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The working principle of the conical double-screw plastic extruder

點擊次數:   更新時間:15/11/18 14:01:11     來源:關閉分    享:

   Conical twin-screw extruder is divided into synthetic conical twin screw extruder and the conical anisotropic twin screw extruder.

    When the conical synthetic twin-screw extruder at work the two screws rotate in the same direction. The difference is add an intermediate gear in the distribution box to compare with conical anisotropic twin screw extruder , to achieve the effect of the two screw Synthetic rotation. It can meet the requirements of material processing in a large part.

    The main technology parameters of the twin screw extruder

1, The nominal diameter of the screw. Screw nominal diameter is the screw outer diameter, the unit is mm. For variable diameter (or conical) screw, the screw diameter is a change numerical  value, it usually with minimum diameter and max diameter represent such as: 65/130. The bigger double screw diameter, the greater capacity of the symbol machine.  

2,The screw length-diameter ratio. The screw length-diameter ratio is the ratio of the effective length and the diameter of the screw. The unitary double-screw extruder length-diameter ratio  is between 7 to 18. For modular twin-screw extruder, the length-diameter ratio is variable.From the view of development, the length-diameter ratio has a tendency to gradually boost.  

3,The change direction of screw. The change direction of screw is divided into have syntropy and incongruous. General synthetic rotating twin screw extruder is used for mixing, incongruous rotation of extruder is used for extrusion products.  

4, Screw speed range. The screw speed range means the range of low speed to high speed screw (value). Synthetic rotating twin screw extruder can be high speed rotating,the general speed of  incongruous rotation extruder only 0-40 r/min.  

5, Driving power.The driving power means the motor power of the driving screw, the unit is kw.  

6, Output. Output means the material extrusion amount per hour, the unit is kg/h.  

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