Patents Assigned to Kloeckner Ferromatik des GmbH
  • Patent number: 4994220
    Abstract: A process and apparatus for injection molding of injection molded parts of plasticized material, in particular plasticized liquid crystal polymers, in which the plasticized material is injected into the mold cavity of a closed injection mold having at least two spaced apart infeed gates, separate plastification and injection devices being associated with each of the gates. The plasticized material may be further injected into the mold cavity to compensate for any shrinkage during cooling of the molded material. Injection is carried out by at least one of the devices which causes the material to flow into the cavity via one of the gates associated therewith for filling the cavity and causing the material to partially flow from the cavity via the other of the gates in the direction of the other of the devices associated therewith.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: February 19, 1991
    Assignee: Kloeckner Ferromatik des GmbH
    Inventors: Lothar Gutjahr, Wolfgang Nesch