SU1521428A1 - Arrangement for grinding cacao beans - Google Patents

Abstract

The invention relates to the production of cocoa products. The aim of the invention is to improve the quality of the product by increasing the degree of grinding of cocoa beans. The goal is achieved by the fact that in a device comprising a housing 1, a cover 2 with channels 3.4 and 5 for coolant, coaxially arranged horizontal shafts 6 and 7, on each of which a disk (8, 9) with protruding pins 10 is vertically mounted, arranged in concentric rows so that the pins 10 of one disc are placed between the pins of the other disc, alternating concentric grooves of a triangular and trapezoidal profile are made on the surfaces of the discs 8 and 9 on the placement side of the pins 10. The grooves of the triangular profile have an angle at the apex of 15 °, and the grooves of the trapezoidal profile have side surfaces inclined at an angle of 35 °. The protruding portion of the pins 10 has an expanding shape with a taper angle of 20 °. The shaft 6 is hollow with six spiral grooves 13 of rectangular shape. The presence of grooves contributes to a greater destructive effect of the device on the product to be milled and thereby increase the grinding degree. 2 Il.

Description

that the pins 10 of one disk are placed between the pins of another disk, on the surfaces of disks 8 and 9 on the placement side of the pins 10 alternating concentric grooves of triangular and trapezoidal profiles are made. The grooves of the triangular profile have an angle at the apex of 15, and the grooves of the trapezoidal profile have side surfaces inclined at an angle of 35 °. The protruding portion of the pins 10 has an expanding shape with a taper angle of 2fl. Hall 6 is hollow with six spiral grooves 13 of rectangular shape. The presence of grooves contributes to a greater destructive effect of the device on the product being crushed and, thus, to an increase in the degree of grinding, 2 sludge.

The invention relates to the production of cocoa and cocoa products, namely, devices for grinding cocoa beans.

The aim of the invention is to improve the quality of the product by increasing the degree of grinding of cocoa beans.

FIG. 1 shows the device, a general view; in fig. 2 — node I in FIG. one.

A device for grinding cocoa beans includes a housing 1, a lid 2 with channels 3-5 for coolant, coaxially arranged horizontal shafts 6 and 7, on each of which a disk (8 and 9) is vertically mounted with protruding pins 10 positioned concentric rows so that the pins 10 of one disk (8) are placed between the pins 10 of another disk (9). On the surfaces of the disks 8 and 9, alternating concentric grooves of a triangular 11 and a trapezoidal 12 profiles are made on the placement side of the pins 10. The groove 11 has an angle at the apex of 15, and the groove 12 has side surfaces inclined at an angle of 35 ° to the axis of the disks 8 and 9, while the projecting part of the pins 10 has an expanding shape with a taper angle equal to 20 Shaft 6 is hollow with six spiral grooves 13 rectangular shapes.

The device works as follows.

The product is fed into the hollow shaft 6, is thrown by centrifugal force onto its walls, crushed and transported in spiral grooves 13 to the central part of the device. Then, under the influence of centrifugal force, the product moves from the center to the walls of the housing 1 and is crushed as a result of strikes on the pins 10 and

the surfaces of the grooves 11 and 12 located on the working surfaces of the disks 8 and 9.

The crushed product falls on the walls of the housing 1, is cooled by

due to the fact that cooling fluid is constantly flowing in channel 3, and the stack along the walls is removed from the device. Working discs 8 and 9, rotating at a speed of 3000 rpm, are mounted on shafts 6 and 7, which are supported by bearings, the cooling of which is carried out with liquid, flowing in channels 3 and 5.

The presence of spiral grooves 13 of rectangular cross-section, cut on the inner surface of the hollow shaft, affects the increase in the degree of grinding and the service life of the grinding pins.

under the action of a fairly significant centrifugal force, the particles hit the edges of the grooves inside the hollow shaft 6, the cylindrical surface is crushed, and then the spiral

the grooves are transported to the central part of the device. Pre-grinding increases the final degree of grinding of the product, as well as affects its abrasive ability, which

increases the service life of the grinding pins.

Due to the presence of grooves of a triangular and trapezoidal shape on the working surfaces of the disks with wall tilt angles of 15 and 35 °, the grinding ability of the device increases, since the product particles, hitting a large number of sharp edges, are crushed more intensively.

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In addition, when striking the walls of grooves made from different angles, an additional random movement of particles is created, which also increases the degree of grinding of the product. The angles of inclination of the walls were chosen experimentally as a result of testing various types of grooves in the disks in operation.

The degree of grinding is also enhanced by the use of pins 10, which have an expanding shape with a taper angle, which leads to an increase in their service life.

Claims (1)

Invention Formula A device for grinding cocoa beans, comprising a housing, a lid with coolant channels and two coaxially spaced horizontal / 5 20 eight The shaft, each of which is vertically mounted on a disk with protruding pins arranged in concentric rows so that the pins of one disk are placed between the pins of another disk, characterized in that the disk surfaces on the placement side of the pins are made alternating concentric grooves of a triangular and trapezoidal profiles, and the groove triangle-. profile has a corner angle of 15 °, and the groove of the trapezoidal profile has side surfaces inclined at an angle of 35 k the axis of the discs, while the protruding part of the pins has an expanding shape with a taper angle of 20 °. gjus.2.