RU189117U1 - LITHERIC SYSTEM FOR THE MANUFACTURE OF CASTINGS BY CASTING ON THE MELTED MODELS - Google Patents

Abstract

The casting system for the manufacture of castings by investment casting contains a sprue bowl, riser, annular manifold, feeders and profits. The riser is connected to the annular manifold through feed channels. The feed channels are made with a slope from the riser to the annular collector and have a spiral shape. Profits are located on the ring collector opposite the feeders.

Description

This utility model relates to foundry, namely, devices for supplying molten metal, and can be used in the manufacture of Gating systems for the manufacture of castings by casting on investment casting.

Closest to the claimed utility model is a casting system for the manufacture of castings by investment casting, containing a sprue bowl, a riser connected to an annular collector through feed channels, and feeders (Golovin, S.Ya. Special types of casting: A brief reference material / C. J. Golovin. - M: GNTI engineering literature, 1959. - Figure. 12, a). - p. 19).

The known gating system has the following disadvantages:

does not provide guaranteed cleaning of metal from non-metallic inclusions (slag, sand, ceramic particles) and gas shells, leading to the marriage of products;

has a large weight gating system.

The claimed technical solution is aimed at obtaining castings without non-metallic inclusions (slag, sand, ceramic particles) and gas sinks, as well as reducing the weight of the gating system.

The technical result is achieved by the fact that in the runner system for the manufacture of castings by investment casting, containing a runner bowl, a riser connected to the annular collector through feed channels, and feeders, feed channels are inclined from the riser to the annular collector and have a spiral shape, with this is located on the ring collector opposite the feeders profits.

FIG. 1 shows a casting system for the manufacture of castings by investment casting, a general view.

FIG. 2 shows section A-A in FIG. one.

FIG. 3 shows a section BB in FIG. 2

The casting system for the manufacture of castings by investment casting contains a sprue bowl 1, a riser 2 connected to an annular manifold 3 by means of supply channels 4, and feeders 5.

The feed channels 4 are made with a slope from the riser 2 to the annular manifold 3 and have a spiral shape, which contributes to the formation of directional circular motion of the metal in the annular manifold 3 when pouring into the mold.

On the ring collector 3, opposite the feeders 5, are located profits 6, contributing to the targeted feeding of castings, which helps prevent the formation of a shrinkage defect. In addition, the presence of profits 6 allows you to reduce the size of the ring collector 3 in the cross section (width, height), resulting in reduced total weight Gating system and increases the yield.

The claimed gating system works as follows.

When the metal is poured into the mold, it flows through the casting bowl 1 into the riser 2. Then, the metal, passing through the supply channels 4 and the annular manifold 3, fills the cavities forming the castings. In this case, the centrifugal force created by the circular movement of the metal in the annular manifold 3 provides for the concentration of non-metallic inclusions (slag, sand, ceramic particles) and gas sinks that fall during pouring into the mold, along the wall of the annular manifold 3 opposite to the place of feeding of the castings. Thus, in the cavity forming the castings, the purified metal enters.

Using the proposed technical solution allows you to:

to exclude the possibility of non-metallic inclusions (slag, sand, ceramic particles) and gas holes in the cavity forming castings, due to the supply channels made with a slope from the riser to the annular collector and having a spiral shape;

reduce the weight of the gating system, by reducing the cross-section of the annular collector between profits.

Claims (1)

Litnikovaya system for the manufacture of castings by casting on investment casting, containing a gating bowl, a riser connected to the annular collector by means of supply channels, and feeders, characterized in that the supply channels are inclined from the riser to the annular collector and have a spiral shape, while on the annular the collector opposite the feeders are located profits.

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