2results about How to "Improve compromise" patented technology

Structure (10) comprising at least one device (1) connectable to at least one wall (11) of the structure (10), comprising a first and a second metal profiles (2, 3), the first metal profile (2) defining in section at least one first closed chamber (4), the second metal profile (3) defining in section at least one second closed chamber (5) comprising a polymer insulating element (7) which is interposed between the first metal profile (2) and the second metal profile (3), said first metal profile (2), said polymer insulating element (7) and said second metal profile (3) being arranged in series, so as to prevent the contact between the first metal profile (2) and the second metal profile (3) characterized in that said structure (10) defines at least one inner space and one outer space of the structure (10), wherein said first metal profile (2) faces the outer space and said second metal profile (3) faces the inner space and in that said second metal profile (3) comprises two or more chambers (5, 6), wherein said second metal profile (3) is a single element forming in section said two or more chambers (5, 6), wherein said second metal profile (3) is covered by a polymer cover (8) that faces the inner space.

This invention relates to the field of precision casting of high-temperature alloy blades, and particularly to the field of preparing precision casting mold shells for aircraft single-crystal blades. The invention involves mixing different types of fused mullite powder and corundum powder with silica sol of varying specifications to form a slurry, which is then combined with corundum sand or fused mullite sand of different mesh sizes to prepare the mold shell. After dewaxing and calcination, the mold shell is obtained for preparing single-crystal turbine blades. The single-crystal blade mold shell prepared by this invention can effectively prevent recrystallization on the blade surface, reduce the blade recrystallization scrap rate, and save production costs.