Application:
Ring die for pellet machine in poultry feed,livestock feed,aqua feed, bio-mass pellet machine,etc.
We could offer you OEM high chrome steel ring die,Such as for CPM, Buhler, Andiritz, Muyang, Zhengchang pellet mill with different specification.   

Features of ring die:
1Made of imported highcarbon highchromium stainless billet steel,optimization carbon,thus enhancing wearing and corrosion resistance and hardness.
2 It can deal with all kinds of die hole over &1.2mm (&1.2mm included) and compression ratio.
3Ring die can be produced up to 300mm-1500mm in diameter  and 500mm in height.
4In ring die processing, full automatic control, one-time molding for die hole, high smoothness.
 strong tensile strength,good wear resistance, good corrosion resistance,high wear resistance,long life
 

Advantage of our ring die:
1.Material refining technology,fewer impurities,high purity,largely reducing harmful elements content(such as 
elements S,P ), thus comprehensive mechanical performance of material is raised.
2.Through roll forging, material is processed and strengthened and material fibre is complete and uniform, 
which increases integrated mechanical performance of material.
3.FDSP Company has the world advanced forging equipment and technology,electronic data processing 
systems and perfect quality control system.
4.Ring die blank,generally chromiumalloy roll forgings, some factories use 45 ordinary carbon steel.
5.Hardness of blank must be controlled, ranging from HB170 to HB220.If the hardness is too high,the drill is 
easy to break and happens with die hole when drilling. If hardness is too low, the surface finish of die hole 
will be not good.
6.In order to control blank inner material uniformity, every blank must be carried out with fault detection, 
which can avoid defects such as flaw, pore-free,crackle and inclusions etc.
7.After machining and heat treatment process, hardness of ring die can be up to HRC 52-58(inner diameter less than 350mm),HRC50-56(inner diameter more than 350mm),more wearable and 
anti-corrosion.
8.In order to control hardness uniformity of ring die after heat treatment, we choose more than three points 
in each part of trisection of peripheral direction to test hardness and take average.The difference of 
hardness value between each part should not be higher than HRC4.
9.According to the principle of metal material science combined with gas quenching and C,Cr,Mn,Ni,V 
elements content is optimized, forming the standard of ring die.

Relation between die hole structure and pelleting:
Straight hole and release stepped hole is suitable for compound feed processing
External conical hole suitable for the processing of high-fibre feed like de-fat chaff
Internal conical hole and compression-type stepped hole applicable for the process of herbage powder feed of light proportion
We should try to avoid using release stepped hole(pressure-relief vent)
Because discharing is not easy for holes in the rows of the edge of ring die, pressure-relief vent is designed there.

Finished Ring Dies in Workshop 



 About Us
FDSP is total solution provider mainly for feed industry and integrated with feed machinery, storage machinery, fertilizer machinery renewable en ergy machinery and its engineering. Taking "To create value for customers" as our motto, we are dedicated to provide elaborately-designed, economic & attractive, durable solution for our overseas customers.
We have passed Certificate for ISO9001, CE, SGS and our customers are enjoying with us in SEA, Middle East, Africa, Oceania, South America, etc. We have accumulated abundant experience for comprehensive development, utilization of agriculture.
We will become leader definitely for industry and strive to boost well-beings of society, be trustworthy, stable partner for long-term and create value for customers.