Filter apparatus for the uniform filtration of plastic melts

Details Filter apparatus for the uniform filtration of plastic melts Filter apparatus for the uniform filtration of plastic melts

1987-05-18

1989-07-18

Fisher, Richard V.

Liquid purification or separation

Plural distinct separators

Filters

210340, 210346, 210486, 21049701, 425199, B01D 2924

Patent

active

048491039

ABSTRACT:
A filter apparatus is provided comprising a number of cylindrical candle filters, each of which contains a displacement body forming a space of uniform width between itself and the candle filter. The filter material of the candle filter is supported by a cylindrical supporting body which has passages through which a plastic melt to be filtered can flow. A number of filter apparatuses can be arranged on concentric circles on a cylindrical filter housing so as to minimize the dwelling time of the plastic melt flow through the filters and to minimize the pressure loss over the length of the filters.

REFERENCES:
patent: 2789699 (1957-04-01), Piston
patent: 3458047 (1969-07-01), White
patent: 3503516 (1970-03-01), Harms et al.
patent: 3598243 (1971-08-01), Guthoniski
patent: 4146485 (1979-03-01), Broad
patent: 4267039 (1981-05-01), Ryan
patent: 4526688 (1985-07-01), Schmidt et al.
patent: 4613438 (1986-09-01), De Graffenreid
Kunststoff, 70, (Plastics, 70), 1980, No. II, pp. 753-758, by F. Hensen and H. Simetzki.
Filtrieren von Kunststoffschmelzen (Filtration of Plastic Melts), VDI Verlag GmbH, 1981, pp. 20-21, Kunststofftechnik.
Plastverarbeiter, 33, Jahrgang 1982, No. 12, pp. 1447-1454, (Einsatz von Frossflachenfiltern und dynamischen Mischern zur Qualitatsverbesserung.
"SPE-Antec", 38, 1980, pp. 92-95, R. R. Kraybill, Flow Equations for High Viscosity Polymer Melts in Cylindrical Cartridge Filters.
"Mechanische Verfahrenstechnik", (Mechanical Process Engineering) by R. Rautenbach, RWTH Aachen., SS 1978, pp. 112-128.

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