49615 ⎘
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; Moulds; Sprue channels Runner channels or runner nozzles; Details not specific to hot or cold runner channels; Means for controlling the runner flow, e.g. runner switches, adjustable runners or gates rotatable sprue bushings or runner channels for controlling runner flow in one cavity