EP0426581B1 - Perfectionnement au procédé de moulage à mousse perdue et sous pression contrôlée de pièces métalliques - Google Patents
Perfectionnement au procédé de moulage à mousse perdue et sous pression contrôlée de pièces métalliques Download PDFInfo
- Publication number
- EP0426581B1 EP0426581B1 EP90420466A EP90420466A EP0426581B1 EP 0426581 B1 EP0426581 B1 EP 0426581B1 EP 90420466 A EP90420466 A EP 90420466A EP 90420466 A EP90420466 A EP 90420466A EP 0426581 B1 EP0426581 B1 EP 0426581B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- mpa
- metal
- seconds
- period
- 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
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 23
- 239000002184 metal Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010114 lost-foam casting Methods 0.000 title claims abstract 3
- 239000004576 sand Substances 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 1
- 239000011230 binding agent Substances 0.000 claims 1
- 238000007711 solidification Methods 0.000 description 9
- 230000008023 solidification Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 241000897276 Termes Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000001033 granulometry Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- 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
- 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
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D9/00—Machines or plants for casting ingots
Definitions
- This technique has proven to be attractive on an industrial scale, because it avoids the prior manufacture, by compacting and agglomeration of powdery refractory materials, of rigid molds associated in a more or less complicated way with cores via channels. , and that it allows easy recovery of the molded parts as well as easy recycling of the molding materials.
- This request teaches that after filling the mold with the molten metal, that is to say when the model has been completely destroyed by the metal, the vapors emitted by the foam have been evacuated, and preferably before the solidification of the metal begins, one exercises on the whole of the mold and metal isostatic gas pressure. This pressure is applied according to increasing values over time in order to avoid the phenomenon of watering and so that the maximum value is reached in less than 15 seconds.
- the maximum pressure value was set between 0.5 and 1.5 MPa. But thereafter, this range was extended up to 10 MPa in the French addition certificate n ° 89-11943 deposited on September 7, 1989, in order to be able, among other improvements, to increase the resistance to fatigue of the manufactured parts .
- the Applicant has also found that, in addition to the phenomenon of watering leading to a deformation of the part, there occurs during the combustion of the foam by the metal, a prior liquefaction of this foam followed by gasification. which generated a pressure such that gas penetrated into the metal and formed there blows while causing the appearance of carbon inclusions resulting from incomplete combustion of the foam residues.
- the pressure growth rate is between 0.003 and 0.3 MPa / sec and the smaller the thickness of the part, the greater the overpressure being reached in less than two seconds.
- the first period is at most two seconds since this value is most often sufficient to avoid the aforementioned drawbacks.
- the increase in pressure build-up speed can be obtained in two different ways: - Either one proceeds in two stages during each of which a low and constant speed first then greater and constant then is applied. The pressure curve as a function of time is then represented by two straight portions with a common point located at time t ⁇ 5 seconds.
- the pressure curve is then represented by a continuously increasing curve on which at time t ⁇ 5 seconds, the value of v is less than 0.3 MPa / sec. This can be obtained using a valve whose passage section increases gradually.
- a collector for an internal combustion engine was made of an aluminum alloy of the A-S7U3G type containing by weight 6.9% of silicon, 3.1% of copper, 0.3% of magnesium, balance of aluminum and usual impurities .
- This collector had thick flanges and thin fabrics 3 mm thick for which the time to reach a solidification rate of 30% was around 4 seconds; moreover, the path of the metal being long, this led to a low supply speed at the end of filling and required the metal to overheat.
- a suspension arm was made of an aluminum alloy of the A-S7G0.3 type containing by weight 7.5% of silicon, 0.25% of magnesium, aluminum balance and its usual impurities. This arm had a normal thickness of 6 to 8 mm and the time required to reach a solidification rate of 30% was of the order of 20 seconds.
Landscapes
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Mold Materials And Core Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Catalysts (AREA)
- Powder Metallurgy (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Dental Prosthetics (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Casting Devices For Molds (AREA)
- Forging (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90420466T ATE91445T1 (de) | 1989-10-31 | 1990-10-29 | Verfahren zum vollformgiessen von metallischen gegenstaenden unter kontrolliertem druck. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8914730 | 1989-10-31 | ||
| FR898914730A FR2653692B2 (fr) | 1986-11-17 | 1989-10-31 | Perfectionnement au procede de moulage a mousse perdue et sous pression controlee de pieces metalliques. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0426581A1 EP0426581A1 (fr) | 1991-05-08 |
| EP0426581B1 true EP0426581B1 (fr) | 1993-07-14 |
Family
ID=9387247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90420466A Expired - Lifetime EP0426581B1 (fr) | 1989-10-31 | 1990-10-29 | Perfectionnement au procédé de moulage à mousse perdue et sous pression contrôlée de pièces métalliques |
Country Status (24)
| Country | Link |
|---|---|
| US (1) | US5088544A (zh) |
| EP (1) | EP0426581B1 (zh) |
| JP (1) | JPH0626750B2 (zh) |
| KR (1) | KR940002018B1 (zh) |
| CN (1) | CN1017974B (zh) |
| AT (1) | ATE91445T1 (zh) |
| AU (1) | AU627374B2 (zh) |
| BG (1) | BG93124A (zh) |
| BR (1) | BR9005428A (zh) |
| CA (1) | CA2027974A1 (zh) |
| CS (1) | CS520090A3 (zh) |
| DE (1) | DE69002218T2 (zh) |
| DK (1) | DK0426581T3 (zh) |
| ES (1) | ES2042256T3 (zh) |
| FI (1) | FI92807C (zh) |
| HU (1) | HU205289B (zh) |
| IE (1) | IE903892A1 (zh) |
| MX (1) | MX171994B (zh) |
| NO (1) | NO175415C (zh) |
| PL (1) | PL165320B1 (zh) |
| PT (1) | PT95746A (zh) |
| RU (1) | RU1834745C (zh) |
| SI (1) | SI9012042A (zh) |
| YU (1) | YU47436B (zh) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2651453B2 (fr) * | 1989-09-07 | 1994-03-25 | Pechiney Aluminium | Perfectionnement au procede de moulage a mousse perdue et sous pression de pieces metalliques. |
| US5301739A (en) * | 1992-06-30 | 1994-04-12 | Cook Arnold J | Method for casting and densification |
| CN1044097C (zh) * | 1993-09-30 | 1999-07-14 | 上海卡拿翰五金电器有限公司 | 聚苯乙烯发泡型消失模铸造工艺及所用的砂箱 |
| US6152218A (en) * | 1998-10-19 | 2000-11-28 | Texaco Inc. | Apparatus for reducing the production of particulate material in a subterranean well |
| US6749006B1 (en) | 2000-10-16 | 2004-06-15 | Howmet Research Corporation | Method of making investment casting molds |
| US6763876B1 (en) | 2001-04-26 | 2004-07-20 | Brunswick Corporation | Method and apparatus for casting of metal articles using external pressure |
| US6883580B1 (en) | 2003-01-27 | 2005-04-26 | Brunswick Corporation | Apparatus and improved method for lost foam casting of metal articles using external pressure |
| US7100669B1 (en) | 2003-04-09 | 2006-09-05 | Brunswick Corporation | Aluminum-silicon casting alloy having refined primary silicon due to pressure |
| US7494554B1 (en) | 2003-05-07 | 2009-02-24 | Brunswick Corporation | Method for continuous manufacturing of cast articles utilizing one or more fluidized beds for heat treating and aging purposes |
| US6957685B1 (en) * | 2003-05-07 | 2005-10-25 | Brunswick Corporation | Method of cleaning and of heat treating lost foam castings |
| US11047032B2 (en) | 2013-03-05 | 2021-06-29 | Brunswick Corporation | Method for solution heat treating with pressure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3420291A (en) * | 1965-12-29 | 1969-01-07 | Trw Inc | Method for reducing metal casting porosity |
| DE2358719A1 (de) * | 1973-11-26 | 1975-06-05 | Dso Metalurgia Rudodobiv | Verfahren und vorrichtung zum giessen von metallen und metall-legierungen |
| FR2254387B1 (zh) * | 1973-12-12 | 1978-09-29 | Dso Metalurgia Rudodobiv | |
| SU1079353A1 (ru) * | 1982-05-17 | 1984-03-15 | Московский автомеханический институт | Способ лить в песчано-глинистые формы в автоклаве |
| FR2606688B1 (fr) * | 1986-11-17 | 1989-09-08 | Pechiney Aluminium | Procede de moulage a mousse perdue de pieces metalliques |
| JP2543899B2 (ja) * | 1987-07-30 | 1996-10-16 | マツダ株式会社 | フルモ−ルド鋳造方法 |
-
1990
- 1990-10-09 US US07/594,706 patent/US5088544A/en not_active Expired - Lifetime
- 1990-10-18 CA CA002027974A patent/CA2027974A1/fr not_active Abandoned
- 1990-10-23 PL PL90287464A patent/PL165320B1/pl unknown
- 1990-10-24 CS CS905200A patent/CS520090A3/cs unknown
- 1990-10-25 KR KR1019900017190A patent/KR940002018B1/ko not_active IP Right Cessation
- 1990-10-26 BR BR909005428A patent/BR9005428A/pt unknown
- 1990-10-29 ES ES199090420466T patent/ES2042256T3/es not_active Expired - Lifetime
- 1990-10-29 SI SI9012042A patent/SI9012042A/sl unknown
- 1990-10-29 AT AT90420466T patent/ATE91445T1/de not_active IP Right Cessation
- 1990-10-29 EP EP90420466A patent/EP0426581B1/fr not_active Expired - Lifetime
- 1990-10-29 YU YU204290A patent/YU47436B/sh unknown
- 1990-10-29 DE DE90420466T patent/DE69002218T2/de not_active Expired - Fee Related
- 1990-10-29 DK DK90420466.6T patent/DK0426581T3/da active
- 1990-10-30 JP JP2293493A patent/JPH0626750B2/ja not_active Expired - Fee Related
- 1990-10-30 HU HU906933A patent/HU205289B/hu not_active IP Right Cessation
- 1990-10-30 MX MX023097A patent/MX171994B/es unknown
- 1990-10-30 FI FI905367A patent/FI92807C/fi not_active IP Right Cessation
- 1990-10-30 PT PT95746A patent/PT95746A/pt not_active Application Discontinuation
- 1990-10-30 AU AU65617/90A patent/AU627374B2/en not_active Expired
- 1990-10-30 RU SU904831530A patent/RU1834745C/ru active
- 1990-10-30 NO NO904706A patent/NO175415C/no unknown
- 1990-10-30 IE IE389290A patent/IE903892A1/en unknown
- 1990-10-30 BG BG093124A patent/BG93124A/bg unknown
- 1990-10-31 CN CN90108707A patent/CN1017974B/zh not_active Expired
Also Published As
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