EP0524666B1 - Dalle en céramique formée par pression pour sols ou parements - Google Patents

Dalle en céramique formée par pression pour sols ou parements Download PDF

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Publication number
EP0524666B1
EP0524666B1 EP92200500A EP92200500A EP0524666B1 EP 0524666 B1 EP0524666 B1 EP 0524666B1 EP 92200500 A EP92200500 A EP 92200500A EP 92200500 A EP92200500 A EP 92200500A EP 0524666 B1 EP0524666 B1 EP 0524666B1
Authority
EP
European Patent Office
Prior art keywords
tile
ridges
rear face
face
pressing
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
EP92200500A
Other languages
German (de)
English (en)
Other versions
EP0524666A1 (fr
Inventor
Vilio 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.)
GRANITIFIANDRE SpA
Original Assignee
GRANITIFIANDRE 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 GRANITIFIANDRE SpA filed Critical GRANITIFIANDRE SpA
Publication of EP0524666A1 publication Critical patent/EP0524666A1/fr
Application granted granted Critical
Publication of EP0524666B1 publication Critical patent/EP0524666B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/08—Flooring or floor layers composed of a number of similar elements only of stone or stone-like material, e.g. ceramics, concrete; of glass or with a top layer of stone or stone-like material, e.g. ceramics, concrete or glass
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/14—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements stone or stone-like materials, e.g. ceramics concrete; of glass or with an outer layer of stone or stone-like materials or glass
    • E04F13/142—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements stone or stone-like materials, e.g. ceramics concrete; of glass or with an outer layer of stone or stone-like materials or glass with an outer layer of ceramics or clays

Definitions

  • This invention relates to the forming of ceramic flooring or facing tiles by pressing ceramic material based on clay, feldspar and quartz.
  • such tiles are formed by being pressed in moulds and then subjected to thermal treatment, with possible surface coating layers on their front (exposed) face.
  • Deaeration is achieved in practice by applying a first pressing action to the material at a relatively slow rate (followed by further fast pressings) to allow the air to escape as completely as possible. It happens that if a certain rate is exceeded, this depending not only on the type of material and tile area but also on other lesser factors, said air pockets begin to be present in an increasing percentage. There is therefore a limit to the frequency of the press operating cycles, which cannot be exceeded.
  • the object of the present invention is to provide a tile, particularly but not exclusively to be formed from atomized materials and having a relatively large surface area (exceeding 400 cm2), in which a more effective deaeration is obtained during the pressing stage than in the case of known tiles, and hence such as to allow a higher pressing rate, while maintaining the technical characteristics and geometrical form typical of usual tiles unaltered.
  • the rear faces of a known type comprise grid ribbing formed from thin raised ridges parallel to one side of the tile; see for example US-A-2255712.
  • Another type which is presently longely in use, has ridges parallel to one side. which intersect with identical ridges parallel to the other side.
  • This configuration which is shown by way of example in Figure 1, fulfils structural functions and provides a better grip for the tile against the surface to which it is fixed.
  • This configuration also allows the tiles to roll smoothly and without jolting along the rollers of current motorized-roller drying ovens and/or firing kilns.
  • the configuration shown in Figure 1 is the best known configuration with regard to technical and functional advantages.
  • the tile of the present invention has identical technical and functional characteristics to those of the known art, it also considerably and unexpectedly improves its intrinsic capacity for evacuating air from the material during pressing.
  • the present invention is described hereinafter with reference to the accompanying figures, which illustrate a preferred but not exclusive embodiment thereof.
  • Figure 2 is a top plan view of the rear major face of the tile according to the invention.
  • Figure 3 is an enlarged detail of the section on the generic transverse plane III-III of Figure 2.
  • the present invention is based on the form of the rear major tile face (indicated by 2 in the figures), which comprises a plurality of continuous projecting ridges 3 alternating with corresponding continuous furrows 4, distributed regularly over the entire tile face 2, said ridges 3 and furrows 4 being arranged geometrically, when viewed in plan, such that ridges 3 do not intersect other ridges 3 and furrows 4 do not intersect other furrows 4 (ie so as not to form cross-overs), and that all reach the perimetral edge 6 of the tile.
  • the geometrical plan arrangement of said ridges 3 and furrows 4 on the rear face 2 comprises an ideal division of the tile into several parts by means of two or more axes of symmetry of the face 2, in each of said ideal parts the ridges 3 and furrows 4 lying substantially parallel to each other and directed from the central region towards the periphery.
  • said ideal division is obtained by the two central axes A and B of the face 2, in each of the four ideal parts obtained the ridges 3 and the furrows 4 being substantially parallel to that diagonal of the face 2 which passes through the respective ideal part.
  • the ridges 3 of two adjacent ideal parts are joined together in pairs by a ridge portion 3'at those ends close to the central axes A and B.
  • the arrangement of the ridges 3 on the face 2 is such that any section through the tile taken on a plane parallel to one of the two axes A and B intersects a number of ridges 3.
  • the cross-sectional shape of the ridges 3 can be of any type, for example trapezium shaped as the ridges of known tiles; the dimensions (height and width) of these ridges are also substantially equal to those of the ridges of known tiles, ie about one millimetre in height and a few millimetres in width.
  • a perimetral ridge 5 is provided, its presence being dictated by structural reasons in that it considerably favours planarity of the major faces of the tile.
  • the perimetral ridge 5 does not however create a large obstacle to air evacuation, although for this reason it would be preferable that it were absent.
  • Tiles with surface dimensions of 30 cm x 30 cm were pressed using a SITI 1500 T press acting simultaneously on three moulds (ie a multiple mould with three impressions); said moulds are of the so-called "mirror" type with the upper punch defining the front face of the tile, and mobile together with the perimetral die, the lower punch being fixed.
  • the percentage of tiles manifesting at least one small internal air pocket (bubble) was as follows:
  • the second test was conducted in the same manner as the 1st test but using a SITI 1700 T press acting simultaneously on two "mirror-plate" moulds for tiles with surface dimensions of 40 cm x 40 cm (again at a frequency of 11.5 cycles per minute).
  • the percentage of defective tiles was as follows:

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Finishing Walls (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Floor Finish (AREA)

Claims (4)

  1. Carreau en céramique de sol ou de revêtement formé par pressage, comprenant sur sa plus grande face arrière une série continue d'arêtes saillantes alternées à autant de rainures continues, distribuées régulièrement et entièrement sur la plus grande face arrière du carreau. Ces arêtes, vues en section sont disposées géométriquement, de façon à ce qu'elles ne se coupent pas entre elles et de façon à atteindre le bord périmétral du carreau. La où la face arrière du carreau présente au moins deux axes de symétrie (A, B) perpendiculaires aux bords du carreau, caractérisé par le fait que pour améliorer la désaération durant la phase de pressage du carreau, la disposition géométrique en section des arêtes est telle que dans chaque partie de la face arrière, définie comme la zone comprise entre deux axes consécutifs des dits axes de symétrie (A, B), les arêtes sont placées de façon substantiellement parallèles entre elles et par rapport à la diagonale de la face arrière qui passe à travers ladite partie ou par rapport à la bisectrice de l'angle de la partie idéale comprise entre les deux axes (A, B).
  2. Carreau selon la revendication 1 de forme rectangulaire, caractérisé par le fait que dans chacune des quatre parties idéales de la face arrière qui est comprise entre deux axes de symétrie (A, B) perpendiculaires au bord du carreau, les arêtes et les rainures sont substantiellement parallèles à la diagonale de la face arrière qui passe à travers ladite partie respective.
  3. Carreau selon la revendication 3, caractérisé par le fait que lesdites arêtes sont liées par paires aux extrémités proches desdits axes centraux.
  4. Carreau selon la revendication 2, caractérisé par le fait que toutes les sections qui traversent le carreau parallèlement à un des deux axes centraux, coupent un nombre constant d'arêtes.
EP92200500A 1991-07-24 1992-02-20 Dalle en céramique formée par pression pour sols ou parements Expired - Lifetime EP0524666B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE910053 1991-07-24
ITRE910053A IT1252742B (it) 1991-07-24 1991-07-24 Piastrella in materiale ceramico per pavimenti o rivestimenti realizzato mediante pressatura.

Publications (2)

Publication Number Publication Date
EP0524666A1 EP0524666A1 (fr) 1993-01-27
EP0524666B1 true EP0524666B1 (fr) 1995-11-02

Family

ID=11398043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92200500A Expired - Lifetime EP0524666B1 (fr) 1991-07-24 1992-02-20 Dalle en céramique formée par pression pour sols ou parements

Country Status (4)

Country Link
EP (1) EP0524666B1 (fr)
AT (1) ATE129770T1 (fr)
DE (1) DE69205746D1 (fr)
IT (1) IT1252742B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2761095B1 (fr) * 1997-03-19 1999-05-07 Siplast Sa Structure de dalle pour revetement de terrasse et revetement constitue au moyen de telles dalles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR35191E (fr) * 1928-04-06 1929-12-17 Système de dalles et dallages pour ateliers, etc.
US2255712A (en) * 1940-07-18 1941-09-09 Olean Tile Company Tile
US5208086A (en) * 1988-04-05 1993-05-04 Owens Charles R Laminated tile product, method for producing the same and method for installing the same
US5062913A (en) * 1988-04-05 1991-11-05 Charles R. Owens Laminated tile product and method for producing the same

Also Published As

Publication number Publication date
ITRE910053A0 (it) 1991-07-24
DE69205746D1 (de) 1995-12-07
IT1252742B (it) 1995-06-28
ATE129770T1 (de) 1995-11-15
ITRE910053A1 (it) 1993-01-24
EP0524666A1 (fr) 1993-01-27

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