SU1006035A1 - Mixer for producing core mixtures - Google Patents

Abstract

A MIXER FOR PREPARING STEAR MIXTURES, containing a hopper with a gate NBS feeder, a mixing chamber with guides to the mixture, inside of which is placed a switchgear for supplying liquid components, characterized in that, in order to expand the technological components of the mixer, it is equipped with an additional mixing chamber, made in the form of drive rollers installed in pairs, an additional device for feeding liquid components, located under the additional mixing chamber, and a detachable camera, made in a drive vertical worm-Q view "ka. (L S CD o sd

Description

The invention relates to foundry production and can be used primarily for the preparation of small casting cores from cold hard sand-resin, liquid glass or other plastic mixtures in small-scale and individual production.

Known mixer containing the hopper, the slide gate, the screw and the supply system in the mixer of liquid components. A vibrating table C 1} is used to compact the mixture.

The disadvantages of the mixer are significant losses of the mixture at the beginning and end of the mixing process in the manufacture of small rods of small series, where, for technological reasons, frequent shutdowns and starts of the mixer are required. In this case, the mixture is fed into the core box and compacted manually.

The closest to the invention in technical essence and the achieved result is a mixer containing a hopper with a slide gate feeder, a mixing chamber with mix guides, inside of which is placed a distribution device for supplying liquid components. This mixer eliminates blend loss at the beginning and end of the blending process 2.

The disadvantages of this mixer are the need for manual compaction of the mixture and the possibility of its use only for a certain performance. If its productivity is low, when dosing sand through a gap commensurate with several diameters of sand grains, sand moisture is insignificant or, wetting the edges of the dispenser with vapors of liquid components, due to the appearance of surface tension forces, adhesion forces, impairs metering accuracy and even cessation of sand supply. .

The purpose of the invention is to expand the technological capabilities of the mixer.

This goal is achieved by the fact that the mixer for preparing core mixtures, containing a hopper with a slide gate feeder, a mixing chamber with guides for the mixture, inside of which is placed a distribution device for feeding liquid components, is equipped with an additional mixing chamber, made in the form of pairs of installed driving rollers, an additional device for supplying liquid components. located under the additional mixing chamber and sealing chamber, made in the form of of the screw.

The drawing shows the mixer, a general view.

The mixer for the preparation of core mixtures contains a hopper 1 with a gate feeder 2, a mixing chamber 3 with guides 4 for a mixture, inside of which is placed a distributor 5 for supplying one of the liquid components. In addition to iToro, it is equipped with an additional mixing chamber 6 with a screw 7 horizontally located in it, connected to a device 8 for supplying another liquid component, and a sealing chamber 9 with a screw 10 coaxially placed in it with its actuator 11. Guides 4 are equipped with drive rollers 12 installed in pairs under them. The device is equipped with a lifting table 13 with the power cylinder 14, on which is placed the core box 15.

The mixer works as follows.

The sand from the hopper 1 through the gate valve 2 enters the additional mixing chamber b, where it is mixed with the catalyst fed through the distributor 8. From the chamber, the clad mixture is conveyed by the screw 7 to the mixing chamber 3 to the guides 4 and the drive rollers 12, Which the mixture comes out in the form of a continuous tape of a given thickness in the application area of the binder. .

In the zone of application of the binder to the molding mixture, the binder is supplied by the device 5 by a spray method. Under the action of surface tension, uniform coating of sand grains with binder occurs, i.e. final preparation of the mixture.

The mixture then enters the sealing chamber 9, from where it is conveyed by the screw 10 to the core box 15, pressed against the outlet of the chamber 9 by the table 13.

The amount of the mixture for each volume of the core box can be determined in advance, the dosage is made over time. The time counter is set on the mixer control panel, it automatically shuts off the flow of the clad mixture from the mixing chamber 3.

After compaction of the mixture, turn off the screw 10, lower the table 13, and remove the rod chic 15 with the finished rod. Then a new box is placed on the table 13, pressed by the table 13 on the outlet of the chamber 9 and the cycle is repeated.

By equipping the mixer with two mixing chambers and the presence of guide and drive rollers, the mixer is operated with virtually no loss at the beginning and end of the process of mixing the mixture and making the rod. Besides,

3 1006035Л

the possibility of dosage-shadowing is provided to allow a largely predetermined portion of the mixture to mechanize the work of rods

rod volume and mechanized-in conditions of small-scale production of small rods of the medium, increase productivity

personal capacity. Due to the presence of compaction, to improve the sanitary-hygienic chamber, the use of inoperative labor slots. .

Claims (1)

A MIXER FOR PREPARING ROD MIXTURES, comprising a hopper with a slide gate, a mixing chamber with guides for the mixture, inside which a dispenser for supplying liquid components is located, characterized in that, in order to expand the technological capabilities of the mixer, it is equipped with an additional mixing chamber made in the form pairwise mounted drive rollers, an additional device for supplying liquid components located under the additional mixing chamber, and sealing camera as the spacecraft. made in a vertical drive auger- _o , 1006031