SU1199426A1 - Mixer for preparing cold-setting composition - Google Patents

Abstract

A MIXER FOR PREPARING COLD-HARDING MIXTURES, including a frame with a rotary column and a lever, on which a rotatable platform with a horizontal mixing chamber, and a powder feed mechanism is installed. nozzles for supplying liquid components with outlet openings and a vertical paddle mixing chamber located below the horizontal mixing chamber on the side opposite to its loading area and having a drive shaft, loading and unloading openings, characterized in that, in order to improve the quality of mixing and reduction labor costs for cleaning the mixer from the hardened mixture, the vertical blade mixing chamber is equipped with a distribution conical funnel, concentrically fixed on its Drive shaft and facing pain (at the bottom of the load is the internal opening of this chamber, the inlet opening is located above the outer surface of the distribution conical funnel, and the nozzles for feeding the liquid components are placed in the cavity of the funnel with the outlet openings facing the inner surface. Od

Description

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The invention relates to foundry, in particular, to equipment for the preparation of molding and core mixtures of cold hardening with the sequential mixing of coponents. I

The purpose of the invention is to improve the quality of mixing and reduce labor costs for cleaning the mixer from the hardened mixture.

FIG. 1 shows the mixer, a general view | in fig. 2 shows section A-A in FIG. one. .

The mixer for preparing cold-hardening mixtures contains a frame 1, a rotary column 2 with a lever 3, a rotary platform 4 with a screw auger horizontal spatula mixing chamber 5 installed on it, and a mechanism 6 for feeding powdered material.

At the free end of the horizontal chamber 5, a vertical high-speed chamber 7 is fixed, equipped with an actuator 8, a casing 9, a charging opening 10 and a discharge opening 11. The drive shaft 12 of the vertical mixing chamber 7 is fixed to the blades 13 and the distribution funnel 14 is concentrically mounted to function as a device forming separate flows of the components of the mixture. A conical funnel 14 is located under the loading opening 10 and with a large diameter facing the discharge opening 11. The preferred angle between the surrounding cone of the funnel 14 is 90-150 °. The chamber 7 is provided with nozzles 15 for feeding the liquid components of the mixture directly into it. The nozzles 15 are located under the bottom surface of the funnel 14 and are located in the plane of the horizontal section of the conical distribution funnel 14 so that the jets of the liquid component have an i-i direction on its inner surface in the direction of rotation of the drive shaft 12 of the vertical mixing chamber 7.

The nozzles 15 are located at a preferred distance from the upper end of the conical distribution funnel, 0.5-0.8 in height of the funnel.

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The mixer is equipped with a receiving funnel 16 for feeding sand into the mixer, a sloping pipe 17 connecting the funnel 16 with the horizontal mixing chamber 5. On the free End of the latter, a bracket 18 is attached, which serves for the operator to move the vertical mixing chamber 7 over the process tank to be filled. On the bracket 18 there is a mixer control panel 19. For higher performance mixers, the remote control is separately separated, next to the mixer.

The mixer works as follows.

The mixing chamber 7 is moved by the operator using the clip 18.

20 above the tooling; a pillar box or flask (not shown) to fill it. cold-hardening mixture. To prepare the mixture in the intake funnel 16

25, sand is fed from a workshop bunker (not shown), which, through an inclined pipe 17, enters a horizontal mixing chamber 5. Powdered material is also fed into the same chamber using mechanism 6.

In the horizontal mixing chamber 5, the sand and powdered material are mixed;

, g through the loading opening 10 into the vertical mixing chamber 7. on the upper surface of the distribution funnel 14 and are formed into a ring-shaped flow. Liquid components are supplied to the mixture.

the nozzles 15 onto the bottom surface of the conical funnel 14 are mixed on it between themselves, under the action of centrifugal forces are dropped from the column 14, sprayed at the same time, and fall into the annular flow of sand, connected to it. The final mixing of the components of the mixture is carried out by paddles 13, after which the mixture is discharged through the discharge opening 11 out of the mixing chamber 7 into the processing chamber.

The presence in the vertical mixer, mixer chamber of the device 55 for forming separate streams, the components of the mixture, can significantly improve the quality of mixing of the mixture by mixing liquid

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between each other before mixing them with the sand. This achieves a high degree of uniformity of distribution of the binder and hardener in the film around the sand grains, improves the curing conditions of the mixture, increases the strength of the rods and shapes, and on this basis provides conditions for reducing the consumption of the binder system (binder, hardener). composition of the mixture.

The feeding and spraying of the liquid components of the mixture directly into the vertical mixing chamber makes it possible to eliminate the overgrowing of its loading opening as a result of adhesion of the partially hardened

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mixtures, which increases the cycle

nonstop mixer

and increases its performance.

The flow of the liquid components of the mixture directly into the high-speed vertical mixing chamber allows the production of mixtures using liquid materials with a higher viscosity, which greatly expands the technological capabilities of the mixer, allows it to produce not only sand-resin, but also, for example, sand-liquid mixtures.

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The annual economic efficiency from the introduction of one mixer is about 250 thousand rubles.

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Claims (1)

MIXER FOR PREPARING COLD-MIXING MIXTURES, including a bed with a rotary column and a lever, on which a rotary platform with a horizontal mixing chamber is installed, a powder material supply mechanism, nozzles for supplying liquid components with outlet openings and a vertical paddle mixing chamber located under the horizontal mixing chamber from the side opposite to the section of its loading, and having a drive shaft, loading and unloading holes, characterized in that, for the purpose of improving the quality of mixing and reducing labor costs for cleaning the mixer from hardened mixture, the vertical paddle mixing chamber is equipped with a conical distribution funnel, mounted on its drive shaft and facing a large opening to the discharge opening of this chamber, the loading hole is located above the outer surface of the distribution conical funnel, and the nozzle for supplying liquid components are placed in the cavity of the funnel with the direction of their outlet openings towards the inner erhnosti.