SU1289584A1 - Apparatus for regeneration of moulding sand - Google Patents

Abstract

The invention relates to foundry, in particular, to methods and devices for the regeneration of molding sands. The purpose of the invention is to increase productivity by eliminating the manual operation of cleaning the grate. When air is supplied through the collectors 19 to the grill 15 in the boiling chamber 2, a fluidized bed is formed, in ffe f77i / J7f UfO 8 I W 13Z5 H Flfej g /. JX о / т Т ffeMTTtf / rro / yaL, Z7 ffcfS .S

Description

which is the separation of metal particles, pieces, rods, frames, etc. The cleaned sand flows through the threshold of the boiling chamber 2 into the discharge chute 3. The individual pieces of the mixture, the metal, fall through the gaps of the grill 15 and the belt conveyor 27 are removed to the outside. At.

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The invention relates to foundry, in particular, to methods and devices for the processing of waste molding sands.

The purpose of the invention is to increase productivity by eliminating the manual operation of cleaning the grate.

FIG. 1 shows the device, a general view; in fig. 2 shows section A-A in FIG. one; on. 3 shows a section BB in FIG. 2; in fig. 4 - a fragment of the tube sheet and air manifold.

The device comprises a hopper 1 mounted on the upper flange of the boiling chamber 2, and the chute 3 of the regenerate is attached to the side wall of the chamber. In the upper part, inside the chamber, there is a gate A, fixed on the axis 5, mounted in the chamber 2 with the possibility of rotation, on one of the ends of the axis 5, the lever 6 is rigidly fixed, pivotally connected to the fork 7 of the pneumatic cylinder 8, mounted on the bracket 9. The parts have a flange 10 and a half of the bearing housing 11. The flange 10 is bolted through a sealing gasket 12, the housing 13 of the lower part of the boiling chamber 2 with the second half of the bearing housing 14. Inside the boiling chamber 2 there is a grille 15 consisting of two transverse and lny pipes (the minimum quantity of longitudinal pipes - three). To prevent clogging of the pipes and to allow air to escape, the openings are located underneath, and angles 16 are welded to the pipes to change the direction of air flow. Two hollow 17 are connected to the transverse pipes of the grille, which communicate with the grille. Axles 17 are installed with

driving the grill into 15 pieces (which deteriorates boiling conditions), the grill is rotated around an axis located in the studs 17, the strikers 29 enter the gap between the tubes of the grill 15 and clean it. At this time, the mixture flows directly into the discharge chute 3. 4 sludge.

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rotatably in bearings 18 housed in the halves of bearing housings 11 and 14. Outside, pins 17 are fitted with two annular air supply manifolds 19, rigidly attached to chamber 2 and casing 13. Outside, also covers 20, 21 of annular manifolds with seals 22 The ends of the hollow trunnions 17 are closed by covers 23, a lever 24 attached to the plug 7 of the pneumatic cylinder 8 is attached to one of them. A tee 25 is attached to the flanges of the collectors 19 to supply air to the boiling chamber. Through holes 26 are made in the side surfaces of the trunnions 17 with a total area equal to the cross-sectional area. A belt conveyor 27 for cleaning waste from the boiling chamber is attached to the lower flange of the housing 13. The gaps between the belt conveyor 27 and the walls of the housing 13 are sealed with rubber gaskets 28. The regenerate exit window is made in the chamber 2 of the upper flange for some distance to form a threshold through which the boiling layer of the purified mixture flows. The tee 25 is attached to the bracket of the housing 13. Inside the housing 13 is made of bump stops 29.

The device works as follows.

The molding mixture is fed into the hopper 1, from which it enters the boiling chamber 2 and the gate 4 is guided to the grid 15, which is in the working position horizontally. Air is supplied to the collectors 19 through the holes 26 of the trunnions 17 enters the grid 15. The molding mixture above the grid 15 of the boiling chamber 2 when air passes through it is brought into suspension, flows through the threshold into the window of the chamber 2 and the chute 3. Scrap, pieces of rods and others, having a large specific gravity, fall through the gaps between the tubes of the grate 15, fill the body 13 of the boiling chamber 2 and the belt conveyor 27 are thrown into the waste system. In order to periodically clean the tubular lattice from large pieces of molding sand or rods falling on it, and scrap include an air cylinder 8, which with the help of a fork 7 rotates the arms 6 and 24 and the axis 5 and the gate 4 connected with them, as well as the lattice 15 with pins 17 a position in which the molding mixture enters directly into the chute 3, and the accumulated waste is discharged from the grill 15, with pieces stuck between the pipes being pushed out by baffles 29 welded to the side surface of the body 13 and placed a device at a distance equal to the lattice pitch in the direction perpendicular to the axis; a device for regenerating molding sand; containing a hopper, a boiling chamber with a lattice made of communicating tubular elements, a gate connected with an axis and a lever with a pneumatic cylinder, an air supply manifold, a valve A torus waste bin and belt conveyor under it, characterized in that, in order to increase productivity by eliminating the manual operation of cleaning the grate, it is provided with baffle plates and a grate turning assembly, ennym as hollow

that lattice, i.e. so that

by turning the lattice 15 they enter into

annular space. Waste of 30 perforated axles mounted

with TC belt conveyor 27, after inside the air supply manifolds.

what works pneumatic cylinder 8 and returns the gate 4 and the tube sheet 15 to its original position.

Thus, in the proposed device, due to the self-cleaning grid, the downtime required for manual cleaning of the boiling chamber is increased, the production of a lever connecting one of the trunnions to the pneumatic cylinder is increased, while the bump stops are located on the inner side J5 wall of the boiling chamber under the grille at a distance from each other. other than the height of the chamber equal to the lattice pitch in the direction perpendicular to the axis of rotation of the lattice.

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no need for manual labor. The device can be installed in systems without prior screening of the used sand. The boiling chamber is sealed, without additional windows for cleaning and maintenance, which improves sanitary and hygienic working conditions. The horizontal connector of the boiling chamber allows to reduce the time for installation work and repairs.

Claims (1)

Invention Formula A device for regenerating the molding mixture, comprising a feed hopper, a boiling chamber with a grill, made of communicating tubular elements, a gate associated with an axis and a lever with a pneumatic cylinder, an air supply manifold, a fan, a waste bin and a belt conveyor under it, characterized in that , in order to increase productivity by eliminating the manual operation of cleaning the grate, it is equipped with bump stops and a grid turning unit, made in the form of hollow and a lever connecting one of the trunnions with the pneumatic cylinder, while the bump stops are placed on the inner side wall of the boiling chamber under the grill, spaced from each other along the height of the chamber equal to the lattice pitch in the direction perpendicular to the axis of the lattice rotation.  L 7 Y / y / S 8fHmu / iK4uM I Omnodui Regenerate 22 "K Sf f 22 21 18 15 Compiled by O. Belkov Editor N. Slobod nickname Tehred V. Kadar Proofreader A. Tsko Order 7846/10 Circulation 763 VNIIPI USSR State Committee for inventions and discoveries 113Q35, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 ig Subscription