Device for the cooling and extraction of preforms for the manufacture of plastic containers

A device for the cooling and extraction of preforms for the manufacture of plastic containers, the device comprising:

• at least one grip assembly which forms a plurality of receptacles for respective preforms and means for transferring the preforms that are still warm from an injection molding device to said grip assembly), comprising a cooling and extraction assembly which comprises a cooling plate arranged to face said grip assembly and configured to move on command between a position that is closer to said grip assembly and a position that is spaced from said grip assembly, said cooling plate supporting a plurality of cooling channels which are designed, with said cooling plate in said closer position, to lead into a respective preform accommodated in a respective receptacle in order to convey a jet of air inside said preform so as to increase a cooling rate of said preform, said cooling and extraction assembly comprising an unloading plate which is arranged on an opposite side of said grip assembly with respect to said cooling plate, and supports a plurality of grip bodies configured to be moved on command in order to pass through said cooling plate so as to engage selectively, with said cooling plate in the closer position, with a respective preform in order to allow extraction of said respective preform from the respective receptacle.