A pouring system for large castings

Abstract

The present application discloses a pouring system for large castings, including: a pouring cup for conveying molten metal, a pouring runner assembly being installed at the lower end of the pouring cup; and several groups of slag collecting devices for collecting metal slag. The pouring system for large castings of the present invention adopts a multi-level slag collecting bag structure. After the molten metal rushes into the entgate from the straight runner, it passes through the first-level slag collecting bag, and most of the metal slag is blocked here. After the excess metal slag passes through the subsequent multi-level slag collecting bags, the metal slag is blocked in the slag collecting bag. The metal slag will not enter the interior of the casting with the molten metal, and will not form casting defects. The quality of the manufactured product is better. The entgate has different heights, and the molten metal moves along the entgate and the slag collecting bag in a curved manner, which reduces the direct impact of the molten metal on the entgate, making the molten metal flow smoothly. The trumpet-shaped entgate reduces the splashing of the molten metal, prevents the occurrence of casting defects, further improves the quality of the product, and brings better prospects for use.

Description

Technical Field

[0001] The invention relates to the field of casting pouring, and in particular to a pouring system for large castings. Background Art

[0002] At present, there are many orders for the production of large cylinder blocks for ship power. Due to the use of traditional casting methods, the casting process will cause molten iron splashing and large temperature differences in the molten iron filling mold, which can easily cause defects such as sand explosion and pores, resulting in the scrapping of castings;

[0003] The existing pouring system for large castings is a single-stage slag collection structure, which has certain disadvantages when used. When pouring the existing pouring system for large castings, after the molten metal rushes into the ingrown from the straight runner, the metal slag floating on the top of the liquid surface is concentrated in the slag collection bag. When the slag collection bag is full, the slag can no longer be collected. The metal slag will enter the interior of the casting with the molten metal to form casting defects. Moreover, the ingrown of the existing pouring system for large castings is too straight, the molten metal pouring process cannot be stable, the flow rate is too fast, a jet of molten metal is formed at the ingrown, metal splashes are generated, and casting defects are formed inside the casting, which cannot meet people's requirements. For this reason, we propose a pouring system for large castings. Summary of the invention

[0004] The main purpose of the present invention is to provide a pouring system for large castings, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A pouring system for large castings, comprising:

[0007] A pouring cup for conveying molten metal, a pouring channel assembly being installed at the lower end of the pouring cup; and

[0008] Several groups of slag collecting devices for collecting metal slag are provided, wherein the slag collecting devices are connected to the pouring cup through a runner assembly, and the slag collecting devices include several groups of slag collecting bags, wherein the several groups of slag collecting bags are connected to each other, and the slag collecting bags in the slag collecting devices away from the pouring cup are connected to the casting.

[0009] Preferably, the runner assembly includes a cross runner and several groups of straight runners connected to the cross runner, the pouring cup is welded to the middle position of the upper outer surface of the cross runner, and the upper outer surfaces of several groups of straight runners are installed on the lower outer surface of the cross runner.

[0010] Preferably, the middle position of the outer surface of the sprue is connected to the slag collecting bag near the pouring cup through a pipeline.

[0011] Preferably, adjacent slag collecting ladles are provided with inner runners for connecting the slag collecting ladles, and the heights of two adjacent groups of the inner runners are different.

[0012] Preferably, an inner gate is provided on the slag collecting bag far away from the pouring cup in the slag collecting device, the inner gate is communicated with the inner cavity of the casting, and the shape of the inner gate is trumpet-shaped.

[0013] Preferably, the cross-sectional dimension of the runner near the pouring cup is larger than the cross-sectional dimension far from the pouring cup.

[0014] Compared with the prior art, the present invention provides a pouring system for large castings, which has the following beneficial effects:

[0015] 1. The pouring system of the present invention adopts a multi-level slag collection bag structure. After the molten metal rushes into the ingrown from the sprue, it passes through the first-level slag collection bag, and most of the metal slag is blocked here. After the excess metal slag passes through the subsequent multi-level slag collection bags, the metal slag is blocked in the slag collection bag. The metal slag will not enter the interior of the casting with the molten metal, and will not form casting defects. The quality of the manufactured product is better;

[0016] 2. The ingates in the pouring system of the present invention have different heights. The molten metal moves along the ingates and the slag bag in a curved manner, which reduces the direct impact of the molten metal on the ingates and makes the molten metal flow smoothly. The trumpet-shaped ingates reduce the splashing of the molten metal and prevent the occurrence of casting defects, thereby further improving the quality of the product. In addition, the entire workpiece translation device has a simple structure, low cost, good use effect, can be used in large-scale production, and is more practical.

[0017] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a pouring system for a large casting of the present invention;

[0019] Figure 2 This is a partial structural diagram of a pouring system for a large casting according to the present invention.

[0020] In the figure: 1. pouring cup; 2. horizontal runner; 3. ingode; 4. straight runner; 5. casting; 6. ingode; 7. slag bag. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] A gating system for large castings, such as Figure 1-2 As shown, including:

[0024] A pouring cup 1 for conveying molten metal, a pouring channel assembly being installed at the lower end of the pouring cup 1; and

[0025] Several groups of slag collecting devices are used to collect metal slag, and the slag collecting devices are connected to the pouring cup 1 through the runner assembly. The slag collecting devices include several groups of slag collecting bags 7, and the several groups of slag collecting bags 7 are connected to each other. The slag collecting bags 7 in the slag collecting devices far away from the pouring cup 1 are connected to the casting 5.

[0026] The number of the slag collecting bags 7 in the slag collecting device is preferably 3 groups, and the 3 groups of slag collecting bags 7 cooperate with the metal slag to be basically blocked in the slag collecting bags 7 .

[0027] The runner assembly includes a cross runner 2 and several groups of straight runners 4 connected to the cross runner 2. The pouring cup 1 is welded to the middle position of the upper outer surface of the cross runner 2, and the upper outer surfaces of the several groups of straight runners 4 are all installed on the lower outer surface of the cross runner 2.

[0028] The middle position of the outer surface of the sprue 4 is connected to the slag collecting bag 7 close to the pouring cup 1 through a pipeline.

[0029] Ingates 3 for connecting the slag collecting ladles 7 are arranged between adjacent slag collecting ladles 7 , and the heights of two adjacent groups of ingates 3 are different.

[0030] Two adjacent groups of ingates 3 can be arranged at different heights, one group is located at the top end of the slag collecting bag 7 , and the other group is located at the bottom end of the slag collecting bag 7 .

[0031] An inner gate 6 is provided on a slag collecting bag 7 far away from the pouring cup 1 in the slag collecting device. The inner gate 6 is communicated with the inner cavity of the casting 5 and has a trumpet shape.

[0032] The cross-sectional dimension of the runner 2 near the pouring cup 1 is greater than the cross-sectional dimension of the runner 2 far from the pouring cup 1 .

[0033] It should be noted that the present invention is a pouring system for large castings. When in use, the molten metal enters the runner 2 from the pouring cup 1, is dispersed into a plurality of groups of sprues 4, and is rushed into the slag collecting bag 7 through the sprue 4. After moving through the ingates 3 between the slag collecting bags 7, the metal slag floating on the top of the liquid surface is concentrated in the slag collecting bag 7, and the molten metal enters the casting 5 through the ingates 6 to be formed.

[0034] The pouring system of the present invention adopts a multi-stage slag collecting bag structure. After the molten metal rushes into the ingode 3 from the sprue 4, it passes through the first-stage slag collecting bag 7, and most of the metal slag is blocked here. After the excess metal slag passes through the subsequent multi-stage slag collecting bags 7, the metal slag is blocked in the slag collecting bags 7. The metal slag will not enter the interior of the casting 5 with the molten metal, and will not form casting defects. The quality of the manufactured product is better.

[0035] The ingates 3 in the pouring system of the present invention have different heights, and the molten metal moves along the ingates 3 and the slag collecting bag 7 in a curved manner, which reduces the direct impact of the molten metal on the ingates 6 and makes the molten metal flow smoothly. The trumpet-shaped ingates 6 reduce the splashing of the molten metal and prevent the defects of large castings, thereby further improving the quality of the product. In addition, the entire workpiece translation device has a simple structure, low cost, good use effect, can be used in large-scale production, and is more practical.

[0036] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pouring system for large castings, characterized in that: include: A pouring cup (1) for conveying molten metal, wherein a pouring channel assembly is installed at the lower end of the pouring cup (1); as well as A plurality of slag collecting devices for collecting metal slag, the slag collecting devices being connected to the pouring cup (1) through a pouring channel assembly, the slag collecting devices comprising a plurality of slag collecting bags (7), the plurality of slag collecting bags (7) being connected to each other, and the slag collecting bags (7) in the slag collecting devices that are far from the pouring cup (1) being connected to the casting (5); The runner assembly comprises a runner (2) and a plurality of groups of straight runners (4) connected to the runner (2); the pouring cup (1) is welded to the middle position of the upper outer surface of the runner (2); and the upper outer surfaces of the plurality of groups of straight runners (4) are all mounted on the lower outer surface of the runner (2); Ingates (3) for connecting the slag collecting ladles (7) are arranged between adjacent slag collecting ladles (7), and the heights of two adjacent groups of ingates (3) are different.

2. A pouring system for large castings according to claim 1, characterized in that: The middle position of the outer surface of the sprue (4) is connected to the slag collecting bag (7) close to the pouring cup (1) through a pipeline.

3. A pouring system for large castings according to claim 1, characterized in that: An inner gate (6) is provided on a slag collecting bag (7) in the slag collecting device far away from the pouring cup (1); the inner gate (6) is communicated with the inner cavity of the casting (5); and the shape of the inner gate (6) is trumpet-shaped.

4. A pouring system for large castings according to claim 1, characterized in that: The cross-sectional dimension of the runner (2) at a position close to the pouring cup (1) is greater than the cross-sectional dimension at a position far from the pouring cup (1).

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