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AssigneePeak Deutschland GmbH
InventorsHartmut Polzin, Theo Kooyers, Matthias Strehle, Frank Gleissner
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The invention relates to a method for producing lost cores or molded parts for the production of cast parts, in which a basic molding material is mixed with an alkali silicate or water glass binder and a lost core or a molded part for the production of cast parts is formed using a core shooter in a core box, wherein the alkali silicate or water glass binder contains an alkali silicate or water glass solution having a modulus of 1.5 to 3.5 and natural and/or synthetic additives in a proportion of 0.1 to 25% by weight measured with respect to the total amount of binder, with a particle size of less than 5 μm and the natural and/or synthetic additives are at least aluminum silicate, magnesium silicate and sodium aluminum silicate, each having a proportion of 1 to 5% by weight measured with respect to the total amount of binder. The lost core or the other molded part is formed in an unheated core box, and the lost core thus formed or the molded part is cured using hot air.
A method for producing lost cores or moulded parts for the production of cast parts, in which a basic moulding material is mixed with an alkali silicate or water glass binder and each lost core or a moulded part for the production of cast parts is formed using a core shooter in a core box, characterized in that the alkali silicate or water glass binder contains an alkali silicate or water glass solution with a modulus of 1.5 to 3.5 and natural and/or synthetic additives in a proportion of 0.1% to 25% by weight with respect to a total quantity of the binder, with a particle size of less than 5 μm and wherein the natural and/or synthetic additives are at least aluminium silicate, magnesium silicate and sodium aluminium silicate, each in a proportion of 1% to 5% by weight with respect to the total quantity of binder, in that the lost core or the other moulded part is moulded in an unheated core box, and in that the lost core or the moulded part which is moulded in this manner is hardened using hot air.
An alkali or water glass binder for binding a basic moulding material for lost cores or moulded parts for casting moulds for the purposes of cast part production, containing an alkali silicate or water glass solution with a modulus of 1.5 to 3.5 and natural and/or synthetic additives in a proportion of 0.1% to 25% by weight with respect to a total quantity of the binder, with a grain size of less than 5 μm, wherein the natural and/or synthetic additives are at least aluminum silicate, magnesium silicate and sodium aluminium silicate, respectively in an amount of up to 1% to 5% by weight with respect to the total quantity of the binder.
Dependencies are inferred from the claim text.