The present disclosure provides a molding machine and a method of molding a part. The molding machine may include multiple molding systems (e.g., extruders) for pumping molten material into one or more mold cavities. The multiple molding systems may pump the same material or different materials into the one or more mold cavities. The multiple molding systems may be individually and/or collectively controlled. A method of molding a part may include pumping material into one or more mold cavities via multiple molding systems, ceasing pumping material into the one or more mold cavities when one or more pressures associated with the multiple molding systems are achieved, and releasing a molded part from the one or more mold cavities after the one or more pressures are achieved.

The present disclosure provides a molding machine and a method of molding a part. The molding machine may include multiple molding systems (e.g., extruders) for pumping molten material into one or more mold cavities. The multiple molding systems may pump the same material or different materials into the one or more mold cavities. The multiple molding systems may be individually and/or collectively controlled. A method of molding a part may include pumping material into one or more mold cavities via multiple molding systems, ceasing pumping material into the one or more mold cavities when one or more pressures associated with the multiple molding systems are achieved, and releasing a molded part from the one or more mold cavities after the one or more pressures are achieved.

An injection molding apparatus including an actuator interconnected to a rod or valve pin having a smooth continuous cylindrical outer surface and one or more discontinuous or relieved or relieved portions formed as discontinuities in the cylindrical outer surface and adapted to be disposed within a fluid flow channel, the one or more discontinuous or relieved portions being configured and arranged along the axial length of the pin or rod such that the flow of injection fluid over or past the one or more discontinuous or relieved portions is modified to flow at substantially different rates or velocities or in substantially different flow patterns relative to rate or velocity or pattern of flow of injection fluid over or past the smooth continuous cylindrical outer surface.

A nozzle terminal of an injector comprises a tip and a ring nut having respective distal ends one of which is configured so as to be coupled with a gate of a moulding cavity, it cooperates with the shutter terminal of the valve pin of the injector, and it has an overall thickness in cross-section which is equal to or less than that of the cross-section of the shutter terminal of the valve pin.

A nozzle terminal of an injector comprises a tip and a ring nut having respective distal ends one of which is configured so as to be coupled with a gate of a moulding cavity, it cooperates with the shutter terminal of the valve pin of the injector, and it has an overall thickness in cross-section which is equal to or less than that of the cross-section of the shutter terminal of the valve pin.

An injection-molding station for the manufacture of multilayer preforms comprises an injection-molding machine (2), at least one multi-component nozzle (3), at least two melt accumulators (4, 5) constructed as cylinder accumulators and connected thereto, at least two plasticizer units (6, 7) for charging them and a control unit (8). The multi-component nozzle has slides (17, 19), which are associated with the melt channels (9, 10) and which are separately activated by the control unit independently of one another in such a way that the respective melt channels have an infinitely variable passage cross section. Proportional actuators (26, 27) that can be activated by the control unit are associated with the pistons (22, 23) of the cylinder accumulators. The control unit comprises a memory unit for coordinated movement or position profiles of the at least two closing slides and the at least two melt-accumulator pistons.

An injection-molding station for the manufacture of multilayer preforms comprises an injection-molding machine (2), at least one multi-component nozzle (3), at least two melt accumulators (4, 5) constructed as cylinder accumulators and connected thereto, at least two plasticizer units (6, 7) for charging them and a control unit (8). The multi-component nozzle has slides (17, 19), which are associated with the melt channels (9, 10) and which are separately activated by the control unit independently of one another in such a way that the respective melt channels have an infinitely variable passage cross section. Proportional actuators (26, 27) that can be activated by the control unit are associated with the pistons (22, 23) of the cylinder accumulators. The control unit comprises a memory unit for coordinated movement or position profiles of the at least two closing slides and the at least two melt-accumulator pistons.

A low pressure injection mold includes a failsafe pressure mechanism that prevents the low pressure injection mold from being subjected to excessive injection pressures or excessive clamping tonnage that could damage the low pressure injection mold.

A method for controlling the filling of at least one cavity in a device for producing an object, in particular in an injection molding machine, wherein a melt is inserted into the cavity through an opening, and the width thereof is altered, wherein the width of the opening is also to be changed and adjusted, that is, fixed, in a position between a closed position and a maximal open position.

An injection molding machine includes a first reservoir cylinder and a second reservoir cylinder to which a molten resin is supplied, a first injection member provided inside the first reservoir cylinder and configured to push out the molten resin in the first reservoir cylinder, a second injection member provided inside the second reservoir cylinder and configured to push out the molten resin in the second reservoir cylinder, and an injection cylinder to which the molten resin in the first reservoir cylinder and the molten resin in the second reservoir cylinder are supplied. Upon supply of the molten resin from the first reservoir cylinder to the injection cylinder, the injection molding machine supplies the molten resin to the second reservoir cylinder, and upon supply of the molten resin from the second reservoir cylinder to the injection cylinder, the injection molding machine supplies the molten resin to the first reservoir cylinder.