CN105750528A - Sealing structure of riser tube for casting - Google Patents
Sealing structure of riser tube for casting Download PDFInfo
- Publication number
- CN105750528A CN105750528A CN201610243229.7A CN201610243229A CN105750528A CN 105750528 A CN105750528 A CN 105750528A CN 201610243229 A CN201610243229 A CN 201610243229A CN 105750528 A CN105750528 A CN 105750528A
- Authority
- CN
- China
- Prior art keywords
- riser tube
- sealing structure
- sealing
- graphite
- casting
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Abstract
The invention relates to a sealing structure of a riser tube for casting.The sealing structure comprises a middle separation plate, graphite washers, a sprue core and a bush.A flange plate is arranged on the riser tube and mounted on the middle separation plate.The graphite washers are arranged at the two ends of the flange plate, and the upper surface of the graphite washer on the upper layer is higher than the upper surface of the middle separation plate.The sprue core is made of a high temperature resisting ceramic material, a step is arranged outside the sprue core, the bush is mounted on the step, the sprue core is arranged on a center hole of a pouring bottom plate, and the bush is pressed on the graphite washer on the upper layer.According to the sealing structure, the heat resistance of a sealing pad and a joint is guaranteed, air leakage between an opening of the riser tube and the middle separation plate and between the opening of the riser tube and the pouring bottom plate is avoided, meanwhile, sealing in a cavity is improved, molten magnesium is prevented from being oxidized by external air, and the sealing effect of low-pressure equipment is improved.
Description
Technical field
The present invention relates to a kind of structure that seals, especially a kind of sealing structure casting use stalk.
Background technology
In magnesium alloy low-pressure casting, magnesium alloy liquation, through median septum, is transported in the casting mold of top by stalk.Need between stalk and median septum and bottom board to seal, to ensure the pressure differential of upper and lower tank, and ensure that oxidation reaction does not occur aluminium alloy in casting process.Traditional encapsulating method adopts asbestos pad or ceramic fiber cotton as sealing gasket, is placed in stalk ring flange both ends of the surface by asbestos pad or ceramic fiber cotton as encapsulant and seals.Due to long-time hot environment, the tissue of asbestos pad or ceramic fiber cotton can be deteriorated, performance becomes fragile, decrease in strength, thus causing seal failure, it cannot be guaranteed that while pressure differential, bad this position aluminium alloy that also results in of position seals of stalk and bottom board gate core aoxidizes in casting process, time serious, may result in foundry goods burning.
Summary of the invention
It is an object of the invention to provide a kind of casting with the encapsulating method of stalk, it is possible to achieve effectively seal, it is ensured that casting quality.
The technical scheme is that, the sealing structure of casting stalk includes median septum, graphite gasket, gate core, lining, stalk is provided with ring flange and is arranged on median septum, ring flange is positioned on median septum, and ring flange two ends are provided with graphite gasket, and the upper surface of upper strata graphite gasket is higher than median septum upper surface, the material of described gate core is high temperature ceramic material, outside is provided with step, step is provided with lining, gate core is arranged on bottom board centre bore, and lining is pressed in the graphite gasket of upper strata.
The present invention adopts graphite gasket as body seal pad, and graphite material is high temperature resistant, and structure property is stable in high temperature environments, can ensure sealing effectiveness for a long time；Refractory ceramics material gate core can overcome roughing sand type cast gate feel intensity is low, the easy shortcoming such as defeated and dispersed, it is possible to avoid the problem that sand mold gate core produces bubble in casting process；Lining can fix sand mold, simultaneously by compressing graphite gasket, it is achieved seal.The present invention ensures the thermostability of sealing gasket and joint location, it is to avoid leak air between stalk mouth and median septum and bottom board, improves the sealing in die cavity, it is to avoid magnesium liquid is subject to the oxidation of outside air and improves the sealing effectiveness of low-voltage equipment simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
As shown in the figure, the sealing structure of casting stalk includes median septum 3, graphite gasket 6, gate core 5, lining 7, on stalk, 1 is provided with ring flange 2 and is arranged on median septum 3, ring flange 2 is positioned on median septum 3, and ring flange 2 two ends are provided with graphite gasket 6, and the upper surface of upper strata graphite gasket is higher than median septum 3 upper surface, the material of described gate core 5 is high temperature ceramic material, outside is provided with step, step is provided with lining 7, gate core 5 is arranged on bottom board 4 centre bore, and lining 7 is pressed in the graphite gasket of upper strata.
Claims (1)
1. one kind casts by the sealing structure of stalk, it is characterized in that, described structure includes median septum (3), graphite gasket (6), gate core (5), lining (7), on stalk, (1) is provided with ring flange (2) and is arranged on median septum (3), ring flange (2) is positioned on median septum (3), and ring flange (2) two ends are provided with graphite gasket (6), and the upper surface of upper strata graphite gasket is higher than median septum (3) upper surface, the material of described gate core (5) is high temperature ceramic material, outside is provided with step, step is provided with lining (7), gate core (5) is arranged on bottom board (4) centre bore, and lining (7) is pressed in the graphite gasket of upper strata.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610243229.7A CN105750528A (en) | 2016-04-19 | 2016-04-19 | Sealing structure of riser tube for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610243229.7A CN105750528A (en) | 2016-04-19 | 2016-04-19 | Sealing structure of riser tube for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105750528A true CN105750528A (en) | 2016-07-13 |
Family
ID=56335329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610243229.7A Pending CN105750528A (en) | 2016-04-19 | 2016-04-19 | Sealing structure of riser tube for casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105750528A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807307A (en) * | 2017-11-20 | 2019-05-28 | 科华控股股份有限公司 | A kind of sealing fixed structure of antigravity casting ceramic lift tube |
| CN114210951A (en) * | 2021-12-21 | 2022-03-22 | 浙江万丰精密制造有限公司 | Flange device of liquid lifting pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045934A (en) * | 1989-03-31 | 1990-10-10 | 吴欣 | Ferrous die casting method and equipment thereof |
| JPH06114529A (en) * | 1992-10-06 | 1994-04-26 | Hitachi Metals Ltd | Gasket for double stoke |
| US6216766B1 (en) * | 1994-02-10 | 2001-04-17 | Reynolds Wheels International Ltd. | Fluid-tight coupling device for a feeder pipe |
| CN201644757U (en) * | 2009-09-28 | 2010-11-24 | 重庆建设摩托车股份有限公司 | Liquid-lifting pipe joint position structure of low-pressure casting liquid-lifting system |
| CN102886502A (en) * | 2012-10-19 | 2013-01-23 | 张家港市清大星源微晶有限公司 | Material conveying device in amorphous ribbon-making machine |
| CN205599903U (en) * | 2016-04-19 | 2016-09-28 | 哈尔滨东安发动机（集团）有限公司 | Casting is with seal structure of stalk |
-
2016
- 2016-04-19 CN CN201610243229.7A patent/CN105750528A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045934A (en) * | 1989-03-31 | 1990-10-10 | 吴欣 | Ferrous die casting method and equipment thereof |
| JPH06114529A (en) * | 1992-10-06 | 1994-04-26 | Hitachi Metals Ltd | Gasket for double stoke |
| US6216766B1 (en) * | 1994-02-10 | 2001-04-17 | Reynolds Wheels International Ltd. | Fluid-tight coupling device for a feeder pipe |
| CN201644757U (en) * | 2009-09-28 | 2010-11-24 | 重庆建设摩托车股份有限公司 | Liquid-lifting pipe joint position structure of low-pressure casting liquid-lifting system |
| CN102886502A (en) * | 2012-10-19 | 2013-01-23 | 张家港市清大星源微晶有限公司 | Material conveying device in amorphous ribbon-making machine |
| CN205599903U (en) * | 2016-04-19 | 2016-09-28 | 哈尔滨东安发动机（集团）有限公司 | Casting is with seal structure of stalk |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807307A (en) * | 2017-11-20 | 2019-05-28 | 科华控股股份有限公司 | A kind of sealing fixed structure of antigravity casting ceramic lift tube |
| CN114210951A (en) * | 2021-12-21 | 2022-03-22 | 浙江万丰精密制造有限公司 | Flange device of liquid lifting pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160713 |