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Contact: lesunscrew
Zhang Qiao Industrial Zone Lu Kou street, Jiang Ning District ,Nanjing city,211113,Jiangsu Province,
Jiangsu 211113
Phone: 86 025-52646383
Fax: 86 025-52646519
E-Mail: Send Inquiry
Date/Time:  1/11/21 6:28 GMT

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.
Backward Pumping Kneading Block
Technical Details of Backward Pumping Kneading Block
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
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 screw, double screw, twin screw extruder parts, extruder
components and etc. Want to know more? Please contact us.

Minimum Order: 2 sets

Backward Pumping Kneading Block
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SOURCE: Import-Export Bulletin Board (
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