the projection adjacent to the tooth tip 26 becomes 40 from a concave surface area 28, a convex Surface area 30 and another concave surface area 32, the concave surface area 28 towards the tooth base 21 in the convex surface area 30 passes, which in turn towards the Tooth base merges into the concave surface area 33, so that the convex surface area 30 between the concaves Surface areas 28 and 32 is arranged.
  • projection 40 provides an abutment for one of a corresponding sawtooth wire formed sawtooth all-steel clothing with textile fibers ready.
  • the second projection or cam 42 is from the concave Surface area 32, another convex surface area 34 and another concave surface area 36, with the concave surface area 32 in the direction on the tooth base 21 in the further convex surface area 34 passes, which in turn in the other concave Surface area 36 merges.
  • the Transition between the convex surface area 34 and the concave surface area 36 an abutment for one of corresponding sawtooth all-steel set with fibers represents.
  • the radius of curvature of the convex surface areas 30 and 34 is the concave Surface areas 28, 32 and 36 about 0.2 mm.
  • the distance a the apex of the first projection 40 from the tooth tip 26 is in the embodiment shown in the drawing of the invention 0.7 mm during the distance a1 between the The apex of the projections 40 and 42 is 0.53 mm. It has have shown that with these dimensions at the same time Ensuring a gentle intervention in a non-woven fabric a particularly high retention force can be provided.
  • the sawtooth wire shown in Fig. 2 corresponds to essential to the sawtooth wire already explained in FIG. 1. Therefore, to designate the individual parts this sawtooth wire uses the same reference numerals as to designate the individual parts of the shown in Fig. 1 Sawtooth wire. The only difference is in the area the tooth tips of the individual saw teeth 20 of this saw tooth wire recognizable.
  • the Radius of curvature R4 of the concave surface area 124 of FIG Toothbrush 22 is the one shown in the drawing Embodiment of the invention 1 mm, during the radius of curvature of the convex surface area 128 of the tooth back R3 Is 0.5 mm.
  • each tooth of the sawtooth wire is in the range of the tooth back with two projections or cams.
  • each tooth of the sawtooth wire is in the range of the tooth back with two projections or cams.
  • individual or all teeth have only one cam or more than two cams. Otherwise, the tooth flanks of the individual teeth also with profiles, such as profile grooves or profile bars be equipped to increase the fiber retention force increase.
  • the invention is also not based on the Drawing explained the exact dimensions of a sawtooth wire limited.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Flexible Shafts (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)

Abstract

The sawtooth wire, to be used as the doffer clothing at a carding machine, has at least one tooth with a tooth back in a series of alternating concave (32,36) and convex (30,34) surface sections towards the tooth root (21). At least one convex section (30,34) is between two concave sections (28,32,36). At least one of the convex surface sections (40,42), is at the upper end of the tooth back adjacent to the tooth point (26) in the upper one-half of the tooth, or particularly in the upper one-third and especially the upper one-quarter of the tooth back. At least one of the concave and/or convex sections has a curvature with a curve radius of 0.05-0.4 mm and preferably 0.1-0.3 mm and especially 0.2 mm. At least one tooth in the sawtooth wire has a front face (22) which transits to the tooth point in a concave surface section, while a convex surface section is at the tooth back into the point. At least one tooth flank, parallel to the longitudinal line of the wire, has at least one profiling for the tooth, as a profile groove and/or bar along the wire line. An independent claim is included for the production of a sawtooth wire by stamping, where the tooth back has a structure of alternating concave and convex surface sections towards the tooth root. Preferred Features: During the shaping of the start material, and especially by cold shaping with profiling, at least one groove is formed parallel to the wire line and/or at least one bar is along the wire line.

Description

Die Erfindung betrifft einen Sägezahndraht zur Herstellung einer Sägezahn-Ganzstahlgarnitur für die Verarbeitung von Textilfasern, insbesondere zur Herstellung einer Sägezahn-Ganzstahlgarnitur für den Abnehmer einer Krempelmaschine mit einer Mehrzahl von in Längsrichtung des Drahtes hintereinander angeordneten Zähnen, von denen jeder eine sich ausgehend von einem Zahngrund in Richtung auf eine Zahnspitze erstreckende Zahnbrust und einen sich ausgehend von der Zahnspitze in Richtung auf den folgenden Zahngrund erstreckenden Zahnrücken aufweist. The invention relates to a sawtooth wire for production a sawtooth all-steel set for processing Textile fibers, in particular for the production of a sawtooth all-steel set for the customer of a carding machine with a plurality of one behind the other in the longitudinal direction of the wire arranged teeth, each one starting from a tooth base extending towards a tooth tip Toothbrush and one starting from the tip of the tooth towards tooth back extending to the following tooth base.

Eine Krempelmaschine wird bei der Herstellung von Garnen zur Ausrichtung und Reinigung der die Garne bildenden Textilfasern eingesetzt. Dazu werden die Textilfasern mit Hilfe einer Zuführwalze einem sog. Tambour vorgelegt. Dabei handelt es sich um ein walzenförmiges Element, welches auf seiner Mantelfläche mit einer Häkchengarnitur oder Sägezahn-Ganzstahlgarnitur versehen ist und um die Walzenachse gedreht wird. Die Tambourgarnitur bewirkt zusammen mit über die Mantelfläche des Tambours verteilt angeordneten Deckelstäben im Verlauf der Drehung des Tambours eine Ausrichtung und Reinigung der zugeführten Textilfasern. Nach diesem Vorgang wird das damit erhaltene Faservlies mit Hilfe von sog. Abnehmerwalzen von dem Tambour entfernt und der weiteren Verarbeitung zugeführt. Üblicherweise weisen die Abnehmerwalzen im Bereich ihrer Mantelfläche ebenfalls eine Sägezahn-Ganzstahlgarnitur auf, die im Verlauf der Drehung der Abnehmerwalzen in das von dem Tambour mitgeführte Faservlies eingreift und dieses von dem Tambour abzieht.A carding machine is used in the manufacture of yarns for aligning and cleaning the textile fibers forming the yarns used. To do this, use the textile fibers submitted to a feed roller a so-called drum. Acting it is a roller-shaped element, which on its outer surface with a tick set or sawtooth all-steel set is provided and is rotated about the roller axis. The Drum set together with over the surface of the Drumsticks arranged in the course of the Rotation of the spool aligns and cleans the feed Textile fibers. After this process, the so obtained Nonwoven with the help of so-called pickup rollers from the Drum removed and sent for further processing. Usually point the pickup rollers in the area of their lateral surface also a sawtooth all-steel set on the Course of the rotation of the take-off rollers in that of the drum entrained fiber fleece engages and this from the drum withdraws.

Im besonderen bei der Bearbeitung besonders feintitriger Fasern aus natürlichen oder synthetischen Polymeren hat es sich gezeigt, daß die Übergabe des Faservlieses von dem Tambour auf die Abnehmerwalze Schwierigkeiten bereitet. Das führt zu einer Füllung der Tambourgarnitur mit nicht abgenommenem Fasermaterial, welche eine mangelhafte Ausrichtung und Reinigung der zugeführten Textilfasern mit dem Tambour zum Ergebnis hat.Especially when editing particularly fine titers It has fibers made from natural or synthetic polymers it has been shown that the transfer of the nonwoven from the drum Difficulties on the take-off roller. Leading to fill the drum set with not removed Fiber material, which is poor alignment and cleaning of the supplied textile fibers with the reel to the result Has.

Weiter hat es sich gezeigt, daß sich das von der Abnehmerwalze abgenommene Faservlies im besonderen bei höheren Produktionsgewichten frühzeitig von der Abnehmerwalze löst, was zu Problemen bei der Weiterverarbeitung des Fasermaterials führen kann. It has also been shown that this is from the take-off roller Removed nonwoven in particular with higher production weights early on from the take-off roller what problems with the further processing of the fiber material can lead.

Zur Behebung dieser Probleme wurde bereits vorgeschlagen, die Sägezähne der Sägezahn-Ganzstahlgarnituren der Abnehmerwalzen mit seitlichen Rilleneinwalzungen zu versehen. Das kann beispielsweise durch einen Kaltverformungsprozeß im Verlauf der Drahtherstellung erfolgen, wobei die Sägezähne aus bereits mit den Rilleneinwalzungen versehenen Blattabschnitten eines Drahtes gestanzt werden. Mit Hilfe dieser Rilleneinwalzungen wird auch bei besonders feintitrigen Fasern aus natürlichen und synthetischen Polymeren eine größere Haftung an der Zahnflanke erreicht. Dadurch wird die Übergabe des Faservlieses vom Tambour auf die Abnehmerwalze dahingehend positiv beeinflußt, daß die Übergabe schneller erfolgt und eine ansonsten mögliche Füllung der Tambourgarnitur vermieden wird. Weiter hat es sich gezeigt, daß diese seitlichen Rilleneinwalzungen aufgrund der damit erreichten größeren Haftung der Fasern an der Zahnflanke eine frühzeitige Lösung des Faservlieses von der Abnehmerwalze hemmen.To address these issues, it has already been suggested the saw teeth of the saw tooth all-steel sets of the take-off rollers to be provided with groove grooves on the side. The can, for example, by a cold forming process in the course the wire production take place, whereby the saw teeth already provided with the grooved sheet sections of a wire are punched. With the help of these grooved rolls is also made of natural fine-titer fibers and synthetic polymers have greater adhesion to the Tooth flank reached. This will transfer the nonwoven positively influenced by the reel on the take-off roller, that the transfer takes place faster and an otherwise possible filling of the drum set is avoided. Further it has been shown that these lateral grooves due to the greater adhesion of the fibers on the tooth flank an early release of the nonwoven from inhibit the take-off roller.

Es hat sich jedoch gezeigt, daß im besonderen bei Hochleistungskarden mit Produktionsleistungen von 80 kg oder mehr bei den damit erreichten hohen Umfangsgeschwindigkeiten des Abnehmers trotz der die Haltekraft fördernden Rilleneinwalzungen in den Zahnflanken eine frühzeitige Ablösung des Faservlieses von dem Abnehmer auftritt.However, it has been shown that in particular High performance cards with production capacities of 80 kg or more with the high peripheral speeds achieved with it of the customer in spite of the grooved grooves which promote the holding force early detachment of the nonwoven in the tooth flanks occurs by the customer.

Angesichts dieser Probleme im Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen Sägezahndraht bereitzustellen, der die Herstellung einer Sägezahn-Ganzstahlgarnitur für den Abnehmer einer Krempelmaschine ermöglicht, mit der eine frühzeitige Lösung des Faservlieses zuverlässig vermieden werden kann. Given these problems in the prior art the present invention has for its object a sawtooth wire to provide the manufacture of a sawtooth all-steel set enables the purchaser of a carding machine, with the early solution of the nonwoven reliably can be avoided.

Erfindungsgemäß wird diese Aufgabe durch eine Weiterbildung der bekannten Sägezahndrähte gelöst, die im wesentlichen dadurch gekennzeichnet ist, daß der Zahnrücken mindestens eines der Zähne des Sägezahndrahtes mindestens einen in Richtung auf den Zahngrund in einen konkaven Abschnitt übergehenden konvexen Abschnitt aufweist.According to the invention, this task is achieved through further training the known sawtooth wires solved, which essentially is characterized in that the tooth back at least one of the teeth of the sawtooth wire at least one in the direction merging into a concave section on the tooth base has convex section.

Dabei wird durch den Ausdruck "konkaver Abschnitt" ein Abschnitt des Zahnrückens bezeichnet, dessen aufeinanderfolgende Punkte nur durch außerhalb der Sägezähne verlaufende Geraden miteinander verbunden werden können, während durch den Ausdruck konvexer Abschnitt solche Randverläufe bezeichnet werden, deren aufeinanderfolgende Punkte durch innerhalb der Zahnflanken verlaufende Geraden miteinander verbunden werden können.The expression "concave section" is used Section of the tooth back designated, its successive Points only through straight lines running outside the saw teeth can be connected to each other while by the Expression of convex section denotes such marginal courses the successive points of which are within the Straight lines of tooth flanks are connected to each other can.

Bei den erfindungsgemäßen Sägezahndrähten wird durch den Übergang des konvexen Abschnittes in den konkaven Abschnitt im Bereich der Zahnrücken ein Widerlager für die von dem Abnehmer erfaßten Fasern bereitgestellt, mit dessen Hilfe eine frühzeitige Ablösung der Fasern zuverlässig verhindert werden kann, so daß auch bei hohen Produktionsgeschwindigkeiten ein störungsfreier Betrieb der Krempelmaschine ermöglicht wird.In the sawtooth wires according to the invention is by the Transition of the convex section into the concave section in the Area of the tooth back an abutment for that of the customer provided fibers provided, with the help of an early Detachment of the fibers can be reliably prevented so that even at high production speeds a trouble-free Operation of the carding machine is made possible.

Wenngleich auch daran gedacht ist, dieses Widerlager durch eine Einbuchtung im Verlauf des Zahnrückens bereitzustellen, bei der ein konkaver Abschnitt zwischen zwei konvexen Abschnitten des Zahnrückens angeordnet ist, hat es sich als besonders günstig erwiesen, wenn dieses Widerlager durch einen Vorsprung bzw. einen Nocken im Bereich des Zahnrückens hervorgebracht wird, bei dem ein einen Scheitel des Vorsprungs bzw. des Nockens bildender konvexer Abschnitt zwischen zwei konkaven Abschnitten angeordnet ist. Although it is also thought of, this abutment to be provided by an indentation in the course of the tooth back, where a concave section between two convex Sections of the tooth back is arranged, it has proven to be proven particularly favorable if this abutment by a Projection or a cam in the area of the tooth back in which a vertex of the projection or the convex portion of the cam between two concaves Sections is arranged.

Eine besonders hohe Rückhaltekraft kann erreicht werden, wenn der Zahnrücken mindestens eines der Zähne zum Erhalt einer Anzahl von im Verlauf des Zahnrückens aufeinanderfolgender Einbuchtungen und/oder Vorsprüngen bzw. Nocken eine Mehrzahl von jeweils in einen konkaven Abschnitt übergehenden konvexen Abschnitten aufweist.A particularly high retention force can be achieved if the back of the tooth preserves at least one of the teeth a number of successive in the course of the tooth back Indentations and / or projections or cams a plurality of each convex into a concave section Has sections.

Im Hinblick auf die Tatsache, daß die Sägezahn-Ganzstahlgarnituren des Abnehmers üblicherweise im Bereich der einzelnen Zahnspitzen in das in dem Tambour mitgeführte Faservlies eingreifen, hat es sich zum Erhalt einer ausreichenden Rückhaltekraft als besonders günstig erwiesen, wenn mindestens einer der konvexen Abschnitte in der an die Zahnspitze angrenzenden oberen Hälfte des Zahnrückens vorzugsweise im oberen Drittel, besonders bevorzugt im oberen Viertel des Zahnrückens angeordnet ist.In view of the fact that the sawtooth all-steel fittings of the customer usually in the area of individual tooth tips in the fiber fleece carried in the drum intervene, it has been sufficient to maintain Retention force proved to be particularly favorable if at least one of the convex sections in the to the tooth tip adjacent upper half of the tooth back preferably in upper third, particularly preferably in the upper quarter of the Tooth back is arranged.

Wenngleich sowohl der konkave Abschnitt als auch der konvexe Abschnitt in Form von Polygonzügen aus geradlinig verlaufenden Randabschnitten bereitgestellt werden kann, hat es sich im Hinblick auf den Erhalt einer zufriedenstellenden Rückhaltekraft unter gleichzeitiger Sicherstellung eines schonenden Eingriffs in das Faservlies als besonders günstig erwiesen, wenn der konkave Abschnitt und/oder der konvexe Abschnitt einen gekrümmten Verlauf mit einem Krümmungsradius im Bereich von 0,05 bis 0,4 mm, vorzugsweise 0,1 mm bis 0,3 mm, besonders bevorzugt etwa 0,2 mm aufweist.Although both the concave section and the convex section in the form of polygons made of straight lines Edge sections can be provided, it has themselves with a view to obtaining a satisfactory Retention force while ensuring a gentle Intervention in the nonwoven fabric has proven to be particularly favorable, if the concave section and / or the convex section a curved course with a radius of curvature in Range from 0.05 to 0.4 mm, preferably 0.1 mm to 0.3 mm, particularly preferably has about 0.2 mm.

Im Rahmen der Erfindung ist auch daran gedacht, nur einzelne Sägezähne, wie etwa nur jeden zweiten, dritten oder beliebig ausgewählte Sägezähne mit einem erfindungsgemäß ausgebildeten Zahnrücken auszustatten. Allerdings hat es sich als günstig erwiesen, wenn jeder Zahn des Sägezahndrahtes mindestens einen in Richtung auf den Zahngrund in einen konkaven Abschnitt übergehenden konvexen Abschnitt aufweist.Within the scope of the invention, only individual ones are also considered Saw teeth, such as only every second, third or any selected saw teeth with a trained according to the invention Equip tooth back. However, it turned out to be Proved to be favorable if every tooth of the sawtooth wire at least one towards the bottom of the tooth in a concave Section transitional convex section.

Bei erfindungsgemäßen Sägezahndrähten kann eine besonders ausgeprägte Zahnspitze der einzelnen Sägezähne sichergestellt werden, wenn bei mindestens einem der Zähne die Zahnbrust über einen konkaven Abschnitt in die Zahnspitze übergeht und der Zahnrücken im Anschluß an die Zahnspitze einen konvexen Abschnitt aufweist. Mit so ausgebildeten Sägezähnen erfolgt eine besonders zuverlässige Abnahme des Faservlieses von dem Tambour.In the case of sawtooth wires according to the invention, one can be special pronounced tooth tip of the individual saw teeth ensured if the teeth on at least one of the teeth passes over a concave section into the tooth tip and the tooth back following the tooth tip a convex Section. With saw teeth designed in this way a particularly reliable removal of the nonwoven from the drum.

Wenngleich durch die erfindungsgemäße Zahnform bereits eine besonders hohe Rückhaltekraft bereitgestellt werden kann, ist es in einigen Fällen, insbesondere bei der Hochleistungskardierung, erforderlich, eine weitere Erhöhung dieser Rückhaltekraft zu bewirken. In diesen Fällen kann die erfindungsgemäße Ausbildung der Sägezähne mit der bekannten Bereitstellung von Rilleneinwalzungen im Bereich der Zahnflanken kombiniert werden, so daß mindestens eine etwa parallel zur Längsrichtung des Drahtes verlaufende Zahnflanke mindestens eines der Zähne eine Profilierung aufweist. Diese Profilierung kann mindestens eine etwa in Längsrichtung des Drahtes verlaufende Profilrille und/oder mindestens einen etwa in Längsrichtung des Drahtes verlaufenden Profilsteg aufweisen.Already through the tooth shape according to the invention a particularly high retention force can be provided, in some cases, especially in high performance carding, required a further increase in this retention force to effect. In these cases, the invention Training the saw teeth with the known provision of grooved grooves combined in the area of the tooth flanks be, so that at least one approximately parallel to the longitudinal direction at least one tooth flank of the wire the teeth are profiled. This profiling can at least one extending approximately in the longitudinal direction of the wire Profile groove and / or at least one approximately in the longitudinal direction of the wire extending profile web.

Wie eingangs bereits erläutert, können zur Bearbeitung von Textilfasern gedachte Sägezahndrähte dadurch hergestellt werden, daß ein Ausgangsmaterial zu einem einen Blattabschnitt aufweisenden Draht geformt wird und anschließend Sägezähne in den Blattabschnitt gestanzt werden. Zur Herstellung erfindungsgemäßer Sägezahndrähte kann durch den Stanzvorgang bei mindestens einem der Sägezähne ein Zahnrücken mit mindestens einem in Richtung auf den Zahngrund in einem konkaven Abschnitt übergehenden konvexen Abschnitt gebildet werden. Zusätzlich kann mindestens eine Flanke des Blattabschnittes bei der Verformung des Ausgangsmaterials, wie etwa einer Kaltverformung, mit einer Profilierung, wie etwa mindestens einer parallel zur Längsrichtung des Drahtes verlaufenden Rille und/oder mindestens einem parallel zur Längsrichtung des Drahtes verlaufenden Steg versehen werden.As already explained at the beginning, you can edit sawtooth wires made of textile fibers are manufactured that a starting material to a sheet section wire is formed and then saw teeth in the sheet section are punched. For the production of the invention Sawtooth wires can be punched through a tooth back with at least one of the saw teeth one towards the bottom of the tooth in a concave section transition convex section are formed. additionally can at least one flank of the leaf section deformation of the starting material, such as cold working, with a profile, such as at least one groove running parallel to the longitudinal direction of the wire and / or at least one parallel to the longitudinal direction of the wire extending web are provided.

Nachstehend wird die Erfindung unter Bezugnahme auf die Zeichnung, auf die hinsichtlich aller erfindungswesentlichen und in der Beschreibung nicht näher herausgestellten Einzelheiten ausdrücklich verwiesen wird, erläutert. In der Zeichnung zeigt:

Fig. 1a
eine Seitenansicht eines Sägezahndrahtes gemäß einer ersten Ausführungsform der Erfindung,
Fig. 1b
eine Detaildarstellung eines Zahns des in Fig. 1a dargestellten Sägezahndrahtes,
Fig. 2a
eine Seitenansicht eines Sägezahndrahtes gemäß einer zweiten Ausführungsform der Erfindung und
Fig. 2b
eine Detaildarstellung eines Zahns des in Fig. 2a dargestellten Sägezahndrahtes.
The invention is explained below with reference to the drawing, to which reference is expressly made with regard to all details that are essential to the invention and are not detailed in the description. The drawing shows:
Fig. 1a
2 shows a side view of a sawtooth wire according to a first embodiment of the invention,
Fig. 1b
3 shows a detailed illustration of a tooth of the sawtooth wire shown in FIG. 1a,
Fig. 2a
a side view of a sawtooth wire according to a second embodiment of the invention and
Fig. 2b
a detailed view of a tooth of the sawtooth wire shown in Fig. 2a.

Der in Fig. 1a dargestellte Sägezahndraht 10 umfaßt einen Fußabschnitt 12 und einen Blattabschnitt 14 geringerer Breite 14. Die Gesamthöhe H dieses Sägezahndrahtes beträgt 4 mm. In den Blattabschnitt 14 sind eine Anzahl von in Längsrichtung des Drahtes hintereinander angeordnete Zähne 20 gestanzt. Jeder dieser Zähne 20 weist eine sich ausgehend von einem Zahngrund 21 bis zu einer Zahnspitze 26 erstreckende Zahnbrust 22 sowie einen sich ausgehend von der Zahnspitze 26 bis zu dem nächsten Zahngrund 21 erstreckenden Zahnrücken 24 auf. Der Abstand d zwischen aufeinanderfolgenden Zähnen beträgt 1,96 mm. Die Zahneinschnittiefe h beträgt 2,2 mm. Der vorstehend benutzte Ausdruck Zahngrund bezeichnet die Stelle des tiefsten Zahneinschnittes zwischen aufeinanderfolgenden Zähnen 20.The sawtooth wire 10 shown in Fig. 1a comprises a foot section 12 and a leaf section 14 less Width 14. The total height H of this sawtooth wire is 4 mm. In the sheet section 14 are a number of in the longitudinal direction of the wire teeth 20 arranged one behind the other are punched. Each of these teeth 20 has one starting from a tooth base 21 extending to a tooth tip 26 Toothed breast 22 and one starting from the tooth tip 26 tooth back 24 extending to the next tooth base 21 on. The distance d between successive teeth is 1.96 mm. The tooth incision depth h is 2.2 mm. The The term tooth base used above denotes the place of the deepest incision between successive Teeth 20.

Bei dem in der Zeichnung dargestellten Sägezahndraht 10 beträgt der Brustwinkel α 30° und der Rückenwinkel β 48°. Wie aus Fig. 1a hervorgeht, weist der Zahnrücken 24 jedes Zahns 20 des Sägezahndrahtes 10 zwei Vorsprünge oder Nocken 40 bzw. 42 auf, die in der an die Zahnspitze 26 angrenzenden oberen Hälfte des Zahnrückens 24 angeordnet sind. Die Form dieser Vorsprünge 40 und 42 ist in Fig. 1b im einzelnen dargestellt.In the sawtooth wire 10 shown in the drawing the chest angle α is 30 ° and the back angle β 48 °. How 1a shows, the tooth back 24 of each tooth 20 of the sawtooth wire 10 two projections or cams 40 and 42 on the in the upper adjacent to the tooth tip 26 Half of the tooth back 24 are arranged. The shape of this Projections 40 and 42 are shown in detail in Fig. 1b.

Danach wird der der Zahnspitze 26 benachbarte Vorsprung 40 von einem konkaven Oberflächenbereich 28, einem konvexen Oberflächenbereich 30 und einem weiteren konkaven Oberflächenbereich 32 begrenzt, wobei der konkave Oberflächenbereich 28 in Richtung auf den Zahngrund 21 in den konvexen Oberflächenbereich 30 übergeht, welcher wiederum in Richtung auf den Zahngrund in den konkaven Oberflächenbereich 33 übergeht, so daß der konvexe Oberflächenbereich 30 zwischen den konkaven Oberflächenbereichen 28 und 32 angeordnet ist. Im Bereich des Überganges zwischen dem konvexen Oberflächenbereich 30 und dem konkaven Oberflächenbereich 32 stellt der Vorsprung 40 ein Widerlager für von einer aus einem entsprechendem Sägezahndraht gebildeten Sägezahn-Ganzstahlgarnitur mitgeführten Textilfasern bereit.Then the projection adjacent to the tooth tip 26 becomes 40 from a concave surface area 28, a convex Surface area 30 and another concave surface area 32, the concave surface area 28 towards the tooth base 21 in the convex surface area 30 passes, which in turn towards the Tooth base merges into the concave surface area 33, so that the convex surface area 30 between the concaves Surface areas 28 and 32 is arranged. In the area of Transition between the convex surface area 30 and the concave surface area 32, projection 40 provides an abutment for one of a corresponding sawtooth wire formed sawtooth all-steel clothing with textile fibers ready.

Der zweite Vorsprung bzw. Nocken 42 wird von dem konkaven Oberflächenbereich 32, einem weiteren konvexen Oberflächenbereich 34 und einem weiteren konkaven Oberflächenbereich 36 begrenzt, wobei der konkave Oberflächenbereich 32 in Richtung auf den Zahngrund 21 in den weiteren konvexen Oberflächenbereich 34 übergeht, welcher wiederum in den weiteren konkaven Oberflächenbereich 36 übergeht. Auch hier stellt der Übergang zwischen dem konvexen Oberflächenbereich 34 und dem konkaven Oberflächenbereich 36 ein Widerlager für von einer entsprechenden Sägezahn-Ganzstahlgarnitur mitgeführte Fasern dar.The second projection or cam 42 is from the concave Surface area 32, another convex surface area 34 and another concave surface area 36, with the concave surface area 32 in the direction on the tooth base 21 in the further convex surface area 34 passes, which in turn in the other concave Surface area 36 merges. Here too the Transition between the convex surface area 34 and the concave surface area 36 an abutment for one of corresponding sawtooth all-steel set with fibers represents.

Der Krümmungsradius der konvexen Oberflächenbereiche 30 und 34 beträgt ebenso wie der Krümmungsradius der konkaven Oberflächenbereiche 28, 32 und 36 etwa 0,2 mm. Der Abstand a des Scheitels des ersten Vorsprungs 40 von der Zahnspitze 26 beträgt bei der in der Zeichnung dargestellten Ausführungsform der Erfindung 0,7 mm während der Abstand a1 zwischen den Scheiteln der Vorsprünge 40 und 42 0,53 mm beträgt. Es hat sich gezeigt, daß mit diesen Abmessungen unter gleichzeitiger Sicherstellung eines schonenden Eingriffs in ein Faservlies eine besonders hohe Rückhaltekraft bereitgestellt werden kann.The radius of curvature of the convex surface areas 30 and 34, like the radius of curvature, is the concave Surface areas 28, 32 and 36 about 0.2 mm. The distance a the apex of the first projection 40 from the tooth tip 26 is in the embodiment shown in the drawing of the invention 0.7 mm during the distance a1 between the The apex of the projections 40 and 42 is 0.53 mm. It has have shown that with these dimensions at the same time Ensuring a gentle intervention in a non-woven fabric a particularly high retention force can be provided.

Der in Fig. 2 dargestellte Sägezahndraht entspricht im wesentlichen dem anhand dem in Fig. 1 bereits erläuterten Sägezahndraht. Daher werden zur Bezeichnung der einzelnen Teile dieses Sägezahndrahtes dieselben Bezugszeichen verwendet wie zur Bezeichnung der einzelnen Teile des in Fig. 1 dargestellten Sägezahndrahtes. Ein Unterschied ist lediglich im Bereich der Zahnspitzen der einzelnen Sägezähne 20 dieses Sägezahndrahtes erkennbar. Dabei sind die Zahnspitzen 126 des in Fig. 2 dargestellten Sägezahndrahtes dadurch deutlicher ausgeprägt, daß die Zahnbrust 22 über einen konkaven Abschnitt 124 in die Zahnspitze 126 übergeht, während der Zahnrücken im Anschluß an die Zahnspitze einen konvexen Abschnitt 128 aufweist. Der Krümmungsradius R4 des konkaven Oberflächenbereichs 124 der Zahnbrust 22 beträgt bei der in der Zeichnung dargestellten Ausführungsform der Erfindung 1 mm, während der Krümmungsradius des konvexen Oberflächenbereichs 128 des Zahnrückens R3 0,5 mm beträgt.The sawtooth wire shown in Fig. 2 corresponds to essential to the sawtooth wire already explained in FIG. 1. Therefore, to designate the individual parts this sawtooth wire uses the same reference numerals as to designate the individual parts of the shown in Fig. 1 Sawtooth wire. The only difference is in the area the tooth tips of the individual saw teeth 20 of this saw tooth wire recognizable. The tooth tips 126 of the 2 sawtooth wire shown more clearly, that the tooth face 22 via a concave section 124 in the Tooth tip 126 merges while the tooth back follows the tooth tip has a convex portion 128. The Radius of curvature R4 of the concave surface area 124 of FIG Toothbrush 22 is the one shown in the drawing Embodiment of the invention 1 mm, during the radius of curvature of the convex surface area 128 of the tooth back R3 Is 0.5 mm.

Bei der in der Zeichnung dargestellten Ausführungsform der Erfindung ist jeder Zahn des Sägezahndrahtes im Bereich des Zahnrückens mit zwei Vorsprüngen bzw. Nocken ausgestattet. Daneben ist jedoch auch an den Einsatz solcher Ausführungsformen gedacht, bei denen nur jeder zweite, dritte oder x-beliebige Zahn mit entsprechenden Nocken ausgestattet ist. Ferner ist auch an Ausführungsformen gedacht, bei denen einzelne oder alle Zähne nur einen Nocken oder mehr als zwei Nocken aufweisen. Im übrigen können die Zahnflanken der einzelnen Zähne auch noch mit Profilierungen, wie etwa Profilrillen oder Profilstegen ausgestattet sein, um die Faserrückhaltekraft zu steigern. Auch ist die Erfindung nicht auf die anhand der Zeichnung erläuterten genauen Abmessungen eines Sägezahndrahtes beschränkt. Entscheidend ist vielmehr, daß mindestens einer der Sägezähne im Bereich seines Zahnrückens mindestens einen in einen konkaven Oberflächenbereich übergehenden konvexen Oberflächenbereich aufweist, der ein Widerlager für die von den Zähnen mitzuführenden Fasern bildet. Dabei kann dieses Widerlager nicht nur, wie bei den in der Zeichnung dargestellten besonders bevorzugten Ausführungsformen der Erfindung in Form eines Vorsprungs oder Nockens gebildet sein, sondern auch in Form einer Einbuchtung im Bereich der Zahnrücken.In the embodiment shown in the drawing of the invention, each tooth of the sawtooth wire is in the range of the tooth back with two projections or cams. In addition, however, is also the use of such embodiments thought, where only every second, third or x-any Tooth is equipped with appropriate cams. Further is also thought of embodiments in which individual or all teeth have only one cam or more than two cams. Otherwise, the tooth flanks of the individual teeth also with profiles, such as profile grooves or profile bars be equipped to increase the fiber retention force increase. The invention is also not based on the Drawing explained the exact dimensions of a sawtooth wire limited. Rather, it is crucial that at least at least one of the saw teeth in the area of his tooth back a convex transition into a concave surface area Surface area that has an abutment for the forms fibers to be carried by the teeth. This can Abutments not only, as in the case of those shown in the drawing particularly preferred embodiments of the invention in Form a projection or cam, but also in the form of an indentation in the area of the tooth back.

Claims (12)

  1. A saw-tooth wire (10) for producing a saw-tooth full-steel clothing for processing textile fibres, more particularly for producing a saw-tooth full-steel clothing for the doffer of a carding machine, comprising a plurality of teeth (20) arranged one behind the other in the longitudinal direction of the wire (10), each of which has a tooth face starting from a tooth base (21 ) extending towards a tooth tip (26, 126) and a tooth back (24) starting from the tooth tip (26, 126) extending towards the following tooth base (21), characterised in that the tooth back (24) of at least one of the teeth (20) has at least one convex portion (30, 34) merging towards the tooth base (21) into a concave portion (32, 36).
  2. A saw-tooth wire according to Claim 1, characterised in that at least one of the convex portions (30, 34) is arranged between two concave portions (28, 32, 36).
  3. A saw-tooth wire according to Claim 1 or 2, characterised in that the tooth back (24) of at least one of the teeth (20) has a plurality of convex portions (30, 34), each merging into a concave portion (32, 36).
  4. A saw-tooth wire according to one of the preceding claims, characterised in that at least one of the convex portions (40, 42) is arranged in the upper half of the tooth back (24) adjoining the tooth tip (26, 126), preferably in the upper third, particularly preferably in the upper quarter of the tooth back (24).
  5. A saw-tooth wire according to one of the preceding claims, characterised in that at least one of the concave and/or convex portions (28, 30, 32, 34, 36) has a curved shape with a radius of curvature within the range of 0.05 to 0.4 mm, preferably 0.1 to 0.3 mm, particularly preferably about 0.2 mm.
  6. A saw-tooth wire according to one of the preceding claims, characterised in that each tooth (20) of the saw-tooth wire (10) has at least one convex portion (30, 34) merging towards the tooth base (21) into a concave portion (32, 36).
  7. A saw-tooth wire according to one of the preceding claims, characterised in that on at least one of the teeth (20) the tooth face (22) merges by way of a concave portion (124) into the tooth tip (126), and the tooth back has a convex portion (128) at the junction with the tooth tip (126).
  8. A saw-tooth wire according to one of the preceding claims, characterised in that at least one tooth profile of at least one of the teeth, extending approximately parallel to the longitudinal direction of the wire, is provided with shaping.
  9. A saw-tooth wire according to Claim 8, characterised in that the shaping has at least one shaped groove extending approximately in the longitudinal direction of the wire and/or at least one shaped bar extending approximately in the longitudinal direction of the wire.
  10. A doffer for a carding machine comprising a saw-tooth full-steel clothing produced using a saw-tooth wire according to one of the preceding claims.
  11. A method for producing a saw-tooth wire according to one of Claims 1 to 9, in which a starting material is shaped into a wire having a blade portion, and saw teeth are then stamped into the blade portion, characterised in that on at least one of the saw-teeth a tooth back is formed through the stamping operation comprising at least one convex portion merging towards the tooth base into a concave portion.
  12. A method according to Claim 11, characterised in that during the forming, more particularly the cold-forming, of the starting material, at least one profile of the blade portion is provided with shaping, such as at least one groove extending parallel to the longitudinal direction of the wire and/or at least one bar extending parallel to the longitudinal direction of the wire.
EP01106558A 2000-03-15 2001-03-15 Saw tooth wire Expired - Lifetime EP1136599B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10012561A DE10012561B4 (en) 2000-03-15 2000-03-15 sawtooth
DE10012561 2000-03-15

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EP1136599A1 EP1136599A1 (en) 2001-09-26
EP1136599B1 true EP1136599B1 (en) 2003-11-26

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ID=7634780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01106558A Expired - Lifetime EP1136599B1 (en) 2000-03-15 2001-03-15 Saw tooth wire

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US (1) US6523226B2 (en)
EP (1) EP1136599B1 (en)
JP (1) JP2001316947A (en)
CN (1) CN1254570C (en)
AT (1) ATE255181T1 (en)
AU (1) AU760739B2 (en)
BR (1) BR0100983B1 (en)
CA (1) CA2340618A1 (en)
DE (2) DE10012561B4 (en)
ES (1) ES2206362T3 (en)
PT (1) PT1136599E (en)
TR (1) TR200302375T4 (en)
TW (1) TW500847B (en)

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DE10108140A1 (en) * 2001-02-20 2002-08-29 Rieter Ag Maschf Taker-in on card has card wire clothing with saw-tooth shaped teeth having a clear height of 1.5 to 2.5 mm
FR2821863B1 (en) * 2001-03-08 2004-01-02 Ecc Platt Sa CARD LINING, ESPECIALLY FOR A COMBINING CYLINDER, WORKING CYLINDER OR CONDENSER CYLINDER
DE10114108B4 (en) * 2001-03-22 2005-05-19 Hollingsworth Gmbh Sawtooth wire for a roller set
DE10247215B4 (en) * 2002-10-10 2008-07-24 Graf + Cie Ag sawtooth
US7259674B2 (en) * 2004-12-22 2007-08-21 Alpha Security Products, Inc. Bottle security device
EP1917387A1 (en) * 2005-08-24 2008-05-07 Maschinen Fabrik Rieter AG Sawtooth wire
DE102007062841A1 (en) * 2007-12-21 2009-06-25 TRüTZSCHLER GMBH & CO. KG Sawtooth all-steel set for rolls and / or drums of carding or carding
WO2012019841A1 (en) * 2010-08-09 2012-02-16 Nv Bekaert Sa Wire profile for card clothing
CH704774A1 (en) 2011-04-08 2012-10-15 Graf & Co Ag Sawtooth.
CN102242422B (en) * 2011-06-18 2015-05-13 孙鹏子 High-density cotton carding metallic card clothing
WO2013037711A1 (en) 2011-09-15 2013-03-21 Nv Bekaert Sa Card wire with improved tooth shape
JP6117230B2 (en) * 2011-11-15 2017-04-19 グローツ−ベッカート コマンディトゲゼルシャフト Metal card wire
WO2013124142A1 (en) * 2012-02-20 2013-08-29 Nv Bekaert Sa Metal fibre web based filter
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US10760189B2 (en) * 2016-04-22 2020-09-01 General Recycled Protective fabric and process of manufacturing same

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BR0100983A (en) 2001-10-30
CA2340618A1 (en) 2001-09-15
AU2798401A (en) 2001-09-20
CN1317603A (en) 2001-10-17
PT1136599E (en) 2004-04-30
EP1136599A1 (en) 2001-09-26
TR200302375T4 (en) 2004-02-23
US20010037541A1 (en) 2001-11-08
ATE255181T1 (en) 2003-12-15
US6523226B2 (en) 2003-02-25
DE10012561A1 (en) 2001-10-04
ES2206362T3 (en) 2004-05-16
JP2001316947A (en) 2001-11-16
CN1254570C (en) 2006-05-03
DE10012561B4 (en) 2004-09-02
DE50101011D1 (en) 2004-01-08
TW500847B (en) 2002-09-01
AU760739B2 (en) 2003-05-22
BR0100983B1 (en) 2010-12-14

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