Half-die for ceramic tiles

Details Half-die for ceramic tiles Half-die for ceramic tiles

1996-09-26

1998-07-28

Mackey, James P.

Plastic article or earthenware shaping or treating: apparatus

Means to create a vacuum or apply fluid pressure within a...

425406, 425DIG44, B28B 304

Patent

active

057860033

ABSTRACT:
The improved half-die comprises a concave rigid support describing a chamber superiorly closed by an elastic wall and containing a pressurised incompressible fluid. The chamber internally comprises a lattice which divides it into a plurality of cavities which are interconnected by means of communication holes; each cavity is occupied by an obturator which is solidly anchored to the elastic wall and free of the walls of the relative cavity. Should there be a loss of fluid pressure, which can occur only through an inlet hole and an outlet hole used for introducing the fluid during a construction phase of the half-die and subsequently closed, the obturators prevent any further fluid from exiting during a pressing operation and enable the half-die to keep working.

REFERENCES:
patent: 4349326 (1982-09-01), Foster et al.
patent: 5120213 (1992-06-01), Buhler et al.
patent: 5330346 (1994-07-01), Scardovi

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