CN104338921B - Exhaust structure in the die casting of a kind of Ultra-Low Speed die casting front bearing cover of cam shaft - Google Patents
Exhaust structure in the die casting of a kind of Ultra-Low Speed die casting front bearing cover of cam shaft Download PDFInfo
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- CN104338921B CN104338921B CN201410660317.8A CN201410660317A CN104338921B CN 104338921 B CN104338921 B CN 104338921B CN 201410660317 A CN201410660317 A CN 201410660317A CN 104338921 B CN104338921 B CN 104338921B
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- die casting
- low speed
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- air flue
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
A kind of exhaust structure in the die casting of Ultra-Low Speed die casting front bearing cover of cam shaft, described die casting has tired gas region, inner surface in described tired gas region is provided with 8 font inserts, the top of described 8 font inserts is connected with 8 character mould jacking blocks, forming air flue gap of overflowing bottom described 8 font inserts and between adjacent molds surface, described excessive air flue gap is connected with the outer exhaust duct of mould.Exhaust structure in the die casting of the Ultra-Low Speed die casting front bearing cover of cam shaft of the present invention, the actual aluminium liquid flow direction in die cavity in being put into practice by consideration, and temperature change and the gas discharge impact on product when producing, structure design to mould is improved, the part of pit die cavity is carried out local flow improvement, thoroughly solve the air bound phenomenon in low speed die casting, improve product local quality, reduce scrappage.
Description
Technical field
The present invention relates to the exhaust structure of Ultra-Low Speed die casting, particularly relate to a kind of ultralow ram compression
Exhaust structure in the die casting of casting front bearing cover of cam shaft.
Background technology
The die casting of super thick aluminium alloy, shrinkage cavity and pore always perplex a difficult problem of industry.Use
The mode of low speed die casting decrease the turbulent flow in press casting procedure, reduce molten aluminium alloy parcel gas
Probability, extend evacuation time and flowing in cooling procedure, the contracting of super thick die casting can be solved
Hole problem, but owing to the flow rate of aluminium liquid of low speed die casting is less than high speed die casting, aluminium liquid in flowing for type
The impact on surface, chamber is the gentleest, and therefore dead angle part can accumulate some gases, and emphasis shows overall
The deep pit of shaping, then the surface of die casting just creates a new defect type air bound
(the aluminium liquid caused due to gas barrier separates), or the surface crater formed according to gas shape.
This portion gas is the most open on product, seldom appears in interiors of products, but meeting time serious
Product is formed obvious separator bar, if extending to interiors of products, also can reduce the intensity of product.
Surface air bound in die casting seldom occurs, during HTHP, surface gas is typically to be rushed
Brush is broken up and is rolled onto interiors of products, is being internally formed pore.The aluminium liquid of low speed die casting is due to pit die cavity
The resistance of middle gas, impulsive force own is the lowest, the endemism during therefore this air bound is low speed die casting.
Existing technology mainly has following two: one, offer air discharge duct on die joint, but due to mostly
The product thickness of number is relatively big, and when extrusion process uses Ultra-Low Speed, the gas in complex-shaped surface mould still cannot be very
Good get rid of, outward appearance and internal flaw is more, qualification rate is low when causing product to cast.Two, common insert
Exhaust, such exhaust structure shape is single, it is impossible to need the exhaust position matching of ad-hoc location,
Well to get rid of the gas of specified point, cause air bound defect.
In sum, in the urgent need to a kind of Ultra-Low Speed die casting front bearing cover of cam shaft in practical operation
Exhaust structure in die casting, carries out local flow improvement to the part of pit die cavity, thoroughly solves low speed
Air bound phenomenon in die casting, improves product local quality, reduces scrappage.
Summary of the invention
For solving above-mentioned technical problem, it is an object of the invention to provide a kind of for front bearing cover of cam shaft
On tired gas region design die casting in exhaust structure, targetedly design inner surface " 8 "
Word exhaust structure, thoroughly solves the air bound phenomenon in low speed die casting, pit type cavity segment carries out local
Structure is improved, and mode is flexible, can carry out normalization production and application.
For achieving the above object, technical scheme provided by the present invention is:
A kind of exhaust structure in the die casting of Ultra-Low Speed die casting front bearing cover of cam shaft, described die casting
Mould has tired gas region, and the inner surface in described tired gas region arranges 8 font inserts, described 8 words
The top of type insert is connected with 8 character mould jacking blocks, with adjacent molds surface bottom described 8 font inserts
Between formed overflow air flue gap, described excessive air flue gap is connected with the outer exhaust duct of mould.
Further, described excessive air flue gap is 0.04-0.07mm.
Further, described excessive air flue gap is 0.06mm.
Further, by the gas flow rate of the outer exhaust duct of described 8 font inserts more than point cast gate
Flow rate of aluminium liquid.
Using technique scheme, beneficial effects of the present invention has:
Repetition test the most of the present invention measures the blocking critical point of aluminium liquid exhaust duct, and utilizes insert products mould
Sign an undertaking component, form open passage with the external world, to discharge the gas of die cavity concave regions, in reducing
Portion's gas resistance to aluminium liquid filling die cavity, transforms mould structure, makes up because of product structure to pressure
The congenital defect that casting process brings, improves product quality and intensity.
2., because the product structure of front bearing cover of cam shaft is complicated, spill die cavity is relatively common, this mould
The optimization of structure can improve technology difficulty, improves product percent of pass and reduces production cost.
3. the exhaust structure in the die casting of the Ultra-Low Speed die casting front bearing cover of cam shaft of the present invention is logical
Cross the actual aluminium liquid flow direction in die cavity in consideration practice, and temperature change and gas discharge when producing
Impact on product, the structure design to mould is improved, and the part of pit die cavity is carried out office
Portion transforms, and thoroughly solves the air bound phenomenon in low speed die casting, improves product local quality, and minimizing is scrapped
Rate.
Accompanying drawing explanation
Fig. 1 is the schematic diagram in tired gas region in one embodiment of the present of invention；
Fig. 2 is the schematic diagram in tired gas region in an alternative embodiment of the invention；
Fig. 3 is the schematic diagram of air bound defect area in one embodiment of the present of invention；
Fig. 4 is to increase " 8 " word at defective locations in one embodiment of the present of invention to overflow the showing of depressed structure
It is intended to；
Fig. 5 is that in one embodiment of the present of invention, " 8 " word overflows the schematic diagram of depressed structure.
Description of reference numerals
1 mold jacking block, 2 " 8 " font inserts, 3 overflow air flue gap, 4 outer exhaust ducts, 5 fixed point row
Gas
Detailed description of the invention
As shown in Figure 1, 2, in the die casting of Ultra-Low Speed die casting front bearing cover of cam shaft, in figure
The region that circle is irised out is the pit type cavity configuration of mould, herein due to the flow rate of aluminium liquid of low speed die casting
Less than high speed die casting, the impact for mold cavity surface in flowing of aluminium liquid is the gentleest, dead angle part meeting
Accumulating some gases, owing to the flowing of aluminium liquid can make die casting form air bound, such region is referred to as tired
Gas region.Fig. 3 show the aluminium liquid caused by gas barrier and separates the air bound defect caused.
As shown in Figure 4,5, exhaust duct is blocked because the aluminium water capacity easily creeps into exhaust duct, therefore mould type
Arranging the difficult point of exhaust always Die Casting Industry on chamber, the present invention, through repeatedly testing, measures aluminium liquid row
The blocking critical point of air flue.As shown in Figure 4, increase " 8 " word at defective locations to overflow depressed structure.?
The inner surface in tired gas region arranges " 8 " font insert 2, the top of " 8 " font insert 2 and " 8 "
Character mould jacking block 1 is connected, and the connected mode of insert can be bolt fastening, hanging platform pressing plate, close-fitting edge
Embedding, this is not restricted.The air flue that overflows is formed bottom described 8 font inserts and between adjacent molds surface
Gap 3, described excessive air flue gap is connected with the outer exhaust duct 4 of mould, it is achieved determining of mold jacking block
Point exhaust 5.Excessive air flue gap is set to 0.04-0.07mm, in the present embodiment, between this excessive air flue
Gap is 0.06mm.
So, utilize and " 8 " font insert 2 should form open channel with the external world, in tired gas region
Gas can be discharged by excessive air flue gap 3, and aluminium liquid will not be discharged.Between again due to this excessive air flue
Gap is connected with the outer exhaust duct 4 of mould, it is possible to effectively gas is discharged to outside.
Utilize the die casting step of die casting of the Ultra-Low Speed die casting front bearing cover of cam shaft of the present invention such as
Under:
(1) dispensing: the percentage by weight of aluminum alloy materials component is: the silicon of 8%；The magnesium of 0.05%；
The iron of 1.3%；The copper of 2.0%；The manganese of 0.55%；The nickel of 0.55%；The zinc of 1.2%；The lead of 0.35%；
The tin of 0.25%；The titanium of 0.25%；The chromium of 0.15%, surplus is aluminium.
(2) melting: mould local cooling when melting starts, smelting temperature is set as 710 DEG C, adds
The refining deterioration agent of 0.2%, adds with during getter degasification；Water cooling when mould local cooling uses,
Hydraulic pressure control is at 4MPa, and die temperance control is at 140 DEG C, and hole temperature of loosing core controls at 260 DEG C.
(3) argon gas that degasification uses purity to be 99.99% carries out degasification operation 3 minutes, qualified rear quiet
Only within 8 minutes, prepare die casting；
(4) die cast: main running channel flow rate of aluminium liquid=2 meter per second；Divide cast gate flow rate of aluminium liquid=5 meter per second；
" 8 " word insert exhaust duct gas flow rate ＞ 5 meter per second, aging temp is 225 DEG C, is incubated 10 hours.
Embodiment described above only have expressed embodiments of the present invention, and it describes more concrete and detailed
Carefully, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, it is right
For those of ordinary skill in the art, without departing from the inventive concept of the premise, it is also possible to do
Going out some deformation and improvement, these broadly fall into protection scope of the present invention.
Claims (3)
1. the exhaust structure in the die casting of Ultra-Low Speed die casting front bearing cover of cam shaft, described pressure
Casting mould has tired gas region, it is characterised in that the inner surface in described tired gas region arranges 8 fonts
Insert, the top of described 8 font inserts is connected with 8 character mould jacking blocks, bottom described 8 font inserts
And form the outer exhaust duct of overflow air flue gap, described excessive air flue gap and mould between adjacent molds surface
It is connected, by the gas flow rate of the outer exhaust duct of described 8 font inserts more than the aluminium liquid flow dividing cast gate
Speed.
Exhaust structure in die casting the most according to claim 1, it is characterised in that described
Excessive air flue gap is 0.04-0.07mm.
Exhaust structure in die casting the most according to claim 2, it is characterised in that described
Excessive air flue gap is 0.06mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410660317.8A CN104338921B (en) | 2014-11-18 | 2014-11-18 | Exhaust structure in the die casting of a kind of Ultra-Low Speed die casting front bearing cover of cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410660317.8A CN104338921B (en) | 2014-11-18 | 2014-11-18 | Exhaust structure in the die casting of a kind of Ultra-Low Speed die casting front bearing cover of cam shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104338921A CN104338921A (en) | 2015-02-11 |
| CN104338921B true CN104338921B (en) | 2016-08-31 |
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| CN201410660317.8A Active CN104338921B (en) | 2014-11-18 | 2014-11-18 | Exhaust structure in the die casting of a kind of Ultra-Low Speed die casting front bearing cover of cam shaft |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396389A (en) * | 2018-12-30 | 2019-03-01 | 博众优浦(常熟)汽车部件科技有限公司 | A kind of bilateral charging casting die for camshaft the cover |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101209490A (en) * | 2006-12-29 | 2008-07-02 | 富准精密工业(深圳)有限公司 | Die casting die for shaping cooling component and method for manufacturing cooling component by the same |
| CN201179557Y (en) * | 2008-04-16 | 2009-01-14 | 广州市型腔模具制造有限公司 | Air discharge mechanism of mould |
| KR20090058838A (en) * | 2007-12-05 | 2009-06-10 | 현대자동차주식회사 | Oil jacket core of cylinder head mold for lower casting |
| CN101791685A (en) * | 2009-12-23 | 2010-08-04 | 常州市蓝托金属制品有限公司 | Die casting mould special for ultrathin-wall non-leakage aviation aluminium alloy element |
| CN202224629U (en) * | 2011-08-17 | 2012-05-23 | 华孚精密金属科技(常熟)有限公司 | Sliding block structure for pressure casting die |
| CN203764930U (en) * | 2013-12-10 | 2014-08-13 | 福州冠锋模具技术有限公司 | Annular overflow drainage system of die-casting mould |
| CN204220963U (en) * | 2014-11-18 | 2015-03-25 | 太仓海嘉车辆配件有限公司 | Exhaust structure in a kind of die casting of Ultra-Low Speed die casting front bearing cover of cam shaft |
-
2014
- 2014-11-18 CN CN201410660317.8A patent/CN104338921B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101209490A (en) * | 2006-12-29 | 2008-07-02 | 富准精密工业(深圳)有限公司 | Die casting die for shaping cooling component and method for manufacturing cooling component by the same |
| KR20090058838A (en) * | 2007-12-05 | 2009-06-10 | 현대자동차주식회사 | Oil jacket core of cylinder head mold for lower casting |
| CN201179557Y (en) * | 2008-04-16 | 2009-01-14 | 广州市型腔模具制造有限公司 | Air discharge mechanism of mould |
| CN101791685A (en) * | 2009-12-23 | 2010-08-04 | 常州市蓝托金属制品有限公司 | Die casting mould special for ultrathin-wall non-leakage aviation aluminium alloy element |
| CN202224629U (en) * | 2011-08-17 | 2012-05-23 | 华孚精密金属科技(常熟)有限公司 | Sliding block structure for pressure casting die |
| CN203764930U (en) * | 2013-12-10 | 2014-08-13 | 福州冠锋模具技术有限公司 | Annular overflow drainage system of die-casting mould |
| CN204220963U (en) * | 2014-11-18 | 2015-03-25 | 太仓海嘉车辆配件有限公司 | Exhaust structure in a kind of die casting of Ultra-Low Speed die casting front bearing cover of cam shaft |
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| CN104338921A (en) | 2015-02-11 |
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Effective date of registration: 20160718 Address after: Liuhe Xinzha village in Taicang city Suzhou city Jiangsu province 215431 Applicant after: Suzhou Meikekasi Automobile Technology Co., Ltd. Address before: 215431 Jiangsu city of Suzhou province Taicang City Liuhe Town, Zhujianglu Road No. 55 Applicant before: Taicang Haijia Vehicle Fittings Co., Ltd. |
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