49797 ⎘
Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor; Component parts, details or accessories; Auxiliary operations; Means for plasticising or homogenising the moulding material or forcing it into the mould using screws; Axially movable screw; Drive means therefor using a drive screw comprising screw parts having opposite thread directions