EP 3586995 B1 20210414 - METHOD FOR PREPARING A FOUNDRY SAND MIXTURE
Title (en)
METHOD FOR PREPARING A FOUNDRY SAND MIXTURE
Title (de)
VERFAHREN ZUR AUFBEREITUNG EINER GIESSEREISANDMISCHUNG
Title (fr)
PROCÉDÉ DE PRÉPARATION D'UN MÉLANGE DE SABLE DE FONDERIE
Publication
Application
Priority
EP 18180868 A 20180629
Abstract (en)
[origin: WO2020003277A1] The invention relates to a method for the cost-effective, resource-saving and highly-productive recovery of moulding sand (F) from a foundry sand mixture (G) containing at least a portion (FAB) of fragments or loose particles of moulding material produced during the demoulding of a cast part from a casting mould as a result of the destruction of mould cores or mould parts forming the cast part, which have been formed from the moulding sand (F) and an inorganic binder and optionally at least one additive for controlling the properties of the moulding material, wherein the method comprises the working steps of a) mixing the foundry sand mixture (G) with cleaning water (RW) to form a slurry (S) in order to remove the inorganic binder residues (AB) contained in the foundry sand mixture (G) and optionally present additives from the moulding sand (F) and to wash them out of the foundry sand mixture (G), and b) separating the cleaning water (RWK) contaminated with the inorganic binder residues (AB) from the moulding sand (F) contained in the slurry (S), and wherein the process temperature of the slurry (S) formed from the cleaning water and the foundry sand mixture (G) (working step a)) is between 50 and 200°C.
IPC 8 full level
B22C 5/04 (2006.01); B22C 5/10 (2006.01); B22C 5/18 (2006.01)
CPC (source: EP KR US)
B22C 5/0409 (2013.01 - EP KR); B22C 5/0463 (2013.01 - US); B22C 5/0472 (2013.01 - US); B22C 5/10 (2013.01 - EP KR US); B22C 5/185 (2013.01 - EP KR US)
Citation (opposition)
Opponent : DEANTEC GmbH
- DE 102005041519 A1 20070301 - KLEIN ANLAGENBAU AG [DE]
- JP 2002178100 A 20020625 - UNIV TOYOHASHI TECH, et al
- WO 2007082747 A1 20070726 - HOS HOTTINGER SYSTEMS GBR [DE], et al
- DE 4109167 A1 19910926 - KUETTNER GMBH & CO KG DR [DE]
- WO 8503462 A1 19850815 - LOREK H G GIESSEREI TECH VDG [CH]
- CN 103056291 A 20130424 - QINGDAO SANHESHAN CASTING GROUP CO LTD
- CN 104759584 A 20150708 - JUZHOU GROUP CO LTD
- DE 102012011384 A1 20131212 - DEANTEC GMBH [DE]
- F. F. BOWNES ET AL.: "The SCRATA Wet Reclamation Process for Sodium Silicate Bonded Sands", PROCEEDINGS OF 1984 ANNUAL CONFERENCE, 20 June 1984 (1984-06-20), Nottigham, pages 1 - 7, XP055911301
- BAUMBACH R.: "Erarbeitung einer umweltverfahrenstechnischen Konzeption zur Naß- Reinigung von Gießereialtsanden des sogenannten Wasserglas-Verfahrens", DIPLOMARBEIT, WOLFSBURG, 16 September 2002 (2002-09-16), Wolfsburg, XP055911303, [retrieved on 20220411]
- ANONYMOUS: "Sinnerscher Kreis", WIKIPEDIA, 20 June 2020 (2020-06-20), XP055911313, Retrieved from the Internet <URL:https://de.wikipedia.org/wiki/Sinnerscher_Kreis>
- ULRICH RUST: "Der Sinner'sche Kreis. Basis einer erfolgreichen Reinigung und Desinfektion", GETRÄNKEINDUSTRIE, November 2004 (2004-11-01), pages 98 - 104, XP055911324
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3586995 A1 20200101; EP 3586995 B1 20210414; EP 3586995 B2 20240424; BR 112020026856 A2 20210406; BR 112020026856 B1 20240312; CN 112512723 A 20210316; ES 2874204 T3 20211104; ES 2874204 T5 20241007; HU E054926 T2 20211028; JP 2021529667 A 20211104; KR 20210010908 A 20210128; MX 2020014218 A 20210527; PL 3586995 T3 20211025; PL 3586995 T5 20240617; US 11707777 B2 20230725; US 2021260647 A1 20210826; WO 2020003277 A1 20200102
DOCDB simple family (application)
EP 18180868 A 20180629; BR 112020026856 A 20190701; CN 201980043992 A 20190701; ES 18180868 T 20180629; HU E18180868 A 20180629; IB 2019055584 W 20190701; JP 2020572871 A 20190701; KR 20207036136 A 20190701; MX 2020014218 A 20190701; PL 18180868 T 20180629; US 201917256280 A 20190701