Backward Pumping Kneading Block

The backward pumping kneading block plays a role of adjusting the fullness
of the material and extending the residence time of the material in the
barrel during the material mixing. Its blocking force is weaker than the
reverse feed screw sleeve, but slightly stronger than the 90 ° kneading
block. Which area should choose the backward pumping kneading block? How to
use it with the reverse screw sleeve in the full length? How many reverse
elements should be selected for the full length of the screw? All of these
questions are testing the experience and skill of the modification engineer,
which has a considerable impact on the quality of the modified special
material or masterbatch. For example, in the case of nylon (PA66) flame
retardant enhanced modification, the first kneading zone must be stringed by
four kneading blocks (such as 30 ° + 45 ° + 45 ° ++ 45 ° L), and must be
finished by 45 ° L blocks Stuffing, the whole machine can stably plasticize
and stably extrude the PA66, a strong crystalline plastic.

Technical Details of Backward Pumping Kneading Block
Brand：LESUN
Model：φ20 mm ~φ300 mm
Material：38CrMoALA / W6Mo5Cr4V2 / HIP
Properties: Wear-resisting, Corrode-resisting
Application: Extruder
Backward Pumping Kneading Block Function
1. Good peformance on shearing material.
2. Good mixing ability to support blending process.
Processing Characteristics of Backward Pumping Kneading Block:
1. All component materials are purcharsed from professional material
supplier. To ensure quality of raw materials, element and metallographic
analysis are coducted.
2. All components are finished by CNC grinding.
3. Professional technical team can provide surveying and mapping business.

Nanjing Lesun Screw Co.,Ltd is a professional screw and barrel manufacturer.
We provide extruder barrel, hexagonal shaft, Extruder Spare Parts, kneading
block and so on. Want to know about extruder screw price? Please contact us.

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