FIELD: construction; may be used in manufacture of building articles intended for erection of wall energy-saving guards of structures of residential, public and industrial buildings. SUBSTANCE: mold is joined with vacuum plant by pipe union and provided with compound hollow-forming cores with porous walls. Hollow-forming core is located in the mold middle part and connected with vacuum plant. Hollow-forming core is made with at least two through channels which are coaxial to through channels of article middle layer. Molded in mold by vacuum treatment may be voluminous hollow wall blocks having external high-quality finishing layer of complete factory availability for service connected with one another by means of keys from light-weight concrete and internal heat-insulating layer having hollow filled after wall erection from blocks of placed dry with light-weight or heavy-weight concrete joining erected wall structure and being a wall component. EFFECT: higher production process potentialities. 3 cl, 3 dwg
