SU1360887A1 - Method and apparatus for casting by vacuum suction - Google Patents

Abstract

The invention relates to foundry production, namely, to vacuum suction casting of hollow castings such as sleeves, cylinders with bottom. The purpose of the invention is to improve the quality of castings. In the bath 3, a constant level 5 of liquid metal is set, increasing the pressure of air in cavity 10 of the vessel. 8. When the level sensor 12 is triggered, the supply of compressed gas from source 11 stops. When the crystallizer 1 is immersed in the dispensing bath 3 for the required amount, the metal is sucked into the cooled form 2. After the required technological exposure, the vacuum is removed, the remaining liquid metal is drained back to B, the distributing bath, the crystallizer 1 is lifted and the casting is removed. The decrease in the level of the metal in the dispensing bath during the process of suction of the metal into the cooled mold 2 below the minimum level turns on the level sensor and gives a signal to supply compressed gas to the cavity 10. Stabilization of the level of the liquid metal in the dispensing bath ensures the production of high quality castings with a diameter more than 100 mm. 2 sec. f-ly, 1 ill. (L with Oi o oo CXD

Description

The invention relates to foundry, namely to vacuum suction casting of bushings, hollow cylinders with a bottom.

The purpose of the invention is to improve the quality of castings.

The drawing shows the proposed device, the cut.

A device for implementing the method

casting. When sucked into form 2, the level of liquid metal 4 in bath 3 decreases and, when the difference in level relative to constant 5 is 10 mm (minimum contact depth), the sensor turns on and gives a signal to source 11 of compressed air that air pressure has increased in cavity 10. Because of this, the liquid metal 9 rises again along the metal-containing mold 1, cooled by Q line 6 to bath 3, until it reaches 2, the dispensing bath 3 with liquid metal 4 filling bath 3 to a constant level 5. Dispensing bath 3 connected to metal pipe th channels 6 through 7, 6 metalloprovoda its lower part is immersed in a melting furnace 8 to 15 with a diameter greater than 100 mm.

no constant level 5.

Stabilizing the level of the liquid metal in the dispensing bath ensures high-quality castings and the use of molds to produce castings.

liquid metal 9. The cavity 10 of the furnace 8 is connected to a source 11 of compressed air, which is connected to a sensor 12 of a liquid metal level in a bath.

The method is carried out as follows.

Establish a constant level of metal 4 in the dispensing bath 3, increasing the air pressure in the cavity 10 above the metal 9 in the furnace 8. As a result, the liquid

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Claims (2)

1. Method of vacuum suction, which involves supplying a liquid metal to a dispensing bath from a melting furnace and sucking it from a dispensing bath to a cooled mold, characterized in that, in order to improve the quality of castings, during the process of sucking the liquid metal into ohmetal 9 from a melting furnace 8 the rising level of the liquid metal level along the metal pipe 6 and the channels 7 into the bath 3 until it reaches a constant level 5, after which the level sensor 12 sends a signal to the source 11 of compressed air to stop increasing in the transfer bath is maintained constant. 2. A device for pouring by vacuum, suction, containing a smelting furnace, a dispensing bath with liquid metal and of air in the cavity 10. Then, the cooled form is immersed 30, looking at the fact that the mold 1 with the cooled form 2 in the bath 3 with the liquid metal 4 before the toe of the mold 1 below the constant level 5 is submerged to the required depth, the liquid metal is sucked 4 in In order to improve the quality of the castings, the dispensing bath is installed on the melting furnace and is equipped with metal conduit placed in the melting furnace, the device is provided with a source of mold 2 and can withstand a certain time gas connected to the cavity by melting, after which the vacuum is removed; the furnace, and the liquid metal liquid level sensor is poured back into the bath 3, the mold 1 is lifted and removed metal, placed in a dispensing bath and connected to a source of compressed gas. casting. When sucked into form 2, the level of liquid metal 4 in bath 3 decreases and, when the difference in level relative to constant 5 is 10 mm (minimum contact depth), the sensor turns on and gives a signal to source 11 of compressed air that air pressure has increased in cavities 10. As a consequence, the liquid metal 9 rises again along the metal conduit 6 into the bath 3 until it reaches a diameter of more than 100 mm. no constant level 5. Stabilizing the level of the liquid metal in the dispensing bath ensures high-quality castings and the use of molds to produce castings. 20 Invention Formula 1. A vacuum suction method, which involves supplying a liquid metal to a dispensing bath from a melting furnace and sucking it from a dispensing bath to a cooled mold, characterized in that, in order to improve the quality of the castings, during the suction of the liquid metal into the cooled mold, the level of the liquid metal is in the dispenser bath is kept constant. 2. A device for pouring by vacuum, suction, containing a smelting furnace, a dispensing bath with liquid metal and cooled form, I examine with the fact that, In order to improve the quality of the castings, the dispensing bath is installed on the melting furnace and is equipped with a metal conductor placed in the melting furnace, while the device is equipped with a source of dry gas, connected to the cavity of the melting furnace, and a liquid level sensor metal, placed in a dispensing bath and connected to a source of compressed gas.