A barrier spout having a base flange and an upstand portion. The base flange has a top surface, a bottom surface and an outer surface. The upstand portion has a proximal end extending from the base flange terminating at a distal end. An upper opening is defined at the distal end, and a lower opening is defined at the proximal end. The base flange and the upstand portion each comprise a three layer co-molded configuration including an outer layer, an inner layer and a central layer. The central layer has an oxygen transmission rate that is less than an oxygen transmission rate of either of the outer layer and the inner layer.

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).

An injection nozzle for use in an injection molding machine. The injection nozzle has a nozzle body. The nozzle body has a tip section, a nut section, a threaded section that are interposed between a first end and a second end. A conduit extends through the nozzle body between an intake orifice and an output orifice. Within the nozzle body, the conduit has a first zone and a second zone that meet at a transition area. The first zone extends into the nozzle body from the first end. The second zone extends into the nozzle body from the second end. Fins radially extend into the first zone of the conduit. The fins absorb heat from material passing through the first zone of the conduit. The fins can cause molten material to cool quicker in the first zone of the conduit than in the second zone of the conduit.

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).

An injection nozzle for use in an injection molding machine. The injection nozzle has a nozzle body. The nozzle body has a tip section, a nut section, a threaded section that are interposed between a first end and a second end. A conduit extends through the nozzle body between an intake orifice and an output orifice. Within the nozzle body, the conduit has a first zone and a second zone that meet at a transition area. The first zone extends into the nozzle body from the first end. The second zone extends into the nozzle body from the second end. Fins radially extend into the first zone of the conduit. The fins absorb heat from material passing through the first zone of the conduit. The fins can cause molten material to cool quicker in the first zone of the conduit than in the second zone of the conduit.

An injection molding nozzle tip includes a body extending along a central axis and having a front end and a rear end. A passage extends along the axis, through the body and forms a front opening at the front end, and a rear opening at the rear end. At least one fin extends radially inwardly from an inner surface of the passage.