Disc mill

 

The invention relates to the food industry and can be used in devices for grinding coffee. Disc mill includes a housing in which are placed coaxially driving disk mounted on the drive shaft, and passive ROM installed with the possibility of free rotation. One of the discs is provided with an opening for loading a comminuted product, and the working surface of each disk is equipped with an external, middle and inner zones of the grooves with different number of grooves of different length and width of the grooves and different orientation angle of the grooves relative to the radius of the disc. Surface of the middle and inner zones are located at different angles to the plane of the disk. The outer surface of the belt parallel to the plane of the disk, and the number of grooves of the middle zone is equal to the number of grooves of the outer belt, the number of grooves of the inner belt six times less than the number of grooves of the middle or outer belt and the grooves of the middle belt and the groove outer belt coupled together at their point of connection. Is ensured with a high output fine grinding coffee without sacrificing the quality of a comminuted product. 3 C.p. f-crystals, 9 Il.

is the properties for grinding grain products, for example, coffee.

Known disc mill (U.S. Pat. RU # 2077130), comprising a housing, provided with inlet and discharge openings, and hopper. Inside eccentric relative to each other posted by driving disk, console mounted on the drive shaft and provided with a Central opening for loading a comminuted product in the inter space, and placed on a shaft attached to the housing, passive ROM, installed with the possibility of free rotation, while the passive disk is mounted with the possibility of changing eccentricity relative to the master drive. The grinding surface of each disk consists of inner and outer zones with grooves in the form of concentric circles, and placed between the inner and outer zones of the middle belt with grooves whose width is 1/5-1/4 of the width of the outer belt, the step and the depth of the flute of the middle zone is equal to the simple average of the values of step and depth of riffles inner and outer zones, respectively.

This device has a high performance, however, as in the known device the leading and passive disks installed with eccentricity, it may not use the prostranstva.

It is also known a device for grinding solids (WO 01/94021), comprising a housing, inside which there are two coaxial disc, one of which is fixed on the shaft, and the other provided with a Central opening for loading of the product, with both discs installed with the possibility of axial rotation relative to each other. On the grinding surfaces of disks made three belt grooves, with decreasing width of the step grooves from belt to belt and different orientation directions of the grooves in each zone, namely, decreasing from the center to the periphery of the angle of inclination of the grooves to the radius of the disc.

This device also does not allow for fine grinding of coffee. In addition, since the processing of grain is discrete, there is provided a continuous flow of product to the output device.

The objective of this invention is to provide a disc mill, allowing for high performance, fine grind coffee without sacrificing the quality of a comminuted product.

The problem is solved in that in a disk mill, comprising a housing in which are placed coaxially driving disk mounted on the drive shaft, and passive ROM installed with enabled the working surface of each disk is equipped with an external, the middle and inner zones of the grooves with different number of grooves of different length and width of the grooves in each zone and different orientation angle of the grooves relative to the radius of the disc, according to the invention, the outer surface of the belt parallel to the disk plane, the surface of the middle and inner zones are located at different angles to the plane of the disk, and the number of grooves of the middle zone is equal to the number of grooves of the outer belt and the grooves of the middle belt and the groove outer belt coupled together at their point of connection.

In addition, the angle between the inner surface of the belt and the plane of the disk is larger than the angle between the surface of the middle belt and the plane of the disk; the grooves of the middle belt have the greatest length and greatest orientation angle relative to the radius of the disc; the grooves of the inner zone have the triangular form of longitudinal and transverse cross sections of the groove of the middle belt have a triangular cross-sectional shape, and the grooves of the outer belt-shaped grooves.

The performance of the disk surfaces as advertised allows to obtain a continuous flow of product at the exit of the mill. Since moving the product from the belt to the belt occurs as compliance with the working surfaces, what prevents heat and, therefore, excludes the change in the taste properties of the finished product.

The invention is illustrated by drawings. In Fig.1 shows the device of Fig.2 - design of one of the disks from the working surface; Fig.3 - section a-a in Fig.2; Fig.4 is a section along B-B in Fig.2; Fig.5 - section b-b In Fig.2; Fig.6 is a view along arrow a in Fig.2; Fig.7 - section G-G in Fig.2; Fig.8 - section d-D in Fig.2; Fig.9 is a view along arrow b of Fig.2.

Disc mill (Fig.1) includes a housing 1 in which are placed coaxially driving disk 2 mounted on the drive shaft 3, and a passive disk 4 mounted with the possibility of free rotation, with one of the disks, for example, the disk 2 (Fig.2), provided with a hole 5 for loading a comminuted product, and the working surface of each of the disks 2, 4 are supplied by three belt grooves - inner belt 6, the middle belt 7 and the outer belt 8, respectively, with the grooves 9, 10, 11. The outer surface of the belt 8 is parallel to the plane of the disk 2, the surface of the middle and inner zones 7, 6 are located at different angles to the plane of the disk 2 (see Fig.8). The angle between the inner surface of the belt 6 and the plane of the disc 2 is more of the angle between the surface Creek, length and width of the grooves, and the orientation angle of the grooves relative to the radius of the disc. The number of grooves 10 of the middle zone is equal to the number of grooves 11 of the outer belt. Grooves 10 middle belt 7 have the greatest length and greatest orientation angle relative to the radius of the disc 2. The choice of the angle of inclination of the grooves 9, 10, 11 in each zone is determined experimentally and is caused by the hardness of the material of the disk 2 (4) and the rotational speed, and configuration of the grooves 11 in the output.

Grooves 9 of the inner belt 6 has a triangular shape transverse and longitudinal cross sections, for example, the corners of the aperture 55-60(see Fig.6, 8); grooves 10 middle belt 7 has a triangular cross-sectional shape (see Fig.3) with an angle of aperture of, for example, 55-60. Grooves 11 of the outer belt 8 is made in the form of grooves and are associated with the grooves 10 of the middle belt 7 in the connection (see Fig 4, 8, 9).

For example, as shown in Fig.2, the number of grooves 10 middle belt 7 and, respectively, the number of grooves 11 of the outer belt 8 is 108, and the number of grooves 9 of the inner belt 6 six times less. The inner surface 6 of the belt is an angle of the order of 40with the plane of the disk g> (see Fig.4).

The size of the grooves 11 is determined by size fraction at the outlet. For example, when grinding coffee “under Turku depth of the grooves 11 may be 0,17 mm Groove 10 get on the disc surface milling, so their width gradually increases from the center of the disc to its periphery and in connection with the grooves 11 is equal to the width of the grooves 11. Debugging output grooves 11 carry out the required shape and size of the particles of the product output.

The device operates as follows.

Treatment of the product in the device is a triple junction: coming through the Central opening 5 in the disk 2 grains are captured in the grooves 9 of the first belt 6 and are subjected to preliminary crushing “saw”, formed by the teeth grooves 9 having a triangular shape. This form grooves 9 and their orientation, namely, at an angle relative to the radius of the disc 2, the grooves 9 are also tightening and pushing product to the middle belt 7 of the grooves 10. In the grooves 10 of the belt 7, which is the main work, and so is the longest, is the capture of the product, its translational movement with simultaneous twisting motion, which is postmillenial necessary size and output ground product occurs in the third stage - in the grooves 11 of the outer belt 8.

Thus, the claimed design has a continuous three-stage scheme grinding product with simultaneous continuous movement of its particles that have reached a certain size, from one stage to another until the product of a given faction.

Continuity of movement from the loading hole 5 to the exit is ensured by the choice of the angles of the surfaces of the belt grooves, the ratio of the length of the grooves in the belts and the corresponding location of the grooves is not on the disk radius, and at an angle thereto, with the result that the product does not accumulate at the exit of each stage. The continuity of movement in the process prevents the jam product, in which he may become hot due to the heating of the friction surfaces of the disks, and even ignite, which could, in turn, worsen the taste and even damage. In addition, highly efficient grinding performed using this device allows you to work with a lesser rate of rotation of the shaft, which also leads to reduction of heat moving parts of the device, and thus prevents overheating of the product.

2. Disc mill under item 1, characterized in that the angle between the inner surface of the belt and the plane of the disk is larger than the angle between the surface of the middle belt and the plane of the disk.

3. Disc mill under item 1 or 2, characterized in that the grooves of the middle belt have the greatest length and greatest angle of orientation relative to have a triangular shape with longitudinal and cross-sections, grooves of the middle belt have a triangular cross-sectional shape, and the grooves of the outer belt-shaped grooves.

 

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FIELD: food engineering.

SUBSTANCE: apparatus has rotating knife equipped with grinding blades located on its upper surface and driven into rotation by means of engine, immovable knife arranged in spaced relation above rotating knife and equipped with grinding blades located on its lower surface, and central charging opening. Rotating and immovable knives are disposed within case equipped with opening for discharging of coffee bean ground products placed between rotating and immovable knives, and guiding pipeline. Apparatus is further provided with worm wheel connected with immovable knife for lifting and lowering thereof, worm drive meshed with worm wheel teeth for rotating of worm wheel, and control engine adapted for rotating of worm drive in forward and backward directions. Guiding pipeline is provided with distributor adapted for supplying of predetermined amount of ground coffee beans.

EFFECT: simplified controlling of size of ground coffee bean particles, delicious taste and aroma of coffee beverage extract.

6 cl, 3 dwg

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