EP0588266B1 - Method and apparatus for producing metal objects - Google Patents
Method and apparatus for producing metal objects Download PDFInfo
- Publication number
- EP0588266B1 EP0588266B1 EP19930114609 EP93114609A EP0588266B1 EP 0588266 B1 EP0588266 B1 EP 0588266B1 EP 19930114609 EP19930114609 EP 19930114609 EP 93114609 A EP93114609 A EP 93114609A EP 0588266 B1 EP0588266 B1 EP 0588266B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- main metal
- fed
- metal
- alloy
- batching
- 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
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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
- B22D5/00—Machines or plants for pig or like casting
Definitions
- the present invention relates to a method and apparatus for producing alloy metal objects, advantageously of a standard weight, by means of casting, according to the preamble of claims 1, 5 and 9, respectively.
- alloy ingredients are added to the main metal flow after smelting the main metal.
- the alloy ingredients are usually added, in connection with the smelting of the main metal, to the same smelting furnace in solid state.
- an analysis sample Prior to the casting, an analysis sample must be taken from the smelting furnace in order to define the right composition, which operation essentially increases the duration of the casting cycle.
- the furnace Prior to the casting, if several alloys containing different alloy ingredients are desired to be cast in the same smelting furnace, the furnace must essentially be completely emptied in order to prevent any mixing of the respective alloys.
- DE-A 23 16 045 discloses a method according to the preamble of claim 1.
- the main metal and alloy metals are added to a mixing furnace, i.e. to melting furnace.
- the disadvantage of this device is that for each new alloy to be produced the mixing furnace has to be properly cleaned.
- US-4,436,142 mentions the addition of a nodulizing agent to obtain ductile iron castings.
- the nodulizing agent causes graphite which is ordinarily present in gray iron castings in flake form to assume a nodular or spheroidal form.
- a disadvantage of the nodulizing agents is a low-boiling point which leads to serious difficulties which may result in violent pyrotechnic reactions.
- JP-A-57-134241 discloses an arrangement wherein inoculant material is added to a batched main masse flow between batching member and the molt .
- inoculant material is added to a batched main masse flow between batching member and the molt .
- the addition of materials between the batching member and the mold may lead to inhomogenities in the casted metal mixture.
- the object of the present invention is to eliminate some of the drawbacks of the prior art and to achieve an improved and peratively more secure method and apparatus for producing alloy metal objects, essential of a standard weight, by casting so that different alloys can be cast under usage of one smelting furnace without an essential break in the production.
- the essential novel features of the invention are apparent from the appended patent claims 1, 5 and 9.
- Advantageous embodiments of the invention are subject matter of the corresponding subclaims.
- molten metal from the smelting furnace of the main metal, there is conducted molten metal, advantageously at a rate allowed by the smelting capacity of the furnace, to at least one connecting channel provided in between the smelting furnace and the molten metal batching member, which connecting channel can be moved in the transversal and vertical directions.
- the amount of molten metal to be conducted into the connecting channel is adjusted by means of control members, so that an essentially continuous feeding of molten metal from the smelting furnace into the connecting channel is achieved.
- the metals to be alloyed which can be one or several, are conducted in desired quantities to the molten flow in between the smelting furnace and the casting mold, so that the control members adjusting the main metal flow also are advantageously used for adjusting the feeding quantities of the alloy metal or metals, according to the desired alloy ratio and the weight of the metal object to be cast.
- the alloy metals can be conducted into the main metal flow either in molten or solid state, either into the connecting channel in between the smelting furnace and the molten metal batching member, or directly into the molten metal batching member.
- the molten metal is conducted to the batching member advantageously so, that the connecting channel is shifted vertically downwards by means of shifting members, and the melt begins to flow from the connecting channel to the batching member of the casting mold.
- the feeding rate of the melt from the smelting furnace to the connecting channel and respectively the feeding rate of the alloy metals to the batching member if can be increased.
- the feeding of the melt from the connecting channel to the batching member, and the resulting turbulence of the metal alloy advantageously intensifies the mixing of the metal alloy in an advantageous fashion.
- the batching member receives the molten metal flow fed from the connecting channel, and possibly also at least one alloy metal flow fed directly into the batching member.
- a small amount of the said metal alloy is advantageously left in the batching member from the previous casting cycle, so that there can advantageously be taken into account for instance metal losses caused by splashing of the molten metal, as well as metal losses caused by its sticking to the bottom of the batching member.
- a new charge of molten metal corresponding to the weight of the metal object to be cast, is fed into the batching member. If the metal alloy to be cast should be changed, to the batching member there is fed alloyed molten metal only as much as is necessary in order to make the melt quantity contained in the batching member to correspond to the weight of the metal object to be cast.
- the melt flow into the batching member is stopped, advantageously for instance by lifting the connecting channel and the alloy metal feeding members to their top position.
- the alloyed melt corresponding in quantity to the object to be cast is conducted into a casting mold by tilting the batching member. Only if the metal alloy to be cast should be changed, the batching member is emptied altogether, otherwise a small amount of the alloyed molten metal to be cast is advantageously left in the batching member as a base charge.
- the feeding of the main metal in the metal object to be cast from the smelting furnace to at least one connecting channel in between the smelting furnace and the batching member is advantageously carried out in two successive stages, so that when the connecting channel is in its lifted position, and thus the melt does not flow into the batching member, only molten main metal is fed into the connecting channel.
- the connecting channel advantageously serves as an intermediate tank for the molten main metal, in which case a separate intermediate tank is not needed, and thus one slag-forming transfer of the melt from one tank to another is avoided.
- the connecting channel is in its low position, so that the melt flows from the connecting channel to the batching member, the feeding rate of the molten main metal from the smelting furnace into the connecting channel is increased.
- the feeding of the alloy ingredient or ingredients is switched on, and the alloy ingredients are fed either in solid or molten state to the main metal flow contained in the connecting channel, or directly to the batching member.
- the main metal flow in the smelting furnace remains clear of the alloy ingredients, and the metal alloy to be cast can be changed simply by changing either the quantity of the alloy ingredient, the alloy ratio or the alloy ingredient, and by feeding the alloy ingredient or ingredients from the smelting furnace to the main metal flow that is already removed from the smelting furnace, in between the smelting furnace and the casting mold.
- the feeding of the alloy ingredient or ingredients to the connecting channel advantageously starts the alloying of the main metal flow already prior to the batching member.
- the alloy ingredient quantity, alloy ratio or alloy ingredient of the metal object can be changed essentially without a break in the production.
- each metal object accurately contains a desired amount of alloy metals, and the metal object is essentially accurately of the desired weight.
- the alloy ingredient quantity, alloy ratio or alloy ingredients there are not created incorrectly alloyed metal objects, and thus the analysis samples become essentially unnecessary.
- the need for space and labour is essentially reduced. Owing to its simplicity, the apparatus requires an essentially small amount of building and installation work in the production facilities, and thus the apparatus is installable essentially rapidly, which increases the applicability of the method and apparatus of the invention.
- the main metal in the metal object to be alloyed is smelted in the smelting furnace 1.
- the smelted main metal is conducted to the connecting channel 2 advantageously by means of a pump 3, and the molten flow passing therethrough can advantageously be adjusted to be suitable for the capacity of the smelting furnace 1.
- the quantity of the melt fed into the connecting channel 2 by the pump 3 is adjusted by means of the control member 4.
- the melt feeding rate is adjusted so that when the connecting channel 2 is in its top position, i.e. during the unloading stage of the batching member 5, the melt feeding rate is advantageously maintained such that only a small amount of melt flows into the chute-like connecting channel 2.
- the connecting channel 2 when the connecting channel 2 is in its low position, i.e. during the filling stage of the batching members 5, the melt feeding rate is increased, and essentially simultaneously with an increase in the feeding rate, the feeding of alloy ingredients into the connecting channel 2 is begun.
- One of the alloy ingredients is first smelted in the alloy ingredient smelting furnace 6, and a desired quantity of alloy ingredient per one metal object is conducted via the alloy ingredient batching member 7 to the connecting channel, whereas a desired amount of the second alloy ingredient to be fed in solid state is fed via the alloy ingredient feeder 8 to the molten metal flowing in the connecting channel 2.
- the feeding of the alloy ingredients to the connecting channel 2 is also advantageously conducted by means of the same control member 4.
- the alloyed molten metal is conducted in batches and in standard charges to the batching member 5.
- the standard charge essentially corresponds to the weight of the metal object to be cast.
- the method of the invention in the first batching after changing the alloying of the metal object, into the batching member 5 there is, however, fed a batch which corresponds to the weight of the metal object to be cast plus the base charge left in the batching member 5 after unloading the same. This base charge is removed in connection with the last unloading of the batching member 5, which takes place prior to changing the alloying of the metal object.
- a quantity of the alloyed molten metal corresponding to the weight of the metal object to be cast is discharged into the casting mold 9.
- the casting molds 9 can also be located immovably, advantageously in a curved configuration, so that the batching member 5 is located turnably in the center of the circle pertaining to the said curve.
- the batching member 5 can advantageously be common for two or several connecting channels 2.
- the batching member 5 can advantageously be common for two or several connecting channels 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI924112 | 1992-09-14 | ||
| FI924112A FI95671C (fi) | 1992-09-14 | 1992-09-14 | Menetelmä ja laitteisto metallikappaleen valmistamiseksi |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0588266A1 EP0588266A1 (en) | 1994-03-23 |
| EP0588266B1 true EP0588266B1 (en) | 1999-06-09 |
Family
ID=8535862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19930114609 Expired - Lifetime EP0588266B1 (en) | 1992-09-14 | 1993-09-10 | Method and apparatus for producing metal objects |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0588266B1 (fi) |
| JP (1) | JP3513190B2 (fi) |
| AU (1) | AU676486B2 (fi) |
| CA (1) | CA2105850A1 (fi) |
| DE (1) | DE69325219T2 (fi) |
| FI (1) | FI95671C (fi) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20075949L (fi) * | 2007-12-21 | 2009-06-22 | Outotec Oyj | Järjestely anodivalulaitoksessa kuparianodien valamiseksi |
| DE102014104509A1 (de) * | 2014-03-31 | 2015-10-01 | Thyssenkrupp Ag | Vorrichtung und Verfahren zur Reinigung einer Schmelze und Schmelztauchbeschichtungsanlage |
| ITUA20162690A1 (it) * | 2016-04-18 | 2017-10-18 | Fonderia Ghirlandina Spa | Impianto di fonderia per la realizzazione di getti in ghisa |
| CN111534707A (zh) * | 2020-04-07 | 2020-08-14 | 浙江顺虎铝业有限公司 | 一种高精度耐磨铝合金材料的一体化生产设备 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE122573C (fi) * | ||||
| JPS5120293B2 (fi) * | 1972-04-01 | 1976-06-24 | ||
| WO1980002659A1 (fr) * | 1979-06-07 | 1980-12-11 | Mezger Ag Maschf Giesserei | Dispositif de reglage automatique par asservissement pour l'inoculation du metal fondu lors d'une operation de coulee |
| JPS57134241A (en) * | 1981-02-13 | 1982-08-19 | Jidosha Imono Kk | Method for addition of inoculant |
| US4436142A (en) * | 1981-11-09 | 1984-03-13 | Harvey Hubbell Incorporated | Method and apparatus for making ductile iron castings |
-
1992
- 1992-09-14 FI FI924112A patent/FI95671C/fi active
-
1993
- 1993-09-09 CA CA 2105850 patent/CA2105850A1/en not_active Abandoned
- 1993-09-10 DE DE1993625219 patent/DE69325219T2/de not_active Expired - Fee Related
- 1993-09-10 EP EP19930114609 patent/EP0588266B1/en not_active Expired - Lifetime
- 1993-09-13 AU AU46285/93A patent/AU676486B2/en not_active Ceased
- 1993-09-14 JP JP25099193A patent/JP3513190B2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE69325219T2 (de) | 1999-09-30 |
| FI95671C (fi) | 1996-03-11 |
| CA2105850A1 (en) | 1994-03-15 |
| JPH06262300A (ja) | 1994-09-20 |
| FI924112A (fi) | 1994-03-15 |
| FI95671B (fi) | 1995-11-30 |
| EP0588266A1 (en) | 1994-03-23 |
| JP3513190B2 (ja) | 2004-03-31 |
| AU4628593A (en) | 1994-03-24 |
| AU676486B2 (en) | 1997-03-13 |
| FI924112A0 (fi) | 1992-09-14 |
| DE69325219D1 (de) | 1999-07-15 |
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