Mould for collecting molten iron sand clusters at inner pouring gate

Abstract

The utility model discloses a mold for collecting molten iron sand balls at a flow gate, which comprises a mold template, a pouring cup is arranged on the mold template, a main pouring gate is communicated below the pouring cup, a casting cavity is arranged in the mold template, the main pouring gate is communicated with the casting cavity through the flow gate, and the flow gate is horizontally arranged; a step structure is arranged on the bottom surface of the flow gate, and the angle between the step structure and the bottom surface of the flow gate is 45-90 degrees; and the step structure occupies 1 / 3 to 1 / 2 of the cross sectional area of the flow gate. The step structure is additionally arranged at the inner gate of the pouring system by utilizing the characteristic that sand balls are at the bottom layer of molten iron, and the sand balls in the pouring system are collected in the steps of the inner gate, so that the sand balls are prevented from entering a cavity along with the molten iron to form sand holes, and the sand hole defects of a casting are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of casting molds, in particular to a mold for collecting molten iron sand masses in an inner pouring gate. Background Art

[0002] Sand holes are one of the most common defects in green sand casting. Due to the strength of green sand, sand can easily fall out during the sand-mold extrusion process, entering the casting cavity through the gating system and causing sand holes. This defect often results in the casting being scrapped.

[0003] Announcement No. CN221289415U discloses a novel pouring structure for exhaust cover casting. The mold comprises an upper mold and a lower mold, with a cavity formed in the lower mold to match the casting's shape. Several upper mold sides are connected by a common runner, and filters are installed at the locations where the runners diverge. The runners include ingates, cross runners, and vertical runners. Two ingates are connected on either side of the horizontal runner, and the ingates extend through the cross runner with equal lengths at both ends. The same upper mold is fixed at both ends of the two ingates on the same side, and the top of the cross runner is connected to a vertical vertical runner. A semi-enclosed pouring system enables the cross runner to fill quickly, ensures smooth die punching, and provides excellent slag blocking, thus avoiding defects such as sand holes that are easily generated during die punching.

[0004] Publication No. CN114367637B discloses a high-strength green sand casting system for an extra-large traction wheel housing. The casting system includes a molding cavity contoured to the traction wheel housing, a hot riser for injecting molten iron into the molding cavity, several ingating water-inlet fins, several heating risers, and several auxiliary ingating water-inlet fins. The ingating fins of the hot riser are located at the mid-height of the front side panel. The auxiliary ingating water-inlet fins include a first set of auxiliary water-inlet fins connecting the thin-walled annular outer shell and the thin-walled annular inner shell, and a second set of auxiliary water-inlet fins connecting the thin-walled annular inner shell and the central axis cylinder. By shortening the casting filling path, the filling time is reduced, effectively solving the problems of sand holes and thermal node shrinkage.

[0005] The technical solutions for solving the problem of sand holes in the above-mentioned prior art are different from those of the present invention.

[0006] 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

[0007] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a mold that can collect molten iron sand masses in the inner gate.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A mold for collecting molten iron sand lumps at an ingate, comprising a mold plate, a pouring cup provided on the mold plate, a main runner connected below the pouring cup, a casting cavity provided in the mold plate, the main runner and the casting cavity connected via an ingate, the ingate being arranged horizontally; a step structure provided on the bottom surface of the ingate, the step structure being at an angle of 45°-90° to the bottom surface of the ingate; the step structure occupying one-third to one-half of the cross-sectional area of the ingate.

[0010] Preferably, the angle between the step structure and the bottom surface of the ingate is 90°.

[0011] Preferably, the angle between the step structure and the bottom surface of the ingate is 45°.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The utility model utilizes the characteristics of sand masses in the bottom layer of molten iron, adds a step structure at the gate of the casting system, collects the sand masses in the casting system in the gate step, avoids the sand masses from entering the mold cavity with the molten iron to form sand holes, and reduces the sand hole defects of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of a mold for collecting molten iron sand masses in an inner gate of the utility model;

[0015] Figure 2 It is a structural diagram of another embodiment of the present invention.

[0016] In the figure: 1. Ingate; 2. Step structure; 3. Molten iron; 4. Sand mass; 5. Casting. 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 mold for collecting molten iron sand balls in an inner gate, comprising a mold plate, a pouring cup is provided on the mold plate, a main runner is connected under the pouring cup, a casting cavity 5 is provided in the mold plate, the main runner is connected to the casting cavity 5 through an inner gate 1, the inner gate 1 is horizontally arranged, the cross section of the gate 1 is an inverted trapezoid, and a step structure 2 is provided on the bottom surface of the inner gate 1, and the step structure 2 occupies one third to one half of the cross-sectional area of the inner gate 1.

[0019] A larger step structure 2 is provided so that when the molten iron 3 flows through it, the sand clumps 4 in the molten iron 3 are retained on the step structure 2 due to the blocking effect of the step structure 2. In this way, the number of sand clumps in the molten iron flowing into the casting cavity 5 is reduced, thereby reducing the sand hole defects in the casting.

[0020] The step structure 2 also has the function of slowing down the flow rate of the molten iron 3 and reducing the impact of the molten iron 3, which can further improve the quality of the casting.

[0021] Among them, the main runner includes a vertical runner, a horizontal runner, etc. The main runner is a prior art and is not drawn in the figure. Its structure is known to those skilled in the art.

[0022] Specifically, the angle between the step structure 2 and the bottom surface of the ingate 1 is 45°-90°.

[0023] One implementation method of the present utility model is as follows Figure 1 The angle between the step structure 2 and the bottom surface of the inner gate 1 is 90 degrees, which is convenient for making the mold template.

[0024] Another embodiment of the present invention is as follows: Figure 2 The angle between the step structure 2 and the bottom surface of the ingates 1 is 45°, so that a cavity for accommodating sand balls 4 can be obtained; when the sand balls 4 fill the step structure 2 into a gentle slope, under the impact of the molten iron 3, the sand balls 4 will rush into the casting cavity 5 along the slope; the accommodating cavity of this embodiment can increase the rated sand retaining capacity of the step structure 2, and the sharp corners in the accommodating cavity can guide the position of the shrinkage cavity, further improving the quality of the casting.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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 mold for collecting molten iron sand in an ingate, comprising a mold plate, a pouring cup provided on the mold plate, a main runner connected below the pouring cup, a casting cavity provided in the mold plate, the main runner and the casting cavity connected through the ingate, characterized in that: The ingate is arranged horizontally; The bottom surface of the ingate is provided with a step structure, and the angle between the step structure and the bottom surface of the ingate is 45°-90°; The step structure occupies one third to one half of the cross-sectional area of the ingate.

2. A mold for collecting molten iron sand agglomerates in an ingate according to claim 1, characterized in that: The angle between the step structure and the bottom surface of the ingates is 90°.

3. The mold for collecting molten iron sand agglomerates in an ingate according to claim 1, characterized in that: The angle between the step structure and the bottom surface of the ingates is 45 degrees.

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