A mixing device serves for producing a powder mixture of a first powder component and at least one second powder component for an additive manufacturing device. The mixing device includes a first container for receiving the first and/or the second powder component, where a discharge opening for discharging the first and/or the second powder component is provided at a lower boundary of the first container, and a second container for receiving the first and/or the second powder component. The second container is designed to be at least partially open towards an upper side. The first and second container each include at least one fluidization zone for introducing a gas into the first and second container. The mixing device further includes a powder conduit that connects to the discharge opening of the first container and is guided into the second container.

An injection mixer is provided, which includes an injection module, a valve seat module, and an adjusting module. The injection module may be disposed to penetrate one end of a bucket container. The valve seat module may be disposed at the end of the injection module, and the valve seat module may be disposed with at least one fluid supply channel and at least one outlet channel. The adjusting module may be disposed at the valve seat module to penetrate therethrough. The adjusting module may be movably connected to the injection module. When the adjusting module is driven to move the injection module towards or away from the valve seat module, an annular protrusion may approach or move away from the inner wall of the bucket container, and a size of the predetermined gap may be reduced or increased.

A blower unit for pneumatic mixers, comprising: a hollow element internally defining a duct, extending between an input section and an output section, for the passage of an air flow between said sections, wherein said input section can be connected to a source of pressurised air and said output section can be connected to a manifold of a pneumatic mixer; a shutter suitable to shut off said airflow through said output section in a controlled manner; an actuator connected to the shutter and configured to regulate the position of the shutter; the hollow element has a first end portion, at said output section, that can be reversibly coupled to a corresponding end portion of the manifold and wherein the blower unit further comprises first reversible connecting means to establish a reciprocal connection between the end portions.

An apparatus and methods of mixing materials in a silo that includes a mixing chamber (2) with an outlet (23) the bottom and an inlet hose (4) connected to an inlet opening at the top; a sieve (16) at the top of the mixing chamber above the inlet opening and below the outlet opening to prevent contact between a particulate mixing material and the top of the mixing chamber and to allow dust through; a pump system (18) to create a negative pressure region at the top of the mixing chamber; and an air manifold assembly (8), which includes an air pressure manifold (10) having an air nozzle (12) to introduce an air stream into the mixing chamber and an air manifold cover (14) to prevent contact between the particulate mixing material and the air pressure manifold, and to allow a particulate mixed product material to pass to the mixing chamber outlet.

A blower unit for pneumatic mixers, comprising: a hollow element internally defining a duct, extending between an input section and an output section, for the passage of an air flow between said sections, wherein said input section can be connected to a source of pressurised air and said output section can be connected to a manifold of a pneumatic mixer; a shutter suitable to shut off said airflow through said output section in a controlled manner; an actuator connected to the shutter and configured to regulate the position of the shutter; the hollow element has a first end portion, at said output section, that can be reversibly coupled to a corresponding end portion of the manifold and wherein the blower unit further comprises first reversible connecting means to establish a reciprocal connection between the end portions.

The present invention relates to a fluidized bed apparatus and a method for particle-coating or granulating, the fluidized bed apparatus includes a swirl generator which is mounted on a sprayer body in the fluidized bed apparatus and extends throughout an air distribution plate and is connected to a source of compressed air. The swirl generator comprises a tubular sleeve extending circumferentially around the sprayer body, and an air chamber is defined between the sleeve and the sprayer body, wherein the sleeve comprises a plurality of guiding slots. The air from the source of compressed air via the air chamber is directed by said guiding slots to rotate outwardly, so as to provide a swirling air stream circumferentially outwardly relative to the sprayer. The present invention can facilitate the development of the spray pattern and the particle flow pattern and allows the particles to spin respectively due to slight friction with the inner wall of the partition, thereby opportunities for the particles to obtain a more uniform spray when subsequently passing through the spray zone above the nozzle are increased, so that performance of the fluidized bed apparatus is improved.

The present invention relates to a fluidized bed apparatus and a method for particle-coating or granulating, the fluidized bed apparatus includes a swirl generator which is mounted on a sprayer body in the fluidized bed apparatus and extends throughout an air distribution plate and is connected to a source of compressed air. The swirl generator comprises a tubular sleeve extending circumferentially around the sprayer body, and an air chamber is defined between the sleeve and the sprayer body, wherein the sleeve comprises a plurality of guiding slots. The air from the source of compressed air via the air chamber is directed by said guiding slots to rotate outwardly, so as to provide a swirling air stream circumferentially outwardly relative to the sprayer. The present invention can facilitate the development of the spray pattern and the particle flow pattern and allows the particles to spin respectively due to slight friction with the inner wall of the partition, thereby opportunities for the particles to obtain a more uniform spray when subsequently passing through the spray zone above the nozzle are increased, so that performance of the fluidized bed apparatus is improved.

An injection mixer is provided, which includes an injection module, a valve seat module, and an adjusting module. The injection module may be disposed to penetrate one end of a bucket container. The valve seat module may be disposed at the end of the injection module, and the valve seat module may be disposed with at least one fluid supply channel and at least one outlet channel. The adjusting module may be disposed at the valve seat module to penetrate therethrough. The adjusting module may be movably connected to the injection module. When the adjusting module is driven to move the injection module towards or away from the valve seat module, an annular protrusion may approach or move away from the inner wall of the bucket container, and a size of the predetermined gap may be reduced or increased.

An apparatus and methods of mixing materials in a silo that includes a mixing chamber (2) with an outlet (23) the bottom and an inlet hose (4) connected to an inlet opening at the top; a sieve (16) at the top of the mixing chamber above the inlet opening and below the outlet opening to prevent contact between a particulate mixing material and the top of the mixing chamber and to allow dust through; a pump system (18) to create a negative pressure region at the top of the mixing chamber; and an air manifold assembly (8), which includes an air pressure manifold (10) having an air nozzle (12) to introduce an air stream into the mixing chamber and an air manifold cover (14) to prevent contact between the particulate mixing material and the air pressure manifold, and to allow a particulate mixed product material to pass to the mixing chamber outlet.

A pothole filling method and apparatus with a separate liquid asphalt tank, aggregate hopper, and activator container, and having and using one or more of the following features: 1. Compressed air to deliver the liquid asphalt component from the liquid asphalt tank to the mixing head; 2. A swivel between extender delivery conduits, with an internal sleeve for guiding aggregate and protecting the swivel bearings; 3. A water cleaning system being switchable between a clean out line connected directly to a mixing/delivery unit or to the liquid asphalt delivery line, which cleans the delivery line as well as the mixing/delivery unit; 4. A mixer/delivery unit clean out is provided, wherein the unit is operated at increased speed a short time after the unit stops operating; 5. Compressed air bubbler or an air driven stirrer for mixing the liquid component. 6. A generally vertically oriented funnel shaped activator holder with a generally vertically oriented motorized auger extending to a delivery tube, to deliver activator to a mixing/delivery unit.