2022-12-29
Shear element mainly refers to the kneading block, the role is to provide a high shear force, with the ability to distribute and disperse the mixture. The main parameters are the number of heads, thickness and staggered angle. Always use in pairs or bunches, there is a staggered angle between adjacent kneading blocks, that is, the misalignment angle, the material in the Extruder Barrel of the extruder can be mixed and exchanged, multiple adjacent kneading blocks combined together to form the angle of the spiral, with the rotation of the screw, to promote the mixing and exchange of materials along the direction of the axis of the Extruder Screw Elements.
The angles are 30°, 45°, 60° and 90°, which have different functions and effects. When the screw element is positive, the larger the misalignment angle is, the lower the conveying capacity is, which increases the residence time of the material in the barrel and enhances the mixing quality, but there is a problem of material leakage between the screw elements. The mixing quality consists of distribution mixing and dispersion mixing. The distribution mixing is enhanced by increasing the angle, but the dispersion mixing shows different trend characteristics, the best at 45°, followed by 30° and the wo