CN114888239A - Connecting sealing structure for antigravity precision casting and antigravity casting equipment - Google Patents
Connecting sealing structure for antigravity precision casting and antigravity casting equipment Download PDFInfo
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- CN114888239A CN114888239A CN202210550786.9A CN202210550786A CN114888239A CN 114888239 A CN114888239 A CN 114888239A CN 202210550786 A CN202210550786 A CN 202210550786A CN 114888239 A CN114888239 A CN 114888239A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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Abstract
The invention provides a connecting and sealing structure for antigravity precision casting and antigravity casting equipment, which are used for connecting and sealing the outlet end of a riser pipe and the inlet end of a formwork in the antigravity precision casting equipment. The antigravity casting equipment comprises the connecting and sealing structure for antigravity precision casting. According to the invention, through the two-stage wedge-shaped sealing structure, a good sealing effect of the riser tube and the formwork can be ensured, so that the production safety is improved.
Description
Technical Field
The invention relates to an assembly body connecting and sealing structure under the action of high temperature and high pressure, in particular to a connecting and sealing structure for antigravity precision casting and antigravity casting equipment.
Background
Counter-gravity precision casting is a method for making high-temperature molten metal flow against the gravity direction under the action of external pressure and filling and solidifying. The anti-gravity precision casting utilizes the process characteristic of external gas pressure, and requires that a closed system consisting of casting equipment, a riser tube and a mould shell has good sealing performance, so that high-pressure gas and high-temperature molten metal are prevented from leaking, and the safety and the reliability of casting production are ensured.
In the antigravity precision casting process, the riser tube and the formwork need to be preheated in advance. Due to furnace size limitations, it is common practice to preheat the riser tube and the mold shell separately and then install the riser tube and the mold shell separately into the casting apparatus. Therefore, the sealing effect between the riser tube and the formwork is a key factor influencing the smooth filling of the high-temperature molten metal, and the poor sealing performance not only can cause air leakage to cause deviation of a pressure curve, but also can cause waste products and even safety accidents due to leakage of the high-temperature molten metal.
At present, the alloy type suitable for antigravity precision casting is expanded from light alloys such as aluminum, magnesium and the like with low melting point and low density to nickel-based high-temperature alloys with high melting point and high density, which means the temperature rise and the increase of the acting pressure, the traditional sealing method can not meet the requirements of high-temperature and high-pressure working conditions, and innovative sealing technology is urgently needed to improve the sealing effect of a riser tube and a formwork.
Patent CN110899663A discloses a counter-gravity casting machine top formula stalk automatically regulated sealing mechanism, and this patent adopts the elastic potential energy that upper and lower jar of body closed back butterfly spring and stored, makes it have an ascending thrust action all the time to the stalk flange to shorten the distance of stalk and median septum, thereby overcome the sealed inefficacy problem of stalk that arouses because of the median septum warp. The patent CN109807307A discloses a sealing and fixing structure of a ceramic lift tube for antigravity casting, which invents a middle cover plate and a flange with tapers, wherein the taper structure strengthens the matching of the lift tube and a middle clapboard under the action of pressure, and a high-temperature resistant ceramic sealing gasket is used for strengthening sealing.
Both of the above two patents relate to a sealing structure of the lift tube and the middle partition plate, but both of the two structures cannot solve the sealing problem of the lift tube and the formwork.
Disclosure of Invention
Aiming at the defects of the existing riser tube and formwork sealing technology, the invention aims to provide a connecting sealing structure for antigravity precision casting and antigravity casting equipment.
According to one aspect of the invention, a connecting and sealing structure for antigravity precision casting is provided, which is used for connecting and sealing the outlet end of a riser pipe and the inlet end of a formwork in antigravity precision casting equipment, and comprises two wedge-shaped sealing structures, namely a primary wedge-shaped sealing structure and a secondary wedge-shaped sealing structure, which are arranged between the inlet end of the formwork and the outlet end of the riser pipe, wherein the primary wedge-shaped sealing structure and the secondary wedge-shaped sealing structure form concentric circles, and the secondary wedge-shaped sealing structure is positioned outside the primary wedge-shaped sealing structure.
Furthermore, the primary wedge-shaped sealing structure comprises a first wedge-shaped sealing gasket, a primary annular sealing boss arranged at the inlet end of the formwork and a primary annular sealing groove arranged at the outlet end of the riser pipe; the liquid lifting pipe is provided with a conical wall surface and a horizontal groove arranged around the outer side of the conical wall surface, the primary annular sealing groove is positioned on the conical wall surface of the liquid lifting pipe, and the primary annular sealing boss is matched with the primary annular sealing groove; the first wedge-shaped sealing gasket is located between the first-level annular sealing groove and the first-level annular sealing boss, a first wedge-shaped groove is formed in the first wedge-shaped sealing gasket along the circumferential direction, and the first-level annular sealing boss is embedded in the first wedge-shaped groove.
Further, the secondary wedge-shaped sealing structure comprises a second wedge-shaped sealing gasket, a secondary annular sealing boss arranged at the inlet end of the formwork and a secondary annular sealing groove arranged at the outlet end of the riser pipe; the secondary annular sealing groove is positioned in the horizontal groove of the liquid lifting pipe, and the secondary annular sealing boss is matched with the secondary annular sealing groove; the second wedge-shaped sealing gasket is located between the second-stage annular sealing groove and the second-stage annular sealing boss, a second wedge-shaped groove is formed in the second wedge-shaped sealing gasket along the circumferential direction, and the second-stage annular sealing boss is embedded in the second wedge-shaped groove.
Further, one-level annular seal boss with second grade annular seal boss is the structure that has the tapering, the tapering of one-level annular seal boss set up to with first wedge groove phase-match, the tapering of second grade annular seal boss set up to with second wedge groove phase-match.
Furthermore, the taper of the primary annular sealing boss is 3-5 degrees larger than that of the first wedge-shaped groove, and the taper of the secondary annular sealing boss is 3-5 degrees larger than that of the second wedge-shaped groove.
Further, the first wedge-shaped sealing gasket and the second wedge-shaped sealing gasket are made of any one of high-temperature resistant ceramic fibers, graphite and asbestos fibers.
Further, the connecting and sealing structure further comprises an annular boss arranged at the outlet end of the lift pipe, the annular boss is located on the radially outermost side of the lift pipe, and the annular boss is used for preventing molten metal from leaking outwards.
Furthermore, the inner side of the annular boss is provided with a groove for receiving molten metal.
Further, the connection sealing structure is configured to have the capabilities of high temperature resistance and high pressure resistance, wherein the high temperature resistance corresponds to a temperature of more than 800 ℃ and the high pressure resistance corresponds to a pressure of more than 0.1 MPa.
According to another aspect of the present invention, there is provided a countergravity casting apparatus comprising the above-described connecting seal structure for countergravity precision casting.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts two wedge-shaped sealing structures, the first-stage wedge-shaped sealing structure is slightly close to the high-temperature molten metal, the second-stage wedge-shaped sealing structure is slightly far away from the high-temperature molten metal, and the good sealing effect of the riser tube and the mould shell is ensured through the two-stage wedge-shaped sealing structures.
(2) According to the invention, the annular sealing boss is designed at the inlet end of the formwork, the annular sealing groove is designed at the outlet end of the riser pipe, and the wedge-shaped sealing gasket is adopted, so that a wedge-shaped sealing structure is formed when the riser pipe is connected with the formwork, thereby obtaining a sealing effect.
(3) According to the invention, the boss structure is arranged on the outer side of the secondary annular sealing groove at the outlet end of the liquid lifting pipe, and the groove structure is formed on the inner side of the boss, so that a small amount of high-temperature molten metal can be received, the leaked molten metal is prevented from damaging equipment, and the production safety is improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of an embodiment of the invention showing the integral assembly of a formwork and riser pipe;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic cross-sectional view of a lift tube in accordance with an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 2 at E;
FIG. 5 is a schematic view of the structure of a first wedge gasket in an embodiment of the invention;
FIG. 6 is an enlarged view of a portion of FIG. 2 at F;
FIG. 7 is a schematic diagram of a second wedge gasket in accordance with an embodiment of the present invention.
In the figure: the device comprises a shell, a lifting pipe, a first-stage wedge-shaped sealing structure, a second-stage wedge-shaped sealing structure, a first-stage annular sealing boss, a second-stage annular sealing boss, a first-stage annular sealing groove, a second-stage annular sealing groove, a ring boss, a first wedge-shaped sealing gasket, a first wedge-shaped groove, a second wedge-shaped sealing gasket, a second wedge-shaped groove and a second wedge-shaped groove, wherein the first wedge-shaped sealing gasket is 1, the second wedge-shaped groove is 1, the lifting pipe is 2, the first annular sealing gasket is 2-1, the second wedge-shaped sealing gasket is 4-1, and the second wedge-shaped groove is 4.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention. In the description of the embodiments of the present invention, it should be noted that the terms "first", "second", and the like in the description and the claims of the present invention and the drawings described above are used for distinguishing similar objects and not necessarily for describing a particular order or sequence. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
In the existing connection mode of the lift tube and the formwork, a layer of adhesive is coated at the connection position of the lift tube and the formwork, and the lift tube and the formwork are sealed by the adhesive. The method can basically ensure the sealing performance of the aluminum alloy and the magnesium alloy materials. The reason is that these materials have low casting temperatures (up to 700 ℃); the density is low (the density of the aluminum alloy is about 2700kg/m 3 ) Meaning that the required pressure is low (the aluminium magnesium alloy does not exert more than one third of the gas pressure of the nickel base alloy). While for nickel-based alloys, the casting temperature is about 1500 ℃ and the density of the nickel-based alloy is about 8100kg/m 3 Because of high temperature and high pressure, the method adopting the binder can not ensure the sealing requirement in the casting process of the nickel-based alloy, and the molten metal is easy to leak.
Accordingly, embodiments of the present invention provide a connecting and sealing structure for antigravity precision casting, which is used for connecting and sealing the outlet end 2 of a lift pipe and the inlet end 1 of a formwork in antigravity precision casting equipment, and referring to FIGS. 1 to 7, the connecting and sealing structure A of the formwork and the riser tube comprises two wedge-shaped sealing structures arranged between an inlet end 1 of the formwork and an outlet end 2 of the riser tube, namely a primary wedge-shaped sealing structure E and a secondary wedge-shaped sealing structure F, wherein the primary wedge-shaped sealing structure E and the secondary wedge-shaped sealing structure F form concentric circles, and the secondary wedge-shaped sealing structure F is positioned at the outer side of the primary wedge-shaped sealing structure E, namely, the primary wedge-shaped sealing structure is slightly close to the high-temperature molten metal and the secondary wedge-shaped sealing structure is slightly far from the high-temperature molten metal in the casting process, and the good sealing effect of the riser tube and the formwork is ensured through the two-stage wedge-shaped sealing structures.
The two-stage wedge-shaped sealing structure arranged between the lift pipe and the formwork in the embodiment of the invention has simple operation and convenient installation, the method adopting the binder in the prior art can not meet the sealing requirement under high temperature and high pressure, and the two-stage wedge-shaped sealing structure in the embodiment of the invention can also effectively ensure the sealing effect between the lift pipe and the formwork under the high-temperature working condition after the formwork and the lift pipe are preheated, thereby ensuring the production safety and the casting quality.
With continued reference to fig. 4, in some embodiments, the primary wedge-shaped sealing structure E includes a first wedge-shaped sealing gasket 3, a primary annular sealing boss 1-1 provided at the inlet end 1 of the formwork, and a primary annular sealing groove 2-1 provided at the outlet end 2 of the lift pipe, the lift pipe has a tapered wall surface and a horizontal groove provided around the outside of the tapered wall surface, the primary annular sealing groove 2-1 is located on the tapered wall surface of the lift pipe, and the primary annular sealing boss 1-1 is matched with the primary annular sealing groove 2-1; the first wedge-shaped sealing gasket 3 is positioned between the first-stage annular sealing groove 2-1 and the first-stage annular sealing boss 1-1, the first wedge-shaped sealing gasket 3 is provided with a first wedge-shaped groove 3-1 along the circumferential direction, and the first-stage annular sealing boss 1-1 is embedded in the first wedge-shaped groove 3-1 of the first wedge-shaped sealing gasket 3.
With continued reference to fig. 6, in some specific embodiments, the secondary wedge-shaped sealing structure F includes a second wedge-shaped sealing gasket 4, a secondary annular sealing boss 1-2 disposed at the inlet end 1 of the formwork, and a secondary annular sealing groove 2-2 disposed at the outlet end 2 of the lift pipe, the secondary annular sealing groove 2-2 is disposed in the horizontal groove of the lift pipe, the secondary annular sealing boss 1-2 is matched with the secondary annular sealing groove 2-2, the second wedge-shaped sealing gasket 4 is disposed between the secondary annular sealing groove 2-2 and the secondary annular sealing boss 1-2, the second wedge-shaped sealing gasket 4 is circumferentially provided with a second wedge-shaped groove 4-1, and the secondary annular sealing boss 1-2 is embedded in the second wedge-shaped groove 4-1 of the second wedge-shaped sealing gasket 4.
In some preferred embodiments, with continued reference to fig. 5 and 7, the first wedge-shaped gasket 3 is provided with a first wedge-shaped groove 3-1, the second wedge-shaped gasket 4 is provided with a second wedge-shaped groove 4-1, the primary annular sealing boss 1-1 is embedded in the first wedge-shaped groove 3-1, and the secondary annular sealing boss 1-2 is embedded in the second wedge-shaped groove 4-1. The first wedge-shaped sealing gasket 3 and the second wedge-shaped sealing gasket 4 are structurally characterized in that both have a wedge-shaped groove, and a wedge-shaped sealing structure is formed by embedding an annular sealing boss at the inlet end 1 of the formwork into the wedge-shaped groove of the sealing gasket, so that the sealing effect can be ensured.
In some preferred embodiments, the primary annular sealing boss 1-1 and the secondary annular sealing boss 1-2 are both tapered structures, the taper of the primary annular sealing boss 1-1 is configured to match the first wedge-shaped groove, and the taper of the secondary annular sealing boss 1-2 is configured to match the second wedge-shaped groove. In order to meet the requirement of tight fit between a sealing boss arranged on a mould shell and a wedge-shaped groove of a sealing gasket, the taper of a primary annular sealing boss 1-1 is 3-5 degrees larger than that of a first wedge-shaped groove 3-1, and the taper of a secondary annular sealing boss 1-2 is 3-5 degrees larger than that of a second wedge-shaped groove 4-1. Because two annular seal bosses all have tapering structural feature, when annular seal boss embedding sealed wedge groove, the tapering structure ensures that mould shell entry end 1 forms wedge seal with sealed the pad and stalk seal groove jointly, and the contact surface is closely laminated, guarantees the sealed effect of being connected of stalk and mould shell.
In some preferred embodiments, the material of the first wedge-shaped seal 3 and the second wedge-shaped seal 4 is selected from any one of high temperature resistant ceramic fibers, graphite, and asbestos fibers. In other embodiments, other materials can be used for the first wedge-shaped gasket 3 and the second wedge-shaped gasket 4, as long as the same function as in the embodiment of the present invention can be achieved.
In some preferred embodiments, the connecting and sealing structure further comprises an annular boss 2-3 provided at the outlet end 2 of the lift tube, the annular boss 2-3 being located at the radially outermost side of the lift tube, and the annular boss 2-3 being used for preventing molten metal from leaking out.
In some more preferred embodiments, the inner side of the annular boss 2-3, i.e. the side close to the conical wall surface of the lift tube, is provided with a groove for receiving molten metal, so that the molten metal is prevented from leaking out to damage the equipment, and the production safety is improved.
The connecting and sealing structure in the embodiment of the invention is suitable for connecting and sealing the outlet end 2 of the lift pipe and the inlet end 1 of the formwork in the casting process of anti-gravity precision casting equipment under the high-temperature and high-pressure conditions, and is constructed to have the capabilities of resisting high temperature and high pressure, wherein the temperature corresponding to the high temperature is more than 800 ℃, and the pressure corresponding to the high pressure is more than 0.1 MPa. In order to realize high temperature and high pressure resistance, the material of the liquid lifting pipe can be cast iron, cast steel or high temperature resistant ceramics.
Aiming at the sealing problem between the lift pipe and the formwork, the embodiment of the invention designs a two-stage wedge-shaped sealing structure at the connecting part of the lift pipe and the formwork and adopts a high-temperature-resistant sealing gasket, thereby improving the connecting and sealing effect of the lift pipe and the formwork, enabling the connecting position of the lift pipe and the formwork to bear the action of high temperature and high pressure, and ensuring the safety and reliability of casting production. And the assembly process of the preheated riser tube and the preheated formwork is simple to operate, saves time and improves production efficiency.
When the outlet end 2 of the riser pipe is assembled with the inlet end 1 of the formwork, a first wedge-shaped sealing gasket 3 and a second wedge-shaped sealing gasket 4 are respectively installed in two sealing grooves of the outlet end 2 of the riser pipe, and two annular sealing bosses of the inlet end 1 of the formwork are respectively embedded into the first wedge-shaped groove 3-1 and the second wedge-shaped groove 4-1, so that a two-stage wedge-shaped sealing structure is formed, and then the wedge-shaped sealing structure is compressed under the action of the fastening force of the formwork, so that the sealing effect is further improved. The invention can overcome the problem of poor connection tightness or sealing failure between the riser tube and the formwork in the antigravity precision casting, has simple operation and convenient installation, and further can ensure the safety and reliability of casting production.
It should be noted that in other embodiments, more than two stages of wedge-shaped sealing structures may be provided by using the same structural principle as in the embodiments of the present invention, and the more than two stages of wedge-shaped sealing structures are also within the protection scope of the present invention.
The embodiment of the invention also provides anti-gravity casting equipment which comprises the connecting and sealing structure for anti-gravity precision casting, wherein the connecting and sealing structure is connected through the secondary wedge of the lift pipe and the formwork, so that the operation is simple, the installation is convenient, the sealing effect between the lift pipe and the formwork can be effectively improved under the high-temperature working condition after the formwork and the lift pipe are preheated, and the production safety and the casting quality are ensured.
With continued reference to fig. 1 and 2, taking countergravity precision casting of a casting as an example, the concrete steps of connecting and sealing the outlet end of the lift tube and the inlet end of the formwork are as follows:
1) before the anti-gravity casting of a casting, firstly, respectively preheating a formwork and a riser tube to a set temperature of 1000 ℃ by using a well-type resistance heating furnace, and preserving heat for at least 120min to ensure that the formwork and the riser tube obtain uniform temperatures;
2) putting a proper amount of nickel-based superalloy K4169 ingot into a crucible, and heating and melting the ingot to 1520 ℃ through a vacuum melting furnace;
3) mounting the preheated and heat-insulated lift pipe to antigravity casting equipment;
4) respectively installing a first wedge-shaped sealing gasket 3 and a second wedge-shaped sealing gasket 4 in a primary annular sealing groove 2-1 and a primary annular sealing groove 2-2 of the riser pipe;
5) the preheated and heat-insulated mould shell is matched with a riser pipe to ensure that a primary annular sealing boss 1-1 and a secondary annular sealing boss 1-2 at the inlet end of the mould shell are respectively embedded into a first wedge-shaped groove 3-1 of a first wedge-shaped sealing gasket 3 and a second wedge-shaped groove 4-1 of a second wedge-shaped sealing gasket 4;
6) the mould shell is fixed, and the two-stage wedge-shaped sealing structure is compressed under the action of the fastening force, so that the sealing effect of the mould shell and the riser tube is ensured. After all the preparation work is finished, the antigravity pouring can be carried out. The good connection seal between the mould shell and the riser tube provides technical guarantee for preventing leakage and ensuring the quality of castings.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The above-described preferred features may be used in any combination without conflict with each other.
Claims (10)
1. The utility model provides a connection seal structure for antigravity precision casting for the connection seal of stalk outlet end and mould shell entry end in the antigravity precision casting equipment, its characterized in that, including locating the mould shell entry end with two wedge seal structure between the stalk outlet end are one-level wedge seal structure and second grade wedge seal structure respectively, one-level wedge seal structure with second grade wedge seal structure forms the concentric circles, just second grade wedge seal structure is located one-level wedge seal structure's the outside.
2. The connecting and sealing structure for antigravity precision casting according to claim 1, wherein the primary wedge-shaped sealing structure comprises a first wedge-shaped sealing gasket, a primary annular sealing boss arranged at the inlet end of the formwork, and a primary annular sealing groove arranged at the outlet end of the riser pipe;
the liquid lifting pipe is provided with a conical wall surface and a horizontal groove arranged around the outer side of the conical wall surface, the primary annular sealing groove is positioned on the conical wall surface of the liquid lifting pipe, and the primary annular sealing boss is matched with the primary annular sealing groove;
the first wedge-shaped sealing gasket is located between the first-level annular sealing groove and the first-level annular sealing boss, a first wedge-shaped groove is formed in the first wedge-shaped sealing gasket along the circumferential direction, and the first-level annular sealing boss is embedded in the first wedge-shaped groove.
3. The connecting and sealing structure for antigravity precision casting according to claim 2, wherein the secondary wedge-shaped sealing structure comprises a second wedge-shaped sealing gasket, a secondary annular sealing boss arranged at the inlet end of the formwork, and a secondary annular sealing groove arranged at the outlet end of the riser pipe;
the secondary annular sealing groove is positioned in the horizontal groove of the liquid lifting pipe, and the secondary annular sealing boss is matched with the secondary annular sealing groove;
the second wedge-shaped sealing gasket is located between the second-stage annular sealing groove and the second-stage annular sealing boss, a second wedge-shaped groove is formed in the second wedge-shaped sealing gasket along the circumferential direction, and the second-stage annular sealing boss is embedded in the second wedge-shaped groove.
4. The connection and seal structure for antigravity precision casting according to claim 3, wherein said primary annular seal boss and said secondary annular seal boss are both tapered structures, the taper of said primary annular seal boss being configured to match said first wedge-shaped groove, and the taper of said secondary annular seal boss being configured to match said second wedge-shaped groove.
5. The connection and seal structure for antigravity precision casting according to claim 4, wherein the taper of the primary annular seal boss is 3 to 5 ° greater than that of the first wedge-shaped groove, and the taper of the secondary annular seal boss is 3 to 5 ° greater than that of the second wedge-shaped groove.
6. The connecting and sealing structure for antigravity precision casting according to claim 3, wherein the material of the first wedge-shaped gasket and the second wedge-shaped gasket is selected from any one of high-temperature resistant ceramic fibers, graphite and asbestos fibers.
7. The connecting and sealing structure for antigravity precision casting according to claim 1, further comprising an annular projection provided at the outlet end of the lift tube, said annular projection being located at the radially outermost side of the lift tube, said annular projection being for preventing molten metal from leaking out.
8. The connecting and sealing structure for antigravity precision casting according to claim 7, wherein the inside of said annular boss is provided with a groove for receiving molten metal.
9. The connection seal structure for antigravity precision casting according to claim 1, characterized in that the connection seal structure is configured to have a capability of high temperature resistance and high pressure resistance, wherein the high temperature resistance corresponds to a temperature of more than 800 ℃ and the high pressure resistance corresponds to a pressure of more than 0.1 MPa.
10. Antigravity casting apparatus comprising the connecting seal structure for antigravity precision casting according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210550786.9A CN114888239B (en) | 2022-05-18 | 2022-05-18 | Connection sealing structure for antigravity precision casting and antigravity casting equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210550786.9A CN114888239B (en) | 2022-05-18 | 2022-05-18 | Connection sealing structure for antigravity precision casting and antigravity casting equipment |
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| CN114888239A true CN114888239A (en) | 2022-08-12 |
| CN114888239B CN114888239B (en) | 2023-05-19 |
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| CN202210550786.9A Active CN114888239B (en) | 2022-05-18 | 2022-05-18 | Connection sealing structure for antigravity precision casting and antigravity casting equipment |
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| RU2178849C1 (en) * | 2000-04-27 | 2002-01-27 | Акционерное общество открытого типа "Ленинградский Металлический завод" | Seal for high-temperature joint |
| CN2494717Y (en) * | 2001-08-31 | 2002-06-12 | 李书涵 | Continuous-casting ladle sealing device |
| CN201347816Y (en) * | 2008-12-29 | 2009-11-18 | 魏德普 | Novel valve sealing structure |
| CN101774008A (en) * | 2010-02-19 | 2010-07-14 | 南通爱尔思轻合金精密成型有限公司 | Sealing method used for low-pressure casting |
| CN105033399A (en) * | 2015-06-26 | 2015-11-11 | 郑英 | Protective gas heat treatment tank sealing structure capable of resisting cold and hot deformation through vacuumization |
| CN105945258A (en) * | 2016-06-03 | 2016-09-21 | 扬州峰明金属制品有限公司 | Low-pressure fusible mold precise casting process |
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2022
- 2022-05-18 CN CN202210550786.9A patent/CN114888239B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2178849C1 (en) * | 2000-04-27 | 2002-01-27 | Акционерное общество открытого типа "Ленинградский Металлический завод" | Seal for high-temperature joint |
| CN2494717Y (en) * | 2001-08-31 | 2002-06-12 | 李书涵 | Continuous-casting ladle sealing device |
| CN201347816Y (en) * | 2008-12-29 | 2009-11-18 | 魏德普 | Novel valve sealing structure |
| CN101774008A (en) * | 2010-02-19 | 2010-07-14 | 南通爱尔思轻合金精密成型有限公司 | Sealing method used for low-pressure casting |
| CN105033399A (en) * | 2015-06-26 | 2015-11-11 | 郑英 | Protective gas heat treatment tank sealing structure capable of resisting cold and hot deformation through vacuumization |
| CN105945258A (en) * | 2016-06-03 | 2016-09-21 | 扬州峰明金属制品有限公司 | Low-pressure fusible mold precise casting process |
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| CN114888239B (en) | 2023-05-19 |
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