CN105750527A - Method for sealing riser tube for casting - Google Patents
Method for sealing riser tube for casting Download PDFInfo
- Publication number
- CN105750527A CN105750527A CN201610243149.1A CN201610243149A CN105750527A CN 105750527 A CN105750527 A CN 105750527A CN 201610243149 A CN201610243149 A CN 201610243149A CN 105750527 A CN105750527 A CN 105750527A
- Authority
- CN
- China
- Prior art keywords
- sealing
- stalk
- graphite gasket
- casting
- riser tube
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention relates to a method for sealing a riser tube for casting.According to the technical scheme, a graphite washer is adopted as a main sealing pad, a sprue core is made of high temperature resisting ceramic, a bush is arranged, and therefore the sealing effect can be guaranteed for a long time, and the problem of generating bubbles in the pouring process is avoided.The heat resistance of the sealing pad and a joint is guaranteed, air leakage between an opening of the riser tube and a 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 encapsulating method, especially a kind of encapsulating method 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 encapsulating method of casting stalk is:
1. adopt graphite gasket as body seal pad；
2. graphite gasket is arranged on two end faces of stalk ring flange, and ensures that graphite gasket goes up plane higher than median septum upper surface after compressing；
3. gate core adopts refractory ceramics material；
4. the gate core described in is outside equipped with step and is provided with the lining of annular, and lining is pressed in the graphite gasket of stalk ring flange upper surface.
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 enforcement schematic diagram of method described in embodiment.
Detailed description of the invention
A kind of encapsulating method casting use stalk, described method includes herein below:
1. adopt graphite gasket as body seal pad；
2. graphite gasket is arranged on two end faces of stalk ring flange, and ensures that graphite gasket goes up plane higher than median septum upper surface after compressing；
3. gate core adopts refractory ceramics material；
4. the gate core described in is outside equipped with step and is provided with the lining of annular, and lining is pressed in the graphite gasket of stalk ring flange upper surface.
Embodiment
As it can be seen, certain low-pressure die casting plant, for the cast of magnesium alloy parts, the encapsulating method of its stalk is:
1. adopt graphite gasket 6 as body seal pad；
2. after installing median septum 3, graphite gasket being placed into median septum 3 center, then places stalk 1, the ring flange 2 on stalk 1 is pressed in graphite gasket, graphite gasket is placed on stalk ring flange 2 upper surface again, and after graphite gasket compression, upper plane is higher than median septum 3 upper surface 1.2mm；
3. gate core 5 adopts refractory ceramics material, is placed on bottom board 4 by pottery gate core 5；
4. gate core 5 is outside equipped with step and is provided with the lining 7 of annular, is placed on median septum 3 by bottom board 4, and makes lining 7 be pressed in the graphite gasket of stalk ring flange 2 upper surface.
Claims (1)
1. one kind casts with the encapsulating method of stalk, it is characterised in that described method includes techniques below content:
1) adopt graphite gasket as body seal pad；
2) graphite gasket is arranged on two end faces of stalk ring flange, and ensures that graphite gasket goes up plane higher than median septum upper surface after compressing；
3) gate core adopts refractory ceramics material；
4) gate core described in is outside equipped with step and is provided with the lining of annular, and lining is pressed in the graphite gasket of stalk ring flange upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610243149.1A CN105750527A (en) | 2016-04-19 | 2016-04-19 | Method for sealing riser tube for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610243149.1A CN105750527A (en) | 2016-04-19 | 2016-04-19 | Method for sealing riser tube for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105750527A true CN105750527A (en) | 2016-07-13 |
Family
ID=56335333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610243149.1A Pending CN105750527A (en) | 2016-04-19 | 2016-04-19 | Method for sealing riser tube for casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105750527A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108907146A (en) * | 2018-07-31 | 2018-11-30 | 哈尔滨工业大学 | Large-scale copper alloy propeller double-station antigravity casting machine stalk placing device |
Citations (7)
| 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 |
| US20040026467A1 (en) * | 2000-07-12 | 2004-02-12 | Werner Plattner | Sliding closure for casting molten metal and corresponding refractory plate unit |
| US6755235B1 (en) * | 2002-08-12 | 2004-06-29 | Hayes Lemmerz International, Inc. | Quick-change lock assembly for casting machine fill tubes |
| US20050155992A1 (en) * | 2004-01-21 | 2005-07-21 | Klingensmith Marshall A. | Compliant fill tube assembly, fill tube therefor and method of use |
| 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 |
| CN105108107A (en) * | 2015-09-11 | 2015-12-02 | 中信戴卡股份有限公司 | Low-pressure casting heat preserving furnace for molding filling of screw pump |
-
2016
- 2016-04-19 CN CN201610243149.1A patent/CN105750527A/en active Pending
Patent Citations (7)
| 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 |
| US20040026467A1 (en) * | 2000-07-12 | 2004-02-12 | Werner Plattner | Sliding closure for casting molten metal and corresponding refractory plate unit |
| US6755235B1 (en) * | 2002-08-12 | 2004-06-29 | Hayes Lemmerz International, Inc. | Quick-change lock assembly for casting machine fill tubes |
| US20050155992A1 (en) * | 2004-01-21 | 2005-07-21 | Klingensmith Marshall A. | Compliant fill tube assembly, fill tube therefor and method of use |
| 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 |
| CN105108107A (en) * | 2015-09-11 | 2015-12-02 | 中信戴卡股份有限公司 | Low-pressure casting heat preserving furnace for molding filling of screw pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108907146A (en) * | 2018-07-31 | 2018-11-30 | 哈尔滨工业大学 | Large-scale copper alloy propeller double-station antigravity casting machine stalk placing device |
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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 |
Application publication date: 20160713 |
|
| WD01 | Invention patent application deemed withdrawn after publication |