The present invention relates to a method and a device for producing
perforated propellant in the geometric form of block, stick, slab,
cylindrical or tubular propellant (2) with high charge density and high
progressivity. The propellant as claimed in the present invention is
characterised by a large number of perforations, densely and evenly
distributed over the entire propellant segments, made by perforation
members (6) that are pressed down into the propellant. The perforations
are thereby made in a plurality of steps with a predetermined step feed
between each perforation operation. The device as claimed in the present
invention also comprises a mobile pin die (5) away from but facing the
feed path (1) for the propellant (2), and containing at least on one row
of pins for perforation of the propellant whereby each such row of pins
comprises the number of pins (6) required to cover the complete width of
the propellant segment across its direction of advance. Between each
perforation operation the propellant is step fed by a step feed device
(15) a distance equivalent to the distance between two desired
perforations multiplied by the number of rows of pins arranged across the
direction of advance of the propellant. Additionally, in the propellant
as claimed in the present invention the distance between two burning
surfaces of the propellant shall be equal to double the desired burning
length (2b).