Abstract The invention relates to a process for realizing the running-in of a fluid comprising at least an explosible component sensitive to shocks and/or rubbing. The process of the invention consists in filling the moulds 2 with a specified quantity of casting powder P, in running-in a casting solvent S into the moulds 2 placed under reduced pressure, and in then curing the blocks thus cast to gel the casting powder. The running-in of the casting solvent S into the mould 2 from the storage tank 3, and the beginning and the end of this running-in of the casting solvent are controlled by controlling the pressure difference existing between the pressure prevailing in the storage tank and that prevailing in the mould 2. Thus, it is possible to control the running-in of the casting solvent into the moulds remotely. The present invention applies especially in the industry for the manufacture of solid propellant compositions.
Plant for the manufacture of a block of propellant by the casting method, comprising at least one mold, at least one storage tank for the casting solvent connected to said mold, a source of compressed gas, and a source of vacuum, wherein said storage tank for said casting solvent and said mold both are connected to said source of vaccum and to said source of compressed gas, and wherein said mold is connected to said source of vacuum by means of a float valve situated in the upper part of said mold.
Claim 2
Dependent Claim
92 words
Plant for the manufacture of a block of propellant by the casting method, comprising at least one mold, at least one storage tank for the casting solvent connected to said mold, a source of compressed gas, and a source of vacuum, wherein said storage tank for said casting solvent and said mold both are connected to said source of vaccum and to said source of compressed gas, and wherein said mold is connected to said source of vacuum by means of a float valve situated in the upper part of said mold.
Claim 3
Dependent Claim
23 words
Plant according to claim 1, characterized in that the abovementioned mould is connected to the source of compressed gas through a calibrated orifice.
Claim 4
Dependent Claim
46 words
Plant according to claim 1, characterized in that the abovementioned float valve comprises a shutter float arranged so that it can move in a cage fixed to the end of a conduit, the other end of the said conduit being connected to the source of vacuum.
Claim 5
Dependent Claim
24 words
Plant according to claim 1, characterized in that a nonreturn valve is provided in each conduit for supplying casting solvent into the abovementioned mould.