Open Loop or Closed Loop, Electric or Hydraulic, if you want your machine to provide velocity control and consistent fill times you must run with a Delta P, no exceptions.

Some observations between molders that are surviving vs. those that are struggling

Is your injection molding machine functioning properly? For good processing or validation purposes, follow these experiments to get data on the state of your injection molding press. An "Oldie but a Goodie"

Stop blending, you are contaminating the virgin. Check out the strategy of using 100 percent regrind. You can track it, test worst case issues, have better process control and never ruin good resin,

This article describes what intensification ratio is for hydraulic machines and demonstrates a method for calculating