Lens barrel injection mold

Abstract

The utility model discloses a lens cone injection mold, which comprises a template assembly and a dental plate assembly arranged on the template assembly, the dental plate assembly comprises a plurality of dental plates arranged side by side, a molding cavity is arranged in each dental plate, and a convex part is arranged on a molding surface corresponding to the molding cavity of each dental plate; the protruding part is arranged in the horizontal circumferential direction of the forming face of the forming cavity. According to the utility model, the structure of the dental plate in the injection mold is changed, the lug boss is arranged on the dental plate at the position corresponding to the larger and deeper glue thickness of the lens cone, and the channel penetrates through the runner on the lug boss to draw out the glue on the side wall of the lens cone. That is to say, the lug bosses are arranged at the corresponding positions on the dental plate, so that a product prepared by the lens cone injection mold is equivalent to corresponding glue drawing on the side wall of the lens cone, and the thickness of each part of the lens cone is ensured to be uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding equipment, in particular to a lens barrel injection mold. Background Art

[0002] As is well known, in the manufacturing of optical instruments, especially in the production process of lens barrels, it is crucial to ensure the uniform wall thickness of the lens barrels. When the wall thickness of the lens barrel is uneven, it is necessary to remove the glue at the place where the glue thickness of the lens barrel is larger. In the prior art, a mold insert with a corresponding length can be designed to remove the glue.

[0003] However, through research by the inventor, it is found that since some places with a larger glue thickness of the lens barrel are located deep inside the lens barrel, when removing the glue at the place where the glue thickness of the lens barrel is large and the depth is deep through the mold insert, it is restricted by the mold insert (that is, the mold insert is prone to breakage). Therefore, it is impossible to effectively remove the glue at the place where the glue thickness of the lens barrel is large and deep inside the lens barrel, resulting in uneven wall thickness of the prepared lens barrel. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: to provide a lens barrel injection mold to solve the problem that the wall thickness of the lens barrel prepared by the existing lens barrel injection mold is not uniform enough.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a lens barrel injection mold, which includes a template assembly and a jaw plate assembly arranged on the template assembly. The jaw plate assembly includes a plurality of jaw plates arranged side by side. A molding cavity is arranged inside the jaw plate, and a convex portion is further arranged on the molding surface corresponding to the molding cavity of the jaw plate; wherein, the convex portion is arranged horizontally circumferentially along the molding surface of the molding cavity.

[0006] Further, in the lens barrel injection mold of the utility model, a thread is further included. The thread is arranged on the molding surface and is arranged horizontally circumferentially along the molding surface of the molding cavity.

[0007] Further, in the lens barrel injection mold of the utility model, there is a certain distance between the thread and the convex portion in the vertical height direction of the jaw plate.

[0008] Further, in the lens barrel injection mold of the utility model, it includes four jaw plates, and the four jaw plates are arranged side by side on the template assembly.

[0009] Further, in the lens barrel injection mold of the utility model, the jaw plate includes two sub-jaw plates connected to each other. A semi-cylindrical groove is formed on the sub-jaw plate. Among them, the two sub-jaw plates are arranged oppositely so that the two grooves enclose to form a cylindrical molding cavity extending in the vertical height direction.

[0010] Further, in the lens barrel injection mold of the present utility model, a runner is further provided on the ejector plate, and the runner is communicated with the molding cavity.

[0011] Further, in the lens barrel injection mold of the present utility model, the runner extends along the horizontal width direction of the ejector plate, and the molding cavity extends along the vertical height direction of the ejector plate.

[0012] Further, in the lens barrel injection mold of the present utility model, the cross-sectional shape of the protruding portion in the direction perpendicular to its circumferential direction is trapezoidal.

[0013] Further, in the lens barrel injection mold of the present utility model, a stop portion is further provided on the ejector plate, and the stop portion is arranged at one end of the ejector plate away from the protruding portion.

[0014] Further, in the lens barrel injection mold of the present utility model, a feed inlet is further included, and the feed inlet is arranged on the template assembly.

[0015] The beneficial effect of the present utility model lies in that by changing the structure of the ejector plate in the injection mold, a protruding portion is provided at a position on the ejector plate corresponding to the position where the lens barrel has a relatively large glue thickness and a relatively deep depth. Providing a protruding portion on the ejector plate can make the prepared product have corresponding recessed portions (as shown in D in Figure 8 ), that is, through the ejector plate provided by the present utility model, it can be realized that the prepared product is equivalent to scooping out the glue on the side wall of the lens barrel, making the glue thickness ratio of each part close to average, completing the scooping out of the glue of the product, and ensuring that the thickness of each part of the lens barrel is uniform. That is, without affecting the normal use of the lens barrel, the position that the mold insert cannot reach is scooped out by another method to ensure that the thickness of each part of the lens barrel is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the lens barrel injection mold of the present utility model from a certain perspective in an embodiment;

[0017] Figure 2 is a schematic structural diagram of the lens barrel injection mold of the present utility model with some structures hidden;

[0018] Figure 3 is a schematic cross-sectional view of the lens barrel injection mold of the present utility model in an embodiment;

[0019] Figure 4 is another schematic structural diagram of the lens barrel injection mold of the present utility model with some structures hidden;

[0020] Figure 5 is Figure 4 a partial enlarged view of part A of the lens barrel injection mold shown;

[0021] Figure 6 It is a partial structural schematic diagram of the tooth plate in the lens barrel injection mold of the present utility model under an embodiment;

[0022] Figure 7 It is a structural schematic diagram of the product when the glue scooping position remains unchanged;

[0023] Figure 8 It is a structural schematic diagram of the product of the lens barrel injection mold of the present utility model after scooping out the glue.

[0024] Label description:

[0025] 1. Tooth plate; 11. Forming cavity; 12. Runner; 13. Protrusion; 14. Thread; 15. Sub-tooth plate; 16. Stopping portion;

[0026] 2. Template assembly; 21. Feed port. Specific embodiments

[0027] To describe in detail the technical content, achieved purpose and effects of the present utility model, the following is described in conjunction with embodiments and with reference to the accompanying drawings.

[0028] As is well known, the wall thickness of a lens barrel is generally uneven. For this reason, some enterprises will scoop out the glue in the place where the glue thickness of the lens barrel is relatively large to ensure the uniform wall thickness of the lens barrel. Specifically: when the lens barrel has uneven thickness and a relatively deep depth, a mold insert with a corresponding length can be set to scoop out the glue in the place where the glue thickness of the lens barrel is relatively large, and the length of the mold insert can be determined according to the depth of the place where the glue thickness of the lens barrel is relatively large. However, it should be noted that the mold insert is a fitting specifically inserted into the mold core. By changing its length, the depth of scooping out the glue of the lens barrel can be determined, but if the insert length is too long, it is prone to breakage. Therefore, if the place with a relatively large glue thickness of the lens barrel is at a relatively deep position in the lens barrel (such as Figure 7 position B in the figure), restricted by the mold insert (that is, the mold insert is very easy to break, increasing the manufacturing difficulty and cost), the places with a relatively deep depth of the lens barrel cannot be effectively scooped out of the glue, resulting in a slower cooling rate in the area with a relatively large glue thickness of the lens barrel during the machine adjustment process by the injection technician, and bubbles or voids may be generated. During the cooling process, the area with a large glue thickness shrinks more significantly, resulting in uneven shrinkage, making the true roundness and concentricity unable to meet the requirements. Moreover, due to the longer cooling time in the place with a large glue thickness, the production cycle is extended, and more plastic materials need to be heated and cooled, resulting in increased energy consumption. On the other hand, due to the large glue thickness, the technician will increase the injection pressure during machine adjustment, causing the mold to be subjected to greater impact and friction during the injection process, thereby accelerating the wear of the mold.

[0029] To this end, the present utility model provides a barrel injection mold to solve the problem that when the depth of the barrel glue removal is too deep, the mold inserts in the barrel injection mold are prone to breakage and cannot solve the problem of uneven thickness of the barrel. Please refer to Figures 1 to 8 , the barrel injection mold of the present utility model includes a template assembly 2 and a jaw plate assembly provided on the template assembly 2. The jaw plate assembly includes a plurality of jaw plates 1 arranged side by side. A molding cavity 11 is provided in the jaw plate 1, and a convex portion 13 is further provided on the molding surface corresponding to the jaw plate molding cavity; wherein, the convex portion 13 is arranged horizontally circumferentially along the molding surface of the molding cavity 11.

[0030] From the above description, it can be seen that the beneficial effect of the present utility model is that by changing the structure of the jaw plate 1 in the injection mold, a convex portion 13 is provided at a position on the jaw plate 1 corresponding to a relatively large glue thickness and a relatively deep depth of the barrel. Setting the convex portion 13 on the jaw plate can make the prepared product have corresponding concave portions (such as Figure 8 shown as D in

[0031] ), that is, by using the jaw plate 1 provided by the present utility model, it can be realized that the prepared product is equivalent to removing glue from the side wall of the barrel, making the glue thickness ratio of each part close to the average, completing the glue removal of the product, and ensuring that the thickness of each part of the barrel is uniform. That is, without affecting the normal use of the barrel, the position that the mold insert cannot reach is removed by another method to ensure that the thickness of each part of the barrel is uniform.

[0032] Furthermore, in the barrel injection mold of the present utility model, a thread 14 is further included. The thread is provided on the molding surface, and the thread is arranged horizontally circumferentially along the molding surface of the molding cavity.

[0033] From the above description, it can be seen that the jaw plate 1 is used to form the external thread of the barrel. A thread 14 is provided on the molding surface of the jaw plate 1 to form the external thread of the barrel.

[0034] Further, in the lens barrel injection mold of the present utility model, there is a certain distance between the thread 14 and the protrusion 13 in the vertical height direction of the tooth plate 1.

[0035] Further, in the lens barrel injection mold of the present utility model, it includes four tooth plates 1, and the four tooth plates 1 are arranged side by side inside the mold.

[0036] As can be seen from the above description, by providing multiple tooth plates 1, it is convenient to form multiple lens barrels at one time, improving the preparation efficiency of the lens barrels.

[0037] Further, in the lens barrel injection mold of the present utility model, the tooth plate 1 includes two sub-tooth plates 15 connected to each other, and semi-cylindrical grooves are provided on the sub-tooth plates 15. Among them, the two sub-tooth plates 15 are arranged oppositely so that the two grooves enclose to form a cylindrical molding cavity 11 extending in the vertical height direction.

[0038] As can be seen from the above description, by providing grooves with corresponding shapes on the sub-plates, the two oppositely arranged sub-tooth plates 15 can enclose to form a cylindrical cavity with a corresponding shape (i.e., the molding cavity 11), and then the corresponding lens barrel can be prepared.

[0039] Further, in the lens barrel injection mold of the present utility model, a runner 12 is further provided on the tooth plate, and the runner 12 communicates with the molding cavity.

[0040] As can be seen from the above description, by providing the corresponding runner 12, the molten product raw material enters the cavity through the runner to form the product.

[0041] Further, in the lens barrel injection mold of the present utility model, the runner extends along the horizontal width direction of the tooth plate, and the molding cavity extends along the vertical height direction of the tooth plate.

[0042] Further, in the lens barrel injection mold of the present utility model, the cross-sectional shape of the protrusion in the direction perpendicular to its circumferential direction is trapezoidal.

[0043] Further, in the lens barrel injection mold of the present utility model, a stop portion 16 is further provided on the tooth plate 1, and the stop portion 16 is provided at one end of the tooth plate 1 away from the protrusion 13.

[0044] As can be seen from the above description, by providing the corresponding stop portion 16 on the tooth plate 1, it is convenient to fix the tooth plate 1 on the template assembly 2.

[0045] Further, in the lens barrel injection mold of the present utility model, it further includes a feed port 21, and the feed port 21 is provided on the template assembly 2.

[0046] As described above, a feed inlet 21 is provided on the template component 2, and through this feed inlet 21, the preparation materials can be guided into the mold for forming the lens barrel.

[0047] Please refer to Figures 1 to 8 , Embodiment 1 of the present utility model is: an injection mold, which includes a template component 2 and a jaw plate component. The jaw plate component is arranged on the template component 2, and the jaw plate component includes four jaw plates 1, and the four jaw plates 1 are arranged side by side on the template component 2.

[0048] In this embodiment, as Figure 2 shown, the four jaw plates 1 are arranged side by side on the template component 2 along the same horizontal direction. Each jaw plate 1 is provided with a molding cavity 11 and a runner 12. The molding cavity 11 is a cylindrical structure, and the molding cavity 11 extends along the vertical height direction of the jaw plate 1. The runner 12 extends along the horizontal width direction of the jaw plate 1. The shape of the runner 12 is similar to a cylindrical structure, but the cross-section of the part of the runner 12 close to the molding cavity 11 gradually becomes smaller. As Figure 6 shown, the runner 12 is communicated with the molding cavity 11. In addition, a stop portion 16 is further provided on the jaw plate 1, and the stop portion 16 is arranged at one end of the jaw plate 1 away from the protrusion portion 13.

[0049] In this embodiment, a protrusion portion 13 and a thread 14 are provided on the molding surface of the molding cavity 11 of the jaw plate 1. The protrusion portion 13 and the thread 14 are both annular structures, and both are arranged circumferentially horizontally around the molding surface. The cross-sectional shape of the protrusion portion 13 in the circumferential direction is trapezoidal. As Figure 4 and Figure 5 shown, in the vertical height direction of the jaw plate 1, the thread 14 is located above the protrusion portion 13, and there is a certain distance between the two. It should be noted that the runner 12 penetrates through the jaw plate 1 and is communicated with the molding cavity 11, that is, one end of the runner 12 is communicated with the molding cavity 11, and the other end is communicated with the corresponding external space.

[0050] In addition, in this embodiment, as Figure 3 shown, each jaw plate 1 is composed of two sub-jaw plates 15 combined. The two sub-jaw plates 15 are connected to each other. The two sub-jaw plates 15 have the same structure and are arranged oppositely. A semi-cylindrical groove is provided on the sub-jaw plate 15. Among them, the two sub-jaw plates 15 are arranged oppositely so that the two grooves enclose a cylindrical molding cavity 11 extending along the vertical height direction. In addition, it should be noted that other molding jaw plates can be provided below the above-mentioned jaw plate 1 to jointly prepare the corresponding lens barrel with the jaw plate 1.

[0051] It should be noted that Figure 7 is a schematic diagram of an intermediate product when the position of the gumming is not changed. Among them, Figure 7At position B in the figure, it is the position where the glue position ratio is uneven (i.e., the position where the glue thickness is relatively large and the depth is relatively deep). Figure 7 At position C in the figure, it is a glue scooping position of the lens barrel. Figure 8 This is a schematic diagram of the intermediate product prepared by the injection mold of the lens barrel of the present utility model (i.e., the schematic diagram of the intermediate product after changing the glue scooping position). Among them, Figure 8 At position D in the figure, it is the newly added side wall glue scooping groove (i.e., the recessed part) of the present utility model. Figure 8 Position C in the figure and Figure 7 The glue scooping position referred to by position C in it are the same. The present utility model makes corresponding settings for the ejector plate 1, and sets corresponding protrusions 13 on the ejector plate 1, so that the prepared product scoops glue on the side wall of the lens barrel (i.e., Figure 8 the position referred to by D in the figure). Without affecting the normal use of the lens barrel, the position that the mold insert cannot reach is scooped with glue in another way to ensure that the thickness of each part of the lens barrel is uniform.

[0052] In summary, the injection mold of the lens barrel provided by the present utility model: (1) Without breaking the mold insert, try to make the thickness of each part of the lens barrel wall uniform. The present utility model changes the shape of the lens barrel by changing the structure of the ejector plate in the mold, scoops glue on the side wall of the lens barrel, that is, appropriately scoops glue on the part of the lens barrel with relatively thick glue, so that the glue thickness ratio of each part is close to the average. The mold insert does not need to be lengthened, ensuring that the mold insert does not break. This can improve the plasticity and stability of the lens barrel, and also improve the dimensional accuracy of the lens barrel. At the same time, it reduces the problems that occur during the injection molding process of the lens barrel, such as shrinkage, warping deformation, internal stress, concentricity eccentricity, and roundness becoming flared. The uniform glue thickness of the lens barrel can also further shorten the production cycle and improve the service life of the mold. (2) Without affecting the normal use of the lens barrel, the operator changes the original ejector plate structure, and makes a new protrusion structure on the ejector plate corresponding to the place where the glue thickness of the lens barrel is relatively large through electrical discharge machining. After changing the ejector plate structure, the lens barrel injected can complete the side wall glue scooping.

[0053] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent transformations made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, are equally included in the patent protection scope of the present utility model.

Claims

1. A lens barrel injection mold, characterized in that, It includes a template component and a die plate component arranged on the template component. The die plate component includes a plurality of die plates arranged side by side. A forming cavity is provided in the die plate, and a convex portion is further provided on the forming surface corresponding to the die plate forming cavity; wherein, the convex portion is arranged horizontally circumferentially along the forming surface of the forming cavity.

2. The lens barrel injection mold according to claim 1, characterized in that, It further includes a thread, the thread is arranged on the forming surface, and the thread is arranged horizontally circumferentially along the forming surface of the forming cavity.

3. The lens barrel injection mold according to claim 2, wherein, There is a certain distance between the thread and the convex portion in the vertical height direction of the die plate.

4. The lens barrel injection mold according to claim 2, characterized in that, It includes four die plates, and the four die plates are arranged side by side on the template component.

5. The barrel injection mold according to claim 4, characterized in that, The die plate includes two sub-die plates connected to each other. A groove with a semi-cylindrical structure is formed in the sub-die plate. Among them, the two sub-die plates are arranged oppositely so that the two grooves enclose a cylindrical forming cavity extending in the vertical height direction.

6. The lens barrel injection mold according to claim 1, characterized in that, A runner is further provided on the die plate, and the runner is communicated with the forming cavity.

7. The lens barrel injection mold according to claim 6, characterized in that, The runner extends along the horizontal width direction of the die plate, and the forming cavity extends along the vertical height direction of the die plate.

8. The lens barrel injection mold according to claim 1, characterized in that, The cross-sectional shape of the convex portion in the direction perpendicular to its circumferential direction is trapezoidal.

9. The lens barrel injection mold according to claim 1, wherein, A stop portion is further provided on the die plate, and the stop portion is arranged at one end of the die plate away from the convex portion.

10. The lens barrel injection mold according to claim 1, characterized in that, It further includes a feed port, and the feed port is arranged on the template component.

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