EP0051717A2 - Method for self-propelling projectile manufacturing and resulting projectiles thereof - Google Patents
Method for self-propelling projectile manufacturing and resulting projectiles thereof Download PDFInfo
- Publication number
- EP0051717A2 EP0051717A2 EP81106062A EP81106062A EP0051717A2 EP 0051717 A2 EP0051717 A2 EP 0051717A2 EP 81106062 A EP81106062 A EP 81106062A EP 81106062 A EP81106062 A EP 81106062A EP 0051717 A2 EP0051717 A2 EP 0051717A2
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- EP
- European Patent Office
- Prior art keywords
- projectile
- self
- propelling
- tubular
- shoulder
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
- B21K21/04—Shaping thin-walled hollow articles, e.g. cartridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/02—Making machine elements balls, rolls, or rollers, e.g. for bearings
- B21K1/025—Making machine elements balls, rolls, or rollers, e.g. for bearings of bullets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/10—Cartridges, i.e. cases with charge and missile with self-propelled bullet
Definitions
- the present invention relates to self-propelling projectiles, in parti cular of the type wherein the priming charge is activated by a radial or lateral percussion. More specifically, the present invention relates to a method for manufacturing projectiles in question and. to produ cts thus obtained. Self-propelling projectiles of this class are disclosed
- the recess made into the projectile body and fil led with the propelling charge is rearwardly closed with a disc of destructible material, so that as a consequence of the percussion a priming charge explosion occurs which, either directly or throughout flash holes, primes the propelling charge and the latter causes the projectile expulsion from the firearm barrel, without leaving into the gun chamber the traditional cartridge case to be ejected before the successive loa ding and firing of another projectile.
- Main object of the present invention is that of providing a self-propelling projectile wherein the inconveniences and operating problems as outlined above in short are substantially and advantageously settled.
- a more specific object of the present invention is that of providing a self-propelling projectile of structural features such to assure axial sliding of the projectile along the weapon barrel, after the percussion, and at the same time assuring an engagemnt with the weapon rifling such that any harmful axial wobble is prevented.
- Another specific oject of this invention is that of providing a self-propelling projectile of structural features such as to assure centering of the projectile inthe firearm chamber.
- a further specific object of this invention is that of providing a self-propelling projectile having a rearward end or base equipped with means that can be engaged by the extractor hook of the weapon breech block, so that, in case of misfire, the recocking operation permits extracting of the unexploded projectilefrom the weapon chamber.
- Still another object of the present invention is that of providing a method for the manufacturing of self-propelling projectiles in accordance with the invention of a reliable and simplified type, that will substantially avoid the industrial problems previously mentioned.
- a self-propelling projectile of the type including a shaped body having a solid forward portion and a tubular rearward portion, inside which there is formed a recess open towards the projectile base and closed with a layer of destruc tible material, in the said tubular portion there being housed a propelling charge in direct contact with a priming charge housed into an annular cavity, characterized by the fact that said cavity is formed between the internal surface of the said tubular rearward portion and a projecting skirt or flange, which is part of ..said solid forward portion, the surface of said skirt facing said cavity being fitted with flutings or corrugations substantially parallel to the projectile axis and projecting towards the interior of said cavity wall, wherein moreover the wall of said tubular rearward portion beginning from said destructable material layer shows a decreasing thickness and forms a projecting shoulder externally to the surface of said tubular portion, wherein the angle of inclination of its generating line should be within the range of 2° to 10
- the method for the manufacturing of the caseless projectile in accordance with the invention is characterized by the following operations:
- reference 20 generally indicates a projectile, self-propelled, adapted for actuation by. means of a radial or side percussion, of the type especially convenient to semi-automatic and automatic weapons, but which may also be used for single firing.
- Projectilesof this character are usually contained into a clip inserted into the weapon, thereafter the breech block forcing the clip uppermost projectile or cartridge into the weapon firing chamber.
- the projectile 20 includes a body 21 preferably of one-piece character, incorporating a solid nose 22, which is often referred to as the bullet, and a rearward tubular portion or casing 23.
- Nose 22 consists of a forward portion 24, which tapers rearwardly and outwardly, and a connecting portion 25, having a constant diameter the same as the maximum diameter of said forward portion 24; the maximum diameter of nose 22 and hence of the forward portion 24 is slightly less than that of the bore of the weapon for which the projectile is intended.
- the demarcation between nose 22 and casing 23 is effected by a narrow, rearwardly and outwardly tapered shoulder 26 from which said casing 23 progresses.
- the latter is of substantial ly constant diameter from the shoulder 26 up to a short distance from the base of said rearward casing 23 (as hereinafter described).
- the said short distance is defined by a plane passing through line (p) of fig.
- the internal surface of body 21 consists of a wall or base 29, limiting the chamber recess 28, and of an annular skirt or flange 30, being spaced radially inwardly from the outer wall of said casing 23, for defining therebetween an annular compart ment 128, being in free communication with chamber 28 throughout the annular .neck 228 .
- the annular compartment 128 contains a priming mixture'(m), of any known character, which in assembling is forced into said compartment usually as moist dough.
- annular skirt 30, on its outwardly directed surface is provided with circumferentially spaced apart, vertically extended corrugations, substantially in parallel with the axis of projectile 20.
- propellant charge 31 Received within chamber 28 is the propellant charge 31, which may be of any known suitable character, such as nitrocellulose, ballisti- tes or double and triple base powders, multiple component explosives having varied physical characters, as for instance in the form of laminate, granulate, spheric granules, rod-like members, flake-like members.
- propelling powders admixed with waterproofing or not-waterproofing varnishes, with asphaltic binders or in any way suitable to form a mass filling the interior volume of chamber 28.
- propellant charge 31 is tightly packed into the chamber 28 of said casing 23, and is enclosed rearwardly by a wad, layer or operculum of destructible material 33,usually varnished or waterproofed, located inwardly of the above said plane ( p ) .
- the angle of inclination of shoulder (b) with respect to the projectile axis should be preferably within the range of 2° and 10°, whilst the height of ⁇ the bulging or shoulder (b), that is the distance between the base opening 27 and a plane passing through line (p) should be preferably within the range of 0,15 and 0,30 of the diameter of said casing 23.
- the latter diameter is greater than the bore (caliber) of the associated weapon, and at least equivalent but preferably larger than the diameter of the barrel inner rifling,so that projectile 20, upon firing, will.have sufficient forceful contact with the firearm rifling in order that the latter will impart the desired axial rotation thereto.
- the maximum diameter of shoulder (b) will be of such extent as to relate to the diameter of the diametrally constant portion of casing 23, or as that passing through line (p), in a ratio of preferably approximately 1. 01 to 1.05.
- shoulder (b) shall have a maximum diameter greater than that of both the bore and the rifling of the related firearm, so that when projectile 20 is rammed therein by operation of the breech block, shoulder (b), by reason of its relative thinness, will be radially compressed and thus diametrally reduced whereby a friction fit is brought about with assures that projectile 20 is in correct position for alignment with the firing pin, as schematically indicated at F.
- the relatively thin-walled nature of casing 23 at shoulder (b) will thus assure an appropriate snug seal with the firearm bore, upon firing the full effectiveness of the explosive gases operating upon the projectile ( as gas leakages are prevented) being thereby utilized, without impeding the projectile travel through the firearm barrel.
- flutings or corrugations 32 inside the annular compartment128, markedly enhance the striking sensibility and hence the reliability of ignition, in that peaks and valleys of corrugations serve in the nature of anvils for the firing pin operating along F.
- corrugations 32 causes a more effective compression of the priming charge mixture, which results in a greater reliability.
- a last feature and important advantage of the projectile in accordance with the invention is its base conformance in that while shoulder (b) ensures centering into the barrel, the void space (34) provided between disc 33 and opening 27, as well as inward partial turning (crimping) of the rearward end of casing 23 ensure a particular interaction with the firearm breech block and its associated extractor hook.
- this extractor hook will normally interlock with the crimp(c) inside void space (34) It will be recognized that when the projectile 20 is forced (as alrea dy explained) into the gun chamber of the firearm, it will be traveling at a relatively high rate of speed, so that when the breech block slams home, the inertia will force the projectile 20 away from the face of the block as far as the extractor hook will permit. Such play will thus allow for a variation in the location of projectile 20 within the chamber, but by reason of the shoulder (b) with the developed friction fit between projectile 20 and the gun chamber, the inertia is insufficient to cause projectile 20 to move from the bolt face.
- the firearm may be manually recocked to allow extraction of the unfired projectile from the chamber.
- the firearm will thus remain inactive until the defective projectile- has been removed. It will be appreciated that such a feature is of extreme importance with fast firing weapons since the chambers thereof are normally quite hot and would cause the propellant to explode in a very short period of time.
- projectile 20 of this invention is of most novel construc tion for bringing about a positive interlock with the breech block extractor and thus the above noted safety factor will'result strongly enhanced.
- the projectile of figure 1 is modified only in that within the exterior of casing 23, in contact with the bore and barrel riflings, corrugations 40 are provided in order to establish a gap into said contact thus reducing the sliding friction surface of projectile 20 within limits such to reduce the effort required by the projectile for its motion into the barrel and its exit out of the firearm.
- FIG. 12 therein illustrated is the sequence of steps, in a preferred embodiment, of the method in accordance with the invention. It will be appreciated that almost all figures are of dual character showing the projectile or preform as sectional and as side views. Moreover, it will be worth mentioning the fact that operations illustrated below are normally known for persons skilled in the art or generally in mechanics thus permitting avoidance of execution details.
- the preform 50 as illustrated in figures 4A and 4B, is formed by pressing of a wire in order to obtain nose 22 with portion 24 and 25, as identified in figure 1, and a portion 51 wherefrom casing 23 of figure 1 will be made.
- a second extrusion (figures 6A and 6B) is made in order to complete annular skirt 30 (with related corrugations 32) and the annular compartment 128.
- the preform 50 is subjected to a drawing (figures 7A & 7B) wherefrom the rearward casing 23 and interior of chamber 28 for the propellent charge is formed.
- the drawing is completed (figures 8A & 8B) into dimensions desired for the projectile and primarily for rearward casing 23.
- the primer (m) is forced into annular compartment 128 (figure 10).
- the primer is preferably of a pasty character so that it will adhere to corrugations 32 wherefrom it will be retained upon drying.
- thissolution is primarily carried out by means of deformation of the skirt 30 which is radially forced so that its lowermost edge is flared towards the adjacent wall of interior of chamber 28 of casing 23.
- Annular neck 228 is thus formed through which the priming charge communicates with the interior of chamber 28.
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- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Toys (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
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Abstract
Description
- The present invention relates to self-propelling projectiles, in parti cular of the type wherein the priming charge is activated by a radial or lateral percussion. More specifically, the present invention relates to a method for manufacturing projectiles in question and. to produ cts thus obtained. Self-propelling projectiles of this class are disclosed
- in Italian Patents Nrs. 866.111, 932,381 and 972,058 I.n these Patents self-propelling projectiles are described that include a projectile body which is suitably shaped, for instance as an ogive, a propelling charge housed into a recess made in to said body and a priming charge which is annularly placed and suitable 'to be activated by a radial or side percussion in respect to the said projectile body. The recess made into the projectile body and fil led with the propelling charge is rearwardly closed with a disc of destructible material, so that as a consequence of the percussion a priming charge explosion occurs which, either directly or throughout flash holes, primes the propelling charge and the latter causes the projectile expulsion from the firearm barrel, without leaving into the gun chamber the traditional cartridge case to be ejected before the successive loa ding and firing of another projectile.
- In terms of operating easyness, firing speed and auxiliary problem eli mination (as for instance the temporary storage of cartridge cases fired with traditional weapons as installed on aircrafts and armoured means), the advantages of projectile of the above said class are evident and do not need further comments.
- However, also for the projectilesas set forth in said Patents, some pro blems and inconveniences have been noticed of remarkable importance in many applications, that in short can be summanzedas follows: 1) In order to assure a full exploitation of gases as developed within the firing chamber and hence of the power as produced by the propelling charge firing, a remarkable snug seal is needed between the projectile external surface, the firearm chamber adjacent walls and the barrel bore.
- 2) In case of misfiring or not-firing, the ejection of the unexploded projectile from the weapon results difficult.
- To these exquisitely operating problems there are to be added those connected with the production of projectiles in question.
- As a matter of fact, in the case of projectiles as set forth in the previously mentioned Italian Patent 866111, many different precision machinings are required either to form the inwardly turned part of the bottom edge wherein the primer is contained with relatirg flash holes for connection with the propelling charge, or for the loading of the propelling charge.
- In the instance of projectiles as set forth in Italian Patents Nrs. 932381 and 972058, the relating drawings are sufficient to demonstrate the manufacturing complexities, primarily under the machining aspect and of the successive assembling of the different components of the projectile.
- Main object of the present invention is that of providing a self-propelling projectile wherein the inconveniences and operating problems as outlined above in short are substantially and advantageously settled. A more specific object of the present invention is that of providing a self-propelling projectile of structural features such to assure axial sliding of the projectile along the weapon barrel, after the percussion, and at the same time assuring an engagemnt with the weapon rifling such that any harmful axial wobble is prevented.
- Another specific oject of this invention is that of providing a self-propelling projectile of structural features such as to assure centering of the projectile inthe firearm chamber.
- A further specific object of this invention is that of providing a self-propelling projectile having a rearward end or base equipped with means that can be engaged by the extractor hook of the weapon breech block, so that, in case of misfire, the recocking operation permits extracting of the unexploded projectilefrom the weapon chamber. Still another object of the present invention is that of providing a method for the manufacturing of self-propelling projectiles in accordance with the invention of a reliable and simplified type, that will substantially avoid the industrial problems previously mentioned. These and other objects are attained with a self-propelling projectile of the type including a shaped body having a solid forward portion and a tubular rearward portion, inside which there is formed a recess open towards the projectile base and closed with a layer of destruc tible material, in the said tubular portion there being housed a propelling charge in direct contact with a priming charge housed into an annular cavity, characterized by the fact that said cavity is formed between the internal surface of the said tubular rearward portion and a projecting skirt or flange, which is part of ..said solid forward portion, the surface of said skirt facing said cavity being fitted with flutings or corrugations substantially parallel to the projectile axis and projecting towards the interior of said cavity wall, wherein moreover the wall of said tubular rearward portion beginning from said destructable material layer shows a decreasing thickness and forms a projecting shoulder externally to the surface of said tubular portion, wherein the angle of inclination of its generating line should be within the range of 2° to 10° with respect to the projectile axis.
- In turn, the method for the manufacturing of the caseless projectile in accordance with the invention is characterized by the following operations:
- a) pressing of the projectile solid perform from metal wire or band;
- b) drop-forging of the preform to partially form said recess of said tubular rearward portion and said skirt delimiting the hollow space for priming charge housing, and corrugation manufacturing;
- c)drawing the perform for the completion of said tubular portion;
- d) loading of the priming charge into said hollow space and pressing to 'cbform said skirt in order to flare its base end projecting into said recess, approaching said base end to the adjacent wall of said tubular rearward portion;
- e) loading with a propelling charge and enclosing of the same with a layer of destructible material:
- f) rimming or partial bending of the base edge towards the interior of said tubular rearward portion.
- The features and advantages of the self-propelling projectile and method in accordance with the present invention will appear more clearly from the following detailed description made in connection with attached drawings, wherein:
- Figure 1 is a side view, in partial section, of the caseless projectile in accordance with the invention:
- Figure 2 is a sectional view taken on the line 2 - 2 fig. 1;
- Figure 3 is a view similar to fig. 1 of another embodiment of the projectile of the fig. 1;
- Figures 4A, 4B, 5A, 5B, 6A, 6B, 7A, 7B, 8A, 8B, 9A, 9B, 10, 11A, 11B, 12A, 12B, are schematic views fo the manufacturing stages of the projectile of fig. 1.
- With reference to the drawings that illustrate without limiting purpose a preferred embodiment of the invention and manufacturing method,
reference 20 generally indicates a projectile, self-propelled, adapted for actuation by. means of a radial or side percussion, of the type especially convenient to semi-automatic and automatic weapons, but which may also be used for single firing. - Projectilesof this caracter are usually contained into a clip inserted into the weapon, thereafter the breech block forcing the clip uppermost projectile or cartridge into the weapon firing chamber.
- The
projectile 20 includes abody 21 preferably of one-piece character, incorporating asolid nose 22, which is often referred to as the bullet, and a rearward tubular portion orcasing 23. -
Nose 22 consists of aforward portion 24, which tapers rearwardly and outwardly, and a connectingportion 25, having a constant diameter the same as the maximum diameter of saidforward portion 24; the maximum diameter ofnose 22 and hence of theforward portion 24 is slightly less than that of the bore of the weapon for which the projectile is intended. The demarcation betweennose 22 andcasing 23 is effected by a narrow, rearwardly and outwardly taperedshoulder 26 from which saidcasing 23 progresses. The latter is of substantial ly constant diameter from theshoulder 26 up to a short distance from the base of said rearward casing 23 (as hereinafter described). The said short distance is defined by a plane passing through line (p) of fig. 1, from which thecasing 23 forms an outwardly inclined bulging or shoulder (b), terminating into a portion (c), partially turned inwardly, which defines the edge of anopening 27, which permits communication between the interior of achamber 28 in the rearward of theprojectile casing 23 and the exterior. - Internally of
projectile 20, the internal surface ofbody 21 consists of a wall orbase 29, limiting the chamber recess 28, and of an annular skirt orflange 30, being spaced radially inwardly from the outer wall of saidcasing 23, for defining therebetween anannular compart ment 128, being in free communication withchamber 28 throughout the annular .neck 228 . - The
annular compartment 128 contains a priming mixture'(m), of any known character, which in assembling is forced into said compartment usually as moist dough. - As may best be seen in figure 2,
annular skirt 30, on its outwardly directed surface is provided with circumferentially spaced apart, vertically extended corrugations, substantially in parallel with the axis ofprojectile 20. - Received within
chamber 28 is thepropellant charge 31, which may be of any known suitable character, such as nitrocellulose, ballisti- tes or double and triple base powders, multiple component explosives having varied physical characters, as for instance in the form of laminate, granulate, spheric granules, rod-like members, flake-like members. There may be moreover utilized propelling powders admixed with waterproofing or not-waterproofing varnishes, with asphaltic binders or in any way suitable to form a mass filling the interior volume ofchamber 28. - It will be seen, however, that
such propellant charge 31 is tightly packed into thechamber 28 of saidcasing 23, and is enclosed rearwardly by a wad, layer or operculum ofdestructible material 33,usually varnished or waterproofed, located inwardly of the above said plane (p). - In the zone of said
operculum 33 the wall of saidcasing 23 gradually decreases in thickess towards the edge portion (c) for the purpose hereinafter illustrated. - Moreover, it has been found thatthe angle of inclination of shoulder (b) with respect to the projectile axis should be preferably within the range of 2° and 10°, whilst the height of τthe bulging or shoulder (b), that is the distance between the base opening 27 and a plane passing through line (p) should be preferably within the range of 0,15 and 0,30 of the diameter of said
casing 23. The latter diameter is greater than the bore (caliber) of the associated weapon, and at least equivalent but preferably larger than the diameter of the barrel inner rifling,so thatprojectile 20, upon firing, will.have sufficient forceful contact with the firearm rifling in order that the latter will impart the desired axial rotation thereto. - The maximum diameter of shoulder (b) will be of such extent as to relate to the diameter of the diametrally constant portion of
casing 23, or as that passing through line (p), in a ratio of preferably approximately 1. 01 to 1.05. - Thus shoulder (b) shall have a maximum diameter greater than that of both the bore and the rifling of the related firearm, so that when
projectile 20 is rammed therein by operation of the breech block, shoulder (b), by reason of its relative thinness, will be radially compressed and thus diametrally reduced whereby a friction fit is brought about with assures thatprojectile 20 is in correct position for alignment with the firing pin, as schematically indicated at F. Moreover, the relatively thin-walled nature ofcasing 23 at shoulder (b) will thus assure an appropriate snug seal with the firearm bore, upon firing the full effectiveness of the explosive gases operating upon the projectile ( as gas leakages are prevented) being thereby utilized, without impeding the projectile travel through the firearm barrel. - It will be worth mentioning that flutings or
corrugations 32, inside the annular compartment128, markedly enhance the striking sensibility and hence the reliability of ignition, in that peaks and valleys of corrugations serve in the nature of anvils for the firing pin operating along F. - In effect, the generally irregular surface developed by
corrugations 32 causes a more effective compression of the priming charge mixture, which results in a greater reliability. - In this connection, it will be moreover recognized that the projectile structure in accordance with the invention naturally develops in itself the anvil against which the priming mixture is compressed without need of inserts or auxiliary members in order to constitute such anvil.
- A last feature and important advantage of the projectile in accordance with the invention is its base conformance in that while shoulder (b) ensures centering into the barrel, the void space (34) provided between
disc 33 and opening 27, as well as inward partial turning (crimping) of the rearward end ofcasing 23 ensure a particular interaction with the firearm breech block and its associated extractor hook. - Effectively, this extractor hook, normally carried by the breech block, will normally interlock with the crimp(c) inside void space (34) It will be recognized that when the
projectile 20 is forced (as alrea dy explained) into the gun chamber of the firearm, it will be traveling at a relatively high rate of speed, so that when the breech block slams home, the inertia will force theprojectile 20 away from the face of the block as far as the extractor hook will permit. Such play will thus allow for a variation in the location ofprojectile 20 within the chamber, but by reason of the shoulder (b) with the developed friction fit betweenprojectile 20 and the gun chamber, the inertia is insufficient to causeprojectile 20 to move from the bolt face. - By reason of the interengagement with the extractor hook, the breech block or bolt will remain in forward or closed position should a misfire occur. In such an eventuality., the firearm may be manually recocked to allow extraction of the unfired projectile from the chamber. The firearm will thus remain inactive until the defective projectile- has been removed. It will be appreciated that such a feature is of extreme importance with fast firing weapons since the chambers thereof are normally quite hot and would cause the propellant to explode in a very short period of time.
- Accordingly,
projectile 20 of this invention is of most novel construc tion for bringing about a positive interlock with the breech block extractor and thus the above noted safety factor will'result strongly enhanced. - Referring now to the modification illustrated in figure 3, the projectile of figure 1 is modified only in that within the exterior of
casing 23, in contact with the bore and barrel riflings,corrugations 40 are provided in order to establish a gap into said contact thus reducing the sliding friction surface ofprojectile 20 within limits such to reduce the effort required by the projectile for its motion into the barrel and its exit out of the firearm. Considering now figures 4 to 12, therein illustrated is the sequence of steps, in a preferred embodiment, of the method in accordance with the invention. It will be appreciated that almost all figures are of dual character showing the projectile or preform as sectional and as side views. Moreover, it will be worth mentioning the fact that operations illustrated below are normally known for persons skilled in the art or generally in mechanics thus permitting avoidance of execution details. Thepreform 50, as illustrated in figures 4A and 4B, is formed by pressing of a wire in order to obtainnose 22 withportion portion 51 wherefrom casing 23 of figure 1 will be made. - Pressing (upon annealing, pickling and washing) will be followed by a first extrusion phase (figures 5A and 5B), wherein the skirt or
annular flanges 30 andwall 29 are obtained fromportion 51, thus identifying already theannular compartment 128 wherein the priming charge will be contained. - Upon completion of routine washing, annealing, pickling and washing phases, a second extrusion (figures 6A and 6B) is made in order to complete annular skirt 30 (with related corrugations 32) and the
annular compartment 128. Upon repetition of same operations as made after the first extrusion, thepreform 50 is subjected to a drawing (figures 7A & 7B) wherefrom therearward casing 23 and interior ofchamber 28 for the propellent charge is formed. After a washing, the drawing is completed (figures 8A & 8B) into dimensions desired for the projectile and primarily forrearward casing 23. Upon a washing and an equalizing (figures 9A & 9B) of the projectile base, the primer (m) is forced into annular compartment 128 (figure 10). - As already discussed, the primer is preferably of a pasty character so that it will adhere to corrugations 32 wherefrom it will be retained upon drying.
- However, this fonction is primarily carried out by means of deformation of the
skirt 30 which is radially forced so that its lowermost edge is flared towards the adjacent wall of interior ofchamber 28 ofcasing 23. -
Annular neck 228 is thus formed through which the priming charge communicates with the interior ofchamber 28. - In the successive phase (figure 11A & 11B) the projectible is loaded with the propellant charge of any convenient physical character and chemical composition, and
layer 33 is thereafter provided, preferably as an operculum of cardboard varnished with a waterproofing varnish. The invention, either for what attains to the caselees projectile or the manufacturing method, has been described in connection with the preferred embodiment, 'being understood that modifications and changes, conceptually and mechanically equivalent in character, are possible without exceeding limits thereof.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81106062T ATE13722T1 (en) | 1980-11-11 | 1981-08-03 | METHOD OF MAKING SELF-PROPELLED MULLETS AND MULLETS MADE BY THIS METHOD. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT25869/80A IT1133782B (en) | 1980-11-11 | 1980-11-11 | METHOD FOR THE MANUFACTURE OF SELF-PROPELLING AND RESULTING PROJECTILES |
IT2586980 | 1980-11-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0051717A2 true EP0051717A2 (en) | 1982-05-19 |
EP0051717A3 EP0051717A3 (en) | 1982-09-08 |
EP0051717B1 EP0051717B1 (en) | 1985-06-05 |
Family
ID=11217975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81106062A Expired EP0051717B1 (en) | 1980-11-11 | 1981-08-03 | Method for self-propelling projectile manufacturing and resulting projectiles thereof |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0051717B1 (en) |
AT (1) | ATE13722T1 (en) |
BE (1) | BE890765A (en) |
DE (1) | DE3170835D1 (en) |
FR (1) | FR2493978A1 (en) |
IT (1) | IT1133782B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005116566A1 (en) * | 2004-05-25 | 2005-12-08 | Heckler & Koch Gmbh | Arrangement consisting of a breech-block and of a projectile surrounding the propellant charge and the priming charge |
Citations (6)
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BE426776A (en) * | ||||
US1468822A (en) * | 1920-08-06 | 1923-09-25 | Firm Pilum A G | Projectile and means to fire the same |
DE719483C (en) * | 1938-01-06 | 1942-04-09 | Waffen Und Munitionsfabriken A | Process for the production of floor jackets with false floors |
FR1458198A (en) * | 1965-06-09 | 1966-11-10 | Haut Rhin Manufacture Machines | Manufacturing process for ammunition cases |
US3498221A (en) * | 1968-07-11 | 1970-03-03 | Harvey Aluminum Inc | Aluminum cartridge case |
FR2140089A1 (en) * | 1971-05-31 | 1973-01-12 | Fiocchi Spa Giulio |
-
1980
- 1980-11-11 IT IT25869/80A patent/IT1133782B/en active
-
1981
- 1981-08-03 EP EP81106062A patent/EP0051717B1/en not_active Expired
- 1981-08-03 AT AT81106062T patent/ATE13722T1/en not_active IP Right Cessation
- 1981-08-03 DE DE8181106062T patent/DE3170835D1/en not_active Expired
- 1981-08-28 FR FR8116437A patent/FR2493978A1/en not_active Withdrawn
- 1981-10-16 BE BE0/206268A patent/BE890765A/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE426776A (en) * | ||||
US1468822A (en) * | 1920-08-06 | 1923-09-25 | Firm Pilum A G | Projectile and means to fire the same |
DE719483C (en) * | 1938-01-06 | 1942-04-09 | Waffen Und Munitionsfabriken A | Process for the production of floor jackets with false floors |
FR1458198A (en) * | 1965-06-09 | 1966-11-10 | Haut Rhin Manufacture Machines | Manufacturing process for ammunition cases |
US3498221A (en) * | 1968-07-11 | 1970-03-03 | Harvey Aluminum Inc | Aluminum cartridge case |
FR2140089A1 (en) * | 1971-05-31 | 1973-01-12 | Fiocchi Spa Giulio |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005116566A1 (en) * | 2004-05-25 | 2005-12-08 | Heckler & Koch Gmbh | Arrangement consisting of a breech-block and of a projectile surrounding the propellant charge and the priming charge |
Also Published As
Publication number | Publication date |
---|---|
FR2493978A1 (en) | 1982-05-14 |
IT1133782B (en) | 1986-07-09 |
EP0051717B1 (en) | 1985-06-05 |
EP0051717A3 (en) | 1982-09-08 |
BE890765A (en) | 1982-02-15 |
IT8025869A0 (en) | 1980-11-11 |
DE3170835D1 (en) | 1985-07-11 |
ATE13722T1 (en) | 1985-06-15 |
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