SU351577A1 - FOR GRINDING MATERIAL MILLS-POLYMER - Google Patents

Description

The invention relates to the production and processing of polymer materials, 10FJ.

A known mill for grinding iolimer materials containing a corius, parallel-mounted shafts, each of which is filled with a set of disks, provided at the periphery with protrusions that fit into the corresponding depressions of the disks of the other shaft, and a bunker. However, such a mill does not provide high-quality grinding of plastics.

The purpose of the invention is to eliminate the IE of the Levid fraction during crushing and increased productivity. This is achieved by the fact that inside the housing above the shafts, the removable wedges are rigidly mounted, in the form of a wedge, the base of which is provided with a comb corresponding to the profile of the protrusions of the shaft disks.

In the case under the discs there is a sieve, made in the form of a flat plate, bent in the center of the line, parallel to the longitudinal axis of the shafts. In addition, there is a notch on the forming surface of the disks.

FIG. 1 schematically shows the mill, general view; yes figs. 2 - knot of cutting disks; on fit. 3 - scheme of a stripper with a comb.

The mill contains a housing /, inside of which are placed rotors 2, mounted on shafts 3, bunker 4, sieve 5 and ed (minikn 6. The rotor is made in the form of a set of tightly fitting each other disks 7 mounted on shaft 3, each of which it has on (Ieriferiya, along a circumferential ledge, (For example, a monogram is used, and a notch along the forming surface of the disk 8.

The shafts 3 of the rotors 2 are mounted parallel to each other in the housing, at which the protrusions of the disks of one rotor fit into the corresponding ledges formed by the disks of the second rotor with a gap. Above the rotors are installed non-movable pullers 6, made in the form of a wedge, the base of which has a comb 9 corresponding to the negative profile of the rods 7 of the rotor 2. In the lower part of the core, the sieve 5 is installed in the form of a flat plate curved in the center along the line parallel to the longitudinal axis of the rotor shafts, moreover, the bend of the sieve is directed inward of the mill housing.

The mill works in the following way.

The material in the form of granules or crumbs fall asleep in the bunker 4, from which it falls between the thin-walled rotor discs that run through the KpOiMOK. After the first cutting of the granules, the particles in (Kind of discs equal to the diameter of the granules,

buried in the bunker 4, remain in the gap between the discs of 7 rotor and 2 and return to the trimming. To extract these | Per, hivno particles cut from above, on each rotor 2 a stripper 6 is installed. Grinder 9, which, in addition to pushing the particles out of the interdisk gaps, direct them along with the granules to the dorezku. In the secondary cutting of discs, bars are obtained with a thickness equal to the disc gaps and a length equal to the diameter of the initial granule. Such bars again become attached to the disks 7 bars and fall for the third time into a cut, while cubes are obtained from the bars with the sizes of the sides equal to the gaps between the discs, or slightly less gaps. Such particles already “do not get stuck between the discs, but fall down on the sieve 5 and, through it, fall into the collection of finished arduction. Particles WHY HAVE DON'T hold between the discs 7 and fell onto the sieve 5, but didn’t go through the sieve, wrap around the sieve into the wedge-shaped (Space, where, jammed between the inner surface of the housing 1 and the notch 8 of the disc 7, carry around. In order to lift these particles by jamming between disk 7 and case 1, a corresponding gap equal to half the disk gap is expected.

In this case, the pulverized fraction does not receive 1c, since the subsequent cutting and reduction of particles of polymeric materials, both fragile and viscous, will rather fall down on the sieve than will be carried away to the Top for grinding.

Subject invention

Claims (3)

1. A mill for grinding polymeric materials, comprising a housing, parallel-mounted shafts, each of which is made with a set of discs, circumferentially provided with protrusions, included in the respective possessions of the discs of the other shaft, and a bunker, characterized in that, in order to eliminate pulverized fractions when crushing and increasing productivity, inside the body above the shafts are rigidly mounted pullers made in the form of a wedge, the rigging of which is equipped with a comb, corresponding to the profile of the protrusions of the shaft disks. 2. Mill according to claim 1, characterized in that in the case under the disks there is mounted a sieve, completed in the form of a flat plate, bent in the center along a line parallel to the longitudinal axis of the shafts. 3. Mill by no. 1 "2, characterized in that a notch is made along the Forming surface of the disks. Va2. 2 9ig J