A die-casting mould for an automobile gear box housing

Abstract

This utility model relates to the field of die-casting mold technology, specifically a die-casting mold for automotive gearbox housings. It includes a die-casting mold body, with a lower mold fixedly mounted on one side inside the die-casting mold body. A double-ended lead screw is rotatably connected inside the die-casting mold body, and two symmetrically distributed horizontal plates are threaded onto the outer surface of the double-ended lead screw. Circulating heat dissipation pipes for cooling the lower mold are fixedly installed inside each of the two horizontal plates. This utility model allows the circulating heat dissipation pipes at the two horizontal plates to fit against both ends of the lower mold, and utilizes the two circulating heat dissipation pipes capable of circulating water to reduce heat loss from the lower mold. This quickly dissipates the heat generated during the lower mold's operation, accelerating the cooling and shaping of the automotive gearbox housing. Furthermore, the combination of two sets of heat sinks and heat dissipation holes further improves the heat dissipation effect and production efficiency of the die-casting mold.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, specifically a die-casting mold for automotive gearbox housings. Background Technology

[0002] Die casting molds are tools used to produce metal parts. They are mainly used for forming liquid metal materials during the die casting process. The mold workpiece is usually processed by a mold machine. Molds can be designed and manufactured according to the required workpiece shape and size. For example, die casting molds are needed to produce automotive gearbox housings.

[0003] The prior art discloses patent application number "CN202120584815.4", which discloses a gearbox housing die-casting mold, including a lower template. The top of the lower template is fixedly connected to a lower mold base. The top of the lower mold base has a groove. The bottom of the inner wall of the groove is provided with a demolding mechanism. The demolding mechanism includes a base fixed to the bottom of the inner wall of the groove. A first sliding groove is provided on the left side in front of the base. A slider is slidably connected to the inner surface of the first sliding groove. A threaded rod is rotatably connected to the right side of the base. A moving block is threadedly connected to the outer surface of the threaded rod. A sliding plate is slidably connected between the left and right sides of the inner wall of the groove.

[0004] This die-casting mold can only prevent the gearbox housing from getting stuck in the groove when it is demolded. However, in actual use, the temperature of the die-casting mold is high after the die-casting operation is completed. At this time, it takes time to wait for the car gearbox housing to cool and solidify. The heat cannot be dissipated quickly, resulting in poor heat dissipation of the die-casting mold, which in turn affects the production efficiency of the die-casting mold. Utility Model Content

[0005] The purpose of this invention is to provide a die-casting mold for automotive gearbox housings to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A die-casting mold for an automotive gearbox housing includes a die-casting mold body, a lower mold fixedly provided on one side inside the die-casting mold body, a double-ended lead screw rotatably connected inside the die-casting mold body, two symmetrically distributed horizontal plates threaded on the outer surface of the double-ended lead screw, and circulating heat dissipation bends for cooling the lower mold fixedly installed inside the two horizontal plates, and a water pump and a water tank fixedly provided at the bottom inside the die-casting mold body respectively.

[0008] One side of the two circulating heat dissipation bends is fixedly connected to one side of the water pump with an upper water hose, and one side of the two circulating heat dissipation bends is fixedly connected to the upper side of the water tank with a lower water hose. One end of the water tank is fixedly connected to one end of the water pump with a water supply pipe. An array of heat dissipation holes is opened on one side inside the die-casting mold body. Two grooves are opened on one side inside the die-casting mold body, and heat dissipation fins are arrayed inside both grooves.

[0009] Preferably, an array of positioning plates are snapped into one side of the die-casting mold body. The positioning plates are used to fix the lower mold. A fastening bolt is threaded into one side of the positioning plate. One side of the fastening bolt passes through the positioning plate and extends into the interior of the lower mold. Fixing blocks are fixed at both ends of the lower mold. A slot is opened on one side of each of the two horizontal plates. One side of the fixing block is snapped into the slot. A top plate is fixedly connected to the upper side of the die-casting mold body.

[0010] Preferably, an ejector slide for demolding is slidably installed at the bottom of the lower mold. One side of the ejector slide passes through the lower mold and extends to the lower side of the lower mold. A first rubber seat is fixedly provided on one side of the ejector slide, and a connecting spring is fixedly connected between the first rubber seat and the lower mold.

[0011] Preferably, an L-shaped support plate is fixedly connected to the bottom of the die-casting mold body, an electric push rod is fixedly connected to one side of the L-shaped support plate, and a second rubber seat is fixedly provided on one side of the electric push rod, with the second rubber seat located below the first rubber seat.

[0012] Preferably, a hydraulic cylinder is fixedly connected to one side of the top plate, and an upper mold is fixedly installed on one side of the hydraulic cylinder, with the upper mold located above the lower mold.

[0013] Preferably, two grooves are formed on one side of the die-casting mold body, and the water inlet hose and water outlet hose are located in the grooves. A servo motor is fixedly connected to one end of the die-casting mold body, and the output shaft of the servo motor is fastened to a double-ended lead screw. A limit rod is fixedly installed inside the die-casting mold body, and the outer surface of the limit rod is slidably connected to the inside of the horizontal plate.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model allows the circulating heat dissipation bends at the two horizontal plates to fit into both ends of the lower mold. The two circulating heat dissipation bends that can circulate water can then be used to dissipate heat from the lower mold, thereby quickly dissipating the heat generated during the operation of the lower mold and accelerating the cooling and shaping of the automotive gearbox housing. In addition, with the addition of two sets of heat dissipation fins and heat dissipation holes, the heat dissipation effect and production efficiency of the die-casting mold can be further improved.

[0016] 2. This utility model utilizes four positioning plates and slots at the two horizontal plates to lock onto two fixed blocks, thereby synchronously locking the lower mold around its perimeter, improving the stability of the lower mold during locking, preventing it from shaking, and ensuring the stable and safe operation of the die-casting process. Subsequently, the elastic ejector slide can eject the lower mold elastically, without directly and rigidly ejecting the automotive gearbox housing, thus improving the demolding quality of the automotive gearbox housing during die-casting. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a utility model Figure 1 Schematic diagram of the central circulation cooling elbow, water inlet hose and water outlet hose;

[0020] Figure 3 This is a utility model Figure 1 Installation diagram of the middle hydraulic cylinder and the lower mold;

[0021] Figure 4 This is a utility model Figure 3 A schematic diagram of the structure of the ejector slide, the first rubber seat, and the connecting spring;

[0022] The attached figures are labeled as follows:

[0023] 1. Die-casting mold body; 2. Lower mold; 3. Top plate; 4. Hydraulic cylinder; 5. Upper mold; 6. Positioning insert plate; 7. Fastening bolt; 8. Double-ended lead screw; 9. Horizontal plate; 10. Fixing block; 11. Slot; 12. Circulating heat dissipation bend; 13. Water pump; 14. Water inlet hose; 15. Water tank; 16. Water delivery pipe; 17. Water outlet hose; 18. Heat dissipation hole; 19. Groove one; 20. Heat dissipation fin; 21. Groove two; 22. Limiting rod; 23. Ejector slide; 24. First rubber seat; 25. L-shaped support plate; 26. Electric push rod; 27. Second rubber seat; 28. Connecting spring. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1 to 4 As shown, a die-casting mold for an automotive gearbox housing includes a die-casting mold body 1. A lower mold 2 is fixedly provided on one side inside the die-casting mold body 1. A double-ended lead screw 8 is rotatably connected inside the die-casting mold body 1. Two symmetrically distributed horizontal plates 9 are threadedly connected to the outer surface of the double-ended lead screw 8. A circulating heat dissipation bend 12 for cooling the lower mold 2 is fixedly installed inside the two horizontal plates 9. A water pump 13 and a water tank 15 are fixedly provided at the bottom inside the die-casting mold body 1.

[0026] One side of each of the two circulating heat dissipation bends 12 is fixedly connected to one side of the water pump 13 with an upper water hose 14. One side of each of the two circulating heat dissipation bends 12 is fixedly connected to the upper side of the water tank 15 with a lower water hose 17. One end of the water tank 15 is fixedly connected to one end of the water pump 13 with a water supply pipe 16. One side of the die-casting mold body 1 has an array of heat dissipation holes 18. One side of the die-casting mold body 1 has two grooves 19. The interior of each groove 19 is connected in an array with heat dissipation fins 20. The two sets of heat dissipation fins 20 can be attached to the lower part of the lower mold 2 to accelerate the heat dissipation effect of the lower mold 2.

[0027] One side of the die-casting mold body 1 is fitted with an array of positioning plates 6. The positioning plates 6 are used to fix the lower mold 2. One side of the positioning plates 6 is threaded with a fastening bolt 7. One side of the fastening bolt 7 passes through the positioning plates 6 and extends into the interior of the lower mold 2. Both ends of the lower mold 2 are fixed with fixing blocks 10. One side of each of the two horizontal plates 9 is provided with a slot 11. One side of the fixing block 10 is fitted into the slot 11. The upper side of the die-casting mold body 1 is fixedly connected with a top plate 3.

[0028] An ejector slide 23 for demolding is slidably installed at the bottom of the lower mold 2. One side of the ejector slide 23 passes through the lower mold 2 and extends to the lower side of the lower mold 2. A first rubber seat 24 is fixedly provided on one side of the ejector slide 23. A connecting spring 28 is fixedly connected between the first rubber seat 24 and the lower mold 2.

[0029] An L-shaped support plate 25 is fixedly connected to the bottom of the die-casting mold body 1. An electric push rod 26 is fixedly connected to one side of the L-shaped support plate 25. The electric push rod 26 is model HB-DJ801. A second rubber seat 27 is fixedly provided on one side of the electric push rod 26. The second rubber seat 27 is located below the first rubber seat 24. The first rubber seat 24 and the second rubber seat 27 can play an elastic buffering role, allowing the ejector slide 23 to elastically eject the car gearbox housing, which has good safety.

[0030] A hydraulic cylinder 4 is fixedly connected to one side of the top plate 3. An upper mold 5 is fixedly installed on one side of the hydraulic cylinder 4. The upper mold 5 is located above the lower mold 2. The hydraulic cylinder 4 is activated, which drives the upper mold 5 to move downward and fall to fit above the lower mold 2. Then, the molten metal is injected into the die-casting mold, and then cooled and shaped to process the car gearbox housing.

[0031] Two grooves 21 are opened on one side inside the die-casting mold body 1. The water inlet hose 14 and the water outlet hose 17 are located in the grooves 21. A servo motor is fixedly connected to one end of the die-casting mold body 1. The output shaft of the servo motor is fastened to the double-ended lead screw 8. The servo motor is model SMBL-60P. A limit rod 22 is fixedly installed inside the die-casting mold body 1. The outer surface of the limit rod 22 is slidably connected to the inside of the horizontal plate 9. The limit rod 22 can guide and limit the movement trajectory of the two horizontal plates 9, so that the two horizontal plates 9 can move and adjust smoothly for clamping and positioning the lower mold 2.

[0032] The working principle of the die-casting mold for automotive gearbox housing provided by this utility model is as follows:

[0033] By starting the servo motor, the output shaft of the servo motor drives the double-ended lead screw 8 to rotate. At this time, the two horizontal plates 9 on the double-ended lead screw 8 can move towards each other, so that the circulating heat dissipation bends 12 at the two horizontal plates 9 can fit against the two ends of the lower mold 2. Then, the water pump 13 is started. The water pump 13 can transport the cold water in the water tank 15 along the water supply pipe 16 and the water supply hose 14 to the two circulating heat dissipation bends 12. In this way, the two circulating heat dissipation bends 12 can dissipate heat from the lower mold 2, so as to quickly dissipate the heat generated by the lower mold 2 during operation and accelerate the cooling and shaping of the car gearbox housing. At the same time, the water in the two circulating heat dissipation bends 12 will also flow down and enter the water tank 15 from the water supply hose 17 to re-cool the heated cold water, thereby realizing the circulation of cold water to reduce the temperature of the lower mold 2. With the help of two sets of heat sinks 20 and heat dissipation holes 18, the heat dissipation effect and production efficiency of the die casting mold can be further improved.

[0034] By inserting four positioning plates 6 into one side of the die-casting mold body 1, and then tightening four fastening bolts 7 in sequence, the positioning plates 6 are fixed by the fastening bolts 7. As the two horizontal plates 9 move towards each other, the slots 11 at the two horizontal plates 9 can be engaged with the two fixing blocks 10, so as to lock the lower mold 2 around the perimeter synchronously, improve the stability of the lower mold 2 when engaged, prevent it from shaking, and ensure that the die-casting work is stable and safe. Then, after the car gearbox housing is die-cast, the electric push rod 26 can drive the second rubber seat 27 to move upward and squeeze the first rubber seat 24, so that the ejector slide 23 with the connecting spring 28 can eject the car gearbox housing and realize the demolding work. At this time, the elastic ejector slide 23 can eject elastically, instead of directly and rigidly ejecting the car gearbox housing, thus improving the demolding quality of the car gearbox housing during die casting.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A die-casting mold for an automotive transmission housing, comprising a die-casting mold body (1), characterized in that: A lower mold (2) is fixedly provided on one side inside the die casting mold body (1). A double-ended lead screw (8) is rotatably connected inside the die casting mold body (1). Two symmetrically distributed horizontal plates (9) are threaded on the outer surface of the double-ended lead screw (8). A circulating heat dissipation bend (12) for cooling the lower mold (2) is fixedly installed inside the two horizontal plates (9). A water pump (13) and a water tank (15) are fixedly provided at the bottom inside the die casting mold body (1). One side of each of the two circulating heat dissipation bends (12) is fixedly connected to one side of the water pump (13) with a water inlet hose (14), and one side of each of the two circulating heat dissipation bends (12) is fixedly connected to the upper side of the water tank (15) with a water outlet hose (17). One end of the water tank (15) is fixedly connected to one end of the water pump (13) with a water delivery pipe (16). One side of the die-casting mold body (1) has an array of heat dissipation holes (18), and one side of the die-casting mold body (1) has two grooves (19). The interior of the two grooves (19) is connected in an array with heat dissipation fins (20).

2. A die casting mold for an automobile transmission case housing according to claim 1, wherein One side of the die-casting mold body (1) is fitted with an array of positioning plates (6), which are used to fix the lower mold (2). One side of the positioning plate (6) is threaded with a fastening bolt (7), and one side of the fastening bolt (7) passes through the positioning plate (6) and extends into the interior of the lower mold (2). Both ends of the lower mold (2) are fixed with fixing blocks (10). One side of each of the two horizontal plates (9) is provided with a slot (11). One side of the fixing block (10) is fitted into the slot (11). The upper side of the die-casting mold body (1) is fixedly connected with a top plate (3).

3. A die casting mold for an automobile transmission case housing according to claim 1, wherein An ejector slide (23) for demolding is slidably installed at the bottom of the lower mold (2). One side of the ejector slide (23) passes through the lower mold (2) and extends to the lower side of the lower mold (2). A first rubber seat (24) is fixedly provided on one side of the ejector slide (23). A connecting spring (28) is fixedly connected between the first rubber seat (24) and the lower mold (2).

4. A die casting mold for an automobile transmission case housing according to claim 3, wherein An L-shaped support plate (25) is fixedly connected to the bottom of the die-casting mold body (1). An electric push rod (26) is fixedly connected to one side of the L-shaped support plate (25). A second rubber seat (27) is fixedly provided on one side of the electric push rod (26). The second rubber seat (27) is located below the first rubber seat (24).

5. A die casting mold for an automobile transmission case housing according to claim 2, wherein A hydraulic cylinder (4) is fixedly connected to one side of the top plate (3), and an upper mold (5) is fixedly installed on one side of the hydraulic cylinder (4). The upper mold (5) is located above the lower mold (2).

6. A die casting mold for an automobile transmission case housing according to claim 1, wherein Two grooves (21) are opened on one side inside the die casting mold body (1). The water inlet hose (14) and the water outlet hose (17) are located in the grooves (21). A servo motor is fixedly connected to one end of the die casting mold body (1). The output shaft of the servo motor is fastened to the double-ended lead screw (8). A limit rod (22) is fixedly installed inside the die casting mold body (1). The outer surface of the limit rod (22) is slidably connected to the inside of the horizontal plate (9).

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