Nozzle for forming containers provided with an interchangeable tip in which elements matching the format of the neck of the container are embedded

摘要

A nozzle (10) for forming containers made of a thermoplastic material by injecting a pressurized fluid into a neck (14) of a preform (12), includes: a mounting (24) which is provided with an inlet pipe (36) for a pressurized fluid along a vertical axis (A); a nozzle tip (26) which axially extends the inlet pipe (36), and which can be sealingly coupled to the neck (14) of the preform (12) via at least one element (42, 44) matching the format of the neck (14); an element for removably attaching the nozzle tip (26) onto the mounting (24); and a stabilizing tube (106) resiliently biased toward the lower stop position thereof via a resilient member (116) that is permanently accommodated in the mounting.

主权项

1. A nozzle (10) for forming containers from thermoplastic material by injection of a pressurized fluid into a neck (14) of a pre-form (12), the nozzle (10) comprising:
a mounting (24) fitted with an inlet pipe (36) for pressurized fluid along a vertical axis (A); a nozzle tip (26) that axially extends the inlet pipe (36) and that can be connected sealingly to the neck (14) of the pre-form (12) by means of at least one stabilization tube (44) designed to be coaxial with the neck (14) of the pre-form (12), the diameter of which is such that a circular lower end edge (46) of the tube (44) is received against the lip (18) of the neck (14), the stabilization tube (44) being mounted slidingly and axially in the nozzle tip (26) between a lower stop position against a first stop face (47) of the tip (26) and an upper stop position against a second stop face (48) of the tip (26); removable means for attaching the nozzle tip (26) to the mounting (24);the stabilization tube (44) being embedded in the nozzle tip (26) regardless of the attachment thereof to the mounting (24);characterized in that the stabilization tube (44) is elastically pressed towards the lower stop position thereof by means of an elastic member (58) that is permanently housed in the mounting (24).