SU77098A1 - Machine for the production of asbestos-cement and similar material - Google Patents

Description

The proposed machine is intended mainly for the production of asbestos cement sheets, but can also be used for the manufacture of other sheet materials (paper, cardboard, etc.).

The design of a circular machine (pap machine), used at the present time for the production of asbestos-cement sheet materials, has a number of sushi, natural flaws.

1. The mesh cylinder, on which the primary layer (film) of asbestos cement is formed, consists of a cast iron or iron lattice frame with a sparse brass mesh on it, over which is thick, 1 copper mesh.

Due to the close fit of the upper (first) grid to the lower (second), part of the openings of the first grid are covered with a wire of the second grid. In view of this, the living section of the upper grid decreases and the filtration resistance increases.

2. Between the upper grid and the cylinder frame, narrow winding passages are formed, easily clogged with particles of cement and asbestos and so40 Reduced. Release 1, hours. I. 1150

same increasing filtration resistance.

This circumstance necessitates the continuous flushing of the mesh shchlinder with water, carried out by multijet sprinkles. In order to allow water to penetrate into the gaps between the screen and the cage, water is fed into the showers under considerable pressure.

3. The washing water gets inside the net cylinder and; It is mixed with water in it, filtered through a mesh and containing some amount of cement and asbestos, carried along during filtration. This cement with asbestos must be returned to production to avoid loss of raw materials. If the filtered water was not diluted with wash water, it could be returned to production directly from under the mesh cylinders, as it flows out.

Owing to the strong dilution of the filtered water with wash water, it is necessary to use bulky septic tanks for the deposition of asbestos and cement.

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the lower part of which is water with a high content of precipitated asbestos and cement (supplied to cooking and drying, burning asbestos-cement mass, and from the upper part clarified water is supplied to washing the mesh cylinders.

4. Despite the continuous washing of the mesh cylinder with a large amount of water, cement gaps in the gaps between the thick mesh and the carcass encompass a solid crust, which must be washed out with a SOLID ACID to blow out with a rubber flapper. Such cleaning of the mesh cylinders causes rapid wear of their copper mesh.

5. The design of the machine requires the use of endless cloth to remove the asbestos-cement layer from the mesh cylinder and to feed it to the format drum. Under the conditions of asbestos-cement production, this cloth wears out extremely quickly, causing the consumption of significant funds.

The proposed continuous machine consists of an endless mesh tape, put on on Aliki and on flanged discs, immersed in a bath with a solution. As the tape moves through the bath, an asbestos-cement mass is precipitated from the solution under the influence of hydrostatic pressure.

A distinctive feature of the machine is the location in the bath of two discs with flanges, which together with the tape envelope form a cavity for collecting water separated from the solution, as well as the presence of supporting rollers preventing the tape from bending.

The machine (Fig. 1 and 2) consists of bath 1, in which diac 2 with flanges are immersed. 5, seated on an axle 3 rotating in bearings 4 extended beyond the bath (as with existing machines). The disks go around the endless copper grid 6, driven by the drive shaft 7 and tensioned by the tension rollers 8 and 9. The location of the rollers S and P depends on

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the extent of coverage of dias-2 with mesh 6. The drive shaft 7 may be covered with a layer of elastic material, for example, rubber.

The work of the machine is as follows.

When the drive shaft 7 rotates, the grid 6 comes into motion, turning the discs 2. A layer of asbestos cement formed on the grid from filtering. Asbestos cement mass in the bath passes through the grid above the Ba. Kj slot of the M-box 10, where it is partially dehydrated and fed to the format drum 12, on which it is coiled.

The screen 6 is washed with water from an ID of shower 11 located so that the wash water does not fall into the bath.

If the grid 6 has a considerable width and it is possible to be afraid of its bending between the disks under the pressure of asbestos-cement mass, then the device shown schematically in Fig. 2 is used. 3-4. It consists of a series of rollers 13 located between the disks 2 concentrically with respect to the axis of the latter. The rollers' axes 13 rotate at the ends of the spokes 14, which sit in sleeves 15, which are loosely mounted on axis 3. To prevent the rollers 13 from turning around axis 3, one of the sleeves 15 has a stem 1b, the end of which protrudes from the bath and attaches to the board last .

FIG. Figure 5 shows schematically a continuous pattern for producing an asbestos cement sheet in the form of a continuous tape. The ova consists of a series of machines, described above, installed in series and having instead of formatted drums a common endless canvas 17 with a smooth surface (made of rubber, leather, or the like, material). The web V7 is pressed by the shafts 18 to the drive shafts 7 with the same specific pressure as that of the format drum.

The work of the machine is as follows.

During the rotation of the drive shafts 7, the VEHICLE 17 comes into motion and removes the drive shafts 7 from the grids of the envelopes, the asbestos-cement layers on them, already partially dehydrated on the vacuum boxes 10. When going to the web 17, these layers are sealed by the pressure of the shafts 18 and are layered one on another, forming a sheet 19 (shown by dotted lines).

Subject invention

Claims (2)

1. A machine for the production of asbestos cement and a similar material, in which an infinite mesh tape is applied, propelled through a bath with a solution of acu & J sh of bestot cement and the like to precipitate it under the action of hydrostatic pressure suspended in a solution of solid particles, characterized in that in the bath to maintain the ribbon as it moves through the bath, two disks with flanges, bending around the ribbon and forming together with it a cavity for collecting separated water from the solution. 2. Machine. Claim 1, characterized in that as additional supports for the tape between the discs are installed rollers, freely planted on the axes. FIG. one 627 J 77098 V FIG. four op. o -, YU (