Wood pellet ring mold

The aperture range of the pellet mill die used for wood pellet material is between 5.0-18.0mm, and the length-aperture ratio, or compression ratio, is between 1:4-1:10.

The compression ratio of the ring die for the wood pellet machine is determined according to the raw material. The compression ratio of different raw materials is different, the harder raw materials ,the smaller compression ratio ; the fluffier raw materials,the bigger compression ratio .That is to say, the fluffier raw materials are more easy to press and form shape, the fluffier raw materials contain more fiber, containing more fiber material is easy to form shape.

First of all,under the premise of selecting high quality ring die, should be based on the proportion of production materials, select suitable die hole form, opening hole rate and compression ratio (compression ratio = the effective length of die hole/die hole diameter). On the premise of guarantee the ring die strength, improve the opening hole rate of ring die.For some kinds of material, under the condition of reasonable compression ratio, ring mold wall is too thin, so that the ring die strength is not enough, there will be mold explosion in the production, at this time should be in guarantee ring die hole effective length under the premise , increase the thickness of the ring die and increase the pressure relief hole.

The ring-die compression ratio is the ratio of the effective length of the ring die hole to the minimum diameter of the ring die hole, which is an index reflecting the extrusion strength of the wood pellet machine. The larger the compression ratio, the stronger the extruded wood particles.

Hanpai ring mold focuses on solving the problems of ring mold cracking and low production in the process of wood pellet production. And the use of compound hardening process can increase the service life by more than 50%.