Abstract:
The invention provides a method for determining the composition of fluidizable solid matter particles, such as powder particles, in which the solid matter particles are fed through a measuring resonator device comprising a high frequency resonator under defined feeding conditions, and a change of the resonant frequency and/or the amplitude of the high frequency resonator is detected in the measuring resonator means, said change being caused by the fed solid matter particles.
Abstract:
The invention relates to a method for producing a profile by extruding powdered metal and/or powdered metal alloys. According to said method, a powder feedstock is heated to an extrusion temperature below the melting temperature of the powder and is expelled under pressure through an opening in a die to form the section. At least one metal or a metal alloy of the powder is a reactive metal that spontaneously forms a natural oxide layer on a free surface and/or the powder contains fibre-type particles that are distributed homogeneously in the powder feedstock and that absorb microwave radiation. The powder feedstock is heated to an extrusion temperature by microwave irradiation. The method permits rapid, uniform heating in all regions of the powder feedstock.
Abstract:
A powder coating assembly comprising a compartment (1) in which workpieces (3) are coated with powder and which includes a discharge belt (15) for conveying excess powder to a recovery unit (5) or a filter unit (4) is characterized in that both a recovery unit (5) and a filter unit (4) are provided, each connected by a separate conduit (16; 18) to an exhaust opening (17; 19) of the compartment (1), and in that a shutoff member (42) is provided in the separate conduits (16; 18) for selectively blocking conveyance of powder to the filter unit (4) or the recovery unit (5).
Abstract:
A powder coating system and method comprises a plurality of coating units arranged substantially vertically one on top of the other for simultaneous powder discharge to a workpiece which is moved in horizontal direction past the coating units, and further comprises a monitoring means for detecting a powder stream which flows through the respective coating units.
Abstract:
The invention relates to a control system of a coating apparatus for a coating medium, such as powder or wet lacquer, comprising at least one coating device, in which a quantity measuring means for determining the amount of coating medium supplied to the coating device, a quantity control means for setting the quantity of the coating medium to be discharged by the coating device, and a digital control device for controlling the operation of the coating device are associated to the or any coating device, wherein the control device, the quantity measuring means and the quantity control means are connected to one another by a bus structure.
Abstract:
Apparatus and method of determining the surface condition of a workpiece, operate by measuring a roughness profile of the surface across a certain measuring distance, splitting up the roughness profile into wave frequencies and amplitudes associated with them, dividing the wave frequencies into wave frequency ranges, and determining the surface condition of the workpiece based on the amplitudes in the respective wave frequency ranges. The roughness profile may be understood as the superpositioning of harmonic oscillations having certain wavelengths and amplitudes. By subjecting them to a Fourier analysis, these harmonic oscillations are split up into their wave frequencies and associated amplitudes. Then wave frequency ranges are combined to form bands such that a high intensity in one of the bands each corresponds to a certain physical appearance of the surface. The invention thus provides an objective, calculable measure of the surface condition of a workpiece.
Abstract:
A cleaning device for a powder coating compartment that comprises a tube system that can be moved back and forth under motor drive through the compartment with a conveyor that passes through a longitudinal slot in the compartment roof and that is equipped with nozzles through which compressed air can be blown against the compartment walls, The tube system comprises two tube branches that are respectively arranged at the contour of the compartment roof and the compartment side walls symmetrically relative to a longitudinal center plane; and in that the compartment floor not swept by the tube system is covered by a discharge belt for eliminating excess powder. The belt is cleaned by a belt cleaning mechanism.
Abstract:
A trace gas detector including in a closed gas loop, two baffle cells with an intermediate trace gas filter, each baffle cell consists of an ionization source, a labyrinth-like recombination zone and a collector electrode. A differential circuit derives a differential signal from output signals of the two baffle cells, the differential signal depending only on the trace gas concentration. Temperature changes and supply voltage changes are compensated by means of the differential circuit.
Abstract:
The present invention relates to compound materials comprising a metal and nanoparticles, in particular carbon nano tubes (CNT), characterized in that the compound has a metal crystallite structure of crystallites having an average size which is in the range of higher than 100 nm and up to 200 nm, preferably between 120 nm and 200 nm.
Abstract:
The invention relates to the processing of a composite material in particle or powder form, containing carbon nanotubes (CNT), said material having metal with a thickness of between 10 nm and 500,000 nm that is layered alternately with carbon nanotubes of a thickness of between 10 nm and 100,000 nm. The material is produced by mechanical alloying, i.e. by repeated deformation, breakage and welding of metal particles and CNT particles, preferably by milling in a pebble mill containing a milling chamber and milling pebbles as the milling bodies and to a rotating body for creating highly energetic pebble collisions. The invention discloses a method for producing duplex-aluminium, in which a material is alloyed as a combination of the composite material and an aluminium alloy with different characteristics in an Ospray process.