EP0659527B1 - Méthode et machine pour fabriquer des carreaux de densité et d'épaisseur constantes, et carreaux ainsi obtenus - Google Patents

Méthode et machine pour fabriquer des carreaux de densité et d'épaisseur constantes, et carreaux ainsi obtenus Download PDF

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Publication number
EP0659527B1
EP0659527B1 EP94203545A EP94203545A EP0659527B1 EP 0659527 B1 EP0659527 B1 EP 0659527B1 EP 94203545 A EP94203545 A EP 94203545A EP 94203545 A EP94203545 A EP 94203545A EP 0659527 B1 EP0659527 B1 EP 0659527B1
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EP
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Prior art keywords
carriage
plant
tile
feet
mould
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Expired - Lifetime
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EP94203545A
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German (de)
English (en)
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EP0659527A1 (fr
Inventor
Lodovico Bardelli
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Mass SpA
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Mass SpA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/005—Control arrangements
    • 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
    • B28B13/023—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities
    • 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
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/0063—Control arrangements
    • B28B17/0072—Product control or inspection
    • 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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/003—Pressing by means acting upon the material via flexible mould wall parts, e.g. by means of inflatable cores, isostatic presses

Definitions

  • This invention relates generally to a method for manufacturing ceramic tiles, and more specifically to a method for forming tiles of uniform compaction and thickness.
  • the invention also relates to the means for implementing said method.
  • Ceramic tiles in general are known to be formed in convenient moulds positioned on suitable forming presses.
  • said presses are hydraulic and basically comprise:
  • the operating pressure of said cylinder-piston unit can be adjusted as required, ie on the basis of the parameters for the work underway.
  • the moulds to be associated with said presses comprise the three said plates, of which the intermediate plate comprises at least one forming cavity to be charged with at least one material to be compacted, the lower plate comprises at least one die to define the base of said at least one cavity and to form one of the two tile faces, and the upper plate is provided with at least one die to form the other tile face.
  • said at least one material is charged by a carriage arranged to occupy a first position to the side of the die plate, where it receives said at least one material, and a second position overlying the die plate, where it discharges said at least one material into said at least one cavity.
  • the to-and-fro movement of the carriage is generated by a connecting rod-crank system operated by a convenient drive unit, the carriage consisting of a rectangular frame with flaps fixed to two opposing sides thereof. Normally said flaps are fixed to those two sides of the frame which are parallel to the carriage movement.
  • a feed hopper for said material is also associated with said carriage.
  • the hopper is stationary and the respective carriage comprises a rear horizontal plate arranged to close and open the discharge mouth of the hopper when the carriage is in its advanced or discharge position and, respectively, when the carriage is in its withdrawn or loading position.
  • the hopper is arranged to move relative to the carriage with reciprocating rectilinear motion parallel to the carriage movement.
  • the depth of the forming cavity in the die plate is determined by the lower die which can assume three operating positions, namely:
  • reverse face dies can have their active face formed in various ways.
  • said active face can be defined:
  • those dies provided for forming the tile exposed face and commonly known as “exposed face dies", have their active face defined by the surface of a metal structure.
  • the invention relates to moulds provided with such isostatic dies. See f.i. document EP-A-0556163.
  • uniform compaction is achieved at the expense of geometrical or shape defects, in terms of a tile thickness which is not uniform from one point to another.
  • said dies covered with a membrane closing at least one rear chamber filled with oil have numerous advantages, they have proved unsatisfactory in manufacturing relatively large dimension tiles of relatively small overall thicknesses.
  • the degree of clay compact ion at the feet depends only on the reaction offered by the membrane consequent on its deformation, and it is apparent that where the membrane is thinnest, ie at the depressions in which the tile feet are formed, for equal absolute deformation it undergoes relative specific deformations which are much greater than those in surrounding regions where it is of greater thickness.
  • the tile has a rather irregular surface, ie different thicknesses, at the depressions between said feet.
  • the charging of the forming cavity is adjusted as a result of visual checks on the surface of the regions between the feet and on the uniformity or non-uniformity of the tile thickness.
  • the main object of the present invention is to provide a method and its means of implementation able to produce tiles which are of uniform compaction and thickness and are statistically identical.
  • the method of the invention comprises continuously forming tiles, automatically monitoring the planarity of those tile regions between the feet and, if unsatisfactory, to automatically modify at least one of the parameters governing the charging of the forming cavities, in accordance with an established priority based on the type, size and position of the defect shown up by said planarity monitoring.
  • planarity monitoring and the possible adjustment of said at least one parameter are effected at a frequency equal to the production rate of the press, ie in practice in real time.
  • planarity monitoring assumes a reference point or plane and measures the maximum distance between said reference and the tile region adjacent to the foot, to deduce from said measurement any geometrical irregularity on the rear of the tile, or in other words its non-uniformity of thickness.
  • the various parameters responsible for the filling of the mould cavity are automatically adjusted on the basis of said non-uniformity.
  • Adjustments are made only when the thickness non-uniformity exceeds a certain value considered acceptable, such as 0.2-0.3 mm.
  • the filling irregularities occur in the direction of movement of the charging carriage, hence the thickness non-uniformity measurements are made in the same direction, this being the direction in which the tile advances after being formed.
  • the means for implementing said method comprise an isostatic mould to be positioned on a hydraulic press, those dies thereof for forming the tile laying face comprising an elastomeric membrane carrying impressions for forming the tile feet, and closing a series of rear chambers for containing hydraulic oil, said chambers being hydraulically connected to the press cylinder-piston unit which exerts the forming pressure.
  • said hydraulic connection is made by a hydraulic circuit which incorporates, starting from said cylinder-piston unit, a valve unit arranged to allow oil to pass alternately in the two opposing directions, and at least one pressure multiplier device, during the course of each pressing the opening of said valve unit in one direction depending on a pressure less than the maximum operating pressure of said cylinder-piston unit, whereas the opening of said valve unit in the opposite direction depends on the repositioning of said pressure multiplier device.
  • a hydraulic counterpressure is made available such as to raise the slab during the final pressing stage.
  • a device able to measure the surface conformation or planarity of said depressed regions, and which is combined with a system which on the basis of the data obtained by said measuring device acts on the means on which the charging of the forming cavity depends.
  • said system consists of an electronic device the input of which is connected to said measuring device, and the output of which is connected to said means on which said charging depends, so as to adjust, or not, its manner of operation and possibly its configuration in response to the readings taken.
  • the forming cavity is filled with a layer having practically uniform density and thickness, so that besides being uniformly compacted the tiles also have uniform thickness.
  • Figure 1 shows in combination the hydraulic cylinder-piston unit 1 of a ceramic press, a reverse face die 2 pertaining to a ceramic mould for locating on the bed of said press, and a hydraulic circuit 3 connecting together said unit 1 and die 2 as described hereinafter, and into which there are connected a valve unit 4 and a pressure multiplier 5.
  • said cylinder-piston unit 1 comprises a cylinder 10 which is connected to a source of pressurized hydraulic liquid, and within which a piston 11 is mounted to slide under sealed conditions.
  • the rod 12 of this latter emerges from the lower end of the cylinder 10 where it fixedly carries the press movable cross-member which supports the mould upper plate (not shown), provided lowerly with a die, also not shown.
  • Said (upper) die cooperates with the (lower) die 2 to form the tiles, by moulding their exposed face.
  • the mutual position of the two dies can be inverted.
  • the reference numeral 45 indicates the ceramic mould intermediate plate or die plate, which can either be fixed to the press bed or be supported on said bed by yieldable supports, not shown, of hydraulic or mechanical type.
  • Said die plate 45 comprises at least one forming cavity 46 for charging at least one pulverulent material 78 to be compacted, such as atomized clay.
  • the base of the cavity 46 is defined by the die 2, which can move in height as explained in the introduction.
  • the die 2 is fixed to the mould lower plate 44, which is supported by the press bed by way of a series of actuators 440, for example four in number.
  • said actuators 440 are of fine adjustment type, for the reasons given hereinafter.
  • actuators 440 are remotely adjustable.
  • the carriage 47 is driven to slide forwards (towards the right in Figure 1) and rearwards (towards the left) by a connecting rod-crank system 49 operated by a drive unit 48.
  • said unit 48 comprises a direct current electric motor with an electronic card for continuous r.p.m. adjustment.
  • a clay feed hopper 14, of known type in the illustrated embodiment, is associated with the carriage 47.
  • the carriage 47 comprises a rectangular frame 64, the front cross-member of which is provided with a pusher 65 and a scraper 66.
  • the purpose of the pusher 65 is to remove the tiles 99 ( Figure 1) from the die plate 45 and rest them on a conveyor 100 during the outward travel of the carriage, whereas the scraper 66 levels the clay layer 78 deposited in the cavity 46 and cleans the upper face of the die plate 45 during the return travel of the carriage 47.
  • Each flap 16 is provided with a series of equidistant plates 17 arranged perpendicular thereto and symmetrically about it, the plates of each series being interposed between the plates of the two adjacent series.
  • Each flap 16 comprises two opposing through holes 160 through which there are inserted, with a certain radial clearance, two threaded shafts 67 the threads of which upperly engage two elastic rods 68.
  • Said threaded shafts 67 are rotated by two electric motors 670 of double direction of rotation.
  • Said shafts 67 have a thread which for one half of their length is left handed and for the other half is right handed.
  • Said rods 68 are elastically flexible, and consist for example of pieces of harmonic steel wire.
  • Each rod 68 supports the corresponding end of the flap 16 by way of a pin 69 which is perpendicular to this latter ( Figures 6 and 7).
  • the pin 69 has a frusto-conical end which together with a terminal frusto-conical head 70 forms a circumferential groove of V-shaped cross-section.
  • This groove engages a respective hole in the flap 16, this hole having flared ends the generating lines of which define an angle less than the angle at the vertex of said V shape.
  • Said adjustment is made by a threaded push rod 71 controlled by a micromotor 171 of two directions of rotation, which is fixed below the pin 69.
  • the push rod 71 rests against the rear face (with reference to the direction of advancement of the carriage 47) of the flap, against the opposite face of which there acts a flat spring 72.
  • the purpose of the rods 68 is to discretely adjust the distance between the flaps 16, in particular at the commencement of the production cycle of a determined material;
  • It comprises a series of identical units (for example four in number) positioned side by side in a direction transverse to the conveyor 100 and all connected to a central processing and control system 174, such as a programmable electronic processor.
  • a central processing and control system 174 such as a programmable electronic processor.
  • Each individual unit comprises a vertical core 73 slidable within a hollow body 75 provided with three windings, of which the central winding is connected to a power supply 173.
  • the core 73 supports an idle roller 74 with its axis horizontal and positioned transverse to the conveyor 100 to make contact with the laying face of the tiles 99.
  • Said other two windings are connected in series and their ends are connected to a reading unit 76 connected to the central processor 174 and to a display 77, for example of liquid crystal type.
  • the number of display cells of this latter is at least equal to the number of depressed regions 66 of the tile 99 to be contacted by the roller 74.
  • the central control processor 174 is connected at its input to the units 76, and at its output (dashed lines at the bottom of Figure 4) to the actuators 440 and motor 48 (Figure 1), and to the motors 670 and micromotors 171 ( Figure 5).
  • central control processor 174 there is associated at least one feeler arranged to contact the exposed face of the tiles 99 in transit on the conveyor 100.
  • the purpose of said at least one feeler, indicated by 374 in Figure 4, is to monitor the thickness of the tiles, and is connected to the processor 174.
  • This latter is provided with means for storing geometrical characteristics of the tiles, such as the distance between the feet 33, their thickness, and the allowable average tile thickness, and with means for emitting correlations such that the readings provide the most appropriate adjustment for achieving a uniform layer of pulverulent material 78.
  • a pipe 30 valved by a sequence valve 41, regulated as indicated for the reasons which will be apparent hereinafter.
  • Said valve 41 is arranged to allow oil to pass in the direction from the unit 1 to the die 2, the valve 41 being bypassed by a pipe 42 containing a non-return valve of ball type. This latter is arranged to allow oil to pass in the opposite direction to that just specified.
  • the die 2 is connected to the pipe 30 via the multiplier device 5, and if the ceramic mould has several forming cavities, each provided with a die 2, a device 5 is provided for each of them.
  • the pipe 30 comprises as many branches 300 (indicated by dashed and dotted lines in Figure 1) as there are dies 2.
  • said multiplier 5 comprises a hollow body 50 within which a piston of different sections 51 and 53 is slidingly mounted, the section 51 being greater than the section 53.
  • Said piston sections 51 and 53 are contained in respective chambers 52 and 54 via suitable gaskets.
  • the first chamber 52 is connected to that branch of the pipe 30 connected to the valve unit 4, whereas the second chamber 54 is connected to that branch of the pipe 30 connected to the die 2.
  • a compressed repositioning spring 500 the operating seat of which opens to the outside via a vent aperture 501.
  • said push rods 55 and 56, and said sequence valve 41 are preferably controlled by the central system 174.
  • the die 2 comprises a metal body 20 to be fixed to the lower plate 44 of the ceramic mould and comprising a series of through horizontal ducts 27, two in number in the illustrated embodiment (Figure 2), which are closed at one end whereas at their other end are connected to the pipe 30 ( Figure 1).
  • Each individual hole 28 opens into the centre of the top of a circular raised portion 61 pertaining to a plurality of raised portions 61 uniformly distributed over the upper (or active) face of the body 20.
  • each line or column of said plurality are offset from the raised portions 61 of the immediately adjacent lines or columns.
  • Said raised portions can be replaced by projections of another shape, such as crossed ribs.
  • a perforated metal slab 21 having substantially the same plan configuration as the upper face of the body 20 is fixed by rear locking members 25 ( Figure 3) such as screws, to the upper face of the body 20 from which said raised portions 61 rise.
  • Said slab 21 is provided with a number of holes equal in number to the raised portions 61, the inner diameter of said holes being greater than the outer diameter of the raised portions 61 (see Figures 2, 3).
  • the thickness of the slab 21 is practically equal to the height of the raised portions 61.
  • edges of said holes are flared upwards and comprise a lower recess defining an anchoring ledge for an overlying slab 22 of suitable material, such as vulcanized rubber or other equivalent elastomer, hereinafter also known as the membrane.
  • the depth of said chamber 60 is very small (see Figure 3), for example it can be practically zero, the seal being provided by a lateral gasket 62 associated with the respective raised portion 61.
  • said grooves 63 can be arranged in ray formation or can consist of a single spiral-shaped groove.
  • the upper peripheral region of the body 20 is surrounded by a perimetral recess 200 (see Figure 3) receiving a perimetral frame 23 fixed by screws indicated schematically by 24.
  • the flat upper edge of said frame 23 is flush with the perimetral edge of the membrane 22, the constituent elements of said frame 23 having a transverse shape specular about the longitudinal axis of said screws 24.
  • the aforedescribed plant implements the method of the invention as follows.
  • the piston After unloading the formed tile 99 and charging the mould with the material 78 to be pressed, the piston is enabled to descend, by which the material 78 present in the cavity 46 is pressed.
  • the chambers 60 do not contain oil, but before the pressing is complete, and more specifically when the pressure of the oil present in the operating chamber 13 reaches the set value of said valve 41, this valve opens to allow oil to pass.
  • the measurements are made along bands parallel to the conveying direction in that any defects in charging the material 78 are distributed in said direction.
  • the central processor 174 processes the travel amplitudes of each roller 74, displaying the data on the respective display 77 and converting them into commands for adjusting the charging parameters.
  • the differences between said amplitudes are an indication of a shape defect in the tile, which defect can be practically eliminated by modifying the charging of the cavity 46, in particular the distribution of the material 78 within the cavity.
  • each roller 74 deviate from each other by a quantity less than the allowable, ie 0.2-0.3 mm, the tile 99 is acceptable in practice.
  • the adjustment occurs automatically by varying the parameters concerned, ie the carriage speed, the the mutual arrangement and inclination of its flaps 16, and the moment in which the lower die defining the mould cavity begins to descend.
  • All said adjustments are preferably made during successive cycles, ie for successive tiles, until a statistically acceptable charging is achieved.

Claims (20)

  1. Procédé de fabrication de carreaux en général de céramique par pressage dans un moule isostatique dans lequel la matrice prévue pour former les semelles comprend une membrane supportée rigidement sur ces semelles, ledit moule étant monté dans une presse équipée d'un chariot pour charger le matériau dans les cavités du moule, caractérisé en ce qu'il comprend les opérations suivantes, effectuées à des intervalles de temps prédéterminés, consistant à :
    mesurer l'intérieur du carreau, les déviations maximum à partir d'un plan de référence de ces régions (66) qui sont adjacentes aux semelles,
    traiter lesdites déviations dans un microprocesseur,
    modifier, sur la base de l'importance et de la distribution des déviations mesurées et traitées, au moins l'un des paramètres suivants : la vitesse de déplacement du chariot, le commencement de la descente de la matrice inférieure du moule en relation avec la position du chariot, l'inclinaison des volets de division qui sont présents dans la cavité du chariot.
  2. Procédé selon la revendication 1, caractérisé en ce que la mesure de déviation est effectuée dans la direction de l'avancement du carreau.
  3. Procédé selon la revendication 1, caractérisé en ce que lorsque l'on détecte un excès de matériau en direction de ce côté de la cavité qui est le plus éloigné du chariot de chargement, on modifie au moins l'un des paramètres suivants, comme indiqué :
    on réduit la vitesse de déplacement du chariot,
    on retarde le commencement de la descente de la matrice,
    on incline les volets de division présents dans la cavité du chariot vers l'arrière, et vice versa.
  4. Procédé selon la revendication 1, caractérisé en ce que lorsque l'on détecte un excès de matériau dans la région centrale de la cavité du moule, la distance séparant les volets centraux des séries de volets présents dans le chariot est réduite, et vice versa.
  5. Procédé selon la revendication 1, caractérisé en ce que le chariot est entraíné à vitesse variable lors de chaque course de déplacement, de telle façon que si une accumulation de matériau en excès se produit à l'intérieur d'une certaine région du moule, la vitesse du chariot dans ladite région est augmentée, et vice versa.
  6. Installation pour la mise en oeuvre du procédé revendiqué dans les revendications 1 à 5, caractérisée en ce qu'elle comprend :
    une presse pour former les carreaux en céramique sur laquelle est monté :
    un chariot (47) pour charger le matériau à former dans une presse isostatique comportant une matrice inférieure (2) pour former l'arrière des carreaux (99), et dans lequel,
    une membrane (22) est prévue qui repose par dessus les chambres (60) qui est destinée à contenir l'huile hydraulique et qui est fixée à la matrice dans ces régions (29) qui sont destinées à former les semelles (33),
    lesdites chambres étant en communication hydraulique avec le vérin (1) d'actionnement de la presse, et situées entre elles, caractérisée en ce qu'elle comprend :
    des moyens positionnés dans la'direction d'avancement du carreau pour mesurer la distance maximum, à l'intérieur du carreau, entre ces régions (66) situées entre les semelles (33) et un plan de référence (100), et
    un processeur électronique pour traiter les données mesurées et pour contrôler au moins l'un des moyens suivants :
    les moyens d'actionnement du chariot ; les moyens d'abaissement de la matrice inférieure ; et les moyens pour modifier la configuration du chariot
  7. Installation selon la revendication 6, caractérisée en ce que la connexion hydraulique entre l'unité (1) cylindre-piston et les chambres qui sont sous la membrane (22) comprend, dans l'ordre en partant de ladite unité (1), une unité (4) de soupape fonctionnant sous une pression inférieure à la pression maximum de l'unité (1), et un multiplicateur de pression (5).
  8. Installation selon la revendication 7, caractérisée en ce que ladite unité de soupape (4) comprend une soupape séquentielle (41) comportant des moyens de régulation automatiques et qui est court-circuitée par une soupape anti-retour telle qu'une soupape à bille (43).
  9. Installation selon les revendications 6 à 8, caractérisée en ce qu'elle comprend à l'intérieur d'un et même cadre plus d'une cavité (46) avec leurs matrices respectives (2) pour former l'arrière du carreau, chaque matrice comprenant des chambres (60) contenant de l'huile hydraulique et étant reliée par des connexions hydrauliques indépendantes à cette chambre de l'unité (1) qui exerce la pression de formation.
  10. Installation selon la revendication 6, caractérisée en ce que les moyens pour mesurer la distance maximum entre les régions comprises entre les semelles des carreaux et un plan de référence, comprennent une série de palpeurs disposés côte à côte suivant une ligne perpendiculaire à la direction de retrait du carreau.
  11. Installation selon la revendication 10, caractérisée en ce que chaque palpeur comprend un rouleau fou (74) dont l'axe est horizontal et qui est positionné transversalement à ladite direction de retrait du carreau, ledit rouleau étant supporté par un corps (73) disposé de façon à coulisser relativement à un élément (75), tel qu'une bobine électrique qui, en combinaison avec ledit processeur, est susceptible de mesurer, traiter et convertir les amplitudes de déplacement dudit corps (73).
  12. Installation selon les revendications 6 et 11, caractérisée en ce que ledit processeur central (174) comprend des moyens pour stocker les caractéristiques géométriques des carreaux, telles que la distance entre les semelles (33), leur épaisseur, et l'épaisseur moyenne acceptable des carreaux, et pour émettre des corrélations telles que les lectures fournissent le réglage le plus approprié pour obtenir une couche uniforme de matériau pulvérulent.
  13. Installation selon la revendication 6, caractérisée en ce que ledit chariot est entraíné avec un mouvement rectiligne alternatif horizontal par un système de liaison bielle-manivelle (49) actionné par un moteur électrique à courant continu (48) avec un réglage en continu de la vitesse de rotation fonctionnellement relié audit processeur central (174).
  14. Installation selon la revendication 6, caractérisée en ce que les courses de déplacement de la matrice inférieure sont contrôlées par des moyens de réglage fin constitués de dispositifs d'actionnement (440) dont le fonctionnement est contrôlé par le processeur central.
  15. Installation selon la revendication 13, caractérisée en ce que ledit chariot (47) comprend un cadre rectangulaire (64) dont les organes longitudinaux sont reliés ensemble par des volets transversaux (16) avec possibilité de régler la distance et l'orientation entre ces volets.
  16. Installation selon la revendication 15, caractérisée en ce que la distance entre les volets est réglée par deux arbres filetés (67) montés en rotation sur les organes longitudinaux et entraínés par des moteurs respectifs (670) contrôlés par le processeur central (174), lesdits deux arbres filetés étant introduits avec un certain jeu dans des trous respectifs prévus aux extrémités desdits volets (16) et chacun desdits arbres comprenant deux filetages tournés en sens opposés se faisant face, supportant les volets au moyen d'organes à enlèvement rapide.
  17. Installation selon la revendication 16, caractérisée en ce que lesdits organes à enlèvement rapide comprennent une barre souple élastiquement telle qu'une longueur de corde à piano en acier (68) destinée à être reçue dans la partie supérieure de la gorge hélicoïdale de l'arbre fileté respectif et qui est fixée à une goupille (69) à laquelle est couplée l'extrémité correspondante du volet (16).
  18. Installation selon la revendication 17, caractérisée en ce que lesdits volets (16) sont supportés par les paires respectives de goupilles terminales (69) de manière à pouvoir osciller dans le plan vertical.
  19. Installation selon la revendication 18, caractérisée en ce que ladite oscillation est obtenue par engagement lâche entre chaque extrémité du volet (16) et de la goupille support respective (69), en dessous de laquelle se trouve une barre (71) de poussée à pression réglable agissant contre le volet (16) en opposition à un organe de repositionnement élastique qui appuie contre cette face du volet qui fait face à la direction d'avancement du chariot (67).
  20. Installation selon la revendication 19, caractérisée en ce que, à chaque paire de barres de poussée se faisant face (71), est associée une paire respective de micro-moteurs d'entraínement (171) contrôlés par le processeur central (174).
EP94203545A 1993-12-21 1994-12-06 Méthode et machine pour fabriquer des carreaux de densité et d'épaisseur constantes, et carreaux ainsi obtenus Expired - Lifetime EP0659527B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE930089 1993-12-21
ITRE930089A IT1262344B (it) 1993-12-21 1993-12-21 Metodo e impianto per la formatura di piastrelle a compattazione e spessore uniformi, e piastrelle cosi' ottenute.

Publications (2)

Publication Number Publication Date
EP0659527A1 EP0659527A1 (fr) 1995-06-28
EP0659527B1 true EP0659527B1 (fr) 2000-03-22

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EP94203545A Expired - Lifetime EP0659527B1 (fr) 1993-12-21 1994-12-06 Méthode et machine pour fabriquer des carreaux de densité et d'épaisseur constantes, et carreaux ainsi obtenus

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AT (1) ATE190899T1 (fr)
DE (1) DE69423583T2 (fr)
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IT1269262B (it) * 1994-09-13 1997-03-26 Maris Algeri Stampo isobarico per la pressatura di piastrelle ceramiche, e metodo relativo
DE19731146C1 (de) * 1997-07-21 1999-02-25 Dietrich Engmann Isostatischer Preßstempel zum Herstellen keramischer Fliesenrohlinge und Presse mit diesem Preßstempel
ES2181514B1 (es) * 1999-07-15 2004-06-01 Constantino Parra Rodriguez Dispositivo para regular la compactacion en punzones para prensas.
DE10217199C1 (de) * 2002-04-18 2003-09-04 Dietrich Engmann Vorrichtung zur automatischen Korrektur der Dichte von keramischen Fliesen-Rohlingen
EP1510311A1 (fr) * 2003-08-23 2005-03-02 Euroditan S.L. Procédéde production de carreaux en céramique
WO2005068143A1 (fr) * 2003-10-29 2005-07-28 Jimian Chen Equipement de distribution de materiau a tuyaux multiples pour le compactage de tuiles et procede de distribution
ITRE20050033A1 (it) * 2005-03-25 2006-09-26 Cbm Srl Punzone ceramico tipo marca
ITRE20050042A1 (it) * 2005-04-26 2006-10-27 Sacmi Sistema di controllo compattazione mediante stampi isostatici
CN100463788C (zh) * 2005-11-03 2009-02-25 唐君 一种仿大理石线条的陶瓷砖的布料方法及布料设备
ITMO20080040A1 (it) * 2008-02-15 2009-08-16 Sacmi Apparato e metodo di pressatura
IT201900013497A1 (it) * 2019-07-31 2021-01-31 Officina Ferrari Carlo Spa Metodo di controllo della formatura di piastrelle ceramiche e relativo dispositivo di formatura
CN113910428A (zh) * 2021-10-15 2022-01-11 清远市榕兴新型环保建材有限责任公司 一种加气砖加工成型装置
CN115366227B (zh) * 2022-08-08 2024-04-09 四会市大美地新材料有限公司 一种砖坯成型工艺
CN116100656B (zh) * 2023-03-28 2023-07-25 铜陵优必胜新材料科技有限公司 一种陶瓷片覆膜定型装置、生产线及定型方法

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DE69423583T2 (de) 2000-08-03
DE69423583D1 (de) 2000-04-27
ES2142909T3 (es) 2000-05-01
ITRE930089A0 (it) 1993-12-21
EP0659527A1 (fr) 1995-06-28
IT1262344B (it) 1996-06-19
ATE190899T1 (de) 2000-04-15
ITRE930089A1 (it) 1995-06-21

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