A tooth (2) for use in a grinding wheel (4), the tooth (2) including a spigot (8) for cooperating with a corresponding structure within a slot (10) of the grinding wheel (4) and a bolt (14) for locking the tooth (2) in the slot (10) of the wheel (4), and a grinding wheel (4) comprising the tooth (2).

A tooth (2) for use in a grinding wheel (4), the tooth (2) including a spigot (8) for cooperating with a corresponding structure within a slot (10) of the grinding wheel (4) and a bolt (14) for locking the tooth (2) in the slot (10) of the wheel (4), and a grinding wheel (4) comprising the tooth (2).

A shredder includes a shredder box and a shredder rotor positioned within an interior of the shredder box. The shredder rotor is rotatable about a rotor axis and has a plurality of rotor teeth. An access door is pivotally moveable between an open position and a closed position, the access door defining a side wall of the shredder box when in the closed position. A shredder comb is positioned at an interior side of the access door and includes a plurality of shredder comb teeth. When the access door is in the closed position, the shredder comb is positioned at a shredding location to intermesh with the plurality of rotor teeth for shredding material input to the shredder box. The plurality of shredder comb teeth are removable and reversible for use in two orientations.

A shredder includes a shredder box and a shredder rotor positioned within an interior of the shredder box. The shredder rotor is rotatable about a rotor axis and has a plurality of rotor teeth. An access door is pivotally moveable between an open position and a closed position, the access door defining a side wall of the shredder box when in the closed position. A shredder comb is positioned at an interior side of the access door and includes a plurality of shredder comb teeth. When the access door is in the closed position, the shredder comb is positioned at a shredding location to intermesh with the plurality of rotor teeth for shredding material input to the shredder box. The plurality of shredder comb teeth are removable and reversible for use in two orientations.

The invention relates to a tool for securing on a tool holder of a machine tool for machining vegetable and/or mineral materials, comprising a tool body which is equipped with a machining attachment that points in a tool feeding direction and comprises a cutting region, in particular a cutting element, and on which a fitting element for meshing with a mating element provided on the tool holder is formed on a support surface facing the tool holder. The dependability and operational reliability when using a machine tool can be ensured if the fitting element has at least two molded regions with different contour regions over the vertical course of the fitting element with respect to the support surface.

The invention relates to a tool for securing on a tool holder of a machine tool for machining vegetable and/or mineral materials, comprising a tool body which is equipped with a machining attachment that points in a tool feeding direction and comprises a cutting region, in particular a cutting element, and on which a fitting element for meshing with a mating element provided on the tool holder is formed on a support surface facing the tool holder. The dependability and operational reliability when using a machine tool can be ensured if the fitting element has at least two molded regions with different contour regions over the vertical course of the fitting element with respect to the support surface.

A machine for shredding/cutting (200), in particular for biomass and the like, comprising a frame (201) in which a tool holder rotor (100) is rotatably mounted on and which a number of tools (103) are arranged. The tools (103) are arranged in conduits (105) which are formed by side walls (104) and are arranged in a conduit (105) in which at least one inclined deflection element (102) is arranged in front of a tool, and wherein deflection elements (202) are arranged opposite the conduits (105) on the frame (201).

A machine for shredding/cutting (200), in particular for biomass and the like, comprising a frame (201) in which a tool holder rotor (100) is rotatably mounted on and which a number of tools (103) are arranged. The tools (103) are arranged in conduits (105) which are formed by side walls (104) and are arranged in a conduit (105) in which at least one inclined deflection element (102) is arranged in front of a tool, and wherein deflection elements (202) are arranged opposite the conduits (105) on the frame (201).

The system for preparing silica aerogel according to the present invention comprises a raw material supply part transferring at least one raw material of de-ionized water, water glass, a surface modifier, an inorganic acid, and an organic solvent to a mixing part, the mixing part mixing the raw materials transferred from the raw material supply part to produce silica wet gel, a drying part drying the silica wet gel to produce the silica aerogel, a recovery part recovering a portion of the vaporized raw material of the raw materials used in at least one of the mixing part and the drying part, and a heat transfer part transferring heat to at least one of the mixing part and the drying part, wherein the system further comprises a pulverizing part that pulverizes the raw material from the row material supply part to the mixing part.

The system for preparing silica aerogel according to the present invention comprises a raw material supply part transferring at least one raw material of de-ionized water, water glass, a surface modifier, an inorganic acid, and an organic solvent to a mixing part, the mixing part mixing the raw materials transferred from the raw material supply part to produce silica wet gel, a drying part drying the silica wet gel to produce the silica aerogel, a recovery part recovering a portion of the vaporized raw material of the raw materials used in at least one of the mixing part and the drying part, and a heat transfer part transferring heat to at least one of the mixing part and the drying part, wherein the system further comprises a pulverizing part that pulverizes the raw material from the row material supply part to the mixing part.