CN1843657A - Lost-foam casting process for cylinder body and cylinder cap of diesel engine and gasoline engine - Google Patents
Lost-foam casting process for cylinder body and cylinder cap of diesel engine and gasoline engine Download PDFInfo
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- CN1843657A CN1843657A CN 200610039860 CN200610039860A CN1843657A CN 1843657 A CN1843657 A CN 1843657A CN 200610039860 CN200610039860 CN 200610039860 CN 200610039860 A CN200610039860 A CN 200610039860A CN 1843657 A CN1843657 A CN 1843657A
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Abstract
The invention discloses a method for casting disappear mould of the cover of diesel engine and petrol engine that based on disappear mould technique, which can solve the problems of present sand casting technique with high material consumption, heavy cast, and environment pollution, etc. The invention slices matter into several mould plates to prepare the mould; than filling the material of disappear mould into mould to attain the mould plate of disappear mould which is the same with said matter; dipping disappear mould dope on the mould plate and arranging it into sand tank to be vibrated and poured to melt mould plate into carbon monoxide and carbon dioxide to be discharged to attain the cast of said matter. The invention has the advantages that save raw material, reduce labor intensity and improve property.
Description
Technical field
The present invention relates to a kind of casting technique, the casting of metals technology of especially a kind of diesel engine, cylinder of petrol engine cylinder cap, a kind of specifically diesel engine, cylinder of petrol engine cylinder cap lost foam casting process.
Background technology
As everyone knows, sand casting technology commonly used has hot box, cold-box, gravitational casting, low pressure casting etc., and these casting method ubiquities a series of problems such as labour intensity is big, raw materials consumption is many, casting weight is laid particular stress on, environmental pollution serious, degree is relatively poor, the mach workload of need is big.
Two big key components of diesel engine, cylinder of petrol engine cylinder cap motor vehicle, generally adopting casting to add mach mode at present produces, because its inner passage complexity, therefore by existing casting method must by after carrying out machined in the cast(ing) surface perforate again the method for shutoff make, its inner passage corner is 90 degree, and resistance is bigger, has a strong impact on the complete machine performance, therefore existing engine for automobile seldom adopts sand casting, and to having done strict restriction its service life.
Summary of the invention
The objective of the invention is that the labour intensity that exists at existing diesel engine, cylinder of petrol engine cylinder cap molding sand casting method is big, raw materials consumption is many, casting weight is laid particular stress on, environmental pollution serious, degree is relatively poor, need the big problem of mach workload, invents a kind of diesel engine based on disappearance mould technology, cylinder of petrol engine cylinder cap lost foam casting process newly.
Technical scheme of the present invention is:
A kind of diesel engine, cylinder of petrol engine cylinder cap lost foam casting process is characterized in that it may further comprise the steps:
A, the diesel engine that will treat cast form, cylinder of petrol engine or cylinder cap cut into some splicing blocks or sheet, and produce and described splicing block or the identical mold cavity of sheet; The splicing block after each diesel engine, cylinder of petrol engine or cylinder cap are cut or the quantity of sheet and direction can be cut from the angle that helps most pouring into a mould and splice;
B, send out the molding bead that expansion 40-50 doubly obtains containing residual pentane with the mixed material of expandable polystyrene and polymethyl methacrylate is pre-in airtight container, place closed container to store this molding bead and standby after dry 8-10 hour;
C, above-mentioned molding bead is injected aforesaid mold cavity under 4-8 atmospheric pressure;
D, behind above-mentioned injection end-of-job, mould is heated to 130-150 ℃ together with the molding bead in the mold cavity, so that the molding bead in the mold cavity further expands and the mutual extrusion fusion obtains disappearance mould module or matrix identical with the mold cavity shape, that be equal to aforementioned splicing block or sheet under the effect of residual pentane;
E, above-mentioned disappearance mould module or matrix deviate from from mold cavity and dry;
F, the disappearance mould module of the dry gained of the demoulding or matrix are spliced by the shape of diesel engine, cylinder of petrol engine or the cylinder cap of final shaping and compose model cluster and on the model cluster that composes, install running gate system;
G, with lost foam paint in all surfaces externally and internally dip-coatings except that the sprue gate of casting of metals pipeline and model cluster connecting place of above-mentioned model cluster and under 45-55 ℃ temperature oven dry obtain pour mass;
H, above-mentioned pour mass placed in the airtight sandbox through shake sand make the pour mass die cavity be full of molding sand and integral body places molding sand, airtight sandbox is taken out negative pressure, when negative pressure reaches-pours into a mould during 0.8-0.4bar, make the model cluster fusing, burning produces carbon monoxide, carbon dioxide, water and other hydrocarbon gas, because the high temperature of lost foam paint ability molten steel or molten iron, go into injection model bunch and model cluster is fused at molten steel or iron and molten steel or molten iron typing can be able to not infiltrated in molding sand in the molding sand after gas is discharged, promptly obtain required diesel engine after molten steel or the molten iron cooling, cylinder of petrol engine or cylinder head casting.
The above-mentioned demoulding can be by deviating from disappearance mould module or matrix after mold cavity carries out water cooling from mold cavity.
Letter side it, lost foam casting of the present invention (claiming cavityless casting again) is that the bubbles model bonding similar to the casting dimension shape is combined into model cluster, after brushing fireproof coating and oven dry, be embedded in vibration molding in the dried quartz sand, under negative pressure, pour into a mould, make the model gasification, liquid metals occupies modal position, solidifies the novel casting method that the cooling back forms foundry goods.
Beneficial effect of the present invention:
1, at first working strength of workers has reduced, and this mainly is because lost foam casting process need not moulding and coremaking, can finish the pattern making procedure of cavityless casting after only needing to stand in foaming in the mould and glue together cluster with the water vapour of cleaning and clean foam beads; Next has reduced raw-material consumption, because what lost foam casting process was used is single dry sand, so need not to consume coal dust, potter's clay, bentonite, dextrin, closes raw and auxiliary materials such as fatty oil, tung oil, and the rate of recovery of the single dry sand of dispellable mould casting is up to more than 95%; Be the weight saving of foundry goods at last, because the dimensional accuracy height of disappearance die casting, its machine-finish allowance is just very little, usually less than 3 millimeters, on the other hand because matrix Forming Quality height, inside die cavity and hole that common sand technology can't be made, all available disappearance mold technique is finished, and this just from having alleviated the weight of foundry goods to a great extent, had both improved the quality of cast properties, save the foundry goods raw material again, reduced or saved the machining operation, thereby reduced production cost.
With the 4102Q cylinder cover for diesel engine is example, every disappearance mould cylinder head is compared with the sand mold cylinder head and is alleviated 6kg, by producing 30000 calculating per year, one of single raw material molten iron has just been saved: 30000 * 6=180000kg=180 ton, the molten iron market price is 4000 yuan/ton, and it is appreciable promptly having saved ten thousand yuan of visible economic benefits of 180 * 4000=720.
2, the free degree of modelling increases.
3, exempted the core that uses in the castings production.
4, a lot of foundry goods can not wanted riser feeding.
5, improve the foundry goods precision.Can obtain the shape and structure complexity, but duplication of production high accuracy foundry goods, can make the casting section thickness Deviation Control-0.15～+ 0.15mm between.
6, do not produce overlap on the model composition surface.
7, has the advantage that alleviates casting weight about 1/5.
8, reduce allowance.Can reduce machining allowance, to some part even can not process.This has just significantly reduced machined and machine tool investment (for example, can reduce half investment for different situations).
9, compare with traditional cavity casting, the mould investment descends.
10, traditional knockout and knockout operation have been eliminated fully.
But 11 integral production intricate castings because the glue-bondable composition block mold of model of piecemeal of the present invention or sheet is cast complicated global facility, contrast original a plurality of foundry goods combination build-up member (as the diesel oil preheating device), can benefit 1 to 10 times.
12, can reduce plant personnel, reduce labor cost.
13, casting technique is flexible, and the flexibility of casting technique is extremely important, places a large amount of similar or different foundry goods because technology of the present invention might produce in sandbox to change simultaneously, and running gate system also so very flexible.In a word, we can say that every kind of advantage is all consistent with economic interests, has also improved condition of work simultaneously.
14, process stabilizing, the product percent defective is low.
15, good environmental protection, the polystyrene of the primary raw material of disappearance mould of the present invention and PMMA produce only carbon monoxide, carbon dioxide, water and other hydrocarbon gas when burning, and its content all is lower than the standard that Europe allows.Outside drawing, dry sand can use natural silica Sand, and 100% recycles repeatedly, does not contain binding agent.The coating that model uses is made up of auxiliary materials such as water interpolation binding agents, can not produce pollution.
16, further improve end properties, and body in water channel, air flue or oil leab can realize rounding off, not only improve performance, and can save fuel oil.
17, can be used for the hot investment casting of automobile engine, utilize the ironcasting engine to replace aluminium alloy engine, thereby prolong the service life of automobile and prolong retirement life, reduce cost.
Description of drawings
Fig. 1 is cylinder cap of the present invention and branch tangent plane structural representation.
The specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 1.
A kind of diesel engine, cylinder of petrol engine cylinder cap lost foam casting process, it may further comprise the steps:
A, the diesel engine that will treat cast form, cylinder of petrol engine or cylinder cap cut into some splicing blocks or sheet, cylinder cap can be cut into four chip architectures of showing as Fig. 1 (the branch tangent plane is represented in double dot dash line among the figure) during concrete enforcement, and for cylinder body, can cut into eight or eight, the splicing block after each diesel engine, cylinder of petrol engine or cylinder cap are cut or the quantity of sheet and direction can be cut from the angle that helps most pouring into a mould and splice; Shape and internal structure according to minute section or piece produces respectively and described splicing block or the identical mold cavity of sheet then;
B, the pre-expansion 40-50 of sending out doubly obtains containing the molding bead of residual pentane in airtight container with the mixed material of expandable polystyrene and polymethyl methacrylate (the STMNAS-3 number material that can adopt Hangzhou Kester chemical industry Co., Ltd to produce), places closed container to store this molding bead and standby after dry 8-10 hour;
C, above-mentioned molding bead is injected aforesaid each mold cavity under 4-8 atmospheric pressure;
D, behind above-mentioned injection end-of-job, each mould is steam heated to 130-150 ℃ together with the molding bead water in the mold cavity, so that the molding bead in each mold cavity further expands and the mutual extrusion fusion obtains disappearance mould module or matrix identical with the mold cavity shape, that be equal to aforementioned splicing block or sheet under the effect of residual pentane;
E, water will be wherein after with each mold cools down disappearance mould module or matrix is deviate from from each mold cavity and dry;
F, respectively disappear mould module or the matrix of the dry gained of the demoulding spliced by the shape of diesel engine, cylinder of petrol engine or the cylinder cap of final shaping and compose model cluster and on the model cluster that composes, install running gate system;
G, with lost foam paint in all surfaces externally and internally dip-coatings except that the sprue gate of casting of metals pipeline and model cluster connecting place of above-mentioned model cluster and under 45-55 ℃ temperature oven dry obtain pour mass; To manually can adopt manipulator to operate herein;
H, above-mentioned pour mass placed in the airtight sandbox through shake sand make the pour mass die cavity be full of molding sand and integral body places molding sand, airtight sandbox is taken out negative pressure, when negative pressure reaches-pours into a mould during 0.8-0.4bar, make the model cluster fusing, burning produces carbon monoxide, styrene, water and other hydrocarbon gas, because the high temperature of lost foam paint ability molten steel or molten iron, go into injection model bunch and model cluster is fused at molten steel or iron and molten steel or molten iron typing can be able to not infiltrated in molding sand in the molding sand after gas is discharged, promptly obtain required diesel engine after molten steel or the molten iron cooling, cylinder of petrol engine or cylinder head casting.
In addition, the described running gate system of present embodiment is same as the prior art.
Claims (2)
1, a kind of diesel engine, cylinder of petrol engine cylinder cap lost foam casting process is characterized in that it may further comprise the steps:
A, the diesel engine that will treat cast form, cylinder of petrol engine or cylinder cap cut into some splicing blocks or sheet, and produce and described splicing block or the identical mold cavity of sheet;
B, send out the molding bead that expansion 40-50 doubly obtains containing residual pentane with the mixed material of expandable polystyrene and polymethyl methacrylate is pre-in airtight container, place closed container to store this molding bead and standby after dry 8-10 hour;
C, above-mentioned molding bead is injected aforesaid mold cavity under 4-8 atmospheric pressure;
D, behind above-mentioned injection end-of-job, mould is heated to 130-150 ℃ together with the molding bead in the mold cavity, so that the molding bead in the mold cavity further expands and the mutual extrusion fusion obtains disappearance mould module or matrix identical with the mold cavity shape, that be equal to aforementioned splicing block or sheet under the effect of residual pentane;
E, above-mentioned disappearance mould module or matrix deviate from from mold cavity and dry;
F, the disappearance mould module of the dry gained of the demoulding or matrix are spliced by the shape of diesel engine, cylinder of petrol engine or the cylinder cap of final shaping and compose model cluster and on the model cluster that composes, install running gate system;
G, with lost foam paint in all surfaces externally and internally dip-coatings except that the sprue gate of casting of metals pipeline and model cluster connecting place of above-mentioned model cluster and under 45-55 ℃ temperature oven dry obtain pour mass;
H, above-mentioned pour mass placed in the airtight sandbox through shake sand make the pour mass die cavity be full of molding sand and integral body places molding sand, airtight sandbox is taken out negative pressure, when negative pressure reaches-pours into a mould during 0.8--0.4bar, make the model cluster fusing, promptly obtain required diesel engine, cylinder of petrol engine or cylinder head casting after the cooling.
2, diesel engine according to claim 1, cylinder of petrol engine cylinder cap lost foam casting process is characterized in that by after mold cavity carries out water cooling disappearance mould module or matrix being deviate from from mold cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200610039860 CN1843657A (en) | 2006-04-25 | 2006-04-25 | Lost-foam casting process for cylinder body and cylinder cap of diesel engine and gasoline engine |
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| CN 200610039860 CN1843657A (en) | 2006-04-25 | 2006-04-25 | Lost-foam casting process for cylinder body and cylinder cap of diesel engine and gasoline engine |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972844A (en) * | 2010-10-28 | 2011-02-16 | 黄元吉 | Production process for applying expendable pattern casting technology to vermicular-iron diesel engine |
| CN102198488A (en) * | 2011-04-19 | 2011-09-28 | 滁州金诺实业有限公司 | Method for manufacturing casting blank of refrigerator inner container die by using lost foam casting process |
| CN102284679A (en) * | 2011-09-19 | 2011-12-21 | 滁州金诺实业有限公司 | Method for casting engine cylinder cover by using lost foam |
| CN102310163A (en) * | 2011-09-19 | 2012-01-11 | 滁州金诺实业有限公司 | Lost foam casting method of engine gear chamber |
| CN102310162A (en) * | 2011-09-19 | 2012-01-11 | 滁州金诺实业有限公司 | Novel technology for casting engine cylinder body by lost foam |
| CN102319659A (en) * | 2011-08-19 | 2012-01-18 | 东风汽车股份有限公司 | Cylinder body main body core dip-coating process |
| CN102744365A (en) * | 2012-06-21 | 2012-10-24 | 常州市常协柴油机机体有限公司 | Lost foam casting method of cylinder of single cylinder diesel engine |
| CN103008562A (en) * | 2012-11-27 | 2013-04-03 | 天长缸盖有限公司 | Vertical casting device for integral cylinder head casting |
| CN103212668A (en) * | 2012-01-18 | 2013-07-24 | 浙江派尼尔机电有限公司 | Method for manufacturing outboard engine cylinder |
| CN103372630A (en) * | 2012-04-25 | 2013-10-30 | 河北瑞丰动力缸体有限公司 | Evanescent mode production process of engine cylinder body |
| CN103480816A (en) * | 2012-06-12 | 2014-01-01 | 安庆中船柴油机有限公司 | Casting process for cylinder cover of marine air cylinder |
| CN103801654A (en) * | 2012-11-06 | 2014-05-21 | 北汽福田汽车股份有限公司 | Method used for manufacturing die foam full model |
| CN104028695A (en) * | 2014-05-12 | 2014-09-10 | 浙江机电职业技术学院 | Cavity-pasting full-mold casting method |
| 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 |
| CN104368762A (en) * | 2014-09-22 | 2015-02-25 | 广西玉柴机器股份有限公司 | Aluminum alloy diesel engine cylinder cover casting method |
| CN104826989A (en) * | 2015-05-22 | 2015-08-12 | 四川南车共享铸造有限公司 | Method for casting diesel engine rack |
| CN105728651A (en) * | 2016-02-22 | 2016-07-06 | 江苏钜源机械有限公司 | Preset inner core integral forming method for evanescent mold for complex workpiece |
| CN114178480A (en) * | 2021-12-08 | 2022-03-15 | 中国航发南方工业有限公司 | Modular pouring system of integral precision casting and preparation method thereof |
-
2006
- 2006-04-25 CN CN 200610039860 patent/CN1843657A/en active Pending
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972844A (en) * | 2010-10-28 | 2011-02-16 | 黄元吉 | Production process for applying expendable pattern casting technology to vermicular-iron diesel engine |
| CN102198488A (en) * | 2011-04-19 | 2011-09-28 | 滁州金诺实业有限公司 | Method for manufacturing casting blank of refrigerator inner container die by using lost foam casting process |
| CN102319659A (en) * | 2011-08-19 | 2012-01-18 | 东风汽车股份有限公司 | Cylinder body main body core dip-coating process |
| CN102284679A (en) * | 2011-09-19 | 2011-12-21 | 滁州金诺实业有限公司 | Method for casting engine cylinder cover by using lost foam |
| CN102310163A (en) * | 2011-09-19 | 2012-01-11 | 滁州金诺实业有限公司 | Lost foam casting method of engine gear chamber |
| CN102310162A (en) * | 2011-09-19 | 2012-01-11 | 滁州金诺实业有限公司 | Novel technology for casting engine cylinder body by lost foam |
| CN103212668A (en) * | 2012-01-18 | 2013-07-24 | 浙江派尼尔机电有限公司 | Method for manufacturing outboard engine cylinder |
| CN103372630A (en) * | 2012-04-25 | 2013-10-30 | 河北瑞丰动力缸体有限公司 | Evanescent mode production process of engine cylinder body |
| CN103372630B (en) * | 2012-04-25 | 2017-07-04 | 河北瑞丰动力缸体有限公司 | A kind of evaporative pattern production technology of engine cylinder-body |
| CN103480816A (en) * | 2012-06-12 | 2014-01-01 | 安庆中船柴油机有限公司 | Casting process for cylinder cover of marine air cylinder |
| CN103480816B (en) * | 2012-06-12 | 2016-03-30 | 安庆中船柴油机有限公司 | A kind of ship cylinder casting process of cylinder cap |
| CN102744365A (en) * | 2012-06-21 | 2012-10-24 | 常州市常协柴油机机体有限公司 | Lost foam casting method of cylinder of single cylinder diesel engine |
| CN103801654A (en) * | 2012-11-06 | 2014-05-21 | 北汽福田汽车股份有限公司 | Method used for manufacturing die foam full model |
| CN103008562A (en) * | 2012-11-27 | 2013-04-03 | 天长缸盖有限公司 | Vertical casting device for integral cylinder head casting |
| CN104028695A (en) * | 2014-05-12 | 2014-09-10 | 浙江机电职业技术学院 | Cavity-pasting full-mold casting method |
| CN104028695B (en) * | 2014-05-12 | 2016-06-01 | 浙江机电职业技术学院 | A kind of subsides chamber cavityless casting method |
| 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 |
| CN104368762A (en) * | 2014-09-22 | 2015-02-25 | 广西玉柴机器股份有限公司 | Aluminum alloy diesel engine cylinder cover casting method |
| CN104826989A (en) * | 2015-05-22 | 2015-08-12 | 四川南车共享铸造有限公司 | Method for casting diesel engine rack |
| CN105728651A (en) * | 2016-02-22 | 2016-07-06 | 江苏钜源机械有限公司 | Preset inner core integral forming method for evanescent mold for complex workpiece |
| CN114178480A (en) * | 2021-12-08 | 2022-03-15 | 中国航发南方工业有限公司 | Modular pouring system of integral precision casting and preparation method thereof |
| CN114178480B (en) * | 2021-12-08 | 2024-05-14 | 中国航发南方工业有限公司 | Modularized pouring system of integral precise casting and preparation method thereof |
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