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A blocked vent port is a pain. The vacuum stops working, moisture and volatiles stay in the melt, product quality drops and sooner or later the line has to come down so someone can dig the port out. Then it happens again next week.
Clearing the blockage is the short term fix. Stopping it from happening is the real one. Vent ports block because melt gets into them, cools, degrades and builds up. Once a skin of material forms, it catches more and the opening closes off.
The way to stop that is to keep melt out of the port in the first place. That is exactly what a vent port stuffer does. Screwtech Engineering units use a self-wiping twin-screw design. The two screws intermesh and wipe each other clean as they turn, conveying any rising material back down into the barrel.
Because nothing is allowed to sit and build up, the vent stays open. Precision tolerances let you keep a full vacuum on the port, so degassing carries on working as it should.
When it does come to routine maintenance, Screwtech makes life easier. The stuffer has an easy clean two-part vacuum chamber and a separate seal housing, so access is straightforward. High quality stainless steel construction stands up to demanding production environments.
Fewer blockages means less inconvenient and costly downtime. Screwtech supplies vent port stuffers in various sizes for twin-screw and single-screw extruders. If your vents keep closing up, talk to Screwtech Engineering about a permanent fix.
For more information on How do I fix a blocked vent port on an extruder? talk to Screwtech Engineering