CN103691907A - Low-pressure casting device and low-pressure casting process - Google Patents
Low-pressure casting device and low-pressure casting process Download PDFInfo
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- CN103691907A CN103691907A CN201310689231.3A CN201310689231A CN103691907A CN 103691907 A CN103691907 A CN 103691907A CN 201310689231 A CN201310689231 A CN 201310689231A CN 103691907 A CN103691907 A CN 103691907A
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Abstract
The invention discloses a low-pressure casting device. The low-pressure casting device comprises a die closed pressurizing inflating chamber, a die arranged in the die closed pressurizing inflating camber, and an inert gas storing tank communicated with the die closed pressurizing inflating chamber by an air pipe. According to the low-pressure casting device, the mobility of molten aluminum is improved, the oxidated slag defects formed in the mold filling process is effectively reduced or avoided, the yield rate is finally improved by 4-5%, and the invention also discloses a low-pressure casting process.
Description
Technical field
The present invention relates to casting mould technical field, more particularly, relate to a kind of low-pressure casting apparatus and low-pressure casting process.
Background technology
Traditional low pressure casting mode is under the effect lower than 1 atmospheric pressure, aluminium liquid rises and enters mold cavity by cast gate along stalk, and complete casting solidification under the condition that keeps gas pressure, then the gas pressure in removal container, not solidified aluminium liquid in stalk and cast gate is got back in holding furnace, and the aluminium liquid having solidified forms required foundry goods in casting mold.
In low pressure casting process, be full of air in mold cavity, aluminium liquid forming process completes in air atmosphere, aluminium is active metal, easily, with the airborne oxygen generation oxidation impurities that reacts, oxidation impurities is set in foundry goods and has just formed slag inclusion, directly has influence on the strength character of product.
Therefore, the oxide inclusion defects that how to reduce or avoid forming in cavity filling process, becomes the current technical issues that need to address of those skilled in the art.
Summary of the invention
In view of this, the invention provides a kind of low-pressure casting apparatus and low-pressure casting process, with the oxide inclusion defects that reduces or avoid forming in cavity filling process.
For realizing the above object, the invention provides following technical scheme:
A low-pressure casting apparatus, comprising:
The airtight pressurization plenum chamber of mould;
Be arranged at the mould in the airtight pressurization plenum chamber of described mould;
Inert gas holding vessel, described inert gas holding vessel is communicated with by tracheae with the airtight pressurization plenum chamber of described mould.
Preferably, in above-mentioned low-pressure casting apparatus, described mould comprises:
Base;
Be arranged at the bed die on described base;
Limit mould, described limit mould is four, and is arranged at symmetrically between two on described bed die;
Be arranged at the backform of described limit mould upside.
Preferably, in above-mentioned low-pressure casting apparatus, described limit mould drives mobile by the limit mould oil cylinder being arranged on described base.
Preferably, in above-mentioned low-pressure casting apparatus, the upside of described backform is provided with top template, and described backform is moved by the backform hydraulic oil cylinder driving being arranged on described base, described backform oil cylinder is connected with described top template, is positioned at the top of described top template for the stripper oil cylinder of the demoulding.
Preferably, in above-mentioned low-pressure casting apparatus, described bed die, Bian Mo and described backform are all connected with cooling system.
Preferably, in above-mentioned low-pressure casting apparatus, described cooling system comprises:
Be positioned at the cooling curtain of aqueous vapor annular of the wheel rim position of described mould;
Be positioned at the spoke of described mould and the annular wind cooling tube of wheel rim and spoke thermal center position;
Be positioned at the wheel disc of described mould and minute water cone of rising head position.
A low-pressure casting process, comprises step:
1) front the first Preset Time of die sinking passes into inert gas to the airtight pressurization plenum chamber of mould, and gas pressure is 0.8-1.0 atmospheric pressure, and inflationtime is the second Preset Time;
2) after die sinking, the 3rd Preset Time passes into inert gas to the airtight pressurization plenum chamber of mould, and gas pressure is 0.8-1.0 atmospheric pressure, and inflationtime is the 4th Preset Time;
3), before matched moulds, clean out each mold cavity;
4) on the rising head of bed die, put screen pack, then by casting ladle, carry out quantitative pouring, guarantee that the temperature of casting ladle and cup is 450 500 ° of C;
5) by limit mould oil cylinder, promote each limit mould, when position, by the descending backform of backform oil cylinder, after putting in place, left and right combination up and down again, guarantees to put in place;
6) control the height that fills type and rising head, make the height of rising head over the height of wheel rim on wheel;
7) cooling end, cutoff high source of the gas, first moves back limit mould, then starts backform and rises with wheel, catches wheel then send to cooling with fitting dish;
8) cleaning wheel overlap, and do wheel mass evaluation, comprise surface quality, pressurization situation, and adjust accordingly the technological parameter of next round operation;
9) whether X-ray examination wheel has the defects such as shrinkage porosite, pore, slag inclusion.
Technical scheme from the above can be found out; low-pressure casting apparatus provided by the invention; by inert gas injecting in mould and die cavity; make aluminium liquid in casting, in forming process completely in the atmosphere in inert gas shielding; isolated air contacts with aluminium liquid, the oxide inclusion defects that effectively reduces or avoided forming in cavity filling process.Present device features simple and practical process, small investment cost is low, and technological preparation is identical with metal mold technique with technical process, and just many one passes into inert gas operation at the airtight pressurization plenum chamber of mould, and whole technical process is simple, easily operation.The present invention has improved aluminium liquid mobility, and the oxide inclusion defects that effectively reduces or avoided forming in cavity filling process finally makes yields improve 4～5%.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below by embodiment or prior art are retouched described in the accompanying drawing of required use be briefly described, apparently, the accompanying drawing of retouching below in described is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the low-pressure casting apparatus that Fig. 1 provides for the embodiment of the present invention.
The specific embodiment
The invention discloses a kind of low-pressure casting apparatus and low-pressure casting process, with the oxide inclusion defects that reduces or avoid forming in cavity filling process.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, described in the technical scheme in the embodiment of the present invention is retouched clearly and completely, obviously, the described embodiment that retouches is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, the structural representation of the low-pressure casting apparatus that Fig. 1 provides for the embodiment of the present invention.
The low-pressure casting apparatus that the embodiment of the present invention provides, comprises the airtight pressurization plenum chamber 103 of mould, mould and inert gas holding vessel 101.
Wherein, mould is arranged in the airtight pressurization plenum chamber 103 of mould, and inert gas holding vessel 101 is communicated with by tracheae 102 with the airtight pressurization plenum chamber 103 of mould, and inert gas holding vessel 101 can pass in the airtight pressurization plenum chamber 103 of mould by tracheae 102.
Low-pressure casting apparatus provided by the invention; by inert gas injecting in mould and die cavity; make aluminium liquid in the complete atmosphere in inert gas shielding, completely cut off air and contact with aluminium liquid, the oxide inclusion defects that effectively reduces or avoided forming in cavity filling process in casting, forming process.Present device features simple and practical process, small investment cost is low, and technological preparation is identical with metal mold technique with technical process, and just many one passes into inert gas operation at the airtight pressurization plenum chamber of mould, and whole technical process is simple, easily operation.The present invention has improved aluminium liquid mobility, and the oxide inclusion defects that effectively reduces or avoided forming in cavity filling process finally makes yields improve 4～5%.
In the present invention's one specific embodiment, mould comprises base 111, bed die 110, limit mould 108 and backform 107.Bed die 110 is arranged on base 111, and limit mould 108 is four, and is arranged at symmetrically between two on bed die 110; Backform 107 is arranged at the upside of limit mould 108.Limit mould 108 drives mobile by the limit mould oil cylinder 109 being arranged on base 111.The upside of backform 107 is provided with top template 106, and backform 107 is mobile by backform oil cylinder 105 drivings that are arranged on base 111, and backform oil cylinder 105 is connected with top template 106, is positioned at the top of top template 106 for the stripper oil cylinder 104 of the demoulding.
In the present invention's one specific embodiment, bed die 110, limit mould 108 and backform 107 are all connected with cooling system.The cooling medium of cooling system can comprise water, wind, gas.Cooling system comprises the cooling curtain of aqueous vapor annular of the wheel rim position that is positioned at mould; Be positioned at the spoke of described mould and the annular wind cooling tube of wheel rim and spoke thermal center position; Be positioned at the wheel disc of described mould and minute water cone of rising head position.
Source of the gas of the present invention is inert gas, and its density is greater than atmospheric density.Inert gas is rare gas, and rare gas element comprises helium, neon, argon, krypton, xenon, radon.
Low-pressure casting process disclosed by the invention, comprises the steps:
1) front the first Preset Time of die sinking (2S) passes into inert gas to the airtight pressurization plenum chamber of mould, and gas pressure is 0.8-1.0 atmospheric pressure, and inflationtime is the second Preset Time (10S);
2) after die sinking, the 3rd Preset Time passes into inert gas to the airtight pressurization plenum chamber of mould, gas pressure is 0.8-1.0 atmospheric pressure, inflationtime is the 4th Preset Time, guarantee that foundry goods is in the atmosphere of inert gas shielding, isolated air contacts with aluminium liquid, and under uniform temperature and pressure, order of crystallization solidifies;
3) before matched moulds, clean out each mold cavity, connect gas pressurization system and cooling system;
4) on the rising head of bed die, put screen pack, then by casting ladle, carry out quantitative pouring, guarantee that the temperature of casting ladle and cup is 450 500 ° of C;
5) by limit mould oil cylinder, promote each limit mould, when position, by the descending backform of backform oil cylinder, after putting in place, left and right combination up and down again, guarantees to put in place;
6) by pressure setting, control the height that fills type and rising head, make the height of rising head over the height of wheel rim on wheel;
7) cooling end, cutoff high source of the gas, first moves back limit mould, then starts backform and rises with wheel, catches wheel then send to cooling with fitting dish;
8) cleaning wheel overlap, and do wheel mass evaluation, comprise surface quality, pressurization situation, and adjust accordingly the technological parameter of next round operation;
9) whether X-ray examination wheel has the defects such as shrinkage porosite, pore, slag inclusion.
The above explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a low-pressure casting apparatus, is characterized in that, comprising:
The airtight pressurization plenum chamber of mould (103);
Be arranged at the mould in the airtight pressurization plenum chamber of described mould (103);
Inert gas holding vessel (101), described inert gas holding vessel (101) is communicated with by tracheae (102) with the airtight pressurization plenum chamber of described mould (103).
2. low-pressure casting apparatus as claimed in claim 1, is characterized in that, described mould comprises:
Base (111);
Be arranged at the bed die (110) on described base (111);
Limit mould (108), described limit mould (108) is four, and is arranged at symmetrically between two on described bed die (110);
Be arranged at the backform (107) of described limit mould (108) upside.
3. low-pressure casting apparatus as claimed in claim 2, is characterized in that, described limit mould (108) drives mobile by the limit mould oil cylinder (109) being arranged on described base (111).
4. low-pressure casting apparatus as claimed in claim 3, it is characterized in that, the upside of described backform (107) is provided with top template (106), described backform (107) drives mobile by the backform oil cylinder (105) being arranged on described base (111), described backform oil cylinder (105) is connected with described top template (106), is positioned at the top of described top template (106) for the stripper oil cylinder (104) of the demoulding.
5. low-pressure casting apparatus as claimed in claim 4, is characterized in that, described bed die (110), limit mould (108) and described backform (107) are all connected with cooling system.
6. low-pressure casting apparatus as claimed in claim 5, is characterized in that, described cooling system comprises:
Be positioned at the cooling curtain of aqueous vapor annular of the wheel rim position of described mould;
Be positioned at the spoke of described mould and the annular wind cooling tube of wheel rim and spoke thermal center position;
Be positioned at the wheel disc of described mould and minute water cone of rising head position.
7. a low-pressure casting process, is characterized in that, comprises step:
1) front the first Preset Time of die sinking passes into inert gas to the airtight pressurization plenum chamber of mould, and gas pressure is 0.8-1.0 atmospheric pressure, and inflationtime is the second Preset Time;
2) after die sinking, the 3rd Preset Time passes into inert gas to the airtight pressurization plenum chamber of mould, and gas pressure is 0.8-1.0 atmospheric pressure, and inflationtime is the 4th Preset Time;
3), before matched moulds, clean out each mold cavity;
4) on the rising head of bed die, put screen pack, then by casting ladle, carry out quantitative pouring, guarantee that the temperature of casting ladle and cup is 450 500 ° of C;
5) by limit mould oil cylinder, promote each limit mould, when position, by the descending backform of backform oil cylinder, after putting in place, left and right combination up and down again, guarantees to put in place;
6) control the height that fills type and rising head, make the height of rising head over the height of wheel rim on wheel;
7) cooling end, cutoff high source of the gas, first moves back limit mould, then starts backform and rises with wheel, catches wheel then send to cooling with fitting dish;
8) cleaning wheel overlap, and do wheel mass evaluation, comprise surface quality, pressurization situation, and adjust accordingly the technological parameter of next round operation;
9) whether X-ray examination wheel has the defects such as shrinkage porosite, pore, slag inclusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310689231.3A CN103691907A (en) | 2013-12-17 | 2013-12-17 | Low-pressure casting device and low-pressure casting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310689231.3A CN103691907A (en) | 2013-12-17 | 2013-12-17 | Low-pressure casting device and low-pressure casting process |
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| Publication Number | Publication Date |
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| CN103691907A true CN103691907A (en) | 2014-04-02 |
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| CN201310689231.3A Pending CN103691907A (en) | 2013-12-17 | 2013-12-17 | Low-pressure casting device and low-pressure casting process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190899A (en) * | 2014-07-14 | 2014-12-10 | 中信戴卡股份有限公司 | Low-pressure casting mold of melt spinning wheel and process thereof |
| CN104722742A (en) * | 2015-03-26 | 2015-06-24 | 象山同家模具制造有限公司 | Die provided with PLC control lamps and used for low-pressure pouring and method |
| CN105798263A (en) * | 2016-05-01 | 2016-07-27 | 中信戴卡股份有限公司 | Gas exhausting device for low-pressure casting die for aluminum alloy vehicle wheel |
| CN106903290A (en) * | 2017-02-06 | 2017-06-30 | 张建帮 | A kind of casting technique of trailer spindle nose |
| CN110303136A (en) * | 2019-07-11 | 2019-10-08 | 北京航空航天大学青岛研究院 | A kind of casting method improving large-sized aluminium alloy wheel mechanical property |
| CN114951589A (en) * | 2022-05-25 | 2022-08-30 | 贵州师范学院 | Metal material extrusion forming equipment |
| CN116748495A (en) * | 2023-08-11 | 2023-09-15 | 福建长江工业有限公司 | Rotary multi-station aluminum alloy low-pressure casting equipment and metal casting method |
-
2013
- 2013-12-17 CN CN201310689231.3A patent/CN103691907A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190899A (en) * | 2014-07-14 | 2014-12-10 | 中信戴卡股份有限公司 | Low-pressure casting mold of melt spinning wheel and process thereof |
| CN104722742A (en) * | 2015-03-26 | 2015-06-24 | 象山同家模具制造有限公司 | Die provided with PLC control lamps and used for low-pressure pouring and method |
| CN105798263A (en) * | 2016-05-01 | 2016-07-27 | 中信戴卡股份有限公司 | Gas exhausting device for low-pressure casting die for aluminum alloy vehicle wheel |
| CN106903290A (en) * | 2017-02-06 | 2017-06-30 | 张建帮 | A kind of casting technique of trailer spindle nose |
| CN110303136A (en) * | 2019-07-11 | 2019-10-08 | 北京航空航天大学青岛研究院 | A kind of casting method improving large-sized aluminium alloy wheel mechanical property |
| CN114951589A (en) * | 2022-05-25 | 2022-08-30 | 贵州师范学院 | Metal material extrusion forming equipment |
| CN114951589B (en) * | 2022-05-25 | 2023-06-09 | 贵州师范学院 | Metal material extrusion equipment |
| CN116748495A (en) * | 2023-08-11 | 2023-09-15 | 福建长江工业有限公司 | Rotary multi-station aluminum alloy low-pressure casting equipment and metal casting method |
| CN116748495B (en) * | 2023-08-11 | 2023-11-21 | 福建长江工业有限公司 | Metal casting method |
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Application publication date: 20140402 |