GB2192236A - Explosives applicator - Google Patents
Explosives applicator Download PDFInfo
- Publication number
- GB2192236A GB2192236A GB08714738A GB8714738A GB2192236A GB 2192236 A GB2192236 A GB 2192236A GB 08714738 A GB08714738 A GB 08714738A GB 8714738 A GB8714738 A GB 8714738A GB 2192236 A GB2192236 A GB 2192236A
- Authority
- GB
- United Kingdom
- Prior art keywords
- applicator
- explosive material
- nozzle
- explosive
- barrel
- 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.)
- Withdrawn
Links
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
- B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
- B05C17/0116—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like characterised by the piston driving means
- B05C17/012—Stepwise advancing mechanism, e.g. pawl and ratchets
- B05C17/0123—Lever actuated
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Apparatus for dispensing an extrudable mixture of an explosive containing a binder/plasticiser is disclosed. <IMAGE>
Description
SPECIFICATION
Extrusion of explosive materials
The present invention relates to the extrusion of explosive materials.
Explosive materials are used in a range of military and commerical applications. Such materials often comprise a plastic bonded explosive composition in which a polymeric binder material is intimately mixed together with one or more solid powdered granular explosive compounds optionally together with one or more additives such as plasticisers, stabilisers and catalysts. Such plastic bonded materials are normally made by mixing the ingredients together and then extruding, casting or moulding them into a desired shape. Where the material is extruded the extrusion is normally carried out as å mass production process using factory installed extrusion machines. The product is often extruded in the form of a strip which may be cut to size either at the site of manufacture or by the user.Such extruded materials are normally supplied to the user as rubbery or plastic solids which are applied in that form by the user to the object to be treated, e.g. on the surface of a metal or other structure to be cut explosively.
The disadvantage of explosive materials which are extruded plastic bonded explosives made and used generally in the manner described above is that the range of applications of such materials is limited by the form in which the material is manufactured and supplied.
According to the present invention there is provided a hand held explosive applicator comprising a barrel or tube containing a charge of extrudable explosive material and a nozzle for extruding said explosive material.
The barrel or tube and the nozzle may each independently be made of a plastics material or a suitable lightweight metal, e.g. an aluminium alloy.
The explosive material may be contained directly within the barrel or tube or within a perforable container, e.g. of thin plastics, paper, metal foil, metallised plastic foil or the like, contained in the barrel or tube.
The applicator may additionally include means for pushing the explosive material to extrude it through the nozzle.
The means for pushing the explosive material may for example comprise a simple handfi operated plunger which, in operation, displaces the explosive material through the nozzle. Alternatively it may comprise a plunger depressed by more -elaborate structure, e.g. a trigger operated mechanism similar to that commonly employed in a grease gun used in greasing components in automobile and other engineering applications.
The explosives applicator according to the present invention beneficially allows extrudable explosives to be applied to an object of interest in ways which are not possible in the prior art. Thus, explosive materials may be applied for example as unusual shapes on the object of interest or into shaped cavities within the object. The manner of application resembles the formation of decorative icing patterns on a cake. In other words, the shape of the explosive material as applied to the object of interest is determined at the point of use directly by the applicator. As the extruded material may be in soft tacky form its application and its adhesion to the object of interest is carried out more conveniently than with prior art materials which often require special steps, e.g. bonding or taping to be taken to apply the material to the object.
There are a variety of known classes of explosive materials and it will be readily appreciated by those skilled in the explosives art that many of the members of these classesmay be extruded by the applicator according to the present invention. Especially preferred materials in such materials as highly energetic fuels are nitramines such as RDX (cyclo-1,3,5- trimethylene-2,4,6-trinitramine) and/or HMX (cyclo-1 ,3,5,7-tetramethylene-2,4,6,8-tetranitramine) mixed together a suitable binder/plasticiser system providing suitable physical properties. There are a variety of binders and plasticisers well known to those skilled in the art but chemically cross-linked polyurethanes plasticised with di-alkyl phthalates are widely used.Suitable compositions comprise 75 to 90% by weight highly energetic fuel together with 25 to 10by6 binder/plasticiser the plasticiser content being sufficient to give, at room temperature (20"C), appropriate extrudability (determined in each case by the other components of the composition).
Preferably the extruded composition comprises 86 per cent by weight of RDX and 14 per cent by weight of plasticiser.
An embodiment of the present invention will now be described by way of example with reference to the accompanying drawing, in which:
Figure 1 is a partly cross-sectional side elevation of an applicator embodying the present invention.
In Fig. 1 a charge 1 of extrudable explosive material is contained in a plastics barrel 3 of the applicator shown. The explosive material has been previously filled into the front end of the barrel 3 which has been subsequently closed by a head 5 attached to a neck 6 of the barrel 3 by a screw thread 7. The head 5 is hollow and includes a tapering tubular nozzle 9.
The rear end of the barrel 3 is closed by a plastics piston 11 which is slidable within the barrel toward the head 5. The piston 11 may be pushed by a plunger comprising a disc 13 and a rod 15. The rod 15 is pushed forward against the action of a spring 16 by a lever 17 operated by a hand operated trigger 19 attached to -a fixed grip 21. A frame 23 attached to the grip 21 holds together in a fixed relationship the barrel 3 and the grip 21.
In operation, when the trigger 19 is depressed the piston 11 is pushed toward the nozzle causing explosive material of the charge 1 to be extruded through the nozzle 9.
If the nozzle is made of relatively soft material, e.g. polyethylene, it may be cut by the user to provide a suitable extrusion diameter.
Claims (7)
1. A hand held explosives applicator comprising a barrel or tube containing a charge of extrudable explosive material and a nozzle for extruding said explosive material
2. An applicator as claimed in claim 1 and wherein the barrel or tube and the nozzle each independently made of plastics material or a lightweight metal.
3. An applicator as claimed in claim 1 or claim 2 and wherein the applicator may additionally include means for pushing the explosive material to extrude it through the nozzle.
4. An applicator as claimed in claim 3 and wherein the means for pushing the explosive material comprises a hand operated plunger which, in operation, displaces the explosive material through the nozzle:
5. An applicator as claimed in claim 3 and wherein the plunger is arranged to be depressed by a trigger operated mechanism.
6. An applicator as claimed in any one of the preceding claims and wherein the explosive material comprises 86 per cent by weight of RDX and 14 per cent by weight of plasticiser.
7. An applicator substantially as described herein with reference to the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB868615152A GB8615152D0 (en) | 1986-06-20 | 1986-06-20 | Extrusion of explosive materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8714738D0 GB8714738D0 (en) | 1987-07-29 |
| GB2192236A true GB2192236A (en) | 1988-01-06 |
Family
ID=10599841
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB868615152A Pending GB8615152D0 (en) | 1986-06-20 | 1986-06-20 | Extrusion of explosive materials |
| GB08714738A Withdrawn GB2192236A (en) | 1986-06-20 | 1987-06-22 | Explosives applicator |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB868615152A Pending GB8615152D0 (en) | 1986-06-20 | 1986-06-20 | Extrusion of explosive materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8615152D0 (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2582156A (en) * | 1948-03-20 | 1952-01-08 | Wilbur P Peterson | Dispensing apparatus and cartridge therefor |
| US2629517A (en) * | 1951-07-18 | 1953-02-24 | David N Slobin | Caulking gun with attaching means for replaceable carton |
| GB703780A (en) * | 1951-06-15 | 1954-02-10 | Secomastic Ltd | Improvements in or relating to extrusion devices |
| GB751332A (en) * | 1953-10-31 | 1956-06-27 | Otto Baier | An improved sliding roof for vehicles |
| GB782365A (en) * | 1954-10-06 | 1957-09-04 | Kelsey Ind Ltd | Improvements in or relating to extrusion guns for mastic substances |
| GB886779A (en) * | 1960-04-07 | 1962-01-10 | R C Can Co | Caulking cartridge, spout type, end closure |
| GB905049A (en) * | 1957-09-27 | 1962-09-05 | B B Chem Co Ltd | Improvements in or relating to portable extrusion devices |
| EP0083802A2 (en) * | 1982-01-11 | 1983-07-20 | Teroson GmbH | Process for emptying a cartridge-like container, and container for carrying out the process |
| GB2117057A (en) * | 1982-03-19 | 1983-10-05 | Polycell Prod Ltd | Dispensing viscous material from flexible walled tubes |
| GB2181490A (en) * | 1985-10-10 | 1987-04-23 | Cox Newbury Ltd | Dispensers for viscous materials |
-
1986
- 1986-06-20 GB GB868615152A patent/GB8615152D0/en active Pending
-
1987
- 1987-06-22 GB GB08714738A patent/GB2192236A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2582156A (en) * | 1948-03-20 | 1952-01-08 | Wilbur P Peterson | Dispensing apparatus and cartridge therefor |
| GB703780A (en) * | 1951-06-15 | 1954-02-10 | Secomastic Ltd | Improvements in or relating to extrusion devices |
| US2629517A (en) * | 1951-07-18 | 1953-02-24 | David N Slobin | Caulking gun with attaching means for replaceable carton |
| GB751332A (en) * | 1953-10-31 | 1956-06-27 | Otto Baier | An improved sliding roof for vehicles |
| GB782365A (en) * | 1954-10-06 | 1957-09-04 | Kelsey Ind Ltd | Improvements in or relating to extrusion guns for mastic substances |
| GB905049A (en) * | 1957-09-27 | 1962-09-05 | B B Chem Co Ltd | Improvements in or relating to portable extrusion devices |
| GB886779A (en) * | 1960-04-07 | 1962-01-10 | R C Can Co | Caulking cartridge, spout type, end closure |
| EP0083802A2 (en) * | 1982-01-11 | 1983-07-20 | Teroson GmbH | Process for emptying a cartridge-like container, and container for carrying out the process |
| GB2117057A (en) * | 1982-03-19 | 1983-10-05 | Polycell Prod Ltd | Dispensing viscous material from flexible walled tubes |
| GB2181490A (en) * | 1985-10-10 | 1987-04-23 | Cox Newbury Ltd | Dispensers for viscous materials |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8615152D0 (en) | 1986-11-26 |
| GB8714738D0 (en) | 1987-07-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |