Co-rotating Twin Screws Extruder

  

2.1  L/D=40: 1

2.2  Transmission from motor to gear box will be cut off in case of overload torque.

2.3  Gear box

a)    High torque design

Ÿ  Parallel three shafts.

Ÿ  Locating bearing for Output Shaft B.

Ÿ  Taper axial bearing for Output Shaft A.

Ÿ  Large space of box body.

Ÿ  Big gear modules and high load structure

Ÿ  Shock absorption and noise control because of nodular cast iron body.

b)    Gears

Ÿ  Accuracy degree is Class 6.

Ÿ  Hard gear surface is able to bear high speed and over loading.

Ÿ  The material is 20CrNi2MoA, HRC58-62.

c)    Speed rotation: i= 3.75

d)    Output rotation speed: 5-400rpm

e)    Bearing

Ÿ  Needle bearings are German INA^®.

Ÿ  Other bearings are Japan NSK^®

f)     Lubricating system:

Ÿ  Immersed oil type.

Ÿ  Forced lubrication.

Ÿ  Outside cooler

Ÿ  Oil pump

2.4  Main motor

a)    Power: 132kw (AC)

b)    Rotation speed: 1500 rpm

c)    Beide^® SIEMENS Standard Motor Ltd.

2.5  Screw

a)    Diameter: φ71.5mm

b)    Material: Wear-resistance tool steel, vacuum quenching, HRC58-64.

c)    Modular design, exchangeable

d)    Direction of rotation: Co-rotating

e)    Screw rotation speed: 5 - 400 rpm

f)     Rectangle spline.

2.6  Spline shaft

a)    Material: 40CrNiMo (Hardness is HB260-350)

b)    Rectangle spline.

2.7  Barrel

a)    Material: Liner is wear-resistant tool steel, vacuum quenching, HRC58-64.

b)    Barrel is segmented.

c)    Barrel details

 Products photo: