Double-flighted screw elements, also known as double screws, are extensively utilized in modern co-rotating twin-screw compounding extruders, constituting about 70% to 100% of the elements, excluding various kneading blocks and mixing elements. These elements have an olive-shaped cross-section. The large-lead screw elements are typically used in the feeding and exhaust sections (both natural and vacuum exhaust) of the extruder, where the material is generally not fully filled. The small-lead screw elements are primarily employed to pressurize or space kneading blocks, increasing the residence time to accelerate the melting of modified materials. This results in obtaining modified finished particles with enhanced physical and mechanical properties through more efficient screw configurations.

These screw elements enhance the overall efficiency and performance of twin-screw extruders, making them crucial for various industrial applications, particularly in the processing of plastics and polymers. Their design ensures optimal material handling, self-cleaning capabilities, and the production of high-quality end products.

Nanxiang Machinery is a specialized manufacturer of precision-processed threaded elements, kneading blocks, mandrels, ultra-hard screw accessories, and wear-resistant alloy steel sleeves for parallel twin-screw extruder components. The company's products are widely used in internationally renowned brands such as Coperion, Leistritz, Berstorff, KOBE, and JSW. Their applications span across the plastic industry, food industry, feed industry, pellet manufacturing industry, and pharmaceutical industry. Nanxiang has established long-term and stable cooperative relationships with large equipment manufacturers and plastic manufacturers in Shanghai, Jiangsu, Zhejiang, Guangdong, Shandong, Shaanxi, Anhui, Chongqing, and Sichuan, and has long-term partnerships with customers in India, Thailand, Malaysia, Israel, Australia, and other countries.#twin screw extruder parts #extrusion #compounding