Patent ID: 8333579

Claim:
An apparatus ( 1 ) for making plastic containers by blow-moulding parisons comprising: a mould ( 2 ) having at least one moulding cavity; a base ( 3 ) mounted over the mould ( 2 ), forming at least one passage ( 4 ) connected to a high-pressure fluid source; a blow nozzle ( 7 ) forming at least one conduit and connected to a bottom face ( 5 ) of the base ( 3 ) to be positioned between the base ( 3 ) and the mould ( 2 ) in such a way that the conduit is in fluid communication with the passage ( 4 ) to receive the high-pressure fluid and convey it into the moulding cavity; fastening means for coupling and uncoupling the nozzle ( 7 ) to and from the base ( 3 ), wherein the fastening means comprise, in combination: at least one pin ( 10 ), protruding from the top of the blow nozzle ( 7 ) to be inserted into a respective through hole in the base ( 3 ) until an end portion ( 12 ) of it protrudes upwards from a top face ( 6 ) of the base ( 3 ); a fastening element ( 13 ) connected to the base ( 3 ) in such a way as to be movable from an unlocked position, where it does not interfere with the pin ( 10 ), to a locked position, where it is inserted in an end groove ( 14 ) defined by the end portion ( 12 ) of the pin ( 10 ), and vice versa.