Dual screw extruder is composed by power transmitting device, material feeding device, barrel and screws. The functions of every part are similar to the single screw extruder. The screws used for profile extruding are tightened engage together and counter rotate. In some special condition the screws co-rotate at lower rotating speed which is about 10RPM. High speed engaging and co-rotating facility is used in mixing, gas drainage or as the chemical reactor whose max rotating speed is 300-600 RPM.
Multi group heaters are applied in dual screw extruding system to control the stability of melted material, increase extruding speed. It helps greatly in material modification. Ratio feeding regularly works together with dual screw high speed extruder performs a very important role for the stability of large power forming machine.
Non-engaging extruder is different to the engaging extruder which is used in gas drainage, mixing and chemical reaction. The transmitting principle of non-engaging extruder is also different to the engaging type which is similar to the extruding principle with single screw extruder. They are totally different.
|(r/min) Screw Speed||1-37||1-34.7||1-36.9||1-36.9|
|(mm） Screw effective Length||1065||1430||2082||2520|
|(kw) Main Power||18.5||37||55||90|
|(kw) Heating Power||10||24||36||48|