SU1458060A1 - Apparatus for processing the moulding sands - Google Patents

Abstract

The invention relates to foundry production, in particular, to a technology for the classification of molding sands and sands. The purpose of the invention is to improve the quality of the processed mixtures. The goal is to provide a device for processing molding mixtures containing a shaft with inclined crossing elements, fixed with ruees on its walls, with inserts placed in the center of the mine under each light of the transfer of elements embedded in the form of blocks of cantilever rods. The inserts are also made in the form of blocks radially oriented from the center with cantilever rods tilted down. The invention allows the preliminary classification of waste molding sands and improves their granulometrical composition. 1 hp ff, 4 ill. S S C /)

Description

one

FIELD OF THE INVENTION The invention relates to foundry production, in particular, to the technology for the classification of molding sands and sands.

The purpose of the invention is to improve the quality of recyclable CMeceii.

Figure 1 shows the proposed device, side view; figure 2 is a view of And figure 1; on fig.Z and 4 - view B in figure 1.

The device consists of a shaft 1 with interchangeable elements 2, made in the form of cantilever rods 3 and central inserts 4, made similarly, the rods 3 are oriented radially. There are also a loading eicHo 5 and a discharge opening 6 of the shaft. Air blowing from the fan (not shown) is carried out upwards.

The device works as follows.

The spent molding mixture is fed into shaft 1 through window 5. As the mixture passes through the blocks of rods 3, the particles hit the rods 3, bounce off at different angles and collide with each other and falling particles. The number of collisions. is increased by the presence of inserts 4 and exposure to air, which creates a mixing effect. When particles collide, the binder from the surface of the grains is cleaved, captured by the air flow and removed from the working chamber along with other dust-like particles. Thanks to the fact that the rods in the adjacent sections have an opposite inclination, the mixture flow moves along a zigzag trajectory

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that improves its cleaning from dust by shoveling the mixture.

A block of rods 3 mounted on the central insert is shown in FIG. 2. The rods 3 are directed along the radius of the camera. The block of rods 3, fixed around the circumference of the chamber 1, is shown in FIG. 4. It also shows rods directed along the radius, with the aim of creating a more dense network of obstacles against the body and removing the mixture from the chamber walls. On fig.Z shows rods mounted in the chamber along the chord. In this case, the mixture along with the zigzag trajectory additionally receives an offset along the helix, which also contributes to the mixing of the flow layers and, consequently, the blowing of dust.20

Compared with the known technical solutions, making transferring elements from blocks of rods improves the smoothing of sand grains binding to the surface. With the proposed 25 design of the moving elements, it is possible to mine a round section shaft, which will improve gas flow.

separation chamber by eliminating stagnant corners of the rectangular separation chamber.

Invention Formula

Claims (2)

1. A device for processing forging mixtures containing a mine with loading and unloading openings and inclined pouring elements fixed with russes on the wall of the mine, in order to improve the quality of the worked mixtures, it is provided with inserts placed in the center of the mine under each of the layers of the pouring elements, while the pouring elements and inserts are made in the form of blocks of cantilever rods, the latter are radially oriented from the prices of free ends with the slope 2. The device in accordance with claim 1, 1, which is elicited by the fact that the console rods of the pouring elements are oriented radially or along the chord of the mine section. Invention Formula 1. A device for processing molding sand containing a shaft with loading and unloading openings and inclined pouring elements fixed with rus on the walls of the shaft, characterized in that, in order to improve the quality of the processed mixture, it is provided with inserts placed in the center of the shaft under each of the Russes of pouring elements, while pouring elements and inserts made in the form of blocks of cantilever rods, the latter are radially oriented from the center with free ends with a downward slope 2. The device in accordance with claim 1, 1, which is elicited by the fact that the console rods of the pouring elements are oriented radially or along the chord of the mine section. fuS.i Vida FIG. 2 Buds Fi.Z View 6