Patents Assigned to Alpha Molding Technologies Associates
  • Evacuation system for injection molding machines
    Patent number: 4573900
    Abstract: An apparatus is disclosed for controlling operating pressure within a mold cavity of an injection molding die. Finely detailed, and parts having thin walls are molded with the invention providing a process for eliminating defects. There is a pressure control apparatus which is preset to provide varying degrees of negative and positive pressure during the mold cycle, and to reset to repeat the procedure for subsequent cycles. The procedure includes a cleaning stage for preparing the mold cavity for the following mold cycle.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: March 4, 1986
    Assignee: Alpha Molding Technologies Associates
    Inventor: Lyle Smith