SU565822A1 - Method of combined 'face-down' forming of two-ply laminated panels - Google Patents

Description

one

The invention relates to the production of building materials, mainly from concrete, and can be used in the manufacture of large double-layer products with a finishing layer, for example, from polymer-resistant concrete.

The known method of the combined form of two-layer products. However, it does not allow to obtain a high quality finishing layer when forming a large-sized double-layer panels face down.

There is also known a method of combined molding of two-layer panels face-down, which consists in the layer-by-layer molding of the lower and upper layers, methods closer to the described invention. However, this method does not allow to obtain a uniformly thick lower finishing layer characterized by increased ductility.

The purpose of the invention is to improve the quality of products.

This is achieved by those. That a strip of sheet material is placed on the shaped bottom layer, which is removed after the formation of the upper layer.

 The essence of the method lies in the fact that a gasket, usually of metal, with a non-adhesive coating is placed on the molded bottom layer. It is introduced into the mold at a height greater than the level of the lower layer in order to prevent its contact with the lower layer. The gasket prevents the finishing layer from penetration by the working compound and provides a uniform and high-quality front surface of the panels. After forming the upper layer, the gasket is removed.

As an example ; prepared the following mixtures.

For latex cement concrete, kg; Portland cement 400 - 32, granite rubble 78, piesok 64, latex SKS-65 grade B 8, water 4, chromium oxide 2, O.K. 9 cm

For epoxy coating solution, kg; ED-5 I, TEG-1 2, PEPA 1,5, quartz sand 35.

In the second place, kg: portland Na 4OO-5O, 121 tebze, sand O4, yes yes, 20, O.K. 4 cm

The latex mixture was placed in the bottom of the plate (9 cm, then 2 cm long, vibrated, then a metal ball was inserted parallel to the bottom of the mold (through the perforated wall; wall) and a metal fins were placed on it.

a layer of concrete concrete, vibrated, after which the ykt was pushed out. Similarly to a mold with a bottom finishing layer with epoxy polymer (3 mm diameter tires). After the forms of ovaya, the plates were steamed at U SO C, but in the mode: 4 + S-f44 Ready-made wafer hollow boards;

An external inspection of the plates showed that the plates had a smooth, uniform surface finish. When forming a two-layer

4aiaf. Of these compositions without laying of sheet material on the front surface of the surface of the slabs, especially with epoxy finishing layer, there were inclusions of regular concrete, a substantially worse decorative appearance of the slabs.

Claims (1)

Invention Formula The method of combining two-layer lay-down panels downwards, including layer-by-layer forming of the lower and right layers, characterized in that, in order to improve the quality of the products, a sheet is laid on the molded lower layer, which is removed after the upper layer is formed.