SU897527A1 - Apparatus for producing large-size articles from powder materials - Google Patents

Description

one

The invention relates to the manufacture of building products, mainly panels, blocks, slabs, and other elements.

Closest to the proposed technical solution is a device for the manufacture of large-sized articles from powder materials, comprising a central chamber with an outlet nozzle and an additional chamber 1.

The disadvantage of this device is that the confusedly disposed nozzle ensures that only a thin layer of the coating is applied to certain surfaces. When using this device for the manufacture of large products, it is impossible to achieve the required quality, since as the nozzle moves across the surface, crystallization in the layer instantly forms and the return of the nozzle to build-up the product inevitably crystallizes the surface layer.

This will lead to loosening and delamination of the product and, consequently, to a decrease in quality.

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

This goal is achieved by the fact that in a device for the manufacture of large-sized articles from powder materials, comprising a central chamber with an outlet nozzle

10 and an additional chamber, the output nozzle of the central chamber is made in the form of a flat diffuser and is located in an additional chamber, the additional chamber being coaxial with the central chamber and with a gap relative to the diffuser, and the central chamber is equipped with fuel nozzles installed in the gap.

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Fig. 1 shows a proposed apparatus for the manufacture of large-sized articles from powdered materials; figure 2 - section aa in figure 1.

A device for manufacturing large-sized articles from powdered materials comprises a central chamber 1 with an outlet nozzle 2 in the form of a flat diffuser, an additional chamber 3i mounted coaxially with the central chamber and with a gap relative to the diffuser, and nozzles k fixed to the central chamber 1. The central chamber 1 is made with holes 5 for the ejection of the air flow and is connected to the discharge pipe 6. For transporting the molded product 7, a roller table 8 is provided.

The device works as follows.

The fuel and powdered material is fed through the tube 6 into the central chamber 1, where combustion is maintained by a stream of air coming from the openings 5. The softened mass under the action of pressure in the pipe 6 is injected through the nozzle 2 into the additional chamber 3. Under the action of the burning fuel coming from nozzle 4, the softened mass is melted and applied to the end of product 7, where instant sintering of the particles takes place, ensuring crystal

lizization throughout the thickness. As the product grows, the latter is moved over the conveyor 8 to the cooling room. The uniform structural formation of the ceramic product is achieved by the granulometric selection of the grain composition of the mixture.

Claims (1)

1. Device for manufacturing. large-sized articles made of powdered materials, comprising a central chamber with an outlet nozzle and an additional chamber, characterized in that, in order to improve the quality of the products, the outlet nozzle of the central chamber is made in the form of a flat diffuser and is located in an additional chamber, the additional chamber being coaxial with the central chamber and with a gap relative to the diffuser, and the central chamber is provided with nozzles installed in the gap to supply fuel to the secondary chamber. Sources of information taken into account in the examination one . USSR Author's Certificate No. 569330, cl. B 05 B 7/20, 1977. J