For processing thermoplastics
The RS-injection unit has a rotating and axially moving screw. During plasticising, the screw moves axially to the rear, so that the compound is conveyed into the area in front of the screw tip. Once dosing of the preselected volume is complete, the compound is injected into the mould by the advancing screw - the tip of which is equipped with a non-return valve. The screw movement is pressure and speed controlled by a servo valve. In conjunction with high-resolution potentiometers, this results in high positioning accuracy, which guarantees a reproducible fill quantity in every cycle. The heating of the injection unit is done by independently controlled heating strips with self-optimising controllers.