SU1360890A1 - Arrangement for inoculation of molten metal in mould - Google Patents

Abstract

The invention relates to foundry, in particular, to the technique of the internal modification of cast iron. The goal is to reduce the consumption of the modifier in the processing of the gulf. My metal. A dose of modifier 7 and a protective flux 8 are loaded into the reaction chamber 1. The roof of chamber 9 is installed, a stopper made of a low-melting material. The iron flows through the channels to the modifier and, after melting the plug 1I, enters channel 4 and comes into contact with the modifier. Through threshold 13, the modified cast iron enters the discharge gating channel. The device also ensures the stability of the processing process and eliminates the ablation of non-metallic inclusions in the mold. 3 hp f-ly, 4 ill. about (L (3 with O5 about 00 with about

Description

The invention relates to foundry, in particular, to the technique of the internal modification of cast iron.

The purpose of the invention is to reduce the consumption of the modifier when processing the Poured metal.

FIG. I presents the proposed device, a longitudinal section; in fig. 2 - the same, cross section; in fig. 3 and 4 - various stages of operation of the device.

The device contains a reaction chamber 1, an easily combustible element 2, channels 3 and 4, respectively, for the supply and removal of metal, material of form 5, one hundred b, modifier ator 7, protective flux 8, lid of the reaction chamber 9, auxiliary channel 10, fusible plug eleven.

The walls of the reaction chamber are made, for example, of graphite, i.e. heat resistant and high heat conductive material suitable for the intended purpose. For the manufacture of mold 5, for example, molding sand or chamotte, i.e. materials are sufficiently refractory and with high thermal resistance. The chamotte option is preferable, since the gating system in this case can be used many times.

The device works as follows.

The required dose of the modifier 7 and the protective flux 8 are loaded into the reaction chamber 1. The lid 9, the plug 11 of the low-melting alloy are installed, and the pouring of a metal, such as cast iron, begins. For some time, until the stopper 11 closes the path to the channel 4, the modifier 7 heats up due to the physical heat of the iron in the channels 3 (Fig. 3, the initial position). After the cork 11 is melted, the cast iron begins to flow into the channel 4, the Element 2, made for example of polystyrene, quickly burns and the cast iron 12 comes into contact with the modifier 7 (Fig. 4). At the same time, the cast iron rises in the reaction chamber to a certain level determined by the level of the modifier, the threshold value 13 at the end of the metal exit channel, and the presence of cast iron In channels 3. During the passage of the cast iron along the length of the reaction chamber, it is time to go through the modification processes. With this products

reactions — non-metallic inclusions, as lighter ones, remain in the chamber. Pure processed metal through channel 4 through the threshold 13 enters the mold. AT

At the end of the pouring of the next portion of the metal, a small amount of it together with the remnants of the products of the modification remain in channel 4 and partially in the reaction chamber. This melt residue is poured over

auxiliary channel 10 by rotating the whole system by 90 °. After that, the device is ready for processing a new batch of metal. This design of the device provides preheating of the modifier with molten metal.

and the constancy of the contacting surface of the reacting phases, thus saving modifier. In addition, the device ensures the stability of the processing process, eliminates the ablation of non-metallic inclusions in the mold, which ultimately increases

quality castings.

Claims (4)

1. A device for modifying a molten metal in a casting mold, containing a reaction chamber with a modifier, supplying and discharging gating channels, characterized in that, in order to reduce the consumption of the modifier during processing of the cast metal, the reaction chamber is installed in the supplying gating channel with the formation of flow-through cavities around its opposite side walls and a channel under the bottom part, separated from the flow-through cavities and the reaction chamber with easily removable poured melt by the elements, and from the outlet gating channel - by the threshold. 2. A device according to claim 1, characterized in that the feed gate is made with an auxiliary vertical channel communicating with the atmosphere. 3. A device according to claim 1, characterized in that the walls of the container are made of heat-resistant and highly heat-conducting material. 4. The device according to claim 1, characterized in that the channel under the bottom part is separated from the flow-through cavities by a low-melting plug, and from the cavity of the chamber by an easily combustible element. FIG. g (Pus.5 1rig