Patents by Inventor Rainer Zimmet
Rainer Zimmet 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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Publication number: 20100276842Abstract: In a method of producing an injection-molded part, a material is processed and/or plasticized by means of a multi-screw extruder having a plurality of processing zones. An additive having barrier characteristics is admixed by a feed unit in at least one of the processing zones. The material is processed and dried in the extruder, and can then be transferred to a transfer reservoir for further processing.Type: ApplicationFiled: July 16, 2010Publication date: November 4, 2010Applicants: KraussMaffei Berstorff GmbH, KraussMaffei Technologies GmbHInventors: GUNTHER FISCHBACH, Jens Liebhold, Markus Berndt, Rainer Zimmet, Matthias Sieverding
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Patent number: 7815838Abstract: In a method of operating an injection molding machine of a type having an injection plunger for pushing melt from an injection space anteriorly of an injection plunger into an injection mold, a plasticizing screw of an extruder is continuously operated to continuously feed melt through a melt channel into the injection space. A passage through the melt channel is closed to allow backup of melt backwards into the extruder, and the injection plunger is moved forward to inject a shot amount from the injection space into the injection mold.Type: GrantFiled: September 29, 2006Date of Patent: October 19, 2010Assignee: KraussMaffei Technologies GmbHInventor: Rainer Zimmet
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Patent number: 7815833Abstract: In a method for producing injection-molded parts, PET material is processed and/or plasticized by means of a twin-screw extruder having a plurality of processing zones. At least two processing zones are implemented as degassing zones. The processed and/or plasticized material is transferred to a transfer reservoir and then further processed by a piston unit.Type: GrantFiled: October 16, 2008Date of Patent: October 19, 2010Assignees: KraussMaffei Technologies GmbH, KraussMaffei Berstorff GmbHInventors: Gunther Fischbach, Jens Liebhold, Markus Berndt, Rainer Zimmet, Matthias Sieverding
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Publication number: 20090051070Abstract: In a method for producing injection-molded parts, PET material is processed and/or plasticized by means of a twin-screw extruder having a plurality of processing zones. At least two processing zones are implemented as degassing zones. The processed and/or plasticized material is transferred to a transfer reservoir and then further processed by a piston unit.Type: ApplicationFiled: October 16, 2008Publication date: February 26, 2009Applicants: Berstorff GmbH, Krauss-Maffei Kunststofftechnik GmbHInventors: Gunther Fischbach, Jens Liebhold, Markus Berndt, Rainer Zimmet, Matthias Sieverding
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Publication number: 20080079196Abstract: In a method of operating an injection molding machine of a type having an injection plunger for pushing melt from an injection space anteriorly of an injection plunger into an injection mold, a plasticizing screw of an extruder is continuously operated to continuously feed melt through a melt channel into the injection space. A passage through the melt channel is closed to allow backup of melt backwards into the extruder, and the injection plunger is moved forward to inject a shot amount from the injection space into the injection mold.Type: ApplicationFiled: September 29, 2006Publication date: April 3, 2008Applicant: Krauss-Maffei Kunststofftechnik GmbHInventor: RAINER ZIMMET
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Publication number: 20070262489Abstract: Apparatus for producing injection-molded parts, particularly PET preforms, includes a twin-screw extruder or multi-screw extruder for preparing and/or plasticizing material, preferably in granular form, which is transferred to a transfer reservoir. A piston unit further processes the material. The extruder has a plurality of processing zones, whereby at least two process zones are configured as degassing zones.Type: ApplicationFiled: February 27, 2007Publication date: November 15, 2007Applicants: Berstorff GmbH, Krauss-Maffei-Kunststofftechnik GmbHInventors: Gunther Fischbach, Jens Liebhold, Markus Berndt, Rainer Zimmet, Matthias Sieverding
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Patent number: 7172407Abstract: An injection unit for an injection molding machine includes a plasticizing unit in the form of an extruder, a plunger-type injection device, which can be connected to the injection molding machine by an injection nozzle. The plunger-type injection device defines an injection space. The extruder has a forward portion which is connected to the injection space by a melt through channel in which a shutoff valve is disposed. The extruder is operated continuously and includes one or more plasticizing screws, wherein the extruder is configured in such a way that the backup length can expand backwards into the extruder, when the shutoff valve is closed.Type: GrantFiled: October 15, 2002Date of Patent: February 6, 2007Assignee: Krauss-Maffei Kunststofftechnik GmbHInventor: Rainer Zimmet
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Patent number: 7160102Abstract: An injection unit for injection molding machines includes an extruder as plasticizing unit and a plunger-type injection molding device that can be coupled to the injection molding machine by an injection nozzle. The plunger-type injection molding machine has an injection plunger, wherein the area in front of the injection plunger forms an injection space which is connected to a forward end of the extruder by a melt channel, with a shutoff valve disposed in the melt channel. The extruder can be continuously operated and has one or more plasticizing screws for plastification, wherein the extruder is so configured that a backup length is able to increase backwards into the extruder, when the shutoff valve is closed.Type: GrantFiled: October 15, 2002Date of Patent: January 9, 2007Assignee: Krauss-Maffei Kunststofftechnik GmbHInventor: Rainer Zimmet
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Patent number: 7048431Abstract: A plastics processing machine for producing fiber-containing thermoplastics includes an extruder, and a scale assembly having a weighing plate for determining an amount of fiber to be supplied to the extruder. A fiber feeding device supplies fibers from a take-off unit into the extruder and includes a first fiber guide unit, which is securely fixed to the weighing plate, for removing the fibers from the take-off unit, and a second fiber guide unit which is decoupled from the weighing plate and so constructed as to route the fibers between the first and second guide units in a substantially perpendicular relationship to a gravitational force.Type: GrantFiled: April 21, 2004Date of Patent: May 23, 2006Assignee: Krauss-Maffei Kunststoffechnik GmbHInventors: Matthias Sieverding, Jochen Zwiesele, Rainer Zimmet, Roman Laberer, Josef Sedlacek, Rainer Wolf
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Patent number: 6854968Abstract: In a compounder-type injection molding machine having an extruder for continuously producing a melt and at least one injection device is fluidly connected to the extruder to receive melt, a reservoir is provided which is in fluid communication with the extruder as well as with the injection device for temporary storage of melt. In order to maintain a pressure at a desired level at the outlet of the extruder, a pressure sensor is provided for ascertaining a melt pressure state downstream of an outlet of the extruder. The pressure sensor outputs a signal, commensurate with the melt pressure state, to a control unit for activating a drive in the reservoir or a drive in the injection device in response to the signal according a predetermined algorithm.Type: GrantFiled: October 22, 2002Date of Patent: February 15, 2005Assignee: Krauss-Maffei Kunststofftechnik GmbHInventors: Rainer Zimmet, Jochen Zwiesele, Thomas Steinherr
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Publication number: 20040234639Abstract: A plastics processing machine for producing fiber-containing thermoplastics includes an extruder, and a scale assembly having a weighing plate for determining an amount of fiber to be supplied to the extruder. A fiber feeding device supplies fibers from a take-off unit into the extruder and includes a first fiber guide unit, which is securely fixed to the weighing plate, for removing the fibers from the take-off unit, and a second fiber guide unit which is decoupled from the weighing plate and so constructed as to route the fibers between the first and second guide units in a substantially perpendicular relationship to a gravitational force.Type: ApplicationFiled: April 21, 2004Publication date: November 25, 2004Applicant: KRAUSS-MAFFEI KUNSTSTOFFTECHNIK GMBHInventors: Matthias Sieverding, Jochen Zwiesele, Rainer Zimmet, Roman Laberer, Josef Sedlacek, Rainer Wolf
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Patent number: 6648057Abstract: An apparatus for manufacturing semi-finished products and molded articles of metallic materials includes an extruder for producing a flow of the metals, with appliances being connected thereafter for shaping the semi-finished products and the molded articles. The extruder has a screw system consisting of two or more meshing screws. This design has an improved functionality and can produce components with reproducible quality.Type: GrantFiled: January 27, 2003Date of Patent: November 18, 2003Assignee: Krauss-Maffei Kunststofftechnik GmbHInventors: Andreas Dworog, Erwin Bürkle, Hans Wobbe, Rainer Zimmet, Jochen Zwiesele
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Publication number: 20030111205Abstract: An apparatus for manufacturing semi-finished products and molded articles of metallic materials includes an extruder for producing a flow of the metals, with appliances being connected thereafter for shaping the semi-finished products and the molded articles. The extruder has a screw system consisting of two or more meshing screws. This design has an improved functionality and can produce components with reproducible quality.Type: ApplicationFiled: January 27, 2003Publication date: June 19, 2003Applicant: Krauss-Maffei Kunststofftechnik GmbHInventors: Andreas Dworog, Erwin Burkle, Hans Wobbe, Rainer Zimmet, Jochen Zwiesele
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Publication number: 20030075821Abstract: In a compounder-type injection molding machine having an extruder for continuously producing a melt and at least one injection device is fluidly connected to the extruder to receive melt, a reservoir is provided which is in fluid communication with the extruder as well as with the injection device for temporary storage of melt. In order to maintain a pressure at a desired level at the outlet of the extruder, a pressure sensor is provided for ascertaining a melt pressure state downstream of an outlet of the extruder. The pressure sensor outputs a signal, commensurate with the melt pressure state, to a control unit for activating a drive in the reservoir or a drive in the injection device in response to the signal according a predetermined algorithm.Type: ApplicationFiled: October 22, 2002Publication date: April 24, 2003Applicant: KRAUSS-MAFFEI KUNSTSTOFFTECHNIK GMBHInventors: Rainer Zimmet, Jochen Zwiesele, Thomas Steinherr
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Publication number: 20030071073Abstract: An injection unit for injection molding machines includes an extruder as plasticizing unit and a plunger-type injection molding device that can be coupled to the injection molding machine by an injection nozzle. The plunger-type injection molding machine has an injection plunger, wherein the area in front of the injection plunger forms an injection space which is connected to a forward end of the extruder by a melt channel, with a shutoff valve disposed in the melt channel. The extruder can be continuously operated and has one or more plasticizing screws for plastification, wherein the extruder is so configured that a backup length is able to increase backwards into the extruder, when the shutoff valve is closed.Type: ApplicationFiled: October 15, 2002Publication date: April 17, 2003Applicant: KRAUSS-MAFFEI KUNSTSTOFFTECHNIK GMBHInventor: Rainer Zimmet
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Patent number: 6546991Abstract: The apparatus is described for manufacturing semi-finished products and molded articles of metallic materials. The device incorporates an extruder for producing a flow of the metals, with appliances being connected thereafter for shaping the semi-finished products and the molded articles. The extruder has a screw system consisting of two or more meshing screws. This design has an improved functionality and can produce components with reproducible quality.Type: GrantFiled: August 16, 2001Date of Patent: April 15, 2003Assignee: Krauss-Maffei Kunststofftechnik GmbHInventors: Andreas Dworog, Erwin Bürkle, Hans Wobbe, Rainer Zimmet, Jochen Zwiesele
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Publication number: 20030038406Abstract: An injection unit for an injection molding machine includes a plasticizing unit in the form of an extruder, a plunger-type injection device, which can be connected to the injection molding machine by an injection nozzle. The plunger-type injection device defines an injection space. The extruder has a forward portion which is connected to the injection space by a melt through channel in which a shutoff valve is disposed. The extruder is operated continuously and includes one or more plasticizing screws, wherein the extruder is configured in such a way that the backup length can expand backwards into the extruder, when the shutoff valve is closed.Type: ApplicationFiled: October 15, 2002Publication date: February 27, 2003Applicant: KRAUSS-MAFFEI KUNSTSTOFFTECHNIK GMBHInventor: Rainer Zimmet
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Publication number: 20020053416Abstract: The apparatus is described for manufacturing semi-finished products and molded articles of metallic materials. The device incorporates an extruder for producing a flow of the metals, with appliances being connected thereafter for shaping the semi-finished products and the molded articles. The extruder has a screw system consisting of two or more meshing screws. This design has an improved functionality and can produce components with reproducible quality.Type: ApplicationFiled: August 16, 2001Publication date: May 9, 2002Inventors: Andreas Dworog, Erwin Burkle, Hans Wobbe, Rainer Zimmet, Jochen Zwiesele