US20100044000A1 - Method and control device for controlling the heat removal from a side plate of a mold - Google Patents
Method and control device for controlling the heat removal from a side plate of a mold Download PDFInfo
- Publication number
- US20100044000A1 US20100044000A1 US12/312,014 US31201407A US2010044000A1 US 20100044000 A1 US20100044000 A1 US 20100044000A1 US 31201407 A US31201407 A US 31201407A US 2010044000 A1 US2010044000 A1 US 2010044000A1
- Authority
- US
- United States
- Prior art keywords
- heat dissipation
- dot over
- coolant
- side plate
- actual
- 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.)
- Abandoned
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
Definitions
- the invention concerns a method and a control device for automatically controlling the heat dissipation of a side plate of a mold in a continuous casting installation for casting metal in slabs, thin slabs, blooms, billets, or preliminary sections.
- the method of the invention is preferably used in standard slab casting installations and molds, which are operated at a much lower casting speed than thin-slab casting installations.
- a method for controlling the heat dissipation in a side plate of a mold is known, for example, from European Patent EP 1 070 560 B1, in which the specific heat dissipation, also known as heat flux density, is controlled in a wide-side plate by suitable variation of the flow rate of the cooling water through the wide-side plate. The control occurs according to the thickness of the side plate, which is made of copper.
- a definite threshold value for the heat flux density is defined as a function of the grade of steel that is to be cast and of the casting flux that is used. This prior art is aimed solely at limiting the heat dissipation of the during the relatively short start-up period in a thin-slab installation with high casting speed.
- the objective of the invention is to provide a method and a control device for automatically controlling the heat dissipation in a side plate of a mold, which are characterized by automatic adaptation to a current or changed state of the side plates, especially during a steady-state casting operation.
- the cooling behavior of a mold and especially its side plates is a critical factor in determining the quality of the cast metal.
- the claimed method offers the great advantage over the prior art that it does not require the coolant circulation and especially the amount of coolant to be adapted or adjusted to the material, the thickness or the coating of a specifically used side plate, or its altered setting during a steady-state casting operation. In this respect, the claimed method and the claimed control of the heat dissipation automatically adapt to the given current state of the side plate used.
- Another advantage is that the claimed control system does not require any presetting in regard to the particular grade of steel that is being cast.
- An advantage of the claimed method is that it makes it possible to adjust the cooling behavior of the side plate and thus the quality of the cast metal as a function of only a single variable to be preset, namely, the quantity of heat to be dissipated.
- the method of the invention advantageously provides either automatic control of the specific heat dissipation (with respect to the active cooling surface of the side plate) or automatic control of the absolute heat dissipation (without reference to the active cooling surface of the side plate).
- the measured values entering into the computation of the actual value for the heat dissipation for example, the temperature of the coolant at the coolant inlet and outlet of the side plate and, optionally, the volume flow rate of coolant through the side plate, are advantageously averaged or filtered or buffered before they are introduced into the computation of the actual value for the heat dissipation.
- This has the advantage that the dynamic properties/components of the measured actual values are adapted to the, by comparison, relatively slow control of the heat dissipation by variations of the volume flow rate of the coolant.
- control of the heat dissipation on the narrow side of a mold in accordance with the method of the invention offers the advantage that the control also automatically adapts to states specific to the narrow side and automatically simultaneously compensates effects on the casting process caused by their variation. For example, changed settings in the width and/or the conicity of the side plate during the casting operation are automatically simultaneously compensated by the claimed method during the automatic control of the heat dissipation, without it being necessary to determine these states separately and then to supply them to the control device.
- Simultaneous application of the method of the invention to two or more side plates of the mold guarantees that the heat dissipation is separately controlled for each of the side plates, but at the same time it advantageously allows the adjustment of a desired ratio for the heat dissipation values between the individual side plates. Adjustment of the desired ratio can be easily realized by predetermining the set points for the heat dissipation values for the individual side plates in the desired way. For example, it can be desirable for the heat dissipation values in the two opposite narrow-side plates of a mold to be the same or for the heat dissipation of the two wide sides together to be in a definite ratio to the heat dissipation of the two narrow sides together.
- control device for automatically controlling the heat dissipation in a mold.
- the advantages of this control device are the same as the advantages specified above with reference to the method of the invention.
- the drawing shows first of all the circulation of a coolant 300 through the side plate 200 of a mold.
- the heat produced in the mold during the casting of a metal, especially a steel, is removed from the side plate by means of a coolant 300 , which passes through cooling channels or cooling bores (not shown) in the side plate 200 .
- the coolant is typically cooling water that has been treated with a corrosion inhibitor, with glycol, oils, or alcohol. Alternatively, activated water or distilled water can also be used.
- Each of these coolants is characterized by individual material constants, such as the specific gravity p or the specific heat at constant pressure cp.
- the now heated coolant 300 is cooled by passing it through a heat exchanger 400 , which is connected with a cooling tower. After it has been cooled, the coolant 300 is fed to a pump 600 , which is driven by a drive unit 650 .
- the pump 600 maintains the circulation of the coolant 300 and pumps the cooled coolant back through the cooling channels of the side plate 200 .
- the closed coolant circulation can have an expansion tank 700 (gas reservoir), especially for establishing a system pressure.
- a pump 600 in the system just serves for compensating drops caused by friction.
- the present invention concerns a method associated with the coolant circulation described above and an associated control device 100 for automatically controlling the heat dissipation ⁇ dot over (q) ⁇ of the side plate 200 during a steady-state casting operation to a possibly variably predetermined set point ⁇ dot over (q) ⁇ set .
- control device 100 of the invention comprises a computing unit 110 for computing an actual value ⁇ dot over (q) ⁇ actual for the heat dissipation.
- the computing unit 110 computes this actual value by the following physical formula:
- the computing unit 110 can be designed to compute the heat dissipation ⁇ dot over (q) ⁇ as a specific physical quantity, i.e., with reference to the active cooling surface of the side plate A, or as an absolute physical quantity, i.e., without reference to the active cooling surface A.
- the active surface is calculated as the active length of the side plate multiplied by the active width of the side plate or multiplied by the active thickness of the side plate.
- the density ⁇ of the coolant used in the computation of the actual value for the heat dissipation ⁇ dot over (q) ⁇ actual its specific heat c p , and the possibly used active surface are each suitably supplied in advance to the computing unit as constants.
- the temperatures T in and T out at the coolant inlet and coolant outlet of the side plate are each determined as current measured values; their difference d v is used as a factor of proportionality in the computation of the heat dissipation.
- the volume flow rate ⁇ dot over (V) ⁇ of the coolant per unit time through the side plate is supplied to the computing unit 110 as a current actual value. This can be accomplished either by making current measurements of the volume flow rate ⁇ dot over (V) ⁇ , as shown in the drawing, or by feeding it back to the computing unit 110 as a controlled variable from the output of the controller 130 , which is described below.
- control device 100 has an averaging unit 140 for averaging or buffering the measured actual values with respect to time, especially the measured temperature values, before they are supplied to the computing unit 110 .
- averaging unit 140 for averaging or buffering the measured actual values with respect to time, especially the measured temperature values, before they are supplied to the computing unit 110 .
- High-frequency spectral components and dynamic components in these measuring signals are filtered out by this averaging or buffering, and in this way these measuring signals are adapted to the otherwise rather slow control mechanism for the heat dissipation in the side plate 200 .
- the actual value for the heat dissipation ⁇ dot over (q) ⁇ actual produced by the computing unit 110 is supplied to a comparator 120 for computing a control deviation ⁇ dot over (q) ⁇ for the heat dissipation.
- the comparator 120 computes this control deviation by subtracting the supplied actual value for the heat dissipation ⁇ dot over (q) ⁇ actual from a possibly also variably preset set point for the heat dissipation ⁇ dot over (q) ⁇ set .
- control deviation ⁇ dot over (q) ⁇ is supplied to the controller 130 , which converts the current control deviation to a suitable variation of the volume flow rate ⁇ dot over (V) ⁇ of the coolant 300 through the mold 200 .
- This conversion is carried out in such a way that the current heat dissipation, represented by the actual value ⁇ dot over (q) ⁇ actual is adapted to the preset set point ⁇ dot over (q) ⁇ set for the heat dissipation.
- the volume flow rate ⁇ dot over (V) ⁇ is supplied as a control variable to the control system, in particular to a controlling valve 132 in the coolant circulation, so that said controlling valve 132 can properly adjust the volume flow rate of the coolant 300 through the side plate 200 for the present control variable.
Abstract
Description
- The invention concerns a method and a control device for automatically controlling the heat dissipation of a side plate of a mold in a continuous casting installation for casting metal in slabs, thin slabs, blooms, billets, or preliminary sections. The method of the invention is preferably used in standard slab casting installations and molds, which are operated at a much lower casting speed than thin-slab casting installations.
- A method for controlling the heat dissipation in a side plate of a mold is known, for example, from European Patent EP 1 070 560 B1, in which the specific heat dissipation, also known as heat flux density, is controlled in a wide-side plate by suitable variation of the flow rate of the cooling water through the wide-side plate. The control occurs according to the thickness of the side plate, which is made of copper. A definite threshold value for the heat flux density is defined as a function of the grade of steel that is to be cast and of the casting flux that is used. This prior art is aimed solely at limiting the heat dissipation of the during the relatively short start-up period in a thin-slab installation with high casting speed.
- Proceeding on the basis of this prior art, the objective of the invention is to provide a method and a control device for automatically controlling the heat dissipation in a side plate of a mold, which are characterized by automatic adaptation to a current or changed state of the side plates, especially during a steady-state casting operation.
- The objective with respect to a method is achieved by the method claimed in claim 1.
- The cooling behavior of a mold and especially its side plates is a critical factor in determining the quality of the cast metal. The claimed method offers the great advantage over the prior art that it does not require the coolant circulation and especially the amount of coolant to be adapted or adjusted to the material, the thickness or the coating of a specifically used side plate, or its altered setting during a steady-state casting operation. In this respect, the claimed method and the claimed control of the heat dissipation automatically adapt to the given current state of the side plate used.
- Another advantage is that the claimed control system does not require any presetting in regard to the particular grade of steel that is being cast.
- An advantage of the claimed method is that it makes it possible to adjust the cooling behavior of the side plate and thus the quality of the cast metal as a function of only a single variable to be preset, namely, the quantity of heat to be dissipated.
- Control of the heat dissipation during the casting start-up operation, in abnormal casting situations, as, for example, those caused by a change in the casting speed, or at the end of a casting operation is achieved by conventional control of the amounts of water; therefore, the method of the invention is expressly not applied to these types of operations and situations.
- In accordance with two alternative embodiments, the method of the invention advantageously provides either automatic control of the specific heat dissipation (with respect to the active cooling surface of the side plate) or automatic control of the absolute heat dissipation (without reference to the active cooling surface of the side plate).
- The measured values entering into the computation of the actual value for the heat dissipation, for example, the temperature of the coolant at the coolant inlet and outlet of the side plate and, optionally, the volume flow rate of coolant through the side plate, are advantageously averaged or filtered or buffered before they are introduced into the computation of the actual value for the heat dissipation. This has the advantage that the dynamic properties/components of the measured actual values are adapted to the, by comparison, relatively slow control of the heat dissipation by variations of the volume flow rate of the coolant.
- The control of the heat dissipation on the narrow side of a mold in accordance with the method of the invention offers the advantage that the control also automatically adapts to states specific to the narrow side and automatically simultaneously compensates effects on the casting process caused by their variation. For example, changed settings in the width and/or the conicity of the side plate during the casting operation are automatically simultaneously compensated by the claimed method during the automatic control of the heat dissipation, without it being necessary to determine these states separately and then to supply them to the control device.
- Simultaneous application of the method of the invention to two or more side plates of the mold guarantees that the heat dissipation is separately controlled for each of the side plates, but at the same time it advantageously allows the adjustment of a desired ratio for the heat dissipation values between the individual side plates. Adjustment of the desired ratio can be easily realized by predetermining the set points for the heat dissipation values for the individual side plates in the desired way. For example, it can be desirable for the heat dissipation values in the two opposite narrow-side plates of a mold to be the same or for the heat dissipation of the two wide sides together to be in a definite ratio to the heat dissipation of the two narrow sides together.
- The objective with respect to a device is achieved by a control device for automatically controlling the heat dissipation in a mold. The advantages of this control device are the same as the advantages specified above with reference to the method of the invention.
- Additional advantageous embodiments of the method of the invention and the device of the invention are objects of the dependent claims.
- The invention is explained below with reference to the example illustrated in the sole drawing.
- The drawing shows first of all the circulation of a
coolant 300 through theside plate 200 of a mold. The heat produced in the mold during the casting of a metal, especially a steel, is removed from the side plate by means of acoolant 300, which passes through cooling channels or cooling bores (not shown) in theside plate 200. The coolant is typically cooling water that has been treated with a corrosion inhibitor, with glycol, oils, or alcohol. Alternatively, activated water or distilled water can also be used. Each of these coolants is characterized by individual material constants, such as the specific gravity p or the specific heat at constant pressure cp. - After it has passed through the
side plate 200, the now heatedcoolant 300 is cooled by passing it through aheat exchanger 400, which is connected with a cooling tower. After it has been cooled, thecoolant 300 is fed to apump 600, which is driven by adrive unit 650. Thepump 600 maintains the circulation of thecoolant 300 and pumps the cooled coolant back through the cooling channels of theside plate 200. In addition, the closed coolant circulation can have an expansion tank 700 (gas reservoir), especially for establishing a system pressure. Apump 600 in the system just serves for compensating drops caused by friction. - The present invention concerns a method associated with the coolant circulation described above and an associated
control device 100 for automatically controlling the heat dissipation {dot over (q)} of theside plate 200 during a steady-state casting operation to a possibly variably predetermined set point {dot over (q)}set. - As the drawing shows, the
control device 100 of the invention comprises acomputing unit 110 for computing an actual value {dot over (q)}actual for the heat dissipation. Thecomputing unit 110 computes this actual value by the following physical formula: -
{dot over (q)} actual=(ρ*V*c p *d v)/A - where
-
- {dot over (q)}: the heat dissipation [W/m2]
- ρ: the density of the cooling water [kg/m3]
- {dot over (V)}: the volume flow rate of the cooling water
- cp: the specific heat of the cooling water (at constant pressure) [kJ/(kg·K)]
- dv: the temperature difference Tout-Tin [K]
- A: the active mold surface.
- The
computing unit 110 can be designed to compute the heat dissipation {dot over (q)} as a specific physical quantity, i.e., with reference to the active cooling surface of the side plate A, or as an absolute physical quantity, i.e., without reference to the active cooling surface A. The active surface is calculated as the active length of the side plate multiplied by the active width of the side plate or multiplied by the active thickness of the side plate. - The density ρ of the coolant used in the computation of the actual value for the heat dissipation {dot over (q)}actual its specific heat cp, and the possibly used active surface are each suitably supplied in advance to the computing unit as constants. By contrast, the temperatures Tin and Tout at the coolant inlet and coolant outlet of the side plate are each determined as current measured values; their difference dv is used as a factor of proportionality in the computation of the heat dissipation. Finally, the volume flow rate {dot over (V)} of the coolant per unit time through the side plate is supplied to the
computing unit 110 as a current actual value. This can be accomplished either by making current measurements of the volume flow rate {dot over (V)}, as shown in the drawing, or by feeding it back to thecomputing unit 110 as a controlled variable from the output of thecontroller 130, which is described below. - The drawing shows that the
control device 100 has anaveraging unit 140 for averaging or buffering the measured actual values with respect to time, especially the measured temperature values, before they are supplied to thecomputing unit 110. High-frequency spectral components and dynamic components in these measuring signals are filtered out by this averaging or buffering, and in this way these measuring signals are adapted to the otherwise rather slow control mechanism for the heat dissipation in theside plate 200. - As is also apparent from the drawing, the actual value for the heat dissipation {dot over (q)}actual produced by the
computing unit 110 is supplied to acomparator 120 for computing a control deviation Δ{dot over (q)} for the heat dissipation. Thecomparator 120 computes this control deviation by subtracting the supplied actual value for the heat dissipation {dot over (q)}actual from a possibly also variably preset set point for the heat dissipation {dot over (q)}set. Finally, the control deviation Δ{dot over (q)} is supplied to thecontroller 130, which converts the current control deviation to a suitable variation of the volume flow rate {dot over (V)} of thecoolant 300 through themold 200. This conversion is carried out in such a way that the current heat dissipation, represented by the actual value {dot over (q)}actual is adapted to the preset set point {dot over (q)}set for the heat dissipation. The volume flow rate {dot over (V)} is supplied as a control variable to the control system, in particular to a controllingvalve 132 in the coolant circulation, so that said controllingvalve 132 can properly adjust the volume flow rate of thecoolant 300 through theside plate 200 for the present control variable.
Claims (12)
{dot over (q)}(ρ*V*c p *d v)/A
{dot over (q)}=(ρ*V*c p *d v)/A
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006051665 | 2006-11-02 | ||
DE102006051665.6 | 2006-11-02 | ||
DE102006060673.6 | 2006-12-21 | ||
DE102006060673A DE102006060673A1 (en) | 2006-11-02 | 2006-12-21 | Method and control device for controlling the heat dissipation of a side plate of a mold |
PCT/EP2007/009212 WO2008052689A1 (en) | 2006-11-02 | 2007-10-24 | Method and control device for controlling the heat removal from a side plate of a mould |
Publications (1)
Publication Number | Publication Date |
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US20100044000A1 true US20100044000A1 (en) | 2010-02-25 |
Family
ID=38920541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/312,014 Abandoned US20100044000A1 (en) | 2006-11-02 | 2007-10-24 | Method and control device for controlling the heat removal from a side plate of a mold |
Country Status (7)
Country | Link |
---|---|
US (1) | US20100044000A1 (en) |
EP (1) | EP2086703A1 (en) |
JP (1) | JP2010508151A (en) |
KR (1) | KR20090064439A (en) |
CA (1) | CA2664891A1 (en) |
DE (1) | DE102006060673A1 (en) |
WO (1) | WO2008052689A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201600128897A1 (en) * | 2016-12-20 | 2018-06-20 | Biesse Spa | MACHINE FOR EDGING WOODEN PANELS OR THE LIKE |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102527974B (en) * | 2012-01-18 | 2013-06-12 | 重庆钢铁(集团)有限责任公司 | Method for preventing narrow surface of continuous casting sheet billet from bulging |
KR101505140B1 (en) | 2013-04-30 | 2015-03-23 | 현대제철 주식회사 | Methods for decreasing surface defect of high carbon steel slab |
KR101505153B1 (en) * | 2013-04-30 | 2015-03-23 | 현대제철 주식회사 | Continuous casting method |
KR101505154B1 (en) * | 2013-04-30 | 2015-03-23 | 현대제철 주식회사 | Method for manufacturing coil |
KR101505149B1 (en) * | 2013-04-30 | 2015-03-23 | 현대제철 주식회사 | Method for manufacturing coil |
KR101505159B1 (en) * | 2013-06-27 | 2015-03-23 | 현대제철 주식회사 | Methods for manufacturing coil |
DE102014112206A1 (en) * | 2014-08-26 | 2016-03-03 | Peter Valentin | Method for continuous casting of a metal, in particular a steel, and apparatus for continuous casting |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3886991A (en) * | 1972-04-18 | 1975-06-03 | Concast Ag | Method and apparatus for controlling the withdrawal of heat in molds of continuous casting installations |
US4235276A (en) * | 1979-04-16 | 1980-11-25 | Bethlehem Steel Corporation | Method and apparatus for controlling caster heat removal by varying casting speed |
US5927378A (en) * | 1997-03-19 | 1999-07-27 | Ag Industries, Inc. | Continuous casting mold and method |
US6152209A (en) * | 1997-05-31 | 2000-11-28 | Sms Schloemann-Siemag Aktiengesellschaft | Method and device for measuring and regulating the temperature and quantity of cooling water for water-coolable walls of a continuous casting mold |
US6776217B1 (en) * | 1999-11-25 | 2004-08-17 | Sms Demag Ag | Method for continuous casting of slab, in particular, thin slab, and a device for performing the method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH643764A5 (en) * | 1979-10-02 | 1984-06-29 | Concast Ag | METHOD FOR MONITORING THE CHILLER GEOMETRY IN STEEL CASTING. |
DE19838331A1 (en) * | 1997-05-31 | 2000-03-02 | Schloemann Siemag Ag | Measuring and control of the temperature and volume of cooling water for a continuous casting mold involves adjusting the water flow rate and pressure at the exit from the mold plates |
DE10027324C2 (en) * | 1999-06-07 | 2003-04-10 | Sms Demag Ag | Process for casting a metallic strand and system therefor |
ATE283744T1 (en) * | 1999-07-17 | 2004-12-15 | Sms Demag Ag | METHOD FOR CONTROLLING COOLING WATER FLOW SPEED THROUGH MILL WIDTH SIDES |
DE10028304A1 (en) * | 2000-06-07 | 2001-12-13 | Sms Demag Ag | Process for locally processing casting data obtained from sensors in a continuous casting plant comprises collecting measuring and control data in cooled field bus modules |
-
2006
- 2006-12-21 DE DE102006060673A patent/DE102006060673A1/en not_active Withdrawn
-
2007
- 2007-10-24 CA CA002664891A patent/CA2664891A1/en not_active Abandoned
- 2007-10-24 JP JP2009535012A patent/JP2010508151A/en not_active Withdrawn
- 2007-10-24 WO PCT/EP2007/009212 patent/WO2008052689A1/en active Application Filing
- 2007-10-24 KR KR1020097007229A patent/KR20090064439A/en not_active Application Discontinuation
- 2007-10-24 EP EP07819269A patent/EP2086703A1/en not_active Withdrawn
- 2007-10-24 US US12/312,014 patent/US20100044000A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3886991A (en) * | 1972-04-18 | 1975-06-03 | Concast Ag | Method and apparatus for controlling the withdrawal of heat in molds of continuous casting installations |
US4235276A (en) * | 1979-04-16 | 1980-11-25 | Bethlehem Steel Corporation | Method and apparatus for controlling caster heat removal by varying casting speed |
US5927378A (en) * | 1997-03-19 | 1999-07-27 | Ag Industries, Inc. | Continuous casting mold and method |
US6152209A (en) * | 1997-05-31 | 2000-11-28 | Sms Schloemann-Siemag Aktiengesellschaft | Method and device for measuring and regulating the temperature and quantity of cooling water for water-coolable walls of a continuous casting mold |
US6776217B1 (en) * | 1999-11-25 | 2004-08-17 | Sms Demag Ag | Method for continuous casting of slab, in particular, thin slab, and a device for performing the method |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201600128897A1 (en) * | 2016-12-20 | 2018-06-20 | Biesse Spa | MACHINE FOR EDGING WOODEN PANELS OR THE LIKE |
Also Published As
Publication number | Publication date |
---|---|
EP2086703A1 (en) | 2009-08-12 |
DE102006060673A1 (en) | 2008-05-08 |
JP2010508151A (en) | 2010-03-18 |
CA2664891A1 (en) | 2008-05-08 |
WO2008052689A1 (en) | 2008-05-08 |
KR20090064439A (en) | 2009-06-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SMS DEMAG AKTIENGESELLSCHAFT,GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FRIEDRICH, JURGEN;WEYER, AXEL;KORZI, MATTHEW;SIGNING DATES FROM 20090331 TO 20090402;REEL/FRAME:022591/0936 |
|
AS | Assignment |
Owner name: SMS SIEMAG AKTIENGESELLSCHAFT,GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AG;REEL/FRAME:023725/0342 Effective date: 20090325 Owner name: SMS SIEMAG AKTIENGESELLSCHAFT, GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AG;REEL/FRAME:023725/0342 Effective date: 20090325 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |