Optical structure injection mold

Abstract

The application discloses an optical structure injection mold, comprising a front mold assembly and a rear mold assembly arranged oppositely. The front mold assembly comprises an outer mold front plate, a carrier plate and a front mold core arranged in sequence, the outer mold front plate is connected with the carrier plate through at least a first positioning part, the front mold core is detachably connected with the carrier plate, and a hoisting part is arranged on the outer mold front plate. The rear mold assembly comprises an outer mold rear plate and a rear mold core, the rear mold core is detachably connected with the outer mold rear plate, a mold locking part is arranged on the rear mold core, and a guide part is arranged between the outer mold rear plate and the carrier plate. The front mold assembly and the rear mold assembly can move along a mold closing direction and switch between a first state and a second state, the mold locking part is used for keeping the rear mold core and the front mold core in the first state when the mold locking part is locked, and the guide part is used for keeping the front mold core and the rear mold core aligned in the first state and during switching between the first state and the second state. The low-cost rapid switching of the mold is realized, and the forming precision after switching can be kept.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to an injection mold for an optical structural component. Background Technology

[0002] Optical structural components are typically characterized by small size, intricate structure, high fitting precision, and stringent surface quality requirements. They are widely used in cameras, mobile phones, and other precision optical components, such as silicone protective covers, sealing structures, and support components. During injection molding, optical structural components require injection molds with high machining accuracy, assembly precision, and good stability to ensure dimensional consistency and stable optical performance of the product. Furthermore, because optical structural components are frequently used in consumer electronics products, their models are frequently updated and their specifications are diverse, thus placing high demands on the adaptability and replacement efficiency of the molds.

[0003] In existing technologies, when different models of optical structural components need to be produced, to ensure molding accuracy, the entire mold set usually needs to be disassembled from the injection molding machine, replaced with another mold set of the corresponding model, and then reassembled, aligned, and debugged. Alternatively, in some methods, to control costs, a replaceable mold core structure is used; that is, based on a shared mold frame, different models of mold cores are used to meet the needs of product model switching.

[0004] However, while replacing the entire mold can ensure structural stability and molding accuracy to some extent, it suffers from high mold costs and low equipment utilization. Replacing the mold core, on the other hand, still requires disassembling the entire mold, which can affect mold assembly accuracy and make it difficult to guarantee the molding quality of optical structural components. Therefore, existing injection molds for optical structural components struggle to control mold costs while maintaining molding accuracy when meeting production needs for product model changes. Summary of the Invention

[0005] The purpose of this invention is to provide an injection mold for optical structural components, which solves the problem that existing injection molds for optical structural components are difficult to control mold costs while ensuring the molding accuracy of optical structural components when meeting production needs for product model switching.

[0006] To achieve this objective, the present invention adopts the following technical solution: An injection mold for an optical structural component, characterized in that it includes a front mold assembly and a rear mold assembly that are arranged opposite to each other and both mounted on an injection molding machine; The front mold assembly includes at least a carrier plate and a front mold core, the front mold core being detachably connected to the carrier plate; the rear mold assembly includes an outer mold rear plate and a rear mold core, the outer mold rear plate and the rear mold core being detachably connected. The front mold assembly and the rear mold assembly can move closer to each other or further away from each other along the mold closing direction to switch between the first state and the second state.

[0007] Optionally, the front mold assembly further includes an outer mold front plate, which is connected to the carrier plate at least through a first positioning part. The first positioning part includes a positioning post on the outer mold front plate and a positioning rod on the carrier plate. The positioning post has a socket for the positioning rod to be inserted and engaged.

[0008] Optionally, the front mold core is detachably connected to the carrier plate via a first fastening bolt, and the rear mold core is detachably connected to the outer mold rear plate via a second fastening bolt.

[0009] Optionally, the rear mold core is provided with a locking part. In the first state, an injection cavity is formed between the rear mold core and the front mold core. When the locking part is locked, it is used to keep the rear mold core and the front mold core in the first state. The locking part includes a locking buckle rotatably connected to the rear mold core. The locking buckle has two through holes spaced apart. The front mold core and the carrier plate are both provided with screw holes. In the first state, the two through holes are respectively aligned with the two screw holes.

[0010] Optionally, a guide portion is provided between the outer mold rear plate and the carrier plate. The guide portion is used to keep the front mold core and the rear mold core aligned during the first state and the switching process between the first state and the second state. The guide portion is symmetrically arranged in at least two sets, and the guide portion includes: A guide sleeve passes through the rear mold core and is movably disposed within the rear mold core; A first guide rod is inserted into the carrier plate. The first guide rod extends along the mold closing direction and passes through the front mold core. The end of the first guide rod away from the rear mold assembly serves as the positioning rod of the first positioning part. The second guide rod is fixedly mounted on the rear plate of the outer mold. The first guide rod and the second guide rod can be respectively inserted into the guide sleeve.

[0011] Optionally, the guide sleeve contains a first insertion area, a buffer zone, and a second insertion area in sequence along the mold closing direction. The length of the first insertion area is equal to the length of the second insertion area. In the first state, the length of the first guide rod inside the guide sleeve is equal to the length of the second guide rod inside the guide sleeve, and both are greater than the length of the first insertion area. Two contact blocks are symmetrically slidably arranged within the buffer zone. The two contact blocks can move closer or further away from each other synchronously, and the two contact blocks respectively abut against the ends of the first guide rod and the second guide rod.

[0012] Optionally, the carrier plate has a first groove on the side facing the front mold core, and a first insert plate and a second insert plate are disposed in the first groove, the contours of the first insert plate and the second insert plate matching the contour of the first groove. The front mold core has a second groove on the side facing the carrier plate, and a third insert is provided in the second groove. The outline of the third insert matches the outline of the second groove. A mold insert is fixed to the bottom of the first groove. The mold insert passes through the first insert, the second insert and the third insert on one side along the mold closing direction and is inserted into the front mold core.

[0013] Optionally, the outer mold rear plate has a third groove on the side facing the rear mold core, and a fourth insert is connected to the rear mold core. The fourth insert is embedded in the third groove, and the outline of the fourth insert matches the outline of the third groove.

[0014] Optionally, the hoisting part is provided on the same side of the outer mold front plate, the carrier plate and the outer mold rear plate.

[0015] This invention also provides a method for replacing the mold core of an injection mold for optical structural components, applicable to the injection mold for optical structural components as described above, comprising the following steps: Step S1: The front mold assembly and the rear mold assembly are in the first state. The outer mold front plate and the outer mold rear plate are both connected to the injection molding machine. The mold locking part is disassembled to release the rear mold core from the front mold core and the carrier plate. Step S2: Maximize the mold opening distance of the injection molding machine to create a replacement space between the front mold assembly and the rear mold assembly, with the front mold assembly and the rear mold assembly in the second state. Step S3: Use the hoisting unit to connect the hoisting components to hoist and fix the front mold assembly and the rear mold assembly; Step S4: Disassemble and replace the front mold core and the rear mold core respectively; Step S5: Align and reset the replaced front mold core and rear mold core through the guide part, and lock them again using the mold locking part, so that the front mold assembly and rear mold assembly are in the first state.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In an injection mold for an optical structural component provided by this invention, when the mold core needs to be replaced, the front mold assembly and the rear mold assembly are separated into a second state, and then the front and rear mold cores can be detached and replaced. By making the front mold core and the carrier plate, and the rear mold core and the outer mold rear plate detachably connected, the functional separation of the mold core and the mold frame is achieved, while the outer mold front plate, the carrier plate, and the outer mold rear plate remain unchanged as a common basic structure. Only the front and rear mold cores corresponding to the product model need to be replaced to complete the product switch, thereby significantly reducing the mold manufacturing cost required for multi-model production. In addition, when replacing the mold core, the common basic structure of the front and rear mold assemblies is installed on the injection molding machine, which ensures that the front and rear mold cores remain aligned in the mold-closed state and during the mold-opening and closing process, avoiding the offset of the mold core during disassembly or state switching, ensuring the stability and coaxiality of the injection cavity position, and thus effectively ensuring the molding accuracy and dimensional consistency of the product. Therefore, low-cost and rapid mold switching is achieved, while maintaining the molding accuracy after switching. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0019] Figure 1 This is a schematic diagram of an injection mold for an optical structural component.

[0020] Figure 2 This is a schematic diagram of the front mold assembly.

[0021] Figure 3 This is an exploded view of the front mold assembly.

[0022] Figure 4 This is an exploded view of the front mold assembly.

[0023] Figure 5 This is an exploded view of the rear mold assembly.

[0024] Figure 6This is a schematic diagram of the rear mold assembly.

[0025] Figure 7 for Figure 6 A magnified view of part A in the middle.

[0026] Illustrations: 1. Front mold assembly; 11. Outer mold front plate; 12. Carrier plate; 111. First groove; 112. First insert; 113. Second insert; 114. Mold insert; 13. Front mold core; 131. Second groove; 132. Third insert; 14. First positioning part; 15. Second positioning part; 16. Lifting part; 2. Rear mold assembly; 21. Outer mold rear plate; 211. Third groove; 212. Fourth insert; 22. Rear mold core; 23. Mold locking part; 231. Mold locking buckle; 232. Screw hole; 24. Guide part; 241. Guide sleeve; 242. First guide rod; 243. Second guide rod; 244. Contact block. Detailed Implementation

[0027] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0028] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1: like Figures 1-7As shown, this embodiment of the invention provides an injection mold for optical structural components, used for injection molding of structural components such as silicone protective covers and seals for cameras, mobile phones or other precision optical components. Addressing the shortcomings of existing injection molds in balancing product model switching requirements with the need for finished product replacement and molding accuracy, this embodiment aims to provide an injection mold for optical structural components that ensures high-precision molding and allows for rapid and low-cost core replacement through structural improvements.

[0031] like Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, the injection mold for the optical structural component includes a front mold assembly 1 and a rear mold assembly 2 arranged opposite to each other. The front mold assembly 1 includes an outer mold front plate 11, a carrier plate 12, and a front mold core 13 arranged sequentially, with the front mold core 13 detachably connected to the carrier plate 12; the rear mold assembly 2 includes an outer mold rear plate 21 and a rear mold core 22, with the rear mold core 22 detachably connected to the outer mold rear plate 21, a locking part 23 provided on the rear mold core 22, and a guide part 24 provided between the outer mold rear plate 21 and the carrier plate 12; wherein, the front mold assembly 1 and the rear mold assembly 2 can move along the mold closing direction and switch between a first state and a second state. In the first state, an injection cavity is formed between the rear mold core 22 and the front mold core 13. When the locking part 23 is locked, it is used to keep the rear mold core 22 and the front mold core 13 in the first state. The guide part 24 is used to keep the front mold core 13 and the rear mold core 22 aligned during the first state and the switching process between the first state and the second state.

[0032] Specifically, the injection mold for the optical structural component is mounted on an injection molding machine for injection molding. The injection molding machine can move the front mold assembly 1 and the rear mold assembly 2 closer or further away along the mold closing direction. The outer mold front plate 11 can be connected to the moving platen of the injection molding machine. The carrier plate 12 can be mounted on the outer mold front plate 11 by fastening bolts and connected to the outer mold front plate 11 through the first positioning part 14. The front mold core 13 is disposed on the carrier plate 12 and is fixedly connected to the carrier plate 12 by bolts, locking blocks, or other detachable connection structures, thereby allowing the front mold core 13 to be disassembled and replaced when needed.

[0033] The rear mold core 22 can be installed on the outer mold rear plate 21 by means of bolt connection or locking connection, so that the rear mold core 22 can be disassembled and replaced separately when the product model is changed. The rear mold core 22 is provided with a mold locking part 23, which can be used to reliably lock the rear mold core 22 and the front mold core 13 in the mold closing state, so that the two form a stable injection cavity.

[0034] like Figure 2 , Figure 3 and Figure 4As shown, furthermore, the front mold assembly 1 and the rear mold assembly 2 can move closer to or further away from each other along the mold closing direction under the drive of the injection molding machine, thereby switching between a first state and a second state. The first state is the closed state of the front mold assembly 1 and the rear mold assembly 2, and the second state is the separated state of the front mold assembly 1 and the rear mold assembly 2. A guide portion 24 is provided between the outer mold rear plate 21 and the carrier plate 12. The guide portion 24 not only aligns and positions the front mold core 13 and the rear mold core 22 when the front mold assembly 1 and the rear mold assembly 2 are in the first state, but also continuously provides guidance during the mold switching from the first state to the second state, ensuring accurate alignment of their relative positions when they separate or re-close.

[0035] When the mold is in the first state, the rear mold core 22 and the front mold core 13 are fitted together to form an injection cavity. The clamping part 23 locks the two together, and the guide part 24 ensures the coaxiality and positional accuracy of the injection cavity. When it is necessary to replace the mold core, the clamping part 23 is released, so that the front mold assembly 1 and the rear mold assembly 2 are separated and enter the second state. Under the guidance of the guide part 24, controlled separation is achieved, and then the front mold core 13 and the rear mold core 22 can be disassembled for replacement. By employing detachable connections between the front mold core 13 and the carrier plate 12, and between the rear mold core 22 and the outer mold rear plate 21, the functions of the mold core and the mold frame are separated. The outer mold front plate 11, carrier plate 12, and outer mold rear plate 21 remain unchanged as a shared basic structure. Product switching can be completed simply by replacing the front mold core 13 and rear mold core 22 corresponding to the product model, significantly reducing the mold manufacturing cost required for multi-model production. Furthermore, the guide part 24 ensures that the front mold core 13 and rear mold core 22 remain aligned in the mold-closed state and during mold opening / closing switching, preventing misalignment of the mold core during disassembly, assembly, or state switching. This guarantees the stability and coaxiality of the injection cavity position, effectively ensuring the molding accuracy and dimensional consistency of the product. Therefore, low-cost and rapid mold switching is achieved, while maintaining the molding accuracy after switching.

[0036] In one embodiment of the present invention, the outer mold front plate 11 and the carrier plate 12 are connected at least by a first positioning part 14. The first positioning part 14 includes a positioning post on the outer mold front plate 11 and a positioning rod on the carrier plate 12. The positioning post has an insertion hole for the positioning rod to be inserted. For example, the positioning post is a columnar structure extending along the mold closing direction, with an insertion hole formed at its end. The positioning rod is fixedly disposed on the carrier plate 12 and coaxially disposed with the insertion hole. The positioning post and the positioning rod establish a reference positioning relationship between the outer mold front plate 11 and the carrier plate 12, so that the carrier plate 12 is always kept in a predetermined position, thereby ensuring the spatial position consistency of the front mold core 13 after installation, improving the repeatability accuracy of mold cavity formation, and ensuring the dimensional stability and molding quality of the optical structural component.

[0037] For example, a second positioning part 15 is also provided between the outer mold front plate 11 and the carrier plate 12. The second positioning part 15 includes a first mounting plate, a second mounting plate and a third mounting plate arranged sequentially along the mold closing direction. Multiple sets of fastening screws are passed between the first mounting plate, the second mounting plate and the third mounting plate and the carrier plate 12 to achieve precise positioning and fixation of the carrier plate 12 and the three mounting plates.

[0038] Furthermore, the front mold core 13 is detachably connected to the carrier plate 12 via a first fastening bolt, and the rear mold core 22 is detachably connected to the rear half of the outer mold via a second fastening bolt. Multiple sets of the first and second fastening bolts can be symmetrically arranged. When there is a production need to change product models, the front mold core 13 and rear mold core 22 can be disassembled separately by loosening the first and second fastening bolts, while the outer mold front plate 11, carrier plate 12, and outer mold rear plate 21 do not need to be disassembled. This allows for rapid mold core replacement on the injection molding machine while ensuring the reliable connection between the front mold core 13 and rear mold core 22, thus improving equipment utilization.

[0039] Furthermore, the locking part 23 includes a locking buckle 231 rotatably connected to the rear mold core 22. The locking buckle 231 has two through holes spaced apart. The front mold core 13 and the carrier plate 12 are both provided with screw holes 232. In the first state, the two through holes are aligned with the two screw holes 232 respectively.

[0040] For example, when the front mold assembly 1 and the rear mold assembly 2 are in the first state, the locking buckle 231 rotates to the locking position, aligning the two through holes with the two screw holes 232 on the front mold core 13 and the carrier plate 12, respectively. Then, bolts are passed through the through holes and screwed into the corresponding screw holes 232, thus achieving overall locking of the rear mold core 22, the front mold core 13, and the carrier plate 12. When it is necessary to switch the mold to the second state for mold core replacement, the bolts are removed and the locking buckle 231 is rotated to the release position to release the locking relationship between the front and rear mold cores 22. In the first state, the locking buckle 231 reliably fixes the front mold core 13 and the rear mold core 22, preventing mold core displacement caused by high-pressure melt impact or changes in clamping force during injection molding, and ensuring the stability and alignment accuracy of the injection cavity.

[0041] like Figure 3 , Figure 6 and Figure 7As shown, in this embodiment of the invention, at least two sets of guide parts 24 are symmetrically arranged. Each guide part 24 includes a guide sleeve 241, a first guide rod 242, and a second guide rod 243. The guide sleeve 241 passes through the rear mold core 22 and is movably disposed within it. The first guide rod 242 is inserted onto the carrier plate 12, extends along the mold closing direction, and passes through the front mold core 13. One end of the first guide rod 242 facing away from the rear mold assembly 2 serves as the positioning rod of the first positioning part 14. The second guide rod 243 is fixedly disposed on the outer mold rear plate 21. The first guide rod 242 and the second guide rod 243 can be respectively inserted into the guide sleeve 241.

[0042] For example, the carrier plate 12, the front mold core 13, and the rear mold core 22 are all square plate structures with the same dimensions. The guide parts 24 can be provided in four sets, symmetrically arranged at the four corners of the front mold core 13. In any set of guide parts 24, the guide sleeve 241 passes through the rear mold core 22 along the mold closing direction. The length of the guide sleeve 241 is the same as the thickness of the rear mold core 22, and the guide sleeve 241 is embedded in the rear mold core 22. The first guide rod 242 can be passed through the carrier plate 12 and extends to both sides along the mold closing direction. One end of the rod can be inserted into the positioning post to serve as the positioning rod of the first positioning part 14, and the other end passes through the front mold core 13 to be inserted into the guide sleeve 241. The second guide rod 243 is fixedly set on the outer mold rear plate 21 and extends towards the front mold assembly 1 along the mold closing direction. When the mold closes from the second state to the first state, the first guide rod 242 and the second guide rod 243 are inserted into the guide sleeve 241 from both ends of the guide sleeve 241 to achieve bidirectional insertion.

[0043] Understandably, during the mold closing process, the first guide rod 242 and the second guide rod 243 gradually enter the guide sleeve 241 and form a preliminary guide positioning before the mold locking part 23 locks in; when the mold is fully in the first state, the ends of the first guide rod 242 and the second guide rod 243 abut against each other, and a stable injection cavity is formed between the front mold core 13 and the rear mold core 22.

[0044] By using at least two sets of symmetrically arranged guide parts 24, the front mold assembly 1 and the rear mold assembly 2 form multi-point guiding support in space. Compared with a single guide structure, this significantly improves the stability during mold closing and avoids misalignment caused by skewing or unilateral force. The first guide rod 242 and the second guide rod 243 are inserted from both ends of the guide sleeve 241 to form a bidirectional centering structure. This establishes a unified coaxial reference between the front mold core 13, the rear mold core 22, and the outer mold rear plate 21, which helps ensure the coaxiality of the injection cavity. Moreover, during the switching between the first and second states, the guide parts 24 ensure the coaxiality and positional consistency of the carrier plate 12, the front mold core 13, and the rear mold core 22, effectively avoiding misalignment of the injection cavity due to offset. This helps ensure the injection molding accuracy before and after changing the mold core.

[0045] Furthermore, the guide sleeve 241 contains a first insertion area, a buffer zone, and a second insertion area in sequence along the mold closing direction. The length of the first insertion area is equal to the length of the second insertion area. In the first state, the length of the first guide rod 242 within the guide sleeve 241 is equal to the length of the second guide rod within the guide sleeve 241, and both are greater than the length of the first insertion area. Two contact blocks 244 are symmetrically slidably arranged within the buffer zone. The two contact blocks 244 can move closer or further away from each other synchronously, and the two contact blocks 244 abut against the ends of the first guide rod 242 and the second guide rod 243, respectively.

[0046] Specifically, when the mold is in the first state, the length by which the first guide rod 242 inserts into the guide sleeve 241 is equal to the length by which the second guide rod 243 inserts into the guide sleeve 241, and both insertion lengths are greater than the length of the first insertion area, so that both guide rods pass through their respective insertion areas and partially enter the buffer zone. The buffer zone is located between the first and second insertion areas, and two contact blocks 244 are symmetrically slidably arranged inside it. The two contact blocks 244 can slide relative to each other along the mold closing direction and can be kept in synchronous motion by a linkage mechanism. For example, the two contact blocks 244 are connected by a bidirectional screw, which is rotatably connected to the guide sleeve 241 and extends along the mold closing direction. In the first state, the end of the first guide rod 242 abuts against one of the contact blocks 244, and the end of the second guide rod 243 abuts against the other contact block 244.

[0047] For example, pressure sensors can be installed on the two contact blocks 244. During the mold closing process, when the first guide rod 242 and the second guide rod 243 gradually insert inward and contact the contact blocks 244, the insertion progress of the first guide rod 242 and the second guide rod 243 can be determined by the pressure data from the pressure sensors. This allows for analysis of the coaxiality between the front mold core 13 and the rear mold core 22, which helps ensure the accuracy of the injection cavity. Simultaneously, a spring can be installed between the two contact blocks 244. The two contact blocks 244 move synchronously towards the center or towards both ends inside the guide sleeve 241, forming an elastic buffer between the rods to maintain the balanced insertion of the first guide rod 242 and the second guide rod 243.

[0048] like Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment of the invention, a first groove 111 is provided on the side of the carrier plate 12 facing the front mold core 13. A first insert plate 112 and a second insert plate 113 are provided in the first groove 111, and the outlines of the first insert plate 112 and the second insert plate 113 match the outline of the first groove 111. A second groove 131 is provided on the side of the front mold core 13 facing the carrier plate 12. A third insert plate 132 is provided in the second groove 131, and the outline of the third insert plate 132 matches the outline of the second groove 131. A mold insert 114 is fixed to the bottom of the first groove 111. The mold insert 114 passes through the first insert plate 112, the second insert plate 113 and the third insert plate 132 on one side along the mold closing direction and is inserted into the front mold core 13.

[0049] Specifically, a first insert plate 112 and a second insert plate 113 are sequentially arranged within the first groove 111. The first insert plate 112 and the second insert plate 113 are stacked along the mold closing direction, and their outer contours match the inner contour of the first groove 111, thus forming a surface contact fit after assembly. The first insert plate 112 and the second insert plate 113 can be detachably connected to the carrier plate 12 by screws or locating pins for easy maintenance or replacement. A second groove 131 is formed on the side of the front mold core 13 facing the carrier plate 12, and the contour of the second groove 131 matches the outer contour of the third insert plate 132. The third insert plate 132 is embedded in the second groove 131 and can be connected to the front mold core 13 by fasteners, so that the third insert plate 132 and the front mold core 13 form an integral unit. The second insert plate 113 and the third insert plate 132 can be detachably connected by fasteners. The mold insert 114 extends upward along the mold closing direction, passing through the first insert 112, the second insert 113, and the third insert 132 in sequence, and is finally inserted into the front mold core 13, thus forming a through-type connection structure. The mold insert 114 can be a columnar component with high strength and wear resistance, and its outer periphery fits with the through holes of each insert.

[0050] By matching the contours of the slots and the inserts to form surface contact positioning, radial displacement and circumferential rotation are effectively limited, thereby improving the positioning accuracy of the front mold core 13 relative to the carrier plate 12. The mold insert 114 passes through multiple inserts and is inserted into the front mold core 13, so that a rigid connection path is formed between the carrier plate 12 and the front mold core 13 along the mold closing direction. In the case of frequent replacement of the front mold core 13, each insert can serve as an intermediate transition structure to absorb disassembly and assembly wear, which facilitates local replacement and maintenance, thereby ensuring the consistency of assembly accuracy after multiple disassembly and assembly.

[0051] For example, a lifting part 16 can be provided on the same side of the outer mold front plate 11, the carrier plate 12, and the outer mold rear plate 21. For instance, a lifting eye hole can be opened on the same side wall of the outer mold insert, the carrier plate 12, and the outer mold rear plate 21, and a lifting eye is installed in the lifting eye hole. Using the lifting parts provided on the injection molding machine, the outer mold front plate 11, the carrier plate 12, and the outer mold rear plate 21 can be hung and fixed at the same time to prevent tilting or displacement, which helps to ensure safety during the mold core replacement process.

[0052] Example 2: This invention also provides a method for replacing the mold core of an injection mold for an optical structural component, applicable to the injection mold for an optical structural component of Embodiment 1, comprising the following steps: Step S1: The front mold assembly 1 and the rear mold assembly 2 are in the first state. The outer mold front plate 11 and the outer mold rear plate 21 are both connected to the injection molding machine. The mold locking part 23 is disassembled so that the rear mold core 22 is released from the front mold core 13 and the carrier plate 12. In the first state, the front mold assembly 1 and the rear mold assembly 2 are closed to form an injection cavity, and the outer mold front plate 11 and the outer mold rear plate 21 are fixedly connected to the moving platen and the fixed platen of the injection molding machine, respectively. At this time, by disassembling the locking part 23 provided on the rear mold core 22, the locking relationship between the rear mold core 22, the front mold core 13, and the carrier plate 12 is released. The front mold assembly 1 and the rear mold assembly 2 can then be separated along the mold closing direction by the injection molding machine.

[0053] Step S2: Maximize the mold opening distance of the injection molding machine to create a replacement space between the front mold assembly 1 and the rear mold assembly 2, and the front mold assembly 1 and the rear mold assembly 2 are in the second state. Specifically, the action of the injection molding machine's mold opening mechanism is controlled, and the mold opening distance is adjusted to the maximum stroke, so that the front mold assembly 1 and the rear mold assembly 2 are separated along the mold closing direction, thereby forming sufficient replacement space between the two. The mold switches from the first state to the second state, and the front mold assembly 1 and the rear mold assembly 2 are in a state of separation but still fixed on the injection molding machine template.

[0054] Step S3: Use the hoisting part 16 to connect the hoisting components to hoist and fix the front mold assembly 1 and the rear mold assembly 2. The front mold assembly 1 and the rear mold assembly 2 are suspended and fixed by using the lifting parts 16 set on the front plate 11, the carrier plate 12 and the rear plate 21 of the outer mold to avoid tilting, shaking or accidental displacement due to disassembly and assembly of the mold core.

[0055] Step S4: Disassemble and replace the front mold core 13 and the rear mold core 22 respectively; With the mold in its suspended and detached state, remove the fasteners between the front mold core 13 and the carrier plate 12, and the fasteners between the rear mold core 22 and the outer mold rear plate 21, respectively. Remove the front mold core 13 and the rear mold core 22, and replace them with the corresponding new models of front mold core 13 and rear mold core 22. During the replacement process, the carrier plate 12, the outer mold front plate 11, and the outer mold rear plate 21 remain connected to the injection molding machine, and it is not necessary to disassemble the mold as a whole.

[0056] Step S5: Align and reset the replaced front mold core 13 and rear mold core 22 through the guide part 24, and lock them again using the locking part 23, so that the front mold assembly 1 and the rear mold assembly 2 are in the first state.

[0057] The replaced front mold core 13 and rear mold core 22 are reinstalled in their corresponding positions and aligned and reset with the help of the guide part 24, so that the front mold core 13 and rear mold core 22 are gradually aligned coaxially. After the two are fully aligned and form an injection cavity, they are locked again by the mold clamping part 23, so that the mold returns to the first state and the replacement process is completed.

[0058] By following the above steps, the mold core can be replaced without removing the entire mold from the injection molding machine. This avoids the hoisting, reinstallation, and recalibration processes required for traditional whole-set mold replacement, significantly shortening changeover time, improving equipment utilization, and reducing downtime costs.

[0059] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An optical structure injection mold, characterized by, It includes a front mold assembly (1) and a rear mold assembly (2) that are positioned opposite each other and are both installed on an injection molding machine; The front mold assembly (1) includes at least a carrier plate (12) and a front mold core (13), the front mold core (13) being detachably connected to the carrier plate (12), and the rear mold assembly (2) includes an outer mold rear plate (21) and a rear mold core (22), the outer mold rear plate (21) and the rear mold core (22) being detachably connected; The front mold assembly (1) and the rear mold assembly (2) can move closer to each other or further away from each other along the mold closing direction to achieve switching between the first state and the second state.

2. The optical structural injection mold of claim 1, wherein, The front mold assembly (1) further includes an outer mold front plate (11), which is connected to the carrier plate (12) at least through a first positioning part (14). The first positioning part (14) includes a positioning post on the outer mold front plate (11) and a positioning rod on the carrier plate (12). The positioning post has a socket for the positioning rod to be inserted and engaged.

3. The injection mold for optical structural components according to claim 1, characterized in that, The front mold core (13) is detachably connected to the carrier plate (12) by a first fastening bolt, and the rear mold core (22) is detachably connected to the outer mold rear plate (21) by a second fastening bolt.

4. The injection mold for optical structural components according to claim 1, characterized in that, The rear mold core (22) is provided with a locking part (23). In the first state, an injection cavity is formed between the rear mold core (22) and the front mold core (13). When the locking part (23) is locked, it is used to keep the rear mold core (22) and the front mold core (13) in the first state. The locking part (23) includes a locking buckle (231) rotatably connected to the rear mold core (22). The locking buckle (231) has two through holes spaced apart. The front mold core (13) and the carrier plate (12) are both provided with screw holes (232). In the first state, the two through holes are aligned with the two screw holes (232).

5. The injection mold for optical structural components according to claim 2, characterized in that, A guide portion (24) is provided between the outer mold rear plate (21) and the carrier plate (12). The guide portion (24) is used to keep the front mold core (13) and the rear mold core (22) aligned in the first state and during the switching process between the first state and the second state. The guide portion (24) is provided in at least two symmetrical sets, and the guide portion (24) includes: A guide sleeve (241) passes through the rear mold core (22) and is movably disposed within the rear mold core (22); The first guide rod (242) is inserted on the carrier plate (12). The first guide rod (242) extends along the mold closing direction and penetrates the front mold core (13). The end of the first guide rod (242) away from the rear mold assembly (2) serves as the positioning rod of the first positioning part (14). The second guide rod (243) is fixedly mounted on the outer mold rear plate (21); The first guide rod (242) and the second guide rod (243) can be inserted into the guide sleeve (241) respectively.

6. The injection mold for optical structural components according to claim 5, characterized in that, The guide sleeve (241) contains a first insertion area, a buffer zone, and a second insertion area in sequence along the mold closing direction. The length of the first insertion area is equal to the length of the second insertion area. In the first state, the length of the first guide rod (242) inside the guide sleeve (241) is equal to the length of the second guide rod inside the guide sleeve (241), and both are greater than the length of the first insertion area. Two contact blocks (244) are symmetrically slidably arranged in the buffer zone. The two contact blocks (244) can move closer or further away from each other synchronously, and the two contact blocks (244) respectively abut against the ends of the first guide rod (242) and the second guide rod (243).

7. The injection mold for optical structural components according to claim 1, characterized in that, The carrier plate (12) has a first groove (111) on the side facing the front mold core (13). A first insert plate (112) and a second insert plate (113) are provided in the first groove (111). The outlines of the first insert plate (112) and the second insert plate (113) match the outline of the first groove (111). The front mold core (13) has a second groove (131) on the side facing the carrier plate (12), and a third plate (132) is provided in the second groove (131). The outline of the third plate (132) matches the outline of the second groove (131). The bottom of the first groove (111) is fixed with a mold insert (114), which passes through the first insert (112), the second insert (113) and the third insert (132) along the mold closing direction and is inserted into the front mold core (13).

8. The injection mold for optical structural components according to claim 7, characterized in that, The outer mold rear plate (21) has a third groove (211) on the side facing the rear mold core (22). A fourth insert (212) is connected to the rear mold core (22). The fourth insert (212) is embedded in the third groove (211), and the outline of the fourth insert (212) matches the outline of the third groove (211).

9. The injection mold for optical structural components according to claim 1, characterized in that, The front plate (11) of the outer mold, the carrier plate (12) and the rear plate (21) of the outer mold are all provided with a hoisting part (16) on the same side.

10. A method for changing the mold core of an injection mold for optical structural components, applicable to the injection mold for optical structural components as described in any one of claims 1-9, characterized in that, Includes the following steps: Step S1: The front mold assembly (1) and the rear mold assembly (2) are in the first state. The outer mold front plate (11) and the outer mold rear plate (21) are both connected to the injection molding machine. The mold locking part (23) is disassembled so that the rear mold core (22) is released from the front mold core (13) and the carrier plate (12). Step S2: Maximize the mold opening distance of the injection molding machine to create a replacement space between the front mold assembly (1) and the rear mold assembly (2), and the front mold assembly (1) and the rear mold assembly (2) are in the second state; Step S3: Use the hoisting part (16) to connect the hoisting components and hoist and fix the front mold assembly (1) and the rear mold assembly (2); Step S4: Disassemble and replace the front mold core (13) and the rear mold core (22) respectively; Step S5: Align and reset the replaced front mold core (13) and rear mold core (22) through the guide part (24), and lock them again using the locking part (23) so that the front mold assembly (1) and rear mold assembly (2) are in the first state.

Images