Lost foam casting smelting sand washing prevention pouring basin
By coating the inner wall of the lost foam casting gating basin with an alcohol-based coating and setting refractory bricks at the bottom of the basin, the problem of resin sand being washed away at the bottom of the gating basin was solved, thus improving the quality of the finished castings.
Patent Information
- Application Number
- CN202522479778.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-11-24
AI Technical Summary
In the lost foam casting process, the resin sand at the bottom of the pouring basin is easily washed away by the high-temperature molten iron, resulting in sand hole defects in the casting and affecting the quality of the casting.
An alcohol-based coating is applied to the inner wall of the pouring basin, and a refractory brick assembly is placed at the bottom of the basin. The refractory brick assembly is located at the point where molten iron is washed away, providing double protection to prevent the resin sand from being washed away by the high-temperature molten iron.
By combining alcohol-based coatings and refractory bricks for protection, the amount of sand inclusions entering the mold cavity is significantly reduced, improving the quality of the finished castings and avoiding sand hole defects.
Smart Images
Figure CN223833379U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of casting technology, and in particular to a lost foam casting smelting anti-sand pouring basin. Background Technology
[0002] In lost foam casting, the bottom of the pouring basin is usually filled with resin sand during molding. However, during the pouring process, the molten iron, which can reach temperatures as high as 1425°C, can easily wash away the resin sand in this area and allow it to flow into the mold cavity. This can lead to sand hole defects in the casting during subsequent unmolding or machining, reducing the overall quality of the casting.
[0003] Therefore, there is an urgent need to develop a high-temperature resistant and sand-resistant gating bowl suitable for lost foam casting, so as to effectively improve the quality of castings. Utility Model Content
[0004] In order to overcome the above-mentioned technical defects, this utility model provides a lost foam casting smelting anti-sand pouring basin to solve at least one of the technical problems existing in the background art.
[0005] This utility model provides the following technical solution: a lost foam casting smelting anti-impact sand pouring basin, including a basin wall 10 and a basin bottom 20 forming a space for containing molten iron. The basin bottom 20 is provided with several flow channels 21 that allow molten iron to flow out. The upper surface of the basin bottom 20 includes a resin sand layer, in which refractory bricks are embedded. The height of the refractory bricks is not less than the height of the resin sand layer. The inner surface of the basin wall 10 and / or the surface of the refractory bricks are coated with fireproof paint. The refractory bricks are located at the point where molten iron is impacted. The molten iron, after being buffered by the refractory bricks, flows through the resin sand layer to the flow channels 21.
[0006] Furthermore, the refractory brick assembly includes a first refractory brick assembly 23 and a second refractory brick assembly 22. The molten iron is placed in a ladle, and during the pouring of the ladle, the position of the bottom 20 of the basin is transferred from the first refractory brick assembly 23 to the second refractory brick assembly 22.
[0007] Furthermore, the first refractory brick group 23 and the second refractory brick group 22 are located on both sides of the flow channel 21.
[0008] Furthermore, the projected areas of the first refractory brick group 23 and the second refractory brick group 22 on the bottom of the basin 20 are not equal.
[0009] Furthermore, the first refractory brick group 23 includes 1 refractory brick, and the second refractory brick group 22 includes 5 refractory bricks.
[0010] Furthermore, the refractory brick has a length of 230mm, a width of 115mm, and a height of 30mm.
[0011] Furthermore, the fire-retardant coating is an alcohol-based coating.
[0012] Furthermore, the alcohol-based coating has a Baumé degree of 90%.
[0013] Furthermore, flow channel 21 is a paper tube channel.
[0014] Furthermore, the pouring basin has a length of 880-1000mm, a width of 730-840mm, and a height of 500mm.
[0015] The technical effects and advantages of this utility model are as follows:
[0016] This invention significantly enhances the erosion resistance of the pouring basin by employing a dual protective measure: applying an alcohol-based coating to the inner wall of the pouring basin and placing refractory bricks at the bottom of the basin. After drying, the alcohol-based coating forms a dense refractory coating, while the refractory bricks provide a stable physical barrier, jointly preventing the erosion of the resin sand by the high-temperature molten iron. This structure effectively prevents sand inclusions from entering the mold cavity, fundamentally reducing the occurrence of sand hole defects in the casting and significantly improving the quality of the finished casting.
[0017] This utility model has a reasonable structural design, simple process operation, low manufacturing and implementation cost, and can effectively solve the sand flushing problem in lost foam casting, thus having high practical value. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model.
[0019] Among them, 10 is the basin wall; 11 is the fireproof coating layer; 20 is the basin bottom; 21 is the flow channel; 22 is the second refractory brick group; and 23 is the first refractory brick group. Detailed Implementation
[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0021] Reference Figure 1 As shown, this utility model provides a lost foam casting smelting anti-impact sand pouring basin, including a basin bottom 20, a basin wall 10 connected to the basin bottom 20 to form a space for containing molten iron, a number of flow channels 21 provided in the basin bottom 20, the molten iron can flow out from the flow channels 21, and the flow channels 21 are located in the center of the basin bottom 20.
[0022] The pouring basin is 880-1000mm long, 730-840mm wide, and 500mm high.
[0023] The basin bottom 20 is also provided with a first refractory brick group 23 and a second refractory brick group 22. Molten iron is poured from the ladle into the first refractory brick group 23 and the second refractory brick group 22. The position where the molten iron first contacts the basin bottom 20 during pouring is the first position. The first refractory brick group 23 is located at the first position, the molten iron flow rate is the first flow rate, and the projected area of the first refractory brick group 23 on the basin bottom 20 is the first area that initially contacts the basin bottom 20 during the pouring process. The contact position between the molten iron and the basin bottom 20 moves to a second position due to the inertia of the ladle pouring. The molten iron flow rate is the second flow rate, and the second refractory brick group 22 is located at the second position. The projected area of the second refractory brick group 22 on the basin bottom 20 is the second area that contacts the basin bottom 20 during the pouring process. Since the second flow rate is greater than the first flow rate, the second area of the second refractory brick group 22 is greater than the first area of the first refractory brick group 23. The first refractory brick group 23 includes 1 refractory brick, and the second refractory brick group 22 includes 5 refractory bricks. The length of each refractory brick is 230mm, the width is 115mm, and the height is 30mm. The first refractory brick group 23 and the second refractory brick group 22 are located on both sides of the flow channel 21 to accommodate the change in the contact position between the molten iron and the bottom of the basin 20 during the pouring of the molten iron ladle.
[0024] The basin bottom 20 includes a resin sand layer located on the upper surface of the basin bottom 20. The erosion resistance of the first refractory brick group 23 and the second refractory brick group 22 is greater than the erosion resistance of the resin sand layer of the basin bottom 20. The first refractory brick group 23 and the second refractory brick group 22 are embedded in the resin sand layer of the basin bottom 20. The height of the first refractory brick group 23 and the second refractory brick group 22 is not lower than that of the basin bottom 20, so that the molten iron first impacts the first refractory brick group 23 or the second refractory brick group 22, and then the molten iron flows from the first refractory brick group 23 or the second refractory brick group 22 to the basin bottom 20.
[0025] The inner surface of the basin wall 10 is coated with a fire-retardant coating layer 11, which is an alcohol-based coating layer with a Baumé degree of 90%.
[0026] The surfaces of the first refractory brick group 23 and the second refractory brick group 22 are coated with fire-retardant paint. The fire-retardant paint is an alcohol-based paint with a Baumé degree of 90%. The alcohol-based paint forms an alcohol-based paint layer, and the erosion resistance of the alcohol-based paint layer is greater than that of the resin sand layer at the bottom of the basin 20. The flow channel 21 is a paper tube channel.
[0027] Workflow:
[0028] The molten iron is poured from the ladle into the pouring basin. The molten iron first washes over the first refractory brick group 23, and then flows into the flow channel 21 through the bottom 20 of the basin. Then, due to the inertia of the ladle, the molten iron washes over the second refractory brick group 22, and the flow rate of the molten iron increases. The second projected area of the second refractory brick group 22 on the bottom 20 of the basin can accommodate the increased flow rate of the molten iron. After washing over the second refractory brick group 22, the molten iron flows into the flow channel 21 through the bottom 20 of the basin.
[0029] It should be understood that, firstly, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change.
[0030] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A lost foam casting smelting anti-impact sand pouring basin, comprising a basin wall (10) and a basin bottom (20) forming a space for containing molten iron, wherein the basin bottom (20) is provided with several flow channels (21) for allowing molten iron to flow out, characterized in that: The upper surface of the basin bottom (20) includes a resin sand layer, in which refractory bricks are embedded. The height of the refractory bricks is not lower than the height of the resin sand layer. The inner surface of the basin wall (10) and / or the surface of the refractory bricks are coated with fireproof paint. The refractory bricks are located at the iron scouring point. The refractory bricks, after being buffered by the refractory bricks, flow through the resin sand layer to the flow channel (21).
2. The lost foam casting smelting anti-impact sand pouring basin according to claim 1, characterized in that: The refractory brick group includes a first refractory brick group (23) and a second refractory brick group (22). The molten iron is placed in a ladle. During the pouring of the ladle, the position of the bottom (20) of the basin is transferred from the first refractory brick group (23) to the second refractory brick group (22).
3. The lost foam casting smelting anti-impact sand pouring basin according to claim 2, characterized in that: The first refractory brick group (23) and the second refractory brick group (22) are located on both sides of the flow channel (21).
4. The lost foam casting smelting anti-impact sand pouring basin according to claim 3, characterized in that: The projected areas of the first refractory brick group (23) and the second refractory brick group (22) on the bottom of the basin (20) are not equal.
5. The lost foam casting smelting anti-impact sand pouring basin according to claim 4, characterized in that: The first refractory brick group (23) includes 1 refractory brick, and the second refractory brick group (22) includes 5 refractory bricks.
6. The lost foam casting smelting anti-impact sand pouring basin according to claim 5, characterized in that: The refractory brick has a length of 230mm, a width of 115mm, and a height of 30mm.
7. The lost foam casting smelting anti-impact sand pouring basin according to claim 1, characterized in that: The fire-retardant coating is an alcohol-based coating.
8. The lost foam casting smelting anti-impact sand pouring basin according to claim 7, characterized in that: The alcohol-based coating has a Baumé degree of 90%.
9. A lost foam casting smelting anti-impact sand pouring basin according to claim 1, characterized in that: The flow channel (21) is the paper tube channel.
10. A lost foam casting smelting anti-impact sand pouring basin according to claim 1, characterized in that: The pouring basin has a length of 880-1000mm, a width of 730-840mm, and a height of 500mm.