Fremgangsmåte for kontinuerlig fremstilling, uten lösemidler, av pyrotekniske produkter

Continuous process for the manufacture of thermoformable composite pyrotechnic products comprising at least one thermoplastic or quasi-thermoplastic binder and an organic or inorganic crystalline oxidizing charge, which are mixed and homogenized on a roll mill consisting of two cylindrical rollers of identical length, with parallel axes situated in the same horizontal plane, the rollers turning in opposite directions to each other with different speeds of rotation and their axes being separated from each other so as to allow a minimum separation to exist between the external surfaces of the two rollers in the plane containing the two axes. The binder is introduced continuously into a feed zone situated at one of the ends of the said rollers, in a pre-formulated solid form containing all the constituents of the binder and being free from solvent so that the binder forms a continuous sheet which covers the faster turning roller. The product is withdrawn continuously into a recovery zone situated at the end of the rollers opposite to that where introduction of the binder takes place, the said oxidizing charge is introduced continuously in the form of crystals in a zone situated between the binder feed zone and the recovery zone of the pyrotechnic product and arranged above the roller covered with the binder, the size of the crystals constituting the oxidizing charge being at most equal to the minimum separation existing between the external surfaces of the two rollers. Apparatus for carrying out the process is also disclosed.