A method of depowdering objects (e.g., heat exchangers) having small and/or complex internal geometries and manufactured using an additive manufacturing technique performed with a powder material. The method includes applying a pressurized fluid to the objects via a pressurized fluid applicator operatively coupled to the object, thereby removing a portion of unbound powder material on or in the object. The method further includes applying vortex vibration to the object via a vortex vibration source operatively coupled to the object, thereby loosening a portion of the unbound powder material remaining on or in the object, and applying the pressurized fluid to the object via the pressurized fluid application, thereby removing a portion of the loosened, unbound powder material from the object. The latter two applying steps are repeated until a specified amount of the unbound powder material has been removed from the object.

A pneumatic device includes a casing unit defining a first chamber, a receiving space and a front space; a cylinder movably received in the receiving space, defining a second chamber and a releasing room, and having an air passage unit and an annular groove; and a hollow piston rod in sliding engagement with the cylinder, and having an inlet channel, a communicating room and an air hole unit. The cylinder and the piston rod are movable to change between a pneumatic state, where the air hole unit is communicated with the inlet channel, the annular groove, the communicating room and the second chamber, and an air discharging state, where the air passage unit is communicated with the second chamber, the receiving space and the releasing room.

A pneumatic device includes a casing unit defining a first chamber, a receiving space and a front space; a cylinder movably received in the receiving space, defining a second chamber and a releasing room, and having an air passage unit and an annular groove; and a hollow piston rod in sliding engagement with the cylinder, and having an inlet channel, a communicating room and an air hole unit. The cylinder and the piston rod are movable to change between a pneumatic state, where the air hole unit is communicated with the inlet channel, the annular groove, the communicating room and the second chamber, and an air discharging state, where the air passage unit is communicated with the second chamber, the receiving space and the releasing room.

A method for decontaminating a low-temperature article to accomplish decontaminating a surface of the such article, and to reduce duration of operations to increase efficiency of decontamination, and a pass box used in such method.

The method includes an applying step of applying a decontamination agent to external surfaces of the article, and a drying step of irradiating the article with agent thereon with ultrasonic waves and drying the surface. In the applying step, a gas, fog or mist of the decontamination agent is supplied to a target surface to form a condensed film of the agent on the target surface. In the drying step, dry air is supplied to the target surface.

A vibration cleaning device, method and system are provided. The vibration cleaning device includes a cleaning module configured to clean an object through a cleaning solution; a cleaning solution delivering module configured to deliver the cleaning solution to the object when the cleaning module performs a cleaning process on the object; a vibrating module configured to vibrate, move and drive the cleaning module to vibrate the object at a predetermined vibration frequency, so that the cleaning module performs vibration cleaning on the object through the cleaning solution; a cleaning tank configured to accommodate the object and the cleaning solution after cleaning the object; a transfer module configured to transfer the uncleaned object to the cleaning tank and transfer the cleaned object out of the cleaning tank; and a control module configured to control working states of the cleaning solution delivering module, the vibrating module and the transfer module.

Methods and apparatus for cleaning large numbers of brushes quickly, comfortably and efficiently are disclosed. The apparatus contains a cleaning chamber comprising cleaning elements disposed on a cleaning plate within the chamber that contacts the brushes during cleaning, the cleaning chamber in contact with a drive and a motor that can deliver repetitive motions to the cleaning elements. Further it comprises a lid configured to hold brushes in securement members on the lid, one or more vibratory motors that provides vibratory motions to the cleaning chamber, and a solvent circulation system that is configured to deliver and drain solvents between the reservoir and cleaning chambers and also filter and recirculate them during the cleaning cycles, and drain out used solvents from the cleaner after a cleaning operation. The apparatus also contains means to hasten drying of washed brushes. Some embodiments allow easy transport of the large capacity cleaner.

Methods and apparatus for cleaning large numbers of brushes quickly, comfortably and efficiently are disclosed. The apparatus contains a cleaning chamber comprising cleaning elements disposed on a cleaning plate within the chamber that contacts the brushes during cleaning, the cleaning chamber in contact with a drive and a motor that can deliver repetitive motions to the cleaning elements. Further it comprises a lid configured to hold brushes in securement members on the lid, one or more vibratory motors that provides vibratory motions to the cleaning chamber, and a solvent circulation system that is configured to deliver and drain solvents between the reservoir and cleaning chambers and also filter and recirculate them during the cleaning cycles, and drain out used solvents from the cleaner after a cleaning operation. The apparatus also contains means to hasten drying of washed brushes. Some embodiments allow easy transport of the large capacity cleaner.

A pipe cleaning robotic device for sludge removal and suction and discharge includes a rail having a plurality of receiving grooves spaced at a predetermined distance on one side thereof; a fixed unit formed at an end of the rail, inserted into a pipe, and fixed in contact with an inner peripheral surface of the pipe; a driving unit mounted on the rail and movable in forward and backward directions along the rail by a wheel drive rotated by an external power; a cylindrical frame for moving and rotating in the forward and backward directions according to driving of the wheel drive; and a sound wave generator formed on one side of an outer circumference of the frame to generate a sound wave to remove the sludge in the pipe cleaning robotic device.

A three-dimensional printer is described, wherein the three-dimensional printer comprises a build unit and a material removal unit. The build unit is configured to generate a three dimensional object. The material removal unit comprises a housing, a plurality of gas inlets and outlets, a plurality of valves and a control unit. The housing is sealed to the build unit and is configured to house a cake comprising the generated three dimensional object. The valves are configured to open and close the inlets and outlets, and the control unit is configured to control the valves, to allow gas to flow from different inlets to different outlets in different flow paths, in order remove powder from the object.

A three-dimensional printer is described, wherein the three-dimensional printer comprises a build unit and a material removal unit. The build unit is configured to generate a three dimensional object. The material removal unit comprises a housing, a plurality of gas inlets and outlets, a plurality of valves and a control unit. The housing is sealed to the build unit and is configured to house a cake comprising the generated three dimensional object. The valves are configured to open and close the inlets and outlets, and the control unit is configured to control the valves, to allow gas to flow from different inlets to different outlets in different flow paths, in order remove powder from the object.