Spiral slag discharge ladle containing gas

Abstract

The utility model relates to a spiral slag ladle containing gas, which is arranged on the edge of a pouring gate and comprises a curved overflow channel and a slag ladle, one end of the curved overflow channel is communicated with a slag outlet on the edge of the pouring gate, the other end of the curved overflow channel is tangentially communicated with the slag ladle, and a vertical through hole is arranged at the center of the slag ladle. The spiral deslagging ladle containing the gas is used for deslagging and exhausting cold materials, impurities, mixed gas and the like near a casting pouring opening, the flowing speed of the aluminum liquid cooling materials is slowed down through the design that the plane of the overflow channel is gradually changed into a curve, the movement track of the cold materials is changed through the design of the cone-shaped conical surface on the upper portion of the deslagging ladle, and the cooling effect is improved. And the cold material spirally flows downwards along the inner wall of the slag ladle, and a cavity is formed in the slag ladle, so that gas is separated out from the cold material, and gas retained near a casting sprue gate is discharged.

Description

Technical Field

[0001] The utility model relates to the field of die casting, in particular to a spiral slag discharge bag containing gas. Background Art

[0002] The slag discharge system is an important part of the die casting mold and die casting process, and the slag discharge bag is an important part of the slag discharge system. It is generally placed at the end of the casting feed and the cold material mixing place. The gas and impurities at the end of the casting feed enter the slag discharge bag through the slag discharge port. In addition, the intersection of several mainstream aluminum liquids is prone to produce cold materials and impurity gases, which also need to be discharged into the slag discharge bag through the slag discharge port to achieve a stable quality of casting products.

[0003] Some castings have special shapes. In order to better cast the internal and surface quality of the castings, a multi-gate casting method is required. In some cases, the product between the gates will produce aluminum liquid reflux or two streams of gate injection material will be mixed, which will cause the product to have air holes near the gates, soup backflow and other undesirable phenomena. In this case, it is generally adopted to add a slag discharge port to set a slag discharge bag so that the cold material, impurities and gas can be discharged from the overflow port into the slag discharge bag. Figure 1 As shown in the figure, since the overflow port is near the inlet gate and there are many sprues and runners at the gate, the slag bag only plays a role in slag removal, and the role in exhaust is minimal. Unless a high vacuum die-casting device is used, it is difficult for the casting to meet its technical indicators and quality requirements. Therefore, the quality problem caused by poor exhaust is a technical problem that needs to be solved. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, the utility model provides a spiral slag discharge bag containing gas, which can discharge slag and exhaust gas for the poured casting.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A spiral slag bag containing gas is arranged on the side of the slag discharge port of the casting, comprising a curved overflow channel and a slag bag, one end of the curved overflow channel is connected to the slag discharge port, and the other end is connected to the slag bag in a tangent shape, and a vertical through hole is provided at the center of the bottom of the slag bag.

[0007] As a preferred technical solution, the upper part of the slag bag is in a truncated cone shape, and the lower part is in a cylindrical shape, and the upper bottom size of the truncated cone is the same as the bottom size of the cylindrical shape.

[0008] As a preferred technical solution, a plurality of triangular teeth evenly distributed in the circumferential direction are fixed on the outer periphery of the lower bottom surface of the slag bag.

[0009] As a preferred technical solution, a top rod is provided in the through hole at the bottom of the slag ladle.

[0010] As a preferred technical solution, the shape of the curved overflow channel from the slag discharge port to the slag bag is a gradual curve with gradually increasing curvature.

[0011] As a preferred technical solution, the curved overflow channel includes two overflow channels.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model discloses a spiral slag discharge bag containing gas, which is used for discharging slag and exhausting cold material, impurities, mixed gas and the like near the pouring port of a casting. The design of the overflow channel plane gradually becoming a curve slows down the flow rate of the cold material of the molten aluminum. The truncated cone surface design on the upper part of the slag bag changes the movement trajectory of the cold material, so that the cold material flows downward in a spiral along the inner wall of the slag bag, forming cavities inside so that the gas can be precipitated from the cold material, thereby discharging the gas retained near the pouring port of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the installation structure of the existing slag discharge bag;

[0015] Figure 2 It is a schematic structural diagram of a spiral slag discharge bag containing gas of the utility model;

[0016] Figure 3 It is a motion trajectory diagram of aluminum liquid in the spiral slag discharge bag containing gas of the utility model;

[0017] Figure 4 It is a top view of the spiral slag discharge bag containing gas of the utility model.

[0018] In the figure: 1. Curved overflow channel; 2. Slag bag; 21. Upper part; 22. Lower part; 23. Triangular teeth; 3. Casting. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described below in conjunction with specific implementation methods:

[0020] like Figure 2 As shown, a spiral slag bag containing gas, the casting 3 is formed by cavity casting and is arranged on the side of the slag discharge port of the casting 3, including a curved overflow channel 1 and a slag bag 2, one end of the curved overflow channel 1 is connected to the slag discharge port, and the other end is connected to the slag bag 2 in a tangent shape, and a vertical through hole is provided at the bottom center of the slag bag 2, and the through hole is in contact with the external standard atmosphere.

[0021] The casting 3 is formed by cavity casting, and the spiral slag bag is located near the pouring port. After casting, there will generally be cold material, quality and gas near the pouring port. Due to the limitation of the slag bag position arrangement, the slag bag on the mold has no exhaust channel designed on the mold parting surface, and the gas must be contained inside the slag bag. Figure 1 As shown, during the pouring process of the casting 3, the molten aluminum is steadily pushed forward from the pouring gate, first the molten aluminum flows forward, and after the rear end of the mid-term casting 3 is filled, the molten aluminum flows back to the vicinity of the pouring gate, and finally enters the overflow channel from the slag discharge port.

[0022] like Figure 3 As shown, the upper part 21 of the slag ladle 2 is truncated cone-shaped, and the lower part 22 is cylindrical, and the upper bottom size of the truncated cone is the same as the bottom size of the cylindrical shape. The truncated cone-shaped conical surface of the upper part 21 of the slag ladle 2 can hinder the direct downward movement trajectory of the cold material, so that the cold material is injected into the slag ladle 2 in a spiral shape, and forms a flow track of rotating movement along the inner wall of the cylinder in the lower part 22 cylinder.

[0023] The outer wall of the slag bag 2 forms a rotating liquid flow, and the internal gas gathers to form a cylindrical cavity. As the aluminum liquid cools, impurities and gas continue to flow in, and the cold material and impurities rotate to form the cylindrical wall of the slag bag 2, and the gas precipitates from the cold material and enters the internal cavity.

[0024] Through simulation analysis, the gas pressure in the cavity of slag bag 2 reaches about 3 bar, which is enough to meet the discharge of the gas trapped near the pouring mouth of casting 3.

[0025] like Figure 4 As shown, the shape of the curved overflow channel 1 from the slag discharge port to the slag bag 2 is a gradual curve with gradually increasing curvature. After the aluminum liquid enters the overflow channel, the flow rate of the curve with a small curvature of the overflow channel is faster, and the flow rate of the curve with a large curvature is relatively slow, so the flow rate of the aluminum liquid gradually slows down.

[0026] The curved overflow channel 1 comprises two overflow channels.

[0027] A plurality of triangular teeth 23 evenly distributed in the circumferential direction are fixed on the outer periphery of the bottom surface of the lower portion 22 of the slag ladle 2 .

[0028] A push rod is provided in the through hole at the bottom of the slag bag 2 to facilitate the ejection of the slag bag 2. After pouring, the mold is opened, and the triangular teeth 23 of the movable mold push rod keep the slag bag 2 attached to the movable mold. After ejection, the casting 3 is taken out, and the die casting process is successfully completed.

[0029] After testing, it is found that the spiral slag discharge bag of the utility model has smooth exhaust and the quality of the casting 3 meets the technical requirements.

[0030] This embodiment is only a further explanation of the utility model, not a limitation of the utility model. After reading this specification, those skilled in the art can make non-creative modifications to the embodiment as needed, but as long as it is within the scope of the claims created by the utility model, it will be protected by the patent law.

Claims

1. A spiral slag discharge bag containing gas, arranged at the edge of the slag discharge port of the casting, characterized in that: It comprises a curved overflow channel and a slag bag, wherein one end of the curved overflow channel is connected to the slag discharge port, and the other end is connected to the slag bag in a tangent shape, and a vertical through hole is arranged at the bottom center of the slag bag.

2. The spiral slag discharge bag containing gas according to claim 1, characterized in that: The upper part of the slag bag is in a truncated cone shape, and the lower part is in a cylindrical shape. The upper bottom size of the truncated cone is the same as the bottom size of the cylindrical shape.

3. The spiral slag discharge bag containing gas according to claim 2, characterized in that: A plurality of triangular teeth evenly distributed in the circumferential direction are fixed on the outer periphery of the bottom surface of the lower part of the slag bag.

4. The spiral slag discharge bag containing gas according to claim 1, characterized in that: A top rod is arranged in the through hole at the bottom of the slag bag.

5. The spiral slag discharge bag containing gas according to claim 1, characterized in that: The shape of the curved overflow channel from the slag discharge port to the slag bag is a gradual curve with gradually increasing curvature.

6. The spiral slag discharge bag containing gas according to claim 1, characterized in that: The curved overflow channel includes two overflow channels.

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