Screw Elements
Product Name: Kneading Block
Model：φ15 mm ~φ250mm
Applicable brands：Coperion, Leistritz, KraussMaffei, JSW, Toshiba, Baker Perkins, SM Platek, Wenger,Clextral, Bühler，
BUSS，etc.
Material: Tool steel, HIP, stainless steel, nickel-based alloy, cobalt-based alloy, etc.
Properties:Wear-resisting, Corrode-resisting and durable
Applications:
lThe 30° Standard Kneading Block, with a smaller staggering angle, produces relatively weak shearing action but effective distribution mixing. It is mainly used for initial distribution mixing of materials to ensure uniform spatial distribution of components. It is suitable for situations requiring weak shearing action but good distribution mixing, such as initial mixing in the melting section.
lThe 45° Standard Kneading Block, with a moderate staggering angle, provides both shearing action and good distribution mixing effects. It is primarily used for shearing, refining, and dispersive mixing of materials, breaking down components into particles or achieving the required dispersion phase size for incompatible components. It is widely used in the mixing section and is an ideal choice for enhancing shearing and dispersive mixing, especially suitable for the dispersion of inorganic nanoparticles in polymer melts.
lThe 60° Standard Kneading Block, with a larger staggering angle, produces strong shearing action but relatively weak distribution mixing effects. It is mainly used for intense shearing and refining of materials to make particles smaller and more uniform. It is suitable for situations requiring strong shearing action, such as mixing and homogenization of certain special material.
Backward pumping kneading block aligns staggered disks with reverse screw, conveys material oppositely, generates backpressure and leakage flow, regulating filling degree and residence time for optimized mixing.
Structure Characteristics:
The spiral angle formed by the staggered arrangement of kneading disks, which is consistent with the spiral direction of the reverse screw element, is called the backward pumping kneading block.
Functions:
The reverse action obstructs the forward conveyance of materials, mainly extending their residence time in the barrel, thereby increasing filling degree and material pressure, greatly enhancing mixing effects. The backward pumping kneading block generates backpressure, converting its total flow into leakage flow and increasing the fill level of materials in the upstream screw conveying elements. During the melting process, the use of the backward pumping kneading block can affect the melting effect and energy consumption of polymers. When the resistance of the backward pumping kneading block is high, the residence time of materials within it is extended, contributing to complete melting of the polymers. However, excessive resistance may also lead to overheating of the polymer melt, which is unfavorable for the mixing and molding processes. Therefore, the design of the backward pumping kneading block needs to be specifically adjusted according to the requirements of screw speed and feed rate to ensure material fill level and residence time, optimizing and saving energy in the polymer melting process.
Applications:
Backward pumping kneading blocks have a wide range of applications in the field of plastic processing. They are mainly used for high-fill modifications to ensure uniform dispersion of fillers in plastics, enhancing product performance; in color masterbatch preparation, they ensure uniform distribution of pigments or dyes to avoid color differences; additionally, in reactive extrusion processes, backward pumping kneading blocks provide necessary shearing and mixing actions to promote chemical reactions. Their intense shearing and mixing effects, along with the ability to generate backpressure, make them the preferred choice for processing materials with high viscosity and high shear requirements, widely used in various high-end plastic processing applications.
Screw Elements
Product Name: Kneading Block
Model：φ15 mm ~φ250mm
Applicable brands：Coperion, Leistritz, KraussMaffei, JSW, Toshiba, Baker Perkins, SM Platek, Wenger,Clextral, Bühler，
BUSS，etc.
Material: Tool steel, HIP, stainless steel, nickel-based alloy, cobalt-based alloy, etc.
Properties:Wear-resisting, Corrode-resisting and durable
Applications:
lThe 30° Standard Kneading Block, with a smaller staggering angle, produces relatively weak shearing action but effective distribution mixing. It is mainly used for initial distribution mixing of materials to ensure uniform spatial distribution of components. It is suitable for situations requiring weak shearing action but good distribution mixing, such as initial mixing in the melting section.
lThe 45° Standard Kneading Block, with a moderate staggering angle, provides both shearing action and good distribution mixing effects. It is primarily used for shearing, refining, and dispersive mixing of materials, breaking down components into particles or achieving the required dispersion phase size for incompatible components. It is widely used in the mixing section and is an ideal choice for enhancing shearing and dispersive mixing, especially suitable for the dispersion of inorganic nanoparticles in polymer melts.
lThe 60° Standard Kneading Block, with a larger staggering angle, produces strong shearing action but relatively weak distribution mixing effects. It is mainly used for intense shearing and refining of materials to make particles smaller and more uniform. It is suitable for situations requiring strong shearing action, such as mixing and homogenization of certain special material.
Backward pumping kneading block aligns staggered disks with reverse screw, conveys material oppositely, generates backpressure and leakage flow, regulating filling degree and residence time for optimized mixing.
Structure Characteristics:
The spiral angle formed by the staggered arrangement of kneading disks, which is consistent with the spiral direction of the reverse screw element, is called the backward pumping kneading block.
Functions:
The reverse action obstructs the forward conveyance of materials, mainly extending their residence time in the barrel, thereby increasing filling degree and material pressure, greatly enhancing mixing effects. The backward pumping kneading block generates backpressure, converting its total flow into leakage flow and increasing the fill level of materials in the upstream screw conveying elements. During the melting process, the use of the backward pumping kneading block can affect the melting effect and energy consumption of polymers. When the resistance of the backward pumping kneading block is high, the residence time of materials within it is extended, contributing to complete melting of the polymers. However, excessive resistance may also lead to overheating of the polymer melt, which is unfavorable for the mixing and molding processes. Therefore, the design of the backward pumping kneading block needs to be specifically adjusted according to the requirements of screw speed and feed rate to ensure material fill level and residence time, optimizing and saving energy in the polymer melting process.
Applications:
Backward pumping kneading blocks have a wide range of applications in the field of plastic processing. They are mainly used for high-fill modifications to ensure uniform dispersion of fillers in plastics, enhancing product performance; in color masterbatch preparation, they ensure uniform distribution of pigments or dyes to avoid color differences; additionally, in reactive extrusion processes, backward pumping kneading blocks provide necessary shearing and mixing actions to promote chemical reactions. Their intense shearing and mixing effects, along with the ability to generate backpressure, make them the preferred choice for processing materials with high viscosity and high shear requirements, widely used in various high-end plastic processing applications.
