EP3915745A1 - Équipement pour la fabrication de dalles en matériau céramique - Google Patents

Équipement pour la fabrication de dalles en matériau céramique Download PDF

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Publication number
EP3915745A1
EP3915745A1 EP21175624.2A EP21175624A EP3915745A1 EP 3915745 A1 EP3915745 A1 EP 3915745A1 EP 21175624 A EP21175624 A EP 21175624A EP 3915745 A1 EP3915745 A1 EP 3915745A1
Authority
EP
European Patent Office
Prior art keywords
containment
equipment
supporting surface
fact
frame structure
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Withdrawn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
EP21175624.2A
Other languages
German (de)
English (en)
Inventor
Fabio TAROZZI
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.)
Siti B&T Group SpA
Original Assignee
Siti B&T Group 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 Siti B&T Group SpA filed Critical Siti B&T Group SpA
Publication of EP3915745A1 publication Critical patent/EP3915745A1/fr
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B5/00Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping
    • B28B5/02Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type
    • B28B5/021Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of definite length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/04Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with one ram per mould

Definitions

  • the present invention relates to a piece of equipment for the manufacture of slabs of ceramic material.
  • the manufacture of slabs of ceramic material is generally carried out by preparing a predetermined amount of material to be compacted, placing this predetermined amount of material on a supporting surface and compacting it using suitable pressing means.
  • the traditional method of pressing relative to the manufacture of small-medium sized products, provides that the ceramic material to be compacted is placed inside a cavity into which a relevant pressing pad is fitted. Once the pressing action is over, the material thus compacted is extracted from the cavity and made to move forward towards the subsequent drying or firing stations.
  • This pressing method is characterized by low production outputs due to the high discontinuity of the production process.
  • the supporting surface may be of the type of a belt, on which the ceramic material in powder form to be compacted is then positioned.
  • the pressing of the material is achieved due to the superimposition of a further belt on the supporting surface carrying the material to be compacted and to the crushing action of these belts on the material positioned between them.
  • the material compacted this way is then made to move forward from the same supporting surface towards the subsequent drying or firing stations.
  • the production output is limited because of the need to have a close correlation between the forward movement of the supporting surface and the pressing phase.
  • the supporting surface must be made to move forward by the pitch corresponding to the size of the length of the material deposited thereon, so as to bring it exactly to the pressing means.
  • the equipment of known type applying the aforementioned pressing methods do not allow obtaining slabs of defined dimensions and require subsequent edge finishing operations aimed at obtaining a slab having dimensions corresponding to those of the finished slab.
  • finishing operations cause a lengthening of production times and, in addition, lead to the formation of huge amounts of processing waste that can hardly be reused for further processing.
  • the main aim of the present invention is to devise a piece of equipment for the manufacture of slabs of ceramic material which allows overcoming the drawbacks of the prior art and, in particular, obtaining higher production output, while maintaining high quality characteristics of the compacted slab.
  • one object of the present invention is to minimize the downtime related to the forward movement and pressing phases of the ceramic material and, at the same time, to obtain high quality standards in terms of thickness, flatness and minimization of processing waste.
  • Another object of the present invention is to devise a piece of equipment for the manufacture of slabs of ceramic material which allows overcoming the aforementioned drawbacks of the prior art within a simple, rational, easy and effective to use and affordable solution.
  • reference numeral 1 globally indicates a piece of equipment for the manufacture of slabs of ceramic material.
  • the equipment 1 comprises a load-bearing structure 2, at least one supporting surface 3 associated with the load-bearing structure 2 and movable along a direction of forward movement D, dispensing means 4 of a powdered ceramic material on the supporting surface 3 and pressing means 6 of the ceramic material.
  • the ceramic material is of the type of powdered ceramic material.
  • the supporting surface 3 is of the type of a continuous belt wound around a plurality of motorized pulleys.
  • the dispensing means 4 are configured to release a continuous slab L to be compacted on the supporting surface 3.
  • the dispensing means 4 comprise one or more hoppers 5 arranged above the supporting surface 3.
  • the dispensing means 4 comprise a plurality of hoppers 5 arranged in succession with each other along the direction of forward movement D.
  • the hoppers 5 are adapted to dispense a plurality of different ceramic materials in order to give the final slab a particular aesthetic effect.
  • the pressing means 6 are associated with the load-bearing structure 2.
  • the load-bearing structure 2 comprises a plurality of sheet metal elements 2a, called ribs, adapted to bear the pressing load, which are packconnected to each other to provide high stiffness of the load-bearing structure itself.
  • the pressing means 6 are arranged downstream of the dispensing means 4 with respect to the direction of forward movement D.
  • the stretch of the supporting surface 3 extending between the dispensing means 4 and the pressing means 6 is seamless, it being understood by this definition that the supporting surface 3 is uninterrupted.
  • the pressing means 6 comprise at least one pressing element 7 movable with respect to the supporting surface 3 and adapted to press a portion P of the continuous slab L so as to obtain a compacted slab C of predefined dimensions separate from the continuous slab itself.
  • the pressing element 7 is intended to contact the ceramic material to be compacted arranged above the supporting surface 3 and is movable close to/away from the supporting surface itself.
  • the pressing means 6 comprise a fluid-operated cylinder 8 provided with a piston 8a, movable with respect to the body 8b of the fluid-operated cylinder itself close to/away from the supporting surface 3, and with which a pressing pad 9 is associated, made e.g. of a resinous material, intended to contact the ceramic material to be compacted.
  • the piston 8a and the pressing pad 9 define the pressing element 7.
  • the pad 9 is magnetically associated with the piston 8a, e.g. by means of a magnetic plate 10 positioned between them.
  • the pressing means 6 also comprise an abutment element 11, which is arranged below the supporting surface 3 and adapted to operate as a stop to the force exerted by the pressing element 7.
  • the abutment element 11 is locked together, e.g. magnetically, with the load-bearing structure 2.
  • the supporting surface 3 and the pressing means 6 are operable intermittently and alternately with each other.
  • activation of one of the two corresponds to interruption of the other, i.e., when the supporting surface 3 is moved along the direction of forward movement D, the pressing means 6 are stationary, and when the pressing means 6 are active, the supporting surface 3 is stationary.
  • the equipment 1 comprises containment means 12 of the portion P of the continuous slab L.
  • the containment means 12 have the function of containing the ceramic material during pressing and allow obtaining a compacted slab with defined edges that does not require further finishing operations.
  • the containment means 12 comprise at least one frame structure 13 associated with the load-bearing structure 2 and defining a substantially closed perimeter.
  • substantially closed means that the frame structure 13 extends in a perimeter fashion without interruption.
  • the frame structure 13 is made in a single body piece.
  • the containment means 12 also comprise a plurality of containment elements 14 associated with the frame structure 13 and arranged inside the closed perimeter.
  • the containment elements 14 are arranged along the inner perimeter of the frame structure and face each other.
  • the containment elements 14 comprise at least one pair of lateral containment elements 14a arranged parallel to the direction of forward movement D and at least one pair of frontal containment elements 14b arranged transverse to the direction of forward movement D.
  • the frame structure 13 extends in a substantially horizontal plane parallel to the supporting surface 3.
  • the frame structure 13 is movable between a home position, wherein it is moved away from the supporting surface 3 and allows the continuous slab L to move forward along the direction of forward movement D, and an operating position, wherein it is moved close to the supporting surface 3.
  • the frame structure 13 is movable along a direction of sliding S substantially perpendicular to the supporting surface 3.
  • the containment means 12 comprise a movement assembly of the frame structure 13 between the home position and the operating position.
  • the movement assembly comprises a plurality of actuators 15 of the fluid-operated or electrical type, arranged at the corners of the frame structure 13.
  • the containment elements 14 are locked together with the frame structure 13 in the displacement thereof along the direction of sliding S.
  • the actuators 15 displace the containment elements 14 at the same time as the frame structure 13 moves.
  • the containment elements 14 are also moved away from the supporting surface 3, while with the frame structure 13 in the operating position, the containment elements 14 are moved close to the supporting surface itself.
  • the containment elements 14 are adapted to define with the supporting surface 3 at least one containment volume 16 of the portion P.
  • the supporting surface 3 is stationary.
  • the containment volume 16 is closed around the perimeter thereof, is delimited inferiorly by the supporting surface 3, and is open superiorly.
  • the frame structure 13 surrounds the pressing means 6, and the containment elements 14 are positioned between the frame structure 13 and the pressing means 6.
  • the pressing element 7 is adapted to fit inside the containment volume 16 during a pressing phase of the portion P.
  • the pressing element 7 is adapted to fit inside the containment volume 16, as a result of its movement close to the supporting surface 3.
  • the pad 9 is defined so as to fit to size inside the containment volume 16.
  • each of the containment elements 14 comprises at least one abutment portion 17 adapted to interact with the supporting surface 3, with the frame structure 13 in the operating position, and adapted to delimit the containment volume 16.
  • the abutment portion 17 is substantially in contact with the supporting surface 3 and is intended to laterally contact the ceramic material of the portion P and to contain it during pressing.
  • the abutment portion 17 of the containment elements 14 is movable with respect to the frame structure 13 along a direction of adjustment R.
  • the direction of adjustment R is transverse to the direction of sliding S.
  • the direction of adjustment R is substantially horizontal and perpendicular to the direction of sliding S.
  • the abutment portion 17 is movable between a release configuration and a containment configuration, wherein it is moved away from the frame structure 13 with respect to the release configuration so as to define the containment volume 16.
  • the abutment portions 17 of the containment elements 14 are moved close to each other.
  • the equipment 1 comprises movement means 18 of the abutment portion 17 between the release configuration and the containment configuration.
  • the containment elements 14 are associated in a movable manner with the frame structure 13 along the respective directions of adjustment R to bring the abutment portions 17 between the release configuration and the containment configuration.
  • the abutment portion 17 is made of a rigid material so as to counteract the pressing force exerted by the ceramic material during pressing.
  • the movement means 18 are of the mechanical type and comprise at least one fluid-operated actuator 19.
  • the fluid-operated actuator 19 is positioned between the frame structure 13 and the containment element 14.
  • the fluid-operated actuator 19 is of the pneumatic type.
  • the movement means 18 comprise a plurality of fluid-operated actuators 19 positioned between the containment element 14 and the frame structure 13.
  • the fluid-operated actuators 19 are operated synchronously so as to simultaneously move the containment elements 14.
  • the movement means 18 also comprise at least one guidance element 20 extending along the respective direction of adjustment R and adapted to guide and support the containment element 14 between the release configuration and the containment configuration.
  • the abutment portion 17 is of the expandable type.
  • the containment element is locked together with the frame structure 13 and the abutment portion 17 is expanded to delimit the containment volume 16.
  • the abutment portion 17 is retracted in the release configuration and expanded in the containment configuration.
  • the abutment portion 17 is made of an elastically deformable material.
  • the abutment portion 17 comprises a chamber 21 that can be supplied with a working fluid under pressure to move it from the release configuration to the containment configuration.
  • the movement means 18 are of the fluid-operated type and are adapted to inject the working fluid inside the chamber 21.
  • the movement means 18 are adapted to deliver the working fluid at a pressure such that it counteracts the pressure force exerted by the ceramic material during pressing.
  • the operation of the equipment 1 according to the invention is as follows.
  • the dispensing means 4 dispense the ceramic material onto the supporting surface 3 so as to form the continuous slab L to be compacted.
  • the hoppers 5 release the powdered ceramic material on the supporting surface 3 during the movement of the latter along the direction of forward movement D.
  • the continuous slab L is moved along the direction of forward movement D.
  • the supporting surface 3 stops so as to allow the portion P to be pressed.
  • the frame structure 13 is brought to the operating position, wherein it is brought close to the supporting surface 3.
  • the abutment portions 17 are moved to the containment configuration to delimit the containment volume 16.
  • the containment elements 14 are moved along the direction of adjustment R to move the abutment portions 17 mutually close to each other.
  • the chamber 21 of the abutment portion 17 is filled with a working fluid under pressure so as to expand the abutment portion itself.
  • the pressing operation is carried out and the pressing element 7 is moved close to the supporting surface 3 by crushing, with a force of predefined intensity, the portion P.
  • the pressing element 7 in its movement towards the supporting surface 3 fits inside the containment volume 16.
  • the pressing element 7 and the frame structure 13 move away from the supporting surface 3 to allow the compacted slab C to be released.
  • the supporting surface 3 is operated so as to simultaneously move the compacted slab C and the continuous slab L along the direction of forward movement D.
  • the compacted slab C which is therefore distinct and separate from the remaining part of the continuous slab L, is moved downstream of the pressing means 6, while a new portion P of the continuous slab L is arranged at the pressing means themselves so as to proceed with a further pressing phase.
  • the supply of the material so as to obtain a continuous slab reaching, without any interruption, the pressing means allows reducing to a minimum the time necessary for the preparation of the material to be pressed, the amount of which is determined by the working area of the pressing means themselves.
  • the presence of the containment means makes it possible to simplify the management of the material to be pressed, by carrying out a partial or total compartmentalization of a portion of the continuous slab which is intermittently supplied at the pressing means.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
EP21175624.2A 2020-05-29 2021-05-25 Équipement pour la fabrication de dalles en matériau céramique Withdrawn EP3915745A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202000012817 2020-05-29

Publications (1)

Publication Number Publication Date
EP3915745A1 true EP3915745A1 (fr) 2021-12-01

Family

ID=72178991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21175624.2A Withdrawn EP3915745A1 (fr) 2020-05-29 2021-05-25 Équipement pour la fabrication de dalles en matériau céramique

Country Status (2)

Country Link
EP (1) EP3915745A1 (fr)
ES (1) ES1292064Y (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2190046A5 (fr) * 1972-06-20 1974-01-25 Kolpishon Anna
US4133626A (en) * 1976-08-18 1979-01-09 Dorst-Keramikmaschinen-Bau Otto Dorst Und Dipl.-Ing. Walter Schlegel Press for pressing potlike articles from ceramic powder
EP0793565A1 (fr) * 1994-11-22 1997-09-10 Carlo Antonio Camorani Procede de compactage de poudres et appareil associe
EP1433580A2 (fr) * 2002-12-26 2004-06-30 Jian Xu Procédé et dispositif de fabrication de produits céramiques
ITMO20100268A1 (it) * 2010-09-27 2012-03-28 Gambarelli Impianti S R L Apparato per la formatura di manufatti sostanzialmente lastriformi.
WO2017158571A1 (fr) * 2016-03-18 2017-09-21 Siti - B&T Group S.P.A. Groupe de parois latérales mobiles pour une presse de produits en céramique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2190046A5 (fr) * 1972-06-20 1974-01-25 Kolpishon Anna
US4133626A (en) * 1976-08-18 1979-01-09 Dorst-Keramikmaschinen-Bau Otto Dorst Und Dipl.-Ing. Walter Schlegel Press for pressing potlike articles from ceramic powder
EP0793565A1 (fr) * 1994-11-22 1997-09-10 Carlo Antonio Camorani Procede de compactage de poudres et appareil associe
EP1433580A2 (fr) * 2002-12-26 2004-06-30 Jian Xu Procédé et dispositif de fabrication de produits céramiques
ITMO20100268A1 (it) * 2010-09-27 2012-03-28 Gambarelli Impianti S R L Apparato per la formatura di manufatti sostanzialmente lastriformi.
WO2017158571A1 (fr) * 2016-03-18 2017-09-21 Siti - B&T Group S.P.A. Groupe de parois latérales mobiles pour une presse de produits en céramique

Also Published As

Publication number Publication date
ES1292064U (es) 2022-06-21
ES1292064Y (es) 2022-09-12

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