Foire aux questions

• How do your feeders handle glass fiber—doesn't it wear out screws very quickly?

  Glass fiber is indeed highly abrasive, which is why we offer multiple wear-protection options: (1) Tungsten carbide coated screws and barrels—providing 5-10x longer service life than standard hardened steel; (2) Ceramic-lined barrels for the most aggressive applications; (3) Segmented screw design that allows replacing only the worn sections rather than the entire screw. With proper material selection, our feeders typically achieve 2-5 years of continuous service feeding 30% glass-filled compounds before needing screw replacement.

• What's the minimum feed rate you can achieve for expensive pigments in masterbatch production?

  Our micro-flow loss-in-weight feeder can reliably dose pigments at rates as low as 0.1 kg/h with ±0.5% accuracy. For ultra-low-rate applications, we use a combination of high-resolution digital load cells (1,000,000:1 resolution), vibration-isolated weighing platforms, specialized micro-screw geometries optimized for low-density pigments, and adaptive control algorithms that compensate for the very slow weight-change signal. This level of precision directly reduces pigment overuse—typically saving 3-8% on colorant costs.

• Can your batching system handle recipes with very different material ratios—like 95% PP + 5% additives across 10 ingredients?

  Yes. Our multi-feeder batching system is specifically designed for recipes with widely varying proportions. Each feeder is sized independently for its target material and feed rate—large-flow single-screw feeders for the main polymer (95%), micro-flow feeders for pigments (0.5-2%), and twin-screw feeders for fillers (5-30%). All feeders are synchronized by our central control system, which uses master-slave ratio control to maintain exact proportions even during startup, shutdown, and feed rate changes. The system supports up to 20 feeders in a single batching group.

• What about integration with our existing twin-screw extruder—does your control system communicate with extruder controls?

  Yes, full integration is standard. Our Siemens PLC-based control system communicates with extruder controls via Profibus, Profinet, Modbus TCP, or EtherNet/IP. This enables: (1) Extruder speed tracking—feed rates automatically adjust proportionally when extruder screw speed changes; (2) Cascade control—the extruder provides the master speed signal and all feeders follow in ratio; (3) Emergency stop coordination—all feeders stop simultaneously if the extruder trips; (4) Centralized HMI that displays both feeding and extrusion parameters for single-screen operator control.