SU846062A1 - Gate arrangement - Google Patents

Description

(54) LITHERIC DEVICE

I

The invention relates to foundry and can be used for slurry casting of melts.

Closest to the invention is a gating device for introducing micro-refrigerators, consisting of a metering hopper, a vortex bowl, a supply of a channel and a drain. A feature of the device is the presence in addition to the translational, as well as the additional component of the velocity of the liquid metal in the vortex bowl and in the stand. As a result of rotation, the liquid metal is thrown to the walls of the bowl and an air cavity (vortex core) is formed along the axis of rotation, into which the micro coolers are introduced. The convective currents created in the center of the vortex capture the incoming micro-coolers, which are then transported in the center of the metal jet 1.

However, along with the positive effect of the vortex funnel on the assimilation and uniform distribution of microcoolers in the liquid metal, the vortex funnels also cause harmful consequences, due to the fact that the centrifugal force of the vortex formed in the sprue bowl removes the metal from the inlet As a result, the head height decreases, and a part of the cross section of the hole is occupied by an air cavity. These phenomena caused by a whirlwind reduce the flow of liquid metal. In addition, with a vortex funnel injected into the cavity of the mold

 air, thereby increasing the amount of waste casting through the gas sinks, and discharging the flow in one hundred cubic meters opens the walls of the mold and increases the amount of blockages in the metal. When the suspension pouring the melt,

Q In order to fully assimilate the injected refrigerators, it is necessary to have a vortex funnel in the bowl, and to extinguish the vortex at the output of one hundred to one.

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

S The goal is achieved by the fact that in the gating device, which has a metering hopper, a supply channel, a vortex bowl and one hundred c, a cross piece of refractory material is installed at the entrance of the stand, the upper part of the cross is located above the entrance hole of the stand at a height of 0 , 5-1.5 diameters of the stand, and the lower part is included in the hundred to a depth of 0.5-. 1.0 of its diameter.

Claims (1)

Claim A gate device comprising a bun ¹⁰ cer-dispenser, a supply channel, a vortex cup and a riser, characterized in that, in order to improve the quality of castings, it is equipped with a cross made of refractory material installed at the inlet of the riser, with _{15 the} upper part of the cross located above the inlet riser at a height equal to 0.5-1.5 of its diameter, and its lower part enters the riser to a depth equal to 0.5-1.0 of its diameter. ²⁰ Sources of information taken into account in the examination 1. USSR copyright certificate No. 634840, cl. B 22 C 9/08, 1976.