CN114474310B - Crucible forming device - Google Patents
Crucible forming device Download PDFInfo
- Publication number
- CN114474310B CN114474310B CN202210247272.6A CN202210247272A CN114474310B CN 114474310 B CN114474310 B CN 114474310B CN 202210247272 A CN202210247272 A CN 202210247272A CN 114474310 B CN114474310 B CN 114474310B
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- China
- Prior art keywords
- crucible
- forming
- feeding
- section
- mold
- 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.)
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Links
- 230000007246 mechanism Effects 0.000 claims description 47
- 238000010926 purge Methods 0.000 claims description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 20
- 239000006004 Quartz sand Substances 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 10
- 230000003028 elevating effect Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000007493 shaping process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/20—Producing shaped prefabricated articles from the material by centrifugal or rotational casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The application discloses a crucible forming device, which comprises an automatic feeding module and an automatic forming module; the automatic forming module comprises a crucible die and is used for receiving the feeding of the automatic feeding module; the mold rotation driving part is arranged below the crucible mold, fixedly connected with the crucible mold and used for driving the crucible mold to rotate; the fixing frame is arranged above the crucible mold; the forming rod comprises a vertical fixing section and an arc forming section connected with the vertical fixing section, wherein the vertical fixing section is connected with the fixing frame, and the arc forming section is used for being arranged with the inner wall of the crucible die at a preset interval. The crucible forming device provided by the application can realize automatic operation of feeding stage and raw material forming, reduce labor cost, improve the consistency of crucible forming, improve crucible quality and improve production efficiency.
Description
Technical Field
The application relates to the field of crucibles, in particular to a crucible forming device.
Background
Quartz crucibles are a processing tool for the monocrystalline silicon industry. The typical method for manufacturing the quartz crucible is arc process: adding quartz sand into a forming die, uniformly paving the quartz sand on the inner wall of the forming die by using a forming rod 4, melting and forming the quartz sand by using heat generated by electrode arcing and heat release, taking out the die after forming, cooling, and performing post-processing to form a finished product. The process from adding quartz sand into a die to molding the die by using a molding rod always adopts manual operation, is greatly affected by the working state and experience of workers, has high strength, and has low production efficiency and difficult guarantee of product quality and consistency of products.
Disclosure of Invention
The application aims to provide a crucible forming device which can realize automatic operation of feeding stage and raw material forming, reduce labor cost, improve consistency of crucible forming, improve crucible quality and improve production efficiency.
In order to achieve the above object, the present application provides a crucible forming apparatus, including an automatic feeding module and an automatic forming module;
the automatic forming module comprises:
the crucible mold is used for receiving the feeding of the automatic feeding module;
the mold rotation driving part is arranged below the crucible mold, fixedly connected with the crucible mold and used for driving the crucible mold to rotate;
the fixing frame is arranged above the crucible mold;
the forming rod comprises a vertical fixing section and an arc forming section connected with the vertical fixing section, wherein the vertical fixing section is connected with the fixing frame, and the arc forming section is used for being arranged with the inner wall of the crucible die at a preset interval.
Optionally, the automated molding module further comprises a first lifting mechanism connected between the mount and the vertical mount section.
Optionally, the first lifting mechanism is slidably connected to the fixing frame, so as to be fixed after horizontally sliding along the fixing frame to adjust the position.
Optionally, the forming rod further comprises a connecting section connecting the end of the arc-shaped forming section and the middle part of the vertical fixing section.
Optionally, the automatic feeding module includes:
the bin is arranged above the fixing frame and used for storing quartz sand;
the feeding pipe is connected with the stock bin and used for conveying quartz sand into the crucible mold;
the control valve group is arranged on the feeding pipe and used for controlling the on-off of the feeding pipe;
the rotary material tray mechanism is fixedly connected to the fixing frame and arranged below a discharge hole of the material feeding pipe, so that the blanking of the material feeding pipe is uniformly scattered and is output along a preset direction.
Optionally, the rotary tray mechanism includes:
the rotating motor is vertically arranged and connected with the fixing frame;
a connecting shaft connected to the rotating electric machine;
the side part of the feeding disc is provided with an opening part facing the inner wall of the crucible die;
and the stirring impeller is arranged in the feeding tray and connected with the connecting shaft and is used for stirring and outputting quartz sand from the opening.
Optionally, the fixed plate is connected to the below of rotating electrical machines, throw the material pipe be fixed in the fixed plate, the connecting axle runs through the fixed plate sets up.
Optionally, a second lifting mechanism is arranged between the rotating motor and the fixing frame so as to drive the feeding disc to lift and feed.
Optionally, the control valve group comprises a manual control valve and an electric control valve which are arranged in series, a purging branch pipe is arranged on the feeding pipe between the manual control valve and the electric control valve, and the purging branch pipe is provided with a purging control valve.
Optionally, a purge mechanism is further included that connects the purge branch.
The crucible forming device provided by the application can cooperatively produce the crucible by utilizing the automatic feeding module and the automatic forming module; the automatic feeding module feeds materials into the crucible mold, the feeding materials are heated and melted in the crucible mold, meanwhile, the mold rotation driving part drives the mold to rotate, the forming rod fixed on the fixing frame is kept motionless, the scraping forming of the feeding materials of the arc forming section to the inner wall of the crucible mold is realized by means of the rotation of the crucible mold, the mechanical operation of two stages of feeding and forming is realized, only the fixing frame and the vertical fixing section are required to be adjusted, the relative position of the forming rod and the crucible mold is ensured, the operation can be repeated, the consistency of crucible forming is ensured, and the forming quality and the production efficiency of the crucible are improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a crucible forming apparatus according to the present application;
FIG. 2 is a schematic view of the feed tray and agitator impeller of FIG. 1;
FIG. 3 is a schematic view of the arrangement of the feed pipe and purge branch pipe.
Wherein:
the device comprises a 1-mould rotary driving part, a 2-crucible mould, a 3-fixing frame, a 4-forming rod, a 5-feeding tray, a 6-stirring impeller, a 7-connecting shaft, an 8-fixing plate, a 9-feeding pipe, a 10-rotary motor, an 11-first lifting mechanism, a 12-second lifting mechanism, a 13-storage bin, a 14-manual control valve, a 15-electric control valve, a 16-purging branch pipe and a 17-purging control valve.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The present application will be further described in detail below with reference to the drawings and detailed description for the purpose of enabling those skilled in the art to better understand the aspects of the present application.
Referring to fig. 1 to 3, fig. 1 is a schematic diagram of a crucible forming apparatus according to the present application; FIG. 2 is a schematic view of the feed tray and agitator impeller of FIG. 1; FIG. 3 is a schematic view of the arrangement of the feed pipe and purge branch pipe.
The application provides a crucible forming device which mainly comprises an automatic feeding module and an automatic forming module. The automatic feeding module is used for automatically feeding raw materials such as quartz sand, and the automatic forming module scrapes and forms the quartz sand through the crucible die 2, the die rotary driving part 1 and the forming rod 4.
Referring to fig. 1, in a specific embodiment provided by the present application, a mold rotation driving part 1 includes a motor and a turntable mechanism, a crucible mold 2 is fixed above the turntable mechanism and coaxially disposed with the motor and the turntable mechanism, and the motor is connected to and drives the turntable mechanism to rotate, thereby driving the crucible mold 2 to rotate around its rotation center. A fixing frame 3 is erected above the crucible mold 2, and a forming rod 4 is connected with the fixing frame 3 and extends into the crucible mold 2. The forming rod 4 has the main function of scraping and shaping quartz sand by virtue of the relative movement between the rotating crucible mold 2 and the inner wall of the crucible mold 2. The shaping stick 4 includes vertical fixed section and arc shaping section, vertical fixed section and the coincidence of the rotation center of crucible mould 2 set up, the top of vertical fixed section links firmly mount 3, the bottom of vertical fixed section extends to crucible mould 2 bottom, the shape of arc shaping section is fit with the cross-section profile of the inner wall of crucible mould 2, when so that shaping stick 4 overlaps with the rotation center of crucible mould 2, arc shaping section sets up with the settlement interval with the inner wall of crucible mould 2 exactly, form the annular space between arc shaping section and crucible mould 2 inner wall, quartz sand is finalized the design in the annular space region, so that follow-up heating melts quartz sand and forms quartz crucible.
In one embodiment, in order to avoid deformation of the forming bar 4 and to increase the rigidity of the forming bar 4, the forming bar 4 further comprises a connecting section connected at the top end of the arc-shaped forming section and in the middle of the vertical fixing section, the inherent shape of the arc-shaped forming section being maintained by the arrangement of the connecting section.
In an embodiment, the automatic forming module further comprises a first lifting mechanism 11, one end of the first lifting mechanism 11 is connected with the fixed frame 3, the other end of the first lifting mechanism is connected with the vertical fixed section of the forming rod 4, and the relative position of the forming rod 4 in the crucible mold 2 can be conveniently adjusted by utilizing the first lifting mechanism 11; it is equivalent that the first elevating mechanism 11 may employ a hydraulic cylinder or the like. Based on the above teachings, the fixed legs of the fixing frame 3 can also be arranged to be adjustable in elevation so as to adjust the height of the fixing frame 3 and change the relative position of the forming rod 4 in the crucible mold 2.
Further, the first lifting mechanism 11 and the fixed support are in a sliding connection mode so as to adjust the horizontal positions of the first lifting mechanism 11 and the forming rod 4 relative to the fixed frame 3 and the crucible mold 2, and the vertical fixed section of the forming rod 4 is kept to coincide with the rotation center of the crucible mold 2. The fixing frame 3 is horizontally provided with a guide rail/slide rail, the guide rail/slide rail is in sliding connection with a sliding block, the sliding block is provided with a locking mechanism, the first lifting mechanism 11 is connected to the bottom of the sliding block, and after the forming rod 4 is horizontally adjusted in place, the sliding block is locked relative to the guide rail/slide rail by the locking mechanism. The arrangement of the guide rail/slide rail and the slider with the locking mechanism can be referred to the prior art. The first lifting mechanism 11 and the sliding block can be fixed in a welding, bolting and other modes.
In the above embodiment, with continued reference to fig. 1, the automatic feeding module includes a bin 13, a feeding pipe 9, a control valve group and a rotary tray mechanism, where the bin 13 is arranged above the fixing frame 3 and is used for storing quartz sand raw materials; one end of the feeding pipe 9 is connected with a discharge hole of the stock bin 13, and the other end extends into the crucible mold 2; the control valve group is connected to the feeding pipe 9 and used for controlling the connection and disconnection of the feeding pipe 9; when the control valve bank switches the feeding pipe 9 to be conducted, quartz sand automatically flows to the feeding pipe 9 under the action of gravity and is conveyed into the crucible mold 2. The rotary tray mechanism is arranged below the discharge hole of the feeding pipe 9 and is used for receiving blanking and stirring and scattering the blanking and outputting the blanking along a preset direction. The bottom of the stock bin 13 is provided with a weighing mechanism so as to control the feeding amount of raw materials.
Referring to fig. 1 and 2, the rotary tray mechanism includes a rotary motor 10, a connecting shaft 7, a feeding tray 5 and a stirring impeller 6, the rotary motor 10 is vertically fixed on a fixed frame 3, one end of the connecting shaft 7 is connected with an output shaft of the rotary motor 10, the other end is connected with the stirring impeller 6, the stirring impeller 6 is positioned in the feeding tray 5, one side of the feeding tray 5 is provided with an opening part, the opening part is arranged towards the inner wall of a crucible mold 2, and the feeding tray 5 can be directly or indirectly fixed relative to the fixed frame 3 through a hanging rod and other mechanisms. The middle lower section of the feed pipe 9 is preferably a plastic pipe with flexible steel filaments. The fixed plate 8 is horizontally arranged below the rotating motor 10, the connecting shaft 7 penetrates through the fixed plate 8, the feeding pipe 9 penetrates through the fixed plate 8 and is fixed by the fixed plate 8, and the blanking port of the feeding pipe 9 is prevented from moving. The fixed plates 8 are oppositely arranged in parallel up and down, the fixed plate 8 on the upper layer is fixedly connected with the rotating motor 10, the fixed plate 8 on the lower layer is connected with the fixed plate 8 on the upper layer through a supporting rod, and the feeding tray 5 can be fixedly connected with the fixed plate 8 at the moment. In an embodiment, a second lifting mechanism 12 can be arranged between the rotary motor 10 and the fixed frame 3 according to the requirement, so that the feeding position of the feeding tray 5 can be adjusted by means of the second lifting mechanism 12 in the feeding process.
In an embodiment, the feeding pipe 9 is further provided with a purging branch pipe 16, and referring to fig. 3, the control valve set is matched with the manual control valve 14 and the electric control valve 15, the purging branch pipe 16 is extended between the electric control valve 15 and the feeding pipe 9 between the manual control valve 14, and the purging branch pipe 16 is provided with a purging control valve 17, so that after the feeding is finished, the purging control valve 17 is opened to purge and clean the feeding pipe 9 and the rotating tray mechanism, the purging branch pipe 16 is connected with a purging mechanism, and the purging mechanism can adopt a blower or a steam generating device, which is not limited herein. The weighing mechanism and the electric control valve 15 can be connected with the control module, so that the control module controls the electric control valve 15 to be turned off according to the feeding amount detected by the weighing mechanism after the single feeding reaches the set amount.
The working process of the crucible forming device is as follows:
the relative positions of the forming rod 4 and the crucible mold 2 are adjusted by means of a first lifting mechanism 11, the vertical fixed section is kept to coincide with the rotation center of the crucible mold 2, and the arc-shaped forming section and the inner wall of the crucible mold 2 are arranged at a set interval;
starting a mold rotation driving part 1 to drive a crucible mold 2 to rotate;
starting a rotating motor 10, opening a control valve group, conducting a feeding pipe 9, enabling quartz sand raw materials to fall into a feeding tray 5 under the action of gravity, enabling the rotating motor 10 to drive a stirring impeller 6 to rotate, and uniformly conveying the quartz sand raw materials from an opening part to the inner wall of a crucible mold 2 according to a required amount;
the position of the feeding tray 5 is adjusted by the second lifting mechanism 12 to realize more uniform feeding, so that the crucible forming time is shortened;
the crucible mold 2 rotates to rotate with quartz materials on the inner wall, the forming rod 4 scrapes materials which are more than the requirement of forming the side wall to the bottom, and the materials are distributed at the bottom according to the required arc shape under the action of a bottom forming device;
closing the control valve group of the feeding pipe 9 after the specified material usage amount is reached;
the materials to be molded are all ejected from the feeding tray 5, the operation of the rotating motor 10 is stopped, the materials are all molded in the crucible mold 2, and the molding rod 4 and the feeding tray 5 are lifted out from the crucible mold 2 through the first lifting mechanism 11 and the second lifting mechanism 12;
stopping the operation of the mold rotation driving part 1 and removing the crucible mold 2;
finally, the purging control valve 17 is opened, and the purging mechanism is started to purge the feeding pipe 9 and the feeding disc 5.
The crucible forming device provided by the application can reduce the labor cost, and does not need to weigh, feed and form manually; the closed system of the manual link of the material is reduced, and the material pollution caused by manual operation is avoided; the material is saved, the waste of the material during forming can be reduced, and the length of the cut part of the crucible can be reduced by the vertical up-and-down movement process control of the feeding pipe 9 and the feeding tray 5. And the mechanical feeding and forming are adopted, so that the manual operation error is reduced, and the consistency, the forming quality and the production efficiency of crucible forming are improved.
It should be noted that in this specification relational terms such as first and second are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The automatic crucible forming device provided by the application is described in detail above. The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.
Claims (4)
1. The crucible forming device is characterized by comprising an automatic feeding module and an automatic forming module;
the automatic forming module comprises:
the crucible mold is used for receiving the feeding of the automatic feeding module;
the mold rotation driving part is arranged below the crucible mold, fixedly connected with the crucible mold and used for driving the crucible mold to rotate;
the fixing frame is arranged above the crucible mold;
the forming rod comprises a vertical fixing section and an arc-shaped forming section connected with the vertical fixing section, the vertical fixing section is connected with the fixing frame, and the arc-shaped forming section is arranged at a preset interval with the inner wall of the crucible mold;
the automatic feeding module comprises:
the bin is arranged above the fixing frame and used for storing quartz sand;
the feeding pipe is connected with the stock bin and used for conveying quartz sand into the crucible mold;
the control valve group is arranged on the feeding pipe and used for controlling the on-off of the feeding pipe;
the rotary material disc mechanism is fixedly connected to the fixing frame and arranged below a discharge hole of the material feeding pipe so as to uniformly scatter the blanking of the material feeding pipe and output the blanking along a preset direction;
the control valve group comprises a manual control valve and an electric control valve which are arranged in series, a purging branch pipe is arranged on the feeding pipe between the manual control valve and the electric control valve, and the purging branch pipe is provided with a purging control valve;
the device also comprises a purging mechanism connected with the purging branch pipe;
the rotary tray mechanism includes:
the rotating motor is vertically arranged and connected with the fixing frame;
a connecting shaft connected to the rotating electric machine;
the side part of the feeding disc is provided with an opening part facing the inner wall of the crucible die;
the stirring impeller is arranged in the feeding tray and connected with the connecting shaft, and is used for stirring and outputting quartz sand from the opening part;
the lower part of the rotating motor is connected with a fixed plate, the feeding pipe is fixed on the fixed plate, and the connecting shaft penetrates through the fixed plate;
and a second lifting mechanism is arranged between the rotating motor and the fixing frame so as to drive the feeding disc to lift and feed.
2. The crucible forming apparatus of claim 1, wherein the automated forming module further comprises a first lifting mechanism coupled between the mount and the vertical mount section.
3. The crucible forming apparatus according to claim 2, wherein the first elevating mechanism is slidably connected to the fixing frame to be fixed after horizontally sliding the adjustment position along the fixing frame.
4. The crucible forming apparatus of claim 1, wherein the forming bar further includes a connecting section connecting the ends of the arcuate forming section and the middle of the vertical fixing section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210247272.6A CN114474310B (en) | 2022-03-14 | 2022-03-14 | Crucible forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210247272.6A CN114474310B (en) | 2022-03-14 | 2022-03-14 | Crucible forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114474310A CN114474310A (en) | 2022-05-13 |
| CN114474310B true CN114474310B (en) | 2023-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210247272.6A Active CN114474310B (en) | 2022-03-14 | 2022-03-14 | Crucible forming device |
Country Status (1)
| Country | Link |
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| CN (1) | CN114474310B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116177856A (en) * | 2022-12-06 | 2023-05-30 | 浙江美晶新材料股份有限公司 | A quartz crucible automatic feeding molding device |
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| CN211112082U (en) * | 2019-09-30 | 2020-07-28 | 日照钢铁控股集团有限公司 | Novel refining furnace blanking pipe anti-blocking device |
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2022
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| CN103145321A (en) * | 2011-12-06 | 2013-06-12 | 西安金诺光电科技有限公司 | Automatic molding system of quartz crucible blank |
| CN202356357U (en) * | 2011-12-12 | 2012-08-01 | 招远市玲珑橡胶助剂总厂 | Device for cleaning carbon black attached to wall |
| CN103922571A (en) * | 2014-03-28 | 2014-07-16 | 江苏华尔光电材料股份有限公司 | Quartz crucible forming device |
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| CN114474310A (en) | 2022-05-13 |
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