EP1040068B1 - Fadenspeicher - Google Patents
Fadenspeicher Download PDFInfo
- Publication number
- EP1040068B1 EP1040068B1 EP98966264A EP98966264A EP1040068B1 EP 1040068 B1 EP1040068 B1 EP 1040068B1 EP 98966264 A EP98966264 A EP 98966264A EP 98966264 A EP98966264 A EP 98966264A EP 1040068 B1 EP1040068 B1 EP 1040068B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- thread
- carrier body
- storage according
- section
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/34—Handling the weft between bulk storage and weft-inserting means
- D03D47/36—Measuring and cutting the weft
- D03D47/361—Drum-type weft feeding devices
- D03D47/364—Yarn braking means acting on the drum
- D03D47/366—Conical
Definitions
- the invention relates to a thread store with an essentially cylindrical Storage drum for receiving a storage supply in the form thereon extensively Filed thread turns, which are overhead through a face in front of the storage drum seated pull-off eyelet are removable with a thread brake device according to Generic term of claim 1.
- a generic thread store is from European patent application 0 534 263 known.
- the braking device has a rounded end edge section the storage drum spring-biased carrier body.
- This carrier body is funnel-shaped and made of a flexible material. In the wide
- the support body is covered with a flexurally flexible metal.
- This Metal covering lies on the rounded edge section on a circular Contact line on.
- a thread between the rounded edge and the metal coating of the support body is pulled through, is due to the spring loading braked.
- the thread is in the area of the contact line punctiform. Due to the thickness of the thread is the metal coating in it Area forming a crescent-shaped gap from the front edge portion lifted. When the thread is pulled off, it moves crescent-shaped Gap around the end edge portion so that the carrier body wobbles carries out and slightly in the area of the linear system the edge section slides up and down.
- a thread store with a thread take-off brake is known, at which is a narrow, funnel-shaped metal strip on a truncated cone Edge section of a storage drum rests.
- the metal strip is by means of a Foam padding with a thickness that corresponds to about half the width of the strip, loaded against the front edge portions.
- the foam ring is in a bell-shaped, rigid plastic carrier held.
- the invention is based, a generic thread store the task to further develop with the braking device that the thread tension increase towards higher take-off speeds (50 m / s) is further reduced.
- the front edge section has the shape of a truncated cone. On this front edge section the metal strip lies flat over at least some areas. The one in one acute angle entering the gap between the metal strip and the front edge section Thread is in the gap surface on an arcuate thread section struck by the metal strip against the front edge portion.
- the metal coating is not immediately inside on the flexible funnel-shaped carrier body is arranged, but with the interposition of a thin, elastically compressible material such as foam.
- the metal strip can be designed with a finely adjustable pressure force press on the frustoconical front edge of the storage drum.
- This liner allows the radial component to be adjusted to the arc section of the thread acting pressure force, which is smaller than that of the mass of the arc section at maximum thread take-off speed (50 m / s) on the metal strip acting centrifugal force.
- the speed curve is when pulling the thread not uniform, but in the form of two on top of each other following upside-down parabolas. The first hook accelerates the thread end and then brakes it again. The thread end comes about in the middle of the compartment to rest where it is taken over by the second gripper. It will then accelerate further and slowed down again. This means that the centrifugal force is never constant is, but increases for example with increasing thread take-off speed.
- the thread tension would increase further without further measures.
- Foam on the inner wall of a flexible, funnel-shaped carrier body are the pressure force and the dynamic relevant parameters of the thread braking device, such as mass, compression elasticity of the foam layer, bending flexibility of metal strips and carrier body, so coordinated that the distance between the loaded section of the thread and one in the direction of movement of the thread, the back peeling line of the metal strip from the front edge with increasing Thread take-off speed reaches the circumferential length.
- the dynamic parameters of the thread brake can be selected so that the Crescent-shaped gap extends to the circumferential length.
- the one acting on the arch section of the thread Contact force reached at a lower speed from the centrifugal force than that Speed that is necessary to reduce the gap length to the circumferential length bring.
- the material thickness for such an operation the foam layer must be as thin as possible.
- the material thickness should be a maximum of 3 mm, preferably 2 mm. It is also essential that both Metal strips, as well as the support body are flexible.
- the frustoconical base region Front edge section of the storage drum with a small gap distance of is surrounded by a ring.
- the funnel-shaped carrier can be the gap between the drum wall and the inner ring wall overtop.
- the funnel-shaped carrier body is advantageously on its smallest diameter end section resiliently attached to the support ring.
- the Springs with which the smallest diameter end section of the carrier body on the Bracket is attached, extend transversely to the drum axis in the unloaded state.
- the resonance frequency of the strip is lower than the thread circulation frequency at maximum thread take-off speed.
- the thickness of the liner is said to be in particular, be dimensioned so thin that the carrier body is radial when the thread is drawn off slightly with evasions.
- the device according to the invention has a storage drum 6.
- the storage drum 6 has a substantially cylindrical storage body, on which in thread turns are stored in a known manner.
- the thread is through a central thread take-off eyelet 7 pulled off overhead.
- the front edge portion 5 of the storage drum 6 has a frustoconical surface.
- the frustoconical surface merges into the cylindrical surface 6 via a curve.
- On the frustoconical A thin, flexible metal strip 3 sits on the end face 5.
- the thread 4 is in the form of an arcuate section 4 'between that on its inside polished metal strip 3 and the edge portion 5 clamped.
- a foam pad 2 is provided between the metal strip 2 and a funnel-shaped carrier body 1, which like a speaker membrane can be designed.
- the foam layer 2 is very thin. Their thickness should be less than 3 mm.
- the thread is clamped in a gap on an arcuate section 4 '.
- the gap is formed on the one hand by the edge 3 'of the strip 3 and on the other hand through the apex 3 "of the inlet gusset.
- the edge 3" 'of the Strip 3 protrudes beyond the maximum circumference of the storage drum and towers over it a narrow gap between the circumference of the cylindrical portion of the Storage drum 6 and a ring 12 surrounding it.
- the ring 12 is located in the immediate vicinity of the inlet gusset.
- the funnel-shaped support body 1 which is made of flexible material, is with its narrow end connected to a mounting ring 11 which over Tension springs 10 is connected to an axially adjustable ring 9.
- the string 4 runs tangentially from the truncated cone surface 5.
- the opening angle of the funnel 1 is preferably 90 °, so that the radial component the pressing force acting on the arc section 4 'is the same as that axial component.
- the device works as follows: If the thread is low Withdrawal speed subtracted from the drum, so an arc section orbits 4 'the front edge portion 5 of the storage drum. According to the thickness of the thread a crescent-shaped gap is formed between the metal strip 3 and the front edge section 5 from which to the front through the transfer line B0 and to the rear is limited by the peel line B1. When the thread is withdrawn, it runs from the Thread formed bulge or shaft around. When the thread take-off speed increases increases the one acting on the arcuate thread section 4 ' Centrifugal force, so that the mass of this arc section 4 'with a certain force pushes outwards, which is less than the pressure force.
- the inventive thread brake two acting in the radial direction Has spring elements, namely the funnel-shaped carrier body 1 on the one hand the head of the storage drum holding springs 10 and on the other hand the thin Foam intermediate layer 2.
- Both spring elements 10, 2 are with the masses and the flexurally elastic properties of the carrier body 1 and metal strip 3 are matched in such a way that up to the maximum take-off speed of 50 m / s or possibly more the smallest possible increase in the thread take-up tension occurs.
- Fig. 9 the gap formation is shown by means of lines of the same gap height. The history the lines were calculated numerically. It is striking that the gap height in the area of the thread outlet side edge 3 'at the point marked with the reference number 16 and at the opposite edge 3 "'at the point marked with 17 has the greatest height. Between the thread entry point 17 and the thread exit point 16 forms a saddle 18.
- the foam-lined narrow, otherwise Stripes lying flat on the shape of the cone shell developed according to that in their Effect of free centrifugal forces on the curved line section of the trapped Fadens different gap height.
Description
- Fig. 1
- eine teilweise geschnittene Seitenansicht des Stimbereichs eines Fadenspeichers mit aufgesetzter Fadenbremse bei Vorspannung Null.
- Fig. 2
- eine vergrößerte Darstellung des Bereiches II aus Fig. 1,
- Fig. 3
- eine teilweise aufgebrochene Draufsicht auf eine Vorrichtung gemäß Fig. 1,
- Fig. 4
- eine schematische Darstellung der auf den Faden wirkenden Normalkräfte,
- Fig. 5
- eine vergrößerte schematische Darstellung des bogenlinienförmigen Fadenabschnittes zwischen Metallstreifen und Stirnrandabschnitt,
- Fig. 6
- eine perspektivische Darstellung teilweise aufgebrochen des Ausführungsbeispiels,
- Fig. 7
- eine schematische Draufsicht auf den Metallstreifen aufliegend auf dem Stirnrandabschnitt bei verschiedenen Abzugsgeschwindigkeiten,
- Fig. 8
- eine rein schematische graphische Darstellung des Fadenspannungsverlaufes gegenüber der Fadenabzugsgeschwindigkeit, und
- Fig. 9
- die Darstellung einer mit einer Modellrechnung ermittelten Spaltausbildung mittels Linien gleicher Spalthöhe.
Claims (11)
- Fadenspeicher mit einer im wesentlichen zylindrischen Speichertrommel (6) zur Aufnahme eines Speichervorrates in Form darauf umfänglich abgelegter Fadenwindungen, die überkopf durch eine stirnseitig vor der Speichertrommel sitzende Abzugsöse (7) abziehbar sind, mit einer Fadenbremsvorrichtung aufweisend ein gegen einen Stirnrandabschnitt (5) der Speichertrommel (6) federvorgespannten, trichterförmigen Trägerkörper (1), mit einer in der weiten Trichteröffnung angeordneten, biegeflexiblen Metallbelegung (3), welche auf dem Stirnrandabschnitt aufliegt, so dass der Faden (4) durch einen sich zufolge der Fadendicke zwischen Stirnrandabschnitt (5) und Metallbelegung (3) ausbildenden Spalt reibungsgehemmt hindurchziehbar ist, wobei die Metallbelegung (3) mittels einer dünnen Zwischenlage (2) aus elastisch komprimierbarem Material am Trägerkörper (1) befestigt ist, und der Stirnrandabschnitt (5) die Form eines Kegelstumpfes besitzt, auf welchem ein die Metallbefegung (3) ausbildender Metallstreifen zumindest bereichsweise derart flächig aufliegt, dass der in einem spitzen Winkel in den Spalt zwischen Metallstreifen und Stirnrandabschnitt einlaufende Faden in der Spaltfläche auf einem bogenlinienförmig verlaufenden Fadenabschnitt (4') vom Metallstreifen gegen den Stirnrandabschnitt (5) beaufschiagt ist, dadurch gekennzeichnet, dass der Trägerkörper (1) aus biegeflexiblem Material besteht.
- Fadenspeicher nach Anspruch 1, dadurch gekennzeichnet, dass die Materialstärke eine die Zwischenlage (2) ausbildenden Schaumstofflage zwischen Metallstreifen und Trägerkörper (1) maximal 3 mm, vorzugsweise maximal 2 mm beträgt.
- Fadenspeicher nach Anspruch 1, gekennzeichnet durch einen im Basisbereich des kegelstumpfförmigen Stirnrandabschnittes (5) die Speichertrommel mit geringem Spaltabstand umgebenden, stationären Ring (12).
- Fadenspeicher nach Anspruch 3, dadurch gekennzeichnet, dass der Innendurchmesser des Ringes (12) geringer ist als der Basisdurchmesser des Metallstreifens .
- Fadenspeicher nach Anspruch 1, dadurch gekennzeichnet, dass der trichterförmige Trägerkörper (1) an seinem durchmessergeringsten Endabschnitt federnd an einem Tragring (9) befestigt ist.
- Fadenspeicher nach Anspruch 5, dadurch gekennzeichnet, dass Federn (10), mit welchen der durchmessergeringste Endabschnitt (11) des Trägerkörpers (1) am Haltering (9) befestigt ist, sich im unbelasteten Zustand quer zur Trommelachse erstrecken.
- Fadenspeicher nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die niedrigste aus der Resonanzfrequenz resultierende Abhebefrequenz der Fadenbremsvorrichtung geringer ist als die Fadenumlauffrequenz bei maximaler Fadenabzugsgeschwindigkeit (50 m/s).
- Fadenspeicher nach Anspruch 1, dadurch gekennzeichnet, dass die Stärke der Zwischenlage (2) so dünn bemessen ist, dass der Trägerkörper (1) beim Fadenabzug geringfügig radial mitausweicht.
- Fadenspeicher nach Anspruch 1, dadurch gekennzeichnet, dass der kegelstumpfförmige Stirnrandbereich (5) einen Winkel von etwa 45° zu seiner Kegelachse einnimmt.
- Fadenspeicher nach Anspruch 1, dadurch gekennzeichnet, dass die Fadenabzugsöse (7) im Spitzenbereich des Kegels des Stirnrandabschnittes (5) liegt.
- Fadenspeicher nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kombination des biegeflexiblen Trägerkörpers (1) mit der Zwischenlage (2) unter dem Metallstreifen mit steigender Fadenabzugsgeschwindigkeit einen ersten fliehkraftbedingten Kompensationsbereich und einen sich unmittelbar anschließenden resonanzbedingten Kompensationsbereich für die Fadenspannung aufweist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29721718U | 1997-12-09 | ||
DE29721718U DE29721718U1 (de) | 1997-12-09 | 1997-12-09 | Fadenspeicher |
PCT/EP1998/007991 WO1999029608A1 (de) | 1997-12-09 | 1998-12-09 | Fadenspeicher |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1040068A1 EP1040068A1 (de) | 2000-10-04 |
EP1040068B1 true EP1040068B1 (de) | 2002-06-26 |
Family
ID=8049683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98966264A Expired - Lifetime EP1040068B1 (de) | 1997-12-09 | 1998-12-09 | Fadenspeicher |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1040068B1 (de) |
DE (2) | DE29721718U1 (de) |
WO (1) | WO1999029608A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1320497B1 (it) * | 2000-06-02 | 2003-12-10 | Lgl Electronics Spa | Perfezionamento al mezzo frenante dei dispositivi di frenaturaautoregolante del filato, per apparecchi alimentatori di trama. |
CN102776665A (zh) * | 2012-07-26 | 2012-11-14 | 西安康本材料有限公司 | 一种碳纤维织布放纬装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69223575T2 (de) * | 1991-09-20 | 1998-04-16 | Lgl Electronics Spa | Selbstregulierende Fadenbremse für eine Schussfadenliefervorrichtung |
DE9406102U1 (de) * | 1994-04-13 | 1995-08-10 | Sobrevin | Fadenspeicher mit Fadenabzugsbremse |
DE4415331A1 (de) * | 1994-05-02 | 1995-11-09 | Sobrevin | Fadenspeichervorrichtung mit einstellbarem Fadenabzugswiderstand |
-
1997
- 1997-12-09 DE DE29721718U patent/DE29721718U1/de not_active Expired - Lifetime
-
1998
- 1998-12-09 WO PCT/EP1998/007991 patent/WO1999029608A1/de active IP Right Grant
- 1998-12-09 DE DE59804608T patent/DE59804608D1/de not_active Expired - Fee Related
- 1998-12-09 EP EP98966264A patent/EP1040068B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO1999029608A1 (de) | 1999-06-17 |
DE59804608D1 (de) | 2002-08-01 |
EP1040068A1 (de) | 2000-10-04 |
DE29721718U1 (de) | 1999-04-08 |
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