Twin Screw Extruder Screw: High-Performance Core Component for Food & Feed Processing

Twin Screw Extruder Screw: High-Performance Core Component for Food & Feed Processing

Key Technical Advantages

1. Premium Material Selection

   
   

   Constructed from high-strength alloy steel (e.g., 38CrMoAlA) with nitriding treatment, the screw boasts a surface hardness of HRC 60-65 and excellent wear resistance. This ensures long service life even when processing abrasive materials (such as feed with high fiber content or food with mineral additives), reducing maintenance frequency and operational costs.
   
   
2. Precision Screw Profile Design

   
   

   The intermeshing twin screw structure features optimized flight geometry, including conveying sections, kneading blocks, and mixing elements. This design enables thorough homogenization of raw materials, efficient heat transfer, and precise control of extrusion temperature (ranging from 80℃ to 200℃) and pressure. For food production, it ensures uniform cooking and texture formation; for feed processing, it enhances nutrient retention and pellet durability.
   
   
3. Customization for Specific Applications
   
   

• Food Industry: Tailored screw configurations for snack foods (extruded crisps, puffed snacks), breakfast cereals, textured vegetable protein (TVP), and pet food. The design minimizes material degradation, preserves flavor compounds, and supports variable moisture content processing (10%-30%).
• Feed Industry: Optimized for aquatic feed, livestock feed, and premix feed production. The screw’s high shear rate promotes starch gelatinization (up to 95%) and protein denaturation, improving feed digestibility while accommodating ingredients like grains, oilseeds, and functional additives (probiotics, vitamins).

4. Energy-Efficient & Stable Operation
   
   
   The synchronized twin screw design reduces power consumption by 15%-20% compared to single screw extruders, thanks to efficient material conveying and reduced friction. The robust structure ensures stable operation even at high rotational speeds (200-600 rpm), enabling continuous production with output capacities ranging from 50 kg/h to 5,000 kg/h, depending on model specifications.

Application Scenarios

• Food Processing: Production of puffed snacks, cereal bars, instant noodles, soy protein meat, and nutritional supplements. The screw’s gentle mixing capability is ideal for heat-sensitive ingredients, while its high-pressure extrusion supports the creation of diverse textures (crunchy, chewy, porous).
• Feed Manufacturing: Extruded aquatic feed (floating, sinking, slow-sinking pellets), poultry feed, swine feed, and ruminant feed. It effectively eliminates pathogenic bacteria (e.g., Salmonella) through high-temperature short-time (HTST) processing, ensuring feed safety and extending shelf life.

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