SU1052314A1 - Method of manufacturing moulds - Google Patents

Abstract

THE METHOD OF MANUFACTURING THE CASTING, FORMING FORMS, including filling the model-anchor equipment with the mixture And paying the mixture with the movable walls of the flask and the press plate, from l and h. and and and with. By the fact that, in order to improve the uniformity of the density distribution of the mixture in the mold, in the process of filling the mixture, the mobile flocks of the flask are moved apart and the model is inserted. r, i r ,,, -, - “a, .tt / rf J4 - I rS / .lr -:. V.... / --- L. . . / NII if-A; v,.,., -I.4, r fiji I

Description

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The invention relates to foundry, in particular, to methods for producing complex, high casting molds.

The known method of making casting molds:, (including fadding with model-6-rigging equipment with the mixture and sealing the mixture with the moving walls of the flask and the upper press plate i.

However, when free-filling the mixture in the flask for blunt molding, it is possible that the mixture is not evenly distributed throughout the ogüki volume and around the shaded parts of the models, which, when using large and complex models, can reduce the quality of the forli, and hence the technological capabilities of the latter are limited. .

The purpose of the invention is to improve the uniformity of the density distribution of the mixture in the form. .

This goal is achieved in that according to the method, which includes filling the model-ancillary equipment with the mixture and compacting the mixture with the movable walls of the flask and the press plate during the process of filling with the mixture, the movable shells of the flask are moved apart and the model is shaken.

FIG. 1 shows a device for implementing the proposed method (the initial moment of the prasing process) J in FIG. 2 - the same (final moment of the pressing process),.

The method is carried out as follows.

A flask of flaskless molding 1, | by cylinders 2 is mounted on a sub-frame of a box 3. The movable walls 4 of the flasks 1 are shifted. A molding mixture is supplied from the hopper 5. At the same time as backfilling - the moving walls 4 are pushed apart by piston cylinders 6, and the model 7 is shaken to shake the cylinder 8.

Upstream Hyvadia occurs as follows.

Compressed air is supplied through a hose 9 through an air distributor channel into the working cavity 10 of the agitator.

cylinder 8. At the same time, the shaking cylinder with the model plate 11 and the model 7 moves up and the hammer 12 goes down, compressing the spring, until the exhaust of compressed air from the working cavity. After exhausting the compressed air into the cavity 13, the shaking cylinder 8 collides with the hammer 12 and the shock pulse is transmitted to model 7..

The time consistency of the molding sand filling process, moving the sliding walls and pulsing the model eliminates the influence of lateral pressure forces on the walls on the shaking process. In addition, shaking improves the distribution of the mixture in the chamber and pre-compresses it before the final volume by pressing (i.e. compaction with the four moving walls 4 of the molding chamber). Simultaneously or sequentially with volumetric pressing, the mixture is pressed by the upper press plate 14. i

It is possible that, simultaneously with the volumetric extrusion, the mode imparts a shock impulse.

In this case, the model plate is set flush with the sub-model frame 3 and the shock pulses (vibrations) occur when the impactor 12 and the shaking cylinder 8 collide.

Thus, volumetric pressing with simultaneous vibration of the model is provided, which significantly increases the versatility of the method, improves the compaction uniformity and the quality of the formulas and. After the extrusion process has been completed, the upper press plate 14 is retracted and the models are manufactured using one of the known methods.

The application of the proposed method provides a more reliable and uniform compaction of large bow or bezopochny forms of any complexity, increases the service life of the flasks, so (as the effect of vibration on the flask is excluded.

Claims (1)

METHOD FOR PRODUCING CASTING FORMS, including filling model-and-tooling equipment with a mixture and compacting the mixture with movable flask walls and a press plate, with τη and more often in order to increase the uniformity of the density distribution of the mixture in the mold during filling with a mixture the movable walls of the flask are pushed apart, and the model is shaken, · g.