Die-casting die for aluminum alloy shell of light-weight gearbox

Abstract

The invention discloses a light-weight gearbox aluminum alloy shell die-casting die, and relates to the field of shell die-casting, the light-weight gearbox aluminum alloy shell die-casting die comprises a base, a lower die and an upper die, the lower die and the upper die are located above the base, a preheating bottom die is arranged between the lower die and the base, a guide rod is fixed on the side of the preheating bottom die, the guide rod penetrates through the lower die and the upper die, and the lower die and the upper die are arranged on the base. The preheating bottom die is fixedly connected with the base, a heat conduction groove is formed below the preheating bottom die, and a heating plate is attached to the interior of the heat conduction groove. According to the die-casting die for the aluminum alloy shell of the light-weight gearbox, the preheating bottom die is heated through the heating plate, so that the preheating bottom die and the lower die can be preheated, and when heat dissipation and cooling are needed subsequently, the heating plate is disconnected from the preheating bottom die, so that heat dissipation can be conducted on the preheating bottom die, heat dissipation does not affect heat on the heating plate, and the heat dissipation efficiency is improved. And the heating plate can conveniently and continuously preheat the product subsequently, more energy is saved, and the lower mold can move on the preheating bottom mold to assist in demolding of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of housing die-casting, and in particular to a die-casting die for a lightweight gearbox aluminum alloy housing. Background Art

[0002] When processing gearbox housings of motorcycles, etc., die-casting can be used to obtain castings. Common housing casting materials are mostly lightweight aluminum alloys. Current die-casting molds also disclose related housing die-casting processing methods.

[0003] Prior art 1 (application number CN202420919113.0, Chinese patent published on January 17, 2025) A die-casting mold for an engine oil pump housing, relating to the field of mold manufacturing, including a base and a guide column fixedly installed on the top of the base, the top of the base is fixedly installed with a lower mold body, the outside of the guide column is movably installed with an upper mold body, the top of the base is fixedly installed with an ejection assembly, the ejection assembly is located at the bottom of the lower mold body, and connecting plates are slidably installed on the left and right sides of the base, and a cooling assembly is fixedly installed on the top of the connecting plate. The application is provided with an ejection assembly located at the bottom of the lower mold body. After the guide column and the lower mold body are combined for die-casting, the ejection assembly is controlled by operation to make the ejection assembly active, and the ejection assembly drives the part located at the bottom of the lower mold body to move upward to lift the oil pump housing located in the lower mold body upward, thereby facilitating the separation of the oil pump housing from the lower mold body, increasing the speed of ejection and stripping, and improving processing efficiency. ; Prior art 2 (application number CN202411159791.2, Chinese patent published on November 15, 2024) A die-casting mold for an aluminum alloy shell of an automotive structural part. The present invention relates to the field of die-casting mold technology. During the injection process, the material between the injection nozzle and the shell molding cavity is not completely separated. After cooling, the material at the connection between the injection nozzle and the molding cavity is cooled and shaped at the same time, resulting in adhesion between the molded shell and the material in the injection pipe, causing blockage of the injection pipe. Therefore, after stopping the injection, the baffle and the cavity cylinder are reset and moved upward, and the excess material is overlapped through the gap to separate the material in the molding cavity from the material in the injection pipe, avoiding adhesion between the material in the pipe and the material in the molding cavity after cooling, causing blockage of the injection pipe and increased difficulty in demolding. At the same time, the insulation ring blocks the internal heat from being conducted to the cooling cavity, keeping the material in the injection pipe within a stable temperature range when cooling the material in the molding cavity.

[0004] When current die-casting molds are in use, they can be preheated to improve the die-casting quality. However, after the subsequent die-casting is completed, the mold needs to be cooled, resulting in the heat of the preheating heating module also being dissipated. Subsequently, preheating and reheating are required, which increases energy consumption. In addition, when demolding, the product is ejected by structures such as the ejector pin. Due to the small ejection force area, the product is easily damaged during ejection. Summary of the Invention

[0005] The purpose of the present invention is to provide a lightweight gearbox aluminum alloy housing die-casting mold to solve the problem raised in the above background technology that the current die-casting mold needs to dissipate heat from the mold after subsequent die-casting is completed, resulting in the heat of the preheating heating module also being dissipated. Subsequently, it needs to be preheated again and reheated, and the product is ejected by structures such as the ejector rod during demolding. Due to the small ejection force area, the product is easily damaged during ejection.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a lightweight gearbox aluminum alloy housing die-casting mold, comprising a base, a lower mold and an upper mold, the lower mold and the upper mold are located above the base, a preheating bottom mold is arranged between the lower mold and the base, a guide rod is fixed to the side of the preheating bottom mold, the guide rod passes through the lower mold and the upper mold, the preheating bottom mold and the base are fixedly connected, and a heat conduction groove is arranged below the preheating bottom mold, a heating plate is fitted inside the heat conduction groove, a mounting seat is connected below the heating plate, and a lifting controller is connected below the mounting seat, the lifting controller controls the vertical movement of the heating plate so that the heating of the preheating bottom mold can be disconnected, a demolding auxiliary mechanism is arranged on the outside of the lower mold, the demolding auxiliary mechanism is used to control the vertical sliding of the lower mold along the guide rod, and a clamping mechanism is arranged on the outside of the lower mold to press the lower mold against the surface of the preheating bottom mold during die-casting.

[0007] To further optimize the technical solution, a heat dissipation channel is provided inside the preheating bottom mold to assist in heat dissipation of the preheating bottom mold.

[0008] Further optimizing the technical solution, the demoulding auxiliary mechanism includes a mounting block, an upper push mechanism and a lower pull-down reset mechanism;

[0009] The mounting blocks are arranged on the outside of the lower mold and are symmetrically distributed about the center of the lower mold.

[0010] The lifting mechanism is arranged on the outside of the mounting block to provide lifting control for the mounting block;

[0011] The pull-down reset mechanism is connected to the mounting block to control the downward movement and reset of the mounting block.

[0012] Further optimizing this technical solution, the lifting mechanism includes an upper lifting block and a control frame;

[0013] The upper top block is arranged on the rear side of the mounting block, and the upper part of the upper top block is designed in an inclined structure;

[0014] The control frame is fixedly connected to the upper top block, and a front-to-back sliding structure is formed between the control frame and the base.

[0015] Further optimizing the technical solution, the pull-down reset mechanism includes a pull-down rod, a clamping slot, a first spring, a clamping block, a second spring and a movable plate;

[0016] The lower pull rod passes through the mounting block and forms a nested connection between the mounting blocks, and the lower end of the lower pull rod is located inside the base and between the base to form an up and down sliding structure;

[0017] A card slot is provided inside the lower pull rod;

[0018] A first spring is provided at the lower end of the lower pull rod to provide a downward thrust for the lower pull rod;

[0019] The card block is arranged inside the mounting block and between the mounting blocks to form a front-back sliding structure, and the card block and the card slot form a locking structure;

[0020] A second spring is provided on the outside of the card block to provide a backward thrust to the card block;

[0021] The movable plate is fixed at the rear end of the clamping block, and the rear side surface of the movable plate is in contact with the upper top block.

[0022] To further optimize the technical solution, a detachable connection is formed between the mounting block and the lower mold, and the mounting block is made of a heat-insulating material.

[0023] To further optimize the technical solution, a connecting groove is provided on the inner side of the mounting block, the front end of the connecting groove is designed as an open structure, and a connecting block is slidably connected to the inside of the connecting groove, forming a fixed connection between the connecting block and the lower mold.

[0024] Further optimizing the technical solution, the clamping mechanism includes a lower pressing block, a driving frame and an automatic control mechanism;

[0025] The pressing block is arranged above the mounting block, and the rear side of the pressing block is designed to be inclined;

[0026] The driving frame is arranged below the lower pressing block to control the forward and backward movement of the lower pressing block, and a forward and backward sliding structure is formed between the driving frame and the base;

[0027] The automatic control mechanism is connected to the driving frame to control the movement of the driving frame.

[0028] To further optimize this technical solution, a connecting head is fixed above the driving frame, the connecting head passes through the lower pressing block and forms an up and down sliding structure, and a third spring is provided above the connecting head to provide downward thrust for the lower pressing block.

[0029] Further optimizing the technical solution, the automatic control mechanism includes a first gear, a mounting shaft, a second gear, a linkage plate and a transmission plate;

[0030] A first gear is disposed below the driving frame and is meshed with the driving frame;

[0031] An installation shaft is fixed to the middle of the first gear, and a rotation connection is formed between the installation shaft and the base;

[0032] The second gear is fixedly connected to the mounting shaft;

[0033] A linkage plate is arranged on the outer side of the second gear and is meshed with the second gear, and an up-and-down sliding structure is formed between the linkage plate and the base;

[0034] The transmission plate is fixed below the linkage plate, and the transmission plate is connected to the mounting seat.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] (1) The preheating bottom mold is heated by the heating plate so that it and the lower mold can achieve the preheating effect. When heat dissipation and cooling are required later, the heating plate is disconnected from the preheating bottom mold, thereby dissipating heat for the preheating bottom mold. The heat dissipation will not affect the heat on the heating plate, making it convenient for the heating plate to continue preheating the product, which is more energy-efficient. The lower mold can be moved on the preheating bottom mold to assist in demoulding the product.

[0037] (2) The vertical movement of the lower mold can drive the product to move on the preheated bottom mold, so that the bottom of the product can be separated from the connection with the preheated bottom mold, which assists in demoulding the product. Since the lower mold can drive the entire product to move, its lower surface can be separated from the adhesion with the preheated bottom mold, and the demoulding area is larger, which is less likely to cause damage to the product.

[0038] (3) The movement of the upper ejector block can squeeze the mounting block to control the vertical movement of the lower die, and when the upper ejector block is subsequently reset, the mounting block can automatically move downward under the action of the lower pull rod, driving the lower die to move downward, so that the lower die can be automatically reset.

[0039] (4) The lower pressure block can provide downward pressure for the mounting block, so that the lower die and the preheated bottom die maintain a stable connection and ensure the quality of die casting. Subsequently, the downward pressure effect of the lower pressure block on the mounting block can be released by controlling the translation of the lower pressure block, so that the upper block can drive the mounting block to move and assist in the demoulding work.

[0040] (5) The rotation of the first gear is controlled by the movement of the transmission plate and the engagement of the linkage plate and the second gear, thereby providing control for the drive frame so that the drive frame can automatically control the position of the lower pressing block after the heating plate moves. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0042] Figure 2 It is a rear view structural schematic diagram of the present invention.

[0043] Figure 3 It is a side structural schematic diagram of the present invention.

[0044] Figure 4 It is a schematic diagram of the three-dimensional structure of the lower mold of the present invention.

[0045] Figure 5 This is a schematic diagram of the three-dimensional structure of the preheating bottom mold of the present invention.

[0046] Figure 6 It is a schematic diagram of the three-dimensional structure of the base of the present invention.

[0047] Figure 7 This is a schematic diagram of the three-dimensional structure of the mounting block of the present invention.

[0048] Figure 8 This is a schematic diagram of the side sectional structure of the mounting block of the present invention.

[0049] Figure 9 It is a schematic diagram of the side structure of the lower pressing block of the present invention.

[0050] Figure 10 It is a schematic diagram of the main cross-sectional structure of the base of the present invention.

[0051] Figure 11 This is a schematic diagram of the connection structure between the drive frame and the first gear of the present invention.

[0052] In the figure: 1. Base; 2. Preheating bottom mold; 3. Lower mold; 4. Upper mold; 5. Guide rod; 6. Heat dissipation channel; 7. Heat conduction groove; 8. Heating plate; 9. Mounting seat; 10. Lifting controller; 11. Connecting block; 12. Mounting block; 13. Connecting groove; 14. Lower pull rod; 15. Clamping slot; 16. First spring; 17. Clamping block; 18. Second spring; 19. Movable plate; 20. Upper push block; 21. Control frame; 22. Lower pressure block; 23. Connecting head; 24. Third spring; 25. Drive frame; 26. First gear; 27. Mounting shaft; 28. Second gear; 29. ​​Linkage plate; 30. Transmission plate. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] Embodiment 1: The present invention provides the following technical solutions: a lightweight gearbox aluminum alloy housing die-casting mold, such as Figure 1-6 and Figure 10 As shown, it includes a base 1, a lower mold 3 and an upper mold 4, the lower mold 3 and the upper mold 4 are located above the base 1, and a preheating bottom mold 2 is arranged between the lower mold 3 and the base 1, and a guide rod 5 is fixed to the side of the preheating bottom mold 2, the guide rod 5 passes through the lower mold 3 and the upper mold 4, the preheating bottom mold 2 and the base 1 are fixedly connected, and a heat conduction groove 7 is arranged below the preheating bottom mold 2, and a heating plate 8 is attached to the inside of the heat conduction groove 7, and a mounting seat 9 is connected below the heating plate 8, and a lifting controller 10 is connected below the mounting seat 9, and the lifting controller 10 controls the vertical movement of the heating plate 8 so that the heating of the preheating bottom mold 2 can be disconnected and controlled, and a demoulding auxiliary mechanism is arranged on the outside of the lower mold 3, and the demoulding auxiliary mechanism is used to control the vertical sliding of the lower mold 3 along the guide rod 5, and a clamping mechanism is arranged on the outside of the lower mold 3, which presses the lower mold 3 against the surface of the preheating bottom mold 2 during die casting, and a heat dissipation channel 6 is arranged inside the preheating bottom mold 2 to assist in heat dissipation of the preheating bottom mold 2.

[0055] The lower die 3 and the upper die 4 can be disassembled and replaced from the guide rod 5, so as to perform die-casting processing of different shaped shells, such as Figure 4 and Figure 5 As shown, the lower mold 3 is movably installed above the preheating bottom mold 2. After the preheating bottom mold 2 is heated, it can transfer heat to the lower mold 3 to preheat it. The preheating bottom mold 2 is heated by the fit between the heat conduction groove 7 and the heating plate 8. When the mold needs to be cooled and dissipated after subsequent die-casting, the heating plate 8 can be controlled to move downward by the lifting controller 10. Figure 10 As shown, the contact between the heating plate 8 and the preheating bottom mold 2 is disconnected, and then the preheating bottom mold 2 can be cooled and dissipated. At this time, the temperature on the heating plate 8 will not dissipate, which makes it convenient for the subsequent heating plate 8 to continue heating the preheating bottom mold 2, which is more energy-efficient.

[0056] Example 2: Based on Example 1, Figure 4 and Figure 7-8As shown, it is further disclosed that the demoulding auxiliary mechanism includes a mounting block 12, an upper push mechanism and a pull-down reset mechanism. The mounting block 12 is arranged on the outer side of the lower mold 3, and the mounting block 12 is symmetrically distributed about the center of the lower mold 3. The upper push mechanism is arranged on the outer side of the mounting block 12 to provide upper push control for the mounting block 12. The pull-down reset mechanism is connected to the mounting block 12 to control the downward movement and reset of the mounting block 12. The upper push mechanism includes an upper push block 20 and a control frame 21. The upper push block 20 is arranged on the rear side of the mounting block 12, and the upper part of the upper push block 20 is designed with an inclined structure. The control frame 21 is fixedly connected to the upper push block 20, and a front-to-back sliding structure is formed between the control frame 21 and the base 1. The pull-down reset mechanism includes a lower pull rod 14, a card slot 15, a first spring 16, a card block 17, a second spring 18 and a movable plate 19. The lower pull rod 14 passes through the mounting block 12 and forms a nested connection between the mounting block 12, and the lower pull rod 1 The lower end of 4 is located inside the base 1 and between the base 1 to form an up and down sliding structure, the slot 15 is opened inside the lower pull rod 14, the first spring 16 is arranged at the lower end of the lower pull rod 14 to provide a downward thrust for the lower pull rod 14, the clamping block 17 is arranged inside the mounting block 12 and between the mounting block 12 to form a front and rear sliding structure, and a clamping structure is formed between the clamping block 17 and the slot 15, the second spring 18 is arranged on the outer side of the clamping block 17 to provide a backward thrust for the clamping block 17, the movable plate 19 is fixed to the rear end of the clamping block 17, and the rear side surface of the movable plate 19 is in contact with the upper block 20, a detachable connection is formed between the mounting block 12 and the lower mold 3, and the mounting block 12 is made of heat-insulating material, a connecting groove 13 is provided on the inner side of the mounting block 12, the front end of the connecting groove 13 is designed as an open structure, and the internal sliding connection of the connecting groove 13 is connected to the connecting block 11, and a fixed connection is formed between the connecting block 11 and the lower mold 3.

[0057] The mounting block 12 is arranged on the outer side of the lower die 3 to control the movement of the lower die 3. Figure 4 and Figure 7 As shown, the mounting block 12 can be installed on the outer side of the lower mold 3 through the connection between the connecting groove 13 and the connecting block 11. Subsequently, the lower pull rod 14 is passed through the mounting block 12 to realize the positioning of the mounting block 12. When it is necessary to control the movement of the lower mold 3 to assist in demoulding, the lower pull rod 14 is passed through the mounting block 12 to realize the positioning of the mounting block 12. Figure 8 As shown, the upper top block 20 can be controlled to move forward by moving the control frame 21. When the upper top block 20 moves, it first pushes the movable plate 19 and the card block 17 to move. The card block 17 is connected to the card slot 15. Then the upper top block 20 continues to move upward to squeeze the mounting block 12 to move. The mounting block 12 drives the lower mold 3 to move upward to assist in demoulding. At the same time, the lower mold 3 lifts the bottom of the product to facilitate heat dissipation of the bottom of the product. When the squeezing of the mounting block 12 by the upper top block 20 is subsequently released, the first spring 16 pushes the lower pull rod 14 downward to move. The lower pull rod 14 drives the mounting block 12 to move downward through the connection between the card block 17 and the card slot 15, so that the mounting block 12 can automatically move downward and reset.

[0058] Example 3: Based on Example 2, Figure 9-11 As shown, it is further disclosed that the clamping mechanism includes a lower pressing block 22, a driving frame 25 and an automatic control mechanism. The lower pressing block 22 is arranged above the mounting block 12, and the rear side of the lower pressing block 22 is designed with an inclined structure. The driving frame 25 is arranged below the lower pressing block 22 to control the forward and backward movement of the lower pressing block 22, and a forward and backward sliding structure is formed between the driving frame 25 and the base 1. The automatic control mechanism is connected to the driving frame 25 to control the movement of the driving frame 25. A connecting head 23 is fixed above the driving frame 25. The connecting head 23 passes through the lower pressing block 22 and forms an up and down sliding structure between the lower pressing block 22, and a third member is provided above the connecting head 23 to provide a downward thrust for the lower pressing block 22. Spring 24, the automatic control mechanism includes a first gear 26, a mounting shaft 27, a second gear 28, a linkage plate 29 and a transmission plate 30. The first gear 26 is arranged below the drive frame 25 and is meshed with the drive frame 25. The mounting shaft 27 is fixed in the middle of the first gear 26, and a rotational connection is formed between the mounting shaft 27 and the base 1. The second gear 28 is fixedly connected to the mounting shaft 27. The linkage plate 29 is arranged on the outer side of the second gear 28 and is meshed with the second gear 28. The linkage plate 29 and the base 1 form an up and down sliding structure. The transmission plate 30 is fixed below the linkage plate 29, and the transmission plate 30 is connected to the mounting base 9.

[0059] When the heating plate 8 and the preheating bottom mold 2 are fitted together, the lower pressing block 22 is located above the mounting block 12 to provide a stable downward pressure on the mounting block 12, so that the lower mold 3 and the preheating bottom mold 2 maintain a stable fit. At this time, the lower mold 3 cannot move vertically. When the heating plate 8 is subsequently controlled to move downward, combined with Figure 10 and Figure 11 As shown, the transmission plate 30 moves downward with the mounting seat 9, driving the linkage plate 29 to move. The linkage plate 29 drives the second gear 28 and the mounting shaft 27 to rotate by engaging with the second gear 28. The first gear 26 rotates accordingly and drives the driving frame 25 to move, so that the driving frame 25 drives the lower pressure block 22 to move, releasing the downward pressure effect of the lower pressure block 22 on the mounting block 12, and making the lower mold 3 movable.

[0060] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0061] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "dispose," "install," and other conjunctions should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0062] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lightweight gearbox aluminum alloy housing die-casting mold, comprising a base (1), a lower mold (3) and an upper mold (4), wherein the lower mold (3) and the upper mold (4) are located above the base (1); Its characteristics are: A preheating bottom mold (2) is provided between the lower mold (3) and the base (1), a guide rod (5) is fixed on the side of the preheating bottom mold (2), the guide rod (5) passes through the lower mold (3) and the upper mold (4), the preheating bottom mold (2) and the base (1) are fixedly connected, and a heat conduction groove (7) is provided below the preheating bottom mold (2), a heating plate (8) is attached to the inside of the heat conduction groove (7), a mounting seat (9) is connected below the heating plate (8), and the mounting seat ( 9) is connected to a lifting controller (10), which controls the vertical movement of the heating plate (8) so that the heating of the preheating bottom mold (2) can be disconnected. A demoulding auxiliary mechanism is provided on the outer side of the lower mold (3), which is used to control the vertical sliding of the lower mold (3) along the guide rod (5). A clamping mechanism is provided on the outside of the lower mold (3) to press the lower mold (3) against the surface of the preheating bottom mold (2) during die casting.

2. The lightweight gearbox aluminum alloy housing die-casting mold according to claim 1, characterized in that: A heat dissipation channel (6) is provided inside the preheating bottom mold (2) to assist in dissipating heat from the preheating bottom mold (2).

3. The lightweight gearbox aluminum alloy housing die-casting mold according to claim 1, characterized in that: The demoulding auxiliary mechanism comprises a mounting block (12), an upper push mechanism and a lower pull reset mechanism; A mounting block (12) is arranged on the outer side of the lower mold (3), and the mounting block (12) is symmetrically distributed about the center of the lower mold (3); An upper push mechanism is arranged on the outside of the mounting block (12) to provide upper push control for the mounting block (12); The pull-down reset mechanism is connected to the mounting block (12) to control the downward movement and reset of the mounting block (12).

4. The lightweight gearbox aluminum alloy housing die-casting mold according to claim 3, characterized in that: The lifting mechanism comprises a lifting block (20) and a control frame (21); An upper top block (20) is arranged on the rear side of the mounting block (12), and the upper portion of the upper top block (20) is designed to be inclined; The control frame (21) is fixedly connected to the upper top block (20), and a front-to-back sliding structure is formed between the control frame (21) and the base (1).

5. The lightweight gearbox aluminum alloy housing die-casting mold according to claim 4, characterized in that: The pull-down reset mechanism comprises a pull-down rod (14), a clamping slot (15), a first spring (16), a clamping block (17), a second spring (18) and a movable plate (19); The lower pull rod (14) passes through the mounting block (12) and forms a nested connection between the mounting blocks (12), and the lower end of the lower pull rod (14) is located inside the base (1) and between the base (1) to form an up and down sliding structure; A card slot (15) is provided inside the lower pull rod (14); A first spring (16) is provided at the lower end of the lower pull rod (14) to provide a downward thrust for the lower pull rod (14); A clamping block (17) is arranged inside the mounting block (12) and between the mounting block (12) to form a front-back sliding structure, and a clamping structure is formed between the clamping block (17) and the clamping slot (15); A second spring (18) is arranged on the outside of the clamping block (17) to provide a backward thrust for the clamping block (17); The movable plate (19) is fixed to the rear end of the clamping block (17), and the rear side surface of the movable plate (19) is in contact with the upper top block (20).

6. The lightweight gearbox aluminum alloy housing die-casting mold according to claim 5, characterized in that: The mounting block (12) and the lower mold (3) are detachably connected, and the mounting block (12) is made of a heat-insulating material.

7. The die-casting mold for a lightweight gearbox aluminum alloy housing according to claim 6, characterized in that: A connecting groove (13) is provided on the inner side of the mounting block (12), the front end of the connecting groove (13) is designed as an open structure, and the interior of the connecting groove (13) is slidably connected to a connecting block (11), and a fixed connection is formed between the connecting block (11) and the lower mold (3).

8. The lightweight gearbox aluminum alloy housing die-casting mold according to claim 1, characterized in that: The pressing mechanism comprises a lower pressing block (22), a driving frame (25) and an automatic control mechanism; The lower pressing block (22) is arranged above the mounting block (12), and the rear side of the lower pressing block (22) is designed to be inclined; A driving frame (25) is arranged below the lower pressing block (22) to control the forward and backward movement of the lower pressing block (22), and a forward and backward sliding structure is formed between the driving frame (25) and the base (1); The automatic control mechanism is connected to the driving frame (25) to control the movement of the driving frame (25).

9. The lightweight gearbox aluminum alloy housing die-casting mold according to claim 8, characterized in that: A connecting head (23) is fixed above the driving frame (25), and the connecting head (23) passes through the lower pressing block (22) and forms an up and down sliding structure between the lower pressing block (22), and a third spring (24) is provided above the connecting head (23) to provide a downward thrust for the lower pressing block (22).

10. A lightweight gearbox aluminum alloy housing die-casting mold according to claim 8 or 9, characterized in that: The automatic control mechanism comprises a first gear (26), a mounting shaft (27), a second gear (28), a linkage plate (29) and a transmission plate (30); A first gear (26) is disposed below the driving frame (25) and is meshedly connected with the driving frame (25); A mounting shaft (27) is fixed to the middle of the first gear (26), and a rotation connection is formed between the mounting shaft (27) and the base (1); A second gear (28) is fixedly connected to the mounting shaft (27); A linkage plate (29) is arranged on the outer side of the second gear (28) and is meshed with the second gear (28), and an up-and-down sliding structure is formed between the linkage plate (29) and the base (1); The transmission plate (30) is fixed below the linkage plate (29), and the transmission plate (30) is connected to the mounting seat (9).

Images