The invention relates to a mixing device comprising at least one supply opening for at least one liquid and comprising at least one additional supply opening for at least one liquid curing or crosslinking agent. The liquid and/or the liquid curing or crosslinking agent is/are mixed with a gas. The mixing device also comprises a discharge opening for discharging a mixture, which can be produced in the mixing device, of the at least one liquid and the at least one liquid curing or crosslinking agent. A pressure holding device is provided for holding a specifiable pressure which is higher than the pressure at which the gas in the mixing device is foamed.

A microfluidic printing nozzle for 3D printing may include a mixing chamber, a first inlet for connecting with a first ink source, the first inlet located at a first end of the mixing chamber, and a second inlet for connecting with a second ink source, the second inlet located at the first end of the mixing chamber. An outlet may be located at a second end of the mixing chamber, and a generally cylindrical impeller may be rotatably disposed in the mixing chamber between the first end and the second end. The cylindrical impeller may include an outer surface, and the outer surface of the impeller includes a groove, a protrusion, or both, to facilitate mixing of fluidic inks flowing from the first end to the second end of the mixing chamber.

A mixing device for mixing a liquid plastics component with a gas, having at least one liquid feed, at least one gas feed and a discharge opening for the mixture generated in the mixing device, each of which is connected to a mixing chamber in which a rotatable agitator device is arranged, wherein a shaft for driving the agitator device projects out of the mixing chamber, and the mixing chamber is sealed off, in the region of the shaft, by at least one seal, wherein, on that side of the at least one seal which is averted from the mixing chamber, there is arranged a reservoir which is connected to the at least one liquid feed and which is connected by way of a line to the mixing chamber.

A dynamic mixer dispense valve and metering apparatus suitable for use in mixing and applying high viscosity, disparate viscosity, high ratio and/or relatively immiscible two part compounds that exhibit short cure times includes a housing supporting a pair of valve assemblies each coupled to respective sources of base and accelerator components. A pair of pneumatic valve actuator s control the operation of the valve assemblies to control the flow of components into a mixing chamber. Within the mixing chamber a mixer impeller is rotatably supported and coupled to a source of rotational power. An additional pneumatic valve actuator combination operates a further flow control to prevent undesired material loss following a shot cycle.

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 microfluidic printing nozzle for 3D printing may include a mixing chamber, a first inlet for connecting with a first ink source, the first inlet located at a first end of the mixing chamber, and a second inlet for connecting with a second ink source, the second inlet located at the first end of the mixing chamber. An outlet may be located at a second end of the mixing chamber, and a generally cylindrical impeller may be rotatably disposed in the mixing chamber between the first end and the second end. The cylindrical impeller may include an outer surface, and the outer surface of the impeller includes a groove, a protrusion, or both, to facilitate mixing of fluidic inks flowing from the first end to the second end of the mixing chamber.

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 system for extrusion of material, for example chopped waste plastic, comprises a treatment device (101) for extruding the material and a feeder device (102) comprising a screw conveyor (103) for supplying the material to the treatment device. A screw element (104) of the screw conveyor has: a) a conical profile so that a diameter of the screw element decreases in a moving direction of the material and/or b) a thread-pitch decreasing in the moving direction of the material and/or c) an axial thickness of a screw thread crest increasing in the moving direction. The conical profile of the screw element and/or the thread-pitch decreasing in the moving direction and/or the axial thickness of the screw thread crest increasing in the moving direction improve the ability of the screw conveyor to compact the material and thereby to supply a sufficiently uniform material flow to the treatment device.

The invention relates to a rotor shaft for a dynamic mixer, in particular a dental dynamic mixer, for mixing low to high viscous components, comprising a mixing area and a connection geometry adjoining the mixing area, the mixing area comprising a central shaft having a distal end and a proximal end abutting the connection geometry, and having at least one worm thread, in particular the rotor shaft has at least two mixing sections, a first mixing section comprising at least two mixing blades radially oriented on the surface of the central shaft and a second mixing section comprising at least one worm thread having spirally running thread flanks, the spirally running thread flanks peripherally entwining the surface of the central shaft. Furthermore, the invention relates to a dynamic mixer, in particular a dental dynamic mixer, comprising the rotor shaft, as well as its use for mixing low to high viscous components.