CN108421956B - Engine cylinder cover casting mould and cylinder cap - Google Patents
Engine cylinder cover casting mould and cylinder cap Download PDFInfo
- Publication number
- CN108421956B CN108421956B CN201810321235.9A CN201810321235A CN108421956B CN 108421956 B CN108421956 B CN 108421956B CN 201810321235 A CN201810321235 A CN 201810321235A CN 108421956 B CN108421956 B CN 108421956B
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- CN
- China
- Prior art keywords
- sand core
- cylinder cap
- water jacket
- stem
- discarded
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4228—Helically-shaped channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4235—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4264—Shape or arrangement of intake or exhaust channels in cylinder heads of exhaust channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F2200/00—Manufacturing
- F02F2200/06—Casting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a kind of engine cylinder cover casting moulds, steel mould substance including sand core assembly and with sand core assembly Aided design, sand core assembly is fixed on steel mould substance, and sand core assembly includes sand core of water jacket, discarded channel sand core, exhaust duct sand core and air intake duct sand core；One end of sand core of water jacket is equipped with first row stomata stem, and the other end is equipped with second row stomata stem, and the middle part of sand core of water jacket is equipped with third gas vent stem；Sand core of water jacket is equipped with the discarded road of sand core for accommodating discarded channel sand core, and sand core, which is discarded, has gap between the inner wall and discarded channel sand core in road；Sand core of water jacket includes multiple cylinder cap shaped holes, is equipped with support column between two neighboring cylinder cap shaped hole and forms hole；The invention also discloses according to above-mentioned die casting at cylinder cap.The defects of present invention can not only improve or even avoid the stomata of fluid origin cylinder lid surface, pinprick, can also enhance the intensity of cylinder cap fire power face, prevent the deformation of fluid origin cylinder cap fire power face.
Description
Technical field
The present invention relates to engine art, especially a kind of engine cylinder cover casting mould and the cylinder using the die casting
Lid.
Background technique
Cylinder is closed when the effect of engine cylinder cover casting mould (hereinafter referred to as cylinder cap) and constitutes combustion chamber with cylinder,
The face for constituting combustion chamber is known as fire power face.
Currently, gravitational casting forming is generallyd use using the cylinder cap of more aluminium alloy, but in casting process, aluminium
Liquid submerges and wraps up sand core, since gas cannot be discharged in time in sand core, often result in casting it is loose, cylinder lid surface have stomata,
The casting flaws such as pin hole；And the cylinder cap of existing casting sand core casting, fire power face is mostly slab construction, during the test,
The deformation of cylinder cap is larger, easily leads to cylinder pad is poorly sealed and cylinder cap cracks etc..
Summary of the invention
The main object of the present invention is to provide a kind of engine cylinder cover casting mould, to solve deficiency in the prior art,
The defects of it can improve or even avoid the stomata of fluid origin cylinder lid surface, pinprick, and prevent fluid origin cylinder cap fire power face
Deformation.
It is a further object of the present invention to provide a kind of cylinder cap, it can improve or even avoid the gas formed when casting on surface
The defects of hole, pinprick；The intensity of cylinder cap fire power face is enhanced, can reduce or even avoid the deformation of cylinder cap fire power face.
To achieve the above object, the present invention provides the following technical solutions:
A kind of engine cylinder cover casting mould, the punching block sheet including sand core assembly and with the sand core assembly Aided design
Body, the sand core assembly are fixed on the steel mould substance, and the sand core assembly includes sand core of water jacket, discarded channel sand core, row
Air flue sand core and air intake duct sand core, the exhaust duct sand core and the air intake duct sand core are located at the two of the sand core of water jacket
Side, the discarded channel sand core are set to one end of the sand core of water jacket；
One end of the sand core of water jacket is equipped with first row stomata stem, and the other end is equipped with second row stomata stem, the water
The middle part for covering sand core is equipped with third gas vent stem；The sand core that the sand core of water jacket is equipped with the accommodating discarded channel sand core is useless
Road is abandoned, the sand core, which is discarded, has gap between the inner wall and the discarded channel sand core in road；The sand core of water jacket includes multiple
Cylinder cap shaped hole is equipped with support column between the two neighboring cylinder cap shaped hole and forms hole.
Engine cylinder cover casting mould above-mentioned, it is preferable that the first row stomata stem and the second row stomata core
The diameter of column is all larger than equal to 18mm.
Engine cylinder cover casting mould above-mentioned, it is preferable that the diameter of the third gas vent stem is more than or equal to 14mm.
Engine cylinder cover casting mould above-mentioned, it is preferable that have on the third gas vent stem and be axially arranged along it
Stomata.
Engine cylinder cover casting mould above-mentioned, it is preferable that the exhaust duct sand core is symmetrical structure comprising two points
Branch, and the surface of the exhaust duct sand core carries out airflow design.
Engine cylinder cover casting mould above-mentioned, it is preferable that the air intake duct sand core includes tangential air flue arranged side by side
Sand core and helical intake sand core, and the tangential air flue sand core is consistent with the direction of rotation of the helical intake sand core.
Engine cylinder cover casting mould above-mentioned, it is preferable that the steel mould substance includes bottom punching block and is sequentially set to institute
Front end punching block, air inlet side punching block, rear end punching block and the exhaust side punching block on four sides of bottom punching block are stated, the sand core assembly is fixed
On the bottom punching block.
A kind of cylinder cap according to die casting above-mentioned, the both ends of the cylinder cap are respectively equipped with side gas vent, the cylinder cap
Middle part be equipped with upper air-vent, one end of the cylinder cap is equipped with discarded channel, the cylinder cap close to the position of the side gas vent
Firepower surface side be equipped with many places support construction, the support construction be set to the cylinder cap two adjacent cylinder between.
Cylinder cap above-mentioned, it is preferable that the air intake duct of the cylinder cap includes tangential air flue and helical intake arranged side by side, and
The tangential air flue is consistent with the direction of rotation of the helical intake.
Cylinder cap above-mentioned, it is preferable that the exhaust duct of the cylinder cap is symmetrical structure comprising Liang Ge branch, and to described
The inner wall of exhaust duct carries out airflow design.
Compared with prior art, engine cylinder cover casting mould provided by the invention, sand core assembly include discarded channel
Sand core, the sand core that sand core of water jacket is equipped with the accommodating discarded channel sand core discard road, and the inner wall that sand core discards road leads to discarded
There is gap, then gas extra in sand core of water jacket or discarded channel sand core can be discharged from the gap, can be between road sand core
It prevents gas to be expelled directly out from sand core, can improve or even the stomata, the pinprick that avoid fluid origin engine cylinder cap surface etc. lacks
It falls into；And the middle part of sand core of water jacket is equipped with third gas vent stem, then the gas that sand core of water jacket generates when being poured can be discharged from,
Keep exhaust more smooth, the defects of can also improving or even avoid the stomata of fluid origin engine cylinder cap surface, pinprick；Separately
Outside, it is equipped with support column between cylinder cap shaped hole and forms hole, then the fire power face of fluid origin engine cylinder cover has support construction, increases
The strong intensity of cylinder cap fire power face, can reduce or even avoid the deformation of cylinder cap fire power face.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of sand core assembly；
Fig. 2 is the schematic view of the front view of sand core of water jacket；
Fig. 3 is the present invention looks up structural representation of sand core of water jacket；
Fig. 4 is the fit structure schematic diagram of sand core of water jacket Yu discarded channel sand core；
Fig. 5 is the structural schematic diagram of discarded channel sand core；
Fig. 6 is the structural schematic diagram of exhaust duct sand core；
Fig. 7 is the structural schematic diagram of air intake duct sand core；
Fig. 8 is the structural schematic diagram of steel mould substance；
Fig. 9 is the structural schematic diagram of cylinder cap.
Description of symbols:
1- sand core of water jacket, 11- first row stomata stem, 12- second row stomata stem, 13- third gas vent stem, 14-
Cylinder cap shaped hole, 15- support column form hole, and 16- sand core discards road, and 2- discards channel sand core, 3- exhaust duct sand core, 4- air intake duct
Sand core, 41- tangential air flue sand core, 42- helical intake sand core, the bottom 51- punching block, 52- air inlet side punching block, 53- exhaust side punching block,
The front end 54- punching block, the rear end 55- punching block, 61- discard channel, 62- support construction.
Specific embodiment
The embodiments described below with reference to the accompanying drawings are exemplary, for explaining only the invention, and cannot be construed to
Limitation of the present invention.
The embodiment of the present invention: a kind of engine cylinder cover casting mould, including sand core assembly and match with the sand core assembly
The steel mould substance of Analysis of Nested Design, the sand core assembly are fixed on the steel mould substance.As shown in Figure 1, the sand core assembly includes
Sand core of water jacket 1, discarded channel sand core 2, exhaust duct sand core 3 and air intake duct sand core 4, the exhaust duct sand core 3 and the air intake duct
Sand core 4 is located at the two sides of the sand core of water jacket 1, and the discarded channel sand core 2 is set to one end of the sand core of water jacket 1.Such as
Shown in Fig. 2 and Fig. 3, one end of the sand core of water jacket 1 is equipped with first row stomata stem 11, and the other end is equipped with second row stomata stem
12, the middle part of the sand core of water jacket 1 is equipped with third gas vent stem 13.It is described discarded logical that the sand core of water jacket 1 is equipped with accommodating
The sand core of road sand core 2 discards road 16, and the sand core, which is discarded, has gap between the inner wall and the discarded channel sand core 2 in road 16,
Specifically, the structure of channel sand core 2 is discarded as shown in figure 5, being designed with specific reference to the structure of sand core of water jacket 1.Such as Fig. 4 institute
Show, the sand core is discarded road 16 and be can be set from first row stomata stem 11 or the closer position of second row stomata stem 12.
The sand core of water jacket 1 includes multiple cylinder cap shaped holes 14, is formed between the two neighboring cylinder cap shaped hole 14 equipped with support column
Hole 15, it is preferable that be equipped with support column between any two neighboring cylinder cap shaped hole 14 and form hole 15, it can at
Support column is formed between two lids of arbitrary neighborhood of the cylinder cap of shape, enhances the structural strength of cylinder cap fire power face, as shown in Figure 1 i.e.
For the sand core assembly diagram of four-cylinder, it is equipped with support column between two neighboring cylinder cap shaped hole 14 and forms hole 15.
Engine cylinder cover casting mould provided by the invention, sand core assembly include discarded channel sand core 2, sand core of water jacket 1
Be equipped with and accommodate the sand core of the discarded channel sand core 2 and discard road 16, sand core discard road 16 inner wall and discarded channel sand core 2 it
Between there is gap, then gas extra in sand core of water jacket 1 or discarded channel sand core 2 can be discharged from the gap, can prevent gas
The defects of body is expelled directly out from sand core, can be improved or even be avoided the stomata of fluid origin engine cylinder cap surface, pinprick；And water
The middle part for covering sand core 1 is equipped with third gas vent stem 13, then the gas that sand core of water jacket 1 generates when being poured can be discharged from 3, makes
Exhaust is more smooth, the defects of can also improving or even avoid the stomata of fluid origin engine cylinder cap surface, pinprick；In addition,
It being equipped with support column between cylinder cap shaped hole 14 and forms hole 15, then the fire power face of fluid origin engine cylinder cover has support construction,
The intensity of cylinder cap fire power face is enhanced, can reduce or even avoid the deformation of cylinder cap fire power face.
Wherein, the diameter of the first row stomata stem 11 and the second row stomata stem 12 is all larger than equal to 18mm；
The diameter of the third gas vent stem 13 is more than or equal to 14mm.The effect of gas vent stem is to form gas vent, due to sand core
The architectural characteristic of itself, stem is easily broken off in sand core forming process, according to the specific structure of sand core, enables first row stomata core
The diameter that the diameter of column 11 and second row stomata stem 12 is all larger than equal to 18mm, third gas vent stem 13 is more than or equal to
14mm prevents its fracture to ensure against the forming of gas vent stem.
Further, there is the stomata being axially arranged along it on the third gas vent stem 13.Due to gas vent stem
13 length is longer, and the gas in stem and surrounding sand core is difficult to be discharged, and stem is more difficult to shape, and enables third gas vent stem 13
Equipped with along axial stomata, it is discharged convenient for the gas in stem and surrounding sand core, is conducive to the forming of third gas vent stem 13.
Preferably, stomata is set to the cental axial position of third gas vent stem 13.
It is preferably carried out in mode in one kind, as shown in fig. 6, the exhaust duct sand core 3 is symmetrical structure comprising two
Branch, and the exhaust duct sand core 3 surface carry out airflow design, specifically, exhaust duct sand core 3 be in " Y " font, two points
Branch is collected in exhaust ports.In this way, the exhaust duct of the cylinder cap cast out is also symmetrical structure, it is dry to can reduce the exhaust of two exhaust ducts
It disturbs.
It is preferably carried out in mode in another kind, as shown in fig. 7, the air intake duct sand core 4 is tangential including what is be arranged side by side
Air flue sand core 41 and helical intake sand core 42, and the direction of rotation of the tangential air flue sand core 41 and the helical intake sand core 42
Unanimously.In Fig. 7, A is considered as the partial cross section of cylinder, and B indicates the air inlet direction of rotation of tangential air flue, and C indicates helical intake
Direction of rotation, in this way, the air intake duct of the cylinder cap cast out is tangential and spiral combination intake, inlet air flow direction of rotation one
It causes, will not interfere with, and air inflow increases, and is formed simultaneously larger swirl ratio.
In a kind of specifically embodiment, as shown in figure 8, the steel mould substance includes bottom punching block 51 and is sequentially set to
Front end punching block 54, air inlet side punching block 52, rear end punching block 55 and exhaust side punching block 53 on 51 4 sides of the bottom punching block,
In, bottom punching block 51 is for fixing sand core assembly, i.e. sand core of water jacket 1, discarded channel sand core 2, exhaust duct sand core 3 and air intake duct sand
Core 4, the sand core assembly as shown in Figure 1 are fixed on the bottom punching block 51, the air inlet side punching block of 51 surrounding of bottom punching block
52, exhaust side punching block 53, front end punching block 54 and rear end punching block 55, are defined for the exterior contour to cylinder cap, total to sand core
After being fixed on the bottom punching block 51, molten aluminum (or other for shaping the metal liquid of cylinder cap) casting can be carried out, i.e.,
Form cylinder-cover blank.
Another embodiment of the present invention, according to the cylinder cap of above-mentioned die casting, as shown in figure 9, the both ends of the cylinder cap point
Not She You side gas vent, the middle part of the cylinder cap is equipped with upper air-vent, and one end of the cylinder cap is close to the position of the side gas vent
Discarded channel 61 is installed, the firepower surface side of the cylinder cap is equipped with many places support construction 62, and the support construction 62 is set to described
Between the two adjacent cylinder of cylinder cap.The middle part of the cylinder cap is equipped with upper air-vent, can improve or even avoid being formed when casting on surface
Stomata, pinprick the defects of；The firepower surface side of cylinder cap is equipped with many places support construction 62, enhances the intensity of cylinder cap fire power face, can
To reduce the deformation for even avoiding cylinder cap fire power face.
Further, the air intake duct of the cylinder cap includes tangential air flue and helical intake arranged side by side, and described tangential
Air flue is consistent with the direction of rotation of the helical intake, and the air intake duct of cylinder cap is tangential and spiral combination intake, inlet air flow rotation
It is consistent to turn direction, will not interfere with, and air inflow increases, and is formed simultaneously larger swirl ratio；The exhaust duct of the cylinder cap is symmetrical junction
Structure comprising Liang Ge branch, and the surface of the exhaust duct carries out airflow design, the exhaust duct of cylinder cap is symmetrical structure, can
To reduce the exhaust interference of two exhaust ducts.
Structure, feature and effect of the invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention does not limit the scope of implementation as shown in the drawings, it is all according to structure of the invention
Think made change or equivalent example modified to equivalent change, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (10)
1. a kind of engine cylinder cover casting mould, the steel mould substance including sand core assembly and with the sand core assembly Aided design,
The sand core assembly is fixed on the steel mould substance, it is characterised in that:
The sand core assembly includes sand core of water jacket (1), discards channel sand core (2), exhaust duct sand core (3) and air intake duct sand core (4),
The exhaust duct sand core (3) and the air intake duct sand core (4) are located at the two sides of the sand core of water jacket (1), described discarded logical
Road sand core (2) is set to the one end of the sand core of water jacket (1)；
One end of the sand core of water jacket (1) is equipped with first row stomata stem (11), and the other end is equipped with second row stomata stem (12),
The middle part of the sand core of water jacket (1) is equipped with third gas vent stem (13)；The sand core of water jacket (1), which is equipped with, accommodates described discard
The sand core of channel sand core (2) discards road (16), and the sand core is discarded between the inner wall in road (16) and the discarded channel sand core (2)
With gap；The sand core of water jacket (1) includes multiple cylinder cap shaped holes (14), between the two neighboring cylinder cap shaped hole (14)
Hole (15) are formed equipped with support column.
2. engine cylinder cover casting mould according to claim 1, it is characterised in that: the first row stomata stem (11)
It is all larger than with the diameter of the second row stomata stem (12) equal to 18mm.
3. engine cylinder cover casting mould according to claim 1, it is characterised in that: the third gas vent stem (13)
Diameter be more than or equal to 14mm.
4. engine cylinder cover casting mould according to claim 1 or 3, it is characterised in that: the third gas vent stem
(13) there is the stomata being axially arranged along it on.
5. engine cylinder cover casting mould according to claim 1, it is characterised in that: the exhaust duct sand core (3) is pair
Claim structure comprising Liang Ge branch, and the surface of the exhaust duct sand core (3) carries out airflow design.
6. engine cylinder cover casting mould according to claim 1, it is characterised in that: the air intake duct sand core (4) includes
Tangential air flue sand core (41) and helical intake sand core (42) arranged side by side, and the tangential air flue sand core (41) and the spiral
The direction of rotation of air flue sand core (42) is consistent.
7. engine cylinder cover casting mould according to claim 1, it is characterised in that: the steel mould substance includes bottom steel
Mould (51) and front end punching block (54), the air inlet side punching block (52), rear end steel being sequentially set on (51) four sides of the bottom punching block
Mould (55) and exhaust side punching block (53), the sand core assembly are fixed on the bottom punching block (51).
8. a kind of cylinder cap of die casting according to claim 1-7, it is characterised in that: the both ends of the cylinder cap
It is respectively equipped with side gas vent, the middle part of the cylinder cap is equipped with upper air-vent, and one end of the cylinder cap is close to the side gas vent
Position is equipped with discarded channel (61), and the firepower surface side of the cylinder cap is equipped with many places support construction (62), the support construction (62)
Between the two adjacent cylinder of the cylinder cap.
9. cylinder cap according to claim 8, it is characterised in that: the air intake duct of the cylinder cap includes tangential gas arranged side by side
Road and helical intake, and the tangential air flue is consistent with the direction of rotation of the helical intake.
10. cylinder cap according to claim 8, it is characterised in that: the exhaust duct of the cylinder cap is symmetrical structure comprising two
A branch, and airflow design is carried out to the inner wall of the exhaust duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810321235.9A CN108421956B (en) | 2018-04-11 | 2018-04-11 | Engine cylinder cover casting mould and cylinder cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810321235.9A CN108421956B (en) | 2018-04-11 | 2018-04-11 | Engine cylinder cover casting mould and cylinder cap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108421956A CN108421956A (en) | 2018-08-21 |
| CN108421956B true CN108421956B (en) | 2019-08-06 |
Family
ID=63160916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810321235.9A Active CN108421956B (en) | 2018-04-11 | 2018-04-11 | Engine cylinder cover casting mould and cylinder cap |
Country Status (1)
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| CN (1) | CN108421956B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19735012C1 (en) * | 1997-08-13 | 1998-09-03 | Daimler Benz Ag | Method for producing a cast cylinder head |
| JP2007132201A (en) * | 2005-11-08 | 2007-05-31 | Hino Motors Ltd | Cylinder head core |
| CN102114524A (en) * | 2010-12-28 | 2011-07-06 | 中国第一汽车集团公司 | Sand core exhaust method of complicated casting |
| CN202348460U (en) * | 2011-08-31 | 2012-07-25 | 长城汽车股份有限公司 | Sand-casting engine cylinder cover with low rejection ratio |
| CN103182477B (en) * | 2011-12-31 | 2015-07-08 | 上海爱仕达汽车零部件有限公司 | Die for casting engine cylinder cover |
| CN104707939B (en) * | 2015-04-08 | 2016-08-24 | 广西玉柴机器股份有限公司 | The casting sand core of diesel engine cylinder cover |
| CN106111912B (en) * | 2016-08-31 | 2018-08-21 | 广西玉柴机器股份有限公司 | Sand core group for casting integrated form Composite cylinder lid |
| CN207205189U (en) * | 2017-09-04 | 2018-04-10 | 安徽江淮汽车集团股份有限公司 | A kind of engine cylinder cover air flue core and engine cylinder cover die assembly |
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2018
- 2018-04-11 CN CN201810321235.9A patent/CN108421956B/en active Active
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| CN108421956A (en) | 2018-08-21 |
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