Extrusion installation having a monitor system suitable for detecting an anomaly, and an associated method

A method of extruding a material comprising a binder and one or more energetic fillers and using an installation comprising:

• an extruder comprising a sheath having at least one extrusion screw present therein, the extruder having at least one passive acoustic sensor fastened on the sheath;
• and
• a monitor system suitable for detecting an anomaly as a function of an acoustic signal picked up by the passive acoustic sensor, the monitor system being configured to measure variations in the amplitude of the acoustic signal picked up by the passive acoustic sensor;
• an extrusion step comprising extruding the material comprising the binder and said one or more energetic fillers through the extruder during which the acoustic signal picked up by the sensor is analyzed by the monitor system, and a continuous detection step for continuously detecting variation in the composition of the extruded material from variation in the amplitude of the acoustic signal, and comprising determining a reduction in amplitude to identify an excess of binder in the extruded material.