EP0791402B1 - Einrichtung zur Beschichtung eines laminaren Substrates mit einer Harzlage - Google Patents

Einrichtung zur Beschichtung eines laminaren Substrates mit einer Harzlage Download PDF

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Publication number
EP0791402B1
EP0791402B1 EP97102835A EP97102835A EP0791402B1 EP 0791402 B1 EP0791402 B1 EP 0791402B1 EP 97102835 A EP97102835 A EP 97102835A EP 97102835 A EP97102835 A EP 97102835A EP 0791402 B1 EP0791402 B1 EP 0791402B1
Authority
EP
European Patent Office
Prior art keywords
duct
resin
conveyor
laminar substrate
station
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
EP97102835A
Other languages
English (en)
French (fr)
Other versions
EP0791402A1 (de
Inventor
Giovanni Vincenzi
Pierangelo Semeraro
Ivo Tozzi
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.)
Demak SRL
Original Assignee
Demak SRL
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Filing date
Publication date
Application filed by Demak SRL filed Critical Demak SRL
Publication of EP0791402A1 publication Critical patent/EP0791402A1/de
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C13/00Means for manipulating or holding work, e.g. for separate articles

Definitions

  • the present invention relates to a system for coating at least one laminar substrate with a layer of resin, comprising:
  • the system usually also comprises an irradiation station which brings about cross-linking of the resin applied and is disposed along the conveyor, downstream of the application station.
  • Systems of the type indicated above are generally used for coating substrates such as, for example, labels carrying graphic representations of some kind, with a layer of transparent resin so as to protect them from the outside atmosphere and make them more glossy.
  • one or more operators place a plurality of labels on each table and fix them thereto with mechanical devices before the tables pass through the resin-application and -cross-linking stations. At the output from the last of these stations, the same operators, or others, release the coated labels from the tables and unload them therefrom.
  • the present invention relates to a system for coating laminar substrates, which has the features indicated in the preamble of claim 1.
  • a system of this kind is known from prior art document US-A-3 558 093.
  • the object of the present invention is to provide a coating system in which the laminar substrates such as, for example, labels can be fixed to and subsequently released from the table more easily and quickly.
  • the fixing of the substrates to the respective tables and their subsequent release take place by a simple pneumatic effect as a result of suitable activation of the selective connection means and without the need either for precise manipulation by the operators or for the use of additional mechanical locking devices.
  • the system of the invention thus has advantages in terms of a reduction in the usage of labour and in the risk of damage due to the manipulation of the laminar substrates.
  • a system ( Figure 1) for coating laminar substrates such as labels 10 with a layer of resin comprises an endless conveyor 12 along which there are arranged in series a resin-application station 14 and irradiation stations 16, 18 which can bring about cross-linking of the resin applied. Both the conveyor 12 and the stations 14, 16, 18 are of conventional type and are not therefore described in detail herein.
  • the conveyor 12 can transport a plurality of tables 20 to which the labels 10 to be coated with resin are fixed, as will be described in detail below.
  • Each table 20 has a structure formed ( Figures 2 and 3) by a lower plate 22 and by an upper plate 24 which has a plurality of holes 26 and can constitute a bearing surface 28 for the labels 10.
  • a peripheral frame 30 is interposed between the plates 22 and 24.
  • the plates 22, 24 and the frame define an internal cavity 32 which communicates with the outside atmosphere by means of a duct 34 formed in the frame 30 as well as by the holes 26 formed in the upper plate 24.
  • a honeycomb structure 36 disposed in the cavity 32 comprises a plurality of cells which are in communication with one another through holes 38 formed in their side walls.
  • a rotary vacuum distributor 40 located ( Figures 1 and 4) in the centre of the loop defined by the conveyor 12 has a disc 42, fixed to the central portion of the lower face of which is a tubular appendage 44, rotatably mounted in a sleeve 46 fixed to a support structure 48.
  • the lower end of the tubular appendage 44 is connected by means of a connector 50 and a pipe 52 to vacuum-generating means of known type, for example, a suction pump 54, while the upper end of the tubular appendage 44 communicates with a plurality of ducts 56 which extend radially towards the periphery of the disc 42.
  • each duct 56 is connected by means of a respective flexible pipe 58 to the duct 34 ( Figures 2 and 3) formed through the frame 30 of a respective table 20.
  • a respective shut-off valve 60 is mounted on each table 20 at the mouth of the duct 34.
  • Each shut-off valve 60 comprises ( Figure 3) a body 62 in which there is a duct 64 which puts the duct 34 into communication with the flexible pipe 58 and which can be shut off by a movable obturator 66.
  • an operator 68 places a plurality of labels 10 on the upper bearing surface 28 of the table 20 which stops in front of him at the time in question as a result of the stoppage of the conveyor 12.
  • the obturator 66 of the valve 60 of this table 20 is in the open position ( Figure 3) so that the suction pump 54, the pipe 52, the connector 50, the tubular appendage 44 of the disc 42, the duct 56 and the flexible pipe 58 associated with this table 20, as well as the duct 34 and the internal cavity 32 thereof, are all in free communication.
  • the suction effect exerted by the pump 54 is thus exerted through the holes 26 in the bearing surface of the table 20 with the consequence that, as soon as the labels 10 are laid on the table, they remain adhering thereto.
  • the operator 68 advances the conveyor 12 until the table 20 is at the station 14 where the labels 10 are coated with resin, and subsequently at the stations 16, 18 where the resin is cross-linked by irradiation.
  • the labels 10 remain adhering to the bearing surface 28 of the table 20 by virtue of the suction effect which is generated by the pump 54 and continues to be exerted.
  • the rotary mounting of the disc 42 of the distributor 40 in fact enables both the disc 42 and the flexible pipe 58 to follow the movement of the table 20 without the connection being lost between the suction pump 54 and the internal cavity 32 and the holes 26 in the table 20. Otherwise, the resin-application and cross-linking stages are substantially similar to those which take place in conventional systems.
  • the operator stops the conveyor 12 and causes the obturator 66 of the valve 60 to move to the shut-off position, shutting off communication between the suction pump 54 and the holes 26 in the table 20.
  • the coated labels 10 can thus be removed from the table 20 without encountering any resistance since no suction effect is exerted in the cavity 32 which is downstream of the valve 60.
  • the table 20 will now be in the starting condition again, so that a new working cycle similar to that just described can start.
  • the task of the operator 68 is thus greatly facilitated since it is limited essentially to the laying of the labels 10 to be coated on the tables 20 and the unloading of the coated labels, whilst the fixing of the labels 10 to the tables 20 and their subsequent release are achieved by a simple operation of the obturator 66 of the valve 60.
  • the productivity of the operator 68 is thus increased and the risks of damage to the labels 10 due to manipulation thereof in order to fix them to the tables 20 is reduced.

Landscapes

  • Coating Apparatus (AREA)
  • Replacement Of Web Rolls (AREA)
  • Collation Of Sheets And Webs (AREA)

Claims (9)

  1. System zur Beschichtung eines flächenhaften Substrats (10) mit einer Harzschicht, mit:
    einem Förderer (12),
    mindestens einem Tisch (20), der vom Förderer (12) transportiert werden kann und eine Lagerfläche (28), die mindestens ein entsprechendes flächenhaftes Substrat (10) tragen kann, sowie einen Innenhohlraum (32) aufweist, der mit der Lagerfläche (28) durch eine Mehrzahl von Löchern (26) in Verbindung steht,
    einer Station (14) zum Auftragen des Harzes auf das vom Tisch (20) getragene flächenhafte Substrat (10), wobei die Auftragsstation (14) längs des Förderers (12) angeordnet ist, und
    Vakuum-erzeugenden Mitteln (54),
    wobei das System dadurch gekennzeichnet ist, dass es Mittel zum selektiven Verbinden der Vakuum-erzeugenden Mittel mit dem Innenhohlraum (32) des Tischs. (20) aufweist, um zu bewirken, dass das flächenhafte Substrat (10) selektiv an der Lagerfläche (28) des Tischs (20) haftet.
  2. System nach Anspruch 1, dadurch gekennzeichnet, dass es eine Mehrzahl von Tischen (20) aufweist.
  3. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Fördereinrichtung (12) endlos ist.
  4. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der mindestens eine Tisch (20) einen Aufbau hat, der von einer unteren Platte (22) und einer oberen Platte (24) mit der Mehrzahl der Löcher (26) gebildet ist, und dass ein peripherer Rahmen (30) zwischen den Platten (22, 24) angeordnet ist, wobei die Platten (22, 24) und der Rahmen (30) den Innenhohlraum (32) begrenzen, der durch eine im Rahmen (30) gebildete Leitung (34) mit der Außenatmosphäre in Verbindung gesetzt wird.
  5. System nach Anspruch 4, dadurch gekennzeichnet, dass eine Bienenwabenstruktur (36) im Hohlraum (32) angeordnet ist und eine Mehrzahl von Zellen aufweist, die miteinander durch Löcher (38), die in ihren Seitenwänden gebildet sind, und mit der Außenseite durch die Löcher (26) in Verbindung stehen.
  6. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die selektiven Verbindungsmittel einen Rotations-Vakuum-Verteiler (40) mit einer Scheibe (42) aufweisen, an deren Unterseiten-Mittelteil ein rohrförmiger Ansatz (44) fixiert ist, der zwecks Drehung in einer festen Stützhülse (46) montiert ist, wobei das untere Ende des rohrförmigen Ansatzes (44) mit den Vakuum-erzeugenden Mitteln (54) verbunden ist und das obere Ende mit einer Vielzahl von Leitungen (56) in Verbindung steht, die sich radial zum Umfang der Platte (42) hin erstrecken.
  7. System nach Anspruch 6, dadurch gekennzeichnet, dass das radial äußere Ende jeder Leitung (56) mittels eines entsprechenden biegsamen Rohres (58) mit der Leitung (34) verbunden ist, die durch den Rahmen (30) eines zugehörigen Tisches (20) hindurch ausgebildet ist.
  8. System nach Anspruch 7, dadurch gekennzeichnet, dass an der Mündung der Leitung (34) ein jeweiliges Absperr-Ventil (60) vorgesehen ist, das einen Körper (62) aufweist, in dem sich eine Leitung (64) befindet, die die Leitung (34) mit dem biegsamen Rohr (58) in Verbindung setzt, und die durch ein bewegbares Absperrorgan (66) absperrbar ist.
  9. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es mindestens eine Station (16, 18) zum Bestrahlen des auf das flächenhafte Substrat (10) aufgebrachten Harzes aufweist, wobei die mindestens eine Bestrahlungsstation (16, 18) entlang der Fördereinrichtung (12) angeordnet ist.
EP97102835A 1996-02-23 1997-02-21 Einrichtung zur Beschichtung eines laminaren Substrates mit einer Harzlage Expired - Lifetime EP0791402B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO960121 1996-02-23
IT96TO000121A IT1285256B1 (it) 1996-02-23 1996-02-23 Impianto per rivestire con uno strato di resina substrati laminari

Publications (2)

Publication Number Publication Date
EP0791402A1 EP0791402A1 (de) 1997-08-27
EP0791402B1 true EP0791402B1 (de) 2001-10-24

Family

ID=11414289

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97102835A Expired - Lifetime EP0791402B1 (de) 1996-02-23 1997-02-21 Einrichtung zur Beschichtung eines laminaren Substrates mit einer Harzlage

Country Status (3)

Country Link
EP (1) EP0791402B1 (de)
DE (1) DE69707524T2 (de)
IT (1) IT1285256B1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3558093A (en) * 1969-07-29 1971-01-26 Epec Systems Corp Vacuum memory holding device
US4468017A (en) * 1982-05-07 1984-08-28 The Gerber Scientific Instrument Company Vacuum zone control valve
US4759310A (en) * 1986-05-19 1988-07-26 M/A-Com Government Systems, Inc. Automated system for reconditioning electrical terminals

Also Published As

Publication number Publication date
IT1285256B1 (it) 1998-06-03
EP0791402A1 (de) 1997-08-27
ITTO960121A0 (de) 1996-02-23
DE69707524T2 (de) 2002-05-02
ITTO960121A1 (it) 1997-08-23
DE69707524D1 (de) 2001-11-29

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