CN105855521A - Method and device for gravity casting of light alloy - Google Patents
Method and device for gravity casting of light alloy Download PDFInfo
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- CN105855521A CN105855521A CN201410192785.7A CN201410192785A CN105855521A CN 105855521 A CN105855521 A CN 105855521A CN 201410192785 A CN201410192785 A CN 201410192785A CN 105855521 A CN105855521 A CN 105855521A
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Abstract
The invention relates to a method and a device for gravity casting of light alloy. The method and the device are suitable to be used for large-scale thin-wall magnesium alloy and aluminum alloy high technological quality gravity casting molding. The implement method comprises: transferring overheating light alloy melt to a quantitative pouring cup on the top of a mould in vacuum or protective atmosphere through a gas shielding filled type thermal insulation casting pipe in a sealed manner; after temperature of the melt in the pouring cup is reduced to a technological requirement value, opening a pouring cup bottom plug to perform filled type bottom pouring filling on the mould; after pouring is completed, vacuum of a sealed cover being removed or the sealed cover being pressurized as needed, to make a casting solidify under pressure, to obtain magnesium alloy and aluminum alloy castings which are compact inside and do not have technological defects caused by casting and mold filling flow.
Description
Technical field
The present invention relates to gravity casting method and the device of a kind of light-alloy, it is adaptable to high technology quality gravitational casting large-scale, thin-wall Mg alloy, aluminium alloy shapes.Foundry goods is poured into a mould under vacuum or protective atmosphere and is filled type, solidification under pressure state, it is thus achieved that interior solid, nothing cast and mold filling flowing cause the magnesium alloy of defective workmanship, aluminium alloy castings.Belong to the casting field of light metal.
Background technology
In the gravitational casting forming process of existing light-alloy (referring mainly to magnesium alloy, aluminium alloy) component, the method typically toppled over smelting furnace, by the light-alloy melt transfer after refine, homoiothermic to casting ladle under atmospheric environment；After melt temperature is reduced to pouring temperature in band casting ladle, under atmospheric environment, casting mold is poured into a mould, pour into melt and flow through runner system to filling die cavity, then obtain foundry goods with type solidification.In the gravity casting process that this is traditional, problems with easily occurring: 1) high-temperature fusant contacts air and type cavity gas in transfer, cast and cavity filling process at any time, and wink i.e. forms oxide-film on melt flow surface；These oxide-films can be mixed into melt flow in melt transfer and flowing cavity filling process, reduces the degree of purity (the most so-called melt secondary pollution) filling type melt；2) type cavity gas in running channel is when watering beam instability and failing to be full of running channel, can be inhaled into melt flow, in addition to causing melt oxidation air-breathing, also forms gas hole defect at foundry goods；3) type cavity gas fills type flowing with surface filming and the two kinds of forms impacts of generation vapour lock and fills type quality, finally fills type position formation lack of fusion or/and be not fully filled defective workmanship finally；4) after filling type, foundry goods solidifies at ambient pressure, easily occurs loose and shrinkage cavity coagulation defect not because of feeding capacity.
The problems referred to above, except directly affecting process yield and the visual quality of casting that light-alloy casting produces, the existence that melt secondary pollution, pore, shrinkage cavity are loosened not only reduces the body mechanical property of foundry goods, also can develop into formation of crack under dynamic or fatigue load, significantly reduce the anti-fatigue performance of foundry goods.Therefore, for the gravitational casting of light-alloy, reduce and eliminate melt and shifting, pouring into a mould and the secondary pollution of cavity filling process, eliminate type cavity gas to filling the many adverse effects of type, it is provided that solidification feeding desirable pressure, be the key in technological quality inside and outside raising foundry goods.
This method and device are invented for solving the problems referred to above.
Summary of the invention
It is an object of the invention to provide gravity casting method and the device of a kind of light-alloy; effectively solve the secondary pollution of melt in Conventional gravity casting process and because of various defective workmanships produced by gas; make melt coagulation forming under vacuum or protective atmosphere; foundry goods even can be made to realize compression solidification under seal closure pressurising state, improve exterior quality in foundry goods comprehensively.
For achieving the above object; the technical scheme is that before light-alloy gravity-assist pouring; overheated light-alloy melt is pumped in the depositing (3) being connected with protective atmosphere from feed flow molten bath (1) by pouring pump (2); making Melt residence in the position close to depositing (3) upper outlet, sealed plunger (5) closes connection breaking depositing (3) and the connection of quantitative tundish (15)；When carrying out Foundry Production; first seal closure (8) evacuation or the injection protective gas to built-in casting mold (13); after vacuum in cover to be sealed (8) or protective gas concentration reach technological requirement; pouring mouth (4) is opened with salable cast passage (6) sealing device, is connected tundish (15); pouring pump (2) is with the speed of technological requirement; through salable cast passage (6), light-alloy melt is poured into quantitative tundish (15), and melt amount is monitored in real time by liquid level detector (7)；When melt temperature in quantitative tundish (15) is down to technological requirement temperature value, bottom plug (14) is opened, and the die cavity of casting mold (13) is carried out being full of formula rising pouring filling by light-alloy melt through quantitative tundish (15) bottom outlet；Immediately by salable vacuum and pressurization passageway (9) removal seal closure (8) interior vacuum or/and as required to seal closure (8) pressurising, make melt set Under Pressure Solidification.Casting mold (13) after seal closure (8) takes out cast or solidification; place into and treat casting type; complete the regulation of casting mold overhead quantitative tundish (15) station and to seal closure (8) evacuation or/and after filling protective atmosphere, the gravitational casting of light-alloy enters next process cycles.
The inventive method has the advantage that
1, depositing exit provides gas shield for light-alloy melt automatically, it can be ensured that water out Melt parity；
2, light-alloy melt completes cast under vacuum or protective atmosphere, fills type, effectively eliminates all kinds of defective workmanships produced because of melt secondary pollution and gas；
3, the light-alloy melt of casting complete is possible not only under vacuum or protective atmosphere solidification, also can pressurising in seal closure, it is achieved compression solidification, it is ensured that effectively feeding；
4, casting mold station actuator realizes walking in a horizontal state and the vertical lift of casting mold dividing plate, and then can be according to the station of the technological requirement regulation quantitative tundish of casting mold overhead.
5, melt transfer and casting process mechanization, intellectuality are realized, the charging with light-alloy furnace charge, fusing, refine Joint Implementation, it is achieved integrated, the automatization of light-alloy melting and gravitational casting.
Accompanying drawing illustrates:
Accompanying drawing is the principle schematic of the gravity-assist pouring method and device of a kind of light-alloy of the present invention.
In figure: 1 feed flow molten bath；2 pouring pumps；3 insulation depositings；4 pouring mouths；5 sealed plungers；6 salable cast passages；7 liquid level detectors；8 seal closures；9 vacuum and pressurization passageway；10 casting mold shelves；11 casting mold station actuators；12 teeming stages；13 casting molds；14 bottom plugs；15 quantitative tundish.
Claims (7)
1. the gravity casting method of a light-alloy and device; it is characterized in that the device realizing the method is by feed flow molten bath (1); pouring pump (2); the gas shield of band sealed plunger (5) pouring mouth (4) is full of formula insulation depositing (3); seal closure (8) with salable cast passage (6) and salable evacuation and pressurization passageway (9); the casting mold shelf (10) of band casting mold station actuator (11); casting mold (13); the quantitative tundish of the overhead (15) of band bottom plug (14), and liquid level detector (7) composition.
2. this device works in the following order and realizes the gravitational casting of light-alloy: pouring pump (2) by the overheated light-alloy melt in feed flow molten bath (1) by full formula insulation depositing (3), the pouring mouth (4) that is tightly connected and cast passage (6), quantitatively transfer under vacuum or protective atmosphere, overhead in the quantitative tundish (15) of casting mold (13), sealed plunger (5) and pour into a mould passage (6) orderly close-down immediately；When melt in quantitative tundish (15) is cooled to preset temperature value, bottom plug (14) is opened, and the die cavity of casting mold (13) is carried out being full of formula rising pouring filling by melt through quantitative tundish (15) bottom outlet；After stowing operation terminates, immediately by the vacuum in salable vacuum and pressurization passageway (9) removal seal closure (8) or/and as required to seal closure (8) pressurising, make melt complete solidification under setting pressure；The casting mold (13) after casting solidification is taken out from seal closure (8); place into and treat casting type; complete the regulation of casting mold overhead quantitative tundish (15) station and to seal closure (8) evacuation or/and after filling protective atmosphere, the gravitational casting of light-alloy enters next process cycles.
The gravity casting method of a kind of light-alloy the most according to claim 1 and device; it is characterized in that: before implementing light-alloy gravitational casting; after pouring mouth (4) and seal closure (8) are tightly connected by salable cast passage (6); light-alloy melt is pumped into atmosphere protection depositing (3) by pouring pump (2) from feed flow molten bath (1) middle and upper part; until liquid level arrives at the position close to pouring mouth (4), sealed plunger (5) turns off pouring mouth (4) and the connection of salable cast passage (6).
The gravity casting method of a kind of light-alloy the most according to claim 1 and device, it is characterized in that: when carrying out Foundry Production, first seal closure (8) evacuation or the injection protective gas to built-in casting mold (13), after vacuum in cover to be sealed (8) or protective gas concentration reach technological requirement, the sealing device order of cast passage (6) and pouring mouth (4) is opened, pouring pump (2) is with the speed of technological requirement, by in the overheated light-alloy melt transfer in feed flow molten bath (1) to quantitative tundish (15), transfer melt amount is monitored in real time by liquid level detector (7).
The gravity casting method of a kind of light-alloy the most according to claim 1 and device, it is characterized in that: when the melt temperature in quantitative tundish (15) is down to technological requirement temperature value, bottom plug (14) is opened, and the die cavity of casting mold (13) is carried out being full of formula rising pouring filling by light-alloy melt through quantitative tundish (15) bottom outlet.
The gravity casting method of a kind of light-alloy the most according to claim 1 and device, it is characterized in that: the casting mold (13) after cast can continue to stay and solidifies under the vacuum of seal closure (8) or inert atmosphere, also can be by salable vacuum and pressurization passageway (9) removal seal closure (8) interior vacuum and the light-alloy melt in built-in casting mold (13) die cavity can be made at the setting Under Pressure Solidification equal to or higher than atmospheric pressure as required to seal closure (8) pressurising.
The gravity casting method of a kind of light-alloy the most according to claim 1 and device, it is characterized in that: casting mold station actuator (11) under casting mold shelf (10) can realize walking in a horizontal state and the vertical lift of casting mold shelf (10), in order to according to the station of the technological requirement regulation quantitative tundish of casting mold (13) overhead (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410192785.7A CN105855521A (en) | 2014-05-09 | 2014-05-09 | Method and device for gravity casting of light alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410192785.7A CN105855521A (en) | 2014-05-09 | 2014-05-09 | Method and device for gravity casting of light alloy |
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| CN105855521A true CN105855521A (en) | 2016-08-17 |
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| CN201410192785.7A Pending CN105855521A (en) | 2014-05-09 | 2014-05-09 | Method and device for gravity casting of light alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493340A (en) * | 2016-11-29 | 2017-03-15 | 太原科技大学 | A kind of novel magnesium alloy casting turns liquid system and device |
| WO2018040654A1 (en) * | 2016-08-29 | 2018-03-08 | 常州市蓝托金属制品有限公司 | Vacuum die-casting process for manufacturing aluminium alloy |
| CN112191824A (en) * | 2020-12-07 | 2021-01-08 | 山东普越能源科技有限公司 | Metal solution casting device for casting explosion-proof shell of mining LED roadway lamp |
| CN113857469A (en) * | 2021-10-22 | 2021-12-31 | 台山市天丞汽车配件有限公司 | Gravity casting equipment |
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| CN1597187A (en) * | 2004-08-05 | 2005-03-23 | 南昌航空工业学院 | Casting method of vacuum thin wall |
| CN101108415A (en) * | 2007-06-28 | 2008-01-23 | 济南铸锻所捷迈机械有限公司 | Aluminum alloy vacuum casting device |
| CN201127988Y (en) * | 2007-10-24 | 2008-10-08 | 曾奇中 | High-pressure casting mold capable of improving low-pressure casting machine into high-pressure casting machine |
| CN101668601A (en) * | 2007-10-26 | 2010-03-10 | 国际铸造技术公司 | Cast metallic article |
| US20130000862A1 (en) * | 2011-03-30 | 2013-01-03 | General Electric Company | Casting methods and apparatus |
| CN102909357A (en) * | 2012-10-31 | 2013-02-06 | 重庆硕龙科技有限公司 | Quantitative pouring method of light alloy melt |
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2014
- 2014-05-09 CN CN201410192785.7A patent/CN105855521A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597187A (en) * | 2004-08-05 | 2005-03-23 | 南昌航空工业学院 | Casting method of vacuum thin wall |
| CN101108415A (en) * | 2007-06-28 | 2008-01-23 | 济南铸锻所捷迈机械有限公司 | Aluminum alloy vacuum casting device |
| CN201127988Y (en) * | 2007-10-24 | 2008-10-08 | 曾奇中 | High-pressure casting mold capable of improving low-pressure casting machine into high-pressure casting machine |
| CN101668601A (en) * | 2007-10-26 | 2010-03-10 | 国际铸造技术公司 | Cast metallic article |
| US20130000862A1 (en) * | 2011-03-30 | 2013-01-03 | General Electric Company | Casting methods and apparatus |
| CN102909357A (en) * | 2012-10-31 | 2013-02-06 | 重庆硕龙科技有限公司 | Quantitative pouring method of light alloy melt |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018040654A1 (en) * | 2016-08-29 | 2018-03-08 | 常州市蓝托金属制品有限公司 | Vacuum die-casting process for manufacturing aluminium alloy |
| CN106493340A (en) * | 2016-11-29 | 2017-03-15 | 太原科技大学 | A kind of novel magnesium alloy casting turns liquid system and device |
| CN106493340B (en) * | 2016-11-29 | 2018-10-26 | 太原科技大学 | A kind of roll-casting of magnesium alloy turns liquid system and device |
| CN112191824A (en) * | 2020-12-07 | 2021-01-08 | 山东普越能源科技有限公司 | Metal solution casting device for casting explosion-proof shell of mining LED roadway lamp |
| CN112191824B (en) * | 2020-12-07 | 2021-02-26 | 山东普越能源科技有限公司 | Metal solution casting device for casting explosion-proof shell of mining LED roadway lamp |
| CN113857469A (en) * | 2021-10-22 | 2021-12-31 | 台山市天丞汽车配件有限公司 | Gravity casting equipment |
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Application publication date: 20160817 |