WO2014057346A2 - Processo de fabricação de um componente poroso e componente - Google Patents
Processo de fabricação de um componente poroso e componente Download PDFInfo
- Publication number
- WO2014057346A2 WO2014057346A2 PCT/IB2013/002308 IB2013002308W WO2014057346A2 WO 2014057346 A2 WO2014057346 A2 WO 2014057346A2 IB 2013002308 W IB2013002308 W IB 2013002308W WO 2014057346 A2 WO2014057346 A2 WO 2014057346A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- porous component
- porous
- component
- sintering
- manufacturing
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 claims abstract description 97
- 239000000463 material Substances 0.000 claims abstract description 87
- 239000000843 powder Substances 0.000 claims abstract description 84
- 230000008569 process Effects 0.000 claims abstract description 70
- 239000011148 porous material Substances 0.000 claims abstract description 66
- 238000001746 injection moulding Methods 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000005245 sintering Methods 0.000 claims description 57
- 238000002360 preparation method Methods 0.000 claims description 41
- 239000000203 mixture Substances 0.000 claims description 33
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 239000002245 particle Substances 0.000 claims description 31
- 239000011230 binding agent Substances 0.000 claims description 23
- 229920001169 thermoplastic Polymers 0.000 claims description 20
- 238000000465 moulding Methods 0.000 claims description 18
- 239000001993 wax Substances 0.000 claims description 16
- 238000000280 densification Methods 0.000 claims description 12
- 238000011049 filling Methods 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000007791 liquid phase Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000001311 chemical methods and process Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical compound [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 230000033001 locomotion Effects 0.000 abstract description 4
- 230000002452 interceptive effect Effects 0.000 abstract description 2
- 230000009977 dual effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 25
- 239000012530 fluid Substances 0.000 description 12
- 238000009826 distribution Methods 0.000 description 10
- 229920000642 polymer Polymers 0.000 description 10
- 239000000126 substance Substances 0.000 description 9
- 238000000605 extraction Methods 0.000 description 8
- 238000004663 powder metallurgy Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000000265 homogenisation Methods 0.000 description 5
- 239000011162 core material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000011236 particulate material Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Natural products CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004581 coalescence Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000011257 shell material Substances 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 235000013871 bee wax Nutrition 0.000 description 1
- 239000012166 beeswax Substances 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 235000013869 carnauba wax Nutrition 0.000 description 1
- 239000004203 carnauba wax Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
-
- 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
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1103—Making porous workpieces or articles with particular physical characteristics
- B22F3/1109—Inhomogenous pore distribution
-
- 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
- B22F7/002—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 porous nature
-
- 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
- B22F7/002—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 porous nature
- B22F7/004—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 porous nature comprising at least one non-porous part
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
- F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
- F16C32/0622—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings via nozzles, restrictors
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/148—Agglomerating
-
- 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
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1103—Making porous workpieces or articles with particular physical characteristics
- B22F2003/1106—Product comprising closed porosity
-
- 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
-
- 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
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
Definitions
- the present invention relates to an improved MIM powder injection molding process for the purpose of achieving a porous component with the function of restricting and controlling the distribution of gaseous fluid flow in aerostatic bearings of mechanical systems such as compressors. airtight.
- a disadvantage of this type of configuration It consists of the need for dimensional precision in the making of compression rings, which makes the production process more expensive, because the higher the dimensional accuracy, the higher the cost of manufacturing the mechanical components.
- Another U.S. patent (US 6,293,184) describes microchannel-shaped restrictors arranged near the outer wall of the cylinder which, together with a sleeve into which said cylinder is inserted, form closed and isolated channels, giving rise to a plurality of restrictors. Similar to the above-cited patent, a disadvantage of this type of configuration is the need for precision glove making, which increases the manufacturing costs.
- the present invention describes a solution to fill this gap, technically made possible by the use of refined porous materials for fluid flow control, which can be produced via the processing route adapted from the powder injection molding technique. and sintering.
- porous material in engineering the term "porous material” is used when the engineering function of the material is made possible by the presence of pores in its volume, whose volumetric percentage, size, distribution depend on the specific application of it.
- the materials can be divided into materials with closed pores, which have application as structural support, or materials with open pores, which find application mainly where fluid transport is needed, for example, in control of pores. flow, filtration, catalyst support, thermal and acoustic insulation, lubricant deposit, among others.
- the process used to produce porous materials defines their properties, such as porosity type (open or closed), pore volume percent in volume, size and shape, uniformity of pore distribution and interconnectivity.
- Open porosity structures can be formed by processing routes such as replica, controlled material deposition (INCOFOAM), rapid prototyping techniques, powder metallurgy techniques such as sintering powder mixtures containing a space holder phase mixed with the matrix powder (metallic or ceramic) which is eliminated during the sintering step, etc.
- Closed pore materials can be produced by combining a syntactic foams, compacting alloy powder mixtures with foaming agents, sintering of spilled powders into gas, injecting gas directly into molten metal or addition of a molten pore forming agent, etc.
- porous components must be inexpensive; therefore it should be possible to produce them in large series of equal parts by a high process Productivity with high degree of automation and easy control.
- powder metallurgy techniques are presented as high potential processing techniques. Due to the high open porosity and high pressure drop required at the same time in the proposed porous component, it is necessary to generate a refined porous structure, which necessitates the use of fine powders which have a narrow particle size distribution to provide a narrow pore size. pore size distribution, such as those used in the alternative technique of powder metallurgy, called powder injection molding.
- This technique due to the use of very fine powders and narrow size distribution, allows obtaining a refined microstructure in general, including all microstructural elements, including pore structure when sintering is incomplete, or that is, when performed at temperatures sufficiently low to prevent pronounced sintering densification of the green part.
- a porous component with a high percentage of thin (few micrometer) communicating pores (evenly distributed pores) in the volume of the porous component, allowing a refined control of flow and pressure loss through it, constituting this porous component in a flow restrictor.
- the powder injection molding technique is known in engineering to be a technique for obtaining high density (low residual porosity) components as a function of the high sinterability presented by the very fine powders used (typically powders with average size around 1 to 40 micrometres, depending on the powder manufacturing process).
- powder injection molding conducted under normal conditions, leads to components with a volumetric percentage of less than 5% of closed (non-communicating) residual pores.
- porous with the desired engineering function of the present invention that is, use as a porous restrictor allowing for refined flow control of the gaseous fluid flow for aerostatic biasing of the hermetic compressor piston-piston.
- MIP Metal Injection Molding
- the potential market that absorbs the products manufactured from this molding process essentially comprises parts that have small mass and dimensions and high densification rate, which require large scale production.
- the main markets served by materials and parts obtained from the injection molding process are the automotive, orthopedic, defense and armament markets, electronics and the medical industry mainly.
- MPI is basically divided into Metal Injection Molding (MIM) processes and the CIM (also Ceramic Injection Molding) technique.
- MIM Metal Injection Molding
- CIM Ceramic Injection Molding
- the basic principle of the injection molding process is based on two industrially consolidated techniques: polymer injection and conventional powder metallurgy.
- the powders (ceramic and / or metallic) are mixed with an organic system formed by polymers together with other organic substances (eg paraffin and polypropylene).
- these organics are used as a vehicle to carry a load of metallic (ceramic) particles (powders) or a mixture of both, to fill the cavity of a particular mold having the shape of the part (component) to be obtained.
- the material that is sought when using the injection metal powder (MPI) molding process is a high density (ie, low residual pore) metal material, enabling via reduction of residual porosity due to the high sinterability of the fine powder used, a significant increase in the mechanical properties of the component such as hardness, strength and ductility compared to sintered material produced by traditional powder metallurgy, ie via uniaxial compaction in matrix (pressing) of 10 times larger average particle size powders (around 100 ⁇ ).
- the MPI process currently employed seeks to completely eliminate the pores of the material by the action of contact formation between dust particles and the growth of these contacts during high temperature sintering.
- sintering of components at high temperatures after their injection molding results in high volumetric shrinkage which can lead to dimensional variations and distortions in the obtained end piece.
- the "green" density of the injectate in order to obtain a high density component (low percentage of residual pores), as a rule, the "green" density of the injectate must be high, ie the Solid particles present in the prepared injection feedstock should be as large as possible.
- the aim is to minimize the presence of pores in order to achieve the dense final material quality with high geometrical precision, since the applications of the components produced by injection molding demand these properties.
- Main current applications are: bone implants, orthodontic brackets, surgical instrument components, firearms, automotive parts, among others.
- the process object of the present invention usefully and improved employs the property of pore formation from the MPI technique, adding the advantages of this, namely the reduction to the minimal loss of raw material, ease of exact control of the desired chemical composition, elimination of machining operations, good surface finish, easily automated production process, products obtained with high purity.
- the present invention is to provide a porous component for use as a flow restrictor, manufactured by the injection powder molding process, capable of accurately and reproducibly limiting gas flow even at low flow rates applied to aerostatic bearing such as between a piston and a cylinder of a gas compressor.
- the present invention is also achieved by the manufacture of a low cost porous component for aerostatic bearing application, which allows accurate and reproducible gas flow limitation, even at low flow values such as 5 - 50 cm 3. / min through the injection molding process.
- the objects of the present invention are further achieved by a process of manufacturing a porous component by injection molding powder comprising the thorough control of primary porosity through temperature and the combination of powdered materials.
- the objectives of the present invention are also achieved by a process of manufacturing a porous component via injection powder molding, provided with a dense outer layer without communicating pores, which allows it to be fixed by interference, for example, to the bearing. without changing the porous structure inside the porous component, the which is responsible for controlling the gas flow.
- the present invention also aims to provide a process for manufacturing a porous component capable of being fixed without sealing failures at the interface of the porous component with the mechanical system in which it is inserted for use in different applications.
- Figure 1 Examples of porous components obtained by molding injection powders
- Figure 2 is a perspective view of a first preferred embodiment of the present invention.
- Figure 3 is a perspective view of a second preferred embodiment of the present invention.
- the present method of manufacturing the porous material in the present invention is PI powder injection molding, which is a variant technique of powder metallurgy, which has been refined in the present invention in order to achieve a porous structure with the required characteristics.
- the intended specific application ie a porous component for the uniform distribution of gaseous fluid (flow restrictor) for aerostatic bearing.
- the porous components 1 may consist, for example, of ceramic, metallic or any other porous material, for precise control of gas flow to an aerostatic bearing, such as between the piston pair and compressor cylinder.
- the materials should have good chemical resistance, especially against corrosion, to prevent degradation by corrosion and, as a result, alteration of pore morphology, leading to alteration of the characteristics of the porous component.
- One of the many materials that can be used is stainless steel.
- the porous component 1 can be manufactured by the injection powder molding technique, as this process provides better porosity control, reproducibility of gas flow in relatively low flows at low production cost. Thus, flow, preferably but not obligatory, may range from 5 to 50 cm 3 / min.
- the present invention has as advantages those typical of processing via powder metallurgy techniques, such as: minimization of raw material losses, easy and accurate control of the chemical composition of the material, good surface finish, process easy to automate, products obtained with high purity, obtaining a controlled and homogeneous porosity.
- Such a method allows homogeneous control of porosity level, pore size and homogeneous pore distribution throughout the component volume without adding high manufacturing cost.
- One of these features is the use of fine powders with particle size between 1 and 40 micrometres, and their particle size dispersion is preferably very narrow, so that the diameter of the obtained pore channels is small and well distributed throughout the component section. porous 1.
- Another feature of the present injection molding process is that due to the low viscosity of the injection mass (mixing of powders with molten organic substances) it has a fluid-like behavior, transmitting the applied stress fully in all directions and senses. This ensures an even distribution of stress across the volume of the component being injected, preventing the formation of density gradients throughout the volume, ensuring isotropic shrinkage during the sintering step.
- a third feature that the present molding process Injection powders are the ability to control pore size and geometry by carefully controlling the size and particle size distribution of the powders used as feedstock, as well as by adjusting the parameters of the sintering process.
- low sintering temperatures ranging from 850 ° C to 1200 ° C are used in the present invention, lower than those commonly used for sintering dense mechanical components (1200 to 1200 ° C). 1400 ° C).
- dense mechanical components are those that, although having a certain percentage of closed-type residual pores (less than 5% by volume), do not have communicating-type pores and therefore cannot be percolated by a fluid. .
- porous elements with different flow characteristics are obtainable by varying the characteristics of the metallic powder used in their manufacture or by varying the sintering temperature at which the injected component will be sintered. Note that it needs to be only slightly different to generate a different porosity level in each porous component 1.
- porous elements 1 manufactured via injection molding is an economically very attractive technique.
- process of the present invention comprises the following steps, described in detail below:
- the manufacturing process of the present invention begins with the choice of feedstock composition, which comprises a first portion of metal powder and a mixture of thermoplastic polymers and waxes, which act as a carrier for particle injection.
- the present manufacturing process utilizes a metal powder such as, for example, iron powder, nickel powder, copper or 316L and 17-4 PH stainless steel powder.
- a metal powder such as, for example, iron powder, nickel powder, copper or 316L and 17-4 PH stainless steel powder.
- the chosen powder exhibits specific characteristics such as high particle packing, good injectability and ability to assist in retaining the shape of the powder. component that will be molded.
- the powder The metallic material used in the present process has a narrow particle size distribution, in which virtually all particles have a similar diameter. This allows the network of communicating pores in the volume of porous material obtained at the end of the process to exhibit a greatly reduced diameter variation.
- thermoplastic polymers and waxes that make up the preparation and act as a binding agent is responsible for ensuring fluidity of the preparation to be molded, as well as helping to achieve the homogeneity of this first mixture.
- the binding agent used in this type of process is generally composed of a mixture of low molecular weight polymers and larger chains.
- Low molecular weight polymers such as paraffin, beeswax and carnauba wax, facilitate the flow of the metal powder preparation and binder during its molding.
- larger chain polymers are intended to provide good support to the molded material, especially in the early stages of the process. Examples of these polymers are polypropylene, polystyrene and vinyl ethyl acetate.
- the agglomerating agent used in the present process is a mixture of thermoplastic polymers and waxes.
- thermoplastic polymers used in the preparation of the organic binder powder mixtures of the present process are capable of imparting mechanical resistance to the feedstock which will be injection molded (step v).
- thermoplastic polymers of the preparation do not have their structure affected during the first wax removal step (chemical extraction - step vi).
- the preparation comprises a ratio of metal powder and the mixture of thermoplastic polymers and waxes in a ratio ranging from 20% to 80%, preferably from 40% to 60%.
- step i) of the present preparation of the preparation to at least one homogenization point.
- Said homogenization point should achieve a sufficiently homogeneous and void-free preparation, because homogeneity between the components of the preparation increases the interaction of the metal powder with the mixture of thermoplastic polymers and waxes.
- This first step i) is performed using mixers that promote a high shear rate evenly distributed throughout the chamber, such as planetary mixers, type Z or meat.
- step i) The homogeneously mixed preparation obtained in step i) proceeds to step ii), where granulation (or pelletizing) of this preparation occurs, in order to improve the injector feed, this step being performed by a pelletizing apparatus.
- step iii) the preparation from step ii) proceeds to step iii), where it is heated to at least one melting temperature of the mixture of thermoplastic polymers and waxes. This step occurs to favor the rheological and flow characteristics of the preparation that will later be inserted into a mold (steps iv and v).
- step iv) filling of a mold cavity with said heated preparation occurs.
- the mold chosen for this process must withstand higher pressure and longer cooling time than molds commonly used in polymer injection molding.
- step iv) filled with the preparation then proceeds to step v), where at least one mixture obtained in step iii) is compressed at a given velocity and pressure in the mold cavity to full filling.
- the molding is performed in equipment similar to those used for injection molding of conventional polymers, the so-called injection molding machines. In this sense, during casting the spindle compresses the material load so that it compresses, filling the entire mold cavity.
- the preparation is compacted as a porous component 1 having the shape of the mold into which it was injected, its shape being maintained by the mixture of thermoplastic polymers and waxes.
- the next step vi) comprises the removal of waxes from the molded prepared material obtained in step v) by chemical extraction.
- This chemical extraction consists of immersing the molded material in step v) in a fluid that has the function of dissolving the waxes of the preparation.
- the molded material further containing the metal powder bonded by the thermoplastic polymers in its composition
- This final structure favors the next step (vii) of thermal extraction.
- removal of the organic binder from step vi) takes place in a liquid at 20 ° C to 60 ° C for at least 1 hour, which may take more or less time depending on the liquid. and temperature chosen.
- step vii) the molded material obtained in step vi) goes to step vii), in which, by thermal extraction, the thermoplastic polymers still present in the material are removed.
- This procedure consists in heating the molded material under appropriate conditions, with thermal degradation of the thermoplastic polymers.
- the molded material is heated to promote activation such that it will gradually break the polymeric chain of thermoplastic polymers and promote the formation of initial sintering contacts capable of maintaining the shape of the component. porous 1 in place of the polymer being extracted gradually.
- the thermal extraction of the thermoplastic polymers occurs by heating the molded material in a plasma assisted or conventional resistive furnace.
- step vii) the amount of metal powder particles of the initial preparation in the geometry of the molded component are loosely joined together by still insipient sintering contacts.
- step viii This stack of metallic powder obtained from step vii) then goes to step viii), which consists of pre-sintering pa vii). In essence, this step is to promote the beginning of the process of removing voids contained between the various metal dust particles.
- step viii) is performed by heating the molded material obtained from step vii) to at least a temperature that provides sufficient mechanical strength to handle the material.
- step viii) is performed, for example, in a plasma assisted oven or conventional resistive oven at a temperature in the range from 400 ° C to 1200 ° C for at least a sufficient time to provide resistance.
- the time required to achieve the desired final properties may range from a few minutes to several hours, depending for example on whether or not pre-sintering is performed, or even the combination of steps viii and ix.
- step viii) the molded material moves to step ix), which consists of controlled sintering of the molded material obtained in step viii) to provide a homogeneous controlled porosity material, which consists of object obtained by the process of the present invention.
- the final porosity of the components obtained by the powder injection molding process is a result of this last sintering step (ix) as a function of the thermally activated mass transport, resulting in the reduction of the free specific surface by the growth of contacts between the particles, their coalescence, volume reduction and pore geometry alteration, until their complete densification.
- step ix can be divided into 3 stages:
- Stage 2 As the ratio of ne radius to particle radius increases, the particles gradually lose their identity. At this stage, the sintered material has two continuous “phases”: the material (solid phase) and the "empty” (interconnected pore network). The grain size grows, resulting in a new microstructure. Most retraction occurs at this stage.
- the molded material from step viii) is subjected to a sintering temperature sufficiently low so that the sintering does not evolve very much at stage 2 and does not reach stage 3, maintaining the interconnected pore network in the final material, or that is, unlike state-of-the-art powder molding processes, where sintering in the process of the present invention is not carried to the traditional third stage, the stage where reduction, collapse and loss of interconnectivity would occur. of the pores.
- the termination of the process of the present invention is the sintering process carried out in a conventional furnace, vacuum furnace or plasma assisted vacuum furnace, for example, where the porous structure and desired properties of the sintering are performed. opponent are hit.
- the 316L or 17-4 PH stainless steel powder sintering step is normally performed at a temperature in the range of 1250 ° C to 1380 ° C and 1200 ° C to 300 ° C to iron powder and nickel powder, aiming at the total removal of the interstices between particles, ie, practically zero interstitial porosity, intrinsic characteristic of the final material after undergoing the traditional sintering process.
- porous component 1 in this invention when stainless steel powder is used, sintering is carried out at temperatures below 900 ° C to 1200 ° C. For iron or nickel powders, in turn, the sintering process takes place at temperatures in the range of 700 ° C to 1100 ° C. In this way, the elimination of interstices is minimized, leaving a controlled interstitial porosity (6% to 50% of evenly distributed voids.
- the largest dimensional variations for the process are statistically located at the injection stage (stage iv). If in the injection stage (step iv) there is a green density gradient in the injectate, then deformation will occur during sintering, which may be intentional or unintentional, depending on the desired porosity.
- step (ix) is performed in an oven at a temperature ranging from 700 ° C to 1200 ° C depending on the material chosen for the manufacture of the porous component.
- the process of the present invention allows to achieve a differentiated result of the sintering process known from the state of the art, adding to the obtained component not only the advantages already expected, such as the geometric complexity achieved and the total utilization of the injected material, but also a process of manufacturing a material with homogeneous and controlled porosity, with energy saving, easy to implement in industries of the industry and wide application in the market.
- the present process of manufacturing a porous component 1 achieves versatility in obtaining complex geometric shapes already finished due to their rheological feature. With this one can obtain different geometries, such as threads on some specific portion of the final porous component 1. One can also get some projected protrusion.
- the porous component manufacturing process 1 of the present invention may further comprise a component having regions or layers with very distinct porosity, that is, the porous component may be configured to have a larger internal region porosity and a minor or even almost zero porosity in the external region (see Figure 3).
- Step i) may comprise the independent homogenization of two or more preparations, which after separately granulating (step ii) will be used to fill a mold cavity (step iii) according to with the expected final material.
- two prepared materials can be injected: in the outermost portion of the mold one preparation which is dense at the sintering temperature and another in the innermost portion of the mold which is porous. at the same sintering temperature.
- the present process at the end of step ix), it is possible to obtain a final material free of pores at the edge and porous at the core.
- the same powder material may also be used for the preparation, with different particle sizes.
- a finer particle size powder of greater sinterability is used in the outermost portion of the mold and a larger particle size powder in the innermost portion of the mold. Finer or smaller powders reach higher densities under the same sintering temperature, while larger powders have lower densification and therefore remain with higher porosity.
- the multimaterial component is then sintered at the temperature predicted for sintering the core material which should remain porous to have the specific properties previously described and required for the porous component. At this same temperature, due to the greater sinterability of the outer shell material or dust, it tends to become denser - without communicating pores, that is, with substantially less than 10% pore content.
- the porosity level it is necessary to use different powders and / or materials in each region of the porous component 1, (see figure 3). A requirement for this is therefore that the selected material pair has sintering compatibility so as to avoid defects in the junction interface. It is also a premise that for the same sintering temperature, the material internally placed in the porous component of Figure 3 sintered less than the material placed in the outer shell, ie that the internal material has a porosity ranging from 6%. 50% while the external one no longer has communicating pores (less than 6%).
- any powder and / or material that presents, after the sintering process, the characteristics necessary for the optimal functioning of the porous component 1 can be applied.
- the thicker powder disposed inside the porous component 1 has less sinterability than the fine powder used to inject the outer layer of the porous component 1 due to the smaller amount of metallic contacts between the particles per unit volume, resulting in therefore at a higher porosity level, as said, preferably between 6% to 50%.
- FIG. 3 Another solution for material selection of porous component 1, represented by FIG. 3, is achieved by using any material that enables the desired porosity level on the inner side of the material. component and other material which, at the selected ideal sintering temperature, forms a liquid phase and promotes liquid phase sintering, generating a high level of densification on the outside.
- an element that forms a liquid phase during sintering and after solidification a soft (plastic deforming) material such as copper facilitates interference clamping solution as the soft material will easily deform and sealing the porous restrictor preventing leakage and loss of efficiency without altering the porous structure inside the porous component 1, which is responsible for controlling the gas flow.
- porous component 1 Another way to associate porous component 1 with the aerostatic bearing could be bonding;
- glues liquid adhesives
- the solution proposed and developed in the present invention is to obtain a dense layer on the lateral surface of the porous component 1 by co-injection or over-injection of a layer using injection feedstock consisting of particulate matter distinct from the porous core, i.e. a particulate material having typically lower sintering temperature as well as having greater sinterability than the particulate material constituting the porous core of the injected component.
- the porous component 1 can then be fixed efficiently by various clamping processes (interference, gluing, tapping, etc.), as the dense part is not participating in flow control and has the exclusive function of ensuring the tightening of the restrictor in the system. without interfering with its porous structure.
- porous material manufacturing process described above can be employed in the manufacture of various types of porous components 1 for use in different applications.
- the present invention is employed in the manufacture of porous flow restrictors for aerostatic bearing.
- the flow restrictor is comprised of a porous component 1 associated with a bearing housing provided with at least one restrictive portion provided with a porosity sized to limit the flow of gas flowing from the inner cavity to the bearing clearance in a compressor. In this way the gas passes through the porous component 1 towards the bearing clearance, forming a gas mattress.
- the great advantage of producing a porous flow restrictor for aerostatic bearing through the present process is to obtain a flow restrictor with controlled porosity homogeneously distributed in the volume of the material.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- General Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Powder Metallurgy (AREA)
- Compressor (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13824324.1A EP2907604B1 (en) | 2012-10-09 | 2013-10-14 | Manufacturing process of a porous component and a porous component |
KR1020157012212A KR20160058719A (ko) | 2013-10-14 | 2013-10-14 | 다공성 부재 및 다공성 성분의 제조방법 |
CN201380064356.5A CN104837584B (zh) | 2013-10-14 | 2013-10-14 | 用于制造多孔部件的方法及其部件 |
US14/434,354 US20150266094A1 (en) | 2012-10-09 | 2013-10-14 | Manufacturing process of a porous component and a porous component |
MX2015004431A MX368616B (es) | 2012-10-09 | 2013-10-14 | Proceso para fabricar un componente poroso y componente poroso. |
AU2013328374A AU2013328374A1 (en) | 2012-10-09 | 2013-10-14 | Manufacturing process of a porous component and a porous component |
JP2015536233A JP2015536381A (ja) | 2013-10-14 | 2013-10-14 | 多孔質構成要素の製造方法および構成要素 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRBR102012025883-8 | 2012-10-09 | ||
BR102012025883-8A BR102012025883B1 (pt) | 2012-10-09 | 2012-10-09 | processo de fabricação de um componente poroso e componente |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2014057346A2 true WO2014057346A2 (pt) | 2014-04-17 |
WO2014057346A3 WO2014057346A3 (pt) | 2015-04-09 |
Family
ID=50002775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2013/002308 WO2014057346A2 (pt) | 2012-10-09 | 2013-10-14 | Processo de fabricação de um componente poroso e componente |
Country Status (6)
Country | Link |
---|---|
US (1) | US20150266094A1 (pt) |
EP (1) | EP2907604B1 (pt) |
AU (1) | AU2013328374A1 (pt) |
BR (1) | BR102012025883B1 (pt) |
MX (1) | MX368616B (pt) |
WO (1) | WO2014057346A2 (pt) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI646271B (zh) * | 2017-10-20 | 2019-01-01 | 財團法人工業技術研究院 | 多孔質氣靜壓軸承 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105537595A (zh) * | 2015-12-28 | 2016-05-04 | 上海富驰高科技有限公司 | 一种无磁17-4ph不锈钢零件的mim制造工艺 |
EP3530381B1 (en) * | 2016-11-22 | 2021-01-06 | Osaka Yakin Kogyo Co., Ltd. | Method for metal powder injection molding |
EP3366393A1 (fr) * | 2017-02-28 | 2018-08-29 | Kummer Frères SA, Fabrique de machines | Méthode de fabrication d'un corps de palier avec une porosité contrôlée pour un palier aérostatique |
WO2019054708A2 (ko) * | 2017-09-13 | 2019-03-21 | 안병식 | 잠열 또는 습기 교환 기능의 윅을 구비한 전열교환소자 및 전열교환소자용 다공성 윅의 제조방법 |
FR3095975A1 (fr) * | 2019-05-16 | 2020-11-20 | Safran Aircraft Engines | Procédé de moulage par injection d’une poudre d’une aube de turbomachine |
EP3999219A4 (en) * | 2019-07-19 | 2023-08-09 | Entegris, Inc. | POROUS SINTERED MEMBRANES AND METHODS FOR PREPARING POROUS SINTERED MEMBRANES |
CN111570808A (zh) * | 2020-05-28 | 2020-08-25 | Oppo(重庆)智能科技有限公司 | 无磁17-4ph不锈钢材料及其制备方法、电子设备的壳体 |
CN113600817B (zh) * | 2021-07-28 | 2023-01-06 | 深圳市泛海统联精密制造股份有限公司 | 一种导磁与非导磁双材料金属粉末注塑成型工艺 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6293184B1 (en) | 1999-09-02 | 2001-09-25 | Sunpower, Inc. | Gas bearing and method of making a gas bearing for a free piston machine |
US6901845B2 (en) | 2001-10-19 | 2005-06-07 | Global Cooling Bv | Porous restrictor for gas bearing |
WO2008055809A1 (de) | 2006-11-07 | 2008-05-15 | BSH Bosch und Siemens Hausgeräte GmbH | Linearverdichter und gasdrucklager dafür |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4073999A (en) * | 1975-05-09 | 1978-02-14 | Minnesota Mining And Manufacturing Company | Porous ceramic or metallic coatings and articles |
DE3736660A1 (de) * | 1987-10-29 | 1989-05-11 | Mtu Muenchen Gmbh | Verfahren zur herstellung eines poroesen formkoerpers |
WO1999011407A1 (fr) * | 1997-08-29 | 1999-03-11 | Pacific Metals Co., Ltd. | Procede de production de poudre metallique par atomisation et son appareil |
US20030012677A1 (en) * | 2001-07-11 | 2003-01-16 | Senini Robert J. | Bi-metallic metal injection molded hand tool and manufacturing method |
US20030063993A1 (en) * | 2001-10-03 | 2003-04-03 | Reiter Frederick B. | Metal injection molding multiple dissimilar materials to form composite electric machine rotor and rotor sense parts |
CN100419105C (zh) * | 2005-02-04 | 2008-09-17 | 李北 | 一种金属陶瓷材料及其成型工艺 |
US7429132B1 (en) * | 2005-08-16 | 2008-09-30 | Florida Turbine Technologies, Inc. | Hydrostatic air bearing with a porous metal ring |
WO2009029993A1 (en) * | 2007-09-07 | 2009-03-12 | The University Of Queensland | Metal injection moulding method |
JP2009103280A (ja) * | 2007-10-25 | 2009-05-14 | Ntn Corp | 動圧軸受装置およびその製造方法 |
CA2797746C (en) * | 2009-04-29 | 2021-12-07 | Maetta Sciences Inc. | A method for co-processing components in a metal injection molding process, and components made via the same |
-
2012
- 2012-10-09 BR BR102012025883-8A patent/BR102012025883B1/pt active IP Right Grant
-
2013
- 2013-10-14 MX MX2015004431A patent/MX368616B/es active IP Right Grant
- 2013-10-14 WO PCT/IB2013/002308 patent/WO2014057346A2/pt active Application Filing
- 2013-10-14 AU AU2013328374A patent/AU2013328374A1/en not_active Abandoned
- 2013-10-14 US US14/434,354 patent/US20150266094A1/en not_active Abandoned
- 2013-10-14 EP EP13824324.1A patent/EP2907604B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6293184B1 (en) | 1999-09-02 | 2001-09-25 | Sunpower, Inc. | Gas bearing and method of making a gas bearing for a free piston machine |
US6901845B2 (en) | 2001-10-19 | 2005-06-07 | Global Cooling Bv | Porous restrictor for gas bearing |
WO2008055809A1 (de) | 2006-11-07 | 2008-05-15 | BSH Bosch und Siemens Hausgeräte GmbH | Linearverdichter und gasdrucklager dafür |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI646271B (zh) * | 2017-10-20 | 2019-01-01 | 財團法人工業技術研究院 | 多孔質氣靜壓軸承 |
Also Published As
Publication number | Publication date |
---|---|
MX2015004431A (es) | 2015-09-23 |
EP2907604A2 (en) | 2015-08-19 |
US20150266094A1 (en) | 2015-09-24 |
WO2014057346A3 (pt) | 2015-04-09 |
MX368616B (es) | 2019-10-09 |
BR102012025883B1 (pt) | 2018-12-18 |
EP2907604B1 (en) | 2020-04-15 |
AU2013328374A1 (en) | 2015-05-28 |
BR102012025883A2 (pt) | 2014-10-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2014057346A2 (pt) | Processo de fabricação de um componente poroso e componente | |
JP2015536381A (ja) | 多孔質構成要素の製造方法および構成要素 | |
CN108380888B (zh) | 一种弱磁17-4ph材料零件的mim制造工艺 | |
CN101844227B (zh) | 硬质合金注射成形用黏结剂的应用 | |
US20030062660A1 (en) | Process of metal injection molding multiple dissimilar materials to form composite parts | |
US5588477A (en) | Method of making metal matrix composite | |
Fu et al. | Injection molding, debinding and sintering of 316L stainless steel microstructures | |
EP1808243B1 (en) | Process for producing porous sinter, porous-sinter molding material, and porous sinter | |
Basir et al. | Process parameters used in macro/micro powder injection molding: an overview | |
JP2010515829A (ja) | セラミックス複合成形体および/または粉末冶金複合成形体およびその製造法 | |
JP4129201B2 (ja) | 乾燥自己潤滑性高密度材料、該材料から形成された機械部品、該材料の製造方法 | |
EP3448605A1 (en) | Method, housing and apparatus for manufacturing a component | |
JP6933894B2 (ja) | 多孔質成形体の製造方法 | |
Gülsoy et al. | Development of poly (2-ethyl-2-oxaline) based water-soluble binder for injection molding of stainless steel powder | |
CN102512880B (zh) | 过滤板的制造方法 | |
JP2010007141A (ja) | 焼結含油軸受材およびその製造法 | |
Alcock | Co-injection promises further growth for MIM | |
US9308678B2 (en) | Process for the manufacture of sintered products | |
JPH03232906A (ja) | 複合焼結品 | |
Moritz et al. | Hybridization of materials and processes by additive manufacturing | |
Lobovsky et al. | Solid Freeform fabrication of stainless steel using Fab@ Home | |
CN107639232A (zh) | 复合结构件的制造方法 | |
CN105669206A (zh) | 多孔碳化硅陶瓷及其制备方法 | |
JP3830802B2 (ja) | 焼結品の製造方法および焼結品 | |
Majdi | Effect of powder shape and size on the properties of low-viscosity iron-based feedstock used in low-pressure powder injection molding |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13824324 Country of ref document: EP Kind code of ref document: A2 |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 14434354 Country of ref document: US Ref document number: MX/A/2015/004431 Country of ref document: MX |
|
ENP | Entry into the national phase |
Ref document number: 2015536233 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2013824324 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 20157012212 Country of ref document: KR Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2013328374 Country of ref document: AU Date of ref document: 20131014 Kind code of ref document: A |