Ejection device for a sensor lens injection mold

Abstract

The utility model provides a kind of ejector device of sensor lens injection mold, it is related to injection mold field, the ejector device of this sensor lens injection mold includes upper mould, the top of upper mould is equipped with injection port, the bottom of upper mould is provided with lower mould, the top of lower mould is provided with ejector assembly, the ejector device of this sensor lens injection mold, when upper mould drives sealing block and model block top close adhesion in injection process, pass through the linkage buffer structure of design, sealing block promotes fixed block, and then drive moving rod, support rod make slider move along guide rod, extrude buffer spring shrink, this process realizes effective buffer effect, can avoid sealing block and model block excessive extrusion, prevent mold damage due to extrusion strength too big, prolong the service life of mold, reduce the frequency of repair cost and replacement mold in production process, guarantee the stability and continuity of injection molding production.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an ejection device for a sensor lens injection mold. Background Technology

[0002] Injection molds are key equipment in plastic molding and processing. They are used to inject molten plastic at high temperatures into a closed mold cavity, and after cooling and solidification, the product is obtained by demolding. They consist of a moving mold and a fixed mold, forming a closed system. The structure of runners, gates, etc. are designed to adapt to the different properties of plastics to ensure uniform material filling. The mold material must have high hardness, wear resistance, and corrosion resistance. It is commonly made of alloy steel or pre-hardened steel and is widely used in the automotive, electronics, and daily necessities industries. It can efficiently produce parts with complex shapes and precise dimensions and is an important foundation for modern industrial mass production.

[0003] However, in the existing technology, the ejection device of a traditional sensor lens injection mold usually uses an ejector rod. When ejecting a thin-walled, easily deformable, or surface-required sensor lens, it may cause local stress concentration and lens deformation. Therefore, we need an ejection device for a sensor lens injection mold. Summary of the Invention

[0004] (a) Technical problems to be solved The purpose of this invention is to provide an ejection device for a sensor lens injection mold to solve the above-mentioned problems, thereby addressing the issue of localized stress concentration that may occur when ejecting thin-walled, easily deformable sensor lenses in the prior art.

[0005] (II) Technical Solution This utility model is achieved through the following technical solution: An ejection device for a sensor lens injection mold includes an upper mold, a sprue opening at the top of the upper mold, a lower mold at the bottom of the upper mold, an ejection assembly at the top of the lower mold, a buffer assembly at the bottom of the upper mold, a sealing block at the bottom of the buffer assembly, and a pressing block fixedly connected to the bottom of the sealing block. The ejection assembly includes a cylindrical sleeve, and a support spring is fixedly connected inside the cylindrical sleeve. A support column is fixedly connected to one end of the support spring. A movable plate is fixedly connected to the top of the support column. A connecting column is fixedly connected to the top of the movable plate. A push rod is fixedly connected to the top of the movable plate. A top ring is fixedly connected to the top of the movable plate. A mold block is provided at the top of the lower mold.

[0006] Preferably, the cylindrical sleeve forms an elastic structure with the support column through a support spring, and one end of the support spring is fixedly connected to the inside of the cylindrical sleeve, and the other end of the support spring is fixedly connected to one end of the support column.

[0007] Preferably, the connecting column forms a movable structure with the supporting column through a movable plate, and the top of the movable plate is fixedly connected to the bottom of the connecting column, and the bottom of the movable plate is fixedly connected to the top of the supporting column.

[0008] Preferably, the lower mold forms a limiting structure with the support column through a cylindrical sleeve, and the inner diameter of the cylindrical sleeve matches the outer diameter of the support column, and the inner wall of the cylindrical sleeve fits against the outer wall of the support column.

[0009] Preferably, the buffer assembly includes a buffer shell, which is disposed at the bottom of the upper mold. An injection tube is disposed inside the buffer shell. A guide rod is fixedly connected to the inner wall of the buffer shell. A buffer spring is sleeved on the outer wall of the guide rod. A slider is fixedly connected to one end of the buffer spring. A support rod is hinged to the top of the slider. A moving rod is hinged to one end of the support rod. A fixed block is hinged to one end of the moving rod, and the other end of the moving rod is hinged to the inner wall of the buffer shell.

[0010] Preferably, the buffer spring forms a support structure through a slider and a support rod, with one side of the slider fixedly connected to one end of the buffer spring, and the top of the slider hinged to one end of the support rod.

[0011] Preferably, the buffer spring is disposed in the middle of the two sliders, and the two ends of the buffer spring are fixedly connected to one side of the two sliders respectively.

[0012] Preferably, the fixed block forms a movable structure with the support rod via a movable rod, and one end of the movable rod is hinged to the inner wall of the fixed block, and the outer wall of the movable rod is hinged to one end of the support rod.

[0013] This utility model provides an ejection device for a sensor lens injection mold, which has the following beneficial effects: 1. During the injection molding process, when the upper mold drives the sealing block to fit tightly against the top of the model block, the designed linkage buffer structure causes the sealing block to push the fixed block, which in turn drives the moving rod and support rod to move the slider along the guide rod, compressing the buffer spring to contract. This process achieves an effective buffering effect, which can prevent the sealing block and the model block from being excessively compressed, prevent mold damage caused by excessive compression force, extend the service life of the mold, reduce maintenance costs and the frequency of mold replacement during the production process, and ensure the stability and continuity of injection molding production.

[0014] 2. During injection molding, the sealing block drives the extrusion block, which is then transmitted sequentially through the connecting column, moving plate, and support column. This causes the support spring to contract and store energy. When the mold opens, the support spring releases energy, pushing the support column and moving plate to move. This, in turn, drives the ejector pins and ejector rings around the mold to push the molded product upwards synchronously. The design of the ejector ring increases the contact area with the product, which can evenly distribute the ejection force and effectively avoid deformation of precision products such as lenses due to local stress concentration, thus ensuring the molding quality of the product. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the supporting spring and supporting column structure of this utility model; Figure 3 This is a schematic diagram of the movable plate and top ring structure of this utility model; Figure 4 This is a schematic diagram of the slider and support rod structure of this utility model.

[0016] 1. Upper mold; 2. Injection port; 3. Lower mold; 4. Ejection assembly; 5. Buffer assembly; 6. Sealing block; 7. Extrusion block; 401. Cylindrical sleeve; 402. Support spring; 403. Support column; 404. Moving plate; 405. Connecting column; 406. Ejector rod; 407. Top ring; 408. Model block; 501. Buffer shell; 502. Injection tube; 503. Guide rod; 504. Buffer spring; 505. Slider; 506. Support rod; 507. Moving rod; 508. Fixing block. Detailed Implementation

[0017] This utility model embodiment provides an ejection device for a sensor lens injection mold.

[0018] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The system includes an upper mold 1, with an injection port 2 at its top, a lower mold 3 at its bottom, an ejector assembly 4 at its top, a buffer assembly 5 at its bottom, a sealing block 6 at its bottom, and a pressing block 7 fixedly connected to the bottom of the sealing block 6. The ejector assembly 4 includes a cylindrical sleeve 401, with a support spring 402 fixedly connected inside the sleeve 401. One end of the support spring 402 is fixedly connected to a support column 403, a moving plate 404 is fixedly connected to the top of the support column 403, a connecting column 405 is fixedly connected to the top of the moving plate 404, a push rod 406 is fixedly connected to the top of the moving plate 404, and a top ring 407 is fixedly connected to the top of the moving plate 404. A model block 408 is located at the top of the lower mold 3. Simultaneously, as the sealing block 6 moves, it drives the extrusion block 7 to move downwards, causing the extrusion block 7 to push the connecting column 405 to move. The connecting column 405 then pushes the moving plate 404 to move, causing the moving plate 404 to push the support column 403 to move along the inner wall of the cylindrical sleeve 401. This causes the support column 403 to compress the support spring 402 and shrink it. After injection molding, the upper mold 1 moves upwards, driving the sealing block 6 to move. The sealing block 6 then drives the extrusion block 7 to move. At this time, the support spring 402 loses pressure, causing it to push the support column 403 to move. The support column 403 then pushes the moving plate 404 to move, causing the moving plate 404 to simultaneously drive the surrounding ejector rods 406 and the top ring 407 to move upwards, ejecting the molded product and increasing the contact area with the product. This effectively prevents lens deformation due to localized stress concentration.

[0019] For further information, please refer to the following: Figure 2 The cylindrical sleeve 401 forms an elastic structure with the support column 403 through the support spring 402. One end of the support spring 402 is fixedly connected to the inside of the cylindrical sleeve 401, and the other end of the support spring 402 is fixedly connected to one end of the support column 403. With the support spring 402, the support spring 402 can support the support column 403 with the support of the cylindrical sleeve 401, thereby improving the support effect of the cylindrical sleeve 401 on the support column 403.

[0020] For further information, please refer to the following: Figure 2 and Figure 3 The connecting column 405 forms a movable structure with the supporting column 403 through the movable plate 404, and the top of the movable plate 404 is fixedly connected to the bottom of the connecting column 405, and the bottom of the movable plate 404 is fixedly connected to the top of the supporting column 403, so that when the connecting column 405 moves the movable plate 404, the movable plate 404 moves the supporting column 403.

[0021] For further information, please refer to the following: Figure 2The lower mold 3 forms a limiting structure with the cylindrical sleeve 401 and the support column 403. The inner diameter of the cylindrical sleeve 401 matches the outer diameter of the support column 403, and the inner wall of the cylindrical sleeve 401 fits against the outer wall of the support column 403. This allows the support column 403 to move along the inner wall of the cylindrical sleeve 401, improving the movement stability of the support column 403.

[0022] Example 2, please refer to again. Figure 1 and Figure 4 The buffer assembly 5 includes a buffer shell 501, which is located at the bottom of the upper mold 1. An injection tube 502 is installed inside the buffer shell 501. A guide rod 503 is fixedly connected to the inner wall of the buffer shell 501. A buffer spring 504 is sleeved on the outer wall of the guide rod 503. A slider 505 is fixedly connected to one end of the buffer spring 504. A support rod 506 is hinged to the top of the slider 505. A moving rod 507 is hinged to one end of the support rod 506. A fixed block 508 is hinged to one end of the moving rod 507, and the other end of the moving rod 507 is connected to... The inner wall of the buffer shell 501 is hinged. During injection molding, the upper mold 1 drives the sealing block 6 to move downward, so that the sealing block 6 is tightly attached to the top of the model block 408. When attached, the sealing block 6 moves upward and pushes the fixed block 508 to move, so that the fixed block 508 pushes the moving rod 507 to move, so that the moving rod 507 pushes the support rod 506 to move, and the support rod 506 pushes the slider 505 to move along the outer wall of the guide rod 503, so that the slider 505 squeezes the buffer spring 504 to contract and complete the buffering, avoiding excessive compression with the model block 408 and damage.

[0023] For further information, please refer to the following: Figure 4 The buffer spring 504 forms a support structure with the slider 505 and the support rod 506. One side of the slider 505 is fixedly connected to one end of the buffer spring 504, and the top of the slider 505 is hinged to one end of the support rod 506. This allows the slider 505 to support the support rod 506 when the buffer spring 504 provides elastic support.

[0024] Example 3, please refer to again. Figure 4 The buffer spring 504 is located in the middle of the two sliders 505, and the two ends of the buffer spring 504 are fixedly connected to one side of the two sliders 505 respectively. This allows the sliders 505 to compress the buffer spring 504 when they move, thus improving the buffering effect.

[0025] For further information, please refer to the following: Figure 4The fixed block 508 forms a movable structure with the support rod 506 via the movable rod 507. One end of the movable rod 507 is hinged to the inner wall of the fixed block 508, and the outer wall of the movable rod 507 is hinged to one end of the support rod 506. This allows the fixed block 508 to move the movable rod 507, which in turn pushes the support rod 506 to move.

[0026] When using this utility model: Working principle: During injection molding, the upper mold 1 moves the sealing block 6 downward, causing it to fit tightly against the top of the mold block 408. During this contact, the sealing block 6 moves upward, pushing the fixing block 508 to move. This, in turn, pushes the moving rod 507, which in turn pushes the support rod 506. The support rod 506 then pushes the slider 505 along the outer wall of the guide rod 503, causing the slider 505 to compress the buffer spring 504, thus preventing excessive compression and damage to the mold block 408. Simultaneously, the movement of the sealing block 6 causes the extrusion block 7 to move downward, pushing the connecting column 405 to move. The moving plate 404 is pushed to move, causing the moving plate 404 to push the support column 403 to move along the inner wall of the cylindrical sleeve 401. This causes the support column 403 to compress the support spring 402 and shrink it. After injection molding, the upper mold 1 moves upward, driving the sealing block 6 to move. The sealing block 6 drives the extrusion block 7 to move. At this time, the support spring 402 loses pressure, causing the support spring 402 to push the support column 403 to move. The support column 403 pushes the moving plate 404 to move, which in turn causes the moving plate 404 to simultaneously drive the surrounding ejector rods 406 and the top ring 407 to move upward, ejecting the molded product and increasing the contact area with the product. This effectively prevents the lens from deforming due to local stress concentration.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An ejection device for a sensor lens injection mold, comprising an upper mold (1), characterized in that: The upper mold (1) has an injection port (2) at its top, and a lower mold (3) is provided at the bottom of the upper mold (1). An ejection assembly (4) is provided at the top of the lower mold (3), and a buffer assembly (5) is provided at the bottom of the upper mold (1). A sealing block (6) is provided at the bottom of the buffer assembly (5), and a pressing block (7) is fixedly connected to the bottom of the sealing block (6). The ejection assembly (4) includes a cylindrical sleeve (401), and the interior of the cylindrical sleeve (401) is fixedly connected to... A support spring (402) is connected to one end of the support spring (402), a support column (403) is fixedly connected to one end of the support spring (402), a moving plate (404) is fixedly connected to the top of the support column (403), a connecting column (405) is fixedly connected to the top of the moving plate (404), a top rod (406) is fixedly connected to the top of the moving plate (404), a top ring (407) is fixedly connected to the top of the moving plate (404), and a model block (408) is provided on the top of the lower mold (3).

2. The ejection device for a sensor lens injection mold according to claim 1, characterized in that: The cylindrical sleeve (401) forms an elastic structure with the support column (403) through the support spring (402), and one end of the support spring (402) is fixedly connected to the inside of the cylindrical sleeve (401), and the other end of the support spring (402) is fixedly connected to one end of the support column (403).

3. The ejection device for a sensor lens injection mold according to claim 1, characterized in that: The connecting column (405) forms a movable structure with the supporting column (403) through the movable plate (404), and the top of the movable plate (404) is fixedly connected to the bottom of the connecting column (405), and the bottom of the movable plate (404) is fixedly connected to the top of the supporting column (403).

4. The ejection device for a sensor lens injection mold according to claim 1, characterized in that: The lower mold (3) forms a limiting structure with the support column (403) through the cylindrical sleeve (401), and the inner diameter of the cylindrical sleeve (401) matches the outer diameter of the support column (403), and the inner wall of the cylindrical sleeve (401) fits against the outer wall of the support column (403).

5. The ejection device for a sensor lens injection mold according to claim 1, characterized in that: The buffer assembly (5) includes a buffer shell (501), which is located at the bottom of the upper mold (1). An injection tube (502) is provided inside the buffer shell (501). A guide rod (503) is fixedly connected to the inner wall of the buffer shell (501). A buffer spring (504) is sleeved on the outer wall of the guide rod (503). A slider (505) is fixedly connected to one end of the buffer spring (504). A support rod (506) is hinged to the top of the slider (505). A moving rod (507) is hinged to one end of the support rod (506). A fixing block (508) is hinged to one end of the moving rod (507), and the other end of the moving rod (507) is hinged to the inner wall of the buffer shell (501).

6. The ejection device for a sensor lens injection mold according to claim 5, characterized in that: The buffer spring (504) forms a support structure through the slider (505) and the support rod (506), and one side of the slider (505) is fixedly connected to one end of the buffer spring (504), and the top of the slider (505) is hinged to one end of the support rod (506).

7. The ejection device for a sensor lens injection mold according to claim 5, characterized in that: The buffer spring (504) is located in the middle of the two sliders (505), and the two ends of the buffer spring (504) are fixedly connected to one side of the two sliders (505) respectively.

8. The ejection device for a sensor lens injection mold according to claim 5, characterized in that: The fixed block (508) forms a movable structure with the support rod (506) via the movable rod (507), and one end of the movable rod (507) is hinged to the inner wall of the fixed block (508), and the outer wall of the movable rod (507) is hinged to one end of the support rod (506).

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