SU733861A1 - Electric furnace for article sintering - Google Patents

Description

I

The invention relates to powder metallurgy, in particular, to electric furnaces with a protective gaseous medium for sintering and heat treatment of products and can be used in electric machines: welding, the metallurgical and metalworking industries.

A famous furnace for sintering products, containing a passage muffle and a chamber with heating elements, is made with a swinging mechanism, while under the furnace it is equipped with guides, the longitudinal edges of which form channels for moving articles along the chamber

P.

The disadvantages of the furnace are that: in the furnace, it is possible to sinter products of only a cylindrical shape, in addition, during transportation of the product, they can be destroyed.

Also known is an electric furnace for sintering products, including heating and cooling chambers, heating

The muffle with the product containers and the loading and unloading chamber 2. Inside the muffle is placed a device for heating the protective gas in the form of a coil, and the screen is installed between the heating and cooling chambers. The coil is mounted in a heating chamber above containers with heals pushed along the muffle. The containers slide along the bottom of the muffle, and the container next to the train is pulled out of the cooling chamber.

Known stove in its closest to the proposed technical essence and the achieved effect.

However, in the known furnace it was not possible to avoid the contact of the containers with the muffle bottom and the gas flow around the cage, the heating of the products is insufficient here, which affects the quality of the products being sintered.

Claims (2)

The aim of the present invention is to improve the heating uniformity of the iselia and to stabilize the thermal mode of the electric furnace. The goal is achieved by the fact that the furnace is equipped with a two-arm lever, a thrust and a spring-loaded cup installed outside the working space of the penalty, the muffle is equipped with longitudinal loops connected by arcuate struts the containers are provided with side bars and are mounted concentric with the muffle. FIG. 1 - a general view of the electric furnace; in fig. 2 - section A-A of FIG. one; in fig. 3 - section bb FIG. 1. The electric furnace contains a heating chamber 1, in which a muffle 2 is installed, one end of which forms, due to heat to the sending ribs 3, the cooling chamber 4, the heating chamber 1 is joined to the loading chamber 5, and the cooling chamber 4 to the unloading chamber 6. Chamber 5 is equipped with a loading device 7, and chamber 6 is a discharging device 8 of transport containers 9. Both chambers contain safety valve 10. Also, pusher 11 of transport containers 9 is mounted on the chamber 5 through the furnace, and on the chamber 6 - the holding mechanism 12 composed; The movable muffle 2 is provided with longitudinal guides 18, interconnected by arcuate struts 19, and trash containers 9 are supported on longitudinal guides 18 with side bars 2O. The side walls of the containers are made in the form of open cylinders and are perforated, and the end walls form bevels, due to which the containers interact with the double-arm lever 14. The heating chamber 1 with the columns 21 rests on the frame 22, which houses the equipment for supplying heaters 23 and furnace drives. Along the edges of the frame 22, the brackets 24 are mounted, on which chambers 5 and 6 are mounted. The furnace is operated as follows. The transport containers O are alternately mounted on the loading device 7 and pushed through the chamber 5 by the Pusher 11 into the heating chamber 1. At the same time, the last container of the train located in the cooling chamber turns the double-arm lever 14 and slides into the discharge chamber 6, where it is installed on the discharge device 8, which, lowering, unloads the container from the furnace. Under the action of glasses 16, interacting with the springs 17, the double-arm lever 14 is set in the outgoing position. The cylindrical transport containers, supported by side bars on the longitudinal guides, are mounted concentrically to the muffle, which contributes to their uniform heating, and since the longitudinal guides and arcuate struts prevent neither longitudinal nor transverse recirculation of the gaseous medium, efficient flow around the perforated product containers and stabilization of the thermal regime of the furnace. The invention The electric furnace for sintering products, including heating and cooling chambers, heaters, a muffle with containers for products and a loading and unloading chamber, is different from the fact that, in order to increase the uniformity of heating and stabilize the thermal regime, the furnace is equipped with a double-arm lever, a soft and spring-loaded glass, installed outside the working space of the furnace, the muffle is provided with longitudinal guides connected by arcuate struts, and the containers are made in the form of perforated open centers Cylinders with beveled ends that interact with the lever, and the containers are equipped with side bars and are mounted concentric with the muffle. Sources of information taken into account during the examination 1. USSR author's certificate number 38b7O6, .kl. B 22 F 3/10, 1972. 2. USSR author's certificate number 518523, cl. From 21G 9 / OO, 197 Aa