Design and validation of a self-compensating melt regulator for plastics extrusion

A design for a self-adjusting melt pressure regulator is presented for use between an extruder and one or more dies. The regulator is derived from a low force valve design that enables the outlet pressure to be directly regulated by a provided force on a valve pin without need for pressure sensors or a closed loop control system. Analytical and experimental results indicate an excellent level of response and consistency given the simplicity of the design.