Societe Nationale Des Poudres Et Explosifs

Francois Gendreau

Michel B Maures

Thierry Bonnabaud

The invention relates to the field of combustible ammunition and relates chiefly to the manufacture of bottoms or covers for combustible cases. According to the invention, a combustible article is manufactured by pressing in a die 10 at least one sheet 21 of combustible paper containing nitrocellulose and having the shape of a disc, by virtue of a rigid movable punch 20 exerting a compressive force on a deformable flexible punch 22 arranged inside the said die 10 between the sheets 21 and the said movable punch 20. The flexible punch 22 is in the shape of a substantially cylindrical thick disc, consists of neoprene or a silicone resin and has a hardness of between 55 and 65 Shore at 20.degree. C. The pressing operation is accompanied by a thermoforming operation carried out at approximately 115.degree. C. The process is particularly suitable for the production of bottoms of combustible cases bearing studs or grooves on their side faces.

Growing community of inventors

Velines, France

Francois Gendreau