SU1242386A1 - Granulator apparatus - Google Patents

Description

The invention relates to devices for granulating plastic materials and can be used in the chemical, petrochemical and tire industries, in particular, for granulating polymeric materials.

The purpose of the invention is to improve the quality of granulation and the productivity of the device.

FIG. 1 shows the device; in fig. 2 - section aa and n of fig. one; in fig. 3 is a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. 3 ..

The device contains a wormhole machine with a die head, on the cylindrical surface of which there are holes for the passage of dispersible material, and on the end surface there is a blind hole for mounting the bearing 2, which serves as a support for the knife device. The blades of the knife device are the bearing 2 and the bearing located in the support 3. The knife device is driven from a drive (not shown).

The knife device consists of a disk 4, on which a protective casing 5 and air intake blades 6 are fastened. The protective casing 5 prevents the cut particles from falling into the air intake area, eliminates clogging of the knives 8 cavity and is made in the form of a disk, a conical element or a pipe segment . The disk 4 has holes 7 connecting the internal cavities of the knives 8 with the internal cavity of the protective casing 5. The knives 8 are made in one piece with the disk 4 by milling. On the working edges of the knives 8, the blades 9 are reinforced, and on their end sections a disk 10 is fixed, which serves to increase the stiffness of the knives 8 and to block the internal cavities of the knives 8 from the end

parties. The air intake blades 6 are installed near the holes 7 of the disk 4 and are made in the form of an inclined or curved plate with an inclination in the direction of rotation.

The device works as follows

Rubber under pressure created by

the screw of the screwdriver, enters the die head 1, from which the holes are squeezed out in the form of harnesses. When rotating the disk 4, the knives 8 with their blades 9 cut

bundles on the pellets.

The air flow entering the protective casing 5 by the air intake blades 6 is directed and injected into the holes 7 of the disk 4. The entrance to the internal cavity of the knives 8, limited from the end surface

disk 10, the air has the ability to escape through the gap between the die head 1 and the knife 8, which eliminates the appearance of circulating currents that contribute to the drift of polymer granules into the internal cavities of the knives 8.

The air outflow from the cavity of the knives 8 results in the appearance of air flow coinciding with the direction of the centrifugal force, as a result of which the particle retention B of the air vortices behind the blades 8 is eliminated and the probability of sticking of the obtained granules decreases to form larger particles. This embodiment allows simultaneously with the granulation to lead the process of drying rubber from moisture or hydrocarbon solvent.

The elimination of the driving of the knife cavity and the saltiness of the surface of the die head improves the process reliability and the productivity of the granulator. At the same time, it is possible to organize a continuous process of granulation and pneumatic transport of the removable and cooled granules to cyclones.

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VNIIPI Order 3657/20 Circulation 640 Subscription Branch of the PPP “Patent, Uzhgorod, ul. Project, 4

Claims (1)

GRANULAR DEVICE containing a die head and a disk with knives connected to a rotation drive, characterized in that, in order to improve the quality of the granulation and productivity of the device, it is equipped with air-intake blades mounted on the disk, the holes being made through the latter, and in the knives - cavities communicating with holes in the disk. FIG. 1>