FIELD: molding of building block with groove-and-tongue beds and three-dimensional pattern on face surface. SUBSTANCE: mold has base, side components and separating partitions with members forming hollows and protrusions. Separating partitions are made of polymer material with low adhesion to concrete, for instance, of shock-resistant polystyrene. Each partition is designed separately for each side of each pair of adjacent blocks. Vertical ribs of partitions are provided with alternating grooves and tongues entering, in assembly, respective tongues and grooves of adjacent partitions and relating to each other in rib length as 1:3. Partitions designed for formation of beds of building blocks have groove-and-tongue forming members located normally to the base. Mounted rigidly on partition on the side of groove-forming members is hole forming core. Partition surface forming one of block beds has matrix three-dimensional pattern, and the other surface of this partition has matrix protrusions for forming channel for electric wiring and socket for electric accessories located at distance of 1/4 of bed length from block end parallel to bottom plate. Besides, installed on base are removable bottom plate, whose face surface has matrix three-dimensional pattern identical to pattern on partition forming block bed. EFFECT: higher efficiency. 5 cl, 4 dwg
