US20040244626A1 - Propellant charge batch in particular for bolt setting tools - Google Patents

Propellant charge batch in particular for bolt setting tools Download PDF

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Publication number
US20040244626A1
US20040244626A1 US10/851,370 US85137004A US2004244626A1 US 20040244626 A1 US20040244626 A1 US 20040244626A1 US 85137004 A US85137004 A US 85137004A US 2004244626 A1 US2004244626 A1 US 2004244626A1
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US
United States
Prior art keywords
propellant charge
chamber
propellant
batch
nitrocellulose
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.)
Abandoned
Application number
US10/851,370
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English (en)
Inventor
Gerhard Ehmig
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Assigned to HILTI AKTIENGESELLSCHAFT reassignment HILTI AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EHMIG, GERHARD
Publication of US20040244626A1 publication Critical patent/US20040244626A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F42B5/16—Cartridges, i.e. cases with charge and missile characterised by composition or physical dimensions or form of propellant charge, with or without projectile, or powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/16—Cartridges specially adapted for impact tools; Cartridge and bolts units
    • B25C1/163—Cartridges
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
    • C06B45/12—Compositions or products which are defined by structure or arrangement of component of product having contiguous layers or zones

Definitions

  • the present invention relates to a propellant charge batch for explosion-operated setting tool and including a socket member the inner space of which is filled with a propellant charge, and at least one ignition element.
  • the propellant charge batches of the type described above are formed, e.g., as cartridges or blisters filled with a powdered propellant charge.
  • the propellant charge batches of the above-described type are used in, e.g., bolt setting tools and serve as drive means for the tool drive piston.
  • a propellant charge batch of the above-described type is disclosed, e.g., in a German Publication DE-39 10 392 A1.
  • the propellant charge is located in a hollow space of a cartridge-shaped receptacle, with the ignition element being located in a sidewise recess formed in the receptacle.
  • the most favorable propellant charge component is ammoniumnitrate which, after being consumed in the setting tool, does not release any toxins and releases only gaseous reaction products.
  • the drawback of the ammoniumnitrate consists in that it is highly hygroscopic.
  • U.S. Pat. No. 3,753,810 discloses a shelled propellant powder on basis of nitrocellulose and ammoniumnitrate. With this propellant powder, the grains or granules are provided, for protection against moisture, with a nitrocellulose outer coating containing at least aluminum in a powder form. The method of manufacturing such a propellant charge is very expensive, which makes the powder very expensive.
  • an object of the present invention is to provide a propellant charge batch of the type discussed above, e.g., such as a cartridge in which the drawbacks of the prior art are eliminated.
  • a propellant charge batch having a socket member in an inner space of which there are provided a first chamber filled with a nitrocellulose propellant charge, and a second chamber filled with ammoniumnitrate powder, with at least the second chamber being closed medium tightly, and ignition means for igniting the propellant charge.
  • the nitrocellulose propellant can be in a pasty, granular, powder, fiber or the like form and can include or not include different additives such as, e.g., nitroglycerine.
  • the nitrocellulose propellant which is contained in the propellant charge batch or cartridge is easily ignited, and its amount is so adapted to the ammoniumnitrate powder that, advantageously, a neutral oxygen balance is achieved. This is energetically advantageous and prevents an eventual corrosion of the tool which could result from an excess of oxygen. Because the ammoniumnitrate powder is separated from the nitrocellulose propellant, the ignition of the nitrocellulose powder is not affected by an undefined distribution of the ammoniumnitrate powder in the nitrocellulose propellant. Further, the separation of the ammoniumnitrate powder from the nitrocellulose propellant insures a predetermined filling of the propellant charge batch or the cartridge during manufacturing.
  • the change of the volume of the ammoniumnitrate as a result of a phase change becomes irrelevant because the grains of the nitrocellulose are not affected due to the separation of the ammoniumnitrate and the nitrocellulose propellant.
  • the separation of the ammoniumnitrate and the nitrocellulose propellant provides for a complete water-tight packing of the ammoniumnitrate.
  • the harmful hygroscopicity of the ammoniumnitrate also becomes irrelevant.
  • both chambers are arranged one after another in the axial direction of the socket member.
  • the ignition means is arranged in the region of the bottom of the propellant charge batch, with the nitrocellulose propellant being located in the chamber which is adjacent to the ignition means, and ammoniumnitrate powder being located in the frontmost chamber remote from the ignition means.
  • the ignition means, the nitrocellulose propellant, and the ammoniumnitrate form an ignition chain.
  • the ignition condition for the ammoniumnitrate are particular good for ammoniumnitrate with the present invention. 200 J of an ignition energy provide for a temperature of about 2,500° C., a pressure of about 100 bar, and a high flow velocity.
  • the mixture of a combusting nitrocellulose propellant and ammoniumnitrate is intermixed during the combustion for a long time, e.g., in a swirl chamber.
  • An extended intermixing favorably influences the combustion process.
  • the combustion volume is maintained substantially constant. The combustion with a substantially constant volume and a high propellant density is very favorable for conversion of the entire propellant charge.
  • the two chambers are separated from each other by a separating element. This simplifies the manufacturing process and, thus, facilitate the production of the inventive propellant charge batch.
  • the separating element is formed as a disc-shaped element of a nitrocellulose board. Because the nitrocellulose board is combustible, no problem associate with a possible residue of the separation element exists.
  • the propellant charge batch is formed as a blister or a blister cartridge, i.e., the socket member is formed of a blister film or foil.
  • the formation of the batch of the blister film insures a cost-effective manufacturing of the batches.
  • Another advantage of using a blister film consists in that the film is easily opened by the propellant upon combustion.
  • the separation element is formed as a cup-shaped element of a film material, e.g., a blister film or foil.
  • This separation element is particularly suitable for use in a blister cartridge, as the socket member and the separating element can be welded or glued to each other in their end regions, which insures a proper sealing of the two chambers relative to each other.
  • FIG. 1 a longitudinal cross-sectional view of a first embodiment of a propellant charge batch according to the present invention.
  • FIG. 2 a longitudinal cross-sectional view of a second embodiment of a propellant charge batch according to the present invention.
  • a propellant charge batch according the present invention which is shown in FIG. 1, is formed as a socket member 10 the inner space of which is divided in two chambers 11 , 12 .
  • a propellant charge, which is contained in the propellant charge batch consists of nitrocellulose means 13 , e.g., a nitrocellulose powder, which is located in the chamber 11 , and an ammoniumnitrate powder 14 which is located in the chamber 12 .
  • the chambers 11 and 12 are arranged one after another in an axial direction 20 , with the chamber 11 being limited by the bottom 17 of the propellant charge batch.
  • the socket member 10 is closed, preferably, by a medium/liquid tight cover 18 .
  • both the socket 10 and the socket cover 18 are formed of a plastic material. However, they also can be formed of metal or any other suitable material. It should be understood that the graininess of the ammoniumnitrate can vary from fine-grained to coarse-grained.
  • the socket member 10 is provided with a salient edge region 19 with which the propellant charge batch can be supported on flanks of a cartridge support of a setting tool (not shown).
  • ignition means 15 is located in the empty space of the salient edge region.
  • the two chambers 11 , 12 are separated from each other, in the embodiment shown in the drawing, by a medium tight separating element 16 . 1 formed, in the embodiment shown in FIG. 1, as a plate cut out from a nitrocellulose board.
  • the nitrocellulose propellant means 13 is ignited. With the ignition of the nitrocellulose propellant means 13 , the separating plate 16 . 1 is teared open and is pressed back. The separating plate 16 . 1 takes part in the combustion and is completely consumed, so that no residue remains. As a result of the pressure of combustion, the propellant charge batch or cartridge opens in its front region, so that the ammoniumnitrate powder 14 becomes mixed with a remaining nitrocellulose propellant means 13 , which results in an optimal combustion of the propellant charge.
  • the intermixing of the ammoniumnitrate powder 14 with the remaining portion of the nitrocellulose propellant means 13 is enhanced by providing in the setting tool, downstream of the cartridge support, of a swirl chamber.
  • the combustion is effected without release of toxic substances and without formation of slag.
  • the ammoniumnitrate powder 14 is protected from penetration of moisture as a result of the chamber 12 being closed.
  • the propellant charge batch shown in FIG. 2 differs from that of FIG. 1, in that the socket member 10 is formed of a rigid plastic film (blister foil).
  • the socket cover 18 is formed of a thin foil that can be, optionally, metal-plated.
  • the separating element 16 . 2 which separates the chamber 11 with the nitrocellulose propellant means 13 and the chamber 12 with the ammoniumnitrate powder 14 , is formed of a cup-shaped blister foil having an edge region that overlaps the edge region 19 of the socket member 10 and is welded or glued thereto.
  • the ignition means 15 is located separately. Upon ignition of the propellant charge batch, the ignited nitrocellulose bursts the films, which form the separating element 16 .
  • the nitrocellulose propellant means 13 intermixes subsequently with the ammoniumnitrate powder 14 , with the mixture having been completely combusted, without leaving any toxic reaction products.
  • a cartridge according to the present invention can be also formed as a one-piece element, with the socket member having an integral bottom and with the front socket opening of the cartridge being closed and sealed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US10/851,370 2003-05-24 2004-05-21 Propellant charge batch in particular for bolt setting tools Abandoned US20040244626A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10323531.0 2003-05-24
DE10323531A DE10323531B3 (de) 2003-05-24 2003-05-24 Treibladungssatz, insbesondere für Bolzensetzgeräte

Publications (1)

Publication Number Publication Date
US20040244626A1 true US20040244626A1 (en) 2004-12-09

Family

ID=33394785

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/851,370 Abandoned US20040244626A1 (en) 2003-05-24 2004-05-21 Propellant charge batch in particular for bolt setting tools

Country Status (5)

Country Link
US (1) US20040244626A1 (xx)
CN (1) CN100448621C (xx)
DE (1) DE10323531B3 (xx)
FR (1) FR2855088A1 (xx)
ZA (1) ZA200403924B (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110146520A1 (en) * 2008-06-16 2011-06-23 Rheinmetall Waffe Munition Gmbh Flare with flare ignition and ejector mechanism for the same
US20110174182A1 (en) * 2008-06-16 2011-07-21 Rheinmetall Waffe Munition Gmbh Activation unit for munition-free decoys
US8689693B2 (en) 2009-06-26 2014-04-08 Rheinmetall Waffe Munition Gmbh Active body
US8714089B2 (en) 2009-05-08 2014-05-06 Rheinmetall Waffe Munition Gmbh Activation unit for explosive masses or explosive bodies
US8763533B2 (en) 2009-06-26 2014-07-01 Rheinmetall Waffe Munition Gmbh Active body
CN104690690A (zh) * 2013-12-10 2015-06-10 崴钢工业有限公司 火药钉

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2445570C2 (ru) * 2010-01-18 2012-03-20 Федеральное казенное предприятие "Государственный научно-исследовательский институт химических продуктов" (ФКП "ГосНИИХП") ЗАРЯД ДЛЯ ПИСТОЛЕТНОГО 9 мм ПАТРОНА
CN105378216A (zh) * 2013-08-27 2016-03-02 哈利伯顿能源服务公司 用于钻探井筒的封装炸药
CN105014611B (zh) * 2015-08-12 2016-11-09 南溪南山设备制造有限公司 一种塑壳火药固定推进系统及其紧固件和加工工艺
CN109945231A (zh) * 2017-12-20 2019-06-28 中国石油天然气集团公司 一种自燃点火装置及利用其进行自燃点火的方法

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329503A (en) * 1918-07-22 1920-02-03 Du Pont Container for explosives
US1690890A (en) * 1926-11-30 1928-11-06 Geynst Maurice De Blank cartridge
US2974592A (en) * 1956-03-15 1961-03-14 Olin Mathieson Cartridge
US3372643A (en) * 1966-02-01 1968-03-12 United Shoe Machinery Corp Low explosive primerless formed charges
US3753810A (en) * 1971-04-06 1973-08-21 Mini Defense Nh{11 no{11 -nitrocellulose coated with nitrocellulose and al
US3828676A (en) * 1973-01-18 1974-08-13 R Junker Consumable explosive cartridges
US3994201A (en) * 1973-08-01 1976-11-30 Dynamit Nobel Aktiengesellschaft Separating element
US4593622A (en) * 1983-09-23 1986-06-10 Dynamit Nobel Aktiengesellschaft Industrial cartridge with separated deflagrating components
US4856433A (en) * 1987-07-13 1989-08-15 Scot, Incorporated Initiator device with adiabatic compression ignition
US5216200A (en) * 1990-12-07 1993-06-01 Dynamit Nobel Aktiengesellschaft Device for igniting a propellant charge, a cartridge for the charge and a magazine for holding cartridges, especially for stud setting or driving tools
US5279201A (en) * 1991-07-24 1994-01-18 Dynamit Nobel Aktiengesellschaft Plastic cartridge and plastic cartridge-belt magazine
US5433147A (en) * 1993-03-12 1995-07-18 Dynamit Nobel Aktiengesellschaft Ignition device
US5633476A (en) * 1992-10-13 1997-05-27 Cioffe; Anthony Method of making a propellant and explosive composition
US6053108A (en) * 1998-01-13 2000-04-25 Senco Products, Inc. Propellant strip assembly and propellant charge structure

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR861158A (fr) * 1939-03-17 1941-02-03 Ruggieri Ets Dispositif pour l'inflammation de substances très combustibles enfermées dans un récipient clos
DE1571261A1 (de) * 1966-08-05 1971-03-18 Dynamit Nobel Ag Treibkartusche,insbesondere fuer Geraete zur gewerblichen Nutzung wie Bolzensetzgeraete od.dgl.
CH537784A (fr) * 1971-02-25 1973-06-15 Etem Ets Munition à charge propulsive
CN86100451B (zh) * 1986-01-20 1988-03-09 华东工学院 燃速压力响应小的新型固体燃气发生剂
DE3910392A1 (de) * 1989-03-31 1990-10-04 Hilti Ag Bandfoermiger ladestreifen

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329503A (en) * 1918-07-22 1920-02-03 Du Pont Container for explosives
US1690890A (en) * 1926-11-30 1928-11-06 Geynst Maurice De Blank cartridge
US2974592A (en) * 1956-03-15 1961-03-14 Olin Mathieson Cartridge
US3372643A (en) * 1966-02-01 1968-03-12 United Shoe Machinery Corp Low explosive primerless formed charges
US3753810A (en) * 1971-04-06 1973-08-21 Mini Defense Nh{11 no{11 -nitrocellulose coated with nitrocellulose and al
US3828676A (en) * 1973-01-18 1974-08-13 R Junker Consumable explosive cartridges
US3994201A (en) * 1973-08-01 1976-11-30 Dynamit Nobel Aktiengesellschaft Separating element
US4593622A (en) * 1983-09-23 1986-06-10 Dynamit Nobel Aktiengesellschaft Industrial cartridge with separated deflagrating components
US4856433A (en) * 1987-07-13 1989-08-15 Scot, Incorporated Initiator device with adiabatic compression ignition
US5216200A (en) * 1990-12-07 1993-06-01 Dynamit Nobel Aktiengesellschaft Device for igniting a propellant charge, a cartridge for the charge and a magazine for holding cartridges, especially for stud setting or driving tools
US5279201A (en) * 1991-07-24 1994-01-18 Dynamit Nobel Aktiengesellschaft Plastic cartridge and plastic cartridge-belt magazine
US5633476A (en) * 1992-10-13 1997-05-27 Cioffe; Anthony Method of making a propellant and explosive composition
US5433147A (en) * 1993-03-12 1995-07-18 Dynamit Nobel Aktiengesellschaft Ignition device
US6053108A (en) * 1998-01-13 2000-04-25 Senco Products, Inc. Propellant strip assembly and propellant charge structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110146520A1 (en) * 2008-06-16 2011-06-23 Rheinmetall Waffe Munition Gmbh Flare with flare ignition and ejector mechanism for the same
US20110174182A1 (en) * 2008-06-16 2011-07-21 Rheinmetall Waffe Munition Gmbh Activation unit for munition-free decoys
US8695504B2 (en) 2008-06-16 2014-04-15 Rheinmetall Waffe Munition Gmbh Activation unit for munition-free decoys
US8770109B2 (en) 2008-06-16 2014-07-08 Rheinmetall Waffe Munition Gmbh Flare with flare ignition and ejector mechanism for the same
US8714089B2 (en) 2009-05-08 2014-05-06 Rheinmetall Waffe Munition Gmbh Activation unit for explosive masses or explosive bodies
US8689693B2 (en) 2009-06-26 2014-04-08 Rheinmetall Waffe Munition Gmbh Active body
US8763533B2 (en) 2009-06-26 2014-07-01 Rheinmetall Waffe Munition Gmbh Active body
CN104690690A (zh) * 2013-12-10 2015-06-10 崴钢工业有限公司 火药钉

Also Published As

Publication number Publication date
FR2855088A1 (fr) 2004-11-26
DE10323531B3 (de) 2005-02-10
CN1572431A (zh) 2005-02-02
CN100448621C (zh) 2009-01-07
ZA200403924B (en) 2005-05-20

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HILTI AKTIENGESELLSCHAFT, LIECHTENSTEIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:EHMIG, GERHARD;REEL/FRAME:015373/0565

Effective date: 20040507

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION