OFS-shut-off nozzles
Do you know the problems with pulling plastic strings or afterflowing melt?
Due pressure relief after backpressure, air could get into the space in front of the screw, which causes air entrapment, streaks and burns.
The result is increasing scrap and an interrupted injection process.
These and other topics are the motivation for OFS to offer the producer a suitable solution with a versatile range of shut-off systems.
To find out which closure system might be right for you, simply follow the application examples below. You can also contact us personally. Your personal contact will be happy to advise you on the phone or on site.
shut-off function
spring operated
OFS-shut-off nozzle type FV
At a specific pressure of appr. 200 bar, the nozzle is opened and the needle gives the flow canal free.
bolt shut-off function
by double actioned cylinder
The OFS-bolt shut-off nozzle type BV has the benefits of:
- no mass separation due to single-channel technology
- no layer formation / memory effect
- can also be flanged to an existing tension rod
- low-viscosity, shear-sensitive plastics