An ultra-high strength automobile aluminum alloy part die-casting mold

Abstract

The application discloses a super-high-strength automobile aluminum alloy part die-casting die, which comprises a first bottom plate, a second bottom plate, a first mold plate, a second mold plate, a ejector rod mechanism, a cooling mechanism and a gas-assisted demolding assembly, wherein two square blocks are fixedly arranged on the first bottom plate, the first mold plate is fixedly arranged on the square blocks, a positioning rod is fixedly arranged on the first bottom plate, the second bottom plate is slidably connected with the first bottom plate through the positioning rod, the second mold plate is fixedly arranged on the second bottom plate, the ejector rod mechanism is slidably arranged in the first mold plate, the cooling cavity is arranged in the second mold plate, the cooling mechanism is sealingly and rotatably arranged in the cooling cavity, and the gas-assisted demolding assembly is arranged in the first mold plate and the second mold plate.

Description

Technical Field

[0001] This invention relates to the field of metal die casting technology, specifically a die casting mold for ultra-high strength automotive aluminum alloy parts. Background Technology

[0002] With the trend of lightweighting in automobiles, the application of ultra-high strength aluminum alloy die castings is becoming increasingly widespread. However, ultra-high strength die castings also mean that a more precise and stringent die casting environment is required, especially the cooling of the mold during the die casting process and the demolding work after molding.

[0003] Currently, most traditional molds use unidirectional linear cooling channels to cool the mold. In this cooling method, the cooling medium flows along a fixed path, which leads to a large temperature difference on the surface of the cavity, causing gradual local overheating and shrinkage, as well as thermal stress concentration in the mold, reducing its service life. In addition, the cooling speed is slow. At the same time, during demolding, conventional ejector mechanisms usually directly eject the casting mechanically forcibly demolding. Friction will occur between the ejector and the casting, which will cause scratches on the casting and wear on the mold. Therefore, the production efficiency and production quality of castings are not high.

[0004] Therefore, it is necessary to provide an ultra-high strength die-casting mold for automotive aluminum alloy parts to solve the problems mentioned in the background art. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a die-casting mold for ultra-high strength automotive aluminum alloy parts, comprising a first base plate, a second base plate, a first template, a second template, an ejector mechanism, a cooling mechanism, and an air-assisted demolding assembly. The first base plate has two blocks fixedly mounted thereon, the first template is fixedly mounted on the blocks, a positioning rod is fixedly mounted on the first base plate, the second base plate is slidably connected to the first base plate via the positioning rod, the second template is fixedly mounted on the second base plate, an ejector mechanism is slidably mounted in the first template, a cooling cavity is formed in the second template, a cooling mechanism is rotatably mounted in the cooling cavity, and an air-assisted demolding assembly is provided in both the first and second templates.

[0006] Preferably, the cooling mechanism includes a cooling plate, a first water inlet ring, a second water inlet ring, a first drain ring, and a second drain ring. The cooling plate has a first cooling channel and a second cooling channel evenly spaced in a circle. The first water inlet ring and the first drain ring are fixedly disposed on the inner side of the cooling plate, and the second water inlet ring and the second drain ring are fixedly disposed on the outer side of the cooling plate. The first water inlet ring and the first drain ring are respectively connected to the input end and the output end of the first cooling channel, and the second water inlet ring and the second drain ring are respectively connected to the input end and the output end of the second cooling channel.

[0007] Preferably, the second template has a first water inlet cavity, a second water inlet cavity, a first water outlet cavity, and a second water outlet cavity for the first water inlet ring, the second water inlet ring, the first water outlet ring, and the second water outlet ring to rotate in a sealed manner. The outer side of the second water inlet cavity has a plurality of L-shaped water inlet channels circumferentially formed along its tangential direction. The second template also has an annular cavity that communicates with the plurality of L-shaped water inlet channels. The first water inlet cavity, the second water inlet cavity, the first water outlet cavity, the second water outlet cavity, and the annular cavity are all connected to an external cooling circulation mechanism through water supply pipes.

[0008] Preferably, a plurality of blades are fixedly arranged circumferentially on the second water inlet ring, and the height of the blades covers the L-shaped water inlet channel and is less than the width of the second water inlet cavity.

[0009] Preferably, the air-assisted demolding assembly includes multiple air holes, a sealing rod, a hydraulic rod, and a drive rod formed on the outer ring of the second template and the first template. The sealing rod is slidably and rotatably disposed in the air hole. A rectangular hydraulic rod is slidably disposed at the end of the air hole. The drive rod is fixedly disposed at the output end of the hydraulic rod and is slidably connected to the sealing rod. Multiple air supply channels for connecting the air holes and the external air supply mechanism are formed in both the first template and the second template.

[0010] Preferably, the vent has a guide groove inside, which consists of a semi-circular groove and a straight groove;

[0011] A locking block is fixedly installed on the outside of the sealing rod. The locking block is inserted into the guide groove and slides or rotates along the guide groove.

[0012] Preferably, the sealing rod has a spiral groove inside;

[0013] A guide block is fixedly mounted on the drive rod, and the guide block slides along the spiral groove.

[0014] Preferably, the top rod mechanism includes a top plate and top rods, wherein multiple top rods are fixedly disposed on the top plate, and the multiple top rods are slidably disposed on the first template, and a hydraulic cylinder is disposed between the top plate and the first bottom plate.

[0015] Compared with the prior art, the present invention provides an ultra-high strength automotive aluminum alloy die-casting mold, which has the following beneficial effects:

[0016] In this invention, by rotating the cooling mechanism and opening a second cooling channel flowing from the outside to the inside and a first cooling channel flowing from the inside to the outside of the cooling plate, the cooling plate forms a cooling block with a uniform temperature distribution. This allows the cooling mechanism to provide uniform cooling for the mold and casting, and the cooling speed is faster, resulting in higher quality castings and effectively avoiding the problem of gradual quality decline caused by uneven cooling. In addition, the gas-assisted demolding components set in the first and second molds make the demolding of the casting and the mold faster and more convenient, and greatly reduce the damage to the casting during the demolding process, further improving the production quality of the castings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a side view of the overall structure of the present invention;

[0019] Figure 3 for Figure 1 Enlarged schematic diagram of section A in the middle;

[0020] Figure 4 This is a schematic diagram of the internal structure of the second template in this invention;

[0021] Figure 5 This is a schematic diagram of the cooling mechanism in this invention;

[0022] Figure 6 This is a schematic diagram of the sealing rod in this invention;

[0023] In the diagram: 1. First base plate; 11. Block; 12. Positioning rod; 2. Second base plate; 3. First template; 4. Second template; 41. Cooling chamber; 42. First water inlet chamber; 43. Second water inlet chamber; 431. L-shaped water inlet channel; 44. First drainage chamber; 45. Second drainage chamber; 46. Annular cavity; 5. Push rod mechanism; 51. Top plate; 52. Push rod; 6. Cooling mechanism; 61. Cooling plate; 611. Cooling channel one; 612. Cooling channel two; 62. First water inlet ring; 63. Second water inlet ring; 631. Blade; 64. First drainage ring; 65. Second drainage ring; 7. Air-assisted demolding assembly; 71. Air hole; 711. Guide groove; 72. Sealing rod; 721. Locking block; 722. Spiral groove; 73. Hydraulic rod; 74. Drive rod; 741. Guide block. Detailed Implementation

[0024] Please see Figures 1-6In this embodiment of the invention, an ultra-high strength automotive aluminum alloy die-casting mold includes a first base plate 1, a second base plate 2, a first template 3, a second template 4, a push rod mechanism 5, a cooling mechanism 6, and an air-assisted demolding assembly 7. Two blocks 11 are fixedly mounted on the first base plate 1, the first template 3 is fixedly mounted on the blocks 11, a positioning rod 12 is fixedly mounted on the first base plate 1, the second base plate 2 is slidably connected to the first base plate 1 via the positioning rod 12, the second template 4 is fixedly mounted on the second base plate 2, the push rod mechanism 5 is slidably mounted in the first template 3, a cooling cavity 41 is formed in the second template 4, and a cooling mechanism 6 is rotatably mounted in the cooling cavity 41. An air-assisted demolding assembly 7 is provided in both the first template 3 and the second template 4.

[0025] The cooling mechanism 6 includes a cooling plate 61, a first water inlet ring 62, a second water inlet ring 63, a first drain ring 64, and a second drain ring 65. The cooling plate 61 has cooling channels 1 611 and 2 612 evenly spaced in a circle. The first water inlet ring 62 and the first drain ring 64 are fixedly arranged on the inner side of the cooling plate 61, and the second water inlet ring 63 and the second drain ring 65 are fixedly arranged on the outer side of the cooling plate 61. The first water inlet ring 62 and the first drain ring 64 are respectively connected to the input end and the output end of the first cooling channel 611, and the second water inlet ring 63 and the second drain ring 65 are respectively connected to the input end and the output end of the second cooling channel 612.

[0026] The second template 4 has a first water inlet cavity 42, a second water inlet cavity 43, a first water inlet cavity 44, and a second water outlet cavity 45 for the first water inlet ring 62, a second water inlet ring 63, a first water outlet ring 64, and a second water outlet ring 65 to rotate in a sealed manner. The outer side of the second water inlet cavity 43 has a plurality of L-shaped water inlet channels 431 circumferentially formed along its tangential direction. The second template 4 also has an annular cavity 46 that communicates with the plurality of L-shaped water inlet channels 431. The first water inlet cavity 42, the second water inlet cavity 43, the first water outlet cavity 44, the second water outlet cavity 45, and the annular cavity 46 are all connected to an external cooling circulation mechanism through water supply pipes.

[0027] The second water inlet ring 63 has a plurality of blades 631 fixedly arranged in a circular shape. The height of the blades 631 covers the L-shaped water inlet channel 431 and is smaller than the width of the second water inlet cavity 43.

[0028] In practice, when the casting needs cooling after die casting, a cooling medium is introduced into the first water inlet chamber 42 and the second water inlet chamber 43 through an external cooling circulation mechanism. After filling the first water inlet chamber 42 and the second water inlet chamber 43, the cooling medium is transferred from the multiple cooling channels 611 and 612 to the first drain chamber 44 and the second drain chamber 45. The cooling medium then returns to the external cooling circulation mechanism, thereby rapidly cooling the mold and the casting. Before introducing the cooling medium into the second water inlet chamber 43, the cooling medium first fills the annular cavity 46, and then enters the second water inlet chamber 43 through the L-shaped water inlet channel 431. Since the L-shaped water inlet channel 431 runs along the second water inlet chamber 43... Since the cooling medium is tangentially oriented, when it enters the second water inlet chamber 43 from the L-shaped water inlet channel 431, it can drive the blades 631 to rotate along the second water inlet chamber 43, and drive the second water inlet ring 63 and the entire cooling mechanism 6 to rotate. In addition, when the cooling medium flows along the first cooling channel 611, it flows from the inside to the outside of the cooling plate 61, and when it flows along the second cooling channel 612, it flows from the outside to the inside of the cooling plate 61. Therefore, the cooling medium can cool the mold and the casting in both directions. Furthermore, the rotation of the cooling mechanism 6 makes the cooling plate 61 form a cooling block with a uniform temperature distribution, thereby accelerating the cooling speed of the mold and the casting and making the cooling more uniform, effectively improving the quality of the casting.

[0029] Additionally, it should be noted that the cooling mechanism 6 proposed in this invention is not fixed. Figure 5 The shape shown can be adjusted according to the specific mold shape.

[0030] In this embodiment, as Figure 1 , Figure 3 and Figure 6 The air-assisted demolding assembly 7 includes multiple air holes 71, a sealing rod 72, a hydraulic rod 73, and a drive rod 74, which are formed on the outer ring of the second template 4 and the first template 3. The sealing rod 72 is slidably and rotatably disposed in the air hole 71. A rectangular hydraulic rod 73 is slidably disposed at the end of the air hole 71. The drive rod 74 is fixedly disposed at the output end of the hydraulic rod 73 and is slidably connected to the sealing rod 72. Multiple air supply channels for connecting the air holes 71 with an external air supply mechanism are formed in both the first template 3 and the second template 4.

[0031] In addition, the sliding power of the hydraulic rod 73 comes from an external hydraulic drive mechanism, that is, a hydraulic chamber is provided at the end of the air hole 71, and the hydraulic rod 73 slides along this hydraulic chamber in a sealed manner. The hydraulic rod 73 is driven to slide by hydraulic pressure, and the hydraulic rod 73 is rectangular, so it will not rotate when it slides.

[0032] The air hole 71 has a guide groove 711 inside, which is composed of a semi-circular groove and a straight groove;

[0033] The sealing rod 72 is externally fixed with a locking block 721, which is inserted into the guide groove 711 and slides or rotates along the guide groove 711.

[0034] The sealing rod 72 has a spiral groove 722 inside;

[0035] A guide block 741 is fixedly provided on the drive rod 74, and the guide block 741 slides along the spiral groove 722;

[0036] The top rod mechanism 5 includes a top plate 51 and top rods 52. Multiple top rods 52 are fixedly installed on the top plate 51, and the multiple top rods 52 are slidably installed on the first template 3. A hydraulic cylinder is provided between the top plate 51 and the first bottom plate 1.

[0037] During implementation, when demolding is performed after cooling, the hydraulic rod 73 in the second mold plate 4 is first driven to slide. The sliding of the hydraulic rod 73 drives the drive rod 74 to slide along the sealing rod 72. At this time, the guide block 741 slides along the spiral groove 722, causing the sealing rod 72 to rotate. Simultaneously, the locking block 721 rotates along the semi-arc groove in the guide groove 711. When the guide block 741 slides to the end of the spiral groove 722, the locking block 721 rotates into the straight groove, allowing the hydraulic rod 73 to drive the sealing rod 72 to slide, thus preventing the sealing rod 72 from blocking the air hole 71. Subsequently, an external air supply mechanism pulses air into the air hole 71. Nitrogen gas is used to separate the casting from the second mold plate 4. During this process, the sealing rod 71 rotates first and then detaches from the surface of the casting, thus preventing damage to the casting during separation and improving the production quality of the casting. After the second mold plate 4 is detached, the gas-assisted demolding component 7 in the first mold plate 3 is similarly driven to pulse and deliver nitrogen gas, causing the casting to detach from the surface of the first mold plate 3 and the ejector rod 52. Then, the ejector plate 51 is driven to slide and the ejector rod 52 is driven to slide and gradually eject the casting, completing one casting cycle. This method results in higher quality castings, and the mold and casting are cooled uniformly during cooling, further extending the service life of the mold.

[0038] In summary, when this invention is implemented, the rotating cooling mechanism 6 and the cooling channels 612 and 611 (flowing from the outside to the inside and from the inside to the outside) in the cooling mechanism 6 make the cooling plate 61 form a cooling block with uniform temperature distribution. This allows the cooling mechanism 6 to provide uniform cooling for the mold and casting, and the cooling speed is faster, resulting in higher quality castings and effectively avoiding the problem of gradual quality decline caused by uneven cooling. In addition, the gas-assisted demolding assembly 7 in the first mold plate 3 and the second mold plate 4 makes the demolding of the casting and the mold faster and more convenient, and greatly reduces the damage to the casting during the demolding process, further improving the production quality of the casting.

[0039] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A die-casting mold for ultra-high strength automotive aluminum alloy parts, characterized in that: The assembly includes a first base plate (1), a second base plate (2), a first template (3), a second template (4), a push rod mechanism (5), a cooling mechanism (6), and an air-assisted demolding assembly (7). The first base plate (1) has two fixed blocks (11), the first template (3) is fixedly mounted on the blocks (11), a positioning rod (12) is fixedly mounted on the first base plate (1), the second base plate (2) is slidably connected to the first base plate (1) via the positioning rod (12), the second template (4) is fixedly mounted on the second base plate (2), the first template (3) has a sliding push rod mechanism (5), the second template (4) has a cooling chamber (41), and the cooling chamber (41) has a sealed and rotatable cooling mechanism (6). Both the first template (3) and the second template (4) have air-assisted demolding assemblies (7). The cooling mechanism (6) includes a cooling plate (61), a first water inlet ring (62), a second water inlet ring (63), a first drain ring (64), and a second drain ring (65). The cooling plate (61) is provided with a first cooling channel (611) and a second cooling channel (612) evenly spaced in a circle. The first water inlet ring (62) and the first drain ring (64) are fixedly arranged on the inner side of the cooling plate (61), and the second water inlet ring (63) and the second drain ring (65) are fixedly arranged on the outer side of the cooling plate (61). The first water inlet ring (62) and the first drain ring (64) are respectively connected to the input end and the output end of the first cooling channel (611), and the second water inlet ring (63) and the second drain ring (65) are respectively connected to the input end and the output end of the second cooling channel (612). The air-assisted demolding assembly (7) includes multiple air holes (71), a sealing rod (72), a hydraulic rod (73), and a drive rod (74) on the outer ring of the second template (4) and the first template (3). The sealing rod (72) is slidably and rotatably disposed in the air hole (71). A rectangular hydraulic rod (73) is slidably disposed at the end of the air hole (71). The drive rod (74) is fixedly disposed at the output end of the hydraulic rod (73) and is slidably connected to the sealing rod (72). Multiple air supply channels for connecting the air holes (71) and the external air supply mechanism are provided in both the first template (3) and the second template (4).

2. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 1, characterized in that: The second template (4) has a first water inlet cavity (42), a second water inlet cavity (43), a first water inlet cavity (44), and a second water inlet cavity (45) for sealing and rotating the first water inlet ring (62), the second water inlet ring (63), the first water outlet ring (64), and the second water outlet ring (65). The second water inlet cavity (43) has multiple L-shaped water inlet channels (431) circumferentially formed along its tangential direction on its outer side. The second template (4) also has an annular cavity (46) that communicates with the multiple L-shaped water inlet channels (431). The first water inlet cavity (42), the second water inlet cavity (43), the first water outlet cavity (44), the second water outlet cavity (45), and the annular cavity (46) are all connected to the external cooling circulation mechanism through water supply pipes.

3. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 2, characterized in that: The second water inlet ring (63) has a plurality of blades (631) fixedly arranged in a circular shape. The height of the blades (631) covers the L-shaped water inlet channel (431) and is smaller than the width of the second water inlet cavity (43).

4. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 1, characterized in that: The air hole (71) has a guide groove (711) inside, which is composed of a semi-circular groove and a straight groove; The sealing rod (72) is fixedly provided with a locking block (721) on the outside. The locking block (721) is inserted into the guide groove (711) and slides or rotates along the guide groove (711).

5. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 1, characterized in that: The sealing rod (72) has a spiral groove (722) inside; A guide block (741) is fixedly provided on the drive rod (74), and the guide block (741) slides along the spiral groove (722).

6. The ultra-high strength automotive aluminum alloy die-casting mold according to claim 1, characterized in that: The top rod mechanism (5) includes a top plate (51) and top rods (52). Multiple top rods (52) are fixedly arranged on the top plate (51), and the multiple top rods (52) are slidably arranged on the first template (3). A hydraulic cylinder is arranged between the top plate (51) and the first bottom plate (1).

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