EP 0597335 B1 19970723 - Process and apparatus for renerating used foundry sand
Title (en)
Process and apparatus for renerating used foundry sand
Title (de)
Verfahren und Vorrichtung zum Regenerieren von Giessereialtsand
Title (fr)
Procédé et appareil pour la régéneration de sable de fonderie usagé
Publication
Application
Priority
DE 4237838 A 19921110
Abstract (en)
[origin: EP0597335A1] Used foundry sand is cleaned by a process in which it is circulated in a processing chamber and frictional forces which break open the binder shell and separate it from the sand grain are exerted on the particles of used sand and the mixture of substances formed is cleaned physically, thereby increasing the proportion of sand. In order to allow effective cleaning, part of the mixture of substances is removed from the processing chamber after passing through the friction zone and passed into a separate cleaning chamber, where it is cleaned, after which the precleaned used sand is returned to the processing chamber. <IMAGE>
IPC 1-7
IPC 8 full level
B22C 5/04 (2006.01); B22C 5/10 (2006.01); B22C 5/18 (2006.01)
CPC (source: EP)
Designated contracting state (EPC)
CH DE ES FR GB IT LI NL
DOCDB simple family (publication)
DE 4237838 A1 19940511; DE 59306964 D1 19970828; EP 0597335 A1 19940518; EP 0597335 B1 19970723
DOCDB simple family (application)
DE 4237838 A 19921110; DE 59306964 T 19931029; EP 93117552 A 19931029