Overview
The SHJ-35 Series Twin-Screw Extruder is a robust industrial machine designed for continuous processing of polymers, food, and other viscous materials. Its twin co-rotating screws ensure efficient mixing and homogenization, making it ideal for compounding additives, producing masterbatches, or creating uniform extruded profiles. The SHJ-35 model is particularly valued for its balance of compact size and high output, suitable for mid-scale production. The extruder’s modular design allows customization of screw configurations and barrel lengths to match specific material requirements. It is commonly used in industries such as plastics manufacturing, rubber processing, and food production, where precise control over material properties is critical.
Structure and Working Principle
The SHJ-35 extruder consists of two parallel screws housed in a segmented barrel, driven by a high-torque motor and gearbox. The screws rotate in the same direction (co-rotating), which enhances shear and mixing efficiency. Each barrel segment is equipped with independent heating/cooling zones to maintain optimal processing temperatures. Material is fed into the hopper and conveyed through the screws, where it undergoes melting, mixing, and degassing before being extruded through a die. The screw elements (kneading blocks, conveying segments) can be rearranged to adjust mixing intensity. Vacuum vents are often included to remove volatile byproducts during processing.
Key Features
The SHJ-35 stands out for its high torque density, enabling it to process filled or reinforced materials without stalling. Its hardened steel screws and barrels resist wear, extending service life. Temperature control is precise (±1°C), critical for sensitive polymers. Other features include user-friendly PLC interfaces for recipe management, quick-release mechanisms for screw changes, and noise-reducing enclosures. The machine’s energy-efficient design reduces operational costs, while its compact footprint saves floor space in factories.
Application Areas
This extruder is widely used in plastic compounding to produce engineering resins, PVC blends, and biodegradable polymers. In rubber processing, it aids in devulcanization or carbon black dispersion. The food industry employs it for textured protein products or starch-based snacks. Additional applications include pharmaceutical granulation, ceramic paste extrusion, and recycling post-industrial waste. Its versatility makes it a staple in R&D labs and full-scale production lines alike.
Maintenance and Precautions
Regular maintenance includes checking screw and barrel wear, lubricating bearings, and calibrating temperature sensors. Avoid processing abrasive materials without hardened components, as this accelerates wear. Always purge the machine after use to prevent material degradation or cross-contamination. Monitor motor amperage to detect overloading early. Spare parts like screw elements and seals should be stocked to minimize downtime.
B2B Procurement Guide
When purchasing an SHJ-35 extruder, prioritize suppliers with proven after-sales support and local service teams. Request test runs with your specific materials to evaluate performance. Compare warranties and availability of spare parts. Total cost of ownership (TCO) should factor in energy consumption, maintenance needs, and potential upgrades. Used or refurbished units can offer cost savings but require thorough inspection. Lead times for new machines typically range from 8–16 weeks.
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