Selecting of ring die pellet mill

Ring die is the central parts of sawdust pellet mill, and it is the quickest wearing part. According to estimation, the consumption ring die account for about 25% of the fee for repair in the whole workhouse. At the same time, it has direct relationship with the pellet quality. Therefore, it is important for the producer to understand the features of ring die and how to choose the ring die correctly. The ring die pellet mill are usually made of carbon steel or alloy steel or the stainless steel after the treatment of forging, machining, drilling the die hole and heat treatment etc. At present, the popular pellet mill on the domestic market has different in quality, the reason is that the difference of selecting material, processing selection and controlling etc.

 
 
From the features of ring die, we can see that selecting the ring die requires a lot of elements to consider. During the practical work, some of the elements have been designed early, like the installment of ring die, liner speed of ring die and the work area of ring die. This has been decided at the time of purchasing without changing. Another element are ensured by choosing the ring die form professional manufacture like the material of ring die, strength of heat treatment, open porosity of ring die and the harshness. As for these elements, the professional manufacture of ring die performs well, what the users should do is not to purchase the ring die from manufactures without any technology and equipment protection for the sake of low price. For example, processing of die hole and heat treatment depend on the professional gun drilling and vacuum heat treatment equipment with high quality. The common type of drilling machine and heat treatment method can not process ring die with higher quality.
 
Currently, the pellet plants are commonly faced with the issues of how to select the proper mode of die hole and the compression ratio according to their own type of pellet and the formula. In general, the straight hole and release the trapezoidal hole are fit for producing combined feedstock: the outer conical holes are fit for produce the high fiber content material like skim Kang; hohlkegel hole and compression type trapezoidal hole are fit for processing the feedstock with light proportion of light like the grass powder. As for the above reason of designing the released step hole, it is because of the feedstock of some spicy, especially for the feed material with small diameter, the measures of increasing the thickness are carried out to deal with the usually burst of ring die during the production that the ring die thickness is not up to the standard with low strength on the basis of ensuring the compression ratio. The method is to increase the thickness of ring die and increase pressure-relief hole (releasing hole) on the basis of ensuring the valid length of die hole. 



In general, the compression ratio of high grain content combined feed; the compression ratio of heat sensitive feed and urea fodder should be about 5-8; compression ratio of natural protein content concentrated feed is about 5-11 properly; compression ratio of milk combined feed is about 7-15 properly. In addition, the producer can adjust the compression ratio according to user’s requirement to feed quality after considering the basic feed for formula, like the lower compression ration increases the production, decrease the energy consumption and reduce the wearing of ring die, but it can reduce the feed quality, like the not strong of pellet, uniform in size and high powdery ratio. On the contrary, it is advantageous to the pellet quality (the pellet has smooth surface and light with lower powdery ratio), but it can increase the production cost. 

The quality of ring die plays an important role in making high quality pellets and high output. Furthermore good ring die can produce good ring die pellet machines for pellet machine manufacturers and on the other hand good ring die can save much maintenance cost for pellet manufacturers. Thus choose a reliable ring die manufacturer who can supply you top quality ring dies is crucial. Kingman boasts the best pellet mill manufacturer and supplier of China. Primary productions of KMEC: series of flat die pellet mill, ring die pellet mill production line etc. Our products have been exported to many foreign countries. If you have question to our products, please feel free to contact us.

----------------------------------------------------------------------------------------------------------------------------------------------------