▪ US Patent No. 9,308,534 (JM TECH CO., LTD.)
발명의 명칭: Jet mill combining high speed grinding apparatus and high speed grinding apparatus with jet mill mounted thereon
1. A high speed grinding apparatus comprising: a rotary shaft rotated by a rotor; a support rod having a curved recess open upwardly; a grinding unit having a rotary blade part having the center formed in a shape of a cylinder coupled to the rotary shaft and a plurality of rotary blades formed on the outer peripheral surface thereof, the rotary blade part being increased in diameter as it goes from one side thereof toward the other side thereof, and a fixed blade part mounted on the curved recess of the support rod in such a manner as to be located on the concentric circle of the first rotary shaft and having a plurality of fixed blades formed on the inner peripheral surface thereof in such a manner as to be spaced apart from each other with a given distance separated from the turning radius of the rotary blades; an introduction part mounted on one side of the rotary blade part and having an introduction hole formed to introduce an object thereinto; a discharge part mounted on the other side of the grinding unit and having a discharge hole formed to discharge the grinded object therefrom and an opening formed on one surface toward the grinding unit; a jet mill mounted adjacent to the grinding unit in such a manner as to pass the rotary shaft through the center thereof and adapted to inject pressurizing air into the grinded object if the grinded object is introduced from the grinding unit, thereby performing grinding through the particle collision of the grinded object; and an impeller mounted on the opening of the discharge part and having a disc rotatably fitted to the outer peripheral surface of the rotary shaft and a plurality of blades mounted vertically on the disc, wherein the grinded object is introduced into the space between the rotary blade part and the fixed blade part, collides against each other through the rotation of the rotary blades, and is introduced into the jet mill, and next, the particles of the grinded object collide against each other through the swirling movements of the pressurizing air injected from the jet mill and grinded to fine particle sizes, and wherein the impeller is rotated through the rotation of the rotary shaft to increase the discharge pressure of air and at the same time collides the grinded object introduced from the jet mill against the blades to discharge the grinded object to the discharge part.
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