Auxiliary multi-layer pouring system
By using a three-layer sub-gating system and an inclined auxiliary gating system, the problem of uneven temperature during the casting process of engine cylinder blocks with complex thin-walled structures was solved, achieving stable filling of the casting fluid and reducing temperature differences, thus improving the casting quality.
Patent Information
- Application Number
- CN202520594784.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Existing casting systems struggle to balance temperature field distribution during the casting process of engine cylinder blocks with complex thin-walled structures, easily leading to turbulence and cold shut defects in the pores.
The design employs a three-layer sub-gating system and an auxiliary gating system, including a bottom layer, a middle layer, an upper layer sub-gating system, and an auxiliary gating system. The auxiliary gating system is inclined upwards to ensure that the molten metal is filled in layers, reduce turbulence, and control the temperature field distribution through the inclination angle.
This method achieves stable filling of the casting liquid, shortens the filling time, reduces temperature difference, lowers the proportion of porosity defects, and improves casting quality.
Smart Images
Figure CN223960524U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of casting and pouring systems. Background Technology
[0002] like Figure 1 The image shows a gating system for casting in the prior art. This system has gates extending from the upper runner 1' to both sides. The gates branch into upper ingates 2' and lower ingates 3', through which casting liquid is injected into the mold 4'. However, due to the increasing demands for lightweight automotive engine blocks, the design of automotive engine blocks has become more complex and the wall thickness varies more significantly in order to reduce weight. Figure 1 When the gating system is applied in the casting production process of engine cylinder blocks with complex thin-walled structures, the two inner gates are concentrated in the middle of the mold to pour into the mold. It is difficult to balance the relative uniformity of the temperature field distribution during the casting process, and the casting liquid is prone to turbulence, making it difficult to maintain the stability of the casting process. As a result, defects such as air holes, cold shuts, and oxide slag are easily generated.
[0003] Therefore, a new technical solution is needed to solve the above problems. Utility Model Content
[0004] To address the problems arising from existing technologies, this invention provides an auxiliary multi-layer casting system, which aims to reduce turbulence in the casting liquid and to balance the temperature field distribution of the casting liquid at the bottom and top of the cylinder.
[0005] To achieve the above objectives, the auxiliary multi-layer casting system of this utility model can adopt the following technical solution:
[0006] An auxiliary multi-layer gating system includes a sprue with a pouring cup at the top, an upper horizontal gating connected to the bottom of the sprue, and a sprue extending downward from the upper horizontal gating. The bottom of the sprue is connected to at least one bottom sub-gating, the middle of the sprue is connected to at least one middle sub-gating, and the upper part of the sprue is connected to at least one upper sub-gating and an auxiliary gating. The outlet axes of the bottom sub-gating, the middle sub-gating, and the upper sub-gating are parallel to each other. The at least one upper sub-gating and the auxiliary gating share a common inlet end connected to the sprue, and the upper sub-gating and the auxiliary gating branch off from the inlet end, with the outlet of the auxiliary gating being higher than the outlet of the upper sub-gating.
[0007] Furthermore, the bottom sub-gating channel is a flat gating channel, while the middle sub-gating channel, the upper sub-gating channel, and the auxiliary gating channel are all rod-shaped gating channels.
[0008] Furthermore, hollow connecting rods are provided on both sides of the sprue, which are connected to the sprue and extend to both sides respectively. Several upper sub-sprues are provided, and upper sub-sprues are provided on both the sprue and the connecting rods.
[0009] Furthermore, there are two sprue channels, which are located at both ends of the upper horizontal sprue channel and extend downward from the upper horizontal sprue channel.
[0010] Furthermore, only the outermost upper sub-gating channel is connected to an auxiliary gating channel.
[0011] Furthermore, both sides of the direct gating channel are provided with an upper sub-gating channel, a middle sub-gating channel, a bottom sub-gating channel, and an auxiliary gating channel; and the upper sub-gating channel, the middle sub-gating channel, and the bottom sub-gating channel on both sides are symmetrically arranged relative to the direct gating channel.
[0012] Furthermore, the bottom of the direct gating channel is connected to a bottom horizontal gating channel, and the two sides of the bottom horizontal gating channel are connected to the bottom sub-gating channel.
[0013] Furthermore, the axis of the auxiliary gating system is inclined upwards at 25° to 35° relative to the horizontal plane.
[0014] Furthermore, there are two auxiliary gating channels, which are connected to the two outermost upper sub-gating channels respectively, and the outlet directions of the two auxiliary gating channels are opposite.
[0015] Beneficial effects: The auxiliary multi-layer gating system provided by this utility model enables the molten metal to fill the mold cavity in layers by setting three sub-gating channels and auxiliary gating channels, thereby reducing turbulence; at the same time, it shortens the filling time; and it also reduces the temperature difference between the top and bottom of the mold during filling, so as to balance the temperature field distribution of the molten metal at the bottom and top of the cylinder. Attached Figure Description
[0016] Figure 1 This is a structural diagram of a casting system in the prior art;
[0017] Figure 2 This is a perspective view of the auxiliary multi-layer casting system of this utility model;
[0018] Figure 3 This is a diagram showing the state of the auxiliary multi-layer gating system of this utility model in use with the mold;
[0019] Figure 4 for Figure 1 A schematic diagram of the multi-layer gating system with auxiliary support, shown from one end face;
[0020] Figure 5 for Figure 1 A schematic diagram showing all sub-sprues on one side of the auxiliary multi-layer gating system. Detailed Implementation
[0021] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.
[0022] Please see Figure 2 As shown, this utility model discloses an auxiliary multi-layer casting system, including a casting rod 2 with a pouring cup 1 at the top, an upper horizontal gating channel 3 connected to the bottom of the casting rod 2, and a casting channel 4 extending downward from the upper horizontal gating channel 3. A slag collection bag 12 is provided inside the upper horizontal gating channel 3 above the casting channel 4, and a filter block 13 is provided at the connection between the top of the casting channel 4 and the upper horizontal gating channel 3. A bottom sub-gating channel 5 is connected to the bottom of the casting channel 4. A middle sub-gating channel 6 is connected to the middle part of the casting channel 4. An upper sub-gating channel 7 and an auxiliary gating channel 8 are connected to the upper part of the casting channel 4. The bottom sub-gating channel 5 is a flat gating channel, while the middle sub-gating channel 6, the upper sub-gating channel 7, and the auxiliary gating channel 8 are all rod-shaped gating channels. In this embodiment, the auxiliary gating system 8 is located at both ends of the overall system. The outermost upper sub-gating system 7 and the auxiliary gating system 8 share the same inlet end connected to the sprue 4. The upper sub-gating system 7 and the auxiliary gating system 8 extend from the inlet end, and the outlet of the auxiliary gating system 8 is higher than the outlet of the upper sub-gating system 7. In this embodiment, there are several upper sub-gating systems 7 arranged at the same height, while there are two sprue systems 4. Since the sprue system 4 cannot directly connect to all the upper sub-gating systems 7, hollow connecting rods 9 are provided on both sides of the sprue system 4, which are connected to the sprue system 4 and extend to both sides respectively. Upper sub-gating systems 7 are provided on both the sprue system 4 and the connecting rods 9, so that the upper sub-gating systems 7 can be arranged in rows at the same height and simultaneously connected to the sprue system 4 through the connecting rods 9. For the same reason, in order to enable several bottom sub-sprues 5 to be arranged in rows at the same height, the bottom of the sprue 4 is connected to the bottom horizontal sprue 10, and the two sides of the bottom horizontal sprue 10 are connected to the bottom sub-sprues 5, so that the bottom sub-sprues 5 are connected to the sprue 4 through the bottom horizontal sprue 10.
[0023] Please combine Figure 3 As shown, the sprue 4 has an upper sub-sprue 7, a middle sub-sprue 6, a bottom sub-sprue 5, and an auxiliary sprue 8 on both sides; the upper sub-sprue 7, middle sub-sprue 6, and bottom sub-sprue 5 on both sides are symmetrically arranged relative to the sprue 4; there are two auxiliary sprues 8, which are located on the two outermost upper sub-sprues 7 and connected to each other, and the outlet directions of the two auxiliary sprues 8 are opposite. This arrangement allows the gating system to cast two molds 11 of the same model at the same time.
[0024] Please combine Figure 4As shown, the auxiliary runner 8 extends upwards at an angle, and its axis is inclined upwards at 25° to 35° relative to the horizontal plane. After debugging and verification, this angle range effectively ensures that the molten metal entering the mold through the auxiliary runner 8 fills a higher section of the mold, and helps control the temperature in that section. Also, please refer to... Figure 5 As shown, in this embodiment, for each sub-sprue and auxiliary sprue located on the same side of the overall system and pouring into the same mold gate, the outlet axis of the bottom sub-sprue 5, the outlet axis of the middle sub-sprue 6, and the outlet axis of the top sub-sprue 7 are parallel to each other. The number of sub-sprues is: 4 bottom sub-sprues 5, 2 middle sub-sprues 6, 5 top sub-sprues 7, and one auxiliary sprue 8. Furthermore, actual verification shows that the ratio of the total area of the 4 bottom sub-sprues 5, the total area of the 2 middle sub-sprues 6, and the total area of the 5 top sub-sprues 7 is 4:1:2.5. This arrangement allows for a shorter mold filling time compared to existing gating systems for the same mold. Figure 1 The filling time (as shown) is reduced by about 8%, and compared with the existing gating system, the temperature difference between the upper and lower molds of the cylinder is reduced by about 10%, and the proportion of air holes is reduced by more than 80%.
Claims
1. An auxiliary multi-layer pouring system comprising a straight sprue with a gate cup at the top, an upper cross gate in communication with the bottom of the straight sprue, and a straight runner extending downward from the upper cross gate; characterized in that, The bottom of the sprue is connected with at least one bottom sub-sprue, the middle of the sprue is connected with at least one middle sub-sprue, the upper part of the sprue is connected with at least one upper sub-sprue and an auxiliary sprue, and the outlet axes of the bottom sub-sprue, the middle sub-sprue and the upper sub-sprue are parallel to each other; the upper sub-sprue and the auxiliary sprue share an inlet end communicated with the sprue, and the upper sub-sprue and the auxiliary sprue extend from the inlet end, and the outlet of the auxiliary sprue is higher than that of the upper sub-sprue.
2. The auxiliary multiple layer pouring system of claim 1, wherein, The bottom sub-sprue is a flat sprue, and the middle sub-sprue, the upper sub-sprue and the auxiliary sprue are rod-shaped sprues.
3. The auxiliary multiple layer pouring system of claim 1, wherein, The straight sprue is provided with hollow connecting rods communicated with the straight sprue and extending to both sides, and the upper sub-sprues are arranged on the straight sprue and the connecting rods.
4. The auxiliary multi-layer casting system of claim 3, wherein, The straight sprue is two, and the two straight sprues are located at both ends of the upper horizontal sprue and extend downward from the upper horizontal sprue.
5. The auxiliary multiple layer pouring system of claim 3, wherein, Only the outermost upper sub-sprue is connected with an auxiliary sprue.
6. The auxiliary multi-layer guniting system according to claim 3 or 4 or 5, characterized in that, The straight sprue is provided with upper sub-sprues, middle sub-sprues, bottom sub-sprues and auxiliary sprues on both sides, and the upper sub-sprues, the middle sub-sprues and the bottom sub-sprues on both sides are symmetrically arranged relative to the straight sprue.
7. The auxiliary multi-layer guniting system according to claim 1 or 2, characterized in that, The bottom of the straight sprue is communicated with a bottom horizontal sprue, and the two sides of the bottom horizontal sprue are communicated with the bottom sub-sprues.
8. The auxiliary multi-layer casting system of claim 1 or 5, wherein, The axis of the auxiliary sprue is inclined upward by 25° to 35° relative to the horizontal plane.
9. The auxiliary multi-layer casting system of claim 8, wherein, The auxiliary sprue is two and is connected with the two outermost upper sub-sprues, and the outlet directions of the two auxiliary sprues are opposite.