Patents Assigned to Tri-Delta Technology, Inc.
  • Injection molding method for filling mold and maintaining pressure
    Patent number: 4749536
    Abstract: The present invention increases the shot capacity and the screw recovery time of an injection molding machine without increasing hydraulic pump capacity or motor horsepower. In accordance with one aspect of the invention, an existing injection molding machine is retrofitted with two cylinder and piston arrangements which are bolted onto the machine between its plasticizer barrel and its melt manifold. One of the cylinder and piston arrangements is employed to perform a mold-filling operation, whereas the other cylinder and piston arrangement is employed to perform packing and suck back operations.
    Type: Grant
    Filed: July 21, 1987
    Date of Patent: June 7, 1988
    Assignee: Tri-Delta Technology, Inc.
    Inventor: John J. Farrell
  • Injection molding machine
    Patent number: 4722679
    Abstract: The present invention increases the shot capacity and the screw recovery time of an injection molding machine without increasing hydraulic pump capacity or motor horsepower. In accordance with one aspect of the invention, an existing injection molding machine is retrofitted with two cylinder and piston arrangements which are bolted onto the machine between its plasticizer barrel and its melt manifold. One of the cylinder and piston arrangements is employed to perform a mold-filling operation, whereas the other cylinder and piston arrangement is employed to perform packing and suck back operations.
    Type: Grant
    Filed: June 13, 1986
    Date of Patent: February 2, 1988
    Assignee: Tri-Delta Technology, Inc.
    Inventor: John J. Farrell