INJECTION MOLD OF A PLASTIC PREFORM

摘要

An injection mold (9') of a plastic preform comprising a first part (12) and a second part (13), fixed to each other, and a third part (14); wherein the third part (14) is provided with a molding cavity (41') defining an axis (?') and is adapted to be integrally fixed to a first surface of a supporting frame of the mold; wherein the second part (13), arranged between the third part and the first part, is adapted to slide along said axis to close or open the cavity; wherein the first part (12) comprises a longitudinal rod (55) adapted to slide along said axis (?') through a second surface of the supporting frame, opposite to and spaced apart from the first surface; wherein the second part (13) is provided with: - a guiding cage comprising a first plate (18), provided with a through hole through which the longitudinal rod can slide and configured to abut on said second surface; a structure (18"); parallel guiding rods (16) fixed at a first end thereof to said first plate and fixed at a second end thereof to the structure, - an assembly (19, 18', 49) sliding inside said cage, fixed at a first end thereof to the rod by means of quick-coupling means (15), and comprising at a second end thereof a punch (59) sliding inside the structure and defining a first complementary component of the cavity, wherein the structure (18") is provided with two half-collars (66', 66") and is configured so as to define, together with the punch, a cam system for opening or closing the two half-collars which define, when closed, a second complementary component of the cavity.