A side-gate injection molding apparatus and a side-gate nozzle assembly are disclosed. The side-gate nozzle assembly delivers moldable material to a cavity insert that is beside the side-gate nozzle assembly. The side-gate nozzle assembly includes a nozzle body having a nozzle flow channel and a widthwise slot extending across a downstream side of the nozzle body. The nozzle flow channel has an outlet that ends at a wall of the slot. A load component is received in the slot and has a load component flow channel in fluid communication between the nozzle body outlet and an outlet at an end of the load component. A side-gate tip assembly is adjacent to the end of the load component and is in fluid communication between the load component flow channel and the cavity insert. In operation, thermal expansion of the load component presses the side-gate tip assembly towards the cavity insert.

A modular barrel and screw assembly for use in injection molding including a barrel having a barrel body, a separate barrel injection portion and a separate barrel end cap, with the barrel end cap being removably connected to the barrel injection portion and the barrel injection portion being removably connected to the barrel body, and a screw assembly having a screw tip assembly removably connected to a screw portion, wherein an injection chamber having a shot volume is defined by the barrel injection portion, the barrel end cap and the screw tip assembly. The modular barrel and screw assembly enables servicing of the barrel injection portion, barrel end cap and/or screw tip assembly without requiring removal of the barrel body, and enables use of a plurality of alternative corresponding separate barrel injection portions, separate barrel end caps and tip assemblies that provide a plurality of different shot volumes.

An injection molding hot runner system adapted for leak detection during injection molding includes a manifold and a housing surrounding the manifold, wherein the manifold and the housing are spaced apart defining one or more pockets, the manifold comprises at least one junction point establishing a connection to a component attached to the manifold, wherein at the at least one junction point a sensor is located in the pocket, wherein the sensor is configured to indicate a leak when getting in contact with the molten plastic due to a leak at the junction point.

A manifold device for an injection-molding nozzle for an injection-molding tool has a main manifold channel for an injection-molding compound, which main manifold channel extends from an inlet opening into the manifold device as far as at least two transfer openings, and at least two manifold channels for the injection-molding compound, which manifold channels each extend from a transfer opening to an outlet opening and are each fluidically connected by a transfer opening to the main manifold channel. Also disclosed are an injection-molding nozzle with such a manifold device and an injection-molding tool with such an injection-molding nozzle.

The present application describes injection molding machines and, more particularly, a removable nozzle tip and nozzle assembly for use with an injection molding machine and an engagement tool and methods for replacing a nozzle tip. In an aspect, an injection molding machine may include a nozzle. The nozzle may include a nozzle housing and a nozzle tip threadably attached to the nozzle housing. At least a portion of an exterior wall of the nozzle housing and at least a portion of an exterior wall of the nozzle tip may align to provide a cylindrical surface. The injection molding machine may further include a tubular heater enclosing at least a portion of the continuous cylindrical surface. The nozzle tip does not include a torque feature in any location that is downstream of the tubular heater and upstream of a mold gate of the nozzle.

An injection molding apparatus comprising: a manifold, a nozzle, A distal tip of the nozzle being comprised of a highly heat conductive insert and an insulation cap that is substantially less heat conductive than the insert, the downstream end portion of the insulation cap being disposed between the gate and the downstream end portion of the highly heat conductive insert forming a fluid seal around the gate, a valve pin, wherein when the valve pin is in a gate closed position, an axially interior surface of a fluid exit aperture of the insulation cap surrounds a gap enabling circumferential surface of the valve pin forming a spatial gap immediately upstream of the gate between the interior surface of the fluid exit aperture of the insulation cap and the gap enabling circumferential surface of the valve pin.

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 injector includes a nozzle provided with a valve seat, a valve body which is seated on or separated from the valve seat, and a displacement means for displacing the valve body. A resin flow passage through which molten resin flows is formed inside the nozzle. The resin flow passage includes a cross-sectional area varying portion having a cross-sectional area, in a direction orthogonal to a flow direction, which varies with increasing distance toward or away from the valve body. The displacement means is capable of stopping the valve body in any position in the cross-sectional area varying portion.

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.

A co-injection nozzle is disclosed that includes a combining means configured to reduce shear heating and create a more even shear heating profile in core and skin material flow streams. The combining means is configured to reduce shear heating peaks and valleys in core and skin material flow streams as the streams flow between annular channels of the combining means during a mold filling process.