Adjustable optical lens mold and method

Abstract

The present invention discloses an adjustable optical lens mold, comprising a mold body, a mold cavity formed inside the mold body, and a flow channel connected to the mold cavity, wherein a combined adjustment mechanism is provided inside the mold cavity for adjusting the molding diameter of the mold cavity and the molding thickness of the mold cavity to form optical lenses of different sizes; an application method of the adjustable optical lens mold is also provided; the present invention provides a combined adjustment mechanism inside the mold cavity, through which the molding diameter of the mold cavity and the molding thickness of the mold cavity can be synchronously adjusted to form mold cavity molding sizes of different sizes for producing optical lenses of different size requirements, so that one mold has diversity and avoids the tediousness of frequently changing the mold size.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lens production, and in particular to an adjustable optical lens mold and method. Background Art

[0002] The existing mold for forming optical lenses generally includes an upper fixed plate, a lower fixed plate, and a female mold plate and a male mold plate respectively fixed to the upper and lower fixed plates. The upper fixed plate and the lower fixed plate can be relatively close to each other or relatively separated when driven by power. Furthermore, according to the shape of the optical lens to be formed, at least one mold cavity is provided on the corresponding mating surface of the female mold plate and the male mold plate. Usually, dozens of mold cavities are provided on a set of molds. A runner is provided on the mold. One end of the runner is connected to each mold cavity, and the other end is connected to the injection machine, so that the material for forming the lens is squeezed into each mold cavity through the runner. After the lens is formed, the finished lens is ejected from the mold cavity of the male mold plate and the female mold plate.

[0003] Since the mold cavity in the prior art is directly formed on the male and female mold plates, and the shape and size of the mold cavity are manufactured according to the size of the lens to be produced, the shape and size of the mold cavity formed on the mold are fixed. When it is desired to mold and produce lenses of different sizes, the molding machine must stop production, and the female and male mold plates must be removed from the upper and lower fixed plates of the molding machine. Another set of male and female mold plates with different sized mold cavities must be installed on the upper and lower fixed plates of the molding machine before the production of lenses can be carried out. Therefore, when producing products of different sizes, the original mold must be disassembled and another set of molds of different sizes must be assembled, which not only wastes time and manpower but also increases production costs. Summary of the Invention

[0004] The purpose of the present invention is to provide an adjustable optical lens mold and method to solve the technical problem in the prior art that the production of optical lenses of different sizes requires disassembling the original module and reassembling it, which is time-consuming and labor-intensive.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0006] An adjustable optical lens mold includes a mold body, a mold cavity formed inside the mold body, and a flow channel connected to the mold cavity. A combined adjustment mechanism is provided inside the mold cavity for adjusting the molding diameter and molding thickness of the mold cavity to form optical lenses of different sizes.

[0007] As a preferred solution of the present invention, a plurality of mold cavities are provided, and the flow channel is simultaneously connected to the plurality of mold cavities.

[0008] As a preferred solution of the present invention, the mold cavity is composed of multiple molding segments with different diameters, the combined adjustment mechanism is used to directionally select a single molding segment for forming an optical lens and adjust the thickness of the molding segment, and the flow channel is selectively connected to a single molding segment.

[0009] As a preferred solution of the present invention, the mold body includes an upper mold and a lower mold engaged with the upper mold;

[0010] The mold cavity includes an upper mold cavity and a lower mold cavity with different diameters, the upper mold cavity and the lower mold cavity are arranged one-to-one on the upper mold and the lower mold, and when the upper mold and the lower mold are closed, the upper mold cavity and the lower mold cavity jointly form two molding sections with different diameters;

[0011] The combined adjustment mechanism includes a first adjustment component for adjusting the thickness of the upper mold cavity and a second adjustment component for adjusting the thickness of the lower mold cavity. The first adjustment component and the second adjustment component work simultaneously to adjust the molding diameter and molding thickness of the mold cavity.

[0012] As a preferred solution of the present invention, the first adjustment assembly includes a first forming plate disposed inside the upper mold cavity and tightly fitted with the inner wall of the upper mold cavity, and a first linkage rod connected to the first forming plate for pushing the first forming plate to move, the first linkage rod extending through the upper mold to the outside and connected to a first pushing structure for pushing the first linkage rod and controlling the moving distance of the first forming plate;

[0013] The second adjustment component includes a second forming plate arranged inside the lower mold cavity and tightly fitted with the inner wall of the lower mold cavity, and a second linkage rod connected to the second forming plate for pushing the second forming plate to move. The second linkage rod extends through the lower mold to the outside and is connected to a second pushing structure for pushing the second linkage rod and controlling the moving distance of the second forming plate.

[0014] As a preferred solution of the present invention, the upper mold and the lower mold both include an outer ring seat in the shape of an annulus and an inner ring seat rotatably installed inside the outer ring seat. The upper and lower inner ring seats are embedded to form a superimposed seat that rotates together. The multiple mold cavities are distributed in the shape of an annulus in the outer ring seat. The flow channel includes a mainstream channel opened along the central axis direction of the inner ring seat superimposed seat. The mainstream channel is sequentially connected with a first diversion channel for conducting the upper mold cavity and a second diversion channel for conducting the lower mold cavity. The projections of the first diversion channel and the second diversion channel in the vertical direction do not completely overlap so that when the upper and lower inner ring seats rotate together, only one of the upper mold cavity and the lower mold cavity is connected at the same time.

[0015] As a preferred solution of the present invention, threaded columns are connected to the ends of the first linkage rod and the second linkage rod, and the threaded columns pass through the upper mold and the lower mold and extend to the outside. The first pushing assembly and the second pushing assembly both include a rotating ring rotatably installed on the outer periphery of the threaded column, and an inner countersunk hole is provided on the side of the rotating ring away from the mold body. A positioning gear with a cross-section consistent with the inner countersunk hole and a thickness less than the depth of the inner countersunk hole is provided at the end of the threaded column. Pressure is applied to the rotating ring by an external pressure device so that the first molding plate and the second molding plate reach the specified position to complete the molding size adjustment of the mold cavity.

[0016] As a preferred solution of the present invention, recesses are provided at positions of the upper mold and the lower mold on the lower surface of the rotating ring, a spring is provided in the recess, one end of the spring is fixedly connected to the bottom of the recess, and the other end of the spring extends to the outside of the recess and contacts the rotating ring when the rotating ring moves.

[0017] The present invention also provides an application method of the above-mentioned adjustable optical lens mold, comprising the following steps:

[0018] Step 100: Push the first molding plate until it reaches the boundary between the upper and lower mold cavities to completely close the upper mold cavity. Move the second molding plate to obtain a predetermined depth for the lower mold cavity. Close the molds and inject the optical lens raw material into the lower mold cavity through the runner. After molding, open the mold to obtain an optical lens having a predetermined thickness consistent with the diameter of the lower mold cavity.

[0019] Step 200: Push the second molding plate until it reaches the boundary between the upper mold cavity and the lower mold cavity so that the lower mold cavity is completely closed, move the first molding plate to obtain the set depth of the lower mold cavity, close the mold, and inject the optical lens raw material into the upper mold cavity through the runner. After molding, open the mold to obtain an optical lens with a predetermined thickness consistent with the diameter of the upper mold cavity.

[0020] As a preferred embodiment of the present invention, the method of pushing the first forming plate and the second forming plate includes:

[0021] Step 301: Rotate the rotating ring so that the distance between the rotating ring and the mold body is equal to the preset moving distance of the first forming plate or the second forming plate;

[0022] Step 302: Using an external pressure mechanism to apply pressure to the rotating plate so that the rotating ring is in close contact with the upper die or the rotating plate is in close contact with the lower die, and the spring is completely inserted into the recess;

[0023] Step 303: After the optical lens is formed, the pressure on the rotating ring is released to restore the spring to its initial state, and the first molding plate and the second molding plate are separated from the molded optical lens.

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

[0025] The present invention is provided with a combined adjustment mechanism inside the mold cavity, through which the molding diameter of the mold cavity and the molding thickness of the mold cavity can be synchronously adjusted to form mold cavity molding sizes of different sizes for producing optical lenses with different size requirements, so that one mold has diversity and avoids the tediousness of frequently changing the mold size. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0027] Figure 1 A structural schematic diagram of a palletizing adjustable optical lens mold is provided for an embodiment of the present invention.

[0028] The numbers in the figure represent the following:

[0029] 10-mold body; 20-mold cavity; 30-flow channel; 40-combined adjustment mechanism;

[0030] 11-upper die; 12-lower die;

[0031] 21 - upper die cavity; 22 - lower die cavity; 23 - first forming plate; 24 - first linkage rod; 25 - second forming plate; 26 - second linkage rod; 27 - threaded column; 28 - rotating ring;

[0032] 31-main flow channel; 32-first branch flow channel; 33-second channel;

[0033] 121-outer ring seat; 122-inner ring seat; 123-notch; 124-spring;

[0034] 271-positioning gear;

[0035] 281-Internal countersunk hole. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] like Figure 1 As shown, the present invention provides an adjustable optical lens mold, characterized in that it includes a mold body 10, a mold cavity 20 formed inside the mold body 10, and a flow channel 30 connected to the mold cavity 20, and a combined adjustment mechanism 40 is provided inside the mold cavity 20 for adjusting the molding diameter of the mold cavity 20 and the molding thickness of the mold cavity 20 to form optical lenses of different sizes.

[0038] Based on the existing structure of the above-mentioned adjustable optical lens mold, the embodiment of the present invention is characterized in that the molding diameter of the mold cavity 20 and the molding thickness of the mold cavity 20 can be synchronously adjusted through the combined adjustment mechanism 40 to form mold cavities 20 molding sizes of different sizes for the production of optical lenses with different size requirements, so that one mold has diversity and avoids the tediousness of frequently changing the mold size.

[0039] Specifically, the mold cavity 20 may be provided in one or more forms. When the mold cavity is provided in multiple forms, the flow channel 30 is communicated with the multiple mold cavities 20 at the same time.

[0040] The specific adjustment principle of the above-mentioned combined adjustment mechanism 40 is: the mold cavity 20 is composed of multiple molding segments with different diameters, the combined adjustment mechanism 40 is used to directionally select a single molding segment for forming an optical lens and adjust the thickness of the molding segment, and the flow channel 30 is selectively connected to a single molding segment.

[0041] That is, a certain molding segment having a diameter consistent with the required size is first determined by the combined adjustment mechanism 40, and then the height of the segment is adjusted, thereby forming an optical lens with a preset diameter and thickness.

[0042] The mold body 10 includes an upper mold 11 and a lower mold 12 fitted with the upper mold 11;

[0043] The mold cavity 20 includes an upper mold cavity 21 and a lower mold cavity 22 of different diameters. The upper mold cavity 21 and the lower mold cavity 22 are arranged one-to-one on the upper mold 11 and the lower mold 12, and when the upper mold 11 and the lower mold 12 are closed, the upper mold cavity 21 and the lower mold cavity 22 together form two molding sections of different diameters.

[0044] The combined adjustment mechanism 40 includes a first adjustment component for adjusting the thickness of the upper mold cavity 21 and a second adjustment component for adjusting the thickness of the lower mold cavity 22. The first adjustment component and the second adjustment component work simultaneously to adjust the molding diameter and molding thickness of the mold cavity 20.

[0045] The first adjustment assembly includes a first forming plate 23 disposed inside the upper mold cavity 21 and tightly fitted with the inner wall of the upper mold cavity 21, and a first linkage rod 24 connected to the first forming plate 23 for pushing the first forming plate 23 to move. The first linkage rod 24 extends through the upper mold 11 to the outside and is connected to a first pushing structure for pushing the first linkage rod 24 and controlling the moving distance of the first forming plate 23.

[0046] The second adjustment component includes a second forming plate 25 arranged inside the lower mold cavity 22 and tightly fitted with the inner wall of the lower mold cavity 22, and a second linkage rod 26 connected to the second forming plate 25 for pushing the second forming plate 25 to move. The second linkage rod 26 passes through the lower mold 12 and extends to the outside and is connected to a second pushing structure for pushing the second linkage rod 26 and controlling the moving distance of the second forming plate 25.

[0047] The upper mold 11 and the lower mold 12 both include an outer ring seat 121 in the form of an annular ring and an inner ring seat 122 rotatably installed inside the outer ring seat 121. The upper and lower inner ring seats are interlocked to form a stacking seat that rotates together. A plurality of mold cavities 20 are distributed in the outer ring seat 121 in the form of an annular ring. The flow channel 30 includes a mainstream channel 31 opened along the central axis direction of the stacking seat of the inner ring seat 122. The mainstream channel 31 is sequentially connected with a first diversion channel 32 for conducting the upper mold cavity 21 and a second diversion channel 33 for conducting the lower mold cavity 22. The vertical projections of the first diversion channel 32 and the second diversion channel 33 are not completely overlapped so that when the upper and lower inner ring seats 122 rotate together, only one of the upper mold cavity 21 and the lower mold cavity 22 is connected at the same time.

[0048] Here, the scraps formed in the flow channel 30 can be removed by disassembling the inner ring seat 122 and removing it from the mold, or by using an ejector or the like.

[0049] A threaded column 27 is connected to the end of the first linkage rod 24 and the second linkage rod 26, and the threaded column 27 extends through the upper mold 11 and the lower mold 12 to the outside. The first pushing assembly and the second pushing assembly both include a rotating ring 28 rotatably mounted on the outer periphery of the threaded column 27, and an inner countersunk hole 281 is provided on the side of the rotating ring 28 away from the mold body. A positioning gear 271 is provided at the end of the threaded column 27, which has a cross-section consistent with the inner countersunk hole 281 and a thickness less than the depth of the inner countersunk hole 281. Pressure is applied to the rotating ring 28 by an external pressure device so that the first molding plate 23 and the second molding plate 25 reach the specified position to complete the molding size adjustment of the mold cavity.

[0050] A recess 123 is provided at a position of the upper mold 11 and the lower mold 12 on the lower surface of the rotating ring 28, and a spring 124 is provided in the recess 123. One end of the spring 124 is fixedly connected to the bottom of the recess 123, and the other end of the spring 124 extends to the outside of the recess 123 and contacts the rotating ring 28 when the rotating ring 28 moves.

[0051] The specific method of using the above-mentioned adjustable optical lens mold in mold production includes the following steps:

[0052] Step 100: Push the first molding plate until it reaches the boundary between the upper and lower mold cavities to completely close the upper mold cavity. Move the second molding plate to obtain a predetermined depth for the lower mold cavity. Close the molds and inject the optical lens raw material into the lower mold cavity through the runner. After molding, open the mold to obtain an optical lens having a predetermined thickness consistent with the diameter of the lower mold cavity.

[0053] Step 200: Push the second molding plate until it reaches the boundary between the upper mold cavity and the lower mold cavity so that the lower mold cavity is completely closed, move the first molding plate to obtain the set depth of the lower mold cavity, close the mold, and inject the optical lens raw material into the upper mold cavity through the runner. After molding, open the mold to obtain an optical lens with a predetermined thickness consistent with the diameter of the upper mold cavity.

[0054] Furthermore, the method of pushing the first forming plate and the second forming plate includes:

[0055] Step 301: Rotate the rotating ring so that the distance between the rotating ring and the mold body is equal to the preset moving distance of the first forming plate or the second forming plate;

[0056] Step 302: Use an external pressure mechanism to apply pressure to the rotating plate so that the rotating ring is in close contact with the upper die or the rotating plate is in close contact with the lower die, and the spring is completely inserted into the notch. The notch is designed to protect the spring from excessive extrusion.

[0057] Step 303: After the optical lens is formed, the pressure on the rotating ring is released to restore the spring to its initial state. Under the reaction force of the spring, the first molding plate and the second molding plate move away from the molded optical lens to achieve rapid separation from the molded optical lens, making it easier to remove the subsequent lenses.

[0058] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. An adjustable optical lens mold, characterized in that: The invention comprises a mold body (10), a mold cavity (20) formed inside the mold body (10), and a flow channel (30) communicating with the mold cavity (20); a combined adjustment mechanism (40) is provided inside the mold cavity (20) for adjusting the molding diameter and molding thickness of the mold cavity (20) to form optical lenses of different sizes; There are multiple mold cavities (20), and the flow channel (30) is simultaneously connected to the multiple mold cavities (20); The mold cavity (20) is composed of a plurality of molding segments of different diameters, the combined adjustment mechanism (40) is used to directionally select a single molding segment for forming an optical lens and adjust the thickness of the molding segment, and the flow channel (30) is selectively connected to a single molding segment; The mold body (10) comprises an upper mold (11) and a lower mold (12) engaged with the upper mold (11); The mold cavity (20) comprises an upper mold cavity (21) and a lower mold cavity (22) of different diameters, the upper mold cavity (21) and the lower mold cavity (22) are arranged one-to-one on the upper mold (11) and the lower mold (12), and when the upper mold (11) and the lower mold (12) are closed, the upper mold cavity (21) and the lower mold cavity (22) together form two molding sections of different diameters; The combined adjustment mechanism (40) comprises a first adjustment component for adjusting the thickness of the upper die cavity (21) and a second adjustment component for adjusting the thickness of the lower die cavity (22), wherein the first adjustment component and the second adjustment component work simultaneously to adjust the molding diameter and molding thickness of the die cavity (20); The first adjustment component comprises a first forming plate (23) arranged inside the upper mold cavity (21) and tightly fitted with the inner wall of the upper mold cavity (21), and a first linkage rod (24) connected to the first forming plate (23) for pushing the first forming plate (23) to move, the first linkage rod (24) passing through the upper mold (11) and extending to the outside and connected to a first pushing structure for pushing the first linkage rod (24) and controlling the moving distance of the first forming plate (23); The second adjustment assembly comprises a second forming plate (25) arranged inside the lower mold cavity (22) and tightly fitted with the inner wall of the lower mold cavity (22), and a second linkage rod (26) connected to the second forming plate (25) for pushing the second forming plate (25) to move, the second linkage rod (26) passing through the lower mold (12) and extending to the outside and connected to a second pushing structure for pushing the second linkage rod (26) and controlling the moving distance of the second forming plate (25); The upper mold (11) and the lower mold (12) both include an outer ring seat (121) in an annular shape and an inner ring seat (122) rotatably mounted inside the outer ring seat (121). The upper and lower inner ring seats are engaged to form a stacking seat that rotates together. A plurality of mold cavities (20) are distributed in an annular shape inside the outer ring seat (121). The flow channel (30) includes a main flow channel (31) opened along the central axis direction of the stacking seat of the inner ring seat (122). The main flow channel (31) is sequentially connected to the inner ring seat (122). There is a first diversion channel (32) for conducting the upper die cavity (21) and a second diversion channel (33) for conducting the lower die cavity (22), and the projections of the first diversion channel (32) and the second diversion channel (33) in the vertical direction do not completely overlap so that when the upper and lower inner ring seats (122) rotate together, only one of the upper die cavity (21) and the lower die cavity (22) is conducted at the same time. A threaded column (27) is connected to the end of the first linkage rod (24) and the second linkage rod (26), and the threaded column (27) extends to the outside through the upper mold (11) and the lower mold (12). The first pushing assembly and the second pushing assembly both include a rotating ring (28) rotatably mounted on the outer periphery of the threaded column (27). An inner countersunk hole (281) is provided on the side of the rotating ring (28) away from the mold body. A positioning gear (271) is provided at the end of the threaded column (27) with a cross section consistent with the inner countersunk hole (281) and a thickness less than the depth of the inner countersunk hole (281). Pressure is applied to the rotating ring (28) by an external pressure device so that the first molding plate (23) and the second molding plate (25) reach the specified position to complete the molding size adjustment of the mold cavity.

2. The adjustable optical lens mold according to claim 1, characterized in that: A recess (123) is provided at a position of the upper die (11) and the lower die (12) on the lower surface of the rotating ring (28), and a spring (124) is provided in the recess (123). One end of the spring (124) is fixedly connected to the bottom of the recess (123), and the other end of the spring (124) extends to the outside of the recess (123) and contacts the rotating ring (28) when the rotating ring (28) moves.

3. An application method of the adjustable optical lens mold according to any one of claims 1 to 2, characterized in that: The steps include: Step 100: Push the first molding plate until it reaches the boundary between the upper and lower mold cavities to completely close the upper mold cavity. Move the second molding plate to obtain a predetermined depth for the lower mold cavity. Close the molds and inject the optical lens raw material into the lower mold cavity through the runner. After molding, open the mold to obtain an optical lens having a predetermined thickness consistent with the diameter of the lower mold cavity. Step 200: Push the second molding plate until it reaches the boundary between the upper mold cavity and the lower mold cavity so that the lower mold cavity is completely closed, move the first molding plate to obtain the set depth of the lower mold cavity, close the mold, and inject the optical lens raw material into the upper mold cavity through the runner. After molding, open the mold to obtain an optical lens with a predetermined thickness consistent with the diameter of the upper mold cavity.

4. The application method of an adjustable optical lens mold according to claim 3, characterized in that: The method of pushing the first forming plate and the second forming plate includes: Step 301: Rotate the rotating ring so that the distance between the rotating ring and the mold body is equal to the preset moving distance of the first forming plate or the second forming plate; Step 302: Using an external pressure mechanism to apply pressure to the rotating plate so that the rotating ring is in close contact with the upper die or the rotating plate is in close contact with the lower die, and the spring is completely inserted into the recess; Step 303: After the optical lens is formed, the pressure on the rotating ring is released to restore the spring to its initial state, and the first molding plate and the second molding plate are separated from the molded optical lens.

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