EP0233478B1 - Moule, son procédé de fabrication et procédé de coulée - Google Patents
Moule, son procédé de fabrication et procédé de coulée Download PDFInfo
- Publication number
- EP0233478B1 EP0233478B1 EP19870100559 EP87100559A EP0233478B1 EP 0233478 B1 EP0233478 B1 EP 0233478B1 EP 19870100559 EP19870100559 EP 19870100559 EP 87100559 A EP87100559 A EP 87100559A EP 0233478 B1 EP0233478 B1 EP 0233478B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- calcia
- metal
- casting
- chill plate
- 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
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000005266 casting Methods 0.000 title claims description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 28
- 239000000292 calcium oxide Substances 0.000 claims description 27
- 235000012255 calcium oxide Nutrition 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 description 7
- 229910000599 Cr alloy Inorganic materials 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 239000000788 chromium alloy Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910052726 zirconium Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/061—Materials which make up the mould
Definitions
- the present invention relates to a casting method using a mold containing calcia (CaO).
- a method of making a calcia mold comprising compacting calcia particles, containing no more than 20% fused magnesia, not more than 3% fused silica, not more than 2% of oxide other than calcia, magnesia and silica, and not more than 0.5% of material other than oxide and thereafter sintering by firing the article throughout a temperature of at teast 120°C.
- an active metal such as titanium and zirconium
- a mold reaction occurs and in the case of a magnesium containing and/or zirconium containing mold oxygen will be set free which contaminates the surface of the casting.
- Such a contamination of the surface of a casting requires a step of removing the contaminated layer from the surface, thereby rendering the manufacturing process complicated and costly.
- a mold comprising portions which are open at the base of the mold.
- the base rests on a spacer that in turn rests on a chill plate.
- the mold is porous and has high heat retaining properties and because the mold has a metal chill plate at the bottom, the molten metal solidifies directionally, so that the yield of the product is high.
- the active metal does not react on the mold even if it is cooled very slowly, since the mold is mainly composed of calcia.
- Figure 1 is an explanatory side elevational view of an embodiment according to the present invention
- Figure 2 is an explanatory side elevational view of a further embodiment according to the inventive method.
- Figs. 1 and 2 are respectively side elevational views of preferred embodiments of the casting method.
- a bottomless calcia mold 31 (having a cylindrical configuration and the cavity has a slightly tapered configuration toward the lower side in this embodiment) is placed on a metal chill plate 32, and a riser sleeve 33 of the same calcia is placed on the upper side of the mold 31.
- the metal chill plate 32 in Fig. 1 is a single-sheet plate, and the central part of the upper surface is recessed in this embodiment for receiving the calcia mold 31 (the recessed portion is not essential).
- the embodiment shown in Fig. 2 has the same structure as that of the embodiment in Fig. 1 except that an insulating member 34 is used in place of the calcia riser sleeve 33.
- a molten metal is poured into the bottomless calcia mold 31 by top-pouring.
- the poured molten metal is cooled by the metal chill plate 32 and gradually solidified from the lower part.
- the cooling speed is higher than that of a calcia mold having no metal chill plate, so that the position of the shrinkage cavity becomes higher.
- the riser of the mold is insulated by the calcia riser sleeve 33 or the insulating member 34, whereby the position of the shrinkage cavity become even higher.
- the calcia riser sleeve 33 and the insulating member 34 may incorporate a heating medium, or the calcia riser sleeve 33 and the insulating member 34 may have a structure which is capable of heating so as to retain the heat of the riser of the mold by providing heat therefor. It will be possible to make the position of the shrinkage cavity still higher by heating in this way.
- a calcia mold which is made by molding a calcia particulate molding material together with an appropriate non-aqueous binder, and baking the molded body is preferably used.
- the calcia particulate molding material preferably contains not less than 60 %, more preferably not less than 80 % calcia.
- a high-purity calcia mold containing not less than 90 % calcia is preferably used.
- the metal chill plate 32 ordinary steel plate, cast iron plate, copper plate and the like are preferable. In the case of using a metal chill plate of a water-cooling system, a copper plate is preferable.
- a graphite insulating member facilitates the heating and the heat retaining of the riser of the mold by electrically heating or induction heating.
- a calcia insulating member is used, if the member is made of metal powder which is mixed, molded and baked, heat retaining is also possible by induction heating.
- the calcia mold has a porosity of 30 to 70 vol%, more preferably about 40 to 50 vol%.
- a chromium alloy was poured in accordance with the embodiments shown in Figs. 1 and 2.
- the dimensions of the mold 31, the metal chill plate 32 and the insulating member 34 are described in Figs. 1 and 2.
- the riser sleeve 33 was an insulating sleeve made of calcia which was the same material as that of the mold.
- the metal chill plates 32 in Figs. 1 and 2 were made of copper.
- the shrinkage cavity in Fig. 1 was produced at a position 1.4 cm deep from the top surface of the mold, and the shrinkage cavity in Fig. 6 at a position 0 cm deep from the top surface of the mold 31.
- a chromium alloy was poured in the same way as in the method shown in Fig. 2 except that the bottom part of the mold 31 was closed by a calcia refractory material in place of the metal chill plate 32. As a result, the shrinkage cavity was produced at a position of 2.8 cm deep from the top surface of the mold.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Claims (2)
- Un procédé de coulée comprenant les étapes de :
mise en place d'un moule en chaux poreux sans fond ayant une porosité de 30 à 70% en volume sur une plaque de refroidissement métallique (32),
coulée d'un métal fondu par coulée en chute directe ; et solidification progressive dudit métal fondu à partir d'une partie inférieure tout en isolant la masselotte dudit moule . - Un procédé selon la revendication 1, dans lequel ledit moule en chaux ne contient pas moins de 60% en poids de CaO .
Applications Claiming Priority (16)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP766086A JPS62168632A (ja) | 1986-01-17 | 1986-01-17 | 多孔質カルシア鋳型の製造方法 |
JP7664/86 | 1986-01-17 | ||
JP765886A JPS62168659A (ja) | 1986-01-17 | 1986-01-17 | カルシア鋳型を用いた鋳込方法 |
JP766386A JPS62168630A (ja) | 1986-01-17 | 1986-01-17 | 鋳型 |
JP766186A JPH0628774B2 (ja) | 1986-01-17 | 1986-01-17 | 鋳 型 |
JP7663/86 | 1986-01-17 | ||
JP7662/86 | 1986-01-17 | ||
JP7661/86 | 1986-01-17 | ||
JP765986A JPS62168628A (ja) | 1986-01-17 | 1986-01-17 | 鋳型、鋳型の製造方法及び鋳造方法 |
JP7659/86 | 1986-01-17 | ||
JP7660/86 | 1986-01-17 | ||
JP766286A JPH0628775B2 (ja) | 1986-01-17 | 1986-01-17 | 鋳 型 |
JP766486A JPH0628776B2 (ja) | 1986-01-17 | 1986-01-17 | 鋳 型 |
JP7658/86 | 1986-01-17 | ||
JP1091686A JPH0635029B2 (ja) | 1986-01-21 | 1986-01-21 | カルシア鋳型の製造方法 |
JP10916/86 | 1986-01-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0233478A1 EP0233478A1 (fr) | 1987-08-26 |
EP0233478B1 true EP0233478B1 (fr) | 1991-04-24 |
Family
ID=27571615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19870100559 Expired EP0233478B1 (fr) | 1986-01-17 | 1987-01-16 | Moule, son procédé de fabrication et procédé de coulée |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0233478B1 (fr) |
DE (1) | DE3769489D1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2624770B1 (fr) * | 1987-12-16 | 1990-12-28 | Ebauchesfabrik Eta Ag | Procede de realisation d'un moule destine a la fabrication de pieces de tres petites dimensions |
JP6083521B2 (ja) * | 2013-04-16 | 2017-02-22 | 国立大学法人富山大学 | Al−Li系合金の製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1902419A (en) * | 1931-07-30 | 1933-03-21 | Dow Chemical Co | Molding composition and method of treating |
US2201366A (en) * | 1939-08-02 | 1940-05-21 | Vladimir A Grodsky | Mold composition and method of producing same |
US2876122A (en) * | 1953-08-26 | 1959-03-03 | Norton Co | Calcium oxide articles and method of making the same |
GB1122307A (en) * | 1965-07-19 | 1968-08-07 | Foseco Trading Ag | Production of moulds for metal casting |
DE2047041A1 (en) * | 1969-09-26 | 1971-04-01 | Toyoda Chuo Kenkyusho Kk | Iron melt containers with protective oxide - layers |
GB1346576A (en) * | 1971-04-19 | 1974-02-13 | Secr Defence | Method of making a mould or mould piece |
US3981346A (en) * | 1974-10-03 | 1976-09-21 | United Technologies Corporation | Method and apparatus for directional solidification |
JPS592209B2 (ja) | 1977-06-03 | 1984-01-17 | 日本電気株式会社 | Pll発振回路 |
-
1987
- 1987-01-16 DE DE8787100559T patent/DE3769489D1/de not_active Expired - Fee Related
- 1987-01-16 EP EP19870100559 patent/EP0233478B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3769489D1 (de) | 1991-05-29 |
EP0233478A1 (fr) | 1987-08-26 |
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