RU1770027C - Device for filling metering volume with forming mixture - Google Patents

Abstract

Usage: in metallurgy at filling. the use of measured containers of the molding sand to increase the uniform distribution of the molding sand. The device contains a distribution hopper, conveyor, dividers. New to the device is that. that the distribution hopper is made in the form of a drive swinging bell, inside of which profiled dividers having a crescent shape are installed. 2 ill.

Description

The invention relates to foundry, in particular to devices for filling measuring containers with molding sand.

A device for dispensing a mixture into a flask is known, including a feed hopper, a metering hopper with a divider and a shutter installed at the outlet and a sieve located between the feed and metering hoppers, which is provided with vertical partitions installed perpendicular to the direction of movement of the shutter (1) ,

A drawback of this device is a drawback common to all gate valves — the uneven filling of the container in the direction of movement of the shutter. The performance of the device depends on the size of the sieve, humidity and viscosity of the mixture.

A device for filling the flasks with molding sand is also known, including a feed hopper, a metering hopper and an inclined chute, equipped with an impeller and an axis of rotation parallel to the direction of flow of the moldable mixture along the chute, at the bottom of which slides with an adjustable angle of inclination and dividers are fixed stepwise relative to each other ( 2).

The disadvantage of this device is the duration and complexity of its adjustment for the distribution of the jets, which depends on the composition, humidity and viscosity of the mixture, as well as the significant dimensions of the device.

The closest solution selected as a prototype is a device for feeding the molding earth into the mold flask, comprising distributors with a certain number of separate and other plates for dividing the earth flow into several streams, the second distributor being under the first and the third under the second and have the shape of a pointed cap (3).

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The disadvantages of this device include discreteness of flows and, as a consequence, a violation of the uniformity of land flow into the flask - the alternation of hills and depressions, because The separation of the earth stream is different in density, the amount of land is determined by the shape and size of the cross section of the stream coming from the conveyor.

The purpose of the invention is to increase the uniformity of distribution of the molding sand.

In FIG. 1 shows the device, cut; figure 2 is a cross-section aa-on figure 1.

The device comprises a feed hopper 1, a conveyor 2, a distribution bell 3 with a set of dividers 4, a mechanism for converting rotational motion into oscillatory 5, an electric motor b, a measuring tank 7. In the process, the molding mixture flows from the hopper 1 through the conveyor 2 into the bell 3, which captures the flow of the mixture and forms it in the form of a continuous tape with a uniformly distributed mass of the mixture across the width.

The device for filling the measuring container with the molding mixture is made in such a way that the area and dimensions of the inlet section of the socket provide a capture of the incoming flow of the molding mixture and the flow rate and volumetric flow rate of the conveyor mixture are selected. The outlet cross-sectional area of the bell determines the width and thickness of the outgoing strip of the molding sand. The cross-sectional dimensions are selected based on the volumetric flow rate, the width of the measuring tank 7. To reduce the resistance to movement of the mixture along the socket and to change the direction of flow of the upper and lower walls of the socket, circular arcs are applied with a low friction coefficient and low molding adhesion along the inner surface of the material mixtures, for example rubber.

To form a tape with a uniformly distributed mass across the width, the bell is equipped with a set of dividers made in the form of profiled plates arranged in a checkerboard pattern (Fig. 2).

With continuous swinging of the bell, the measuring tank is filled completely with the molding sand, the length of the layer is determined by the amplitude of the oscillation of the bell and the size of the tank, the thickness is determined by the frequency of oscillations and

speed of the incoming flow of the molding sand into the bell.

The use of a swinging bell with profiled dividers improves the uniformity of filling.

measuring capacity, which in turn will provide high quality castings.

Claims (1)

SUMMARY OF THE INVENTION A device for filling a measuring container with a molding mixture, comprising a conveyor, a distribution hopper and profiled dividers arranged in several rows inside it to form the flows of the molding mixture, characterized in that, in order to increase the uniformity of the distribution of the molding mixture, the distribution hopper is secured with the ability to swing in a vertical plane with adjustable amplitude from the drive, profiled dividers in rows placed in a checkerboard pattern, while in the upper row, the profiled divider has one central wedge of a visible shape, and in the rest r dah - shaped sickle-shaped dividers, shapes.