Side Feeding Systems are designed to introduce secondary materials into co-rotating twin-screw extruders at downstream processing sections, enabling precise addition of fillers, reinforcing fibers, recycled materials, and functional additives after the primary polymer has been plasticized. Compared with conventional top feeding, side feeding improves process flexibility, enhances feeding stability, and minimizes material degradation during compounding.
The Side Feeding Systems portfolio consists of two specialized product series: the SFT Side Feeder, developed for standard side feeding applications, and the VFT Forced Side Feeder, engineered for handling lightweight, fluffy, fibrous, and low-bulk-density materials. Together, these systems provide reliable, efficient, and flexible feeding solutions for a wide range of polymer compounding processes.
Overview
Modern polymer compounding often requires fillers, reinforcing agents, recycled materials, or functional additives to be introduced after the polymer melt has formed. Side Feeding Systems provide an efficient solution by feeding these materials directly into the extrusion process, improving material distribution while minimizing bridging, fiber breakage, and feeding fluctuations.
The product family includes two complementary series. The SFT Side Feeder is optimized for conventional powders, pellets, granules, and mineral fillers, offering stable and continuous material conveying for general compounding applications. The VFT Forced Side Feeder integrates forced twin-screw conveying with gas-solid separation technology, making it particularly suitable for lightweight powders, wood flour, glass fiber, carbon fiber, cellulose fiber, and other materials containing large amounts of entrapped air. Multiple models are available to match different extruder sizes and production capacities, providing flexible solutions for engineering plastics, masterbatch, recycled materials, biodegradable compounds, and specialty formulations.
SET Side Feeder
Technical Specifications
Product Series: SFT Side Feeder
Feeding Principle: Twin-Screw Side Feeding
Compatible Extruder Size: Ø25–Ø140 mm Modular Co-rotating Twin-Screw Extruders
Customization: Available for different extruder brands and production requirements.
Key Features
Stable and continuous side feeding performance.
Independent drive for accurate material conveying.
Optimized twin-screw design for uniform feeding.
High wear-resistant components for abrasive materials.
Modular structure for easy installation and maintenance.
Excellent compatibility with major twin-screw extruder brands.
Suitable for powders, pellets, granules, flakes, and mineral fillers.
Available in multiple sizes for laboratory and production-scale extrusion.
Applications
The SFT Side Feeder is designed for standard side feeding applications where fillers and reinforcing materials are introduced after the polymer melt has been established. It provides stable conveying performance for calcium carbonate, talc, graphite, mineral powders, recycled plastics, short glass fibers, carbon fibers, and various functional additives while maintaining consistent throughput and feeding accuracy.
The system is widely used in engineering plastics, masterbatch production, biodegradable materials, cable compounds, recycled polymers, mineral-filled compounds, and general plastic compounding processes where reliable secondary feeding is essential for achieving consistent product quality and process stability.
VFT Forced Side Feeder
Technical Specifications
Product Series: VFT Forced Side Feeder
Feeding Principle: Forced Twin-Screw Feeding with Gas-Solid Separation
Compatible Extruder Size: Ø25–Ø140 mm Modular Co-rotating Twin-Screw Extruders
Customization: Available for various material characteristics and production capacities.
Key Features
Forced conveying for difficult-flowing materials.
Integrated gas-solid separation technology.
Reduces the influence of entrapped air during feeding.
Prevents material backflow and feeding interruption.
Improves conveying efficiency for low-bulk-density materials.
Optimized for lightweight, fluffy, and fibrous materials.
Stable operation during continuous high-capacity production.
Ideal for demanding engineering plastic compounding applications.
Applications
The VFT Forced Side Feeder is specifically developed for processing materials that are difficult to feed using conventional side feeders. Its forced conveying mechanism and gas-solid separation technology effectively reduce the influence of entrapped air, improving feeding efficiency while preventing bridging, material reflux, and conveying instability.The system is particularly suitable for wood flour, cellulose fibers, glass fibers, carbon fibers, feather fibers, mineral wool, ultrafine powders, and other lightweight bulk materials. It is widely applied in long-fiber reinforced compounds, wood-plastic composites (WPC), high-filled engineering plastics, biodegradable compounds, mineral-filled polymers, and specialty compounding processes requiring stable feeding of low-density materials.
Interested in This Product?
If you’re interested in this product or have a specific application in mind, feel free to contact us. Share your material, process requirements, production capacity, and application details, and our team will recommend the most suitable configuration and technical solution to meet your production needs. Our engineering team will recommend the most suitable solution.
