High-performance polymer precision structural part forming die

Abstract

The utility model belongs to the technical field of high-precision injection molds, and discloses a high-performance polymer precision structural part forming mold which comprises a fixed mold and a movable mold, a top plate and a positioning ring are arranged on the side, away from the movable mold, of the fixed mold, through injection molding holes are formed in the positioning ring and the fixed mold, and a bottom plate is arranged on the side, away from the fixed mold, of the movable mold. The movable mold comprises a mold foot and a mold frame, a forming cavity is formed in one side, close to the fixed mold, of the mold frame, a plurality of groups of demolding ejector pin holes are formed in the bottom in the forming cavity, and a stepless speed change demolding structure is arranged in the mold foot. The slow speed effectively avoids the problem of deformation of the precise structural part caused by too fast demolding, the product quality is powerfully guaranteed, the speed in the later period of demolding is increased, the production and processing efficiency is remarkably improved, and efficient and high-quality production is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to high -performance high polymer precision structural part forming die technical field, specifically is a kind of high-performance high polymer precision structural part forming die. BACKGROUND

[0002] In modern manufacturing industry, high-performance high polymer materials are widely used in many fields due to their excellent physical properties, chemical stability and processing characteristics. As a key forming process, high-performance high polymer precision structural part injection molding can accurately mold these materials into various complex and high-precision structural parts. From the tiny parts of electronic equipment to the key components in the aerospace field, high-performance high polymer precision structural parts are everywhere, and their quality and precision directly affect the overall performance and reliability of the product.

[0003] However, during the production of these precision structural parts, the demolding process faces many challenges. Demolding speed, as one of the key factors, has a crucial impact on product quality and production efficiency.

[0004] When the demolding speed is too fast, it will have a serious negative impact on the precision structural parts. Because the internal structure of high-performance high polymer materials is not completely stable after injection molding, the fast demolding speed will cause the structural parts to withstand a large external force in a short time. This external force may cause local stress concentration in the structural parts, leading to deformation. For precision structural parts, even the slightest deformation may cause them to lose their original designed precision, failing to meet the strict use requirements. For example, when manufacturing high-precision optical instrument parts, if deformation occurs due to too fast demolding speed, it may cause deviation in light refraction and reflection, seriously affecting the optical performance of the instrument.

[0005] On the other hand, if the demolding speed is too slow, although it can reduce the risk of deformation of the structural parts caused by demolding to some extent, it will greatly reduce the production efficiency. In today's fast-paced manufacturing environment, time is money, and the reduction of production efficiency means a decrease in output per unit of time and an increase in production cost. Especially for large-scale production enterprises, the extension of each injection molding cycle will accumulate considerable economic losses. Moreover, slower demolding speed may also cause the mold to be in working condition for a long time, increasing the wear of the mold and further increasing the production cost.

[0006] In summary, how to achieve efficient demolding while ensuring the precision of precision structural parts has become an important problem to be solved in the field of high-performance high polymer precision structural part injection molding. INVENTION CONTENTS

[0007] (I) Technical problems solved

[0008] The utility model provides a kind of high-performance high molecular precision structural part forming die to solve the deformation of precision structural part caused by fast demolding speed and the problem of slow demolding speed affecting production efficiency in the prior art.

[0009] (II) Technical solution

[0010] To achieve the above-mentioned purposes, the utility model provides the following technical scheme: a kind of high-performance high molecular precision structural part forming die, including fixed mould and movable mould, the side of fixed mould away from movable mould is provided with top plate, the side of top plate away from fixed mould is provided with locating ring, locating ring and fixed mould are provided with through injection hole, the side of movable mould away from fixed mould is provided with bottom plate, and bottom plate is provided with multiple groups of locating installation hole and KO hole.

[0011] Preferably, the movable mould includes a mold foot and a mold frame, the side of the bottom plate away from the injection molding machine is provided with a mold foot, the side of the mold foot away from the bottom plate is provided with a mold frame, the mold frame is machined with a forming cavity near the fixed mold, a plurality of demolding ejector pin holes are formed in the bottom of the forming cavity, and a stepless variable speed demolding structure is arranged in the mold foot.

[0012] Preferably, the stepless variable speed demolding structure includes a base plate, a demolding top plate, a square ejector pin, a limiting rod, a variable eccentricity straight line speed increasing assembly, a high elastic tendon bundle and a square ejector pin limiting block, the bottom of the mold foot is provided with a base plate, and the base plate is welded to the bottom plate, a square ejector pin is arranged at the center of the base plate, one end of the square ejector pin penetrates through the base plate and abuts against the KO hole, a square ejector pin limiting block is arranged on the base plate and welded to the base plate, the square ejector pin is slidably connected to the square ejector pin limiting block, the square ejector pin is fixedly installed on the base plate through the square ejector pin limiting block, four limiting rods are arranged on the base plate, one end of each limiting rod is welded to the base plate, the other end of each limiting rod is welded to the mold frame, a demolding top plate is slidably connected to the four limiting rods, a variable eccentricity straight line speed increasing assembly is arranged between the demolding top plate and the base plate, a high elastic tendon bundle is arranged on both sides of the variable eccentricity straight line speed increasing assembly, one end of the high elastic tendon bundle is fixedly connected to the base plate, and the other end of the high elastic tendon bundle is fixedly connected to the demolding top plate.

[0013] Preferably, the variable eccentricity straight line speed increasing assembly includes a gear, an involute eccentric wheel and a rotating shaft, a rack is formed on one side of the square ejector pin, the gear is connected to one side of the rack, the involute eccentric wheel is arranged on the side of the gear away from the square ejector pin limiting block, and the gear and the involute eccentric wheel are fixedly installed in the mold foot through the rotating shaft, one end of the rotating shaft is connected to the sidewall bearing of the mold foot, and the other end of the rotating shaft is connected to the square ejector pin limiting block bearing.

[0014] Preferably, the involute edge of the involute eccentric wheel abuts against the demolding top plate, and the distance between the involute edge and the axis of the rotating shaft gradually increases.

[0015] Preferably, the demolding top plate away from the substrate side is provided with a plurality of groups of demolding pins, and the plurality of groups of demolding pins are connected with the demolding pin holes in plug connection.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the high-performance high-molecular precise structural part forming die has the following beneficial effects:

[0018] 1. The high-performance high-molecular precise structural part forming die injection mold is provided with a fixed mold, a movable mold and a stepless speed change demolding structure, can realize slow-to-fast demolding operation, in the early stage of demolding, the slow speed effectively avoids the problem that the precise structural part is deformed due to too fast demolding, effectively guarantees the product quality, and the speed in the later stage of demolding is improved, thereby significantly improving the production and processing efficiency and ensuring efficient and high-quality production.

[0019] 2. The stepless speed change demolding structure is arranged, can slowly increase the demolding speed in stages, adopts a slow demolding speed when the structural part and the mold forming surface are combined, can prevent the precise structural part from being deformed and losing precision due to too fast demolding speed, and increases the demolding speed after the structural part and the forming surface are separated, can quickly discharge the structural part from the forming cavity, the fast demolding speed can greatly improve the production efficiency.

[0020] 3. The high-elasticity tendon is arranged, the high-elasticity tendon is used to pull the demolding top plate back to the reset position, compared with the traditional needle reset, the reset mode does not affect the forming cavity, the forming cavity can be designed to be larger, the larger forming cavity is not only beneficial to the production of large structural parts, but also can significantly improve the precision of the formed structural part, is particularly suitable for the production and processing of high-precision structural parts, and has extremely high practicability. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole structure schematic view of the utility model;

[0022] Figure 2 It is a movable mold structure schematic view of the utility model;

[0023] Figure 3 It is a stepless speed change demolding structure schematic view of the utility model;

[0024] Figure 4 It is a variable eccentricity distance straight line speed increasing assembly structure schematic view of the utility model;

[0025] Figure 5 It is a involute eccentric wheel and demolding top plate structure schematic view of the utility model.

[0026] In the figure: 1, fixed mold; 2, movable mold; 3, top plate; 4, bottom plate; 5, positioning ring; 6, injection hole; 7, KO hole; 8, mold foot; 9, mold frame; 10, forming cavity; 11, demolding ejector pin hole; 12, stepless speed change demolding structure; 13, base plate; 14, demolding top plate; 15, square ejector pin; 16, limiting rod; 17, variable eccentricity linear speed increasing assembly; 18, high elastic beam; 19, rack; 20, gear; 21, involute eccentric wheel; 22, rotating shaft; 23, demolding ejector pin; 24, square ejector pin limiting block. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Please refer to Figures 1-5 The present application provides a technical solution:

[0029] A high-performance high-molecular precise structural part forming die, comprising a fixed mold 1 and a movable mold 2, the side of the fixed mold 1 away from the movable mold 2 is provided with a top plate 3, the side of the top plate 3 away from the fixed mold 1 is provided with a positioning ring 5, the positioning ring 5 and the fixed mold 1 are provided with a through injection hole 6, the side of the movable mold 2 away from the fixed mold 1 is provided with a bottom plate 4, and the bottom plate 4 is provided with a plurality of positioning installation holes and KO holes 7. During production and processing, raw materials are injected from the back of the fixed mold 1 into the forming cavity 10 between the fixed mold 1 and the movable mold 2 for solidification and forming, after forming, the movable mold 2 moves away from the fixed mold 1, the injection molding machine top rod pushes against the square ejector pin 15 from the KO hole 7 to perform demolding operation, and after demolding, the movable mold 2 moves back to position and cooperates with the fixed mold 1 to continue production.

[0030] Further, the movable mold 2 comprises a mold foot 8 and a mold frame 9, the side of the bottom plate 4 away from the injection molding machine is provided with the mold foot 8, the side of the mold foot 8 away from the bottom plate 4 is provided with the mold frame 9, the mold frame 9 is processed with the forming cavity 10 near the side of the fixed mold 1, a plurality of demolding ejector pin holes 11 are formed in the bottom of the forming cavity 10, and the mold foot 8 is provided with a stepless speed change demolding structure 12.

[0031] Further, the stepless speed variable demolding structure 12 comprises a base plate 13, a demolding top plate 14, a square ejector pin 15, a limiting rod 16, a variable eccentricity linear speed increasing assembly 17, a high-elasticity tendon bundle 18, and a square ejector pin limiting block 24. The base plate 13 is arranged on the inner bottom of the mold foot 8 and is welded to the bottom plate 4. The square ejector pin 15 is arranged at the center of the base plate 13 and penetrates through the base plate 13 to abut against the KO hole 7. The square ejector pin limiting block 24 is arranged on the base plate 13 and is welded to the base plate 13. The square ejector pin 15 is slidably connected to the square ejector pin limiting block 24. The square ejector pin 15 is fixedly installed on the base plate 13 through the square ejector pin limiting block 24. Four groups of limiting rods 16 are arranged on the base plate 13. One end of each limiting rod 16 is welded to the base plate 13, and the other end of each limiting rod 16 is welded to the mold frame 9. The demolding top plate 14 is slidably connected to the four groups of limiting rods 16. The variable eccentricity linear speed increasing assembly 17 is arranged between the demolding top plate 14 and the base plate 13. The high-elasticity tendon bundle 18 is arranged on both sides of the variable eccentricity linear speed increasing assembly 17. One end of the high-elasticity tendon bundle 18 is fixedly connected to the base plate 13, and the other end of the high-elasticity tendon bundle 18 is fixedly connected to the demolding top plate 14. A clasp is recommended to be arranged on the limiting rod 16 to prevent the demolding top plate 14 from excessively pressing the variable eccentricity linear speed increasing assembly 17. The high-elasticity tendon bundle 18 has good elasticity and is recommended to be made of a high-temperature-resistant material. The high-elasticity tendon bundle 18 is used to provide tension. After the demolding operation is completed, the high-elasticity tendon bundle 18 pulls the demolding top plate 14 to reset it. The high-elasticity tendon bundle 18 is not recommended to be made of a metal spring, which is easy to lose elasticity under high temperature.

[0032] Further, the variable eccentricity linear speed increasing assembly 17 comprises a gear 20, an involute eccentric wheel 21, and a rotating shaft 22. One side of the square ejector pin 15 is provided with a rack 19. One side of the rack 19 is engaged with the gear 20. The gear 20 is provided with the involute eccentric wheel 21 on the side away from the square ejector pin limiting block 24. The gear 20 and the involute eccentric wheel 21 are fixedly installed in the mold foot 8 through the rotating shaft 22. One end of the rotating shaft 22 is connected to the side wall bearing of the mold foot 8, and the other end of the rotating shaft 22 is connected to the bearing of the square ejector pin limiting block 24. When the demolding operation is performed, the ejector pin of the injection molding machine abuts against the square ejector pin 15 from the KO hole 7. The square ejector pin 15 moves toward the demolding ejector pin hole 11. The rack 19 on the square ejector pin 15 cooperates with the gear 20 to make the gear 20 rotate. The gear 20 drives the involute eccentric wheel 21 to rotate. The rotating eccentricity of the involute eccentric wheel 21 gradually increases. The demolding top plate 14 abutting against the involute eccentric wheel 21 moves toward the demolding ejector pin hole 11.

[0033] Further, the involute edge of the involute eccentric wheel 21 abuts against the stripping top plate 14, and the distance from the axis of the rotating shaft 22 gradually increases. When the involute edge of the involute eccentric wheel 21 abuts against the stripping top plate 14, the distance from the axis of the rotating shaft 22 gradually increases, which can accelerate the linear velocity. The involute eccentric wheel 21 can also adopt the pattern of an Archimedes spiral.

[0034] Further, a plurality of stripping ejector pins 23 are arranged on the side of the stripping top plate 14 away from the base plate 13, and the plurality of stripping ejector pin holes 11 are connected to the plurality of stripping ejector pins 23 in a plug-in manner. During stripping, the plurality of stripping ejector pin holes 11 extend out of the plurality of stripping ejector pins 23 to abut against the product and push the product outward.

[0035] Structural description:

[0036] Fixed mold 1: a key component of the injection mold, cooperates with the movable mold 2 to form a molding space, and shapes the raw material during the injection molding process;

[0037] Movable mold 2: cooperates with the fixed mold 1, contains a molding cavity 10 and stripping-related structures, and is used for product molding and subsequent stripping operations;

[0038] Top plate 3: a plate-shaped component on the back of the fixed mold 1, used for installing the positioning ring 5 and assisting in injecting the raw material;

[0039] Bottom plate 4: a plate-shaped structure on the back of the movable mold 2, provided with positioning installation holes and KO holes 7, used for connecting the injection molding machine and transmitting stripping power;

[0040] Positioning ring 5: a ring-shaped part installed on the top plate 3, used for positioning the injection material inlet of the injection molding device, and guiding the injection of the raw material into the mold;

[0041] Injection hole 6: a hole passing through the positioning ring 5 and the fixed mold 1, which is a channel for the raw material to enter the molding cavity 10 of the mold during injection;

[0042] KO hole 7: a hole on the bottom plate 4, through which the ejector rod of the injection molding machine pushes the square ejector pin 15 to start the stripping process;

[0043] Mold foot 8: a block-shaped structure supporting the mold frame 9, connecting the bottom plate 4 and the mold frame 9, and internally installing the stepless variable-speed stripping structure 12;

[0044] Mold frame 9: a component of the movable mold 2 with the molding cavity 10, providing the main space for product molding, and cooperating with the fixed mold 1 to complete the product shaping;

[0045] Molding cavity 10: a cavity on the side of the mold frame 9 close to the fixed mold 1, which is a region where high-performance high-molecular materials are shaped into precision structural parts;

[0046] Stripping ejector pin hole 11: a small hole on the bottom of the molding cavity 10, used for installing the stripping ejector pin 23 and ejecting the product during stripping;

[0047] Stepless speed variable demolding structure 12: a complex structure installed in the mold foot 8, which can realize the change of demolding speed from slow to fast, guarantee product quality and production efficiency;

[0048] Base plate 13: the base plate of the stepless speed variable demolding structure 12, fixed at the bottom of the mold foot 8, providing a mounting base for other components;

[0049] Demolding top plate 14: a plate-shaped component in the stepless speed variable demolding structure 12, which drives the demolding pin 23 through movement to realize product demolding;

[0050] Square pin 15: a columnar part that transmits the pushing force of the injection molding machine top rod, one end abuts against the KO hole 7, and the other end cooperates with the rack 19 to start the demolding action;

[0051] Limiting rod 16: a rod-shaped structure connecting the base plate 13 and the mold frame 9, limiting the movement trajectory of the demolding top plate 14 to ensure the stability of the demolding process;

[0052] Variable eccentricity linear speed increasing assembly 17: the core component of the stepless speed variable demolding structure 12, composed of gear 20, involute eccentric wheel 21 and rotating shaft 22, realizing the change of demolding speed;

[0053] High-elasticity beam 18: an elastic structure connecting the base plate 13 and the demolding top plate 14, pulling the demolding top plate 14 back to its original position after demolding without affecting the design of the forming cavity 10;

[0054] Rack 19: a toothed structure opened on one side of the square pin 15, meshing with the gear 20 to convert the linear motion of the square pin 15 into the rotation of the gear 20;

[0055] Gear 20: a circular part cooperating with the rack 19, installed on the rotating shaft 22, driving the involute eccentric wheel 21 to rotate and realizing power transmission;

[0056] Involute eccentric wheel 21: an eccentric wheel with involute edges, rotating with the gear 20 and adjusting the demolding speed by changing the eccentricity;

[0057] Rotating shaft 22: a shaft-shaped part supporting the gear 20 and the involute eccentric wheel 21, connected at both ends by bearings to ensure stable rotation of the components;

[0058] Demolding pin 23: a needle-shaped part installed on the demolding top plate 14, passing through the demolding pin hole 11 and ejecting the product from the forming cavity 10 during demolding;

[0059] Square pin limiting block 24: a block-shaped part fixed on the base plate 13, limiting the movement direction of the square pin 15 to ensure its normal operation.

[0060] Working principle: At the beginning of production and processing, the raw material is injected into the molding cavity 10 between the fixed mold 1 and the movable mold 2 through the positioning ring 5 arranged on the top plate 3 away from the movable mold 2 side of the fixed mold 1, and through the penetrating injection hole 6. The movable mold 2 is composed of a mold foot 8 and a mold frame 9, and the mold foot 8 on the bottom plate 4 supports the mold frame 9, and the mold frame 9 is processed with a molding cavity 10 near the fixed mold 1 side to provide space for product molding. At this time, the fixed mold 1 and the movable mold 2 are closely matched, the raw material is solidified and formed in the molding cavity 10, and gradually forms a high-performance high-molecular precise structure part that meets the design requirements. When the product is formed, the movable mold 2 starts to move and separates from the fixed mold 1. At this time, the injection machine ejector pin pushes the square ejector pin 15 from the KO hole 7 on the bottom plate 4, triggering the demolding operation. One end of the square ejector pin 15 penetrates the base plate 13 and is in close contact with the KO hole 7. Under the push of the injection machine ejector pin, the square ejector pin 15 moves towards the demolding ejector pin hole 11. The square ejector pin 15 is provided with a rack 19 on one side, and the rack 19 is connected with a gear 20. With the movement of the square ejector pin 15, the rack 19 drives the gear 20 to rotate. The gear 20 and the involute eccentric wheel 21 are fixedly installed in the mold foot 8 through the rotating shaft 22, and the rotating shaft 22 is connected with the side wall of the mold foot 8 and the square ejector pin limiting block 24 bearing at both ends, to ensure smooth rotation. Therefore, when the gear 20 rotates, the involute eccentric wheel 21 rotates synchronously. The involute edge of the involute eccentric wheel 21 abuts against the demolding top plate 14, and the distance between the involute edge and the axis of the rotating shaft 22 gradually increases. With the rotation of the involute eccentric wheel 21, the distance between its edge and the axis of the rotating shaft 22 becomes farther and farther away, according to the relationship between the linear velocity of circular motion and the radius, which makes the linear velocity of the demolding top plate 14 abutting against by the involute eccentric wheel 21 gradually faster. The demolding top plate 14 is provided with a plurality of demolding ejector pins 23 on the side away from the base plate 13, and the demolding ejector pins 23 are connected with the demolding ejector pin hole 11 in plug connection. Under the driving of the demolding top plate 14, the plurality of demolding ejector pins 23 stretch out from the demolding ejector pin hole 11, abut against the product and push it outward, to realize product demolding. After the demolding operation is completed, the high-elasticity tendon bundle 18 plays a key role. The high-elasticity tendon bundle 18 is arranged on both sides of the variable eccentricity straight-line speed increasing assembly 17, and one end is fixedly connected with the base plate 13 and the other end is fixedly connected with the demolding top plate 14. Since the high-elasticity tendon bundle 18 has good elasticity and is made of high-temperature resistant material, it can provide tension to pull the demolding top plate 14 back to the original position. At the same time, the snap ring arranged on the limiting rod 16 prevents the demolding top plate 14 from excessively pressing the variable eccentricity straight-line speed increasing assembly 17, to ensure the safety and stability of each component during the resetting process. The movable mold 2 also moves back to the original position, matches with the fixed mold 1 again, and enters the next production cycle, to continuously and efficiently produce high-performance high-molecular precise structure parts.

[0061] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-performance polymer precision structural component molding die, comprising a fixed mold (1) and a moving mold (2), characterized in that: The fixed mold (1) is provided with a top plate (3) on the side away from the moving mold (2), and a positioning ring (5) is provided on the side away from the fixed mold (1). The positioning ring (5) and the fixed mold (1) are provided with through injection holes (6). The moving mold (2) is provided with a bottom plate (4) on the side away from the fixed mold (1). The bottom plate (4) is provided with multiple sets of positioning mounting holes and KO holes (7).

2. The high-performance polymer precision structural component molding die according to claim 1, characterized in that: The moving mold (2) includes a mold foot (8) and a mold frame (9). The mold foot (8) is provided on the side of the base plate (4) away from the injection molding machine. The mold frame (9) is provided on the side of the mold foot (8) away from the base plate (4). A molding cavity (10) is machined on the side of the mold frame (9) adjacent to the fixed mold (1). Multiple sets of ejector pin holes (11) are opened at the bottom of the molding cavity (10). A continuously variable speed ejection structure (12) is provided in the mold foot (8).

3. The high-performance polymer precision structural component molding die according to claim 2, characterized in that: The continuously variable speed demolding structure (12) includes a base plate (13), a demolding top plate (14), a square ejector pin (15), a limiting rod (16), a variable eccentricity linear speed-increasing component (17), a high-elasticity rib bundle (18), and a square ejector pin limiting block (24). The base plate (13) is provided at the bottom of the mold foot (8), and the base plate (13) is welded to the bottom plate (4). A square ejector pin (15) is provided at the center of the base plate (13). One end of the square ejector pin (15) passes through the base plate (13) and abuts against the KO hole (7). A square ejector pin limiting block (24) is provided on the base plate (13). The square ejector pin limiting block (24) is welded to the base plate (13), and the square ejector pin (15) and the square ejector pin limiting block (24) are slidably engaged. The square ejector pin (15) is fixedly installed on the base plate (13) by the square ejector pin limiting block (24). Four sets of limiting rods (16) are provided on the base plate (13). One end of the limiting rod (16) is welded to the base plate (13), and the other end of the limiting rod (16) is welded to the mold frame (9). The four sets of limiting rods (16) are slidably engaged with the demolding top plate (14). A variable eccentricity linear speed-increasing component (17) is provided between the demolding top plate (14) and the base plate (13). High elasticity rib bundles (18) are provided on both sides of the variable eccentricity linear speed-increasing component (17). One end of the high elasticity rib bundle (18) is fixedly connected to the base plate (13), and the other end of the high elasticity rib bundle (18) is fixedly connected to the demolding top plate (14).

4. The high-performance polymer precision structural component molding die according to claim 3, characterized in that: The variable eccentricity linear speed-increasing component (17) includes a gear (20), an involute eccentric wheel (21), and a rotating shaft (22). A rack (19) is provided on one side of the square ejector pin (15), and a gear (20) is meshed on one side of the rack (19). An involute eccentric wheel (21) is provided on the side of the gear (20) away from the square ejector pin limiting block (24). The gear (20) and the involute eccentric wheel (21) are fixedly installed in the mold foot (8) through the rotating shaft (22). One end of the rotating shaft (22) is connected to the bearing on the side wall of the mold foot (8), and the other end of the rotating shaft (22) is connected to the bearing of the square ejector pin limiting block (24).

5. The high-performance polymer precision structural component molding die according to claim 4, characterized in that: The involute edge of the involute eccentric wheel (21) abuts against the demolding top plate (14), and the distance between the involute edge and the axis of rotation (22) gradually increases.

6. The high-performance polymer precision structural component molding die according to claim 3, characterized in that: The demolding top plate (14) is provided with multiple sets of demolding ejector pins (23) on the side opposite to the base plate (13), and the multiple sets of demolding ejector pins (23) are connected to the demolding ejector pin holes (11).

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