direct gate maintenance
direct gate maintenance
(OP)
Do direct valve gates require more maintenance than submarine edge gates? We tranistioned about 2 yrs ago to valve gates on a small but detailed tight tolerance PolyCarb part that requires significant packing to reduce sink. Since intorducing the valve gate, I've seen a lot more problems with stringing that required gate repairs. Should this be expected?






RE: direct gate maintenance
Mike Halloran
Pembroke Pines, FL, USA
RE: direct gate maintenance
It is not sensitive to drool and it is sensitive to shear.
Valves increase cost, increase complexity and increase shear, to increase control of a variable that is never a problem.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: direct gate maintenance
Submarine gates are pretty good and rarely need maintenance unless you use a glass filled material where a lot of wear happens. The only down side to this type of gate when moulding PC is the risk of gate bloom or cold slug flow lines, but depending on the part this can normally be processed out.
RE: direct gate maintenance
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.