An injection unit for a moulding machine includes an injection cylinder, and an injection piston is provided in the injection cylinder. During an injection process, the injection piston is configured to push out a plasticized mass—in particular plasticized plastic—from the injection cylinder and to feed it to a moulding tool via an injection nozzle. At least two plasticizing units and two supply channels are provided, and the at least two plasticizing units can be fluidically connected with the injection nozzle by the supply channels. The at least two plasticizing units are configured to supply the injection cylinder with the plasticized mass via the supply channels and the injection nozzle prior to the injection process.

An extruder has a barrel extending from a feed inlet end to an extruder outlet end. The barrel has an inner surface, an outer surface, and a wall thickness between the inner and outer surfaces. The extruder also has at least one heating member positioned provided on the barrel; a screw drive motor drivingly connected to a rotatably mounted screw positioned within the barrel, whereby the screw is rotatable at various revolutions per minute (RPM); and a controller is operably connected to the screw drive motor to adjust the RPM of the screw based upon a temperature of material passing through and/or being extruded from the barrel. Methods for operating an extruder filling a mold are also provided.

An extruder has a barrel extending from a feed inlet end to an extruder outlet end. The barrel has an inner surface, an outer surface, and a wall thickness between the inner and outer surfaces. The extruder also has at least one heating member positioned provided on the barrel; a screw drive motor drivingly connected to a rotatably mounted screw positioned within the barrel, whereby the screw is rotatable at various revolutions per minute (RPM); and a controller is operably connected to the screw drive motor to adjust the RPM of the screw based upon a temperature of material passing through and/or being extruded from the barrel. Methods for operating an extruder filling a mold are also provided.

A plasticizing device that plasticizes at least a part of a material to generate a plasticized material, the plasticizing device includes: a drive motor; a screw configured to rotate around a rotation axis by a drive force of the drive motor and having a groove forming surface in which a groove is formed; a speed reducer disposed between the drive motor and the screw and configured to transmit the drive force of the drive motor to the screw; a barrel having a facing surface facing the groove forming surface and having a through hole into which the plasticized material flows; a first heater configured to heat the material supplied between the screw and the barrel; a first cooling unit configured to cool the drive motor; and a heat insulating unit disposed between the first cooling unit and the speed reducer. At least a part of the heat insulating unit overlaps the first cooling unit when viewed along the rotation axis of the screw.

A plasticizing device that plasticizes at least a part of a material to generate a plasticized material, the plasticizing device includes: a drive motor; a screw configured to rotate around a rotation axis by a drive force of the drive motor and having a groove forming surface in which a groove is formed; a speed reducer disposed between the drive motor and the screw and configured to transmit the drive force of the drive motor to the screw; a barrel having a facing surface facing the groove forming surface and having a through hole into which the plasticized material flows; a first heater configured to heat the material supplied between the screw and the barrel; a first cooling unit configured to cool the drive motor; and a heat insulating unit disposed between the first cooling unit and the speed reducer. At least a part of the heat insulating unit overlaps the first cooling unit when viewed along the rotation axis of the screw.

An injection molding machine that contributes to improving the quality of a workpiece is provided. An injection molding machine configured to causes torpedo pistons to be slid in one way to thereby plasticize a resin material supplied to a first space of a cylinder, and causes a molten resin to flow into a second space of the cylinder and causes the torpedo pistons to be slid in the other way to thereby inject the molten resin. The injection molding machine includes pressurizing pistons inserted into the torpedo pistons so that the pressurizing pistons can be slid in such a way that an amount of protrusion of the cylinder into the second space of the cylinder with respect to the torpedo pistons is changed, and energizing means for energizing the pressurizing pistons toward the second space of the cylinder.

An injection molding apparatus that employs a stationary plasticating screw relative to feed port, non-reciprocal helical plasticating screw housed within an inner barrel that is coupled to a plunger head assembly, drive housing, motor and injection cylinders that is housed within an outer barrel/pressure vessel that conveys, melts, homogenizes and pumps polymeric plastic material precisely and efficiently along One axis. The helical plasticating screw is fixed in relative position within the inner barrel so that the material feed opening of the inner barrel and helical plasticating screw are aligned to accept pellets, powder or liquid of polymetric substance. The inner barrel is fixed to a plunger head assembly on the distal end that is housed within a pressure vessel with close proximity between the outside diameter of the plunger head and the inside diameter of said pressure vessel that upon screw rotation transfers polymetric material through the center passageway of said plunger head opening a normally closed one-way shut-off mechanism into said pressure vessel precisely for future displacement of polymeric mass into a mold or other. The apparatus and process of feeding, melting and injecting Polymeric material all occurs on one axis.

A manufacturing apparatus includes an injection cylinder to which molten resin is supplied and which is configured to inject the molten resin, and an injection plunger disposed such that the injection plunger fits in the injection cylinder and moves in a first direction and a second direction opposite to the first direction. The injection cylinder includes a base body configured to contain the molten resin, and a sleeve configured to be detachably attached to the base body. The injection plunger is configured to be inserted into an inner portion of the base body through an opening portion formed in the sleeve and slide on the sleeve.

An injection arrangement for a moulding machine includes a moulding compound reservoir and an injection unit. The moulding compound reservoir is configured to provide a plasticized mass and to push out the plasticized mass through a discharge opening, and a connecting device is coupled to the discharge opening of the moulding compound reservoir and a feed opening of the injection unit, and is configured to direct the plasticized mass from the moulding compound reservoir to the injection unit. The connecting device includes an articulated element, and a relative movement between the moulding compound reservoir and the injection unit can be performed with the articulated element.

An injection arrangement for a moulding machine includes a moulding compound reservoir and an injection unit. The moulding compound reservoir is configured to provide a plasticized mass and to push out the plasticized mass through a discharge opening, and a connecting device is coupled to the discharge opening of the moulding compound reservoir and a feed opening of the injection unit, and is configured to direct the plasticized mass from the moulding compound reservoir to the injection unit. The connecting device includes an articulated element, and a relative movement between the moulding compound reservoir and the injection unit can be performed with the articulated element.