SU862975A1 - Disintegrating apparatus - Google Patents

Description

(54) DEVICE FOR CRUSHING

I

The invention relates to the recycling of SECONDARY materials and, in particular, relates to the shredding of cardboard waste, polymer containers 36 materials, wood chipboard, plywood, worn-out tires for passenger cars, glass, brick

bo and T.nv

A device for shredding waste is known that contains high-speed engines installed rotatably in opposite directions. shaft and low-speed shafts with serrated disks C fitted on them. The device closest to the invention in its technical essence and effect is a device containing shafts mounted for rotation opposite to each other and fitted with cutting circular knives mounted on them in pairs, and a fixed knife equidistant from the axes of rotation of the shafts 2.

However, the known devices provide only coarse grinding of the treated waste. This reduces the bulk weight of the resulting crushed material and increases the cost of its transportation.

The purpose of the invention is to increase the degree of grinding of the material.

This goal is achieved by the fact that in a device for grinding material, containing shafts mounted rotatably towards each other and fitted with disk knives mounted in pairs on them, and a fixed knife equidistant from

There are 10 axes of rotation of the shafts, the latter is made in the form of a comb, the teeth of which are mounted in a-chessboard order at an angle to each other and are provided with a face and lateral blade with cutting edges.

15

Figure 1 schematically shows the device, a cross-section in figure 2 - the same, top view / in figure. A fixed knife, view A in figure 1; figure 4 - section bb in figure 1.

20

The device contains shaft 1 and 2 mounted for rotation towards each other with disk knives 3 mounted on them in pairs. The disk knives 3 have a main 25 cutting edge 4, side cutting edges 5 and auxiliary cutting edges 6. Under the disk knives 3 are equally spaced from the axes of rotation of the shafts 1 and 2 a fixed knife 7 is installed, equipped with teeth 8. Knife 7

thirty

has a face cutting edge 9 and juice cutting edges 10 and 11, the Disk knives 3 are located along the axis of the shaft in a spiral and offset relative to each other by 60 °. Spacers 12 are installed between the two pairs of circular knives 3. The circular knives 3 enter the recesses 13 formed between the teeth 8 of the fixed knife 7.

The device works as follows.

The grinding process is carried out in two stages. In the first stage, as the shafts 1 and 2 rotate towards each other at different speeds, the feed material is captured by the disk blades 3 and fed to the grinding zone. Here it is first torn by the cutting edge 4 or 6, cut by the edge 5 and torn by the difference in the speeds of rotation of the shafts 1 and 2. The resulting pieces of material are of considerable size.

The second grinding stage is carried out with the movement of the disk knife 3 in the recess 13 between the teeth 7 of the fixed knife. At the same time, the pieces of material are first burst with a cutting edge 1 of a disk knife 3 and with an end cutting blade 9 of a fixed knife 7, and then rifling in the transverse direction with side cutting edges 10 and 11 of the knife 7.

Thus, the proposed device allows increasing the degree of waste shredding in 3 times a day.

Claims (2)

1. USSR author's certificate number 680907, cl. B 02 C 4/02, 1976. 2.Prospect and technical description to the shredder. Firm Sant Andrea Novara, Italy, 1976. Pnnn W ff /