Dispensing – Molten metal dispensing – Flow controllers or assists
Reexamination Certificate
2005-03-15
2005-03-15
Kastler, Scott (Department: 1742)
Dispensing
Molten metal dispensing
Flow controllers or assists
C222S591000
Reexamination Certificate
active
06866171
ABSTRACT:
A method introduces additives into flowing or fluidised media. The spatially predetermined position of the additives in the flowing material, also called fluid bed, is obtained by controlling the pulsating injection, The introduction and exact dosing of additives, that is hardeners, dyes, gas producers and softener for instance, into a liquid plastic stream or metal stream (10) for instance, or the fluid bed of bulk material, such as powder, granules and pellets, is carried out by means of an injector. The invention is used in melting units, in hot channel systems, in tools, componens of tools and injection moulding machines, extruders, injection moulding, pelleting, burner and injection arrangements. The nozzle needle (3) of at least one nozzle (2), respectively, is variable and highly precisely moved for the introduction by means of a device and in such a way that additive (17) is dosed exactly in relation to the volume flow of the medium and that a pulsating stream (18, 36) is injected into the medium flowing past, by means of at least one well-aimed nozzle opening (4). The additives are dosed by means of a pressure that can be variably adjusted by pulse width and pulse frequency. The desired homogenous distribution is obtained by the penetrating injection jet (37) during compounding.
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Fax copy (faxed Nov. 02, 2001) of PCT paper transmitting Search.
Report and translation of PCT paper attached. Mar. 2002.
Carella Byrne Bain et al.
Hand Francis C.
Kastler Scott
Sulzer Chemtech AG
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