Aktiebolaget Bofors

Bae Systems Bofors Ab

Lars-Erik Bjorn

Mats Olsson

Lennart Gustavsson

Ulf Melhus

Dennis Taylor

Olof Man

Nils-Gunnar Bjorkqvist

The present invention proposes a novel method for producing powder charges with a high charge density consisting of a granulated powder lying loosely in the charge. In accordance with the invention, the powder is vacuum-packed in airtight pouches made of a combustible and preferably flexible packaging material.

Method for producing propellant charges from a granulated propellant, preferably granulated powder, and propellant charges produced in accordance with the aforementioned method

The present invention relates to a method and an apparatus for production of cartridged propellant charges for barrel weapons with charge weights up to 1.4 kg/liter. According to the invention, more granular or particle-shaped propellant powder is driven down or compacted than can be housed in free-running condition within the same volume by means of a piston or plunger (6) in a single stage down into a case (4) the inside of which is coated with a friction-reducing coating. The piston or plunger (6) can then be provided with an elastically deformable leading part (7) of e.g. rubber and/or with a conically tipped leading end (7a). According to one variant of the invention the powder is pressed down into a bag (12, 13) of combustible fibre material which has been inserted in advance down into the case (4) coated internally with a friction-reducing coating or which has itself been impregnated with a friction-reducing coating. The invention also enables the powder to be compacted to advantage at a temperature that is higher than the room temperature.

Method and apparatus for production of cartridged propellant charges for

A method of producing pressed rocket propellant with good flash suppression and a high burning velocity, i.e. containing optimal quantities of flash reducing agent and catalysts. The meethod is characterized by the entire quantity of flash reducing agent required in order to achieve the result desired being mixed into a separate quantity of propellant while the entire quantity of catalysts required in order to achieve the result desired is mixed into the remaining quantity of propellant, after which these propellants containing either flash reducing agent or catalysts are converted into an appropriate form and mixed in layers or in its entirety and thereafter pressed into the form desired. In the body of propellant obtained, the flash reducing agent and catalysts will be separated, and will not interfere with each other's function.

Method of producing a flash suppressed pressed rocket propellant

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Karlskoga, Sweden

Lars-Erik Bjorn