METHOD FOR MANUFACTURING COMPOSITE LIGHTWEIGHT FILLER BASED ON SYNTACTIC FOAM AND CERAMIC MACROSPHERES Russian patent published in 2023 - IPC B29C65/48 B29C65/56 B63B1/02 B63B3/13 

FIELD: syntactic foam production.

SUBSTANCE: buoyancy blocks of deep-sea technology, which is a lightweight composite filler made on the basis of syntactic foam and ceramic macrospheres with a relatively low specific gravity, significantly less than the density of water. A method for manufacturing a composite lightweight filler based on syntactic foam and ceramic macrospheres for buoyancy elements is described, including modules filled with macrospheres with a protective coating and interconnected, while the shapes of the modules, consisting of two plates of equal thickness, made of high-strength syntactic foam by pouring its uncured composition into a process form with subsequent mechanical refinement. Each of the two plates of the module form has hemispherical cavities, in the poles of which there are conical holes, macrospheres with a protective coating are installed in one of the plates of the module form, while the gap between the hemispherical cavity and the macrosphere is set by centring the macrospheres with the help of gaskets made of high-strength syntactic foam, the gap size to ensure free filling of all cavities of the composite lightweight filler with water when immersed in water is 2 mm, and to ensure the composite lightweight filler is waterproof, the gap is 4 mm, as well as when connecting the plates of the module form and when interconnecting the modules, the adhesive composition made on the basis of the same components as high-strength syntactic foam is used. The module shape of the composite lightweight filler consists of two plates of equal thickness and is made of high-strength syntactic foam having low density, high hydrostatic compressive strength and waterproofness in sea and fresh water, which is used in deep-sea equipment buoyancy systems and has a density of 550 to 670 kg/m³ for diving depths from 6000 to 11000 m.

EFFECT: reduction of the density of the buoyancy elements and, consequently, increasing its lifting force, while meeting the specified requirements for strength and reliability, which leads to a decrease in the displacement of an underwater object, an increase in its autonomy and/or speed.

3 cl, 4 dwg