I received a blog response which highlights a growing trend in the molding industry…
I am using a pressure sensor at the End of Fill on a new all-electric molding machine. With a DIII process, I am having good success in using the pressure at the end of fill for V/P transfer. This works well with a standard deviation of 0.07mm for cushion.
note: For more on a DIII process, please read: Rules for a DIII Process
The advent of highly-responsive all-electric injection molding machines is allowing people to control the process in very unique ways to fit a specific situation. Using the cavity pressure at the end of fill to transfer from velocity control to pressure control can be a great way of controlling the amount of pressure which is received within the mold cavity during the mold cycle.
The biggest concern with this approach is the response of the machine. Most hydraulic molding machines lack the response time to facilitate the correctly use of an end of fill sensor.