Sealing structure of one-type multi-cylinder-cover pouring system
By designing the runner core and runner cap in a one-piece cylinder head casting system, a closed straight runner channel is formed, which solves the problem of iron liquid loss caused by the unclosed casting system, and achieves smoother exhaust and higher quality castings.
Patent Information
- Application Number
- CN202421621646.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The casting system of one type and multi-piece is not closed at the matching surface of the straight runner and core group, causing the iron liquid to drill from the gap between the sand core and the outer side to other exhaust and sand accumulation positions during the casting process, resulting in problems such as obstruction of the exhaust gas of the sand core and excessive iron liquid loss.
A sealing structure of a one-type multi-piece cylinder head casting system is designed. By adding a runner core between the sand core and the outer shape, the runner core is embedded in the lower shape, and a runner cap is arranged above it to close the upper opening of the runner to form a closed straight runner passage.
It effectively avoids drilling from the sand core and the outer gap to other positions during the casting process, ensuring smooth exhaust of the core group, saving molten iron, and improving the quality of the castings.
Smart Images
Figure CN222944437U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sand casting of cylinder heads, in particular to a sealing structure of a one-mold multi-piece cylinder head pouring system. Background Art
[0002] Please refer to Figure 5 For castings with multiple parts in one mold, the pouring system is not closed at the mating surface of the sprue and the core group, which causes the molten iron to drill into other exhaust and sand accumulation positions from the gap between the sand core and the two sides of the outer mold during the pouring process, causing problems such as obstructed sand core exhaust and excessive loss of molten iron, which in turn leads to other defects in the casting. Utility Model Content
[0003] In order to solve the technical problem that for a casting with multiple pieces in one mold, the pouring system is not closed at the matching surface of the sprue and the core group, resulting in the molten iron drilling from the gap between the sand core and the two sides of the outer mold to other exhaust and sand accumulation positions during the pouring process, the utility model provides a sealing structure for the pouring system of a cylinder head with multiple pieces in one mold.
[0004] The technical solution adopted by the utility model is a sealing structure of a one-type multi-piece cylinder head casting system, including a runner core patch added between a sand core and an outer mold, the runner core patch is embedded and fixed in the lower outer mold, the runner core patch is an L-shaped shape consisting of a vertical runner wrapping part and a horizontal runner covering part, the lower side of the horizontal runner covering part and the back side of the vertical runner wrapping part are provided with mutually connected grooves as runners, and a runner cap is provided on the upper side of the vertical runner wrapping part to close the upper opening of the runner.
[0005] Furthermore, the runner cap is fixed on the runner core, and the runner cap is located in a conformal cavity provided in the upper outer mold.
[0006] Furthermore, the runner cap is fixed on the upper outer mold, and a circle of fire sealing strips is protruding from the outer periphery of the runner on the lower end surface of the runner cap.
[0007] Furthermore, the fire-sealing strip has a width of 4 mm and a height of 3 mm.
[0008] The utility model discloses a sealing structure of a one-type multi-piece cylinder head pouring system, and according to the sand core structure, a runner core is designed between the sand core and the outer mold, the sand core is provided with a straight runner channel, and a runner cap for closing the upper opening of the runner is arranged above the runner core. The runner core is placed in the lower outer mold, and when the upper and lower outer molds are closed, a closed straight runner channel is formed, so that molten iron is prevented from drilling into other exhaust and sand accumulation positions from the gap between the sand core and the outer mold on both sides during the pouring process, thereby making the exhaust of the core group smooth, saving molten iron, and improving the quality of castings. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a structural schematic diagram of the utility model;
[0010] Figure 2 This is a schematic diagram of the structure of the runner core and the runner cap of the utility model;
[0011] Figure 3 It is a side view of the runner core and the runner cap of the utility model;
[0012] Figure 4 It is a structural schematic diagram of the pouring channel cap of the utility model;
[0013] Figure 5 It is a structural schematic diagram of the prior art.
[0014] In the figure: 1. Sand core; 2. Runner core filling; 21. Vertical runner wrapping part; 22. Horizontal runner covering part; 3. Runner cap; 31. Fire sealing strip; 4. Straight runner. DETAILED DESCRIPTION
[0015] In order to better understand the purpose, structure and function of the utility model, the sealing structure of a one-type multi-piece cylinder head casting system of the utility model is further described in detail below in conjunction with the accompanying drawings.
[0016] like Figure 1~Figure 3 As shown, a sealing structure of a one-type multi-piece cylinder head casting system includes a runner core 2 added between a sand core 1 and an outer mold (not shown in the figure), the runner core 2 is embedded and fixed in the lower outer mold, and the runner core 2 is an L-shaped shape consisting of a vertical runner wrapping part 21 and a horizontal runner covering part 22. The bottom of the horizontal runner covering part 22 and the back of the vertical runner wrapping part 11 are provided with mutually connected grooves as runners, and a 5-10mm high runner cap 3 is provided on the top of the vertical runner wrapping part 21 to close the upper opening of the runner.
[0017] The sealing structure of the one-type multi-piece cylinder head casting system of this embodiment is provided with a runner core 2 between the sand core 1 and the outer mold. The runner core 2 is provided with a sprue channel. The runner core 2 is placed in the lower outer mold, and a runner cap 3 is fixed on the runner core 2. In addition, a cavity with a height of about 5-10 mm is designed in the upper outer mold. When the upper and lower outer molds are closed, the cavity is covered on the runner cap 3. The runner core 2, the runner cap 3 and the lower outer mold form a closed sprue channel, so that the sprue 4 is completely closed on all sides to prevent the molten iron from drilling into other exhaust and sand accumulation positions.
[0018] like Figure 4 As shown, in an optional embodiment, the runner cap 3 is fixed to the upper outer mold, and a circle of fire-sealing strips 31 with a width of about 4 mm and a height of about 3 mm is protruded on the lower end surface of the runner cap 3 at the periphery of the runner. The runner bushing 2 is a flat surface, and the protruding fire-sealing strips 31 are relatively soft compared to the runner bushing 2. The protruding fire-sealing strips 31 are crushed on the flat surface to achieve sealing and form a closed pouring system.
[0019] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.
Claims
1. A sealing structure for a multi-piece cylinder head gating system, characterized in that: The invention comprises a runner core (2) added between the sand core (1) and the outer mold, the runner core (2) being embedded and fixed in the lower outer mold, the runner core (2) being in an L-shaped shape as a whole, consisting of a vertical runner wrapping portion (21) and a transverse runner covering portion (22), the bottom of the transverse runner covering portion (22) and the back of the vertical runner wrapping portion (21) being provided with mutually connected grooves as a runner, and the top of the vertical runner wrapping portion (21) being provided with a runner cap (3) to close the upper opening of the runner.
2. The sealing structure of a multi-piece cylinder head gating system according to claim 1, characterized in that: The runner cap (3) is fixed on the runner core (2), and the runner cap (3) is located in a conformal cavity provided in the upper outer mold.
3. The sealing structure of a multi-piece cylinder head gating system according to claim 1, characterized in that: The runner cap (3) is fixed to the upper outer mold, and a circle of fire-sealing strips (31) is protruding from the lower end surface of the runner cap (3) at the periphery of the runner.
4. The sealing structure of a multi-piece cylinder head gating system according to claim 3 is characterized in that: The width of the fire-sealing strip (31) is 4 mm, and the height is 3 mm.