EP0860531A2 - Machine pour le couplage croisé de nappes non-tissées cardées avec une bande de déchargement rotative - Google Patents

Machine pour le couplage croisé de nappes non-tissées cardées avec une bande de déchargement rotative Download PDF

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Publication number
EP0860531A2
EP0860531A2 EP98102497A EP98102497A EP0860531A2 EP 0860531 A2 EP0860531 A2 EP 0860531A2 EP 98102497 A EP98102497 A EP 98102497A EP 98102497 A EP98102497 A EP 98102497A EP 0860531 A2 EP0860531 A2 EP 0860531A2
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EP
European Patent Office
Prior art keywords
trolley
belt
unloading
roller
machine
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.)
Withdrawn
Application number
EP98102497A
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German (de)
English (en)
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EP0860531A3 (fr
Inventor
Vani Olivo
Paolo Olivo
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Individual
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Individual
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Publication date
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Publication of EP0860531A2 publication Critical patent/EP0860531A2/fr
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)

Definitions

  • the present invention concerns the sector of coupling devices for webs composed of not woven fibers, which may be either synthetic, vegetal, or animal fibers.
  • the invention concerns the devices for the cross coupling of layers of these webs.
  • the webs of not woven fibers are obtained by repeatedly carding masses of fibers of various nature until obtaining a layer of these fibers, all arranged in the same direction.
  • machines provided with several conveyor belts are used to couple webs whose fibers have cross or perpendicular directions, and in these machines one belt transports the web or webs, while other belts provide for laying the web to be positioned on the preceding web or webs.
  • the edge of the conveyor belt that lays down the web travels forward and backward between the edges of the belt that transports the web or webs on which the successive web is to be laid.
  • the movement of the edge of the belt transporting the web to be laid down is compensated for by a corresponding, identical translation performed by a cylinder around which the belt itself slides.
  • the main parts of the machine comprise two conveyor belts, various fixed or travelling cylinders around which the two conveyor belts rotate, three trolleys sliding on rails, inextensible bands, anti-deviation devices, electric motors with rapid start and stop, several tighteners for the conveyor belts and the inextensible bands or chains.
  • Other less important devices and/or complementary accessories will be mentioned and illustrated in the following detailed description.
  • the unloading belt and the conveyor belt advance direction is perpendicular to the collection belt.
  • the conveyor belt travel has the shape of a variable ring positioned above the collection belt.
  • the travel of the conveyor belt is made up of a first section from the point in which it receives the web from the card to the opposite edge of the collection belt, a descent section toward the collection belt, a return section toward the unloading point, a further return section and a last upward section.
  • the conveyor belt (upper part of the ring-shaped travel) receives the web from the card and covers a horizontal section and a successive downward section, passes around the roller provided for the coupling with the unloading belt, in such a way as to hold the web to be laid down, covers an horizontal section until reaching the unloading roller and there separates from the unloading belt, then continues its horizontal movement to reach a fixed roller, passes around the recovery roller and returns to the point in which it receives the web from the card.
  • the unloading belt is partially arranged around the conveyor belt and moves around some rollers, its path resembling a horizontal U.
  • the unloading belt runs a forward and backward travel above the upper horizontal section of the conveyor belt, rotates around an auxiliary roller, goes down to the roller for the coupling with the conveyor belt, covers a horizontal section until reaching the unloading roller together with the conveyor belt, at the same time holding the web, and then returns to the upper horizontal section passing around other auxiliary rollers.
  • Some rollers guide the conveyor belt along its whole travel.
  • the roller around which the unloading belt couples with the conveyor belt the roller in correspondence with which the conveyor belt separates from the unloading belt and lays down the web and a recovery roller placed in the return section - a section along which the conveyor belt moves after laying down the web - are not fixed, but each one of them is positioned on a trolley that slides parallelly to the surface of the collection belt.
  • the roller in correspondence with which the conveyor belt separates from the unloading belt and lays down the web hereinafter called unloading roller, is positioned on a trolley that indicatively slides from one edge to the other of the unloading belt, thus moving the point of separation from the unloading belt, and therefore the web release point, from one edge to the other of the web/webs on which the successive web is to be laid down.
  • the roller around which the conveyor belt couples with the unloading belt is positioned on a trolley that slides from the edge opposite that in which the conveyor belt receives the web to approximately half the width of the collection belt.
  • the recovery roller is positioned on a trolley that slides indicatively from the edge near the point in which the conveyor belt receives the web to approximately half the width of the collection belt, in such a way as to maintain the travel of the conveyor belt constant.
  • the unloading trolley travels at a given speed, while the recovery trolley and the coupling trolley travel at a speed that is equal to half the speed of the unloading trolley.
  • the coupling trolley advances in the same direction as the unloading trolley, but at half its speed, this ensures continuous and constant feeding of web to the unloading roller, that is, continuous and constant unloading of web.
  • these trolleys are connected with inextensible bands along a generically ring-shaped path.
  • an inextensible belt drives both the recovery trolley and the coupling trolley, in such a way as to maintain the movement of the two trolleys constant and equal (though in opposite directions).
  • Tighteners are provided to guarantee that the tension of the conveyor belts and of the inextensible bands remains constant for the whole period of operation of the machine and during the various acceleration and deceleration phases of the trolleys.
  • Two anti-deviation devices applied to the conveyor belt and the unloading belt, respectively, compensate for the lateral movement to which the belts may be subjected because of the imperfect parallelism of the various rollers or because of external agents.
  • the whole machine is controlled through an electric or electronic system or through an electronic computer.
  • One of the main characteristics of the new machine lies in the fact that the web is received directly by the belt that will unload it on the collection belt.
  • the web supplied by the card covers a single, brief distance before being laid down.
  • the new machine makes use of the upper unloading belt, which also serves to insulate the web from the environment during its transport.
  • the new machine being provided with two conveyor belts only, has extremely simplified and therefore light moving parts.
  • the inertial moments to be controlled during the stroke of the trolleys in the two directions are low. This ensures better response during reverse, better linearity of the trolley speed and reduced motive power applied.
  • a third trolley in the conveyor belt makes it possible to use two trolleys that travel in opposite directions to improve the balance of the machine.
  • the machine is provided with a closed-ring driving system, which ensures perfectly equal reversing times, on both travelling directions of the trolleys.
  • the reversing of the trolleys has always represented a weak point in the design of machines for coupling carded fibers.
  • the homogeneity of the unloaded fiber mainly depends on the behaviour of the trolleys during their motion.
  • the belts collect a greater quantity of fibers in the passage points of the circuits.
  • the greater quantity of material can be observed exactly at the ends of the unloading trolley stroke and at a certain distance from these points, towards the centre of the transported web.
  • the transversal profile of the laid-down fiber is irregular, thicker on the edges in correspondence with the points where more material is laid down, as described above.
  • the causes of this irregular thickness of the web may be the inertia of the trolley in the moment in which it reverses and the inertia of the motor that drives the trolley, since the latter has to slow down, stop and start again in the opposite direction.
  • the new machine drastically reduces the slowing down, stop and restart times of the unloading trolley, by employing a driving motor for each traveling direction of the trolley.
  • band tighteners are adopted, which move one or more cylinders or pulleys around which the band rotates.
  • each band has one end fixed to the trolley, rotates around pulleys or cylinders, one of which is integral with the motor, and has the other end connected with the same trolley.
  • Two electric motors directly transmit the motion to the bands, each for every sliding direction of the unloading trolley.
  • the motors are preferably positioned on areas of the machine corresponding to the ends of the unloading trolley stroke.
  • Tighteners are provided to linearly translate some cylinders or pulleys around which the bands rotate.
  • Said tighteners are two for each motor and are positioned one at the beginning (upper) and one at the end (lower), along the travel of the band with respect to the motor; that is, one tightener, hereinafter called upper tightener, positioned between the motor and the unloading trolley and one tightener, hereinafter called lower tightener, positioned between the motor and the recovery trolley.
  • Proximity sensors are positioned along the travel of the unloading trolley and detect its getting near the ends of its stroke.
  • the machine is completely operated and controlled through appropriate electric and/or electronic circuits and/or through a computer.
  • One of the motors exerts its tractive force on the band that drives the unloading trolley; consequently the other band, sliding around the various rollers or pulleys drives the recovery trolley in the opposite direction.
  • the upper tightener positioned between the turned off motor and the unloading trolley holds the roller or pulley in the position that is furthest from the unloading trolley, that is, in the position in which the band covers a longer distance between the motor and said trolley.
  • the lower tightener positioned between the turned off motor and the recovery trolley holds the roller or pulley in the position that is nearest to the recovery trolley, that is, in the position in which the band covers a shorter distance between the motor and said trolley.
  • the motor suitable for driving the unloading trolley in the opposite direction is operated.
  • the band positioned between the unloading trolley and the motor that drives the unloading trolley in its return stroke would be excessively stretched, while the band positioned between said motor and the recovery trolley would be slack.
  • the appropriate upper and lower tighteners relevant to the motor that has just been started are operated and, traveling in the opposite direction, they reduce the distance covered by the band between said motor and the unloading trolley and at the same time they lengthen the distance between said motor and the recovery trolley.
  • the use of these devices in the two idling motors prevents the unloading trolley from being subjected to the restart of a possible single motor for the rotation in the opposite direction; the use of idling motors prevents the trolley from being subjected to the slowing down of the driving motor and the acceleration of the return motor; the use of the tighteners for the driving bands keeps the tension of the bands themselves constant and makes the unloading trolley move back much more quickly when it reverses; the return speed is equal to the sum of the motor rotation speed and the tightener travel speed.
  • the rollers can have considerable lengths and therefore can be bent, even with significant deflections that are dangerous for the operation of the machine.
  • rollers will have their rotary support shifted toward the center inside the roller itself, in such a way as to provide a "rotary fixed end” that halves such central lowering.
  • Each of these supports comprises a pin with considerable diameter fixed to the structure, whose end facing the roller is provided with a big cylinder or barrel.
  • Two ball bearings to which the roller is applied are fixed onto the external surface of said cylinder or barrel.
  • the length and dimensions of the cylinder or barrel, and also the dimensions of the ball bearings are such as to prevent any relative bending between the roller ends and said cylinder or barrel.
  • the pin connecting said cylinder or barrel to the structure of the machine is fixed to the structure itself by means of a double spline on both sides of the wall to which it is constrained.
  • the machine is not provided with a mechanical shaft for the transmission of motion to the complicated right and left trolleys.
  • the complicated trolleys are driven by two motors, the synchronism of which is electronically controlled through a proper computerized system.
  • Figure 1 diagrammatically shows a vertical section of the machine, perpendicular to the advance direction of the web or webs on which the successive web is laid.
  • the web or webs on which the successive web is to be laid are transported by the collection belt (1).
  • the conveyor belt (2) which rotates around a series of rollers, slides above said collection belt (1) along a generically ring-shaped path. Said conveyor belt (2) receives the web from the card (3) and covers a horizontal section and a successive downward section, passes around the roller (7) provided for the coupling with the unloading belt (4), in such a way as to hold the web to be laid down, covers another horizontal section until reaching the unloading roller (5) and separates from the unloading belt (4), then continues its horizontal travel to reach a fixed roller, passes around the recovery roller (6) and returns to the point in which it receives the web from the card (3).
  • the unloading belt (4) runs a forward and backward travel above the upper horizontal section of the conveyor belt (2), rotates around an auxiliary roller, goes down to the roller (7) for the coupling with the conveyor belt, covers a horizontal section until reaching the unloading roller (5) together with the conveyor belt (2), at the same time holding the web, and then returns to the upper horizontal section passing around other auxiliary rollers.
  • the unloading roller (5), the recovery roller (6) and the coupling roller (7) are installed on trolleys (8, 9, 10) that slide on appropriate rails (11) parallelly to the surface of the collection belt.
  • the trolley (8) of the unloading roller (5) indicatively slides from one edge to the other of the collection belt (1), thus moving the point in which the web is released from one edge to the other of the web or webs on which the successive web is to be laid.
  • the trolley (10) of the coupling roller (7) slides from the edge opposite that in which the conveyor belt (2) receives the web, to approximately half the width of the collection belt (1).
  • the trolley (9) of the recovery roller (6) slides indicatively from the edge near the point in which the conveyor belt (2) receives the web, to approximately half the width of the collection belt (1), in such a way as to maintain the total distance covered by the conveyor belt (2) constant.
  • the unloading trolley (8) travels at a given speed, while the recovery trolley (9) and the coupling trolley (10) travel at a speed that is half the speed of the unloading trolley (8).
  • the trolleys (8, 9, 10) are connected with inextensible bands (12) along a generically ring-shaped path or, alternatively, as illustrated in Figure 4.
  • an inextensible band (12) pulls either the recovery trolley (9) and the coupling trolley (10), in such a way as to maintain the movement of the two trolleys (9, 10) constant and equal (though in opposite directions).
  • Each inextensible band (12) is operated by two idling electric motors (16), each one of which pulls in a single direction and functions as freewheel in the reverse rotation. Tighteners (13, 14) ensure that the tension of the conveyor belts (2, 4) and of the inextensible bands (12) remains constant for the whole period of operation of the machine.
  • each inextensible band (12) is provided with four tighteners (13) working in pairs, with opposite action, before and after each electric motor (16).
  • Proximity sensors (17) are positioned along the travel of the unloading trolley (8) and detect its getting near the ends of its stroke.
  • Fig. 2 shows three phases of the sliding of the belts and of the trolleys (8, 9, 10).
  • Fig. 3 shows the "fixed end" of each roller shaped in such a way as to reduce the deflections due to the operation.
  • Said "fixed end” is made up by a pin (18) with considerable diameter fixed to the structure (19), whose end facing the roller (R) is provided with a big cylinder or barrel (20).
  • Two ball bearings (21) to which the roller is applied are fixed onto the external surface of said cylinder or barrel (20).
  • the length and dimensions of the cylinder or barrel (20), and also the dimensions of the ball bearings (21) are such as to prevent any relative bending between the ends of the roller (R) and said cylinder or barrel (20).
EP98102497A 1997-02-19 1998-02-13 Machine pour le couplage croisé de nappes non-tissées cardées avec une bande de déchargement rotative Withdrawn EP0860531A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD970033 1997-02-19
ITPD970033 IT1291420B1 (it) 1997-02-19 1997-02-19 Macchina per l'accoppiamento incrociato di veli di fibre cardate non tessute con nastro di deposizione rotante

Publications (2)

Publication Number Publication Date
EP0860531A2 true EP0860531A2 (fr) 1998-08-26
EP0860531A3 EP0860531A3 (fr) 2003-01-22

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EP98102497A Withdrawn EP0860531A3 (fr) 1997-02-19 1998-02-13 Machine pour le couplage croisé de nappes non-tissées cardées avec une bande de déchargement rotative

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EP (1) EP0860531A3 (fr)
IT (1) IT1291420B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1686205A1 (fr) * 2005-04-04 2006-08-02 Studio Tex-Nology Srl Appareil étaleur-nappeur pour des voiles cardeuses et procédé pour déposer des voiles
EP1816243A1 (fr) * 2006-02-01 2007-08-08 Oskar Dilo Maschinenfabrik KG Dispositif de pose d'un non-tissé

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1886919A (en) * 1930-10-06 1932-11-08 Fredrick C Sturgis Lapping machine
US3682734A (en) * 1969-07-18 1972-08-08 Kimberly Clark Co Method and apparatus for bias crosslaying a fiber web
FR2553102A1 (fr) * 1983-10-07 1985-04-12 Asselin Ets Etaleur-nappeur
US4830351A (en) * 1988-01-27 1989-05-16 Morrison Berkshire, Inc. Batt stabilization in cross-lapped web manufacturing apparatus
US4944502A (en) * 1987-11-10 1990-07-31 Autefa Maschinenfabrik Gmbh Card webber
EP0398240A1 (fr) * 1989-05-15 1990-11-22 E.I. Du Pont De Nemours And Company Plieuse pour nappes, en particulier en croix
EP0517568A1 (fr) * 1991-06-03 1992-12-09 ETABLISSEMENTS ASSELIN (Société Anonyme) Etaleur-nappeur
EP0517563A1 (fr) * 1991-06-03 1992-12-09 Asselin Etaleur-nappeur
EP0522893A2 (fr) * 1991-06-03 1993-01-13 ETABLISSEMENTS ASSELIN (Société Anonyme) Etaleur-nappeur
US5400475A (en) * 1990-03-30 1995-03-28 Hergeth Hollingsworth Gmbh Nonwoven laying device having downward angled conveyor at delivery carriage

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1886919A (en) * 1930-10-06 1932-11-08 Fredrick C Sturgis Lapping machine
US3682734A (en) * 1969-07-18 1972-08-08 Kimberly Clark Co Method and apparatus for bias crosslaying a fiber web
FR2553102A1 (fr) * 1983-10-07 1985-04-12 Asselin Ets Etaleur-nappeur
US4944502A (en) * 1987-11-10 1990-07-31 Autefa Maschinenfabrik Gmbh Card webber
US4830351A (en) * 1988-01-27 1989-05-16 Morrison Berkshire, Inc. Batt stabilization in cross-lapped web manufacturing apparatus
EP0398240A1 (fr) * 1989-05-15 1990-11-22 E.I. Du Pont De Nemours And Company Plieuse pour nappes, en particulier en croix
US5400475A (en) * 1990-03-30 1995-03-28 Hergeth Hollingsworth Gmbh Nonwoven laying device having downward angled conveyor at delivery carriage
EP0517568A1 (fr) * 1991-06-03 1992-12-09 ETABLISSEMENTS ASSELIN (Société Anonyme) Etaleur-nappeur
EP0517563A1 (fr) * 1991-06-03 1992-12-09 Asselin Etaleur-nappeur
EP0522893A2 (fr) * 1991-06-03 1993-01-13 ETABLISSEMENTS ASSELIN (Société Anonyme) Etaleur-nappeur

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1686205A1 (fr) * 2005-04-04 2006-08-02 Studio Tex-Nology Srl Appareil étaleur-nappeur pour des voiles cardeuses et procédé pour déposer des voiles
EP1816243A1 (fr) * 2006-02-01 2007-08-08 Oskar Dilo Maschinenfabrik KG Dispositif de pose d'un non-tissé
US7810218B2 (en) 2006-02-01 2010-10-12 Oskar Dilo Maschinenfabrik Kg Cross lapper
CN101012580B (zh) * 2006-02-01 2010-10-27 奥斯卡迪罗机械制造公司 交叉铺网机

Also Published As

Publication number Publication date
IT1291420B1 (it) 1999-01-11
EP0860531A3 (fr) 2003-01-22
ITPD970033A1 (it) 1998-08-19

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