Planetary Screw Barrel for Heat-Sensitive PVC Calendering

The planetary screw barrel is mainly used for heat sensitive materials, such as processing rigid PVC. In the calender production line of PVC transparent chip, adopt planetary screw barrel to plastify and mixing raw materials for calender. It can make all melting materials, accessory ingredient and modifier uniformly mixing and dispersing. It has features of good plasticization self-cleaning, high productivity, long using life. Its unique design features a central main screw surrounded by multiple planetary screws. This creates a large contact surface for efficient heat transfer and uniform melting at low temperatures.

The planetary screw barrel is specifically designed for processing heat-sensitive polymers, with its primary application in PVC calendering lines producing transparent films and sheets. In PVC transparent chip calendering, the planetary screw configuration provides intensive shearing action that thoroughly plasticates the compound while maintaining low melt temperatures to prevent thermal degradation and discoloration. The powder coating industry uses planetary screw barrels in extruders that produce powder coating resins with uniform particle size distribution and consistent melting behavior. Engineering plastics compounding, particularly for PVC-based compounds with multiple additives, benefits from the planetary screw's superior homogenization capability that ensures uniform distribution of stabilizers, plasticizers, and pigments. For rigid PVC profile extrusion, the planetary screw can be employed in combination with conventional feed screws to achieve the precise plasticating required for complex profile geometries.