Description of Product: 1.Unique roll gap adjustment mechanism enabling both synchronic adjustment of both ends and single end adjustment during operation and eliminating roll-roll contact ; 2.Incorporating rail type bearing box support to facilitate dismantling and positioning of rolls and all other assemblies; 3.Complete with wear resistant Teflon plate apron on both sides of the working chamber to ensure proper sealing of material and dust and hygienic working environment; 4.Adopting single motor main driving mechanism with enlarged belt angle and spring-type driven-end belt tensioning device to enhance driving efficiency ; 5. Complete with magnetic device at the feeding point that moves along with the feeding door so that the magnet surface is always parallel with the material flow.