SU986577A1 - Unit for regeneration of moulding mixture - Google Patents

Description

(54) INSTALLATION FOR FORMING REGENERATION

 MIXTURES

The invention relates to the field of foundry, in particular, to devices for the regeneration of sand. A known apparatus for the regeneration of a moldable mixture, comprising a vibrating working chamber with an inclined bottom Cl. The closest to the invention in technical essence and the achieved result is a plant for regenerating molding sand, including a working chamber, a rotating unker with a blade, for cleaning sand surface, dust collectors, vibrators and two cleaning tanks C2. The disadvantage of these installations is their low productivity, due to the insufficient intensity of destruction of the bonding materials. The aim of the invention is to improve the regeneration process by conveying rotational-oscillating motion to the booklet. The goal is achieved by the fact that in an installation for the regeneration of a molding mixture containing a rotating hopper with blades and vibration locomotives, the latter is equipped with a drum mounted on elastic hangers with spring-loaded arms with rollers and ring guides mounted on the ends of the bunker, which is designed as perforated tube and mounted coaxially in the drum on spring-loaded levers with rollers in contact with the ring guides on the ends of the bunker, while the drum is provided with passing Either of its outer side walls are vibration exciters, the axes of rotation of which are in the plane passing through de fractions of the oscillating system. . . FIG. 1 shows a longitudinal section of the installation; in fig. 2 is a section A-A in FIG. 1. Installation for the regeneration of the molding mixture contains a perforated bun

core 1 with annular guides 2, installed on the drum 3 by means of levers 4 with rollers 5. Step 4 is spring-loaded springs 6. In the lower part, drum 3 is equipped with an inclined bottom 7 with a branch pipe 8, a probe 9 is mounted above the drum, connected to the drum with the help of elastic elements 10. The drum with the help of elastic suspensions 11 is mounted on a fixed base. Vibrating drivers 18 are installed along the outer side walls of the drum. The annular guides are equipped with sealing elements 13. A loading tray 15 is installed to supply the molding mixture 14 at the right end wall of the drum. A discharge tray is installed to remove indestructible objects 16 from the inner cavity of the hopper near the left end wall of the drum. 17. At the left end wall of the bunker are the blades 18. Under the installation is located the conveyor 19.

The installation works as follows.

The drum 3 is driven into oscillatory motion along a circular trajectory in a vertical plane by vibration exciters 12. Bunker 1 performs a rotational-oscillatory motion due to the contact of the rollers 5 on the spring-loaded levers 4 along the annular guides 2, while the bunker oscillates in antiphase with respect to the outer drum 3 and rotates in the opposite direction to the rotation of the vibration exciters 12. A mold 15 is continuously fed into the internal cavity of the hopper. Under the action of vibration and rotation of the perforated On the bunker 1, the molding mixture is destroyed and sifted onto an inclined bottom 7, moving through it through the nozzle 8 and out onto the conveyor 19. Under the influence of vibration, the molding mixture spreads along the rotating bin. Unbroken pieces of the mixture and foreign materials pick up the blades 18 and transfer them to the discharge chute 17, thus freeing the working cavity of the bunker from indestructible materials.

Such an embodiment of the installation allows to significantly intensify the process of restoring the molding mixture and increase its productivity.

Claims (2)

1. US Patent No. 4О25419, cl. On 24 May 31/06, 1977. 2. Japanese Patent No. 53-2045О, class B 22 C 5 / GS, 1978.