An apparatus comprising a press mould (4) with a container (5) having a cavity (6) for a powdery mixture, a device (7) for initiating the combustion of mixture in the cavity (6) of the container (5), a ram (10) for deforming combustion products in the cavity (6) of the container (5) and a press (1) building up a pressure for deforming the combustion products, said press comprising a slide (2) linked kinematically with the ram (10) and provided with a system (3) controlling movement of the slide and wherein the container (6) is made up of vertical segments (12) with spaces (13) therebetween for discharge of gases from the apparatus and comprises a die (14) with an orifice (15) and has a conical entry portion (16) conjugated with the orifice (15) of the die (14) and with the cavity (6) of the container (5) and has a heat-insulated sizing member (17) for imparting a form to a product, the cross section of said sizing member (17) corresponding to a shape of the orifice (15) of the die (14), the system (3) controlling the movement of the slide (2) comprises a unit (21) for controlling temperature conditions of extrusion, said unit comprising a temperature sensor (22) installed on a surface of said conical entry portion (16) of the die (14) and a member (23) of said unit electrically coupled with the sensor (22) and the press (1) and sending a command for moving the ram (10).