SU1219377A1 - Material disintegratin device - Google Patents

Description

The invention relates to the machining of materials, in particular extrudable, and can be used in the plastics, chemical, rubber-thermal industries, feed production and other fields.

The aim of the invention is to increase the grinding efficiency by eliminating sticking of the material on the blades.

FIG. 1 shows the proposed device, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 is a view B in FIG. one; in fig. 4 - knives; in fig. 5 shows a section B-B in FIG. four; in fig. 6 - section G-Y in FIG. four.

The grinding machine 2 is attached to the material feed mechanism - the extruder head 1, in the case of which two holes 3 and 4 are diametrically opposed. In the receiving hole 3 there is a filler of the material feeding mechanism - the head 1 of the striker, and hole 4 is intended to return coarse fraction inside the body of the grinding chamber 2. A rotor with blades 6, on which the knives 7 are mounted, is mounted on the shaft of the electric motor 5.

The grinding chamber is connected with the material pipeline 8 with the cyclone 9, inside which there is a separating surface 10. In the conical part of the cyclone, the gravity of the final product 11 and the gravity flow 12 of the coarse fraction are fixed, connecting the surface 10 with the chamber 2 through the opening 4.

The knives 7 are mounted to the cutting plane at an angle of 30-60.

The device works as follows.,

The material that escapes from the extruder head 1 is cut by knives 7 and discarded by blades 6 into material conduit 8, where it is picked up by air flow and transported to cyclone 9. As the particles move, the blade and the material line intensively cool the surface of the particles. In a cyclone on the separating surface 10, a particle size separation occurs: fine particles are sieved through a centrifugal force through a separating surface and removed

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by gravity 11, coarse particles by gravity 12 are returned to the grinding chamber 2. When re-grinding already hardened particles, he and

5 clean the cutting edge of the knives and blades from adhering plastic material.

The cut-off particle gets accelerated by colliding with a rotating 10 blade, while the particle velocity becomes equal to the air velocity in the heating material tube.

The inlet opening for the arrival of 15 NIN extrudates and the opening for the return of the coarse fraction are diametrically opposed in order to eliminate vibration and imbalance during the operation of the knives, while improving

20 conditions for self-cleaning knives.

Installing a separating surface in the cyclone and connecting it by gravity with a hole in the shredder allows you to control the size of the finished product, coarse the large fraction, cleaning the knives.

. The device makes it possible to grind extrudates that have sticky properties. This is achieved by the fact that the device provides for self-cleaning of knives from adhering material due to the return of a large fraction to repeated, grinding, and is caused by the value of the installation angle

knife to the cutting plane. The more the extrudate has sticky properties, the smaller the cutting angle must be, and vice versa.

Installing the knives at an angle of 30-60 to the cutting plane ensures the movement of the cut particle under the action of inertial force perpendicular to the blade of the knife and blade, and then under the action of ever-increasing centrifugal force along the blade. At the same time contact of non-cooled particles is minimized. I

The combination of knives with a fan prevents sticking of particles and provides a higher efficiency of energy transfer to the particle as it moves, which leads to a decrease in energy consumption for pneumatic0

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transportation of cut particles.

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Claims (2)

1. DEVICE FOR GRINDING MATERIALS, containing a grinding chamber with knives placed in it, mounted on holders mounted on an axis, a cyclone and a separator, while holes are made in the chamber in which material pipelines are installed to connect the chamber to the material feeding mechanism and a separator, characterized in that, in order to increase the efficiency of grinding sticky materials by eliminating their sticking to the knives, the knife holders are made in the form of fan blades, and the knives are mounted on them inclined to the plane cutting, with holes for installing material pipelines are diametrically opposed. 2. The device according to claim 1, wherein the angle of inclination of the knives to the cutting plane is 30-60 °. SU „,, 1219377