SU1680321A1 - Mill - Google Patents

Description

The invention relates to a grinding technique and can be used in construction, in the industry of building materials, in the chemical, metallurgical, mining and other industries. The aim of the invention is the intensification of the workflow. The mill contains a processing chamber 2 mounted on frame 1 and having hatches for loading 3 and unloading 4, and a working body in the form of a toroidal-helical spiral 9 mounted inside the body on the drive shaft 5 and the axis of rotation 6. The spiral of the working body is made of a ribbon rolled, the cross-sectional profile of which is flat on one side and stepped from the opposite working surface, with the protrusions and valleys alternately alternating in the radial direction relative to the center line of the helix and located ozheny at equidistant helical lines. In addition, the stepped portion of the working surface can be made wavy with rectangular, triangular or trapezoidal protrusions. 2 hp ff, 7 ill.

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The invention relates to grinding technology will help to be used in construction, in the industry of building materials, in chemical, metallurgical, mining, paintwork and other branches of engineering and technology.

The aim of the invention is the intensification of the workflow.

Fig, 1 shows the mill, a general view; in fig. 2 - an example of mounting the working body; in fig. 3-6 - profiles of the cross section with wavy, rectangular, triangular and trapezoidal protrusions, respectively: in FIG. 7 - part of the working surface of the coil.

The mill contains a grinding chamber 2 mounted on the frame 1 with hatches for loading and unloading 3, 4, inside of which on the drive shaft 5 and the axis 6 through the attachment units 7, 8 the working member is fixed in the form of a toroid-helix spiral 9, which is rotated from the electric motor 10 in the main support 11 and an additional 12. The working surface of the coil has lugs 13 and cavities 14.

Making a helix from a rolled steel, whose cross sectional profile is flat on one side and stepped on the other working surface, allows to increase the surface of the working body in contact with the material, while at the same time, the protrusions on the working surface increase the specific pressure on the material local zones, creating conditions for the destruction of the most durable, and last but not least, lamellar materials. The stepped portion of the working surface with wavy protrusions makes it possible to simultaneously grind small pieces of material with the process of ovalization of the grains of the original product. The grains fall into the zone between the flat side of the helix and the trough of the stepped surface. This phenomenon applies not only to the wavy surface. Multifaceted, i.e. triangular, rectangular and trapezoidal, the shape of the protrusions allows for chipping the sharp edges of the material grains at different angles and different grain orientation along the length of the rolling process.

The execution of working bodies from spirals with various protrusions allows, in addition to pure grinding, to organize technological processes not only for ovalization of abrasive grain, but also to produce a process of mechanical activation with different intensity! material as well

process of mechanical alloying of metals.

The working body with a triangular shape of protrusions makes it possible to grind plastic materials in the form of waste plastics, frozen clay, fiber, rubber and DR. When creating new tool and other materials, it is sometimes necessary to obtain powder mixtures in the form of thin plates with a specific pattern on the surface. The use of a working body in a mill with a stepped working surface allows solving this problem with the highest productivity and quality.

The mill works as follows.

From the electric motor 10 by means of the shafts 5, 6 through the nodes 7. 8 mounting spiral 9 is rotated. The raw product to be processed is loaded through (1yuk 3 to the processing chamber 2 and, falling into the converging wedge spaces between the coils, is intensively destroyed. At the initial stage, the protrusions 13 allow better capture of pieces of material and destroy them with splitting effect, and then concentrate conditions in the local contact areas of the protrusions with a flat working surface, providing a high degree of grinding and dispersion.

The use of the invention in comparison with the known devices allows to intensify the workflow. The presence of protrusions makes the mill versatile, capable of processing various materials of their properties, as well as their activation and ovalization.

Claims (3)

Claim 1. A mill containing a grinding chamber mounted on a frame with hatches for loading material and discharging grinding products placed in the grinding chamber working body in the form of a tape toroidal-helical spiral fixed with its ends on the drive shaft and the axis of the additional support, characterized in that in order to intensify the working process, one of the working surfaces of the helix is made with protrusions and depressions alternately alternating in the radial direction relative to the center line of the helix and located on equidistant helix lines. five 1680321 6 2. Mill in π. 1, characterized in that the projections in cross section have the shape of a polygon. 3. Mill pop. 1, characterized in that the protrusions and depressions are made wavy. Fig.Z Fig A Fig.Z 6 1680321