Method for simultaneous closed loop control of gas assist and gas counter pressure in an injection molding process relative to plastic melt pressure and plastic melt flow position

• Main Authors: Lawless, III, William Francis, Altonen, Gene Michael, Hanson, III, H. Kenneth, Huang, Chow-Chi
• Format: Patent
• Language: English
• Published: 08.08.2023
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A controller for an injection molding system is in communication with a melt flow control unit, a gas assist control unit, and a gas counter pressure control unit. The controller can effect real-time adjustments to gas assist pressure and/or gas counter pressure as a function of melt pressure or flow front position.