Patents by Inventor Lothar Parschat
Lothar Parschat has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7043404Abstract: A method for local processing of casting data arising from measurement data obtained from a continuous casting mold by sensors. The data processing is carried out using a process control computer pertaining to the control system of the continuous casting installation. The measurement and control data is immediately collected from the continuous casting mold in cold field modules, converted to bus signals in a bus line, stored at least in the control system of the continuous casting installation, and/or processed.Type: GrantFiled: May 26, 2001Date of Patent: May 9, 2006Assignee: SMS Demag AGInventors: Matthias Arzberger, Martin Langer, Josef Deussen, Walter Schmalz, Lothar Parschat
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Patent number: 6854507Abstract: A system provided in a high-speed continuous casting plant for casting a metallic strand for automatically operating the high-speed continuous casting plant. In the system, the stopping or slide movement, the modification of the steel level, the heat currents through the mold walls, the temperature of the liquid metal and the drawing-off speed are measured over the casting time, supplied to a computer and compared with predetermined limit values for an automatic operating mode.Type: GrantFiled: June 4, 2004Date of Patent: February 15, 2005Assignee: SMS Demag AGInventors: Fritz-Peter Pleschiutschnigg, Stephan Feldhaus, Lothar Parschat, Michael Vonderbank, Thomas Ulke, Robert Victor Kowalewski, Rolf-Peter Heidemann
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Publication number: 20040256078Abstract: The invention relates to a device for cooling the copper plates (1.1) of a continuous casting ingot mould (1) for liquid metals, especially liquid steel, comprising an ingot mould coolant (2) which is guided in cooling channels.Type: ApplicationFiled: August 13, 2004Publication date: December 23, 2004Inventors: Fritz-Peter Pleschiutschnigg, Stephan Feldhaus, Wolfgang Mossner, Werner Rahmfeld, Lothar Parschat
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Publication number: 20040256080Abstract: The invention relates to a method for optimizing the cooling capacity of a continuous casting mold (1) for liquid metals, particularly for liquid steel, by homogenizing the thermal load (22) above the height of the continuous casting mold (1). According to the method, the cooling medium (5) is guided through a cross-sectional area of a large number of cooling medium channels (3) or cooling medium boreholes (4) running approximately parallel to the cast billet (9). The cooling medium cross-sectional areas between the mold entry (6) and the mold exit (7) are configured differently.Type: ApplicationFiled: April 15, 2004Publication date: December 23, 2004Inventors: Werner Rahmfeld, Erwin Wosch, Fritz-Peter Pleschiutschnigg, Stephan Feldhaus, Wolfgang Mossner, Lothar Parschat, Uwe Kopfstedt
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Publication number: 20040244941Abstract: A system provided in a high-speed continuous casting plant for casting a metallic strand for automatically operating the high-speed continuous casting plant. In the system, the stopping or slide movement, the modification of the steel level, the heat currents through the mold walls, the temperature of the liquid metal and the drawing-off speed are measured over the casting time, supplied to a computer and compared with predetermined limit values for an automatic operating mode.Type: ApplicationFiled: June 4, 2004Publication date: December 9, 2004Inventors: Fritz-Peter Pleschiutschnigg, Stephan Feldhaus, Lothar Parschat, Michael Vonderbank, Thomas Ulke, Robert Victor Kowalewski, Rolf-Peter Heidemann
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Patent number: 6793006Abstract: The invention relates to a method for automatically opening a high-speed continuous casting plant According to said method the stopping or slide movement, the modification of the steel level, the heat currents through the mold walls, the temperature of the liquid metal and the drawing-off speed are measured over the casting time, supplied to a computer and compared with predetermined limit values for an automatic operating mode.Type: GrantFiled: May 10, 2002Date of Patent: September 21, 2004Assignee: SMS Demag AGInventors: Fritz-Peter Pleschiutschnigg, Stephan Feldhaus, Lothar Parschat, Michael Vonderbank, Thomas Ulke, Robert Victor Kowalewski, Rolf-Peter Heidemann
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Publication number: 20040031583Abstract: The invention relates to a method, which is used in the area of secondary metallurgy (4) in its entirety with a final temperature-determining process step (4.1) such as a ladle furnace, for controlling the temperature of steel from the surface of the bath of a continuous casting ingot mold (1) up to the furnace tap (5) of a steel producing process. According to the invention, the temperature of the steel in the surface of the bath is controlled based on the equation TML=TLI+X° C. (X=5-15° C. and while respecting the same such that a jump in temperature (9) between the surface of the bath in the ingot mold (1) and a distributor (3) is detected according to the pouring rate (6) for a predetermined billet size.Type: ApplicationFiled: April 10, 2003Publication date: February 19, 2004Inventors: Fritz-Peter Pleschiutschnigg, Lothar Parschat, Eckart Schwencke, Erwin Wosch, Bernt Rollinger, Stephan Feldhaus
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Patent number: 6543519Abstract: A method of controlling a hot face temperature of a copper plate of a mold for continuous casting of steel with variable casting rates and including: providing a bypass line for connecting a mold water outlet with a mold water inlet for obtaining, at the mold water inlet a mixture of heated mold water and cooled mold water, which mixture is fed into the mold as a cooling water having a chageable temperature depending on casting conditions; providing, at the mold water outlet, a two-way valve connectable with the bypass line and a heat exchanger for cooling the heated mold water for distributing the heated mold water between the bypass line and the heat exchanger with; and control of the operation of the two-way valve in accordance with the exit water temperature to maintain a constant predetermined water temperature at the mold water outlet, whereby a constant hot face temperature is maintained.Type: GrantFiled: April 24, 2001Date of Patent: April 8, 2003Assignee: SMS Demag AktiengesellschaftInventors: Fritz-Peter Pleschiutschnigg, Stephan Feldhaus, Jürgen Friedrich, Uwe Kopfstedt, Lothar Parschat, Werner Rahmfeld, Dieter Stalleicken, Axel Weyer, Erwin Wosch, Michael Vonderbank
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Patent number: 6539273Abstract: A continuous caster is controlled by a method anticipating the liquidus temperature in the mold of the caster to prevent premature solidification. The temperature in the tundish is measured and based upon the tundish temperature and the resistance time of the molten metal in the tundish, an equivalent liquidus temperature window is defined and the speed of the continuous caster is controlled to maintain this window of operation of the tundish.Type: GrantFiled: July 5, 2000Date of Patent: March 25, 2003Assignee: SMS Schloemann-Siemag AGInventors: Fritz-Peter Pleschiutschnigg, Stephan Feldhaus, Lothar Parschat, Michael Vonderbank, Erwin Wosch
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Publication number: 20030014195Abstract: The invention relates to a method for local processing of casting data arising from measurement data obtained from a continuous casting chill (1) by means of sensors (10). Said data processing is carried out using a process control computer (11) pertaining to the control system of the continuous casting installation. The inventive method increases the efficiency of the measuring section and simplifies the device whereby the measurement and control data is immediately collected from the continuous casting chill (1) in cold field bus modules (2), converted to bus signals in a bus line (3), stored at least in the control system of the continuous casting installation, and/or processed.Type: ApplicationFiled: June 27, 2002Publication date: January 16, 2003Inventors: Matthias Arzberger, Martin Langer, Josef Deussen, Walter Schmalz, Lothar Parschat
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Publication number: 20020020513Abstract: In a process for thermal control of the copper plate of a continuous casting mold (1), said plate being the plate facing the steel, for different casting rates, copper plate thicknesses, casting formats, water quantities and water pressures, wherein a selectable mold coolant water temperature at the mold outlet (2) is maintained constant independent of casting velocity, the mold outlet temperature (24.1; 24.2) is measured and controlled using a pup joint (31) between the mold outlet (29) and the mold inlet (30) and a two-way valve (23) with a take-off for a partial quantity of the mold outlet water to a heat exchanger, and the hot mold outlet water is mixed/blended with the cooled mold outlet water and, depending on the casting conditions, temperature-controlled mold inlet water, whereby water quantity and water pressure is controlled using a pump device, is driven through the mold, whereby the mold water at the mold outlet exhibits a constant temperature.Type: ApplicationFiled: April 24, 2001Publication date: February 21, 2002Inventors: Fritz-Peter Pleschiutschnigg, Stephan Feldhaus, Jurgen Friedrich, Uwe Kopfstedt, Lothar Parschat, Werner Rahmfeld, Dieter Stalleicken, Axel Weyer, Erwin Wosch, Michael Vonderbank
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Patent number: 6260604Abstract: A strand pulling-off method for a metal strand, particularly a steel strip, cast in a curved continuous casting plant, wherein the metal strand is initially vertically pulled from a casting mold, wherein a curved shape is then imparted on the metal strand in a curved entry driver driven with an entry torque, and wherein, after reaching a horizontal strand travel direction, the metal strand is finally straightened in a curved exit driver driven with an exit torque. An entry speed is assigned to the curved entry driver and an exit speed is assigned to the curved exit driver, the entry torque and the exit torque are determined, and the exit speed is adjusted in such a way that the entry torque as well as the exit torque have a positive value.Type: GrantFiled: June 30, 1999Date of Patent: July 17, 2001Assignee: SMS Schloemann-Siemag AktiengesellschaftInventors: Carsten Lippold, Karl Hoen, Jürgen Bernhardt, Lothar Parschat
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Patent number: 5881441Abstract: An apparatus and a process for making semi-finished products in the form of ti metal bars having a width-gauge ratio of over 60 and a maximum sheet metal gauge tolerance of 2%. A metal profile is fed continuously and upwardly through a pool of melt material having the same composition as the metal profile so as to form a coated metal profile. The metal profile is fed at a rate which would result in a coated metal profile having a thickness of at least three times that of the uncoated metal profile. The coated metal profile is subjected to a smoothing pass between a pair of smoothing rolls when the mean temperature in the crystallized layer of the coated metal profile meets a given condition. The smoothing rolls are adjustably disposed inside a housing at a distance of 0.5 to 5 m from the melt pool surface.Type: GrantFiled: September 30, 1997Date of Patent: March 16, 1999Assignee: Mannesmann AktiengesellschaftInventors: Fritz P. Pleschiutschnigg, Lothar Parschat, Dieter Stalleicken, Tarek El Gammal, Michael Vonderbank, Peter Lorenz Hamacher, Ingo von Hagen, Ulrich Menne, Uwe Schmidt
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Patent number: 5850869Abstract: An inversion casting device with a crystallizer which has a slit-shaped passage for guiding a substrate strip, this passage being arranged in the base and provided with a seal, and which communicates with a melt feed. A collecting tank is provided which passes horizontally about the crystallizer vessel so that the collecting tank communicates with nozzles (23) arranged in the region of the passage. The nozzle orifices are so arranged that the melt flowing out strikes the substrate strip at a flat angle of inclination .alpha. in the strip take-off direction.Type: GrantFiled: May 22, 1997Date of Patent: December 22, 1998Assignee: Mannesmann AktiengesellschaftInventors: Fritz-Peter Pleschiutschnigg, Dieter Stalleicken, Lothar Parschat, Ingo von Hagen, Ulrich Menne, Tarek El Gammal, Peter Lorenz Hamacher, Michael Vonderbank
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Patent number: 5832984Abstract: Molten steel is poured into a water cooled continuous casting mold in which the steel solidifies partially with the formation of a strand having a length and a peripheral shell. The strand has a cross-sectional surface area with one of a round shape, an oval shape and a polygonal shape having more than four sides. Additionally, the strand has a minimum circumference of 200 mm. The cross-sectional surface area of the strand leaving the mold is then reduced using rolls before the strand fully solidifies. The reducing includes deforming the strand into a polygonal shape having at least four corners while maintaining the circumference as well as the length of the strand at the peripheral shell constant.Type: GrantFiled: September 5, 1996Date of Patent: November 10, 1998Assignee: Mannesmann AktiegesellschaftInventors: Fritz-Peter Pleschiutschnigg, Lothar Parschat, Dieter Stalleicken, Winfried Binder, Klaus Bruckner, Ingo von Hagen, Werner Rahmfeld
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Patent number: 5722151Abstract: An apparatus and a process for making semi-finished products in the form of thin metal bars having a width-gauge ratio of over 60 and a maximum sheet metal gauge tolerance of 2%. A metal profile is fed continuously and upwardly through a pool of melt material having the same composition as the metal profile so as to form a coated metal profile. The metal profile is fed at a rate which would result in a coated metal profile having a thickness of at least three times that of the uncoated metal profile. The coated metal profile is subjected to a smoothing pass between a pair of smoothing rolls when the mean temperature in the crystallized layer of the coated metal profile meets a given condition. The smoothing rolls are adjustably disposed inside a housing at a distance of 0.5 to 5 m from the melt pool surface.Type: GrantFiled: January 25, 1996Date of Patent: March 3, 1998Assignee: Mannesmann AktiengesellschaftInventors: Fritz P. Pleschiutschnigg, Lothar Parschat, Dieter Stalleicken, Tarek El Gammal, Michael Vonderbank, Peter Lorenz Hamacher, Ingo von Hagen, Ulrich Menne, Uwe Schmidt
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Patent number: 5467809Abstract: A liquid-cooled plate mold with adjustable width for the continuous casting of billets from steel in the form of slabs, particularly for a slab thickness of less than 100 mm. The shape-imparting broad side plates (1) and narrow side plates (2) of the ingot mold are constructed in the direction of their transverse extension so as to increase in cross section for the billet, while the narrow side plates (2) extend substantially parallel to one another along the height of the ingot mold. Further, the broad side plates (1) are constructed so as to be concave at least in a region (3) of smallest slab width in such a way that, in cross section, the apex height (13) of the ingot mold wall forming a curve has a determined height relative to a rectangle inserted in the drawing. The shape of the billet side plates at the billet outlet end (5) corresponds to the billet format to be produced.Type: GrantFiled: June 1, 1993Date of Patent: November 21, 1995Assignee: Mannesmann AktiengesellschaftInventors: Giovanni Arvedi, Giovanni Gosio, Ulrich Siegers, Luciano Manini, Fritz-Peter Pleschiutschnigg, Lothar Parschat, Hans-Gunther Thurm, Harald Ludorff
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Patent number: 5402993Abstract: The invention is directed to an immersion casting pipe for feeding molten steel from a casting vessel into a mold having wide side walls and narrow side walls for the production of flat products. The immersion casting pipe has a pipe piece which adjoins the casting vessel and expands in cross section in the direction of the narrow side walls of the mold. The pipe piece is provided with a central base member at the lower end which allows for outlet openings for the melt. For the purpose of developing an immersion outlet which allows higher slab withdrawal speed of up to 6 m/min with slabs measuring 50 to 100 mm in thickness and 600 mm to 2000 mm in width, the inner wall of the portion of the immersion casting pipe which widens in cross section forms flow channels in conjunction with the opposite wall parts of the base member. The axes of the flow channels enclose an angle .alpha. between 10.degree. and 22.degree.Type: GrantFiled: February 17, 1994Date of Patent: April 4, 1995Assignee: Mannesmann AktiengesellschaftInventors: Georg Hofmann, Lothar Parschat, Fritz P. Pleschiutschnigg, Peter Wahls, Hans Butz, Ulrich Siegers
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Patent number: 5335714Abstract: The invention relates to a dummy bar for continuous casting installations with a curved bar guide arranged downstream of a mold. The invention provides a dummy bar which is characterized by a flexible metallic strip (1) and components (3) which are fastened to a surface of the strip (1) for detachably connecting with spacers (2) extending in the shape of strips along the width of the strip (1) on the same surface transversely to the longitudinal direction of the strip, which spacers (2) have mutually adjacent contact areas (6) at least in the region of the components (3). The free surface of the spacers (2) is covered with congruent rubber-like plates (5) and the free surface of the strip (1) is provided with a rubber-like coating (4).Type: GrantFiled: September 3, 1993Date of Patent: August 9, 1994Assignee: Mannesmann AktiengesellschaftInventors: Giovanni Arvedi, Harald Ludorff, Hans G. Thurm, Lothar Parschat, Fritz-Peter Pleschiutschnigg, Hans-Joachim Paris, Michael Steuten
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Patent number: 5314099Abstract: An immersion nozzle (2) for metallurgical recipients, in particular for a reservoir arranged upstream of a continuous casting ingot mould, has an interchangeable discharge pipe (2) which can be attached in a leakproof manner on or in a perforated brick (1). To improve the flow conditions and hence the efficiency of the casting, the inlet side of the nozzle comprises an upper elongated section (12) in the form of a tubular shaft (11) which expands conically downward to a given plane and which is narrow in a plane perpendicular to the given plane. A second elongate section (13) ends in an elongated transverse flow section of given dimensions.Type: GrantFiled: September 19, 1989Date of Patent: May 24, 1994Assignee: Mannesmann AGInventors: Hans Butz, Gerd Diederich, Hans-Juergen Ehrenberg, Dietmar Lohse, Lothar Parschat, Fritz-Peter Pleschiutschnigg