CN101391280B - Special-shaped salt core for press casting - Google Patents
Special-shaped salt core for press casting Download PDFInfo
- Publication number
- CN101391280B CN101391280B CN 200710113017 CN200710113017A CN101391280B CN 101391280 B CN101391280 B CN 101391280B CN 200710113017 CN200710113017 CN 200710113017 CN 200710113017 A CN200710113017 A CN 200710113017A CN 101391280 B CN101391280 B CN 101391280B
- Authority
- CN
- China
- Prior art keywords
- salt core
- special
- casting
- core
- powder
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention provides a special salt core for pressure casting, which belongs to a salt core used for the pressure casting of piston roughcast, and raw materials for making the salt core include sodium chloride powder, rutile type titanium oxide powder and aluminum oxide powder. The salt core has advantages of high strength, high density and low expansion coefficient after the high-pressure pressing and sintering through adding ceramic materials such as rutile type titanium oxide and aluminum oxide in common salt. The salt core is mainly used for the casting at the pressure of 1MPa to 200MPa, and can also be used for the common casting. Besides the usage for casting aluminum piston roughcast, the salt core can also be used as the core for pressure-casting other non-ferrous alloys.
Description
Technical field
The invention provides a kind of salt core, used salt core during especially a kind of piston blank compression casting.
Background technology
In recent years, more and more stricter both at home and abroad to the requirement of internal combustion engine tail gas discharge, and, cause the temperature in the cylinder also constantly to raise along with the improving constantly of power of IC engine density, also just more and more higher to the performance requirement of the all-aluminium piston on the internal combustion engine.All-aluminium piston is the core component of internal combustion engine, and it directly touches high-temperature fuel gas, has born HTHP, the working environment very severe, and aluminum alloy materials is along with the rising of temperature, mechanical performance constantly reduces.After temperature was elevated to a certain degree, mechanical performances such as the intensity of aluminum alloy materials just can not satisfy the job requirement of engine.In order to address this problem, by after soluble core (using single salt manufacturing) is casted into piston crown more, water dissolves the salt core to people again at piston crown, forms cavity, the cooling duct when working in the future as piston.In engine working process, reach the purpose that reduces piston temperature by spraying into oil in the cooling oil duct of nozzle in piston.For improving the service behaviour under the piston high temperature, when making the diesel engine piston of high-power, high power density, piston blank adopts the compression casting mode, aluminium alloy crystallization under pressure, make crystal grain obtain refinement, thereby improve the intensity fatigue at high temperature performance of piston material particularly under the piston material high temperature.At present, the salt core is mainly made by salt, and the intensity of salt core, density are too low, can not be used for compression casting.
Summary of the invention
Technical problem to be solved by this invention is, a kind of special-shaped salt core for press casting is provided, with the compression casting of the piston blank of realizing having inner cooling path.
The present invention is achieved in that special-shaped salt core for press casting, and by weight percentage, the raw material of making the salt core consists of:
Sodium chloride powder 60-95%
Titanium Dioxide Rutile Top grade powder 3-30%
Alumina powder 2-10%.
This salt core, by adding ceramic materials such as Titanium Dioxide Rutile Top grade, aluminium oxide in salt, behind high pressure compacting and sintering, the intensity height, density is big, the coefficient of expansion is low.It is mainly used in the compression casting of 1Mpa～200Mpa, also can be used for conventional cast.Except that the casting that can be used for aluminum piston blank, also can be used as the core that other non-ferrous alloy compression castings are used.
Description of drawings
Fig. 1 is the vertical view of a kind of salt cored structure of the present invention.
Fig. 2 is half expanded view of the salt core of structure shown in Figure 1.
Fig. 3 is the C-C profile of Fig. 1.
Fig. 4 is the vertical view of another kind of salt cored structure of the present invention.
Fig. 5 is the A-A profile of Fig. 4.
Fig. 6 is the B-B profile of Fig. 4.
The specific embodiment
Further specify the present invention below.
The production method of special-shaped salt core for press casting, described production method is, with granularity is that 30～300 purpose sodium chloride powder, granularity are that 300～400 purpose Titanium Dioxide Rutile Top grade powder and granularity are after 300～400 purpose alumina powders mix, in steel mould, add the pressure compression moulding of 100Mpa～200Mpa, under 700 ℃～740 ℃ temperature, high temperature sintering 4～5 hours is made the salt core again.During high temperature sintering, can adopt the mode of multi-steps sintering.
As shown in Figure 1-Figure 3, the global shape of described salt core is rounded, sees top edge of salt core (1) and lower limb (2) undulate from the side.This is a kind of corrugated special-shaped salt core.The quantity of wave and the angle of crest can be adjusted as required.The global shape of salt core is meant the shape of seeing from vertical view.Crest and trough place should be rounding off.
As Fig. 4-shown in Figure 6, the global shape of described salt core is rounded, and a pair of shape of a saddle projection (3) of symmetry is arranged on the salt core, other part rounding ofves of shape of a saddle projection and salt core, and the lower surface of shape of a saddle projection (5) is a groove surface.This is a kind of saddle-shaped special-shaped salt core, and shape of a saddle bossing forms the oil-in and the oil-out of piston cooling oil duct in the future.
Adopt above-mentioned special-shaped salt core, under the prerequisite that does not influence the piston bulk strength, strengthened the surface area of the inner cooling path of salt core formation, strengthened cooling effect.By finite element analysis and installation experiment, compare with the piston of the inner cooling path of common shape, adopt the piston of the inner cooling path that above-mentioned special-shaped salt core forms, its top and the first annular groove temperature reduce more than 10 ℃, and its bulk strength does not reduce.The salt core of present common shape is generally the identical cylindrical revolving body of cross sectional shape, though simple in structure, easy manufacturing, the inner cooling path surface area that forms is little in the future, and cooling effect is relatively poor.
Through hole (4) is arranged on described shape of a saddle projection (3).Dissolving and flushing that piston blank is made back salt core are convenient in the existence in this hole.
Embodiment 1
By weight percentage, the raw material of making the salt core consists of:
Sodium chloride powder 60%
Titanium Dioxide Rutile Top grade powder 30%
Alumina powder 10%.
Production method is, is that 300 purpose sodium chloride powder, granularity are that 300 purpose Titanium Dioxide Rutile Top grade powder, granularity are after 400 purpose alumina powders mix, in steel mould with granularity, add the pressure compression moulding of 200Mpa, under 740 ℃ of temperature, high temperature sintering 4 hours is made the salt core again.The steel die that adopts has Fig. 1-corrugated core shown in Figure 3 chamber, thereby makes corrugated special-shaped salt core.
By weight percentage, the raw material of making the salt core consists of:
Sodium chloride powder 80%
Titanium Dioxide Rutile Top grade powder 15%
Production method is, is that 60 purpose sodium chloride powder, granularity are that 400 purpose Titanium Dioxide Rutile Top grade powder, granularity are after 300 purpose alumina powders mix, in steel mould with granularity, add the pressure compression moulding of 100Mpa, under 700 ℃ of temperature, high temperature sintering 5 hours is made the salt core again.The steel die that adopts has Fig. 4-saddle-shaped core shown in Figure 6 chamber, thereby makes saddle-shaped special-shaped salt core.
Embodiment 3
By weight percentage, the raw material of making the salt core consists of:
Sodium chloride powder 95%
Titanium Dioxide Rutile Top grade powder 3%
Production method is with embodiment 1.
Claims (5)
1. special-shaped salt core for press casting is characterized in that, by weight percentage, the raw material of making the salt core consists of:
Sodium chloride powder 60-95%
Titanium Dioxide Rutile Top grade powder 3-30%
Alumina powder 2-10%.
2. special-shaped salt core for press casting as claimed in claim 1 is characterized in that the global shape of described salt core is rounded, sees top edge of salt core (1) and lower limb (2) undulate from the side.
3. special-shaped salt core for press casting as claimed in claim 1, it is characterized in that the global shape of described salt core is rounded, a pair of shape of a saddle projection (3) of symmetry is arranged on the salt core, other part rounding ofves of shape of a saddle projection and salt core, the lower surface of shape of a saddle projection (5) is a groove surface.
4. special-shaped salt core for press casting as claimed in claim 3 is characterized in that, through hole (4) is arranged on the described shape of a saddle projection (3).
5. the production method of special-shaped salt core for press casting as claimed in claim 1, it is characterized in that, with granularity is that 30-300 purpose sodium oxide molybdena powder, granularity are that 300-400 purpose Titanium Dioxide Rutile Top grade powder and granularity are after 300-400 purpose alumina powder mixes, in steel mould, add the pressure compression moulding of 100MPa-200MPa, under 700 ℃ of-740 ℃ of temperature, high temperature sintering 4-5 hour, make the salt core again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710113017 CN101391280B (en) | 2007-09-18 | 2007-09-18 | Special-shaped salt core for press casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710113017 CN101391280B (en) | 2007-09-18 | 2007-09-18 | Special-shaped salt core for press casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101391280A CN101391280A (en) | 2009-03-25 |
| CN101391280B true CN101391280B (en) | 2011-02-09 |
Family
ID=40491899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710113017 Expired - Fee Related CN101391280B (en) | 2007-09-18 | 2007-09-18 | Special-shaped salt core for press casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101391280B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399865A (en) * | 2014-12-01 | 2015-03-11 | 湖南江滨机器（集团）有限责任公司 | Water-soluble graphite composited salt core material, graphite composited salt core and preparation method thereof |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010026597A1 (en) * | 2010-07-08 | 2012-01-12 | Mahle International Gmbh | Method for producing a cylinder for a two-stroke engine and casting core therefor |
| CN103722121B (en) * | 2014-01-08 | 2016-06-29 | 湖南江滨机器（集团）有限责任公司 | A kind of phosphate composite material and preparation method thereof and salt core |
| CN104353814B (en) * | 2014-10-28 | 2016-08-24 | 山东滨州渤海活塞股份有限公司 | Alumina fibre titan oxide particles strengthens interior cold ring-mounted piston blank manufacture method |
| CN110773705A (en) * | 2018-07-12 | 2020-02-11 | 北京三未科技发展有限公司 | Salt core of engine piston and preparation and application methods thereof |
| CN108994262A (en) * | 2018-08-30 | 2018-12-14 | 湖南江滨机器（集团）有限责任公司 | Cooling oil duct salt core sintering method in a kind of aluminum piston |
| KR102174238B1 (en) * | 2019-11-19 | 2020-11-05 | 엠에이치기술개발 주식회사 | Multicore for die casting and Preparation method of hollow product using the same |
| CN116274878B (en) * | 2023-03-03 | 2024-07-30 | 九牧厨卫股份有限公司 | Salt core material, salt core for titanium alloy casting and preparation method of salt core |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4446906A (en) * | 1980-11-13 | 1984-05-08 | Ford Motor Company | Method of making a cast aluminum based engine block |
| CN1365306A (en) * | 1999-07-06 | 2002-08-21 | 株式会社技术连合 | Disintegrative core for high pressure casting, method for manufacturing the same and method for extracting the same |
| CN1994615A (en) * | 2006-12-11 | 2007-07-11 | 东风汽车有限公司 | Salt core of engine piston and preparation method |
-
2007
- 2007-09-18 CN CN 200710113017 patent/CN101391280B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4446906A (en) * | 1980-11-13 | 1984-05-08 | Ford Motor Company | Method of making a cast aluminum based engine block |
| CN1365306A (en) * | 1999-07-06 | 2002-08-21 | 株式会社技术连合 | Disintegrative core for high pressure casting, method for manufacturing the same and method for extracting the same |
| CN1994615A (en) * | 2006-12-11 | 2007-07-11 | 东风汽车有限公司 | Salt core of engine piston and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 方向阳等.盐芯铝活塞用盐芯.《河南科技》.2006,(第3期),32. * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399865A (en) * | 2014-12-01 | 2015-03-11 | 湖南江滨机器（集团）有限责任公司 | Water-soluble graphite composited salt core material, graphite composited salt core and preparation method thereof |
| CN104399865B (en) * | 2014-12-01 | 2016-08-24 | 湖南江滨机器（集团）有限责任公司 | A kind of water-soluble graphite complex salt core material, graphite complex salt core and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101391280A (en) | 2009-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101391280B (en) | Special-shaped salt core for press casting | |
| CN103658545B (en) | A kind of method of cross beam type salt core compacting tool set and manufacture salt core thereof | |
| CN102489671B (en) | Salt core pressing mould, method for manufacturing salt core by using salt core pressing mould and manufactured salt core | |
| CN201326734Y (en) | Composite piston | |
| JP2009257187A (en) | In-cylinder fuel-injection type internal combustion engine, piston for in-cylinder fuel-injection type internal combustion engine and process for manufacturing piston for in-cylinder fuel-injection type internal combustion engine | |
| CN104399865B (en) | A kind of water-soluble graphite complex salt core material, graphite complex salt core and preparation method thereof | |
| CN101269401B (en) | Highly tenacious soluble composite material salt core and production method | |
| CN100516491C (en) | Piston of high power diesel engine and method for fabricating same | |
| CN104014763A (en) | Method for manufacturing aluminum borate crystal whisker enhancement combustor throat embedded ring inner-cooling aluminum piston | |
| CN204082362U (en) | New ceramics armouring internal combustion engine | |
| CN203457455U (en) | Thin shell structure | |
| CN103212690B (en) | A kind of extrusion casting method of aluminium piston of IC engine | |
| CN107812895A (en) | A kind of method of salt core compacting tool set and its salt core of manufacture and its manufacture salt core | |
| CN207787618U (en) | A kind of salt core compacting tool set and its salt core of manufacture | |
| CN2876350Y (en) | Piston structure of diesel oil engine | |
| CN104353814A (en) | Method for manufacturing alumina fiber and titanium oxide particle-reinforced inner-cooling insert ring piston blanks | |
| CN213915992U (en) | Groove type salt core for piston top | |
| CN203374363U (en) | Diesel engine power cylinder combination mechanism | |
| CN111906247A (en) | Preparation process of supercharger turbine for national six-emission heavy diesel engine | |
| CN108071515B (en) | A kind of reproducing method of steel pistons | |
| CN1152189C (en) | Aluminium piston of IC engine and its casting method | |
| CN109519298A (en) | A kind of built-up piston | |
| CN213495709U (en) | Manufacturing die for extruding piston pin hole copper bush | |
| CN203737945U (en) | Pressing die for crossbeam-type salt core | |
| CN203356535U (en) | Sand core structure used for formation of motor cylinder body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170726 Address after: 256600 No. twenty-one, No. 569, Bohai Road, Shandong, Binzhou Patentee after: BINZHOU BOHAI PISTON Co.,Ltd. Address before: 256600 No. twenty, No. 999, Bohai Road, Shandong, Binzhou Patentee before: SHANDONG BINZHOU BOHAI PISTON Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20210918 |