EP0759825B1 - Verfahren zur herstellung von druckgussteilen - Google Patents
Verfahren zur herstellung von druckgussteilen Download PDFInfo
- Publication number
- EP0759825B1 EP0759825B1 EP96908074A EP96908074A EP0759825B1 EP 0759825 B1 EP0759825 B1 EP 0759825B1 EP 96908074 A EP96908074 A EP 96908074A EP 96908074 A EP96908074 A EP 96908074A EP 0759825 B1 EP0759825 B1 EP 0759825B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- parting compound
- parting
- plunger
- additives
- additive
- 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
- 238000000034 method Methods 0.000 title claims description 47
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000000654 additive Substances 0.000 claims abstract description 28
- 238000005266 casting Methods 0.000 claims abstract description 22
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 11
- 238000004512 die casting Methods 0.000 claims abstract description 11
- 150000004820 halides Chemical class 0.000 claims abstract description 10
- 229910001092 metal group alloy Inorganic materials 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 238000005260 corrosion Methods 0.000 claims abstract description 8
- 239000000314 lubricant Substances 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 3
- 230000005484 gravity Effects 0.000 claims abstract description 3
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 3
- 150000001875 compounds Chemical class 0.000 claims abstract 36
- 238000003723 Smelting Methods 0.000 claims abstract 2
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 15
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 11
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 8
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 8
- ZFAKTZXUUNBLEB-UHFFFAOYSA-N dicyclohexylazanium;nitrite Chemical compound [O-]N=O.C1CCCCC1[NH2+]C1CCCCC1 ZFAKTZXUUNBLEB-UHFFFAOYSA-N 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 6
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 230000000844 anti-bacterial effect Effects 0.000 claims description 3
- 239000003899 bactericide agent Substances 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000000417 fungicide Substances 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 2
- 229960004011 methenamine Drugs 0.000 claims 3
- 230000000087 stabilizing effect Effects 0.000 claims 3
- 239000007864 aqueous solution Substances 0.000 claims 1
- 239000000919 ceramic Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910018134 Al-Mg Inorganic materials 0.000 description 1
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910018467 Al—Mg Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009716 squeeze casting Methods 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2038—Heating, cooling or lubricating the injection unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/14—Machines with evacuated die cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2007—Methods or apparatus for cleaning or lubricating moulds
Definitions
- the invention relates to a method for producing die-cast parts made of a light metal alloy.
- Die casting process for the production of light metal parts for all types of industrial reuse, for example in the automotive industry or in device manufacturing have been special in recent years therefore have been further developed to large quantities to be able to manufacture inexpensively.
- These include the so-called “Squeezecasting", in which a densification in the Form takes place, or the so-called developed by the applicant "MFT” method according to DE-OS 23 23 426 and DE-PS 30 02 886, which significantly evacuates the mold hollow body rapidly has improved. This made a faster firing order and a large throughput possible.
- US Pat. No. 5,076,344 describes a method in which a Standard aluminum alloy in the molten state over one Riser pipe is filled into a casting chamber. From there the molten aluminum alloy with the help of a plunger an evacuated mold cavity and introduced into the casting chamber. In the mold cavity the concentration of the release agent is an alkali halide, 0.5 to 3 wt .-%, while in the Casting chamber the release agent, which is also used here as lubricant is used in a concentration of 2 to 7% by weight is present.
- This method is preferred as a release agent an aqueous potassium iodide solution is used.
- the release agent, that applied to the mold or to the plunger is prevented that the aluminum alloy on the walls of the Mold cavity or the plunger and the casting chamber stick remains. The release agent thus causes a continuous and trouble-free process flow.
- alkali halides in particular Potassium iodide
- this salt is the steel-containing device parts in which the method is carried out is corroded. Even the filling process, which is about a riser pipe is cumbersome.
- Another Problem this method known from the prior art is that the quality of die casting by gas inclusions and others Contamination is reduced. The corrosion of the steel can lead to contamination in the metal alloy, since Detach corroded particles and particles from the steel surface can.
- the processors of these light metal parts are now expecting them additionally improved material properties, such as higher Strength, lower weights, thin walls, complicated Geometry, further processability, such as weldability, heat treatability, or the possibility to use modern Connection technologies when installing and removing these parts.
- the adverse effect of the alkali halides on the steel-containing parts of the process device can be reduced or avoided if the Release agent by adding corrosion-inhibiting additives bring a pH of at least 8. This has to Consequence that the process is continuous over a long period of time and can be carried out more effectively.
- Additives are, for example, hexamethylenetetramine, to dicyclohexylamine nitrite or potassium hydroxide.
- Hexamethylenetetramine and dicyclohexylamine nitrite are the release agents, such as indicated above, in a concentration of approximately 0.02 to 0.5 Vol .-% added, preferably in a concentration of 0.05 Vol .-% to 0.25 vol.%.
- the Release agent in a further advantageous embodiment of the Invention additives added for stabilization.
- a stabilizer is preferably sodium thiosulfate in a concentration from 0.01 to 0.5 vol.% added. This makes it clear Decreasing the quality of the release agent prevents what happens in turn affects the quality of the die-cast parts.
- the release agent is preferred Sodium thiosulfate, which decomposes the release agent counteracts by UV radiation and / or organic additives, such as. Fungicides or bactericides that are responsible for formation counteract fungi or the like, added. So that is ensures long-term durability of the release agent according to the invention.
- release agents can be used instead of alkali halides contain graphite dust.
- Release agent Graphite bases were used 20 to 30 years ago. you However, use was made under the requirement of increased productivity, due to the heavy contamination of the casting device and the associated time-consuming cleaning and maintenance work more and more reduced. Object of the present invention However, as already mentioned, the procedure is not increased productivity, but increased quality of die casting. Taking this into account find the past improved graphite additives application. The improvement results in a smaller grain size of 1 - 1.5 ⁇ m, and the use of graphite additives in higher dilutions.
- Another advantage of the method according to the invention is that the quality of the die casting by avoidance or reduction of the inclusions, for example, from cleavage products Release agents and lubricants arise, is improved. Thereby the ductility of the product is also significantly improved. This is significant improvement in die casting quality attributed to that used in the inventive method Vacuum is much higher than the vacuum that comes from known methods is used.
- the vacuum according to the invention relates to a range below 50 mbar. This improved vacuum of the method according to the invention reached by the plunger an extension in the direction the piston movement axis. This extension causes at the exit of the piston on the side of the mold cavity one Sealing the casting chamber.
- Casting chamber before filling the molten metal alloy heated so that pre-solidification is not possible in the first place is made of a material that has a low coefficient of thermal conductivity having. This is particularly useful here of ceramic materials.
- the metal feed of the method according to the invention is also versus the feed known from the prior art is advantageous. While often in the prior art Vacural suction technology is used i.e. the metal supply over a riser pipe is carried out in the process according to the invention Metal using an ordinary ladle or dosing furnace introduced into the casting chamber. The use of a Ladle or a dosing oven is opposed to the use of a riser pipe is technically easier to handle.
- the parts manufactured using the new process can do a lot be designed thin-walled and large area.
- the good shaping properties leave the designer a great deal of freedom.
- the lightweight material by saving weight.
- the other requirements such as consistent quality series production, high ductility, weldability and thus also guaranteeing repairability. It will be too meets the conditions of crash safety.
- Many types of joining techniques enable the combination with sheet metal or extruded profiles.
- Lubricants are from the prior art known. However, hexamethylenetetramine and Dicyclohexylamine nitrite, each in a concentration of 0.02 up to 0.5 vol.% used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Lubricants (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96908074A EP0759825B1 (de) | 1995-03-20 | 1996-03-19 | Verfahren zur herstellung von druckgussteilen |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95104092 | 1995-03-20 | ||
EP95104092 | 1995-03-20 | ||
PCT/EP1996/001182 WO1996029165A1 (de) | 1995-03-20 | 1996-03-19 | Verfahren zur herstellung von druckgussteilen |
EP96908074A EP0759825B1 (de) | 1995-03-20 | 1996-03-19 | Verfahren zur herstellung von druckgussteilen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0759825A1 EP0759825A1 (de) | 1997-03-05 |
EP0759825B1 true EP0759825B1 (de) | 1999-08-18 |
Family
ID=8219087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96908074A Expired - Lifetime EP0759825B1 (de) | 1995-03-20 | 1996-03-19 | Verfahren zur herstellung von druckgussteilen |
Country Status (8)
Country | Link |
---|---|
US (1) | US6024158A (ja) |
EP (1) | EP0759825B1 (ja) |
JP (1) | JP4068139B2 (ja) |
AT (1) | ATE183422T1 (ja) |
BR (1) | BR9605884A (ja) |
DE (1) | DE59602781D1 (ja) |
ES (1) | ES2136980T3 (ja) |
WO (1) | WO1996029165A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3508627B2 (ja) * | 1998-07-14 | 2004-03-22 | 日本軽金属株式会社 | ダイカスト法及びダイカスト製品 |
EP1034863A1 (de) * | 1999-03-05 | 2000-09-13 | Alusuisse Technology & Management AG | Verfahren zum Druckgiessen von Leichtmetallen |
DE19945461A1 (de) * | 1999-09-22 | 2001-04-19 | Linde Gas Ag | Verfahren zur Verbesserung des Magnesium-Druckgußprozesses |
IT1317350B1 (it) * | 2000-06-20 | 2003-06-16 | Idra Presse S P A | Struttura di iniettore particolarmente per impianto di pressofusionesottovuoto. |
JP4481481B2 (ja) * | 2000-12-13 | 2010-06-16 | 三和油化工業株式会社 | ダイカスト用水性離型剤及びそれを用いたダイカスト鋳造法 |
US10316616B2 (en) | 2004-05-28 | 2019-06-11 | Schlumberger Technology Corporation | Dissolvable bridge plug |
JP2006187797A (ja) * | 2005-01-07 | 2006-07-20 | Asahi Organic Chem Ind Co Ltd | 鋳型用塗型剤組成物及びそれを塗布せしめた鋳型 |
US8770261B2 (en) * | 2006-02-09 | 2014-07-08 | Schlumberger Technology Corporation | Methods of manufacturing degradable alloys and products made from degradable alloys |
EP2336756A1 (en) * | 2009-12-15 | 2011-06-22 | Nxp B.V. | Liquid immersion sensor |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2045913A (en) * | 1933-08-28 | 1936-06-30 | Dow Chemical Co | Casting light metal |
US3008202A (en) * | 1960-04-25 | 1961-11-14 | Nat Lead Co | Vacuum system for cold chamber die-casting machines |
JPS5037138B2 (ja) * | 1972-07-10 | 1975-12-01 | ||
DE2323426A1 (de) * | 1973-05-09 | 1974-11-28 | Thurner Bayer Druckguss | Absaugvorrichtung zum gesteuerten entlueften und/oder evakuieren der formen von druckgiessmaschinen |
SU772678A1 (ru) * | 1979-04-13 | 1980-10-23 | Предприятие П/Я А-1872 | Покрытие дл прессформ |
DE3002886A1 (de) * | 1980-01-28 | 1981-07-30 | Bayrisches Druckguß-Werk Thurner KG, 8015 Markt Schwaben | Druckgiessmaschine und verfahren zum betrieb derselben |
SU1235609A1 (ru) * | 1982-01-14 | 1986-06-07 | Lebedev Vladimir S | Смазка дл пресс-форм |
JPS59125255A (ja) * | 1982-12-28 | 1984-07-19 | Fuso Light Alloys Co Ltd | ダイカスト法及びダイカスト機 |
CA1213121A (en) * | 1983-04-11 | 1986-10-28 | Kenneth P. Zecman | Nozzle for die casting apparatus |
JPS60137541A (ja) * | 1983-12-24 | 1985-07-22 | Yuji Sengoku | ダイカストにおける潤滑及び冷却方法 |
JPS60203335A (ja) * | 1984-03-26 | 1985-10-14 | Honda Motor Co Ltd | 離型剤の塗布方法 |
EP0241426B1 (de) * | 1986-04-11 | 1989-07-12 | Schweizerische Aluminium Ag | Verfahren und Anlage zum Druckgiessen |
DE3771957D1 (de) * | 1986-06-27 | 1991-09-12 | Alusuisse Lonza Services Ag | Fuellbuechse fuer druckgiessmaschinen. |
US5076344A (en) * | 1989-03-07 | 1991-12-31 | Aluminum Company Of America | Die-casting process and equipment |
US5076339B1 (en) * | 1990-02-08 | 1998-06-09 | J & S Chemical Corp | Solid lubricant for die-casting process |
JP2964369B2 (ja) * | 1992-07-01 | 1999-10-18 | 日立粉末冶金株式会社 | 金型鋳造用離型剤 |
-
1996
- 1996-03-19 US US08/737,764 patent/US6024158A/en not_active Expired - Lifetime
- 1996-03-19 DE DE59602781T patent/DE59602781D1/de not_active Expired - Lifetime
- 1996-03-19 AT AT96908074T patent/ATE183422T1/de not_active IP Right Cessation
- 1996-03-19 JP JP52807996A patent/JP4068139B2/ja not_active Expired - Fee Related
- 1996-03-19 WO PCT/EP1996/001182 patent/WO1996029165A1/de active IP Right Grant
- 1996-03-19 ES ES96908074T patent/ES2136980T3/es not_active Expired - Lifetime
- 1996-03-19 BR BR9605884A patent/BR9605884A/pt not_active IP Right Cessation
- 1996-03-19 EP EP96908074A patent/EP0759825B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE183422T1 (de) | 1999-09-15 |
US6024158A (en) | 2000-02-15 |
EP0759825A1 (de) | 1997-03-05 |
JPH10501745A (ja) | 1998-02-17 |
WO1996029165A1 (de) | 1996-09-26 |
JP4068139B2 (ja) | 2008-03-26 |
ES2136980T3 (es) | 1999-12-01 |
DE59602781D1 (de) | 1999-09-23 |
BR9605884A (pt) | 1997-09-16 |
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