A die-casting mold for easy demolding of a transmission housing

Abstract

This invention discloses a convenient demolding die-casting mold for a transmission housing, relating to the field of die-casting mold technology. It includes a lower mold base and an upper mold base. Four drive rods are fixed to the bottom of the upper mold base. A moving groove is formed on the surface of the lower mold base. A first sliding seat is slidably installed inside the lower mold base. A striking component is provided on the side wall of the first sliding seat. A vibration frame is provided inside the lower mold base. Multiple vibration blocks are symmetrically arranged on the side wall of the vibration frame. A rotating shaft is provided on the side wall of the vibration frame, and a vibration component is provided on the side wall of the rotating shaft. This invention, through the vibration frame, vibration blocks, and vibration component, creates uniform vibration of the molten fluid inside the mold during die-casting, increasing the flow rate of the molten metal to the far ends of the housing, promoting uniform filling of the complex cavity with solute, resulting in a mold with better appearance and service life, and improving production qualification rate and product consistency.

Description

Technical Field

[0001] This invention relates to the field of die-casting mold technology, specifically to a die-casting mold for a transmission housing that facilitates demolding. Background Technology

[0002] The transmission housing is a core load-bearing component of the automotive transmission system, requiring high strength, high precision, and lightweight design. With the widespread use of aluminum alloys in the automotive industry, high-pressure die casting has gradually become the mainstream solution for housing manufacturing because it can achieve one-time molding of complex structures without the need for multiple subsequent machining processes. This results in higher material utilization than traditional sand casting, reducing raw material waste. The working principle of transmission housing die casting molds is based on high-pressure die casting technology. The core is to rapidly press molten aluminum alloy into the mold cavity under high pressure, and use the forced cooling of the mold to achieve rapid solidification of the molten metal. The application of this type of mold shortens the production cycle of transmission housings and meets the automotive industry's dual requirements for component precision and mass production.

[0003] In existing technologies for die casting of transmission housings, the design of the casting system and the solute flow characteristics directly affect the product molding quality. Molten aluminum alloy is injected into the mold cavity through the casting port and gradually fills the area away from the casting port along the cavity channel to completely cover the complex structure of the housing. However, during this process, the kinetic energy of the solute will continuously decrease, especially in the areas extending to both sides of the housing. Since these areas are farthest from the casting port, the flow rate of the solute decreases when it arrives, which can easily lead to insufficient filling or solute accumulation in some areas. This results in uneven filling and potential quality problems. At the same time, the complex structure of the housing may cause stress imbalance during demolding, increasing the difficulty of demolding and affecting the product qualification rate.

[0004] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide a convenient die-casting mold for transmission housings, which solves the problems of insufficient local filling or solute accumulation and difficulty in demolding mentioned in the background art. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a die-casting mold for a transmission housing that facilitates demolding, comprising a lower mold frame and an upper mold frame, wherein four drive rods are fixed at the bottom of the upper mold frame, a moving groove is provided on the surface of the lower mold frame, a first sliding seat is slidably installed inside the lower mold frame, a striking component is provided on the side wall of the first sliding seat, a vibration frame is provided inside the lower mold frame, a plurality of vibration blocks are symmetrically arranged on the side wall of the vibration frame, a rotating shaft is provided on the side wall of the vibration frame, and a vibration component is provided on the side wall of the rotating shaft;

[0007] The striking assembly includes a second sliding seat fixed to the side wall of the first sliding seat, the side wall of the first sliding seat having a first driving groove, the side wall of the second sliding seat having a second driving groove, and a fixed seat fixed inside the lower mold frame. A striking rod is rotatably mounted on the top of the fixed seat, and a connecting block is mounted on the lower end of the striking rod.

[0008] Preferably, the position of the drive rod corresponds to the position of the moving slot, and the position of the first drive slot corresponds to the position of the moving slot.

[0009] Preferably, a driving block is fixed to the end of the driving rod, the position of the driving block corresponds to the first driving groove, the first driving groove is inclined, and a one-way block is elastically slidably arranged in the first driving groove.

[0010] Preferably, the first sliding seat is provided with a tension spring on its side wall, and the first sliding seat is connected to the fixed seat through the tension spring.

[0011] Preferably, a return spring is provided on the surface of the fixed base, and the upper end of the striking rod is connected to the fixed base through the return spring.

[0012] Preferably, the second drive slot is triangular in design, and the connecting block is located inside the second drive slot.

[0013] Preferably, the vibration assembly includes a rotating seat disposed on the side wall of a rotating shaft, a transmission block rotatably mounted on the side wall of the rotating seat, and a drive shaft rotatably mounted inside the lower mold frame. A guide block is fixed to the end of the drive shaft, a limit block is disposed inside the guide block, an adjustment block is rotatably mounted on the side wall of the guide block, and an adjustment seat is slidably mounted on the side wall of the drive shaft.

[0014] Preferably, the guide block has an arc design, a guide groove is provided inside the guide block, the limiting block is located in the guide groove, and the limiting block is connected to the transmission block.

[0015] Preferably, the adjusting block is designed in an L-shape, and an adjusting seat and a transmission block are slidably connected to both ends of the adjusting block, respectively.

[0016] Preferably, a drive motor is connected to the end of the drive shaft, and an electric push rod is connected to the side wall of the adjustment seat.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention, through the design of a vibration frame, vibration blocks, and vibration components, enables the vibration components to drive the vibration frame and vibration blocks to reciprocate at high frequency during die casting. This precisely transmits the impact force to the mold body installed on the lower mold frame, creating uniform vibration of the molten fluid inside the mold body. The vibration of the molten fluid inside the mold body increases the flow rate of the molten metal to the far ends of both sides of the shell, promoting uniform filling of the solute throughout the complex cavity. This avoids defects such as local material shortages and shrinkage, resulting in molds with better appearance and service life, and improving production qualification rate and product consistency.

[0019] This invention, through the configuration of a drive rod, a moving groove, a first sliding seat, and a striking component, allows the upper mold frame to move upward while the drive rod triggers the striking component. The striking rod then delivers a powerful blow to the bottom of the mold body, quickly breaking the adhesion between the casting and the mold cavity. This reduces the difficulty of demolding, facilitates the demolding of the formed shell, shortens demolding time, improves production efficiency, ensures the appearance integrity and structural precision of the formed shell, and enhances product qualification rate and production stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the disassembled structure of the lower mold frame and the upper mold frame of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the lower mold frame and the upper mold frame of the present invention;

[0022] Figure 3 This is a cross-sectional view of the lower mold frame of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the first sliding seat of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the second sliding seat of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the vibration block of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the vibration component of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the vibration component from another perspective of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the adjusting block of the present invention.

[0029] In the diagram: 1. Lower mold frame; 101. Upper mold frame; 102. Drive rod; 103. Moving groove; 2. Vibration frame; 201. Vibration block; 3. Rotating shaft; 301. Rotating seat; 302. Transmission block; 4. Drive shaft; 401. Guide block; 402. Limiting block; 403. Adjusting block; 5. Adjusting seat; 6. First sliding seat; 601. First driving groove; 7. Second sliding seat; 701. Second driving groove; 8. Fixed seat; 801. Striking rod; 802. Connecting block. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-9 This invention provides a technical solution: a convenient demolding die-casting mold for a transmission housing, comprising a lower mold frame 1 and an upper mold frame 101. Four drive rods 102 are fixed at the bottom of the upper mold frame 101, and the four drive rods 102 are symmetrically distributed. A moving groove 103 is provided on the surface of the lower mold frame 1, which provides a stable guiding path for the drive rods 102. A first sliding seat 6 is slidably installed inside the lower mold frame 1, and a striking component is provided on the side wall of the first sliding seat 6. A vibration frame 2 is provided inside the lower mold frame 1, and multiple vibration blocks 201 are symmetrically arranged on the side wall of the vibration frame 2. The multiple vibration blocks 201 can achieve uniform vibration of the mold body throughout the entire area, avoiding fluid accumulation caused by insufficient local vibration. A rotating shaft 3 is provided on the side wall of the vibration frame 2, and a vibration component is provided on the side wall of the rotating shaft 3.

[0032] The striking assembly includes a second sliding seat 7 fixed to the side wall of the first sliding seat 6. The second sliding seat 7 moves synchronously with the first sliding seat 6 to ensure the continuity of power transmission. The side wall of the first sliding seat 6 is provided with a first driving groove 601, and the side wall of the second sliding seat 7 is provided with a second driving groove 701. It also includes a fixed seat 8 fixed inside the lower mold frame 1. A striking rod 801 is rotatably mounted on the top of the fixed seat 8, and a connecting block 802 is installed at the lower end of the striking rod 801.

[0033] In one embodiment of the present invention, the position of the drive rod 102 corresponds to the position of the moving groove 103. When the upper mold frame 101 is raised or lowered, the drive rod 102 can slide into the moving groove 103 without deviation. The position of the first drive groove 601 corresponds to the position of the moving groove 103.

[0034] In one embodiment of the present invention, a driving block is fixed at the end of the driving rod 102. The position of the driving block corresponds to the first driving groove 601. When the upper mold frame 101 is raised or lowered, the driving block at the end of the driving rod 102 can be precisely embedded in the first driving groove 601, ensuring the synchronicity and consistency of the subsequent striking component actions, so that the power of the upper mold frame 101 being raised can be completely transmitted to the first sliding seat 6. The first driving groove 601 is designed with an inclination. A one-way block is elastically slidably arranged in the first driving groove 601. When the upper mold frame 101 is raised, the driving block presses the one-way block upward, and the driving block moves along the inclination of the inner wall of the first driving groove 601, driving the first sliding seat 6 to slide synchronously. When the lower mold frame 1 is lowered and the mold is closed, the driving block moves downward, and the one-way block retracts into the interior of the first driving groove 601, without affecting the descent of the driving rod 102.

[0035] In one embodiment of the present invention, a tension spring is provided on the side wall of the first sliding seat 6. The first sliding seat 6 is connected to the fixed seat 8 through the tension spring. The tension spring can realize the automatic reset of the first sliding seat 6. When the demolding stage, the driving block drives the first sliding seat 6 to slide against the tension of the tension spring. After the knocking component triggering action is completed, the driving block continues to rise with the upper mold frame 101 and disengages from the first driving groove 601. The tension spring pulls the first sliding seat 6 to quickly return to the initial position, preparing for the next die casting demolding cycle.

[0036] In one embodiment of the present invention, a return spring is provided on the surface of the fixed seat 8. The upper end of the striking rod 801 is connected to the fixed seat 8 through the return spring. When the second sliding seat 7 moves with the first sliding seat 6, the second driving groove 701 on its side wall drives the connecting block 802 to move, forcing the striking rod 801 to rotate around the fulcrum at the top of the fixed seat 8. At this time, the upper end of the striking rod 801 squeezes the return spring, causing the spring to compress and store sufficient elastic potential energy. When the connecting block 802 moves to the top of the vertical section of the second driving groove 701, the return spring releases its potential energy instantly, causing the striking rod 801 to swing down and reset quickly, applying a concentrated and powerful strike to the bottom of the lower mold body.

[0037] In one embodiment of the present invention, the second drive groove 701 is triangular in design, and the connecting block 802 is located inside the second drive groove 701. The three sides of the triangular second drive groove 701 can correspond to the three action stages of the connecting block 802: power storage, triggering and resetting, to ensure that the striking component is synchronized with the demolding process.

[0038] In one embodiment of the present invention, the vibration assembly includes a rotating seat 301 disposed on the side wall of the rotating shaft 3, a transmission block 302 rotatably mounted on the side wall of the rotating seat 301, and an active shaft 4 rotatably mounted inside the lower mold frame 1. A guide block 401 is fixed at the end of the active shaft 4, a limit block 402 is disposed inside the guide block 401, an adjustment block 403 is rotatably mounted on the side wall of the guide block 401, and an adjustment seat 5 is slidably mounted on the side wall of the active shaft 4.

[0039] As one embodiment of the present invention, the guide block 401 is designed with an arc, and a guide groove is provided inside the guide block 401. The limiting block 402 is located in the guide groove and is connected to the transmission block 302. When the adjusting block 403 drives the limiting block 402 to change its position in the guide groove, the connection between the limiting block 402 and the transmission block 302 can ensure that the position adjustment is synchronously transmitted to the transmission block 302, thereby accurately changing the swing amplitude of the rotating shaft 3.

[0040] As one embodiment of the present invention, the adjusting block 403 is designed in an L-shape. The adjusting seat 5 and the transmission block 302 are slidably connected at both ends of the adjusting block 403. The corner structure of the L-shaped adjusting block 403 can connect the linear movement of the adjusting seat 5 with the swinging movement of the transmission block 302 to form a continuous power transmission chain.

[0041] In one embodiment of the present invention, a drive motor is connected to the end of the drive shaft 4, and an electric push rod is connected to the side wall of the adjustment seat 5. The drive motor provides a stable and reliable power source support for the vibration assembly. The electric push rod can drive the adjustment seat 5 to slide smoothly along the side wall of the drive shaft 4, thereby changing the relative position of the limit block 402 and the transmission block 302 through the L-shaped adjustment block 403, so as to realize the adjustment of the swing angle of the rotating shaft 3 and adapt to different specifications of molds.

[0042] Working Principle: When using this easy-to-demold transmission housing die-casting mold, the upper and lower mold bodies are first installed inside the lower mold frame 1 and the upper mold frame 101, respectively. The extension length of the electric push rod is adjusted according to the cavity structure and size specifications of the mold body to ensure the compatibility of the subsequent vibration components with the mold body. Then, the equipment is started, and the die-casting system drives the lower mold frame 1 to descend smoothly and achieve precise cavity closure with the upper mold frame 101, forming a sealed die-casting space. After the molten aluminum alloy is injected into the cavity through the casting system, the drive motor is started, driving the drive shaft 4 to begin rotating at a uniform speed. The drive shaft 4 continues to rotate, stably transmitting power to the guide block 401. Because the limiting block 402 inside the guide block 401 is connected to the transmission block 302, the transmission block 302 is driven, pulling the rotating shaft 3 around the fixed fulcrum in a regular back-and-forth motion via the rotating seat 301. The extension end of the electric push rod... Connected to the adjusting seat 5, the adjusting seat 5 is pushed by the electric push rod to slide on the side wall of the drive shaft 4, synchronously driving the adjusting block 403 to rotate around the fixed fulcrum of the side wall of the guide block 401. By changing the position of the limit block 402 and the transmission block 302 in the guide block 401, the swing amplitude and frequency of the rotating shaft 3 are adjusted to adapt to the upper and lower molds of different specifications, avoid insufficient or excessive vibration intensity due to differences in molds, and always maintain a stable vibration assistance effect. While the rotating shaft 3 swings, the vibration frame 2 set on its side wall moves synchronously. The vibration block 201 on the side wall of the vibration frame 2 continuously vibrates the lower mold uniformly, breaking the static balance of the molten aluminum alloy fluid inside the mold, promoting the orderly flow of the fluid, offsetting its kinetic energy attenuation in the area far from the casting gate, improving the production qualification rate and product consistency, and laying a good foundation for subsequent demolding and product quality.

[0043] When the lower mold frame 1 descends and closes with the upper mold frame 101, the drive rod 102 simultaneously enters the preset moving groove 103 of the lower mold frame 1. The drive block fixed at the end of the drive rod 102 precisely enters the first drive groove 601 of the first sliding seat 6. After the molten aluminum alloy in the mold cavity has completely cooled and solidified, the die-casting equipment drives the upper mold frame 101 to rise, separating it from the lower mold frame 1. Since a one-way block is elastically slidably installed in the first drive groove 601, the drive block will squeeze the inclined side wall of the moving groove 103 as it moves upward with the drive rod 102. Under the guiding action of the inclination, the first sliding seat 6 is driven to slide against the tension of the tension spring. While the first sliding seat 6 moves, its side wall The fixed second sliding seat 7 moves along with it. Since the connecting block 802 is located in the second drive groove 701, as the second sliding seat 7 moves, the connecting block 802 first moves along the inclined section of the second drive groove 701, forcing the striking rod 801 to squeeze the reset spring and rotate around the fixed fulcrum. When the connecting block 802 moves to the top of the vertical section of the second drive groove 701, the reset spring quickly releases its elastic potential energy, causing the striking rod 801 to quickly reset and apply a concentrated and powerful strike to the bottom of the lower mold body. This quickly breaks the adhesion between the casting and the mold cavity, reduces the difficulty of demolding, shortens the demolding cycle, improves overall production efficiency, and provides a stable guarantee for the mass and high-quality production of the gearbox housing.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A die casting mold for a transmission case which is easily demolded, comprising a lower mold frame (1) and an upper mold frame (101), characterized in that: The upper die frame (101) is fixed with four driving rods (102), the surface of the lower die frame (1) is provided with a moving groove (103), the inside of the lower die frame (1) is slidably provided with a first sliding seat (6), the side wall of the first sliding seat (6) is provided with a knocking assembly, the inside of the lower die frame (1) is provided with a vibrating frame (2), the side wall of the vibrating frame (2) is symmetrically provided with a plurality of vibrating blocks (201), the side wall of the vibrating frame (2) is provided with a rotating shaft (3), and the side wall of the rotating shaft (3) is provided with a vibrating assembly. The knocking assembly comprises a second sliding seat (7) fixed to the side wall of the first sliding seat (6), a first driving groove (601) is formed in the side wall of the first sliding seat (6), a second driving groove (701) is formed in the side wall of the second sliding seat (7), and a fixed seat (8) is fixed to the inside of the lower die frame (1). The top of the fixed seat (8) is rotatably provided with a knocking rod (801), and the lower end of the knocking rod (801) is provided with a connecting block (802). The vibrating assembly comprises a rotating seat (301) provided on the side wall of the rotating shaft (3), and the side wall of the rotating seat (301) is rotatably provided with a transmission block (302). The inside of the lower die frame (1) is rotatably provided with a driving shaft (4), the end of the driving shaft (4) is fixedly provided with a guide block (401), the inside of the guide block (401) is provided with a limiting block (402), the side wall of the guide block (401) is rotatably provided with an adjusting block (403), and the side wall of the driving shaft (4) is slidably provided with an adjusting seat (5). The guide block (401) is designed in a circular arc, the inside of the guide block (401) is provided with a guide groove, the limiting block (402) is located in the guide groove, and the limiting block (402) is connected with the transmission block (302). The adjusting block (403) is designed in an L shape, and the adjusting block (403) is slidably connected with the adjusting seat (5) and the transmission block (302) at both ends. The end of the driving shaft (4) is connected with a driving motor, and the side wall of the adjusting seat (5) is connected with an electric push rod.

2. A conveniently demoldable transmission case die-casting mold according to claim 1, characterized in that: The position of the driving rod (102) corresponds to the position of the moving groove (103), and the position of the first driving groove (601) corresponds to the position of the moving groove (103).

3. A conveniently demoldable transmission case die-casting mold according to claim 1, characterized in that: The end of the driving rod (102) is fixedly provided with a driving block, the position of the driving block corresponds to the position of the first driving groove (601), the first driving groove (601) is designed in an inclined manner, and the first driving groove (601) is elastically and slidably provided with a one-way block.

4. A conveniently demoldable transmission case die-casting mold according to claim 1, characterized in that: The side wall of the first sliding seat (6) is provided with a tension spring, and the first sliding seat (6) is connected with the fixed seat (8) through the tension spring.

5. A conveniently demoldable transmission case die-casting mold according to claim 1, characterized in that: The surface of the fixed seat (8) is provided with a return spring, and the upper end of the knocking rod (801) is connected with the fixed seat (8) through the return spring.

6. A conveniently demoldable transmission case die-casting mold according to claim 1, characterized in that: The second driving groove (701) is designed in a triangular shape, and the connecting block (802) is located in the second driving groove (701).

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