Die-casting die

Abstract

The utility model provides a die-casting die, which belongs to the field of die-casting dies and comprises a base, a fixed die is mounted on the base, a movable die matched with the fixed die is arranged above the fixed die, and bent pipe cavities are arranged on the fixed die and the movable die; when the movable mold drives the lock column to move downwards, the sliding block and the mold columns can be driven to move, the mold columns are matched, when the two matched mold columns abut against each other, a pipe bending mold column smaller than the pipe bending cavity is formed, and when the movable mold moves upwards, the sliding block and the mold columns can move to be separated from the pipe bending cavity. The mold columns abut against the bent position of the pipe bending cavity so that the mold columns can be separated and matched conveniently, the forming quality of a bent pipe can be ensured, in the upward moving process of the movable mold, the locking columns slide in the through holes of the sliding blocks, drive the sliding blocks to move and drive the mold columns to move to be separated from the pipe bending cavity, demolding of the mold columns is facilitated, and the mold column is prevented from being damaged. And a guide column and a positioning bulge are arranged, so that stable matching of the movable mold and the fixed mold can be ensured, and the forming quality of the bent pipe is ensured.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold technology, and in particular to a die casting mold. Background Technology

[0002] In the manufacturing industry, cast aluminum pipe bends are an important component widely used in many fields such as automobiles, aerospace, and machinery manufacturing. With the continuous development of industrial technology and the increasing demands for product quality, higher requirements are being placed on the forming precision, production efficiency, and quality stability of cast aluminum pipe bends.

[0003] The current drawbacks of aluminum die-casting molds for bending pipes are as follows: After casting, the design of the mold pillars leads to poor demolding after the pipe is formed. Furthermore, in traditional die-casting molds for bending pipes, it is difficult to guarantee the alignment accuracy of the moving mold and the fixed mold during mold opening and closing. The moving mold is prone to misalignment during movement, resulting in inaccurate mold closing between the moving and fixed molds. This prevents the two bending pipe cavities from precisely aligning, causing defects such as dimensional deviations and uneven wall thickness in the formed pipe, severely affecting the quality and performance of the pipe and reducing the product's qualification level.

[0004] Therefore, this application proposes a die-casting mold. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides a die casting mold.

[0006] An embodiment of this utility model provides a die-casting mold, comprising:

[0007] A base, on which a fixed mold is mounted, and above the fixed mold is a matching movable mold, and both the fixed mold and the movable mold are provided with curved tube cavities;

[0008] A pipe bending die casting assembly includes three sets of sliders that slide on a fixed mold. Each of the three sets of sliders has a mold column fixed on it. An inclined locking column is fixed on the moving mold. The locking column passes through the slider and cooperates with it. When the moving mold moves the locking column downward, it can drive the slider and the mold column to move, so that the mold columns cooperate. When the two cooperating mold columns abut against each other, a pipe bending mold column smaller than the pipe bending cavity is formed. When the moving mold moves upward, it can move the slider and the mold column to move away from the pipe bending cavity.

[0009] Furthermore, a slidingly mounted top post is provided through the fixed mold, and the top post can drive the moving mold to move.

[0010] Furthermore, the upper end of the fixed mold is provided with a guide groove, and the bottom of the moving mold is fixed with a guide post, which can slide in the guide groove.

[0011] Furthermore, the fixed mold has a positioning groove at its upper end and a positioning protrusion at the bottom of the moving mold, the positioning protrusion cooperating with the positioning groove.

[0012] Furthermore, the upper end of the fixed mold is provided with an injection channel, which is connected to the curved tube cavity.

[0013] Furthermore, a casting pipe is provided through the moving mold, and a casting groove head communicating with the injection channel is provided on the fixed mold, and the casting pipe can be sleeved on the outside of the casting groove head.

[0014] Furthermore, the slider is provided with an inclined through hole, and the locking pin is slidably disposed through the through hole.

[0015] Furthermore, the moving mold has a serpentine heat exchange channel inside, and the upper end of the moving mold has two threaded holes that communicate with the serpentine heat exchange channel.

[0016] Furthermore, the fixed mold is provided with multiple overflow grooves, which are connected to the curved pipe cavity.

[0017] Furthermore, the two mold pillars abut at the bend in the tube cavity, as shown in the figure, so that the separation and engagement of the mold pillars can ensure the quality of the tube bending process.

[0018] Furthermore, the fixed mold is provided with a sliding groove, and two limiting blocks are fixed in the sliding groove. The limiting blocks and the sliding groove form a T-shaped limiting groove, and the bottom of the slider is T-shaped and slides in the limiting groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting a guide groove on the upper end of the fixed mold to cooperate with the guide post at the bottom of the moving mold, and by setting a positioning groove to cooperate with the positioning protrusion at the bottom of the moving mold, it is possible to ensure that the moving mold and the fixed mold are accurately aligned during the mold closing process, avoid defects in the die casting due to alignment deviation, and greatly improve the forming quality and product qualification rate of the bent pipe.

[0021] 2. The slider is mounted on the fixed mold. A limit block is fixed in the guide groove of the fixed mold, forming a T-shaped limit groove with the guide groove. The bottom of the slider is T-shaped and slides within the limit groove. This design ensures that the slider can slide stably, avoiding deviation or wobbling during the sliding process, thereby ensuring the movement accuracy of the mold column, improving the forming quality of the bending mold column, and extending the service life of the mold.

[0022] 3. Multiple overflow channels connected to the bending cavity are provided to accommodate excess molten aluminum and gas, ensuring that the molten aluminum can completely fill the bending cavity, thereby further improving the quality of the formed bending tube.

[0023] 4. A serpentine heat exchange channel is installed inside the moving mold and connected to an external connector via threaded holes, allowing cooling water to circulate within the channel. This design ensures sufficient heat exchange between the cooling water and the moving mold, improving cooling efficiency, shortening the die-casting cycle, and increasing production efficiency. Simultaneously, the flow rate and temperature of the cooling water can be precisely controlled according to the requirements of the die-casting process, ensuring the performance and quality of the formed bent pipe.

[0024] 5. The two mold pillars abut at the bends in the tube cavity to facilitate the separation and engagement of the mold pillars, ensuring the quality of the tube bending process. During the upward movement of the moving mold, the locking pillar slides within the through hole of the slider and drives the slider to move, causing the mold pillars to move away from the tube cavity, which facilitates the demolding of the mold pillars without the need for additional power equipment.

[0025] The mold pillars of this invention abut against each other at the bend in the tube cavity to facilitate the separation and engagement of the mold pillars, thus ensuring the quality of the tube bending process. During the upward movement of the moving mold, the locking pillar slides within the through hole of the slider and drives the slider to move, thereby moving the mold pillars away from the tube cavity, which is beneficial for the demolding of the mold pillars. Furthermore, the setting of guide pillars and positioning protrusions ensures the stable engagement of the moving mold and the fixed mold, ensuring the quality of the tube bending process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a die-casting mold described in an embodiment of this utility model.

[0027] Figure 2 This is a front view of a die-casting mold as described in an embodiment of this utility model.

[0028] Figure 3 This is a bottom view of the moving mold in a die-casting mold as described in an embodiment of this utility model.

[0029] Figure 4 This is a schematic diagram of a serpentine heat exchange channel in a die-casting mold as described in an embodiment of this utility model.

[0030] Figure 5 This is a top view of the fixed mold in a die-casting mold according to an embodiment of the present utility model.

[0031] Figure 6 This is a side view of the fixed mold in a die-casting mold according to an embodiment of the present utility model.

[0032] In the above attached diagram: 1. Base, 2. Fixed mold, 3. Top pillar, 4. Moving mold, 5. Guide pillar, 6. Casting pipe, 7. Locking pillar, 8. Threaded hole, 9. Slider, 10. Forming bend, 11. Guide groove, 12. Positioning groove, 13. Positioning protrusion, 14. Storage groove, 15. Bend cavity, 16. Serpentine heat exchange channel, 17. Injection channel, 18. Slide groove, 19. Limiting block, 20. Mold pillar, 21. Overflow groove. Detailed Implementation

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0034] like Figures 1-6 As shown, this utility model embodiment proposes a die-casting mold, comprising:

[0035] The base 1 serves as the supporting foundation for the entire mold, ensuring its stability during the die-casting process. The fixed mold 2 is mounted on the base 1, and the moving mold 4 cooperates with the fixed mold 2 to complete the die-casting process of the aluminum cast tube. The upper end of the fixed mold 2 is equipped with several key structures, such as the ejector pins 3. The ejector pins 3 penetrate the fixed mold 2 and are slidably positioned, driven by hydraulic cylinders, and there are four of them.

[0036] The ejector pin 3 is fixedly connected to the moving mold 4. The main function of the ejector pin 3 is to drive the moving mold 4 to move, realizing the opening and closing action between the fixed mold 2 and the moving mold 4. The ejector pin 3 is driven by a hydraulic cylinder, which has the advantages of strong power and precise control, ensuring that the opening and closing action between the moving mold 4 and the fixed mold 2 is smooth and reliable, meeting the requirements of the die casting process.

[0037] The guide groove 11 is located at the upper end of the fixed mold 2 and works in conjunction with the guide post 5 at the bottom of the moving mold 4. The guide post 5 can slide within the guide groove 11, which guides the movement of the moving mold 4, ensuring accurate alignment between the moving mold 4 and the fixed mold 2 during the mold closing process, and avoiding defects in the die casting due to alignment deviation.

[0038] The positioning groove 12 is also located at the upper end of the fixed mold 2, and cooperates with the positioning protrusion 13 at the bottom of the moving mold 4. The cooperation between the positioning protrusion 13 and the positioning groove 12 further improves the mold closing accuracy of the fixed mold 2 and the moving mold 4, ensuring that the two bending cavities can be accurately aligned to form a complete bending shape, thus providing a guarantee for the precise forming of aluminum cast bending pipes.

[0039] The casting pipe 6 passes through the moving mold 4 and is fixedly installed. The fixed mold 2 is provided with a casting groove head that communicates with the injection channel 17. The casting pipe 6 can be fitted over the outside of the casting groove head. Molten aluminum can be injected into the injection channel 17 through the casting pipe 6. The design of the casting pipe 6 should ensure that the molten aluminum can flow smoothly and stably into the injection channel 17, and that there will be no leakage or other problems during the casting process.

[0040] The die-casting assembly for pipe bending is a key component for achieving pipe bending, and mainly includes sliders, mold pillars, and locking pillars.

[0041] The slider 9 is slidably mounted on the fixed mold 2, and the bottom of the moving mold 4 is provided with a receiving groove 14 for accommodating the slider 9. The fixed mold 2 is provided with a sliding groove 18, and two limiting blocks 19 are fixed in the sliding groove 18. The limiting blocks 19 and the sliding groove 18 form a T-shaped limiting groove. The bottom of the slider 9 is T-shaped and slides in the limiting groove. This design ensures that the slider 9 can slide stably, avoiding deviation or shaking of the slider 9 during the sliding process, thereby ensuring the movement accuracy of the mold column 20 and thus ensuring the forming quality of the bent tube mold column.

[0042] The mold pillar 20 is fixed on three sets of sliders 9. When the moving mold 4 moves the locking pillar 7 downward, it can drive the sliders 9 and the mold pillar 20 to move (the distribution of the mold pillar 20 and the sliders 9 is as follows). Figure 5 (As shown). When the two mold pillars 20 abut against each other, a bent pipe mold pillar smaller than the bent pipe cavity 15 is formed. When the moving mold 4 moves upward, the slider 9 and the mold pillar 20 move away from the bent pipe cavity 15. The mold pillar 20 should be made of high-strength, wear-resistant material to ensure that it is not easily worn during multiple die casting processes and to ensure the dimensional accuracy and surface quality of the bent pipe mold pillar.

[0043] The two mold pillars 20 abut at the bend in the curved tube cavity 15, as follows: Figure 5 As shown, this ensures the quality of pipe bending by separating and fitting the mold columns.

[0044] The locking pin 7 is fixed to the moving mold 4 and is inclined, passing through the slider 9 and engaging with it. The slider 9 has an inclined through hole, through which the locking pin 7 slides. This ensures that the slider 9 can be accurately driven to move during the movement of the moving mold 4, realizing the engagement and disengagement of the mold pin 20.

[0045] The injection channel 17 is located at the upper end of the fixed mold 2 and is connected to the bent tube cavity 15. The molten aluminum injected through the casting pipe 6 enters the bent tube cavity 15 through the injection channel 17. The shape and size of the injection channel 17 should be designed according to the flow characteristics of the molten aluminum and the requirements of the die casting process to ensure that the molten aluminum can fill the bent tube cavity 15 evenly and quickly, and avoid defects such as porosity and shrinkage cavities.

[0046] The fixed mold 2 is equipped with multiple overflow channels 21, which are connected to the bending cavity. The function of the overflow channels 21 is to accommodate excess molten aluminum and gas during the process of filling the bending cavity 15 with molten aluminum, ensuring that the molten aluminum can completely fill the bending cavity 15 and improving the quality of the formed bending tube 10. The position and capacity of the overflow channels 21 should be reasonably set according to the structure of the bending cavity 15 and the flow of molten aluminum.

[0047] The moving mold 4 has a serpentine heat exchange channel 16 inside, and two threaded holes 8 communicating with the serpentine heat exchange channel 16 are passed through its upper end. The threaded holes 8 can be threadedly connected to external connectors. Cooling water is injected into the threaded holes 8 and flows within the serpentine heat exchange channel 16, thereby exchanging heat with the moving mold 4 and facilitating the cooling of the formed bent tube 10. An external water pump and circulating water tank are installed and connected to the connector through pipes, ensuring that cooling water circulates within the serpentine heat exchange channel 16. The design of the serpentine heat exchange channel 16 should ensure that the cooling water can fully exchange heat with the moving mold 4, improving cooling efficiency and shortening the die-casting cycle. At the same time, the flow rate and temperature of the cooling water should be precisely controlled according to the requirements of the die-casting process to ensure the performance and quality of the formed bent tube 10.

[0048] In addition, molds should be cleaned, lubricated, inspected, and maintained regularly to promptly identify and address problems that arise during use, such as wear and cracks. Simultaneously, mold usage records should be established to document usage details, maintenance history, and other information, providing a basis for mold management and optimization.

[0049] Mold opening preparation stage: In the initial state, the moving mold 4 and the fixed mold 2 are separated. At this time, the slider 9 is in a specific position on the fixed mold 2, the mold pillar 20 has not entered the bent tube cavity 15, the locking pillar 7 cooperates with the slider 9 but does not push the slider 9, the top pillar 3 is in the initial position, and the guide pillar 5 and the guide groove 11, the positioning protrusion 13 and the positioning groove 12 are all in a separated state.

[0050] Moving mold 4: The hydraulic cylinder drives the ejector pin 3. Since the ejector pin 3 is fixedly connected to the moving mold 4, the movement of the ejector pin 3 causes the moving mold 4 to move towards the fixed mold 2. During the movement of the moving mold 4, the guide pin 5 at the bottom of the moving mold 4 slides in the guide groove 11 at the upper end of the fixed mold 2, which guides the movement of the moving mold 4 and ensures the smoothness and directional accuracy of the movement of the moving mold 4. At the same time, the positioning protrusion 13 at the bottom of the moving mold 4 gradually approaches the positioning groove 12 at the upper end of the fixed mold 2. When the positioning protrusion 13 and the positioning groove 12 are fully engaged, the mold closing accuracy of the fixed mold 2 and the moving mold 4 is further improved, ensuring that the two bending cavities 15 can be accurately aligned, preparing for the subsequent precise forming of the aluminum cast bending tube.

[0051] During the movement of the moving mold 4, the locking pin 7 drives the slider 9 to slide within the groove 18 on the fixed mold 2 through its engagement with the through hole. Two limiting blocks 19 fixed within the groove 18 form a T-shaped limiting groove with the groove 18. The bottom of the slider 9 is T-shaped and slides within the limiting groove. This design ensures that the slider 9 can slide stably, preventing it from shifting or wobbling during the sliding process. The three sets of sliders 9 drive the mold pins 20 fixed on them to move. When the two engaging mold pins 20 abut against each other, a bent tube mold pin smaller than the bent tube cavity 15 is formed. At this time, the fixed mold 2 and the moving mold 4 complete the mold closing, forming a complete bent tube forming cavity, such as... Figure 5As shown.

[0052] Molten aluminum is injected into the injection channel 17 through the casting pipe 6, and then enters the bent tube cavity 15 through the injection channel 17. The shape and size of the injection channel 17 are designed according to the flow characteristics of molten aluminum and the requirements of the die casting process to ensure that the molten aluminum can fill the bent tube cavity 15 evenly and quickly, and to avoid defects such as porosity and shrinkage cavities.

[0053] The fixed mold 2 is provided with multiple overflow channels 21 that communicate with the bending cavity 15. During the process of filling the bending cavity 15 with molten aluminum, the overflow channels 21 contain excess molten aluminum and gas, ensuring that the molten aluminum can completely fill the bending cavity 15 and improve the quality of the formed bending tube. The position and capacity of the overflow channels 21 are reasonably set according to the structure of the bending cavity 15 and the flow of molten aluminum.

[0054] After the molten aluminum fills the bending cavity 15, it is threadedly connected to an external connector through the threaded hole 8. Cooling water is injected into the threaded hole 8 and flows within the serpentine heat exchange channel 16, thereby exchanging heat with the moving mold 4 and facilitating the cooling of the formed bending tube. The design of the serpentine heat exchange channel 16 ensures that the cooling water can fully exchange heat with the moving mold 4, improving cooling efficiency and shortening the die-casting cycle. Simultaneously, the flow rate and temperature of the cooling water are precisely controlled according to the requirements of the die-casting process to ensure the performance and quality of the formed bending tube.

[0055] After the molten aluminum cools and solidifies, the hydraulic cylinder drives the ejector pin 3 to move in the opposite direction, causing the moving mold 4 to move upward. During the upward movement of the moving mold 4, the locking pin 7 slides within the through hole of the slider 9, driving the slider 9 to move and causing the mold pin 20 to move away from the bending tube cavity 15, that is, to disengage from the forming bending tube 10, returning to its initial position. The forming bending tube 10 then... Figure 1 As shown.

[0056] After the moving mold 4 and the fixed mold 2 are completely separated, the operator can use tools or a robotic arm to remove the formed bent tube 10 from the fixed mold 2, completing one die-casting process. Afterwards, the mold enters the mold opening preparation stage again, waiting for the next die-casting operation.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A die-casting mold, characterized in that, include: A base (1) is provided with a fixed mold (2) installed on the base (1), and a moving mold (4) is provided above the fixed mold (2). The fixed mold (2) and the moving mold (4) are provided with bent tube cavities (15). A pipe bending die casting assembly; the pipe bending die casting assembly includes three sets of sliders (9) sliding on a fixed mold (2), each set of sliders (9) is fixed with a mold column (20), and the moving mold (4) is fixed with an inclined locking column (7). The locking column (7) passes through the slider (9) and is configured to cooperate with it. When the moving mold (4) drives the locking column (7) to move down, it can drive the slider (9) and the mold column (20) to move, so that the mold column (20) cooperates. When the two cooperating mold columns (20) abut against each other, a pipe bending mold column smaller than the pipe bending cavity (15) is formed. When the moving mold (4) moves up, it can cause the slider (9) and the mold column (20) to move away from the pipe bending cavity (15).

2. The die-casting mold according to claim 1, characterized in that, in: The fixed mold (2) is provided with a sliding top post (3), which can drive the moving mold (4) to move.

3. The die-casting mold according to claim 1, characterized in that, in: The fixed mold (2) has a guide groove (11) at its upper end, and the moving mold (4) has a guide post (5) fixed at its bottom. The guide post (5) can slide in the guide groove (11).

4. A die-casting mold according to claim 1, characterized in that, in: The fixed mold (2) has a positioning groove (12) at its upper end, and the moving mold (4) has a positioning protrusion (13) at its bottom. The positioning protrusion (13) cooperates with the positioning groove (12).

5. A die-casting mold according to claim 1, characterized in that, in: The upper end of the fixed mold (2) is provided with an injection channel (17), which is connected to the curved tube cavity (15).

6. A die-casting mold according to claim 5, characterized in that, in: The moving mold (4) is provided with a casting pipe (6) through it, and the fixed mold (2) is provided with a casting groove head that communicates with the injection channel (17). The casting pipe (6) can be fitted over the outside of the casting groove head.

7. A die-casting mold according to claim 1, characterized in that, in: The slider (9) has an inclined through hole, and the locking pin (7) slides through the through hole.

8. A die-casting mold according to claim 1, characterized in that, in: The moving mold (4) has a serpentine heat exchange channel (16) inside, and the upper end of the moving mold (4) has two threaded holes (8) that communicate with the serpentine heat exchange channel (16).

9. A die-casting mold according to claim 1, characterized in that, in: The fixed mold (2) is provided with multiple overflow grooves (21), and the overflow grooves (21) are connected to the curved tube cavity (15).

10. A die-casting mold according to claim 1, characterized in that, in: The fixed mold (2) is provided with a slide groove (18), and two limiting blocks (19) are fixed in the slide groove (18). A T-shaped limiting groove is formed between the limiting blocks (19) and the slide groove (18). The bottom of the slider (9) is T-shaped and slides in the limiting groove.

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