	US 12,337,376 B2
	Method for producing an article for use in the foundry industry, corresponding mold, core, feed element, or molding material mixture, and devices and uses
Azghar Munshi, Castelgomberto (IT); René Vargovic, Wunstorf (DE); Lukas Mirko Reinold, Hannover (DE); and Maria Schweinefuss, Hannover (DE)
Assigned to HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG, Düsseldorf (DE)
Appl. No. 18/005,411
Filed by HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung, Düsseldorf (DE)
PCT Filed Jul. 12, 2021, PCT No. PCT/EP2021/069276 § 371(c)(1), (2) Date Jan. 13, 2023, PCT Pub. No. WO2022/013129, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 102020119013.1 (DE), filed on Jul. 17, 2020.
Prior Publication US 2023/0271245 A1, Aug. 31, 2023
Int. Cl. B22C 1/18 (2006.01); B22C 11/00 (2006.01)

CPC B22C 1/181 (2013.01) [B22C 11/00 (2013.01)]

11 Claims

1. A process for producing an article for use in the foundry industry, selected from the group consisting of molds, cores, feeder elements and molding material mixtures, said process comprising the following steps:

(S1) producing or providing a binder system comprising the following components in three spatially separate vessels:

a component (A) comprising particulate amorphous silicon dioxide,

a first liquid component (B) comprising waterglass,

and

a second liquid component (C) comprising aluminate ions dissolved in an aqueous phase,

(S2) contacting a mold base material (D) and constituents of all the said components (A), (B) and (C) of the binder system in predetermined ratios in one or more steps, so as to result in a molding material mixture in which the aluminate ions and the particulate amorphous silicon dioxide are mixed into the waterglass, wherein steps (S1) and (S2) are conducted in a facility for producing molding material mixtures.