EP2669230A1 - Unité de déroulage pour appareil d'impression de tissus - Google Patents

Unité de déroulage pour appareil d'impression de tissus Download PDF

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Publication number
EP2669230A1
EP2669230A1 EP12170135.3A EP12170135A EP2669230A1 EP 2669230 A1 EP2669230 A1 EP 2669230A1 EP 12170135 A EP12170135 A EP 12170135A EP 2669230 A1 EP2669230 A1 EP 2669230A1
Authority
EP
European Patent Office
Prior art keywords
unrolling
fabric
group
take
axis
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Withdrawn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
EP12170135.3A
Other languages
German (de)
English (en)
Inventor
Paolino Gastoldi
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.)
La Meccanica Costruzione Macchine Tessili SpA
Original Assignee
La Meccanica Costruzione Macchine Tessili SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by La Meccanica Costruzione Macchine Tessili SpA filed Critical La Meccanica Costruzione Macchine Tessili SpA
Priority to EP12170135.3A priority Critical patent/EP2669230A1/fr
Publication of EP2669230A1 publication Critical patent/EP2669230A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/032—Controlling transverse register of web
    • B65H23/035—Controlling transverse register of web by guide bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/182—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations
    • B65H23/1825—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations and controlling web tension
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
    • D06C3/08—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics by frames or like apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/61—Longitudinally-extending strips, tubes, plates, or wires
    • B65H2404/612—Longitudinally-extending strips, tubes, plates, or wires and shaped for curvilinear transport path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/67—Other elements in face contact with handled material rotating around an axis parallel to face of material and parallel to transport direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/31—Tensile forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/174—Textile; fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/12—Single-function printing machines, typically table-top machines

Definitions

  • the present invention relates to an unrolling group for fabric printer apparatus of the type pointed out in the preamble of the first claim.
  • the invention relates to an unrolling group belonging to a printer apparatus of natural fabrics, cotton or linen for example, and/or fabrics of synthetic origin such as polyester and Lycra ® . More particularly, the invention relates to an unrolling group of a fabric printer apparatus of the inkjet type.
  • unrolling groups belonging to printer apparatus, are adapted to unroll the fabric and lay it on a conveyor belt or other conveying member adapted to take the fabric itself to a printing unit carrying out printing of the fabric.
  • known unrolling groups comprise an unrolling cylinder adapted to support a rolled-up fabric, or reel, and one or more tension rollers that, being suitably offset, enable the fabric to be stretched out so that it is disposed on the belt perfectly taut and smooth in order to offer a flat surface for printing.
  • a first important problem is represented by the fact that, in spite of the presence of tension rollers, the fabric, when it reaches the belt, does not appear to be perfectly taut, thereby defining a printing surface that is not perfectly flat and is therefore capable of giving rise to print errors.
  • a further problem resides in that, due to the difficulties in spreading the fabric out, known unrolling groups and consequently printers presently in use do not operate at high rates for the purpose of reducing this problem and in an attempt of minimising the production rejects.
  • the technical task underlying the present invention is to conceive an unrolling group for fabric printer apparatus capable of substantially obviating the mentioned drawbacks.
  • Another important aim of the invention is to obtain an unrolling group ensuring high production rates and practically the absence of rejects.
  • the unrolling group for fabric printer apparatus is generally identified by reference numeral 1.
  • a reel 10 i.e. a continuous tape of fabric 10a, paper or other similar material rolled up on a cylindrical support so as to enable a working operation such as printing, cutting and folding to be carried out.
  • the unrolling group 1 is part of a printer apparatus 100, preferably of the inkjet type, and allows a reel 20 of either synthetic fabric 10a, polyester or Lycra ® for example, or natural fabric such as cotton or linen, to be unrolled so as to arrange it on a conveyor belt 1a adapted to bring the fabric 10a in correspondence with a printer (not shown).
  • the unrolling group 1 comprises a supporting structure 20 adapted to support the components of the unrolling group 1 and enable arrangement thereof on a rest surface 1b, a floor for example; an unrolling unit 30 adapted to support and unroll reel 10 through rotation about an unrolling axis 30a and defining an advancing or feeding direction; and an extending apparatus 40 adapted to stretch out the fabric 10a coming out of reel 10 so as to enable working thereof in the subsequent printing unit.
  • the supporting structure 20 comprises two side plates 21 disposed almost perpendicular to the rest surface 1b and mutually connected by tie-rods 22, section bars or other similar structural elements adapted to provide steadiness to the supporting structure 20 and, consequently, the unrolling group 1.
  • structure 20 has a plurality of feet 23 between the side plates 21 and rest surface 1 b, which feet are characterised by an adjustable height so as to dispose the unrolling axis 30a substantially parallel to the rest surface 1b.
  • the unrolling group 1 comprises the unrolling unit 30 and extending apparatus 40 suitably connected to the supporting structure 20.
  • the unrolling unit 30 comprises a cylinder 31 adapted to support reel 10 and defining the unrolling axis 30a.
  • the cylinder 31 is an expandable cylinder, preferably of the pneumatic type, i.e. adapted to expand following increase of the inner pressure.
  • said reel translation can be prevented by stops adapted to abut against reel 10, thereby preventing translations thereof along substantially the unrolling axis 30a.
  • a motor 32 can be provided, usually of the electric type, adapted to operate unrolling of reel 10 through rotation of cylinder 31 and, therefore, of reel 10 around the unrolling axis 30a.
  • the unrolling group 1 shows the extending apparatus 40.
  • This extending apparatus 40 comprises one or more rollers/cylinders connected in a motion-admitting manner to structure 20 so as to rotate, preferably idly, around axes substantially parallel to the unrolling axis 30a and, therefore stretch out the fabric 10 unwound from reel 10; a take-up member 41 defining a sliding surface 41b for the fabric 10a.
  • the extending apparatus 40 has first rollers 42 and second rollers 43 disposed before and after member 41 respectively, in the fabric advancing direction, as shown in Fig. 1 .
  • the take-up member 41 defines a sliding surface 41 b of the arched type the concavity of which preferably faces belt 1a. It is suitably disposed in such a manner that the sliding surface 41 b is substantially included between the unrolling axis 30a, belonging to the unrolling unit 30, and the rotation axis of the last one of the first rollers 42 that is faced by the fabric 10a before reaching the take-up member 41 itself.
  • the take-up member 41 comprises a plate 44 defining the sliding surface 42b; one or more stiffening elements 45 comprising plates or other similar elements adapted to give plate 44 appropriate steadiness.
  • plate 44 is of the faceted type and therefore defines a sliding surface 41 b of the polygonal type.
  • the take-up member 41 can contemplate the presence of a plurality of rollers or other rolling elements having rotation axes substantially parallel to each other and such disposed as to define a sliding surface 41 b of the arched type, the concavity of which faces belt 1a, i.e. a surface similar to that defined by plate 44.
  • the take-up member 41 advantageously comprises a constraint 46 adapted to engage the take-up member 41 with said supporting structure 20 in a motion-admitting manner, i.e. to connect member 41 to structure 20 enabling the take-up member 41 to oscillate relative to structure 20 around an oscillation axis 41a non parallel and transverse to the unrolling axis 30a.
  • the oscillation axis 41 lies in a plane substantially perpendicular to the unrolling axis 30a and still more particularly, it is substantially perpendicular to the unrolling axis 30a and lies in the centre of gravity plane, i.e. the plane substantially passing through the centre of gravity of the take-up member 41.
  • Constraint 46 fastens the take-up member 41 to one of the tie-rods 22 and can be identified by a turning joint, i.e. a joint restricting the relative motion of member 41 with respect to the rest of group 1 to a single rotation or, alternatively, by a ball joint i.e. a joint restricting said relative motion to a rotation with respect to a material point defined by the ball joint itself.
  • constraint 46 when it is a ball joint as in the illustrated example, has a sleeve 46a integral with a tie-rod 22; a pin 46b defining the oscillation axis 41 a and rigidly and fixedly connected to plate 44 through a stiffening element 45; and bearings 46c, bushes or other similar elements adapted to fasten sleeve 46a in a motion-admitting manner to pin 46b so as to enable the pin 46b and sleeve 46a to mutually rotate around the oscillation axis 41 a.
  • the take-up member 41 in order to make the take-up member 41 steadier, it comprises at least one carriage 47 adapted to slide in a sliding plane 47a substantially parallel to the unrolling axis 30a and, preferably, perpendicular to the oscillation axis 41 a.
  • the take-up member 41 comprises two carriages 47 disposed at the side ends of the take-up member 41 while constraint 46 is disposed between the two carriages 47 preferably at a position spaced apart the same distance from carriages 47.
  • Carriages 47 comprise a base body 47b, rigidly and fixedly connected to member 41 and one or more contact bodies 47c, wheels for example, resting on a support 24 rigidly connected to a tie-rod 22 and defining the sliding plane 47a.
  • extension of support 24 enables oscillation of the take-up member 41 around the oscillation axis 41 a of a width substantially smaller than 15° and preferably substantially smaller than 10°.
  • the extending apparatus 40 comprises at least one dancer adapted to move a first mobile roll 42a suitably along a substantially vertical direction, i.e. perpendicular to the rest surface 1 b.
  • Each dancer 43 comprises a guide 48a defining a straight movement way; a carriage 48b adapted to slide along the guide and connected to the first mobile roller 42a; two pulleys 48c or gears; a driving belt/chain 48d connected to the first mobile roller 42a and stretched between the two pulleys 48 or gears; and an encoder or other similar mechanism adapted to set the pulleys 48c in motion so as to adjust and substantially maintain tensioning of fabric 10a.
  • two stop limits can be provided which can be identified by a pinion provided with a cam operating inversion of the translation motion of the first movable roller 42a.
  • two photoelectric cells adapted to read translation of the first roller 42a can be provided.
  • the unrolling group carries out an innovative printing process for a fabric 10a.
  • the printing process contemplates, in a manner known by itself, a preparation step in which the reel 10 is fastened to the unrolling unit 30; an unrolling step in which reel 10, by rotating around the unrolling axis 30a, is unwound; an extension step in which the fabric is laid down; and a working step in which the fabric 10a reaches belt 1 a and therefore is brought to the printing unit.
  • the extension step, performed by the unrolling group 1, originally comprises a take-up sub-step in which the fabric 10a is guided around an oscillation axis 41 a transverse to the unrolling axis 30a. It further contemplates a first and a second tensioning sub-steps adapted to stretch the fabric out and carried out before and after the take-up sub-step respectively.
  • the fabric 10a reaches the first rollers 42 that, due both to their arrangement and to the presence of dancer 40, make the fabric 10a taut.
  • the fabric 10a goes on advancing and goes beyond the first rollers 42 thus completing the first tensioning sub-step; then it slides along the sliding surface 41 b starting the take-up sub-step.
  • the fabric 10a has an uneven form and, in detail, one of the side edges, i.e. the edges parallel to the advancing direction, is more extended than the other, it exerts a non-perfectly distributed force on the take-up member that will give rise to the presence of a rotational moment relative to the oscillation axis 41 a and acting on the member 41 itself.
  • This rotation moment therefore imposes oscillation of the take-up member 41 and the fabric 10a laid down thereon relative to axis 41 a and, simultaneously, translation of carriages 47 in the sliding plane 47a.
  • the fabric portion 10a encounters the second rollers 43 where the second tensioning sub-step occurs.
  • the invention achieves important advantages.
  • a first advantage is represented by the fact that, in spite of the presence of serious defects, such as the inexact sizing of fabric 10a, the unrolling group 1 enables fabric 10a to be always perfectly taut and stretched out and therefore devoid of creases or gathering effects that usually deteriorate printing in known printers.
  • the unrolling group 41 allows any fabric 10a to reach the printer in a perfectly extended condition, irrespective of the presence of faults.
  • the unrolling group 1 allows the fabric 10a to reach the printer perfectly taut even if during the manufacturing step it appears with errors (creases/pleats) or is not perfectly squared and therefore is of uneven shape, with side edges non parallel to each other, or a side edge more extended than the other.
  • Another advantage is therefore represented by the fact that the printer apparatus 100 and, in detail, group 1 allows printing of high quality and accuracy to be obtained giving rise to a production almost devoid of rejects.
  • a further advantage is represented by the fact that the unrolling group 1 is able to reach high production rates and simultaneously high printing quality, as compared with known groups.
  • the unrolling group 1 is suitable to unroll reel 10 more quickly so that a greater amount of fabric 10a can reach the printer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP12170135.3A 2012-05-31 2012-05-31 Unité de déroulage pour appareil d'impression de tissus Withdrawn EP2669230A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12170135.3A EP2669230A1 (fr) 2012-05-31 2012-05-31 Unité de déroulage pour appareil d'impression de tissus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12170135.3A EP2669230A1 (fr) 2012-05-31 2012-05-31 Unité de déroulage pour appareil d'impression de tissus

Publications (1)

Publication Number Publication Date
EP2669230A1 true EP2669230A1 (fr) 2013-12-04

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ID=46465016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12170135.3A Withdrawn EP2669230A1 (fr) 2012-05-31 2012-05-31 Unité de déroulage pour appareil d'impression de tissus

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103896091A (zh) * 2014-04-09 2014-07-02 惠州市赢合科技有限公司 自动分切机及自动分切优化设计方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591064A (en) * 1969-06-23 1971-07-06 Turbo Machine Co Continuous band director
US3881414A (en) * 1973-08-20 1975-05-06 American Bank Note Co Apparatus for controlling the lateral position of an elongated web
DE19544996A1 (de) * 1995-12-02 1997-06-05 Reffelmann & Belz Gmbh Vorrichtung zum Richten gewebter Etiketten
US5833171A (en) * 1995-12-05 1998-11-10 Equa-Liner Systems, L.L.C. Web tension equalizing roll and tracking apparatus
JP2003201665A (ja) * 2001-12-26 2003-07-18 Konica Corp 捺染装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591064A (en) * 1969-06-23 1971-07-06 Turbo Machine Co Continuous band director
US3881414A (en) * 1973-08-20 1975-05-06 American Bank Note Co Apparatus for controlling the lateral position of an elongated web
DE19544996A1 (de) * 1995-12-02 1997-06-05 Reffelmann & Belz Gmbh Vorrichtung zum Richten gewebter Etiketten
US5833171A (en) * 1995-12-05 1998-11-10 Equa-Liner Systems, L.L.C. Web tension equalizing roll and tracking apparatus
JP2003201665A (ja) * 2001-12-26 2003-07-18 Konica Corp 捺染装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103896091A (zh) * 2014-04-09 2014-07-02 惠州市赢合科技有限公司 自动分切机及自动分切优化设计方法
CN103896091B (zh) * 2014-04-09 2017-02-08 惠州市赢合科技有限公司 自动分切机及自动分切优化设计方法

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