CN107470580A - Die casting and pressure casting method - Google Patents
Die casting and pressure casting method Download PDFInfo
- Publication number
- CN107470580A CN107470580A CN201710725124.XA CN201710725124A CN107470580A CN 107470580 A CN107470580 A CN 107470580A CN 201710725124 A CN201710725124 A CN 201710725124A CN 107470580 A CN107470580 A CN 107470580A
- Authority
- CN
- China
- Prior art keywords
- cavity
- ingate
- die casting
- die
- die cavity
- 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
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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
- B22D17/2272—Sprue channels
-
- 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
Abstract
The embodiment of the invention discloses a kind of die casting and pressure casting method, die casting includes fixed half and moving half, the cover half and the dynamic model fasten to form a die cavity, first side of the cavity of the die cavity has side ingate, second side of the cavity has exhaust outlet, first side and the relative both sides that second side is the cavity；The cavity also has auxiliary ingate, and the auxiliary ingate is on the cavity between first side and the second side.The die casting of the embodiment of the present invention can reduce the generation of the defects of die casting filling badness, shrinkage depression, cold joint line, bag gas, and effectively reduce the erosion to mould, can provide effective dwell pressure for local thicker die casting, effectively prevent shrinkage depression.
Description
Technical field
The present invention relates to technical field of material formation, more particularly to a kind of die casting and pressure casting method.
Background technology
As the rapid development and user of electronic product are to the demand of lightening electronic product, metal foil wall pieces be also to
The direction for more and more thinner is developed, and compression molding process has tended to be ripe at present, but (thickness is approximately less than for ultra-thin
Production 0.6mm) still suffers from many deficiencies；Because ultrathin products are when carrying out die casting, molten metal can be in very short time
Cooling；If die cavity filling is not full before molten metal solidification, crackle, shrinkage depression, cold joint line, bag gas etc. can be caused to molding part
Harmful effect；If in order to make molten metal to be caused to rush to mould full of die cavity and simple raising injection speed in a short time
The infringement such as erosion and burning corruption, therefore how rational allocation is done to the area of mould ingate and position arrangement, it is to solve ultra-thin part pressure
Basic, and the technological difficulties of those skilled in the art of casting process defect.
The content of the invention
In view of the above-mentioned problems in the prior art, the embodiment of the present invention provides a kind of ingate arrangement rationally, energy
Enough meet die casting and pressure casting method prepared by ultra-thin die casting.
To solve the above problems, technical scheme provided in an embodiment of the present invention is：
A kind of die casting, including fixed half and moving half, the cover half and the dynamic model fasten to form a die cavity,
First side of the cavity of the die cavity has a side ingate, and the second side of the cavity has an exhaust outlet, and described
Side and the relative both sides that second side is the cavity；
The cavity also has auxiliary ingate, chamber of the auxiliary ingate between first side and the second side
On body.
Preferably, the side ingate is arranged on the cover half, the dynamic model is provided with runner.
Preferably, distance of the auxiliary ingate apart from first side is H1, the auxiliary ingate is apart from institute
The distance for stating the second side is H2；Wherein, 1/3 ＜ H1/H2 ＜ 1/2.
Preferably, the die cavity is rectangle structure, first side and second side are respectively positioned on the die cavity
Long side.
Preferably, first side is provided with multiple side ingates.
Preferably, the runner of the die casting is by the middle part of close first side, both sides extend to the left and right, and with
Multiple side ingates and auxiliary ingate connection.
Preferably, the housing width at two short sides of the die cavity is more than the width of the other parts of the die cavity.
Preferably, the width of the other parts of the die cavity is 0.3-0.6mm.
Preferably, multiple exhaust outlets are uniformly provided with second side.
A kind of pressure casting method, it is included in spraying lubricant in the die cavity of die casting, is then shut off the die casting,
Molten metal is injected in the die cavity by side ingate and auxiliary ingate with high pressure, and keeps the metal in pressure to die cavity
Liquid solidifies.
Compared with prior art, the beneficial effect of the embodiment of the present invention is：
The die casting of the embodiment of the present invention can reduce the defects of die casting filling badness, shrinkage depression, cold joint line, bag gas
Occur, and effectively reduce the erosion to mould, can provide effective dwell pressure for local thicker die casting, effectively prevent
Shrinkage depression.
Brief description of the drawings
Fig. 1 is the structural representation of the die casting of the embodiment of the present invention；
Fig. 2 is the structural representation of the die casting of the embodiment of the present invention；
Fig. 3 is filling view of the metallic solution in 0.0056s in the die cavity of the embodiment of the present invention；
Fig. 4 is filling view of the metallic solution in 0.0059s in the die cavity of the embodiment of the present invention；
Fig. 5 is filling view of the metallic solution in 0.0063S in the die cavity of the embodiment of the present invention；
Fig. 6 is filling view of the metallic solution in 0.0073S in the die cavity of the embodiment of the present invention.
Reference：
1- die cavitys；11- sides ingate；12- aids in ingate；2- runners；3- exhaust outlets.
Embodiment
To make those skilled in the art be better understood from the technical scheme of the embodiment of the present invention, below in conjunction with the accompanying drawings and specifically
Embodiment elaborates to the present invention.
The embodiments of the invention provide a kind of die casting, including fixed half and moving half, cover half is provided with cast gate, is set on dynamic model
There is runner 2；Specifically, as shown in figure 1, cover half and dynamic model fasten to form a die cavity 1, the first side of the cavity of die cavity 1 has side
Ingate 11, the second side of cavity have exhaust outlet 3, the first side and the relative both sides that the second side is cavity；Cavity also has
Ingate 12 is aided in, auxiliary ingate 12 is on the cavity between the first side and the second side.
Further, as shown in figure 1, die cavity 1 is rectangle structure, the first side and the second side are respectively positioned on the long side of die cavity 1,
The Aspect Ratio of die cavity 1 is 3:1, the first side is provided with multiple side ingates 11, the distance of auxiliary ingate 12 the first side of distance
For H1, the distance of auxiliary ingate 12 the second side of distance is H2；Wherein, 1/3 ＜ H1/H2 ＜ 1/2.
Further, the runner 2 of die casting by close to the first side middle part to the left and right both sides extend, and with multiple sides
Cast gate 11 and auxiliary ingate 12 connect.Housing width at two short sides of die cavity 1 is (between i.e. after cover half and dynamic model fastening
Gap) be more than die cavity 1 other parts width.
The embodiment of the present invention is explained in detail by taking specific product as an example below (if nothing illustrates, following side ingates
11 and auxiliary ingate 12 be referred to as ingate)；
As shown in Fig. 2 die casting provided in an embodiment of the present invention is by die cast in the die cavity of die casting, further
, the product size of die casting is：It is long：290mm；It is wide：97mm；Its middle part thickness A is 0.5mm；The local thickness B of left and right ends
For 1.9mm.The die cavity 1 of corresponding die casting of the embodiment of the present invention matches with pressur casting size, i.e. the size of die cavity 1 is：
It is long：290mm；It is wide：97mm；Its middle part thickness A is 0.5mm；The local thickness B of left and right ends is 1.9mm.
Further, second side is provided with multiple exhaust outlets 3, in the present embodiment, multiple exhaust outlets 3
It is uniformly arranged on second side.
Further, for the die casting：
1st, its theoretical loading time t；
By t=cT2；(t represents loading time；C represents metal empirical coefficient；T represents die casting thickness)；Wherein, magnesium closes
The empirical coefficient c=0.006 of gold；The empirical coefficient c=0.01 of aluminium alloy；Therefore draw, die casting thickness is pressed for 0.3-0.6mm
The time of filling needed for casting, wherein, the loading time needed for magnesium alloy is 0.54ms-2.16ms, the filling needed for aluminium alloy
Time is 0.9ms-3.6ms.
2nd, ingate gross area Ag
By Ag=W/ (ρ * Vg*t)；(W represents the weight by ingate molten metal；ρ represents molten metal proportion；Vg is represented
Molten metal passes through gate velocity；T represents time of the molten metal by ingate).
3rd, ingate total length L g
Lg=Ag/T；
Wherein, otherwise the arrangement of ingate can cause disorder, bag gas, fill typically no more than the side total length 2/3
Fill out the defects of bad, and filling velocity is generally 80-100m/s, therefore when to draw die casting thickness be 0.3-0.6mm, ingate
Theoretical gross area Ag is 129.3-161.7mm2, therefore the theoretical total length of ingate is 258.6-323.4mm, its theoretical length is
Through the side total length more than 290*2/3=193.3mm, therefore, made up beyond part by auxiliary ingate 12.
Therefore, the area Ac of auxiliary ingate 12 is：Ac=(Lg-L*m) T；(L represents being somebody's turn to do for the place of auxiliary ingate 12
The total length of side；M represents empirical value, generally less than 2/3)；
In addition, the embodiment of the present invention is also verified to the filling velocity Vp of ingate
Vp=Ag*Vg/Ap；(Ap represents piston area)
Mould limitation velocity Vd
Vd=C* (2g*Fi*Ag2/ρ*Ap3)1/2；(C represents coefficient, and general die casting material takes 0.4 when being magnesium；Fi=
Pp*Ap, wherein, Pp represents piston output pressure, and Ap represents piston area)；Vp ＜ Vd are finally drawn, thus it is qualified.
In addition, the also internal gate location of the embodiment of the present invention has carried out many experiments analysis：
As shown in Figures 3 to 6, represented successively by left-to-right wherein in figure, runner one：Auxiliary ingate 12, runner are not set
Two：Ingate position H1/H2=1/3, runner three：Ingate position H1/H2=1/2, ingate position H1/H2=1/1.
By mold flow analysis as can be seen that runner four can produce bag gas, positive cold burden is not easy to discharge, runner two and three
Filling effect it is relatively good, relative cylinder charge is more synchronous；To sum up, the position of ingate 12 is aided in meet：During 1/3 ＜ H1/H2 ＜ 1/2,
Filling effect is preferable.Meanwhile aid in ingate 12 to provide good dwell pressure directly to B areas, so as to avoid shrinkage depression
The defects of generation.
In addition, the embodiment of the present invention additionally provides a kind of pressure casting method, it is included in spraying lubrication in the die cavity 1 of mould
Agent, mould is then shut off, is injected molten metal in die cavity 1 with high pressure, and keep the metal freezing in pressure to die cavity 1.
Above example is only the exemplary embodiment of the present invention, is not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can make respectively in the essence and protection domain of the present invention to the present invention
Kind modification or equivalent substitution, this modification or equivalent substitution also should be regarded as being within the scope of the present invention.
Claims (10)
1. a kind of die casting, including fixed half and moving half, the cover half and the dynamic model fasten to form a die cavity, its feature exists
In,
First side of the cavity of the die cavity has side ingate, and the second side of the cavity has exhaust outlet, first side
With the relative both sides that second side is the cavity；
The cavity also has auxiliary ingate, cavity of the auxiliary ingate between first side and the second side
On.
2. die casting according to claim 1, it is characterised in that the side ingate is arranged on the cover half, institute
State dynamic model and be provided with runner.
3. die casting according to claim 1, it is characterised in that it is described auxiliary ingate apart from first side away from
From for H1, distance of the auxiliary ingate apart from second side is H2；Wherein, 1/3 ＜ H1/H2 ＜ 1/2.
4. die casting according to claim 1, it is characterised in that the die cavity is rectangle structure, first side
And second side is respectively positioned on the long side of the die cavity.
5. die casting according to any one of claim 1 to 4, it is characterised in that first side is provided with multiple
The side ingate.
6. die casting according to claim 5, it is characterised in that the runner of the die casting is by close to described first
Both sides extend to the left and right at the middle part of side, and are connected with multiple side ingates and auxiliary ingate.
7. die casting according to claim 4, it is characterised in that the housing width at two short sides of the die cavity is more than
The width of the other parts of the die cavity.
8. die casting according to claim 7, it is characterised in that the width of the other parts of the die cavity is 0.3-
0.6mm。
9. die casting according to claim 1, it is characterised in that multiple exhausts are uniformly provided with second side
Mouthful.
10. a kind of pressure casting method, it is characterised in that be included in spraying lubricant in the die cavity of die casting, be then shut off described
Die casting, molten metal is injected in the die cavity by side ingate and auxiliary ingate with high pressure, and keep pressure to mould
The molten metal solidification of intracavitary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710725124.XA CN107470580B (en) | 2017-08-22 | 2017-08-22 | Die casting and pressure casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710725124.XA CN107470580B (en) | 2017-08-22 | 2017-08-22 | Die casting and pressure casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107470580A true CN107470580A (en) | 2017-12-15 |
| CN107470580B CN107470580B (en) | 2019-09-13 |
Family
ID=60601981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710725124.XA Active CN107470580B (en) | 2017-08-22 | 2017-08-22 | Die casting and pressure casting method |
Country Status (1)
| Country | Link |
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| CN (1) | CN107470580B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002045956A (en) * | 2000-05-22 | 2002-02-12 | Hitachi Ltd | Electronic equipment housing and its manufacturing method |
| JP2008183591A (en) * | 2007-01-30 | 2008-08-14 | Toshiba Corp | Method for producing casting and die-casting die |
| US20090194249A1 (en) * | 2008-01-31 | 2009-08-06 | Kabushiki Kaisha Toshiba | Die and Method of Manufacturing Cast Product |
| CN101518817A (en) * | 2008-02-29 | 2009-09-02 | 株式会社东芝 | Die for die casting and method of manufacturing cast product |
| WO2009113370A1 (en) * | 2008-03-12 | 2009-09-17 | 本田技研工業株式会社 | Multiple-cavity mold |
| CN203156010U (en) * | 2013-04-09 | 2013-08-28 | 丹阳荣嘉精密机械有限公司 | Lamp cover die-casting mould |
| US20140158317A1 (en) * | 2012-10-17 | 2014-06-12 | Microsoft Corporation | Metal Alloy Injection Molding |
| CN104275457A (en) * | 2013-07-04 | 2015-01-14 | 上海乾通汽车附件有限公司 | Die casting system for solenoid valve body |
| CN204122722U (en) * | 2014-07-31 | 2015-01-28 | 上海乾通汽车附件有限公司 | The die-casting system of dry dual clutch flow valve body |
| DE102015006427A1 (en) * | 2015-05-19 | 2016-11-24 | Audi Ag | Die casting mold with improved mold filling properties for the production of metallic die cast components |
| CN106694846A (en) * | 2016-12-27 | 2017-05-24 | 高州市金松铸造有限公司 | Multi-pouring-gate die-casting die |
-
2017
- 2017-08-22 CN CN201710725124.XA patent/CN107470580B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002045956A (en) * | 2000-05-22 | 2002-02-12 | Hitachi Ltd | Electronic equipment housing and its manufacturing method |
| JP2008183591A (en) * | 2007-01-30 | 2008-08-14 | Toshiba Corp | Method for producing casting and die-casting die |
| US20090194249A1 (en) * | 2008-01-31 | 2009-08-06 | Kabushiki Kaisha Toshiba | Die and Method of Manufacturing Cast Product |
| CN101518817A (en) * | 2008-02-29 | 2009-09-02 | 株式会社东芝 | Die for die casting and method of manufacturing cast product |
| WO2009113370A1 (en) * | 2008-03-12 | 2009-09-17 | 本田技研工業株式会社 | Multiple-cavity mold |
| US20140158317A1 (en) * | 2012-10-17 | 2014-06-12 | Microsoft Corporation | Metal Alloy Injection Molding |
| CN203156010U (en) * | 2013-04-09 | 2013-08-28 | 丹阳荣嘉精密机械有限公司 | Lamp cover die-casting mould |
| CN104275457A (en) * | 2013-07-04 | 2015-01-14 | 上海乾通汽车附件有限公司 | Die casting system for solenoid valve body |
| CN204122722U (en) * | 2014-07-31 | 2015-01-28 | 上海乾通汽车附件有限公司 | The die-casting system of dry dual clutch flow valve body |
| DE102015006427A1 (en) * | 2015-05-19 | 2016-11-24 | Audi Ag | Die casting mold with improved mold filling properties for the production of metallic die cast components |
| CN106694846A (en) * | 2016-12-27 | 2017-05-24 | 高州市金松铸造有限公司 | Multi-pouring-gate die-casting die |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107470580B (en) | 2019-09-13 |
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Effective date of registration: 20210107 Address after: 601-g6-1, 6th floor, building 2, No. 6, Shangdi West Road, Haidian District, Beijing 100085 Patentee after: Lenovo Kaitian Technology Co., Ltd Address before: 230601 418, 4 building, Hai Heng mansion 6, Cui Wei Road, Hefei economic and Technological Development Zone, Anhui Patentee before: HEFEI LCFC INFORMATION TECHNOLOGY Co.,Ltd. |