RU28340U1 - DISINTEGRATOR FOR GRINDING RUBBER BABIES - Google Patents

Description

cutting knives on a floating disc, and after each replacement of knives to balance the disc, as the disc rotates at 3000 rpm during operation.

The purpose of the proposed utility model is to develop the design of the disintegrator for grinding rubber crumb with the beater of a significantly improved design, namely, on each beater, many cutting teeth must be performed.

The specified technical result is achieved as follows. In a classic-type disintegrator, containing a case mounted on a foundation base, in which two rotors are installed with beats that are strengthened around the circumferences on end surfaces in several rows and rotate in opposite directions in pairs, as well as a rubber crumb loading hopper and a recycled rubber mass receiving hopper, In contrast to the known disintegrators, in the proposed - the beats are made in the form of pointed dihedral wedges. In this case, the wedges are directed in pairs towards each other with pointed ends, respectively, along the circles on each rotor, and on both faces of each beat several rows are made with several cutting teeth in each row.

These teeth have, for example, a triangular shape in the profile, and the gap between the cutting edges of the teeth moving towards each other beat respectively on the two rotors is set to as small as possible. And the gap between the cutting edges of the teeth of the following pairs of beats located on circles remote from the periphery of the rotor is set correspondingly smaller than that of previous pairs of beats located closer to the axis of the rotor.

As a close analogue to the proposed Disintegrator for grinding crumb rubber, you can take the device according to the source of scientific and technical information (1).

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- g List of figures in the drawings.

Figure 1 shows schematically the proposed disintegrator in section, side view.

In Fig. E shows a partial view according to A of Fig. 1 on two rotors of the disintegrator. Figure 3 shows a partial view along BB of Figure 2.

The proposed disintegrator for grinding rubber crumb consists of the following units, components and parts.

On the foundation base 1 is installed the casing 2 of the disintegrator (Fig.1,2,3). On the respective bearing bearings and mounted on the shafts, a rotor 3 and a rotor 4 are installed, rotating in opposite directions.

On each end rotor, on the end surface, there are several rows of beats 5 reinforced in circles. At the same time, beats 5 are made in the form of pointed dihedral wedges, and when the rotors rotate, the beats move towards each other with pointed ends, and on both sides of each beat several rows with several cutting edges are made teeth in each row.

The tooth profile is made, for example, of a triangular shape with a pitch of 2-3 mm between rows or more. The gap between the cutting edges of the wedge-shaped beams moving towards them, respectively, on the two rotors is set to a minimum (between the nearest edges).

The gap between the cutting edges of the teeth of the beats located on the circles more distant to the periphery of the rotor can be set slightly smaller than between the beats located closer to the axis of the rotor.

In the rotor 4 there are several windows for loading into the space between the rotors 3 and 4 of the rubber crumb from the hopper 6.

The proposed disintegrator works as follows. Rubber crumb from the hopper 6 by gravity through several windows in the rotor 4 enters the space between the rotating high

speed and in opposite directions by rotors 3 and 4. Particles of rubber crumb under the action of centrifugal forces fall

between the cutting edges of the set of cutting teeth located on the bills of the pairs nearest the axis of the rotors beat. The rubber crumb that fell between the cutting edges is easily cut into small particles. Due to the pointed shape of the cutting edges of the teeth and in combination with the impact on the rubber particles, plastic deformations do not have time to develop in these particles (crumbs). Therefore, the material of the deformable body in the contact zone with the pointed cutting teeth acquires a flow property and behaves like a liquid during the impact time.

A sharp tooth, moving freely inside the rubber edge, easily cuts it into smaller particles. And the minimum gap between the cutting edges of the teeth contributes to the creation of abrasive effects on the rubber material, which ensures finer and finer grinding of crumb rubber.

The second peripheral row of beaters on rotors 3 and 4 provides finer grinding of those rubber particles that were not sufficiently ground in the front row of beaters, since the gap between the cutting edges of the teeth here is slightly smaller than in the previous row of beaters. After that, finely ground rubber mass enters the receiving hopper 7.

In the proposed disintegrator, the specific energy costs are noticeably reduced.

With a sufficiently high speed of rotation of the rotors 3 and, for example, 2500 rpm, the fineness of grinding rubber crumb reaches

M (G (G 4 p

the size of 0.08 mm. With this fineness of grinding, the rubber crumb activated in the disintegrator reaches almost 100% dissolution in the oil tar. A crushed rubber crumb in a ball mill in a state of deep cooling, for example, with liquid nitrogen has only 85% solubility.

Literature: 1. A device for grinding rubber-fabric materials according to the description of the invention to A. with. SSOR R 870182, IPC class В 29 Н 19/06, В 02 С 18/02, published in BI Р 37 07.10.81.

APPLICANT: / A PROKOPETS B.C ..

Claims (2)

1. A disintegrator for crushing rubber crumb, comprising a body mounted on a foundation base, in which two rotors are mounted with beats mounted on their end surfaces around the circumference and rotating in the opposite directions is a rubber crumb loading hopper and a receiving hopper of the processed finely ground rubber mass, characterized in that the beaters are made in the form of pointed dihedral wedges directed towards each other with pointed ends respectively on each rotor, while on both ranyah each beat performed several rows with several cutting teeth in each row having at least a triangular profile, a gap between the cutting edges of teeth moving in opposite directions wedge beat set minimum possible. 2. The disintegrator according to claim 1, characterized in that the gap between the cutting edges of the teeth of the beats located on circles more distant to the periphery of the rotor is set accordingly smaller than between the beats located closer to the axis of the rotor.