An improved grinding mill that utilizes mill stones that minimizing the mechanical processes required to regulating the mill stones and allow an user to gain quick and easy access to the mill stones by removing a hopper. In addition, to provide a base frame for the mill that secures both mechanical and electrical parts including the mill housing to reduce manufacture and repair time.

A grindstone corresponding to a rotatable grindstone or a stationary grindstone can be incorporated in a grinding device and is used for grinding raw materials. The grindstone includes a main body part and an outer circumferential ring part that can be detached from each other. The main body part has a coarse grinding part in which coarse grinding grooves corresponding to first coarse grinding grooves and second coarse grinding grooves for initially grinding the raw materials are formed. The outer circumferential ring part has a fine grinding part corresponding to a wall part in which fine grinding grooves for further grinding the raw materials ground by the coarse grinding part are formed. When the main body part and the outer circumferential ring part are assembled, the fine grinding part corresponding to the wall part is located at an outer circumference of the coarse grinding part.

A mill includes a first mill having a first grinding region, a second mill having a second grinding region opposed to the first grinding region and provided to be rotatable relatively to the first mill, and a heat radiation mechanism which is provided in at least one of the first mill and the second mill and radiates friction heat generated as a result of rotation of the first mill and the second mill relative to each other, and the heat radiation mechanism is provided in a portion except for the first grinding region and the second grinding region.

A mill includes a first mill having a first grinding region, a second mill having a second grinding region opposed to the first grinding region and provided to be rotatable relatively to the first mill, and a heat radiation mechanism which is provided in at least one of the first mill and the second mill and radiates friction heat generated as a result of rotation of the first mill and the second mill relative to each other, and the heat radiation mechanism is provided in a portion except for the first grinding region and the second grinding region.

A reducing machine having an air cooled cutting discs is disclosed. The air cooled discs have cutting surfaces on both sides. The cutting surfaces have edges which are sharpened for cutting input material when the cutting surface is facing the cutting surface of the opposed disc. When the cutting surface of the stationary disc is facing the housing, the cutting surface acts as a heat sink to air cool the stationary disc and the mill assembly in general. Air inlets in the housing lid permit air to flow over the cooling surface. A damper restricts air flow over the air cooling surface to control the temperature of the reducing machine, such as during start up.

A reducing machine having an air cooled cutting discs is disclosed. The air cooled discs have cutting surfaces on both sides. The cutting surfaces have edges which are sharpened for cutting input material when the cutting surface is facing the cutting surface of the opposed disc. When the cutting surface of the stationary disc is facing the housing, the cutting surface acts as a heat sink to air cool the stationary disc and the mill assembly in general. Air inlets in the housing lid permit air to flow over the cooling surface. A damper restricts air flow over the air cooling surface to control the temperature of the reducing machine, such as during start up.

A mill that includes a first milling stone connected rotatably by an electric motor, a second milling stone arranged coaxially with the first milling stone, and a milling area formed by facing milling surfaces of the first milling stone and the second milling stone, wherein the milling area has a first portion formed by first facing portions of the facing milling surfaces of the first milling stone and the second milling stone and a second portion formed by second facing portions of the facing milling surfaces of the first milling stone and the second milling stone.

A mill that includes a first milling stone connected rotatably by an electric motor, a second milling stone arranged coaxially with the first milling stone, and a milling area formed by facing milling surfaces of the first milling stone and the second milling stone, wherein the milling area has a first portion formed by first facing portions of the facing milling surfaces of the first milling stone and the second milling stone and a second portion formed by second facing portions of the facing milling surfaces of the first milling stone and the second milling stone.

A grinding apparatus of the present disclosure includes a body member including an inlet through which raw material is introduced; a fixing member installed inside the body member; a rotation member installed inside the body member and positioned spaced apart from the fixing member; and a driving member installed outside of the body member and configured to rotate the rotation member, wherein the rotation member includes a disk coupled to the driving member; a first pattern inserted to a certain depth on the disk and including a plurality of first lines positioned parallel to each other; a second pattern inserted at a certain depth on the disk and including a plurality of second lines arranged to intersect the plurality of first lines and positioned parallel to each other; and a grinding portion positioned between the first lines and the second lines, and protrudes to the outside to grind raw material.

A grinding apparatus of the present disclosure includes a body member including an inlet through which raw material is introduced; a fixing member installed inside the body member; a rotation member installed inside the body member and positioned spaced apart from the fixing member; and a driving member installed outside of the body member and configured to rotate the rotation member, wherein the rotation member includes a disk coupled to the driving member; a first pattern inserted to a certain depth on the disk and including a plurality of first lines positioned parallel to each other; a second pattern inserted at a certain depth on the disk and including a plurality of second lines arranged to intersect the plurality of first lines and positioned parallel to each other; and a grinding portion positioned between the first lines and the second lines, and protrudes to the outside to grind raw material.