1.Advanced, automatic ring die processing technology: Full automatic CNC ring die drilling machine and vacuum heat treatment technology ensure the quality and working life of ring dies.
2.Rich ring die processing experience ensures the depth and opening ratio of the hole of ring die which can satisfy different requirements of poultry, livestock and aqua feed, thus improves the pelleting efficiency.
3.The surface of ring die is of good smoothness, high hardness, and the pellets are of good shape and neat appearance.
4.Quick discharge, high output and the production efficiency of the same size are much higher than ring dies of other brands.
Special aqua feed ring dies (small hole diameter but large compression ratio) have the advantages like quick discharge, neat shape, good smoothness, good water tolerance etc.
Vacuum heat treatment
1.Suitable hardening temperature of vacuum furnace ensures higher hardness and impact toughness.
2.Suitable drawing temperature ensures no cracks of ring dies and little wear of hole and surface, which improves the working life.
3.In same loading, adding backfill air pressure will boost die's cooling and hardness.
4.CNC control technology ensures the stability of ring dies.
Different ring die material affects the performance and working life of ring dies. Normally, the ring die materials are 40Cr and 4Crl3.
40Cr VS 4Crl3:
The hardness and impact toughness of 40Cr is better than 4Crl3, but the hardness decreases from surface to core part and its corrosion resistance is worse.
However in practical application, under the same operating condition, the working life of ring die with Cr content 12% is shorter by 1/3 than ring die with Cr content 14%. So the Cr content shall be above 12.5%.
Measurement of ring die dimension
1.Inspect the dimension of forging stock according to the order contract, measure with vernier caliper, and the deviation shall be less than ±1mm.
2.Based on the inner circle, rotating table and dial indicator shall be applied to inspect outer circle of forging stock and face runout, with deviation less than 1.0mm.
Ring die Customization:
We (FDSP) can manufacture the ring dies of different materials, types and hole diameters which are suitable for all top brand pelletizers, such as FDSP, ANDRITZ, CPM, BUEHLER, ZHENGCHANG, MUYANG, SHENDE etc.
Please offer the drawing and specifications of ring dies if you need.
Ring die types
Type and size
Buhler ring die304.58
Buhler ring die304.78
Remark: The types above are only for reference, and we can also manufacture other ring dies that are not listed.