A method of removing a coating from a substrate comprises positioning a nozzle of an apparatus such that a longitudinal axis of a distal end of the nozzle is inclined at an angle ? with a coated surface of the substrate. The nozzle including an inner conduit having an orifice and an outer conduit coaxially arranged about the inner conduit and defining an annular opening between the inner and outer conduits. Directing a liquid stream through the orifice toward the coated surface and directing a gas flow through the annular opening such that the gas flow surrounds the liquid stream, and impinging the liquid stream on the coated surface.

A method of removing a coating from a substrate comprises positioning a nozzle of an apparatus such that a longitudinal axis of a distal end of the nozzle is inclined at an angle ? with a coated surface of the substrate. The nozzle including an inner conduit having an orifice and an outer conduit coaxially arranged about the inner conduit and defining an annular opening between the inner and outer conduits. Directing a liquid stream through the orifice toward the coated surface and directing a gas flow through the annular opening such that the gas flow surrounds the liquid stream, and impinging the liquid stream on the coated surface.

An abrasive grain jet grinding device having a belt partially wrapped around an impeller with blades between a shaft-side disc and an open disc and an open peripheral surface between the blades, a nozzle tangential to the disk at the point of separation between the belt and the peripheral surface, wherein the blades held between the shaft-side disc and the open disc are formed from thin plates to finely partition the circumference of the discs, are inclined forward in the direction of rotation of the discs, are provided densely so that multiple adjacent blades overlap each other, and are set with narrow gaps between the blades to form a large number of storage chambers for the abrasive grains.

An integrated liquidjet system capable of stripping, prepping and coating a part includes a cell defining an enclosure, a jig for holding the part inside the cell, an ultrasonic nozzle having an ultrasonic transducer for generating a pulsed liquidjet, a coating particle source for supplying coating particles to the nozzle, a pressurized liquid source for supplying the nozzle with a pressurized liquid to enable the nozzle to generate the pulsed liquidjet to sequentially strip, prep and coat the part, a high-voltage electrode and a ground electrode inside the nozzle for charging the coating particles, and a human-machine interface external to the cell for receiving user commands and for controlling the pulsed liquidjet exiting from the nozzle in response to the user commands.

An integrated liquidjet system capable of stripping, prepping and coating a part includes a cell defining an enclosure, a jig for holding the part inside the cell, an ultrasonic nozzle having an ultrasonic transducer for generating a pulsed liquidjet, a coating particle source for supplying coating particles to the nozzle, a pressurized liquid source for supplying the nozzle with a pressurized liquid to enable the nozzle to generate the pulsed liquidjet to sequentially strip, prep and coat the part, a high-voltage electrode and a ground electrode inside the nozzle for charging the coating particles, and a human-machine interface external to the cell for receiving user commands and for controlling the pulsed liquidjet exiting from the nozzle in response to the user commands.

Provided are a method and a device for descaling that make it possible to effectively remove oxide scale from the surface of a metal wire. The descaling includes spraying the surface of a metal wire (W) with a mixture (9) of water and hard particles from a plurality of nozzles (8). The plurality of nozzles (8) include a plurality of self-cleaning nozzles that spray at a spray angle () of 90 or smaller with respect to the metal wire (W). The spray angle () is the angle formed by the central axis (X) of the spraying and a vector (Vt) indicating a conveyance direction that originates at the intersection (P) of the central axis (X) and the metal wire surface.

Provided are a method and a device for descaling that make it possible to effectively remove oxide scale from the surface of a metal wire. The descaling includes spraying the surface of a metal wire (W) with a mixture (9) of water and hard particles from a plurality of nozzles (8). The plurality of nozzles (8) include a plurality of self-cleaning nozzles that spray at a spray angle () of 90 or smaller with respect to the metal wire (W). The spray angle () is the angle formed by the central axis (X) of the spraying and a vector (Vt) indicating a conveyance direction that originates at the intersection (P) of the central axis (X) and the metal wire surface.

The use of abrasive entrainment waterjet technology to cut improvised hazardous devices, such as improvised explosive devices (IEDs), located above or below ground. Abrasive is conducted to an entrainment abrasive waterjet cutting head under the control of an abrasive feed and metering system that monitors the flow rate of abrasive.

The use of abrasive entrainment waterjet technology to cut improvised hazardous devices, such as improvised explosive devices (IEDs), located above or below ground. Abrasive is conducted to an entrainment abrasive waterjet cutting head under the control of an abrasive feed and metering system that monitors the flow rate of abrasive.

An apparatus for removing a coating from a substrate comprises a nozzle with an inner conduit having an orifice and an outer conduit coaxially arranged about the inner conduit and defining an annular opening between the inner and outer conduits. The nozzle is configured to direct a liquid stream through the orifice toward the coated surface and direct a gas flow through the annular opening such that the gas flow surrounds the liquid stream as the liquid stream moves towards the coated surface.