The invention relates to molding material mixtures containing a molding base material, water glass, amorphous silicon dioxide and an oxidic boron compound, and the production of molds and cores, in particular for metal casting.

The invention relates to molding material mixtures containing a molding base material, water glass, amorphous silicon dioxide and an oxidic boron compound, and the production of molds and cores, in particular for metal casting.

A method to manufacture reticulated metal foam via a dual investment solid mold, includes pre-investment of a precursor with a diluted pre-investment ceramic plaster then investing the encapsulated precursor with a ceramic plaster.

A method to manufacture reticulated metal foam via a dual investment solid mold, includes pre-investment of a precursor with a diluted pre-investment ceramic plaster then investing the encapsulated precursor with a ceramic plaster.

The disclosure relates generally to mold compositions and methods of molding and the articles so molded. More specifically, the disclosure relates to mold compositions, intrinsic facecoat compositions, and methods for casting titanium-containing articles, and the titanium-containing articles so molded.

The disclosure relates generally to mold compositions and methods of molding and the articles so molded. More specifically, the disclosure relates to mold compositions, intrinsic facecoat compositions, and methods for casting titanium-containing articles, and the titanium-containing articles so molded.

The present invention concerns a process for the production of cores of silica for aeronautical and industrial turbine components, comprising the following steps: manufacturing of a metal mother mold; manufacturing of a plaster mold by means of casting in the mother mold of a mixture of water and plaster and subsequent drying; casting in a cavity of said plaster mold of a mixture of silica and water; resting of the mixture of silica inside the plaster mold, with water absorption by the mold and solidification of a core of silica; extracting of the core of silica from the mold and air drying at a temperature not exceeding 50 C.; sintering of the core of silica; finishing and dimensional inspecting of the core. The invention additionally concerns a core for aeronautical and industrial turbine components characterised by the fact of being constituted of silica, i.e. totally free from alumina and/or zirconium silicates.

The present invention concerns a process for the production of cores of silica for aeronautical and industrial turbine components, comprising the following steps: manufacturing of a metal mother mold; manufacturing of a plaster mold by means of casting in the mother mold of a mixture of water and plaster and subsequent drying; casting in a cavity of said plaster mold of a mixture of silica and water; resting of the mixture of silica inside the plaster mold, with water absorption by the mold and solidification of a core of silica; extracting of the core of silica from the mold and air drying at a temperature not exceeding 50 C.; sintering of the core of silica; finishing and dimensional inspecting of the core. The invention additionally concerns a core for aeronautical and industrial turbine components characterised by the fact of being constituted of silica, i.e. totally free from alumina and/or zirconium silicates.

Congruent melting salt alloys for use as salt cores in high pressure die casting of metallic alloys for the production of complex metallic parts. Congruent melting salt alloys provide mechanical advantages in the high pressure die casting of both aluminum and magnesium alloys. Salt cores may be used to make complex high pressure die casting parts such as internal passages in a closed deck engine block. The congruently melting salt alloy is cast into a shape of a desired salt core. The cast salt core of the congruently melting slat alloy is placed into a high pressure die casting mold for a complex object. Molten metal is introduced into the high pressure die casting mold to form the complex part. The congruently melting salt alloys may be readily removed from the final cast part through flushing with a solvent, such as water, or through other processes known in the art.