A nozzle tip for guiding a valve pin of a nozzle for injecting molten material into a mold during injection molding is described.

The nozzle tip consists 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, and 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.

To prevent or mitigate wear, 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.

An insert for an injection-molding nozzle of an injection-molding device, wherein the injection-molding nozzle has a nozzle body which extends in a longitudinal direction and in which at least one melt duct for a flowable compound to be processed is formed along the longitudinal direction between a first end and a second end, wherein the at least one melt duct opens into a mold impression, formed in the injection mold, of the injection-molding device. The insert has a main body which extends along the longitudinal direction. The main body of the insert has a portion which, in the mounted position of the insert in the injection-molding device, is arranged in the region of the second end of the nozzle body, and a second portion which, in the mounted position of the insert in the injection-molding device, is supported on a tool plate of the injection-molding device.

An injection molding machine nozzle capable of suppressing stringiness caused by unsolidified resin in the case where a mold is released in a short time and reducing a cycle time, is provided. An injection molding machine nozzle (10) includes a nozzle hole to eject molten resin from a hot runner (12). The injection molding machine nozzle (10) includes a nozzle tip (16) made of a material having higher heat conductivity than that of the hot runner (12) and including a nozzle hole (16B) communicating with a most downstream side of a resin flow path of the hot runner (12). The nozzle tip (16) is joined to the hot runner (12) through a heat insulation member (14).

A nozzle terminal for injectors of plastic material injection molding apparatus, includes an inner tubular body or tip and a ring nut. The tip includes a radially inner element made of a first material and a radially outer element made of a second material arranged at contact with the radially inner element at an intermediate portion thereof terminating at a distance from the distal end thereof. The ring nut fully covers the radially outer element, insulating it from the environment.

An injection molding machine nozzle capable of suppressing stringiness caused by unsolidified resin in the case where a mold is released in a short time and reducing a cycle time, is provided. An injection molding machine nozzle (10) includes a nozzle hole to eject molten resin from a hot runner (12). The injection molding machine nozzle (10) includes a nozzle tip (16) made of a material having higher heat conductivity than that of the hot runner (12) and including a nozzle hole (16B) communicating with a most downstream side of a resin flow path of the hot runner (12). The nozzle tip (16) is joined to the hot runner (12) through a heat insulation member (14).

A nozzle terminal for injectors of plastic material injection moulding apparatus, includes a tubular tip defining a flow passage for the injected plastic material and including a radially inner element made of a first abrasion resistant material, an intermediate element made of a second high thermal conductivity material, and a radially outer element made of a third corrosion resistant material. The radially inner, intermediate and radially outer elements are joined to each other in intimate mutual contact, and the radially outer element fully covers the intermediate element thus insulating it from the environment.

The disclosure relates to an insert for use in an injection molding nozzle, with an insert body at least made from a high thermal conductivity material, in which at least one flow channel is formed with an inlet opening and an outlet opening, wherein the insert body comprises a neck section, for joining to the injection molding nozzle, an end section, for inserting into a mold cavity of a mold insert, and a flange with a stopping surface projecting radially with respect to the end section, wherein the stopping surface is formed on a surface of the radially projecting flange facing the outlet opening. According to the disclosure, the stopping surface and the end section have at least partly an outer coating made of a second material with a low thermal conductivity.

A nozzle terminal for injectors of plastic material injection moulding apparatus, includes an inner tubular body or tip and a ring nut. The tip includes a radially inner element made of a first material and a radially outer element made of a second material arranged at contact with the radially inner element at an intermediate portion thereof terminating at a distance from the distal end thereof. The ring nut fully covers the radially outer element, insulating it from the environment.

A nozzle terminal for injectors of plastic material injection moulding apparatus, includes a tubular tip defining a flow passage for the injected plastic material and including a radially inner element made of a first abrasion resistant material, an intermediate element made of a second high thermal conductivity material, and a radially outer element made of a third corrosion resistant material. The radially inner, intermediate and radially outer elements are joined to each other in intimate mutual contact, and the radially outer element fully covers the intermediate element thus insulating it from the environment.

A structure applicable/applied to the end of an injector for injection molding of molten material is described. The structure comprises from the inside out: a nozzle tip formed of a first, second and third portions defining a channel inside the nozzle tip for molten material to be injected, a sleeve or overlay mounted on the external surface of the nozzle tip to enclose it in correspondence with the first portion, the third portion and partially the second portion, a cup-shaped terminal member and a ring nut.