EP0839618B1 - Dispositif d'alimentation d'argile pour presses destinées à la fabrication de carreaux en céramique - Google Patents

Dispositif d'alimentation d'argile pour presses destinées à la fabrication de carreaux en céramique Download PDF

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Publication number
EP0839618B1
EP0839618B1 EP97202984A EP97202984A EP0839618B1 EP 0839618 B1 EP0839618 B1 EP 0839618B1 EP 97202984 A EP97202984 A EP 97202984A EP 97202984 A EP97202984 A EP 97202984A EP 0839618 B1 EP0839618 B1 EP 0839618B1
Authority
EP
European Patent Office
Prior art keywords
plate
receiver
loading
carriage
powder
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
EP97202984A
Other languages
German (de)
English (en)
Other versions
EP0839618A1 (fr
Inventor
Ivanno L.B.-Officine Meccaniche-S.p.A. Ligabue
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.)
Lb - Officine Meccaniche-Spa
Original Assignee
Lb - Officine Meccaniche-Spa
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Filing date
Publication date
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Publication of EP0839618A1 publication Critical patent/EP0839618A1/fr
Application granted granted Critical
Publication of EP0839618B1 publication Critical patent/EP0839618B1/fr
Anticipated expiration legal-status Critical
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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 to the means for loading presses for forming ceramic flooring and facing tiles.
  • Modern tile manufacturing methods are aimed at tile formation by dry-pressing powders already mixed with colourings and possibly with other aids.
  • the decorative effects on the exposed surface of said tiles are due to the distribution of the colouring within the pressed powder mass.
  • One type of tile decoration obtainable by said technique consists of a random distribution of multi-colour veining within the bulk of the tile, giving its exposed surface the appearance of marble, in particular of marble with variously coloured elongate veining.
  • said powders must in total have and maintain an at least partly stratified arrangement, and be distributed throughout the thickness so that different coloured quantities appear at the surface as elongated veins, partly mixed with the adjacent masses.
  • the EP 0 605 930 discloses a plant for the. moulding of ceramic tiles comprising a powders loading device for ceramic presses intended for tile formation, in which a loading discharge receiver for the powders fed by upper reciprocating distributor is provided for.
  • a loading carriage is driven with to and fro movement between a position close to the mould cavities and a position close to the loading discharge receiver, said carriage comprising a number of grids equal to the number of mould cavities, and travelling between a position underlying said loading discharge receiver and a position overlying the mould cavities.
  • the upper reciprocating distributor discharges into said loading discharge receiver at least two powders of different colour, and the distribution in the mass of powders of said at least two powders gives rise to the final tile veining.
  • the loading device of EP 0 605 930 presents some drawbacks consisting in the orientation of the veining, and in its distribution.
  • An object of the present invention is to provide means for loading these powders into the mould cavities which, within the framework of a simple and reliable construction, enable the desired powder distribution to be obtained.
  • a further but no less important object of the invention is to enable said powder loading means to receive emerging quantities of different coloured powders separated by a line as highly defined as possible, so as to obtain on the exposed tile surface adjacent surface-visible veins in which the touching colours are in sharp contrast, ie with very little shading.
  • Figure 1 is a schematic side view of the invention.
  • Figure 2 is an enlarged part of Figure 1.
  • Figure 3 is a section on the line III-III of Figure 2, to a reduced scale.
  • Figure 4 is a section on the line IV-IV to an enlarged scale.
  • Figure 5 is a plan view of the grid.
  • the figures show a usual ceramic press 1, the plate of which carries a mould 2 with three impressions or cavities, which is of usual type and will therefore not be described in detail.
  • the means for loading powders into the mould are positioned as usual on the rear side of the press.
  • Said means comprise a table 3 on which a usual loading carriage 4 driven with reciprocating movement slides, and which is coplanar with the upper surface of the impressions in the mould 2, themselves coplanar with the press plate.
  • the carriage 4 For each mould cavity or impression, the carriage 4 comprises at least one grid 5 which moves from a region in which it overlies the impressions, to a rear region in which it receives the powder to be pressed.
  • the grid is closed lowerly by the actual table on which the carriage slides, except in the region in which it overlies said mould cavity.
  • a single transverse discharge receiver 13 which is rectangular in plan and has a dimension in the carriage travel direction which is less than the grid dimension in the same direction.
  • the receiver 13 has its lower mouth practically in contact with the upper surface of the carriage, and maintains it closed except when the grid 5 is below said mouth.
  • the grid 5 is divided into three parts, the receiver 13 also being divided into three parts, each intended to overlie one of the parts of the grid (see Figures 3, 4).
  • Each of the three inclined segments 6 occupies a width of the plate 7 at least equal to the width of one of the three parts into which the receiver 13 is divided.
  • the inclined plate 7 has an inclination such as to enable the powder lying on it to slide freely downwards, this inclination being about 45° in the example.
  • each hopper 8 Overlying the entire width of the inclined plate 7 there are a plurality of hoppers 8, namely four hoppers 81, 82, 83, 84 in the example, their lower mouth consisting of a slit of length equal to the width of the underlying plate, each hopper intended to contain a determined quantity of powder of desired particle size and colour.
  • each hopper is throttled by a gate valve which regulates the powder flow rate, and is closed by a rotary star valve 10.
  • Both the hoppers 8 and the inclined plate are supported by a rear structure 11, the inclined plate being supported at its centre and fixed onto a shaft so that its inclination can be varied.
  • the structure 11 also supports the said discharge receiver 13.
  • the star valves 10 and the flow regulating gate valves 9 are controlled by a microprocessor programmed to allow the desired powder quantities and qualities to fall at each cycle.
  • the grid 5 is usually composed of a frame 51 defining an empty space occupied by seven separators 52.
  • the shape of said seven separators is substantially indifferent in attaining the results required of the invention.
  • the seven separators should preferably be rectilinear and have the same inclination to the longitudinal axis of the plate 7 as the edges 6.
  • the gate valves 9 and the star valves 10 are operated synchronously with the movement of the carriage 4, so that at least two superposed layers of different quality powder form on the inclined plate 7.
  • said at least two layers land to widen out and partially mix, to form in the receiver a quantity of strata in powder form partly mixed at their separation surfaces and orientated in an inclined direction.
  • the extent and quality of said mixing also depends on the form of the grid.
  • the grid is composed of a very fine mesh of square cells, the powder distribution would in the limit not change.
  • the grid comprises baffles nearly parallel to the inclined edges 6 of the plate 7, vein distribution is accentuated in a direction inclined to the tile sides.

Landscapes

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

Claims (6)

  1. Dispositif de chargement de l'argile pour presses céramiques de moulage de carreaux, comprenant une petite trémie de chargement et déchargement (13), un chariot de chargement (4) en mesure de se déplacer par mouvement d'aller-retour entre une position proche des cavités du moule de la presse céramique et une position proche de la petite trémie de chargement et déchargement; ce chariot compte autant de grilles (5) que le moule compte de cavités; ces grilles ont la possibilité de coulisser entre une position située au-dessous de la petite trémie de chargement et déchargement et une position située au-dessus des cavités du moule; le dispositif compte également deux trémies minimum, et est caractérisé par le fait que dans la petite trémie (13) s'engage un plan (7) incliné dans le sens longitudinal de telle sorte que la poudre présente sur celui-ci puisse s'écouler librement vers le bas et dont le bord antérieur est constitué d'un groupe de segments (6) inclinés par rapport à l'axe longitudinal du plan, en nombre identique à celui des grilles du chariot; les deux trémie (8) sont positionnées au-dessus du plan et disposées l'une à la suite de l'autre dans le sens de la déclivité du plan; chaque trémie est dotée de distributeurs de poudres (9 et 10) qui couvrent toute la largeur du plan.
  2. Dispositif selon la revendication 1, caractérisé par le fait que la petite trémie de déchargement est subdivisée en autant de parties que le chariot compte de grilles (5) et autant de cavités que compte le moule, chaque partie recevant un des segments inclinés (6) du bord antérieur du plan incliné (7).
  3. Dispositif selon la revendication 2, caractérisé par le fait que chacun des segments inclinés (6) occupe toute la largeur de la partie correspondante de la petite trémie de déchargement.
  4. Dispositif selon la revendication 1, caractérisé par le fait qu'à proximité de chacun des segments inclinés (6) du plan incliné, est placé, sur toute la largeur, un volet vertical en tôle (62) qui contraint l'argile déchargée par le segment à tomber verticalement.
  5. Dispositif selon la revendication 1, caractérisé par le fait qu'au-dessus du plan incliné (7) sont positionnées plusieurs trémies (81-84) dont la bouche inférieure est constituée d'une fente (9) dont la longueur est égale à la largeur du plan (7) situé au-dessous; chaque trémie est prévue pour contenir une quantité de poudre donnée, de la granulométrie et la couleur nécessaires.
  6. Dispositif selon la revendication 1, caractérisé par le fait que le débit de poudre s'écoulant par la bouche inférieure de chaque trémie (81-84) est réglé par une vanne (9), chaque bouche étant fermée par une vanne rotative en étoile (10).
EP97202984A 1996-10-29 1997-09-29 Dispositif d'alimentation d'argile pour presses destinées à la fabrication de carreaux en céramique Expired - Lifetime EP0839618B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96RE000084A IT1287772B1 (it) 1996-10-29 1996-10-29 Dispositivo di caricamento della terra per presse ceramiche per piastrelle
ITRE960084 1996-10-29

Publications (2)

Publication Number Publication Date
EP0839618A1 EP0839618A1 (fr) 1998-05-06
EP0839618B1 true EP0839618B1 (fr) 2002-08-28

Family

ID=11398955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97202984A Expired - Lifetime EP0839618B1 (fr) 1996-10-29 1997-09-29 Dispositif d'alimentation d'argile pour presses destinées à la fabrication de carreaux en céramique

Country Status (4)

Country Link
EP (1) EP0839618B1 (fr)
DE (1) DE69714944D1 (fr)
ES (1) ES2180888T3 (fr)
IT (1) IT1287772B1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1298598B1 (it) * 1998-03-06 2000-01-12 Marazzi Ceramica Macchina per la produzione di piastrelle con variazione di colore nella massa
CA2278105A1 (fr) * 1998-07-23 2000-01-23 Hiroshi Uchida Methode de production d'articles profiles a motif
IT1312055B1 (it) * 1999-04-09 2002-04-04 Marazzi Gruppo Ceramiche S P A Metodo, dispositivo di caricamento e pressa per la realizzazione dipiastrelle con striature o venature nella massa.
IT246960Y1 (it) * 1999-12-21 2002-04-10 Marazzi Gruppo Ceramiche S P A Pressa per la realizzazione di piastrelle dotata di dispositivo dicaricamento perfezionato.
CN102120335B (zh) * 2010-11-30 2012-12-05 霍镰泉 一种瓷质微粉砖的布料设备
CN102120336B (zh) * 2010-11-30 2013-06-05 霍镰泉 一种瓷质微粉砖的布料工艺
ES2472140B2 (es) 2014-02-07 2015-01-29 Kerajet S.A. Método de proyección de sólidos sobre una superficie
CN108422547B (zh) * 2018-05-10 2020-05-05 安徽省亚欧陶瓷有限责任公司 一种多工位输料打印瓷砖装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191125592A (fr) * 1900-01-01
US1727580A (en) * 1926-05-20 1929-09-10 Edwin H White Method of and apparatus for manufacturing tiles
DD126956B1 (de) * 1975-11-20 1983-08-17 Eduard Kalin Presse zur herstellung von zweischichtigen keramischen platten
ATE122278T1 (de) * 1993-01-08 1995-05-15 Mirage Ceramica Spa Verfahren zum herstellen von trockenen fliesen, mit seiner formanlage und den hergestellten fliesen.

Also Published As

Publication number Publication date
IT1287772B1 (it) 1998-08-18
ITRE960084A0 (it) 1996-10-29
DE69714944D1 (de) 2002-10-02
ITRE960084A1 (it) 1998-04-29
EP0839618A1 (fr) 1998-05-06
ES2180888T3 (es) 2003-02-16

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