2217results about "Abrasive feeders" patented technology

An abrasive jet apparatus is provided which includes an abrasive dispenser defining a compartment for storing a granular abrasive material and at least one metering orifice disposed in open communication therewith for dispensing the granular abrasive material. The apparatus also includes a shutter assembly disposed adjacent the metering orifice, which includes a shutter member angularly displaceable between first and second positions relative to the metering orifice. The shutter member has formed therethrough at least one shutter opening which in the first position is substantially fully aligned with the metering orifice, and in the second position is substantially fully offset therefrom. The apparatus further includes a position actuator operatively coupled to the shutter mechanism for reversibly displacing the shutter member to the first and second positions and a plurality of intermediate positions therebetween for occluding a selective portion of the metering orifice. A flow rate of the abrasive material dispensed through said metering orifice is thereby maintained at a predetermined level.

A display device, comprising: a pixel array unit having display elements formed in vicinity of intersections of signal lines and scanning lines arranged in length and breadth, image pickup units and an output unit which outputs binary data corresponding to image picked up by said image pickup unit; a image pickup device provided separate from said image pickup unit; a first image processing unit configured to generate multiple gradation data based on multiple binary data picked up by said image pickup units based on multiple image pickup conditions; and a second image processing unit configured to receive either the image pickup data picked up by said image pickup device or the multiple gradation data generated by said first image processing unit, to conduct a prescribed image processing.

The invention enables accurate control of particle flow with regard to feeding abrasive material to a surface. The unit does not employ a vibrator and may be used to remove undesired material from a surface. A particular application is in a dental air abrasion unit for both cleaning and cutting tooth surfaces. When used in an air abrasion dental instrument, the abrasive material is stored in a container which is separated from a mixing chamber by an orifice member. The flow of particles is electronically controlled by the differential in pressure in the container section above the particle level and the pressure below an orifice member in a mixing chamber. The resulting particle flow to the surface is substantially linear and less erratic than that of prior air abrasion instruments.

A device, a system employing the device, and method of performing skin treatment are provided for skin treatment. The device includes a vacuum head base defining a chamber therein and having a substantially smooth treatment tip attached and extending from an end thereof or integral therewith. The tip has at least one central opening that is open to the chamber, and is adapted to contact the skin and traverse the skin in a substantially nonabrasive manner. A vacuum access opening is provided through a side wall of the vacuum head base and adapted to connect with a source of vacuum. A tissue stop member is located within the chamber. It may have an abrasive surface for exfoliating skin cells, or a smoother surface for traversing the skin without substantial abrasion.

A powder blast tool for mixing a powder with a pressurised gas, having at least one powder reservoir, with supply lines for the pressurised gas, and a discharge line, which is connected to a discharge nozzle, at which a powder-gas mixture and optionally pressurised water are discharged, wherein the powder blast tool can preferably be connected to plural powder reservoirs simultaneously and exchangeably, wherein at least one receiving region with at least one mixture terminal and at least one gas terminal is disposed on the powder blast tool and wherein the powder reservoir has a coupling region for exchangeable connection of the powder reservoir to the powder blast tool. Also disclosed are a suitable powder reservoir and an insert for such powder reservoirs and a corresponding method of dental treatment.

A particle blast system includes a feeder assembly having a rotor with a plurality of pockets formed in the peripheral surface. The transport gas flowpath includes the pockets, such that substantially all transport gas flows through the pockets. The seal adjacent the peripheral surface is actuated by the transport gas pressure to urge its sealing surface against the rotor's peripheral surface. At start up, there is no substantial pressure between the seal and the rotor, reducing start up torque requirements.

A method is provided for removing iron oxide scale from sheet metal and producing a sheet metal surface with rust inhibitive properties. The sheet metal is advanced through the descaling cell and a slurry mixture is propelled against at least one of the top surface and bottom surface of the sheet metal across the sheet metal width as the material is advanced through the descaling cell. The rate of slurry impact against the at least one of the top surface and bottom surface of the sheet metal is controlled in a manner to remove substantially all of the scale from a surface of the sheet metal, and in a manner to create a passivation layer on the descaled surface of the sheet metal. The passivation layer comprises at least one of silicon, aluminum, manganese and chromium and inhibits oxidation of the descaled surface of the processed sheet metal.

A magnetorheological fluid delivery system includes a mixing and tempering vessel. Fluid is admitted to the vessel via a plurality of tangential ports, creating a mixing of the fluid in the vessel and promoting homogeneity. Fluid may be reconstituted in the vessel by metered addition of carrier fluid. A fixed-speed centrifugal pump disposed in the vessel pressurizes the system. Fluid is pumped through a magnetic-induction flowmeter and a magnetic flow control valve having solenoid windings whereby MR fluid is magnetically stiffened to restrict flow. A closed-loop feedback control system connects the output of the flowmeter to performance of the valve. A nozzle having a slot-shaped bore dispenses MR fluid for re-use in the work zone. A planar-diaphragm flush-mounted pressure transducer at the entrance to the nozzle and flowmeter inferentially measure relaxed viscosity and provide signals to a computer for dispensing metered amounts of carrier fluid into the mixing vessel to assure correct composition of the reconstituted fluid as it is dispensed.

An abrasivejet cutting head is disclosed that includes a valve assembly for presenting back-flow to the abrasive hopper of abrasive-laden fluid from the cutting head when the discharge path for the abrasivejet becomes clogged or otherwise blocked. The valve assembly is positioned within the abrasive line to conduct abrasive from the hopper towards the abrasivejet nozzle. The valve assembly further includes a discharge path which is scaled off from the abrasive jet nozzle during normal operation in response to the relative lower pressure in the abrasivejet nozzle that results from the flowing fluid therein. If the jet path is blocked or impeded in a manner that causes a backflow of the abrasive-laden slurry therein, the cessation of low-pressure permits the backflowing slurry to exit via the discharge path and bypass the hopper, substantially avoiding the downtime previously required to clean the hopper.

An abrasive waterjet assembly has a cutting head assembly with a venting system for controlling the flow of abrasive within a cutting head body. The venting system includes one or more vents for regulating the pressure within a cutting head body to minimize, limit, or substantially eliminate any abrasive from reaching a jewel orifice. The vents include venting ports positioned between an orifice mount that retains the jewel orifice and a mixing region in which abrasive is mixed with a fluid jet produced by the jewel orifice. An isolator retained in the cutting head body further inhibits the upstream flow of abrasive, if any.

A waterjet system selectively produces fluid jets for water jet cutting or abrasive jets for abrasive-waterjet-cutting. The abrasive materials in the abrasive jet are determined based on the properties of the workpiece. The waterjet system includes an abrasive delivery system that is capable of delivering either a single abrasive or a plurality of abrasives as an abrasive blend, to a cutting head assembly. The cutting head assembly entrains the abrasive into a fluid jet to form an abrasive jet.

The invention belongs to equipment for cleaning the surface of a machine element by utilizing a shot blasting method, in particular to an automotive gear enhanced shot blasting machine. According to the technical proposal provided by the invention, the shot blasting machine is arranged on a shot blasting cleaning chamber. The invention is characterized in that a suspend conveyer installed on a supporting bracket is arranged at the upper part of the shot blasting cleaning chamber, the suspend conveyer is in a sealed state and circled around the shot blasting cleaning chamber, and one section passes through the shot blasting cleaning chamber, a plurality of rotating racks which can rotate under the driving of the suspend conveyer are suspended on the suspend conveyer, a curtain separator is arranged above/on the shot blasting cleaning chamber, a chamber hoisting gear is arranged on the flank of the shot blasting cleaning chamber, and a worm conveyer is arranged at the bottom of the shot blasting cleaning chamber. The input end of the curtain separator is connected with the output end of the chamber hoisting gear, and the output end of the worm conveyer is connected with the input end of the chamber hoisting gear. The invention can improve the effect of the shot blasting cleaning and the quality of the product.

An improved orifice assembly for use with an ultra high pressure fluid jet cutting apparatus is disclosed. The improved orifice assembly generally includes an orifice body defining a central bore, a high pressure inlet cavity located at an upstream portion of the body, a mixing cavity located at a downstream portion of the body, and an abrasive material inlet bore that is in direct communication with the mixing cavity. The inlet or high pressure cavity preferably has a cylindrical cross section at the side wall portion and a generally flat bottom wall, with a constant radius transition portion between the side and bottom walls. A jeweled orifice is preferably located at the bottom wall and forms a portion thereof. A chamfer at the downstream portion of the mixing chamber permits appropriate coaxial alignment of a mixing tube with the jeweled orifice so as to preserve proper fluid flow characteristics. In addition, the incorporation of a soft seal between the mating surfaces of the inlet body and the orifice assembly permit easy user removal of these components from a cutting jet system.

The present invention relates to a device in the technical field of material processing, in particular to a peener which carries out the surface deformation strengthening process on magnesium alloy samples. The present invention comprises a main peening system, an upper whirlwind separation system, a dedusting system, an air compression system and an electric system, wherein, the upper whirlwind separation system is positioned on the upper end of the main peening system, the lower part of the upper whirlwind separation system is communicated with the main peening system, the upper part is connected with the dedusting system, which is positioned outside the main peening system, the air inlets of both the dedusting system and the main peening system are connected with the air compression system, and the electric system is connected with the main peening system, the upper whirlwind separation system, the dedusting system and the air compression system. The present invention can conveniently assemble and disassemble the samples of the shaft class, the range of the generated peening strenghth is wide, the effect and uniformity of peening is good, and moreover, pollution can be prevented.

A system and method for managing abrasive blasting may include timing duration of blast media being blown in performing abrasive blasting using an abrasive blasting machine. Time duration that an operator worked in association with the duration of the blast media being blown may be received. A blasting efficiency ratio may be computed based on the duration of the blasting media being blown and duration of that the operator worked. The blasting efficiency ratio may be displayed to a user.

The invention discloses an abrasive automatic feeding device for feeding abrasives through mixing abrasive water jet forward. The device is mainly composed of a hopper, a jet flow pump, a high-pressure abrasive tank, a valve seat installed on the upper part of the high-pressure abrasive tank and a mixing cavity installed on the lower part of the high-pressure abrasive tank; the valve seat is connected with a sand adding pipeline, a high-pressure water pipeline, a low-pressure water pipeline and a safety valve; and the mixing cavity is also connected with the high-pressure water pipeline, an abrasive pipeline and an abrasive water jet flow pipeline. Each flow inlet and each flow outlet as well as each functional component are connected through high-pressure pipelines which are internally provided with high-pressure ball valves, throttling valves and pneumatic ball valves for controlling the pipelines; the jet flow pump is arranged between a feeding pump and the sand adding pipeline; and through the negative pressure effect of the jet flow pump, the abrasive adding operation of the high-pressure abrasion tank is realized. Through the connection and disconnection combination of the high-pressure ball valves, throttling valves and pneumatic ball valves, the device can respectively achieve the three kinds of operations including pure water jet flow, automatic feeding and abrasive water jet flow, is simple in structure, is convenient to operate, is safe and reliable, and can be widely applied to a forward mixing abrasion water jet flow generation system.