hallmark isobarico for pelleting of ceramic tiles and method for the manufacture of said punch.

摘要

The isobaric punch (1) for pressing ceramic tiles (2) comprises a punch body provided with intercommunicating cavities (5) containing an incompressible fluid and having an end closed by an elastic membrane (4), the other end having a bottom portion provided with annular elastic positioning means (11; 20; 23) in contact with respective rigid inserts (9) inserted into the cavities themselves; the method comprises vulcanizing the elastic membrane onto the punch at such a pressure as not to deform the elastic means (11; 20; 23). IMAGE