A cage multi-cavity gating system

Abstract

The application discloses a kind of retainer multi-cavity pouring system, including pouring gate, sprue, cross gate and several forming cavities, the both ends of sprue are communicated with pouring gate and cross gate respectively, cross gate is connected with sprue and presents T letter type, several forming cavities are spaced apart and set on the side of cross gate far from pouring gate, cross gate includes first, second runner section located on the left and right of sprue and symmetrically arranged on both sides, first runner section has oppositely arranged first side wall and second side wall, first, second side wall has first included angle between them, and the first included angle is 3-10 °;First runner section is provided with third side wall bending towards sprue at the connecting node with second runner section, second runner section is provided with fourth side wall symmetric with third side wall, and second runner section has second included angle between third and fourth side walls. Aluminum liquid can reach each forming cavity simultaneously, so as to make the quality of die casting product stable, and the qualified rate is high.

Description

Technical Field

[0001] This invention belongs to the field of die casting molds, and specifically relates to a cage multi-cavity gating system. Background Technology

[0002] Currently, engine cages have a simple structure. To improve cage production efficiency, die casting molds with multiple forming cavities are usually used for die casting. Since some forming cavities are located far from the feed inlet, the time it takes for the die casting liquid to reach each forming cavity of the mold is inconsistent during die casting. This results in differences in the internal quality of each product, uneven performance of each product, which is not conducive to the adjustment of product process and also affects the product yield.

[0003] Therefore, a new technology is needed to solve the problem of inconsistent arrival times of the die casting liquid in each cavity during multi-cavity filling in existing technologies. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, the present invention provides a cage multi-cavity gating system, which allows the die-casting liquid to reach each molding cavity simultaneously.

[0005] The present invention adopts the following technical solution:

[0006] A cage multi-cavity gating system includes a gating gate, a sprue, a runner, and a plurality of forming cavities. The two ends of the sprue are respectively connected to the gating gate and the runner. The runner and the sprue are connected in a T-shape. The plurality of forming cavities are spaced apart on the side of the runner away from the gating gate. The runner includes a first runner section and a second runner section located on the left and right sides of the sprue. The first runner section and the second runner section are symmetrically arranged relative to the sprue.

[0007] The width of the first runner section gradually decreases in the direction away from the sprue. The first runner section has a first sidewall and a second sidewall disposed opposite to each other. The first sidewall is close to the molding cavity and the second sidewall is close to the pouring gate. There is a first included angle between the first sidewall and the second sidewall, wherein the first included angle is 3° to 10°.

[0008] The first runner section has a third sidewall that bends toward the sprue at the connection node with the second runner section, and the second runner section has a fourth sidewall that bends toward the sprue at the connection node with the first runner section, with a second included angle between the third sidewall and the fourth sidewall.

[0009] As a further improvement to the technical solution of the present invention, the cross-sectional area of ​​the straight sprue is larger than the cross-sectional area of ​​the horizontal sprue.

[0010] As a further improvement to the technical solution of the present invention, the second included angle is 100°.

[0011] As a further improvement to the technical solution of the present invention, the cross-section of the third sidewall is arc-shaped, the diameter of the arc is 20 mm, and the fourth sidewall and the third sidewall are symmetrically arranged relative to the centerline of the straight sprue.

[0012] As a further improvement to the technical solution of the present invention, it also includes an inner gate corresponding to each of the molding cavities, each of the molding cavities being connected to the horizontal runner through the inner gate, and the area ratio of each pouring gate to the inner gate being 13 to 18.

[0013] As a further improvement to the technical solution of the present invention, the filling angle formed by the connection between the horizontal runner and the ingate is 30°.

[0014] As a further improvement to the technical solution of the present invention, it also includes an exhaust system, which is used to discharge the gas in each of the molding cavities. The exhaust system includes a first exhaust block, a second exhaust block and a plurality of ventilation pipes corresponding to the plurality of molding cavities.

[0015] One end of the vent pipe is connected to a molding cavity located on the left side of the sprue, and the other end is connected to the first vent block;

[0016] One end of the ventilation pipe is connected to a molding cavity located on the right side of the sprue, and the other end is connected to the second venting block.

[0017] As a further improvement to the technical solution of the present invention, the horizontal runner is connected to 6 forming cavities, of which 3 forming cavities are respectively connected to the first runner section, and the other 3 forming cavities are respectively connected to the second runner section, and the ingates located on the left and right sides of the sprue are symmetrically arranged.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The horizontal runner includes a first runner section and a second runner section located symmetrically on the left and right sides of the sprue. The width of the first runner section gradually decreases in the direction away from the sprue. The angle between the first sidewall and the second sidewall in the first runner section is 3 to 10°, which can ensure that the molten aluminum can reach the six-cavity inlet gate at the same time, thereby making the die-casting product quality stable and the pass rate high.

[0020] There is a second included angle between the third and fourth sidewalls on each flow channel section. The setting of this second included angle enables the aluminum liquid to maintain a stable flow distribution when it flows from the sprue to the runner. Attached Figure Description

[0021] The technology of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0022] Figure 1 This is a top view of the overall structure of the present invention;

[0023] Figure 2 This is a bottom view of the overall structure of the present invention;

[0024] Figure 3 This is a cross-sectional view of the overall structure of the present invention;

[0025] Figure 4 This is an X-ray inspection image of a product die-cast using this invention.

[0026] Figure label:

[0027] 1-Gating gate;

[0028] 2-Straight pouring channel;

[0029] 3-Horizontal runner; 31-First runner section; 312-First sidewall; 313-Second sidewall; 314-Third sidewall; 315-First included angle; 32-Second runner section; 321-Fourth sidewall; 33-Second included angle;

[0030] 4- Molding cavity;

[0031] 5-Inner gate;

[0032] 6-Exhaust system; 61-First exhaust block; 62-Second exhaust block; 63-Ventilation pipe;

[0033] 7 - The third included angle. Detailed Implementation

[0034] The following will provide a clear and complete description of the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the accompanying drawings indicate the same or similar parts.

[0035] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "up," "down," "left," and "right" used in this invention are only relative to the relative positional relationships of the various components of the invention in the accompanying drawings.

[0036] Reference Figures 1 to 3A multi-cavity gating system for a gating cage includes a gating port 1, a sprue 2, a runner 3, and several forming cavities 4. The number of forming cavities 4 can be selected according to actual needs. The number and position of the forming cavities on both sides of the sprue are generally symmetrically arranged. The two ends of the sprue 2 are respectively connected to the gating port 1 and the runner 3. The runner 3 and the sprue 2 are connected in a T-shape. The cross-sectional area of ​​the sprue 2 is larger than that of the runner 3. This structure ensures that the molten aluminum is in a uniformly accelerated state during filling. The several forming cavities 4 are spaced apart on the side of the runner 3 away from the gating port 1. The runner 3 includes a first runner section 31 and a second runner section 32 located on the left and right sides of the sprue 2. The first runner section 31 and the second runner section 32 are symmetrically arranged relative to the sprue 2.

[0037] The width of the first runner section 31 gradually decreases in the direction away from the sprue 2. The first runner section 31 has a first sidewall 312 and a second sidewall 313 arranged opposite to each other. The first sidewall 312 is close to the forming cavity 4, and the second sidewall 313 is close to the pouring gate 1. There is a first included angle 315 between the first sidewall 312 and the second sidewall 313. The first included angle 315 is 3° to 10°. The first included angle 315 is the oblique angle of the sprue 3. The first included angle 315 is preferably 5°, which can ensure that the aluminum liquid can reach the six-cavity inlet gate 5 at the same time, thereby making the die-casting product quality stable and the pass rate high.

[0038] The first flow channel section 31 is provided with a third sidewall 314 that bends toward the sprue 2 at the connection node with the second flow channel section 32, and the second flow channel section 32 is provided with a fourth sidewall 321 that bends toward the sprue 2 at the connection node with the first flow channel section 31. The third sidewall 314 and the fourth sidewall 321 have a second included angle 33. This structural arrangement enables the aluminum liquid to maintain a stable flow distribution effect when it flows from the sprue 2 to the gating 3.

[0039] The distance between each molding cavity 4 and the size of the first included angle 315 can be adjusted according to the actual situation. After the aluminum liquid passes through the sprue 2, it splits into two and flows simultaneously to the first runner section 31 and the second runner section 32. The mold runner structure is horizontal. In the low-speed filling stage of the die casting liquid, when the die casting liquid has filled the entire horizontal runner 3, the use of the horizontal runner 3 can ensure that the die casting liquid reaches the ingate 5 of each molding cavity 4 at the same time. This ensures that the filling progress of the die casting liquid in each molding cavity 4 is consistent in the subsequent high-speed filling stage.

[0040] Specifically, the second included angle 33 is 100°, the cross-section of the third sidewall 314 is arc-shaped and the diameter of the arc is 20 mm, and the fourth sidewall 321 and the third sidewall 314 are symmetrically arranged with respect to the centerline of the sprue 2, so that the aluminum liquid maintains a stable flow distribution effect when it flows from the sprue 2 to the gating 3.

[0041] Specifically, the cage multi-cavity gating system of this solution also includes an inner gate 5 corresponding to each of the molding cavities 4. The structure and size of the cross-section of the inner gate 5 can be set according to the actual production situation. Each of the molding cavities 4 is connected to the runner 3 through the inner gate 5. The area ratio of each gating port 1 to the area of ​​the inner gate 5 is 13 to 18.

[0042] Specifically, the filling angle formed by the connection between the horizontal sprue 3 and the inner gate 5 is the third included angle 7, which is 30°. This ensures that the aluminum liquid can be evenly filled into the entire cavity 4 when the die casting liquid is filled at high speed, thereby reducing the generation of air holes.

[0043] Specifically, the multi-cavity gating system for the retainer in this solution also includes an exhaust system 6. The exhaust system 6 is used to discharge the gas in each of the molding cavities 4. The exhaust system 6 includes a first exhaust block 61, a second exhaust block 62, and several ventilation pipes 63 corresponding one-to-one with the molding cavities 4. The first exhaust block 61 and the second exhaust block 62 have the same structure. Each ventilation pipe 63 is used to connect each molding cavity 4 with the first exhaust block 61 or the second exhaust block 62. One end of one ventilation pipe 63 is connected to a molding cavity 4 located on the left side of the sprue 2, and the other end is connected to the first exhaust block 61; one end of another ventilation pipe 63 is connected to a molding cavity 4 located on the right side of the sprue 2, and the other end is connected to the second exhaust block 62.

[0044] Specifically, the horizontal runner 3 is connected to six forming cavities 4, three of which are connected to the first runner section 31, and the other three are connected to the second runner section 32. The ingates 5 on the left and right sides of the sprue 2 are symmetrically arranged. The first venting block 61 and the second venting block 62 have the same structure. Three forming cavities 4 are provided on each side of the centerline of the sprue 2. The three forming cavities 4 on the left share one venting block, and the three forming cavities 4 on the right share one venting block. This ensures smooth venting while facilitating centralized venting on both sides, reducing the use of venting blocks and saving costs. The venting blocks have a wavy structure, with a 0.15mm gap at the end. The area of ​​the venting blocks can be adjusted according to the stress conditions of different equipment tonnages.

[0045] For different types and specifications of retainers, the flow direction of the die casting liquid, such as aluminum liquid, can be observed by combining mold flow analysis. By changing the angle of the horizontal runner 3, adjusting the distance between two adjacent forming cavities 4, and the area of ​​the horizontal runner 3 and the vertical runner 2, the filling progress of the 6 forming cavities 4 can be the same at the same time.

[0046] Example 1

[0047] In practical applications, taking a small cage with dimensions of 50×20×20 mm (length×width×height) as an example, made of aluminum alloy and weighing approximately 20g-30g, the multi-cavity gating system of this design, which uses a die-casting mold with six forming cavities 4, has a sprue 2 width of 38mm, a gating runner 3 width of 28mm, a sprue 2 thickness of 15mm, a gating runner 3 thickness of 8mm, and a sprue 2 cross-sectional area of ​​38×15=570mm². 2 The cross-sectional area of ​​the horizontal gating 3 is 28 × 8 × 2 = 487 mm² 2 This structure ensures that the cross-sectional area of ​​the sprue 2 is larger than that of the runner 3, allowing the molten aluminum to accelerate uniformly during filling. The second included angle 33 is 100°, and the diameter of the arc-shaped cross-section of the third sidewall 314 is 20 mm, maintaining a stable flow distribution of the molten aluminum from the sprue 2 to the runner 3. The first included angle 315 is 5°, ensuring that the molten aluminum can simultaneously reach the six ingates 5. The diameter of the gating gate 1 is preferably 60 mm, the thickness of each ingate 5 is 2.5 mm, and the width of each ingate 5 is 12 mm, ensuring that the ratio of the cross-sectional area of ​​the gating gate 1 to the cross-sectional area of ​​each ingate 5 is 13–18. Furthermore, the filling angle formed by the connection between the runner 3 and the ingates 5 is 30°, ensuring that the molten aluminum is evenly filled into the entire molding cavity 4 during high-speed filling, reducing the formation of porosity.

[0048] Based on the above structural data, when the velocity S of the molten aluminum at the pouring gate 1 is 3.5 m / s, the velocity at the inlet gate 5 is:

[0049] S = S 浇 ×(Cross-sectional area of ​​gating gate 1 / Cross-sectional area of ​​ingate 5) = 3.5 × [3.14 × (60 / 2)] 2 ] / (12×2.5×6)=3.5×2826 / 180=55m / s. Meanwhile, the reasonable filling speed of the ingate 5 is 40~60m / s. According to the calculation results, the filling speed of the ingate 5 is 55m / s, and the speed is reasonable.

[0050] The cage produced by the multi-cavity gating system of this solution is die-cast and has stable quality with a high X-ray pass rate, exceeding 99.5%. Figure 4The image shows the X-ray inspection results of the die-cast product using the gating system of this scheme. The image shows no white spots inside, indicating that there are no pores inside and the quality is qualified.

[0051] When using the multi-cavity gating system for the cage in this design for die casting, the specific data of each structure in the gating system can be adjusted according to different part sizes. The adjustment steps are as follows:

[0052] Based on mold flow analysis, adjust the specific data of each structure, including some or all of the dimensions of the sprue 2, runner 3, gating gate 1, and ingate 5. At the same time, ensure that the cross-sectional area of ​​the sprue 2 is greater than that of the runner 3, and ensure that the cross-sectional area of ​​the gating gate 1 / the cross-sectional area of ​​the ingate 5 = 13 to 18. Adjust the size of the first included angle 315° within the range of 3 to 10°. The area of ​​the venting block is adjusted according to the stress conditions of different equipment tonnages.

[0053] Other aspects of the cage multi-cavity casting system described in this invention can be found in the prior art and will not be repeated here.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A cage multi-cavity gating system characterized by: The system includes a gating gate, a sprue, a runner, and several molding cavities. The sprue connects to the gating gate and the runner at both ends, respectively. The runner and sprue are connected in a T-shape. The molding cavities are spaced apart on the side of the runner away from the gating gate. The runner includes a first runner section and a second runner section located on the left and right sides of the sprue, symmetrically arranged relative to the sprue. The width of the first runner section gradually decreases in the direction away from the sprue. The first runner section has a first sidewall and a second sidewall arranged opposite each other. The first sidewall is close to the molding cavity, and the second sidewall is close to the gating gate. A first angle, 3°~10°, is formed between the first and second sidewalls. At the connection point between the first and second runner sections, a third sidewall bends towards the sprue. At the connection point between the second and first runner sections, a third sidewall bends towards the sprue. The system includes a fourth sidewall that bends toward the sprue, with a second included angle of 100° between the third and fourth sidewalls. It also includes an ingate corresponding to each of the molding cavities, with each cavity connected to the runner via the ingate. The area ratio of each gating gate to the ingate is 13-18. The filling angle formed by the connection between the runner and the ingate is 30°. Furthermore, it includes an exhaust system for venting gas from each molding cavity. The exhaust system includes a first exhaust block, a second exhaust block, and several ventilation pipes corresponding to each molding cavity. One end of one ventilation pipe is connected to a molding cavity located to the left of the sprue, and the other end is connected to the first exhaust block. One end of another ventilation pipe is connected to a molding cavity located to the right of the sprue, and the other end is connected to the second exhaust block. The exhaust block has a wavy structure, with a 0.15mm gap at its end.

2. The cage multi-cavity gating system according to claim 1, characterized in that: The cross-sectional area of ​​the sprue is larger than that of the glide sprue.

3. The cage multi-cavity gating system according to claim 1, characterized in that: The third sidewall has an arc-shaped cross-section with a diameter of 20 mm, and the fourth sidewall is symmetrically arranged with respect to the centerline of the straight gating system relative to the third sidewall.

4. The cage multi-cavity gating system according to claim 1, characterized in that: The horizontal runner is connected to 6 forming cavities, of which 3 forming cavities are connected to the first runner section and the other 3 forming cavities are connected to the second runner section. The ingates located on the left and right sides of the sprue are symmetrically arranged.

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