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Mischen in Schneckenmaschinen, Teil 1: Homogenisieren
Author(s) -
Pahl Manfred H.
Publication year - 1985
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.330570507
Subject(s) - mixing (physics) , homogenization (climate) , materials science , thermoplastic , chemical engineering , composite material , engineering , ecology , physics , biodiversity , quantum mechanics , biology
Mixing in screw mixers, Part 1: Homogenization . During the treatment of thermoplastic synthetic materials in screw mixers the powder or granular material has to be melted as well degassed, mixed, and delivered against higher pressure. The mixing operations are: Mixing of soluble liquids, suspending of solids in liquids, deagglomeration, mixing of immiscible liquids and mixing of particulate solids. The efficiency of mixing of soluble liquids is poor in conventional single‐screw extruders under low pressure. Additional mixing elements are therefore placed on the screw. The distribution of the components is better in co‐kneaders and multistage screw mixers than in conventional single‐screw mixers. Co‐rotating screws which mesh together show a more careful treatment and more steady mixing of soluble liquids than contrarotating screws. The manufacturers of such continuously working machines are venturing increasingly into the area of reaction technology with treatment of highly viscous materials. A new development is the new programmable reactor.