A high-efficiency demolding auxiliary mechanism for injection molding of optical lenses

Abstract

This utility model discloses a high-efficiency demolding auxiliary mechanism for injection molding of optical lenses, belonging to the field of optical lens manufacturing technology. It includes a base plate with multiple connecting holes at its upper end. A rotating component is fixedly connected to the upper end of the base plate, and a demolding mechanism is fixedly connected to the upper end of the rotating component. The rotating component allows the demolding mechanism to rotate flexibly. In conjunction with the connecting component, it enables rapid and precise positioning of lenses in different positions and postures within the injection mold. Compared to traditional manual removal, this significantly improves demolding efficiency. Furthermore, the lens can be transferred after demolding. Through the negative pressure adsorption design in the demolding component, a negative pressure pump draws air from the negative pressure box, causing the suction cup to create negative pressure to adsorb the lens. This avoids the hard contact between the traditional mechanical gripper and the lens surface. In addition, the release paper pasted on the inner surface of the suction cup effectively prevents the suction cup from contaminating the lens or leaving marks on the lens surface, improving the practicality of the auxiliary mechanism.

Description

Technical Field

[0001] This utility model relates to the field of optical lens manufacturing technology, and more specifically, to a high-efficiency demolding auxiliary mechanism for injection molding of optical lenses. Background Technology

[0002] Optical lenses are an essential component in machine vision systems, directly affecting image quality and the implementation and effectiveness of algorithms. Injection molding of optical lenses can create complex structures (such as internal threads, positioning grooves, and snap-fits) in one step, resulting in low mass production costs and making them suitable for consumer products such as mobile phone lenses and home camera lenses.

[0003] Optical lens injection molding technology has become a core means of mass production of consumer-grade optical lenses due to its unique process advantages. Based on the plasticity of polymer materials, this technology injects optical-grade plastic into a precision mold cavity through high-temperature melting, and then forms complex structures in one step after cooling and solidification, which can greatly improve production efficiency.

[0004] In the production and processing of optical lenses, multiple lenses can be produced at once when using injection molding. However, when demolding after the injection mold is opened, the mechanical gripper is prone to scratching the lens surface. Manual removal of parts is not only inefficient, but also has problems such as sweat contamination and fingerprint residue.

[0005] Therefore, a high-efficiency demolding auxiliary mechanism for injection molding of optical lenses is proposed to address the above problems. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] To address the problems existing in the prior art, the purpose of this utility model is to provide a high-efficiency demolding auxiliary mechanism for injection molding of optical lenses, which can achieve the function of fast and non-destructive demolding.

[0008] 2. Technical Solution

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] A high-efficiency demolding auxiliary mechanism for injection molding of optical lenses includes a base plate with multiple connecting holes at its upper end. A rotating assembly is fixedly connected to the upper end of the base plate, and a demolding mechanism is fixedly connected to the upper end of the rotating assembly. The demolding mechanism includes a connecting plate with a frame fixedly connected to its upper end. Slide rails are fixedly connected to the left and right walls of the inner cavity of the frame. A second motor is fixedly connected to the upper end of the connecting plate. The output end of the second motor is fixedly connected to a second bevel gear set via a coupling. A lead screw is fixedly connected to the inner surface of the second bevel gear set. A second rotating seat is rotatably connected to the outer surface of the lead screw. The lower end of the second rotating seat is fixedly connected to the bottom wall of the inner cavity of the connecting plate. A connecting assembly is threadedly connected to the outer surface of the lead screw, and a demolding assembly is fixedly connected to the front of the connecting assembly.

[0011] Furthermore, the rotating assembly includes a motor and a support frame. The output end of the motor is fixedly connected to a bevel gear set via a coupling. A drive shaft is fixedly connected to the inner surface of the bevel gear set. A rotating seat is rotatably connected to the outer surface of the drive shaft. The lower end of the rotating seat is fixedly connected to the upper end of the base plate. A connecting seat is fixedly connected to the upper end of the drive shaft. The outer surface of the connecting seat is in close contact with the upper inner surface of the support frame and can rotate along the upper inner surface of the support frame.

[0012] Furthermore, the connecting component includes a movable block, a support plate is fixedly connected to the front end of the movable block, a motor is fixedly connected to the upper end of the support plate, a connecting block is fixedly connected to the output end of the motor through a coupling, a rotating seat is fixedly connected to the upper end of the support plate, and the inner surface of the rotating seat is rotatably connected to the outer surface of the connecting block.

[0013] Furthermore, the demolding assembly includes an L-shaped plate, with a hydraulic cylinder fixedly connected to the upper end of the L-shaped plate. A negative pressure box is fixedly connected to the output end of the hydraulic cylinder, and at least one negative pressure pump is fixedly connected to the upper end of the negative pressure box. A flexible hose is fixedly connected to the output end of the negative pressure pump, and the outer surface of the flexible hose is fixedly connected to and communicates with the inner surface of the negative pressure box. Multiple suction cups are fixedly connected to and communicate with the lower end of the negative pressure box, and release paper is pasted on the inner surface of the suction cups. After the mold is opened, the suction cups are pushed towards the lens surface by the action of the hydraulic cylinder. When they are in contact with the lens surface, the negative pressure pump is activated, and air is drawn out of the negative pressure box through the flexible hose, causing the suction cups to generate negative pressure to adsorb the lens. The release paper pasted on the inner surface of the suction cups can protect the surface of the suction cups before use, preventing dust and other impurities from affecting the adsorption effect, and also preventing the suction cups from leaving marks on the lens.

[0014] Furthermore, the rear end of the L-shaped plate is fixedly connected to the front end of the connecting block, the inner surface of the moving block is threadedly connected to the outer surface of the lead screw, and the inner surface of the moving block is slidably connected to the outer surfaces of the two slide rails.

[0015] Furthermore, the lower end of the connecting plate is fixedly connected to the upper end of the connecting seat, the lower end of the motor is fixedly connected to the upper end of the base plate, and the lower end of the support frame is fixedly connected to the upper end of the base plate.

[0016] 3. Beneficial Effects

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] (1) This solution can drive the demolding mechanism to rotate flexibly through the rotating component. In conjunction with the connecting component, it can achieve rapid and accurate positioning of lenses in different positions and postures in the injection mold. Compared with traditional manual part removal, it greatly improves demolding efficiency. At the same time, the lens can be transferred after demolding. Through the negative pressure adsorption design in the demolding component, the negative pressure pump draws air from the negative pressure box to make the suction cup generate negative pressure to adsorb the lens, avoiding the hard contact between the traditional mechanical gripper and the lens surface. In addition, the release paper pasted on the inner surface of the suction cup can effectively prevent the suction cup from contaminating the lens or leaving marks on the lens surface, thus improving the practicality of the auxiliary mechanism. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the rotating component of this utility model;

[0021] Figure 3 This is a schematic diagram of the demolding mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the connection component of this utility model;

[0023] Figure 5 This is a schematic diagram of the demolding component of this utility model.

[0024] Explanation of the labels in the diagram:

[0025] 1. Base plate; 2. Connecting hole; 3. Rotating assembly; 31. Motor 1; 32. Bevel gear set 1; 33. Support frame; 34. Drive shaft; 35. Rotating seat 1; 36. Connecting seat; 4. Demolding mechanism; 41. Connecting plate; 42. Frame; 43. Slide rail; 44. Motor 2; 45. Bevel gear set 2; 46. Lead screw; 47. Rotating seat 2; 48. Connecting assembly; 481. Moving block; 482. Support plate; 483. Motor 3; 484. Connecting block; 485. Rotating seat 3; 49. Demolding assembly; 491. L-shaped plate; 492. Hydraulic cylinder; 493. Negative pressure box; 494. Negative pressure pump; 495. Hoses; 496. Suction cup. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Example 1:

[0030] Please see Figure 1-5 A high-efficiency demolding auxiliary mechanism for injection molding of optical lenses includes a base plate 1. Multiple connecting holes 2 are provided on the upper end of the base plate 1. A rotating assembly 3 is fixedly connected to the upper end of the base plate 1. A demolding mechanism 4 is fixedly connected to the upper end of the rotating assembly 3. The demolding mechanism 4 includes a connecting plate 41. A frame 42 is fixedly connected to the upper end of the connecting plate 41. Slide rails 43 are fixedly connected to the left and right walls of the inner cavity of the frame 42. A second motor 44 is fixedly connected to the upper end of the connecting plate 41. A bevel gear set 45 is fixedly connected to the output end of the second motor 44 via a coupling. A lead screw 46 is fixedly connected to the inner surface of the bevel gear set 45. A rotating seat 47 is rotatably connected to the outer surface of the lead screw 46. The lower end of the rotating seat 47 is fixedly connected to the bottom wall of the inner cavity of the connecting plate 41. A connecting assembly 48 is threadedly connected to the outer surface of the lead screw 46. A demolding assembly 49 is fixedly connected to the front of the connecting assembly 48.

[0031] Motor 244 can be a servo motor ECMA-C20807RS, which has high responsiveness and high positioning accuracy, rated power of 750W and speed up to 3000rpm.

[0032] This solution uses a base plate 1 and multiple connecting holes 2 to facilitate the fixing of the auxiliary mechanism in the injection molding workshop of optical lenses. After the injection mold is opened, the demolding mechanism 4 can be rotated to the top of the injection mold by the action of the rotating component 3. Through the motor 44, the lead screw 46 and the slide rail 43, the connecting component 48 and the demolding component 49 can be smoothly sent into the injection mold. The position of the demolding component 49 can be adjusted by the connecting component 48 to align it with the optical lens produced by injection molding. Finally, the demolding component 49 uses negative pressure to remove the optical lens from the injection mold, completing the demolding. After demolding, the optical lens can be transferred to the designated position for placement through the cooperation of various components, which greatly improves the demolding efficiency.

[0033] Please see Figure 1-2 The rotating assembly 3 includes a motor 31 and a support frame 33. The lower end of the motor 31 is fixedly connected to the upper end of the base plate 1, and the lower end of the support frame 33 is fixedly connected to the upper end of the base plate 1. The output end of the motor 31 is fixedly connected to a bevel gear set 32 ​​via a coupling. A drive shaft 34 is fixedly connected to the inner surface of the bevel gear set 32. A rotating seat 35 is rotatably connected to the outer surface of the drive shaft 34. The lower end of the rotating seat 35 is fixedly connected to the upper end of the base plate 1, and a connecting seat 36 is fixedly connected to the upper end of the drive shaft 34. The lower end of the connecting plate 41 is fixedly connected to the upper end of the connecting seat 36. The outer surface of the connecting seat 36 is in close contact with the upper inner surface of the support frame 33 and can rotate along the upper inner surface of the support frame 33.

[0034] Motor 31 can be equipped with a 57BYGH112-801A stepper motor, which features high precision and low noise, with a step angle of 1.8°, enabling precise angle control.

[0035] After the optical lens injection mold is opened, motor 31 is started first, which drives the bevel gear set 32 ​​to rotate, thereby driving the transmission shaft 34 to rotate in cooperation with the rotating seat 35. The shaft then drives the demolding mechanism 4 to rotate through the connecting seat 36, making a preliminary adjustment to the position of the demolding mechanism 4 so that it is located directly above the injection mold.

[0036] Please see Figure 3-5 The connecting component 48 includes a movable block 481, the inner surface of which is threadedly connected to the outer surface of the lead screw 46, and the inner surface of the movable block 481 is slidably connected to the outer surfaces of the two slide rails 43. A support plate 482 is fixedly connected to the front end of the movable block 481, and a motor 483 is fixedly connected to the upper end of the support plate 482. A connecting block 484 is fixedly connected to the output end of the motor 483 through a coupling. A rotating seat 485 is fixedly connected to the upper end of the support plate 482, and the inner surface of the rotating seat 485 is rotatably connected to the outer surface of the connecting block 484.

[0037] Motor 3 483 can be a miniature servo motor MSS-0604-30, which is small in size and has high control precision. It can drive the demolding component 49 to adjust the angle through the connecting block 484.

[0038] The demolding assembly 49 includes an L-shaped plate 491. The rear end of the L-shaped plate 491 is fixedly connected to the front end of the connecting block 484. A hydraulic cylinder 492 is fixedly connected to the upper end of the L-shaped plate 491. A negative pressure box 493 is fixedly connected to the output end of the hydraulic cylinder 492. At least one negative pressure pump 494 is fixedly connected to the upper end of the negative pressure box 493. A hose 495 is fixedly connected to the output end of the negative pressure pump 494. The outer surface of the hose 495 is fixedly connected to and communicates with the inner surface of the negative pressure box 493. A plurality of suction cups 496 are fixedly connected to and communicate with the lower end of the negative pressure box 493. Release paper is pasted on the inner surface of the suction cups 496.

[0039] The hydraulic cylinder 492 can be a JEC tie rod type hydraulic cylinder JEC-50-50, with a rated pressure of 16MPa and a stroke of 50mm. After the hydraulic cylinder 492 extends, it can push the negative pressure box 493 and the suction cup 496 to move towards the lens, so that the suction cup 496 can be tightly attached to the surface of the lens. When the hydraulic cylinder 492 retracts, it can pull the lens out of the mold.

[0040] The negative pressure pump 494 can be an EDUR rotary vane vacuum pump GXS1.5, which has a pumping speed of 1.5 m³ / h and an ultimate vacuum of 5 Pa. It can quickly extract air from the negative pressure box 493, so that the suction cup 496 generates negative pressure and firmly adsorbs the optical lens.

[0041] The suction cup 496 can be equipped with the PISCO vacuum suction cup PK-15-S, which is made of silicone rubber, is soft and has strong adsorption force. The release paper pasted on the inner surface can effectively protect the surface of the suction cup 496, prevent dust and other impurities from affecting the adsorption effect, and prevent leaving marks on the lens surface.

[0042] After the demolding mechanism 4 is initially positioned, the second motor 44 is started, which drives the bevel gear set 45 to rotate, thereby driving the lead screw 46 to rotate. Since the moving block 481 is threadedly connected to the lead screw 46 and guided by the slide rail 43, when the lead screw 46 rotates, the connecting component 48 will move linearly along the direction of the lead screw 46, allowing the demolding component 49 to slide downward and enter the injection mold, further approaching the injection-molded lens.

[0043] When the demolding component 49 approaches the lens, the motor 483 starts and drives the demolding component 49 to make a slight angle adjustment through the connecting block 484, so that the demolding component 49 rotates 90° and the suction cup 496 is aligned with the lens. Then the hydraulic cylinder 492 is started, so that the hydraulic cylinder 492 pushes the negative pressure box 493 and the suction cup 496 to move towards the lens surface until the suction cup 496 is tightly attached to the lens surface.

[0044] Once the suction cup 496 is attached to the lens, the negative pressure pump 494 starts and draws air from the negative pressure box 493 through the hose 495, causing the suction cup 496 to generate negative pressure to adsorb the lens. After adsorption is completed, the hydraulic cylinder 492 plays its role again to pull the adsorbed lens out of the mold, completing the demolding.

[0045] Finally, the position of the demolding component 49 is readjusted by motor 3 483 to reset it, so that the suction cup 496 is facing downwards. Then, motor 1 31 drives the demolding mechanism 4 to rotate to the opposite side of the injection mold. Motor 2 44 causes the demolding component 49 to descend, thereby transferring the adsorbed lens to the designated position. Finally, the negative pressure pump 494 is stopped to remove the negative pressure from the suction cup 496, causing the lens to fall off the suction cup 496 and be placed stably, thus completing one demolding operation.

[0046] It should be noted that the motor 31, motor 44, motor 483, negative pressure pump 494, and hydraulic cylinder 492 in this utility model are powered by a power source and controlled by a controller.

[0047] It should be noted that the specific installation methods, circuit connection methods, oil circuit connection methods, and control methods of motor 31, motor 44, motor 3, negative pressure pump 494, and hydraulic cylinder 492 in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0048] Working principle:

[0049] After the optical lens injection mold is opened, the motor 31 in the rotating assembly 3 starts to run. It drives the bevel gear set 32 ​​to rotate through the coupling, which in turn drives the transmission shaft 34 to rotate under the support of the rotating seat 35. This allows the connecting seat 36 located at the upper end of the transmission shaft 34 to drive the demolding mechanism 4 to rotate, completing the initial adjustment of the position of the demolding mechanism 4 so that it can be located directly above the injection mold, laying the foundation for subsequent demolding operations.

[0050] Next, the motor 44 in the demolding mechanism 4 starts and drives the bevel gear set 45 to rotate, thereby driving the lead screw 46 to rotate. When the lead screw 46 rotates, it will drive the moving block 481 to slide down along the outer surface of the two slide rails 43, so that the demolding component 49 can enter the injection mold under the action of the connecting component 48 and get closer to the optical lens to be demolded.

[0051] When the demolding component 49 approaches the lens, the motor 483 in the connecting component 48 starts, and drives the demolding component 49 to adjust its angle through the connecting block 484, so that the suction cup 496 can be accurately aligned with the lens surface. In actual use, the corresponding number of suction cups 496 can be selected according to the production quantity of the mold. Then, the hydraulic cylinder 492 is controlled to extend outward, pushing the negative pressure box 493 and the suction cup 496 to move towards the lens until the suction cup 496 is tightly attached to the lens. At this time, the negative pressure pump 494 is started, allowing the negative pressure pump 494 to draw air out of the negative pressure box 493 through the hose 495, so that its interior is in a negative pressure state, thereby generating negative pressure in the suction cup 496 and firmly adhering to the optical lens.

[0052] After the lens is adsorbed, the hydraulic cylinder 492 actuates again to pull the adsorbed lens out of the mold, completing the demolding process. The motor 3 483 adjusts the angle of the demolding component 49 to reset it, and the motor 2 44 controls the demolding component 49 to rise, taking the lens out of the mold. When the motor 1 31 drives the demolding mechanism 4 to rotate to the opposite side of the injection mold, the motor 2 44 controls the demolding component 49 to descend, transferring the lens to the designated position. Finally, the negative pressure pump 494 stops working, causing the suction cup 496 to lose negative pressure, canceling the adsorption of the lens, and allowing the lens to be placed stably in the designated position, thus completing a complete demolding operation.

[0053] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A high-efficiency demolding auxiliary mechanism for injection molding of optical lenses, comprising a base plate (1), characterized in that: The base plate (1) has multiple connecting holes (2) at its upper end. A rotating assembly (3) is fixedly connected to the upper end of the base plate (1). A demolding mechanism (4) is fixedly connected to the upper end of the rotating assembly (3). The demolding mechanism (4) includes a connecting plate (41). A frame (42) is fixedly connected to the upper end of the connecting plate (41). Slide rails (43) are fixedly connected to the left and right walls of the inner cavity of the frame (42). A second motor (44) is fixedly connected to the upper end of the connecting plate (41). A bevel gear set (45) is fixedly connected to the output end of the second motor (44) through a coupling. A lead screw (46) is fixedly connected to the inner surface of the bevel gear set (45). A rotating seat (47) is rotatably connected to the outer surface of the lead screw (46). The lower end of the rotating seat (47) is fixedly connected to the bottom wall of the inner cavity of the connecting plate (41). A connecting assembly (48) is threadedly connected to the outer surface of the lead screw (46). A demolding assembly (49) is fixedly connected to the front of the connecting assembly (48).

2. The efficient demolding auxiliary mechanism for injection molding of optical lenses according to claim 1, characterized in that: The rotating assembly (3) includes a motor (31) and a support frame (33). The output end of the motor (31) is fixedly connected to a bevel gear set (32) via a coupling. A transmission shaft (34) is fixedly connected to the inner surface of the bevel gear set (32). A rotating seat (35) is rotatably connected to the outer surface of the transmission shaft (34). The lower end of the rotating seat (35) is fixedly connected to the upper end of the base plate (1). A connecting seat (36) is fixedly connected to the upper end of the transmission shaft (34). The outer surface of the connecting seat (36) is in close contact with the upper inner surface of the support frame (33) and can rotate along the upper inner surface of the support frame (33).

3. The efficient demolding auxiliary mechanism for injection molding of optical lenses according to claim 1, characterized in that: The connecting assembly (48) includes a movable block (481), a support plate (482) is fixedly connected to the front end of the movable block (481), a motor (483) is fixedly connected to the upper end of the support plate (482), a connecting block (484) is fixedly connected to the output end of the motor (483) through a coupling, a rotating seat (485) is fixedly connected to the upper end of the support plate (482), and the inner surface of the rotating seat (485) is rotatably connected to the outer surface of the connecting block (484).

4. The efficient demolding auxiliary mechanism for injection molding of optical lenses according to claim 3, characterized in that: The demolding assembly (49) includes an L-shaped plate (491), a hydraulic cylinder (492) is fixedly connected to the upper end of the L-shaped plate (491), a negative pressure box (493) is fixedly connected to the output end of the hydraulic cylinder (492), at least one negative pressure pump (494) is fixedly connected to the upper end of the negative pressure box (493), a hose (495) is fixedly connected to the output end of the negative pressure pump (494), the outer surface of the hose (495) is fixedly connected to and communicates with the inner surface of the negative pressure box (493), and a plurality of suction cups (496) are fixedly connected to and communicates with the lower end of the negative pressure box (493), and release paper is pasted on the inner surface of the suction cups (496).

5. The efficient demolding auxiliary mechanism for injection molding of optical lenses according to claim 4, characterized in that: The rear end of the L-shaped plate (491) is fixedly connected to the front end of the connecting block (484), the inner surface of the moving block (481) is threadedly connected to the outer surface of the lead screw (46), and the inner surface of the moving block (481) is slidably connected to the outer surfaces of the two slide rails (43).

6. The efficient demolding auxiliary mechanism for injection molding of optical lenses according to claim 2, characterized in that: The lower end of the connecting plate (41) is fixedly connected to the upper end of the connecting seat (36), the lower end of the motor (31) is fixedly connected to the upper end of the base plate (1), and the lower end of the support frame (33) is fixedly connected to the upper end of the base plate (1).

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