1. When the modulator speed is too high, the material spends less time in the modulator, leading to insufficient conditioning. This can result in a bulk density that exceeds the desired standard. On the other hand, if the modulator speed is too slow, the material remains in the system for too long, causing excessive expansion. This may lead to puffed corn turning white and losing its nutritional value. tFj China Feed Industry Information Network - based on feed, serving animal husbandry

2. High steam pressure and temperature can cause the corn flour to expand too much, resulting in a pale color and reduced nutritional content. Conversely, low steam pressure and temperature may not provide enough energy for proper expansion, leading to higher levels of raw meal and moisture. This is often related to the mechanics of the puffing process. tFj China Feed Industry Information Network - based on feed, serving animal husbandry

3. The size of the screw pitch and die hole significantly affects the expansion process. If they are too large, the internal pressure may be insufficient, leading to under-expansion and increased moisture content. If they are too small, excessive pressure can cause over-expansion, which also results in a loss of nutritional value and a white appearance in the final product. tFj China Feed Industry Information Network - based on feed, serving animal husbandry

4. The method of discharge—whether cold or hot—also plays a key role in moisture control. Cold discharge, involving a large fan and extended cooling time, helps reduce moisture content effectively. In contrast, hot discharge with limited airflow and short cooling time can lead to excessive moisture retention in the puffed corn. tFj China Feed Industry Information Network - based on feed, serving animal husbandry

In conclusion, optimizing these parameters is essential for achieving consistent quality in extruded feed products. By carefully adjusting extruder speed, steam conditions, and die design, manufacturers can control the final characteristics of the product, ensuring it meets both quality and nutritional standards. Proper discharge methods further contribute to maintaining the right moisture level, which is vital for storage and shelf life. Understanding these factors allows for better process control and improved overall performance in the feed industry. tFj China Feed Industry Information Network - based on feed, serving animal husbandry

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