Huttenes-albertus Chemische Werke Gesellschaft MIT Beschrankter Haftung

Huttenes-albertus Chemische Werke Gmbh

Chemex Gmbh

Huettenes-albertus Chemische Werke Gmbh

Chemex Foundry Solutions Gmbh

Nicolas Egeler

Xin Li

Robert A Laitar

Marek A Torbus

Christian Lustig

Michael Biemel

Gérard Ladégourdie

Heiko Schirmer

Maria Schweinefuß

Milan Knezevic

Wolfgang Seelbach

Douglas M Trinowski

Mirko Reinold

Gee Ho Bae

Described is a method of preparing a particulate refractory composition for use in the manufacture of foundry moulds and cores from spent foundry moulds or cores formed of refractory material and a binder containing water glass, the method comprising the following steps: providing broken material from spent foundry moulds or cores or preparing broken material from spent foundry moulds or cores, wherein the broken material comprises particles and/or aggregates of particles of refractory material having hardened water glass binder on their surface, mixing the broken material with particulate amorphous oxide comprising silicon dioxide in an amount of 85% by weight or more, based on the total amount of the particulate amorphous oxide, to give a mixture and subjecting the mixture to a heat treatment at a temperature of 400&#xb0; C. or higher. Also described are a corresponding use, a reclamation mixture, and a method of making a foundry mould or core.

Method of preparing a particulate refractory composition for use in the manufacture of foundry moulds and cores, corresponding uses, and reclamation mixture for thermal treatment

An arrangement for use in the production of a separable casting mold, preferably of a vertically separable casting mold is disclosed. The arrangement can include (i) a mold plate and/or a mold pattern, (ii) a feeder system having a feeder element and having a feeder insert, wherein feeder element and feeder insert delimit a feeder cavity for receiving liquid metal. The arrangement also includes one or more tipping prevention elements which are designed to counteract tipping of the feeder system out of the opening axis about the first end of the feeder element when, in the event of the feeder system being acted on with a force acting parallel to the opening axis and in the direction of the first end, the side wall deforms and the spacing between the first and second ends is reduced, wherein the one or more tipping prevention element(s) are/is spaced apart from the opening axis.

Arrangement for use in the production of a separable casting mould

This invention relates to a resin preparable by reaction of a phenol/formaldehyde novolak with tetraethyl orthosilicate in a mass ratio above 28:1, wherein the phenol of the phenol/formaldehyde novolak is substituted or unsubstituted hydroxybenzene or a mixture of two or more such phenols, and to a particulate material coated with said resin. Said particles can be used e.g. in the shell molding process for the production of shell molds and shell cores; and as proppants for use in the hydraulic fracturing process.

Silicic ester modified phenol/formaldehyde novolaks and their use for the production of resin coated substrates

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Krefeld, Germany

Nicolas Egeler