EP0444730B1 - Schieber zur Zweistufenbefüllung von Keramikformen, insbesondere zur Herstellung druckglasierter Keramikplatten - Google Patents

Schieber zur Zweistufenbefüllung von Keramikformen, insbesondere zur Herstellung druckglasierter Keramikplatten Download PDF

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Publication number
EP0444730B1
EP0444730B1 EP91200186A EP91200186A EP0444730B1 EP 0444730 B1 EP0444730 B1 EP 0444730B1 EP 91200186 A EP91200186 A EP 91200186A EP 91200186 A EP91200186 A EP 91200186A EP 0444730 B1 EP0444730 B1 EP 0444730B1
Authority
EP
European Patent Office
Prior art keywords
loader
clay
glaze
masking element
cavity
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
EP91200186A
Other languages
English (en)
French (fr)
Other versions
EP0444730A3 (en
EP0444730A2 (de
Inventor
Ermes Bigi
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.)
L B Officine Meccaniche SpA
Original Assignee
L B Officine Meccaniche 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 L B Officine Meccaniche SpA filed Critical L B Officine Meccaniche SpA
Publication of EP0444730A2 publication Critical patent/EP0444730A2/de
Publication of EP0444730A3 publication Critical patent/EP0444730A3/en
Application granted granted Critical
Publication of EP0444730B1 publication Critical patent/EP0444730B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
    • B28B13/022—Feeding several successive layers, optionally of different materials

Definitions

  • This invention relates generally to the manufacture of pressure-glazed tiles, and in particular to a service carriage for loading ceramic moulds with the materials required for forming said pressure-glazed tiles, and similar products.
  • the forming method known as pressure glazing has been known for some time in the field of ceramic tile production.
  • Said two carriages are arranged to slide forwards and rearwards as stated.
  • the clay carriage firstly slides forwards while the glaze carriage remains at rest in the retracted position.
  • the clay carriage then moves rearwards to level off the clay present in the mould cavities, after which the lower mould punches are lowered through a predetermined distance, the glaze carriage then being enabled to advance to fill the upper regions of said cavities, which are free by virtue of the lowering of the punches.
  • a double-loading carriage having a first loader for atomized clay and a second loader for powdered glaze placed in front of the first loader.
  • the two loaders are acted indipendently by separate motors and are pushed in sequence over the mould cavity in order to discharge the material therein in synchrony with the lowering of the mould punch.
  • the main object of the present invention is to overcome the aforesaid problems within the context of a constructionally simple solution of small overall size.
  • the carriage in question comprises a clay loader driven with horizontal outward and return movement relative to at least one forming cavity of an underlying ceramic mould, and provided at its front with a perforated element which distributes the powdered glaze and is upperly associated with a loader for this glaze.
  • Said glaze loader is arranged to slide parallel to said distributor while this latter is temporarily stationary, lying above said at least one forming cavity in which the clay has been previously deposited.
  • the ceramic press is able to operate at practically double the rate obtainable in the initially described known art.
  • the invention is of small overall size.
  • said glaze distributor which consists of a horizontal flat plate or masking element, is provided with an aperture of dimensions practically equal to those of said at least one cavity, whereas according to other embodiments said plate comprises one or more apertures of any shape but having a total surface area less than that of the cavity.
  • the die 2 of a ceramic mould which is shown schematically as it can be of any known type. It can be for example of the entering punch type, of the so-called "inverted mirror” type, or of the type in which the tile forming takes place in the upper part of the mould (indicated by 22 in Figure 1), which is arranged on the moving cross-member of the press 1.
  • each forming cavity 20 is lowerly delimited by a lower forming punch 21, which moves in height relative to the die 2 as described hereinafter.
  • the invention is particularly but not exclusively suitable for the manufacture of pressure-glazed tiles, the starting materials for which are introduced into the cavities 20 as will be apparent hereinafter.
  • the first material consisting (for example) of atomized clay (indicated by 66 in Figures 3A to 3C)
  • a respective hopper 60 Figures 1, 2
  • the second material consisting (for example) of powdered glaze (indicated by 77 in Figures 3A to 3C)
  • a corresponding hopper 70 located adjacent to the preceding, on the side facing the press 1 ( Figure 1).
  • Said two feed hoppers 60 and 70 for the atomized clay (or other material) and powdered glaze (or other material) respectively, are arranged transversely to an underlying structure 3 which is fixed to the press base 10 and on which the carriage of the invention is slidingly mounted.
  • the operating unit for said carriage is housed in a casing 4 supported by the structure 3 and positioned on the opposite side of the hopper 60 to that occupied by the hopper 70 (see Figures 1, 2).
  • Said operating unit is not shown as it is of known type, consisting for example of a device of the connecting rod-crank or other equivalent type, which unit can however be differently positioned from that shown, for example within the structure 3.
  • the hopper 70 can contain either a single type of powdered glaze, different powdered glazes not completely mixed together but in any event compatible, clay mixed with one or more glazes, or other materials used in the ceramics field to give the tiles particular aesthetic characteristics.
  • the carriage of the invention comprises a clay loader 5 which in the illustrated case consists of a mesh of mutually perpendicular plates, although there is nothing to prevent only transverse plates being used.
  • a glaze loader 78 consisting essentially of a small hopper caused to slide forwards and rearwards by convenient means (not shown), in a horizontal direction parallel to the sliding direction of the loader 5.
  • Two usual transverse scrapers 8 and 9 are provided to remove the clay and glaze respectively from the upper face of the die during the rearward movement of the carriage.
  • a rotary transverse cylindrical brush 10 for cleaning the upper punches (not shown) for forming the exposed face of the tiles 67 and a pusher 11 to push the formed tiles 67 from the die 2 towards a removal conveyor 12.
  • the invention operates as follows. On termination of a pressing stage the lower punches 21 (which were previously lowered onto the base of the press) are raised to the level of the die 2, after which the carriage (which had previously been moved completely rearwards, ie to the right in Figures 1 and 2), receives the enabling signal to move forwards. During this forward movement the loader 78 remains in its previously occupied position, such as that shown, and when the pusher 11 has removed the tiles from the punches 21 these latter receive the enabling signal to move downwards into a predetermined position, such as that of Figure 3A.
  • said predetermined position is known to depend on many factors, such as the thickness of the formed tile, the clay moisture content, its particle size, the ratio of finer particles to coarser particles, type of loading and other factors, as is well known to the expert of the art.
  • the loader 5 deposits clay 66 into the cavity 20, after which the carriage moves rearwards and the scraper 8 ( Figure 1) levels off said clay 66 as shown in Figure 3A.
  • the punches 21 are then lowered into the position shown in Figure 3B, which obviously depends on the layer of glaze to be deposited on the clay 66, this lowering being done before the masking element 6 halts (temporarily) in the position shown in said Figure 3B, with the apertures 7 concentric with the cavities 20.
  • the loader 78 slides towards the pusher 11, with simultaneous depositing of the glaze 77 on the clay 66 and inside the apertures 7, said loader 78 then halting at the front end of the masking element 6.
  • the lower punches 21 are then lowered against the base 10 ( Figures 1, 3C), after which the carriage is moved to the end of its rearward path, to the right in Figure 1, the scraper 9 thus cleaning the upper face of the die 2.
  • the pressing stage then takes place, followed by the raising of the punches 21 to the level of the die 2, after which the cycle is repeated identically.
  • the loader 78 can undergo either half of its travel per loading cycle or total outward/return travel, depending on the capacity of the loader 78 and the quantity of glaze to be deposited on the clay.
  • the loader 78 can arrive below the hopper 70 (to receive glaze) either every two loading cycles or every loading cycle.
  • the relative pressure-glazed tiles 67 comprise a uniform layer of glaze 77 or mixture of glazes.
  • said shapes of said partial (or incomplete) layers can obviously vary, as can their thickness, which is determined by the thickness of the masking element 6 and the extent to which the punches 21 are lowered before the glaze 77 is deposited on the clay 66 ( Figure 2B).
  • said masking element represents a sort of silk-screen stencil for powdered glaze.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Casting Devices For Molds (AREA)

Claims (4)

  1. Wagen zur Zweistufenbefüllung von Keramikformen im allgemeinen, mit:
    - einer Einfülleinrichtung (5) für zerstäubten Lehm oder einen anderen Werkstoff, welche in einer Richtung nach außen und wieder zurück bezüglich wenigstens einem formenden Hohlraum (20) einer darunterliegenden Keramikform bewegbar ist, und welche derart angeordnet ist, daß der Lehm in den wenigstens einen formenden Hohlraum während der nach außen führenden Bewegung entladbar ist,
    gekennzeichnet durch
    - ein ebenes perforiertes Abdeckglied (6) zum Verteilen einer pulverförmigen Glasur oder eines anderen Werkstoffes, welches vor der Einfülleinrichtung für Lehm befestigt und auf dem Niveau der Öffnung des wenigstens einen formenden Hohlraumes angebracht ist, und
    - eine Einfülleinrichtung (78) für eine pulverförmige Glasur (77) oder einen anderen Werkstoff, welche verschiebbar über dem perforierten Abdeckglied (6) angeordnet ist, durch welche sie normalerweise während der nach außen und wieder zurückführenden Bewegung der Einfülleinrichtung für Lehm verschlossen ist;
    - die Einfülleinrichtung für die Glasur ist derart angeordnet, daß sie relativ zu dem Abdeckglied bewegbar ist, während letzteres zeitweilig über dem wenigstens einen Hohlraum während der Rückbewegung der Einfülleinrichtung für Lehm stillsteht, um die Glasur auf den darunterliegenden Lehm über das Abdeckglied aufzubringen.
  2. Wagen nach Anspruch 1,
    dadurch gekennzeichnet, daß das Abdeckglied (6) einen ebenen Körper aufweist, welcher mit einer Anzahl von Öffnungen (7) versehen ist, wobei die Anzahl der Öffnungen (7) der Anzahl der formenden Hohlräume der Form entspricht, wobei jede einzelne Öffnung dieselbe geometrische Form wie der jeweilige Hohlraum aufweist, mit Abmessungen, welche ein wenig geringer als die der letztgenannten sind oder diesen entsprechen.
  3. Wagen nach Anspruch 1,
    dadurch gekennzeichnet, daß für jeden einzelnen formenden Hohlraum (20) das Abdeckglied (6) wenigstens eine Öffnung enthält, welche die gleiche geometrische Form wie der Hohlraum aufweisen kann oder nicht, und wobei die Öffnung einen Gesamtoberflächenbereich aufweist, welcher kleiner ist als der des Hohlraumes.
  4. Keramikform, die mit einem Wagen zur Zweistufenbefüllung versehen ist, nach Anspruch 1 bis 3.
EP91200186A 1990-02-26 1991-01-30 Schieber zur Zweistufenbefüllung von Keramikformen, insbesondere zur Herstellung druckglasierter Keramikplatten Expired - Lifetime EP0444730B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT46815A IT1239147B (it) 1990-02-26 1990-02-26 Carrello a doppio caricamento per stampi ceramici in genere, tipicamente per la fabbricazione di piastrelle pressosmaltate.
IT4681590 1990-02-26

Publications (3)

Publication Number Publication Date
EP0444730A2 EP0444730A2 (de) 1991-09-04
EP0444730A3 EP0444730A3 (en) 1991-11-27
EP0444730B1 true EP0444730B1 (de) 1996-06-05

Family

ID=11259095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91200186A Expired - Lifetime EP0444730B1 (de) 1990-02-26 1991-01-30 Schieber zur Zweistufenbefüllung von Keramikformen, insbesondere zur Herstellung druckglasierter Keramikplatten

Country Status (5)

Country Link
EP (1) EP0444730B1 (de)
AT (1) ATE138844T1 (de)
DE (1) DE69119932T2 (de)
ES (1) ES2087959T3 (de)
IT (1) IT1239147B (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1257499B (it) * 1992-05-07 1996-01-25 Mass Spa Stampo per la formatura di materiali ceramici, tipicamente piastrelle pressosmaltate, e relativi mezzi di carico
IT1268838B1 (it) * 1994-07-21 1997-03-13 L B Engineering Srl Attrezzatura per alimentare il carrello di carico dello stampo nella fabbricazione di piastrelle ceramiche
IT1280079B1 (it) * 1995-07-20 1997-12-29 Emilceramica S P A Carrello a doppio caricamento per stampi ceramici per la formatura di piastrelle smaltopressate e monopressate a piu' strati.
IT1287758B1 (it) * 1996-07-30 1998-08-18 Ceramiche Dual Srl Sistema di caricamento degli stampi delle presse ceramiche per la formatura di piastrelle pressosmaltate, e relativi mezzi di attuazione
IT1290358B1 (it) * 1997-02-18 1998-10-22 Gruppo Concorde Spa Macchina per la formatura e pressatura di polveri particolarmente per la produzione di piastrelle ceramiche nonche' procedimento per la
IT1290692B1 (it) * 1997-02-21 1998-12-10 Sacmi Procedimento per il trasferimento di polvere ceramica da una zona di prelievo in una di utilizzo.
IT1292873B1 (it) * 1997-04-23 1999-02-11 Sacmi Apparecchiatura per la pressatura di piastrelle ceramiche a due strati
IT1294941B1 (it) * 1997-08-01 1999-04-23 Ariostea S P A Sistema di caricamento degli stampi delle presse per la formatura di piastrelle e relativi mezzi di attuazione.
IT1297755B1 (it) * 1997-10-14 1999-12-20 L B Engineering S R L Ora Lb O Attrezzatura e metodo per alimentare con materiale in polvere o granulare, la cavita' dello stampo, nella fabbricazine di piastrelle
IT1295622B1 (it) * 1997-10-16 1999-05-14 Catia Corti Metodo per la formazione ed il decoro di piastrelle ceramiche crude a monte della pressa ed impianto per l'attuazione del metodo.
ITRE20010123A1 (it) * 2001-12-20 2003-06-20 Lb Officine Meccaniche Spa Carrello ceramico a doppio caricamento
ITFI20020071A1 (it) * 2002-04-29 2003-10-29 Gruppo Concorde Spa Dispositivo per il caricamento di stampi in una pressa per la produzione di piastrelle
ES2472140B2 (es) 2014-02-07 2015-01-29 Kerajet S.A. Método de proyección de sólidos sobre una superficie
ES2562342A1 (es) * 2014-09-03 2016-03-03 Asitec Ceramic, S.L. Bancada de la unidad de alimentación de una prensa de conformación de piezas cerámicas de recubrimiento

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1076013B (de) * 1958-12-13 1960-02-18 Rheinische Gehwegplattenfabrik Einrichtung an Fertigungsmaschinen fuer Gehwegplatten u. dgl.
DE1182572B (de) * 1960-05-14 1964-11-26 Albertwerke Klingenberg Fuellvorrichtung an Pressen zur Herstellung mehrfarbiger keramischer Platten, wie sogenannter geflammter Fliesen od. dgl.
NL6707021A (nl) * 1967-05-22 1968-11-25 Mosa Porselein & Tegelfab Werkwijze en inrichting voor het persen van meerlaagstegels
DE1946989C3 (de) * 1969-09-17 1974-11-28 Laeis-Werke Ag, 5500 Trier Füllvorrichtung für die Herstellung von Zweischichtfliesen in Pressen
NL8701601A (nl) * 1987-07-08 1989-02-01 Mosa Koninkl Bv Set vloertegels, werkwijze voor het vervaardigen van een vloertegel behorende tot de set en inrichting voor het uitvoeren van de werkwijze.

Also Published As

Publication number Publication date
ES2087959T3 (es) 1996-08-01
ATE138844T1 (de) 1996-06-15
EP0444730A3 (en) 1991-11-27
IT9046815A1 (it) 1991-08-26
IT1239147B (it) 1993-09-28
EP0444730A2 (de) 1991-09-04
DE69119932T2 (de) 1996-10-24
DE69119932D1 (de) 1996-07-11
IT9046815A0 (it) 1990-02-26

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