Extrusion pellets are small cylindrical pieces of material used in various industrial processes. They typically range in size from 0.3 to 1.5 mm. However, the exact size can vary depending on the specific application and the equipment being used.
What Size Are Extrusion Pellets? (5 Key Factors to Consider)
1. Standard Size Range
Pellets used in extrusion usually fall within the range of 0.3 to 1.5 mm. This size is common in many industrial applications, especially those involving compaction and drug layering techniques. Smaller pellets help achieve better dispersion and uniformity in the final product.
2. Adjustment for Specific Needs
The size of the pellets can be adjusted based on the specific requirements of the application. For example, if transparency or thickness is needed, the pellet size might be altered. The text mentions aiming for a pellet around 2mm thick and transparent, which might require adjusting the amount of powder used. This shows that while there is a standard range, customization is possible to meet specific product specifications.
3. Preparation Techniques
The size of pellets can be influenced by the preparation techniques used. For instance, pressed pellets are prepared using dies and a press machine. The choice of die type (flat disc or cylinder) and size (ranging from 10 to 43 mm inner diameter for rings and cups) can affect the final pellet size. The ease of pelletization can also be influenced by the characteristics of the powder sample and the use of a forming agent (binder) if pelletization is difficult.
4. Raw Material Size Requirements
When preparing pellets, the size of the raw material after crushing is crucial. The general raw material size after crushing should be less than 5mm. The specific size is determined by the expected particle diameter and the size of the die hole of the pellet machine. This highlights the importance of controlling the initial particle size of the raw material to achieve the desired pellet size.
5. Particle Size Reduction
To enhance the quality of the pellets, it is recommended to reduce the particle size as much as possible using crushers, grinders, and millers before pressing the pellet. A commonly accepted particle diameter is 40 µm or lower, which ensures better compaction and uniformity in the final pellet product.
Continue Exploring, Consult Our Experts
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