CN104259408A - Steel die casting speed indication method and device - Google Patents
Steel die casting speed indication method and device Download PDFInfo
- Publication number
- CN104259408A CN104259408A CN201410525323.2A CN201410525323A CN104259408A CN 104259408 A CN104259408 A CN 104259408A CN 201410525323 A CN201410525323 A CN 201410525323A CN 104259408 A CN104259408 A CN 104259408A
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- casting
- note
- data processor
- steel ladle
- poring rate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a steel die casting speed indication method and device which are used for indicating the casting speed of liquid steel flowing out of a water port of a steel ladle during die casting. The steel die casting speed indication device comprises a casting vehicle, an electronic weighing device, a data processor and a display. The casting vehicle is used for carrying the steel ladle for casting. The electronic weighing device is arranged on the casting vehicle at the position where the casting vehicle bears the steel ladle and can timely weigh the weight of the steel ladle and measure change data of the gross weight of the steel ladle along with time during casting. The data processor calculates the casting speed according to the change data of the gross weight of the steel ladle along with time obtained by the electronic weighing device. The display displays the casting speed calculated by the data processor. The steel die casting speed indication device can accurately control the casting speed, replaces operations according to experiences, improves accuracy and stability of casting process control, and removes influence of manual factors.
Description
The application be to application number be 201110444498.7, the applying date is on December 26th, 2011, denomination of invention is the punching block casting fast indicating means of note and the divisional application of the patent application of the fast indicating device of punching block casting note.
Technical field
The present invention relates to a kind of steel poring rate indicating means and steel poring rate indicating device, the punching block particularly used in die casting production process in a kind of field of metal casting technology casting fast indicating means of note and the fast indicating device of punching block casting note.
Background technology
Molten steel poring rate is a significant process parameter of die casting production process, directly affects the interior external quality of steel ingot.Poring rate is too fast, and will steel ingot inside be made to produce serious shrinkage cavity, segregation defects, and covering slag has little time fusing, cause lack of lubrication, Ingot Surface Quality be poor; Poring rate is excessively slow, and the duration of pouring will be made long, and molten steel inspiratory duration also extends, and increase the gas in steel and be mingled with, the most seriously the too low molten steel that causes of temperature can water out; Stable poring rate, can ensure that molten steel steadily rises in ingot mould, make ingot casting surface and internal soundness all good.
Because cast molten steel temperature is mostly at 1500 DEG C of temperature, close to setting temperature, its mobility is deteriorated, and it is large with ambient temperature gradient, heat loss is fast is also frozen into solid very soon, lose flowability, the steel Flow Velocity adopting the mode of traditional measurement liquid or gas flow rates to measure more than 1490 DEG C of temperature is impossible, therefore only has the speed (in this application referred to as note speed) adopting indirect method to carry out measuring high-temperature molten steel casting process.Existing molten steel note speed control method relies on the operating experience of watering steel workman completely, in steel pouring process, they rely on and observe steel stream, observe the speed that molten steel rising in mould etc. rule of thumb judges to note speed, finally record cast ingot body and cap mouth total rise time with stopwatch, rough judgement poring rate, although the method is simple, have the following disadvantages:
1, this method controlling note speed mainly leans on experience, affects greatly by human factor, and will have certain stage of fumbling after personnel's variation, and different people's summing up experience is different, therefore the Stability and veracity of this control method is poor.
2, have recorded total casting time, by calculating Mean Speed, because Sheng molten steel bucket and ingot casting are all variable cross-sections, cannot record or calculate instantaneous velocity in casting cycle, therefore the speed of the process note needed for process modification cannot be provided.
3, operator must detect by an unaided eye in casting process steel stream judge note speed speed; the lower edge space of protective casting cover must be strengthened, which increase the risk of high-temperature molten steel air-breathing, reduce molding casting effect; and the flue gas that oxidation produces increases, and is degrading working environment.
4, operator observes molten steel rising in mould, must climb on ingot mould top and see, and without load-bearing cover plate on ingot mould top, and in mould, be the steel of more than 1450 DEG C of temperature, there is very large potential safety hazard like this.
5, operator observes steel Flow Velocity, stares at high-temperature steel stream for a long time and sees, then high-temperature molten steel is launched very strong IR and then to be burnt human eye.
Summary of the invention
That is, in view of being a process constantly changed when steel stream flows out from the ladle bottom mouth of a river, traditional artificial experience control methods does not measure process beam speed at all, for technology controlling and process and cannot improve the Data support providing science.In order to make molten steel poring rate stability contorting within the limits prescribed, being used to guide and producing and optimize casting process, digitlization display must be carried out to this parameter of process note speed.
The object of the invention is to overcome above-mentioned technical problem, provide a kind of and can indicate the method and instrument of noting speed change by real-time tracking, the note that technical staff can be obtained in molten steel casting process is fast, for industrial analysis provides required technological parameter.
A side of the present invention provides a kind of punching block to cast the fast indicating device of note, and be used to indicate the poring rate of the molten steel flowed out from the mouth of a river of steel ladle in die casting process, this indicating device comprises: casting car, for loading the steel ladle will carrying out pouring into a mould; Electronic weigher, is arranged on the position of described casting car bearing described molten steel ladle weight, can weigh in real time to the weight of steel ladle, the gross weight recording steel ladle in casting process along with the delta data of time; Data processor, calculates poring rate according to the steel ladle gross weight from described electronic weigher along with the delta data of time; And display, show the poring rate that described data processor calculates.
In the fast indicating device of above-mentioned punching block casting note, preferably: described electronic weigher is arranged at the position that described casting car contacts with the gudgeon of described steel ladle.
In the fast indicating device of above-mentioned punching block casting note, preferably: described electronic weigher is built-in with data transmission module, and described data transmission module sends described delta data to described data processor by wireless or wired mode.
In the fast indicating device of above-mentioned punching block casting note, preferably also comprise: memory, the data measure described electronic weigher and the result of calculation of described data processor are stored.
In the fast indicating device of above-mentioned punching block casting note, preferred: the gross weight sample frequency that described electronic weigher measures described delta data is arranged by described display, the note speed display frequency adopted when described display shows described poring rate is identical or different from the described gross weight sample frequency of described electronic weigher.
In the fast indicating device of above-mentioned punching block casting note, preferably: described electronic weigher is LOAD CELLS, and described data processor is programmable logic controller (PLC).
In the fast indicating device of above-mentioned punching block casting note, preferably also be provided with: alarm, from described data processor described poring rate lower than lower critical value or higher than on critical value time report to the police, described upper and lower critical value can be arranged by described display.
Another aspect of the present invention provides a kind of punching block to cast the fast indicating means of note, be used to indicate the poring rate of the molten steel flowed out from the mouth of a river of steel ladle in die casting process, this indicating means comprises following step: lay step, and the steel ladle that will carry out pouring into a mould is placed into casting car; Weighing stage, utilizes the electronic weigher set by the position of bearing described molten steel ladle weight on described casting car, weighs in real time to the weight of steel ladle, the gross weight recording steel ladle in casting process along with the delta data of time; Calculation procedure, utilizes data processor to calculate poring rate according to the steel ladle gross weight from described electronic weigher along with the delta data of time; And step display, the poring rate calculated by described data processor display is over the display.
At the fast indicating means of above-mentioned punching block casting note, preferably: described electronic weigher is arranged on the position that described casting car contacts with the gudgeon of described steel ladle.
At the fast indicating means of above-mentioned punching block casting note, preferably: described electronic weigher sends described delta data to described data processor by wireless or wired mode.
At the fast indicating means of above-mentioned punching block casting note, preferably after described step display, also comprise: storing step, the data measure described electronic weigher and the result of calculation of described data processor are stored.
At the fast indicating means of above-mentioned punching block casting note, preferred: described electronic weigher measures described delta data with the gross weight sample frequency of regulation, described gross weight sample frequency is arranged by described display, and the note speed display frequency adopted when described display shows described poring rate is identical or different from the described gross weight sample frequency of described electronic weigher.
At the fast indicating means of above-mentioned punching block casting note, preferably: described electronic weigher is LOAD CELLS, and described data processor is programmable logic controller (PLC).
At the fast indicating means of above-mentioned punching block casting note, preferably also be provided with: alarming step, from described data processor described poring rate lower than lower critical value or higher than on critical value time report to the police, described upper and lower critical value can be arranged by described display.
Beneficial effect of the present invention
Adopt the fast indicating means of note of the present invention and the fast indicating device of note, solve the existing problems that the method for note speed exists that rule of thumb judge, obtain following technique effect
A, the poring rate of casting process can be shown intuitively, the poring rate change of casting process can be monitored continuously, and can save historical data, be convenient to later analysis sum up improve (namely preserve cast data so as to review in the future, analyze casting quality), do not need rule of thumb to operate, the Stability and veracity of process control is enhanced, and eliminates the impact of human factor.
B, in casting process because not needing operator to detect by an unaided eye steel stream; so the lower edge space of protective casting cover need not be strengthened; namely the lower edge space of protective casting cover can be reduced; even completely airtight; which reduce high-temperature molten steel air-breathing, add molding casting effect, and improve steel product quality; and the flue gas that oxidation produces is reduced, and improves the working environment of workers.
C, under process stabilizing condition, operator need not climb on ingot mould top and observe molten steel rising situation in mould, substantially increase safety coefficient, observing steel Flow Velocity because no longer needing operator to stare at high-temperature steel stream for a long time in addition, avoiding high-temperature molten steel and launching very strong IR and human eye of burning.
Accompanying drawing explanation
Fig. 1 is the structural representation that fast indicating device is noted in the die casting of the application.
Wherein, description of reference numerals is as follows:
1 steel ladle; 2 steel ladle hanger gudgeons; 3 electronic weighers (LOAD CELLS);
4 mouths of a river; 5 slide plates; 6 electric liquid oil cylinders;
7 ingot moulds; 8 casting cars; 9 data processors (PLC module);
10 displays; 12 memory devices (data storing computer).
Detailed description of the invention
In view of the impact by many factors such as mouth of a river temperature, molten steel temperature, the mouth of a river shapes when steel stream in casting process flows out from the mouth of a river of ladle bottom, traditional artificial experience control methods does not measure the concrete numerical value of the beam speed of casting process at all, can only roughly judge the speed of note speed by rule of thumb, the Data support of science cannot be provided for the control of technique and improvement, present inventor gropes through scene for many years, devises die casting and notes fast indicating device.
The primary structure formation that fast indicating device is noted in this die casting is described below.
Die casting is noted fast indicating device and is mainly comprised with lower member: steel ladle 1, casting car 8, electronic weigher 3, data processor 9, display 10, memory device 12.
When needs are poured into a mould, steel ladle 1 is transferred to by crane and can stably be placed on the casting car 8 of steel ladle 1, and this casting car 8 can regulate steel ladle 1 placed on it up and down.Due to certain adaptability to changes can be produced when steel ladle is rocked, the data influence measured the electronic weigher 3 mentioned below is larger, the weight data measured is made to fluctuate very large, make the and then fluctuation of follow-up a series of data simultaneously, therefore need to consider how to ensure system stability, guarantee that the data shown are accurately steady when actual design casting car 8.
Be provided with in casting car 8 and steel ladle hanger gudgeon 2 contact position of steel ladle 1 electronic weigher 3 (in fact electronic weigher 3 be arranged on car of casting bears molten steel ladle weight position just can), adopt electronic weigher 3 can real-time tracking ladle gross weight, along with molten steel is poured in ingot mould 7 from the mouth of a river 4 outflow of steel ladle 1, the weight of steel ladle 1 is in change, electronic weigher 3 is while weigh ladle gross weight, while by the ladle hair weight data that is weighed to corresponding time data by built-in data transmission module, wired or wireless mode is utilized to be delivered to data processor 9.As electronic weigher 3, can be such as LOAD CELLS, ladle gross weight signal be sent to data processor 9 by automatically.
The gross weight sampling period (gross weight sample frequency) of the hair weight data of electronic weigher 3 pairs of steel ladle 1 can be arranged as required, such as gathered a ladle gross weight every 10 seconds, also a ladle gross weight can be gathered every 0.1 second as required, due to the development of modern electronic technology, therefore meet arranging of the electronic circuit in regulation sampling period very easy.
Data processor 9 is according to the pour steel weight (poring rate gone out from the ladle hair weight data of electronic weigher 3 and corresponding Time Calculation in the unit interval, die casting can be called again and immediately note speed), in units of kg/min, such as calculate pour steel weight per minute, and result of calculation is transferred to display 10 and shows in real time, in addition, data processor 9 can also draw out poring rate along with the time change curve and be transferred to display 10 and shown.In addition, related data transmission can be stored by data processor 9 in relevant storage device (computer 12 in such as Fig. 1).Can be deleted by administrative staff during the overabundance of data stored in memory device 12 or automatically be deleted the data before stipulated time span such as two months.Data processor 9 can be PLC ((Programmable Logic Controller: programmable logic controller (PLC)).
In addition, the fast indicating device of note of the present invention can also arrange a warning device, such as respectively note speed lower than during a certain lower critical value and note speed (both can be audible alarm also can be, and lamp dodges reports to the police higher than giving the alarm during critical value on a certain, also can be any mode that other are expected), lower critical value such as gets 1800kg/min, upper critical value such as get 2300kg/min (respectively in corresponding diagram 1 note speed too low alarm settings, note fast too high alarm settings).The setting of critical value also can be determined according to technique needs, level of security by producers.
At the display screen (display) 10 included by the fast indicating device 1 of note of the present invention, it can be a kind of touch display screen, both can show die casting respectively on screen and immediately note speed, the gross weight sampling period, note speed display record, the gross weight sampling period of electronic weigher 3 can also be set by display screen, note fast too low alarm setting value, note fast too high alarm setting value, input the name (" heat (batch) number input " " recorder " namely in figure) of the current heat (batch) number poured into a mould and recorder, also the interface of carrying out heat (batch) number typing inquiry and/or heat (batch) number record queries can be shown on screen, once the selected heat (batch) number that will inquire about, the total data of the steel ladle pouring process of this heat (batch) number will be packed and is presented at below on the screen project data of only display regulation (also can), the data Replica that also can inquiry be obtained as required is in the file of specifying, for further industrial analysis.In addition, except display instant note speed value on screen, can also be the time according to abscissa, ordinate is the note speed change curve (this kind of display is than separately display instant note speed value is more vivid) that the mode of note speed shows in a period of time, multiple setting can be done as required in a word.
Fast note speed display frequency is noted in the die casting that screen shows immediately can be consistent with the gross weight sampling period (gross weight sample frequency), also can design in addition as required, such as refresh a screen display every two gross weight sampling periods, to avoid screen-refresh too fast not easily for field technician sees clearly.
Like this by gather steel ladle in die casting steel pouring process real-time weight signal and the duration of pouring signal, and convert thereof into " pour steel weight per minute " this significant process parameter, be used for guidance water steel workman control note speed (such as, water steel workman and can send slide plate keying control signal by data processor 9 to electric liquid oil cylinder 6 according to the result of calculation of data processor 9, control the slide plate 5 that ladle nozzle 4 place installs, the open degree at adjustment slide plate 5 pairs of mouths of a river 4, correspondingly control poring rate, adjust the molten steel speed be poured in ingot mould 7), these data in casting process also can be kept in computer 12 by data processor 9, inquiry is recalled when needing, analyze teeming speed situation in whole casting cycle.
Specific embodiment
Steel ladle 1 is placed on casting car 8, operating personnel load onto steel ladle sliding mechanism, hydraulic jack and protective cover, regulate steel ladle up and down, after good bag, carry out the baking of the relevant mouth of a river to prepare with mold, after the mouth of a river to be done baking prepares with mold, open die casting and note fast indicating device, steel ladle heat (batch) number to be cast and recorder is inputted by touch-screen, note speed sampling period and for after the data such as the lower critical value of alarm settings and upper critical value, press the button that instruction starts to pour into a mould, sent the slide plate 5 at the mouth of a river 4 place of opening steel ladle 1 to electric liquid oil cylinder 6 by data processor 9, molten steel is injected in ingot mould 7.In actual production, when just having started to pour into a mould, need first to adjust the open degree of the slide plate 5 at the mouth of a river 4 place, after steel stream size is adjusted to proper level, again adjust ladle, slowly slightly decline ladle, make under protective cover along fiberboard with
cast gate alms bowlsurrounding annulus blanket contacts, and realizes the cast of steel stream full guard.There is provided ladle real-time gross weight weight signal by the upper electronic weigher 3 installed of ladle barrow (pouring truck), be converted into PLC (the Programmable Logic Controller: programmable logic controller (PLC) of analog signals supply as data processor 9, intend the 6ES7315-2AG10-0AB0 adopting Siemens S7300 series), signal is through PLC process, obtain the real-time gross weight gravimetric value of ladle and teeming speed value, show the data that the various needs observations such as speed are noted in die casting immediately on display 10.
A special case of fast display record system is noted as die casting, PLC output signal can drive two 4 large LED numeral method to go out the real-time gross weight gravimetric value of ladle and actual teeming speed value (only show the latter on the display screen of Fig. 1, reality can show various data as required) through electronic circuit process.The upper software of WinCC installed by computer 12 as host computer, can record the historical data and curve that store the data such as the real-time gross weight gravimetric value of ladle and teeming speed value, and can preserve for a long time.In addition, in data processor 9, the data such as the real-time gross weight gravimetric value of ladle of each stove and teeming speed value EXCEL document can record preservation automatically, the data logging interval time (sampling period) also can revise as required, is convenient to technical staff and examines die casting and water steel operating procedure implementation status.Data processor 9 also monthly automatically can generate the EXCEL document file of a of that month die casting heat (batch) number and be transferred to computer 12 and stored, in order to recalling analyzing and processing in addition during needs.
Claims (10)
1. the fast indicating device of punching block casting note, be used to indicate the poring rate of the molten steel flowed out from the mouth of a river of steel ladle in die casting process, it is characterized in that, this indicating device comprises:
Casting car, for loading the steel ladle will carrying out pouring into a mould;
Electronic weigher, described electronic weigher is arranged at the position that described casting car contacts with the gudgeon of described steel ladle, can weigh in real time to the weight of steel ladle, the gross weight recording steel ladle in casting process along with the delta data of time;
Data processor, calculates poring rate according to the steel ladle gross weight from described electronic weigher along with the delta data of time;
Slide plate, is installed on the mouth of a river place of described steel ladle;
Electricity liquid oil cylinder, for adjusting the open degree of described slide plate to the described mouth of a river; With
Display, show the poring rate that described data processor calculates, and show the lower critical value of the poring rate preset and upper critical value, and send the fast signalization of note to described data processor, described data processor sends slide plate according to the poring rate that the fast signalization of described note and Practical Calculation go out to described electric liquid oil cylinder and opens and closes control signal, to adjust the open degree of described slide plate to the described mouth of a river, and then adjustment poring rate.
2. the fast indicating device of punching block casting note as claimed in claim 1, is characterized in that,
Described electronic weigher is built-in with data transmission module, and described data transmission module sends described delta data to described data processor by wireless or wired mode.
3. the fast indicating device of punching block casting note as claimed in claim 1, is characterized in that, also comprise:
Memory, the data measure described electronic weigher and the result of calculation of described data processor are stored.
4. the fast indicating device of punching block casting note as claimed in claim 1, is characterized in that,
The gross weight sample frequency that described electronic weigher measures described delta data is arranged by described display,
The note speed display frequency that described display adopts when showing described poring rate is identical or different from the described gross weight sample frequency of described electronic weigher.
5. the fast indicating device of punching block casting note as claimed in claim 1, is characterized in that,
Described electronic weigher is LOAD CELLS, and described data processor is programmable logic controller (PLC).
6. the fast indicating device of punching block casting note as claimed in claim 1, is characterized in that, be also provided with:
Alarm, from described data processor described poring rate lower than lower critical value or higher than on critical value time report to the police.
7. the fast indicating means of punching block casting note, be used to indicate the poring rate of the molten steel flowed out from the mouth of a river of steel ladle in die casting process, it is characterized in that, this indicating means comprises following step:
Lay step, the steel ladle that will carry out pouring into a mould is placed into casting car;
Weighing stage, utilizes the electronic weigher set by position contacted with the gudgeon of described steel ladle at described casting car, weighs in real time to the weight of steel ladle, the gross weight recording steel ladle in casting process along with the delta data of time;
Calculation procedure, utilizes data processor to calculate poring rate according to the steel ladle gross weight from described electronic weigher along with the delta data of time;
Step display, the poring rate calculated by described data processor and the lower critical value of poring rate preset and the display of upper critical value are over the display; With
The regulation and control step of molten steel poring rate, described data processor sends slide plate according to the poring rate that note speed signalization and the described data processor Practical Calculation from described display goes out to electric liquid oil cylinder and opens and closes control signal, be arranged on the open degree of the slide plate at described steel ladle mouth of a river place with adjustment, thus control poring rate.
8. the fast indicating means of punching block casting note as claimed in claim 7, is characterized in that,
Described electronic weigher sends described delta data to described data processor by wireless or wired mode.
9. the fast indicating means of punching block casting note as claimed in claim 7, is characterized in that,
After described step display, also comprise:
Storing step, the data measure described electronic weigher and the result of calculation of described data processor are stored.
10. the fast indicating means of punching block casting note as claimed in claim 7, is characterized in that,
Described electronic weigher measures described delta data with the gross weight sample frequency of regulation,
Described gross weight sample frequency is arranged by described display,
The note speed display frequency that described display adopts when showing described poring rate is identical or different from the described gross weight sample frequency of described electronic weigher,
Preferred: described electronic weigher is LOAD CELLS, described data processor is programmable logic controller (PLC).
Preferably also comprise: alarming step, from described data processor described poring rate lower than lower critical value or higher than on critical value time report to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410525323.2A CN104259408B (en) | 2011-12-26 | 2011-12-26 | Fast indicating means is infused in punching block casting and fast instruction device is infused in punching block casting |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104444987A CN102430725A (en) | 2011-12-26 | 2011-12-26 | Pouring speed indicating method and device for steel die casting |
| CN201410525323.2A CN104259408B (en) | 2011-12-26 | 2011-12-26 | Fast indicating means is infused in punching block casting and fast instruction device is infused in punching block casting |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104444987A Division CN102430725A (en) | 2011-12-26 | 2011-12-26 | Pouring speed indicating method and device for steel die casting |
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| CN104259408A true CN104259408A (en) | 2015-01-07 |
| CN104259408B CN104259408B (en) | 2018-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410525323.2A Active CN104259408B (en) | 2011-12-26 | 2011-12-26 | Fast indicating means is infused in punching block casting and fast instruction device is infused in punching block casting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106424609A (en) * | 2016-09-19 | 2017-02-22 | 天津瑞盈机电设备有限公司 | Iron liquid quality control system |
| CN106694863A (en) * | 2016-12-29 | 2017-05-24 | 中冶京诚工程技术有限公司 | Control method and device of molten steel pouring |
| CN111069578A (en) * | 2019-12-30 | 2020-04-28 | 马鞍山市星新机械材料有限公司 | Method for adjusting pouring speed of steel ladle |
| CN114226658A (en) * | 2021-11-23 | 2022-03-25 | 大冶特殊钢有限公司 | Injection method for die casting |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106424609A (en) * | 2016-09-19 | 2017-02-22 | 天津瑞盈机电设备有限公司 | Iron liquid quality control system |
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| CN111069578A (en) * | 2019-12-30 | 2020-04-28 | 马鞍山市星新机械材料有限公司 | Method for adjusting pouring speed of steel ladle |
| CN114226658A (en) * | 2021-11-23 | 2022-03-25 | 大冶特殊钢有限公司 | Injection method for die casting |
| CN114226658B (en) * | 2021-11-23 | 2023-03-24 | 大冶特殊钢有限公司 | Injection method for die casting |
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| CN104259408B (en) | 2018-12-28 |
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