CN1947888A - Mould for extrusion casting aluminium piston of interal combustion engine, and casting method therefor - Google Patents
Mould for extrusion casting aluminium piston of interal combustion engine, and casting method therefor Download PDFInfo
- Publication number
- CN1947888A CN1947888A CN 200610031578 CN200610031578A CN1947888A CN 1947888 A CN1947888 A CN 1947888A CN 200610031578 CN200610031578 CN 200610031578 CN 200610031578 A CN200610031578 A CN 200610031578A CN 1947888 A CN1947888 A CN 1947888A
- Authority
- CN
- China
- Prior art keywords
- piston
- extrusion
- mould
- die cavity
- casting
- 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.)
- Granted
Links
Images
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
A mould set for manufacturing high-performance aluminum piston of IC engine by extrusion casting is composed of movable mould, static mould, upper and lower moulding cores, extrusion chamber with extruding head in it, transverse pouring channel and moulding cavity. It features that the piston head in moulding cavity and said extrusion chamber and transverse pouring channel are on a same level. Its casing method is also disclosed.
Description
[technical field] the present invention relates to a kind of casting mould and casting method, specifically is a kind of mould and casting method thereof of extrusion casting aluminium piston of interal combustion engine.
[background technology] uses extrusion casint, the aluminium piston of IC engine of compression casting, its metal structure crystallization is fine and closely woven, even tissue, its technical performance of formed foundry goods near or reach the forging and pressing level of alloy of the same race, and do not forge and press each the guide property that exists, because crystalline structure is fine and closely woven, heat conduction is fast, and coefficient of thermal expansion is little, high temperature tensile strength height, wear-resistant, so the technical performance of this aluminium piston increases significantly than current gravitational casting piston, especially the piston of high-performance enginer is leaveed no choice but forging and pressing, extrusion casint is that compression casting can not at least, but forging and pressing piston cost is too high, and general engine producer is difficult to bear.Though extrusion casint and compression casting cost are low, the thickness of each vertical section of piston differs more than 10 times, and change of shape is very big, produce piston with extrusion casint and compression casting, and difficulty is very big.
For many years, many colleague honest patriots and scientific worker have carried out a large amount of engineer testings, research and exploration, through their effort, when secondary piston extrusion casint and compression casting have reached following state of arts:
(1) direct extrusion.Earlier aluminum melt is poured in the die cavity, last core with the piston extrusion die, be pressed in the die cavity as the extruding wedge, the crystalline structure that this pressing method forms piston is very fine and closely woven, do not have loose, the product strength height, but its shortcoming has two, one pours into the quantity and the temperature control of aluminum melt in the die cavity and wants tight, the aluminum solutions of high temperature pours in the die cavity through extruding, will equal the geometry of piston shaping embryo spare after solidifying and shrinking, otherwise the forming dimension of piston embryo spare does not reach specification requirement or because of aluminum melt is few, and make metal structure loose, thereby product percent of pass is low, and operating technology requires high; Its two owing in extruding, adopt core to be pressed into, so mould quick-wearing generally can only push 30000～50000 moulds and will scrap very much as wedge.
(2) indirect extrusion method.After exactly aluminum melt being poured into discharge chambe, compressing head is pressed into aluminum melt in the die cavity that assembles earlier, this kind extrusion, quantity and temperature control to solution must be too not tight, and not influencing the compact dimensions of piston embryo spare, mould is not fragile yet, but because the extruding force utilization rate is not high, crystalline structure in the extrusion piston embryo spare still has the loose and little shrinkage cavity of trace, so the not high shortcoming of product percent of pass.
So the piston squeeze casting technology can't reach application level both at home and abroad.
(3) compression casting piston.The disclosed CN02113974.1 patent of the inventor is a kind of compression casting; be applied to produce; this structure of piston characteristics are the stiffening rings that stud with aluminum based composite alloy at piston crown; the effect of this circle is that the combustion chamber lip of protection piston is difficult for bursting; again can be with the piston crown attenuate; its thickness equates substantially that with piston skirt thickness the quick injection of the compressed head of the aluminum solutions in the casting in the discharge chambe enters die cavity and fills type.So just reached the operational characteristic that compression casting adapts to the thin-section casting that wall thickness equates substantially, and energy compression casting aluminium piston, this patented technology has been developed and has been applied to and produced, but those do not need to inlay at piston crown the piston of stiffening ring, still can't the applying pressure casting.
[summary of the invention] for overcoming the above-mentioned defective of existing casting technique, the inventor draws the advantage of above several casting technique and gravitational casting, adds the accumulation of research for many years and experience, has invented a kind of brand-new aluminium piston Extrution casting technique finally.
Purpose of the present invention just provides a kind of mould and casting method of extrusion casting aluminium piston of interal combustion engine, to improve the quality that aluminium closes piston, reduces manufacturing cost.
For solving its technical problem, the technical solution adopted in the present invention is: the casting extrusion die of aluminium piston of IC engine of the present invention is made up of cover half, dynamic model, last core, following core, discharge chambe, cross gate, compressing head, the piston crown of die cavity and discharge chambe cross gate are in the position of same level height, and the piston crown of die cavity directly communicates with discharge chambe through cross gate.
The casting method of extrusion casting aluminium piston of interal combustion engine of the present invention comprises the steps:
1, mfg. moulding die, and mould is installed on the extruder, stand-by;
2, cast: aluminum melt is poured into the discharge chambe of mould, makes aluminum melt water the piston crown of full die cavity through cross gate with the horizontal flow velocity of nature;
3, the light pressure: the compressed head of extruder promotes aluminum melt, makes aluminum melt be full of piston skirt and whole die cavity fast.Its specific pressure is 10～15mpb, and extrusion time was 2～5 seconds;
4, suppress: extruder is to just suppressing immediately after gently pressing at crystallization, the compressed head of the piston that solidifies, and its specific pressure is 40～60Mpa, and extrusion time was 10～15 seconds;
5, the demoulding: open mould, core, following core just get the aluminium piston of IC engine embryo spare of extrusion casint moulding in the extraction.
The invention has the beneficial effects as follows:
1. because of the piston crown in the mold cavity of the present invention and discharge chambe cross gate in same level height position, aluminum melt waters that the piston crown of die cavity has been full of aluminum solutions behind the full discharge chambe, make its exhaust clean, solved the root of piston crown generation pore, the aluminum melt in the cross gate is compressed head and promotes the good whole die cavity of filling fast in the discharge chambe subsequently, and make the piston skirt moulding of thin-walled complete, cavity pressure makes the very fast cooling in piston skirt, impel the foundry goods consecutive solidification, the piston crown that focuses on die cavity is shunk in crystallization, at this moment directly to be expressed to wall thickness big with being about to extruding force for extruder, the temperature height, the piston crown of final set, therefore, adding the quantity of the aluminum melt in the discharge chambe and temperature must strict control and not influence the forming dimension and the metallic crystal of piston fine and closely woven.
2. adopt extrusion casting aluminium piston because of the present invention, make the metal structure of foundry goods fine and closely woven, there are not defects such as pine is dredged, shrinkage cavity, normal temperature strength and calorific intensity height, heat conduction is fast, and coefficient of thermal expansion is little, wear-resistant, detect through units such as national technology authoritative department Central South University, reached following expression level, and surpassed the countries concerned's technical standard.
| Technical parameter | Standard GB/T 1148-93 | The invention piston | Sample material |
| Room temperature tensile strength Mpa | 196 | 280～320 | ZL109 |
| Hardness HBs | 95-130 | 104～130 | ZL109 |
| 300 ℃ of tensile strength Mpa | 69 | More than 110 | ZL109 |
| 350 ℃ of tensile strength Mpa | Country does not have this standard | More than 95 | ZL109 |
| Volume stability | ≤0.03D | ≤0.025D | ZL109 |
| Circle of anti-appearance the and piston adhesion strength MPa | Be not less than 50 | Greater than 70 | ZL109 |
3. production method of the present invention is simple, but the technological parameter waviness is big, the product percent of pass height.
4. production cost is low, than the gravitational casting aluminium piston cost low 5～10% of product of the same race.
5. because the present invention gets togather directly extruding of back in set of molds, and mould is not fragile, die life can be pressed 80000～100000 moulds.
6. casting method of the present invention is watered youngly in the extrusion casint, do not have rising head again, so the utilization rate height of aluminum solutions, the aluminium loss is little.
[description of drawings] the present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the overall structure schematic diagram of squeeze casting mould of the present invention.
Fig. 2 is the B-B cutaway view among Fig. 1.
Fig. 3 is the A-A cutaway view among Fig. 1.
Among the figure: 1 dynamic model, 2 cover half, 3 cross gates, 4 discharge chambes, core on 5,6 die cavities, 7 times cores, 8 compressing heads.
[specific embodiment] is with reference to accompanying drawing: the casting mould of aluminium piston of IC engine is by cover half 2, dynamic model 1, cross gate 3, discharge chambe 4, last core 5, die cavity are piston body 6, and following core 7 and compressing head are formed, be characterized in piston crown in the die cavity and discharge chambe, cross gate in the position of same level height, and the piston crown of die cavity communicates with discharge chambe directly through cross gate.
The casting method of aluminium piston of IC engine comprises the steps: 1. mould to be installed on the extruder; 2. cast:, be poured into die cavity 6 through cross gate 3 the discharge chambe 4 of aluminum melt from mould; 3. gently press: the liquation that extruder promotes in 8 pairs of moulds of compressing head pushes, and makes aluminum melt be full of die cavity, and its specific pressure is 10～15Mpa, and extrusion time was 2～5 seconds; 4. suppress: extruder continue to promote compressing head, and the liquation in the mould is pushed with high pressure, and specific pressure is 40～60Mpa, 10～15 seconds of extrusion time; 5. the demoulding.Open mould, core, following core can take off, through extruding, cooled and solidified moulding aluminium piston embryo spare in the extraction.
Claims (2)
1, a kind of mould of extrusion casting aluminium piston of interal combustion engine, comprise dynamic model, cover half, last core, following core, die cavity, discharge chambe, cross gate, it is characterized in that: piston crown in the die cavity and discharge chambe, cross gate are in same level height position, and the piston crown of die cavity directly communicates with discharge chambe through cross gate.
2, the method for aluminium piston in a kind of extrusion casint internal combustion, it is characterized in that: it comprises the steps:
1. mfg. moulding die, an and mould that makes is placed on the extruder, and is stand-by;
2. cast: aluminum melt is poured into the discharge chambe of mould, makes aluminum melt water the piston crown of full die cavity earlier through cross gate with the horizontal flow velocity of nature;
3. gently press: the compressed head of extruder promotes aluminum melt, makes aluminum melt be full of piston skirt and whole die cavity fast, and specific pressure is 10～15Mpa, 2～5 seconds of extrusion time;
4. suppress: after 3. step gently pressed, the compressed immediately head of extruder was to just suppressing at crystallization, the piston crown that solidifies, and specific pressure is 40～60Mpa, and extrusion time was 10～15 seconds;
5. the demoulding: the piston with behind the extrusion solidification, take off from extruder, promptly obtain the aluminium piston of IC engine embryo spare of the extrusion casint of moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100315789A CN100496805C (en) | 2006-04-18 | 2006-04-18 | Mould for lquid forging, that is, extrusion casting aluminium piston of internal combustion engine, and casting method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100315789A CN100496805C (en) | 2006-04-18 | 2006-04-18 | Mould for lquid forging, that is, extrusion casting aluminium piston of internal combustion engine, and casting method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1947888A true CN1947888A (en) | 2007-04-18 |
| CN100496805C CN100496805C (en) | 2009-06-10 |
Family
ID=38017571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100315789A Expired - Fee Related CN100496805C (en) | 2006-04-18 | 2006-04-18 | Mould for lquid forging, that is, extrusion casting aluminium piston of internal combustion engine, and casting method therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100496805C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407317A (en) * | 2011-11-14 | 2012-04-11 | 西华大学 | Piston casting mould of engine and casting method of piston casting |
| CN103212690A (en) * | 2013-05-14 | 2013-07-24 | 滨州东海龙活塞有限公司 | Extruding and casting method of internal combustion engine aluminum piston |
| CN103862024A (en) * | 2012-12-17 | 2014-06-18 | 中国兵器工业第五二研究所 | Aluminum-aluminum composite piston and preparation method thereof |
| CN104028726A (en) * | 2014-04-25 | 2014-09-10 | 浙江工业大学 | Multi-directional extrusion casting mold for aluminum alloy transmission shell and casting method |
| CN106141141A (en) * | 2015-04-21 | 2016-11-23 | 浙江亚路铸造有限公司 | The piston of a kind of large aluminum alloy extrusion casint and foundry engieering thereof |
| CN113000813A (en) * | 2021-02-23 | 2021-06-22 | 广州和德轻量化成型技术有限公司 | Die and method for producing aluminum alloy composite piston by indirect extrusion casting process |
-
2006
- 2006-04-18 CN CNB2006100315789A patent/CN100496805C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407317A (en) * | 2011-11-14 | 2012-04-11 | 西华大学 | Piston casting mould of engine and casting method of piston casting |
| CN103862024A (en) * | 2012-12-17 | 2014-06-18 | 中国兵器工业第五二研究所 | Aluminum-aluminum composite piston and preparation method thereof |
| CN103862024B (en) * | 2012-12-17 | 2016-08-03 | 中国兵器科学研究院宁波分院 | Aluminum-aluminum composite piston and preparation method thereof |
| CN103212690A (en) * | 2013-05-14 | 2013-07-24 | 滨州东海龙活塞有限公司 | Extruding and casting method of internal combustion engine aluminum piston |
| CN103212690B (en) * | 2013-05-14 | 2016-03-02 | 滨州东海龙活塞有限公司 | A kind of extrusion casting method of aluminium piston of IC engine |
| CN104028726A (en) * | 2014-04-25 | 2014-09-10 | 浙江工业大学 | Multi-directional extrusion casting mold for aluminum alloy transmission shell and casting method |
| CN106141141A (en) * | 2015-04-21 | 2016-11-23 | 浙江亚路铸造有限公司 | The piston of a kind of large aluminum alloy extrusion casint and foundry engieering thereof |
| CN113000813A (en) * | 2021-02-23 | 2021-06-22 | 广州和德轻量化成型技术有限公司 | Die and method for producing aluminum alloy composite piston by indirect extrusion casting process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100496805C (en) | 2009-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101274361B (en) | Low speed vacuum squeeze casting technology | |
| CN100496805C (en) | Mould for lquid forging, that is, extrusion casting aluminium piston of internal combustion engine, and casting method therefor | |
| CN102615268B (en) | Antigravity squeeze casting device of aluminum alloy connecting rod and manufacture method | |
| CN106735086B (en) | A kind of casting device | |
| CN106141137A (en) | A kind of side core-pulling extruding die casting equipment and production method | |
| CN102240791B (en) | Device and method for hydraulic injection filled type extrusion cast forming of molten aluminum magnesium alloy | |
| CN200957453Y (en) | Vacuum die-casting mould | |
| CN1048201C (en) | Method and equipment for feeding shrinkage voids in metal castings | |
| CN1302875C (en) | Vacuum, gravity and precision casting method with metallic mould | |
| CN106623856B (en) | A kind of method and apparatus improving extrusion casint Piston Casting quality | |
| CN105499524A (en) | Round steel casting method, casting steel mold and support device thereof | |
| CN202461484U (en) | Automobile air conditioning compressor cylinder body die-casting die | |
| CN202224632U (en) | Camshaft bracket casting die with local extrusion device | |
| CN2808361Y (en) | Center casting die for horizontal die-casting machine | |
| CN110899630B (en) | Aluminum alloy casting mold capable of improving casting defects | |
| CN1323783C (en) | Magnesium alloy hub pressure casting apparatus and method thereof | |
| CN103212690B (en) | A kind of extrusion casting method of aluminium piston of IC engine | |
| CN203091715U (en) | Die-casting die used for thin-wall aluminum alloy outer shell | |
| CN103100696A (en) | Metal mold gravity casting method | |
| CN109986057B (en) | Aluminum alloy made household air conditioner stop valve and manufacturing method thereof | |
| CN109622918B (en) | Injection molding die and molding method for zinc-based alloy pipe | |
| CN208866381U (en) | A kind of low porosity part extrusion die | |
| CN114682765A (en) | Low-pressure casting die for aluminum gear chamber | |
| CN217964716U (en) | One-die-to-two-die production die for extrusion casting of aluminum alloy engine support | |
| CN214185188U (en) | Novel die-casting die structure |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20110418 |