CN103658526B - Be beneficial to the vacuum sealed molding inner container of icebox template class aluminium alloy castings technique of cooling - Google Patents

Be beneficial to the vacuum sealed molding inner container of icebox template class aluminium alloy castings technique of cooling Download PDF

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Publication number
CN103658526B
CN103658526B CN201310611248.7A CN201310611248A CN103658526B CN 103658526 B CN103658526 B CN 103658526B CN 201310611248 A CN201310611248 A CN 201310611248A CN 103658526 B CN103658526 B CN 103658526B
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China
Prior art keywords
sand
cooling
vacuum
plastic sheeting
sandbox
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CN201310611248.7A
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Chinese (zh)
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CN103658526A (en
Inventor
马正松
李健
刘红涛
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滁州金诺实业有限公司
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Priority to CN201310611248.7A priority Critical patent/CN103658526B/en
Publication of CN103658526A publication Critical patent/CN103658526A/en
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Abstract

A kind of vacuum sealed molding inner container of icebox template class aluminium alloy castings technique being beneficial to cooling, relate to casting technology field, when utilizing the moulding of V method, when back-up sand, in advance the profile of a large amount of chills along model is placed on plastic sheeting, and then internally back-up sand, chill wants interval to arrange, the space of reserved back-up sand, contributes to vacuumizing.The technique that the cooling advantage of chill is cast in conjunction with V method by the present invention, puts into the sand mold of V method casting by chill, optimize the shortcoming that dry sand cooling is slower, makes foundry goods cooling velocity faster, improves production efficiency, improve the performance of foundry goods.

Description

Be beneficial to the vacuum sealed molding inner container of icebox template class aluminium alloy castings technique of cooling
Technical field
The present invention relates to casting technology field, be specifically related to a kind of vacuum sealed molding (V method) inner container of icebox template class aluminium alloy castings technique being beneficial to cooling.
Background technology
Vacuum sealed molding method also claims v method, be a kind of need not the physics formative method of any bonding agent, mainly in special sandbox, add the dry sand without any bonding agent, after sandbox being sealed with tight plastic sheeting, vacuumize the sand consolidation of the pressure official post adhesive-free inside and outside by casting mold and shaping, then cast obtains the method for foundry goods; Its feature is that surface quality of continuous castings is good, using rate of metal is high, knockout is convenient, dry sand recovery utilization rate is high, be convenient to organization and administration, with short production cycle, favorable environment protection.
The casting of V method and lost foam casting are also known as negative pressure casting, it is different from traditional sand, and to cast maximum advantage be do not use adhesive, complete practical dry moulding, the casting of V method utilizes plastic sheeting to seal sandbox, by air in vacuum-pumping system extraction type, pressure differential is had inside and outside casting mold, make dry sand closely knit, form required die cavity, vacuumize make casting solidification through lower core, mould assembling, cast, remove negative pressure, molding sand is thereupon defeated and dispersed and obtain foundry goods.
In the casting of V method, practicality is dry sand, decreases sand control factor, because there is no other materials in dry sand, so the humidity measurement carried out at ordinary times, and strength test, gas permeability test, and clay is omitted with other carbide composition content measurings.
And during use dry sand, the water content of sand mold is tending towards 0 substantially, stopped moisture evaporation when pouring into a mould, reduction type intracavity gas content, improves the quality of foundry goods.On the other hand, when clearing up product, dry sand is easy to come off from foundry goods, is beneficial to cleaning, reduces the workload of workman.
Relative to dry sand, containing certain moisture in damp sand material, diffusion of vapor in damp sand space and the motion of hydrone serve the effect of heat transfer, and the thermal conductivity factor of water is about 20 times of air, so damp sand has obvious advantage on thermal conductivity factor, then there is certain limitation in dry sand on heat conductivility.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of vacuum sealed molding inner container of icebox template class aluminium alloy castings technique being beneficial to cooling, optimizes the shortcoming that dry sand cooling is slower, and make foundry goods cooling velocity faster, performance is better.
Technical problem to be solved by this invention realizes by the following technical solutions:
Be beneficial to a vacuum sealed molding inner container of icebox template class aluminium alloy castings technique for cooling, comprise following methods step:
1) model is placed on the template of one piece of hollow, model has a large amount of passages, when vacuum action, this some holes contributes to making plastic sheeting be close on model;
2) the plastic sheeting heater thermoplastic that extensibility is large, the rate of plastic deformation is high, by softening plastic film covering on model top layer, by passage, under pull of vacuum, makes plastic sheeting be close to model surface;
3), after stenciling coating is also dried, sandbox is placed on and is covered with on the model of plastic sheeting;
4) when back-up sand, in advance a large amount of chills is placed on plastic sheeting along the profile of model, the leptoprosopy of chill is holded up, and is evenly distributed on model, between the 30 ~ 40mm of interval, reserve the gap vacuumized;
5) charging efficiency is better, granularity is that 100 ~ 200 object dry sands add in sandbox, then carries out micro-shaking, and makes sand consolidation to higher density;
6) open cup, strike off layer of sand surface, cover plastic sheeting, with closed sandbox;
7) sandbox vacuumizes the film by means of covering on sandbox surface, under the effect of atmospheric pressure, casting mold is hardened, and during molding, release negative pressure box vacuum, separates removing template to the absorption affinity of film, then push up case molding, complete a casting mold;
8) before mould assembling, need lower core according to technique, by upper nowel altogether, form the casting mold that has dead head and die cavity, pour into a mould under the state of vacuum;
9) after suitable cool time, cancel vacuum recover atmospheric pressure state, free-pouring sand is flowed out, the chill on cleaning foundry goods, sand can re-use after cooling.
The invention has the beneficial effects as follows: the technique that the cooling advantage of chill is cast in conjunction with V method by the present invention, chill is put into the sand mold of V method casting, optimize the shortcoming that dry sand cooling is slower, make foundry goods cooling velocity faster, improve production efficiency, improve the performance of foundry goods.
Accompanying drawing explanation
Fig. 1 is that the sand mold that the present invention is complete forms signal.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
As shown in Figure 1, a kind of vacuum sealed molding inner container of icebox template class aluminium alloy castings technique being beneficial to cooling, comprises following methods step:
1) model 1 is placed on the template 2 of one piece of hollow, model 1 has a large amount of passages, when vacuum action, this some holes contributes to making plastic sheeting 3 be close on model 1;
2) the plastic sheeting 3 heater thermoplastic that extensibility is large, the rate of plastic deformation is high, covers 3 and covers on model 1 top layer by softening film, by passage, under pull of vacuum, make plastic sheeting 3 be close to model 1 surface;
3), after stenciling coating is also dried, sandbox 4 is placed on and is covered with on the model 1 of plastic sheeting 3;
4) when back-up sand, in advance a large amount of chills 5 is placed on plastic sheeting 3 along the profile of model 1, the leptoprosopy of chill 5 is holded up, and is evenly distributed on model 1, between the 30 ~ 40mm of interval, reserve the gap vacuumized;
5) charging efficiency is better, granularity is that 100 ~ 200 object dry sands 6 add in sandbox 4, then carries out micro-shaking, and makes sand consolidation to higher density;
6) open cup, strike off layer of sand surface, cover plastic sheeting 3, with closed sandbox 4;
7) sandbox 4 vacuumizes the film by means of covering on sandbox 4 surface, under the effect of atmospheric pressure, casting mold is hardened, and during molding, release negative pressure box vacuum, separates removing template to the absorption affinity of film, then push up case molding, complete a casting mold;
8) before mould assembling, need lower core according to technique, by upper nowel altogether, form the casting mold that has dead head and die cavity, pour into a mould under the state of vacuum;
9) after suitable cool time, cancel vacuum recover atmospheric pressure state, free-pouring sand is flowed out, the chill on cleaning foundry goods, sand can re-use after cooling.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (1)

1. be beneficial to a vacuum sealed molding inner container of icebox template class aluminium alloy castings technique for cooling, it is characterized in that, comprise following methods step:
1) model is placed on the template of one piece of hollow, model has a large amount of passages, when vacuum action, this some holes contributes to making plastic sheeting be close on model;
2) the plastic sheeting heater thermoplastic that extensibility is large, the rate of plastic deformation is high, by softening plastic film covering on model top layer, by passage, under pull of vacuum, makes plastic sheeting be close to model surface;
3), after stenciling coating is also dried, sandbox is placed on and is covered with on the model of plastic sheeting;
4) when back-up sand, in advance chill is placed on plastic sheeting along the profile of model, the leptoprosopy of chill is holded up, and is evenly distributed on model, between the 30 ~ 40mm of interval, reserve the gap vacuumized;
5) charging efficiency is good, granularity is that 100 ~ 200 object dry sands add in sandbox, then carries out micro-shaking, makes sand consolidation;
6) open cup, strike off layer of sand surface, cover plastic sheeting, with closed sandbox;
7) sandbox vacuumizes the film by means of covering on sandbox surface, under the effect of atmospheric pressure, casting mold is hardened, and during molding, release negative pressure box vacuum, separates removing template to the absorption affinity of film, then push up case molding, complete a casting mold;
8) before mould assembling, need lower core according to technique, by upper nowel altogether, form the casting mold that has dead head and die cavity, pour into a mould under the state of vacuum;
9) after suitable cool time, cancel vacuum recover atmospheric pressure state, free-pouring sand is flowed out, the chill on cleaning foundry goods, sand re-uses after cooling.
CN201310611248.7A 2013-11-26 2013-11-26 Be beneficial to the vacuum sealed molding inner container of icebox template class aluminium alloy castings technique of cooling CN103658526B (en)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104399882B (en) * 2014-11-07 2016-06-29 滁州金诺实业有限公司 V method casting technique is adopted to produce the secondary formative method of casing class aluminium alloy castings
CN104525857B (en) * 2014-12-15 2016-07-13 滁州金诺实业有限公司 Inner container of icebox mould box structure is cast based on V method
CN104525855B (en) * 2014-12-15 2016-09-07 滁州金诺实业有限公司 Metal mold technique based on V method casting inner container of icebox mould strand
CN104525856B (en) * 2014-12-15 2016-07-06 滁州金诺实业有限公司 Inner container of icebox mould top box formative technology is cast based on V method
CN106180559A (en) * 2016-08-01 2016-12-07 滁州沃博自动化科技有限公司 A kind of air compressor machine exhaustor vacuum forming method
CN106180569A (en) * 2016-09-07 2016-12-07 滁州市鑫鼎机械模具制造有限公司 A kind of casting inner container of icebox mould top box formative technology

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CN101693282A (en) * 2009-10-22 2010-04-14 南阳市汇森精密仪器铸造有限公司 Method for producing voltage-bearing aluminum alloy tank body of ultra-high voltage switch by V-process
CN102235365A (en) * 2011-05-06 2011-11-09 梁汉民 Wear-resisting sand pump and casting method thereof
CN102941333A (en) * 2012-10-12 2013-02-27 南阳市汇森精密仪器铸造有限公司 Method for producing ultrahigh pressure switch pressure-bearing aluminum alloy tanks under low pressure through V method

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Publication number Priority date Publication date Assignee Title
JPH0818104B2 (en) * 1992-06-08 1996-02-28 株式会社栗本鐵工所 Hollow sphere casting method
JP5124163B2 (en) * 2007-04-19 2013-01-23 独立行政法人国立高等専門学校機構 Casting equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101693282A (en) * 2009-10-22 2010-04-14 南阳市汇森精密仪器铸造有限公司 Method for producing voltage-bearing aluminum alloy tank body of ultra-high voltage switch by V-process
CN102235365A (en) * 2011-05-06 2011-11-09 梁汉民 Wear-resisting sand pump and casting method thereof
CN102941333A (en) * 2012-10-12 2013-02-27 南阳市汇森精密仪器铸造有限公司 Method for producing ultrahigh pressure switch pressure-bearing aluminum alloy tanks under low pressure through V method

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