CN112317694A

CN112317694A - Buoyance-adjusted slag stopping pouring cup

Info

Publication number: CN112317694A
Application number: CN202011371664.0A
Authority: CN
Inventors: 蔡红涛; 田银良; 高杨; 赵强; 李丽; 李鹏飞
Original assignee: Xiangyang Wu Er Wu Pump Industry Co ltd
Current assignee: Xiangyang Wu Er Wu Pump Industry Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-02-05

Abstract

The invention discloses a buoyancy-adjusted slag-stopping pouring cup, which comprises a pouring cup body, a slag-stopping plate and a floating limit platform, wherein the floating limit platform is arranged on the pouring cup body; the upper end of the pouring cup body is provided with a cavity for containing molten steel, and the slag trap is arranged in the middle of the pouring cup body cavity through a slag trap limiting groove, so that the pouring cup body cavity is divided into a settling zone and a pouring zone; the lower end of a pouring area in the cavity of the pouring cup body is provided with a pouring hole; the bottom of the cavity of the pouring cup body is provided with a floating cavity of a slag trap, and the upper port part of the pouring cup body is provided with a floating limit platform; when the buoyancy of the molten steel contained in the settling zone to the slag trap is larger than the gravity of the slag trap, the slag trap floats upwards to communicate the settling zone with the bottom of the pouring zone, and the floating height of the slag trap is limited by the floating limiting table. The pouring cup solves the problem that the steel slag enters a sand box cavity along with molten steel during pouring to cause slag inclusion of a casting.

Description

Buoyance-adjusted slag stopping pouring cup

Technical Field

The invention relates to a buoyancy-adjusted slag stopping pouring cup, and belongs to the technical field of casting.

Background

During the pouring of the cast steel, the steel is poured into the mould cavity through a pouring cup, which is usually a funnel-shaped pouring nozzle, made separately or directly in the mould, becoming an enlarged part of the sprue top. The part is the first contact gate for molten steel injection. At present, a pouring cup which is commonly adopted in the industry is a sand-type pouring cup, a funnel-type die is adopted, resin sand is used for manufacturing, and the pouring cup is molded after the resin sand is solidified.

Molten steel can generate certain steel slag during smelting, the steel slag is poured into a steel ladle after tapping, the steel slag cannot be completely removed through deslagging operation, and a small amount of steel slag still floats on the surface of the molten steel due to the fact that the density of the steel slag is lower than that of the molten steel.

The pouring cup is the first contact position of molten steel entering a casting mold, and due to the improper design of the pouring cup, scum on the surface of the molten steel enters a cavity during pouring, so that the defect of slag inclusion casting is generated.

Disclosure of Invention

The invention aims to overcome the defect that scum on the surface of molten steel enters a cavity to cause slag inclusion casting when the traditional sprue cup is used for pouring, and provides a buoyancy-adjusted slag-retaining sprue cup.

The purpose of the invention is realized by the following technical scheme:

the invention relates to a buoyancy-adjusted slag-stopping pouring cup, which comprises a pouring cup body, a slag-stopping plate and a floating limiting platform;

the upper end of the pouring cup body is provided with a cavity for containing molten steel, and the side wall of the middle part of the pouring cup body cavity is symmetrically provided with slag trap limiting grooves; the slag trap is arranged in the middle of the pouring cup body cavity through a slag trap limiting groove, so that the pouring cup body cavity is divided into a settling zone and a pouring zone; the lower end of a pouring area in the cavity of the pouring cup body is provided with a pouring hole; the bottom of the cavity of the pouring basin body is provided with a slag trap buoyancy cavity, when the slag trap slides to the bottom of the cavity of the pouring basin body along a slag trap limiting groove, one end of the bottom surface of the slag trap is lapped on the bottom surface of the sedimentation zone, and the other end of the bottom surface of the slag trap is suspended above the slag trap buoyancy cavity; the upper port part of the sprue cup body is provided with a floating limit platform;

when the buoyancy of the molten steel contained in the settling zone to the slag trap is larger than the gravity of the slag trap, the slag trap floats upwards to communicate the settling zone with the bottom of the pouring zone, and the floating height of the slag trap is limited by the floating limiting table.

Working process

Before the pouring cup is used, the inner cavity of the pouring cup body and two sides of the slag trap are coated with refractory paint, after the pouring cup body is dried, the pouring cup body is placed at the top of the sand box, the pouring hole is aligned with the sprue in the sand box, and the pouring cup body is fixed. And inserting the slag trap into the lowest end of the inner cavity of the pouring cup body to divide the inner cavity of the pouring cup body into a settling zone and a pouring zone. When pouring, the ladle opening is aligned to the settling zone, the molten steel is firstly poured into the settling zone, the liquid level continuously floats upwards, the steel slag floats above the molten steel in the settling zone due to the fact that the density of the steel slag is lower than that of the molten steel, the buoyancy of the molten steel contained in the settling zone to the slag trap is smaller than the self gravity of the slag trap, and the bottom of the settling zone is isolated from the pouring zone, so that the molten steel is fully settled in the settling zone. When molten steel is poured into a settling zone to about 2/3 of the height, the buoyancy of the molten steel contained in the settling zone to the slag trap is larger than the gravity of the slag trap, the slag trap floats upwards, the bottom of the settling zone is communicated with the pouring zone, and meanwhile, the slag trap floats upwards under the limit of the upwards-floating limit platform, so that the lifting height of the bottom of the slag trap is 30-40 mm; and the precipitated molten steel overflows to a pouring area from the bottom of the slag trap and enters the cavity of the sand box through a pouring hole. And continuously injecting the molten steel into the settling zone to keep the liquid level of the molten steel at about 2/3 till the casting is finished.

Advantageous effects

1. The sprue cup provided by the invention has the advantages that the slag blocking and filtering functions are added, so that the problem of slag inclusion of a casting caused by the fact that steel slag enters a cavity along with molten steel during pouring can be solved;

2. the density of the slag trap is smaller than that of molten steel, the slag trap floats upwards and is limited by buoyancy, automatic slag trap control is realized, and the operation is simple and safe;

3. the pouring cup has the advantages of simple structure, convenient material taking, low manufacturing difficulty and batch use.

Drawings

FIG. 1 is a front cross-sectional view of a pouring cup of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of a settling state of the pouring cup according to the present invention;

FIG. 4 is a schematic view of a pouring state of the pouring cup of the present invention;

in the drawings, 1-the pouring cup body; 2-slag trap; 3-floating up a limit table; 4-molten steel; 5-steel slag; 11-a pouring hole; 12-a precipitation zone; 13-a pouring area; 14-slag trap buoyancy chamber.

Detailed Description

The invention is further described with reference to the following figures and examples.

Examples

As shown in fig. 1 and 2, the buoyancy-adjusted slag-stopping pouring cup comprises a pouring cup body 1, a slag-stopping plate 2 and a floating limiting platform 3;

the upper end of the pouring cup body 1 is provided with a cavity for containing molten steel, and the side wall of the middle part of the cavity of the pouring cup body 1 is symmetrically provided with slag trap limiting grooves; the slag trap 2 is arranged in the middle of the cavity of the pouring cup body 1 through a slag trap limiting groove, so that the cavity of the pouring cup body 1 is divided into a settling zone 12 and a pouring zone 13; the lower end of a pouring area 13 in the cavity of the pouring cup body 1 is provided with a pouring hole 11; a slag trap buoyancy cavity 14 is formed in the bottom of the cavity of the pouring basin body 1, when the slag trap 2 slides down to the bottom of the cavity of the pouring basin body 1 along a slag trap limiting groove, one end of the bottom surface of the slag trap 2 is lapped on the bottom surface of the sedimentation zone 12, and the other end of the bottom surface of the slag trap 2 is suspended above the slag trap buoyancy cavity 14; the upper end opening part of the sprue cup body 1 is provided with a floating limit platform 3;

when the buoyancy of the molten steel contained in the settling zone 12 to the slag trap 2 is larger than the self gravity of the slag trap 2, the slag trap 2 floats upwards to communicate the settling zone 12 with the bottom of the pouring zone 13, and the floating height of the slag trap 2 is limited by the floating limiting table 3.

Working process

Before the pouring cup is used, the inner cavity of the pouring cup body 1 and two sides of the slag baffle plate 2 are coated with refractory paint, after the pouring cup body 1 is dried, the pouring cup body is placed on the top of a sand box, a pouring hole 11 is aligned with a straight pouring gate in the sand box, and the pouring cup body 1 is fixed. The slag trap 2 is inserted into the lowest end of the inner cavity of the pouring cup body 1, so that the inner cavity of the pouring cup body 1 is divided into a settling zone 12 and a pouring zone 13. During pouring, a ladle opening is aligned to a settling zone 12, molten steel 4 is poured into the settling zone 12 firstly, the liquid level continuously floats upwards, the density of steel slag 5 is lower than that of the molten steel 4, therefore, the steel slag 5 floats above the molten steel 4 in the settling zone 12, and fig. 3 is a schematic diagram of a settling state of a pouring cup of the invention, at the moment, the buoyancy of the molten steel contained in the settling zone 12 to the slag baffle 2 is smaller than the self gravity of the slag baffle 2, and the bottom of the settling zone 12 is isolated from the pouring zone 13, so that the molten steel 4 is fully settled in the settling zone 12. When the molten steel 4 is poured into the settling zone 12 to about 2/3 of the height, the buoyancy of the molten steel contained in the settling zone 12 to the slag trap 2 is larger than the gravity of the slag trap 2, the slag trap 2 floats upwards, the bottom of the settling zone 12 is communicated with the pouring zone 13, and the slag trap 2 floats upwards under the limit of the floating limit table 3, so that the lifting height of the bottom of the slag trap 2 is 30-40 mm; the precipitated molten steel overflows from the bottom of the slag trap 2 to a pouring area 13 and enters the inside of a mold cavity of the sand box through a pouring hole 11, and fig. 4 is a schematic diagram of the pouring state of the pouring cup of the invention. The molten steel is continuously poured into the settling zone 12 to keep the liquid level at about 2/3 till the casting is finished.

Claims

1. A floating force adjusting slag stopping pouring cup is characterized in that: comprises a pouring cup body, a slag trap and a floating limit platform;