CN111054892A - Method for solving casting slag hole by using foam slag collecting bag - Google Patents

Abstract

The invention discloses a method for solving casting slag hole by using a foam slag collecting bag, which comprises the following steps: manufacturing a slag collecting bag by using a foam material to form a foam slag collecting bag; an accommodating cavity for installing a foam slag collecting bag is formed in the casting die; the position where the containing cavity is arranged is positioned at the position where a casting is easy to generate slag holes; the foam slag collecting bag is filled into the accommodating cavity; closing the mold, casting, wherein the foam slag collecting bag is quickly gasified under the action of high-temperature molten iron, the molten iron and slag quickly enter the slag collecting bag, the slag cannot enter a casting cavity in the mold, namely, no slag exists on the casting, and after the molten iron is solidified and the casting is formed and shaked, an iron block formed by the foam slag collecting bag is cut off to obtain the casting without slag hole defects. After the measure is taken, the generation of air holes and slag holes at the position is avoided.

Description

Method for solving casting slag hole by using foam slag collecting bag

Technical Field

The invention relates to the technical field of casting, in particular to a method for solving casting slag holes by using a foam slag collecting bag.

Background

Non-metallic inclusions are in holes at the outer part and the inner part of the casting, and the shape is extremely irregular and the colors are different. Irregular holes are left after the casting is shot-blasted, which is commonly called slag holes. Slag holes are mostly formed in the upper surface of the casting, and the lower surface of the sand core or the place where slag is not easy to float.

The casting slag hole is caused by a plurality of reasons, which can be summarized as that ⑴ casting system is unreasonable in design, the slag blocking effect is poor, the slag enters into the mold during casting, the slag is not clean when ⑵ molten iron is treated, a pouring gate is not filled with the molten iron (particularly, the initial molten iron is too fine) during casting, the slag is brought in, ⑶ molten iron generates oxides with magnesium, rare earth and air during transportation, the molten iron is rolled into the mold together with the molten iron during casting, the oxides float to the surface of the casting together with sulfide and free graphite in the molten iron, ⑷ ladle repairing material has low refractoriness, new slag is generated during casting, the molten iron is rolled into the mold together with ⑸ casting temperature, the slag is not too late to overflow, the molten iron is not too long and stable during casting ⑹, the molten iron is cut off, ⑺ has large ash content along with the fluid inoculant (pulverized or too many particles below 200 meshes), the slag enters into the mold along with the molten iron during casting, ⑻ slag mesh does not work, only enters into the slurry, the slag hole along with the slurry, the slag is prevented from staying in the furnace, and the furnace slag hole remains in ⑼, and impurities are generated in the casting furnace during casting.

⑴ adopts closed or semi-closed pouring gate to enhance the effect of stopping slag, ⑵ uses slag removing agent with good expansion effect, molten iron is completely removed before being discharged, ⑶ fills the pouring gate to avoid gas and slag inclusion, ⑷ spreads heat insulating agent in the bag to change slurry into slag, the slag avoiding net can avoid slag but can not avoid slurry, ⑸ cross runner is overlapped by upper and lower boxes, slag collecting groove is arranged at the end, the function of collecting slag is played when the pouring initial pouring gate is not full, ⑹ uses clean charging material to reduce slag, ⑺ prevents molten iron from oxidizing, rapidly melts and pours, reduces intercrystalline slag defects, ⑻ improves refractoriness of the material of the bag repairing material, avoids secondary slag generated during pouring from entering into the mould, and when adopting the bag, ⑼ adds proper solvent to change impurities and harmful elements into low melting point and have good fluidity, low density floats upwards to remove slag, ⑽ improves proper temperature, and does not cut off when pouring.

The measures can well solve most obvious slag holes, but some measures are ideal and complex to implement, and the small slag holes of a plurality of pulp types cannot be effectively prevented, so that the small slag holes can be seen subcutaneously and cannot be detected before processing, and a pair of small slag holes can be seen obviously after processing. Therefore, it is important to find a more convenient, faster and more effective method for preventing the generation of slag holes.

Disclosure of Invention

The invention aims to provide a method for solving casting slag holes by using a foam slag collecting bag, wherein the foam slag collecting bag is added above a position which is easy to generate the slag holes, when molten iron is filled to the position, slag becomes to enter the slag collecting bag, and after the measure is adopted, the generation of air holes and slag holes at the position is avoided.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for solving casting slag hole by using a foam slag collecting ladle comprises the following steps:

manufacturing a slag collecting bag by using a foam material to form a foam slag collecting bag;

an accommodating cavity for installing a foam slag collecting bag is formed in the casting die; the position where the containing cavity is arranged is positioned at the position where a casting is easy to generate slag holes;

the foam slag collecting bag is filled into the accommodating cavity;

closing the mold, casting, wherein the foam slag collecting bag is quickly gasified under the action of high-temperature molten iron, the molten iron and slag quickly enter the slag collecting bag, the slag cannot enter a casting cavity in the mold, namely, no slag exists on the casting, and after the molten iron is solidified and the casting is formed and shaked, an iron block formed by the foam slag collecting bag is cut off to obtain the casting without slag hole defects.

Compared with the prior art, the invention has the following beneficial effects:

the foam is used for manufacturing a slag ladle model, and the slag ladle model is placed in a corresponding mould where a casting is easy to generate slag holes and is molded together without drawing; during pouring, under the action of high-temperature molten iron, foam is quickly gasified, the molten iron and slag quickly enter the slag collecting ladle, no slag exists on a casting, and an iron block formed by the slag collecting ladle is cut off after the molten iron is solidified and the casting is molded and shaked. The method can well solve the slag hole defect of the casting, and has simple, convenient and quick operation and low cost.

Drawings

FIG. 1 is a schematic diagram of the position of a slag collecting ladle and a casting, which solves a casting slag hole by using a foam slag collecting ladle.

In the figure: 1. a foam slag collecting bag; 2. casting defect positions; 3. and (5) casting.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution:

a method for solving casting slag hole by using a foam slag collecting ladle comprises the following steps:

manufacturing a slag collecting bag by using a foam material to form a foam slag collecting bag; the foam slag collecting bag is an entity foam block, can be a cylinder, a cube and the like, and is in an entity structure occupying a certain space.

An accommodating cavity for installing a foam slag collecting bag is formed in the casting die; the position where the containing cavity is arranged is positioned at the position where a casting is easy to generate slag holes;

the foam slag collecting bag is filled into the accommodating cavity;

closing the mold, casting, wherein the foam slag collecting bag is quickly gasified under the action of high-temperature molten iron, the molten iron and slag quickly enter the slag collecting bag, the slag cannot enter a casting cavity in the mold, namely, no slag exists on the casting, and after the molten iron is solidified and the casting is formed and shaked, an iron block formed by the foam slag collecting bag is cut off to obtain the casting without slag hole defects.

The foam is used for manufacturing a slag ladle model, and the slag ladle model is placed in a corresponding mould where a casting is easy to generate slag holes and is molded together without drawing; during pouring, under the action of high-temperature molten iron, foam is quickly gasified, the molten iron and slag quickly enter the slag collecting ladle, no slag exists on a casting, and an iron block formed by the slag collecting ladle is cut off after the molten iron is solidified and the casting is molded and shaked. The method can well solve the slag hole defect of the casting, and has simple, convenient and quick operation and low cost.

All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. A method for solving casting slag hole by using a foam slag collecting ladle is characterized by comprising the following steps:

manufacturing a slag collecting bag by using a foam material to form a foam slag collecting bag;

an accommodating cavity for installing a foam slag collecting bag is formed in the casting die; the position where the containing cavity is arranged is positioned at the position where a casting is easy to generate slag holes;

the foam slag collecting bag is filled into the accommodating cavity;

closing the mold, casting, wherein the foam slag collecting bag is quickly gasified under the action of high-temperature molten iron, the molten iron and slag quickly enter the slag collecting bag, the slag cannot enter a casting cavity in the mold, namely, no slag exists on the casting, and after the molten iron is solidified and the casting is formed and shaked, an iron block formed by the foam slag collecting bag is cut off to obtain the casting without slag hole defects.

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