What Is The Arrangement Of Die Holes Of Pellet Machine?

            Pellet machine is a porous ring piece with poor working conditions. Long-term bearing pressure roller cycle extrusion and material friction, resulting in cyclic bending stress and contact compressive stress. Its main form of damage is fatigue damage. The structural parameters that affect the fatigue failure of the ring die mainly include the aperture diameter, aspect ratio, die hole arrangement and the number of holes.

            The arrangement of the ring die hole structure has an important influence on the overall strength of the ring die, material extrusion pressure, particle molding quality and pelleting energy consumption. The arrangement of die holes in the pellet mill is an important factor in the design of the ring die. The size of the pellets also varies according to different pelletizing objects. Once the granulation object is determined, the size of the pellet is basically determined, and the size of the die holes can also be determined. There are two ways of arranging the holes of the ring die of the pellet machine: one is a more neatly arranged array, and the other is a staggered arrangement. From the practical use, in order to make the material better access to the die holes, the arrangement of the die holes is generally staggered, usually arranged in an equilateral triangle or isosceles triangle.

           Measurement of the service life of the ring die of the pellet machine should not only consider the fatigue life of the ring die, but also the output of the ring die. The number of holes in the ring die of the pellet machine has a great influence on the ring die yield. Under the condition of the same service life, the more the number of die holes, the higher the ring die yield. Ring die life. Under the condition of ring die aperture 10mm, L/D ratio 5:1, temperature 120℃: the fatigue life of ring die with the same arrangement of die holes decreases with the increase of the number of die holes.