CN218361993U - Novel filter equipment of die-casting high vacuum mold - Google Patents
Novel filter equipment of die-casting high vacuum mold Download PDFInfo
- Publication number
- CN218361993U CN218361993U CN202222048423.3U CN202222048423U CN218361993U CN 218361993 U CN218361993 U CN 218361993U CN 202222048423 U CN202222048423 U CN 202222048423U CN 218361993 U CN218361993 U CN 218361993U
- Authority
- CN
- China
- Prior art keywords
- filter
- vacuum
- die
- cylinder body
- connecting part
- 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.)
- Active
Links
Images
Abstract
The utility model relates to a novel filter device of a die-casting high vacuum die, which comprises an upper vacuum valve connector, an upper filter assembly, a lower vacuum valve connector and a quick-change hoop; the upper vacuum valve connector is connected with the top of the upper filtering component; the upper filtering component comprises an upper cylinder body of the vacuum-pumping filter, and the upper cylinder body of the vacuum-pumping filter is provided with a first connecting part; the lower filtering component comprises a lower cylinder body of the vacuum-pumping filter, and the lower cylinder body of the vacuum-pumping filter is provided with a second connecting part; the first connecting part is communicated with the second connecting part, and a main sealing ring is arranged between the first connecting part and the second connecting part; the lower vacuum valve connector is connected with the bottom of the lower filtering component; the quick-change hoop is connected with the first connecting part and the second connecting part. The utility model discloses can be effectual the sealing of each connecting piece of realization, and can change and clear up very conveniently to improve production efficiency and reduced maintenance duration, both guaranteed the leakproofness of filter, satisfy the high vacuum demand, improved production efficiency again.
Description
Technical Field
The utility model relates to a die-casting technical field especially relates to a novel filter equipment of die-casting high vacuum mold.
Background
Pressure casting, which is called die casting for short, is a casting forming method in which molten or semi-molten metal is poured into a die chamber of a die casting machine, a punch presses the metal into a die cavity at a very high speed, and then the metal is rapidly solidified and formed under the action of high pressure. The die-casting forming cycle is short, the production efficiency is high, but because the molten metal filling speed is high, gas in a die cavity cannot be discharged in time, and the interior of a casting can have air holes, so that the mechanical property and the interior quality of the casting are greatly influenced, and the application field of the die-casting is limited.
In order to avoid the defect of air holes in the casting, the air in the die cavity of the die is pumped out, and the die cavity is filled with molten metal in a vacuum state, namely, vacuum die casting is an effective solution. If the vacuum pressure in the mold cavity is kept below 5KPa, the process is called a high vacuum die casting process. The high vacuum die casting technology is an advanced special die casting process. And the high vacuum die casting has the same advantages as the common die casting method, but the internal quality and the mechanical property of the casting are greatly improved. The gas content of the high vacuum die casting is only 1-3 ml/100g, and T6 heat treatment and welding processing can be carried out. One of the key technologies of high vacuum die casting is a filtering device at the position of an exhaust block, and the device can separate aluminum powder at the position of a filter screen to keep a vacuum pipeline clean, so that the vacuum pumping effect can be guaranteed, the vacuum machine can be prevented from being polluted by the aluminum powder, and the service life of the vacuum machine is prolonged.
At present, filtering devices used at home and abroad (hereinafter, referred to as old filtering devices) are basically designed aiming at low-vacuum casting, and because the requirement on the air tightness of the low-vacuum casting is low, sealing rubber strips are rarely designed between the connecting positions of the old filtering devices, so that the sealing is insufficient, and the vacuumizing effect is influenced. In high vacuum die casting, when a vacuum system vacuumizes a pressure chamber and a mold cavity, external gas can enter the pressure chamber and the mold cavity through the gap, so that the defect of air holes is caused. Therefore, the sealing conditions of the old filter devices cannot be adapted to the requirements of high vacuum die casting. In addition, the structure of the old filtering device is special, the old filtering device can be detached only by using a special tool, the whole structure is complex, the cleaning difficulty is high, the wearing parts cannot be replaced, and manpower resources and production benefits are wasted for enterprises pursuing production benefits.
In order to solve the above problems, a novel filtering device for blocking aluminum powder for high vacuum die casting is needed to meet the requirements of high sealing performance and convenience in use for high vacuum die casting.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims to overcome the shortcoming and not enough among the prior art, provide a novel filter equipment of die-casting high vacuum mold.
A novel filter device for a die-casting high-vacuum die comprises an upper vacuum valve connector, an upper filter assembly, a lower vacuum valve connector and a quick-change hoop;
the upper vacuum valve connector is connected with the top of the upper filtering assembly; the upper filtering assembly comprises an upper cylinder body of the vacuum-pumping filter, and the upper cylinder body of the vacuum-pumping filter is provided with a first connecting part;
the lower filtering assembly comprises a lower vacuum-pumping filter cylinder body, and the lower vacuum-pumping filter cylinder body is provided with a second connecting part; the first connecting part is communicated with the second connecting part, and a main sealing ring is arranged between the first connecting part and the second connecting part;
the lower vacuum valve connector is connected with the bottom of the lower filtering assembly;
the quick-change hoop is connected with the first connecting portion and the second connecting portion.
A novel filter equipment of die-casting high vacuum mold, following beneficial effect has:
1) Aluminum powder can be prevented from entering a die-casting high-vacuum die, effective sealing of the connection position of the filtering device is guaranteed, and meanwhile the filtering device can be conveniently and quickly checked and cleaned so as to meet the requirements of high-vacuum die-casting and convenient use;
2) The upper cylinder body and the lower cylinder body of the vacuum-pumping filter are connected by using a quick-change hoop, and the structure can realize quick assembly and disassembly;
3) The internal structure is divided into an upper cylinder body and a lower cylinder body which are connected, when the feeding of the filtering device is blocked, the upper cylinder body and the lower cylinder body of the vacuum-pumping filter are detached and separated, and the accumulated materials can be easily cleaned and taken out;
4) Through setting up main sealing washer, can effectively improve filter equipment's leakproofness.
Furthermore, the first connecting part is provided with a pipe sleeve, and the main sealing ring is embedded on the top of the second connecting part; the pipe sleeve is inserted into the second connecting part; the quick-change hoop hoops the outer side surfaces of the first connecting part and the second connecting part.
The beneficial effects of adopting above-mentioned further scheme are that, first connecting portion set up in the pipe box inserts the second connecting portion, and the mode that the hole can be adopted to the second connecting portion cooperates with first connecting portion, more saves space to make main sealing washer seal first connecting portion and second connecting portion, guarantee filter equipment's leakproofness.
Furthermore, the upper filtering component also comprises a vacuumizing filtering upper cover, an upper cover filtering net and an upper cover sealing ring; the vacuumizing filter upper cover is connected with the vacuumizing filter upper cylinder body and is provided with a through hole communicated with the vacuumizing filter upper cylinder body; the upper vacuum valve connector is connected with the vacuumizing filtering upper cover; the upper cover filter screen and the upper cover sealing ring are arranged between the vacuumizing filter upper cover and the vacuumizing filter upper cylinder body.
Furthermore, the upper cover sealing ring and the upper cover filter screen are embedded on the top surface of the upper cylinder body of the vacuum-pumping filter; the upper cover sealing ring is positioned on the outer side of the upper cover filter screen.
Furthermore, the lower filter assembly also comprises a vacuumizing filter lower cover, a lower cover filter screen and a lower cover sealing ring; the vacuumizing filter lower cover is connected with the vacuumizing filter lower cylinder body and is provided with a through hole communicated with the vacuumizing filter lower cylinder body; the lower vacuum valve connector is connected with the vacuumizing and filtering lower cover; the lower cover filter screen and the lower cover sealing ring are arranged between the vacuumizing filter lower cover and the vacuumizing filter lower cylinder body.
Further, the lower cover sealing ring and the lower cover filter screen are embedded on the bottom surface of the lower cylinder body of the vacuum-pumping filter; the lower cover sealing ring is positioned on the outer side of the lower cover filter screen.
The vacuum pumping filter has the advantages that the upper vacuum pumping filter cover and the upper vacuum pumping filter cylinder body as well as the lower vacuum pumping filter cover and the lower vacuum pumping filter cylinder body are provided with the sealing rings for auxiliary connection, so that the gap between connecting pieces can be ensured, and the sealing performance of the connecting pieces can meet the use requirement of a high-vacuum die-casting process;
the upper cover filter screen and the lower cover filter screen are separately designed, and the aluminum powder can be effectively separated by filtering twice, so that the cleanness of the vacuum pipeline is ensured.
Further, the upper vacuumizing filter cover is connected with the upper vacuumizing filter cylinder body through a bolt; the vacuumizing filter lower cover is connected with the vacuumizing filter lower cylinder body through a bolt.
Adopt above-mentioned further scheme's beneficial effect to be, upper and lower cylinder body and vacuum filter upper and lower lid of evacuation filter are by screwed connection, and pan feeding or when damaged appear in filter equipment, only need pull down the screw and change damaged part, can realize quick restoration and use, improve production efficiency.
Furthermore, the grid density of the upper cover filter screen is greater than that of the lower cover filter screen.
The technical scheme has the advantages that the grid density of the upper cover filter screen is greater than that of the lower cover filter screen, so that aluminum powder and other impurities can stay between the upper cover filter screen and the lower cover filter screen, and subsequent dismantling and cleaning are facilitated.
Further, a first annular convex strip is arranged on the outer periphery of the bottom of the first connecting part, and a second annular convex strip is arranged on the outer periphery of the top of the second connecting part; the inner side surface of the quick-change hoop is provided with an annular groove, and the first annular raised line and the second annular raised line can be hooped by the annular groove.
The beneficial effect who adopts above-mentioned further scheme is, cramp first annular sand grip and second annular sand grip through the annular groove for first connecting portion and second connecting portion lean on quick change staple bolt zonulae occludens, are convenient for install and demolish.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of the novel filtering device of the die-casting high vacuum mold of the present invention;
fig. 2 is a schematic cross-sectional structure view of the novel filter device of the die-casting high vacuum mold of the present invention;
FIG. 3 is a schematic view of the internal structure of the novel filter device of the die-casting high vacuum mold of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
fig. 5 is a schematic structural view of the upper cylinder body of the vacuum filter of the present invention.
In the figure: 10. an upper vacuum valve connector; 21. the upper cylinder body of the vacuum-pumping filter; 211. a first connection portion; 2111. pipe sleeve; 2112. a first annular rib; 22. vacuumizing and filtering the upper cover; 221. a through hole; 222. bolt holes; 23. a filter screen is covered; 24. an upper cover sealing ring; 31. a lower cylinder body of the vacuum-pumping filter; 311. a second connecting portion; 3111. a second annular rib; 32. vacuumizing and filtering the lower cover; 33. a lower cover filter screen; 34. a lower cover sealing ring; 40. a lower vacuum valve connector; 50. a hoop is quickly replaced; 51. an annular groove; 60. a main seal ring.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be understood that in the description of the present application, the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present application. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, i.e. a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Further, unless otherwise specified, "a plurality" means two or more.
It should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "hollow" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
Referring to fig. 1 to 5, the novel filter device for a die-casting high vacuum mold of the present embodiment includes an upper vacuum valve connector 10, an upper filter assembly, a lower vacuum valve connector 40, and a quick-change anchor ear 50;
specifically, the upper vacuum valve connector 10 is connected with the top of the upper filtering assembly; the upper filtering component comprises an upper vacuum filter cylinder body 21, and the upper vacuum filter cylinder body 21 is provided with a first connecting part 211;
the lower filtering assembly comprises a lower vacuum filter cylinder 31, and the lower vacuum filter cylinder 31 is provided with a second connecting part 311; the first connecting part 211 is communicated with the second connecting part 311, and a main sealing ring 60 is arranged between the first connecting part 211 and the second connecting part 311;
the first connecting part 211 is provided with a pipe sleeve 2111, the main sealing ring 60 is embedded on the top of the second connecting part 311, and the pipe sleeve 2111 is inserted into the second connecting part 311;
specifically, the quick-change hoop 50 hoops the outer side surfaces of the first connecting portion 211 and the second connecting portion 311; preferably, a first annular protruding strip 2112 is provided on the outer periphery of the bottom of the first connecting portion 211, and a second annular protruding strip 3111 is provided on the outer periphery of the top of the second connecting portion 311; an annular groove 51 is formed in the inner side surface of the quick-change hoop 50, and the first annular convex strip 2112 and the second annular convex strip 3111 can be hooped by the annular groove 51; the first annular convex strip 2112 and the second annular convex strip 3111 are hooped by the annular groove 51, so that the first connecting part 211 and the second connecting part 311 are tightly connected by the quick-change hoop 50, and the installation and the removal are convenient;
specifically, the lower vacuum valve connector 40 is connected to the bottom of the lower filter assembly.
More specifically, the upper filter assembly further comprises a vacuumizing filter upper cover 22, an upper cover filter screen 23 and an upper cover sealing ring 24; the upper vacuumizing filter cover 22 is connected with the upper vacuumizing filter cylinder body 21, and the upper vacuumizing filter cover 22 is provided with a through hole 221 communicated with the upper vacuumizing filter cylinder body 21; the upper vacuum valve connector 10 is connected with the upper vacuumizing filter cover 22; the upper cover filter screen 23 and the upper cover sealing ring 24 are arranged between the vacuumizing filter upper cover 22 and the vacuumizing filter upper cylinder body 21;
the upper cover sealing ring 24 and the upper cover filter screen 23 are embedded on the surface of the top of the upper cylinder body 21 of the vacuum filter, and the upper cover sealing ring 24 can be embedded on the peripheral side surface of the top of the upper cylinder body 21 of the vacuum filter; the upper cover sealing ring 24 is positioned outside the upper cover filter screen 23.
More specifically, the lower filter assembly further comprises a vacuum pumping filter lower cover 32, a lower cover filter screen 33 and a lower cover sealing ring 34; the vacuum-pumping filter lower cover 32 is connected with the vacuum-pumping filter lower cylinder body 31, and the vacuum-pumping filter lower cover 32 is provided with a through hole 221 communicated with the vacuum-pumping filter lower cylinder body 31; the lower vacuum valve connector 40 is connected with the vacuum pumping filter lower cover 32; the lower cover filter screen 33 and the lower cover sealing ring 34 are arranged between the vacuum pumping filter lower cover 32 and the vacuum pumping filter lower cylinder body 31;
the lower cover sealing ring 34 and the lower cover filter screen 33 are embedded on the bottom surface of the lower cylinder body 31 of the vacuum-pumping filter; the lower cover sealing ring 34 is located outside the lower cover filter screen 33, and the specific settings of the lower cover filter screen 33 and the lower cover sealing ring 34 of the lower filter assembly can refer to the upper filter assembly, which is not described herein.
More specifically, the upper vacuum filter cover 22 is connected with the upper vacuum filter cylinder 21 through a bolt; the vacuum-pumping filter lower cover 32 is connected with the vacuum-pumping filter lower cylinder body 31 through a bolt; for example, the corresponding bolt holes 222 are provided on the upper vacuum filter cover 22 and the upper vacuum filter cylinder 21, and the corresponding bolt holes 222 are also provided on the lower vacuum filter cover 32 and the lower vacuum filter cylinder 31 for bolt connection; when pan feeding or when damaged appear in filter equipment, only need pull down the screw and change damaged part, can realize quick restoration and use, improve production efficiency.
In a preferred embodiment, the grid density of the upper cover filter screen 23 is greater than the grid density of the lower cover filter screen 33; the grid density of the upper cover filter screen 23 is greater than that of the lower cover filter screen 33, so that aluminum powder and other impurities can stay between the upper cover filter screen 23 and the lower cover filter screen 33, and subsequent dismantling and cleaning are facilitated.
Compared with the prior art, the utility model has the advantages that the sealing of each connecting piece is realized, and the connecting pieces can be conveniently replaced and cleaned, so that the production efficiency is improved, the maintenance time is reduced, the sealing performance of the filter is ensured, the high vacuum requirement is met, and the production efficiency is improved;
in the contrast of high vacuum mould vacuum inspection, under the unanimous condition of all conditions, only change the leakage numerical value that the filter valve contrasts two kinds of vacuum valves, old-fashioned filter valve leakage value is 65mbar, the utility model discloses a novel filter equipment of die-casting high vacuum mould's leakage value 38mbar, under the contrast, the leakage value has reduced 40%, proves sealed effect better than old-fashioned, can provide more stable production condition for high vacuum die-casting technology.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention.
Claims (9)
1. The utility model provides a novel filter equipment of die-casting high vacuum mold which characterized in that includes:
an upper vacuum valve connector;
the upper vacuum valve connector is connected with the top of the upper filtering component; the upper filtering component comprises an upper vacuum filter cylinder body, and the upper vacuum filter cylinder body is provided with a first connecting part;
the lower filtering assembly comprises a lower vacuum-pumping filter cylinder body, and the lower vacuum-pumping filter cylinder body is provided with a second connecting part; the first connecting part is communicated with the second connecting part, and a main sealing ring is arranged between the first connecting part and the second connecting part;
the lower vacuum valve connector is connected with the bottom of the lower filtering assembly;
and the quick-change hoop is connected with the first connecting part and the second connecting part.
2. The novel filter device for the die-casting high-vacuum die as claimed in claim 1, wherein the first connecting part is provided with a pipe sleeve, the main sealing ring is embedded on the top of the second connecting part, and the pipe sleeve is inserted into the second connecting part; the quick-change hoop hoops the outer side surfaces of the first connecting portion and the second connecting portion.
3. The novel filter device for the die-casting high-vacuum die as claimed in claim 2, wherein the upper filter assembly further comprises a vacuum-pumping filter upper cover, an upper cover filter screen and an upper cover sealing ring; the vacuumizing filter upper cover is connected with the vacuumizing filter upper cylinder body and is provided with a through hole communicated with the vacuumizing filter upper cylinder body; the upper vacuum valve connector is connected with the vacuumizing filtering upper cover; the upper cover filter screen and the upper cover sealing ring are arranged between the vacuumizing filter upper cover and the vacuumizing filter upper cylinder body.
4. The novel filter device for the die-casting high-vacuum die as claimed in claim 3, wherein the upper cover sealing ring and the upper cover filter screen are embedded on the top surface of the upper cylinder body of the vacuum filter; the upper cover sealing ring is positioned on the outer side of the upper cover filter screen.
5. The novel filter device for die-casting high vacuum molds as claimed in claim 4, wherein the lower filter assembly further comprises a vacuum pumping filter lower cover, a lower cover filter screen and a lower cover sealing ring; the vacuumizing and filtering lower cover is connected with the vacuumizing and filtering lower cylinder body and is provided with a through hole communicated with the vacuumizing and filtering lower cylinder body; the lower vacuum valve connector is connected with the vacuumizing and filtering lower cover; the lower cover filter screen and the lower cover sealing ring are arranged between the vacuumizing filter lower cover and the vacuumizing filter lower cylinder body.
6. The novel filter device for the die-casting high-vacuum die as claimed in claim 5, wherein the lower cover sealing ring and the lower cover filter screen are embedded in the bottom surface of the lower cylinder body of the vacuum filter; the lower cover sealing ring is positioned on the outer side of the lower cover filter screen.
7. The novel filter device for the die-casting high-vacuum die as claimed in claim 6, wherein the upper vacuumizing filter cover is connected with the upper vacuumizing filter cylinder body through a bolt; the vacuumizing filter lower cover is connected with the vacuumizing filter lower cylinder body through a bolt.
8. The novel filter device of die-casting high vacuum die as claimed in claim 6, wherein the mesh density of the upper cover filter screen is greater than the mesh density of the lower cover filter screen.
9. The novel filter device for the die-casting high-vacuum die as claimed in claim 1, wherein a first annular rib is arranged on the outer peripheral side of the bottom of the first connecting part, and a second annular rib is arranged on the outer peripheral side of the top of the second connecting part; the inner side surface of the quick-change hoop is provided with an annular groove, and the first annular raised line and the second annular raised line can be hooped by the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222048423.3U CN218361993U (en) | 2022-08-04 | 2022-08-04 | Novel filter equipment of die-casting high vacuum mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222048423.3U CN218361993U (en) | 2022-08-04 | 2022-08-04 | Novel filter equipment of die-casting high vacuum mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218361993U true CN218361993U (en) | 2023-01-24 |
Family
ID=84965679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222048423.3U Active CN218361993U (en) | 2022-08-04 | 2022-08-04 | Novel filter equipment of die-casting high vacuum mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218361993U (en) |
-
2022
- 2022-08-04 CN CN202222048423.3U patent/CN218361993U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104388983B (en) | Electrolytic cell for recycling aluminum | |
| CN218361993U (en) | Novel filter equipment of die-casting high vacuum mold | |
| CN108838368A (en) | A kind of vacuum suction device of die casting | |
| CN201896653U (en) | Splash-proof air valve of urea box | |
| CN207787669U (en) | Thin-wall part vacuum die-casting mould | |
| CN218902668U (en) | Novel separation aluminum powder filtering device suitable for high-vacuum die casting | |
| CN214300290U (en) | Gas protection device in electroslag remelting refining process | |
| CN212188284U (en) | Novel pipeline filter | |
| CN207012692U (en) | A kind of gas cleaning plant for casting metals lithium glove box | |
| CN208419593U (en) | A kind of anti-oxidation melting appartus of metal | |
| CN219827065U (en) | Large-scale integrated battery box frame vacuumizing system | |
| CN212091413U (en) | Efficient laminated waste gas filter | |
| CN208407872U (en) | A kind of device for cleaning mould | |
| CN216801600U (en) | Reliable vacuum casting box body of lost foam | |
| CN205437087U (en) | Vacuum die casting system | |
| CN214294299U (en) | Double-cylinder mold opening device of injection molding machine | |
| CN211611796U (en) | External pipe water inlet cover convenient to detach for cooling tower | |
| CN211516004U (en) | Sand box for casting assembled speed reducer box body | |
| CN214032747U (en) | Rotary plate valve with purging gas circuit structure and feeding cleaning system | |
| CN110052592A (en) | Thin-wall part vacuum die-casting mould | |
| CN217666341U (en) | Textile casting mold convenient for mold closing | |
| CN218207828U (en) | Lift valve for industrial waste gas treatment with good air tightness | |
| CN218991833U (en) | Air compressor | |
| CN211030572U (en) | A leak protection sand vacuum negative pressure insulation can for production of α - β brick | |
| CN210254173U (en) | Silicon-manganese alloy casting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |