An apparatus includes a moving device movable along the surface of an object, and a rotary nozzle device. A rotary nozzle means comprise a plurality of jet nozzles. Two sets of the rotary nozzle means are arranged in parallel in a direction orthogonal to the moving direction of the moving device, are configured such that a left rotary nozzle means and a right rotary nozzle means perform a rotary motion in association with each other by a rotary transmission means. The jet nozzle of the left rotary nozzle means and the jet nozzle of the right rotary nozzle means are arranged so as to be out of phase with each other.

A method and apparatus produce an enhanced blast stream which may be directed at a workpiece. The enhanced blast stream has higher energy allowing the blast stream to remove difficult to remove coatings from substrates. A heated flow is combined with an entrained particle flow and expelled through a nozzle. The heated flow results in more energy being imparted to the coating.

A method and apparatus produce an enhanced blast stream which may be directed at a workpiece. The enhanced blast stream has higher energy allowing the blast stream to remove difficult to remove coatings from substrates. A heated flow is combined with an entrained particle flow and expelled through a nozzle. The heated flow results in more energy being imparted to the coating.

A device for cleaning adhesive surfaces of vehicle components using solid carbon dioxide is provided. The device may be used for automated cleaning in an assembly line with a plurality of work stations. The device includes a chamber-type cleaning area for vehicle components, a blasting device with a jet nozzle for emitting solid carbon dioxide onto the vehicle components, a transport device for transporting the vehicle components through the cleaning chamber, and a charge discharge device for discharging an electrostatic charge from the vehicle components in order to structurally and/or functionally improve the device.

a blast nozzle is provided that has a conduit through it for accelerating air applied to the blast nozzle at pressure greater than ambient pressure. The air contains abrasive particles for abrading or “blasting” a workpiece. The conduit includes an inlet portion that converges from an inlet opening for receiving the air, to a throat for accelerating the air to a sonic speed. The conduit also includes an outlet portion that extends from the throat to a nozzle outlet for accelerating the air from the throat to a super-sonic speed at the nozzle outlet. A ratio of area of the nozzle outlet to area of the throat is selected for expansion of the air through the conduit so that air is emitted from the nozzle outlet in a jet at an ambient pressure. The jet imparts drag on the abrasive particles between the nozzle outlet and the workpiece which has been found to improve abrading of the workpiece by the abrasive particles.

a blast nozzle is provided that has a conduit through it for accelerating air applied to the blast nozzle at pressure greater than ambient pressure. The air contains abrasive particles for abrading or “blasting” a workpiece. The conduit includes an inlet portion that converges from an inlet opening for receiving the air, to a throat for accelerating the air to a sonic speed. The conduit also includes an outlet portion that extends from the throat to a nozzle outlet for accelerating the air from the throat to a super-sonic speed at the nozzle outlet. A ratio of area of the nozzle outlet to area of the throat is selected for expansion of the air through the conduit so that air is emitted from the nozzle outlet in a jet at an ambient pressure. The jet imparts drag on the abrasive particles between the nozzle outlet and the workpiece which has been found to improve abrading of the workpiece by the abrasive particles.

An abrasive water jet nozzle for strengthening, including a chamber, providing a mixing space; and a strengthening mixing assembly, providing a strengthening mixing of water with an abrasive entering the chamber, wherein the strengthening mixing assembly includes a fluid passage and a water stopper block, wherein the water stopper block is located at an eccentric position on one side of the chamber, and an outlet of the fluid passage faces the water stopper block. The provided abrasive water jet nozzle is capable of fully mixing high speed water with the abrasive particles after the high speed water entering the mixing chamber, so as to ensure the uniformity of the strengthening effect, and the formed abrasive water jet is a large circular fan-shaped jet, which can greatly improve the strengthening quality of the abrasive water jet.

An abrasive water jet nozzle for strengthening, including a chamber, providing a mixing space; and a strengthening mixing assembly, providing a strengthening mixing of water with an abrasive entering the chamber, wherein the strengthening mixing assembly includes a fluid passage and a water stopper block, wherein the water stopper block is located at an eccentric position on one side of the chamber, and an outlet of the fluid passage faces the water stopper block. The provided abrasive water jet nozzle is capable of fully mixing high speed water with the abrasive particles after the high speed water entering the mixing chamber, so as to ensure the uniformity of the strengthening effect, and the formed abrasive water jet is a large circular fan-shaped jet, which can greatly improve the strengthening quality of the abrasive water jet.

An apparatus for treatment of a surface has a holding tank configured to mix pressurized gas from the source with an abrasive glass powder, wherein the powder has a mean particulate size of 210 microns or less. A regulator in fluid communication with the holding tank is configured to reduce output pressure from the holding tank to 20 psi or lower. A nozzle is in fluid connection with the holding tank output, the nozzle having a shutoff valve, a feeder tube fitted to the valve and formed of a polymer material, and a hardened metal insert fitted into an end of the feeder tube and having an orifice that is configured to direct the compressed gas and abrasive glass powder to the surface.

An apparatus for treatment of a surface has a holding tank configured to mix pressurized gas from the source with an abrasive glass powder, wherein the powder has a mean particulate size of 210 microns or less. A regulator in fluid communication with the holding tank is configured to reduce output pressure from the holding tank to 20 psi or lower. A nozzle is in fluid connection with the holding tank output, the nozzle having a shutoff valve, a feeder tube fitted to the valve and formed of a polymer material, and a hardened metal insert fitted into an end of the feeder tube and having an orifice that is configured to direct the compressed gas and abrasive glass powder to the surface.