EP0369401B1 - Piège à balles - Google Patents

Piège à balles Download PDF

Info

Publication number
EP0369401B1
EP0369401B1 EP89121071A EP89121071A EP0369401B1 EP 0369401 B1 EP0369401 B1 EP 0369401B1 EP 89121071 A EP89121071 A EP 89121071A EP 89121071 A EP89121071 A EP 89121071A EP 0369401 B1 EP0369401 B1 EP 0369401B1
Authority
EP
European Patent Office
Prior art keywords
layer
bullet
synthetic material
thermoplastic synthetic
thermoplastic
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.)
Expired - Lifetime
Application number
EP89121071A
Other languages
German (de)
English (en)
Other versions
EP0369401A2 (fr
EP0369401A3 (fr
Inventor
Peter Knauf
Rudolf Hesse
Hans Joachim Götz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOHSE, GUENTER, DIPL.-VOLKSWIRT
Original Assignee
Lohse Guenter Dipl-Volkswirt
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lohse Guenter Dipl-Volkswirt filed Critical Lohse Guenter Dipl-Volkswirt
Publication of EP0369401A2 publication Critical patent/EP0369401A2/fr
Publication of EP0369401A3 publication Critical patent/EP0369401A3/fr
Application granted granted Critical
Publication of EP0369401B1 publication Critical patent/EP0369401B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
    • F41J13/00—Bullet catchers

Definitions

  • the invention relates to a projectile trap consisting of at least one layer with at least one molded part made of a projectile trap material for braking and / or picking up projectiles, the projectile trapping material being made of thermoplastic material.
  • the invention further relates to a method for the recovery of molded parts for the projectile trap.
  • Bullet trapping devices in which the projectiles are braked and caught by at least one layer of bullet trapping material are known.
  • the bullet trapping material is manufactured inexpensively using waste rubber.
  • DE 32 12 781 A1 discloses a bullet trapping material which is formed from waste rubber granulate with a synthetic resin binder.
  • DE 34 18 626 A1 provides layers of waste rubber granulate and polyurethane adhesive.
  • the bullet trapping material used in DE 34 42 984 A1 consists of an elastic material, such as rubber, regenerated rubber or elastomers. All these bullet trapping materials, whether homogeneous or heterogeneous, have in common that they are permanently networked, at least in some areas. Mechanical or thermal recycling of both the bullet trapping material and the bullet lead is therefore impossible.
  • thermoplastic bullet trap which consists of a viscous mixture of coal tar, coal pitch, Goudron, epuree, clay and sand.
  • the projectiles can be removed from this mass by melting, so that a complete recovery of both the projectile trapping material and the projectile material is possible.
  • the retention effect of the mass is so low that a high layer density is necessary.
  • Another disadvantage is that the tough, always flowable mass can only be used in closed containers can, the wall on the bombardment side often having to be replaced.
  • DE-OS 15 78 238 discloses a bullet trap made of polyisobutylene alone or in combination with butyl rubber or rubber-like substances with the addition of fillers.
  • the mass described there is kneadable, ie soft and of variable shape. It can be housed in a box open to the decision side or used to coat walls etc. The projectiles can be removed from the mass and this can be kneaded again in shape.
  • the disadvantage is that the modeling clay described can only be freed from the projectiles with a lot of work or with complicated kneading machines.
  • the mass contains a thermoplastic plastic
  • the apparatus-simple possibility of thermal separation of projectiles and bullet trap material is not provided in DE-OS 15 78 238; the preferably very high proportion of solid fillers according to this publication results in poor flow behavior up to the decomposition temperature.
  • the invention is based on the object to provide a projectile safety device or a bulletproof wall which brakes the projectile in a rebound-proof manner and in which both the projectile and the projectile material can be recovered thermally in a simple and economical manner.
  • thermoplastic is dimensionally stable at room temperature and has a viscosity at a temperature of at most 200 ° C, preferably 150 ° C, which drips allowed.
  • Projectiles hitting the projectile safety device designed according to the invention penetrate into the elastic material and release their kinetic energy relatively slowly as they pass.
  • the firing channel closes behind the penetrated projectile due to the elasticity. A deflection of floor parts or even a floor rebound is avoided with a high degree of reliability. Bulletproofness is guaranteed in any case with the appropriate thickness design.
  • the thermal material is dimensionally stable at room temperature, there is no need for stabilizing side walls on the projectile device.
  • thermoplastic plastic has a viscosity which allows dripping at a temperature of at most 150 ° C.
  • the melting point of the thermoplastic should preferably be below 100 ° C.
  • Suitable materials of the layer made of thermoplastic material are thermoplastic polyethylene, polyvinyl chloride, polyvinyl ether, polybutylene, polyisobutylene, polyacrylic acid ester, methyl silicone or their copolymers or mixtures.
  • a low molecular weight thermoplastic without fillers is preferably used.
  • the copolymers and derivatives or mixtures thereof given in Table I are also suitable.
  • thermoplastic can also be added to the thermoplastic, which on the one hand allows easier adjustment of the physical material properties than molded parts of a projectile trap and on the other hand a reduction in the melting point for easier separation of the thermoplastic material from the projectile residues.
  • the layer of thermoplastic material is formed from cuboid plastic blocks assembled in the manner of a wall.
  • Plastic blocks of this type can be produced particularly easily, for example by casting or sawing from a large plate, and moreover allow any size combination to form one or more adjoining walls.
  • thermoplastic layer for example made of V2A
  • V2A thermoplastic plastic facing away from the direction of insertion.
  • This sheet steel underlay provides the necessary bulletproofness even with a smaller thickness of the thermoplastic layer.
  • the combination of thermoplastic and steel sheet therefore requires a smaller overall thickness and, moreover, has practically all of the aforementioned advantages of a metal-free bullet trap.
  • This combination of a thermoplastic layer and a sheet steel is particularly suitable for the production of a portable indoor shooting range. Advantages of such a design of a room shooting range are its relatively light weight, its absolute bulletproofness and freedom from rebounding or projectiles.
  • thermoplastic layer holds back the projectiles and parts of the projectile and can easily be replaced when the capacity is exhausted, if - according to a further development of the invention - the thermoplastic layer consists of several plates and the plates are attached to holding pins which are firmly connected to the steel sheet rear wall.
  • a sound-absorbing layer for example made of mineral wool or a textile fleece, can be arranged on the entry side of the thermoplastic plastic layer.
  • a method for recovering molded parts of the projectile trap according to the invention is characterized by the characterizing features of claim 12. This simple way of disposal of the projectile catch of projectile, in particular lead residues, combined with recycling of the projectile receiving element, makes both the manufacture and the operation of the entire projectile device less expensive.
  • FIG. 1 shows a part of a floor trap wall 1 constructed according to the invention, consisting of a plurality of cuboid blocks 10 made of thermoplastic and placed one above the other and one above the other Plastic.
  • the dimensions of the individual blocks in the firing direction 12 are dimensioned large enough to reliably brake the projectile within a block 10 to a standstill. This also applies to the joints 11 between the blocks.
  • a projectile penetrating in the direction of arrow 12 into the thermoplastic wall 1 is braked practically continuously and relatively slowly in the wall 1, penetrates deep into the wall and in any case maintains its shape to such an extent that the projectile is not significantly deformed or burst apart.
  • the wall 1 can be fixed in the vertical plane by suitable carrier means on the rear side 13 opposite the entry point and / or by a positive interlocking of the individual plastic blocks 10 at their joints in the manner of toy building blocks.
  • FIG. 2 shows schematically a sectional view through a multi-layer wall covering 2, which is designed according to the invention.
  • the essential component of the wall covering 2 is at least one layer 20 made of thermoplastic material.
  • a rear wall 21 made of sheet steel is arranged on the rear side of the thermoplastic layer 20 facing away from the entry side.
  • a plurality of retaining pins 22 and anchors 23 are connected to the rear wall 21.
  • the elements of the plastic layer 20 consisting of several thermoplastic plastic plates are plugged onto the holding pins 22.
  • the arrangement of the thermoplastic layer 20 which brakes the projectiles therefore corresponds to the plastic wall 1 of the exemplary embodiment in FIG. 1, which is composed of blocks.
  • thermoplastic layer 20 On the entry side of the thermoplastic layer 20 there is a layer, for example a fleece 24, made of sound-absorbing material with the help of the fixed to the steel rear wall 21 anchor 23 attached.
  • the wall covering according to FIG. 2 can be put together with other wall coverings of the same or similar design to form a room lining with walls running at right angles.
  • Floor slabs, ceiling and side panels can have an appropriate design and can be put together to form a portable indoor shooting range.
  • At least one block 10 (or a plate of the thermoplastic layer 20) is inserted into a recycling furnace 3 and brought to a temperature above the melting point of the thermoplastic material from which the block 10 is made by means of a warm air heater 30.
  • This temperature which can be around 100 ° C, for example, is significantly lower than the melting temperature of the lowest-melting projectile component, in particular lead (327 ° C).
  • the block 10 used and, if possible, loaded to the full capacity with projectile residues is melted by the heat treatment, and the melted plastic runs down through the sieve 31 and / or a lateral outlet 32.
  • In the lower end of the rycycling furnace 3 there is an outlet opening 34 through which the melted plastic material can flow into an underlying collecting mold 35.
  • the mold 35 can serve as a mold for forming a new block 10.
  • the solid projectile material collects on the sieve 31 after the plastic material has melted. Under certain circumstances, however, it is expedient to place the much heavier projectile material on a furnace floor, for example the sieve 31 Let sediment and the possibly somewhat viscous and hard-to-drip plastic material to the side, drain through a large side opening or skim. When the plastic material is removed from the side, the use of a nose-shaped projection 36 is recommended, on which the projectile parts, in particular lead parts, which are sedimented under their own weight are retained.
  • the furnace 3 itself can also be provided with a suitable tilting device for pouring off the molten thermoplastic.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing Of Solid Wastes (AREA)
  • Laminated Bodies (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Combined Means For Separation Of Solids (AREA)

Claims (14)

  1. Dispositif de captage de projectiles avec au moins une couche (1,20) freinant les projectiles et/ou les recevant, réalisée en un matériau de captage de projectiles ayant des propriétés thermoplastiques, caractérisé en ce que la couche (1,20) est composée en au moins une pièce façonnée (10) en matière synthétique thermoplastique, qui présente une résistance de forme à la température ambiante et qui a, à une température maximale de 200 °C, de préférence 150 °C, une viscosité permettant son égouttement.
  2. Dispositif selon la revendication 1, caractérisé en ce que la pièce façonnée (10) est en polyéthylène, polychlorure de vinyle, polyéther de vinyle, polybutylène, polyisobutylène, polypropylène, polyacétate de vinyle, polyester d'acide acrylique, méthylsilicone, thermoplastique, leurs copolymèrisats ou mélanges, ou bien des copolymerisats ou mélanges de leurs dérivés.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le point de fusion de la matière synthétique thermoplastique est inférieur à 100°C.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que l'on ajoute par mélange un plastifiant à la matière synthétique thermoplastique.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la couche (1) en matière synthétique thermoplastique est composée de pièces façonnées (10) de forme parallépipédique, assemblées à la manière d'une paroi.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que, sur la face arrière, opposée à la face d'impact de tir de la couche (20) en matière synthétique thermoplastique, est disposée une paroi arrière (21) en tôle d'acier.
  7. Dispositif selon la revendication 6, caractérisé en ce qu'une couche (24) en matériau amortissant le bruit est appliquée sur la face, opposée à la paroi arrière (21), de la couche de matière synthétique thermoplastique (20).
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que la couche (20) en matière synthétique thermoplastique est réalisée en plusieurs plaques et en ce que les plaques sont montées sur des tiges de maintien (22) reliées rigidement à la paroi arrière de tôle en acier (21).
  9. Dispositif selon l'une des revendications 6 à 8, caractérisé en ce que la paroi arrière (21) est réalisée en V2A.
  10. Dispositif selon l'une des revendications 6 à 9, caractérisé en ce que plusieurs parois (2), offrant une sécurité à la pénétration de tirs, avec au moins une plaque de fond, au moins un revêtement de plafond et au moins deux revêtements latéraux sont raccordés pour constituer une installation de tir réel transportable.
  11. Procédé de récupération de pièces façonnées du dispositif de captage de projectiles selon l'une des revendications 1 à 10, caractérisé en ce que l'on opère un démontage de pièces façonnées utilisées dans un captage de projectiles comme éléments d'une couche de matière synthétique thermoplastique et ayant atteint au moins partiellement leur capacité de rétention et on les chauffe dans un four, à une température dépassant leur point de fusion, cependant inférieure à 200 °C, on opère une séparation entre la matière thermoplastique liquéfiée et le matériau des projectiles, puis la matière synthétique thermoplastique récupérée est remise à la forme prévue et refroidie.
  12. Procédé selon la revendication 11, caractérisé en ce que l'on fait s'égoutter la matière synthétique thermoplastique après la liquéfaction à travers un tamis ou une grille et l'on capte les morceaux de projectiles sur le tamis ou la grille.
  13. Dispositif selon la revendication 11, caractérisé en ce que, pendant le chauffage de la matière synthétique thermoplastique, on laisse sédimenter les morceaux de projectiles et on écume ou laisse s'écouler la matière synthétique liquéfiée.
  14. Procédé selon l'une des revendications 11 à 13, caractérisé en ce que l'on coule dans des moules la matière synthétique thermoplastique séparée des morceaux de projectiles, puis on la laisse durcir.
EP89121071A 1988-11-18 1989-11-14 Piège à balles Expired - Lifetime EP0369401B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3839000A DE3839000A1 (de) 1988-11-18 1988-11-18 Geschossfangvorrichtung
DE3839000 1988-11-18

Publications (3)

Publication Number Publication Date
EP0369401A2 EP0369401A2 (fr) 1990-05-23
EP0369401A3 EP0369401A3 (fr) 1991-03-20
EP0369401B1 true EP0369401B1 (fr) 1994-07-06

Family

ID=6367402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89121071A Expired - Lifetime EP0369401B1 (fr) 1988-11-18 1989-11-14 Piège à balles

Country Status (4)

Country Link
EP (1) EP0369401B1 (fr)
AT (1) ATE108270T1 (fr)
DE (2) DE3839000A1 (fr)
ES (1) ES2061892T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108858941A (zh) * 2018-06-28 2018-11-23 星际控股集团有限公司 一种收弹筒及其制作工艺

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4039491A1 (de) * 1990-12-11 1992-06-17 Bernd Wahl Schiessscheibe
DE4119397A1 (de) * 1991-06-12 1992-12-17 Rotta Gmbh & Co Dr Geschossfangmasse
DE4122877A1 (de) * 1991-07-11 1993-01-14 Messerschmitt Boelkow Blohm Vorrichtung zur vermeidung von geschossabprallern
AU6928594A (en) * 1993-05-18 1994-12-12 Scovati Italia S.R.L. Projectile trap
DE19506716C2 (de) * 1994-03-05 1999-06-10 Akzo Nobel Nv Geschoßfangvorrichtung
DE202007009864U1 (de) 2007-07-14 2008-11-20 Silikon-Technik Gmbh & Co. Kg 2D-oder 3D-Zielobjekt, insbesondere für Bogen-, Armbrust- oder Dartpfeile
PL240183B1 (pl) * 2019-07-15 2022-02-28 Krzysztof Kasendra Bloczek balistyczny GR

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE75836C (de) * J. MEISTER in Leipzig, Berlinerstrafse 86 Kugelfang bezw. Panzer aus mit zähen Stoffen (Theer, Pech, Asphalt, Lehm, Sand) gefüllten Behältern
DE1578238A1 (de) * 1967-02-27 1971-07-29 Chem Fab Gustav Drengwitz Kugelfangmasse
US4317572A (en) * 1979-12-13 1982-03-02 Laspo Ag Firing butt including a housing for a target
DE3212781A1 (de) * 1982-04-06 1983-10-06 Gfl Sportstaettenbau Gmbh Kugelfang, insbesondere fuer solche schiessanlagen, die in geschlossenen raeumen angelegt sind
DE3418626A1 (de) * 1984-05-18 1985-11-28 Allen Stefan Dipl.-Ing. 4000 Düsseldorf Wojcinski Schichtfolge zur abprallsicherung
DE3442984A1 (de) * 1984-11-26 1986-05-28 Karl 5450 Neuwied Henseler Geschossfang fuer schiessanlagen
US4773653A (en) * 1987-01-20 1988-09-27 Linatex Corporation Of America Cover for ballistic target assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108858941A (zh) * 2018-06-28 2018-11-23 星际控股集团有限公司 一种收弹筒及其制作工艺

Also Published As

Publication number Publication date
DE3839000A1 (de) 1990-05-23
DE58908007D1 (de) 1994-08-11
ATE108270T1 (de) 1994-07-15
EP0369401A2 (fr) 1990-05-23
EP0369401A3 (fr) 1991-03-20
ES2061892T3 (es) 1994-12-16

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