Twin screw extruder
From Plastics Wiki, free encyclopedia
Twin screw extruder Two screws, side by side, are placed within the extruder barrel; they are either counter-rotating or co-rotating. Counter-rotating twin screw extruders are used primarily for processing PVC products such as pipe, siding, sheet, pellets, and film. The co-rotating units are used for compounding materials where thorough mixing and high output rates are important. The twin screw unit resembles a positive displacement screw pump. It conveys the material at low speeds with controlled shear. The positive action assures that all portions of the material experience a uniform residence time.
Suppliers of Twin Screw Extruders
- Werner & Pfleiderer
- Leistritz
- Theysohn Extrusionstechnik
- Battenfeld
- Reifenhauser
- Cincinnati
- Ermafa
- Plama
- Amut
- Krauss-Maffei
- Dr. COLLIN
- R.S.ENGINEERSlink title
- ThermoFisher Scientific [1]
Examples
Process: Sheet extrusion • Profile extrusion • Pipe extrusion • Blown film extrusion • Cast film extrusion • Foam extrusion • Twin screw extrusion • Adiabatic extrusion • Coextrusion
Equipment: Plastic extruder • Feedscrew • Single screw extruder • Twin screw extruder • Extrusion machine manufacturers
See also: Plastic thermoforming • Blow molding • Plastic welding • Injection molding • Rotational molding
