CN201058370Y - Low pressure casting rising liquid pipe - Google Patents
Low pressure casting rising liquid pipe Download PDFInfo
- Publication number
- CN201058370Y CN201058370Y CNU2007200804111U CN200720080411U CN201058370Y CN 201058370 Y CN201058370 Y CN 201058370Y CN U2007200804111 U CNU2007200804111 U CN U2007200804111U CN 200720080411 U CN200720080411 U CN 200720080411U CN 201058370 Y CN201058370 Y CN 201058370Y
- Authority
- CN
- China
- Prior art keywords
- stalk
- pressure casting
- casting
- low pressure
- damper
- 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.)
- Expired - Lifetime
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Abstract
Disclosed is a low pressure casting lift tube; a damper fixedly connected with a lift tube is arranged at the inlet of the lift tube, four to eight holes are evenly distributed on the lateral surface of the damper. When casting, the low pressure casting lift tube of the utility model reduces metal splashing, the impact agitation of the leftover metal on copple bottom and the inclusion defect of the casting; thus the casting quality is greatly improved.
Description
Technical field
The utility model belongs to the stalk field that low pressure casting is used.
Background technology
Low pressure casting is to make liquid metals at lower pressure effect retrofilling die cavity, to form a kind of method of foundry goods.Its technical process is in the container of sealing, feeds dry compressed air, and under the effect of gas pressure, liquid metals rises along stalk, enters die cavity reposefully by cast gate, and keeps the gas pressure on the liquid level in the crucible; After solidifying fully to foundry goods, remove the gas pressure on the liquid level, make not solidified liquid metals backflow crucible in the stalk, take out foundry goods again.
Because it is more steady that the liquid metals in the low pressure casting fills type, casting forming is good, clear-cut, any surface finish, dense structure, the mechanical performance height, technology recovery rate height, working condition is good, be easy to realize mechanization and automation, thereby the mode of low pressure casting is used widely.But mobile the having a significant impact of the geometrical property liquid towards metal of stalk can directly have influence on the metallurgical quality of foundry goods, and be all closely related with the character of stalk as the pore in the foundry goods, oxide inclusion and slag inclusion.The problem that existing stalk exists has:
1, in cast, when liquid metals enters die cavity via stalk, is easy to generate the metal splash, causes casting flaws such as secondary oxidation is mingled with, cold shot;
2, when liquid metals refluxes, liquid metal stream is directly impacted crucible bottom, can form the metal of crucible bottom to impact to stir, and the field trash of precipitation crucible bottom is suspended again, these field trashes entered foundry goods with liquid metal stream when poured into a mould next time, caused the inclusion defect of foundry goods.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of low pressure casting stalk that reduces the splash of liquid metals when pouring into a mould and the metal of staying crucible bottom is impacted stirring.
The utility model solves the problems of the technologies described above with following technical scheme: there is a damper of fixedlying connected with stalk in the import department at stalk, and there are 4～8 uniform on circumference apertures the damper side.
The area sum of aperture is 1: 5～1: 10 with the ratio of stalk cross-sectional area.
Low-pressure casting lift tube of the present utility model, the metal splash when having reduced cast and the impact of crucible bottom residual metallic stirred has reduced the inclusion defect of foundry goods, has obviously improved casting quality.
Description of drawings
Fig. 1 is the structural representation of low-pressure casting lift tube of the present utility model.
Fig. 2 is the flow condition schematic diagram of liquid metal when stalk enters die cavity in crucible.
The specific embodiment
As shown in Figure 1, in the import department of stalk 1 damper 2 of fixedlying connected with pin 3 with stalk is arranged, there are 4～8 uniform on circumference apertures 4 the damper side.
The area sum of aperture is 1: 5～1: 10 with the ratio of stalk cross-sectional area.
When using low-pressure casting lift tube of the present utility model, working condition as shown in Figure 2:
In smelting furnace 8, be placed with crucible 7, the good liquid metal 6 of fusing is arranged in the crucible 7.Stalk 1 is the passage that connects interior liquid metal of crucible and casting mold.The effect of stalk is that the liquid metal in the crucible is incorporated in the die cavity 5.Under the effect of gas pressure, the aperture 4 of the liquid metal in the crucible by damper 2 enters stalk 1 back and rises and enter die cavity 5 along stalk 1.After treating that the interior foundry goods of die cavity solidifies fully, remove gas pressure, the liquid metal of ot-yet-hardened flows back in the crucible 7 by aperture 4 under the gravity effect in the stalk 1, can open die cavity and take out foundry goods.
Owing to damper with holes is arranged at the entrance point of stalk, during cast, when liquid metal stream is flowed through aperture when entering stalk, streamline because of violent compression after expansion suddenly produce local frictional resistance, can suppress the velocity fluctuation in the casting process effectively; Behind the casting solidification, not solidified liquid metal slowly refluxes out from the side of damper by aperture in the stalk, can the molten metal of crucible bottom not impacted, and has prevented the generation of foundry goods field trash.
After cast finishes, damper can be pulled down, the stalk inwall is cleared up.
Damper can be made by resistant to elevated temperatures aluminium oxide ceramics, carborundum or graphite.
Claims (2)
1. a low-pressure casting lift tube is characterized in that in the import department of stalk a damper of fixedlying connected with stalk being arranged, and there are 4～8 uniform on circumference apertures the damper side.
2. low-pressure casting lift tube as claimed in claim 1, the area sum that it is characterized in that aperture on the damper is 1: 5～1: 10 with the ratio of stalk cross-sectional area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200804111U CN201058370Y (en) | 2007-07-18 | 2007-07-18 | Low pressure casting rising liquid pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200804111U CN201058370Y (en) | 2007-07-18 | 2007-07-18 | Low pressure casting rising liquid pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201058370Y true CN201058370Y (en) | 2008-05-14 |
Family
ID=39406823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200804111U Expired - Lifetime CN201058370Y (en) | 2007-07-18 | 2007-07-18 | Low pressure casting rising liquid pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201058370Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480825A (en) * | 2012-12-20 | 2014-01-01 | 江苏凯特汽车部件有限公司 | Novel combined type ceramic liquid ascending pipe for low-pressure casting aluminum alloy wheel |
| CN105921718A (en) * | 2016-06-13 | 2016-09-07 | 南通爱尔思轻合金精密成型有限公司 | Sealing device for metal mold low-pressure cast lift tube |
| CN107931568A (en) * | 2016-10-12 | 2018-04-20 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of stalk for low pressure casting |
| CN115502369A (en) * | 2022-10-31 | 2022-12-23 | 哈尔滨工业大学 | Slag-blocking method for low-pressure casting of magnesium alloy |
-
2007
- 2007-07-18 CN CNU2007200804111U patent/CN201058370Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480825A (en) * | 2012-12-20 | 2014-01-01 | 江苏凯特汽车部件有限公司 | Novel combined type ceramic liquid ascending pipe for low-pressure casting aluminum alloy wheel |
| CN105921718A (en) * | 2016-06-13 | 2016-09-07 | 南通爱尔思轻合金精密成型有限公司 | Sealing device for metal mold low-pressure cast lift tube |
| CN107931568A (en) * | 2016-10-12 | 2018-04-20 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of stalk for low pressure casting |
| CN115502369A (en) * | 2022-10-31 | 2022-12-23 | 哈尔滨工业大学 | Slag-blocking method for low-pressure casting of magnesium alloy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080514 |
|
| CX01 | Expiry of patent term |