What are the advantages of using a parallel twin screw barrel in plastic extrusion?

2023.07.17
Using a parallel twin screw barrel in plastic extrusion offers several advantages, including:

1.Enhanced mixing and compounding: The parallel twin screw barrel design provides excellent mixing and compounding capabilities. The two screws rotate in parallel, creating a kneading and shearing action that helps distribute additives, fillers, and other materials evenly throughout the plastic melt. This leads to improved material homogeneity and dispersion.
2.Increased throughput: Parallel twin screw barrels typically have a higher throughput capacity compared to single screw barrels. The dual-screw design allows for higher material processing rates, enabling faster extrusion and production speeds.
3.Improved melt quality and stability: The parallel twin screw barrel configuration provides better control over the melt temperature and viscosity. The screws generate efficient heat transfer and efficient melt cooling, resulting in a more consistent melt with reduced thermal degradation.
4.Versatility with different materials: Parallel twin screw barrels can process a wide range of materials, including both rigid and flexible plastics, blends, and various additives. The modular design allows for easy customization and adaptability to different material requirements.
5.Enhanced process flexibility: The individual screw rotation and speed control in a parallel twin screw barrel enable precise control over the melt flow, pressure, and residence time. This flexibility allows for better optimization of the extrusion process and adjustments to meet specific product requirements.
6.Reduced energy consumption: Parallel twin screw barrels often exhibit improved energy efficiency compared to other extrusion systems. The efficient mixing and compounding action of the screws, along with optimized thermal management, can help reduce energy consumption during the extrusion process.
7.Superior surface finish and product quality: The parallel twin screw barrel design helps minimize melt irregularities, such as melt fracture and degradation, resulting in a smoother surface finish and improved product quality. This is particularly beneficial for applications that require high-quality extruded products.
8.Easy maintenance and cleaning: Parallel twin screw barrels are generally designed for easy access, disassembly, and cleaning. This facilitates maintenance tasks, including screw and barrel inspections, replacement, and removal of accumulated residue.

It's important to note that the specific advantages of using a parallel twin screw barrel can vary depending on factors such as the application, material being processed, and the design and quality of the barrel itself.

Parallel twin screw barrel for pvc pipe
Parallel twin screw barrel for pvc pipe
Twin screw and barrel type: CINCINNATI, BATTENFELD, KRAUSSMAFFEI, BAUSANO, MAPLAN and AMUT model spares.
The screw of the series consists mainly of two parallel cylindrical screws, which rotate to the opposite direction. Parallel double screw rotational speed is low, less heat, shear stability of the materials in the barrel, uniform, screw of material conveying ability is strong, have good exhaust effect at the same time, is conducive to the stability of product quality.
The main applications: Includes PVC pipe & profile extrude, PP/PE sheet product.