A method for manufacturing a compressor scroll that appropriately impinges cavitation bubbles on target regions of a scroll. The method includes the step of water jet peening by jetting cavitation bubbles generated underwater by a water jet at a first side of an end plate (13A) of the scroll (13), with a center (P1, P2, P3) of the cavitation bubbles being offset from a center (O) of the spiral shape of a wall portion (13B) on the end plate (13A) and the step portion (13Aa) and the stepped portion (13Ba) positioned at an outer peripheral portion of the cavitation bubbles (C).

A rust inhibiting process 100 for cleaning and protecting a target object 902 is disclosed. Comprising mixing at least a rust inhibitor 620 and a fluid 618 into a slurry mixture 608, spraying the slurry mixture 608 at the target object 902 from within a reservoir 610 of a slurry blasting system 202, separating a tarnished top layer 906 and a parent metal 904 of the target object 902 with a slurry stream 908, cleaning the parent metal 904 with the rust inhibitor 620, preventing the parent metal 904 from impregnating with contaminants during cleaning with the rust inhibitor 620, and protecting the parent metal 904 with the rust inhibitor 620 after spraying is complete. The slurry stream 908 comprises the slurry mixture 608 of the slurry blasting system 202 being sprayed with the slurry blasting system 202. The slurry blasting system 202 comprises a tank 204.

A method for removal of residual matter includes delivering an ultra high-pressure fluid jet to an intermediate additively manufactured three-dimensional (3D) component to dislodge and remove at least a portion of the residual matter from an internal surface of the intermediate additively manufactured 3D component, or from an external surface of the intermediate additively manufactured 3D component, or both, to form a cleansed additively manufactured 3D component.

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.

An abrasive water jet cutting machine including pumping means, which can be fluidically connected to a water source, for the generation of a pressurized water flow; a cutting head, forming a mixing chamber and a focusing nozzle; a dispensing system of powdered abrasive material, including a tank containing powdered abrasive material, a feeding pipe, fluidically connecting the tank to the mixing chamber of the cutting head, a dispenser, which dispenses the powdered abrasive material contained in the tank into the mixing chamber by means of the feeding pipe; wherein the pressurized water flow originating from the pumping means is conveyed into the mixing chamber of the cutting head where the pressure energy of the pressurized water flow is converted into kinetic energy so as to form a water jet; wherein the cutting head mixes, in the mixing chamber, the abrasive material with the water jet forming a water-abrasive material mixture jet, and the cutting head dispenses the water-abrasive material mixture jet by means of the focusing nozzle; wherein the powdered abrasive material contained in the tank is homogeneously dispersed in suspension in a gelatinous water-based fluid; and wherein the mass ratio of the dispersed powdered abrasive material to the gelatinous water-based fluid is from 1.0 to 3.5.

A composition comprising a fluid, and a material dispersed in the fluid, the material made up of particles having a complex three dimensional surface area such as a sharp blade-like surface, the particles having an aspect ratio larger than 0.7 for promoting kinetic boundary layer mixing in a non-linear-viscosity zone. The composition may further include an additive dispersed in the fluid. The fluid may be a thermopolymer material. A method of extruding the fluid includes feeding the fluid into an extruder, feeding additives into the extruder, feeding a material into the extruder, passing the material through a mixing zone in the extruder to disperse the material within the fluid wherein the material migrates to a boundary layer of the fluid to promote kinetic mixing of the additives within the fluid, the kinetic mixing taking place in a non-linear viscosity zone.

The invention relates to a method for reconditioning a remote control (1) with a housing consisting of an upper shell (2) and a lower shell (3), and a printed circuit board (21) carrying raised keys (5) for triggering control signals by pressure, the raised keys (5) penetrating the upper shell (2), said method comprising: removing (52) the upper shell (2) and the lower shell (3); blasting (55) at least one of the raised keys (5) on the printed circuit board (21) with an antibacterial abrasive; and inserting (58) the printed circuit board (21) with the raised keys (5) supported thereon between a new upper shell (2) and a new lower shell (3).

The invention relates to a plastic blasting agent A and the use of a plastic blasting agent A, comprising at least one particle PA1 made from at least one polymer KA1 and at least one foreign particle FA1 for the surface treatment of a component that was created using additive manufacturing.

An abrasive water jet cutting machine including pumping means, which can be fluidically connected to a water source, for the generation of a pressurized water flow; a cutting head, forming a mixing chamber and a focusing nozzle; a dispensing system of powdered abrasive material, including a tank containing powdered abrasive material, a feeding pipe, fluidically connecting the tank to the mixing chamber of the cutting head, a dispenser, which dispenses the powdered abrasive material contained in the tank into the mixing chamber by means of the feeding pipe; wherein the pressurized water flow originating from the pumping means is conveyed into the mixing chamber of the cutting head where the pressure energy of the pressurized water flow is converted into kinetic energy so as to form a water jet; wherein the cutting head mixes, in the mixing chamber, the abrasive material with the water jet forming a water-abrasive material mixture jet, and the cutting head dispenses the water-abrasive material mixture jet by means of the focusing nozzle; wherein the powdered abrasive material contained in the tank is homogeneously dispersed in suspension in a gelatinous water-based fluid; and wherein the mass ratio of the dispersed powdered abrasive material to the gelatinous water-based fluid is from 1.0 to 3.5.

Described are finishing mediums for removing support material and/or for surface finishing of objects made via additive manufacturing techniques. The finishing medium is an aqueous solution containing 1-20% by weight a polyol, 1-20% by weight an anti-corrosion agent, 0.001-10% by weight a hydrotrope. The finishing medium may optionally suspend media particles, thereby forming a finishing suspension. Also described are methods of using the finishing media and finishing suspensions described herein.