SU980924A1 - Vibration unit for regeneration of moulding mixtures - Google Patents

Description

The invention relates to foundry, in particular, to devices for the regeneration of sand.

Known vibration device for the regeneration of the molding mixture

tl.

The disadvantage of this installation is that in the process of destruction of the molding sand particles of sand accumulate in the working chamber, which significantly reduces the intensity of abrasion of the molding sand, and consequently, the productivity of the installation.

Closest to the invention to the technical essence and the achieved result is an installation for the regeneration of molding sand, the working chamber of which is made in the form of two containers, between adjacent side walls of which additional weight is installed, and vibration exciters are installed along the outer side walls of containers 2.

This arrangement of the installation provides dynamic synchronization (self-synchronization) of vibration exciters and the trajectory is identical at all points of the working chamber, which allows

significantly intensify the process of regeneration of the molding mixture.

However, a significant disadvantage of this installation is that the additional load constitutes about 36% of the oscillating part of the installation, which necessitates the use of much more effective vibration exciters.

ten

The aim of the invention is to improve the regeneration by maintaining the condition of obtaining an identical trajectory at all points of the working chamber and

15 weight reduction of the oscillating part of the installation.

The goal is achieved by the fact that a vibratory installation for the regeneration of a molding sand mixture, containing a resiliently suspended two-container working chamber with inclined bottom sections, the vibration exciters are additionally installed along the outer side walls.

25 exciters installed in the central part of each of the containers of the working chamber, while (the PLANE of the axes of rotation of all the exciters passes through the cent

Claims (2)

30 tons of tin of the oscillating part of the installation. FIG. 1 shows a schematic installation, cross-section; FIG. 2 is a section A-A in FIG. 1. The vibration unit for the regeneration of the molding mixture consists of a two-container working chamber 1, installed with the aid of elastic weights 2 on a fixed base. Along the outer side walls of the containers of the working chamber 1, vibration exciters 3 are connected, which are connected by means of elastic couplings 4 with the engines 5. In the lower part of each of the containers of the working chamber, there are sieves 6 and inclined chutes 7 with nozzles 8. The cavities of the containers of the working chamber are connected by a window 9 and a vertical chute 10. To supply the molding sand 11, a feeder 12 is located at one of the side walls of the working measure. connected by one end with the help of a hinge 13 with the wall of the working chamber, and the other with the help of an inclined spring 14 with a fixed base. A tray 15 is located under the cuttings 8. A probe 16 is located above the working chamber. It is connected to the working chamber by means of elastic elements 17. Inside each of the containers of the working chamber additional vibrating exciters 19 are located in the pipe 18 and are connected by means of elastic couplings 20 with motors 21. Installation for the regeneration of the molding mixture works as follows. Engines 5 and 21 are switched on, which, through couplings 4 and 20, communicate vibration exciters 3 and 19, while the direction of rotation of all vibration exciters is identical. In the process of temporary exciters, the additional exciters 19 rotate in antiphase with respect to the exciters 3, providing them with a common-mode and synchronous rotation. Due to reliable self-synchronization, the amplitude of oscillations along a circular path is provided in all points of the working chamber. The mold mixture 11 placed in the hopper 12 is continuously fed into the working chamber and under the action of vibration spreads along the chamber. Under the action of vibration, the molding material is partially broken and, through the b sieve, sand is sifted onto the inclined chute 7 and, moving through it, is poured out onto the chute 15 through the nipple. Since the molding mixture is continuously fed into the working chamber, at the left end steak an excess of molding sand is created, which, under the action of vibration, tends to be evenly distributed along the working chamber. Due to the fact that the pressure of the molding mixture during the process of its vibration on the walls is different (the pressure on the right side walls is greater than on the left; until it reaches the opposite end wall, the molding mixture flows through the window 9 into the right container of the working chamber) vibrations are finally not destroyed with the molding mixture along the vertical chute 10 and are poured into the left container of the working chamber. Thus, the molding mixture is continuously circulated Spiral trajectory (Fig. 2) is intensively rubbed. The wear products of the molding mixture are continuously removed through a sieve 6 from the inner cavity of the working chamber, thereby ensuring intensive mixing and, consequently, abrasion of the molding mixture. cleaning, thus protecting the environment from dusting. Such a constructive solution of the installation allows to significantly reduce the mass of its oscillating part, reduce the drive power and increase its durability. the awn Claims of the invention A vibratory installation for the regeneration of a moldable mixture containing an elastic-suspended two-container working chamber with inclined bottom sections in which vibration exciters are installed along the outer side walls, in order to improve the regeneration of the molding mixture by maintaining the condition of obtaining an identical trajectory at all points working chamber and reducing the mass of the oscillating part of the installation, it is additionally equipped with vibration exciters installed in the central part of each th from the working chamber container, wherein the plane of the axes of rotation of all passes through the cent vibroexciters severity koleblk Zeiss Fitting. Sources of information taken into account in the examination 1. UK Patent No. 1451303, cl. In 22 5/00, published. 1976. 2. USSR author's certificate for application No. 2954945 / 22-02, cl. B 22 C 5/00, 1980. f2 15 nineteen