A novel ship control hull mold casting system

Abstract

This application provides a novel ship control hull mold casting system, relating to the field of metal casting molds. It includes a gating structure on one side of the cavity and an venting structure on the remaining sides of the cavity. The gating structure is stepped, positioned at the top of the cavity and higher than the cavity itself. The gating structure includes a riser, a main channel, two branch channels, and multiple sub-channels connected sequentially along the pouring direction. The two branch channels extend obliquely to both sides from the ends of the main channel, with their widths gradually decreasing. Each branch channel branches out two spaced sub-channels on its side facing the cavity. The height of the sub-channels gradually decreases, and their width gradually increases at their ends. The height of the sub-channels is lower than the height of the branch channels, and the height of the branch channels is lower than the height of the main channel. The venting structure includes multiple venting slag bags spaced apart and connected to the bottom of the outer side of the cavity. This application effectively solves the technical problems of turbulence and slag inclusions easily generated by traditional flow channels.

Description

Technical Field

[0001] This utility model relates to the field of metal casting molds, and in particular to a novel ship control hull mold casting system. Background Technology

[0002] Marine parts have complex structures and uneven wall thicknesses, which can easily lead to cold shuts and porosity during casting. Furthermore, the complex structure of the hull can cause uneven flow of molten metal.

[0003] Traditional ship control hull casting molds use sprues during pouring, which leads to problems such as unstable molten metal filling and severe air entrapment during the pouring process, easily causing defects such as porosity and cold shuts in the castings. Furthermore, existing venting structures mostly use a single venting channel, resulting in low venting efficiency, and are particularly unsuitable for complex, thin-walled ship control hull structures. Utility Model Content

[0004] In view of the above problems, the present invention provides a novel ship control hull mold casting system that overcomes or at least partially solves the above problems.

[0005] A novel ship control hull mold casting system includes a gating structure disposed on one side of the cavity and an venting structure disposed on the remaining sides of the cavity;

[0006] The gating structure is stepped and is located at the top of the cavity, higher than the cavity. The gating structure includes a riser, a main runner, two branch runners, and multiple sub-runners connected sequentially along the pouring direction. The two branch runners extend obliquely from the end of the main runner to both sides with gradually narrowing widths. Each of the two branch runners branches out two spaced sub-runners on the side facing the cavity. The height of the sub-runners gradually decreases, and their width gradually increases at the ends. The height of the sub-runners is lower than the height of the branch runners, and the height of the branch runners is lower than the height of the main runner.

[0007] The venting structure includes multiple venting slag bags spaced apart and connected to the bottom of the outer side of the cavity.

[0008] Preferably, the two runners are inclined toward one side of the cavity at an angle of 5°-10° along the pouring direction.

[0009] Preferably, the outlet of the branch channel has an expansion structure on both sides with an inclination angle of 15°-30°.

[0010] Preferably, the height of the main channel is 8-12mm and the height of the branch channel is 7-11mm.

[0011] Preferably, the diameter of the gating and riser is 58-62mm, the width of the main runner is 22-26mm, and the width of the large end of the branch runner is 16-20mm.

[0012] Preferably, five venting slag bags are provided on one side of the cavity relative to the gating structure, and three venting slag bags are provided on each side of the cavity adjacent to the gating structure.

[0013] Preferably, the exhaust slag bag includes an exhaust channel and a slag collection chamber that is recessed and disposed at the bottom of the exhaust channel.

[0014] Preferably, a first buffer section with a rounded corner radius of R9-R11mm is provided at the connection between the main flow channel and the two branch channels respectively; a second buffer section with a rounded corner radius of R3-R5mm is provided at the connection between the branch channels and the two branch channels respectively.

[0015] Preferably, the longitudinal cross-section of the riser, the main channel, the two branch channels, and the multiple tributary channels are all trapezoidal in shape, with a smaller upper section and a larger lower section.

[0016] This application specifically includes the following advantages:

[0017] In the embodiments of this application, a gating structure is provided on one side of the cavity and an venting structure is provided on the other side of the cavity; the gating structure is stepped and is located at the top of the cavity and higher than the cavity; the gating structure includes a riser, a main channel, two branch channels and multiple sub-channels connected sequentially along the pouring direction; the two branch channels extend obliquely from the end of the main channel to both sides and their width gradually decreases, and each of the two branch channels branches out two spaced sub-channels on the side facing the cavity; the height of the sub-channels gradually decreases and their end width gradually increases; wherein, the height of the sub-channels is lower than the height of the branch channels, and the height of the branch channels is lower than the height of the main channel; the venting structure includes multiple venting slag bags spaced apart and connected to the bottom of the outer side of the cavity. By incorporating a gating structure on one side of the mold cavity and raising the inlet position to allow feeding from above the product, the fluidity and pressure of the material are improved. A stepped gating structure reduces the intensity of turbulence in the molten metal, thus minimizing cold shut defects. An inclined runner design ensures smooth filling of the molten metal, reducing flow velocity and impact. The gradually narrowing runner design increases the directional pressure of the molten metal, and the branching into two terminally expanding branches ensures uniform feeding within the molding cavity, minimizing impact and increasing the feeding rate. Combined with an independent slag removal channel design, this significantly improves the stability of molten metal filling and slag removal efficiency. This system effectively solves the technical problems of turbulence and slag inclusions that are easily generated in traditional runners, and is particularly suitable for the precision die casting of complex thin-walled ship control hulls, demonstrating significant engineering application value. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the novel ship control shell mold casting system of this utility model;

[0020] Figure 2 This is a top view of the novel ship control hull mold casting system of this utility model;

[0021] Figure 3 This is a longitudinal cross-sectional view of the novel ship control shell mold casting system of this utility model;

[0022] Attached reference numerals: 1. Cavity; 2. Gating and riser; 3. Main runner; 4. Branch runner; 5. Sub-runner; 6. Venting slag bag; 61. Venting channel; 62. Slag collection chamber; 7. Sliding position. Detailed Implementation

[0023] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] Reference Figures 1-3 The diagram shows a structural schematic of a novel ship control shell mold casting system of the present invention, which may specifically include the following structures: a gating structure disposed on one side of the cavity 1 and an venting structure disposed on the other sides of the cavity 1;

[0025] The gating structure is stepped and is located at the top of the cavity runner 7, which is higher than the cavity 1. The gating structure includes a riser 2, a main runner 3, two branch runners 4, and multiple branch runners 5 connected sequentially along the pouring direction. The two branch runners 4 extend obliquely to both sides from the ends of the main runners 3 and their widths gradually decrease. Each of the two branch runners 4 branches out two spaced branch runners 5 from the side facing the cavity 1. The height of the branch runners 5 gradually decreases and their width gradually increases at the ends. The height of the branch runners 5 is lower than the height of the branch runners 4, and the height of the branch runners 4 is lower than the height of the main runner 3.

[0026] The venting structure includes multiple venting slag bags 6 spaced apart and connected to the bottom of the outer side of the cavity 1.

[0027] In the embodiments of this application, a gating structure is provided on one side of the cavity 1 and an venting structure is provided on the other sides of the cavity 1. The gating structure is stepped and is located at the top of the cavity runner 7 and is higher than the cavity 1. The gating structure includes a riser 2, a main channel 3, two branch channels 4 and multiple branch channels 5 connected sequentially along the pouring direction. The two branch channels 4 extend obliquely to both sides from the ends of the main channel 3 and their widths are gradually narrowed. The two branch channels 4 each branch out two spaced branch channels 5 on the side facing the cavity 1. The height of the branch channels 5 is gradually narrowed and the width of their ends is gradually widened. The height of the branch channels 5 is lower than the height of the branch channels 4, and the height of the branch channels 4 is lower than the height of the main channel 3. The venting structure includes multiple venting slag bags 6 connected at intervals to the bottom of the outer side of the cavity 1. By setting a gating structure on the slide 7 on one side of the cavity 1 and raising the inlet position to allow material to be fed from above the product, the fluidity and pressure of the material are improved. The stepped gating structure reduces the turbulence intensity of the molten metal, thereby reducing cold shut defects. The inclined branch channel 4 ensures smooth filling of the molten metal, reducing flow velocity and impact. The tapered design of the branch channel 4 increases the directional pressure of the molten metal, and its branching into two branch channels 5 with expanding ends ensures uniform feeding within the forming cavity 1, minimizes impact, and increases the feeding rate. Combined with an independent slag discharge channel design, this significantly improves the stability of molten metal filling and slag discharge efficiency. This system effectively solves the technical problems of turbulence and slag inclusions that are easily generated in traditional flow channels, and is particularly suitable for the precision die casting of complex thin-walled ship control hulls, demonstrating significant engineering application value.

[0028] The following will further describe a novel ship control hull mold casting system in this exemplary embodiment.

[0029] In this embodiment, the gating structure is located on one side of the cavity 1. The gating structure is stepped and located at the top of the slide 7. Its height is higher than the top surface of the cavity 1, and its height decreases sequentially towards the cavity 1. This raises the position of the inlet and the gating, allowing the molten metal to be fed from above the cavity 1, which improves the fluidity and pressure of the molten metal. Together with the venting structure located at the bottom of the other sides of the cavity 1, the gating structure and the cavity 1 together form a stepped structure, which can control the flow direction of the molten metal and make the casting material evenly distributed in the overall product.

[0030] The gating system includes a riser / gate 2, a main runner 3, two branch runners 4, and multiple sub-runners 5 connected sequentially along the pouring direction. The pouring material enters through the riser / gate 2 and flows from the bottom of the riser / gate 2 to the main runner 3. The main runner 3 connects to two branch runners 4 at its end. The two branch runners 4 extend obliquely to both sides from the end of the main runner 3, with their widths gradually decreasing to ensure smooth filling of the mold and avoid excessive impact from the sprue. Each of the two branch runners 4 branches out two spaced sub-runners 5 from one side facing the cavity 1, forming a total of four sub-runners 5. These four sub-runners 5 are evenly distributed on one side of the cavity 1, allowing material to enter from one side of the cavity 1. The height of the sub-runners 5 gradually decreases, while their width gradually increases at the ends, ensuring smooth filling of the cavity 1 from four positions. In this system, the height of the branch channel 5 is lower than that of the sub-channel 4, and the height of the sub-channel 4 is lower than that of the main channel 3. This creates a stepped structure with decreasing height along the pouring direction. The stepped transition reduces turbulence intensity, thereby reducing cold shut defects. The venting structure includes multiple venting slag bags 6 spaced apart and connected to the bottom of the outer side of the cavity 1. Multiple independent slag discharge channels improve the cleanliness of the casting and reduce the amount of surface impurities. In conjunction with the stepped gating structure, the inclined sub-channel 4, and the raised feed position, this system significantly improves the stability of the molten metal filling and the slag discharge efficiency. This system effectively solves the technical problems of turbulence and slag inclusions that are easily generated in traditional flow channels.

[0031] As an example, the two runners 4 are inclined towards the cavity 1 at an angle of 5°-10° along the pouring direction. This 5°-10° inclination angle creates a forward angle between the molten metal flow direction and the filling direction of the cavity 1. After velocity vector decomposition, the axial component maintains the filling propulsion force, while the radial component generates guiding pressure pointing towards the cavity 1. Actual measurements show that compared to the traditional vertical runner 4, the shear stress of the molten metal on the cavity 1 wall is reduced by 40%, effectively suppressing air entrapment. Simultaneously, the inclined runners extend the molten metal flow path, and the 5°-10° inclination angle creates a gradient solidification path. In ship control hull die casting, this can solve the problem of insufficient filling at the flange edge and eliminate cold shut defects at bolt hole locations.

[0032] Furthermore, the inclination angle of one of the flow channels 4 is smaller than that of the other flow channel 4. Specifically, the inclination angle of one flow channel 4 is 5°, and the inclination angle of the other flow channel 4 is 8°. Through the above structural angles, a differentiated inclination design is formed to meet the dynamic filling balance effect. The axial velocity component of the 5° flow channel 4 accounts for a large proportion, mainly undertaking the filling of the thick-walled area; the radial velocity component of the 8° flow channel 4 is increased, focusing on covering the filling of the thin-walled area, so that the filling time difference between the thick and thin areas is shortened from 0.6s to 0.15s, which is suitable for die casting of ship control hulls.

[0033] As an example, the outlet of the branch channel 5 has an expansion structure on both sides with an inclination angle of 15°-30°. The 15°-30° expansion reduces the flow velocity of the molten metal from 8m / s to 2-3m / s, reduces the eddy current intensity, avoids air entrapment caused by free jetting, and the expansion structure reduces the temperature gradient at the front edge of the molten metal, which can prevent cold shut defects.

[0034] As an example, the height of the main channel 3 is 8-12 mm, and the height of the branch channel 4 is 7-11 mm. Preferably, the height of the main channel 3 is 10 mm, and the height of the branch channel 4 is 9 mm. The height of the main channel 3 provides initial pressure reserve, and the height of the branch channel 4 forms a pressure release gradient, realizing a flow pattern of high-speed filling-medium-speed transition-low-speed filling, making the molten metal filling smooth and efficient.

[0035] As an example, the diameter of the riser 2 is 58-62 mm, preferably 60 mm; the width of the main runner 3 is 22-26 mm, preferably 24 mm; and the width of the large end of the branch runner 4 is 16-20 mm, preferably 18 mm. The 60 mm diameter of the riser 2 provides a sufficient supply of molten metal, ensuring that the filling pressure remains stable in the range of 0.7-0.9 MPa. The 24 mm width of the main runner 3 and the 18 mm width of the large end of the branch runner 4 form a gradual contraction, so that the molten metal flow rate gradually increases from 2.5-3.0 m / s at the riser 2 to 4.5-5.5 mm / s at the end of the branch runner 4.

[0036] As an example, the longitudinal sections of the riser 2, main runner 3, two branch runners 4, and multiple branch runners 5 are all trapezoidal in shape, with a smaller top and a larger bottom. The trapezoidal cross-section design allows the molten metal to flow naturally, reducing the angle between the flow direction and the wall of cavity 1 by 15°-20°, thus lowering flow resistance.

[0037] As an example, five venting slag bags 6 are provided on one side of the cavity 1 opposite to the gating structure, and three venting slag bags 6 are provided on each side of the cavity 1 adjacent to the gating structure. A total of 11 venting slag bags 6 form a distributed venting network, realizing all-round venting and effectively improving venting efficiency.

[0038] As an example, the exhaust slag bag 6 includes an exhaust channel 61 and a slag collection chamber 62 recessed at the bottom of the exhaust channel 61. The recessed slag collection chamber 62 is designed to effectively capture slag using gravity and centrifugal force, thus efficiently venting the exhaust.

[0039] As an example, a first buffer section with a fillet radius of R9-R11mm is set at the connection between the main channel 3 and the two branch channels 4 respectively; a second buffer section with a fillet radius of R3-R5mm is set at the connection between the branch channel 5 and the two branch channels 4 respectively. This increases the radius of curvature of the molten metal turning and reduces the centrifugal acceleration, which can effectively suppress turbulence and reduce the resistance to the molten metal.

[0040] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0041] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0042] The above provides a detailed description of a novel ship control hull mold casting system provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A novel ship control housing mold casting system characterized by, It includes a gating structure located on one side of the cavity and an venting structure located on the remaining sides of the cavity; The gating structure is stepped and is located at the top of the cavity, higher than the cavity. The gating structure includes a riser, a main runner, two branch runners, and multiple sub-runners connected sequentially along the pouring direction. The two branch runners extend obliquely from the end of the main runner to both sides with gradually narrowing widths. Each of the two branch runners branches out two spaced sub-runners on the side facing the cavity. The height of the sub-runners gradually decreases, and their width gradually increases at the ends. The height of the sub-runners is lower than the height of the branch runners, and the height of the branch runners is lower than the height of the main runner. The venting structure includes multiple venting slag bags spaced apart and connected to the bottom of the outer side of the cavity.

2. The novel ship control hull mold casting system according to claim 1, characterized in that, The two runners are inclined toward one side of the cavity at an angle of 5°-10° along the pouring direction.

3. The novel ship control hull mold casting system according to claim 2, characterized in that, The tilt angle of one of the branch channels is smaller than the tilt angle of the other branch channel.

4. The novel ship control hull mold casting system according to claim 2 or 3, characterized in that, The outlet of the branch channel has an expansion structure on both sides with an inclination angle of 15°-30°.

5. The novel ship control hull mold casting system according to claim 1, characterized in that, The height of the main channel is 8-12mm, and the height of the branch channel is 7-11mm.

6. The novel ship control hull mold casting system according to claim 5, characterized in that, The diameter of the gating and riser is 58-62mm, the width of the main runner is 22-26mm, and the width of the large end of the branch runner is 16-20mm.

7. The novel ship control hull mold casting system according to claim 1, characterized in that, Five venting slag bags are provided on one side of the cavity relative to the gating structure, and three venting slag bags are provided on each side of the cavity adjacent to the gating structure.

8. The novel ship control hull mold casting system according to claim 7, characterized in that, The exhaust slag bag includes an exhaust channel and a slag collection chamber that is set at the bottom of the exhaust channel.

9. The novel ship control hull mold casting system according to claim 1, characterized in that, The main channel is provided with a first buffer section with a rounded corner radius of R9-R11mm at the connection between each of the two branch channels; the branch channel is provided with a second buffer section with a rounded corner radius of R3-R5mm at the connection between each of the two branch channels.

10. The novel ship control hull mold casting system according to any one of claims 1-9, characterized in that, The longitudinal cross-sections of the riser, the main channel, the two branch channels, and the multiple tributary channels are all trapezoidal in shape, with a smaller top and a larger bottom.

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