1. The feed pellets are bent and there are many cracks on one side
Reason: This phenomenon occurs mostly because the feed pellets leave the ring die.
The pressure relief hole is too large.
Solution: Increase the compression ratio of the ring die. The compression force of the tower ring die and pressure roller on the material increases the density, hardness and strength of the feed pellets.
Adjust the distance and angle between the cutter and the surface of the ring die.
2.horizontal cracks appear across the entire feed pellet
Reason: When the lotus pine feed is pelleted with more fiber, because it contains fibers longer than the aperture, when the feed pellets are extruded, the feed pellets will crack on the cross section due to the expansion of the fibers.
Solution: increase the pulverization fineness, so that the longest fiber length does not exceed one-third of the particle size
3. Longitudinal cracks in feed pellets
Reason: The feed formula contains lotus pine and slightly elastic raw materials. After quenching and tempering, they will absorb water and expand. After ring die compression and granulation, they will bounce off due to the effect of moisture and the elasticity of the raw materials themselves. Longitudinal cracks.
Solution: The user can try to adjust the feed formula, or lengthen the conditioning time, or use a multi-layer conditioner or a high-efficiency conditioner.
4. the surface of the feed pellets is uneven
Reason: The user is in the process of processing feed. The pressed feed is uneven, which not only affects the appearance and quality of the feed, but if it is fed into water, it will easily cause the feed to collapse in a short time. The reason may be that the granulated powder contains large particles that have not been crushed or semi- crushed. Granular raw materials. Make the feed pellets look uneven.
Solution: Users need to pay attention to controlling the fineness of the powder when using the same material grinder to crush the raw materials. For raw materials containing more fibers, do not add too much steam to this formula.