EP1669176A2 - Installation améliorée pour la fabrication de carreaux ou de dalles en céramique - Google Patents

Installation améliorée pour la fabrication de carreaux ou de dalles en céramique Download PDF

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Publication number
EP1669176A2
EP1669176A2 EP05077746A EP05077746A EP1669176A2 EP 1669176 A2 EP1669176 A2 EP 1669176A2 EP 05077746 A EP05077746 A EP 05077746A EP 05077746 A EP05077746 A EP 05077746A EP 1669176 A2 EP1669176 A2 EP 1669176A2
Authority
EP
European Patent Office
Prior art keywords
plant
main body
longitudinal
belt
longitudinal core
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Withdrawn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
EP05077746A
Other languages
German (de)
English (en)
Other versions
EP1669176A3 (fr
Inventor
Alessandro S.C.M.I.S.C. Cocquio
Silvano S.C.M.I.S.C. Valli
Alan S.C.M.I.S.C. Babini
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.)
Sacmi Imola SC
Original Assignee
Sacmi Imola SC
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 Sacmi Imola SC filed Critical Sacmi Imola SC
Publication of EP1669176A2 publication Critical patent/EP1669176A2/fr
Publication of EP1669176A3 publication Critical patent/EP1669176A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
    • 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
    • B28B3/12—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material
    • B28B3/123—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material on material in moulds or on moulding surfaces moving continuously underneath or between the rollers, e.g. on an endless belt

Definitions

  • the present invention concerns, in general, a plant for manufacturing ceramic tiles or slabs, and in particular a plant for forming the aforementioned slabs.
  • Plants for forming ceramic slabs comprise a conveyor belt suitable for making a continuous strip of powdered ceramic material advance through a pressing station, which is equipped with two motorised compacting devices one on top of the other that allow the powders to be continuously pressed on the belt that advances in the station, to obtain an article of coherent material.
  • said article is trimmed at the edges and divided into tesserae that, according to the degree of pressing to which the powders on the belt are subjected, can make the end tiles, or else a group of precompacted slabs that will have to be subjected to a second pressing.
  • the pressing stations of known plants also comprise means suitable for controlling the spontaneous expansion of the strip of compacted powders, downstream of the compacting devices, to avoid the occurrence of cracks and/or splits, and means suitable for laterally containing the powdered material on the conveyor belt.
  • said lateral containment means consist of two longitudinal walls that, parallel to each other and arranged above the conveyor belt along the advancing direction, accompany the powders during their transportation towards the compacting devices, during the pressing step, in which they are also squashed by said compacting devices, until the end of the expansion step.
  • Said containment walls are generally elastically deformable: in the direction perpendicular to the belts, so as not to significantly oppose the action of the compacting devices, ensuring the substantial uniformity of the pressure exerted by them on the entire strip of powdered ceramic material; and in the direction transversal to the belts, to accompany the subsequent linear expansion of the compacted article in the sense of its width, i.e. perpendicular to the direction in which the conveyor belt advances.
  • a particularly serious drawback of such containment walls lies in the fact that their deformability is incompatible with the need to make a stable and strong lateral support for the strip of powdered material, both during the transportation step and, in particular, during the pressing step.
  • the containment walls are also subjected to the laterals thrusts caused by the powders being compacted, which they must oppose without deforming or flexing excessively, to ensure a good compacting of the article also at the longitudinal edges.
  • the purpose of the present invention is that of overcoming the aforementioned drawback, providing means for laterally containing the powders on the conveyor belt capable of deforming in the direction perpendicular to the belts without offering great resistance and, at the same time, of providing a stable lateral support for the strip of powdered material during transportation and pressing.
  • a further purpose of the invention is to achieve the aforementioned objective with a simple, rational and low-cost solution.
  • Such purposes are accomplished through a plant for forming ceramic tiles or slabs comprising at least two containment walls of the powders on the conveyor belt, each of which comprises a main body with high elastic deformability and at least one longitudinal core having modulus of elasticity of over 1000 N/mm 2 that, associated with said main body, extends substantially for the entire length thereof.
  • said main body allows each containment wall to squash adequately during pressing, whereas the longitudinal core gives them the rigidity necessary for making it a sufficiently stable lateral support for the strip of powdered material.
  • said longitudinal core is configured so as to be transversally flexible, and the plant comprises suitable tensioning means to tauten the longitudinal core itself, so as to cause its transversal rigidification and, therefore, the transversal rigidification of the containment wall as a whole.
  • said containment wall in the form of a belt that, wound in a closed loop on suitable pulleys, can be made to run at the same speed as the conveyor belt, avoiding sliding between the powdered material that advances and the containment wall itself.
  • the plant in object is also equipped with means suitable for ensuring that, during operation, the containment walls always remain parallel to each other and spaced apart by the same amount, so that the width of the article going out is constant.
  • the plant 1 which comprises a motorised conveyor belt 2 on which, through normal devices, not illustrated since they are per se known, a continuous strip 100 of powders is deposited.
  • the belt 2 crosses a pressing station 3 that has the function of pressing the powders of the strip 100 to obtain an article, substantially parallelepiped in shape, of coherent material.
  • Such an article can possibly then be decorated and then divided into tesserae of suitable size according to the size of end product that one wishes to obtain, said tesserae being able to be subsequently subjected to a second pressing step.
  • the pressing station 3 comprises two compacting devices 4 and 5, motorised and opposite one another, the first of which is arranged below the belt 2, and the second above it at a height from the belt 2 that can be adjusted according to the thickness of the strip 100 of powders to be compacted, as well as the pressure value at which one wishes to carry out the pressing.
  • Each of the compactors 4 and 5 is provided with a motorised roller and an idle roller, respectively indicated with reference numerals 40, 41 and 50, 51, on which a respective belt 42, 52 is wound.
  • two roller conveyors 43, 53 are arranged, consisting of a plurality of idle rollers, downstream of which there are two opposite rollers 6 and 7 that have the function of keeping the belts 42 and 52 pressed to press the strip 100 of powdered material.
  • the roller conveyor 53 is inclined in the direction in which the belt 2 advances so as to make the compacting of the powders of the strip 100 gradual.
  • the rollers 6 and 7 define the pressing area of the strip 100 of powders, downstream of which there are two overlapping plates 16 and 17, the bottom one of which 17 is arranged below the belt 2 and the top one of which 16 is arranged above the belt 2, and in greater detail in contact with the belt 52, said plates 16 and 17 being suitable for controlling the expansion of the strip 100 of powders, to avoid the occurrence of cracks or splits in the compacted article.
  • the pressing station 3 also comprises lateral containment means of the strip 100 of powders, which, in the illustrated embodiment, are made through two belts 8 and 9 in a closed loop that, wound on the compacting device 5 and on idler wheels 101, 102 and 103, are suitable for running at the same speed as the conveyor belt 2 (see also fig. 2).
  • said belts 8 and 9 have two respective bottom portions in contact with the conveyor belt 2, which make a pair of containment walls that, parallel to each other and arranged along the direction in which the belt 2 itself advances, are suitable for laterally containing the powders of the strip 100, following it from the deposition on the belt up until the end of the expansion step and passing through the pressing step, during which said bottom portions are squashed by the compactors 4 and 5 together with said strip 100 of powdered material (see fig. 2).
  • each of said belts 8 and 9 is crossed, for its entire extension, by a longitudinal recess, 83 and 93 respectively, which is suitable for coupling with an annular ribbing 104 projecting from the idler wheels 101, 102, 103, with them making a shape coupling of the male/female type that forces the belt to always rotate in the same vertical plane (in the figures just the ribbing 104 of the wheel 101 can be seen, the others being analogous).
  • the belts 8 and 9, which define the lateral containment walls of the powders on the belt 2 are substantially parallel to each other and spaced apart by the same amount, so that the width of the strip 100 of compacted powders remains constant during production.
  • the idler wheels 101, 102 and 103 are with adjustable gage, so as to be able to vary the size of the strip of compacted powders in the direction perpendicular to that in which the belt 2 advances according to the format that one wishes to obtain, and so that the relative position of the idler wheels can be adjusted to compensate possible permanent stretching of the belts 8 and 9.
  • the belts 8 and 9 consist of an elastically deformable main body, 80 and 90 respectively, and at least one rigid longitudinal core, 81 and 91, which, associated with said main body, extends for the entire length of the belt.
  • said longitudinal cores 81 and 91 are fixed to the respective main bodies 80 and 90 with means that do not alloy mutual longitudinal sliding, for example through a glue.
  • the main bodies 80 and 90 must be able to reduce its initial size by at least 30% without permanent deformations and, for this reason, must be made from a material having a high elastic working range; moreover, they must also be sufficiently yielding so as not to hinder the compacting means 4 and 5 during pressing and, therefore, the aforementioned material must have a low modulus of elasticity: less than 100 N/mm 2 and, preferably, less than 10 N/mm 2 .
  • the longitudinal cores 81 and 91 must be made from a material having a high modulus of elasticity so as not to deform from the lateral thrusts generated by the powders being compacted, said modulus of elasticity being greater than 1000 N/mm 2 and, preferably, greater than 10,000 N/mm 2 .
  • said longitudinal cores 81 and 91 are configured so as to be transversally flexible (see figs. 3 to 8), so that the belts 8 and 9 are sufficiently flexible to be wound around the compacting device 5 and the idler wheels 101, 102, 103 describing a closed loop path.
  • the plant 1 comprises a jack device 104 that, associated with the idler rollers 101, acts as tensioning means suitable for sufficiently tautening the belts 8 and 9 to rigidify the cores 81 and 91.
  • said device 104 is able to adjust the position of the idler rollers 101 to compensate possible permanent stretching of the belts 8 and 9, automatically controlling the tensioning force to which the longitudinal cores 81 and 91 are subjected.
  • the belt 8 (although the same considerations are also valid for the belt 9) can comprise just one longitudinal core 81 (figs. 3, 4, 7 and 8), or else it can comprise a plurality of longitudinal cores 81 (figs. 5 and 6).
  • the longitudinal core 81 can be enclosed inside the main body 80 (fig. 7), or else housed in corresponding seats formed in the outer profile of the main body 80 itself.
  • cross section of the belts is configured so as to ensure that, during the expansion step, they do not interfere in any way with the longitudinal edges of the compacted article but, instead, help their expansion avoiding the occurrence of cracks or splits.
  • the opposite faces 82 and 92, respectively of the belt 8 and 9 are inclined with respect to the plane of the conveyor belt 2, so that the tangent to their transversal profile, at any point thereof, forms an acute angle ⁇ with the plane of the conveyor belt facing towards the strip of powdered material, said angle being preferably between 40° and 89°.
  • said transversal profile of the opposite faces 82 and 92 can be a rectilinear segment (as illustrated in the figures), or else it can alternatively consist of a curvilinear portion, a succession of rectilinear portions, or a combination of curvilinear and rectilinear portions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Finishing Walls (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Belt Conveyors (AREA)
EP05077746A 2004-12-10 2005-12-01 Installation améliorée pour la fabrication de carreaux ou de dalles en céramique Withdrawn EP1669176A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITRE20040151 ITRE20040151A1 (it) 2004-12-10 2004-12-10 Impianto perfezionato per la formatura di lastre o piastrelle ceramiche

Publications (2)

Publication Number Publication Date
EP1669176A2 true EP1669176A2 (fr) 2006-06-14
EP1669176A3 EP1669176A3 (fr) 2006-11-08

Family

ID=36050720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05077746A Withdrawn EP1669176A3 (fr) 2004-12-10 2005-12-01 Installation améliorée pour la fabrication de carreaux ou de dalles en céramique

Country Status (4)

Country Link
EP (1) EP1669176A3 (fr)
CN (1) CN1785633A (fr)
IT (1) ITRE20040151A1 (fr)
RU (1) RU2385803C2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1402937B1 (it) * 2010-10-28 2013-09-27 System Spa Struttura per presse in particolare per la formatura di prodotti ceramici.
ITRE20110081A1 (it) * 2011-10-07 2013-04-08 Sacmi Dispositivo e metodo per il trattamento di uno strato di materiale in polvere
CN109262808B (zh) * 2018-11-02 2024-01-09 佛山市三水区广顺自动化设备有限公司 一种辊式液压预压机及布料生产线

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770977A (en) * 1953-11-27 1956-11-20 Continental Gummi Werke Ag Belt transmissions
US3462795A (en) * 1967-09-18 1969-08-26 Admiral Equipment Corp Double belt for manufacture of panels and the like
US3528126A (en) * 1967-05-26 1970-09-15 Hennecke Gmbh Maschf Continuous production apparatus for hard core foam plates having rigid cover layers particularly on a polyurethane base
DE1936684A1 (de) * 1969-07-18 1971-02-04 Kunststoff Verfahrenstechnik D Verfahren und Vorrichtung zur fortlaufenden Herstellung von Schaumstoffbahnen,insbesondere auf Polyurethanbasis
US4573404A (en) * 1983-04-28 1986-03-04 Kurt Held Continuous-acting press with multi-layered press bands
WO1998023424A2 (fr) * 1996-11-22 1998-06-04 Carlo Antonio Camorani Fabrication de matieres pulverulentes
US6322346B1 (en) * 1997-03-14 2001-11-27 Valmet Panelboard Gmbh Device for continuous production of plate-shaped products
SE516764C2 (sv) * 1996-12-24 2002-02-26 Berndorf Band Gmbh Dubbelbandpress, ändlöst stålband samt förfarande för framställning av ett stålband för en dubbelbandpress
EP1356909A2 (fr) * 2002-04-24 2003-10-29 SACMI COOPERATIVA MECCANICI IMOLA Soc. Coop. a r.l. Procédé et installation pour la fabrication de carreaux ou dalles en céramique

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770977A (en) * 1953-11-27 1956-11-20 Continental Gummi Werke Ag Belt transmissions
US3528126A (en) * 1967-05-26 1970-09-15 Hennecke Gmbh Maschf Continuous production apparatus for hard core foam plates having rigid cover layers particularly on a polyurethane base
US3462795A (en) * 1967-09-18 1969-08-26 Admiral Equipment Corp Double belt for manufacture of panels and the like
DE1936684A1 (de) * 1969-07-18 1971-02-04 Kunststoff Verfahrenstechnik D Verfahren und Vorrichtung zur fortlaufenden Herstellung von Schaumstoffbahnen,insbesondere auf Polyurethanbasis
US4573404A (en) * 1983-04-28 1986-03-04 Kurt Held Continuous-acting press with multi-layered press bands
WO1998023424A2 (fr) * 1996-11-22 1998-06-04 Carlo Antonio Camorani Fabrication de matieres pulverulentes
SE516764C2 (sv) * 1996-12-24 2002-02-26 Berndorf Band Gmbh Dubbelbandpress, ändlöst stålband samt förfarande för framställning av ett stålband för en dubbelbandpress
US6322346B1 (en) * 1997-03-14 2001-11-27 Valmet Panelboard Gmbh Device for continuous production of plate-shaped products
EP1356909A2 (fr) * 2002-04-24 2003-10-29 SACMI COOPERATIVA MECCANICI IMOLA Soc. Coop. a r.l. Procédé et installation pour la fabrication de carreaux ou dalles en céramique

Also Published As

Publication number Publication date
CN1785633A (zh) 2006-06-14
RU2005137235A (ru) 2007-06-10
RU2385803C2 (ru) 2010-04-10
EP1669176A3 (fr) 2006-11-08
ITRE20040151A1 (it) 2005-03-10

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