SU885031A1 - Device for moulding and thermal treatment of articles with bas-relief design device for delivering and stacking articles - Google Patents

Description

(54) DEVICE FOR FORMING AND HEAT TREATMENT OF PRODUCTS WITH RELIEF PICTURE

 I.

The invention relates to the manufacture of building materials and may be non-. used in the molding of concrete, reinforced concrete, plaster, plastic and similar mixtures in the shops and at the landfills of concrete products plants.

Known forms for the manufacture of products with embossed pattern, made with a matrix made up of bulk elements. Each side of the element has a relief pattern. The element itself is made of polymeric materials, made up of a base and a removable set-up with a pattern filled with heat-conducting materials, for example, a mixture of graphite with aluminum powder. To facilitate the expansion between the matrix, a diaphragm of polymer film {and 2 is positioned to the moldable mass.

A disadvantage of the known forms is that it is possible to adjust the heat treatment of the product and, thus, reduce its quality. as well as high energy costs during heat treatment of molded products in heat chambers.

The purpose of the invention is the reduction of energy consumption and heat treatment time, as well as the provision of various capacities of heat:

dividing in different parts of the form and preventing the connection of the bulk shape elements into a random electrical circuit.

This goal is achieved by the fact that in a device that includes a pallet, beads and a matrix with a relief pattern, made inlaid from three-dimensional elements consisting of mastered and removable overlays with a pattern, each volume element of the matrix is made with a conductive plug on each face with removable conductive These plates are filled with conductive heating material, the volume elements of the matrix are made with different ohmic resistance values of the conductive mixture.

Conductive plugs are located

15 on the volume elements so that their coordinates are not repeated on any of the faces, which prevents the connection of the volume form elements into a random electrical circuit.

FIG. Figure 1 shows the structure of the proposed device; in fig. 2 - a variant of the scheme. connecting volumetric elements to an electrical circuit and connecting the matrix to the electrical network (the dot-and-dash line shows the path of the electric current); in fig. 3 - volume element (cube with a pattern).

The device includes a metal formwork consisting of a pallet 1 and sides 2. On the pallet 1 a composite matrix is installed consisting of volume elements 3. An electrically conductive plug 4 is made on each edge of the volume element 3. On several, for example, two faces of the volume element 3, elastic conductive plates 5 are fastened through which electrical contact is made between adjacent volume elements.

The volume element 3 is filled with a mixture of 6 graphite powder with quartz sand. Depending on the type and configuration of the molded product, as well as the material from which it is made, the ratio of the components of the filler mixture can be changed, which provides a predetermined value of ohmic resistance and thereby the required power of heat release in different parts of the form.

The matrix is covered with a film 7, which seals the device and imparts anti-adhesive properties to the matrix surface.

A sheet of electrically insulating material, for example, glass-reinforced plastic, which also has good thermal insulation properties, is placed under the matrix under the matrix, which reduces the thermal deformation of the metal pallet.

After the product has been molded, for heat treatment, the electrical wires are connected to special conductive sections 8 insulated from the metal structure of the device and the matrix is connected to a source of electrical energy.

The electric current flowing through the mixture filling the elements of the matrix heats it due to the ohmic heat release. The heat treatment process can be regulated, for example, by varying the voltage of the source of electrical energy according to a given program.

Software regulation of the heat treatment process of the molded product

and providing different power of heat generation in any parts of the matrix allows to optimize heat treatment, which improves the quality of the product, reduces the duration of the heat treatment process. Optimization of heat treatment and reduction of heat loss by additional thermal insulation of the metal form from the heat-generating materials of the bulk of the matrix by a sheet of fiberglass reduces the cost of energy for heat treatment.

Claims (2)

1. A device for forming and heat treating products with a relief pattern, including a pallet, sides and a matrix with a relief pattern, made inlaid from three-dimensional elements consisting of a base and removable patterned sheet, characterized in that, in order to improve the quality of the products, reduce the cost of energy and the duration of heat treatment, each volume element of the matrix is made with a conductive plug on each face, filled with a conductive heating material and has removable conductive elastic pads fixed to several non-contiguous the concrete of the face of the element, moreover, the elements of the matrix are adapted to adjust the ohmic resistance of the conductive heating material. 2. The device according to claim 1, characterized in that, in order to prevent the connection of the bulk elements of the matrix into a random electrical circuit, the conductive plugs are arranged so that their coordinates are not repeated on any of the faces, but on the surface of the plugs themselves on adjacent faces x contiguous bulk elements do not overlap. Sources of information taken into account in the examination 1. USSR author's certificate number 435112, cl. B 28 B 11/00, 1974. 2. USSR author's certificate number 653114. class. B 28 B 11/10, 1979. HbJtHt-HiyhdtL. / zH   PI -JL3 / 1. network I ii. I lggsh - - h 1EEEEHSH 0-