SU1069924A1 - Apparatus for cooling moulding material - Google Patents

Abstract

COOLING DEVICE FORMING MATERIAL containing, body, bottom, cover, stopper and cooler located at the bottom. parts of the body, characterized in that, in order to increase productivity and reduce production space, it is provided with a hollow ring with a nozzle and strips located in the upper part of the body D1 connected through holes in the wall of the body with its cavity and In the hollow ring, the slats are installed tangentially to the hull between adjacent holes in the wall of the housing, and the cooler is designed as a tubular manifold with holes. s.

Description

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: I „. The invention relates to foundry, in particular to equipment for cooling the molding material in the manufacture of castings by vacuum molding.

A known hopper is provided with a housing for accumulating a dry molding material and having a conical shape. A pipe is connected to the bottom of the hopper to feed the molding material through it. from the hopper to the flask located on the forming table. After pouring and knocking out, the molding material from the flask enters the bunker, where it is stored until the next SI molding cycle.

 the hopper allows you to store a limited amount of molding material. The bunker is intended for servicing vacuum forming plants with a capacity of 5-10 molds per hour with a weight of the molded mold of no more than 2-3 tons. The molding material after knocking has a temperature not lower than 200 ° C. During molding, the temperature of the molding material should not exceed 40 ° C, otherwise the forming sealing film will burn through. Therefore, the sand in the bunker after chipping should cool to 40 ° C, which takes a long time. This significantly reduces the productivity of the molding plants. The increase in the stock of the molding material is not profitable economically and takes a lot of useful production area, which is undesirable in small foundries.

A continuous installation for cooling the casting mixtures with air is known, which consists of a tank equipped with slits for blowing air and a device for taking the mixture 2.

However, this installation does not contain a device for storing dry molding material. In addition, when stopping the selection of the molding material, the disc blades clog with cooled working material.

The installation has a complex structure due to the presence of a mechanical device for the selection of the mixture, which requires additional space. When cooling bulk materials, fine fractions are blown into the gaps by a vertical cylinder and a mixture extraction device containing a rotating disc with a drive and a conveyor belt.

The suction nozzle (nozzle) on the vertical wall of the flashing structure, from where the bulk material in a suspended state is emitted into the atmosphere, increasing the loss of the molding material.

The closest to the proposed technical essence and the achieved result is a box-shaped bunker containing a housing, a bottom, a kraaak, a shutter and a cooler located in the lower part of the housing NW

Such a bunker design takes up a lot of usable area and has an extremely low capacity, which requires a significant lengthening of the cooler available under the bunker, which in most cases is impracticable. In a small place and on the height of foundries, the use of a known bunker is impossible.

The purpose of the invention is to increase productivity and reduce production space.

This goal is achieved in that the device for cooling the molding material comprising a body, a bottom, a lid, a shutter and a cooler located in the lower part of the body is provided with a hollow ring with a nozzle and strips placed in the upper part of the body and connected-1 through holes in the wall of the housing with its cavity, through the nozzle with the atmosphere, moreover, in the hollow ring, are installed tangentially to the housing between adjacent holes in the wall of the housing, and the cooler is made in the form of a tubular manifold with holes.

FIG. 1 schematically shows the proposed device, a general view of / in FIG. 2 shows section A-A in FIG. 1, in FIG. 3 - section bb in fig „1.

The device is attached to support 1 and comprises a cylindrical body 2, a bottom 3, a cover 4, a separator 5, a shell b, strips 7, a diffuser 8, a vent 9, channels 10 for supplying cooling air and a shutter-11. The free volume 12. Is sealed and enclosed between the conical part of the bottom 3 and the plate of the support 1. The support rods 13 are hollow, tubular rings 15 with a large number of holes located in the lower part are welded to them with the help of pipes 14.

In the upper part of the cylindrical housing there are two rows of openings: upper openings 16 for connecting the body of the case to the cavity 17, where the guide bars 7, the diffuser 8 and the partition 18 are installed, and the lower holes 19 of small diameter for communication with the cavity 20, ): Achie to return settled sand to the bunker. Sumg-1Arna is the cross-sectional area of the upper hills 16 is significantly larger than the total number / ary area of the lower holes 19.

Claims (1)

DEVICE FOR COOLING THE FORMING MATERIAL, comprising a housing, a bottom, a lid, a shutter and a cooler located in the lower part of the housing, characterized in that, in order to increase productivity and reduce production space, it is equipped with a hollow ring with a nozzle and straps located in the upper the parts of the casing are connected through openings in the casing wall and through the nozzle to the atmosphere, and in the hollow ring, the strips are installed tangentially to the casing between adjacent openings in the casing wall and cool the spruce is made in the form of a tubular collector with holes. Fig.