A depowdering apparatus for depowdering a cake comprising a build part includes a depowdering chamber, a blast nozzle, and a build elevator. The depowdering chamber includes a bottom surface and a build inlet extending through the bottom surface, where the build inlet includes an inlet axis that is substantially vertically oriented. The blast nozzle is positioned within the depowdering chamber and oriented to direct a fluid stream toward the inlet axis. The blast nozzle is laterally spaced from the inlet axis and operable to revolve about the inlet axis on a travel path encircling the inlet axis. The build elevator is arranged below the build inlet in a vertical direction and is operable to raise the cake comprising the build part through the build inlet and into the depowdering chamber along the inlet axis as the blast nozzle is revolved about the inlet axis on the travel path.

A waterjet system is provided, including a pump configured to pump fluid, an electric motor configured to drive the pump; a hopper configured to store abrasive, a mixing chamber configured to mix abrasive from the hopper and the fluid from the pump to produce a slurry, where the fluid entering the mixing chamber is at a pressure between 2000 psi and 8000 psi, a cutting bed configured to receive a workpiece to be cut, and a cutting head, including an outlet nozzle, in downstream fluid communication from the mixing chamber, the cutting head configured to expel the slurry through the outlet nozzle as a high-velocity jet into the cutting bed.

A waterjet system is provided, including a pump configured to pump fluid, an electric motor configured to drive the pump; a hopper configured to store abrasive, a mixing chamber configured to mix abrasive from the hopper and the fluid from the pump to produce a slurry, where the fluid entering the mixing chamber is at a pressure between 2000 psi and 8000 psi, a cutting bed configured to receive a workpiece to be cut, and a cutting head, including an outlet nozzle, in downstream fluid communication from the mixing chamber, the cutting head configured to expel the slurry through the outlet nozzle as a high-velocity jet into the cutting bed.

A pipeline exterior blasting system includes a containment enclosure, a blasting subsystem, and a waste material removal subsystem. The containment enclosure is configured to enclose a section of a pipeline. The blasting subsystem is configured to propel blasting material at an exterior surface of the section of pipeline within the containment enclosure. The waste material removal subsystem configured to remove blasting waste material from within the containment enclosure. A method of treating an exterior surface of a section of pipeline includes enclosing the section of pipeline within a containment enclosure. Blasting material is propelled at the exterior surface of the section of pipeline within the containment enclosure, after which blasting waste material is removed from within the containment enclosure.

A pipeline exterior blasting system includes a containment enclosure, a blasting subsystem, and a waste material removal subsystem. The containment enclosure is configured to enclose a section of a pipeline. The blasting subsystem is configured to propel blasting material at an exterior surface of the section of pipeline within the containment enclosure. The waste material removal subsystem configured to remove blasting waste material from within the containment enclosure. A method of treating an exterior surface of a section of pipeline includes enclosing the section of pipeline within a containment enclosure. Blasting material is propelled at the exterior surface of the section of pipeline within the containment enclosure, after which blasting waste material is removed from within the containment enclosure.

A water-abrasive suspension cutting facility includes a high-pressure source (3) for providing (301) water at a high pressure, a high-pressure conduit (5) which is connected to the high-pressure source (3), a pressure tank for providing (303) a water-abrasive agent suspension (13) which is at a high pressure, a lock chamber (21) which is designed to temporarily be at a high pressure and temporarily at a low pressure, and a filling valve (23) for filling (311) the lock chamber when this is at a low pressure. A pump (31) at the suction side is fluid-connected to the lock chamber in a manner capable of being shut off, in a manner such that given high pressure in the lock chamber (21) the pump is shut off from this and given low pressure in the lock chamber (21) the pump is in the position of sucking an abrasive agent suspension through the filling valve (23) into the lock chamber (21).

An engraving machine for engraving building material articles comprises a working plane on which, in use, at least one building material article rests, and defining a working area having a predetermined width, an engraving device facing the working plane and equipped with at least one reservoir for containing an abrasive particulate material, and an array of nozzles for delivering the abrasive particulate material configured for making a predetermined engraving path on the article, and moving means configured to determine a relative sliding between the working plane and the engraving device along a movement direction transverse to the predetermined width. The nozzles of the array are arranged in succession along a direction transverse to the movement direction to fully cover said predetermined width. A control unit is and configured to drive associated nozzles independently of each other.

An engraving machine for engraving building material articles comprises a working plane on which, in use, at least one building material article rests, and defining a working area having a predetermined width, an engraving device facing the working plane and equipped with at least one reservoir for containing an abrasive particulate material, and an array of nozzles for delivering the abrasive particulate material configured for making a predetermined engraving path on the article, and moving means configured to determine a relative sliding between the working plane and the engraving device along a movement direction transverse to the predetermined width. The nozzles of the array are arranged in succession along a direction transverse to the movement direction to fully cover said predetermined width. A control unit is and configured to drive associated nozzles independently of each other.

The present disclosure relates to abrasive material delivery systems for liquid jet cutting systems. The abrasive material delivery systems can include a valve configured to adjust an inflow of abrasive material into the abrasive material delivery system from a source of abrasive material. The systems can include a chamber downstream of the valve and configured to receive the inflow of abrasive material from the valve. The systems can include a metering component configured to control an outflow of abrasive from the chamber to a cutting head of the liquid jet cutting system. In some embodiments, the systems include a sensor configured to monitor movement of a top surface of a portion of abrasive material within the chamber as the top surface moves through the chamber; and a processing device operably connected to the sensor and configured to determine an abrasive flow rate through the metering component based on a speed of the top surface as monitored by the sensor.

The present disclosure relates to abrasive material delivery systems for liquid jet cutting systems. The abrasive material delivery systems can include a valve configured to adjust an inflow of abrasive material into the abrasive material delivery system from a source of abrasive material. The systems can include a chamber downstream of the valve and configured to receive the inflow of abrasive material from the valve. The systems can include a metering component configured to control an outflow of abrasive from the chamber to a cutting head of the liquid jet cutting system. In some embodiments, the systems include a sensor configured to monitor movement of a top surface of a portion of abrasive material within the chamber as the top surface moves through the chamber; and a processing device operably connected to the sensor and configured to determine an abrasive flow rate through the metering component based on a speed of the top surface as monitored by the sensor.