Pneumatically shut-off nozzle can create a flawless gate with no drooling and no stringing. Gate only leaves a small witness ring.
The large gate openings are possible. This makes processing at high-flow rates much easier.
The valve pin can be closed allowing plastification during mold open stages.
No stringing, no drooling, no residue in the gate. Very good gate mark.
Because it can provide bigger gate size, therefore it is very suitable for big size injection molding. Also lower injection pressure and less stress during molding.
A sequence controlled valve gate system could help produce a no weld line part.