US20100230066A1 - Device and method for low-pressure casting of metal melts - Google Patents
Device and method for low-pressure casting of metal melts Download PDFInfo
- Publication number
- US20100230066A1 US20100230066A1 US12/741,127 US74112708A US2010230066A1 US 20100230066 A1 US20100230066 A1 US 20100230066A1 US 74112708 A US74112708 A US 74112708A US 2010230066 A1 US2010230066 A1 US 2010230066A1
- Authority
- US
- United States
- Prior art keywords
- casting
- intermediate vessel
- inoculant
- casting mold
- outlet duct
- 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.)
- Abandoned
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/007—Treatment of the fused masses in the supply runners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Definitions
- the invention relates to a device for the low-pressure casting of metal melts, comprising a casting furnace, a feed duct for the melt, a duct in the direction toward the casting mold and a feed for gaseous pressure application.
- the melt is conveyed via a riser into a casting cavity, counter to the force of gravity, by subjecting the metallic melt to gaseous pressure application in a furnace.
- melts which have additives or inoculants added to them before the casting for reasons of nucleation are treated before they enter the mold in the casting stream, in the tundish and/or in the mold itself.
- lumps of inoculant can be introduced, during the low-pressure casting, in the region of the mold runner in order to dissolve as the mold is filled.
- the disadvantage frequently associated with this is, in particular, that the inoculant in the metal melt is not distributed in a satisfactory manner in the casting mold. Different concentrations of the inoculant in the melt can result in considerable deviations in the desired properties of the cast pieces.
- This known technique requires careful adjustment of the composition and of the solution behavior of the inoculant.
- the object is achieved by virtue of the fact that an intermediate vessel is arranged between the casting mold and the duct, an access point being provided in the intermediate vessel for the addition of an inoculant.
- an overflow wall is arranged inside the intermediate vessel. It has advantageously been shown that optimum distribution of the inoculant in the melt, in particular by the flow, is achieved when the inoculant is introduced upstream of the intermediate wall.
- FIG. 1 shows a sectional view of a furnace.
- the casting furnace 1 comprises a feed duct 2 for the filling operation with metal melt 3 .
- the feed duct 2 can be closed by means of a cover 14 .
- a feed 6 is provided on the casting furnace 1 in order to apply gas pressure to the melt.
- a duct 4 adjoined directly by the intermediate vessel 7 is fitted on the casting furnace 1 .
- the casting mold 5 is arranged above the intermediate vessel 7 and is connected to the intermediate vessel 7 by way of the riser 13 via the opening 11 .
- a tubular attachment 15 for the addition of the inoculant 9 is fitted at the access point 8 to the intermediate vessel 7 .
- An overflow wall 10 for the melt 3 is provided inside the intermediate vessel 7 and is arranged slightly downstream of the end of the duct 4 .
- the casting operation proceeds as follows:
- the casting furnace 1 is filled with metal melt 3 via the feed duct 2 .
- the feed duct 2 is closed in a gas-tight manner by means of a cover 14 .
- the pressures p 1 , p 2 and p 3 correspond to atmospheric pressure.
- the chamber 16 is subjected to the application of pressure with a gaseous medium.
- the pressure p 1 is greater than the pressures p 2 and p 3 .
- the melt begins to flow into the intermediate vessel 7 via the duct 4 and the overflow wall 10 .
- the inoculant 9 is added via the tubular attachment 15 .
- the addition opening is arranged between the overflow wall 10 and the casting mold 5 . It is likewise conceivable to add the inoculant 9 in the region 17 , i.e. upstream of the overflow wall 10 .
- the inoculant 9 is mixed homogeneously with the metal melt 3 owing to the flow of the metal melt 3 .
- it is necessary to build up the pressure p 2 which corresponds to the height ⁇ H.
- p 2 is lowered to such an extent that the melt located outside the casting mold can flow back into the intermediate vessel 7 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
A device and a method for the low-pressure casting of metal melts, comprising a casting furnace (1), a feed channel (2) for the metal melt, a channel (4) in the direction toward the casting mold (5), and a feed (6) for the gaseous pressure application, an intermediate container (7) being disposed between the casting mold (5) and the channel (4), and an access (8) for adding an inoculating agent (9) being provided in the intermediate container (7).
Description
- The invention relates to a device for the low-pressure casting of metal melts, comprising a casting furnace, a feed duct for the melt, a duct in the direction toward the casting mold and a feed for gaseous pressure application.
- During low-pressure casting, the melt is conveyed via a riser into a casting cavity, counter to the force of gravity, by subjecting the metallic melt to gaseous pressure application in a furnace.
- During gravity casting, melts which have additives or inoculants added to them before the casting for reasons of nucleation are treated before they enter the mold in the casting stream, in the tundish and/or in the mold itself.
- According to the prior art, lumps of inoculant can be introduced, during the low-pressure casting, in the region of the mold runner in order to dissolve as the mold is filled. The disadvantage frequently associated with this is, in particular, that the inoculant in the metal melt is not distributed in a satisfactory manner in the casting mold. Different concentrations of the inoculant in the melt can result in considerable deviations in the desired properties of the cast pieces. This known technique requires careful adjustment of the composition and of the solution behavior of the inoculant.
- In order to minimize these disadvantages, it is an object of the invention to use a device and a process for low-pressure casting in such a way that the melt is already present with a uniformly distributed quantity of inoculant in an intermediate vessel, before the actual filling of the mold.
- According to the invention, the object is achieved by virtue of the fact that an intermediate vessel is arranged between the casting mold and the duct, an access point being provided in the intermediate vessel for the addition of an inoculant.
- The option of a separate access point for the addition of an inoculant to an intermediate vessel between the casting furnace and the casting mold makes it possible to feed a precisely set quantity of inoculant at the desired point in time in a simple manner.
- According to a preferred embodiment, an overflow wall is arranged inside the intermediate vessel. It has advantageously been shown that optimum distribution of the inoculant in the melt, in particular by the flow, is achieved when the inoculant is introduced upstream of the intermediate wall.
- Further possible embodiments are described hereinbelow.
- An exemplary embodiment is shown in the drawing.
-
FIG. 1 shows a sectional view of a furnace. - The
casting furnace 1 comprises afeed duct 2 for the filling operation withmetal melt 3. Thefeed duct 2 can be closed by means of acover 14. Afeed 6 is provided on thecasting furnace 1 in order to apply gas pressure to the melt. Furthermore, aduct 4 adjoined directly by theintermediate vessel 7 is fitted on thecasting furnace 1. Thecasting mold 5 is arranged above theintermediate vessel 7 and is connected to theintermediate vessel 7 by way of theriser 13 via theopening 11. Atubular attachment 15 for the addition of the inoculant 9 is fitted at theaccess point 8 to theintermediate vessel 7. Anoverflow wall 10 for themelt 3 is provided inside theintermediate vessel 7 and is arranged slightly downstream of the end of theduct 4. - The casting operation proceeds as follows:
- First of all, the
casting furnace 1 is filled withmetal melt 3 via thefeed duct 2. After thecasting furnace 1 has been filled, thefeed duct 2 is closed in a gas-tight manner by means of acover 14. The pressures p1, p2 and p3 correspond to atmospheric pressure. For the transport of iron into the intermediate vessel, thechamber 16 is subjected to the application of pressure with a gaseous medium. The pressure p1 is greater than the pressures p2 and p3. The melt begins to flow into theintermediate vessel 7 via theduct 4 and theoverflow wall 10. At the same time, the inoculant 9 is added via thetubular attachment 15. InFIG. 1 , the addition opening is arranged between theoverflow wall 10 and thecasting mold 5. It is likewise conceivable to add the inoculant 9 in theregion 17, i.e. upstream of theoverflow wall 10. The inoculant 9 is mixed homogeneously with themetal melt 3 owing to the flow of themetal melt 3. In order to fill thecasting mold 5, it is necessary to build up the pressure p2, which corresponds to the height ΔH. - After the mold has been filled, p2 is lowered to such an extent that the melt located outside the casting mold can flow back into the
intermediate vessel 7.
Claims (7)
1-6. (canceled)
7. An apparatus for the low pressure casting of metal melts, comprising:
a casting furnace having an inlet feed duct, an outlet duct and a feed for gaseous pressure application;
a casting mold downstream of the outlet duct;
an intermediate vessel located between the outlet duct and the casting mold; and
an access point to the intermediate vessel for the addition of an inoculant to the metal melt in the intermediate vessel.
8. The apparatus according to claim 7 , further including an overflow wall arranged in the intermediate vessel.
9. The apparatus according to claim 8 , wherein the access point for the inoculant is arranged upstream of the overflow wall.
10. The apparatus according to claim 7 , wherein the intermediate vessel has an opening and a riser is arranged inside the intermediate vessel at the opening and the casting mold is connected directly to the riser above the opening.
11. A process for the low pressure casting of metal melts, comprising:
providing a casting furnace having an inlet feed duct, an outlet duct and a feed for gaseous pressure application;
providing a casting mold downstream of the outlet duct;
providing an intermediate vessel located between the outlet duct and the casting mold;
providing an access point to the intermediate vessel for the addition of an inoculant to the metal melt in the intermediate vessel; and
introducing an inoculant into the metal melt in the intermediate vessel through the access point.
12. The process as claimed in claim 11 , including adding the inoculant in the form of granules.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07120039.8 | 2007-11-06 | ||
EP07120039A EP2060340A1 (en) | 2007-11-06 | 2007-11-06 | Device and method for low pressure die casting of metal melts |
PCT/EP2008/064895 WO2009059952A1 (en) | 2007-11-06 | 2008-11-04 | Device and method for low-pressure casting of metal melts |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100230066A1 true US20100230066A1 (en) | 2010-09-16 |
Family
ID=39032393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/741,127 Abandoned US20100230066A1 (en) | 2007-11-06 | 2008-11-04 | Device and method for low-pressure casting of metal melts |
Country Status (4)
Country | Link |
---|---|
US (1) | US20100230066A1 (en) |
EP (1) | EP2060340A1 (en) |
JP (1) | JP2011502787A (en) |
WO (1) | WO2009059952A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106392040A (en) * | 2016-11-26 | 2017-02-15 | 中信戴卡股份有限公司 | Communicating vessel type low-pressure casting holding furnace suitable for mold filling using mechanical pump |
CN107661971A (en) * | 2016-07-31 | 2018-02-06 | 浙江跃岭股份有限公司 | A kind of liquefying plant of low pressure casting aluminum alloy wheel hub |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5989266B2 (en) * | 2014-07-17 | 2016-09-07 | 株式会社トウネツ | Two-chamber type low pressure casting melt holding furnace |
CN104841894A (en) * | 2015-04-27 | 2015-08-19 | 乔治费歇尔汽车产品(昆山)有限公司 | Fast tempering process method for air-pressure pouring furnace |
KR101962871B1 (en) * | 2017-11-02 | 2019-03-28 | 삼영기계(주) | Inoculator |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4252173A (en) * | 1976-02-03 | 1981-02-24 | Societe De Vente De L'aluminium Pechiney | Low-pressure moulding process and apparatus |
US4431046A (en) * | 1979-12-15 | 1984-02-14 | Russ-Elektroofen Produktiongsgesellschaft Mbh & Co. | Automated low-pressure casting mechanism and method |
US4527608A (en) * | 1983-05-30 | 1985-07-09 | Pont-A-Mousson S.A. | Method for inoculating liquid metal cast under low pressure |
US5758706A (en) * | 1993-12-30 | 1998-06-02 | Sintercast Ab | Process control of compacted graphite iron production in pouring furnaces |
US5913358A (en) * | 1993-11-11 | 1999-06-22 | Hi-Tec Metals Ltd. | Casting apparatus and method |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1527054A (en) * | 1977-05-11 | 1978-10-04 | British Cast Iron Res Ass | Producing nodular graphite iron |
WO1980002659A1 (en) * | 1979-06-07 | 1980-12-11 | Mezger Ag Maschf Giesserei | Automatic adjusting servo-controlled device for injecting molten metal during a casting operation |
GB2069898A (en) * | 1980-02-26 | 1981-09-03 | Metal Research Corp | Inoculation to a molten cast iron during pouring |
JPS57134241A (en) * | 1981-02-13 | 1982-08-19 | Jidosha Imono Kk | Method for addition of inoculant |
DE10039877A1 (en) * | 2000-05-23 | 2001-11-29 | Wagner Heinrich Sinto Masch | Casting process for molten metal comprises adding a treatment agent and/or inoculant to the casting material in the form of a material block or encapsulated granulate |
JP2005095921A (en) | 2003-09-24 | 2005-04-14 | Ariake Serako Kk | Casting method and casting apparatus |
-
2007
- 2007-11-06 EP EP07120039A patent/EP2060340A1/en not_active Withdrawn
-
2008
- 2008-11-04 JP JP2010531542A patent/JP2011502787A/en not_active Withdrawn
- 2008-11-04 WO PCT/EP2008/064895 patent/WO2009059952A1/en active Application Filing
- 2008-11-04 US US12/741,127 patent/US20100230066A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4252173A (en) * | 1976-02-03 | 1981-02-24 | Societe De Vente De L'aluminium Pechiney | Low-pressure moulding process and apparatus |
US4431046A (en) * | 1979-12-15 | 1984-02-14 | Russ-Elektroofen Produktiongsgesellschaft Mbh & Co. | Automated low-pressure casting mechanism and method |
US4527608A (en) * | 1983-05-30 | 1985-07-09 | Pont-A-Mousson S.A. | Method for inoculating liquid metal cast under low pressure |
US5913358A (en) * | 1993-11-11 | 1999-06-22 | Hi-Tec Metals Ltd. | Casting apparatus and method |
US5758706A (en) * | 1993-12-30 | 1998-06-02 | Sintercast Ab | Process control of compacted graphite iron production in pouring furnaces |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107661971A (en) * | 2016-07-31 | 2018-02-06 | 浙江跃岭股份有限公司 | A kind of liquefying plant of low pressure casting aluminum alloy wheel hub |
CN106392040A (en) * | 2016-11-26 | 2017-02-15 | 中信戴卡股份有限公司 | Communicating vessel type low-pressure casting holding furnace suitable for mold filling using mechanical pump |
Also Published As
Publication number | Publication date |
---|---|
JP2011502787A (en) | 2011-01-27 |
WO2009059952A1 (en) | 2009-05-14 |
EP2060340A1 (en) | 2009-05-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GEORG FISCHER AUTOMOTIVE AG, SWITZERLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HAUKE, WILHELM;REEL/FRAME:024436/0892 Effective date: 20100503 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |