Segmentation of combinations of threaded elements and their functions

1) The combination of threaded elements is generally divided into 5 sections: conveying section, melting section, mixing section, exhaust section and homogenization section.

1. Conveying section, conveying materials to prevent overflow. Threaded element thread sleeve

2, melting section, this section through heat transfer and friction shear, so that the material fully melted and homogenized.

3, mixing section, so that the material component size further refined and uniform, forming an ideal structure, with distribution and dispersion mixing function. Thread block kneading block

4. Exhaust section, discharge water vapor, low molecular weight substances and other impurities.

5. Homogenization (metering) section, conveying and pressurizing, establishing a certain pressure, so that the material at the die has a certain density, and at the same time further mixing, and finally achieve the purpose of smooth extrusion granulation.

(2) The period of distribution (distribution) and dispersion mixing.

1. The threaded elements are distributed and mixed to divide and recombine the melt and make the spatial distribution of each component uniform, which is mainly realized by displacement flow under the action of stress such as separation, stretching (alternating compression and expansion), distortion, reorientation of fluid activities, etc.

2. Dispersion and mixing, breaking the components into particles or making the size of the incompatible two-component dispersed phase reach the required range, mainly by the shearing pressure and stretching stress of the kneading block.