Pouring basin structure and casting method

Abstract

The invention discloses a pouring basin structure and a casting method. The pouring basin structure comprises a pouring cup and a liquid collecting ring, and a plurality of exhaust runners distributed in the radial direction are formed in the lower portion of the pouring cup; the pouring cup is assembled in the connector of the liquid collecting ring, so that a liquid collecting groove is formed between the pouring cup and the liquid collecting ring; and the output port of each exhaust runner corresponds to the liquid collecting tank in position. The pouring cup and the liquid collecting ring are modularly combined, and a plurality of exhaust runners are formed in the pouring cup, so that molten metal exhaust in the casting process can be improved, the use amount of molten metal is reduced, and the yield is increased.

Description

Technical Field

[0001] The present invention relates to the field of casting technology, and more particularly to a sprue basin structure and a casting method. Background Art

[0002] Sand casting is a casting method used to manufacture metal castings, and its design plays a crucial role in the quality and performance of castings. In sand casting, the sprue basin is an essential part, which undertakes the important task of guiding the molten metal into the mold cavity.

[0003] However, the existing sprue basins have the following defects:

[0004] 1) Low yield: The volume of the sprue basin (such as funnel-shaped, basin-shaped) is redundantly designed, resulting in excessive consumption of molten metal and low yield, especially for small castings.

[0005] 2) Frequent process defects: Severe gas entrapment and poor exhaust lead to casting defects, indirectly affecting the yield.

[0006] Therefore, providing a sprue basin structure and a casting method with high yield is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0007] In view of this, the present invention provides a sprue basin structure and a casting method, which improve the yield and enhance the quality and stability of castings.

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

[0009] A sprue basin structure includes a sprue cup and a liquid collecting ring. The lower part of the sprue cup has a plurality of exhaust channels distributed radially; the sprue cup is assembled in the interface of the liquid collecting ring to form a liquid collecting groove between the sprue cup and the liquid collecting ring; the output port of each exhaust channel corresponds to the position of the liquid collecting groove.

[0010] By adopting the above technical solutions, the present invention has the following beneficial effects:

[0011] Through the modular combination of the sprue cup and the liquid collecting ring, and by opening a plurality of exhaust channels on the sprue cup, it can improve the exhaust of molten metal during the casting process, reduce the amount of molten metal used, and increase the yield.

[0012] Further, the sprue cup is funnel-shaped.

[0013] Further, the inside of the sprue cup has a tapered hole and a cylindrical hole that are connected from top to bottom; the plurality of exhaust channels are evenly arranged along the circumference of the cylindrical hole.

[0014] Further, the number of the exhaust channels is six, and the diameter of each exhaust channel is 8 mm.

[0015] Further, the pouring basin is in close contact with the interface of the collecting ring at the lower part below the exhaust channels.

[0016] The beneficial effect of adopting the above further technical solution is to ensure the sealing performance between the interface of the pouring basin and the collecting ring, and prevent the molten metal in the collecting tank from leaking out between the interface of the pouring basin and the collecting ring.

[0017] Further, each exhaust channel is at the same horizontal height as the collecting tank.

[0018] The beneficial effect of adopting the above further technical solution is to ensure that the molten metal flowing out of the exhaust channel directly flows into the collecting tank.

[0019] Further, each exhaust channel is inclined upward by 10-15° from the inside to the outside.

[0020] A casting method is carried out by using a pouring basin structure as described above, and includes the following steps:

[0021] The molten metal flows into the cavity of the sand mold through the pouring basin. When the cavity is filled, the molten metal flows back into the pouring basin from the cavity and flows out into the collecting tank through multiple exhaust channels. At this time, the casting is stopped.

[0022] By adopting the above technical solutions, the present invention has the following beneficial effects:

[0023] It not only meets the requirements for casting formation, but also can timely detect whether the cavity is filled with molten metal to reduce the consumption of molten metal. It can also discharge the gas generated during the casting process and improve the yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0025] Figure 1 The drawings are the overall structural schematic diagram of a pouring basin structure provided by the present invention;

[0026] Figure 2 The drawings are the exploded view of a pouring basin structure provided by the present invention;

[0027] Figure 3 The drawings are the structural schematic diagram of the pouring basin provided by the present invention;

[0028] Figure 4 The accompanying drawing is a cross-sectional view of the sprue cup provided by the present invention;

[0029] Figure 5 The accompanying drawing is a schematic structural view of the liquid collecting ring provided by the present invention;

[0030] Figure 6 The accompanying drawing is a schematic structural view of a sprue basin structure provided by the present invention during the casting process;

[0031] Figure 7 The accompanying drawing is a cross-sectional view of a sprue basin structure provided by the present invention during the casting process. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] As Figure 1-7 shown, the embodiment of the present invention discloses a sprue basin structure, which includes a sprue cup 1 and a liquid collecting ring 2. The lower part of the sprue cup 1 has a plurality of exhaust channels 11 distributed radially; the sprue cup 1 is assembled in the interface 21 of the liquid collecting ring 2 to form a liquid collecting groove 3 between the sprue cup 1 and the liquid collecting ring 2; the output ports of each exhaust channel 11 correspond to the position of the liquid collecting groove 3. On the one hand, the present invention can observe in advance whether the molten metal fills the cavity 41 of the sand mold 4, timely judge whether the casting is completed, avoid filling the sprue cup 1, save the molten metal in the sprue cup 1. For castings less than 50 kg, the molten metal in the sprue cup 1 is about 7.5 kg (calculated according to the density of cast steel parts), and the saving of this part can increase the casting yield by more than 5%; on the other hand, the plurality of radially distributed exhaust channels 11 can increase the exhaust area, help the gas to be discharged along a specific direction, and avoid turbulent flow.

[0034] Specifically, the sprue cup 1 is in a funnel shape; the inside of the sprue cup 1 has a tapered hole 101 and a cylindrical hole 102 that are connected from top to bottom; a plurality of exhaust channels 11 are uniformly arranged along the circumference of the cylindrical hole 102. In this embodiment, the number of exhaust channels 11 is 6, and the diameter of each exhaust channel 11 is 8 mm.

[0035] Specifically, the lower part of the sprue cup 1 below the exhaust channels 11 is in close contact with the interface 21 of the liquid collecting ring 2, so as to ensure the sealing between the interface 21 of the sprue cup 1 and the liquid collecting ring 2, and avoid the leakage of the molten metal in the liquid collecting groove 3 from between the interface 21 of the sprue cup 1 and the liquid collecting ring 2.

[0036] Specifically, each exhaust runner 11 is at the same horizontal height as the liquid collecting tank 3 to ensure that the molten metal flowing out of the exhaust runner 11 directly flows into the liquid collecting tank 3.

[0037] Specifically, each exhaust runner 11 slopes upward by 10-15° from the inside to the outside to prevent the molten metal from flowing into the liquid collecting tank 3 through the exhaust runner 11 when pouring.

[0038] The embodiment of the present invention also discloses a casting method, which is carried out by using the gating basin structure as described above, and includes the following steps:

[0039] The molten metal flows into the cavity 41 of the sand mold 4 through the pouring cup 1 (the bottom of the pouring cup 1 is aligned with the cavity 41). When it is found that the molten metal flows out of the exhaust runner 11 (when the cavity 41 is filled, the molten metal flows back into the pouring cup 1 from the cavity 41 and flows out into the liquid collecting tank 3 through multiple exhaust runners 11), casting can be stopped at this time.

[0040] The present invention can not only meet the requirements for casting forming, but also timely detect whether the cavity 41 is filled with molten metal to reduce the amount of molten metal used. It can also discharge the gas generated during the casting process and improve the yield.

[0041] It is worth noting that: the present invention is applicable to small castings (≤50 kg), especially suitable for gravity casting of metal materials such as cast steel, cast iron, and aluminum alloy.

[0042] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pouring basin structure, characterized in that: It includes a pouring cup and a liquid collecting ring, wherein the lower part of the pouring cup has a plurality of radially distributed exhaust channels; the pouring cup is assembled in the interface of the liquid collecting ring to form a liquid collecting tank between the pouring cup and the liquid collecting ring; the output port of each exhaust channel corresponds to the position of the liquid collecting tank.

2. A pouring basin structure according to claim 1, characterized in that: The pouring cup is funnel-shaped.

3. A pouring basin structure according to claim 2, characterized in that: The pouring cup has a conical hole and a cylindrical hole connected from top to bottom inside; and a plurality of exhaust flow channels are evenly arranged along the circumference of the cylindrical hole.

4. A pouring basin structure according to claim 3, characterized in that: The number of the exhaust flow channels is 6, and the diameter of each exhaust flow channel is 8 mm.

5. A pouring basin structure according to claim 1, characterized in that: The lower part of the pouring cup located below the exhaust flow channel is in close contact with the interface of the liquid collecting ring.

6. A pouring basin structure according to claim 1 or 5, characterized in that: Each of the exhaust flow channels is located at the same level as the liquid collecting tank.

7. A pouring basin structure according to claim 4, characterized in that: Each of the exhaust flow channels is inclined upward by 10-15 degrees from the inside to the outside.

8. A casting method, using a pouring basin structure as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: The molten metal flows into the sand mold cavity through the pouring cup. When the cavity is filled, the molten metal flows back from the cavity into the pouring cup, and flows out into the collecting tank through multiple exhaust flow channels. At this time, casting stops.

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