High-precision optical lens injection mold and injection method thereof

Abstract

The present application relates to the technical field of lens manufacturing, and particularly relates to a high-precision optical lens injection mold and an injection molding method thereof. The injection mold comprises a mold core structure, an upper mold structure, a lower mold structure, a first demolding assembly and a second demolding assembly. The mold core structure comprises an upper mold core, an inner lower mold core and an outer lower mold core. The upper mold structure comprises an upper mold plate, an upper mold base plate and a gate sleeve. The lower mold structure comprises a lower mold plate, a support plate and a lower mold base plate. The first demolding assembly is connected with the outer lower mold core, and the second demolding assembly is connected with the inner lower mold core. The optical lens injection mold assembly of the present application changes the demolding mode from the inner lower mold core controlled face type ejection to the outer lower mold core controlled outer diameter core pulling. In the whole demolding process, the upper mold core and the inner lower mold core for controlling the lens face type respectively follow the upper mold structure and the lower mold structure and are relatively static. The upper mold core and the inner lower mold core do not participate in the action process, which reduces the damage of the mold core and makes the product have higher face type precision.

Description

Technical Field

[0001] This invention relates to the field of lens manufacturing technology, specifically to a high-precision optical lens injection mold and its injection molding method. Background Technology

[0002] With the rapid development of information technology and electronic products, people's high standards for product quality and personal experience have forced the rapid updating and iteration of technological research and development in various fields of mobile phones. Among these, obtaining high-pixel, high-quality mobile phone lenses has become a technological high ground that manufacturers are vying for. This has also led to the emergence of technological development paths for mobile phone lenses in multiple aspects, including optics, structure, and mold forming. Among these, designing a more stable and higher-precision mold forming method is crucial for supporting new optical and structural designs.

[0003] The two main mature lens manufacturing processes are injection molding and compression molding. Injection molding is the most efficient large-scale production technology and is often used to manufacture complex and delicate high-precision optical lenses. Nevertheless, due to the stringent requirements of the market for optical components, the manufacturing process remains a huge challenge. Most optical components require high optical quality, low residual stress, high reproducibility, and precisely controlled surface profiles. Traditional molding techniques can no longer meet the precision requirements of high-end products. Summary of the Invention

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a high-precision optical lens injection mold and its injection method.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a high-precision optical lens injection mold, comprising a mold core structure, an upper mold structure, a lower mold structure, a first demolding assembly, and a second demolding assembly.

[0006] The mold core structure includes an upper mold core, an inner lower mold core, and an outer lower mold core, which respectively form the upper surface, lower surface, and structural surface of the lens;

[0007] The upper mold structure includes an upper template, an upper mold base plate, and a sprue sleeve. The upper template is fixedly connected to the upper mold base plate. The upper mold core and the sprue sleeve are fixedly arranged in the upper template. An ejector part connected to the lens is formed between the sprue sleeve and the mold core structure.

[0008] The lower mold structure includes a lower template, a support plate, and a lower mold base plate. The lower template is fixed on the support plate, and the support plate is fixed on the lower mold base plate. The support plate has a cavity for accommodating the first demolding component and the second demolding component.

[0009] The first demolding component is connected to the outer lower mold core and is used to drive the outer lower mold core downward during demolding, so that the structural surface of the lens is separated from the outer lower mold core;

[0010] The second demolding assembly is connected to the inner lower mold core and is used to drive the inner lower mold core upward during demolding, so that the lower surface of the lens separates from the inner lower mold core.

[0011] Furthermore, the first demolding assembly includes a rocker arm, an ejector pin, a return plate, a connecting rod, and a second spring. The rocker arm is hinged in the middle to the lower mold base plate, its left side abuts against the return plate, and its right side abuts against the ejector pin. The ejector pin extends upward to abut against the upper mold plate. The lower end of the connecting rod is connected to the return plate, and its upper end is connected to the outer lower mold core. The top of the second spring is fixed, and its bottom is connected to the connecting rod, applying downward pressure to the connecting rod.

[0012] Furthermore, the first demolding assembly also includes a first spring and a limiting rod. The upper end of the first spring is connected to the upper mold base plate, and the lower end is connected to the limiting rod and applies downward pressure to the limiting rod. The limiting rod presses against the ejector pin in the mold closed state. In the mold closed state, the pressure of the second spring is less than the pressure of the first spring.

[0013] Furthermore, a vertical clearance is provided between the recovery plate and the lower mold base plate for vertical movement.

[0014] Furthermore, a limiting component is provided on the lower mold base plate, which is used to limit the range of motion of the return plate.

[0015] Furthermore, a hollow threaded rod is provided between the connecting rod and the outer lower mold core, and the two parts are connected by the hollow threaded rod.

[0016] Furthermore, a support rod is connected to the bottom of the inner lower mold core, the support rod is fixed to the support plate, and a vertical clearance is left between the support rod and the outer lower mold core.

[0017] Furthermore, the second demolding assembly includes an ejector plate, an ejector rod, and a drive rod. The ejector plate is movably disposed in the cavity. The bottom of the ejector rod is fixed to the ejector plate, and the top of the ejector rod abuts against the ejector part. The drive rod is used to drive the ejector plate to move upward.

[0018] Furthermore, a return spring is connected to the top of the ejector plate, and the top of the return spring is fixed to the support plate.

[0019] This invention also provides an injection molding method for a high-precision optical lens injection mold, comprising the following steps:

[0020] Step 1: Inject the lens into the mold core structure through the sprue bushing, so that the lens is formed in the mold core structure and the ejected part is formed between the sprue bushing and the mold core structure.

[0021] Step 2: Move the upper mold structure upward to separate it from the lower mold structure. The upper mold core and the sprue bushing move upward with the upper mold structure, so that the upper mold core separates from the upper surface of the lens and the sprue bushing separates from the ejector part.

[0022] Step 3: When the upper mold structure moves to a certain position, the limiting rod separates from the ejector pin on the right side of the rocker plate, and the ejector pin moves upward. On the left side of the rocker plate, the second spring applies pressure to make the connecting rod and the return plate move downward, thereby driving the lower outer mold core to move downward, so that the structural surface of the lens separates from the lower outer mold core.

[0023] Step 4: The drive rod drives the ejector plate and ejector rod to move upward to eject the ejector part, so that the lower surface of the lens is separated from the inner lower mold core, and the demolding is completed to remove the lens.

[0024] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0025] 1. The optical lens injection mold assembly of the present invention changes the demolding method of the optical lens from ejecting the inner lower mold core that controls the surface shape to pulling the outer lower mold core that controls the outer diameter. During the entire demolding process, the upper mold core and the inner lower mold core that control the surface shape of the lens follow the movement of the upper mold structure and the lower mold structure respectively and remain relatively stationary. The upper mold core and the inner lower mold core do not participate in the operation process, which reduces mold core damage and makes the product have higher surface accuracy.

[0026] 2. In the mold-open state, when the upper mold structure and the lower mold structure are separated, the upper surface and structural surface of the lens are demolded in one go, improving demolding efficiency. Furthermore, the outer lower mold core with controlled outer diameter moves relative to the lower template to achieve demolding, avoiding manufacturing errors caused by the movement of the mold core that should control the surface shape. This further improves the eccentricity accuracy of the upper and lower optical surfaces of the lens, thereby improving the optical quality of the lens.

[0027] 3. When molding products with a thicker outer diameter, the demolding force of the surface is less than that of the outer diameter, and the lens is prone to deformation during demolding, resulting in structural damage. This invention adopts a demolding method of pulling the core of the outer lower mold core to complete the demolding of the outer structural area first and then the surface demolding, so as to control the demolding force of each demolding step and solve the product defects caused by demolding difficulties.

[0028] 4. The optical lens injection mold assembly of the present invention can be applied to the molding of lenses with stepped surfaces or relatively curved surface shapes. Because the demolding process involves sequentially separating the structural areas and surface shapes, this process disperses the overall adhesion force of the lens to the mold into multiple segments. This avoids poor demolding on the lens surface and makes the lens less prone to deformation.

[0029] 5. The cavity of the optical lens injection mold of the present invention has multiple inserts. During the molding process, gas can be discharged through the gaps between the inserts. Therefore, the optical lens injection mold of the present invention has a good venting effect and effectively improves the gas trapping phenomenon during lens molding. Attached Figure Description

[0030] Figure 1 This is one of the structural schematic diagrams of a high-precision optical lens injection mold in a preferred embodiment of the present invention;

[0031] Figure 2 for Figure 1 Enlarged view of point A;

[0032] Figure 3 This is a second schematic diagram of the structure of a high-precision optical lens injection mold in a preferred embodiment of the present invention;

[0033] Figure 4 This is a third schematic diagram of the structure of a high-precision optical lens injection mold in a preferred embodiment of the present invention;

[0034] Figure 5 This is a fourth schematic diagram of the structure of a high-precision optical lens injection mold in a preferred embodiment of the present invention;

[0035] Reference numerals: 1. Mold core structure; 2. Upper mold structure; 3. Lower mold structure; 4. First demolding assembly; 5. Second demolding assembly; 6. Lens; 7. Ejector part; 11. Upper mold core; 12. Inner lower mold core; 13. Outer lower mold core; 21. Upper mold plate; 22. Upper mold base plate; 23. Sprue bushing; 31. Lower mold plate; 32. Support plate; 33. Lower mold base plate; 34. Support rod; 41. Rocker; 42. Ejector pin; 43. Return plate; 44. Connecting rod; 45. Second spring; 46. First spring; 47. Limiting rod; 48. Limiting component; 49. Hollow threaded rod; 51. Ejector plate; 52. Ejector rod; 53. Drive rod; 54. Return spring. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Reference Figure 1-5 As shown in the preferred embodiment of the present invention, a high-precision optical lens injection mold includes a mold core structure 1, an upper mold structure 2, a lower mold structure 3, a first demolding assembly 4, and a second demolding assembly 5.

[0039] The mold core structure 1 includes an upper mold core 11, an inner lower mold core 12, and an outer lower mold core 13, which respectively form the upper surface, lower surface, and structural surface of the lens 6;

[0040] The upper mold structure 2 includes an upper mold plate 21, an upper mold base plate 22, and a sprue sleeve 23. The upper mold plate 21 is fixedly connected to the upper mold base plate 22. The upper mold core 11 and the sprue sleeve 23 are fixedly arranged in the upper mold plate 21. An ejector part 7 connected to the lens 6 is formed between the sprue sleeve 23 and the mold core structure 1.

[0041] The lower mold structure 3 includes a lower template 31, a support plate 32, and a lower mold base plate 33. The lower template 31 is fixed on the support plate 32, and the support plate 32 is fixed on the lower mold base plate 33. The support plate 32 has a cavity for accommodating the first demolding component 4 and the second demolding component 5.

[0042] The first demolding component 4 is connected to the outer lower mold core 13 and is used to drive the outer lower mold core 13 downward during demolding, so that the structural surface of the lens 6 is separated from the outer lower mold core 13;

[0043] The second demolding component 5 is connected to the inner lower mold core 12 and is used to drive the inner lower mold core 12 upward during demolding, so that the lower surface of the lens 6 separates from the inner lower mold core 12.

[0044] The optical lens injection mold assembly of the present invention changes the demolding method of the optical lens 6 from ejecting the inner lower mold core 12 that controls the surface shape to pulling the outer lower mold core 13 that controls the outer diameter. During the entire demolding process, the upper mold core 11 and the inner lower mold core 12 that control the surface shape of the lens 6 move with the upper mold structure 2 and the lower mold structure 3 respectively and remain relatively stationary. The upper mold core 11 and the inner lower mold core 12 do not participate in the operation process, which reduces mold core damage and makes the product have higher surface accuracy.

[0045] In the mold-open state, when the upper mold structure 2 and the lower mold structure 3 separate, the upper surface and structural surface of the lens 6 are simultaneously demolded, improving demolding efficiency. Furthermore, the movement of the outer lower mold core 13 relative to the lower template 31 is controlled to achieve demolding, avoiding manufacturing errors caused by the movement of the mold core that should control the surface shape. This further improves the eccentricity accuracy of the upper and lower optical surfaces of the lens 6, thereby improving the optical quality of the lens 6. When molding products with a thicker outer diameter, the demolding force of the surface shape is less than that of the outer diameter, making the lens 6 prone to deformation during demolding, leading to structural damage. The optical lens injection mold assembly of this invention can be applied to the molding of lenses 6 with stepped surfaces or relatively curved surface shapes. Because the demolding process involves sequential segmented separation of the structural area and the surface shape, this process disperses the overall adhesion force of the lens 6 to the mold into multiple segments for resolution. This avoids poor demolding on the surface of the lens 6, making the lens 6 less prone to deformation. The cavity of the optical lens injection mold of the present invention has multiple inserts. During the molding process, gas can be discharged through the gaps between the inserts. Therefore, the optical lens injection mold of the present invention has a good venting effect and effectively improves the gas trapping phenomenon during lens molding.

[0046] As a preferred embodiment of the present invention, it may also have the following additional technical features:

[0047] In this embodiment, the first demolding assembly 4 includes a rocker arm 41, an ejector pin 42, a return plate 43, a connecting rod 44, and a second spring 45. The rocker arm 41 is hinged to the lower mold base plate 33 at the middle, abuts against the return plate 43 at the left, and abuts against the ejector pin 42 at the right. The ejector pin 42 extends upward to abut against the upper mold plate 21. The lower end of the connecting rod 44 is connected to the return plate 43, and the upper end is connected to the outer lower mold core 13. The top of the second spring 45 is fixed, the bottom is connected to the connecting rod 44, and it applies downward pressure to the connecting rod 44. The rocker plate 41 is hinged in the middle, and its left and right sides are connected to the return plate 43 and the ejector pin 42 respectively, so that the return plate 43 and the ejector pin 42 move in opposite directions. The ejector pin 42 abuts against the upper template 21 so as to hold the ejector pin 42 in the mold closing state. The left end of the rocker plate 41 abuts against the return plate 43. The return plate 43 and the outer lower mold core 13 are connected together by the connecting rod 44. The second spring 45 applies downward pressure to the connecting rod 44 so as to drive the return plate 43, the connecting rod 44, and the outer lower mold core 13 to move downward when the mold is opened.

[0048] In this embodiment, the first demolding assembly 4 further includes a first spring 46 and a limiting rod 47. The upper end of the first spring 46 is connected to the upper mold base plate 22, and the lower end is connected to the limiting rod 47, applying downward pressure to the limiting rod 47. The limiting rod 47 presses against the ejector pin 42 in the mold-closed state. In the mold-closed state, the pressure of the second spring 45 is less than the pressure of the first spring 46. By applying pressure to the ejector pin 42 through the first spring 46 and the limiting rod 47, and with the pressure of the first spring 46 being greater than that of the second spring 45, the ejector pin 42 is pressed down when the mold is first opened. When the upper mold core 11 is demolded, the lower mold core 13 is still not demolded. When the limiting rod 47 moves upward to a certain position, the lower mold core 13 begins to demold. This staged demolding avoids problems. In addition, the first spring 46 also plays a buffering role when the mold is opened.

[0049] In this embodiment, a vertical clearance is provided between the return plate 43 and the lower mold base plate 33. This vertical clearance allows the return plate 43 to move vertically, providing space for the outer lower mold core 13 to be demolded.

[0050] In this embodiment, a limiting member 48 is provided on the lower mold base plate 33, which is used to limit the range of motion of the return plate 43. By limiting the range of motion of the return plate 43 by the limiting member 48, excessive movement of the return plate 43 is avoided, which could affect the operation of other components.

[0051] In this embodiment, a hollow threaded rod 49 is provided between the connecting rod 44 and the outer lower mold core 13, and the two are connected by the hollow threaded rod 49. By connecting the outer lower mold core 13 and the connecting rod 44 through the hollow threaded rod 49, the inner lower mold core 12 and the second spring 45, which are fixed on the support plate 32, can be disposed inside the hollow threaded rod 49.

[0052] In this embodiment, a support rod 34 is connected to the bottom of the inner lower mold core 12. The support rod 34 is fixed on the support plate 32, and a vertical clearance is provided between the support rod 34 and the outer lower mold core 13. The inner lower mold core 12 is supported and fixed by the support rod 34 fixed on the support plate 32, and the vertical clearance between the support rod 34 and the outer lower mold core 13 provides space for demolding of the outer lower mold core 13.

[0053] In this embodiment, the second demolding assembly 5 includes an ejector plate 51, an ejector rod 52, and a drive rod 53. The ejector plate 51 is movably disposed in the cavity. The bottom of the ejector rod 52 is fixed to the ejector plate 51, and the top abuts against the ejector part 7. The drive rod 53 is used to drive the ejector plate 51 to move upward. The second demolding assembly 5 fixes the ejector rod 52 through the ejector plate 51. The ejector rod 52 passes through the support plate 32 and the lower mold plate 31 and abuts against the ejector part 7. The drive rod 53 drives the ejector plate 51 to move upward to eject the ejector part 7, thereby demolding the lower surface of the lens 6 from the inner lower mold core 12.

[0054] In this embodiment, a return spring 54 is connected to the top of the ejector plate 51, and the top of the return spring 54 is fixed to the support plate 32. After the drive rod 53 is reset, the return spring 54 causes the ejector plate 51 to move downward, thereby resetting the ejector plate 51.

[0055] This invention also provides an injection molding method for a high-precision optical lens injection mold, comprising the following steps:

[0056] Step 1: Inject the sprue into the mold core structure 1 through the sprue bushing 23, so that the lens 6 is formed in the mold core structure 1, and the ejected part 7 is formed between the sprue bushing 23 and the mold core structure 1.

[0057] like Figure 1 As shown, the mold is in a closed state. The upper mold plate 21 abuts against the ejector pin 42 and applies pressure, causing it to move downward a distance. The rocker plate 41 rotates under the pressure of the ejector pin 42. The return plate 43, which is placed above the rocker plate 41, moves upward a distance and is constrained in its positional relationship with other components by the action of the limiting member 48. The upper mold core 11, the outer lower mold core 13, and the inner lower mold core 12 are in a closed state. At this time, the lens 6 is formed by injection molding through the sprue bushing 23.

[0058] Step 2: Move the upper mold structure 2 upwards to separate it from the lower mold structure 3. The upper mold core 11 and the sprue bushing 23 move upwards along with the upper mold structure 2, causing the upper mold core 11 to separate from the upper surface of the lens 6, and the sprue bushing 23 to separate from the ejector part 7. Figure 3 As shown;

[0059] Step 3: When the upper mold structure 2 moves to a certain position, on the right side of the rocker plate 41, the limiting rod 47 separates from the ejector pin 42, and the ejector pin 42 moves upward. On the left side of the rocker plate 41, the second spring 45 applies pressure to make the connecting rod 44 and the return plate 43 move downward, thereby driving the outer lower mold core 13 to move downward, so that the structural surface of the lens 6 separates from the outer lower mold core 13.

[0060] like Figure 4As shown, the upper mold structure 2 moves upward, and the upper mold structure 2 and the lower mold structure 3 separate. The demolding of the upper mold core 11 is completed first. The upper mold structure 2 continues to move upward, and the ejector pin 42 is no longer restricted by the limit rod 47. The second spring 45 drives the connecting rod 44 and the return plate 43 to move downward. The outer lower mold core 13 moves downward together with the connecting rod 44, completing the demolding of the outer lower mold core 13.

[0061] Step 4: Drive rod 53 drives ejector plate 51 and ejector rod 52 to move upward, ejecting part 7, causing the lower surface of lens 6 to separate from inner lower mold core 12, completing demolding and removing lens 6. Figure 5 As shown.

[0062] The injection molding method of the present invention adopts the core-pulling demolding method of the outer lower mold core 13 to first complete the demolding of the outer structure area and then complete the demolding of the surface shape. It controls the demolding force of each demolding step, which solves the product defect problem caused by demolding difficulty and improves demolding efficiency.

[0063] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0064] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A high-precision optical lens injection mold, characterized in that: It includes a mold core structure (1), an upper mold structure (2), a lower mold structure (3), a first demolding component (4), and a second demolding component (5); The mold core structure (1) includes an upper mold core (11), an inner lower mold core (12), and an outer lower mold core (13). The upper mold core (11), the inner lower mold core (12), and the outer lower mold core (13) respectively form the upper surface, the lower surface, and the structural surface of the lens (6). The upper mold structure (2) includes an upper mold plate (21), an upper mold base plate (22), and a sprue sleeve (23). The upper mold plate (21) is fixedly connected to the upper mold base plate (22). The upper mold core (11) and the sprue sleeve (23) are fixedly arranged in the upper mold plate (21). An ejector part (7) connected to the lens (6) is formed between the sprue sleeve (23) and the mold core structure (1). The lower mold structure (3) includes a lower template (31), a support plate (32), and a lower mold base plate (33). The lower template (31) is fixed on the support plate (32), and the support plate (32) is fixed on the lower mold base plate (33). The support plate (32) has a cavity for accommodating the first demolding component (4) and the second demolding component (5). The first demolding assembly (4) includes a rocker arm (41), an ejector pin (42), a return plate (43), a connecting rod (44), and a second spring (45). The middle part of the rocker arm (41) is hinged to the lower mold base plate (33), the left part of the rocker arm (41) abuts against the return plate (43), and the right part of the rocker arm (41) abuts against the ejector pin (42). The ejector pin (42) extends upward to abut against the upper mold plate (21). The lower end of the connecting rod (44) is connected to the return plate (43). 4) The upper end is connected to the outer lower mold core (13), the top of the second spring (45) is fixed, the bottom of the second spring (45) is connected to the connecting rod (44) and applies downward pressure to the connecting rod (44), the return plate (43) and the outer lower mold core (13) are connected together through the connecting rod (44), and the second spring (45) applies downward pressure to the connecting rod (44) so ​​that the return plate (43), the connecting rod (44) and the outer lower mold core (13) can move downward when the mold is opened; The first demolding assembly (4) further includes a first spring (46) and a limiting rod (47). The upper end of the first spring (46) is connected to the upper mold base plate (22), and the lower end of the first spring (46) is connected to the limiting rod (47) and applies downward pressure to the limiting rod (47). The limiting rod (47) presses against the ejector pin (42) in the mold-closed state. In the mold-closed state, the pressure of the second spring (45) is less than the pressure of the first spring (46). The first demolding component (4) is connected to the outer lower mold core (13) and is used to drive the outer lower mold core (13) downward during demolding, so that the structural surface of the lens (6) is separated from the outer lower mold core (13); The second demolding component (5) is connected to the inner lower mold core (12) and is used to drive the inner lower mold core (12) upward during demolding, so that the lower surface of the lens (6) separates from the inner lower mold core (12).

2. The high-precision optical lens injection mold according to claim 1, characterized in that: A vertical clearance is provided between the recovery plate (43) and the lower mold base plate (33).

3. The high-precision optical lens injection mold according to claim 1, characterized in that: The lower mold base plate (33) is provided with a limiting member (48), which is used to limit the range of motion of the recovery plate (43).

4. The high-precision optical lens injection mold according to claim 1, characterized in that: A hollow threaded rod (49) is provided between the connecting rod (44) and the outer lower mold core (13) and is connected by the hollow threaded rod (49).

5. The high-precision optical lens injection mold according to claim 1, characterized in that: The bottom of the inner lower mold core (12) is connected to a support rod (34), which is fixed on the support plate (32). There is a vertical clearance between the support rod (34) and the outer lower mold core (13).

6. The high-precision optical lens injection mold according to claim 1, characterized in that: The second demolding assembly (5) includes an ejector plate (51), an ejector rod (52), and a drive rod (53). The ejector plate (51) is movably disposed in the cavity. The bottom of the ejector rod (52) is fixed on the ejector plate (51), and the top of the ejector rod (52) abuts against the ejector part (7). The drive rod (53) is used to drive the ejector plate (51) to move upward.

7. A high-precision optical lens injection mold according to claim 6, characterized in that: The top of the ejector plate (51) is connected to a reset spring (54), and the top of the reset spring (54) is fixed on the support plate (32).

8. An injection molding method for a high-precision optical lens injection mold, characterized in that, The injection mold for a high-precision optical lens, as described in any one of claims 1-7, comprises the following steps: Step 1: Inject the mold core structure (1) into the mold core structure (1) through the sprue bushing (23) so that the lens (6) is formed in the mold core structure (1) and the ejected part (7) is formed between the sprue bushing (23) and the mold core structure (1); Step 2, move the upper mold structure (2) upward to separate it from the lower mold structure (3), and move the upper mold core (11) and the sprue bushing (23) upward with the upper mold structure (2), so that the upper mold core (11) separates from the upper surface of the lens (6), and the sprue bushing (23) separates from the ejector part (7); Step 3: When the upper mold structure (2) moves to a certain position, on the right side of the rocker plate (41), the limiting rod (47) separates from the ejector pin (42), the ejector pin (42) moves upward, and on the left side of the rocker plate (41), the second spring (45) applies pressure to make the connecting rod (44) and the return plate (43) move downward, thereby driving the outer lower mold core (13) to move downward, so that the structural surface of the lens (6) separates from the outer lower mold core (13); Step 4: Drive rod (53) drives ejector plate (51) and ejector rod (52) to move upward to eject ejector part (7), so that the lower surface of lens (6) is separated from inner lower mold core (12) to complete demolding and remove lens (6).

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