US 12,330,355 B2
Nozzle tip for injection molding
Pierangelo Bruniera, San Polo di Piave (IT); and Alessandro Dario, San Polo di Piave (IT)
Assigned to INGLASS S.P.A., San Polo di Piave (IT)
Filed by INGLASS S.P.A., San Polo di Piave (IT)
Filed on Dec. 20, 2022, as Appl. No. 18/084,691.
Claims priority of application No. 102021000031877 (IT), filed on Dec. 20, 2021.
Prior Publication US 2023/0191674 A1, Jun. 22, 2023
Int. Cl. B29C 45/20 (2006.01); B29C 45/62 (2006.01)
CPC B29C 45/20 (2013.01) [B29C 45/62 (2013.01)] 17 Claims
OG exemplary drawing
 
1. Nozzle tip for guiding a valve pin of a nozzle for injecting molten material into a mold during injection molding, consisting of:
an outer member, provided with an axial pass-through cavity, which at one end comprises a central pass-through conduit for the exit of the molten material,
an inner member, having an axial pass-through cavity, which is coaxially mounted within the outer member and comprises a tapered tip with a hole to direct the molten material to the central conduit,
an annular-shape insert made of wear-resistant material, with a central pass-through cavity into which the valve pin can slide and mounted in correspondence with the central pass-through conduit,
wherein the central pass-through cavity of the insert is constituted of the juxtaposition of a cylindrical-shape cavity portion and a conical-shape cavity portion, and
the insert is a separate piece and directly interposed between the tapered tip of the inner member and an inner surface of the outer member so that said tapered tip abuts against the inlet of the conical-shape cavity portion at a zone of mutual contact.