Abstract: A binding agent system based on water glass is disclosed, comprising an aqueous alkali silicate solution having the general composition: xSiO2·yM2O ·zH2O, with M standing for the alkali ions Li+, K+, or Na+, and a hygroscopic base, which is added in the ratio 1:4 to 1:6, with the modulus Na2O/SiO2 being equal to 2.5 to 3.5 at a proportion of solids of 20 to 40% and with 30% sodium hydroxide in an aqueous solution being used as the hygroscopic base. According to the present invention, the aqueous alkali silicate solution contains an emulsion solution having 8 to 10% silicone oil in relation to the quantity of binder, with the silicone oil having a boiling point?250°. The quantity of binder for a core sand mixture is 1.0 to 2.5%, in relation to the total quantity of granular solid, with the production method being performed in a core shooter comprising a vertically positioned housing having a horizontal air intake. The core sand mixture is introduced via a funnel into a slotted sand cylinder.

Abstract: A method for uphill casting/low-pressure casting, especially of light metal alloys, with a casting furnace lying below a casting table, having a riser pipe and a mouth opening of the riser pipe and having a mould with an underlying pouring-in opening and having a slide valve closure, forming a flow-through channel which for casting takes on a substantially straight, longitudinal course, wherein for shut-off in the slide valve closure, two opening sections of the flow-through channel directly adjacent one to the other are displaced with respect to one another transversely to the longitudinal course of the flow-through channel directly after casting with still liquid melt in the pouring-in opening, so that an overlying opening section remains in open communication with the pouring-in opening free from undercut and an underlying opening section remains in open communication with the mouth opening of the riser pipe, wherein the opening sections are completely offset with respect to each other.

Abstract: A method for uphill/low pressure casting of a liquid melt in a device which has a casting furnace lying below a casting table, a mould with an underlying pouring-in opening and a slide valve closure forming a flow-through channel having a substantially straight longitudinal course during casting the liquid melt. The casting method constitutes casting the liquid melt in the pouring-in opening of the mould, shutting off the slide valve closure by displacing an overlying opening section and an underlying opening section of the flow-through channel directly after casting the liquid melt in the mould, which liquid melt is still in the pouring-in opening. The liquid melt is lowered below the mouth opening of the riser pipe and the mould is placed on the riser pipe so that a downward pressure is set between the slide valve closure and the mouth opening of the riser pipe which behaves elastically flexibly.

Abstract: The present invention relates to a method for producing AlMn strips or sheets for producing components by soldering, wherein a precursor material is produced from a melt which contains (in weight-percent) Si: 0.3-1.2%, Fe: ≦0.5%, Cu: ≦0.1%, Mn: 1.0-1.8%, Mg: ≦0.3%, Cr+Zr: 0.05-0.4%, Zn: ≦0.1% , Ti: ≦0.1% , Sn: ≦0.15%, and unavoidable companion elements, whose individual amounts are at most 0.05% and whose sum is at most 0.15%, as well as aluminum as the remainder, wherein the precursor material is preheated at a preheating temperature of less than 520° C. over a dwell time of at most 12 hours, wherein the preheated precursor material is hot rolled into a hot strip using a final hot rolling temperature of at least 250° C., wherein the hot strip is cold rolled into a cold strip without intermediate annealing.