CN106694848A - Pressure casting device and method - Google Patents
Pressure casting device and method Download PDFInfo
- Publication number
- CN106694848A CN106694848A CN201710056626.8A CN201710056626A CN106694848A CN 106694848 A CN106694848 A CN 106694848A CN 201710056626 A CN201710056626 A CN 201710056626A CN 106694848 A CN106694848 A CN 106694848A
- Authority
- CN
- China
- Prior art keywords
- mould
- die
- exhaust
- die holder
- exhaust passage
- 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.)
- Pending
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Classifications
-
- 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
-
- 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
- B22D17/14—Machines with evacuated die cavity
- B22D17/145—Venting means therefor
Abstract
The invention discloses a pressure casting device which comprises a mould, a gas exhaust structure arranged in the mould and a vacuum pump arranged on the outer part of the mould; the mould comprises a first mould base, a second mould base as well as a mould cavity and a pouring gate defined by the first mould base and the second mould base when the first mould base and the second mould base are closed; through the pouring gate, the mould cavity communicates with the outer part of the mould; the gas exhaust structure comprises a first gas exhaust plate arranged on the first mould base, a second gas exhaust plate arranged on the second mould base and a gas exhaust channel defined by the first gas exhaust plate and the second gas exhaust plate when the first mould base and the second mould base are closed; and a first end of the gas exhaust channel communicates with the mould cavity in the mould, and a second end opposite to the first end is connected with a vacuum pump through a connecting tube. The pressure casting device disclosed by the invention quickly exhausts air in the mould cavity through the gas exhaust structure, not only can reduce porosity of pressure castings, also increases a mould filling rate, and ensures a relatively high yield and relatively high production efficiency. The invention also discloses a pressure casting method.
Description
Technical field
The present invention relates to die-casting technique field, more particularly to a kind of die casting equipment and method.
Background technology
Shrinkage cavity and stomata are most common defects in die casting, have a strong impact on the quality of die casting.Traditional high speed die casting
Production efficiency is higher, but porosity is also higher, is generally capable of up to 5% or so.Although and low speed extrusion process can be
Reduce porosity to a certain extent, but the single products die casting time is more long, production efficiency is relatively low, the finished product of production in enormous quantities compared with
It is high.
Therefore, being badly in need of exploitation one kind can reduce porosity, and the die casting equipment and method of energy improve production efficiency.
The content of the invention
In order to overcome the defect in the presence of prior art, the present invention to provide one kind and quickly exclude die cavity by exhaust structure
The die casting equipment and method of interior air, the mechanism and method can not only reduce the porosity of die casting, further improves
Fill type speed, it is ensured that yield rate and production efficiency higher.
According to a kind of die casting equipment of the invention, including mould, the exhaust structure that is arranged in mould and it is arranged at mould
Vavuum pump outside tool, wherein,
Mould is comprising the first die holder, the second die holder and when the first die holder and the second die holder are closed by the first die holder and the
The outside of die cavity and cast gate that two die holders are limited, cast gate connection die cavity and mould；
Exhaust structure includes the first exhaust plate being arranged on the first die holder, the second exhaust plate being arranged on the second die holder
And the exhaust passage limited by first exhaust plate and second exhaust plate when the first die holder and the second die holder are closed；
The first end of exhaust passage is connected with the die cavity in mould, second end relative with first end by connecting tube with it is true
Empty pump connection.
Further, die casting equipment also include be arranged on the first die holder or the second die holder at least one knock pin, top
Go out pin connection exhaust passage and be arranged at the ejecting device of mold exterior.
Further, die casting equipment also includes hygrosensor, and hygrosensor is arranged at first exhaust plate or second row
Gas plate is near the side of vavuum pump.
Further, extension track of the exhaust passage from first end to the second end is in fold-line-shaped.
Further, the broken line angle of exhaust passage is 30 °.
Further, when the first die holder and the second die holder are closed, the distance between first exhaust plate and second exhaust plate
It is gradually reduced by first end to second end of exhaust passage.
Further, cross-sectional area of the exhaust passage at first end and the cross-sectional area ratio of cast gate are 1：15.
According to a kind of pressure casting method of the invention, comprise the steps of：
Step 1：From cast gate to being pressed into liquid metal in mould；
Step 2：Vavuum pump is opened to extract the air in die cavity out by exhaust passage；
Step 3：After air is pumped, liquid metal is into exhaust passage and is frozen into solid metallic, and vavuum pump is closed；
Step 4：After liquid metal in die cavity solidifies completely, die casting is taken out in die sinking；
Step 5：Start ejecting device and promote knock pin, removal is attached to the metal on first exhaust plate or second exhaust plate
Residue.
Further, step 3 also includes：
Step 3a：When liquid metal is into exhaust passage and when being frozen into solid metallic, solid metallic blocks exhaust passage,
Vavuum pump is closed；
Step 3b：When still keeping liquid when liquid metal reaches exhaust passage adjacent to the position at the second end, temperature sensing
Device detects environment temperature higher than temperature threshold and sends alarm, and vavuum pump is closed..
Due to being used in upper technical scheme, the present invention has the following advantages that compared with prior art：
1. die casting equipment of the invention quickly excludes air in die cavity by being connected to the exhaust structure of vavuum pump, not only
Shrinkage cavity and stomatal limiting value probability are reduced, also speeded up liquid metal fills type speed, effectively reduces porosity and improves life
Produce efficiency.
2. the exhaust passage being arranged in the present invention in mould extends along fold-line-shaped track, extends the flowing of liquid metal
Path, promotes liquid metal solidification.
3. the spacing between the first exhaust plate in mould and second exhaust plate is arranged in the present invention along flow of liquid metal
Dynamic path is gradually reduced, and further promotes liquid metal solidification.
4. the present invention sets hygrosensor in the side of neighbouring vavuum pump, reminds and closes vavuum pump in time, is prevented effectively from
Adverse consequences caused by not solidified because of liquid metal.
5. die casting equipment of the invention sets knock pin on mould, and easy cleaning is attached to first exhaust plate or second row
Metallic residue on gas plate.
Brief description of the drawings
Fig. 1 is the schematic diagram according to die casting equipment of the invention；
Fig. 2 is the schematic diagram of the exhaust passage in the die casting equipment shown in Fig. 1；
Fig. 3 is the flow chart according to pressure casting method of the invention.
Description of reference numerals：
100 moulds, 110 first die holders, 120 second die holders, 130 die cavities, 140 cast gates, 200 exhaust structures, 210 first rows
Gas plate, 220 second exhaust plates, 230 exhaust passages, 231 first ends, 232 second ends, 300 vavuum pumps, 400 connecting tubes, 500 tops
Go out pin, 510 ejecting devices, 600 hygrosensors.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiment, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is only used for explaining the present invention, limit is not used to
The fixed present invention.
Fig. 1 is the schematic diagram according to die casting equipment of the invention.As illustrated, die casting equipment generally includes mould 100, row
Depressed structure 200 and vavuum pump 300.Wherein, mould 100 is comprising the first die holder 110, the second die holder 120 and when the first die holder
110 and the second die holder 120 die cavity 130 and cast gate 140 for being limited by the first die holder 110 and the second die holder 120 when closing.Die cavity
130 can be fabricated to any shape according to real needs, and cast gate 140 then connects the outside of die cavity 130 and mould 100, for
Liquid metal is poured into die cavity 130.
Exhaust structure 200 is arranged at the inside of mould 100, for deriving the air in die cavity 130.Such as Fig. 1 and Fig. 2 institutes
Show, exhaust structure 200 includes the first exhaust plate 210 being arranged on the first die holder 110, be arranged on the second die holder 120 the
Two exhaustion plates 220, and when the first die holder 110 and the second die holder 120 are closed by first exhaust plate 210 and second exhaust plate
220 exhaust passages 230 for limiting.Wherein, the first end 231 of exhaust passage 230 is connected with the die cavity 130 in mould 100, and
Second end 232 relative with first end 231 is connected by connecting tube 400 with the vavuum pump 300 being arranged at outside mould 100.
In press casting procedure, when liquid metal starts to be flowed into die cavity 130 by cast gate 140, vavuum pump 300 can be started, by exhaust
Passage 230 extracts the air in die cavity 130, to avoid the formation of stomata or shrinkage cavity, and accelerates the fill rate of liquid metal.It is excellent
Selection of land, when the ratio between the cross-sectional area of cross-sectional area of the exhaust passage 230 at first end 231 and cast gate 140 is 1：When 15, exhaust
The pumping effect of passage 230 is optimal.
In an embodiment of the present invention, can be by exhaust passage 230 from the extension track at the end of first end 231 to the second 232
Fold-line-shaped is designed to, the length of exhaust passage 230 is effectively extended.The fold-line-shaped extends track and extends in exhaust passage 230
The flow path of fluid, is conducive to fluid that temperature is gradually reduced in flow process.The extension track of one side fold-line-shaped avoids
The air of extraction influences service life of vacuum pump because temperature is too high；On the other hand after the air in die cavity is drained only, part
Liquid metal flows to second segment 232 into exhaust passage 230 and from first end 231, and the extension track of fold-line-shaped is conducive to liquid
Metal rapid solidification in exhaust passage 230, it is to avoid the flow of liquid metal of high temperature goes out mould 100.Experiment shows, by exhaust passage
230 broken line included angle A is arranged to 30 ° of best results.
It is further preferred that when the first die holder 110 and the second die holder 120 are closed, first exhaust plate 210 and second
The distance between exhaustion plate 220 B --- i.e. the height B of exhaust passage 230 --- can be arranged to by the first of exhaust passage 230
The 231 to the second end 232 of end is gradually smaller, to further speed up the reduction of fluid temperature (F.T.) in exhaust passage 230.
The top being arranged on the first die holder 110 and/or the second die holder 120 can also be included according to die casting equipment of the invention
Go out pin 500.The one end of knock pin 500 connects exhaust passage 230, and the other end is connected in the ejecting device outside mould 100
510, for removing the metallic residue being attached on first exhaust plate 210 and/or second exhaust plate 220 after die casting terminates.To the greatest extent
Pipe Fig. 1 illustrate only the knock pin 500 and corresponding ejecting device 510 being arranged on the first die holder 110, this area skill
Art personnel can be according to actual conditions such as the length of exhaust passage 230 in the first die holder 110 and/or the difference of the second die holder 120
Position sets multiple knock pins 500 and corresponding ejecting device 510, to reach more preferable elimination effect.
It is further preferred that can also include being arranged at first exhaust plate 210 or the second according to die casting equipment of the invention
Exhaustion plate 220 is close to the hygrosensor 600 of the side of vavuum pump 300, to detect the mould 100 close to vavuum pump 300 in time
Temperature, and temperature be higher than certain threshold value when send alarm and close vavuum pump 300.The setting of hygrosensor 600 can be with
Further avoid the flow of liquid metal not solidified completely from going out mould 100, vavuum pump 300 and connecting tube 400 are caused to damage.
As shown in figure 3, generally including following steps using the pressure casting method according to die casting equipment of the invention：
Step 1：From cast gate 140 to being pressed into liquid metal in mould 100；
Step 2：Vavuum pump 300 is opened to extract the air in die cavity 130 out by exhaust passage 230；
Step 3：After air is pumped, vavuum pump 300 is closed, wherein, the step specifically includes step 3a：When liquid metal enters
When entering exhaust passage 230 and being frozen into solid metallic, solid metallic blocks exhaust passage 230, and vavuum pump 300 is closed；Step 3b：
When still keeping liquid when liquid metal reaches exhaust passage 230 adjacent to the position at the second end 232, hygrosensor 600 is detected
To environment temperature is higher than temperature threshold and sends alarm, vavuum pump 600 is closed；
Step 4：After liquid metal in die cavity 130 solidifies completely, die casting is taken out in die sinking；
Step 5：Start ejecting device 510 and promote knock pin 500, removal is attached to first exhaust plate 210 or second exhaust
Metallic residue on plate 210.
Compared with the die casting equipment of prior art, die casting equipment of the invention is combined well using exhaust structure 200
The characteristic of extrusion process and the product development to porosity between 1-3%, had both met internal porosity requirement, and can save
Cost, greatly improves production efficiency, and porosity stability contorting is 2.5% or so, simultaneously because the stomata of high speed die casting is presented
Uniform bulk structure, internal flaw causes intensity deficiency problem in bulk under low speed processes are compensate for well.
Above example only expresses embodiments of the present invention, therefore its description is more specific and detailed, but can not be
And it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, not
On the premise of departing from present inventive concept, various modifications and improvements can be made, these belong to protection scope of the present invention.Cause
This, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (9)
1. a kind of die casting equipment, it is characterised in that including mould, the exhaust structure being arranged in the mould and be arranged at institute
The vavuum pump of mold exterior is stated, wherein,
The mould includes the first die holder, the second die holder and when first die holder and second die holder are closed by described
Die cavity and cast gate that first die holder and second die holder are limited, the cast gate connect the outside of the die cavity and the mould；
The exhaust structure includes the first exhaust plate being arranged on first die holder, be arranged on second die holder the
Two exhaustion plates and when first die holder and second die holder are closed by the first exhaust plate and the second exhaust
The exhaust passage that plate is limited；
The first end of the exhaust passage is connected with the die cavity in the mould, and second end relative with the first end leads to
Connecting tube is crossed to be connected with the vavuum pump.
2. die casting equipment according to claim 1, it is characterised in that the die casting equipment also includes being arranged at described first
On die holder or the second die holder at least one knock pin, exhaust passage described in the ejection pin connection and be arranged at outside the mould
The ejecting device in portion.
3. die casting equipment according to claim 2, it is characterised in that the die casting equipment also includes hygrosensor, institute
State hygrosensor and be arranged at the first exhaust plate or second exhaust plate near the side of the vavuum pump.
4. the die casting equipment according to any one of claim 1-3, it is characterised in that the exhaust passage is from described first
It is in fold-line-shaped to hold to the extension track at second end.
5. die casting equipment according to claim 4, it is characterised in that the broken line angle of the exhaust passage is 30 °.
6. die casting equipment according to claim 5, it is characterised in that when first die holder and second die holder are closed
When, the distance between the first exhaust plate and described second exhaust plate are by the first end of the exhaust passage to described
Two ends are gradually reduced.
7. the die casting equipment according to any one of claim 1-3, it is characterised in that the exhaust passage is described first
Cross-sectional area and the cross-sectional area ratio of the cast gate at end are 1:15.
8. a kind of usage right requires the pressure casting method of the die casting equipment any one of 1-7, it is characterised in that methods described
Comprise the steps of：
Step 1：From cast gate to being pressed into liquid metal in mould；
Step 2：Vavuum pump is opened to extract the air in die cavity out by exhaust passage；
Step 3：After air is pumped, the vavuum pump is closed；
Step 4：After the liquid metal in the die cavity solidifies completely, die casting is taken out in die sinking；
Step 5：Start ejecting device and promote knock pin, the metal that removal is attached on first exhaust plate or second exhaust plate is residual
Slag.
9. pressure casting method according to claim 8, it is characterised in that
The step 3 also includes：
Step 3a：When the liquid metal is into the exhaust passage and when being frozen into solid metallic, the solid metallic is blocked
The exhaust passage, the vavuum pump is closed；
Step 3b：When still keeping liquid when the liquid metal reaches the exhaust passage adjacent to the position at second end,
Hygrosensor detects environment temperature higher than temperature threshold and sends alarm, and the vavuum pump is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710056626.8A CN106694848A (en) | 2017-01-25 | 2017-01-25 | Pressure casting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710056626.8A CN106694848A (en) | 2017-01-25 | 2017-01-25 | Pressure casting device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106694848A true CN106694848A (en) | 2017-05-24 |
Family
ID=58909692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710056626.8A Pending CN106694848A (en) | 2017-01-25 | 2017-01-25 | Pressure casting device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106694848A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107486547A (en) * | 2017-09-30 | 2017-12-19 | 天津市发利汽车压铸件厂 | exhaust block and die assembly |
| CN108838363A (en) * | 2018-07-17 | 2018-11-20 | 陈铿然 | A kind of evacuated die-casting process device |
| CN111036877A (en) * | 2019-12-12 | 2020-04-21 | 胡利丽 | Anti-blocking device for exhaust pipe of die casting die |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102218A (en) * | 1986-03-20 | 1987-09-30 | 大和工业株式会社 | Casting die and die casting equipment |
| JPH08332558A (en) * | 1995-06-08 | 1996-12-17 | Toshiba Mach Co Ltd | Method for controlling vacuum degree in vacuum die casting and device therefor |
| CN101850412A (en) * | 2009-04-01 | 2010-10-06 | 苏州汉扬精密电子有限公司 | Die-casting die with exhaust device |
| CN101898237A (en) * | 2009-05-19 | 2010-12-01 | 株式会社东芝 | The manufacture method of metal die and cast member |
| CN102642007A (en) * | 2012-04-27 | 2012-08-22 | 清华大学 | Vacuum die casting mould |
| CN203751298U (en) * | 2013-12-19 | 2014-08-06 | 珠海嵘泰有色金属铸造有限公司 | Movable and fixed wave peak exhaust device |
| CN204413097U (en) * | 2014-12-16 | 2015-06-24 | 宁波遵航汽车零部件有限公司 | One is novel vacuumizes mould |
| CN206445196U (en) * | 2017-01-25 | 2017-08-29 | 太仓海嘉车辆配件有限公司 | A kind of die casting equipment |
-
2017
- 2017-01-25 CN CN201710056626.8A patent/CN106694848A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102218A (en) * | 1986-03-20 | 1987-09-30 | 大和工业株式会社 | Casting die and die casting equipment |
| JPH08332558A (en) * | 1995-06-08 | 1996-12-17 | Toshiba Mach Co Ltd | Method for controlling vacuum degree in vacuum die casting and device therefor |
| CN101850412A (en) * | 2009-04-01 | 2010-10-06 | 苏州汉扬精密电子有限公司 | Die-casting die with exhaust device |
| CN101898237A (en) * | 2009-05-19 | 2010-12-01 | 株式会社东芝 | The manufacture method of metal die and cast member |
| CN102642007A (en) * | 2012-04-27 | 2012-08-22 | 清华大学 | Vacuum die casting mould |
| CN203751298U (en) * | 2013-12-19 | 2014-08-06 | 珠海嵘泰有色金属铸造有限公司 | Movable and fixed wave peak exhaust device |
| CN204413097U (en) * | 2014-12-16 | 2015-06-24 | 宁波遵航汽车零部件有限公司 | One is novel vacuumizes mould |
| CN206445196U (en) * | 2017-01-25 | 2017-08-29 | 太仓海嘉车辆配件有限公司 | A kind of die casting equipment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107486547A (en) * | 2017-09-30 | 2017-12-19 | 天津市发利汽车压铸件厂 | exhaust block and die assembly |
| CN107486547B (en) * | 2017-09-30 | 2019-11-29 | 天津市发利汽车压铸件厂 | Exhaust block and die assembly |
| CN108838363A (en) * | 2018-07-17 | 2018-11-20 | 陈铿然 | A kind of evacuated die-casting process device |
| CN111036877A (en) * | 2019-12-12 | 2020-04-21 | 胡利丽 | Anti-blocking device for exhaust pipe of die casting die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170524 |
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| RJ01 | Rejection of invention patent application after publication |