SU1359055A1 - Gating system - Google Patents

Abstract

The invention relates to foundry production. The purpose of the invention is to improve the quality of castings by further purification of the metal in the feeder. Gating system includes one hundred, gating, slag trap and feeder. The feeder towards the casting is made expanding in a vertical section and tapering in a horizontal section, while the vertical section of the feeder in the middle part has more sections of the feeder at the slag trap and at the exit to the casting. The casting system provides a more complete retention of non-metallic inclusions, a combination, favorable for the quality of castings, in one feeder of the lower and upper metal supply to the casting and ease of separation of the feeder from the casting. 2 Il. i (L with SP; ate

Description

The invention relates to foundry production and can be used to produce high-altitude castings, such as parts for electric motors, heating radiator sections.

The purpose of the invention is to improve the quality of castings. By additional purification of the metal in the feeder.

FIG. 1 shows a gating system; in fig. 2 is a view A of FIG. one.

. The casting system includes a hundred to 1 S runner 2, a slag catcher 3 and a feeder 4. The feeder 4 in a vertical section (Fig. 1) is initially rectangular and expanding towards the casting 5. In horizontal cross sections, the feeder is made tapering (FIG. 2). The cross section of the feeder 4 in the middle part is larger. its cross sections at the slag-trap and at the exit at the casting 5, which helps to keep inclusions that have penetrated into the feeder 4 from the slag-trap 3.

Litnikov system works as follows.

The molten metal from the stand 1 through the gate run 2 enters the slag trap 3, where it is pre-cleaned from slag

Then, from the slag-trap 3, the metal enters the horizontal rectangular part of the feeder 4, where it receives acceleration along the X axis and is directed to the part of the feeder, made in the form of an expanding socket. Here, the metal additionally receives acceleration along the Z axis from counteracting the flow of narrowing

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five

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five

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five

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walls in the horizontal section of the feeder and along the Y axis from the expansion of the walls in the vertical section of the feeder.

As a result, high-mass jets of metal, for which acceleration prevails along the X-axis, although they lose substantially speed, are directed to the casting 5, and non-metallic inclusions having less mass are deflected by the resultant forces Z and Y, to the upper the walls of the feeder.

Due to the fact that the shape of the feeder provides an expansion of the flow in its middle part and a narrowing at the exit to the casting 5, floating up inclusions are retained in the feeder. The shape of the feeder 4, in addition, provides a calm filling, a favorable combination in one feeder of the lower and upper-metal supply and, due to the narrowing in horizontal section, ease of separation of the feeder from the casting.

Claims (1)

Invention Formula Gating system containing one hundred, gating run, slag catcher and feeder, which is different in that, p. The purpose is to improve the quality of castings by additional cleaning of the metal in the feeder, the feeder is made expanding in a vertical section and tapering in a horizontal section, while the area of the vertical section of the feeder in the middle part of it is larger than the area of the vertical section at the inlet and outlet. figl duff A 2