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ABSTRACT
Impurity retention when casting alloys is of great concern to casters in the ongoing research into the quality of molded parts. This retention can be achieved through filtration, using various filters and implementations. There are also some newer filtration devices, such as carousels and filter boxes used in casting systems for refractory ceramics intended for large steel parts and other top-casting devices through filter sleeves.
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Read the articleAUTHOR
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Gilbert BELLANGER: Foundry engineer DPE (state-approved) and EUR-ING (European engineer) - Methods Project Manager at Centre Technique des Industries de la Fonderie (CTIF) - Professor at the École Supérieure de Fonderie et de Forge (ESFF)
INTRODUCTION
This dossier deals with the retention of impurities by filtration of sand castings. It covers the various filters available on the market and those most frequently encountered in the industry, the practical recommendations necessary for their implementation, and the calculation method we recommend for in-mold filtration etching systems.
An example of an industrial application illustrates this method.
An important chapter is devoted to filtration-related improvements in casting quality for the main alloy families, as well as to more recent filtration devices such as the carousels and filter boxes used in refractory pottery casting systems for large steel parts
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Filling molded parts with sand
Provisions for mold filtration
Bibliography
References
Standards
- European standard – norme française ; Fonderie : Contrôle de la rugosité de surface par comparateurs visotactiles ; 10 pages (February 1997) – Published and distributed by the Bureau de Normalisation des Industries de la Fonderie (BNIF) and the Association Française de Normalisation (AFNOR). – marketed by ETIF. - NF EN 1370 : -
- European standard – French standard; Aluminium and aluminium alloys foundry – molded parts – Chemical...
Organizations
AFNOR :Association Française de Normalisation, 11 rue Francis de Préssensé – 93571 – La Plaine Saint Denis Cedex Telephone: 01.41.62.80.00 – fax: 01.49.17.90.00. http://www.afnor.fr
ATF :Association Technique de Fonderie, Maison de la Mécanique, 45 rue Louis Blanc – 92400. Courbevoie. Postal address: 92038 Paris-la Défense Cedex – Telephone:...
Filter suppliers
(non-exhaustive list)
ASHLAND AVEBENE. 20 rue croix du Vallot – 27600 – St Pierre la Garenne – Téléphone : 02.32.52.50.27 – télécopie : 02.32.52.82.11. http://www.ashland.com
BREFOND. 16 Allée Romain Rolland – ZA de la haute borne – 93390 – Clichy sous bois – Téléphone : 01.43.32.59.36 – télécopie : 01.43.32.61.98...
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