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 booth (101) for elements to be coated. The coating booth (101) comprises a passage between opposing vertical sides (107a, 107b, 108a, 108b) through which elements to be coated are conveyed. There is an entrance (105) at one end of the passage and an exit (106) at the other end of the passage. The coating booth (101) comprises a conveyor line (102) for supporting said elements to be coated and configured to convey said elements from the entrance (105) to the exit (106) along a straight pathway, and, a suction system. The opposing sides of the channel are symmetrical about the pathway. Sets of spray guns (103a, 104a, 103b, 104b) for spraying coating powder at the elements are positioned symmetrically either side of the straight pathway. The suction system comprises vertical suction inlets (109a, 109b) mounted opposite one another on each opposing vertical side of the passage, the suction system being configured to provide equal amounts of suction through each of the opposing vertical suction inlets (109a, 109b).

The present invention relates to a wet type dust collector using electrospray and a vortex, the dust collector having a cyclonic structure and removing dust contained in exhaust gas by spraying fine droplets that are generated when high voltage is applied to the dust collector. More particularly, the present invention relates to a wet type dust collector using electrospray and a vortex, the dust collector including: a cylinder having an exhaust gas intake pipe for guiding exhaust gas containing granular pollutants at a predetermined position on the outer side, and forming an empty space; a hollow cone tapered downward, connected to the bottom of the cylinder at the top, and having a liquid discharge port at the bottom; a lid through which a hollow cylindrical gas discharge pipe is disposed to discharge gas with granular substances removed to the outside and, that is disposed on top of the cylinder; a positive (+) lead wire connected to the cylinder; and a negative () lead wire connected to the gas discharge pipe, in which a liquid container having one or more liquid spray ports is disposed on the gas discharge pipe.

A head is disclosed for use with a continuous manufacturing system. The head may have a housing configured to receive a matrix and a continuous fiber, and a diverter located at an end of the housing. The diverter may be configured to divert radially outward a matrix-coated fiber. The head may also include a cutoff having an edge configured to press the matrix-coated fiber against the diverter.

An electrostatic painting device capable of reducing any AC or electromagnetic emissions when the device is powered on is provided. The emissions affect electronic components present during painting of various objects or even when the device is powered on. The electromagnetic induction into the conductive circuit elements in turn induces voltages and currents, which potentially harm the micro-electronic circuits. One such device includes a choke between a fluid tip and a high voltage source of the device to reduce these emissions. The voltage source may include at least one capacitor which supplies the AC emissions representing electromagnetic emissions risk during the discharge of paint from the device. The choke connected to the voltage source substantially reduces the emissions involved during the paint discharge, while allowing the discharge of electrons, thereby imparting negative DC charge to the paint and the workpiece, and preventing damage to electronic circuits during the process.

A powder spraying head for spraying a powder on a can body to be coated comprises a work chamber inside the powder spraying head, a powder tube for providing the powder, a charging electrode for charging the powder with an electrostatic charge and a guiding electrode for deflecting the powder present inside the work chamber substantially in the direction of the work opening. The charging electrode is arranged in the area of the powder outlet and is formed with a tip in the direction of the powder streaming into the work chamber. Additionally or alternatively, the guiding electrode is plate-shaped and a flat side of the guiding electrode is oriented towards the work chamber.

An electrostatic painting device capable of reducing any AC or electromagnetic emissions when the device is powered on is provided. The emissions affect electronic components present during painting of various objects or even when the device is powered on. The electromagnetic induction into the conductive circuit elements in turn induces voltages and currents, which potentially harm the micro-electronic circuits. One such device includes a choke between a fluid tip and a high voltage source of the device to reduce these emissions. The voltage source may include at least one capacitor which supplies the AC emissions representing electromagnetic emissions risk during the discharge of paint from the device. The choke connected to the voltage source substantially reduces the emissions involved during the paint discharge, while allowing the discharge of electrons, thereby imparting negative DC charge to the paint and the workpiece, and preventing damage to electronic circuits during the process.

A dry powder coating apparatus for coating pharmaceutical solid dosage forms includes a housing; a drum coater; a powder coating system; a liquid spray system; a ventilation system; a heating system; a touch screen control panel; and an operation box. The drum coater may have a truncated cone on both sides, in which one side is opened and another side is closed. The drum coater is horizontally placed inside the operation box along its axis and fixed on a rotatable shaft and a motor drives the rotatable shaft and rotates the drum coater about its own axis.

An electrostatic spray application apparatus and method for producing an electrostatically charged and homogeneous CO.sub.2 composite spray mixture containing an additive and simultaneously projecting at a substrate surface. The spray mixture is formed in the space between CO.sub.2 and additive mixing nozzles and a substrate surface. The spray mixture is a composite fluid having a variably-controlled aerial and radial spray density comprising pressure- and temperature-regulated propellant gas (compressed air), CO.sub.2 particles, and additive particles. There are two or more circumferential and high velocity air streams containing passively charged CO.sub.2 particles which are positioned axis-symmetrically and coaxially about an inner and lower velocity injection air stream containing one or more additives to form a spray cluster. The axis-symmetrical CO.sub.2 particle-air streams are passively tribocharged during formation, and the spray clustering arrangement creates a significant electrostatic field and Coanda air mass flow between and surrounding the coaxial flow streams.

Devices and methods for electrostatic application of cosmetics are described. In one embodiment, a system for electrostatic deposition of cosmetic material on a surface includes: a housing; a nozzle configured for breaking the cosmetic material into cosmetic particles and for directing the cosmetic particles out of the housing and toward the surface; and a reservoir configured for holding the cosmetic material. The reservoir is connected to the nozzle. The system also includes an airflow conduit configured to provide air to the nozzle; and a nozzle electrode configured proximately to the nozzle. The nozzle electrode is configured to charge the cosmetic particles.