Abstract:
A powder spray coating system has a controller configurable to a variety of different system configurations. Configuration data is keyed by an operator from menu prompts and stored for use by a microprocessor based operating program to operate the supply of powder and air to a powder spray gun. The microprocessor also presents information from monitored parameters of the system, including the supply air dew point which is monitored to provide warning signals of potential condensation in the system. Dew point detection is accomplished by measuring temperature and relative humidity and comparing the measurements with values for air at the maximum acceptable dew point. Alternatively, measurement of absolute humidity and supply air pressure are used to compute the dew point of the air which is compared with the actual temperature and maximum dew point temperature.
Abstract:
A method and apparatus for pumping a steady flow of powder from a powder spray gun of a powder spray system by pumping the powder from a fluidized bed feed hopper to the spray gun via a small auxiliary fluidized bed hopper located in close proximity to the powder spray gun. The apparatus comprises a primary fluidized bed hopper into which reclaimed powder is supplied from a powder spray booth via a powder filter module and a sieve. Powder from the primary feed hopper is pumped to the gun via an auxiliary and much smaller capacity auxiliary fluidized bed hopper located in relative close proximity to the spray gun.
Abstract:
A booth in which electrically charged particulate material is sprayed onto a workpiece having an opposite charge, so that the particles are electrostatically attracted to the workpiece, has all of its walls that confront the workpiece made of electrical insulating material. A grid-like arrangement of parallel, spaced apart electrodes, insulated from each other, extends across the entire area of every wall, parallel to a surface of the wall and in intimate juxtaposition thereto. Each electrode is connected with one terminal of an alternating high voltage source, every electrode with a different terminal than each of the electrodes laterally adjacent to it, to produce a constantly varying field that electrodynamically repels particles from the wall.
Abstract:
An exemplary embodiment of the present invention provides an electrostatic metal porous body forming apparatus including: a transfer module transferring a porous body substrate; and a coating module coating a metal powder on the porous body substrate, wherein the transfer module includes a substrate supporter fixing the porous body substrate while the porous body substrate is transferred, and wherein the coating module includes: an electrifier including a first electrode electrifying the metal powder, a second electrode facing the first electrode, a first power supplier connected with the first electrode supplying electricity to the first electrode, and a second power supplier connected with the second electrode supplying electricity electrified with an opposite charge to a charge caused by the electrification of the first electrode to the second electrode, and generating a pulse type of voltage; and a metal powder supplier including a metal powder vessel storing the metal powder therein and supplying the metal powder to the outside, and an outlet separately disposed above or below the porous body substrate injecting the metal powder, and transferring or injecting the metal powder that is electrified and coated by the electrifier.
Abstract:
A particulate feeding apparatus for applying particulate, such as super-absorbent materials, to a substrate, such as a fibrous web. A feeder tube for the powder and a rotary gate valve, including one or more holes is provided. This structure may then intermittently feed particulate to an eductor or venturi nozzle. The rotary valve provides an intermittent supply of particulate to a relatively low-pressure zone at the nozzle formed by the venturi action of the passing air stream and the particulate may be distributed precisely where desired. A process for delivering powder to a substrate in precise amounts and distribution patterns is also disclosed.
Abstract:
The invention relates to a device for conveying coating powder from a powder container. The powder conveying device has a powder conveying pipe having a powder inlet, by means of which coating powder can be fed from a powder container to the powder conveying pipe, in particular by means of suction. Furthermore, a powder conveying pipe retainer is provided in order to retain the powder conveying pipe. The powder conveying pipe can be preferably optionally moved in relation to the powder conveying pipe retainer in the longitudinal direction of the powder conveying pipe, wherein in order to clean the powder conveying pipe, the powder inlet of the powder conveying pipe can be closed and a compressed air line can be connected to the powder pipe.
Abstract:
The invention relates to a device for conveying coating powder from a powder container. The powder conveying device has a powder conveying pipe having a powder inlet, by means of which coating powder can be fed from a powder container to the powder conveying pipe, in particular by means of suction. Furthermore, a powder conveying pipe retainer is provided in order to retain the powder conveying pipe. The powder conveying pipe can be preferably optionally moved in relation to the powder conveying pipe retainer in the longitudinal direction of the powder conveying pipe, wherein in order to clean the powder conveying pipe, the powder inlet of the powder conveying pipe can be closed and a compressed air line can be connected to the powder pipe.
Abstract:
A method of producing a honeycomb filter using a production apparatus that includes: a workpiece securing section for securing a base of a honeycomb filter; a powder transfer section for transferring a powder together with a pressurized gas (e.g., air); an introduction section for introducing the powder that has transferred from the powder transfer section into the base secured by the workpiece securing section when the apparatus is used; a suction section for sucking the gas that has passed through the base secured by the workpiece securing section using suction means; a cleaning section for removing a surplus powder adhering to an end face of the base after the introduction of the powder; a judgment section for judging an amount of the powder adhering to the base; and a workpiece transfer section for transferring the base among the workpiece securing section, the cleaning section, and the judgment section.
Abstract:
The present invention relates to a method for spraying particulate solids onto a substrate, comprising the steps of: coating the substrate with a wet and/or adhesive synthetic resin layer, building up a gas pressure in a line, generating a pressure differential in the line, swirling and carrying along particulate solids in the line, ejecting swirled, particulate solids from the line onto the surface of the wet and/or adhesive synthetic resin layer of the substrate. The invention also relates to a substrate, in particular a wood-based panel or decorative paper, at least partially coated with a particulate solid, characterized in that the particulate solid is applied to the substrate with an accuracy of up to ±0.8 g/m2, preferably of up to ±0.5 g/m2, particularly preferably of up to ±0.3 g/m2, preferably of up to 0.1 g/m2.