CN103212668A - Method for manufacturing outboard engine cylinder - Google Patents
Method for manufacturing outboard engine cylinder Download PDFInfo
- Publication number
- CN103212668A CN103212668A CN2012100160228A CN201210016022A CN103212668A CN 103212668 A CN103212668 A CN 103212668A CN 2012100160228 A CN2012100160228 A CN 2012100160228A CN 201210016022 A CN201210016022 A CN 201210016022A CN 103212668 A CN103212668 A CN 103212668A
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- engine cylinder
- sandbox
- cylinder block
- mould
- gasification
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a method for manufacturing an outboard engine cylinder. The method is a lost foam casting method and is characterized in that a foam plastic polymer material is manufactured into a foam plastic gasification mold having the size and the structure the same as a size and a structure of a part needing to be casted; the foam plastic gasification mold is put into a sand box and is subjected to three-dimensional vibration molding; a melted metal liquid is poured into the sand box under negative pressure so that the foam plastic gasification mold is completely vaporized by heat thereby being replaced by the poured metal liquid; and the metal liquid is cooled and solidified into the outboard engine cylinder. The lost foam casting method avoids mold tanking-out, a parting surface and a sand core. The outboard engine cylinder obtained by the method has no burr and flashing and no pattern draft, has smooth and unblocked inner chambers of air passages and water passages, improves engine power and reduces oil consumption.
Description
Technical field
The application relates to casting technology field, particularly relates to shipboard cylinder manufacture method.
Background technology
At present, the shipboard engine cylinder block adopts high-pressure casting or low pressure casting, the employing low pressure casting comprises: mulling, following core, molding, mould assembling, operations such as somatotype, its production cycle is long, production efficiency is low, and because following core, molding, casting flaw that processing steps such as mould assembling cause and percent defective height, yield rate is low, particularly cylinder block air flue and the water channel inner chamber inaccurate casting section thickness that causes in the inaccurate or following core position of rermilion core size in casting process is inhomogeneous, air flue and water channel inner chamber have die joint, core, therefore foundry goods has overlap, burr and pattern draft, air flue and water channel inner chamber be not smooth eddy current, if the assembling of core position is not in place, very easily cause air flue and water channel to stop up, and then cause engine to damage, make the power of engine cylinder block not reach technical indicator.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of shipboard engine cylinder block manufacture method, and with the power of realizing the engine cylinder block air flue and the water channel inner surface is smooth, smoothness improves engine, reduction oil consumption, technical scheme is as follows:
A kind of shipboard engine cylinder block manufacture method comprises:
Structure and size making bubble according to engine cylinder block are moulded the gasification mould;
Described bubble is moulded gasification mould master close the back oven dry;
Bubble after oven dry is moulded gasification die surface spray refractory coating, dries once more;
Sandbox is placed on the three-dimensional jolt ramming platform, and in described sandbox, insert bed load jolt ramming and strickling;
Described bubble after the oven dry is moulded the gasification mould place on the described bed load, and be divided into back-up sand by technological requirement, the case mouth is wipeed in jolt ramming automatically off behind the Preset Time;
On described sandbox, place cup, and connect negative pressure system;
The molten steel of in described sandbox, casting;
Discharge vacuum and mould turnover after the foundry goods condensation, obtain engine cylinder block.
Preferably, described bubble mould the gasification mould material be expandable polystyrene, expandability polymethyl methacrylate or expandable copolymer resin.
Preferably, before placing cup on the described sandbox, also comprise with plastic sheeting covering the sandbox mouth.
The technical scheme that is provided by above the embodiment of the present application as seen, described shipboard engine cylinder block adopts the lost-foam casting method manufacturing, described lost-foam casting method is to be made into and want the duplicate bubble of cast components physical dimension to mould the gasification mould with the foamed plastics macromolecular material, and with bubble mould the gasification mould place sandbox through the three-dimensional vibrating moulding, sandbox pours into molten metal liquid under negative pressure state, making bubble mould the gasification of being heated of gasification mould disappears, and then the metal liquid that is poured into replacement, treat to obtain the engine cylinder block foundry goods after the metal liquid cooled and solidified.Lost-foam casting method need not delivery does not have die joint, no core, thereby the foundry goods that obtains do not have overlap, burr and pattern draft, and the shipboard engine cylinder block air flue and the water channel inner chamber that obtain are smooth, smooth, have improved the power of engine and have reduced oil consumption.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, the accompanying drawing that describes below only is some embodiment that put down in writing among the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The manufacture method flow chart of a kind of shipboard engine cylinder block that Fig. 1 provides for the embodiment of the present application;
The sectional structure schematic diagram of a kind of shipboard engine cylinder block that Fig. 2 provides for the embodiment of the present application;
The plan structure schematic diagram of a kind of shipboard engine cylinder block that Fig. 3 provides for the embodiment of the present application;
Fig. 4 shows the cutaway view of the B-B direction of Fig. 3;
Fig. 5 illustrates the cutaway view of the A-A direction of Fig. 3.
The specific embodiment
In order to make those skilled in the art person understand technical scheme among the application better, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all should belong to the scope of the application's protection.
See also Fig. 1, show the flow chart of a kind of shipboard engine cylinder block of the embodiment of the present application manufacture method, this method mainly comprises:
S101 moulds the gasification mould according to the structure and the size making bubble of engine cylinder block.
Concrete, adopt the foamed plastics macromolecular material to make and mould the gasification mould with the structure and the identical bubble of size of engine cylinder block; Described foamed plastics macromolecular material is specifically as follows expandable polystyrene, expandability polymethyl methacrylate or expandable copolymer resin.
S102 moulds gasification mould master with described bubble and closes the back oven dry.
S103, the bubble after oven dry mould gasification die surface spray refractory coating, dry once more.
S104 places sandbox on the three-dimensional jolt ramming platform, and inserts bed load jolt ramming and strickling in described sandbox.
S105 moulds the gasification mould with the described bubble after the oven dry and places on the described bed load, and is divided into back-up sand by technological requirement, and the case mouth is wipeed in jolt ramming automatically off behind the Preset Time.
S106 places cup on described sandbox, and connects negative pressure system.
Concrete, cover the sandbox mouth with plastic sheeting, and put cup, connect negative pressure system, make to form negative pressure in the sandbox, what help liquid metals fills type and feeding, has improved dense structure's degree gradually.
S107, the molten steel of in described sandbox, casting.
The molten steel of casting in described sandbox, bubble are moulded the gasification of gasification mould and are disappeared, and make molten steel replace the position that described bubble is moulded the gasification mould, thereby obtain moulding the identical engine cylinder block of gasification die structure size with bubble.
S108 discharges vacuum and mould turnover after the foundry goods condensation, obtain the shipboard engine cylinder block.
Treat to discharge vacuum and mould turnover after the condensation gradually, take out engine cylinder block gradually, carry out next one circulation.
Lost-foam casting method has been cancelled the core and the coremaking Ministry of worker, thereby eradicated because coremaking, the casting flaw and the waste product that cause of core down, simultaneously, this not mould assembling of casting method, delivery not, simplify formative technology greatly, eliminated the casting flaw and the waste product that cause because of delivery, mould assembling; Casting method adopts the dry moulding of adhesive-free, no moisture, no any additive, thereby has eradicated because various casting flaws and the waste product that moisture, additive and binding agent cause; Lost-foam casting method need not delivery does not have die joint, no core, thereby the foundry goods that obtains do not have overlap, burr and pattern draft, and the engine cylinder block air flue and the water channel inner chamber that obtain are smooth, smooth, have improved the power of engine, and have reduced oil consumption.Can alleviate casting weight, reduce production costs.
See also table 1, show the external characteristics contrast of the shipboard engine cylinder block of lost-foam casting method manufacturing and the shipboard engine cylinder block body that low-pressure casting method is made.
By the data in the table 1 as can be known, under the identical situation of rotating speed, the high 1.5kw of power of the shipboard engine cylinder block output of the low pressure casting that the power ratio that the shipboard engine cylinder block that adopts lost-foam casting method to obtain is exported is traditional, and the low 1.5g/kmh of fuel consumption.
Table 1
See also Fig. 2-Fig. 5, Fig. 2 shows shipboard engine cylinder block cutaway view; Fig. 3 shows the plan structure schematic diagram that utilizes the cylinder that above-mentioned shipboard engine cylinder block manufacture method obtains; Fig. 4 shows the cutaway view of the B-B direction of Fig. 3; Fig. 5 illustrates the cutaway view of the A-A direction of Fig. 3.
As shown in the figure, the water channel 11 and the air flue 12 of the shipboard engine cylinder block that distributing on every side of cylinder 1, as shown in Figure 4 and Figure 5, utilize the inner wall smooth of the water channel 11 in the shipboard engine cylinder block that above-mentioned shipboard engine cylinder block manufacture method obtains and do not block, improved the yield rate of shipboard engine cylinder block, improve the power of engine, and reduced oil consumption.Can alleviate casting weight, reduce production costs.
The above only is the application's the specific embodiment; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the application's protection domain.
Claims (3)
1. a shipboard engine cylinder block manufacture method is characterized in that, comprising:
Structure and size making bubble according to engine cylinder block are moulded the gasification mould;
Described bubble is moulded gasification mould master close the back oven dry;
Bubble after oven dry is moulded gasification die surface spray refractory coating, dries once more;
Sandbox is placed on the three-dimensional jolt ramming platform, and in described sandbox, insert bed load jolt ramming and strickling;
Described bubble after the oven dry is moulded the gasification mould place on the described bed load, and be divided into back-up sand by technological requirement, the case mouth is wipeed in jolt ramming automatically off behind the Preset Time;
On described sandbox, place cup, and connect negative pressure system;
The molten steel of in described sandbox, casting;
Discharge vacuum and mould turnover after the foundry goods condensation, obtain engine cylinder block.
2. method according to claim 1 is characterized in that, the material that described bubble is moulded the gasification mould is expandable polystyrene, expandability polymethyl methacrylate or expandable copolymer resin.
3. method according to claim 1 is characterized in that, before placing cup on the described sandbox, also comprises with plastic sheeting covering the sandbox mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100160228A CN103212668A (en) | 2012-01-18 | 2012-01-18 | Method for manufacturing outboard engine cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100160228A CN103212668A (en) | 2012-01-18 | 2012-01-18 | Method for manufacturing outboard engine cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103212668A true CN103212668A (en) | 2013-07-24 |
Family
ID=48811008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100160228A Pending CN103212668A (en) | 2012-01-18 | 2012-01-18 | Method for manufacturing outboard engine cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN103212668A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077481A (en) * | 2016-08-04 | 2016-11-09 | 安徽兴达动力机械有限公司 | A kind of casting method of cylinder of petrol engine |
| CN106583649A (en) * | 2016-12-21 | 2017-04-26 | 重庆市合川区银窝铸造厂 | Casting process for casting motorcycle engine cylinder block |
| CN106734910A (en) * | 2016-12-21 | 2017-05-31 | 重庆市合川区银窝铸造厂 | A kind of method that use lost foam casting process carries out motorcycle precision part casting |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4787434A (en) * | 1986-12-29 | 1988-11-29 | Brunswick Corporation | Vacuum lift foam filled casting system |
| US4957153A (en) * | 1989-05-02 | 1990-09-18 | General Motors Corporation | Countergravity casting apparatus and method |
| US4971131A (en) * | 1989-08-28 | 1990-11-20 | General Motors Corporation | Countergravity casting using particulate filled vacuum chambers |
| JPH11151568A (en) * | 1997-11-21 | 1999-06-08 | Asahi Tec Corp | Lost form pattern casting method and cast product |
| CN1446648A (en) * | 2003-01-10 | 2003-10-08 | 刘立中 | Casting box reversal type technique in vanish mould casting |
| CN1628923A (en) * | 2003-12-15 | 2005-06-22 | 李自明 | Lost foam foundry method for engine cylinder |
| 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 |
| CN101554644A (en) * | 2008-04-10 | 2009-10-14 | 上海大众汽车有限公司 | Lost foam casting process suitable for aluminum alloy materials |
-
2012
- 2012-01-18 CN CN2012100160228A patent/CN103212668A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4787434A (en) * | 1986-12-29 | 1988-11-29 | Brunswick Corporation | Vacuum lift foam filled casting system |
| US4957153A (en) * | 1989-05-02 | 1990-09-18 | General Motors Corporation | Countergravity casting apparatus and method |
| US4971131A (en) * | 1989-08-28 | 1990-11-20 | General Motors Corporation | Countergravity casting using particulate filled vacuum chambers |
| JPH11151568A (en) * | 1997-11-21 | 1999-06-08 | Asahi Tec Corp | Lost form pattern casting method and cast product |
| CN1446648A (en) * | 2003-01-10 | 2003-10-08 | 刘立中 | Casting box reversal type technique in vanish mould casting |
| CN1628923A (en) * | 2003-12-15 | 2005-06-22 | 李自明 | Lost foam foundry method for engine cylinder |
| CN100446893C (en) * | 2003-12-15 | 2008-12-31 | 李自明 | Lost foam foundry method for engine cylinder |
| 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 |
| CN101554644A (en) * | 2008-04-10 | 2009-10-14 | 上海大众汽车有限公司 | Lost foam casting process suitable for aluminum alloy materials |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077481A (en) * | 2016-08-04 | 2016-11-09 | 安徽兴达动力机械有限公司 | A kind of casting method of cylinder of petrol engine |
| CN106583649A (en) * | 2016-12-21 | 2017-04-26 | 重庆市合川区银窝铸造厂 | Casting process for casting motorcycle engine cylinder block |
| CN106734910A (en) * | 2016-12-21 | 2017-05-31 | 重庆市合川区银窝铸造厂 | A kind of method that use lost foam casting process carries out motorcycle precision part casting |
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Application publication date: 20130724 |