SU1379069A1 - Apparatus for mechanical regeneration of waste mould and core sands - Google Patents

Abstract

The invention relates to a foundry industry, namely, to the regeneration of spent molding and core sands. The purpose of the invention is to intensify the regeneration processes. The mixture is fed by the feeder 3 to the rotating rotor 6 and under the action of centrifugal force fills the cavity of the rotor bowl 6, forming a conical layer of the mixture. Subsequent portions of the mixture, moving along this cone, are subjected to mutual friction and then collide against fixed rods 9 fixed to disk 7, the disk being detachable and rods displaced relative to each other in the radial direction, which makes it possible to intensify the process of cleaning the grains of sand. As the rods 9 wear, the disc 7 may move in a vertical direction. The grains of sand from the working chamber 1 are then poured into the aeration chamber 4, where on the obliquely mounted rods x 10 there is an additional loosening of the flow, which also contributes to the intensification of the process of regeneration and the removal of dust fractions through the opening 11.4z. L f-ly, 3 ill. g (L

Description

fut.t

The invention relates to foundry, in particular, to the regeneration of waste molding and core sands.

The purpose of the invention is to intensify the regeneration processes.

Figure 1 shows the device, a general view; Figure 2 shows a disc with rods, top view; FIG. 3 shows the location of the rods on the wall of the aeration chamber.

The device consists of a cylindrical working chamber 1 with a hole for ventilation 2 into which a hopper with a feeder 3 is inserted. Under the working chamber 1 a cylindrical aeration chamber 4 is mounted, in the center of which is mounted a shaft 5 with a cylindrical rotor 6. On the feeder 3 a disk 7 is fixed the possibility of vertical shuffling (along the feeder 3 with screws and nuts 8. The rods 9 are fixed on the disk, the cantilever oblique rods 10 are mounted on the inner surface of the aeration chamber 4, and there is a circular hole 11.

The disk 7 is mounted on a feeder 3 of a rectangular shape and is made of two half-rings connected by bolts 12. The rods 9 are fixed on the disk 7 around the radial direction and displaced relative to each other in the radial direction, and the rods 10 on the wall of the aeration chamber 4 - in a checkerboard pore dke.

The device works as follows.

When the mixture is supplied by the feeder 3 to the rotating rotor 6, it fills the bowl space adjacent to the vertical wall of the rotor 6 by centrifugal force, thereby forming a conical mixture layer protecting the cylindrical wall from abrasive wear. Subsequent portions of the mixture move along this cone, subjecting to mutual friction, and upon collision with fixed rods 9, the process of cleaning the sand grains is intensified. As the rods 9 are worn, they are lowered along with the disk 7. Acquiring a certain speed, the grains of sand fly out of the rotor 6 into the working

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chamber 1 and poured into the chamber of aeration, where on the rods x 10 the flow is loosened, which allows to intensify the process of blowing dust-like particles with air sucked through the hole 11.

The device allows to intensify the process of sand cleaning by 12–21%, and the depletion process, by 22–40%. The resulting regenerate can be used to replace fresh sand in suitable molding and core mixtures.

Claims (5)

1. A device for mechanical regeneration of spent molding and core mixtures containing a hopper with a feeder, located inside a cylindrical working chamber, a rotor placed on a drive shaft under the feeder, made in the form of a cylinder with a bottom and equipped with an internal shoulder, and aeration chamber, about so that, in order to intensify the regeneration process, it is equipped with a disc with rods mounted on the outer surface of the feeder with the possibility of vertical movement, as well as inclined rods, Replaced on the upper part of the inner surface of the chamber. 2. The device according to claim 1, characterized in that the disk is made detachable. 3. The device according to Claims 1 and 2, which are only in that the rods on the disk are arranged in concentric circles with their mutual displacement relative to each other in the radial direction. 4. A device according to claim 1, characterized in that the rods of the aeration chamber are offset from each other vertically. 5. The device according to PP.1 and 2, t - is characterized by the fact that the feeder in cross section is rectangular or triangular in shape. 12 10 of FIG. 2 - - srig.Z