Inner tooth demolding structure of lens cone forming mold

Abstract

The utility model discloses an internal tooth demoulding structure of a lens cone forming mould, which comprises a front mould main body and a rear mould main body, the front mould main body is provided with a front mould core, the rear mould main body is provided with a rear mould core, and a cavity for forming a lens cone is formed when the front mould core and the rear mould core are closed. The rear mold body is provided with a tooth shaft extending into the cavity, a rotating rod coaxial with the tooth shaft and a driving assembly driving the rotating rod to rotate, the tooth shaft and the rotating rod are arranged in a split mode, the end, close to the rotating rod, of the tooth shaft is provided with a first connecting part, and the end, close to the tooth shaft, of the rotating rod is provided with a second connecting part. The rotating rod drives the tooth shaft to rotate through the matching of the first connecting part and the second connecting part, and an elastic plate which enables the tooth shaft to always have a trend of moving towards one side of the rotating rod is arranged in the rear mold main body. According to the utility model, the internal teeth can be demoulded without damage, the moving speed of the tooth shaft does not need to be accurately controlled, the structure of the mould is simplified, the smoothness of the internal teeth of the lens cone is improved, and the forming quality of the lens cone is improved.

Description

Technical Field

[0001] This utility model relates to the field of lens barrel forming mold technology, specifically to an internal tooth demolding structure for a lens barrel forming mold. Background Technology

[0002] In recent years, as people's demands for mobile phone pixels have increased, the requirements for the injection molding quality of lens barrels have also increased. Lens barrels typically use a toothed shaft to form the inner teeth during molding. The toothed shaft is rotatably mounted on a corresponding template. After molding, a rotary drive mechanism controls the rotation of the toothed shaft, and under the drive of a mold opening drive mechanism, the template moves the toothed shaft out of the cavity, thus achieving demolding of the inner teeth. This demolding method requires precise control of the toothed shaft's movement speed; otherwise, the toothed shaft may cause damage to the inner teeth, affecting the smoothness of the inner teeth and the overall molding quality of the lens barrel. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing an inner tooth demolding structure for a lens barrel forming mold. The structure is simple, avoids damage to the inner tooth caused by the tooth axis, and improves the forming quality of the inner tooth of the lens barrel.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An internal tooth demolding structure for a lens barrel forming mold includes a front mold body and a rear mold body. The front mold body is provided with a front mold core, and the rear mold body is provided with a rear mold core. When the front mold core and the rear mold core are closed, they form a cavity for forming the lens barrel. The rear mold body is provided with a toothed shaft extending into the cavity, a rotating rod coaxially arranged with the toothed shaft, and a drive assembly for driving the rotating rod to rotate. The toothed shaft and the rotating rod are separate. The end of the toothed shaft near the rotating rod is provided with a first connecting part, and the end of the rotating rod near the toothed shaft is provided with a second connecting part. The rotating rod drives the toothed shaft to rotate through the cooperation of the first connecting part and the second connecting part. The rear mold body is provided with a spring plate that makes the toothed shaft always tend to move towards the rotating rod. By employing a separate tooth shaft and rotating rod, and a spring plate within the rear mold body that ensures the tooth shaft always tends to move towards the rotating rod, the threaded portion of the tooth shaft can be moved out of the cavity by the spring force of the spring plate while the rotating rod drives the tooth shaft to rotate during mold opening. This achieves damage-free demolding of the internal teeth, eliminates the need for precise control of the tooth shaft's movement speed, simplifies the mold structure, improves the smoothness of the internal teeth of the lens barrel, and enhances the molding quality of the lens barrel.

[0006] As a preferred technical solution, the spring plate is provided with a through hole for the tooth shaft to pass through. A convex ring is provided on the periphery of the end of the tooth shaft near the rotating rod. A receiving groove corresponding to the convex ring is provided at one end of the through hole. An annular pushing step is formed between the receiving groove and the through hole. During assembly, the end of the tooth shaft away from the first connecting part passes through the through hole, the convex ring is embedded in the receiving groove, and the pushing step abuts against the convex ring.

[0007] As a preferred technical solution, the first connecting part is a connecting hole located on the end face of the tooth shaft, and the second connecting part is a connecting post adapted to the connecting hole. Both the connecting hole and the connecting post have non-circular cross-sections, allowing the connecting post to be movably inserted into the connecting hole during assembly. By employing a connecting hole and connecting post with non-circular cross-sections, the rotating rod can both drive the tooth shaft to rotate and move relative to the tooth shaft in the axial direction.

[0008] As a preferred technical solution, the front mold body sequentially includes a front side plate and a front template, the front template being provided with a front mold core; the rear mold body sequentially includes a rear template, an ejector pin mounting plate and a rear side plate, the rear template being provided with a rear mold core.

[0009] As a preferred technical solution, the rear mold core is provided with a bushing adapted to the tooth shaft, and the tooth shaft is movably inserted into the bushing.

[0010] As a preferred technical solution, the spring plate is located at one end of the rear mold plate near the ejector pin mounting plate, and a first return spring is provided between the rear mold core and the spring plate to ensure that the spring plate always tends to move towards the rotating rod side.

[0011] As a preferred technical solution, the surface of the spring plate is provided with a first spring positioning hole for positioning the first reset spring.

[0012] As a preferred technical solution, the driving component is disposed between the ejector mounting plate and the rear side plate, the rotating rod is drivenly connected to the output end of the driving component, and a second return spring is provided between the rear template and the ejector mounting plate to make the rotating rod tend to move away from the tooth axis when the mold is opened.

[0013] As a preferred technical solution, the rear template has a second spring positioning hole on the side facing the ejector pin mounting plate for positioning the second reset spring.

[0014] As a preferred technical solution, the drive assembly includes a reduction gear set and a motor that drives the reduction gear set.

[0015] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, by adopting a separate tooth shaft and rotating rod, and setting a spring plate in the rear mold body so that the tooth shaft always tends to move towards the rotating rod, the threaded part of the tooth shaft can be moved out of the cavity by the elastic force of the spring plate while the rotating rod drives the tooth shaft to rotate during mold opening. This achieves demolding of the internal teeth without damage, eliminates the need for precise control of the tooth shaft's movement speed, simplifies the mold structure, improves the smoothness of the internal teeth of the lens barrel, and improves the molding quality of the lens barrel.

[0016] To more clearly illustrate the structural features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments: Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the mold closing state according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the mold opening state according to an embodiment of the present utility model;

[0019] Figure 3 This is an exploded structural diagram of the rear mold body according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the assembly structure of the toothed shaft and the rotating rod according to an embodiment of the present utility model;

[0021] Figure 5 This is an exploded structural diagram of the toothed shaft and rotating rod according to an embodiment of the present invention;

[0022] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0023] Figure 7 This is a cross-sectional schematic diagram of the rear mold body according to an embodiment of the present utility model;

[0024] Figure 8 yes Figure 7 Enlarged diagram of point B in the middle.

[0025] Explanation of reference numerals in the attached diagram:

[0026] 10. Front mold body; 11. Front side plate; 12. Front template.

[0027] 20. Rear mold body; 21. Rear template; 22. Ejector pin mounting plate

[0028] 23. Rear side plate; 24. Rear mold core; 25. Spring plate

[0029] 251. Through hole; 252. Push step; 253. First spring positioning hole

[0030] 26. Bushing; 27. First return spring; 28. Second return spring

[0031] 30. Tooth shaft; 31. Threaded part; 32. First connecting part

[0032] 33. Convex ring 40. Rotating rod 41. Second connecting part

[0033] 50. Driver components. Detailed Implementation

[0034] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of 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.

[0036] like Figure 1-8 As shown, the present invention discloses an internal tooth demolding structure for a lens barrel forming mold, comprising a front mold body 10 and a rear mold body 20. The front mold body 10 sequentially includes a front side plate 11 and a front template 12, the front template 12 being provided with a front mold core (not shown). The rear mold body 20 sequentially includes a rear template 21, an ejector pin mounting plate 22, and a rear side plate 23, the rear template 21 being provided with a rear mold core 24. When the front mold core and the rear mold core 24 are closed, they form a cavity for forming the lens barrel. The rear mold body 20 is provided with teeth extending into the cavity. The tooth shaft 30, the rotating rod 40 coaxially arranged with the tooth shaft 30, and the driving assembly 50 for driving the rotating rod 40 to rotate are provided. The tooth shaft 30 and the rotating rod 40 are separately arranged. The tooth shaft 30 is provided with a first connecting part 32 at one end near the rotating rod 40, and the rotating rod 40 is provided with a second connecting part 41 at one end near the tooth shaft 30. The rotating rod 40 drives the tooth shaft 30 to rotate through the cooperation of the first connecting part 32 and the second connecting part 41. The rear mold body 20 is provided with a spring plate 25 that makes the tooth shaft 30 always tend to move towards the rotating rod 40. By employing a separate tooth shaft 30 and a rotating rod 40, and by providing a spring plate 25 within the rear mold body 20 that ensures the tooth shaft 30 always tends to move towards the rotating rod 40, the threaded portion 31 of the tooth shaft 30 can be moved out of the cavity by the elastic force of the spring plate 25 while the rotating rod 40 drives the tooth shaft 30 to rotate. This achieves demolding of the internal teeth without damage, eliminates the need for precise control of the tooth shaft 30's movement speed, simplifies the mold structure, improves the smoothness of the internal teeth of the lens barrel, and enhances the molding quality of the lens barrel.

[0037] In this embodiment, the rear mold core 24 is provided with a bushing 26 adapted to the tooth shaft 30. The tooth shaft 30 is movably inserted into the bushing 26. The spring plate 25 is provided at one end of the rear mold plate 21 near the ejector mounting plate 22. A first return spring 27 is provided between the rear mold core 24 and the spring plate 25, so that the spring plate 25 always has a tendency to move towards the rotating rod 40. The spring plate 25 is provided with a through hole 251 for the tooth shaft 30 to pass through. A protruding ring 33 is provided on the periphery of the end of the tooth shaft 30 near the rotating rod 40. One end of the through hole 251 is provided with a receiving groove corresponding to the protruding ring 33. An annular pushing step 252 is formed between the receiving groove and the through hole 251. During assembly, the end of the tooth shaft 30 away from the first connecting part 32 passes through the through hole 251, the protruding ring 33 is embedded in the receiving groove, and the pushing step 252 abuts against the protruding ring 33. To facilitate the installation of the first return spring 27, the surface of the spring plate 25 is provided with a first spring positioning hole 253 for positioning the first return spring 27.

[0038] In this invention, the driving assembly 50 is disposed between the ejector mounting plate 22 and the rear side plate 23. The rotating rod 40 is drivenly connected to the output end of the driving assembly 50. A second return spring 28 is provided between the rear template 21 and the ejector mounting plate 22, causing the rotating rod 40 to tend to move away from the tooth axis 30 when the mold is opened. To facilitate the installation of the second return spring 28, a second spring positioning hole (not shown) is provided on the side of the rear template 21 facing the ejector mounting plate 22 for positioning the second return spring 28. In this invention, the driving assembly 50 includes a reduction gear set and a motor that drives the reduction gear set. The specific structure of the reduction gear set is a conventional setting that can be easily conceived by those skilled in the art based on their needs, and will not be described in detail here.

[0039] In this embodiment, the first connecting part 32 is a connecting hole located on the end face of the tooth shaft 30, and the second connecting part 41 is a connecting post adapted to the connecting hole. Both the connecting hole and the connecting post have square cross-sections, allowing the connecting post to be movably inserted into the connecting hole during assembly. By using a square-cross-section connecting hole and connecting post, the rotating rod 40 can both drive the tooth shaft 30 to rotate and move relative to the tooth shaft 30 along the axial direction. It should be understood that in actual use, the cross-sections of the connecting hole and the connecting post can also be set to other non-circular shapes, the main purpose of which is to enable the rotating rod 40 to drive the tooth shaft 30 to rotate while ensuring that the tooth shaft 30 and the rotating rod 40 can move relative to each other along the axial direction. It should also be noted that the positions of the connecting post and the connecting hole can be interchanged, i.e., the connecting post can be located on the tooth shaft 30, and the connecting hole on the rotating rod 40.

[0040] When the mold of this utility model is opened, the front mold body 10 and the rear mold body 20 are separated under external drive. The rear template 21 and the ejector pin mounting plate are separated by a certain distance under the action of the second return spring 28, so that the connecting post moves a certain distance in the direction of disengaging from the connecting hole, so that the tooth shaft 30 has space to move in the direction of the rotating rod 40. When the connecting post has not completely left the connecting hole, the drive assembly 50 drives the tooth shaft 30 to rotate through the rotating rod 40. At the same time, the tooth shaft 30 moves away from the cavity under the action of the spring plate 25, thereby realizing the demolding of the internal tooth.

[0041] In summary, this invention employs a separate tooth shaft and rotating rod, along with a spring plate within the rear mold body that ensures the tooth shaft always tends to move towards the rotating rod. This allows the threaded portion of the tooth shaft to be moved out of the cavity by the spring plate during mold opening, while the rotating rod drives the tooth shaft to rotate. This achieves damage-free demolding of the internal teeth, eliminates the need for precise control of the tooth shaft's movement speed, simplifies the mold structure, improves the smoothness of the internal teeth of the lens barrel, and enhances the molding quality of the lens barrel.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the actual technical aspects of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An internal tooth demolding structure for a lens barrel forming mold, comprising a front mold body and a rear mold body, wherein the front mold body is provided with a front mold core, and the rear mold body is provided with a rear mold core, wherein the front mold core and the rear mold core form a cavity for forming a lens barrel when the mold is closed, characterized in that, The rear mold body is provided with a toothed shaft extending into the cavity, a rotating rod coaxially arranged with the toothed shaft, and a drive assembly for driving the rotating rod to rotate. The toothed shaft and the rotating rod are separate. The end of the toothed shaft near the rotating rod is provided with a first connecting part, and the end of the rotating rod near the toothed shaft is provided with a second connecting part. The rotating rod drives the toothed shaft to rotate through the cooperation of the first connecting part and the second connecting part. The rear mold body is provided with a spring plate that makes the toothed shaft always tend to move towards the rotating rod.

2. The internal tooth demolding structure of the lens barrel forming mold according to claim 1, characterized in that, The spring plate has a through hole for the tooth shaft to pass through. The tooth shaft has a convex ring on its periphery near the end of the rotating rod. One end of the through hole has a receiving groove corresponding to the convex ring. An annular pushing step is formed between the receiving groove and the through hole. During assembly, the end of the tooth shaft away from the first connecting part passes through the through hole, the convex ring is embedded in the receiving groove, and the pushing step abuts against the convex ring.

3. The internal tooth demolding structure of the lens barrel forming mold according to claim 1, characterized in that, The first connecting part is a connecting hole provided on the end face of the tooth shaft, and the second connecting part is a connecting post adapted to the connecting hole. The cross-sections of the connecting hole and the connecting post are both non-circular. During assembly, the connecting post can be movably inserted into the connecting hole.

4. The internal tooth demolding structure of the lens barrel forming mold according to claim 1, characterized in that, The front mold body includes a front side plate and a front template in sequence, and the front template is provided with a front mold core. The rear mold body includes a rear template, an ejector pin mounting plate and a rear side plate in sequence, and the rear template is provided with a rear mold core.

5. The internal tooth demolding structure of the lens barrel forming mold according to claim 4, characterized in that, The rear mold core is provided with a bushing adapted to the tooth shaft, and the tooth shaft is movably inserted into the bushing.

6. The internal tooth demolding structure of the lens barrel forming mold according to claim 4, characterized in that, The spring plate is located at one end of the rear mold plate near the ejector pin mounting plate, and a first return spring is provided between the rear mold core and the spring plate to make the spring plate always tend to move towards the rotating rod side.

7. The internal tooth demolding structure of the lens barrel forming mold according to claim 6, characterized in that, The surface of the spring plate is provided with a first spring positioning hole for positioning the first reset spring.

8. The internal tooth demolding structure of the lens barrel forming mold according to claim 4, characterized in that, The drive assembly is located between the ejector plate and the rear side plate. The rotating rod is driven and connected to the output end of the drive assembly. A second return spring is provided between the rear template and the ejector plate, which causes the rotating rod to move away from the tooth axis when the mold is opened.

9. The internal tooth demolding structure of the lens barrel forming mold according to claim 8, characterized in that, The rear template has a second spring positioning hole on the side facing the ejector pin mounting plate for positioning the second reset spring.

10. The internal tooth demolding structure of the lens barrel forming mold according to claim 8, characterized in that, The drive assembly includes a reduction gear set and a motor that drives the reduction gear set.

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