SU837963A1 - Method of making fibrous sheet and prifiled articles - Google Patents

Description

(54) METHOD OF MANUFACTURE OF FIBROUS SHEET AND PROFILE PRODUCTS

All products of the amount of binder and the rest of the binder are injected during the formation of the billet at the exit of the last bath.

With such a filtering process, the viscosity of the suspension will be uneven during the movement of the mesh: in the exit zone of the preform layer from the bath, the viscosity will be higher than in the rest (along the length of the mesh) bath zones, and due to a decrease in the suspension viscosity baths will increase and the overall filtration rate, i.e. The process of vacuuming the vanilla will be accelerated. .

The drawing shows an installation for the production of fibrous sheet and profile products.

It contains a bath 1 with suspension 2, a tank 3 for feeding the suspension into bath 1, a nozzle L for introducing a binder, installed at the outlet of the mesh cylinder 5 from the bath. A vacuum filter 6 is placed inside the mesh cylinder. The installation also contains a roller 7 for pre-pressing the preform layer B, as well as a conveyor 9. Figure 1: Preparing a quantity of clay bond in the tank 3 for basaltic fiber production 10%. it is fed into the bath 1. Then the preform layer is formed by vacuum suction at a vacuum of 0 MPa of suspension onto the mesh cylinder 5. Moreover, during the formation of the preform layer, the remaining 90% of the binder and 4. When nozzle formov.anii products of the present method the workpiece 70% layer thickness (14 mm) molded at filtratski suspension depleted binder. and the remaining 6 mm of the layer - with increased containment. ,,

Table 1 presents the indicators of light products.

 .Table 1

Bulk mass of the product, kg / m

The content of the binder in the product,%

The tensile strength of the product at break, MPA with bending, MPA

The compressibility of the samples under the action of a specific load of 0.002 MPA,%

 Example 2. A suspension of basalt fibers and 40% of the amount of clay binder required for the manufacture of products is prepared and fed into a bath. Then a 20 mm sai OTOBkH layer is formed by vacuum suction at a vacuum of 0.06 MPa suspension on a set of 150 12

0.11 0.10

chati cylinder. At the same time, when forming the preform layer at the exit of the latter from the bath, 55 the rest 60% of the binder from the nozzle is introduced into the suspension.

Indicators of the products obtained are given in table 2.

The time of formation of a layer of 3 agots, mi n

Volume 1mSa products, kg / m

The content of the binder in the product,%

Strength of products:

at rupture of MPA priizgibe MIIA

Compressibility of specimens under a specific load of 0.002 MPA,%

Thus, the proposed method allows to significantly increase the speed of production of products by speeding up the process of vacuum pressing, without changing their basic physical and mechanical properties.

Claims (1)

1. USSR author's certificate in application 251049b, cl. C 04 B 43/02, 1977 (prototype).