(19)
(11) EP 0 701 889 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.07.1996 Bulletin 1996/28

(43) Date of publication A2:
20.03.1996 Bulletin 1996/12

(21) Application number: 95202233.3

(22) Date of filing: 18.08.1995
(51) International Patent Classification (IPC)6: B28B 3/02
(84) Designated Contracting States:
AT CH DE ES FR GB IT LI
Designated Extension States:
SI

(30) Priority: 13.09.1994 IT MO940127
11.10.1994 IT MO940141
28.12.1994 IT MO940175

(71) Applicant: Algeri, Maris
I-42010 Roteglia di Castellarano (Reggio Emilia) (IT)

(72) Inventor:
  • Algeri, Maris
    I-42010 Roteglia di Castellarano (Reggio Emilia) (IT)

(74) Representative: Gardi, Giuliano 
Gardipatent Palazzo Prora Via Giardini, 605
I-41100 Modena
I-41100 Modena (IT)

   


(54) Isostatic die for pressing ceramic tiles and method for manufacturing the tiles


(57) The isobaric die for pressing ceramic tiles comprises a semi-die (1) having a plate (6;39;42;48,48a) delimiting a cavity (7) of the semi-die (1) in which is contained an incompressible fluid (F) and anchored to the said semi-die (1) by means of an elastic component (2;68) sealing the incompressible fluid inside the said cavity, the said plate (6;39;42;48,48a) being free to perform limited displacements closer to, and further from, the bottom of the cavity (7), the plate (6;39;48,48a) being provided with openings (22a;40;43) passing through it.
This affords the particular advantage of obtaining uniform pressing whilst maintaining a substantially homogeneous thickness of the tile, due to the discontinuities in the plate (6;39;48;48a) acting in a differentiated manner on the various areas of the surface of the membrane (2;68) in function of the loads transmitted locally by the powders during pressing.






Search report