CN102380608A - Aluminum alloy casting method - Google Patents
Aluminum alloy casting method Download PDFInfo
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- CN102380608A CN102380608A CN2010102694555A CN201010269455A CN102380608A CN 102380608 A CN102380608 A CN 102380608A CN 2010102694555 A CN2010102694555 A CN 2010102694555A CN 201010269455 A CN201010269455 A CN 201010269455A CN 102380608 A CN102380608 A CN 102380608A
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Abstract
The invention provides an aluminum alloy casting method. Compared with an ordinary low-pressure casting process, a feeder head-free gravity casting, boosting and crystalizing process has the advantages of reduction in the aluminum liquid consumption, no shrinkage, loosening or pin hole of a cast, dense structure, increase in the mechanical property and capability of producing high-quality shells, tanks and the like which meet the requirements of the power industry, have high airtightness and bear high pressures.
Description
Technical field
The present invention relates to a kind of metal casting method, especially relate to a kind of method for casting aluminium alloy.
Background technology:
Casting is divided into gravitational casting and compression casting by the pouring technology of molten metal.Gravitational casting is meant that molten metal injects the technology of casting mold under the terrestrial gravitation effect, also claims casting.Gravitational casting comprises sand casting, metal mold casting, model casting, lost foam casting, mud die cast etc.; Compression casting is meant that molten metal injects the technology of casting mold under other external force (not containing gravity) effect.Compression casting comprises compression casting and vacuum pressing and casting, low pressure casting, centrifugal casting of die casting machine etc.
Gravitational casting is to rely on the self gravitation of molten metal to inject casting mold and flow at die cavity, aluminium liquid mobile poor, and the feeding capacity of foundry goods is lower, is easy to generate defectives such as shrinkage cavity, shrinkage porosite.
My company adopts low pressure casting at present; Its technical process is: in the crucible of sealing, feed dry compressed air, molten metal is under the effect of gas pressure; Rise along stalk; Get into die cavity reposefully through cast gate, and keep the gas pressure on the liquid level in the crucible, till foundry goods solidifies fully.Remove the gas pressure on the liquid level then, make that not solidified molten metal is back to crucible in the stalk, again open form and release foundry goods.Under stress cast, improved the flowability of aluminium liquid, the feeding capacity of foundry goods increases than the traditional gravity cast.
The weak point of low pressure die casting is the difficult control of quality of aluminum alloy casting parts of producing, and is easy to generate shrinkage porosite, loose and pin hole; The aluminium liquid that running channel expends is more, and this part aluminium block impurity is more, can not melt down recycle, causes raw-material serious waste, and artificial cutting polishing is consuming time also longer.
Summary of the invention
The purpose of this invention is to provide a kind of method for casting aluminium alloy, compare with general low pressure casting, use this method Birmasil foundry goods, aluminium liquid consumption reduces 40%-60%, and can solve quality problems such as shrinkage porosite, loose and pin hole.
For solving the problems of the technologies described above, method for casting aluminium alloy of the present invention comprises following processing step:
(1), molding, make sand mold according to the foundry goods shape, and sand mold carried out coating handle;
(2), mould assembly, last drag box mould assembly and fastening last lower box with securing member, described sandbox is provided with cast gate and steam vent, and rising head is not set;
(3), aluminium alloy smelting;
(4), gravity casting, pour aluminium alloy liquid into die cavity from the cast gate of sandbox, and leave the feeding liquid of certain altitude at cast gate;
(5), the supercharging crystallization, after gravity casting is accomplished, rapidly sandbox is placed pressure vessel, pressure vessel boosts to the 0.5mpa-1mpa working pressure range at 0-12 in second, sandbox in working pressure range pressurize 6-15 minute;
(6), behind the pressure vessel release pressure, take out sandbox, cool off naturally.
Method for casting aluminium alloy of the present invention adopts no rising head gravity casting, compares with general low pressure casting, because there is not running channel, so aluminium liquid consumption reduces; After gravity casting is accomplished, rapidly sandbox is placed pressure vessel, and give vessel pressurization; Make to keep higher pressure in the container, aluminium liquid is under high pressure, and flowability improves; Can discharge the gas that is dissolved in the aluminium liquid, sandbox is pressurize a period of time under the pressure of certain limit, and feeding aluminium liquid crystallization and freezing constantly is provided; So the foundry goods of producing does not have shrinkage porosite, loose and pin hole, dense structure, mechanical performance improves.
The specific embodiment
(1), molding, make sand mold according to the foundry goods shape, and sand mold carried out coating handle;
(2), mould assembly, last drag box mould assembly and fastening last lower box with securing member, described sandbox is provided with cast gate and steam vent, and rising head is not set;
(3), aluminium alloy smelting;
(4), gravity casting, pour aluminium alloy liquid into die cavity from the cast gate of sandbox, and leave the feeding liquid of certain altitude at cast gate;
(5), the supercharging crystallization, after gravity casting is accomplished, rapidly sandbox is placed pressure vessel, pressure vessel boosted to the 0.6mpa-0.8mpa working pressure range in 8 seconds, sandbox is 10 fens clock times of pressurize in working pressure range;
(6), behind the pressure vessel release pressure, take out sandbox, cool off naturally.
Compare with general low pressure casting; Aluminium liquid consumption reduces 40%-60% in casting process, the foundry goods of producing do not contract give, loose and pin hole, dense structure; Mechanical performance improves, and can produce the high-air-tightness of quality power industry requirement, the housing that bears high pressure, tank body etc.
Claims (3)
1. method for casting aluminium alloy is characterized in that may further comprise the steps:
(1), molding, make sand mold according to the foundry goods shape, and sand mold carried out coating handle;
(2), mould assembly, last drag box mould assembly and fastening last lower box with securing member, described sandbox is provided with cast gate and steam vent, and rising head is not set;
(3), aluminium alloy smelting;
(4), gravity casting, pour aluminium alloy liquid into die cavity from the cast gate of sandbox, and leave the feeding liquid of certain altitude at cast gate;
(5), the supercharging crystallization, after gravity casting is accomplished, rapidly sandbox is placed pressure vessel, pressure vessel boosts to the 0.5mpa-1mpa working pressure range at 0-12 in second, sandbox in working pressure range pressurize 6-15 minute;
(6), behind the pressure vessel release pressure, take out sandbox, cool off naturally.
2. method for casting aluminium alloy according to claim 1 is characterized in that: said pressure vessel pressure rising time is 0-8 second.
3. method for casting aluminium alloy according to claim 1 and 2 is characterized in that: described working pressure range is 0.6mpa-0.8mpa, and the described dwell time is 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102694555A CN102380608A (en) | 2010-08-30 | 2010-08-30 | Aluminum alloy casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102694555A CN102380608A (en) | 2010-08-30 | 2010-08-30 | Aluminum alloy casting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102380608A true CN102380608A (en) | 2012-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102694555A Pending CN102380608A (en) | 2010-08-30 | 2010-08-30 | Aluminum alloy casting method |
Country Status (1)
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| CN (1) | CN102380608A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814465A (en) * | 2012-04-06 | 2012-12-12 | 河北锐利机械科技有限公司 | Spheroidal graphite cast iron casting mould and riser-free casting method adopting same |
| CN103350215A (en) * | 2013-06-20 | 2013-10-16 | 东营嘉扬精密金属有限公司 | Production process for solving pin hole problem of cast aluminum alloy |
| CN106001516A (en) * | 2016-06-23 | 2016-10-12 | 无锡康柏斯机械科技有限公司 | Technology for manufacturing hub through pouring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5058653A (en) * | 1986-11-17 | 1991-10-22 | Aluminium Pechiney | Process for lost foam casting of metal parts |
| EP0461052A1 (en) * | 1990-06-07 | 1991-12-11 | Aluminium Pechiney | Lost foam low-pressure casting of aluminium-alloy pieces |
| CN1059302A (en) * | 1990-09-01 | 1992-03-11 | 皮奇尼铅公司 | Process for lost-foam casting, under pressure, of metal articles |
| US6024157A (en) * | 1997-11-21 | 2000-02-15 | Brunswick Corporation | Method of casting hypereutectic aluminum-silicon alloys using an evaporable foam pattern and pressure |
| CN101474668A (en) * | 2009-01-13 | 2009-07-08 | 通州市四安球墨铸铁有限公司 | Aluminum alloy casting method |
-
2010
- 2010-08-30 CN CN2010102694555A patent/CN102380608A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5058653A (en) * | 1986-11-17 | 1991-10-22 | Aluminium Pechiney | Process for lost foam casting of metal parts |
| EP0461052A1 (en) * | 1990-06-07 | 1991-12-11 | Aluminium Pechiney | Lost foam low-pressure casting of aluminium-alloy pieces |
| CN1059302A (en) * | 1990-09-01 | 1992-03-11 | 皮奇尼铅公司 | Process for lost-foam casting, under pressure, of metal articles |
| US6024157A (en) * | 1997-11-21 | 2000-02-15 | Brunswick Corporation | Method of casting hypereutectic aluminum-silicon alloys using an evaporable foam pattern and pressure |
| CN101474668A (en) * | 2009-01-13 | 2009-07-08 | 通州市四安球墨铸铁有限公司 | Aluminum alloy casting method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814465A (en) * | 2012-04-06 | 2012-12-12 | 河北锐利机械科技有限公司 | Spheroidal graphite cast iron casting mould and riser-free casting method adopting same |
| CN102814465B (en) * | 2012-04-06 | 2015-01-28 | 河北锐利机械科技有限公司 | Spheroidal graphite cast iron casting mould and riser-free casting method adopting same |
| CN103350215A (en) * | 2013-06-20 | 2013-10-16 | 东营嘉扬精密金属有限公司 | Production process for solving pin hole problem of cast aluminum alloy |
| CN103350215B (en) * | 2013-06-20 | 2015-12-23 | 东营嘉扬精密金属有限公司 | A kind of production technology solving Birmasil pin hole problems |
| CN106001516A (en) * | 2016-06-23 | 2016-10-12 | 无锡康柏斯机械科技有限公司 | Technology for manufacturing hub through pouring method |
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Application publication date: 20120321 |