Anti-winding diverging cone structure of pressure chamber of die-casting die

Abstract

The utility model relates to the field of die -casting mould especially is a kind of anti gas-rolling shunt cone structure of die -casting mould pressure chamber, including fixed mould plate, movable mould plate, mould core and pouring column;Fixed mould plate is equipped with fixed mould frame by guide pillar I, mould core is located between fixed mould frame and movable mould frame, fixed mould core is installed on fixed mould frame by fixed mould core backing plate, movable mould core position is opposite to fixed mould core, and it is installed on movable mould frame, the pouring column has pressure chamber, and pouring column is installed in fixed mould plate, bottom extends to the side of fixed mould core, fixed mould core and movable mould core between have the cavity that communicates with pressure chamber, the side of movable mould core and the bottom of corresponding pouring column have the anti gas-rolling shunt cone structure that communicates with cavity.The utility model, by setting up anti gas-rolling shunt cone structure, can avoid alloy liquid directly against the scouring of cavity wall, reduce corner turbulence / turbulent flow and gas-rolling generation, avoid the concave pit caused by directly eroding cavity wall, to ensure product pass rate, and improve mould service life.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold technology, specifically to a die casting mold pressure chamber anti-winding gas diversion cone structure. Background Technology

[0002] Components such as end caps require die casting molds and die casting processes during production. In conventional die casting molds, the runners are made at right angles for ease of processing. However, the high-speed, high-pressure molten alloy directly impacts local mold walls, easily causing pits. This can lead to product demolding deformation or material shortages, resulting in low product yield and reduced mold life.

[0003] Furthermore, the domestic die-casting mold industry currently suffers from a widespread problem of air entrapment within the pressure chamber, resulting in a porosity defect rate of 5% to 8% in castings and limiting production efficiency. Although traditional venting groove designs can serve as a solution to the air entrapment problem, they suffer from drawbacks such as complex design structure, high processing costs, and difficult maintenance. Utility Model Content

[0004] The purpose of this invention is to provide a gas diversion cone structure for preventing air entrapment in the pressure chamber of a die-casting mold, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A die-casting mold pressure chamber anti-winding diversion cone structure includes a fixed template, a moving template, a mold core, and a pouring column;

[0007] The fixed template is fitted with a fixed template frame via guide post I;

[0008] The moving template is equipped with mold feet, and the mold feet have guide sleeves for fitting the moving mold frame. The guide post I is fitted inside the guide sleeve.

[0009] The mold core is located between the fixed mold frame and the moving mold frame, and includes a fixed mold core and a moving mold core. The fixed mold core is mounted on the fixed mold frame through a fixed mold core pad, and the moving mold core is positioned opposite to the fixed mold core and is mounted on the moving mold frame.

[0010] The casting column has a pressure chamber and is installed through the fixed template, with its bottom extending to one side of the fixed mold core;

[0011] The fixed mold core and the moving mold core are connected to a cavity that communicates with the pressure chamber;

[0012] One side of the moving mold core and the bottom of the corresponding gating column have an anti-winding air diversion cone structure that communicates with the cavity.

[0013] Furthermore, the anti-winding diversion cone structure includes a diversion cone, the top of which can extend into the pressure chamber at the bottom of the casting column, and the top of the diversion cone has a wavy surface, with a transitional flow channel between the wavy surface and the cavity.

[0014] Furthermore, the flow divider cone is installed on one side of the moving mold core corresponding to the position of the sprue, and its shape is adapted to the shape of the pressure chamber at the bottom of the sprue, both being conical.

[0015] Furthermore, the flow channel has a slope near the wavy surface, and the inner diameter x of the slope is slightly larger than the inner diameter y at the bottom.

[0016] Furthermore, one end of the punch is inserted into the pressure chamber through the top of the gating column, and the side of the gating column near the top has a discharge port that communicates with the pressure chamber.

[0017] Furthermore, a ring bracket is fitted onto the casting column, and the ring bracket is embedded in the fixed mold frame and located on the side close to the fixed mold plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention, through the design of an anti-air entrapment flow divider cone structure, allows the top of the flow divider cone to extend into the pressure chamber at the bottom of the gating column. The top of the flow divider cone has a wavy surface, with a transitional flow channel between the wavy surface and the mold cavity. The flow channel has a slope near the wavy surface, with the inner diameter of the slope slightly larger than the inner diameter at the bottom. This transitional flow channel and its designed slope prevent a 90° bend between the pressure chamber (as the main gating system) and the mold cavity, thus preventing the molten alloy from directly eroding the mold cavity walls, reducing turbulence / turbulence and air entrapment at corners, and preventing direct erosion of the mold walls that could cause pits. This ensures a high product yield and extends the mold's lifespan.

[0020] In this invention, the wave-shaped surface of the flow divider cone is formed by opening a wave groove at the top of the flow divider cone to achieve multi-stage flow guidance design and laminar flow filling. This prevents the alloy liquid from tumbling and generating air entrapment after it is poured into the pressure chamber and hits the flow divider cone, thereby reducing turbulent air entrapment during the process of entering the cavity.

[0021] This invention features a relatively simple die-casting mold design, which helps reduce processing costs, makes maintenance relatively easy, and reduces the clamping force required for casting demolding. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This utility model Figure 1 A schematic diagram of the longitudinal section structure.

[0024] Figure 3This utility model Figure 2 A schematic diagram from another perspective after removing the fixed template.

[0025] Figure 4 This is a schematic diagram of the exploded structure of this utility model.

[0026] Figure 5 This utility model Figure 4 Schematic diagram showing the separation of the central casting column and the casting from the moving mold frame.

[0027] Figure 6 This utility model Figure 5 Another perspective illustration.

[0028] Figure 7 This utility model Figure 1 A schematic diagram of the structure after removing some components.

[0029] Figure 8 This utility model Figure 7 A longitudinal section diagram of the structure after removing some components.

[0030] Figure 9 This utility model Figure 8 A schematic diagram of the structure after removing the fixed mold core pad and the fixed mold core.

[0031] Figure 10 This is a three-dimensional schematic diagram of the present invention after some parts have been removed.

[0032] Figure 11 This utility model Figure 7 The front view after removing a portion of the components.

[0033] Figure 12 This utility model Figure 11 Schematic diagram of sectioning along the middle AA.

[0034] Figure 13 This utility model Figure 12 Another perspective illustration.

[0035] In the diagram: 1-Fixed mold plate, 2-Moving mold plate, 3-Fixed mold frame, 4-Mold foot, 5-Moving mold frame, 6-Gating pillar, 7-Punch, 8-Pour-out port, 9-Ejector pin fixing plate, 10-Ejector pin push plate, 11-Mold foot pad, 12-Ejector pin plate guide pillar, 13-Through hole, 14-Fixed mold core pad, 15-Fixed mold core, 16-Moving mold core, 17-Insertion hole, 18-Casting, 19-Ring bracket, 20-Guide sleeve, 21-Pressure chamber, 22-Flow divider cone, 23-Wave surface, 24-Cavity, 25-Runner, 26-Guide pillar I, 27-Mold locking buckle, 28-Second mold core groove, 29-First mold core groove, 30-Anti-air entrapment flow divider cone structure, 31-Mold ejector pin, 32-Limiting pillar. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] In the description of this utility model, it should be noted that the terms "upper end," "lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Please see Figures 1 to 13 This utility model provides a technical solution:

[0040] Example 1

[0041] A die-casting mold pressure chamber anti-winding diversion cone structure includes a fixed template 1, a moving template 2, a mold core, and a pouring column 6;

[0042] The fixed template 1 is fitted with a fixed template frame 3 via guide pillar I 26;

[0043] The moving template 2 is equipped with a mold foot 4, and the mold foot 4 has a guide sleeve 20 for fitting the moving mold frame 5. The guide post I 26 is fitted inside the guide sleeve 20.

[0044] The mold core is located between the fixed mold frame 3 and the moving mold frame 5, and includes a fixed mold core 15 and a moving mold core 16. The fixed mold core 15 is mounted on the fixed mold frame 3 through a fixed mold core pad 14, and the moving mold core 16 is positioned opposite to the fixed mold core 15 and is mounted on the moving mold frame 5.

[0045] The pouring column 6 has a pressure chamber 21, and the pouring column 6 is installed through the fixed template 1, with its bottom extending to one side of the fixed mold core 15;

[0046] There is a cavity 24 communicating with the pressure chamber 21 between the fixed mold core 15 and the moving mold core 16;

[0047] On one side of the moving mold core 16 and corresponding to the bottom of the pouring column 6, there is an anti - curling gas shunt cone structure 30 communicating with the cavity 24.

[0048] Specifically, the anti - curling gas shunt cone structure 30 includes a shunt cone 22. The top of the shunt cone 22 can extend into the pressure chamber 21 at the bottom of the pouring column 6, and the top of the shunt cone 22 has a wavy surface 23. There is a transition flow channel 25 between the wavy surface 23 and the cavity 24.

[0049] In this embodiment, as Figure 2 and Figure 9 shown, the shunt cone 22 is an overall "convex" - shaped columnar body. The shunt cone 22 is installed on one side of the moving mold core 16 corresponding to the position of the pouring column 6, and its shape is adapted to the shape of the pressure chamber 21 at the bottom of the pouring column 6, both being conical z.

[0050] The moving mold core 16 moves relatively closer to the fixed mold core 15 to complete mold core clamping. After clamping, the top of the shunt cone 22 extends into the pressure chamber 21 at the bottom of the pouring column 6. At this time, the two are adapted and tightly adhered. Due to the conical z fit, there is a draft angle. Moreover, when using the punch 7 to stamp the alloy liquid (such as aluminum liquid) in the pressure chamber 21, it is also convenient for the alloy liquid to flow more completely into the cavity 24.

[0051] In this embodiment, as Figure 12 and Figure 13 shown, after clamping, the punch 7 flushes the alloy liquid from the pressure chamber 21 to the cavity 24 and then forms a casting 18.

[0052] Specifically, as Figure 2 、 Figure 9 、 Figure 11 and Figure 12 shown, the flow channel 25 has a slope near the wavy surface 23, and the inner diameter x of the slope of the slope is slightly larger than the bottom inner diameter y. Through the transition flow channel 25 and the slope designed thereon, a 90° turn between the pressure chamber 21 (as the main runner) and the cavity 24 is avoided. Furthermore, the erosion of the alloy liquid directly against the cavity wall of the cavity 24 can be avoided, reducing the generation of turbulence / turbulence and curling gas at the corner, avoiding the formation of pits caused by direct erosion of the cavity wall, ensuring the product qualification rate, and improving the service life of the mold.

[0053] In this embodiment, the wave-shaped surface 23 of the flow divider cone 22 is formed by opening an M-shaped wave groove at the top of the flow divider cone to realize multi-stage flow guidance design and laminar flow filling, so as to prevent the alloy liquid from rolling and generating air entrapment after it hits the flow divider cone 22 when it is poured into the pressure chamber 21, thereby reducing turbulent air entrapment during the process of entering the cavity 24.

[0054] In this embodiment, the inner diameter x of the slope is slightly larger than the inner diameter y at the bottom. The purpose of this slope design is to prevent difficulty in ejecting the molded casting 18 due to the large draft angle; and to prevent the alloy liquid from spreading when filling the cavity 24 as the cross-sectional area gradually decreases, which also has the effect of preventing air entrapment.

[0055] Specifically, such as Figure 8 As shown, one end of the punch 7 is inserted into the pressure chamber 21 through the top of the sprue 6, and the side of the sprue 6 near the top has a pouring port 8 that communicates with the pressure chamber 21. After the mold is closed, the molten alloy is slowly poured into the pressure chamber 21 from the pouring port 8.

[0056] Specifically, such as Figure 2 As shown, a ring bracket 19 is fitted onto the sprue 6. The ring bracket 19 is embedded in the fixed mold frame 3 and is located on the side closer to the fixed mold plate 1. The ring bracket 19 is embedded in the fixed mold frame 3, and the sprue 6 is installed and fixed to the fixed mold frame 3 through the ring bracket 19.

[0057] Example 2

[0058] As a preferred embodiment, in this embodiment: the fixed mold plate 1 and the moving mold plate 2 are precisely installed on the die casting machine. Since the mold foot 4 has a guide sleeve 20, the moving mold frame 5 is installed with the mold foot 4 by fitting it on the guide sleeve 20. Since the fixed mold frame 3 is installed with the fixed mold plate 1 by fitting the guide post I 26, when the mold is closed / opened, the guide post I 26 is fitted inside the guide sleeve 20 and can slide back and forth relative to the guide sleeve 20.

[0059] Example 3

[0060] As a preferred embodiment, in this case: Figure 1 and Figure 2 As shown, the mold foot 4 is fixed on the mold foot pad 11, and the mold foot pad 11 is installed on the moving mold plate 2. The mold foot pad 11 located between the two mold feet 4 is also equipped with an ejector plate guide post 12, an ejector fixing plate 9, and an ejector push plate 10 on the ejector fixing plate 9. The ejector fixing plate 9 and the ejector push plate 10 are both fitted on the ejector plate guide post 12, wherein the ejector plate guide post 12 is used to guide the ejector push plate 10.

[0061] Limit pins 32 are also fitted on the ejector plate 9 and the ejector plate 10 to control the ejection stroke of the ejector plate 10.

[0062] like Figure 7 and Figure 11As shown, after die casting is completed, the moving mold plate 2 and the fixed mold plate 1 are opened. Driven by the ejection mechanism on the die casting machine, the ejector plate 9 drives the ejector plate 10 to be guided by the ejector plate guide post 12. The mold ejector pin 31 installed on the ejector plate guide post 12 pushes the casting 18 out of the cavity 24 on the moving mold core 16 along the ejector slot c on the moving mold core 16, thereby realizing the demolding of the casting 18 and the removal of the part.

[0063] Example 4

[0064] As a preferred embodiment, in this case: Figure 1 As shown, the fixed mold frame 3 and the moving mold frame 5 also have mold locking buckles 27 on their sides to prevent the fixed mold frame 3 and the moving mold frame 5 from opening during the hoisting of the die casting mold. There are two mold locking buckles 27 symmetrically arranged.

[0065] The fixed mold frame 3 and the moving mold frame 5 are also pre-set with through holes 13 for cooling water pipes to pass through, so as to achieve the purpose of cooling the die casting mold during die casting.

[0066] Example 5

[0067] As a preferred embodiment, in this case: Figure 5 and Figure 6 As shown, the moving mold frame 5 has a first mold core groove 29 for placing the moving mold core, and the fixed mold frame 3 has a second mold core groove 28 for placing the fixed mold core pad 14 and the fixed mold core 15. Simultaneously, the fixed mold frame 3 and the fixed mold plate 1 have insertion holes 17 for the pouring column to pass through. The fixed mold core 15 also has a portion of a fixed mold cavity h, which, together with the cavity 24 on the moving mold core 16, forms a mold cavity for casting 18. That is, the mold cavity h and the cavity 24 form a mold cavity that matches the shape of the casting 18.

[0068] Example 6

[0069] As a preferred embodiment, in this case: Figure 9 and Figure 10 As shown, the moving mold core 16 has a venting groove m, which communicates with the mold cavity. The thickness of the venting groove m does not exceed 0.15mm. The purpose of this design is to ensure that when the punch 7 presses into the pressure chamber 21, the molten alloy flows into the mold cavity 24, expelling excess gas and preventing the molten alloy from seeping out of the mold core through the venting groove m.

[0070] The main components of this utility model work as follows:

[0071] The fixed mold plate 1 and the moving mold plate 2 of the die-casting mold are precisely installed on the die-casting machine, and then the molten alloy is prepared. As the mold closes, the moving mold core 16 and the fixed mold core 15 form the mold core, and the molten alloy in the ladle is slowly poured from the pouring port 8 into the pressure chamber 21 of the gating column 6. During this process, the molten alloy at the front end, after contacting the anti-air entrapment diversion cone 22, will not tumble or create waves, thus avoiding the entrapment of gas. When the punch 7 moves forward and enters the pressure chamber 21, the molten alloy flows into the cavity 24, which also prevents the formation of porosity, ensuring the density and quality of the casting 18.

[0072] During the die casting process, the mold core can be cooled and heat dissipated through the through hole 13, which helps the casting 18 to be die cast. After the die casting is completed, the moving mold plate 2 and the fixed mold plate 1 are opened. Driven by the ejection mechanism on the die casting machine, the ejector plate 9 drives the ejector plate 10 with the ejector plate guide post 12 as the guide. The mold ejector pin 31 installed on the ejector plate guide post 12 pushes the casting 18 out of the cavity 24 on the moving mold core 16 along the ejector slot c on the moving mold core 16, which facilitates the demolding of the casting 18 and the removal of the part.

[0073] In summary, by setting up the flow divider cone 22 to prevent air entrapment, the molten alloy (molten aluminum) flows more smoothly in the pressure chamber 21 of the pouring column 6. For the die casting machine that drives the die casting mold, the machine process parameters are set more simply, which can reduce waste caused by blind trial and error and reduce reliance on experience.

[0074] The inner diameter x of the sloping surface 23 of the wave-shaped surface is slightly larger than the inner diameter y of the bottom. This large-angle equal-width layout is used to connect with the cavity 24, which not only prevents air entrapment but also reduces the demolding clamping force of the casting 18. At the same time, the die-casting mold design structure is relatively simple, which helps to reduce processing costs and is relatively easy to maintain. It enables the casting 18 to be formed in one step using a high-speed die-casting machining center, and the processing accuracy is controlled within ±0.02mm.

[0075] The parts of this utility model not described are existing technologies.

[0076] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas diversion cone structure for preventing air entrapment in the pressure chamber of a die-casting mold, characterized in that, Includes fixed template (1), moving template (2), mold core and pouring column (6); The fixed template (1) is fitted with a fixed template frame (3) via guide post I (26); The moving template (2) is equipped with a mold foot (4), the mold foot (4) has a guide sleeve (20) for fitting the moving mold frame (5), and the guide post I (26) is fitted inside the guide sleeve (20); The mold core is located between the fixed mold frame (3) and the moving mold frame (5), and includes a fixed mold core (15) and a moving mold core (16). The fixed mold core (15) is mounted on the fixed mold frame (3) through a fixed mold core pad (14). The moving mold core (16) is positioned opposite to the fixed mold core (15) and is mounted on the moving mold frame (5). The pouring column (6) has a pressure chamber (21), and the pouring column (6) is installed through the fixed template (1) and extends to one side of the fixed mold core (15); The fixed mold core (15) and the moving mold core (16) have a cavity (24) that communicates with the pressure chamber (21). The moving mold core (16) has an anti-winding diversion cone structure (30) on one side and at the bottom of the corresponding gating column (6) that communicates with the cavity (24).

2. The anti-winding gas diversion cone structure for the pressure chamber of a die-casting mold as described in claim 1, characterized in that, The anti-winding diversion cone structure (30) includes a diversion cone (22), the top of which can extend into the pressure chamber (21) at the bottom of the pouring column (6), and the top of the diversion cone (22) has a wavy surface (23), and there is a transition channel (25) between the wavy surface (23) and the cavity (24).

3. The anti-winding gas diversion cone structure for the pressure chamber of a die-casting mold as described in claim 2, characterized in that, The diversion cone (22) is installed on one side of the moving mold core (16) corresponding to the position of the sprue (6), and its shape is compatible with the shape of the pressure chamber (21) at the bottom of the sprue (6) and is conical.

4. The anti-winding gas diversion cone structure for the pressure chamber of a die-casting mold as described in claim 2, characterized in that, The flow channel (25) has a slope near the wavy surface (23), and the inner diameter of the slope is slightly larger than the inner diameter at the bottom.

5. The anti-winding gas diversion cone structure for the pressure chamber of a die-casting mold as described in claim 1, characterized in that, One end of the punch (7) is inserted into the pressure chamber (21) through the top of the pouring column (6), and the side of the pouring column (6) near the top has a discharge port (8) that communicates with the pressure chamber (21).

6. The anti-winding gas diversion cone structure for the pressure chamber of a die-casting mold as described in claim 1, characterized in that, The casting column (6) is fitted with a ring bracket (19), which is embedded in the fixed mold frame (3) and located on the side close to the fixed mold plate (1).

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