Patent Number: 6,309,571

Title: Method and apparatus for the control of injection molding

Abstract: This invention relates to a method and apparatus for the control of injection molding and, in particular, for determining a suitable time for transfer from injection velocity control to packing pressure control. The invention uses a derivative of, preferably the nozzle pressure, and inputs this to a fuzzy inference system. The fuzzy inference system uses said rules and knowledge to provide a suitable transfer time as an output. It is preferred that the sample pressure is filtered prior to calculation of the derivative.

Inventors: Gao; Furong (Kowloon, HN), Zhao; Chunhua (West Lafayette, IN)

Assignee: The Hong Kong University of Science & Technology

International Classification: B29C 45/77 (20060101); B29C 045/77 ()

Expiration Date: 10/30/2018