Multihole orifice

Keywords Discrete polydisperse spray Electric droplet charging Extension nozzle Ink-jet printing Monodisperse droplet stream Monodisperse spray Multihole orifice Modulated jet excitation Nozzle hole shapes Rapid prototyping Rayleigh-type jet break-up Solder ball production... 

Extrusion Processes. Polymer solutions are converted into fibers by extmsion. The dry-extmsion process, also called dry spinning, is primarily used for acetate and triacetate. In this operation, a solution of polymer in a volatile solvent is forced through a number of parallel orifices (spinneret) into a cabinet of warm air the fibers are formed by evaporation of the solvent. In wet extmsion, a polymer solution is forced through a spinneret into a Hquid that coagulates the filaments and removes the solvent. In melt extmsion, molten polymer is forced through a multihole die (pack) into air, which cools the strands into filaments. 

In sprays produced by multihole nozzle orifice plates, the droplet concentratiOTi depends on the arrangement of the holes in the orifice. Taking a two-dimensional hexagonal nozzle hole arrangement with the constant spacing s, the spatial droplet number concentration reads... 

Adj = abrasion-induced reduction in the particle diamter in interval i, defined by Eq. (42), m dot diameter of an orifice in a multihole gas distributor, m... 

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