Locking mechanism for automobile part injection mold

Abstract

The invention relates to the technical field of injection mold locking, and discloses an automobile part injection mold locking mechanism which comprises a supporting plate, a lower mold is fixedly connected to the center of the top of the supporting plate, sliding columns are arranged at the four corners of the bottom of the supporting plate correspondingly, and the sliding columns penetrate through and extend to the top of the supporting plate; and an extrusion plate is slidably connected between the surfaces of the four sliding columns, an upper mold is arranged at the bottom of the extrusion plate, supporting blocks are fixedly connected to the left side and the right side of the bottom of the supporting plate correspondingly, locking mechanisms are arranged on the front side and the rear side of each supporting block correspondingly, and a base is fixedly connected between the bottoms of the two supporting blocks. The locking mechanisms symmetrically arranged on the two sides of the supporting block are adopted, vertical pressure is converted into horizontal locking force in the mold closing process, the locking mechanisms are matched with an existing mold closing hydraulic system, the mold closing force is dynamically adjusted along with injection molding pressure through the mechanical property of the mechanisms, and stable mold closing is maintained during mold pressing forming of automobile parts.

Description

Technical Field

[0001] This invention relates to the field of injection mold locking technology, specifically to a locking mechanism for an injection mold of automotive parts. Background Art

[0002] The locking mechanism of an automotive component injection mold is a core subsystem of injection molding equipment. Its function is to maintain the closed state of the upper and lower molds during high-pressure injection of molten plastic, preventing the mold from expanding and causing flash or dimensional deviations. Traditional mechanisms typically consist of a support plate, a sliding guide assembly, and a locking unit. Their performance directly affects the molding accuracy and production cycle of automotive components (such as interior trim clips, electronic housings, etc.).

[0003] The locking mechanism of an automotive component injection mold is a core subsystem of injection molding equipment. Its function is to maintain the closed state of the upper and lower molds during high-pressure injection of molten plastic, preventing the mold from expanding and causing flash or dimensional deviations. Currently, mainstream locking mechanisms generally use hydraulic cylinders or servo motors to drive the mold clamping unit. Although these can provide basic closing force, the hydraulic system requires continuous power to maintain the mold clamping pressure, resulting in high energy consumption and leakage risks. Furthermore, because the mold clamping force is preset and cannot dynamically change with the injection pressure, the mold is prone to slight expansion during the peak melt pressure stage, causing overflow at the mold parting line of the automotive component. At low pressure stages, overloaded mold clamping leads to energy waste. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a locking mechanism for automotive component injection molds. This mechanism solves the problems of high energy consumption and leakage risks associated with existing hydraulic or motor-driven locking mechanisms for automotive component injection molds, which require continuous power supply. Furthermore, the static clamping force cannot adapt to dynamic changes in injection pressure, leading to overflow at the mold closing line and energy waste.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a locking mechanism for an injection mold of an automotive component, comprising a support plate, a lower mold fixedly connected to the center of the top of the support plate, sliding posts at the four corners of the bottom of the support plate, the sliding posts penetrating and extending to the top of the support plate, an extrusion plate slidably connected between the surfaces of the four sliding posts, an upper mold at the bottom of the extrusion plate, support blocks fixedly connected to the left and right sides of the bottom of the support plate, locking mechanisms at the front and rear sides of the support blocks, a base fixedly connected between the bottoms of two support blocks, a movable plate between the tops of the four locking mechanisms, a sliding groove at the four corners of the top of the movable plate, and a sliding block slidably connected within each of the four sliding grooves.

[0006] By adopting the above technical solution, four sliding columns form a rectangular guide frame, which constrains the extrusion plate to move only vertically, ensuring the mold closing alignment accuracy. The injection pressure is transmitted through the lower mold, support plate, sliding columns and base to form a stable load-bearing chain. The support block has a locking mechanism on both sides, making compact use of the equipment's longitudinal space.

[0007] Preferably, the locking mechanism includes a connecting rod, which is fixedly connected to a support block. A connecting block is slidably connected to one side of the connecting rod. A linkage rod is rotatably connected to the top end of the connecting block. A rotating rod is rotatably connected to the top of the linkage rod. The rotating rod is rotatably connected to the connecting rod. A limit block is fixedly connected to one end of the connecting rod.

[0008] By adopting the above technical solution, the sliding block is moved horizontally by the chute, the rotating rod is rotated, the connecting rod is wedged tightly to the connecting block and the limiting block, the mold expands slightly to trigger secondary locking, and the locking force is increased in real time to offset the melting pressure fluctuation. The pure mechanical lever force increase replaces the continuous work of hydraulic or electric motor. It is only necessary to keep the stop position to offset the pressure, thus eliminating energy consumption.

[0009] Preferably, the bottom of the extrusion plate is provided with four second connecting screws, which pass through the extrusion plate and the upper mold in sequence, and all four second connecting screws are threadedly connected to the extrusion plate and the upper mold.

[0010] By adopting the above technical solution, the upper mold can be separated by turning the four second connecting screws, which is suitable for the production of multiple varieties. The circumferentially distributed screws provide uniform preload force to prevent the mold from tilting when closing.

[0011] Preferably, the base has four first connecting screws at its bottom, with two first connecting screws on adjacent sides passing through the base and the support block in sequence, and the first connecting screws are threadedly connected to the base and the support block.

[0012] By adopting the above technical solution, the base can be separated by disassembling the first connecting screw, which facilitates the maintenance of the injection end or demolding mechanism. The double-sided screw assembly forms a bidirectional tensile structure to maintain the overall frame stability.

[0013] Preferably, all the sliding blocks are rotatably connected to the rotating rod.

[0014] By adopting the above technical solution, the hinge point absorbs the displacement tolerance between the slide and the lever, avoids mechanism jamming, and efficiently converts the horizontal displacement of the sliding block into the rotational kinetic energy of the rotating rod.

[0015] Preferably, a force-bearing plate is provided at the center of the top of the base, and push rods are evenly distributed on the top of the force-bearing plate. Springs are sleeved on the bottom of the surfaces of the push rods. A transition plate is provided between the two support blocks. The push rods pass through the transition plate, the support plate and the lower mold in sequence. The push rods are slidably connected to the transition plate, the support plate and the lower mold.

[0016] By adopting the above technical solution, the spring-driven transition plate synchronously lifts all push rods, ensuring uniform demolding of the workpiece, and the top surface of the push rod is flush with the mold surface, avoiding ejection residue or workpiece damage.

[0017] Preferably, the top of the push rod passes through the lower mold and is flush with its top surface, and two adjacent push rods are located in one cavity of the lower mold.

[0018] By adopting the above technical solution, a single mold cavity is equipped with two push rods to prevent thin-walled parts from being deformed during ejection. The push rod projection covers the key support area of ​​the workpiece, eliminating the risk of local sticking to the mold.

[0019] Preferably, the top and bottom of the spring abut against the bottom of the transition plate and the top of the force-bearing plate, respectively.

[0020] By adopting the above technical solution, the compressed spring stores potential energy when the mold is closed, and converts it into ejection kinetic energy at the moment the mold opens. The spring release timing matches the mold opening action, ensuring that the workpiece is completely ejected after being detached.

[0021] Preferably, a limiting disk is fixedly connected to the bottom end of the sliding column, and a corresponding overlapping groove is opened at the bottom of the support plate corresponding to the position of the sliding column. The diameter of the limiting disk is larger than the diameter of the sliding column, and the upper surface of the limiting disk is in contact with the inside of the overlapping groove.

[0022] By adopting the above technical solution, the limiting plate is locked into the overlapping groove to limit the mold closing end point and prevent overpressure damage to the mold.

[0023] Preferably, a through hole is provided at the center of the top of the base, and a gate is provided at the top of the upper mold corresponding to the position of the through hole of the base. The injection end is embedded in the through hole, and the through hole extends and communicates with the gate to form an injection channel.

[0024] By adopting the above technical solutions, the vertical through-hole design eliminates dead angles in the bends, reduces cold material retention, and the conical surface of the injection end is embedded and fitted to achieve zero leakage in high-pressure injection molding.

[0025] Working principle: The external press drives the extrusion plate to move downward along the four sliding columns, which in turn causes the upper mold fixed at its bottom and the lower mold at the top of the support plate to close. During this process, the extrusion plate presses the moving plate to move downward synchronously, and the sliding blocks in the grooves at the four corners of the top of the moving plate slide accordingly, forcing the sliding blocks to slide inward along the grooves. The movement of the sliding block pulls the rotating rod to rotate around the hinge point of the connecting rod. The rotating rod pushes the connecting rod to swing downward, causing the connecting rod to press the connecting block downward and move it downward. This forces the connecting block to slide horizontally along the connecting rod, creating a secondary compression on the extrusion plate to form a horizontal mechanical lock, which rigidly locks the support block and the base. During the injection molding stage, molten plastic is injected into the through hole through the injection end at the top of the base, and enters the lower mold cavity through the upper mold gate. When the melt pressure increases, the expansion force pushes the upper mold to expand slightly, causing the extrusion plate to rebound slightly and rise, which drives the moving plate to rise slightly in sync. Then, the sliding block is driven to move outward a second time through the slide groove, amplifying the rotation angle of the rotating rod. The linkage rod further wedges the connecting block, and the horizontal locking force is enhanced in real time to offset the peak melt pressure and prevent overflow at the mold closing line. When the mold is opened, the external press lifts the extrusion plate, and the moving plate rises accordingly to release the constraint on the sliding block. The sliding block moves back to its original position along the slide groove under the action of gravity, which drives the rotating rod to rotate. The connecting rod is released from the wedge-tight state, and the connecting block is released from the limit block, thus completing the mechanical unlocking. At this point, the workpiece remains in the mold cavity, the pre-compressed spring releases its potential energy, pushes the transition plate to move upward, and drives the evenly distributed push rods to rise synchronously. Adjacent push rods act as a group on the remaining mold cavities, and the top of the push rod protrudes from the lower mold surface, pushing the workpiece out evenly. After demolding, the external force is removed, the spring rebounds and the push rod returns to its original position, and at the same time the extrusion plate rises to the bottom of the sliding column and the limiting plate engages with the overlapping groove of the support plate, realizing a closed loop of mechanical self-adaptive locking, dynamic pressure stabilization and non-destructive demolding throughout the entire process.

[0026] This invention provides a locking mechanism for injection molds of automotive parts. It has the following advantages: 1. In this invention, by adopting a locking mechanism with symmetrical arrangement of support blocks on both sides, lever transmission through connecting rods, linkage rods and rotating rods, and in conjunction with the trajectory control of the sliding block by the sliding plate groove, the vertical pressure is converted into horizontal locking force during the mold closing process. Combined with the existing mold closing hydraulic system, the problems of system complexity and high maintenance cost are solved. The mechanical characteristics of the mechanism itself are used to dynamically adjust the mold closing force with the injection pressure, so as to maintain the stable closure of the mold during the compression molding of automotive parts.

[0027] 2. In this invention, a second connecting screw that penetrates the extrusion plate and the upper mold is used, combined with the first connecting screw assembly method of the base and the support block, to form a decoupled modular architecture. Compared with the existing technology of overall welding or bolt nesting fixing scheme, it solves the defect that the main frame needs to be disassembled when changing the mold. The functional unit can be separated by turning the screw, which simplifies the mold switching process of different specifications of automotive parts and adapts to the needs of flexible production.

[0028] 3. In this invention, a uniformly distributed push rod on the top of the base is used in conjunction with a spring pre-compression structure. When the mold is opened, the spring potential energy synchronously pushes multiple push rods through the top surface of the lower mold. Compared with the existing single-point ejection or pneumatic drive scheme, this invention solves the problem of deformation and cracking caused by local stress concentration in thin-walled parts. The multi-rod synergistic effect disperses the ejection force, so that the complex structure of the automotive parts maintains its shape integrity during the demolding process.

[0029] 4. In this invention, an integrated design of a built-in injection end and a through hole on the top of the base is adopted, so that the output port of the external injection molding machine is directly connected to the top of the mold cavity through the base. Compared with the existing technology that relies on external bends or independent hot runners, this invention solves the problems of material retention and uneven temperature caused by multi-stage transfers. By shortening the flow path of molten plastic, heat loss is reduced, and the material fluidity and filling fullness are improved during the injection molding of automotive parts. Attached Figure Description

[0030] Figure 1 This is a perspective view of a locking mechanism for an injection mold of an automotive component according to the present invention; Figure 2 This is a schematic diagram of the mold closing mechanism for a locking mechanism of an injection mold for an automotive component according to the present invention; Figure 3 This is a schematic diagram of the locking mechanism of an injection mold locking mechanism for automotive parts according to the present invention; Figure 4 This is a schematic diagram of the mold opening of a locking mechanism for an injection mold of an automotive component according to the present invention; Figure 5 This is an exploded view of a locking mechanism for an injection mold of an automotive component according to the present invention; Figure 6 This is a schematic cross-sectional view of the moving plate of the locking mechanism for an injection mold of an automotive component according to the present invention.

[0031] The components include: 1. Base; 2. Support block; 3. Support plate; 4. Extrusion plate; 5. Moving plate; 6. Sliding block; 7. Locking mechanism; 701. Connecting rod; 702. Connecting block; 703. Linking rod; 704. Rotating rod; 705. Limiting block; 8. Upper mold; 9. Lower mold; 10. Sliding column; 11. Spring; 12. Push rod; 13. Force plate; 14. Transition plate; 15. First connecting screw; 16. Second connecting screw; 17. Slide groove. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. 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.

[0033] Please see the appendix Figure 1 - Appendix Figure 6 This invention provides a locking mechanism for an injection mold of an automotive component, including a support plate 3. A lower mold 9 is fixedly connected to the center of the top of the support plate 3. Sliding columns 10 are provided at the four corners of the bottom of the support plate 3, extending through and to the top of the support plate 3. An extrusion plate 4 is slidably connected between the surfaces of the four sliding columns 10. An upper mold 8 is provided at the bottom of the extrusion plate 4. Support blocks 2 are fixedly connected to the left and right sides of the bottom of the support plate 3. Locking mechanisms 7 are provided on the front and rear sides of the support blocks 2. A base 1 is fixedly connected between the bottoms of two support blocks 2. A movable plate 5 is provided between the tops of the four locking mechanisms 7. A sliding groove 17 is provided at the four corners of the top of the movable plate 5, and a sliding block 6 is slidably connected in each of the four sliding grooves 17.

[0034] Specifically, the support plate 3 serves as the core load-bearing body, and the vertical movement trajectory of the extrusion plate 4 is constrained by the sliding pillars 10 to ensure the mold closing alignment accuracy. The lower mold 9 is fixed in the center to avoid eccentric deformation. The four sliding pillars 10 are symmetrically distributed to evenly bear the injection molding expansion force and prevent the extrusion plate 4 from overturning. The four sliding pillars 10 vertically penetrate the four corners of the support plate 3 to form a rigid rectangular guide frame. The through holes at the four corners of the extrusion plate 4 are clearance-fitted with the sliding pillars 10 to ensure that it can only move in the vertical direction. When the mold is closed, the extrusion plate 4 presses down to drive the upper mold 8 to close the lower mold 9. When the mold is opened, the limiting plate at the bottom of the sliding pillar 10 is engaged with the overlapping groove at the bottom of the support plate 3 to restrict the return end point of the extrusion plate 4.

[0035] The locking mechanism 7 includes a connecting rod 701, which is fixedly connected to the support block 2. A connecting block 702 is slidably connected to one side of the connecting rod 701. A connecting rod 703 is rotatably connected to the top end of the connecting block 702. A rotating rod 704 is rotatably connected to the top of the connecting rod 703. The rotating rod 704 is rotatably connected to the connecting rod 701. A limit block 705 is fixedly connected to one end of the connecting rod 701.

[0036] Specifically, when the moving plate 5 moves downward, the inner wall of its groove 17 presses the sliding block 6 to move outward horizontally. The sliding block 6 pulls the rotating rod 704 to rotate around the hinge point of the connecting rod 701, pushing the connecting rod 703 to swing downward. The bottom end of the connecting rod 703 wedges into the connecting block 702 and the limiting block 705 to form a horizontal mechanical lock. When the injection molding pressure increases, the mold slightly expands and triggers the sliding block 6 to move outward a second time, further wedging the connecting block 702 and realizing the adaptive increase of the locking force.

[0037] The bottom of the extrusion plate 4 is provided with four second connecting screws 16. The four second connecting screws 16 pass through the extrusion plate 4 and the upper mold 8 in sequence, and the four second connecting screws 16 are threadedly connected to the extrusion plate 4 and the upper mold 8.

[0038] Specifically, four second connecting screws 16 are evenly distributed around the extrusion plate 4. Twisting the screws can separate the upper mold 8 from the extrusion plate 4, enabling quick mold replacement. The first connecting screws 15 symmetrically pass through both sides of the base 1 and the support block 2. After removing the screws, the base 1 and the support block 2 can be decoupled, which is convenient for maintaining the injection end or replacing the demolding spring 11.

[0039] The base 1 has four first connecting screws 15 at its bottom. Two first connecting screws 15 on adjacent sides pass through the base 1 and the support block 2 in sequence, and the first connecting screws 15 are threadedly connected to the base 1 and the support block 2.

[0040] Specifically, the four first connecting screws 15 are symmetrically arranged in two groups on the left and right sides of the base 1. Each group of two screws penetrates the side wall of the base 1 and the bottom of the support block 2, forming a two-way tensile structure. When the screws are screwed in, the mating surfaces of the base 1 and the support block 2 are tightened simultaneously to eliminate assembly gaps. When disassembling, the base 1 can be separated by screwing it out in the opposite direction, which is convenient for maintaining the injection molding end below.

[0041] All sliding blocks 6 are rotatably connected to the rotating rod 704.

[0042] Specifically, the sliding block 6 is hinged to the end of the rotating rod 704 via a pin, which converts horizontal sliding into rotational motion. When the sliding block 6 moves horizontally within the slide groove 17, the hinge point allows the rotating rod 704 to rotate freely around the connecting rod 701, thus avoiding motion interference.

[0043] A force-bearing plate 13 is provided at the top center of the base 1. A push rod 12 is evenly distributed on the top of the force-bearing plate 13. A spring 11 is sleeved on the bottom of the surface of each push rod 12. A transition plate 14 is provided between the two support blocks 2. The push rods 12 pass through the transition plate 14, the support plate 3 and the lower mold 9 in sequence. The push rods 12 are slidably connected to the transition plate 14, the support plate 3 and the lower mold 9.

[0044] Specifically, after the mold is opened, the pre-compressed spring 11 releases its potential energy, pushing the transition plate 14 to move vertically upward along the inner wall of the support block 2. The transition plate 14 drives all the push rods 12 to rise synchronously. The top of the push rods 12 extends beyond the surface of the lower mold 9 and acts evenly on the bottom surface of the workpiece. Two adjacent push rods 12 are distributed in groups in the projection area of ​​a single mold cavity, so that the ejection force covers the edge and center of the workpiece.

[0045] The top of the push rod 12 passes through the lower mold 9 and is flush with its top surface. Two adjacent push rods 12 are located in one cavity of the lower mold 9.

[0046] Specifically, each set of two push rods 12 is arranged symmetrically at the geometric center of the mold cavity, one near the edge of the contour and the other near the center area. The edge push rod 12 pushes out of the outer periphery of the workpiece, and the center push rod 12 prevents the center from sinking. The two points work together to avoid warping of thin-walled parts.

[0047] The top and bottom of the spring 11 abut against the bottom of the transition plate 14 and the top of the force plate 13, respectively.

[0048] Specifically, when the mold is closed, the transition plate 14 presses down to compress the spring 11. The potential energy of the spring 11 is stored between the force plate 13 and the transition plate 14. After the mold is opened, the constraint is released, and the spring 11 rebounds to push the transition plate 14 upward, which is converted into the lifting kinetic energy of the push rod 12.

[0049] The bottom end of the sliding column 10 is fixedly connected to a limiting plate. The bottom of the support plate 3 is provided with corresponding overlapping grooves at the positions of the sliding column 10. The diameter of the limiting plate is larger than the diameter of the sliding column 10, and the upper surface of the limiting plate is in contact with the inside of the overlapping groove.

[0050] Specifically, at the end of mold closing, the bottom limiting plate of the sliding column 10 is embedded in the overlapping groove of the support plate 3. The diameter of the limiting plate is larger than the size constraint of the sliding column 10 to prevent the extrusion plate 4 from coming out. The injection molten material is injected into the through hole through the injection end of the base 1 and reaches the gate of the upper mold 8 through the vertical channel to form a straight flow channel without turning. This channel is connected to the mold cavity of the lower mold 9 to ensure that the molten material directly fills the cavity.

[0051] A through hole is provided at the center of the top of the base 1. A gate is provided at the top of the upper mold 8 corresponding to the position of the through hole of the base 1. The injection end is embedded in the through hole, and the through hole extends and communicates with the gate to form an injection channel.

[0052] Specifically, when the injection end is embedded in the through hole, the conical surface fits to form a radial seal; the inner wall of the channel is polished to reduce flow resistance, and the molten material rises vertically from the center of the base 1 and is injected directly into the upper mold 8 gate through the through hole without any flow direction turning.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A locking mechanism for an injection mold of an automotive component, comprising a support plate (3), characterized in that, A lower mold (9) is fixedly connected to the center of the top of the support plate (3). Sliding columns (10) are provided at the four corners of the bottom of the support plate (3). The sliding columns (10) penetrate and extend to the top of the support plate (3). An extrusion plate (4) is slidably connected between the surfaces of the four sliding columns (10). An upper mold (8) is provided at the bottom of the extrusion plate (4). Support blocks (2) are fixedly connected to the left and right sides of the bottom of the support plate (3). Locking mechanisms (7) are provided on the front and back sides of the support blocks (2). A base (1) is fixedly connected between the bottoms of the two support blocks (2). A moving plate (5) is provided between the tops of the four locking mechanisms (7). A sliding groove (17) is provided at the four corners of the top of the moving plate (5). A sliding block (6) is slidably connected in each of the four sliding grooves (17).

2. The locking mechanism for an injection mold of an automotive component according to claim 1, characterized in that, The locking mechanism (7) includes a connecting rod (701), which is fixedly connected to the support block (2). A connecting block (702) is slidably connected to one side of the connecting rod (701). A connecting rod (703) is rotatably connected to the top end of the connecting block (702). A rotating rod (704) is rotatably connected to the top of the connecting rod (703). The rotating rod (704) is rotatably connected to the connecting rod (701). A limit block (705) is fixedly connected to one end of the connecting rod (701).

3. The locking mechanism for an injection mold of an automotive component according to claim 1, characterized in that, The bottom of the extrusion plate (4) is provided with four second connecting screws (16), which pass through the extrusion plate (4) and the upper mold (8) in sequence, and the four second connecting screws (16) are threadedly connected between the extrusion plate (4) and the upper mold (8).

4. The locking mechanism for an injection mold of an automotive component according to claim 1, characterized in that, The base (1) has four first connecting screws (15) at its bottom. Two of the first connecting screws (15) on the adjacent side pass through the base (1) and the support block (2) in sequence, and the first connecting screws (15) are threadedly connected to the base (1) and the support block (2).

5. The locking mechanism for an injection mold of an automotive component according to claim 1, characterized in that, The sliding blocks (6) are all rotatably connected to the rotating rod (704).

6. The locking mechanism for an injection mold of an automotive component according to claim 1, characterized in that, A force-bearing plate (13) is provided at the top center of the base (1). A push rod (12) is provided on the top of the force-bearing plate (13). A spring (11) is sleeved on the bottom of the surface of each of the push rods (12). A transition plate (14) is provided between the two support blocks (2). Each of the push rods (12) passes through the transition plate (14), the support plate (3), and the lower mold (9) in sequence. Each of the push rods (12) is slidably connected to the transition plate (14), the support plate (3), and the lower mold (9).

7. A locking mechanism for an injection mold of an automotive component according to claim 6, characterized in that, The top of the push rod (12) passes through the lower mold (9) and is flush with its top surface. Two adjacent push rods (12) are located in one cavity of the lower mold (9).

8. A locking mechanism for an injection mold of an automotive component according to claim 6, characterized in that, The top and bottom of the spring (11) abut against the bottom of the transition plate (14) and the top of the force plate (13), respectively.

9. A locking mechanism for an injection mold of an automotive component according to claim 1, characterized in that, The bottom end of the sliding column (10) is fixedly connected to a limiting plate. The bottom of the support plate (3) is provided with corresponding overlapping grooves at the position of the sliding column (10). The diameter of the limiting plate is larger than the diameter of the sliding column (10), and the upper surface of the limiting plate is in contact with the inside of the overlapping groove.

10. A locking mechanism for an injection mold of an automotive component according to claim 1, characterized in that, The base (1) has a through hole at the top center position. The upper mold (8) has a gate at the position corresponding to the through hole of the base (1). The injection end is embedded in the through hole, and the through hole extends and communicates with the gate to form an injection channel.

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