Patent ID: 8501059

Claim:
A method ( 300 ) of controlling melt pressure at a filter outlet ( 113 ) of a melt filter ( 112 ) in an injection unit ( 100 ) having an extruder ( 102 ) that is connectable to a melt accumulator ( 122 ) via the melt filter ( 112 ), the melt accumulator ( 122 ) having an injection plunger actuator ( 130 ), the melt filter ( 112 ) being associated with a target melt pressure range, the method executable at a controller ( 126 ) associated with the injection unit ( 100 ), the method ( 300 ) comprising: appreciating ( 310 ) an indication of an actual melt pressure associated with the filter outlet ( 113 ); responsive to the actual melt pressure not being within the target melt pressure range, determining ( 320 ) a remedial parameter that is instrumental in bringing the actual melt pressure within the target melt pressure range; releasing ( 330 ) a control signal, the control signal based on the remedial parameter, the control signal configured to execute an action associated with the remedial parameter, thereby causing the actual melt pressure at the filter outlet ( 113 ) to fall within the target melt pressure range, the control signal for controlling the amount of compressible fluid exiting a cylinder associated with the injector plunger actuator ( 130 ).