A two-piece casting system for an engine cylinder block

Abstract

This utility model discloses a two-piece casting system for an engine cylinder block, including a sprue, a branch runner below the sprue, and horizontal runners on both sides connected to the two ends of the branch runner. The middle position of the horizontal runner is connected to the branch runner. Filters are arranged on both sides of the horizontal runner near the middle position. The outer part of the horizontal runner connects to the outer inner runner at the outer end of the filter. A middle inner runner is arranged between the filters on both sides of the horizontal runner, and the middle inner runner is connected to the adjacent outer inner runners on both sides. The front ends of the outer inner runner and the middle inner runner have a V-shaped structure, dividing into upper and lower water inlet runners that connect to the cylinder block bearing plane of the casting. This utility model can improve production efficiency and reduce costs. Through the reasonable arrangement of the casting system, problems such as iron drilling, size, and defects in castings with multiple parts in one box are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of diesel engine cylinder block casting process, and specifically relates to a two-piece casting system for engine cylinder block. Background Technology

[0002] As one of the core components of a diesel engine, the casting quality of the engine block directly affects the performance and reliability of the entire engine. Traditional cylinder block casting production typically employs a "one piece per box" casting process. Taking a certain model of engine block as an example, with dimensions of 763mm × 358mm × 424mm, it is currently cast individually within a 1500mm × 1200mm × 450mm sand box. While this helps control the quality of individual castings, it also suffers from low production efficiency, insufficient sand box utilization, significant material waste, and high costs.

[0003] With increased production capacity and intensified market competition, higher demands are being placed on casting efficiency and unit cost control. While multi-piece casting in a single mold box has been gradually adopted in some castings, its application in engine block casting presents significant challenges. This is due to the complex structure, high requirements for internal casting quality (such as shrinkage porosity, air pockets, and inclusions), and the potential for uneven molten metal flow, iron-boring defects, and dimensional accuracy fluctuations caused by multi-point pouring. Therefore, the design and application of a two-piece cylinder block casting system in a single mold box is urgently needed. This system offers a rational structure, uniform molten metal distribution, and ensures casting quality, thereby improving mold box utilization, production efficiency, and reducing overall casting costs. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a two-piece casting system for an engine cylinder block.

[0005] The technical solution adopted by this utility model is a two-piece casting system for an engine cylinder block, including a sprue, a branch channel below the sprue, the two ends of the branch channel connecting to the two sides of the horizontal sprue, the middle position of the horizontal sprue communicating with the branch channel, filters arranged on both sides of the horizontal sprue near the middle position, the outer part of the horizontal sprue connecting to the outer inner sprue, a middle inner sprue between the filters on both sides of the horizontal sprue, the middle inner sprue communicating with the adjacent outer inner sprues on both sides, the front ends of the outer inner sprue and the middle inner sprue are V-shaped structures dividing into upper and lower water inlet channels that connect to the casting cylinder block bearing plane.

[0006] Furthermore, both the central ingate and the outer ingate include vertical runners. The upper part of the vertical runner of the outer ingate is connected to the horizontal runner, and the upper sides of the vertical runner of the central ingate are provided with horizontal runners that are connected to the upper part of the vertical runner of the adjacent outer ingate.

[0007] Furthermore, the lower ends of the vertical runners of both the central ingate and the outer ingate are connected to the lower horizontal runner.

[0008] Furthermore, both the central ingate and the outer ingate include triangular connecting runners. The rear corner of the triangular connecting runner is connected to the vertical runner, and the upper and lower parts of the front side are connected to two water inlet runners respectively.

[0009] Furthermore, the central ingate is located in the middle of the runner, and the central ingate and the outer ingate are spaced equidistant from each other.

[0010] Furthermore, it includes overflow columns, which are evenly distributed on the outer side of the casting away from the direction of the sprue.

[0011] The engine cylinder block one-box two-piece casting system provided by this utility model has the following beneficial effects:

[0012] 1. By simultaneously casting two cylinders in the same sand box, the output per unit time can be significantly increased, the sand mold utilization rate can be improved, and the production efficiency can be increased.

[0013] 2. By adopting a combination of reasonably arranged sprues, runners, horizontal runners and multiple ingates, and combining the design of interconnected middle and outer ingates, the uniform distribution of molten metal between the two cavities is ensured, which can optimize the gating system structure and effectively avoid casting deviations between castings.

[0014] 3. By setting up filters and a V-shaped double inlet structure, the incidence of defects such as slag inclusions, iron filings, and shrinkage cavities can be reduced, thereby improving the dimensional stability and density of castings and enhancing casting quality.

[0015] 4. Compared with the "one box, one piece" process, it can significantly reduce the unit cost of sand boxes, core boxes and smelted metals, reduce energy consumption and labor intensity, and save materials and energy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a front view of the present invention;

[0018] Figure 3 This is a top view of the present invention.

[0019] In the diagram: 1. Sprue; 2. Runner; 3. Horizontal runner; 31. Filter; 4. Outer inner runner; 5. Middle inner runner; 6. Water inlet runner; 7. Vertical runner; 8. Horizontal runner; 9. Lower horizontal runner; 10. Triangular connecting runner; 11. Casting; 12. Overflow column. Detailed Implementation

[0020] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a two-piece casting system for an engine cylinder block.

[0021] like Figures 1-3 As shown, an engine block two-piece casting system includes a sprue 1, a runner 2 below the sprue 1, two ends of the runner 2 connected to two side runners 3, the middle of the runner 3 connected to the runner 2, filters 31 arranged on both sides of the runner 3 near the middle, the outer part of the runner 3 connected to the outer inner runner 4, a middle inner runner 5 between the filters 31 on both sides of the runner 3, the middle inner runner 5 connected to the adjacent outer inner runners 4 on both sides, the front ends of the outer inner runners 4 and the middle inner runner 5 are V-shaped structures to divide into upper and lower water inlet runners 6 connected to the cylinder bearing plane of the casting 11, and overflow columns 12 are evenly distributed on the outer side of the casting 11 away from the runner 3.

[0022] In this embodiment, the central ingate 5 is located in the middle of the horizontal runner 3, and the central ingate 5 and the outer ingate 4 are spaced equidistant from each other. Both the central ingate 5 and the outer ingate 4 include a vertical runner 7 and a triangular connecting runner 10. The rear corner of the triangular connecting runner 10 is connected to the vertical runner 7, and the upper and lower parts of the front side are connected to two water inlet runners 6 respectively. The upper part of the vertical runner 7 of the outer ingate 4 is connected to the horizontal runner 3. Horizontal runners 8 are provided on both sides of the upper part of the vertical runner 7 of the central ingate 5 and are connected to the upper part of the vertical runner 7 of the adjacent outer ingate 4. The lower ends of the vertical runners 7 of the central ingate 5 and the outer ingate 4 are both connected to the lower horizontal runner 9.

[0023] The gating system of this invention divides the molten metal from the sprue 1 into two streams, which then flow into the gating 3 of each piece, ultimately allowing the molten metal to enter the cavity of each piece. This improves production efficiency and reduces costs. Through the rational arrangement of the gating system, problems such as iron drilling, dimensional inconsistencies, and defects in multi-piece castings are solved.

[0024] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. An engine block two-part casting system characterized by, It includes a sprue (1), a runner (2) is provided below the sprue (1), the two ends of the runner (2) are connected to the horizontal runners (3) on both sides, the middle position of the horizontal runner (3) is connected to the runner (2), the horizontal runner (3) is arranged with filters (31) on both sides near the middle position, the horizontal runner (3) is connected to the outer inner runner (4) on the outer part of the filter (31), the middle inner runner (5) is provided between the filters (31) on both sides of the horizontal runner (3), the middle inner runner (5) is connected to the adjacent outer inner runners (4) on both sides, the front end of the outer inner runner (4) and the middle inner runner (5) are V-shaped structures to divide the upper and lower water inlet runners (6) to connect the cylinder bearing plane of the casting (11).

2. The engine block two-part casting system of claim 1, wherein, Both the middle ingate (5) and the outer ingate (4) include vertical runners (7). The upper part of the vertical runner (7) of the outer ingate (4) is connected to the horizontal runner (3). The upper sides of the vertical runner (7) of the middle ingate (5) are provided with horizontal runners (8) which are connected to the upper part of the vertical runner (7) of the adjacent outer ingate (4).

3. The engine block two-part casting system of claim 2, wherein, The lower ends of the vertical runners (7) of the middle inner runner (5) and the outer inner runner (4) are both connected to the lower horizontal runner (9).

4. The engine block two-part casting system of claim 2, wherein, Both the central ingate (5) and the outer ingate (4) include a triangular connecting gating (10). The rear corner of the triangular connecting gating (10) is connected to the vertical gating (7), and the upper and lower parts of the front side are connected to two water inlet gatings (6).

5. The engine block two-bank casting system according to any one of claims 1 to 4, characterized in that, The central ingate (5) is located in the middle of the horizontal runner (3), and the central ingate (5) and the outer ingate (4) are spaced equidistant from each other.

6. The engine block two-part casting system of claim 1, wherein, It includes overflow columns (12), which are evenly distributed on the outside of the casting (11) away from the horizontal runner (3).

Images