A method is disclosed for additively manufacturing a composite structure. The method may include coating a continuous strand with a matrix, discharging a composite tubular structure made from the coated continuous strand, and exposing the matrix in the composite tubular structure to light to cure the matrix during discharging. The method may also include depositing a material layer onto an internal surface of the composite tubular structure as the composite tubular structure is being discharged, and wiping a squeegee over the material layer.

A coating system includes a support fixture sized to be partially inserted into one or more openings of a component and a spray nozzle segment device comprising a housing configured to receive a slurry. The device is disposed radially outward of a central axis of the component and is shaped to extend circumferentially about at least part of the central axis of the component. The housing comprises plural delivery nozzles configured to spray the slurry onto a surface of the component. The device is operably coupled with the support fixture such that the fixture maintains a position of the device within the component when the support fixture is partially inserted into one or more openings of the component.

An apparatus and method for treating a surface with a jet comprising a multiplicity of particles, the apparatus including at least one nozzle unit, which is designed for providing a stream of propellant gas mixed with a multiplicity of particles, and an enclosure of the nozzle unit, the enclosure being arranged at such a distance from the nozzle unit that a gap is formed between the nozzle unit and the enclosure.

An apparatus and method for treating a surface with a jet having a multiplicity of particles, comprising an outer nozzle and at least two inner nozzle units, which are enclosed by the outer nozzle and are designed to introduce in each case a stream of propellant gas mixed with a multiplicity of particles into the outer nozzle, the outer nozzle being designed to combine the streams of propellant gas of the inner nozzle units to form an overall stream of propellant gas.

An inner surface-modified tube includes fine particles that are buried in an inner surface of a tube with part of surfaces of the fine particles exposed, wherein the fine particles are unevenly distributed such that more fine particles are distributed in a region from a center of the tube to the inner surface of the tube than in a region from the center of the tube to an outer surface of the tube based on a thickness direction of the tube, an arithmetic average roughness Ra of the inner surface of the tube is 1 nm or more and 100 m or less, a particle diameter of each fine particle is 10 nm or more and 100 m or less, and an inner diameter of the tube is 0.01 mm or more and 100 mm or less.

A liquid mixture supplying device is provided for mixing a liquid mixture of a liquid and a powder and supplying the liquid mixture to a spray valve for spraying. The device has a structural design consisting of a containing vessel, a driving device, a dip tube and a scraper. The containing vessel is provided for storing the liquid mixture, and the driving device drives the containing vessel to rotate while a scraper disposed on a side of a dip tube is being used for distributing the liquid mixture. The containing vessel is installed in a tiltable external cavity, and a flow barrier is formed on an inner wall of the containing vessel, and the driving device drives the containing vessel to move by a magnetic force or a transmission shaft, so as to achieve the effect of uniform mixing.

A method and device for coating projecting surfaces of discrete projections of a product substrate that has functional units arranged at least partially in recesses. The method includes the steps of: bringing the projecting surfaces into contact with a coating material that is applied on a carrier substrate, and separating the carrier substrate from the projecting surfaces in such a way that the coating material remains partially on the product substrate. In addition, this invention relates to a corresponding device.

There is disclosed a spray gun for spray deposition of 2D material onto substrate surfaces so as to allow for subsequent laser patterning or etching of said material into a metamaterial. The gun comprises: a housing 1 capable of accepting a propulsion device for propulsion of the material, wherein said housing 1 accommodates a reservoir for loading material to be deposited by spraying: and a nozzle 4 for directing the material to be sprayed by the gun. The nozzle 4 includes converging and diverging inner bore sections so as to enable propulsion of material at a supersonic speed.

An atomizer for applying a coating includes a nozzle plate, an actuator, and an acoustic focusing device. The nozzle plate defines at least one aperture. The actuator is configured to oscillate to form pressure waves within a fluid to eject the fluid from the nozzle plate. The acoustic focusing device focuses the pressure waves toward the apertures.

Provided are a masking jig, a film formation method, and a film formation device that enable efficient formation of a film with consistent quality on the surface of a substrate. A masking jig is used in a thermal spraying method, and includes a body portion. The body portion includes a first surface and a second surface. The second surface is located on a side opposite to the first surface. The body portion has a through hole formed therethrough extending from the first surface to the second surface. The second surface includes inclined surfaces having inclination angles ?1 and ?2 of larger than or equal to 30? and smaller than 90? with respect to the first surface. An open end of the through hole in the second surface is formed in the inclined surfaces.