EP0417614B1 - Appareil pour comprimer continuellement ou pour contrôler la masse d'un ruban de fibres - Google Patents

Appareil pour comprimer continuellement ou pour contrôler la masse d'un ruban de fibres Download PDF

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Publication number
EP0417614B1
EP0417614B1 EP19900117028 EP90117028A EP0417614B1 EP 0417614 B1 EP0417614 B1 EP 0417614B1 EP 19900117028 EP19900117028 EP 19900117028 EP 90117028 A EP90117028 A EP 90117028A EP 0417614 B1 EP0417614 B1 EP 0417614B1
Authority
EP
European Patent Office
Prior art keywords
sliver
rollers
air
funnel
gap
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
Application number
EP19900117028
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German (de)
English (en)
Other versions
EP0417614A1 (fr
Inventor
Daniel Erni
Paul Stäheli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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Publication date
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0417614A1 publication Critical patent/EP0417614A1/fr
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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
    • D01H5/72—Fibre-condensing guides
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material

Definitions

  • the invention relates to a device for compressing or for determining the mass of a sliver with a pair of rollers that can be pressed against each other.
  • Compression and measuring devices for fiber tapes made of textile fibers for example following a card or on a draw frame, have long been known and in use.
  • a compression device of the aforementioned type is known from EP-A-00 783 93.
  • Two wedge rollers are shown therein, which delimit an area within which the fiber sliver is compressed.
  • the measurement of density or Mass of the fiber sliver takes place in that one roller is arranged to be stationary and the other is movable and in that the movements of the movable roller are measured, that is to say that the distance between the two rollers in the area of the wedge gap can be measured with the aid of the movable roller .
  • the two rollers are very close, but contactless, so that the towed roller is not driven.
  • the present invention is based on the object of improving the threading of the sliver.
  • the advantage of the invention is, on the one hand, that there is a sufficiently large gap for threading, which on the one hand allows the fiber sliver to be gripped better and on the other hand allows air to be blown through to convey the sliver into the wedge gap.
  • the towed roller can be driven to a predetermined speed by the spacer. before the sliver enters the wedge gap.
  • a further advantageous embodiment of the invention consists in that a fiber sliver introduction funnel is also provided, which pre-compresses the fiber sliver to a predetermined cross-sectional profile and which is arranged such that the fiber sliver is guided through the outlet opening of the guide funnel into said predetermined wedge gap and that at least an air duct is provided such that the compressed air guided therein creates an injector effect in the guide funnel, which sucks the fiber sliver into the funnel.
  • rotating rollers carry air moving on their surface in the direction of movement of these surfaces, which is disadvantageous, for example, if it is undesirable in the converging gap of the two rollers, for example if the air is not between the two rollers is carried out, but in the axial direction of the rollers, that is to say with a deflection of 90 °, escapes and disruptively transports fibers.
  • FIG. 1 shows a pair of rollers 1 as can be used, for example, in connection with a drafting system.
  • the pair of rollers consists of a driven roller 2 and a towed roller 3.
  • the driven roller 2 has a spacer and drive ring 4, on which the circumference of the towed roller 3 rests.
  • the ring 4 not only has the task of driving the drag roller 3 but also to produce a distance A between the two rollers. The purpose of this distance A will be explained later.
  • the driven roller 2 has a drive shaft 5 which is rotatably supported in a stationary bearing 6 and an axis 7 which is also rotatably supported in a stationary bearing 8.
  • the towed roller 3 has an axis 9 which is rotatably mounted in a bearing 10 and an axis 11 which is rotatably supported in a bearing 12.
  • the two bearings 10 and 12 are arranged displaceably in order to give the towed roller the possibility in the directions of movement Y (FIG. 2) of the driven roller 2 and to be moved against it.
  • the mechanism for the movement resp. the guides which accommodate the bearings 10 and 12 to allow movement in the Y direction are known per se and are not explained in detail.
  • the dragged roller 3 When the sliver is introduced, the dragged roller 3 already has a peripheral speed which corresponds to the peripheral speed of the spacer and drive ring 4.
  • the distance A between the two roller surfaces essentially corresponds to the smallest possible thickness D of a sliver F, that is to say to put it more precisely, a few tenths of a millimeter less than the said smallest thickness D.
  • Figures 3 to 8 show pairs of rollers, as shown and described in principle in European Patent No. 00 783 93, which is why only the essential features of it are repeated.
  • Figures 3 and 4 show a pair of rollers 20, as shown in the aforementioned European patent with Figures 1 and 3.
  • the roller pair 20 comprises, again briefly mentioned, a driven stepped roller 21, a towed roller 22, an inventive spacer and drive ring, not shown in the aforementioned European patent specification, which is seen on the driven roller 21 on the right outer edge, with a view of FIG. 3 is firmly arranged on the driven roller 21.
  • the ring 23 is outside the area in which a sliver F.1 is guided between the driven and the towed roller, which is also shown in FIG. 1.
  • the distance and drive ring 23 has a height which the distance A1 ( Figure 3) between a ring 28 and the base of an annular groove 29 results.
  • the ring 28 is part of the dragged roller 22 and the ring groove 29 is provided in the driven roller 21, as mentioned in the aforementioned European patent, to compress the sliver in the area of the gap A.1, respectively. to measure the mass of the sliver.
  • the towed roller 22 can be displaced in the same way as the towed roller 3 of FIG. 1 in the Y directions relative to the stationary, but rotatably arranged, driven roller 21.
  • the spacer and drive ring 23 is fixed on the driven roller 21 and can be made of a material that has a favorable coefficient of friction compared to the towed roller 22.
  • the ring can be made of rubber, for example with the brand name "Adilan”.
  • FIGS. 5 and 6 show the pair of stepped rollers shown and described in the European patent specification 00 78393 with FIGS. 2 and 4, which is identified by 30 in this application.
  • the pair of stepped rollers 30 comprises a driven stepped roller 31, a towed stepped roller 32 and a spacer and drive ring 33, which is arranged on the left edge end, as seen in FIG. 5, of the driven stepped roller 33.
  • This ring is also outside the area in which the sliver is guided and consists of rubber in the same way as described above, for example with the brand name "Adilan”.
  • the drive roller 31 is driven by a drive shaft 34, which is rotatably and drivably mounted in a stationary bearing (not shown).
  • this roller On the opposite side of the shaft 34, this roller has an axis 35, which is also rotatably and drivably mounted in a stationary bearing.
  • the towed stepped roller 32 has an axis 36 and an axis 37, which is each rotatably mounted in movable bearings and can be moved in order to move the towed roller 32 in the directions of movement Y, as mentioned for the towed roller 3 of FIGS. 1 and 2 has been.
  • the sliver is guided in a cross-section which is formed by the stepped rollers and, without sliver, is at a distance A.2 between the opposite stepped rollers due to the spacing and drive ring 33.
  • This distance A.2 is expanded to the effective thickness D.2 of the sliver F.2 when a sliver F.2 is inserted.
  • A.2 is chosen so that this distance is a few tenths of a millimeter smaller than the smallest sliver thickness D2 to be processed.
  • These few tenths of a millimeter can be 3 to 4 tenths of a millimeter.
  • FIG. 7 shows the pair of rollers 20 of FIGS. 3 and 4, in which a fiber sliver introduction funnel is additionally provided, by means of which the fiber sliver is introduced into the gap with the distance A.1.
  • the fiber sliver introduction funnel comprises a funnel body 41, within which the funnel opening 56 is provided, which forms the actual guidance of the fiber sliver F.1.
  • the guide funnel 40 In order to suck the fiber sliver into the funnel opening 56 by means of suction air, the guide funnel 40 has an air chamber 42 which is provided around the funnel body 41 and has outlet openings 44 and 45. Through these outlet openings 44 and 45, the compressed air located in the air chamber 42 emerges and flows between the funnel body 41 and the circumference of the ring 28, respectively. along the bottom of the groove 29 into the gap with the distance A.1 and sucks air through the funnel opening 56 as a result of this injector action. With the aid of this air sucked in through the opening 56, the fiber sliver F.1 can be sucked into this opening.
  • air inlet nozzles 55 can also be provided, which additionally allow compressed air to enter the funnel opening 56, so that the injector effect is thereby increased.
  • the air chamber 42 is connected by means of a connecting line 46 to a changeover valve 47, which is connected on the one hand to a compressed air line 48 and on the other hand to a suction air line 51.
  • the compressed air line 48 is connected to a compressed air source 52 and the suction air line 51 to a suction air source 53.
  • An on-off valve is provided between the compressed air source 52 and the suction air source 53 and the changeover valve 47, specifically for the compressed air with 49 and for the suction air with 50.
  • the switching valve 47 is switched with the aid of a controller 54, which carries out the switching on the basis of a higher-level pulse.
  • the switchover from compressed air to suction air occurs when the threading or, in other words, the introduction of the fiber sliver into the hopper opening 56 has ended and the fiber sliver is routed through the pair of rollers 20 in operation, since at that moment the one carried by the rollers Air in the vicinity of the rollers is no longer desired, so that it can be sucked off with the help of the orifices 44 and 45.
  • FIG. 8 shows the pair of rollers 30 of FIGS. 5 and 6, combined with a sliver introduction funnel 60 and a sliver guide hopper 69, the latter being provided as an optional additive in order to grasp the sliver and, if necessary, to bring it into a predetermined position with the aid of this sliver guide hopper.
  • the fiber sliver insertion funnel 60 comprises a funnel body 61 with a funnel opening 62, by means of which the fiber sliver is guided, pre-compressed, and in this state is introduced into the gap with the distance A.2.
  • the sliver path guide funnel 69 in turn comprises a funnel body 70, in which a funnel opening 71 is tapered in such a way that the inlet opening of the funnel opening 71 is between three to five times wider than the outlet opening of this funnel opening.
  • air inlet or, in other words, injector nozzles 72 are provided in the hopper body 70, which are arranged so inclined to the conveying direction R of the sliver that the compressed air emerging through these nozzles creates a suction effect in the conveying direction R through the hopper opening 71.
  • the step rollers 31 and 32 convey air according to their direction of rotation (shown with the direction of rotation arrows) into the gap with the distance A.2, which with the aid of the suction effect in the Hopper opening 71 is suctioned off.
  • this circumferential air of the step rollers sucked off through the mentioned gap, a certain suction effect also arises in the hopper opening 62, by means of which the sliver can be guided into the hopper opening 62.
  • a compressed air line 65 is on both sides of an on and off valve 66. 67 provided, the compressed air line 65 being connected to the air chamber 64 and the compressed air line 67 being connected to a compressed air source 68.
  • a pressure reducing valve (not shown) can also be installed in the compressed air line 67 in order to adjust the air pressure in the air chamber 64.
  • the sliver path guide funnel 69 also has an air chamber 73 for supplying the compressed air to the air inlet nozzles 72, which air chamber is connected to a compressed air source 77 via a connecting line 74, an on-off valve 75 and a compressed air line 76.
  • a pressure control valve (not shown) can be installed in the compressed air line provided between the compressed air source 77 and the valve 75.
  • angles that the axes of symmetry of the air inlet nozzles 55 and 55 shown in FIGS. 63 resp. 72 with the respective running direction of the sliver must, depending on the conicity of the funnel openings 56 or. 62 resp. 71 be determined empirically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (9)

  1. Dispositif utilisé pour comprimer continuellement ou pour déterminer la masse d'un ruban de fibres (F; F.1; F.2), avec une paire de rouleaux (2,3; 21, 23; 31, 32) pouvant être pressés l'un contre l'autre, dont les surfaces de rouleau possèdent une distance réciproque minimale prédéterminée,
    caractérisé par le fait
    qu'un (2; 21; 31) des deux rouleaux est entraîné, et qu'un moyen de maintien de distance (4; 23; 32) entre les rouleaux (2, 3; 21, 23; 31, 32) est prévu qui maintient la distance, formant une fente (A; A.1; A.2), à une grandeur prédéterminée correspondant à peu près à l'épaisseur la plus petite du ruban de fibres à traiter, de telle manière que l'autre (3; 22; 32) des deux rouleaux est remorqué avant l'introduction du ruban de fibres (F).
  2. Dispositif selon revendication 1,
    caractérisé par le fait que
    le moyen de maintien de distance est un anneau de distance (4; 23; 33) disposé sur l'un des deux rouleaux, en dehors de la zone dans laquelle se trouve le ruban de fibres (F; F.1; F.2).
  3. Dispositif selon revendication 1,
    caractérisé par le fait
    qu'en outre, un entonnoir d'introduction de ruban de fibres (40; 60) est prévu, lequel précomprime le ruban de fibres (F; F.1; F.2) en un profil de section prédéterminé, et qui est disposé de telle manière que le ruban de fibres est guidé à travers l'embouchure de sortie de l'entonnoir de guidage (40; 60) dans ladite fente prédéterminée (A; A.1; A.2), et qu'au moins un canal de guidage d'air (42; 55; 63) est prévu de telle manière que l'air comprimé dirigé dans celui-ci produise un effet d'injection dans la section de l'entonnoir, qui aspire le ruban de fibres dans la section de l'entonnoir.
  4. Dispositif selon revendication 3,
    caractérisé par le fait que
    le canal de guidage d'air (40; 55; 63) est prévu sur l'entonnoir de guidage (40; 60).
  5. Dispositif selon revendication 4,
    caractérisé par le fait que
    le canal de guidage d'air (40; 55; 63) est prévu sur la circonférence de l'entonnoir de guidage (40; 60) de telle manière que l'air d'injection est soufflé sur la circonférence des rouleaux, dans le sens de leur rotation, et dans la fente.
  6. Dispositif selon revendication 5,
    caractérisé par le fait que
    le canal de guidage d'air est également utilisé pour aspirer l'air transporté par la circonférence en mouvement des rouleaux.
  7. Dispositif selon revendications 5 et 6,
    caractérisé par le fait
    qu'une vanne d'inversion (47) est prévue, au moyen de laquelle l'air comprimé est inversé en air aspiré.
  8. Dispositif selon revendication 4,
    caractérisé par le fait que
    le canal de guidage d'air (55; 63) débouche dans l'entonnoir de guidage.
  9. Dispositif selon revendication 8,
    caractérisé par le fait que,
    sur le côté opposé de l'entonnoir de guidage (40), le canal de guidage d'air (42) est ensuite dirigé vers la fente (A.1) de telle manière que de l'air est aspiré à travers l'entonnoir de guidage et à travers la fente.
EP19900117028 1989-09-15 1990-09-05 Appareil pour comprimer continuellement ou pour contrôler la masse d'un ruban de fibres Expired - Lifetime EP0417614B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH336389A CH680225A5 (fr) 1989-09-15 1989-09-15
CH3363/89 1989-09-15

Publications (2)

Publication Number Publication Date
EP0417614A1 EP0417614A1 (fr) 1991-03-20
EP0417614B1 true EP0417614B1 (fr) 1994-02-02

Family

ID=4254358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900117028 Expired - Lifetime EP0417614B1 (fr) 1989-09-15 1990-09-05 Appareil pour comprimer continuellement ou pour contrôler la masse d'un ruban de fibres

Country Status (3)

Country Link
EP (1) EP0417614B1 (fr)
CH (1) CH680225A5 (fr)
DE (1) DE59004495D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1241367B (it) * 1990-12-21 1994-01-10 Sant Andrea Novara Spa Dispositivo per la manipolazione di un capo di un nastro di fibre tessili.
DE4230317C2 (de) * 1992-09-10 1998-07-23 Rieter Ag Maschf Doppelriemchenstreckwerk für eine Spinnmaschine
US6581248B1 (en) 1997-01-23 2003-06-24 Maschinenfabrik Rieter Ag Carding machine with drawing rollers at the outlet

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE503595A (fr) * 1950-05-30
ES439762A1 (es) * 1975-07-28 1977-05-01 Rosique Gracia Zacarias Perfeccionamientos en las disposiciones autorreguladoras pa-ra cinta de carda.
DE2802735A1 (de) * 1977-02-17 1978-08-31 Heberlein Hispano Sa Pressvorrichtung fuer ein textilfaserband
DE3569760D1 (en) * 1985-02-15 1989-06-01 Rieter Ag Maschf Apparatus for the continuous mass control of a fibre ribbon
DE3612133C2 (de) * 1986-04-10 1995-02-16 Truetzschler Gmbh & Co Kg Bandführungskanal zwischen Ausgangswalzen und Kalanderwalzen an einer Spinnereivorbereitungsmaschine

Also Published As

Publication number Publication date
EP0417614A1 (fr) 1991-03-20
CH680225A5 (fr) 1992-07-15
DE59004495D1 (de) 1994-03-17

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