Spherical riser application mold for enhancing feeding efficiency

Abstract

The utility model discloses a spherical riser application mould for strengthening feeding efficiency, which comprises a mould template, a pouring cup is arranged on the mould template, a pouring gate and a casting cavity are arranged in the mould template, the pouring cup is communicated with the casting cavity through the pouring gate, a spherical riser is arranged at the top of the casting cavity, and the spherical riser is arranged in the casting cavity. The spherical riser is communicated with the pouring gate, and a boss cavity is formed in the top of the spherical riser; the boss cavity is cylindrical, the top of the boss cavity is hemispherical, the diameter of the boss cavity is 1 / 4 to 1 / 3 of the diameter of the spherical riser, and the height of the boss cavity is 1 / 3 to 1 / 2 of the height of the spherical riser. A contracted pipe is easily formed at the position of the boss cavity, the contracted pipe can penetrate into the spherical riser, the feeding amount of a casting can be effectively increased, the feeding efficiency of the spherical riser is improved, and therefore the shrinkage porosity defect of the casting is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of casting molds, in particular to a spherical riser application mold with enhanced shrinkage feeding efficiency. Background Art

[0002] In vertical green sand casting, spherical risers have been widely used for shrinkage feeding due to their high efficiency. However, in actual production applications, although the theoretical feeding capacity of the risers is sufficient, the actual castings may still have shrinkage. Further improvements are needed to the spherical riser structure in the mold to improve the casting defects.

[0003] Publication No. CN219233895U discloses a lightweight bracket casting structure comprising a casting body, including a vertically positioned horn, a hot spot, and a spherical riser. The top of the casting body is a machined surface, and the spherical riser is located on the machined surface. The spherical riser design provides excellent shrinkage compensation, effectively preventing shrinkage at the hot spot and reducing scrap rates.

[0004] In actual production, a QT450 gear casting only uses a spherical riser, and the casting has shrinkage defects.

[0005] Publication number CN108772537A discloses an air-insulated ball riser, comprising a spherical riser and a riser neck disposed at the bottom of the spherical riser. The spherical riser has an air outlet at the top end, distal from the riser neck. At least one air barrier is provided between the inner and outer walls of the spherical riser. The air barrier is isolated from the atmosphere. Compared to conventional risers, this air-insulated ball riser is 10%-15% lighter, thereby reducing the production cost of sand mold ball risers, lowering the thermal conductivity of the sand mold, and increasing the shrinkage feeding efficiency of the ball riser by 10%, thereby improving the process yield of castings.

[0006] The prior art belongs to an open riser, and further improves the spherical riser shape; the utility model belongs to a concealed riser, and the improvement method is different from that of the prior art.

[0007] In short, the technical solutions of the above-disclosed technologies, the technical problems to be solved and the beneficial effects produced are all different from those of the present utility model. Regarding the more technical features, technical problems to be solved and the beneficial effects of the present utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0008] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a spherical riser application mold with enhanced shrinkage feeding efficiency.

[0009] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0010] A spherical riser application mold for enhancing shrinkage compensation efficiency includes a mold plate, a pouring cup is provided on the mold plate, a runner and a casting cavity are provided in the mold plate, the pouring cup is connected to the casting cavity through the runner, a spherical riser is provided on the top of the casting cavity, and the spherical riser is connected to the runner. It is characterized in that a boss cavity is provided on the top of the spherical riser; the boss cavity is cylindrical in shape, the top of the boss cavity is hemispherical, the diameter of the boss cavity is one-quarter to one-third of the diameter of the spherical riser, and the height of the boss cavity is one-third to one-half of the height of the spherical riser.

[0011] Furthermore, the runner includes a connected horizontal runner and a vertical runner, one horizontal runner is provided, and the number of the vertical runners is the same as the number of the casting cavities;

[0012] Specifically, the vertical runner is connected to the spherical riser, the vertical runner is connected to the lower half of the casting cavity through an ingate, and a slag collecting trough is provided at the bottom of the vertical runner.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model can easily form a shrinkage tube at the boss cavity position, and the shrinkage tube can pass through the inside of the spherical riser, which can effectively increase the shrinkage compensation amount of the casting and improve the shrinkage compensation efficiency of the spherical riser, thereby improving the shrinkage defects of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a spherical riser application mold for enhancing shrinkage feeding efficiency.

[0016] In the figure: 1. Mold plate; 2. Sprue cup; 3. Horizontal runner; 4. Vertical runner; 5. Ingate; 6. Casting cavity; 7. Spherical riser; 8. Boss cavity. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1The utility model provides a spherical riser application mold for enhancing shrinkage compensation efficiency, including a mold plate 1, a pouring cup 2 is provided on the mold plate 1, a runner and a casting cavity 6 are provided in the mold plate 1, the pouring cup 2 is connected with the casting cavity 6 through the runner, a spherical riser 7 is provided on the top of the casting cavity 6, the spherical riser 7 is connected with the runner, a boss cavity 8 is provided on the top of the spherical riser 7, the boss cavity 8 is cylindrical in shape, the top of the boss cavity 8 is hemispherical, the diameter of the boss cavity 8 is one-quarter to one-third of the diameter of the spherical riser 6, the height of the boss cavity 8 is one-third to one-half of the height of the spherical riser 6, and the height of the boss cavity 8 is adjusted according to the size of the shrinkage defect of the casting.

[0019] During production, a shrinkage tube can be easily formed at the boss cavity 8, which can penetrate into the spherical riser 7, effectively increasing the shrinkage compensation amount of the casting and improving the shrinkage compensation efficiency of the spherical riser 7, thereby improving the shrinkage defects of the casting.

[0020] Specifically, a QT450 gear casting only uses a spherical riser 7, and the casting has a shrinkage defect. By adding a boss cavity 8 on the top of the spherical riser 7, the shrinkage defect of the casting is solved.

[0021] Among them, the runner includes a connected horizontal runner 3 and a vertical runner 4. The horizontal runner 3 is provided with one, and the number of the vertical runners 4 is the same as the number of the casting cavity 6. The vertical runner 4 is connected to the spherical riser 7. The vertical runner 4 is connected to the lower half of the casting cavity 6 through the inner gate 5. A slag collecting trough is provided at the bottom of the vertical runner 4.

[0022] In this embodiment, two casting cavities 6 are provided, and there are also two vertical runners 4, spherical risers 7, and boss cavities 8 associated with the casting cavities 6.

[0023] All components not discussed in detail in this application and the connection methods of the components in this application are well-known technologies in the technical field and can be directly applied without further explanation.

[0024] In this utility model, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0025] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying 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 unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0026] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A spherical riser application mold for enhancing shrinkage feeding efficiency, comprising a mold plate, a pouring cup provided on the mold plate, a runner and a casting cavity provided within the mold plate, the pouring cup communicating with the casting cavity via the runner, a spherical riser provided on the top of the casting cavity, the spherical riser communicating with the runner, characterized in that: A boss cavity is provided on the top of the spherical riser; The boss cavity is cylindrical in shape, the top of the boss cavity is hemispherical, the diameter of the boss cavity is one quarter to one third of the diameter of the spherical riser, and the height of the boss cavity is one third to one half of the height of the spherical riser.

2. A spherical riser application mold for enhancing feeding efficiency according to claim 1, characterized in that: The runner includes a connected horizontal runner and a vertical runner, one horizontal runner is provided, and the number of the vertical runners is the same as the number of the casting cavities; The vertical pouring channel is communicated with the spherical riser, and the vertical pouring channel is communicated with the lower half of the casting cavity through the ingates, and a slag collecting trough is provided at the bottom of the vertical pouring channel.

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