FIELD: manufacture of plastic pipes by centrifugal casting with fibrous and sand fillers. SUBSTANCE: sand intermediate container 13 with capacity of 150-500 l of car 12 is communicated with bin 20 by means of hose 19 for supplying of sand from bin by compressed air. Bin and container are provided with weight pickups. The plant has counting and control instrument 30. The latter ensures engagement and disengagement of device 32 for filling bin 20 with sand upon attaining the minimum or maximum weight or volume of sand in bin. Instrument 30 interlocks operation of device 32 during supply of sand to hollow of mold 4. Instrument 30 controls speed car 12 in accordance with preset program, continuously weighs sand weight in bin and container and controls supply of sand, resin and glass fibers into mold 4. In course of pipe manufacture, container 13 is filled with sand from bin 20 continuously. Car 12 is moved at speed to prevent separation of sand into fractions of its grains in container 13. EFFECT: higher efficiency. 9 cl, 4 dwg
