Tiếng ViệtIn the feed processing industry, expander machines play a vital role in enhancing the nutritional quality and digestibility of animal feed. Among the critical mechanical components of these machines, the Inner Tube Lining (also referred to as a liner or sleeve) is indispensable.
The following are the primary technical functions of Inner Tube Lining in animal feed expander systems:
Main Housing Protection and Wear Resistance
The inner tube lining acts as a protective layer for the main housing (barrel) of the machine. During operation, the friction between the raw materials, the screw, and the barrel is immense.
Instead of allowing direct wear on the main barrel, the lining absorbs the abrasive impact. It is significantly more cost-effective and efficient to replace a worn lining than to repair or replace the entire barrel assembly.
Creating HTST Reaction Environment
The inner tube lining, in conjunction with the screws, forms a sealed compression chamber where the HTST (High Temperature – Short Time) process occurs. This configuration ensures thermal retention and maintains a stable operating pressure ranging from 40 to 120 bar.
The internal temperature within the lining bore can rapidly escalate to 90 – 140°C in just a few seconds. This facilitates instantaneous cooking of the raw materials while preserving heat-sensitive vitamins.
Optimization of Nutritional Value and Starch Gelatinization
- Starch Gelatinization: Under the influence of temperature and pressure within the lining, starches undergo thorough gelatinization. This enhances digestibility for livestock – particularly young animals – and significantly improves the Feed Conversion Ratio (FCR).
- Toxin Deactivation: For ingredients such as full-fat soybeans, the thermal energy within the lining neutralizes enzyme inhibitors (such as Trypsin Inhibitors), effectively releasing protein and energy for animal uptake.
- Pathogen Elimination: Uniform temperature distribution throughout the lining ensures the total eradication of mold, bacteria, and harmful microorganisms, fulfilling stringent international export standards.
- Enhancement of Pellet Quality: Materials exiting the expander machine exhibit superior binding properties. This results in extruded pellets with high Pellet Durability Index (PDI) and minimal fines.
Conclusion
The inner tube lining is a critical factor in determining the performance of expander machines. Selecting high-quality liners not only protects the machinery but also directly enhances profitability by improving feed quality and reducing downtime for maintenance.
Companies currently operating expander systems that require consultation on optimal liner solutions, please contact the engineering team at Tien Phat Mechanical.
