CN202606805U - Gravity casting die with riser head on aluminum piston short shaft - Google Patents
Gravity casting die with riser head on aluminum piston short shaft Download PDFInfo
- Publication number
- CN202606805U CN202606805U CN 201220222069 CN201220222069U CN202606805U CN 202606805 U CN202606805 U CN 202606805U CN 201220222069 CN201220222069 CN 201220222069 CN 201220222069 U CN201220222069 U CN 201220222069U CN 202606805 U CN202606805 U CN 202606805U
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- China
- Prior art keywords
- piston
- die
- gravity casting
- external mold
- riser
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- 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
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Abstract
The utility model discloses a gravity casting die with a riser head on an aluminum piston short shaft. The gravity casting die comprises an outer die and a top die, wherein the outer die and the top die are flat-open casting machine dies with piston forming position characteristics, and are in clearance fit with each other; the outer die is provided with a riser head sleeve; the top die is provided with a heat insulating cavity; the riser head is sleeved on the outer side of a piston pin boss along the piston short shaft on the outer die; the heat insulating cavity is formed on the outer side of the piston pin boss on the top die along the piston short shaft; the riser head is formed by the inner cavity of a riser head sleeve and the heat insulating cavity; and the riser head sleeve is connected with the outer die through a wedged structure. The gravity casting die has the advantages of good feeding effect, low casting rejection rate, high process yield, high production efficiency, and no need of X-ray examination after finishing.
Description
Technical field
The utility model relates to a kind of gravity casting die of aluminium piston, relates in particular to the gravity casting die that rising head is set on a kind of aluminium piston minor axis.
Background technology
In the process of setting of piston foundry goods after cast in the aluminium Piston mould, the aluminium water that needs in the rising head carries out feeding to foundry goods, to obtain dense internal organization, not have the foundry goods of shrinkage porosite and shrinkage cavity defect.The gravity casting die rising head of aluminium piston generally is opened in top land or piston long axis direction.Yet the petrol engine piston generally has architectural features such as wall is thin, key seat is thick greatly, the wall thickness transition and linkage is bad for the casting mould technological design.In the cooled and solidified process of foundry goods, be unfavorable for setting up normal consecutive solidification, can't realize good feeding condition, thereby occur tissue looseness's phenomenon easily at the piston boss position, the serious form with shrinkage cavity occurs.Especially when piston-top surface all was casting plane for cooperating combustion requirements, owing to can't offer top riser, thick big key seat position will lean on the rising head of major axis to carry out feeding.Because feeding distance is far away, the feeding passage is narrow, key seat can not get abundant feeding and shrinkage cavity very easily occurs.Must take to increase the rising head size for strengthening the riser feeding effect, thick big feeding subsidy is set deals with to widen measures such as feeding passage, but so just cause aluminium water conservancy project skill yield rate low, this series products product yield is 35%～40%.While is big because of rising head, subsidy size, and the foundry goods cooling is slow, and production efficiency is very low.Adopt the inspection of X ray Dynamic Non-Destruction Measurement to still have piston about 5% to have the key seat shrinkage cavity behind the processed finished products and scrap.
The utility model content
The purpose of the utility model is exactly that product yield is low, the low-down problem of production efficiency for tissue looseness, shrinkage cavity appear in piston boss position easily that solve the prior art existence; A kind of gravity casting die that rising head is set on aluminium piston minor axis is provided; Have that feeding is effective, the foundary loss rate is low, product yield is high, production efficiency is high, do not need the advantage of X-ray examination behind the finished product.
To achieve these goals, the utility model adopts following technical scheme:
The gravity casting die of rising head is set on a kind of aluminium piston minor axis, comprises external mold and backform, external mold and backform are the flat casting machine die of opening that has piston shaping characteristic; External mold and backform adopt matched in clearance; External mold is provided with riser buss, and heat-insulation chamber is arranged on the backform, and said riser buss is located at the outside of the piston short-axis direction piston boss on the external mold; Described heat-insulation chamber be on the backform in the outside of piston short-axis direction piston boss, the inner chamber of riser buss and heat-insulation chamber form rising head.
Said riser buss is connected with external mold through wedge structure.
Described riser buss adopts the cenosphere insulating riser sleeve.
Be provided with thermal insulation in the described heat-insulation chamber and use rock wool.
The utility model operation principle: the utility model is employed in the gravity casting die that rising head is set on the aluminium piston minor axis; Riser buss is located at the outside of the piston short-axis direction piston boss on the external mold; Described heat-insulation chamber is in the outside of piston short-axis direction piston boss on the backform; The inner chamber of riser buss and heat-insulation chamber form rising head, and said riser buss is connected with external mold through wedge structure.Through rising head being arranged on the piston short-axis direction; The thick big key seat position of rising head and piston is nearest, and the direction of solidifying that so just can control foundry goods makes it to accord with the consecutive solidification principle, thereby foundry goods is set up good feeding condition in process of setting; And cooperate mould string water-cooled but to make shrinkage porosite be converted into shrinkage cavity as far as possible; Make shrinkage cavity appear at the place of foundry goods final set, the rising head at the place of foundry goods final set arrangement certain size just can make shrinkage cavity transfer in the rising head.
The beneficial effect of the utility model:
⑴ there are unimpeded feeding passage in rising head and piston between the thickest big key seat position, and the feeding capacity of rising head is the strongest, and the size of rising head can be accomplished minimum.
⑵ employing typing insulation cenosphere insulating riser sleeve is with the filling thermal insulation is effective with the riser head heat-preserving of the heat-insulation chamber composition of rock wool, cooling is slow, and setting time is later than the setting time of foundry goods greatly.
⑶ use aluminium water few, and product yield rises to 65%～70%.
⑷ foundry goods is little, and setting time shortens, and production efficiency has improved 50～60%.
⑸ do not find that through the inspection of X ray Dynamic Non-Destruction Measurement the key seat shrinkage cavity defect is arranged, and cancelled the defect detecting test of piston finished product afterwards.
Description of drawings
Fig. 1 is the utility model cast outer mold structure sketch map;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the utility model backform structural representation;
Fig. 4 is Fig. 3 left side pseudosection;
Among the figure, 1. external mold, 2. wedge, 3. riser buss, 4. pin-and-hole is 5. partially outer, 6. backform, 7. heat-insulation chamber, 8. adiabatic rock wool, 9. the combustion chamber shaped portion used
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
The gravity casting die of rising head is set on the aluminium piston minor axis, in Fig. 1, Fig. 2, Fig. 3, Fig. 4; Comprise external mold 1 and backform 6, external mold 1 is the flat casting machine die of opening that has piston shaping characteristic with backform 6, and external mold 1 adopts matched in clearance with backform 6; External mold 1 is provided with riser buss 3; Heat-insulation chamber 7 is arranged on the backform 6, and said riser buss 3 is located at the outside of the piston short-axis direction piston boss on the external mold 1, and described heat insulation 7 chambeies are in the outside of piston short-axis direction piston boss on the backform 6; The inner chamber of riser buss 3 and heat-insulation chamber 7 form rising head, and said riser buss 3 is connected with external mold 1 through wedge structure.Described riser buss 3 adopts the cenosphere insulating riser sleeve.Be provided with adiabatic in the described heat-insulation chamber 7 with rock wool 8.Specifically, piston pin hole 4 and outer inclined to one side 5 characteristics such as shaping such as piston such as grade are arranged on the external mold 1, riser buss 3 is embedded on the external mold 1 through wedge 2; And be arranged on the piston short-axis direction; Piston pin hole 4 is with outer inclined to one side more than 5, and riser buss 3 and wedge 2 are connected half of formation rising head with wedge structure.The piston shaping characteristic of combuster shaped portion 9 is offered heat-insulation chamber 7 on the backform 6 on backform, and fills thermal insulation with rock wool 8, with the complete rising head of riser buss 3 common compositions on the external mold 1.
Though the above-mentioned accompanying drawing that combines is described the specific embodiment of utility model; But be not restriction to the utility model protection domain; One of ordinary skill in the art should be understood that; On the basis of the technical scheme of the utility model, those skilled in the art need not pay various modifications that creative work can make or distortion still in the protection domain of the utility model.
Claims (4)
1. the gravity casting die of rising head is set on the aluminium piston minor axis, comprises external mold and backform, external mold and backform are the flat casting machine die of opening that has piston shaping characteristic; External mold and backform adopt matched in clearance, and external mold is provided with riser buss, and heat-insulation chamber is arranged on the backform; It is characterized in that; Said riser buss is located at the outside of the piston short-axis direction piston boss on the external mold, described heat-insulation chamber be on the backform in the outside of piston short-axis direction piston boss, the inner chamber of riser buss and heat-insulation chamber form rising head.
2. the gravity casting die of rising head is set on the aluminium piston minor axis as claimed in claim 1, it is characterized in that, said riser buss is connected with external mold through wedge structure.
3. the gravity casting die of rising head is set on the aluminium piston minor axis as claimed in claim 1, it is characterized in that, described riser buss adopts the cenosphere insulating riser sleeve.
4. the gravity casting die of rising head is set on the aluminium piston minor axis as claimed in claim 1, it is characterized in that, be provided with thermal insulation in the described heat-insulation chamber and use rock wool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220222069 CN202606805U (en) | 2012-05-17 | 2012-05-17 | Gravity casting die with riser head on aluminum piston short shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220222069 CN202606805U (en) | 2012-05-17 | 2012-05-17 | Gravity casting die with riser head on aluminum piston short shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202606805U true CN202606805U (en) | 2012-12-19 |
Family
ID=47340537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220222069 Expired - Fee Related CN202606805U (en) | 2012-05-17 | 2012-05-17 | Gravity casting die with riser head on aluminum piston short shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202606805U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624972A (en) * | 2013-11-14 | 2015-05-20 | 安徽省恒泰动力科技有限公司 | Filtering device for piston casting |
| CN107584075A (en) * | 2016-07-06 | 2018-01-16 | 科华控股股份有限公司 | It is a kind of to replace Runner Exhaust pin to save the structure of molten steel using rock wool pad |
| CN114799072A (en) * | 2022-05-20 | 2022-07-29 | 安徽省恒泰动力科技有限公司 | Feeding head mould of forming combustion chamber and feeding method thereof |
-
2012
- 2012-05-17 CN CN 201220222069 patent/CN202606805U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624972A (en) * | 2013-11-14 | 2015-05-20 | 安徽省恒泰动力科技有限公司 | Filtering device for piston casting |
| CN107584075A (en) * | 2016-07-06 | 2018-01-16 | 科华控股股份有限公司 | It is a kind of to replace Runner Exhaust pin to save the structure of molten steel using rock wool pad |
| CN114799072A (en) * | 2022-05-20 | 2022-07-29 | 安徽省恒泰动力科技有限公司 | Feeding head mould of forming combustion chamber and feeding method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20121219 Termination date: 20140517 |