EP1717539A1 - Méthode de fabrication d'une culasse d'arme à feu - Google Patents

Méthode de fabrication d'une culasse d'arme à feu Download PDF

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Publication number
EP1717539A1
EP1717539A1 EP06008184A EP06008184A EP1717539A1 EP 1717539 A1 EP1717539 A1 EP 1717539A1 EP 06008184 A EP06008184 A EP 06008184A EP 06008184 A EP06008184 A EP 06008184A EP 1717539 A1 EP1717539 A1 EP 1717539A1
Authority
EP
European Patent Office
Prior art keywords
green compact
green
sintering
slide
sprue
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06008184A
Other languages
German (de)
English (en)
Other versions
EP1717539B1 (fr
Inventor
Wulf-Heinz Pflaumer
Daniel Rieger
Franz Wonisch
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.)
Umarex GmbH and Co KG
Original Assignee
Umarex Sportwaffen GmbH and Co KG
Umarex GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=36676436&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1717539(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Umarex Sportwaffen GmbH and Co KG, Umarex GmbH and Co KG filed Critical Umarex Sportwaffen GmbH and Co KG
Publication of EP1717539A1 publication Critical patent/EP1717539A1/fr
Application granted granted Critical
Publication of EP1717539B1 publication Critical patent/EP1717539B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F41A3/36—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49885—Assembling or joining with coating before or during assembling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material

Definitions

  • the present invention relates to methods of making a closure carriage of a firearm.
  • the assembly also contains the firing pin, which causes the ignition of the cartridge, and various security systems.
  • Lateral guide slots in the closure slide allow a forward and backward movement and an opening and closing of the closure.
  • the opening can be done either manually by hand or semi-automatically on the ignited cartridge. The latter is typical of the self-loading principle.
  • the ignited cartridge opens the closure by the gas discharge taking place and the cartridge case is pulled out of the cartridge chamber by means of an extractor lever and catapulted out through the ejection window.
  • the spring-back-fasting, ie re-closing, slide carriage takes the next cartridge out of the magazine on its way and guides it to the chamber in the assembly run.
  • the shutter slide must therefore be able to absorb the sudden forces through the ignited cartridge.
  • the main requirements are tensile strength, toughness, hardness and a certain impact resistance.
  • the thermal loads are also very high at fast firing changes.
  • the area which is subjected to the heaviest load is referred to as the impact floor, since here the sleeve is supported during the ignition.
  • the problem underlying the present invention is the specification of a method of the type mentioned, which allows a cost-effective production of a closure slide.
  • Basis of the starting material are very fine powders. They usually have spherical particles to form the lowest possible resistance in the subsequent flow process in the tool. Usually, the particle size is less than 45 microns, but varies depending on the type of powder used.
  • For the actual production of the powder use is made of chemical processes or atomization with inert gases. Analogous to other powder metallurgical processes, it is also possible to use pure, alloyed, but also mixed powder as the starting material in the production of powders for metal powder injection molding. This opens up the possibility of using a relatively broad range of materials whose properties are largely quite different. The use of mixed powders with ceramic content or attached fiber materials is conceivable.
  • the subsequent process step is the mixing of the powder with the organic binder.
  • the aim here is to achieve a homogeneous mixing of all constituents in order to have homogeneous properties in the later component. This is particularly important in the debindering process and the subsequent sintering, as this can achieve a uniform shrinkage over the entire component.
  • the mixing ratio of powder and binder is usually around a ratio of 60 vol .-% to 40 vol .-%.
  • the aim is to fill in the spaces between the powder particles without increasing their distance from each other.
  • the binder wets the surface of the powder particles and destroys existing agglomerates formed by the use of very fine powders.
  • the entire process takes place at temperatures above the melting temperature of the binder and is usually carried out in mixers, kneaders or extruders.
  • the resulting homogeneous mass is referred to as a feedstock. It is finally processed into a pourable granulate, which simplifies transport and storage.
  • the granules also offer the possibility to use it in commercially available injection molding machines.
  • the molding of the feedstock takes place during metal injection molding by injection molding.
  • Commercially available injection molding machines are used, which are optionally equipped with wear-protected cylinder units.
  • the process is analogous to the injection molding of plastics.
  • Through the screw and an external tempering the plasticization of the feedstock takes place. Common pressures for pressing into the mold are between 500 and 2000 bar.
  • About ejector pins the component can be pressed out of the cavity and removed. The result is the green compact, which is very sensitive to distortion and can already be deformed by small forces until the final cooling. Careful handling is the top priority here.
  • the green body has a sprue bar corresponding to the sprue and one or more runner channels when it is removed from the injection mold.
  • the next step is debinding.
  • debinding thus one calls the process, with which the organic portion, thus the binder, from the
  • the individual organic substances are vaporized by a defined heating from the green compact.
  • the solvent debinder works with a solvent, such as acetone, which dissolves the organic components from the green compact.
  • An insoluble binder component further ensures the cohesion of the structure and evaporates during the subsequent sintering process.
  • the catalytic debinding works analogously to the solvent debinding, but the organic components are not dissolved, but decomposed catalytically into easily evaporable fractions. These then evaporate in the subsequent sintering process.
  • the intermediate product obtained after debindering is an extremely porous shaped body which is merely held together by a residual binder content of about ten percent of the original amount. These shaped bodies are also called brownlings.
  • the residual binder finally evaporates completely in the subsequent sintering process.
  • Modern conveyor systems can combine debindering and sintering so that a smooth transition between the two processes can occur.
  • the sintering process is the most know-how intensive of the entire metal powder injection molding process.
  • the Braunling is at temperatures below the melting point compacted the used alloy into a compact body. So there is a heat treatment with a solid phase. Any existing residual binder shares are also evaporated in this course.
  • the heat treatment is carried out in special high-temperature furnaces under a protective gas atmosphere or in a vacuum.
  • the resulting shrinkage process is dependent on the composition of the feedstock used and is usually between 10% and 20% based on the initial dimensions of the green or brown. The result is a component with a final density above 96% of the theoretical density.
  • the green compact is cooled slowly, in particular in a period of time between 10 and 25 minutes.
  • the slow cooling can prevent the formation of stresses in the green compact which could lead to cracks and distortions in the green body or later during sintering to cracks and distortions in the closure sled.
  • different parts of the green compact have the same or a temperature only so different that no cracks and / or distortions occur in the green body during cooling.
  • the uniform cooling can contribute to the prevention of cracks and distortion.
  • a continuous furnace large quantities of green compacts can be cooled simultaneously, so that the use of such a continuous furnace in series production is suitable.
  • the green compact is cooled in an oil bath or in contact with heated parts, in particular metal parts. Such a method may well be useful for small quantities.
  • the green compact can have a sprue bar and at least one sprue channel when removed from the injection mold.
  • the debindering is carried out as catalytic debinding, in particular in a nitrogen atmosphere with the addition of nitric acid.
  • the sprue bar and / or the at least one sprue remains until after the sintering of the brown compact on the closure sled to be manufactured.
  • the at least one runner substantially contributes to the stabilization of the green body or the brown, so that in the sintering Danger of cracks or unwanted deformations can be significantly reduced.
  • the sprue bar is removed prior to sintering the brownbody and inserted into a bore in the closure slide to be manufactured to serve as a support in this bore during sintering. Due to the fact that the sprue bar was made of the same material under the same conditions as the rest of the Braunling, it has the same shrinkage properties during the sintering process and can therefore be optimally used for support. At the same time, the sprue bar is used as a typical waste part.
  • a typical shutter slide 1 can be seen, which is produced by a method according to the invention.
  • the shutter slide 1 has, in a central region, an ejection window 2 through which the empty cartridge case is ejected during the movement of the closure slide 1 due to the firing of a shot.
  • the closure slide is provided in each case with different reference numerals 1, 3, 4 in FIGS. 1 to 4, because different stages of the production process are illustrated in the figures.
  • reference numeral 1 the finished sintered slide, with the reference numeral 2 of the green compact after spraying and designated by the reference numeral 3 Braunling before sintering.
  • the figures do not take into account that the closing slide shrinks during the transition from green to brown and to the final sintered product.
  • 100Cr6 is used as the raw material for spraying the greenware 3.
  • the green compact 3 is held on the sprue bar 5 (see FIGS. 2 and 3) and removed from the injection mold (not shown).
  • FIGS. 2 and 3 show these green bodies 3 taken from the injection mold. These illustrations show that two sprue channels 6 extend from the sprue bar 5 in the longitudinal direction of the green body 3 through the ejection window 2.
  • the green compact 3 is cooled in a continuous furnace from about 100 ° C to about room temperature over about 15 to 20 minutes.
  • the continuous furnace ensures a cooling of all parts of the green body 3 at about the same speed.
  • the green compact 3 After cooling, the green compact 3 is catalytically removed by treatment with nitric acid in a nitrogen atmosphere to a Braunling 4.
  • the sprue bar 5 can either be solved directly after spraying of the green body 3, for example, broken off, or be solved by the Braunling 4 after cooling or only after debindering.
  • closure slide 1 or the greenware 3 and the browning 4 have a bore 7 for receiving the firing pin of the firearm to be fitted with the closure slide 1. So that the bore 7 surrounding parts of the Braunlings 4 supported during sintering be, the broken sprue bar 5 is introduced into the bore 7.
  • the sprue channels 6 extending through the ejection window 2 in the longitudinal direction of the closure carriage 1 or of the brown body 4 are left on the Braunling 4 during the sintering in order to give it additional stability.
  • the sprue channels 6 are removed after completion of the sintering, for example by milling, so that the ejection window 2 is exposed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Powder Metallurgy (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
EP06008184A 2005-04-26 2006-04-20 Méthode de fabrication d'une culasse d'arme à feu Revoked EP1717539B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005019630 2005-04-26

Publications (2)

Publication Number Publication Date
EP1717539A1 true EP1717539A1 (fr) 2006-11-02
EP1717539B1 EP1717539B1 (fr) 2008-11-05

Family

ID=36676436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06008184A Revoked EP1717539B1 (fr) 2005-04-26 2006-04-20 Méthode de fabrication d'une culasse d'arme à feu

Country Status (5)

Country Link
US (1) US7731894B2 (fr)
EP (1) EP1717539B1 (fr)
AT (1) ATE413579T1 (fr)
DE (1) DE502006001973D1 (fr)
RU (1) RU2427450C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT510291B1 (de) * 2011-04-04 2012-03-15 Wilhelm Bubits Pistole mit mehrteiligem laufschlitten
WO2013113880A1 (fr) 2012-02-02 2013-08-08 Basf Se Matière thermoplastique pom
WO2014170242A1 (fr) 2013-04-18 2014-10-23 Basf Se Copolymères de polyoxyméthylène et composition de pom thermoplastique
US10961384B2 (en) 2014-05-21 2021-03-30 Basf Se Process for improving the flexural toughness of moldings

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD594924S1 (en) * 2007-05-31 2009-06-23 Carl Walther Gmbh Angled ejection port for guns
WO2011085457A1 (fr) * 2010-01-15 2011-07-21 Forjas Taurus S/A. Procédé de production d'armes à feu
USD777871S1 (en) * 2015-12-22 2017-01-31 Agency Arms, Llc Firearm slide
US10408556B2 (en) 2016-11-29 2019-09-10 Rustbelt Industries, LLC Laser training device with simulated cycling of a firearm action
USD877429S1 (en) * 2018-04-06 2020-03-03 Gramercy Products, Inc. Ball launching device
IT201900012603A1 (it) * 2019-07-22 2021-01-22 Force 10 Ltd Pistola con dispositivo di chiusura rotante

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404159A1 (fr) * 1989-06-22 1990-12-27 Nkk Corporation Procédé pour la coulée de poudre
US5366688A (en) * 1992-12-09 1994-11-22 Iowa State University Research Foundation, Inc. Heat sink and method of fabricating
US5482671A (en) * 1993-09-28 1996-01-09 Fischerwerke, Artur Fischer Gmbh & Co. Kg Method of manufacturing interlocking parts
US6299664B1 (en) * 1998-02-04 2001-10-09 Mitsubishi Denki Kabushiki Kaisha Method of manufacturing sliding part and vortex flow generator for injection valve manufactured by that method
EP1486750A1 (fr) * 2003-06-14 2004-12-15 S.A.T. Swiss Arms Technology AG Culasse pour arme à feu
US20050016639A1 (en) * 2001-05-10 2005-01-27 Helmut Weldle Slides and methods for finishing a lock surface of a slide in a firearm

Family Cites Families (12)

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US5340510A (en) * 1993-04-05 1994-08-23 Materials Systems Incorporated Method for making piezoelectric ceramic/polymer composite transducers
AUPM286793A0 (en) * 1993-12-09 1994-01-06 Besselink, Bernard Christian A firearm locking mechanism
US5717156A (en) * 1996-02-12 1998-02-10 Smith & Wesson Corp. Semi-automatic pistol
US6237272B1 (en) * 1996-10-03 2001-05-29 Randy Lee Scott Breech block safety device
US5993507A (en) 1997-12-29 1999-11-30 Remington Arms Co., Inc. Composition and process for metal injection molding
DE19805598A1 (de) 1998-02-12 1999-08-19 Goerlich Verfahren zur Herstellung von beliebig formbaren Hinterschnitten und/oder Hohlräumen in PIM-Teilen
SE516130C2 (sv) 1999-03-15 2001-11-19 Damasteel Ab Ämne för metallprodukt, förfarande för framställning av metallprodukt samt metallprodukt
US6497065B1 (en) * 1999-05-14 2002-12-24 Michaels Of Oregon Co. Firearm barrel having protective sleeve
AU5072400A (en) * 1999-06-24 2001-01-31 Basf Aktiengesellschaft Nickel-poor austenitic steel
US6838046B2 (en) * 2001-05-14 2005-01-04 Honeywell International Inc. Sintering process and tools for use in metal injection molding of large parts
DE10151358A1 (de) 2001-10-22 2003-04-30 Gero Hochtemperaturoefen Gmbh Verfahren zur Steuerung des Entbinderungsprozesses bei MIM- oder CIM-Teilen
DE102004006364A1 (de) * 2004-02-09 2005-08-25 Umarex Sportwaffen Gmbh & Co Kg Schusswaffe, insbesondere selbstladendes Kleinkalibergewehr

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404159A1 (fr) * 1989-06-22 1990-12-27 Nkk Corporation Procédé pour la coulée de poudre
US5366688A (en) * 1992-12-09 1994-11-22 Iowa State University Research Foundation, Inc. Heat sink and method of fabricating
US5482671A (en) * 1993-09-28 1996-01-09 Fischerwerke, Artur Fischer Gmbh & Co. Kg Method of manufacturing interlocking parts
US6299664B1 (en) * 1998-02-04 2001-10-09 Mitsubishi Denki Kabushiki Kaisha Method of manufacturing sliding part and vortex flow generator for injection valve manufactured by that method
US20050016639A1 (en) * 2001-05-10 2005-01-27 Helmut Weldle Slides and methods for finishing a lock surface of a slide in a firearm
EP1486750A1 (fr) * 2003-06-14 2004-12-15 S.A.T. Swiss Arms Technology AG Culasse pour arme à feu

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT510291B1 (de) * 2011-04-04 2012-03-15 Wilhelm Bubits Pistole mit mehrteiligem laufschlitten
AT510291A4 (de) * 2011-04-04 2012-03-15 Wilhelm Bubits Pistole mit mehrteiligem laufschlitten
WO2013113880A1 (fr) 2012-02-02 2013-08-08 Basf Se Matière thermoplastique pom
WO2014170242A1 (fr) 2013-04-18 2014-10-23 Basf Se Copolymères de polyoxyméthylène et composition de pom thermoplastique
US10961384B2 (en) 2014-05-21 2021-03-30 Basf Se Process for improving the flexural toughness of moldings

Also Published As

Publication number Publication date
US7731894B2 (en) 2010-06-08
DE502006001973D1 (de) 2008-12-18
RU2427450C2 (ru) 2011-08-27
RU2006114005A (ru) 2007-11-20
US20070084040A1 (en) 2007-04-19
EP1717539B1 (fr) 2008-11-05
ATE413579T1 (de) 2008-11-15

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