A system for mixing a fine bulk material including means defining a looped passageway including a vertically disposed, laterally enlarged section having a frusto-conically configured, lower outlet portion; means for injecting a fluid under pressure into an upper segment of such frusto-conically configured lower outlet portion to fluidize material therein; means for injecting a fluid under pressure into a lower segment of such frusto-conically configured lower portion to fluidize material therein; and means for injecting a fluid under pressure in said passageway downstream of said lower outlet portion sufficient to induce the flow of fluidized material through said passageway to an upper end of such enlarged section.

An injector head for delivering particulate material from a feeder source to a receiver is fitted with a plurality of splitter bars extending generally laterally from the sidewalls thereof into the space through which particulate material is fed as it flows into a receiver. Spray nozzles mounted to said sidewalls below said splitter bars spray coating material generally laterally relative to said sidewalls and generally laterally relative to the length of said splitter bars so as to coat particulate material as it passes over and to the sides and ends of said splitter bars.

According to one embodiment a solid component mixing apparatus is provided that includes a mixing device, a first dosing device for supplying sand and a second dosing device for supplying a solid additive that are communicated with the mixing device. The mixing device includes a vertical mixing chamber with a rectangular cross-section, the contour of the chamber being formed by four side walls, such that two side walls opposite one another are wider than the other two walls. The chamber includes a first inlet communicated with the first dosing device and a second inlet communicated with the second dosing device, the second inlet being at a lower height than the first inlet, and the second inlet being arranged in one of the wider side walls of the chamber. Associated mixing methods are also provided.

A method for the manufacture of foamed plaster utilizing a mixture of powdered casting plaster, powdered limestone and hemp fibre. The mixture is fed into a Venturi apparatus (40) under the influence of gravity. Compressed air may be supplied to the Venturi apparatus (40) through an inlet pipe (41) causing air and solid particles to be sucked into the Venturi apparatus (40). The elongated tube is provided with an inlet nozzle arranged to receive a mixture of water mixed with detergent agents. Further, the tube (50) is provided with an inlet nozzle (56) arranged to receive compressed air such that the elongated tube (50) delivers the mixture to a mixing and spray head (60) so as to feed the resulting mixture to a moulding means.

The present invention relates to an equipment and method for producing polymer pellets which comprise one or more polymer components and one or more further components, wherein in said process at least one of said one or more further components is incorporated into pellets by applying a liquid, which comprises said at least one component, onto said pellets.

Layering of initially mixed granular dissimilar material components deposited by surface flow is realized by varying the relative angle of the flowing layer periodically with respect to the bulk of the pile formed. Layer thickness and extent can be controlled by varying the timing and extent of the surface variations. Variation in surface flow rates may be realized by varying the feed rate from an inlet to a collection base at a fixed feed location, varying the feed location relative to the collection base, tilting the collection base that is supporting the material, and reducing the pile repose angle using vibration or fluid flow through the base.

Powder module (1, 15, 24) for an apparatus for additively manufacturing of three-dimensional objects, comprising a powder chamber (2) defining a powder room (3), which is fillable with building material (4) in powder form and a cover (5) defining the powder room (3) at its top, whereby the powder module (1, 15, 24) comprises at least one equalization unit (7), configured for spreading the building material (4) inside the powder room (3).

Layering of initially mixed granular dissimilar material components deposited by surface flow is realized by varying the relative angle of the flowing layer periodically with respect to the bulk of the pile formed. Layer thickness and extent can be controlled by varying the timing and extent of the surface variations. Variation in surface flow rates may be realized by varying the feed rate from an inlet to a collection base at a fixed feed location, varying the feed location relative to the collection base, tilting the collection base that is supporting the material, and reducing the pile repose angle using vibration or fluid flow through the base.

A sink is configured to attach to a bottom surface of a flowline that is configured to flow a mixture of at least two immiscible fluids. One of the immiscible fluids is water. The water is more dense than the other of the at least two immiscible fluids. An outlet formed at a bottom portion of the sink. A valve system is connected to the opening. The valve system is configured to open the outlet in response to the water occupying at least a portion of the sink.

The present invention relates to an equipment and method for producing polymer pellets which comprise one or more polymer components and one or more further components, wherein in said process at least one of said one or more further components is incorporated into pellets by applying a liquid, which comprises said at least one component, onto said pellets.