EP0701875B1 - Verfahren zur Herstellung metallischer Formteile durch Pulverspritzguss - Google Patents
Verfahren zur Herstellung metallischer Formteile durch Pulverspritzguss Download PDFInfo
- Publication number
- EP0701875B1 EP0701875B1 EP95113801A EP95113801A EP0701875B1 EP 0701875 B1 EP0701875 B1 EP 0701875B1 EP 95113801 A EP95113801 A EP 95113801A EP 95113801 A EP95113801 A EP 95113801A EP 0701875 B1 EP0701875 B1 EP 0701875B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sintered
- shaped part
- sintering
- binder
- parts
- 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.)
- Expired - Lifetime
Links
- 238000001746 injection moulding Methods 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title description 12
- 238000000034 method Methods 0.000 claims description 30
- 239000011230 binding agent Substances 0.000 claims description 23
- 238000005245 sintering Methods 0.000 claims description 23
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- -1 polyoxymethylene Polymers 0.000 description 13
- 239000000843 powder Substances 0.000 description 13
- 229930040373 Paraformaldehyde Natural products 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 229920006324 polyoxymethylene Polymers 0.000 description 7
- 239000004413 injection moulding compound Substances 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 5
- 239000008187 granular material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 150000004292 cyclic ethers Chemical class 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 3
- BGJSXRVXTHVRSN-UHFFFAOYSA-N 1,3,5-trioxane Chemical compound C1OCOCO1 BGJSXRVXTHVRSN-UHFFFAOYSA-N 0.000 description 3
- 229910052580 B4C Inorganic materials 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000009969 flowable effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 125000005704 oxymethylene group Chemical group [H]C([H])([*:2])O[*:1] 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 description 1
- 125000004765 (C1-C4) haloalkyl group Chemical group 0.000 description 1
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 1
- RBACIKXCRWGCBB-UHFFFAOYSA-N 1,2-Epoxybutane Chemical compound CCC1CO1 RBACIKXCRWGCBB-UHFFFAOYSA-N 0.000 description 1
- VDFVNEFVBPFDSB-UHFFFAOYSA-N 1,3-dioxane Chemical compound C1COCOC1 VDFVNEFVBPFDSB-UHFFFAOYSA-N 0.000 description 1
- CZLMRJZAHXYRIX-UHFFFAOYSA-N 1,3-dioxepane Chemical compound C1CCOCOC1 CZLMRJZAHXYRIX-UHFFFAOYSA-N 0.000 description 1
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- FZIIBDOXPQOKBP-UHFFFAOYSA-N 2-methyloxetane Chemical compound CC1CCO1 FZIIBDOXPQOKBP-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910015900 BF3 Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 125000004406 C3-C8 cycloalkylene group Chemical group 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229920012196 Polyoxymethylene Copolymer Polymers 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- STENYDAIMALDKF-UHFFFAOYSA-N cyclobutane-1,3-diol Chemical compound OC1CC(O)C1 STENYDAIMALDKF-UHFFFAOYSA-N 0.000 description 1
- VKONPUDBRVKQLM-UHFFFAOYSA-N cyclohexane-1,4-diol Chemical compound OC1CCC(O)CC1 VKONPUDBRVKQLM-UHFFFAOYSA-N 0.000 description 1
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 1
- HGGNZMUHOHGHBJ-UHFFFAOYSA-N dioxepane Chemical compound C1CCOOCC1 HGGNZMUHOHGHBJ-UHFFFAOYSA-N 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 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
- 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
-
- 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
- B22F3/12—Both compacting and sintering
- B22F3/1208—Containers or coating used therefor
- B22F3/1258—Container manufacturing
- B22F3/1283—Container formed as an undeformable model eliminated after consolidation
-
- 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
-
- 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
- B22F2003/1042—Sintering only with support for articles to be sintered
-
- 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
Definitions
- the present invention relates to an improved method for Manufacture of metallic molded parts by processing a Injection molding compound, where a.) The injection molding compound to the molded part processed and b.) part of the contained in the molded part Binder removed and c.) Sinters the molded part thus obtained.
- the green bodies obtained in this way become subsequent debinding step from most of the binder exempted, with an acid catalytic debinding the
- the advantage of this is the gentle removal of the binder to prevent the risk of cracking (page 2, lines 3 to 32).
- the porous parts thus obtained are then at Temperatures of about 1100 to 1500 ° C sintered, possibly still small amounts of residual binder escape (page 2, Lines 33 to 34).
- the process is used to manufacture inorganic sintered molded parts generally very suitable, but it can be, for example in the case of large parts, which may have complicated shapes and / or have thin walls, undesirable during sintering Deformations come.
- the sintering process requires high temperatures, to set the desired structure in the molded body. Usually the temperatures are around 1100 to 1500 ° C. At these high temperatures can, however, soften the to be sintered molded body can not be excluded. This can For example, with cutlery parts, which during the sintering process plan documents are only very incomplete, too undesirable Deform because the molded body already his own weight experiences a considerable load.
- the invention further relates to those obtainable with the method Molded parts.
- the documents used in the method according to the invention ensure good dimensional stability during the sintering process of the molded part.
- Documents that are particularly suitable advantageously approximately the contour of the finished molded part have a higher creep resistance than that Molded parts or in the sintering temperature range under the influence of Do not crawl the contact forces measurably.
- the production of the base can be preferred for some molded parts directly using the mold for the metallic molding respectively. This is, for example, the case for the production of spoons the case.
- the underlay be about 1 to 20% larger to dimension as the molded part, particularly preferably 2 to 10%.
- the measures necessary to set the dimension are known to the person skilled in the art.
- the shrinkage of the shaped body depends on the composition of the starting materials and can be varied accordingly. Furthermore can influenced by the sintering temperature on the shrinkage become, with increasing the sintering temperature becomes a stronger one Shrinkage of the molded part observed.
- sinterable metal powder In a known manner, sinterable metal powder, flowable binder and any auxiliary materials that may be added a granulate made.
- flowable binder There are numerous flowable binders Known fabrics. It is essential that when the temperature rises provide as little residual carbon as possible.
- polyoxymethylene homo- or copolymers are known to the person skilled in the art known per se and described in the literature.
- the homopolymers are generally polymerized by Formaldehyde or trioxane produced, preferably in the presence of suitable catalysts.
- Polyoxymethylene copolymers preferred in the context of the invention contain, in addition to the repeating units -OCH 2 - up to 50, preferably 0.1-20 and in particular 0.3-10 mol% of repeating units.
- R 1 to R 4 independently of one another are a hydrogen atom, a C 1 -C 4 alkyl group or a halogen-substituted alkyl group with 1-4 C atoms and R 5 is a -CH 2 -, -CH 2 O-, a by C 1 - C 4 alkyl or C 1 -C 4 haloalkyl substituted methylene group or a corresponding oxymethylene group and n has a value in the range 0-3.
- cyclic ethers are those of the formula where R 1 -R 5 and n have the meaning given above. Only examples include ethylene oxide, 1,2-propylene oxide, 1,2-butylene oxide, 1,3-butylene oxide, 1,3-dioxane, 1,3-dioxolane and dioxepane as cyclic ethers and linear oligoformals as comonomers.
- Preferred monomers of this type are ethylene diglycide, diglycidyl ether and Diether from glycidylene and formaldehyde, dioxane or Trioxane in a molar ratio of 2: 1 and diether from 2 mol of glycidyl compound and 1 mol of an aliphatic diol with 2-8 C atoms such as the diglyidyl ethers of ethylene glycol, 1,4-butanediol, 1,3-butanediol, cyclobutane-1,3-diol, 1,2-propanediol and cyclohexane-1,4-diol to name just a few examples.
- the preferred polyoxymethylene homo- or copolymers Melting points of at least 150 ° C and molecular weights (Weight average) in the range of 5000 to 15000, preferably from 7000 to 60000.
- Metals that can be contained in powder form are only for example called iron, cobalt, nickel and silicon; Alloys are e.g. iron-based alloys such as low and high alloys Steels, light metal alloys based on Aluminum and titanium as well as alloys with copper or bronze. Finally, there are also hard metals such as tungsten carbide and boron carbide or titanium nitride in combination with metals such as cobalt and Nickel into consideration. The latter can be used in the manufacture of metal-bound hard cutting tools (so-called cermets) become.
- Flow aids, stabilizers, for example, are used as auxiliaries or mold release agents used.
- the granulate is injection-molded in a known manner Green body made.
- the granulate is in Injection molding machines at temperatures of about 120 to 220 ° C, preferred 170 to 200 ° C melted and the melt in the appropriate Mold injected where it is under temperature cools down and falls below the glass softening temperature and / or the crystallite melting point of the binder solidifies and then removed from the mold.
- the green bodies obtained in this way are used in the subsequent debinding step at temperatures of around 90 to 600 ° C from one large part of the binder contained exempted.
- This can debinding in the presence of an acid is also recommended, whereby lower when acidic catalytic cleavage of the binder Temperatures during debinding are made possible.
- Suitable Acids are, for example, nitric acid, oxalic acid or Boron trifluoride; the temperatures are during the debinding here usually at about 110 to 150 ° C.
- the remaining residues of the binder ensure one good strength of the molded body even at the beginning of the sintering process, before solidification via the sintering of the metal particle starts.
- Polyethylene for example, are suitable as permanent binders, Polypropylene, polystyrene, polymethyl methacrylate or Polyvinyl pyrrolidone.
- the proportions of the permanent binder are preferably about 0.5 to 20% by weight, particularly preferably 2 to 10% by weight, based on the total binder used.
- the molded part becomes strong in the subsequent sintering process heated, which changes the structure in the desired manner and any remaining residues of the binder can be driven out. This is what is to be sintered Molded part on a base stabilizing the contours of the molded part brought.
- the temperatures during the sintering process are usually about 600 to 1600 ° C, preferably 800 to 1400 ° C, the duration usually extends from about 0.5 to 10, preferably 1 to 2 hours without heating and cooling times.
- the document should preferably be such that the The molded part to be sintered not only rests at a few points, but also is in extensive contact with the base, so that one good stabilization is ensured during sintering.
- the base itself at the sintering temperatures has sufficient creep stability.
- the method according to the invention is particularly suitable for production thin-walled or large or complex shaped components, which already without such support by you Dead weight tends to deform once the creep resistance of the material is reduced. It opens up the possibility also to produce such molded parts by powder injection molding, which so far this method because of the undesirable deformation were not accessible. This is in addition to those already listed Moldings are generally relevant where there is high dimensional accuracy is required. Usually you can with the help of method according to the invention a dimensional accuracy in the finished Shaped parts, which achieve about 0.5%, in special cases Not exceed 0.3% based on the specified value.
- Cutlery items such as knives, forks, Spoons as well as moldings with protruding parts that are otherwise under slightly bend their own weight.
- the method according to the invention offers a simple possibility To produce molded parts economically and inexpensively, whereby a high dimensional accuracy of even complex shaped components with a total high property level can be achieved. It can the method advantageously already without major effort existing injection molding process for the production of metallic molded parts be involved.
- An injection molding machine was made with a mold for a spoon equipped.
- the sintered spoon is identified by the Dimensions total length 204 mm, stick length 140 mm, bucket width 44 mm, curvature of the spoon 9 mm, curvature of the handle when resting on a flat surface 12 mm, with wall thicknesses of 1 mm on the spoon part and 3 mm on the stem. Due to the expected linear sintering shrinkage of 14.5% the shape is 14.5% larger in all dimensions than the sintered spoon.
- the injection molding compound was at one Melt temperature of 190 ° C melted and into the temperature of 110 ° C Mold injected. After a cooling time of approx. 20 sec the green parts were removed from the mold.
- a mass injected to 56 vol .-% of aluminum oxide powder with an average grain size around 1.2 ⁇ m and 44 vol .-% from one Binder consisted of 88 wt .-% of a polyoxymethylene, Melt index 50 g / 10 min at 190 ° C and 12 wt .-% from one Polybutanediol formal with an average molecular weight of around 60,000.
- the spoon green containing metal powder was placed in a nitrogen atmosphere, which contained about 1.5% concentrated nitric acid, debinded at a temperature of 120 ° C within 1 h.
- the sinter pad was in the same device in a Nitrogen atmosphere, which is also about 1.5% concentrated nitric acid contained, at a temperature of 130 ° C within Debinded for 2.5 hours. Thereupon the unbound sinter pad heated in air at a rate of 3 ° C / min to 1.540 ° C, Maintained at 1.540 ° C for 2 hours and then cooled at 5 ° C / min.
- the dimensions of the non-dense sintered base thus obtained are 4% larger than that of the finished sintered metal spoon.
- the spoon green part containing the binderless metal powder was opened laid the sinter pad and in one with molybdenum heating elements equipped sintering furnace under hydrogen, which has a dew point of less than -80 ° C at a speed of 5 ° C / min heated to 1,300 ° C, sintered 120 min at 1,300 ° C and the Sinter furnace then cooled.
- the product was an exactly true to size Get spoons.
- the green parts obtained according to Example 1 were from the binder component freed by the parts at a speed of 1 ° C / min from 160 ° C to 210 ° C, with 0.5 ° C / min from 210 ° C to 250 ° C and were heated from 250 ° C to 600 ° C at 2 ° C without the parts on to place the sintered base in a spoon shape. After opening the Entbind ceremoniessofen was found to be spherical Parts of the spoon and stick according to the influence of gravity had set and the bulges partially collapsed become.
- the green parts were placed on standard flat aluminum oxide substrates placed and then in the sintering furnace under hydrogen as in the previous one Example heated to 1,300 ° C at a rate of 5 ° C / min and kept at 1,300 ° C for a further 120 min. After that the oven cooled and opened. The curved contours of the spoons had flattened even further.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Materials For Medical Uses (AREA)
Description
Claims (4)
- Verfahren zur Herstellung eines metallischen Formteiles durch Verarbeitung einer Spritzgießmasse, wobei mandadurch gekennzeichnet, daß man das Formteil auf einer Unterlage sintert, welche annähernd die Kontur des fertigen Formteils aufweist, wobei die Kontur der Unterlage beim Sinterprozeß im wesentlichen erhalten bleibt.a) die Spritzgießmasse zu dem Formteil verarbeitet undb) einen Teil des im Formteil enthaltenen Bindemittels bei einer Temperatur von 90 bis 600°C entfernt undc) das so erhaltene Formteil sintert,
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Unterlage aus keramischen Werkstoffen aufgebaut ist.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man die Unterlage durch Spritzgießen unter Verwendung der Form für die Metallteile herstellt.
- Formteile, insbesondere Besteckteile, erhältlich gemäß Ansprüchen 1 bis 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4432797 | 1994-09-15 | ||
| DE4432797 | 1994-09-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0701875A1 EP0701875A1 (de) | 1996-03-20 |
| EP0701875B1 true EP0701875B1 (de) | 2000-06-07 |
Family
ID=6528244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95113801A Expired - Lifetime EP0701875B1 (de) | 1994-09-15 | 1995-09-02 | Verfahren zur Herstellung metallischer Formteile durch Pulverspritzguss |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5737683A (de) |
| EP (1) | EP0701875B1 (de) |
| JP (1) | JPH0881701A (de) |
| DE (1) | DE59508447D1 (de) |
| ES (1) | ES2146686T3 (de) |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10277061A (ja) * | 1997-04-04 | 1998-10-20 | Injietsukusu:Kk | 支台歯模型および歯冠修復物の製造方法 |
| JP2955754B1 (ja) * | 1998-06-01 | 1999-10-04 | 有限会社モールドリサーチ | 金属粉末の射出成形用組成物と、その組成物を用いた射出成形及び焼結法 |
| DE69941420D1 (de) * | 1998-11-17 | 2009-10-29 | Hitachi Metals Ltd | Verfahren zur Herstellung und Behandlung von magnetischen gepressten Grünlingen |
| SE514558C2 (sv) * | 1999-07-02 | 2001-03-12 | Seco Tools Ab | Metod och anordning för att tillverka ett verktyg |
| US6315935B1 (en) * | 1999-08-26 | 2001-11-13 | Alliedsignal Inc. | Low pressure injection molding of knife blades from metal feedstocks |
| US6676895B2 (en) | 2000-06-05 | 2004-01-13 | Michael L. Kuhns | Method of manufacturing an object, such as a form tool for forming threaded fasteners |
| US6537487B1 (en) | 2000-06-05 | 2003-03-25 | Michael L. Kuhns | Method of manufacturing form tools for forming threaded fasteners |
| US6838046B2 (en) * | 2001-05-14 | 2005-01-04 | Honeywell International Inc. | Sintering process and tools for use in metal injection molding of large parts |
| CA2447688A1 (en) * | 2001-05-14 | 2003-02-13 | Polymer Technologies, Inc. | Sintering process and tools for use in metal injection molding of large parts |
| DE10343780A1 (de) * | 2003-09-22 | 2005-04-14 | Mtu Aero Engines Gmbh | Verfahren zur Herstellung von Bauteilen und Halteeinrichtung |
| DE102004016333B4 (de) * | 2004-04-02 | 2006-08-31 | Webasto Ag | Heizgeräte-Brenner mit einer Prallscheibe |
| US20050227772A1 (en) * | 2004-04-13 | 2005-10-13 | Edward Kletecka | Powdered metal multi-lobular tooling and method of fabrication |
| US7413702B2 (en) * | 2005-06-30 | 2008-08-19 | Honeywell International Inc. | Advanced sintering process and tools for use in metal injection molding of large parts |
| DE102008059191A1 (de) * | 2008-11-27 | 2010-06-02 | Schaeffler Kg | Spanneinheit für eine Zugmittelspannvorrichtung |
| US20100178194A1 (en) * | 2009-01-12 | 2010-07-15 | Accellent, Inc. | Powder extrusion of shaped sections |
| FR2944721B1 (fr) * | 2009-04-24 | 2014-03-07 | Snecma | Procede de fabrication d'un aubage par moulage par injection de poudre metallique |
| US9556072B2 (en) | 2009-06-25 | 2017-01-31 | Basf Se | Process for the continuous thermal removal of binder from a metallic and/or ceramic shaped body produced by injection molding, extrusion or pressing using a thermoplastic molding composition |
| AT509613B1 (de) * | 2010-04-01 | 2017-05-15 | Univ Wien Tech | Verfahren zur herstellung von formköpern aus aluminiumlegierungen |
| CN102554234A (zh) * | 2012-02-28 | 2012-07-11 | 惠州Tcl移动通信有限公司 | 一种金属注塑成型结构件的加工方法及其支撑治具 |
| US10456834B2 (en) | 2014-06-02 | 2019-10-29 | Basf Se | Process for the production of sintered moldings |
| DE102015210770A1 (de) * | 2015-06-12 | 2016-12-15 | Rolls-Royce Deutschland Ltd & Co Kg | Bauteilkonstruktion, Bauteil für eine Gasturbine und Verfahren zur Herstellung eines Bauteils einer Gasturbine durch Metallpulverspritzgießen |
| FR3037831B1 (fr) * | 2015-06-26 | 2019-08-16 | Alliance | Fabrication d'un secteur courbe d'anneau de turbine par moulage et frittage |
| JP6745631B2 (ja) | 2016-04-05 | 2020-08-26 | 三菱重工航空エンジン株式会社 | 焼結体の製造方法及び燃焼器パネルの製造方法 |
| CN107335195B (zh) * | 2017-07-12 | 2020-01-24 | 陈长春 | 一种高尔夫球头的制造方法 |
| CN107398559A (zh) * | 2017-08-10 | 2017-11-28 | 攀枝花学院 | 一种搭配支撑的大型零部件粉末注射成型方法 |
| US20220072613A1 (en) * | 2018-12-16 | 2022-03-10 | Tritone Technologies Ltd. | Supports for components during debinding and sintering |
| EP3966008A4 (de) | 2019-05-07 | 2023-05-03 | Tritone Technologies Ltd. | Formulierungen zur generativen fertigung von dreidimensionalen gegenständen mit sinterfähigen stoffen |
| CN111136275A (zh) * | 2020-01-20 | 2020-05-12 | 江苏精研科技股份有限公司 | 一种注射成形制备大面积薄壁件的方法 |
| CN111250710B (zh) * | 2020-03-11 | 2022-12-09 | 东莞华晶粉末冶金有限公司 | 一种防烧结变形的中空结构差速器外壳加工方法 |
| JP2024504141A (ja) | 2021-01-20 | 2024-01-30 | ビーエーエスエフ ソシエタス・ヨーロピア | 低密度で良好な機械的特性を有する金属部品を製造するための材料及び方法 |
| WO2022200170A1 (en) | 2021-03-22 | 2022-09-29 | Basf Se | Mim feedstock and process for manufacturing of metal parts with improved yield strength and ductility |
| CN116493591B (zh) * | 2023-03-09 | 2026-07-17 | 美轲(广州)新材料股份有限公司 | 一种双金属组件高尔夫球头金属注射成型一次性烧结制备工艺 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1425166A (en) * | 1972-05-16 | 1976-02-18 | Lucas Industries Ltd | Method of producing hot pressed components |
| JP3128130B2 (ja) | 1989-08-16 | 2001-01-29 | ビーエーエスエフ アクチェンゲゼルシャフト | 無機焼結成形体の製造方法 |
| EP0451467B1 (de) * | 1990-03-14 | 1995-02-08 | Asea Brown Boveri Ag | Sinterverfahren mit einer Form aus einem nachgebenden keramischen Körper |
| DE9116669U1 (de) | 1991-07-23 | 1993-06-17 | WMF Württembergische Metallwarenfabrik AG, 7340 Geislingen | Besteckteile aus Metall |
| DE4322084A1 (de) * | 1993-07-02 | 1995-01-12 | Abb Research Ltd | Verfahren zur Herstellung eines Setters |
-
1995
- 1995-09-02 ES ES95113801T patent/ES2146686T3/es not_active Expired - Lifetime
- 1995-09-02 DE DE59508447T patent/DE59508447D1/de not_active Expired - Lifetime
- 1995-09-02 EP EP95113801A patent/EP0701875B1/de not_active Expired - Lifetime
- 1995-09-12 JP JP7234365A patent/JPH0881701A/ja active Pending
- 1995-09-13 US US08/527,682 patent/US5737683A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0881701A (ja) | 1996-03-26 |
| ES2146686T3 (es) | 2000-08-16 |
| US5737683A (en) | 1998-04-07 |
| DE59508447D1 (de) | 2000-07-13 |
| EP0701875A1 (de) | 1996-03-20 |
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