Our operator has noticed that he has to wait five or six seconds for the sprue from the previous cycle to melt back into the nozzle. Why is it taking so long?
In your “sprue” type of operation, the sprue should melt quickly and completely back into the nozzle within one to two seconds after the operating head and tool retract from the nozzle. If it takes longer to melt, the nozzle is too cold. If it is melting faster, the nozzle is too hot. A hot nozzle may cause the sprue to stick in the sprue hole and plug it.
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