CN102284679A - Method for casting engine cylinder cover by using lost foam - Google Patents

Method for casting engine cylinder cover by using lost foam Download PDF

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Publication number
CN102284679A
CN102284679A CN2011102786763A CN201110278676A CN102284679A CN 102284679 A CN102284679 A CN 102284679A CN 2011102786763 A CN2011102786763 A CN 2011102786763A CN 201110278676 A CN201110278676 A CN 201110278676A CN 102284679 A CN102284679 A CN 102284679A
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CN
China
Prior art keywords
casting
mould
lost foam
matrix
vacuum
Prior art date
Application number
CN2011102786763A
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Chinese (zh)
Inventor
马正松
张玉胜
刘超
Original Assignee
滁州金诺实业有限公司
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 滁州金诺实业有限公司 filed Critical 滁州金诺实业有限公司
Priority to CN2011102786763A priority Critical patent/CN102284679A/en
Publication of CN102284679A publication Critical patent/CN102284679A/en

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Abstract

The invention provides a method for casting an engine cylinder cover by using lost foam, relating to the technical field of casting. The technological process provided by the invention comprises the following steps of: firstly, utilizing three-dimensional software to design a model for manufacturing a lost foam matrix and manufacturing a corresponding mould; injecting expandable molding beads into the mould; then heating and cooling to produce each matrix; then drying and bonding dried each matrix into a whole body according to the requirements; bonding the whole body on a casting system to obtain a lost foam model; immersing special coating on the surface of the lost foam model and then drying; putting the treated lost foam model into a three-dimensional shaking sand case; after injecting dry sand, covering a layer of thin film on the surface; injecting smelted solution into the casting system of the lost foam model and melting the lost foam model to replace the space by the solution; after the solution is cooled and condensed, opening the case and taking out castings. The method provided by the invention improves production efficiency, reduces labor force, and reduces labor cost and production cost.

Description

Method with the lost foam casting engine cylinder cover
Technical field
The present invention relates to casting technology field, be specifically related to a kind of method with the lost foam casting engine cylinder cover.
Background technology
Cylinder cap is a big vitals of engine, more owing to the air flue in the cylinder cap plays an important role to whole engine, because air flue is complex-shaped and the specification requirement height, and the air flue shape is not processed yet, this just requires to cast the accuracy that reaches very high, the casting of cylinder cap now mostly is sand casting, and its step is roughly: 1. require to produce master mold according to product drawing and casting, comprise the mould of making the air flue core; 2. produce the core of air intake duct and gas off-take according to modeling requirement, 3. master mold is placed sandbox, inject clay-bonded sand and consolidation; 4. after molding, repairing type, the air flue core is put into the clay sand mold on request, 5. after drying, the mould assembling, the solution that casting is handled well in die cavity, 6. treat the solution cooling after, take out the cylinder cap that foundry goods and cleaning promptly obtain sand casting.The cylinder cap that casting is in this way come out, following shortcoming is arranged, 1. the air flue of cylinder cap must adopt core, and core can produce accumulated error and skew when putting into sand mold, causes the cylinder cap quality to descend, even scrap, this just requires workman's technology height, and operation easier is big, and causing wastes time and energy and waste material.2. in order to prevent casting deformation, adopt and strengthen the method for reserving processing capacity, cause foundry goods to lay particular stress on.3. adopt and manually repair type and operation, make surface quality of continuous castings poor.4. this casting, foundry goods easily produces defectives such as burning into sand, pore and tissue looseness.5. in the cleaning work in later stage, labor strength is big, and environmental pollution is serious.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of green, economic, feasible more method with the lost foam casting engine cylinder cover.
Technical problem to be solved by this invention realizes by the following technical solutions,
A kind of method with the lost foam casting engine cylinder cover is characterized in that: described process is,
1.. according to product drawing with casting requires and self characteristics of product, design the model that is used to make disappearance mould matrix with three-dimensional software, and produce corresponding mould;
2.. in the mould that 1. step is made, inject the expandability foam beads, after heating, cooling, produce each matrix, and to send into temperature be to carry out drying processing in 40 ℃~50 ℃ the drying room;
3.. 2. middle dry each the good matrix of step is bonded as a cylinder cap matrix integral body on request, and bonding top casting system, just obtained disappearance mould model;
4.. at disappearance mould model surface dip-coating special coating, make thickness of coating layer reach 0.4~0.6mm, send into temperature then and be and carry out drying in 50 ℃~60 ℃ the drying room and handle;
5.. the 4. middle dry good disappearance mould model of step is placed in the three-dimensional vibrations sandbox, inject dry sand several times to certain altitude, and dry sand is shaken to the regulation degree of packing,, make sandbox form closed at the surface coverage thin film;
6.. connect vacuum by the vacuum system interface, be provided with the dry sand screen pack, make dry sand can not taken away by vacuum system at the vacuum system interface; When negative pressure in the sandbox is the 0.035Mpa left and right sides, in the running gate system of disappearance mould model, inject the solution that melting is handled well, and pressurize a period of time, disappearance mould model is melted, the space is replaced by solution, and the small amount of matter that disappearance mould model produces is sucked in the dry sand by vacuum;
7.. after treating the solution cooled and solidified, unpack and take out foundry goods, after cleaning, promptly obtained the engine cylinder cover foundry goods of casting with lost-foam casting method.
The invention has the beneficial effects as follows:
1,, can make die size precisely stable, advantage such as the reservation allowance of foundry goods is little, and wall thickness is even, and casting weight is light because of utilizing three-dimensional software to carry out moulding and analysis.
2, make the engine cylinder cover foundry goods with lost foam casting process, adopt the dried sand negative-pressure moulding, replaced in the sand casting process pre-buriedly, play type, repair type, oven dry, complicated step such as mould assembling, simplified the technological process of production, easy and simple to handle, reduced moulding working strength of workers and technical difficulty; When foundry goods took out, molding sand came off, and almost exempted from sand removal, treat that foundry goods is cooled to normal temperature after, special coating comes off automatically, has reduced the cast cleaning workload more than 95%, thereby has reduced labour intensity, improve production efficiency, reduced the labour, reduced recruitment cost and manufacturing cost.
3, adopt the dried sand negative-pressure moulding, because of moisture in the dry sand is extremely low, need not the baking type and foundry goods can not produce defectives such as burning into sand, pore and tissue looseness, improved the quality and the yield rate of foundry goods; Molding sand can be repeatedly used, and can reduce molding sand consumption 95%~98%, thereby has reduced raw-material consumption, has reduced production cost.
4, owing to disappearance mould matrix is that the mould manufacturing gets, surface smoothness is good, and is the integral cast of bonding back, makes the surface quality of continuous castings height.
5, producing engine cylinder cover with lost foam casting process, not only can save energy and reduce the cost and reduce labour intensity, also improved the environment of plant, is not only " green " engineering of economy but also environmental protection.
Description of drawings
Fig. 1 is an engine cylinder cover schematic diagram of the present invention;
Fig. 2 is the present invention's mould matrix bonding schematic diagram that disappears;
Fig. 3 is moulding casting schematic diagram of the present invention.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Embodiment 1
As Fig. 1, Fig. 2, shown in Figure 3, a kind of method with the lost foam casting engine cylinder cover, process be,
1.. according to product drawing with casting requires and self characteristics of product, design the model that is used to make disappearance mould matrix with three-dimensional software, and produce corresponding mould;
2.. in the mould that 1. step is made, inject the expandability foam beads, after heating, cooling, produce each matrix, and to send into temperature be to carry out drying processing in 40 ℃~50 ℃ the drying room;
3.. 2. middle dry each the good matrix of step is bonded as cylinder cap matrix 1 integral body on request, and bonding top casting system 2, just obtained disappearance mould model 4;
4.. at disappearance mould model 4 surperficial dip-coating special coatings, make thickness of coating layer reach 0.4~0.6mm, send into temperature then and be and carry out drying in 50 ℃~60 ℃ the drying room and handle;
5.. the 4. middle dry good disappearance mould model 4 of step is placed in the three-dimensional vibrations sandbox 3, inject dry sand several times to certain altitude, and dry sand 5 is shaken to the regulation degree of packing,, make sandbox 3 form closeds at surface coverage thin film 8;
6.. connect vacuum by vacuum system interface 6,6 places are provided with dry sand screen pack 7 at the vacuum system interface, make dry sand 5 can not taken away by vacuum system; When negative pressure in the sandbox is the 0.035Mpa left and right sides, in the running gate system 2 of disappearance mould model 4, inject the solution that melting is handled well, and pressurize a period of time, disappearance mould model 4 is melted, the space is replaced by solution, and the small amount of matter that disappearance mould model 4 produces is sucked in the dry sand by vacuum;
7.. after treating the solution cooled and solidified, unpack and take out foundry goods, after cleaning, promptly obtained the engine cylinder cover foundry goods of casting with lost-foam casting method.
More than show and described basic 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; that describes in the foregoing description and the specification 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.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims (1)

1. with the method for lost foam casting engine cylinder cover, it is characterized in that: described process is,
1.. according to product drawing with casting requires and self characteristics of product, design the model that is used to make disappearance mould matrix with three-dimensional software, and produce corresponding mould;
2.. in the mould that 1. step is made, inject the expandability foam beads, after heating, cooling, produce each matrix, and to send into temperature be to carry out drying processing in 40 ℃~50 ℃ the drying room;
3.. 2. middle dry each the good matrix of step is bonded as a cylinder cap matrix integral body on request, and bonding top casting system, just obtained disappearance mould model;
4.. at disappearance mould model surface dip-coating special coating, make thickness of coating layer reach 0.4~0.6mm, send into temperature then and be and carry out drying in 50 ℃~60 ℃ the drying room and handle;
5.. the 4. middle dry good disappearance mould model of step is placed in the three-dimensional vibrations sandbox, inject dry sand several times to certain altitude, and dry sand is shaken to the regulation degree of packing,, make sandbox form closed at the surface coverage thin film;
6.. connect vacuum by the vacuum system interface, be provided with the dry sand screen pack, make dry sand can not taken away by vacuum system at the vacuum system interface; When negative pressure in the sandbox is the 0.035Mpa left and right sides, in the running gate system of disappearance mould model, inject the solution that melting is handled well, and pressurize a period of time, disappearance mould model is melted, the space is replaced by solution, and the small amount of matter that disappearance mould model produces is sucked in the dry sand by vacuum;
7.. after treating the solution cooled and solidified, unpack and take out foundry goods, after cleaning, promptly obtained the engine cylinder cover foundry goods of casting with lost-foam casting method.
CN2011102786763A 2011-09-19 2011-09-19 Method for casting engine cylinder cover by using lost foam CN102284679A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102641991A (en) * 2012-05-21 2012-08-22 南充市高坪区铸钢厂 Production method of colliding head shell of tramcar buffer and product
CN102672099A (en) * 2012-05-21 2012-09-19 南充同俊机械制造有限公司 Production method of mine car turning rolling ring and product
CN102817946A (en) * 2012-08-10 2012-12-12 四川南充凯来机械制造有限公司 Acting cylinder casing structure
CN103203427A (en) * 2012-07-16 2013-07-17 贵州英吉尔机械制造有限公司 Molding and casting method for automobile cylinder cover with high air-tightness
CN103394643A (en) * 2013-07-19 2013-11-20 宁波吉威熔模铸造有限公司 Casting method of automobile engine hood
CN103658532A (en) * 2013-12-03 2014-03-26 遵义市润丰源钢铁铸造有限公司 Method for making plastic foam die by using foamed plastic sheet in casting process
CN104209463A (en) * 2014-09-01 2014-12-17 山西模范机械制造有限公司 Production material and process for internal combustion engine cylinder body and cylinder cover with light weight and high thermal fatigue strength
CN105081219A (en) * 2015-08-31 2015-11-25 共享装备股份有限公司 Reverse rising type evaporative pattern casting system
CN105215287A (en) * 2015-11-05 2016-01-06 埃维柯精密铸造(安徽)有限公司 A kind of valve body evaporative pattern and using method thereof
CN105215277A (en) * 2015-11-05 2016-01-06 埃维柯精密铸造(安徽)有限公司 A kind of valve gap bolt hole evaporative pattern and straight forming technique thereof
CN105964918A (en) * 2016-06-28 2016-09-28 湖北星源科技有限公司 Evanescent mode casting technology method for lightweight balance shaft beam
CN106363130A (en) * 2016-09-07 2017-02-01 滁州市鑫鼎机械模具制造有限公司 Method of adopting evanescent mode casting technology to manufacture casting blank of refrigerator liner die

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CN1843657A (en) * 2006-04-25 2006-10-11 安徽天钰机械股份有限公司 Lost-foam casting process for cylinder body and cylinder cap of diesel engine and gasoline engine
CN101698218A (en) * 2009-11-09 2010-04-28 山西天海泵业有限公司 Lost-foam casting method for water pump thin-wall part
CN101767186A (en) * 2010-01-05 2010-07-07 河北冀凯铸业有限公司 Method for preventing crush of lost foam casting product
CN101829760A (en) * 2010-04-21 2010-09-15 福清龙泰机械有限公司 Lost foam casting method of double-layer exhaust pipe for engine
CN101898228A (en) * 2010-07-31 2010-12-01 刘玉满 Method for casting sound casting by using lost foam coated with high-performance coating in vibration way

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CN1843657A (en) * 2006-04-25 2006-10-11 安徽天钰机械股份有限公司 Lost-foam casting process for cylinder body and cylinder cap of diesel engine and gasoline engine
CN101698218A (en) * 2009-11-09 2010-04-28 山西天海泵业有限公司 Lost-foam casting method for water pump thin-wall part
CN101767186A (en) * 2010-01-05 2010-07-07 河北冀凯铸业有限公司 Method for preventing crush of lost foam casting product
CN101829760A (en) * 2010-04-21 2010-09-15 福清龙泰机械有限公司 Lost foam casting method of double-layer exhaust pipe for engine
CN101898228A (en) * 2010-07-31 2010-12-01 刘玉满 Method for casting sound casting by using lost foam coated with high-performance coating in vibration way

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102641991A (en) * 2012-05-21 2012-08-22 南充市高坪区铸钢厂 Production method of colliding head shell of tramcar buffer and product
CN102672099A (en) * 2012-05-21 2012-09-19 南充同俊机械制造有限公司 Production method of mine car turning rolling ring and product
CN103203427A (en) * 2012-07-16 2013-07-17 贵州英吉尔机械制造有限公司 Molding and casting method for automobile cylinder cover with high air-tightness
CN102817946A (en) * 2012-08-10 2012-12-12 四川南充凯来机械制造有限公司 Acting cylinder casing structure
CN103394643A (en) * 2013-07-19 2013-11-20 宁波吉威熔模铸造有限公司 Casting method of automobile engine hood
CN103658532A (en) * 2013-12-03 2014-03-26 遵义市润丰源钢铁铸造有限公司 Method for making plastic foam die by using foamed plastic sheet in casting process
CN104209463A (en) * 2014-09-01 2014-12-17 山西模范机械制造有限公司 Production material and process for internal combustion engine cylinder body and cylinder cover with light weight and high thermal fatigue strength
CN105081219A (en) * 2015-08-31 2015-11-25 共享装备股份有限公司 Reverse rising type evaporative pattern casting system
CN105215287A (en) * 2015-11-05 2016-01-06 埃维柯精密铸造(安徽)有限公司 A kind of valve body evaporative pattern and using method thereof
CN105215277A (en) * 2015-11-05 2016-01-06 埃维柯精密铸造(安徽)有限公司 A kind of valve gap bolt hole evaporative pattern and straight forming technique thereof
CN105964918A (en) * 2016-06-28 2016-09-28 湖北星源科技有限公司 Evanescent mode casting technology method for lightweight balance shaft beam
CN106363130A (en) * 2016-09-07 2017-02-01 滁州市鑫鼎机械模具制造有限公司 Method of adopting evanescent mode casting technology to manufacture casting blank of refrigerator liner die

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