DE269085C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 269085 CLASS 50 «. GROUP

The present invention is and aims to provide a rice grinder economical design of the rice grinding machine in that on a single machine the same work result should be achieved as with two or more 'of the known Grinding passes is achieved.

This measure is known per se for similar machines, but for the current one Facility, further advantages are created by arranging certain ring channels, which are essential for rice cultivation.

The known grinding machines consist mainly of an emery compound occupied, downwardly tapering truncated cone (cone) on a vertical shaft, that of a Sieve jacket is surrounded.

The processing of the rice, the so-called grinding, takes place in the annular gap between the conical surface of the rotating working body and the fixed screen jacket, which is interrupted by rubber brakes. The processed flour falls through the sieve jacket outwards, while the processed rice emerges from the annular gap at the bottom and is promoted according to a special procedure.

The shape and dimensions of the grinding cone and the screen jacket have been proven in practice formed. On the one hand, the downward tapering causes a corresponding congestion of the material passing through and, on the other hand, a better separation of the grinding flour. .

The performance of such a machine is limited because of the enlargement of the work surface by increasing the diameter beyond a certain amount is inexpedient for practical reasons and The increase in height without special precautions would be flawed by the necessary Conical inclination causes a smaller lower 'diameter of the annular gap, which is around the smaller it becomes, the higher the working body is chosen. The size of the bottom from the annular gap is solely decisive for the quantity output. This results in Increasing the height instead of an increase in performance means a reduction in performance. The peeled material but is dammed too much even at the greater height and the smaller annular gap outlet, making it warm and sticky and smeared. It will be in spite of the higher power consumption and the reduced performance then useless.

The present invention aims to obviate the mentioned drawbacks in any one Increase in the work surface and consequently an increase in the work performance with the same Diameter compared to the known grinding machines for rice and the like.

This is achieved by the fact that the raised working body or that surrounding it Sieve through one or more, all-round expanded spaces (ring channels) divided into two or more work zones. The ring channels allow ventilation and Prevent the peeled material from spreading

thereby the excessive back pressure and the heating of the goods.

The drawing represents in Fig. Ι the vertical section an embodiment of the invention, in which the working body consists of two identical conical surfaces. Fig. 2 shows the corresponding horizontal section through the ring channel.

The working body consisting of two truncated cones located one below the other is attached to the vertical shaft α. It can be dismantled into three parts for easier removal and consists of the upper cone b, the lower cone c and the hub disk d. The ring channel e is formed between the upper and lower cones. The working body is mounted in the housing f , into which the upper and lower sieve segments g and h are inserted, which surround the conical surfaces covered with emery compound at a small distance. The rubber jaws or brakes i and k can be adjusted between the screen segments. Air inlet ducts I are arranged between the upper and lower brakes and are covered with a sieve to prevent the peeled material from being thrown out. The air is sucked through the sieves and out of the housing f at m .

The peeled material runs on the upper cone b and is processed between it and the sieve g , the rubber brakes preventing the peeled material from being taken along in the periphery. After leaving the upper gap, the material falls into the ring channel e, where it can spread and fresh air flows through it, in order to then run into the gap between the lower cone c and the lower sieves h , where it is again prevented by rubber brakes k , to participate in the rotation of the cone. After the peeled material has also left this gap, it falls into the annular channel 0, from which it is conveyed by the scraper p to the outlet q . The peeling flour emerging from the sieve segments falls into the annular channel r and is conveyed by the flour scraper s to the flour drain t .

Such a sanding step does as much as two successive sanding steps of the previously known design, but requires less space and strength and only so much storage and drive, as a single known grinding pass.

The design can be modified so that a single high cone with a screen jacket is brought into use, the cone or the screen jacket or both through annular channels be divided into two or more zones and the distance of the screen jacket from The cone increases somewhat in areas downwards. The main thing remains with all types, that the peeled material spreads out in each annulus, is ventilated and enters the following working gap without back pressure can.

Claims (1)

Patent claim: Grinding for rice 0. The like. With vertically rotating grinding cone, characterized in that the grinding cone consists of several parts, between which expanded and ventilated annular channels (e) are arranged. 1 sheet of drawings.