The Japan Steel Works, Ltd.

Borealis Technology Oy

Arne Syre

Carl-Gustaf Ek

Shigeki Inoue

Jari Aarila

Takayuki Yamazawa

Junichi Iwai

Yutaka Mizutani

A screw extruder having a body forming a chamber of two barrels housing two counter-rotating axis-parallel rotors, a supply port for the material to be mixed in the chamber at one end of the body, a discharge port for discharging the mixed material at the other end of the body, a conveying section with screws for feeding the material from the supply port downstream to a mixing section which comprises at least two mixing zones, each mixing zone having at least one forward-conveying wing and at least one backward-conveying wing downstream of the forward-conveying wing on each rotor characterized in that a throttle valve is provided in the chamber downstream of the mixing section, and downstream of the throttle valve a second conveying section with screws and a second mixing section are provided.

Counter-rotating twin screw extruder

Growing community of inventors

Strathelle, Norway

Arne Syre