Plastic granulator | Kunshan plastic granulator

Each working section of the screw
The processing of the screw generally includes the feeding section (preheating and solid conveying, melting and mixing section, side feeding section (in some cases, the first exhaust section, dispersion/homogenization section, devolatilization section, discharge Pressurization section.
Feeding section
The feeding of the twin-screw is a hungry feeding design. The output has little relationship with the speed of the screw. Therefore, we can adjust the filling degree and performance of the material residence time of the twin-screw. The consumption is strictly controlled. However, the most ideal operating condition is when the feeding reaches the maximum. At this time, the production capacity of the extruder is fully utilized. The main function of the feeding section in the screw combination is to eat materials and transport solids. At the same time, the feeding section compacts the solid bed. The functional conveying function of the feeding section is achieved by friction and dragging.
Melting section
The main job of this section is to transport the upstream feeding section. The melt/resin mixture is fully melted and preliminary mixing work is performed. The completion of these two functions mainly relies on the meshing block. Due to the need to complete the preliminary melting (this is the main purpose of this paragraph), most of the meshing blocks here have large angles. Thickness of the engagement block, such as angle engagement block and angle engagement block. The resin is completely melted by the heat energy converted by the heating plate and mechanical energy.
Side feeding
The main job of this section is to exclude the melt Small molecule volatiles that may be contained in the twin-screw and other additives are added. Usually, large-lead thread elements are used in this section to reduce the channel filling degree of the melt here and are in direct contact with the external working environment of the twin-screw, which is conducive to volatilization. The exclusion of components also provides space for the remaining components to be added. The components usually added here include liquid flame retardants, powdered fillers, and various fibers. The adding methods also include melt pump pumping. Feeding screw feeding method and long fiber winding adding method.
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