Patents Assigned to Oskar Frech GmbH & Co. KG
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Patent number: 8042750Abstract: 1. Release agent spray device for a casting machine. 2.1. The invention relates to a release agent spray device for a casting machine, having one or more spray nozzles (1) and discharge means for the controlled discharge of release agent from the respective spray nozzle. 2.2. According to the invention, the discharge means comprise at least one dosing unit (3) which is assigned to at least one spray nozzle (1) and which defines, in advance, a release agent quantity to be discharged by the at least one associated spray nozzle in an impending spray burst and which provides said release agent quantity, separated from a release agent supply, for discharge in the impending spray burst. 2.3. Use for example for metal pressure-die-casting machines.Type: GrantFiled: December 1, 2008Date of Patent: October 25, 2011Assignee: Oskar Frech GmbH & Co. KGInventors: Norbert Erhard, Hubert Pschenitschni
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Publication number: 20110000634Abstract: A casting machine system includes a first casting machine and a separate second casting machine, wherein the first casting machine is a metal-casting machine and the second casting machine is a plastic-casting machine, or the first casting machine is a plastic-casting machine and the second casting machine is a metal-casting machine. An associated process produces hybrid metal/plastic articles. The casting machine includes a transfer device for transferring a precursor product, produced by a first casting process in the first casting machine, to the second casting machine, in which a hybrid metal/plastic component is formed from the precursor product by a second casting process, and a temperature-regulating device for regulating the temperature of the precursor product in a controllable manner after its removal from the first casting machine, and before starting the second casting process.Type: ApplicationFiled: December 19, 2008Publication date: January 6, 2011Applicant: Oskar Frech GmbH + Co. KGInventors: Norbert Erhard, Helmar Dannenmann, Juergen Kurz, Knut Morgenstern, Wolfgang Nendel, Tino Zucker, Bernd Zimmer, Martin Kausch
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Patent number: 7810550Abstract: A metering device for a hot chamber die-casting machine includes a casting container attachable to a crucible of the hot chamber die-casting machine, a riser channel in a riser channel area, and a casting piston unit for metered conveying of melt out of the crucible via the riser channel. A heating device is provided with a flameless heating unit for active heating of at least a part of the riser channel area. The heating unit is placed inside a piston rod leadthrough bore, electrically insulated from the riser channel in a riser bore containing the riser channel, or in a heater receiving space specially provided in the casting container.Type: GrantFiled: February 22, 2007Date of Patent: October 12, 2010Assignee: Oskar Frech GmbH & Co. KGInventors: Norbert Erhard, Ulrich Schraegle
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Publication number: 20090302192Abstract: 1. Release agent spray device for a casting machine. 2.1. The invention relates to a release agent spray device for a casting machine, having one or more spray nozzles (1) and discharge means for the controlled discharge of release agent from the respective spray nozzle. 2.2. According to the invention, the discharge means comprise at least one dosing unit (3) which is assigned to at least one spray nozzle (1) and which defines, in advance, a release agent quantity to be discharged by the at least one associated spray nozzle in an impending spray burst and which provides said release agent quantity, separated from a release agent supply, for discharge in the impending spray burst. 2.3. Use for example for metal pressure-die-casting machines.Type: ApplicationFiled: December 1, 2008Publication date: December 10, 2009Applicant: Oskar Frech GmbH & Co., KGInventors: Norbert Erhard, Hubert Pschenitschni
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Patent number: 7472841Abstract: A spray head is described for spraying the molds in pressure casting machines, and in it spray nozzles are mounted on bars equipped with supply passages, which form units which can be placed together. To fit these bar units together, coupling elements in the form of cylindrical pins provided with passages are provided, which are provided with recesses having sloping planes which are engaged by the conical tips of Allen screws and thus produce a clamping together of adjacent bar units. The coupling elements are provided at both end faces with sealing rings and their bore aligns with the passages in the bars. Through the use of angle pieces media supply bars bearing spray nozzles can be joined together at any angle to one another.Type: GrantFiled: April 16, 2004Date of Patent: January 6, 2009Assignee: Oskar Frech GmbH + Co. KGInventors: Norbert Erhard, Hubert Pschenitschni
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Publication number: 20080289791Abstract: A feed block unit for a hot-runner feed system of a pressure die-casting machine includes a block body in which is incorporated at least one melt-conveying channel running out of the block body by way of a sprue orifice close to the gate, and a heating system, integrated into the block body, for the at least one melt-conveying channel. The feed block unit is designed as a structural unit which is insertable independently into a respective casting mould, and/or the heating system integrated therein includes at least a first heating device for supply channel heating and a second heating device, which can be controlled independently of the first heating device, for sprue channel heating. With this modular hot-runner feed system, individual temperature profiles can be predetermined and set for the respective feed block unit.Type: ApplicationFiled: May 23, 2008Publication date: November 27, 2008Applicant: Oskar Frech GmbH & Co. KGInventors: Norbert ERHARD, Dietmar GERWIG, Herbert TREBES
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Patent number: 7290588Abstract: A protective gas device for the melting furnaces of pressure die-casting machines, in particular for processing a magnesium melt. A collection container of a mixing device for the components of a protective gas, which covers the melt to prevent oxidation or other damage, is configured as a pressure accumulator and the orifices for feeding the protective gas into the melting furnace are provided with inlet nozzles. Gas flow to the inlet nozzles is regulated by metering devices. The operating pressure is equal to or less than the pressure in the pressure accumulator of the mixing device, but high enough to atomise the jets and produce a turbulent inflow behind the inlet nozzles. Said pressurized protective-gas distribution permits the metering of gas into various furnace chambers or furnaces without repercussions. A uniform concentration of the protective gas can be achieved in all areas by the selective arrangement of the inlet nozzles.Type: GrantFiled: September 19, 2003Date of Patent: November 6, 2007Assignee: Oskar Frech GmbH & Co. KGInventors: Norbert Erhard, Ulrich Schraegle, Gerd Mentel
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Publication number: 20070199674Abstract: A metering device for a hot chamber die-casting machine includes a casting container attachable to a crucible of the hot chamber die-casting machine, a riser channel in a riser channel area, and a casting piston unit for metered conveying of melt out of the crucible via the riser channel. A heating device is provided with a flameless heating unit for active heating of at least a part of the riser channel area. The heating unit is placed inside a piston rod leadthrough bore, electrically insulated from the riser channel in a riser bore containing the riser channel, or in a heater receiving space specially provided in the casting container.Type: ApplicationFiled: February 22, 2007Publication date: August 30, 2007Applicant: Oskar Frech GmbH + Co. KGInventors: Norbert Erhard, Ulrich Schraegle
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Patent number: 7156144Abstract: A spray head for a spraying tool for spraying the halves of a casting tool is described, in which the connection is made to a traveling arm provided with the media-carrying passages through distributing blocks disposed one under the other, from which the connection is made to spray bars through cross connections. The new configuration is selected such that the connection of the spray bars can be made selectively to the one or other of the media passages. By arranging a plurality of distributing blocks together, the addition of spray bars can also be performed stack-wise at varying distances from the particular distributing block.Type: GrantFiled: April 16, 2004Date of Patent: January 2, 2007Assignee: Oskar Frech GmbH +Co. KGInventors: Norbert Erhard, Hubert Pschenitschni
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Publication number: 20060090874Abstract: A protective gas device for the melting furnaces of pressure die-casting machines, in particular for processing a magnesium melt. A collection container of a mixing device for the components of a protective gas, which covers the melt to prevent oxidation or other damage, is configured as a pressure accumulator and the orifices for feeding the protective gas into the melting furnace are provided with inlet nozzles. Gas flow to the inlet nozzles is regulated by metering devices. The operating pressure is equal to or less than the pressure in the pressure accumulator of the mixing device, but high enough to atomise the jets and produce a turbulent inflow behind the inlet nozzles. Said pressurized protective-gas distribution permits the metering of gas into various furnace chambers or furnaces without repercussions. A uniform concentration of the protective gas can be achieved in all areas by the selective arrangement of the inlet nozzles.Type: ApplicationFiled: September 19, 2003Publication date: May 4, 2006Applicant: Oskar Frech GmbH & Co. KGInventors: Norbert Erhard, Ulrich Schraegle, Gerd Mentel
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Patent number: 7032842Abstract: In a spray element for a spray head for spraying the molds of pressure casting machines, a control piston for the release of the parting agent supply is disposed beside the spray nozzle and a connecting passage opens in a chamber of the housing in which one end of the control piston is sealingly guided, while its second end lies with a sealing ring before a chamber fed with parting agent. In the case of the application of control air the sealing ring is shifted out of its cylindrical section 26 into the chamber, so that the feed of parting agent to the spray nozzle is released. If the control air is shut off, then the sealing ring closes the delivery of the parting agent, and the second, larger end of the control piston exercises upon its return movement a reverse suction effect on the connecting passage. Any after-dripping of parting agent is securely prevented.Type: GrantFiled: April 16, 2004Date of Patent: April 25, 2006Assignee: Oskar Frech GmbH & Co. KGInventors: Norbert Erhard, Hubert Pschenitschni
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Publication number: 20040222322Abstract: A spray head for a spraying tool for spraying the halves of a casting tool is described, in which the connection is made to a traveling arm provided with the media-carrying passages through distributing blocks disposed one under the other, from which the connection is made to spray bars through cross connections. The new configuration is selected such that the connection of the spray bars can be made selectively to the one or other of the media passages. By arranging a plurality of distributing blocks together, the addition of spray bars can also be performed stack-wise at varying distances from the particular distributing block.Type: ApplicationFiled: April 16, 2004Publication date: November 11, 2004Applicant: Oskar Frech GmbH + Co. KGInventors: Norbert Erhard, Hubert Pschenitschni
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Publication number: 20040217211Abstract: A spray head is described for spraying the molds in pressure casting machines, and in it spray nozzles are mounted on bars equipped with supply passages, which form units which can be placed together. To fit these bar units together, coupling elements in the form of cylindrical pins provided with passages are provided, which are provided with recesses having sloping planes which are engaged by the conical tips of Allen screws and thus produce a clamping together of adjacent bar units. The coupling elements are provided at both end faces with sealing rings and their bore aligns with the passages in the bars. Through the use of angle pieces media supply bars bearing spray nozzles can be joined together at any angle to one another.Type: ApplicationFiled: April 16, 2004Publication date: November 4, 2004Applicant: Oskar Frech GmbH + Co. KGInventors: Norbert Erhard, Hubert Pschenitschni
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Publication number: 20040217212Abstract: In a spray element for a spray head for spraying the molds of pressure casting machines, a control piston for the release of the parting agent supply is disposed beside the spray nozzle and a connecting passage opens in a chamber of the housing in which one end of the control piston is sealingly guided, while its second end lies with a sealing ring before a chamber fed with parting agent. In the case of the application of control air the sealing ring is shifted out of its cylindrical section 26 into the chamber, so that the feed of parting agent to the spray nozzle is released. If the control air is shut off, then the sealing ring closes the delivery of the parting agent, and the second, larger end of the control piston exercises upon its return movement a reverse suction effect on the connecting passage. Any after-dripping of parting agent is securely prevented.Type: ApplicationFiled: April 16, 2004Publication date: November 4, 2004Applicant: Oskar Frech GmbH + Co. KGInventors: Norbert Erhard, Hubert Pschenitschni