Patents by Inventor Robert D. Schad

Robert D. Schad 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).

  • Publication number: 20220134620
    Abstract: An injection molding machine includes a machine base extending along a horizontal machine axis; a stationary platen fixed to the base; a moving platen supported by the base; a center section supported by the base axially intermediate the stationary and moving platens; at least one mold stroke actuator for translating the moving platen and the center section along the machine axis between a mold-open position and a mold-closed position; a two-stage first injection unit supported by the base behind the stationary platen for injecting a first resin through the stationary platen; and a two-stage second injection unit supported by the base behind the moving platen for injecting a second resin through the moving platen. The second injection unit is translatable along the machine axis to accommodate translation of the moving platen during movement between the mold-open and mold-closed positions.
    Type: Application
    Filed: January 19, 2022
    Publication date: May 5, 2022
    Inventors: Robert D. Schad, Roberto Sicilia
  • Patent number: 11298859
    Abstract: A method for injection molding comprises forming a set of first articles in a mold of an injection molding machine and forming a set of second articles in the mold of the injection molding machine. The method includes transferring the set of first articles from the mold to a first set of first receivers of a tooling plate, and then moving the first set of first receivers to align with the set of second articles. Thereafter the set of second articles is transferred from the mold toward the first set of first receivers and into assembled condition with the set of first articles held in the first set of first receivers.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: April 12, 2022
    Assignee: Niigon Machines Ltd.
    Inventor: Robert D. Schad
  • Patent number: 11235501
    Abstract: An injection molding machine includes a machine base extending along a horizontal machine axis; a stationary platen fixed to the base; a moving platen supported by the base; a center section supported by the base axially intermediate the stationary and moving platens; at least one mold stroke actuator for translating the moving platen and the center section along the machine axis between a mold-open position and a mold-closed position; a two-stage first injection unit supported by the base behind the stationary platen for injecting a first resin through the stationary platen; and a two-stage second injection unit supported by the base behind the moving platen for injecting a second resin through the moving platen. The second injection unit is translatable along the machine axis to accommodate translation of the moving platen during movement between the mold-open and mold-closed positions.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: February 1, 2022
    Assignee: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Roberto Sicilia
  • Patent number: 11230040
    Abstract: A platen apparatus for supporting a mold portion in an injection molding machine includes a platen body and a mold mounting face adjacent a front of the platen body for supporting a mold half. The mold mounting face includes a rotary central surface that is rotatable about an axis relative to the platen body and a fixed peripheral surface that is fixed relative to the platen body. The peripheral surface is disposed about a periphery of the central surface. The central surface and the peripheral surface are alignable in a common vertical plane.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: January 25, 2022
    Assignee: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Carsten Link, Hemant Kumar
  • Publication number: 20210347100
    Abstract: A two-platen clamp apparatus for an injection molding machine includes a first platen having a first mold mounting surface and a second platen having a second mold mounting surface. A first rail and a second rail extend parallel to each other and to a machine axis, the first and second rails disposed at a rail elevation vertically below the machine axis. The second platen is slidably coupled to the first and second rails and translatable between mold-closed and mold-open positions. At least one force-exertion member is coupled to the second platen for clamping the first and second platens together, each clamping force exerted along an axis parallel to and offset vertically below the machine axis. At least one force-reaction member is coupled to the first and second platens for resisting separation of upper portions of the first and second mold mounting surfaces during exertion of the clamping force, each of the at least one force reaction member disposed at an elevation below the machine axis.
    Type: Application
    Filed: July 20, 2021
    Publication date: November 11, 2021
    Applicant: NIGON MACHINES LTD.
    Inventors: Robert D. Schad, Michael Goriup, Hemant Kumar, Martin Kestle, Brandon Winkels, Carsten Link
  • Patent number: 11167463
    Abstract: An injection molding machine includes a first mold section comprising mold cores for forming threaded articles, the first mold cores movable between a molding position for interacting with a second mold section in a mold area to form the threaded articles, and an auxiliary position outside the mold area, and a removal device for removing the threaded articles from the mold cores. The removal device includes a plurality of unscrewing chucks for engaging the threaded articles when the mold cores are in the auxiliary position. The chucks are supported by a carrier plate and each chuck is rotatable about a respective unscrewing axis. The removal device further includes an orbiting plate coupled to the unscrewing chucks by respective crank arms, the orbiting plate effecting synchronized rotation of the unscrewing chucks via the crank arms for unscrewing the threaded articles from the mold cores.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: November 9, 2021
    Assignee: NIIGON MACHINES LTD.
    Inventors: Robert D. Schad, Luke Osmokrovic
  • Patent number: 11167460
    Abstract: An injection molding machine includes a stationary platen and a moving platen mounted on a machine base, and a rotary apparatus for rotatably supporting a center mold section. The rotary apparatus includes a carriage body including a carriage upper portion supported by first and second carriage rails, and a carriage lower portion extending downward from the carriage upper portion laterally intermediate the first and second carriage rails. The rotary apparatus further includes a rotary table mounted atop the carriage body for rotatably supporting the center mold section. The rotary table is mounted to the carriage body by a rotary table bearing having a combination of bearing elements to bear axial, rotational, and moment loads. The machine further includes a plurality of tie bars extending between the moving platen and the stationary platen. The tie bars are free from engagement by the rotary apparatus.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: November 9, 2021
    Assignee: NIIGON MACHINES LTD.
    Inventors: Robert D. Schad, Carsten Link, Hemant Kumar
  • Patent number: 11090849
    Abstract: A method for receiving and ejecting molded articles includes: (a) drawing air from a cooling tube cavity into an air channel through a plate bore to draw at least a portion of a molded article into the cavity; (b) moving a valve within the plate bore from a first position for conducting air from the cavity to the air channel to a second position for reducing air flow through the plate bore relative to the first position; and (c) when the valve is in the second position, urging pressurized air from the air channel to the cavity through the plate bore to assist ejection of the molded article from the cavity.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: August 17, 2021
    Assignee: NIIGON MACHINES LTD.
    Inventors: Robert D. Schad, Roberto Sicilia
  • Publication number: 20210078225
    Abstract: A platen apparatus for a mold center section of an injection molding machine includes a first mold mounting surface on a first front face of a first wall, the first mold mounting surface for supporting a first mold section, and a second mold mounting surface on a second front face of a second wall, the second wall spaced apart from the first wall in an axial direction and providing a generally hollow chamber therebetween. The second mold mounting surface is for supporting a second mold section and is directed away from the first mold mounting surface. The platen apparatus further includes a plurality of compression members extending between the first and second walls for maintaining a wall spacing between the first and second walls, and an ejector assembly mounted between the first and second walls for ejecting molded articles from the first and second mold sections.
    Type: Application
    Filed: December 1, 2020
    Publication date: March 18, 2021
    Applicant: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Carsten Link, Hemant Kumar
  • Publication number: 20210046684
    Abstract: A clamp assembly for an injection molding machine includes a clamp piston slidable within a housing among a clamping position, a mold break position, and a meshing position disposed axially intermediate the clamping and the mold break positions. A clamp chamber urges the clamp piston towards the clamping position when pressurized, and a return device urges the clamp piston from the clamping position to the meshing position when pressure in the clamp chamber is relieved. At least one mold break actuator is coupled to a mold break engagement surface disposed within the housing. The mold break actuator is adjustable to accommodate retraction of mold break surface when the clamp piston moves to the clamping position, and to forcefully push the mold break surface forward against the clamp piston when moving the clamp piston to the mold break position.
    Type: Application
    Filed: October 2, 2020
    Publication date: February 18, 2021
    Applicant: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Hemant Kumar, Calin Pavel, Carsten Link, Marc Ricke
  • Publication number: 20200206996
    Abstract: An injection unit for an injection molding machine includes a cylindrical body rotatably supported in a housing interior for rotational coupling with a plasticizing screw. The cylindrical body is fixed to rotate with the plasticizing screw about an injection axis. A gear train in the housing includes a central gear mounted about, and fixed to rotate with, the cylindrical body, the central gear having an uppermost extent vertically above the injection axis and opposed first and second lateral extents on horizontally opposed sides of the injection axis. A rotary drive for powering rotation of the plasticizing screw includes a first motor having a first motor shaft rotatable about a first motor axis, the first motor axis parallel to the injection axis, the first motor axis at a first elevation below the uppermost extent of the central gear, and laterally outboard of the first lateral extent of the central gear.
    Type: Application
    Filed: March 6, 2020
    Publication date: July 2, 2020
    Applicant: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Patrick Roessler, Brandon Winkels, Jonathan Alt, Carsten Link
  • Patent number: 10532506
    Abstract: A clamp assembly for an injection molding machine includes (a) a clamp cylinder housing and (b) a clamp piston affixed to an end portion of a tie bar and slidable within the housing among a clamping position, a mold break position, and a meshing position disposed axially intermediate the clamping and the mold break positions. The clamp assembly further includes (c) a clamp chamber for urging the clamp piston towards the clamping position when pressurized; (d) a return device for urging the clamp piston towards the meshing position when pressure in the clamp chamber is relieved; and (e) a mold break chamber for urging the clamp piston towards the mold break position when pressurized. The mold break chamber is bounded axially by opposed surfaces of the tie bar and the return device.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: January 14, 2020
    Assignee: NIIGON MACHINES LTD.
    Inventors: Carsten Link, Robert D. Schad, Luke Osmokrovic
  • Publication number: 20190366609
    Abstract: An injection molding machine includes a machine base extending along a horizontal machine axis; a stationary platen fixed to the base; a moving platen supported by the base; a center section supported by the base axially intermediate the stationary and moving platens; at least one mold stroke actuator for translating the moving platen and the center section along the machine axis between a mold-open position and a mold-closed position; a two-stage first injection unit supported by the base behind the stationary platen for injecting a first resin through the stationary platen; and a two-stage second injection unit supported by the base behind the moving platen for injecting a second resin through the moving platen. The second injection unit is translatable along the machine axis to accommodate translation of the moving platen during movement between the mold-open and mold-closed positions.
    Type: Application
    Filed: August 15, 2019
    Publication date: December 5, 2019
    Applicant: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Roberto Sicilia
  • Publication number: 20190283299
    Abstract: A method for receiving and ejecting molded articles includes: (a) drawing air from a cooling tube cavity into an air channel through a plate bore to draw at least a portion of a molded article into the cavity; (b) moving a valve within the plate bore from a first position for conducting air from the cavity to the air channel to a second position for reducing air flow through the plate bore relative to the first position; and (c) when the valve is in the second position, urging pressurized air from the air channel to the cavity through the plate bore to assist ejection of the molded article from the cavity.
    Type: Application
    Filed: June 3, 2019
    Publication date: September 19, 2019
    Applicant: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Roberto Sicilia
  • Publication number: 20190224892
    Abstract: A method for injection molding comprises forming a set of first articles in a mold of an injection molding machine and forming a set of second articles in the mold of the injection molding machine. The method includes transferring the set of first articles from the mold to a first set of first receivers of a tooling plate, and then moving the first set of first receivers to align with the set of second articles. Thereafter the set of second articles is transferred from the mold toward the first set of first receivers and into assembled condition with the set of first articles held in the first set of first receivers.
    Type: Application
    Filed: April 2, 2019
    Publication date: July 25, 2019
    Applicant: Niigon Machines Ltd.
    Inventor: Robert D. Schad
  • Patent number: 10357911
    Abstract: A cooling plate assembly includes (a) a cooling plate having a plate front surface; (b) an air channel extending within a thickness of the cooling plate; (c) a plate bore extending into the cooling plate from the plate front surface for providing fluid communication between the air channel and a cavity of a cooling tube mountable to the cooling plate; and (d) a valve within the plate bore. The valve is movable between a first position in which a first air flow passage extending within the plate bore is open for conducting air from the cavity to the air channel, and a second position in which the first air flow passage is obstructed to reduce air flow between the cavity and the air channel, and in which a second air flow passage extending within the plate bore is open for conducting air from the air channel to the cavity.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: July 23, 2019
    Assignee: NIIGON MACHINES LTD.
    Inventors: Robert D. Schad, Roberto Sicilia
  • Publication number: 20190202097
    Abstract: An injection molding machine includes a first mold section comprising mold cores for forming threaded articles, the first mold cores movable between a molding position for interacting with a second mold section in a mold area to form the threaded articles, and an auxiliary position outside the mold area, and a removal device for removing the threaded articles from the mold cores. The removal device includes a plurality of unscrewing chucks for engaging the threaded articles when the mold cores are in the auxiliary position. The chucks are supported by a carrier plate and each chuck is rotatable about a respective unscrewing axis. The removal device further includes an orbiting plate coupled to the unscrewing chucks by respective crank arms, the orbiting plate effecting synchronized rotation of the unscrewing chucks via the crank arms for unscrewing the threaded articles from the mold cores.
    Type: Application
    Filed: March 8, 2019
    Publication date: July 4, 2019
    Applicant: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Luke Osmokrovic
  • Publication number: 20190152108
    Abstract: A method for cooling molded preforms includes transferring preforms of a first injection cycle from a mold to retained engagement on a take-out plate, the preforms having exterior surfaces and interior surfaces targeted for cooling. The preforms are released from cooling tubes of the take-out plate to retained engagement on cooling pins of a transfer shell spaced away from the mold. The transfer shell rotates and the preforms are released from the transfer shell to retained engagement in supplemental tubes of a supplemental cooling device. After a period of time the preforms are released from the supplemental cooling device and transferred back to retained engagement on the transfer shell. The transfer shell rotates to an unload position to eject the preforms from the transfer shell for evacuation from the machine.
    Type: Application
    Filed: January 18, 2019
    Publication date: May 23, 2019
    Applicant: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Daniel Jung, Michael Anthony Tedesco
  • Publication number: 20190118436
    Abstract: An injection molding machine includes a stationary platen and a moving platen mounted on a machine base, and a rotary apparatus for rotatably supporting a center mold section. The rotary apparatus includes a carriage body including a carriage upper portion supported by first and second carriage rails, and a carriage lower portion extending downward from the carriage upper portion laterally intermediate the first and second carriage rails. The rotary apparatus further includes a rotary table mounted atop the carriage body for rotatably supporting the center mold section. The rotary table is mounted to the carriage body by a rotary table bearing having a combination of bearing elements to bear axial, rotational, and moment loads. The machine further includes a plurality of tie bars extending between the moving platen and the stationary platen. The tie bars are free from engagement by the rotary apparatus.
    Type: Application
    Filed: December 7, 2018
    Publication date: April 25, 2019
    Applicant: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Carsten Link, Hemant Kumar
  • Publication number: 20190105823
    Abstract: An injection molding machine includes a machine base; a stationary platen fixed to the base for holding a stationary mold section; a moving platen slidably supported by the base for holding a moving mold section; a rotary apparatus slidably supported by the base axially intermediate the stationary and moving platens for supporting a plurality of center mold sections and moving the center mold sections among axial positions directed toward the stationary and moving mold sections and lateral positions directed toward the operator and non-operator side of the machine; and a part-handling apparatus mounted to the stationary platen. The part-handling apparatus includes an end-of-arm tooling disposed laterally outboard of the rotary apparatus. The end-of-arm tooling is movable laterally between an engaged position for interacting with molded articles in one of the center mold sections in the lateral positions, and a disengaged position spaced laterally outwardly from the engaged position.
    Type: Application
    Filed: December 7, 2018
    Publication date: April 11, 2019
    Applicant: Niigon Machines Ltd.
    Inventors: Robert D. Schad, Luke Osmokrovic, Carsten Link