US20060011322A1 - Installation for filling a mould with liquid metal and process employing this installation - Google Patents
Installation for filling a mould with liquid metal and process employing this installation Download PDFInfo
- Publication number
- US20060011322A1 US20060011322A1 US11/178,311 US17831105A US2006011322A1 US 20060011322 A1 US20060011322 A1 US 20060011322A1 US 17831105 A US17831105 A US 17831105A US 2006011322 A1 US2006011322 A1 US 2006011322A1
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- United States
- Prior art keywords
- impression
- installation
- mould
- liquid metal
- level
- 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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Classifications
-
- 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
-
- 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
- B22D2/003—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the level of the molten metal
Definitions
- the present invention relates to an installation for filling a mould with liquid metal, as well as to a process allowing this installation to be employed.
- each mould conventionally comprises a casting bowl intended to receive the molten metal, as well as at least one impression connected to this bowl via a feed channel.
- a casting bowl intended to receive the molten metal, as well as at least one impression connected to this bowl via a feed channel.
- This casting operation is subjected to several requirements.
- the flowrate of metal swallowed by the mould be permanently equal to the flowrate delivered by the casting machine, in order to avoid any overflow, as well as any under-feed.
- the level of metal in the bowl must be controlled in order that it fills the mould exactly, without, however, provoking any overflow.
- optical systems which employ a beam directed towards the casting bowl in order to determine the level of filling of the bowl during the casting.
- this known solution presents a drawback, connected in particular with its lack of knowledge of the real level of filling of the mould in the course of the casting process.
- the invention aims at proposing an installation for controlling the filling of a mould with liquid metal, reliably and precisely.
- the invention relates to an installation for filling a mould with liquid metal, comprising:
- the invention also relates to a process for employing the installation as defined hereinabove, comprising the following steps of:
- FIG. 1 is a general view illustrating an installation for filling a sand mould with liquid metal, according to the invention.
- FIG. 2 is a view similar to FIG. 1 , illustrating the installation of FIG. 1 during the phase of filling proper, and
- FIG. 3 is a graph representing the evolution of the level of molten metal as a function of time, inside an impression with which a mould equipping the installation of FIGS. 1 and 2 is provided.
- FIGS. 1 and 2 the installation of FIGS. 1 and 2 comprises different moulds, of which only one has been shown, given reference 2 .
- this mould circulates beneath a vessel 4 which is filled with a liquid molten metal 6 which is for example cast-iron or steel.
- This metal was poured in the vessel 4 in conventional manner via a ladle (not shown).
- the bottom of the vessel 4 is closed, in known manner, by a stopper 8 , also called stopple.
- the latter may be manoeuvred along its principal axis, namely vertically in FIG. 1 , via an actuator 9 of conventional type.
- Each mould which is of globally parallelepipedic shape, conventionally comprises a casting bowl 10 , of truncated shape, into which flows the molten metal 6 poured from the vessel 4 .
- This bowl 10 extends in a feed channel 12 which opens out into at least one impression 14 .
- two such impressions 14 are provided, which have been illustrated schematically.
- FIGS. 1 and 2 also comprises means for determining the evolution of the level of molten metal, inside the impression 14 . It is firstly question of three electromagnetic coils, mounted on the same axis, horizontal in the present case.
- a central emitter coil 16 is provided, adapted to be excited by a sinusoidal electric signal whose frequency is some kilohertz. To that end, the coil 16 is placed in relation with an appropriate generator 18 , of type known per se.
- the emitter coil is associated with two lateral, so-called receiver coils, of which one, 20 , is placed in the vicinity of the mould 2 .
- the other receiver coil 22 is placed opposite this mould 2 , with respect to the central emitter coil 16 .
- FIGS. 1 and 2 A single set of three coils has been shown in FIGS. 1 and 2 , to the right of the mould. It should be noted that another set of coils may optionally be provided in the vicinity of the other impression, namely to the left in these Figures.
- the coils may be placed above the mould, or in the vicinity of a corner thereof.
- the axis of these coils is respectively either vertical or oblique.
- FIGS. 1 and 2 where they are represented by broken lines.
- 24 denotes the lines of field which circulate in the vicinity of the first receiver coil 20 . As FIGS. 1 and 2 show, these lines 24 extend in part in a zone noted 24 ′, within the interior volume of the impression 14 . On the other hand, the lines of field 26 , extending in the vicinity of the other receiver coil 22 , namely opposite the coil 20 , do not interfere with the impression 14 .
- the three coils 16 , 20 and 22 are, furthermore, connected, via a line 28 , to an electronic unit 30 whose functions will be described hereinbelow. Finally, this unit 30 is connected, via a control line 32 , with the actuator 9 .
- the actuator 9 must firstly be manoeuvred in order to open the stopper 8 so as to admit molten metal into the casting bowl 10 . This molten metal then progressively fills the feed channel 12 , then penetrates inside the impressions 14 , as illustrated in FIG. 2 .
- the liquid metal is such as to disturb the electromagnetic field generated by the coils 16 , 20 and 22 , in particular in zone 24 ′ of the lines of field 24 .
- these lines of field which penetrate in part in the interior volume of the impression, are adapted to detect the presence of the molten metal in this impression.
- the intensity of the aforementioned disturbance increases as the impression 14 is filled.
- the electronic unit 30 is adapted to transform the value of the disturbance undergone by the lines of field 24 into an analog signal which corresponds for example to a variation of the voltage as a function of the real level of filling of the impression 14 .
- the value of this voltage is consequently representative, at each instant, of the level of metal in the impression.
- FIG. 3 is a graph illustrating this evolution of the voltage thus determined by the electronic unit 30 , as a function of time.
- a zone noted I is firstly observed, in which this voltage is zero, this corresponding to the absence of interference of the molten metal with the lines of field 24 . Then, from the instant when this interference begins to occur, the voltage increases with time, as the impression 14 is filled with the molten metal. This phase of rise of the level of this molten metal corresponds to zone II of this graph.
- this unit 30 controls the actuator 9 , via the line 32 . More precisely, if the instantaneous voltage is clearly greater than the reference voltage, at a given instant, the flowrate of molten metal poured from the vessel 4 must be reduced by lowering and even closing the stopper 8 . On the other hand, if this instantaneous voltage is clearly lower than the reference voltage, the stopper 8 should be raised in order to increase the flowrate of molten metal administered from this vessel 4 .
- the final phase of the casting of molten metal is effected in the following manner.
- the range and sensitivity of the sensor constituted by the three coils 16 , 20 and 22 may be adapted as a function of the characteristics of the mould. For example, if each of these coils is formed by 200 turns, which present a rectangular section of 140 mm by 110 mm and are separated from one another by a distance of 210 mm, the corresponding range of measurement inside the mould presents a depth of 300 mm over a surface of about 200 mm by 250 mm, centred on the coils.
- the arrangement of the three coils 16 , 20 and 22 is advantageous, since the receiver coils 20 and 22 are mounted in opposition, namely the coil 20 is adjacent the mould, while the coil 22 is thereopposite. In this way, only the lines of field 24 are disturbed when the metal rises, while those, 26 , do not undergo such a disturbance. Consequently, the electronic unit 30 benefits in manner known per se, from a regime of differential signals, thus allowing the sensitivity of the measurement to be increased.
- the invention makes it possible to attain the objects set forth hereinabove.
- the prior art employs an optical measurement in the casting bowl, which proves to be very poor in data since it is not representative of the level of molten metal in the impression.
- Such a measurement thus corresponds solely to the image of the difference between, on the one hand, the feed flowrate of the molten metal from the vessel 4 and, on the other hand, the instantaneous flowrate swallowed by the mould.
- the invention takes advantage of a means for detecting the level of the molten metal which is adapted to penetrate in the impression itself. Consequently, the invention gives a direct character to the measurement thus effected, this guaranteeing a possibility of monitoring the level of filling, during a large part of the filling process.
Abstract
The installation according to the invention comprises at least one mould, a vessel intended to receive the liquid metal and means for directly determining the evolution of the level of molten metal in the impression of the mould. These determination means comprise means for detecting the presence of this liquid metal in the impression, particularly of electromagnetic nature, which are adapted to penetrate at least partially in the interior volume of this impression.
Description
- The present invention relates to an installation for filling a mould with liquid metal, as well as to a process allowing this installation to be employed.
- In the technical domain of foundrywork, it is known to employ a succession of moulds, also called boxless moulds, which are made of sand. Each mould conventionally comprises a casting bowl intended to receive the molten metal, as well as at least one impression connected to this bowl via a feed channel. In service, it is question of displacing each mould in the direction of a casting machine adapted to pour molten metal.
- This casting operation is subjected to several requirements.
- Firstly, it is important to flood the casting bowl rapidly and to maintain it in the full state while the metal is propagating in the direction of the impressions. In effect, this ensures high-quality casting, bereft of voids, defects and trapped gas.
- It is also necessary that the flowrate of metal swallowed by the mould be permanently equal to the flowrate delivered by the casting machine, in order to avoid any overflow, as well as any under-feed. Finally, at the end of casting, the level of metal in the bowl must be controlled in order that it fills the mould exactly, without, however, provoking any overflow.
- It is firstly known to proceed with filling these moulds manually, namely this operation is carried out by an operator. It is also possible to carry out this filling automatically, so that it is piloted by programmable equipment.
- For example, optical systems are known which employ a beam directed towards the casting bowl in order to determine the level of filling of the bowl during the casting. However, this known solution presents a drawback, connected in particular with its lack of knowledge of the real level of filling of the mould in the course of the casting process.
- This being specified, the invention aims at proposing an installation for controlling the filling of a mould with liquid metal, reliably and precisely.
- To that end, the invention relates to an installation for filling a mould with liquid metal, comprising:
-
- at least one mould comprising a casting bowl, a feed channel, as well as at least one impression connected to said bowl by said channel,
- a vessel intended to receive the liquid metal having to be cast into the mould; and
- means for directly determining the evolution of the level of molten metal in the impression, these determination means comprising means for detecting the presence of this liquid metal in the impression, these detection means being adapted to penetrate at least partially in the interior volume of this impression.
- According to other characteristics of the invention:
-
- the detection means are of electromagnetic nature;
- the determination means comprise means for creating an electromagnetic field, of which lines of field form said detection means, these lines of field being able to be disturbed by the liquid metal present in the impression;
- the means for creating the electromagnetic field comprise at least one emitter coil, an electric generator adapted to excite this emitter coil, as well as at least one receiver coil adapted to cooperate with said emitter coil;
- two receiver coils are provided, a first receiver coil being placed between the emitter coil and the mould, while the other receiver coil is placed opposite the emitter coil with respect to the mould;
- the determination means also comprise means adapted to transform the intensity of the disturbance undergone by said lines of field into an analog signal representative of the evolution of the level of liquid metal in the impression, this analog signal corresponding for example to the evolution of a voltage as a function of the level of filling of the mould;
- the determination means also comprise means for obtaining an instantaneous curve, from said analog signal, representative of the evolution of the level of molten metal in the impression, as well as means for comparing this instantaneous curve with a reference curve, while means are, in addition, provided for controlling the flowrate of molten metal poured from the vessel, in the event of the instantaneous curve differing from the reference curve to an inadmissible extent;
- the control means are adapted to actuate a mobile stopper with which the vessel is equipped.
- The invention also relates to a process for employing the installation as defined hereinabove, comprising the following steps of:
-
- actuating the means for creating the electromagnetic field so as to generate lines of field penetrating at least partially in the interior volume of the impression; and
- determining the evolution of the level of liquid metal in the impression, as a function of the intensity of the disturbance undergone by these lines of field.
- According to other characteristics of the invention:
-
- said instantaneous curve and said reference curve are compared and the flowrate of liquid metal poured from the vessel is modified if the difference between this instantaneous curve and this reference curve is inadmissible;
- the flowrate of liquid metal is modified by displacing said stopper;
- a predetermined threshold of the impression is chosen, the instant is detected at which the level of liquid metal reaches this threshold, a latent period is allowed to lapse, depending in particular on the instantaneous value of the flowrate of molten metal poured from the vessel, and the admission of liquid metal in the mould is stopped at the end of this latent period.
- The invention will be described hereinafter with reference to the accompanying drawings, given solely by way of non-limiting example and in which:
-
FIG. 1 is a general view illustrating an installation for filling a sand mould with liquid metal, according to the invention. -
FIG. 2 is a view similar toFIG. 1 , illustrating the installation ofFIG. 1 during the phase of filling proper, and -
FIG. 3 is a graph representing the evolution of the level of molten metal as a function of time, inside an impression with which a mould equipping the installation ofFIGS. 1 and 2 is provided. - Referring now to the drawings, the installation of
FIGS. 1 and 2 comprises different moulds, of which only one has been shown, givenreference 2. In service, this mould circulates beneath a vessel 4 which is filled with a liquidmolten metal 6 which is for example cast-iron or steel. This metal was poured in the vessel 4 in conventional manner via a ladle (not shown). - The bottom of the vessel 4 is closed, in known manner, by a
stopper 8, also called stopple. The latter may be manoeuvred along its principal axis, namely vertically inFIG. 1 , via anactuator 9 of conventional type. - Each mould, which is of globally parallelepipedic shape, conventionally comprises a
casting bowl 10, of truncated shape, into which flows themolten metal 6 poured from the vessel 4. Thisbowl 10 extends in afeed channel 12 which opens out into at least oneimpression 14. In the example described and shown, twosuch impressions 14 are provided, which have been illustrated schematically. - The installation of
FIGS. 1 and 2 also comprises means for determining the evolution of the level of molten metal, inside theimpression 14. It is firstly question of three electromagnetic coils, mounted on the same axis, horizontal in the present case. - More precisely, a
central emitter coil 16 is provided, adapted to be excited by a sinusoidal electric signal whose frequency is some kilohertz. To that end, thecoil 16 is placed in relation with anappropriate generator 18, of type known per se. - The emitter coil is associated with two lateral, so-called receiver coils, of which one, 20, is placed in the vicinity of the
mould 2. On the other hand, theother receiver coil 22 is placed opposite thismould 2, with respect to thecentral emitter coil 16. - A single set of three coils has been shown in
FIGS. 1 and 2 , to the right of the mould. It should be noted that another set of coils may optionally be provided in the vicinity of the other impression, namely to the left in these Figures. - By way of additional variant, the coils may be placed above the mould, or in the vicinity of a corner thereof. In that case, the axis of these coils is respectively either vertical or oblique.
- When the
generator 18 feeds theemitter coil 16, an electromagnetic field is created, which circulates between thereceiver coils FIGS. 1 and 2 where they are represented by broken lines. - More precisely, 24 denotes the lines of field which circulate in the vicinity of the
first receiver coil 20. AsFIGS. 1 and 2 show, theselines 24 extend in part in a zone noted 24′, within the interior volume of theimpression 14. On the other hand, the lines offield 26, extending in the vicinity of theother receiver coil 22, namely opposite thecoil 20, do not interfere with theimpression 14. - The three coils 16, 20 and 22 are, furthermore, connected, via a
line 28, to anelectronic unit 30 whose functions will be described hereinbelow. Finally, thisunit 30 is connected, via acontrol line 32, with theactuator 9. - Functioning of the filling installation described hereinabove will now be explained in the following:
- The
actuator 9 must firstly be manoeuvred in order to open thestopper 8 so as to admit molten metal into thecasting bowl 10. This molten metal then progressively fills thefeed channel 12, then penetrates inside theimpressions 14, as illustrated inFIG. 2 . - It will be appreciated that, as it rises in the
impression 14, the liquid metal is such as to disturb the electromagnetic field generated by thecoils zone 24′ of the lines offield 24. Under these conditions, these lines of field, which penetrate in part in the interior volume of the impression, are adapted to detect the presence of the molten metal in this impression. - Furthermore, it is to be noted that the intensity of the aforementioned disturbance increases as the
impression 14 is filled. Under these conditions, theelectronic unit 30 is adapted to transform the value of the disturbance undergone by the lines offield 24 into an analog signal which corresponds for example to a variation of the voltage as a function of the real level of filling of theimpression 14. The value of this voltage is consequently representative, at each instant, of the level of metal in the impression. -
FIG. 3 is a graph illustrating this evolution of the voltage thus determined by theelectronic unit 30, as a function of time. A zone noted I is firstly observed, in which this voltage is zero, this corresponding to the absence of interference of the molten metal with the lines offield 24. Then, from the instant when this interference begins to occur, the voltage increases with time, as theimpression 14 is filled with the molten metal. This phase of rise of the level of this molten metal corresponds to zone II of this graph. - It should then be verified that the rise of the level of molten metal in the
impression 14 occurs at an acceptable speed. To that end, a previous phase of apprenticeship is effected, allowing access to a curve (not shown) figuring the evolution of the voltage as a function of the real level of filling of theimpression 14, during a so-called reference filling. - Then, if the
electronic unit 30 ascertains that the instantaneous evolution of the voltage differs in inacceptable manner from this reference curve, thisunit 30 controls theactuator 9, via theline 32. More precisely, if the instantaneous voltage is clearly greater than the reference voltage, at a given instant, the flowrate of molten metal poured from the vessel 4 must be reduced by lowering and even closing thestopper 8. On the other hand, if this instantaneous voltage is clearly lower than the reference voltage, thestopper 8 should be raised in order to increase the flowrate of molten metal administered from this vessel 4. - Furthermore, the final phase of the casting of molten metal is effected in the following manner. The instant at which the level of molten metal reaches a predetermined threshold of the impression, which is materialized by reference S visible in
FIG. 2 , should firstly be detected. It is appreciated that, at that instant, the voltage plotted onFIG. 3 attains a corresponding value, noted Vs. - Then a latent period is allowed to lapse, which depends on the instantaneous value of the flowrate of molten metal poured from the vessel 4. Finally, at the end of this period, the
electronic unit 30 controls theactuator 9 so as to provoke closure of thestopper 8, this stopping feed of molten metal. - It should be noted that the range and sensitivity of the sensor constituted by the three
coils - In addition, it will be noted that the arrangement of the three
coils coil 20 is adjacent the mould, while thecoil 22 is thereopposite. In this way, only the lines offield 24 are disturbed when the metal rises, while those, 26, do not undergo such a disturbance. Consequently, theelectronic unit 30 benefits in manner known per se, from a regime of differential signals, thus allowing the sensitivity of the measurement to be increased. - The invention makes it possible to attain the objects set forth hereinabove.
- In effect, the prior art employs an optical measurement in the casting bowl, which proves to be very poor in data since it is not representative of the level of molten metal in the impression. Such a measurement thus corresponds solely to the image of the difference between, on the one hand, the feed flowrate of the molten metal from the vessel 4 and, on the other hand, the instantaneous flowrate swallowed by the mould.
- On the other hand, the invention takes advantage of a means for detecting the level of the molten metal which is adapted to penetrate in the impression itself. Consequently, the invention gives a direct character to the measurement thus effected, this guaranteeing a possibility of monitoring the level of filling, during a large part of the filling process.
Claims (12)
1. Installation for filling a mould with liquid metal, comprising:
at least one mould comprising a casting bowl, a feed channel, as well as at least one impression connected to said bowl by said channel,
a vessel intended to receive the liquid metal having to be cast into the mould; and
means for directly determining the evolution of the level of molten metal in the impression, these determination means comprising means for detecting the presence of this liquid metal in the impression, these detection means being adapted to penetrate at least partially in the interior volume of this impression.
2. The installation of claim 1 , wherein the detection means are of electromagnetic nature.
3. The installation of claim 2 , wherein the determination means comprise means for creating an electromagnetic field, of which lines of field form said detection means, these lines of field being able to be disturbed by the liquid metal present in the impression.
4. The installation of claim 3 , wherein the means for creating the electromagnetic field comprise at least one emitter coil, an electric generator adapted to excite this emitter coil, as well as at least one receiver coil adapted to cooperate with said emitter coil.
5. The installation of claim 4 , wherein two receiver coils are provided, a first receiver coil being placed between the emitter coil and the mould, while the other receiver coil is placed opposite the emitter coil with respect to the mould.
6. The installation of claim 3 , wherein the determination means also comprise means adapted to transform the intensity of the disturbance undergone by said lines of field into an analog signal representative of the evolution of the level of liquid metal in the impression, this analog signal corresponding for example to the evolution of a voltage as a function of the level of filling of the mould.
7. The installation of claim 6 , wherein the determination means also comprise means for obtaining an instantaneous curve, from said analog signal, representative of the evolution of the level of molten metal in the impression, as well as means for comparing this instantaneous curve with a reference curve, while means are, in addition, provided for controlling the flowrate of molten metal poured from the vessel, in the event of the instantaneous curve differing from the reference curve to an inadmissible extent.
8. The installation of claim 7 , wherein the control means are adapted to actuate a mobile stopper with which the vessel is equipped.
9. Process for employing the installation of claim 3 , comprising the following steps of:
actuating the means for creating the electromagnetic field so as to generate lines of field penetrating at least partially in the interior volume of the impression; and
determining the evolution of the level of liquid metal in the impression, as a function of the intensity of the disturbance undergone by these lines of field.
10. The process of claim 9 , wherein said instantaneous curve and said reference curve are compared and the flowrate of liquid metal poured from the vessel is modified if the difference between this instantaneous curve and this reference curve is inadmissible.
11. The process of claim 10 , wherein the flowrate of liquid metal is modified by displacing said stopper.
12. The process of claim 9 , wherein a predetermined threshold of the impression is chosen, the instant is detected at which the level of liquid metal reaches this threshold, a latent period is allowed to lapse, depending in particular on the instantaneous value of the flowrate of molten metal poured from the vessel, and the admission of liquid metal in the mould is stopped at the end of this latent period.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0407823A FR2873050A1 (en) | 2004-07-13 | 2004-07-13 | FILLING INSTALLATION OF A MOLD WITH LIQUID METAL, AND METHOD FOR THE IMPLEMENTATION OF SAID INSTALLATION |
FR0407823 | 2004-07-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060011322A1 true US20060011322A1 (en) | 2006-01-19 |
Family
ID=34948218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/178,311 Abandoned US20060011322A1 (en) | 2004-07-13 | 2005-07-12 | Installation for filling a mould with liquid metal and process employing this installation |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060011322A1 (en) |
EP (1) | EP1616643A3 (en) |
CN (1) | CN1721105A (en) |
FR (1) | FR2873050A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090090482A1 (en) * | 2007-10-09 | 2009-04-09 | Foley Brian M | Non-invasive real-time level sensing and feedback system for the precision sand casting process |
EP2383056A1 (en) * | 2010-04-28 | 2011-11-02 | Nemak Dillingen GmbH | Method and apparatus for a non contact metal sensing device |
CN103542953A (en) * | 2013-09-30 | 2014-01-29 | 上海交通大学 | Measuring method for sand mold temperature field in sand casting of magnesium-alloy slab |
CN103871314A (en) * | 2014-04-08 | 2014-06-18 | 温州大学 | Classroom type casting system simulator |
CN105499495A (en) * | 2016-01-27 | 2016-04-20 | 娄底市现代精密铸造有限公司 | Dead-head-free sand mould casting technology and casting mould for ductile cast iron grinding disc |
Families Citing this family (4)
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CN105108122A (en) * | 2015-08-21 | 2015-12-02 | 张继兰 | Automatic casting mechanism capable of controlling flow rate |
CN105081254B (en) * | 2015-09-07 | 2017-09-26 | 苏州有色金属研究院有限公司 | The fluid level control device of crystallizer used in magnesium alloy semi-continuous casting |
DE102016112266A1 (en) * | 2016-07-05 | 2018-01-11 | Helmholtz-Zentrum Dresden - Rossendorf E.V. | Arrangement for characterizing the fill level of an electrically conductive material in a container |
CN108838337A (en) * | 2018-08-01 | 2018-11-20 | 宁国市挚友合金钢材料有限公司 | A kind of metalworking dies with casting height prompting function |
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US4441541A (en) * | 1981-03-18 | 1984-04-10 | Arbed S.A. | Method of and apparatus for determining the melt level in a continuous-casting mold |
US4865234A (en) * | 1987-03-26 | 1989-09-12 | Asea Brown Boveri Ab | Pouring control device |
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US3366873A (en) * | 1966-09-15 | 1968-01-30 | Atomic Energy Commission Usa | Linear responsive molten metal level detector |
DD142672A1 (en) * | 1979-04-10 | 1980-07-09 | Schinkel Hans Georg | METHOD OF GALVANIC FORMULATION DETECTION FOR CONTROLLING METAL CASTING PROCESSES |
IT1222337B (en) * | 1987-10-21 | 1990-09-05 | Ceda Costruzioni Elettromeccan | DEVICE FOR MEASURING THE LEVEL OF LIQUID METAL IN A CRYSTALLIZER FOR CONTINUOUS CASTING TIN |
JPH01266952A (en) * | 1988-04-18 | 1989-10-24 | Nkk Corp | Mold for continuous casting machine |
GB9817645D0 (en) * | 1998-08-14 | 1998-10-07 | Didier Werke Ag | Stopper |
-
2004
- 2004-07-13 FR FR0407823A patent/FR2873050A1/en not_active Withdrawn
-
2005
- 2005-07-12 EP EP05356118A patent/EP1616643A3/en not_active Withdrawn
- 2005-07-12 US US11/178,311 patent/US20060011322A1/en not_active Abandoned
- 2005-07-13 CN CNA2005100831858A patent/CN1721105A/en active Pending
Patent Citations (2)
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US4441541A (en) * | 1981-03-18 | 1984-04-10 | Arbed S.A. | Method of and apparatus for determining the melt level in a continuous-casting mold |
US4865234A (en) * | 1987-03-26 | 1989-09-12 | Asea Brown Boveri Ab | Pouring control device |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090090482A1 (en) * | 2007-10-09 | 2009-04-09 | Foley Brian M | Non-invasive real-time level sensing and feedback system for the precision sand casting process |
US7828043B2 (en) * | 2007-10-09 | 2010-11-09 | Gm Global Technology Operations, Inc. | Non-invasive real-time level sensing and feedback system for the precision sand casting process |
EP2383056A1 (en) * | 2010-04-28 | 2011-11-02 | Nemak Dillingen GmbH | Method and apparatus for a non contact metal sensing device |
CN102233410A (en) * | 2010-04-28 | 2011-11-09 | 内马克迪林根有限公司 | Method and apparatus for a non contact metal sensing device |
US20110273170A1 (en) * | 2010-04-28 | 2011-11-10 | Nemak Dillingen Gmbh | Method and Apparatus for a Non Contact Metal Sensing Device |
US8901930B2 (en) * | 2010-04-28 | 2014-12-02 | Nemak Dillingen Gmbh | Method and apparatus for a non contact metal sensing device |
CN103542953A (en) * | 2013-09-30 | 2014-01-29 | 上海交通大学 | Measuring method for sand mold temperature field in sand casting of magnesium-alloy slab |
CN103871314A (en) * | 2014-04-08 | 2014-06-18 | 温州大学 | Classroom type casting system simulator |
CN105499495A (en) * | 2016-01-27 | 2016-04-20 | 娄底市现代精密铸造有限公司 | Dead-head-free sand mould casting technology and casting mould for ductile cast iron grinding disc |
Also Published As
Publication number | Publication date |
---|---|
EP1616643A2 (en) | 2006-01-18 |
CN1721105A (en) | 2006-01-18 |
FR2873050A1 (en) | 2006-01-20 |
EP1616643A3 (en) | 2006-05-17 |
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