EP0715898A1 - A machine for painting ceramic tiles - Google Patents

A machine for painting ceramic tiles Download PDF

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Publication number
EP0715898A1
EP0715898A1 EP95203294A EP95203294A EP0715898A1 EP 0715898 A1 EP0715898 A1 EP 0715898A1 EP 95203294 A EP95203294 A EP 95203294A EP 95203294 A EP95203294 A EP 95203294A EP 0715898 A1 EP0715898 A1 EP 0715898A1
Authority
EP
European Patent Office
Prior art keywords
chamber
machine
semi
dispensing device
paint
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Withdrawn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
EP95203294A
Other languages
German (de)
English (en)
French (fr)
Inventor
Giuseppe Ferrari
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.)
OFFICINE SMAC SpA
Original Assignee
OFFICINE SMAC 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 OFFICINE SMAC SpA filed Critical OFFICINE SMAC SpA
Publication of EP0715898A1 publication Critical patent/EP0715898A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0813—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for supplying liquid or other fluent material to the roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/085—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
    • B05B12/087—Flow or presssure regulators, i.e. non-electric unitary devices comprising a sensing element, e.g. a piston or a membrane, and a controlling element, e.g. a valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/1418—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet for supplying several liquids or other fluent materials in selected proportions to a single spray outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/32—Shielding elements, i.e. elements preventing overspray from reaching areas other than the object to be sprayed
    • B05B12/36—Side shields, i.e. shields extending in a direction substantially parallel to the spray jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0463—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length
    • B05B13/0468—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length with reciprocating or oscillating spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2489—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
    • B05B7/2497—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device several liquids from different sources being supplied to the discharge device
    • 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
    • B28B11/046—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers by rolling

Definitions

  • the invention concerns a machine for decorating ceramic tiles, that is, a set of devices for applying a layer of liquid or powdery glaze to decorate the top face of ceramic items.
  • the prior art comprises spray gun, or aerograph, painting machines in which, inside a painting enclosure through which passes a conveyor line, the paint is sprayed directly onto the top face of said tiles, whereupon the decorated items are sent to the ovens to be fired.
  • anomalies can arise that are associated with the change in the colour of the paint; such anomalies arising mainly due to the difficulty in achieving a sharp change in the colour, and of avoiding undesirable mixing of two or more types of paint where this is not required.
  • the invention resolves the said technical problem by adopting a painting machine comprising a dispensing device for liquid paint connected with a feed chamber into which lead a plurality of supply ducts for various kinds of paint; immediately upstream of the said feed chamber, on each paint supply duct there being, advantageously, a pneumatic valve to control the flow of the paint.
  • liquid paint to be dispensed optimally, particularly as regards polychromatic decorations, with the possibility of keeping paints of various colours, or kinds, completely separate, dispensed in successive time intervals, without undesirable chromatic contamination, or alterations.
  • each pneumatic valve is provided with a chamber divided into two semi-chambers, one front semi-chamber and one rear semi-chamber, between which there is an elastically deformable sealing membrane: the front semi-chamber having an inlet opening and an outlet opening for the ceramic paint, the rear semi-chamber having a passage for a pressurised working fluid that moves the sealing membrane from a neutral position, to allow the flow of the paint in the chamber from the said inlet opening to the said outlet opening, to an active position, in contact with the inlet opening for the paint to block its flow.
  • the said inlet opening of the paint is located in a central position in the paint feed front semi-chamber, whereas the said outlet opening is made in a position corresponding with that of an annular cavity in the bottom of the said semi-chamber.
  • the present invention can be applied advantageously to all types of painting machines for ceramic tiles that use liquid paint, for example, in aerograph painting machines, where the nebulized paint is sprayed directly onto the underlying items transiting on the conveyor line, or also in roller printing machines, with the projection of the paint onto a feeder roller in tangential contact with a printing roller.
  • the dispensing device for the ceramic paint can be fixed, or supported so that it may oscillate, or else, so that it may slide in a transverse direction with respect to the said feeder roller.
  • the paint In the version with the fixed, or oscillating, dispenser device it is preferable for the paint to be supplied in the form of tiny drops, for example, by means of a nebulizing aerograph, whereas, in the version with mobile dispenser, the paint can be dispensed in the form of a jet.
  • Figure 1 is a schematic side view of a painting machine with a spray painting device
  • Figure 2 is a partial, interrupted top view of Figure 1
  • Figure 3 is cross section III-III, greatly enlarged and interrupted, of Figure 2
  • Figure 4 is a schematic side view of a painting machine with the paint spray directed onto a dosing roller in a cascade of rollers of a roller printing machine for tiles
  • Figure 5 is the front view of Figure 4, showing a trolley supporting the spraying unit
  • Figure 6 is a side view as in Figure 4, but relative to a painting machine for the roller printing of ceramic articles with the paint being dispensed in the form of a non nebulized jet.
  • a painting machine 1 as described in the present invention, comprises a casing 2, in the form of a tunnel defining a painting enclosure, provided, in its lower part, with a pair of conveyor belts 3 for the ceramic objects 4, generally tiles, and with openings at the ends to allow the entry and exit of the tiles 4, respectively, into and out of the painting enclosure 2.
  • an opening 6 is made for the coupling in it of an aerographic nebulizer dispensing device 7 for a decorating fluid, such as a ceramic paint, in particular a pneumatic nebulizer, having a nebulizer nozzle 8 attached to the lower part of the body of a manifold 9 coupled to a cross-beam 10 fixed to the sides of the opening 6, the said manifold body being coupled to the said cross-beam by hinging devices, comprising a pin 11, that co-operate with a oscillator unit not shown, that enable the dispensing device 7 to oscillate in the direction indicated by the arrow F between end positions indicated with dotted lines in Figure 1, so as to decorate the entire width of the tile.
  • a decorating fluid such as a ceramic paint, in particular a pneumatic nebulizer
  • Supply ducts 12 for a plurality of ceramic paints are coupled to the manifold 9 via respective pneumatic control valves 13: the various ceramic paints being fed through the ducts 12 under pressure by feeder devices not shown.
  • Each pneumatic control valve 13 has a compressed air supply line 14, on which there is a relative solenoid cut-off valve 15.
  • the manifold body 9 has inside it a feed chamber 16 communicating, through passages 16a, with the control valves 13 via connecting ducts 12a: the said feed chamber enables the liquid paint to flow towards the nozzle 8 and, possibly, to be mixed with the paint flowing out of at least one other duct 12a in predetermined proportions, so as to create a plurality of chromatic effects on the tile 4.
  • Each said control valve 13 comprises a valve body 17 subdivided in two parts by a sealing membrane 18, held between them so that it is floating inside a control chamber divided in a front semi-chamber 19 and a rear semi-chamber 20: the front semi-chamber 19 having an annular cavity 21, the rear semi-chamber 20 being preferably defined by a recess 22.
  • the supply duct 12 joins to the front semi-chamber 19 through an inlet opening 23 located in a central position in the front semi-chamber, the annular cavity 21 communicating with an outlet opening 24 for the paint.
  • the rear semi-chamber 20 has a hole 25 for the passage through it of compressed air, whose flow is controlled by valve 15 upstream of the pneumatic supply line 14.
  • the cut-off valve 15 for example operated by a programmed data processor, not shown, is made to open to enable the passage of compressed air towards control valve 13, the membrane 18 is pushed against the opening of the inlet duct 23 for the ceramic paint and prevents it from flowing towards the manifold 9; when the flow of compressed air is cut off by the compressed air flow cut-off valve 15, the paint can enter into the semi-chamber 19, elastically deforming the membrane 18, and exit through opening 24 to arrive at the feed chamber 16 and to flow out of the nozzle 8.
  • Two compressed air supply ducts 26, 27 are also coupled to the nozzle 8, to nebulize the jet 28 of paint by means of converging streams of air 29.
  • the nebulizer device 7 can be supported on a sliding trolley 32, guided, by bilateral rolling elements 33, on a transverse runner 34 supported by the frame 35 of the painting machine 30: the trolley being coupled to driving devices 36 supported by the frame 35.
  • a distributor 37 supplying the ceramic paint by means of a dispensing nozzle 38 in the form of a jet, analogous to the nebulizing device 7, shown previously, but without the streams of compressed air 28, 29 for nebulizing the jet of paint.
  • the distributing roller 30b can even be coupled directly to the printing roller 30c, this last one possibly being coupled to a uniforming roller 30e for the paint on the printing roller.
  • the number of supply ducts for the ceramic paint leading to each feed chamber of the manifold body can be chosen in function of the number of colours, or kinds of paint, required by the type of design envisaged for the tile.

Landscapes

  • 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)
  • Nozzles (AREA)
EP95203294A 1994-12-09 1995-11-30 A machine for painting ceramic tiles Withdrawn EP0715898A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMO940163A IT1269277B (it) 1994-12-09 1994-12-09 Macchina per la decorazione a smalto di piastrelle ceramiche
ITMO940163 1994-12-09

Publications (1)

Publication Number Publication Date
EP0715898A1 true EP0715898A1 (en) 1996-06-12

Family

ID=11385738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95203294A Withdrawn EP0715898A1 (en) 1994-12-09 1995-11-30 A machine for painting ceramic tiles

Country Status (2)

Country Link
EP (1) EP0715898A1 (it)
IT (1) IT1269277B (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999028041A3 (en) * 1997-12-01 1999-07-22 Minnesota Mining & Mfg Apparatus and method of atomizing and vaporizing
IT201700033389A1 (it) * 2017-03-27 2018-09-27 Cementhai Ceram Co Ltd Sistema e metodo di erogazione di una miscela fluida o smalto per la realizzazione o la stampa di manufatti dell'industria della ceramica, in particolare piastrelle ceramiche
ES2932324R1 (es) * 2021-06-24 2023-01-30 Smartjet S R L Aparato de distribucion de un producto liquido sobre una superficie de objetos y sistema de produccion de baldosas que comprende dicho aparato de distribucion

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108943348B (zh) * 2018-08-20 2024-06-04 佛山市赛普飞特科技有限公司 一种使用陶瓷粉料的数码打印设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703880A (en) * 1970-05-06 1972-11-28 Libbey Owens Ford Co Spray coating apparatus
US3799716A (en) * 1972-06-23 1974-03-26 Crowe Gulde Inc Apparatus for manufacture of coated bricks
FR2334427A1 (fr) * 1975-12-09 1977-07-08 Renault Bloc multibuses de pulverisation de surfaces d'outillages
EP0248985A2 (de) * 1986-06-10 1987-12-16 Billhöfer Maschinenfabrik GmbH Beschichtungswerk für Lackiermaschinen
FR2666052A1 (fr) * 1990-08-21 1992-02-28 Brault Benoit Dispositif et procede de decoration de materiaux ceramiques.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703880A (en) * 1970-05-06 1972-11-28 Libbey Owens Ford Co Spray coating apparatus
US3799716A (en) * 1972-06-23 1974-03-26 Crowe Gulde Inc Apparatus for manufacture of coated bricks
FR2334427A1 (fr) * 1975-12-09 1977-07-08 Renault Bloc multibuses de pulverisation de surfaces d'outillages
EP0248985A2 (de) * 1986-06-10 1987-12-16 Billhöfer Maschinenfabrik GmbH Beschichtungswerk für Lackiermaschinen
FR2666052A1 (fr) * 1990-08-21 1992-02-28 Brault Benoit Dispositif et procede de decoration de materiaux ceramiques.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999028041A3 (en) * 1997-12-01 1999-07-22 Minnesota Mining & Mfg Apparatus and method of atomizing and vaporizing
US6012647A (en) * 1997-12-01 2000-01-11 3M Innovative Properties Company Apparatus and method of atomizing and vaporizing
KR100522648B1 (ko) * 1997-12-01 2005-10-19 미네소타 마이닝 앤드 매뉴팩춰링 캄파니 분무 및 기화 장치 및 방법
IT201700033389A1 (it) * 2017-03-27 2018-09-27 Cementhai Ceram Co Ltd Sistema e metodo di erogazione di una miscela fluida o smalto per la realizzazione o la stampa di manufatti dell'industria della ceramica, in particolare piastrelle ceramiche
WO2018178813A1 (en) * 2017-03-27 2018-10-04 Cementhai Ceramics Co., Ltd. Dispensing system and method for dispensing a slurry or glaze to build or print products of the ceramics industry, in particular ceramic tiles
ES2932324R1 (es) * 2021-06-24 2023-01-30 Smartjet S R L Aparato de distribucion de un producto liquido sobre una superficie de objetos y sistema de produccion de baldosas que comprende dicho aparato de distribucion

Also Published As

Publication number Publication date
IT1269277B (it) 1997-03-26
ITMO940163A1 (it) 1996-06-09
ITMO940163A0 (it) 1994-12-09

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