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US20070000128A1 - Fuel injector nozzle manufacturing method - Google Patents

Fuel injector nozzle manufacturing method Download PDF

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Publication number
US20070000128A1
US20070000128A1 US11/477,570 US47757006A US2007000128A1 US 20070000128 A1 US20070000128 A1 US 20070000128A1 US 47757006 A US47757006 A US 47757006A US 2007000128 A1 US2007000128 A1 US 2007000128A1
Authority
US
United States
Prior art keywords
nozzle
debinding
assembly
green
fuel injector
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
US11/477,570
Other languages
English (en)
Inventor
Kenneth Chung
Raul Tocci
Daniel Nehmer
Robert Thompson
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.)
BRP US Inc
Original Assignee
BRP US Inc
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 BRP US Inc filed Critical BRP US Inc
Priority to US11/477,570 priority Critical patent/US20070000128A1/en
Assigned to BRP US INC. reassignment BRP US INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHUNG, KENNETH, NEHMER, DANIEL A., THOMPSON, ROBERT, TOCCI, RAUL A.
Publication of US20070000128A1 publication Critical patent/US20070000128A1/en
Assigned to BANK OF MONTREAL, AS ADMINISTRATIVE AGENT reassignment BANK OF MONTREAL, AS ADMINISTRATIVE AGENT SECURITY AGREEMENT Assignors: BRP US INC.
Assigned to BANK OF MONTREAL, AS ADMINISTRATIVE AGENT reassignment BANK OF MONTREAL, AS ADMINISTRATIVE AGENT SECURITY AGREEMENT Assignors: BRP US INC.
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166—Selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8046—Fuel injection apparatus manufacture, repair or assembly the manufacture involving injection moulding, e.g. of plastic or metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49231—I.C. [internal combustion] engine making
    • 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
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49298—Poppet or I.C. engine valve or valve seat making
    • 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
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49298—Poppet or I.C. engine valve or valve seat making
    • Y10T29/49314—Poppet or I.C. engine valve or valve seat making with assembly or composite article making

Definitions

  • the present invention relates to a manufacturing method for fuel injector nozzles.
  • the present invention more specifically relates to a manufacturing method for fuel injectors using a metal injection molding process.
  • the fuel injector nozzle 20 is critical because it is responsible, in part, for the fuel spray characteristic which determines the combustion characteristics of the engine.
  • the nozzle 20 needs to interface with the cylinder head 12 of the engine and also receives a needle 22 which acts as a fuel valve. These aspects of the nozzle 20 also require precision manufacturing.
  • the nozzle 20 which is normally made of metal, has a passage 26 to receive needle 22 .
  • the needle 22 is upwardly biased by spring 24 .
  • the needle 22 sits in the valve seat 32 to seal the nozzle 20 .
  • the nozzle 20 also has at least one fuel passage 42 which communicates at one end with a fuel source and at the other with passage 26 .
  • the nozzle 20 has four fuel passages 42 .
  • the fuel passages 42 communicate with the passage 26 such that fuel entering the passage 26 will do so generally tangentially to the wall of the passage 26 . This configuration helps in the formation of the fuel spray droplets.
  • the complex shape of the fuel passages 42 make it very difficult to manufacture the nozzle 20 as a single part by using conventional manufacturing processes such as casting and machining.
  • the nozzle 20 is usually made in two parts: the nozzle seat 30 and the nozzle insert 40 .
  • the fuel passages 42 can be made as grooves in the outer surface 44 of the nozzle insert 40 .
  • the inner surface 36 of the nozzle seat 30 closes the grooves to make the fuel passages 42 .
  • MIM metal injection molding
  • FIG. 5 illustrates a prior art method of manufacturing a fuel injector nozzle using the MIM process to make the nozzle insert 40 .
  • MIM material 110 is first heated in order to be injected in a mold shaped in the shape of the nozzle insert 40 at step 115 .
  • the part obtained after the injection molding 115 is know as a “green” part and is slightly larger in size than the final part.
  • the nozzle insert in the green state 120 then goes through the debinding process 125 where about 90 percent of polymeric binder is removed.
  • the resulting part is known as a “brown” part and is porous.
  • the nozzle insert in the brown state 130 is then sintered at step 135 .
  • the nozzle insert in the brown state 130 is heated thus removing the majority of the remaining polymeric binder and causing the metallic powder to fuse together to form a coherent mass.
  • the sintering 135 also causes the part to shrink to its final size.
  • the resulting nozzle insert 140 then needs to be assembled with the nozzle seat 150 .
  • the nozzle seat 150 is made using more traditional manufacturing method since it does not have the same level of complexity as the nozzle insert 140 .
  • the nozzle insert 140 and nozzle seat are bonded together using brazing at step 160 .
  • plating usually copper, is applied on the outer surface 44 ( FIG. 3 ) of the nozzle insert 140 prior to assembly 155 .
  • the nozzle insert 140 is placed in the nozzle seat 150 during the assembly step 155 .
  • the nozzle insert 140 and the nozzle seat 150 are then brazed together at step 160 .
  • the brazing step 160 has the inconvenient of causing metallic residue to buildup on the upper surfaces 34 and 46 ( FIG. 3 ) of the assembled nozzle. This residue needs to be removed by secondary machining operations at step 165 . Once the machining 165 is completed, the final nozzle assembly 170 is ready to be used in a fuel injector.
  • One aspect of the present invention provides a simplified method of manufacturing fuel injector nozzles.
  • Another aspect of the present invention provides a method of manufacturing fuel injector nozzles using metal injection molding.
  • a method of manufacturing a fuel injector nozzle where a nozzle insert and a nozzle seat are made using MIM.
  • the nozzle insert and the nozzle seat are bonded together while in their green state to make a nozzle assembly.
  • the nozzle assembly is then debinded and sintered.
  • Yet another aspect of the invention provides a method of manufacturing a fuel injector nozzle comprising: metal injection molding a nozzle insert in a green state, metal injection molding a nozzle seat in a green state, assembling the nozzle insert and the nozzle seat together while in their green states to obtain a nozzle assembly, debinding the nozzle assembly, and sintering the nozzle assembly.
  • the method further comprises machining at least one of the nozzle insert and the nozzle seat while in their green states.
  • metal injection molding the nozzle insert and the nozzle seat is done simultaneously by using a common mold.
  • the method further comprises bonding the nozzle insert and the nozzle seat together while in their green states prior to debinding the nozzle assembly
  • bonding the nozzle insert and the nozzle seat together is done by using one of rotational welding, ultrasonic welding, and thermal welding.
  • debinding the nozzle assembly is done by using one of catalytic debinding, thermal debinding, and solvent debinding.
  • a method of manufacturing a single part from multiple parts where a first part and a second part are made using MIM.
  • the first and the second parts are bonded together while in their green state to make an assembly.
  • the assembly is then debinded and sintered.
  • Yet another aspect of the invention provides a method of manufacturing a single part from multiple parts comprising: metal injection molding a first part in a green state, metal injection molding a second part in a green state, assembling the first part and the second part together while in their green states to obtain an assembly, debinding the assembly, and sintering the assembly.
  • the method further comprises machining at least one of the first part and the second part while in their green states.
  • metal injection molding the first part and the second part is done simultaneously by using a common mold.
  • the method further comprises bonding the first part and the second part together while in their green states prior to debinding the assembly
  • bonding the first part and the second part together is done by using one of rotational welding, ultrasonic welding, and thermal welding.
  • debinding the assembly is done by using one of catalytic debinding, thermal debinding, and solvent debinding.
  • green state refer to the state of an injection molded part after the injection molding process and the terms “brown state” refer to the state of a part after going through a debinding process which removes at least a portion of the polymeric binder found in the part when it is in its “green” state.
  • Embodiments of the present invention each have at least one of the above-mentioned aspects, but do not necessarily have all of them.
  • FIG. 1 is a partial cross-sectional view of a fuel injector mounted to a cylinder head and having a fuel injector nozzle that can be manufactured using the method of the present invention.
  • FIG. 2 is a top view of the fuel injector nozzle shown in FIG. 1 which can be manufactured using the method of the present invention.
  • FIG. 3 is a cross-sectional view of the fuel injector nozzle of FIG. 2 taken along line 3 - 3 .
  • FIG. 4 is a cross-sectional view of a mold used with the method of the present invention.
  • FIG. 5 illustrates a prior art method of manufacturing fuel injector nozzles.
  • FIG. 6 illustrates the method of manufacturing a fuel injector nozzle in accordance with the present invention.
  • the invention is described with reference to a fuel injector nozzle. However, it is contemplated that the method described herein can be used with any type of nozzles and assemblies having similar manufacturing requirements as a fuel injector nozzle.
  • both the nozzle seat 30 and the nozzle insert 40 are made using MIM.
  • Various MIM materials 210 can be used depending on the desired final material.
  • the MIM material 210 is first heated and then injected into molds corresponding to the shapes of the nozzle seat 30 and the nozzle insert 40 .
  • the injection molding steps 215 are done simultaneously using a single mold 50 where the mold cavities for the nozzle seat 30 and the nozzle insert 40 are disposed side by side as seen in FIG. 4 .
  • the mold 50 has a top portion 52 and a bottom portion 54 .
  • the top portion has injection gates 56 to allow for the MIM material to be injected. Vents 58 are provided between the top portion 52 and the bottom portion 54 to allow gases to escape the mold so that no gas bubbles remain in the finished part.
  • the nozzle seat 30 and the nozzle insert 40 can also be molded in separate molds and that other mold, injection gate, and vent configurations are possible without departing from the scope of the present invention.
  • the parts obtained from the injection molding process 215 are a nozzle insert in the green state 220 and a nozzle seat in the green state 225 .
  • the nozzle insert 220 and the nozzle seat 225 are then assembled (step 230 ) and bonded, preferably using welding (step 235 ), while in their green state.
  • the preferred welding method is rotational welding. Rotational welding consists in inserting one part inside another while rotating it such that the friction between the surfaces creates enough heat to melt the surfaces and create a weld when solidifying. The advantage of this type of welding is that the assembly 230 and welding 235 steps are done simultaneously. Other welding and bonding methods such as ultrasonic welding and thermal welding are possible without departing from the scope of the present invention. Under certain conditions, the sintering 255 of the nozzle assembly 240 , described below, may cause the materials of the nozzle seat 30 and the nozzle insert 40 to bond together. It is therefore contemplated that the welding step 235 may be omitted. Under those conditions, and although not necessary, welding (step 235 ) would improve the bond between the two parts.
  • the resulting nozzle assembly 240 undergoes a debinding process.
  • the polymeric binder can be removed by using a solvent, applying heat sufficient to remove the binder but not melt the metal powder (thermal debinding), or applying heat in the presence of a catalyst.
  • the later is known as catalytic debinding, and is the preferred debinding process.
  • Catalytic debinding uses lower heat levels than thermal debinding which allows the parts to better maintain their shape and dimensions. The catalytic debinding process is also faster than the other debinding processes described above.
  • the resulting nozzle assembly 250 is porous since the majority of the polymeric binder has been removed and is in a state known as the brown state.
  • the nozzle assembly in the brown state 250 then undergoes a sintering process 255 , which is the last portion of the manufacturing process.
  • sintering 255 temperature is gradually increased, initially removing the remaining polymeric binder, then causing the metal particles to fuse and bond together. This causes the nozzle assembly 250 to shrink in size. This shrinkage, however, is predictable and the molds are over-sized to compensate for this shrinkage.
  • the final nozzle assembly 260 has the desired shape and dimensions. Also, the final nozzle assembly 260 requires no further manufacturing steps prior to using it in a fuel injector. It would however be possible to do so if desired.
  • This method takes advantage of the MIM process to be able to create complex geometries, and by assembling and welding the parts during their green state, the number of operations, and therefore the cost, is greatly reduced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Fuel-Injection Apparatus (AREA)
US11/477,570 2005-06-30 2006-06-30 Fuel injector nozzle manufacturing method Abandoned US20070000128A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/477,570 US20070000128A1 (en) 2005-06-30 2006-06-30 Fuel injector nozzle manufacturing method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US69501305P 2005-06-30 2005-06-30
US11/477,570 US20070000128A1 (en) 2005-06-30 2006-06-30 Fuel injector nozzle manufacturing method

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US20070000128A1 true US20070000128A1 (en) 2007-01-04

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US (1) US20070000128A1 (fr)
WO (1) WO2007005632A1 (fr)

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US20090014561A1 (en) * 2007-07-15 2009-01-15 General Electric Company Components capable of transporting liquids manufactured using injection molding
US7677479B2 (en) * 2007-10-30 2010-03-16 Mitsubishi Electric Corporation Fuel injection valve and manufacturing method thereof
FR3035808A1 (fr) * 2015-05-04 2016-11-11 Snecma Procede de fabrication d'une piece a partir d'elements fabriques par mise en forme d'un melange de poudre de metal ou de ceramique et d'au moins un liant
CN106984821A (zh) * 2017-04-13 2017-07-28 惠州威博精密科技有限公司 一种旋流喷嘴的制造方法
US10011044B2 (en) 2014-07-21 2018-07-03 Pratt & Whitney Canada Corp. Method of forming green part and manufacturing method using same
US10406537B2 (en) 2011-11-02 2019-09-10 3M Innovative Properties Company Method of making a nozzle
WO2022242847A1 (fr) * 2021-05-19 2022-11-24 Schunk Sintermetalltechnik Gmbh Procédé de fabrication d'une buse d'imprimante

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WO2007097583A1 (fr) * 2006-02-24 2007-08-30 Hpm Technology Co., Ltd. Substance pour moulage par injection et procédé de fabrication
US7543383B2 (en) * 2007-07-24 2009-06-09 Pratt & Whitney Canada Corp. Method for manufacturing of fuel nozzle floating collar
US10226818B2 (en) 2009-03-20 2019-03-12 Pratt & Whitney Canada Corp. Process for joining powder injection molded parts
CA2797746C (fr) * 2009-04-29 2021-12-07 Maetta Sciences Inc. Procede de co-traitement de composants dans un procede de moulage par injection de metal, et composants produits par celui-ci
NL2003325C2 (en) * 2009-08-03 2011-02-04 Syroko B V Method for producing a powder injection moulded part.
DE102010035506A1 (de) * 2010-05-25 2012-01-05 OBE OHNMACHT & BAUMGäRTNER GMBH & CO. KG Verfahren zur Herstellung eines Bauteils
DE102010061958A1 (de) 2010-11-25 2012-05-31 Rolls-Royce Deutschland Ltd & Co Kg Verfahren zur Herstellung von Triebwerksbauteilen mit geometrisch komplexer Struktur
DE102011089260A1 (de) 2011-12-20 2013-06-20 Rolls-Royce Deutschland Ltd & Co Kg Verfahren zur Herstellung eines Bauteils durch Metallpulverspritzgießen
US9970318B2 (en) 2014-06-25 2018-05-15 Pratt & Whitney Canada Corp. Shroud segment and method of manufacturing

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US5482671A (en) * 1993-09-28 1996-01-09 Fischerwerke, Artur Fischer Gmbh & Co. Kg Method of manufacturing interlocking parts
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US20090014561A1 (en) * 2007-07-15 2009-01-15 General Electric Company Components capable of transporting liquids manufactured using injection molding
EP2017534A1 (fr) * 2007-07-15 2009-01-21 General Electric Company Composants capables de transporter des liquides fabriqués à l'aide d'un moulage à injection
US7677479B2 (en) * 2007-10-30 2010-03-16 Mitsubishi Electric Corporation Fuel injection valve and manufacturing method thereof
US10406537B2 (en) 2011-11-02 2019-09-10 3M Innovative Properties Company Method of making a nozzle
US10011044B2 (en) 2014-07-21 2018-07-03 Pratt & Whitney Canada Corp. Method of forming green part and manufacturing method using same
FR3035808A1 (fr) * 2015-05-04 2016-11-11 Snecma Procede de fabrication d'une piece a partir d'elements fabriques par mise en forme d'un melange de poudre de metal ou de ceramique et d'au moins un liant
CN106984821A (zh) * 2017-04-13 2017-07-28 惠州威博精密科技有限公司 一种旋流喷嘴的制造方法
WO2022242847A1 (fr) * 2021-05-19 2022-11-24 Schunk Sintermetalltechnik Gmbh Procédé de fabrication d'une buse d'imprimante

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