An extruder-mixer has a stator and a rotor arranged coaxially to the stator. The rotor is mounted rotatably relative to the stator. The stator, at least in portions, is arranged inside a volume spanned by the rotor. Such an extruder-mixer may be with an extruder. An extruder screw may be mounted in a screw housing of the extruder and coupled to a screw drive of the extruder.

A system and method to dispense, mix, and inject liquids and force them into a vented investment pattern mold cavity comprises a source of raw materials in fluid communication with an injection unit for metering and delivering the raw materials. A mixing and injection head receives and mixes the metered raw materials. A movable molding cart upon which an investment pattern mold is mounted is disposed adjacent the injection unit and proximate the mixing and injection head. The movable molding cart includes a fill cup that may be engaged by the mixing and injection head. A displaceable gating tray provides fluid communication with the fill cup and a sprue aligned with an investment port on a lower portion of the investment pattern mold. The system also includes a digital computer control by which the injection process may be controlled.

Provided is a shaping material supply device for use in a three-dimensional shaping apparatus, which includes a first flow path through which a shaping material flows, a nozzle that communicates with the first flow path and discharges the shaping material, and a flow rate regulation mechanism that includes a butterfly valve provided in the first flow path.

A device for mixing at least two fluid to pasty substances has a housing (2) with at least two openings (5, 6) for feeding the substances and with a discharge opening (8), a mixing element (3) which can rotate in the housing (2), which mixing element (3) can be displaced in the direction (17) of its axis (7) in relation to the housing (2) in order to adjust the size of a gap (18) between a conically tapering part (14) of the mixing element (3) and a likewise tapering region (15) of the housing (2) in order to adjust the shear rate in the region of the gap (18). The mixing element (3) has a region (9) in which annular ribs (11) are provided which project from the mixing element (3) and which engage between adjacent annular ribs (12) which project from the inner surface (10) of the housing (2).

A plastic melt machine includes a feed screw rotatably mounted in a barrel and driven in rotation about a longitudinal screw axis of the feed screw by a screw drive to plasticize material, and an apparatus for driving a device independently of the feed screw. The device can be any rotatable device associated with the feed screw wherein the device is rotatable about a drive axis and is in fluid communication with the barrel to receive the plasticized material. The drive axis is one of parallel to and offset from the screw axis and extending at an angle relative to the screw axis. A drive shaft couples the device to the device drive for rotating the device independently of the rotation of the feed screw by the screw drive.

A process for manufacturing a self-sealing elastomer composition, said process comprising the following steps: a masterbatch, comprising at least one diene elastomer and more than 30 phr of a hydrocarbon resin, is firstly manufactured by compounding these various components in a mixer at a temperature or up to a temperature called the hot compounding temperature which is above the softening point of the hydrocarbon resin; and then at least one crosslinking system is incorporated into the masterbatch thus prepared, by compounding everything in the same mixer or in a different mixer, at a temperature or up to a temperature which is kept below 100 C., in order to obtain said self-sealing composition.

A mixing head 3 which mixes a first preparative liquid formulation containing a norbornene-based monomer with a second preparative liquid formulation containing a metathesis polymerization catalyst includes a casing 4, a cap 7, and a mixing rotor 6. A plurality of protrusions 622 includes first protrusions 622a having a width in the axial direction of the mixing rotor 6 larger than that in the circumferential direction, and second protrusions 622b having a width in the axial direction of the mixing rotor 6 smaller than that in the circumferential direction. First and second protrusion rows 623a and 623b are alternately arranged, the first protrusion rows 623a being formed of the first protrusions 622a aligned at a predetermined interval, the second protrusion rows 623b being formed of the second protrusions 622b aligned at a predetermined interval.

An extruder includes a mixing device having a mixing chamber formed by a housing, a stator and a rotor. The stator and the rotor are arranged at least partially within the mixing chamber. The stator is connected to the housing and/or is formed by the housing. The rotor is rotatable about an axis of rotation (D). At least one free space, into which the stator projects at least partially in the direction of the axis of rotation (D), is formed by the rotor. The stator and/or the rotor have/has at least one temperature control channel, through which a temperature control fluid can be made to flow in order to control the temperature of the stator and/or of the rotor. The extruder further includes a screw housing, a screw drive, and an extruder screw, which is mounted to the screw housing and is coupled to the screw drive.

An extruder-mixer has a stator and a rotor which is arranged coaxially with respect to the stator. The rotor is rotatably supported with respect to the stator. The stator is at least partially arranged inside a volume defined by the rotor. The rotor has a rotor cage having a large number of apertures. The apertures are configured to be elongate in a longitudinal direction and the longitudinal direction thereof extends in each case in a skewed manner with respect to a rotation axis of the rotor.