Patents by Inventor Stefan Kruppa

Stefan Kruppa 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).

  • Patent number: 11213986
    Abstract: A method for determining an actual volume Vr of an injection-moldable compound during an injection-molding process is disclosed. The injection-moldable compound is introduced into at least one cavity of the mould. The method includes the steps of: a) determining a theoretical volume Vt from process variables at least during a filling phase of the injection-molding process, b) determining and/or measuring at least one value for at least one compound pressure pM, c) selecting a material-specific compression k (p), corresponding to the value of pM, of the injection-moldable compound, and d) calculating an actual volume Vr by taking into account the compression k (p).
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: January 4, 2022
    Assignee: KraussMaffei Technologies GmbH
    Inventors: Reinhard Schiffers, Stefan Moser, Stefan Kruppa, Matthias Busl
  • Patent number: 11052591
    Abstract: In a method for operating an injection moulding machine in the absence of a backflow barrier, plastic melt is injected by a plasticising device into a cavity in a screw antechamber of a plasticising screw adapted to rotate about a longitudinal axis and to move translationally by a drive unit during an injection phase and a holding-pressure phase. A rotational drive of the drive unit is controlled such that a speed of the plasticising screw causes overlay of a backflow of the plastic melt from the screw antechamber back into screw threads of the plasticising screw by an opposing delivery flow as a result of a rotation of the plasticising screw due to a translational injection movement of the plasticising screw. A differential flow is established from the backflow and the opposing delivery flow and influenced at least during the injection phase by influencing the speed of the plasticising screw.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: July 6, 2021
    Assignee: KRAUSSMAFFEI TECHNOLOGIES GMBH
    Inventors: Reinhard Schiffers, Stefan Kruppa, Stefan Moser, Matthias Busl, Johannes Wortberg
  • Publication number: 20210008774
    Abstract: A method for the automatic process monitoring and/or process diagnosis of a piece-based process, in particular a production process, in particular an injection-molding process, including the steps: a) performing an automated reference finding in order to obtain reference values (r1 . . . rn) from values (x0 . . . xj) of at least one process variable; b) performing an anomaly detection on the basis of the reference values (r1 . . . rn) found in step (a); c) performing an automated cause analysis and/or an automated fault diagnosis on the basis of a qualitative model of process relationships and/or on the basis of dependencies of various process variables on each other.
    Type: Application
    Filed: March 26, 2019
    Publication date: January 14, 2021
    Inventors: Stefan KRUPPA, Stefan MOSER, Matthias BUSL, Reinhard SCHIFFERS
  • Patent number: 10245771
    Abstract: The invention relates to a method for filling a mold cavity of a molding tool in a volumetrically correct manner. A molded part/volume equivalence is ascertained during a learning phase, and production injection-molding cycles are influenced during a production phase such that the molded part/volume equivalence ascertained during the learning phase is also satisfied during the production injection-molding cycle.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: April 2, 2019
    Assignee: KRAUSSMAFFEI TECHNOLOGIES GMBH
    Inventors: Reinhard Schiffers, Stefan Moser, Stefan Kruppa
  • Publication number: 20180272586
    Abstract: A method for determining an actual volume Vr of an injection-moldable compound during an injection-molding process is disclosed. The injection-moldable compound is introduced into at least one cavity of the mould. The method includes the steps of: a) determining a theoretical volume Vt from process variables at least during a filling phase of the injection-molding process, b) determining and/or measuring at least one value for at least one compound pressure pM, c) selecting a material-specific compression k (p), corresponding to the value of pM, of the injection-moldable compound, and d) calculating an actual volume Vr by taking into account the compression k (p).
    Type: Application
    Filed: October 5, 2016
    Publication date: September 27, 2018
    Applicant: KRAUSSMAFFEI TECHNOLOGIES GMBH
    Inventors: REINHARD SCHIFFERS, STEFAN MOSER, STEFAN KRUPPA, MATTHIAS BUSL
  • Publication number: 20180169921
    Abstract: In a method for operating an injection moulding machine in the absence of a backflow barrier, plastic melt is injected by a plasticising device into a cavity in a screw antechamber of a plasticising screw adapted to rotate about a longitudinal axis and to move translationally by a drive unit during an injection phase and a holding- pressure phase. A rotational drive of the drive unit is controlled such that a speed of the plasticising screw causes overlay of a backflow of the plastic melt from the screw antechamber back into screw threads of the plasticising screw by an opposing delivery flow as a result of a rotation of the plasticising screw due to a translational injection movement of the plasticising screw. A differential flow is established from the backflow and the opposing delivery flow and influenced at least during the injection phase by influencing the speed of the plasticising screw.
    Type: Application
    Filed: July 19, 2016
    Publication date: June 21, 2018
    Applicant: KraussMaffei Technologies GmbH
    Inventors: REINHARD SCHIFFERS, STEFAN KRUPPA, STEFAN MOSER, MATTHIAS BUSL, JOHANNES WORTBERG
  • Publication number: 20160250791
    Abstract: The invention relates to a method for filling a mold cavity of a molding tool in a volumetrically correct manner. A molded part/volume equivalence is ascertained during a learning phase, and production injection-molding cycles are influenced during a production phase such that the molded part/volume equivalence ascertained during the learning phase is also satisfied during the production injection-molding cycle.
    Type: Application
    Filed: October 2, 2014
    Publication date: September 1, 2016
    Applicant: KRAUSSMAFFEI TECHNOLOGIES GMBH
    Inventors: REINHARD SCHIFFERS, STEFAN MOSER, STEFAN KRUPPA
  • Patent number: 7920880
    Abstract: The present application discloses an apparatus, system and method for reducing the time required for transmitting a multimedia message from any sender to any addressee and thus generally cut the cost of the multimedia message service.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: April 5, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Becker, Jan-Christoph Geiger, Werner Goertz, Guido Heling, Stefan Kruppa, Peter Mros, Stefan Nieder, Albert Ratermann, Stanislaus Willemsen, Marco van de Logt
  • Publication number: 20100159969
    Abstract: The present application discloses an apparatus, system and method for reducing the time required for transmitting a multimedia message from any sender to any addressee and thus generally cut the cost of the multimedia message service.
    Type: Application
    Filed: March 4, 2010
    Publication date: June 24, 2010
    Inventors: Thomas Becker, Jan-Christoph Geiger, Werner Goertz, Guido Heling, Stefan Kruppa, Peter Mros, Stefan Nieder, Albert Ratermann, Stanislaus Willemsen, Marco van de Logt
  • Patent number: 7720492
    Abstract: The present application discloses an apparatus, system and method for reducing the time required for transmitting a multimedia message from any sender to any addressee and thus generally cut the cost of the multimedia message service.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: May 18, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Becker, Jan-Christoph Geiger, Werner Goertz, Guido Heling, Stefan Kruppa, Peter Mros, Stefan Nieder, Albert Ratermann, Stanislaus Willemsen, Marco van de Logt
  • Publication number: 20060019637
    Abstract: The present application discloses an apparatus, system and method for reducing the time required for transmitting a multimedia message from any sender to any addressee and thus generally cut the cost of the multimedia message service.
    Type: Application
    Filed: February 20, 2004
    Publication date: January 26, 2006
    Inventors: Thomas Becker, Jan-Christoph Geiger, Werner Goertz, Guido Heling, Stefan Kruppa, Peter Mros, Stefan Nieder, Albert Ratermann, Stanislaus Willemsen, Marco Logt