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Twin Screw Extrusion Workshop
Next Twin Screw Extrusion Workshop scheduled for Nov. 30-
Dec. 1, 2005 - includes presentations by outside industry experts
The Leistritz Twin Screw Extrusion Workshop provides an in-depth review of twin
screw extrusion theory and practices. A unique facet of the program is that
classroom training is combined with "hands-on" operating experience. A partial list
of topics is as follows:
Twin screw extruder theory and design Direct extrusion for sheet, film, fibers
and profiles
Screw design and process techniques for mixing and devolatilization Process considerations for reactive
extrusion
Applications for co-rotation and
counterrotation Troubleshooting twin screw extruders
and systems
Sequencing of multi-stage process
operations Control and monitoring options
Scale-up of the twin screw extrusion
process Screw assembly and disassembly
Feeder and materials handling for
pellets, powders and liquids Machine maintenance
Pelletizing options: strand cut,
water ring, and underwater Twin screw extrusion applied to
medical and pharmaceutical applications
"Hands-on" demonstrations at Leistritz NJ process laboratory:
Hands-on demonstrations at Leistritz NJ process Co-rotating and
counterrotating twin screw extruders
w/ up to 1200+ screws rpm
Devolatilization of polymers
Foam extrusion via gas injection
Downstream addition of fillers, fibers
and additives Direct sheet/film extrusion with gear
pump front end
Outside speakers will include:
David Todd, Polymer Processing
Institute Dave Wilson, K-Tron
Tom Cunningham, Extrusion
Technical Services Keith Luker, Randcastle
Extrusion Systems
Adam Dreiblatt, Extrusioneering
International Pete Palmer, Wolock & Lott
Suzann Smith, Dynisco Tom Kernstock, ScheerBay
Upcoming dates: June 22-23 and Nov. 30- Dec. 1 2005
Place: Classroom sessions are held at the Holiday Inn in Clinton, NJ, and machinery
demonstrations at the Leistritz Process Laboratory (10 minutes away)
Cost: $780, includes handout materials, lunches, and dinner on day 1
New oil sealed re-circulating
vacuum pump system eliminates
environmental problems
associated with waste water disposal
Recirculating oil sealed vacuum pump packages
are replacing once-through water sealed vacuum
pumps to pull vacuum from extruder vents to
enhance devolatilization efficiencies. The oil
sealed pump typically can be operated 2 to 6
months before the oil needs to be replaced.
The main advantage of the oil sealed design is
that it eliminates the environmental concerns
associated with water disposal from the water
sealed pump.
The system includes a TEFC motor and oil
reservoir equipped with filter, sight glass and
drain valve. The oil is cooled by a fan driven by
the pump motor. A knock-out pot with filter is
situated between the extruder vent and pump,
and all components are mounted on a base plate.
The same pump can service multiple vents.
Two traps/filter (w/quick disconnects) and a
3-way valve can also be used with the same
pump to facilitate maintenance/changeover
while processing. Custom systems may be
specified with dry filters, liquid separators,
chilled liquid condensers, and closed loop
vacuum level adjustment.
