EP4090909A1 - Device for laying paste patterns in a tube - Google Patents
Device for laying paste patterns in a tubeInfo
- Publication number
- EP4090909A1 EP4090909A1 EP21719696.3A EP21719696A EP4090909A1 EP 4090909 A1 EP4090909 A1 EP 4090909A1 EP 21719696 A EP21719696 A EP 21719696A EP 4090909 A1 EP4090909 A1 EP 4090909A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- axis
- cartridge
- along
- patterns
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000429 assembly Methods 0.000 claims abstract description 7
- 230000000712 assembly Effects 0.000 claims abstract description 7
- 238000000151 deposition Methods 0.000 claims description 29
- 239000000446 fuel Substances 0.000 claims description 21
- 230000008021 deposition Effects 0.000 claims description 17
- 235000011837 pasties Nutrition 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 description 31
- 239000000203 mixture Substances 0.000 description 14
- 239000002904 solvent Substances 0.000 description 13
- 239000000020 Nitrocellulose Substances 0.000 description 7
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 7
- 229920002678 cellulose Polymers 0.000 description 7
- 229920001220 nitrocellulos Polymers 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 239000003380 propellant Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Inorganic materials [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- RUKISNQKOIKZGT-UHFFFAOYSA-N 2-nitrodiphenylamine Chemical compound [O-][N+](=O)C1=CC=CC=C1NC1=CC=CC=C1 RUKISNQKOIKZGT-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 235000010333 potassium nitrate Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 1
- FOHIURCGHCHRHW-UHFFFAOYSA-N 1-ethyl-3-methyl-1,3-diphenylurea Chemical compound C=1C=CC=CC=1N(CC)C(=O)N(C)C1=CC=CC=C1 FOHIURCGHCHRHW-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 241000723346 Cinnamomum camphora Species 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 239000001692 EU approved anti-caking agent Substances 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 1
- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 description 1
- 229960000846 camphor Drugs 0.000 description 1
- 229930008380 camphor Natural products 0.000 description 1
- -1 camphor) Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- WEAPVABOECTMGR-UHFFFAOYSA-N triethyl 2-acetyloxypropane-1,2,3-tricarboxylate Chemical compound CCOC(=O)CC(C(=O)OCC)(OC(C)=O)CC(=O)OCC WEAPVABOECTMGR-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/195—Manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C7/00—Non-electric detonators; Blasting caps; Primers
- C06C7/02—Manufacture; Packing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
- F42B33/02—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges
- F42B33/0207—Processes for loading or filling propulsive or explosive charges in containers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
- F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
- F42C19/0826—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition comprising an elongated perforated tube, i.e. flame tube, for the transmission of the initial energy to the propellant charge, e.g. used for artillery shells and kinetic energy penetrators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
Definitions
- the technical field of the invention is mainly that of tubes for cylindrical propellant charges having a central channel fitted to ammunition.
- the propellant charges fitted to shells and missiles are put into combustion by means of an igniter associated with an igniter tube.
- the igniter tube is formed of a fuel tube closing off an ignition charge based on bright combustion ignition powder. This igniter tube is placed in the channel of the propellant charge.
- Patent application FR-A-2 593 905 describes an ignition charge placed in a fuel tube consisting of a stack of tablets of agglomerated ignition powder. These igniter tube assemblies require on the one hand the production of agglomerated powder tablets, and on the other hand their installation in the fuel tube.
- the operation of filling the fuel tube with the ignition charge is a delicate operation, with reference both to the handling technique and to the pyrotechnic risk (the ignition powder is classified in risk division 1.1 within the meaning of within the meaning of the UN GHS classification (Globally Harmonized System of Classification and Labeling of Chemicals (UN)).
- This operation requires special tools to be automated.
- the ignition charge is introduced into the tube in mixture with a collodion to obtain (in situ) tablets, the evaporation time of the solvent from the collodion is long due to the confinement of the loaded collodion in the tube.
- Patent application FR-A-2 725 781 proposes a method making it possible to better distribute the powder charge in the channel of the munition and facilitates the dismantling of the ignition material with respect to the agglomerated powder ignition material.
- the agglomerated powder tablets are replaced by an ignition material comprising an ignition composition in powder form (typically black powder) deposited on a flexible support sheet, which is then advantageously rolled up on itself in order to be inserted into a fuel tube to form an igniter tube. So that the powder (which is just placed on the flexible support) does not fall to the bottom of the igniter tube, it is imperative to coat the powder composition with another flexible sheet (called a screen sheet), at least one of the screen and support sheets. being coated with glue.
- a screen sheet another flexible sheet
- the implementation of this process is complex due to the handling of the explosive ignition powder classified in risk division 1.1, the control of the regularity of the quantities of powders deposited in a heap on the flexible sheet and the geometries of the powders. pile, the step of covering the piles of powders deposited on the flexible sheet by the sticky screen sheet.
- the configuration possibilities of pyrotechnic objects are limited and controlled only by the mass and the spatial distribution of the piles of powdery powder.
- the present invention relates to a device for depositing pasty patterns on the surface, internal or external, of the channel of a tube.
- the device comprises a frame C supporting a first mechanical assembly A for maintaining, positioning and moving the tube, and a second mechanical assembly B for extrusion, the assemblies A and B cooperating with one another.
- the invention also relates to a method implementing the aforementioned device.
- FIG. 1 schematically represents the movement marks of the device of the invention in a fuel tube.
- Figure 2 shows schematically the assemblies A and B, the frame C, and a control module D.
- Figure 3 shows the assembly of sets A and B on frame C.
- Figure 4 shows the displacement of the fuel tube along the X axis.
- FIG. 5 shows a cartridge implemented in the device of the invention.
- FIG. 6 shows the direction of rotation of the fuel tube and the orientation of the nozzle for obtaining a circular or helical deposit.
- FIG. 7 illustrates a circular deposition of paste in a fuel tube.
- FIG. 8 illustrates a helical deposition of paste in a fuel tube.
- FIG. 9 represents the assembly A of the device of the invention.
- Figure 10 shows the elements of set A ensuring the movements in X and Y.
- FIG. 11 represents a variant of the assembly B of the device of the invention.
- FIG. 12 represents a variant of the assembly B of the device of the invention.
- FIG. 13a represents a state of the device of the invention during its implementation.
- FIG. 13b represents a state of the device of the invention during its implementation.
- FIG. 14 represents a state of the device of the invention during its implementation.
- FIG. 15 represents a state of the device of the invention during its implementation.
- FIG. 16 represents a state of the device of the invention during its implementation.
- FIG. 17 represents a state of the device of the invention during its implementation.
- Figure 18 illustrates a helical deposition of paste in a fuel tube.
- Figure 19 illustrates a helical deposition of paste in a fuel tube.
- the present invention relates, according to a first aspect, to a device for depositing pasty patterns, in particular ignition charging, on the surface, internal or external, preferably internal, of a channel of a tube, in particular a tube. combustible.
- a device for depositing pasty patterns, in particular ignition charging on the surface, internal or external, preferably internal, of a channel of a tube, in particular a tube. combustible.
- the following description takes for reference the horizontal Y axis positioned along the central axis of the tube, the X axis in a horizontal direction orthogonal to the Y axis, the Z rotation along the Y axis (tube rotation), and rotation E along the Y axis (syringe pushing screw rotation), as shown in figure 1.
- the device comprises a frame C supporting two mechanical assemblies A and B which cooperate:
- a first assembly A for maintaining, positioning and setting the tube in motion
- the first assembly A comprises two superimposed tables allowing movement along the X and Y axes, and integrates on the upper table a system for maintaining and rotating the tube along an axis of rotation Z.
- the second assembly B comprises a plate supporting a linear thrust system and a cylindrical cartridge.
- the cartridge contains the ignition charging paste to be deposited.
- the cartridge is extended at one of its ends by a bent tubular extension provided with an extrusion nozzle, and contains at its other end a sliding piston with controlled movement.
- These two sets A and B are mounted on the same frame C so that the longitudinal axis Yc of the cartridge and the axis of revolution Yt of the tube are coplanar in the plane (X, Y), as shown in figure 3 .
- the assembly A has a movable axis actuated by a stepper motor allowing to move the tube along the X axis and to align the Yt axis of the tube with the longitudinal Yc axis of the cartridge, as shown on figure 4.
- the assembly A ensures the setting in motion of the tube, on the one hand, in rotation Z around its central axis Y and, on the other hand, in translation along the Y axis.
- the two movements rotation and translation are driven separately by controlled actuators.
- These actuators are for example stepping motors controlled by software interfaces of the type of those known for 3D printers.
- the rotational and translational movements of the tube can be continuous or discontinuous in stages at constant or variable speed.
- the assembly B supports a cylindrical cartridge containing the ignition charging paste mounted on a stationary table, as shown in figure 5.
- the cartridge is oriented along the Y axis and is provided at one end, towards the tube, with d 'an elbow tubular extension terminating in an extrusion nozzle.
- the cartridge, and the nozzle are therefore not movable along the Y axis but the horizontal displacement stroke of the tube along the Y axis provided by the assembly A is sufficient for the nozzle to penetrate the tube channel over any its length.
- a piston, actuated in the body of the cartridge by a jack or an endless screw, is able to move in translation in the body of the cartridge and along the longitudinal axis Yc.
- the translational movement of the jack or of the screw is generated by a stepping motor controlled by a software interface, for example of the type used in 3D printers.
- a software interface for example of the type used in 3D printers.
- the flow of paste through the nozzle is regulated by the movement of the piston.
- the paste extruded by the nozzle settles on the surface of the tube channel to form the desired pattern (s).
- the angular orientation of the nozzle in the plane (Y, Z) is decisive for the quality of the deposit in the tube.
- This angular orientation is a function in particular of the viscosity of the paste, of the speed of rotation of the tube, of the adhesion of the paste to the tube.
- the nozzle is oriented at approximately 225 ° for a rotation of the tube in the counterclockwise direction to obtain a circular or helical deposit (the tube then also being in translational movement), as shown in FIG. 6.
- the coordination of the movements of the tube (in rotation around the Y axis and in translation along the Y axis) and of the cartridge piston along the Y axis, makes it possible to check each instant the position of the deposit in the tube channel and the quantity of paste deposited.
- This coordination is for example ensured by a computer program for controlling the motors taking into account, as input data, the characteristic quantities of the deposit (deposited mass, patterns, etc.) of the ignition charge and those of the tube (diameter, length ).
- the cartridge is temperature conditioned so as to maintain the viscosity of the paste at a value allowing its extrusion and its flowability.
- This device makes it possible to deposit pasty patterns in the tube according to various geometries, for example linear patterns in the axis of the tube, circular, helical, triangular (chevrons).
- Several patterns can be deposited successively in the channel of the tube, for example several angularly offset helical patterns or interweaving of patterns.
- the quantity of paste deposited within the same pattern can also vary according to the position in the channel by varying the speed of advance of the syringe piston and / or the speeds of rotation / translation of the tube. It is also conceivable to obtain patterns of pastes in different compositions, either by introducing into the cartridge at least two stages of different compositions, or by repeating the deposition operation with cartridges containing different compositions.
- the tube is, for example, of plastic, metallic or fibrous material.
- the tube is made of combustible fibrous material of the type of tubes for propellant charging.
- the fuel tube such as those marketed by the company Eurenco, consists of 60% to 80% by mass of cellulose ester, 17% to 37% by mass of cellulose, 3% to 7% by mass of resin and 0% to 2% by mass of stabilizing additive (the sum of these different constituents being equal to 100%). Its mass is about 15 g to 25 g.
- the fuel tube has a height of about 120 mm to 140 mm, for an internal diameter of 25 mm to 30 mm and a thickness of 1.5 to 2.5 mm.
- the fuel tube has the composition given in Table 1 and the dimensions given below. Table 1
- the mass of such a fuel tube is 18 g +/- 3g, its height is 126 mm, for an internal diameter of 28 mm and a thickness of 1.8 mm.
- the surface of the tube may be prepared, prior to depositing the paste, by sanding or by depositing a primer to promote adhesion of the paste during deposition.
- the tube installed on the device of the invention may be of a length that is multiple of that of the unit tube forming the channel of the munition, it is then, after deposition, cut into sections of length equal to that of the single tube.
- the cartridge containing the paste is for example:
- a cylindrical body provided with a piston receiving a cylindrical flexible bag of the type marketed by the company Titanobel or by the company Würth France.
- the cartridge is automatically filled with paste by a paste reservoir.
- a tubular connection between the reservoir and the cartridge then allows the cartridge to be filled when the piston is retracted, leaving the volume of the cartridge free. This avoids replacing the cartridge after using its paste content to make a new deposit.
- the deposited paste can retain its pasty appearance or solidify (for example by evaporation of a solvent (s) or crosslinking of a polymer).
- the patterns obtained after deposition are therefore either pasty or solid depending on the desired finished product. It is not excluded that part of the patterns retains their pasty appearance while another part is solidified depending on the pasta compositions deposited (by incorporating at least two different compositions in the cartridge, or by carrying out successively in at least two deposits with different compositions).
- the paste consists of a collodion charged with an ignition powder, which solidifies by evaporation of the solvent (s) after deposition to lead to solid grounds.
- the collodion is of the nitrocellulose base + solvent (s) type.
- the nitrocellulose base of the collodion consists of a cellulose ester (from about 70% to about 90% by weight) and generally contains in addition, conventionally, at least one plasticizer (about 1% to about 20%). by mass, preferably approximately 10% by mass) and at least one stabilizer for the cellulose ester (approximately 0.5% to approximately 5% by mass). It also generally contains at least one additive (> 0% to approximately 1% by mass), for example chosen from anti-adhesion agents, anti-glare agents and antioxidants. It is likely to contain a residual amount of solvent (s), in particular of phlegmatization solvent (s) or (and) of solvent (s) for dissolving the cellulose ester used during its manufacture.
- the cellulose ester used as the major component is chosen from cellulose nitrate, cellulose acetate or nitrocellulose, the latter being preferred.
- the nitrogen mass content of nitrocellulose is suitably 10.5% to 13.5%, an example being grade E nitrocellulose with a nitrogen mass content of 11.8% to 12.3%, advantageously equal to 12. %.
- the plasticizer used to prepare the collodion can be in particular a ketone (such as camphor), a vinyl ether (such as LUTONAL® A50 sold by the company BASF), a polyurethane (such as NEP-PLAST 2001 sold by the company Hagedorn-NC ), an adipate (such as dioctyl adipate) or a citrate (such as triethyl 2-acetyl citrate).
- a ketone such as camphor
- a vinyl ether such as LUTONAL® A50 sold by the company BASF
- a polyurethane such as NEP-PLAST 2001 sold by the company Hagedorn-NC
- an adipate such as dioctyl adipate
- a citrate such as triethyl 2-acetyl citrate
- the stabilizer used to prepare the collodion can in particular be a compound whose chemical formula comprises aromatic rings (suitably two aromatic rings), capable of fixing nitrogen oxides from the decomposition of nitric esters (presently nitrocellulose).
- a stabilizer mention may be made of 2-nitrodiphenylamine (2NDPA), l, 3-diethyl-l, 3-diphenyl urea (centrality I), 1,3-dimethyl-l, 3-diphenyl urea (centrality II), and 1-methyl-3-ethyl-1,3-diphenyl urea (centrality III).
- the optional additive used to prepare the collodion can in particular be chosen from non-stick agents, such as silicone-type non-stick agents, anti-stick agents. glow, antioxidants, colorants, surfactants, anti-caking agents and hydrophobic agents.
- non-stick agents such as silicone-type non-stick agents, anti-stick agents. glow, antioxidants, colorants, surfactants, anti-caking agents and hydrophobic agents.
- the solvent can be a double solvent of the acetone / butyl acetate (AB) type at 50% / 50% by mass.
- the collodion is advantageously formulated to lead to a dry extract (after evaporation of the solvent) of 10% to 40%, by mass.
- Table 2 shows a formulation of collodion at 14% solids content by mass.
- the collodion charged with ignition powder (s) comprises from about 50% to about 70% by weight of powder (s), and the balance at 100% (i.e. about 30% at about 50% by mass) of collodion.
- the ignition powder (s), previously constituted, is (are) added to the collodion.
- the ignition powder (s), previously constituted, is (are) added to the collodion.
- the powder used is preferably black powder (PN) of mass composition:
- the collodion charged with ignition powder is advantageously obtained by adding the ignition powder, previously formed, in the solvent. He was then baptized “Bénite B”. It differs from those of the prior art, designated “Benite”, obtained by separate additions in the collodion of the constituents of the ignition powder and without plasticizer.
- Table 3 gives an example of the collodion composition of Table 2, loaded with PN7 ignition powder (which is a powder of fine particle size).
- Table 3 Collodion charged with ignition powder is classified in risk division 1.4 within the meaning of the UN GHS classification. The danger zones to be taken into account for handling the charged collodion are therefore reduced, which facilitates the operations for depositing the collodion on the tube.
- the dry product ie, the ignition charge
- the dry product comprises about 88% to about 92% by mass of ignition powder (s), about 7% to about 10% by weight. mass of cellulose ester, the remainder to 100% being provided by at least one compound chosen from a plasticizer, an additive and a residual solvent.
- the dry product obtained after drying (evaporation of the solvent) of the collodion in Table 3 contains the mass ratios indicated in Table 4 below.
- the viscosity of the paste is adapted so as to allow it to be loaded by casting into the cartridge, its extrusion through the nozzle, and its non-flowing deposit on the tube.
- Any geometry and arrangement of patterns on the inner surface (channel) of the tube via the implementation of the device of the invention can be envisaged.
- the deposits are not all necessarily identical in size and / or in composition and are not all necessarily arranged regularly.
- Figures 7 and 8 show forms of ignition charges deposited in the channel of a tube.
- the device according to the invention therefore comprises two assemblies A and B, mounted on the same frame C, which cooperate, the assembly A which is suitable for maintaining and setting in controlled movements of the tube, and the assembly B which is fixed and supports a cylindrical cartridge containing the paste to be deposited.
- the motors (see below) of sets A and B are controlled by a control module D.
- Set A comprises the elements described below, shown in FIG. 9.
- a system 28 allows the positioning and the rotation of the tube 1.
- This system 28 comprises rollers 2a, 2b and 3 arranged in a triangle between which the tube is positioned 1. Rubber rings 4 are placed on the rollers 2a and 2b in order to ensure a rotational drive contact with the tube 1.
- the rollers 2a and 2b comprise at their ends a circular shoulder 5 making it possible to hold the tube 1 in position along the Y axis. They also each comprise, at their end opposite to assembly B, a toothed wheel 6a, 6b.
- the system 28 comprises a toothed wheel 7 coupled with an axis rotated via a stepping motor 8 controlled by software of the type of those fitted to 3D printers. The toothed wheel 7 cooperates with the toothed wheels 6a, 6b for the rotation of the tube 1.
- the three rollers 2a, 2b and 3 are assembled and thus fixed using brackets on the table 9a.
- the roller 3 in the upper position is provided with means making it possible to release it in order to position the tube 1 on the rollers 2a and 2b, then to fold it back into contact above the tube 1.
- the roller 3 is maintained with an articulated arm 10 connected to the table 9a.
- the table 9a is mounted on a second table 9b, the connections between these two tables and the frame C are made by means of rings, for example ball bushings (sliding on rails), for guiding, and toothed pulleys and belts for movement, this allowing movement of the table 9a along the X axis with respect to the table 9b (movement generated by the motor 11) and a movement of the table 9b along the Y axis with respect to the frame C (movement generated by the motor 12).
- the whole is controlled by software of the type used in 3D printers. This degree of freedom makes it possible to release the table 9a laterally along the X axis to facilitate the positioning and removal of the tube 1 within the three rollers 2a, 2b and 3. It also allows precise positioning of the table 9a to make coincide the Yt axis of tube 1 with the Yc axis of cartridge 19 (see below).
- the assembly B arranged vis-à-vis the assembly A, comprises the elements described below, shown in Figure 11.
- a fixed table 13 supports two rings 14a and 14b, such as ball bushings, sliding on guide rails, collinear with the Y axis, allowing the sliding of a carriage 15.
- This carriage 15 is set in motion by a endless screw 16 actuated by a stepping motor 17.
- the carriage 15 enables the piston 18 of the cartridge 19 containing the paste to be set in motion by means of a connecting rod 20.
- the table 13 is arranged on the frame C.
- the rod 20 and the piston 18 (also called a stopper in the terminology specific to syringes) form a single piece.
- the plunger of the plunger 18 of the syringe is housed in a central chamber 21, provided with a clasp, of the carriage 15.
- the clasp provides the connection in the central chamber 21 between the plunger of the plunger 18 and the carriage 15.
- a cradle 22 fixed on the table 13 maintains the body of the syringe.
- the central chamber 21 of the carriage 15 and the cradle 22 are aligned and arranged so that the axis of the syringe Yc is collinear with the axis Y.
- a tubular extension 23 terminated by a nozzle 24 is arranged at the end. syringe instead of the original syringe tip.
- the cartridge 19 when the cartridge 19 is a cylindrical body provided with a piston, the rod 20 is fixed in the center to the piston 18. At its other end, the rod 20 is held by a clasp in a central chamber 21. of the carriage 15.
- the cartridge 19 is provided at one of its ends with an angled tubular extension 23 terminating in a nozzle 24.
- Two tabs 25a and 25b are fixed vis-à-vis the table 13.
- the tab 25a comprises one bore with a counterbore and the other 25b a half-bore with a shoulder so as to accommodate the two ends of the cartridge (like a gun for a masonry cartridge).
- the invention relates to a method for depositing pasty patterns on the surface (internal or external, preferably internal) of the channel of a tube.
- a method for depositing pasty patterns on the surface (internal or external, preferably internal) of the channel of a tube is described for depositing a helical ignition charging pattern on the internal surface of a fuel tube, using as a cartridge containing the charging paste ignition, a cylindrical body cartridge fitted with a piston.
- the articulated arm 10 supporting the roller 3 is unfolded and the position of the table 9a is offset with respect to the axis Yc of the cartridge so as to facilitate the positioning of the tube 1.
- the tube 1 is placed on the rollers 2a and 2b as shown in Fig. 13a. Then the roller 3 is brought into contact with the upper part of the tube 1 as shown in FIG. 13b.
- the carriage 15 is then moved back towards the motor 17 so as to leave free the space for positioning the cartridge 19.
- the cartridge 19 containing the paste and provided with its piston 18 connected to the rod 20 is positioned on the tabs 25a and 25b. .
- the carriage 15 is advanced to secure the end of the rod 20 in the chamber 21 equipped with a clasp.
- the state of the device at this stage of implementation is shown in FIG. 14.
- the priming of the cartridge 19 allows the filling with paste of the tubular extension 23 and of the nozzle 24 by displacement of the piston 18 until as dough 26 begins to extrude from nozzle 24, as shown in Fig. 15.
- the table 9a is then moved along the X axis by actuating the motor 11 so as to align the Yt axes of the tube 1 and Yc of the cartridge 19.
- the device is then in the state shown in FIG. 16.
- the table 9b is then moved along the Y axis by means of the motor 12 so as to make the paste extrusion nozzle 24 penetrate at the initial point of deposition in the channel of the tube 1, as shown in FIG. 17 .
- the tube 1 is then rotated by means of the motor 8, and the deposition phase is then initiated by simultaneously actuating the motor 12 causing the movement of the tube 1 along the Y axis and of the motor 17 causing the advance of the piston 18 of the cartridge 19.
- the conjunction of the actions generated by each of the three motors 8, 12 and 17 leads to a helical deposition of paste 27 on the internal surface of the tube as shown in FIGS. 8, 18 and 19.
- the tables 9a and 9b are returned to their initial position and the tube is withdrawn from the device.
- the device of the invention is useful for depositing patterns of pastes inside a tube, and more particularly for obtaining ignition tubes for propellant charges. It can also be used for any application requiring the deposition of patterns in a tube, for example, in the industrial, pharmaceutical or food field.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Coating Apparatus (AREA)
- Tubes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2000429A FR3106400A1 (en) | 2020-01-17 | 2020-01-17 | DEVICE FOR PLACING PASTE PATTERNS IN A TUBE |
PCT/FR2021/050067 WO2021144539A1 (en) | 2020-01-17 | 2021-01-14 | Device for laying paste patterns in a tube |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4090909A1 true EP4090909A1 (en) | 2022-11-23 |
EP4090909B1 EP4090909B1 (en) | 2024-02-21 |
EP4090909C0 EP4090909C0 (en) | 2024-02-21 |
Family
ID=72088182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21719696.3A Active EP4090909B1 (en) | 2020-01-17 | 2021-01-14 | Device for laying paste patterns in a tube |
Country Status (7)
Country | Link |
---|---|
US (1) | US20230064872A1 (en) |
EP (1) | EP4090909B1 (en) |
KR (1) | KR20230005114A (en) |
FR (1) | FR3106400A1 (en) |
IL (1) | IL294748A (en) |
WO (1) | WO2021144539A1 (en) |
ZA (1) | ZA202208594B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3132712A1 (en) | 2022-02-15 | 2023-08-18 | Eurenco | Process for obtaining ignition pastes in an acoustic resonance mixer |
FR3139818A1 (en) * | 2022-09-21 | 2024-03-22 | Eurenco | Combustible charges adhering to the internal wall of a combustible structure containing a propellant charge |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3182595A (en) * | 1962-07-20 | 1965-05-11 | Harry F Hassmann | Igniter assembly containing strands of benite |
US3453163A (en) * | 1967-10-10 | 1969-07-01 | Stone Straw Corp | Method of making helically wound bodies having plastic material extruded on their inner walls |
FR2593905B1 (en) | 1986-02-03 | 1990-05-25 | France Etat Armement | DESTRUCTIBLE IGNITER FOR PROPELLANT CHARGES |
DE3740986A1 (en) * | 1987-12-03 | 1988-06-30 | Bongers Hermann | Propellent charge detonator having a variable ignition characteristic |
FR2725781B1 (en) | 1994-10-18 | 1997-01-24 | Giat Ind Sa | IGNITION MATERIAL FOR PROPELLANT CHARGE AND IGNITION SYSTEM OR IGNITION TUBE USING SUCH MATERIAL |
FR2737002B1 (en) * | 1995-07-20 | 1997-08-29 | Giat Ind Sa | SYSTEM FOR IGNITING A PROPELLANT CHARGE, IN PARTICULAR FOR CAMPAIGN ARTILLERY AMMUNITION, AND MANUFACTURING METHOD THEREOF |
DE10328450A1 (en) * | 2003-06-25 | 2005-01-20 | Rheinmetall W & M Gmbh | Method for eliminating coating and / or erosion damage |
US20190351484A1 (en) * | 2018-05-20 | 2019-11-21 | 3D Flexible, Inc. | Metal pastes for additive manufacturing |
-
2020
- 2020-01-17 FR FR2000429A patent/FR3106400A1/en active Pending
-
2021
- 2021-01-14 EP EP21719696.3A patent/EP4090909B1/en active Active
- 2021-01-14 KR KR1020227027262A patent/KR20230005114A/en unknown
- 2021-01-14 US US17/793,473 patent/US20230064872A1/en active Pending
- 2021-01-14 IL IL294748A patent/IL294748A/en unknown
- 2021-01-14 WO PCT/FR2021/050067 patent/WO2021144539A1/en unknown
-
2022
- 2022-08-01 ZA ZA2022/08594A patent/ZA202208594B/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP4090909B1 (en) | 2024-02-21 |
EP4090909C0 (en) | 2024-02-21 |
WO2021144539A1 (en) | 2021-07-22 |
IL294748A (en) | 2022-09-01 |
FR3106400A1 (en) | 2021-07-23 |
KR20230005114A (en) | 2023-01-09 |
US20230064872A1 (en) | 2023-03-02 |
ZA202208594B (en) | 2024-01-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2021144539A1 (en) | Device for laying paste patterns in a tube | |
EP2516356B1 (en) | Malleable solid explosive and method for obtaining it | |
EP1790626B1 (en) | Semicontiunuous process for making an explosive composite charge having a polyurethane matrix by using two components | |
EP0949224B1 (en) | Process for making an object from granular material and an igniter tube and propellant charge obtained by such a process | |
EP4090644A1 (en) | Igniter tube for a propellant charge | |
EP3887752B1 (en) | Ignition charge for ammunition, method for obtaining the same, igniter tube and ignition system using such a charge | |
EP0690229A1 (en) | Positive displacement pump with a rotary valve | |
FR2938837A1 (en) | COMPOSITE COMPOSITION FOR SOLID PROPERGOL COMPRISING A FERROCENIC DERIVATIVE AND A SUBMICRONIC ALUMINUM LOAD, SOLID PROPERGOL AND LOADING | |
WO2022129771A1 (en) | Method for obtaining nitrocellulose-based structures by means of additive manufacturing | |
EP0808813B1 (en) | Continuous process for the solventless production of pyrotechnical products having a thermosetting binder | |
FR2983194A1 (en) | Producing granules of compressible explosive composition obtained from powder material comprises coating powder material with liquid or pasty inert binder in a mixer, hardening coating by radiation polymerization, granulating and steaming | |
CH625196A5 (en) | ||
FR2835520A1 (en) | SEMI-CONTINUOUS TWO-COMPONENT PROCESS FOR SOLID PROPERGOL PASTE | |
EP1584610A2 (en) | Explosive composition | |
WO2023156729A1 (en) | Method for obtaining firing pastes in an acoustic resonance mixer. | |
EP3476821B1 (en) | Method for manufacturing a composite pyrotechnic product | |
WO2024062199A1 (en) | Combustible charges adhering to the inner wall of a combustible structure containing a propellant charge | |
EP1741690A2 (en) | Process and apparatus for continuous production of pyrotechnical objects | |
EP1767574A1 (en) | Process for the manufacture of energetic compositions comprising nanoparticles of an element or chemical compound dispersed in an organic matrix | |
EP3148957B1 (en) | Initiated pyrotechnic blocks and method for producing same | |
FR2984885A1 (en) | Producing pellets of compressible explosive composition from powder material comprising pulverulent explosive, comprises coating the material with binder consisting of 2,4-dinitroanisole and/or its isomer, and preheating binder to be fused |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20220715 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20230803 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: FRENCH |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602021009636 Country of ref document: DE |
|
U01 | Request for unitary effect filed |
Effective date: 20240319 |
|
U07 | Unitary effect registered |
Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI Effective date: 20240326 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PK Free format text: DIE PUBLIKATION VOM 17.04.2024 WURDE AM 24.04.2024 IRRTUEMLICHERWEISE ERNEUT PUBLIZIERT. LA PUBLICATION DU 17.04.2024 A ETE REPUBLIEE PAR ERREUR LE 24.04.2024. LA PUBBLICAZIONE DEL 17.04.2024 E STATA ERRONEAMENTE RIPUBBLICATA IL 24.04.2024. |
|
RAP4 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: EURENCO FRANCE SAS |
|
U1H | Name or address of the proprietor changed [after the registration of the unitary effect] |
Owner name: EURENCO FRANCE SAS; FR |