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In profile extrusion, the product is only as good as the melt reaching the die. Trapped moisture or volatiles show up as bubbles, voids, poor surface finish and weak spots in the profile. And customers notice.
Venting is how that gas is removed. But profile lines often push for output, and when the barrel runs fuller the vent starts to flood. Ease off the vacuum to cope and the quality issues come back.
Screwtech Engineering vent port stuffers are a proven design used by many leading compounding and profiling extrusion companies. Their self-wiping twin-screw design keeps melt in the barrel while gas escapes, and precision tolerances allow full vacuum to be drawn.
For profile extruders, that means cleaner melt, and the increased extruder pressure improves porosity in the finished profile. You can improve capacity by running at higher fill levels and maintain product quality while doing it.
Less vent blockage means less costly downtime, and the easy clean two-part vacuum chamber and separate seal housing make maintenance quick when it is due. High quality stainless steel construction and an oil filled, water cooled gearbox mean the unit is built for long runs at high temperature.
Various sizes are available to suit a wide range of twin-screw and single-screw extruders. Screwtech can also design and manufacture dies using up to date 3D CAD modelling software. Talk to Screwtech Engineering about your profile line.
For more information on Vent port stuffers for profile extrusion talk to Screwtech Engineering