EP0479672B1 - Lösliche Maskenform für die Giesserei und Verfahren zur Entsorgung - Google Patents
Lösliche Maskenform für die Giesserei und Verfahren zur Entsorgung Download PDFInfo
- Publication number
- EP0479672B1 EP0479672B1 EP91402625A EP91402625A EP0479672B1 EP 0479672 B1 EP0479672 B1 EP 0479672B1 EP 91402625 A EP91402625 A EP 91402625A EP 91402625 A EP91402625 A EP 91402625A EP 0479672 B1 EP0479672 B1 EP 0479672B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shell mould
- zircon
- flour
- silica
- colloidal silica
- 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 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 36
- 229910052845 zircon Inorganic materials 0.000 claims description 21
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 21
- 235000013312 flour Nutrition 0.000 claims description 15
- 239000005350 fused silica glass Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 12
- 239000008119 colloidal silica Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000004090 dissolution Methods 0.000 claims description 8
- 229910052906 cristobalite Inorganic materials 0.000 claims description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 230000003254 anti-foaming effect Effects 0.000 claims description 6
- 238000009736 wetting Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000000375 suspending agent Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims 9
- 230000000295 complement effect Effects 0.000 claims 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims 3
- 239000011256 inorganic filler Substances 0.000 claims 1
- 229910003475 inorganic filler Inorganic materials 0.000 claims 1
- 230000008030 elimination Effects 0.000 description 7
- 238000003379 elimination reaction Methods 0.000 description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 229940072033 potash Drugs 0.000 description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 3
- 235000015320 potassium carbonate Nutrition 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 241000195940 Bryophyta Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 241001080024 Telles Species 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 235000011929 mousse Nutrition 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000005480 shot peening Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/165—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents in the manufacture of multilayered shell moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
Definitions
- the present invention relates to a shell mold for foundries, the composition of which provides properties facilitating the elimination after casting of the parts, in particular in foundry processes of the lost wax type.
- slip compositions used for the manufacture of foundry shell molds have in particular been described by EP-A-0 251 847, US-A-3 249 972, FR-A-2 348 772.
- a shell mold for foundry meeting these conditions and allowing in particular improved conditions for removing the mold after casting the parts is obtained according to the invention from slips based on a binder product chosen from colloidal silica or silicate. of ethyl and of a ceramic mineral filler leading to a mold composition in percentages of dry mass comprising between 70 and 95% of fused silica and between 5 and 30% of zircon.
- This method of obtaining the shell mold results in a final composition, in percentage of dry mass, of 70% of fused silica and 30% of zircon.
- the reinforcing slip used may include a binder product based on ethyl silicate.
- a reinforcing slip usable in such an embodiment and in accordance with the invention may include: 35% ethyl silicate, 23% zircon flour, 37% fused silica, 3% cristobalite, 2% of an additional suspension agent.
- the percentages of dry mass can vary in the proportions between fused silica which remains the majority element and zircon.
- the final composition, in percentages of dry mass is 95% of fused silica and 5% of zircon. It should therefore be noted that these percentages can vary between 70 and 95% of fused silica and between 5 and 30% of zircon.
- This last step (c) of dissolution which characterizes the invention can in particular be implemented using an autoclave and a soda bath, under average conditions of temperature and pressure of 200 ° C. and 1.5 MPa.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
- Compositions Of Oxide Ceramics (AREA)
Claims (6)
- Maskenform für die Gießerei, besonders für ein Verfahren mittels verlorenem Wachs, erhalten unter Verwendung von Schlickern mit einem aus kolloidalem Siliciumoxid oder Ethylsilikat ausgewählten Bindemittel und einem mineralkeramischen Zuschlag auf der Grundlage von Quarzgut und Zirkon, wobei die prozentuale Zusammensetzung der Formmasse in Trockenform zwischen 70 und 95 % Quarzgut und zwischen 5 und 30 % Zirkon liegt.
- Maskenform für die Gießerei gemäß Anspruch 1, erhalten durch die aufeinanderfolgenden Arbeitsgänge des Einsumpfens und Trocknens der nachstehenden Schlicker:(a) eines ersten Kontaktschlickers aus:
20 % kolloidalem Siliciumoxid,
79 % Zirkonmehl,
1 % Zuschlagmittel mit einweichenden und schaumverhindernden Eigenschaften;(b) eines zweiten Kontaktschlickers aus:
25 % kolloidalem Siliciumoxid,
49 % Zirkonmehl,
25 % Quarzmehl,
1 % Zuschlagmittel mit einweichenden und schaumverhindernden Eigenschaften;(c) eines Verstärkungsschlickers aus:
20 % kolloidalem Siliciumoxid,
33 % Zirkonmehl,
42 % Quarzmehl,
3 % Cristobalitmehl,
2 % Suspensionszusatzmittel
und wobei im Endzustand der getrockneten Masse ein Prozentsatz von 70 % Quarzgut und 30 % Zirkon vorliegt. - Maskenform für die Gießerei gemäß Anspruch 1, erhalten durch die aufeinanderfolgenden Arbeitsgänge des Einsumpfens und Trocknens der nachstehenden Schlicker:(a) eines ersten Kontaatschiickers aus:
20 % kolloidalem Siliciumoxid,
79 % Zirkonmehl,
1 % Zuschlagmittel mit einweichenden und schaumverhindernden Eigenschaften;(b) eines zweiten Kontaktschlickers aus:
25 % kolloidalem Siliciumoxid,
49 % Zirkonmehl,
25 % Quarzmehl,
1 % Zuschlagmittel mit einweichenden und schaumverhindernden Eigenschaften;(c) eines Verstärkungsschlickers aus:
35 % Etylsilikat,
23 % Zirkonmehl,
37 % Quarzmehl,
3 % Cristobalit,
2 % Suspensionszusatzmittel. - Verfahren zur Entsorgung von einer Maskenform gemäß einem der Ansprüche 1 bis 3 nach dem Gießen von Formstücken,
dadurch gekennzeichnet,
daß es die folgenden Stufen umfaßt:(a) partielle Beseitigung der Maskenform von Hand,(b) Ausschneiden der gegossenen Formstücke,(c) völlige Lösung der Maskenform in einem basischen Bad. - Verfahren zur Entsorgung von einer Maskenform gemäß Anspruch 4, wobei die Auflösungsstufe (c) in einem Autoklaven mit einem Sodabad bei mittleren Temperatur- und Druck-Bedingungen von 200°C und 1,5 MPa erfolgt.
- Verfahren zur Entsorgung von einer Maskenform gemäß Anspruch 4, wobei die Stufe (c) der Maskenform-Auflösung in einem Pottascheluftbad erfolgt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9012159A FR2667523B1 (fr) | 1990-10-03 | 1990-10-03 | Moule carapace soluble pour fonderie et procede d'elimination. |
| FR9012159 | 1990-10-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0479672A1 EP0479672A1 (de) | 1992-04-08 |
| EP0479672B1 true EP0479672B1 (de) | 1995-08-02 |
Family
ID=9400881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91402625A Expired - Lifetime EP0479672B1 (de) | 1990-10-03 | 1991-10-02 | Lösliche Maskenform für die Giesserei und Verfahren zur Entsorgung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0479672B1 (de) |
| JP (1) | JPH04270025A (de) |
| DE (1) | DE69111735T2 (de) |
| FR (1) | FR2667523B1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722703A (zh) * | 2015-04-03 | 2015-06-24 | 莱芜市泰钢新材料有限责任公司 | 精密铸造面层浆料的制作方法 |
| RU2753188C2 (ru) * | 2016-07-22 | 2021-08-12 | Сафран | Способ изготовления оболочковой формы |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016157119A1 (en) * | 2015-03-31 | 2016-10-06 | Europea Microfusioni Aerospaziali S.P.A. | Ceramic shell for lost-wax micro-casting |
| CN107138919B (zh) * | 2017-05-18 | 2023-04-14 | 西安建筑科技大学 | 具有阈值屈曲卸载自复位功能的c形开口圆柱壳制作工艺 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1084214A (de) * | 1964-01-31 | |||
| SE7704162L (sv) * | 1976-04-22 | 1977-10-23 | United Technologies Corp | Kalciumoxidmodifierat keramiskt skalformsystem |
| FR2599649B1 (fr) * | 1986-06-10 | 1988-09-02 | Snecma | Moule-carapace cristobalitique pour fonderie, les produits et le procede utilises pour la preparation dudit moule |
-
1990
- 1990-10-03 FR FR9012159A patent/FR2667523B1/fr not_active Expired - Fee Related
-
1991
- 1991-10-02 EP EP91402625A patent/EP0479672B1/de not_active Expired - Lifetime
- 1991-10-02 DE DE69111735T patent/DE69111735T2/de not_active Expired - Fee Related
- 1991-10-03 JP JP3256753A patent/JPH04270025A/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722703A (zh) * | 2015-04-03 | 2015-06-24 | 莱芜市泰钢新材料有限责任公司 | 精密铸造面层浆料的制作方法 |
| RU2753188C2 (ru) * | 2016-07-22 | 2021-08-12 | Сафран | Способ изготовления оболочковой формы |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04270025A (ja) | 1992-09-25 |
| DE69111735T2 (de) | 1996-02-01 |
| EP0479672A1 (de) | 1992-04-08 |
| FR2667523A1 (fr) | 1992-04-10 |
| FR2667523B1 (fr) | 1993-07-09 |
| DE69111735D1 (de) | 1995-09-07 |
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