APPARATUS FOR FORMING OBJECTS

摘要

An apparatus for compression-moulding preforms from a dose (D) of plastics comprises punch means (12), die means (13) provided with a cavity and at least two die elements (22) which are mutually movable between a contact position and a detached position. The punch means (12) comprising a punch (14) suitable for being inserted into the cavity and a pressing sleeve (31) mounted slidably around the punch (14) to maintain said at least two die elements (22) in said contact position. The punch means (12) further comprises jacket means (91) arranged for receiving said punch (14) and said pressing sleeve (31) and at least a first chamber (42, 57), containing a first fluid at a first pressure and acting on said pressing sleeve (31), which is entirely bounded by said pressing sleeve (31) and by said jacket means (91) so as to enable said punch to be dismantled from said punch means (12), maintaining said first chamber (42, 57) pressurised.