Straight pouring gate slag stopping structure

Abstract

The utility model discloses a sprue slag stopping structure which comprises a sprue (2) and a sprue base (1), and the cross section of the sprue (2) and the cross section of the sprue base (1) are both circular. The circular diameter of the sprue (2) is smaller than that of the sprue base (1); the circle center of the circle of the sprue (2) and the circle center of the circle of the sprue base (1) are deviated by a certain distance; and the circle of the sprue (2) is within the range of the circle of the sprue base (1). By the adoption of the technical scheme, the sprue deviates towards the pouring side relative to the center of the base, under the condition that the arrangement position of castings and a pouring ladle nozzle are not changed, through deviation of the sprue, it is guaranteed that the smooth pouring effect is achieved, it is guaranteed that the pouring position meets the requirement, the cold shut rejection rate is reduced, the castings and the qualified rate are improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of gating system structures in casting production. More specifically, this utility model relates to a slag-blocking structure for a sprue. Background Technology

[0002] like Figure 1 As shown, in the casting production process, the sprue is an important component connecting the molten metal inlet and the sand mold. However, when the molten metal flows through the bottom of the sprue, a ceramic filter is needed to prevent slag formation. The ceramic filter is typically 60-90mm in size. In the production of large castings in existing hydrostatic lines, the casting occupies a large portion of the mold plate on certain casting plates. Because the sprue is located far from the pouring side, flow interruption occurs during pouring.

[0003] Using keywords such as "direct casting channel; base; slag barrier," a search was conducted on existing publicly available technical documents, yielding the following results:

[0004] 1. Chinese patent document: "A small-mass casting fully enclosed edge-pressing casting equipment and process", patent (application) number: 202211458147.6; the technical solution described therein is:

[0005] "The small-mass casting full-core pressing edge casting equipment includes a pouring cup, the bottom of which is connected to a sprue, the sprue is connected to a pouring cup base, the pouring cup base is installed on a pouring socket, a main sprue is installed on the pouring socket, a mud core is installed on the main sprue, Y-shaped test blocks are installed on both sides of the pouring socket, and risers are installed on the Y-shaped test blocks."

[0006] The technical effects described are:

[0007] "To prevent gas from being trapped and causing porosity, two Y-shaped test blocks are used for counterweighting, and the casting is directly pressed and molded through a hot riser. This method has good feeding efficiency, high yield, and can effectively reduce sand erosion, sand hole defects, and grinding workload. It also solves the problem that existing gating systems generate a large amount of gas during casting, which can easily cause porosity inside the casting and requires grinding after casting."

[0008] 2. Chinese patent document: "A casting system for a thick-walled hydraulic cylinder", patent (application) number: 202210494081.X; the technical solution described therein is:

[0009] The pouring system of the thick and large oil cylinder comprises a casting, a straight sprue, a bottom layer cross sprue, a filter sheet, a bottom layer inner sprue, a connecting pipeline, an upper layer cross sprue and an upper layer inner sprue; the upper layer cross sprue and the bottom layer cross sprue are connected through the connecting pipeline; the upper layer cross sprue is connected with the upper layer inner sprue, and the top of the casting is connected with the upper layer inner sprue; the bottom layer cross sprue is connected with the bottom layer inner sprue, and the bottom of the casting is connected with the bottom layer inner sprue; the filter sheet is arranged at the bottom of the bottom layer cross sprue, and the straight sprue is fixedly arranged on the bottom layer cross sprue.

[0010] The technical effect recorded is:

[0011] The filter sheet ensures that slag cannot enter the cavity, so that the appearance of the casting is defect-free; the pouring mode combining the base with the top pouring ensures uniform temperature after pouring, so that the self-compacting ability of the casting is ensured, and the casting is free of internal defects such as shrinkage porosity; the upper and lower cross sprues are connected together through the connecting pipeline, so that there is only one straight sprue, and the operation is simple during pouring.

[0012] However, the technical solution recorded in the above technical document and the existing related technical solution in the prior art cannot solve the problem and defects of "flow interruption during pouring" in the prior art. Practical new type content

[0013] The utility model provides a straight sprue slag retaining structure, and the purpose is to ensure smooth pouring.

[0014] In order to realize the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0015] The straight sprue slag retaining structure of the utility model is applied to continuous casting production process, and it comprises a straight sprue and a straight sprue base, the shape of the cross section of the straight sprue and the straight sprue base is circular; the diameter of the straight sprue is smaller than the diameter of the straight sprue base; the center of the circular shape of the straight sprue is offset from the center of the circular shape of the straight sprue base by a distance; and the circular shape of the straight sprue is within the range of the circular shape of the straight sprue base.

[0016] The center of the circular shape of the straight sprue is offset to the pouring side relative to the center of the circular shape of the straight sprue base.

[0017] The circular shape of the straight sprue is inscribed in the circular shape of the straight sprue base.

[0018] The lower part of the straight sprue base is provided with a sprue nest; and the straight sprue base is connected with the cross sprue through the sprue nest.

[0019] A filter screen is arranged on the straight sprue base.

[0020] The filter screen is arranged above the cross sprue.

[0021] The size of the filter screen is 60-90mm.

[0022] The utility model discloses the above technical scheme, through with the straight runner relative to the center of base deviates from the pouring side, in the case that does not change the arrangement position of casting and pouring nozzle, through the offset of straight runner, guarantee to get the effect of pouring smoothly, guarantee pouring position to reach the requirement, reduce the cold separation scrap rate, and the casting and the qualified rate improve, and the production cost reduces. BRIEF DESCRIPTION OF DRAWINGS

[0023] The contents shown in the drawings and the marks in the drawings are briefly explained as follows:

[0024] Figure 1 It is a structural schematic diagram of the prior art;

[0025] Figure 2 It is a structural schematic diagram of the utility model.

[0026] The marks in the drawings are:

[0027] 1, straight runner base, 2, straight runner, 3, filter screen, 4, runner nest, 5, cross runner. DETAILED DESCRIPTION

[0028] The specific embodiments of the utility model are further explained in detail below by comparing the drawings and the description of the embodiments, to help the technical personnel in the field to have more complete, accurate and in-depth understanding of the inventive concept and technical scheme of the utility model.

[0029] As Figure 2 The utility model discloses a structure of eccentric straight runner slag stop, be applied to continuous casting production process, and it includes straight runner 2 and straight runner base 1, the shape of the cross section of straight runner 2 and straight runner base 1 is circular;The circular diameter of straight runner 2 is less than the circular diameter of straight runner base 1.

[0030] In order to solve the problems existing in the prior art and overcome its defects, realize the invention purpose of guaranteeing pouring smoothly, the technical scheme adopted by the utility model is:

[0031] As Figure 2 The utility model discloses a straight runner slag stop structure, and the center of the circle of straight runner 2 is offset a distance from the center of the circle of straight runner base 1;And the circle of straight runner 2 is within the range of the circle of straight runner base 1.

[0032] The straight runner is offset in the structure, and the pouring position meets the requirement. In the case that the arrangement position of casting and pouring nozzle is not changed, the offset of straight runner guarantees the effect of pouring smoothly.

[0033] The center of the circle of straight runner 2 is deviated to the pouring side relative to the center of the circle of straight runner base 1.

[0034] The sprue 2 circle is inscribed in the sprue base 1 circle.

[0035] In view of the phenomenon of the prior art's slag blocking and flow interruption, the utility model adopts eccentric filter slag blocking structure, by changing the outer diameter of the sprue and the outer diameter of the base into an inscribed circle, so that the sprue is deviated from the center of the base to the pouring side, ensuring smooth pouring.

[0036] The lower part of the sprue base 1 is provided with a sprue nest 4, and the sprue base 1 is connected with the cross sprue 5 through the sprue nest 4.

[0037] The structure adopted by the utility model is as follows:

[0038] The sprue base 1 is provided with a filter screen 3.

[0039] The filter screen 3 is arranged above the cross sprue 5.

[0040] The specific size is as follows:

[0041] The size of the filter screen 3 is 60-90mm.

[0042] The above technical scheme of the utility model ensures smooth pouring, reduces cold shut waste, improves the casting and qualified rate, and reduces the production cost.

[0043] The utility model is described above in combination with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode, as long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model, or the concept and technical scheme of the utility model is directly applied to other occasions without improvement, which are all within the protection scope of the utility model.

Claims

1. A slag-blocking structure for a sprue, applied in continuous casting production process, comprising a sprue (2) and a sprue base (1), wherein the cross-sectional shape of both the sprue (2) and the sprue base (1) is circular; the circular diameter of the sprue (2) is smaller than the circular diameter of the sprue base (1); characterized in that: The center of the circle of the sprue (2) is offset from the center of the circle of the sprue base (1) by a certain distance; and the circle of the sprue (2) is within the range of the circle of the sprue base (1).

2. The slag-blocking structure for the direct casting channel according to claim 1, characterized in that: The circular center of the sprue (2) is offset toward the pouring side relative to the circular center of the sprue base (1).

3. The slag-blocking structure for the direct casting channel according to claim 1, characterized in that: The circular sprue (2) is internally tangent to the circular sprue base (1).

4. The slag-blocking structure for the direct casting channel according to claim 1, characterized in that: The lower part of the straight sprue base (1) is provided with a sprue recess (4); the straight sprue base (1) is connected to the horizontal sprue (5) through the sprue recess (4).

5. The slag-blocking structure for the direct casting channel according to claim 4, characterized in that: A filter screen (3) is provided on the base (1) of the direct pouring channel.

6. The slag-blocking structure for the direct casting channel according to claim 5, characterized in that: The filter screen (3) is positioned above the horizontal runner (5).

7. The slag-blocking structure for the direct casting channel according to claim 5, characterized in that: The size of the filter screen (3) is 60-90mm.

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