EP3656521B1 - Dispositif d'application d'émail en poudre pour la décoration de carreaux ou dalles céramiques - Google Patents

Dispositif d'application d'émail en poudre pour la décoration de carreaux ou dalles céramiques Download PDF

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Publication number
EP3656521B1
EP3656521B1 EP19202323.2A EP19202323A EP3656521B1 EP 3656521 B1 EP3656521 B1 EP 3656521B1 EP 19202323 A EP19202323 A EP 19202323A EP 3656521 B1 EP3656521 B1 EP 3656521B1
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EP
European Patent Office
Prior art keywords
enamel
slab
powder
aforementioned
decoration
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.)
Active
Application number
EP19202323.2A
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German (de)
English (en)
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EP3656521A1 (fr
Inventor
Ivano GIGLIOLI
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.)
Air Power Group SpA
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Air Power Group SpA
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Publication date
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Publication of EP3656521A1 publication Critical patent/EP3656521A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/04—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers
    • B28B11/044—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers with glaze or engobe or enamel or varnish
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C19/00—Apparatus specially adapted for applying particulate materials to surfaces
    • B05C19/04—Apparatus specially adapted for applying particulate materials to surfaces the particulate material being projected, poured or allowed to flow onto the surface of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/04—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers
    • B28B11/047—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers by pooring, e.g. curtain coating

Definitions

  • the present invention is part of the technical sector concerning the machinery used in the ceramic industry for the decoration of ceramic tiles or slabs.
  • the powder enamel is introduced into a hopper arranged above the conveyor line with which the ceramic tiles or slabs are advanced.
  • the hopper is extended transversely to the direction of feed, for example with a width equal to that of said tiles or ceramic slabs, and is inferiorly affected by a blade slit, suitably calibrated, from which emerges a so-called "dust curtain" which deposits on the underlying tile or ceramic slab in transit.
  • hoppers which provide, in correspondence with the blade slit, a battery of shutters intended to be selectively controlled by an electronic control unit, on the basis of a memorized mapping, to dispense dosed quantities of enamel having unit width equal to that of the shutter, or to prevent its exit.
  • a variant embodiment of the described solutions provides that the hopper deposits the powdered enamel on a mobile belt placed between the hopper itself and the underlying ceramic tile or slab; the same carpet then deposits on the latter, in a more downstream position.
  • European Patent No. EP 2 760 594 B1 from SACMI discloses a device for dispensing a loose solid material, comprising a series of vibrating elements arranged flanked to one another such as to restingly support the material, each of which is associated to a piezoelectric means which vibrates for causing fall of material from the vibrating elements.
  • the dispensing device also discloses heating means for heating the vibrating elements.
  • An object of the present invention is therefore to propose a powder enamel applicator device for the decoration of ceramic tiles or slabs which allows to overcome the technical limits of the known solutions and consequently increases the possibility of realizing designs or decorations of high complexity , with qualitatively optimal results.
  • Another object of the invention is to provide an applicator device with high reliability and operating precision, without requiring too frequent maintenance interventions.
  • Another object of the invention is to propose an applicator device in which there are no organs subject to the abrasive action of the enamel powder, so as to guarantee constant operating results over time and avoid expensive replacement of parts.
  • a further object of the invention provides that the applicator device is made with relatively simple technical solutions, which can be easily integrated into normal production lines both as regards assembly and operation.
  • a powder enamel applicator device for the decoration of ceramic tiles or slabs, with said powder enamel provided to reproduce a predetermined design or decoration, a variable quantity of the same powder enamel being intended to be deposited at selected portions of the surface of said ceramic tile or plate, with the latter moved horizontally along a conveyor line below said applicator device, which comprises:
  • reference number 1 indicates, as a whole, a powder enamel applicator device S for the decoration of ceramic tiles or slabs PL.
  • the powder enamel S must be suitably distributed, according to variable quantities, in correspondence with selected portions of the surface of said tile or ceramic slab PL, to reproduce a predetermined design or decoration D.
  • the ceramic tile or slab PL with the design or decoration D still in the powder state will be introduced, according to the known technique, into a baking oven (not shown), in which the powder enamel S will be melted and incorporated permanently in the material of the tile or PL ceramic slab, becoming a single body with it.
  • the applicator device 1 comprises dispensing means 2, which comprise a tray 20 for containing the powder enamel S.
  • the tray 20 is advantageously shaped like a hopper and is provided with a lower blade opening 21, extended transversely to the ceramic tile or slab PL, for the gravity release of the aforementioned powder enamel S.
  • the tray 20, and the relative lower blade opening 21, have a width preferably equal to that of the ceramic tile or slab PL ( Fig. 2 ).
  • a metering unit 3 in which a plurality of conveyor elements 30 are arranged, arranged side by side and oriented according to the transport direction F of said tile or ceramic slab PL, and able to define in their part above a mobile resting surface 31 of predefined width, preferably equal to or greater than those of the tray 20 as well as of the ceramic tile or slab PL.
  • the mobile resting surface 31 is intended to receive the powder enamel S released by the blade opening 21 of the tray 20, so that a layer H of said powder enamel S continuously forms.
  • Said layer H of powdered enamel S preferably, although not necessarily, has a uniform thickness.
  • the blade opening 21 is advantageously arranged a few millimeters above the mobile resting surface 31, so as to limit the outflow of the powder enamel S.
  • each of said conveyor elements 30 there are associated respective power members 32 ( Fig. 2A ), consisting for example of known electric stepper motors or the like, optionally provided with encoders, electronically controlled and capable of accurately performing rotations of amplitude predetermined angle, also very small.
  • power members 32 consisting for example of known electric stepper motors or the like, optionally provided with encoders, electronically controlled and capable of accurately performing rotations of amplitude predetermined angle, also very small.
  • the applicator device 1 also comprises an electronic processing unit 4, in which a drawing or decoration scheme D provided for the ceramic tile or slab PL is stored in digital form.
  • this drawing or decoration scheme D comprises a two-dimensional matrix, the entire surface of the aforementioned ceramic tile or slab PL is divided into cells C with a predetermined unit surface, and to each cell C is associated with an element of this matrix.
  • instructions relating to the presence or absence of enamel in the corresponding cell C, and possibly the quantity of enamel to be applied to the same, are recorded with appropriate coding.
  • the entire matrix therefore contains sufficient information to reproduce the predetermined design or decoration D on the entire PL tile or slab.
  • the applicator device 1 further comprises an actuation unit 5, electrically connected to the electronic processing unit 4 and controlled by it according to actuation sequences defined by a program residing therein, according to the aforementioned drawing or decoration scheme D.
  • the unit drive 5 is provided to operate, in a suitable phase relationship with the advancement of the conveyor line T, the power members 32 of each conveyor element 30 present in said metering unit 3, as better specified below.
  • the power members 32 can be activated simultaneously, to move all the conveyor elements 30 in a direction concordant with that of advancement of the same ceramic tile or slab PL, in a phase of formation of said layer H of enamel powder S, or selectively for imparting at least one conveyor element 30 a predetermined incremental advance, such that a metered quantity of powder enamel S is induced to fall, by gravity, onto the underlying ceramic tile or slab PL, in the underlying transit.
  • one or more longitudinal strips of said continuous layer H are made to advance more, by a predetermined quota, with respect to the front of the continuous layer H, until it exceeds the front limit of the mobile resting surface 31, so that predetermined quantities of enamel fall onto the ceramic tile or slab PL and, at the end of the phase, in each of the aforementioned cells C of the same, the quantity of enamel is deposited in powder S, with the necessary thickness, in accordance with the provisions of the aforementioned cell matrix for the realization of the predetermined design or decoration D ( Fig. 8 ).
  • each conveyor element 30 can be operated with adjustable speed, so as to deposit, in the unit of time, different quantities of enamel in powder form on the cell C of tile or slab PL.
  • the said plurality of conveyor elements 30 is constituted by a series of belts 33, wound in a closed loop on a respective pair of pulleys 34, 35.
  • Each belt 33 has a section such that its external side 33E is flat and of a width not exceeding that of one of the aforementioned cells C of the matrix ( Fig. 2A ).
  • the belts 33 are mutually close to each other in sufficient numbers to cover at least the width of said ceramic tile or slab PL, and their upper horizontal branches are adapted to define said mobile resting surface 31.
  • the relative electric motors 32 are associated with the downstream pulleys 35, and are preferably contained within them, without protruding laterally (see again Fig. 2A ).
  • a collection plate 36 is provided, positioned immediately below said upper horizontal branches of the belts 33, intended to retain any powder enamel S drawn between one belt 33 and the other avoiding the fall on the underlying PL ceramic tile or slab ( Fig. 1 ).
  • the said plurality of conveyor elements 30 is constituted by a drum 37 with a horizontal axis formed by disks 38 side by side and mutually close together, in sufficient number to cover at least the width of said ceramic tile or slab PL ( Fig. 4 ).
  • each disk 38 is not greater than the width of one of the aforementioned cells C of the matrix, while the mobile resting surface 31 is constituted by an upper portion of the circumference of said drum 37.
  • each disc 38 (not shown in the figures) is preferably contained within it, without protruding laterally.
  • an intermediate horizontal belt 6 is provided between the aforesaid metering unit 3 and the underlying ceramic tile or slab PL.
  • the intermediate belt 6 extends longitudinally for a length greater than or equal to that of the ceramic tile or slab PL, is provided with actuator means - not shown as having a known structure - independent of those which actuate the conveyor elements 30 and the conveyor line T, and is intended to be operated in advance in phase relation with the metering unit 3, to receive the entire design or decoration D constituted by the enamel powder S supplied by the same metering unit 3 on its upper branch 6S ( Fig. 5A ), then in phase relation with the transport line T of the ceramic tile or slab PL, to transfer said design or decoration D to the latter ( Fig. 5B ).
  • Fig. 6 schematically illustrates an optional divider unit 7, associated with the metering unit 3, with the latter indifferently of the type with belts 33 (as illustrated by way of example) or drum 37.
  • the partitioning device 7 is positioned in the area of the conveyor elements 30 where the aforementioned gravity fall of the enamel powder S takes place, and comprises at least one nozzle 70 for ejection of compressed air for each of said conveyor elements 30, which can be operated in relation to phase with the activation of the latter to reduce the amount of falling enamel powder S, directing an excess part Se towards a recovery tile 71 suitably arranged nearby.
  • the battery of nozzles 70 is arranged under the conveyor elements 30, in the space between these and the transiting tile or ceramic slab PL; the ejection of compressed air occurs towards the front with respect to the motion of the latter, and slightly upwards, so that said excess part of enamel powder S can be directed and collected by the aforementioned recovery tile 71.
  • a very advantageous aspect lies in the fact that the powdered enamel is not induced to pass through metering elements such as shutters and the like, necessarily of small if not very small dimensions, and therefore subject to clogging and wear, consequently high reliability and precision of operation, without requiring frequent maintenance.
  • the embodiments of the powder enamel applicator device are relatively simple for those skilled in the art, easy to construct and can be easily integrated into normal production lines, both as regards assembly and operation.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Finishing Walls (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (8)

  1. Dispositif applicateur d'émail en poudre (S) pour la décoration de carreaux ou dalles de céramique (PL), ledit émail en poudre (S) étant conçu pour reproduire un motif ou une décoration prédéterminé(e) (D), une quantité variable du même émail en poudre (S) étant destinée à être déposée sur des parties sélectionnées de la surface dudit carreau ou dalle de céramique (PL), ce dernier ou cette dernière étant déplacé(e) horizontalement le long d'une ligne de transport (T) sous ledit dispositif applicateur (1), dans lequel il inclut:
    - des moyens de distribution (2), munis d'un plateau (20) pour contenir ledit émail en poudre (S), au moins une ouverture de lame inférieure (21) étant prévue dans ledit plateau (20), qui s'étend transversalement au carreau ou à la dalle (PL) susmentionné(e) pour la libération de l'émail en poudre (S) susmentionné par gravité;
    - une unité de dosage (3), disposée en dessous desdits moyens de distribution (2) et dans laquelle sont prévus:
    - une pluralité d'éléments transporteurs (30), disposés côte à côte et orientés selon la direction de transport dudit carreau ou de ladite dalle céramique (PL), pour définir une surface de soutien mobile (31) de largeur prédéterminée dans leur partie supérieure, destinée à recevoir l'émail en poudre (S) libéré par lesdits moyens de distribution (2) pour former en continu une couche (H) dudit émail en poudre (S);
    - des éléments moteurs (32), associés à chacun desdits éléments transporteurs (30), qui sont configurés pour être activés sélectivement afin de communiquer une avance incrémentielle prédéterminée à l'élément transporteur relatif (30), de sorte qu'une quantité dosée de poudre d'émail (S) est induite à tomber, par gravité, sur le carreau ou la dalle de céramique sous-jacent (PL) en transit avec un mouvement convenablement synchronisé;
    - une unité de traitement électronique (4), dans laquelle un schéma correspondant audit motif ou à ladite décoration (D) pour ledit carreau ou ladite dalle (PL) est stocké sous forme numérique;
    - une unité d'actionnement (5), commandée par ladite unité de traitement électronique (4), configurée pour faire avancer a pas chaque élément de convoyeur (30) présent dans ladite unité de dosage (3), en relation de phase avec l'avancement du carreau ou de la dalle céramique (PL) mentionné(e), pour déposer sur la surface dudit carreau ou de ladite dalle céramique (PL) des quantités dosées d'émail en poudre (S), avec l'épaisseur nécessaire, conformément au schéma de motif ou de décoration (D) susmentionné.
  2. Dispositif applicateur selon la revendication 1, caractérisé en ce que ledit schéma de motif ou décoration (D) est représenté dans ladite unité de traitement électronique (4) sous la forme d'une matrice, dans laquelle la surface entière du carreau ou de la dalle céramique (PL) susmentionné(e) est divisée en cellules (C) de surface unitaire prédéterminée, dans chacune desquelles les instructions pour reproduire le motif ou la décoration (D) prédéterminé(e) susmentionné(e) sont enregistrées;
    la vitesse d'avancement de chaque éléments transporteurs (30) susmentionné étant définie de manière à ce que la quantité attendue de poudre d'émail (S) soit déposée dans chacune des cellules de surface unitaire (C) susmentionnées.
  3. Dispositif applicateur selon la revendication 1, caractérisé en ce que ladite pluralité d'éléments transporteurs (30) est constituée par une série de courroies (33), enroulées en une boucle fermée autour d'une paire respective de poulies (34, 35) mutuellement rapprochées et prévues en nombre suffisant pour couvrir au moins la largeur dudit carreau ou de ladite dalle céramique (PL), et en ce que ladite surface de soutien mobile (31) est constituée par les branches horizontales supérieures des courroies (33) susmentionnées.
  4. Dispositif applicateur selon la revendication 3, caractérisé en ce que lesdits éléments moteurs (32) sont associés à la poulie (35) en aval de chaque paire mentionnée, de sorte que la branche horizontale supérieure de la courroie (33) respective est tendue.
  5. Dispositif applicateur selon la revendication 1, caractérisé en ce que ladite pluralité d'éléments transporteurs (30) est constituée d'un tambour (37) avec un axe horizontal formé par des disques (38) disposés côte à côte et mutuellement proches les uns des autres, en un nombre suffisant pour couvrir au moins la largeur dudit carreau ou de ladite dalle céramique (PL), en ce que ladite surface de soutien mobile (31) est constituée par une partie supérieure de la circonférence dudit tambour (37), et en ce que lesdits éléments moteurs (32) sont associés à chacun des mêmes disques (38).
  6. Dispositif d'application selon la revendication 1, caractérisé en ce que entre l'unité de dosage (3) susmentionnée et le carreau ou la dalle céramique (PL) sous-jacent(e), il y a une courroie intermédiaire (6) disposée horizontalement, équipée d'éléments d'actionnement indépendants de ceux qui actionnent lesdits éléments transporteurs (30) et ladite ligne de transport (T), ladite courroie intermédiaire (6) s'étendant longitudinalement sur une longueur supérieure ou égale à celle dudit carreau ou de ladite dalle céramique (PL), destinée à être actionnée d'abord à l'avance, en relation de phase avec ladite unité de dosage (3), pour recevoir l'ensemble du motif ou de la décoration (D) constitué de la poudre d'émail (S) fournie par le même moyen de distribution (2) sur sa branche supérieure (6S), et ensuite en relation de phase avec la ligne de transport (T) susmentionnée du carreau ou de la dalle céramique (PL), pour transférer ledit motif ou ladite décoration (D) sur ce dernier.
  7. Dispositif applicateur selon la revendication 3, caractérisé en ce que il fournit une plaque de collecte (36), positionnée immédiatement en dessous desdites branches horizontales supérieures des courroies (33) définissant la surface de soutien mobile susmentionnée (31), destinée à retenir tout émail en poudre (S) tiré entre une courroie et l'autre, en évitant leur dépôt sur le carreau ou la dalle céramique sous-jacente (PL).
  8. Dispositif applicateur selon la revendication 1, caractérisé en ce que dans ladite unité de dosage (3) il y a un dispositif de séparation (7), associés à chacun desdits éléments transporteurs (30), dans la zone de ceux-ci où la chute par gravité mentionnée de la quantité dosée d'émail en poudre a lieu, avec ledit dispositif de cloisonnement (7) équipé d'au moins une buse (70) pour l'éjection d'air comprimé pour chacun desdits éléments transporteurs (30), qui peut être activée en relation de phase avec l'activation de ces derniers pour réduire la quantité de poudre d'émail tombant (S), et pour diriger une partie en excès (Se) vers un carreau de récupération (71) placé de manière appropriée à proximité.
EP19202323.2A 2018-10-09 2019-10-09 Dispositif d'application d'émail en poudre pour la décoration de carreaux ou dalles céramiques Active EP3656521B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000009274A IT201800009274A1 (it) 2018-10-09 2018-10-09 Dispositivo applicatore di smalto in polvere per la decorazione di piastrelle o lastre ceramiche

Publications (2)

Publication Number Publication Date
EP3656521A1 EP3656521A1 (fr) 2020-05-27
EP3656521B1 true EP3656521B1 (fr) 2022-08-24

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EP19202323.2A Active EP3656521B1 (fr) 2018-10-09 2019-10-09 Dispositif d'application d'émail en poudre pour la décoration de carreaux ou dalles céramiques

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EP (1) EP3656521B1 (fr)
ES (1) ES2929446T3 (fr)
IT (1) IT201800009274A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112372810B (zh) * 2020-10-13 2021-12-31 江苏中清光伏科技有限公司 一种瓷瓶自动涂釉装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH329122A (fr) * 1955-10-17 1958-04-15 Changewood Corp Procédé pour déposer des éléments fibreux sur une surface, et appareil pour la mise en oeuvre de ce procédé
ITRE20110073A1 (it) * 2011-09-26 2013-03-27 Sacmi Dispositivo per l'erogazione di materiale solido incoerente

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IT201800009274A1 (it) 2020-04-09
ES2929446T3 (es) 2022-11-29
EP3656521A1 (fr) 2020-05-27

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