SU1178794A1 - Method of emptying vacuum film moulds - Google Patents

Abstract

METHOD OF HANDLING VACUUM-BUT-SHIENOCHNY FORMS, including the removal of the film from the lower mold control, the installation of the form on the failed screens of the STGG lfftl g a.,;,. -... ,,,,. Fig. 1 cu with a hopper, removing the dilution in the mold and removing the filler into the hopper, characterized in that, in order to improve working conditions by reducing dust release, the hopper is pre-filled with 95-100% bulk filler after installing the shape of the hopper cavity vacuum, vacuum. in the form and the bunker are leveled, and removal of the accumulator from the mold is carried out simultaneously with its removal from the bunker to the original volume in the latter, while simultaneously removing the vacuum in the bin and in the mold. K8 vacuum nor it station

Description

The invention relates to foundry, in particular to knocking out molds obtained by vacuum film molding.

The aim of the invention is to improve working conditions by reducing dust emissions.

In FIG. 1 shows the form, the initial position, before removing the filler from the flask; in FIG. 2 - mutual 10 location of the filler and casting after removing the vacuum from the mold cavity and the hopper; in FIG. 3 - position of the casting, filler and flask at the end of the process. fifteen

For emptying, the form 1 with the lower flask removed from the countertop is installed on a failure grid 2 connected to the receiving hopper 3. Around the grate perimeter 20 are installed gaskets 4. In the lower part, the hopper is equipped with an unloading device 5 (for example, a conveyor belt). In the upper part of the hopper there is a gable slider 6 and perforated suction pipes 7 connected to the vacuum system, as well as a device for maintaining level 8. The upper counter-plate is closed with synthetic film 9.

The proposed method is as follows.

The cooled cooled mold 1, which is under vacuum (vacuum of at least 500 mm Hg) with the film previously removed from the counter bottom flask, is installed on the failure grid 2, through the sealing gaskets 4. The receiving hopper 3 is then filled with 96- 100% of its volume. After installing the mold on the grid through the perforated pipes 7 connected to the vacuum system and located in the upper part of the hopper 3, create a resolution in the latter. In the process of creating a vacuum in the hopper, approaching the vacuum in the form, the filler under the influence of gravitational forces fills the free space in the hopper, which does not exceed 5% of its volume. After that, the vacuum is disconnected from the mold and the hopper, the film 9 is removed from the counterladder of the upper flask and, using the unloading device 5, the filler is removed from the hopper, which in turn ensures that the mold is freed from the filler. When the filler flows from the mold into the hopper, the discharge device is automatically switched off by means of a level 8 maintenance relay. In this case, the hopper remains filled again with no less than 95% of its volume.

I

Such a scheme of vacuum-film forms helps to prevent dust formation.

FIG. 2

Fig 3

VNIIIPI Order 5611/23 Circulation 747 Subscription

Branch of the PPP Patent, Uzhgorod, Project 4,

Claims (1)

METHOD OF EMPTYING VACUUM-FILM FORMS, including removing the film from the bottom contrada mold, installing the mold on a failure grid with a hopper, removing the vacuum in the mold and removing filler in the hopper, characterized in that, in order to improve working conditions by reducing dust, the hopper is pre-filled with 95-100% granular filler, after setting the mold, the cavity of the hopper is evacuated, rarefaction is leveled in the mold and hopper, and the drive is removed from the mold while it is removed from the hopper until one volume of the latter, at the same time relieve the negative pressure in the bunker and in shape. Figure 1 SHLT ¹ ns 1178794 2