SU1611546A1 - Apparatus for recovery of moulding sands - Google Patents

Abstract

The invention relates to foundry, in particular, to the regeneration of waste molding sands. The purpose of the invention is to increase the efficiency of the multi-stage rubbing of the binder by returning its productive part to production. The processed molding mixture is fed into the device through the feeder 1. The cones 5 with the drive shaft 4 rotate. When a mixture hits them, it accelerates and throws onto the reflectors 15. As a result of the blow, sand grains are cleaned from a film of binding material. Then, along the drain 9, the material is fed to the blocks of the inclined rods 10, where it is sprayed onto separate flying particles, and the wiped off films of the binder by exhaust ventilation after each block of rods 10 are removed into the cyclone 16. At each subsequent step, the process is repeated. The speeds of rotation of the cones 5 are different, therefore, the speeds of acceleration and particle methane are different. In the first and last stages of abrading, the inert part of the binder is released, and in the intermediate stages, its active part. 2 Il.

Description

; The invention relates to foundry production, in particular, to the regeneration of processed molding sands.

I The purpose of the invention is to increase the efficiency of multi-stage rubbing of a binder by returning it to production.

(productive part.

 FIG. 1 and 2 show the design of a device for the recovery of foundry

sands.

The device consists of a feeder 1, blocks 2, which include walls 3, a central shaft 4 with cones 5 fixed to shaft 4 with an external gear ring 6, gears 7 with a fixed axis and an internal gear ring 8, leaks 9, blocks inclined rods 10, chutes 11, ring receivers 12 and 13; The 4 adjacent blocks are connected by couplings 14. In the place where the rods are attached, there are holes for exhaust ventilation. | On the walls 3 are fixed annular reflectors (15. The device is equipped with cyclo- | 16.

i The device works as follows. The processed molding mixture is fed into the device through the feeder 1. Heads; 5 with the drive shaft 4 are rotated. : When a mixture hits them, it accelerates and throws onto the reflectors 15. i As a result of the impact, the sand grains are cleared from the film bonding its material. Then, along the flow 9, the material is fed I to the blocks of the inclined rods 10, where it is sprayed into separate flying particles and,; wiped off films of exhaust ventilator:: after each block of rods 10

removed to cyclone 16. The speeds of rotation of the cones 5 are different. As a result, the rates of acceleration and metane particles are different.

: The difference in rotational speed is as follows: with a gear 6-8;

at each stage the gear has a gear

various gear ratios. For example

When using a regenerator with four or six steps, gear ratios are selected in the following proportions: .5,, 2,, 8, where i is the gear ratio of the lower stage. The speed of the throwing of sand grains reaches at the corresponding steps x: 32, 21, 15, 11 m / s. The active part of the binder is isolated on the second and third stages, and the inertial ones - on the first and last.

Separate scrubbing and withdrawal of a portion of the binder from the regenerator that has been removed allows the binder to be divided into active for re-use and inert, lost to binder, portions. This separation of the binder allows you to select the active part and return it to production. As a result, it is possible to reduce the consumption of bonded materials in the preparation of molding sand, and also due to the additional effect to reduce the cost of suitable products of processing, increase the competitiveness of regeneration processes and facilitate the task of their implementation.

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Claims (1)

Invention Formula A device for the regeneration of casting sands, comprising a housing, reflective rings, a shaft with accelerator cones mounted for rotation and mounted in a cascade in height, estrus, inclined cantilever rods and ventilation holes, characterized in that, in order to increase the efficiency of multi-stage scrubbing the binder by returning its active part to production, it is equipped in each section of the cascade with gears of rotation of accelerator cones with a consistent decrease in their transmission ratio worn from shaft to cone accelerator m attrition at each subsequent stage. Compiled by O. Belkov Tehred A. KravchukKorrektor O. Tsnple Circulation 618 Subscription eight Phage.2