CN101774008A - Sealing method used for low-pressure casting - Google Patents
Sealing method used for low-pressure casting Download PDFInfo
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- CN101774008A CN101774008A CN201010111968A CN201010111968A CN101774008A CN 101774008 A CN101774008 A CN 101774008A CN 201010111968 A CN201010111968 A CN 201010111968A CN 201010111968 A CN201010111968 A CN 201010111968A CN 101774008 A CN101774008 A CN 101774008A
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Abstract
The invention relates to a sealing method used between a low-pressure casting crucible and a workbench face and between the workbench face and a casting mould. In the sealing method, the middle part of the entire casting system comprising a crucible, a support plate and a sealed cover plate (the workbench face) generates downward tiny displacement by adding a plurality of strong springs at the bottom of the low-pressure casting crucible and utilizing the self mass of the casting mould or the mass of an additional casting mould to enable the strong springs to generate tiny compression deformation, the tiny displacement causes the support plate and the sealed cover plate to generate elastic deformation so as to generate an upward stress, and the stress can further press a sealing ring between the low-pressure casting crucible and the sealed cover plate and a sealing ring between the sealed cover plate and the casting mould so as to achieve a favorable sealing effect. The invention has low equipment requirement to low-pressure casting, easy realization, lower cost, simple operation and easy popularization.
Description
Technical field
What the present invention relates to is a kind of encapsulating method that is used between low-pressure casting crucible and work top, work top and the casting mold, belongs to metal material or metallurgical technology field.
Background technology
In the low pressure casting production process, before pouring into a mould, guarantee that alloy liquid steadily charges into die cavity and do not leak or the fluctuation of liquid level thereby need whole low-pressure system sealed to guarantee that Compressed Gas can steadily be exerted pressure to alloy liquid, select therefore that encapsulant and method are most important safely and effectively.In the low pressure casting system, there are two linkage interfaces to seal, one is the sealing between crucible and the cover plate (work top), another is the sealing between cover plate (work top) and the casting mold.Sealing between crucible and the cover plate, conventional method is to establish a groove at crucible edge and cover plate contact site, then with in asbestos board or the asbestos cord embedded groove, leak to prevent gas with fastening bolt locking cover plate again, perhaps adopt the encapsulating method of low-melting alloy in the Chinese patent 00110500.5.Sealing between cover plate and the casting mold, generally with the asbestos washer pad at stalk mouth of pipe place, after casting mold is put into working face, with casting mold and cover plate by fastening bolt locking or adopt mention in the United States Patent (USP) 4133370 above casting mold, casting mold is applied the effect that downward pressure reaches further sealing by one flat plate.
The above encapsulating method that adopts has the following disadvantages: (1) is for the sealing between crucible and the cover plate, during by locked with bolts, usually need a plurality of people's cooperations to finish, each operative employee's strength difference, therefore cause bolt not locked or discontinuity probably, the both can influence sealing effectiveness.(2) for the sealing between cover plate and the casting mold, usually casting mold all will carry out the preheating of different temperatures before cast, the operator is in the mould holding screw of giving heat, be under the environment of heat, to work, be easy to generate the phenomenon of fastening bolt discontinuity, occur industrial accident simultaneously easily, and the method that adopts United States Patent (USP) 4133370 to mention, need to add extra equipment, improve device fabrication and maintenance cost.
Summary of the invention
Purpose of the present invention is not significantly increasing under the condition of low-pressure die casting plant cost, and a kind of simple and effective encapsulating method is provided.
In order to reach this effect, technical scheme of the present invention as shown in Figure 1: add several brute springs in crucible bottom, the compression of utilizing the sole mass of casting mold that spring is produced reaches the effect of further sealing.The process of sealing method work is as follows: after the melting of (1) alloy liquid is finished, groove in gripper shoe is placed sealing ring 9, the sealing circle is made up of fluorine-containing alumina silicate fibre bar and high-temperature agglomerant, cover seal cover board 7 backs by fastening bolt 8 lock sealing cover plates, at this moment, aluminum fluosilicate ribbon in the sealing ring produces certain deformation under pressure, high-temperature agglomerant begins to solidify under the condition of heat, and the sealing effectiveness between plate and the crucible reaches general low pressure casting level; (2) on seal cover board, place sealing ring 10, the sealing circle is made up of fluorine-containing alumina silicate fibre packing ring and high-temperature agglomerant, the sealing circle requires to have certain thickness, be generally the 4-6 millimeter, then casting mold is placed on the seal cover board top by equipment such as drivings, because casting mold has bigger quality usually, casting mold is placed and is on the cover board made brute spring 15 that micro-compression takes place, this moment whole casting system, comprise crucible, gripper shoe and seal cover board middle part all can produce downward microdisplacement, and gripper shoe and seal cover board generation elastic deformation produce a stress that makes progress, this stress can further compress sealing ring 9 and 10, reaches good sealing effectiveness; (3) connect Compressed Gas 6 and can carry out low pressure casting production.
This low pressure casting encapsulating method is compared with conventional encapsulating method, has following characteristics and marked improvement: (1) sealing method is low to the equipment requirement of low pressure casting, realizes that easily cost is low, is easy to promote; (2) the sealing method is utilized the casting mold sole mass to make brute spring and seal cover board that micro-strain take place and is produced compression, this compression can promote the sealing effectiveness of low pressure casting system, this method is simple to operate, not only reduced workman's working strength, simultaneously, also shortened casting mold assembly period, improved production efficiency, be particularly suitable for the bigger occasion of casting mold sole mass, as large-scale sand mold low pressure casting, for the less casting mold of quality, on casting mold, place the bigger metal type dies of quality and also can reach similar effects.
Description of drawings
Fig. 1 is a low pressure casting encapsulating method schematic diagram of the present invention.
Among Fig. 1,1-crucible, 2-alloy liquid, the 3-stalk, 4-supports steel column, 5-gripper shoe, 6-Compressed Gas passage, 7-seal cover board, 8-fastening bolt, sealing ring between 9-gripper shoe and the cover plate, the sealing ring between 10-casting mold and the cover plate, 11-casting mold, 12-master's running channel, 13-running channel, 14-foundry goods, 15-brute spring.
Specific embodiment
In the production practices of aluminium alloy large-sized housing (hundreds of kilogram) sand mold low pressure casting, when adopting above-mentioned encapsulating method to produce, in low pressure casting process, do not find gas leak phenomenon, this kind method favorable sealing property is described.
In the production practices of the small-sized foundry goods of magnesium alloy (tens kilograms) sand mold low pressure casting, when adopting above-mentioned encapsulating method to produce, above casting mold, place extra metal type dies to increase the casting mold deadweight, in the whole process of low pressure casting the gas leakage phenomenon not taking place, illustrates that this kind method sealing property is good.
Claims (1)
1. encapsulating method that is used for low pressure casting, it is characterized in that: add several brute springs in the low-pressure casting crucible bottom, utilize casting mold sole mass (or adding the casting mold quality) to make brute spring that micro-compression take place, make whole casting system, comprise crucible, gripper shoe and seal cover board (work top) middle part all produces downward microdisplacement, microdisplacement causes gripper shoe and seal cover board generation elastic deformation, produce a stress that makes progress, this stress can further compress the sealing ring between the sealing ring between crucible in the low pressure casting and the seal cover board and seal cover board and the casting mold, reaches good sealing effectiveness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010111968A CN101774008A (en) | 2010-02-19 | 2010-02-19 | Sealing method used for low-pressure casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010111968A CN101774008A (en) | 2010-02-19 | 2010-02-19 | Sealing method used for low-pressure casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101774008A true CN101774008A (en) | 2010-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201010111968A Pending CN101774008A (en) | 2010-02-19 | 2010-02-19 | Sealing method used for low-pressure casting |
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| CN (1) | CN101774008A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179498A (en) * | 2011-06-21 | 2011-09-14 | 海门市沪海有色铸造有限公司 | Energy-saving device of liquid rising pipe of low-pressure casting machine |
| CN103409641A (en) * | 2013-07-16 | 2013-11-27 | 辽宁科技大学 | Plugging method for bottom water tank and crystallizer during stripping electroslag re-melting |
| CN103862021A (en) * | 2012-12-18 | 2014-06-18 | 侯伟 | Dual-layer sealing furnace cover for low-pressure casting |
| CN105442050A (en) * | 2015-12-29 | 2016-03-30 | 湖南顶立科技有限公司 | Material container applicable to ingot furnace |
| CN110883326A (en) * | 2019-11-25 | 2020-03-17 | 哈尔滨工业大学 | Automatic adjusting and sealing method for top-jacking riser tube differential pressure casting machine |
| CN110899663A (en) * | 2019-11-25 | 2020-03-24 | 哈尔滨工业大学 | Automatic adjusting and sealing mechanism for top liquid lifting pipe of anti-gravity casting machine |
| CN113503778A (en) * | 2021-06-28 | 2021-10-15 | 上海机电工程研究所 | Foamed aluminum bonding device and using method thereof |
| CN114888239A (en) * | 2022-05-18 | 2022-08-12 | 上海交通大学 | Connecting sealing structure for antigravity precision casting and antigravity casting equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3563938A (en) * | 1969-05-16 | 1971-02-16 | United States Steel Corp | Inlet construction for vacuum vessels |
| SU435066A1 (en) * | 1973-03-15 | 1974-07-05 | Институт проблем лить | DEVICE FOR FILLING FORMS UNDER ADJUSTABLE PRESSURE |
| BE837034A (en) * | 1974-12-24 | 1976-06-23 | LOW PRESSURE CASTING PROCESS AND PLANT IN SAND MOLD | |
| CN1264631A (en) * | 2000-03-29 | 2000-08-30 | 上海交通大学 | Sealing material and method for low-pressure casting crucible |
-
2010
- 2010-02-19 CN CN201010111968A patent/CN101774008A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3563938A (en) * | 1969-05-16 | 1971-02-16 | United States Steel Corp | Inlet construction for vacuum vessels |
| SU435066A1 (en) * | 1973-03-15 | 1974-07-05 | Институт проблем лить | DEVICE FOR FILLING FORMS UNDER ADJUSTABLE PRESSURE |
| BE837034A (en) * | 1974-12-24 | 1976-06-23 | LOW PRESSURE CASTING PROCESS AND PLANT IN SAND MOLD | |
| CN1264631A (en) * | 2000-03-29 | 2000-08-30 | 上海交通大学 | Sealing material and method for low-pressure casting crucible |
Non-Patent Citations (2)
| Title |
|---|
| 《张家口职业技术学院学报》 20000531 曹惠中等 低压铸造机炉体弹簧支撑结构的设计与应用 第13卷, 第02期 * |
| 《铸造技术》 20080615 翟春泉等 大型铝铸件砂型低压铸造技术 第29卷, 第06期 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179498A (en) * | 2011-06-21 | 2011-09-14 | 海门市沪海有色铸造有限公司 | Energy-saving device of liquid rising pipe of low-pressure casting machine |
| CN103862021A (en) * | 2012-12-18 | 2014-06-18 | 侯伟 | Dual-layer sealing furnace cover for low-pressure casting |
| CN103409641A (en) * | 2013-07-16 | 2013-11-27 | 辽宁科技大学 | Plugging method for bottom water tank and crystallizer during stripping electroslag re-melting |
| CN105442050A (en) * | 2015-12-29 | 2016-03-30 | 湖南顶立科技有限公司 | Material container applicable to ingot furnace |
| CN110883326A (en) * | 2019-11-25 | 2020-03-17 | 哈尔滨工业大学 | Automatic adjusting and sealing method for top-jacking riser tube differential pressure casting machine |
| CN110899663A (en) * | 2019-11-25 | 2020-03-24 | 哈尔滨工业大学 | Automatic adjusting and sealing mechanism for top liquid lifting pipe of anti-gravity casting machine |
| CN113503778A (en) * | 2021-06-28 | 2021-10-15 | 上海机电工程研究所 | Foamed aluminum bonding device and using method thereof |
| CN113503778B (en) * | 2021-06-28 | 2022-12-13 | 上海机电工程研究所 | Foamed aluminum bonding device and using method thereof |
| CN114888239A (en) * | 2022-05-18 | 2022-08-12 | 上海交通大学 | Connecting sealing structure for antigravity precision casting and antigravity casting equipment |
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Application publication date: 20100714 |