An injection mold for forming a light shield

Abstract

The utility model relates to a kind of injection mould for forming shading cover, including upper die assembly and lower die assembly, upper die assembly includes upper model core, lower die assembly includes lower model core, further include lateral slider and be used for driving lateral slider lateral movement lateral drive mechanism;The lower surface of upper model core is provided with upper model cavity, the upper surface of lower model core is provided with lower model cavity, lateral slider has towards the forming surface of upper model cavity and lower model cavity;When clamping, upper model cavity, lower model cavity and forming surface jointly enclose closed cavity for forming shading cover.This utility model provides a kind of injection mould for forming shading cover, it can effectively form the shading cover product with lateral geometric feature.

Description

Technical Field

[0001] This utility model relates to the field of plastic molding and processing, specifically to an injection mold for molding light shields for optical devices. Background Technology

[0002] In the field of optical component manufacturing, light shields are a common component, and their internal design often incorporates complex lateral geometry, such as recesses, lateral flanges, or non-perpendicular curved surfaces. The presence of these structures places specific requirements on the molding dies.

[0003] Currently, common two-platen injection molds typically face limitations when dealing with this type of structure. The mold cavity mainly consists of fixed upper and lower mold sections, making it difficult to directly mold or demold features on the product's sidewalls using a simple mold opening direction. Some molds attempt to use movable inserts or other internal core-pulling mechanisms, but these solutions sometimes complicate the overall mold structure, increasing manufacturing and maintenance complexity. During the molding process, improper handling of lateral features can lead to demolding difficulties, increasing the risk of product damage, or necessitating the disassembly of the complex structure into multiple parts for subsequent processing, which is detrimental to product integrity and may increase assembly costs.

[0004] Therefore, for sunshade products with lateral features, there is a need for an injection mold that can balance molding integrity, operational reliability, and ease of maintenance. Utility Model Content

[0005] In view of this, the present invention provides an injection mold for molding light shields, which can effectively mold light shield products with lateral geometric features.

[0006] The objective of this utility model is achieved through the following technical solution: An injection mold for molding a light shield includes an upper mold assembly and a lower mold assembly. The upper mold assembly includes an upper mold core, and the lower mold assembly includes a lower mold core. It also includes a lateral slider and a lateral drive mechanism for driving the lateral slider to move laterally. The lower surface of the upper mold core is provided with an upper mold cavity, and the upper surface of the lower mold core is provided with a lower mold cavity. The lateral slider has a molding surface facing the upper mold cavity and the lower mold cavity. When the mold is closed, the upper mold cavity, the lower mold cavity, and the molding surface together form a closed cavity for molding the light shield.

[0007] By introducing a lateral slider driven by a lateral drive mechanism, which works in conjunction with the upper and lower mold structures to form a closed cavity for molding a light shield, this structure enables efficient molding of complex geometric shapes with lateral features. The lateral slider moves precisely under the control of the lateral drive mechanism, its molding surface seamlessly connecting with the upper and lower mold cavities to form a complete molding surface, ensuring product contour integrity and dimensional accuracy, and avoiding subsequent machining. The lateral drive mechanism ensures reliable motion, making the molding process stable and controllable, and guaranteeing product consistency in mass production. This design enhances mold flexibility; by adjusting the slider, it can adapt to different product requirements, shortening the development cycle. Simultaneously, this structure promotes uniform flow of molten plastic, reduces internal stress and warpage, and improves the mechanical strength and optical properties of the parts.

[0008] Preferably, the lateral drive mechanism includes a drive source, a guide component, and a slider base. The slider base is fixed to the lower mold component, the guide component is slidably disposed on the slider base and driven by the drive source, and the lateral slider is connected to the guide component.

[0009] This modular design separates the drive, guide, and support functions, enhancing system rigidity. The slider base provides a stable mounting reference, resisting clamping forces during injection molding. The guide assembly ensures precise motion trajectories and accurate alignment of the molding surface. The drive source controls the timing of movements, achieving perfect coordination of mold actions and improving production efficiency and reliability. This structure facilitates targeted maintenance, reducing maintenance complexity.

[0010] Preferably, cooling water channels are provided in the upper model core, the lower model core, and the side slider.

[0011] This design achieves uniform temperature control in the molding area. Uniform and efficient cooling shortens the molding cycle and improves production efficiency. The comprehensive cooling layout accelerates product cooling, increasing output. Simultaneously, it prevents product warping and deformation, ensures dimensional stability, improves product surface quality, and enhances appearance consistency.

[0012] Preferably, the cooling channels in the upper model core, lower model core, and lateral slider extend along the contour of the closed cavity.

[0013] The contoured cooling channels optimize thermal management efficiency, ensuring equal heat transfer distances across all parts. Uniform cooling rates reduce uneven shrinkage, effectively suppressing product warpage and maintaining design geometry and dimensional tolerances. Simultaneously, it improves the product's surface microstructure, enhancing appearance quality and accelerating production cycles.

[0014] Preferably, both the upper mold core and the lower mold core are detachably fixed to the fixing plates of the upper mold assembly and the lower mold assembly.

[0015] Modular installation facilitates maintenance and replacement, simplifies repair processes, and reduces downtime. Quick-change design enhances production line flexibility, adapts to diverse production needs, and reduces spare parts costs and overall manufacturing costs.

[0016] Preferably, a mold closing guide mechanism is provided between the upper mold assembly and the lower mold assembly.

[0017] This mechanism guides the mold to precise alignment, preventing core misalignment, ensuring accurate reproduction of the closed cavity geometry, and guaranteeing product dimensional consistency. Simultaneously, it protects the mold core and molding surface from collision damage, extending mold life and improving system stability.

[0018] Preferably, the mold closing guide mechanism includes a first guide post disposed on the upper mold assembly, a second guide post disposed on the lower mold assembly, and a guide sleeve rod slidably sleeved on the outer periphery of the first guide post and the second guide post. The guide sleeve rod is provided with a first sliding part that slidably engages with the first guide post and a second sliding part that slidably engages with the second guide post.

[0019] The segmented guide design enhances system rigidity and reduces the risk of component deformation. Early guide intervention ensures smooth alignment, absorbs lateral offset, and guarantees precise positioning. Shorter guide components facilitate manufacturing and maintenance, ensuring molding accuracy and production process stability.

[0020] Preferably, the forming surface of the side slider is a smooth surface, and the shape of the forming surface is adapted to the shape of the outer wall of the light shield.

[0021] A smooth surface ensures excellent product finish, meeting appearance and optical performance requirements. A precisely fitted molding surface guarantees uniform wall thickness and accurate contours, avoiding shape distortion and improving product visual quality and structural integrity.

[0022] Preferably, the drive source is a linear drive element, such as a hydraulic cylinder or a pneumatic cylinder.

[0023] Linear drive provides stable and ample power, ensuring the slider reliably completes the ejection and resetting actions. Rapid response shortens auxiliary time and increases production cycle time. Good controllability ensures smooth movement, reduces impact, protects the mold, and guarantees molding accuracy. Standardized components facilitate integration and automated control. Hydraulic cylinders are preferred, providing greater thrust and suitable for products requiring high molding clamping forces.

[0024] Preferably, the cooling water channel is an annular channel surrounding the enclosed cavity.

[0025] The annular layout creates a balanced and efficient cooling environment, ensuring heat is evenly dissipated from all sides. Circumferential uniform cooling reduces cooling differences in the product, prevents uneven shrinkage, and maintains product form and position tolerances. It simplifies the flow path, improves cooling efficiency, and contributes to achieving stable and reliable cooling results.

[0026] The advantages of this utility model compared to the prior art are: The injection mold for molding light shields of this invention introduces a laterally movable slider structure and a power mechanism to drive the slider, which works in conjunction with the traditional upper and lower mold system, bringing several positive effects.

[0027] Enhanced ability to form complex structures: The introduction of lateral sliders allows the mold to form a complete cavity incorporating the lateral features of the product. This enables the one-time integral injection molding of sunshades with side concavities or complex outlines, helping to maintain the integrity and consistency of the product structure and avoiding the subsequent splicing or secondary machining required when direct molding is not possible.

[0028] Improved molding quality and stability: The lateral slider, controlled by the lateral drive mechanism, enables precise and highly repeatable position control. This ensures high dimensional stability of the closed cavity formed by the slider molding surface and the upper and lower mold cavities during each mold closing, thus providing favorable conditions for the dimensional accuracy and shape consistency of the molded product, especially its lateral features.

[0029] Production processes and efficiency have been optimized: This integrated design automates the lateral molding action, synchronizing it with the mold opening and closing process. This reduces manual intervention in the production process, helping to shorten the molding cycle of individual products. Simultaneously, the integral molding method simplifies subsequent assembly processes.

[0030] Enhanced mold functionality and adaptability: This structural design provides flexibility for molding different models of light shields. By replacing or modifying the side sliders and corresponding mold cores, it can adapt to the production needs of products with different side structures within a certain range, thus enhancing the mold's versatility.

[0031] This design helps ensure long-term operational reliability: The modular design of the lateral drive mechanism and slider allows for relatively independent lateral motion units. This structure facilitates independent inspection, maintenance, and component replacement of specific units, helping to reduce the complexity of long-term mold maintenance and positively impacting production continuity. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1This is a structural diagram of an injection mold used for molding a light shield according to an embodiment of the present invention.

[0034] Figure 2 This is a partial structural diagram of an injection mold used to form a light shield according to an embodiment of the present invention.

[0035] Figure 3 This is a partial exploded view of an injection mold used to form a light shield according to an embodiment of the present invention.

[0036] Figure 4 This is a partial exploded view from another perspective of an injection mold used to form a sunshade according to an embodiment of the present invention.

[0037] Labeling explanation: 1 Upper mold assembly, 2 Lower mold assembly, 3 Upper mold core, 4 Lower mold core, 5 Side slider, 31 Upper mold cavity, 41 Lower mold cavity, 51 Molding surface, 6 Side drive mechanism, 61 Drive source, 62 Guide assembly, 63 Slider base, 7 Mold closing guide mechanism, 71 First guide post, 72 Second guide post, 73 Guide sleeve rod, 731 First sliding part, 732 Second sliding part. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of this application, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0042] The technical solutions in this application will now be described with reference to the accompanying drawings. Example 1

[0043] This embodiment provides an injection mold for molding a light shield, including an upper mold assembly 1 and a lower mold assembly 2. The upper mold assembly 1 includes an upper mold core 3, and the lower mold assembly 2 includes a lower mold core 4. It also includes a lateral slider 5 and a lateral drive mechanism 6 for driving the lateral slider 5 to move laterally. The lower surface of the upper mold core 3 is provided with an upper mold cavity 31, and the upper surface of the lower mold core 4 is provided with a lower mold cavity 41. The lateral slider 5 has a molding surface 51 facing the upper mold cavity 31 and the lower mold cavity 41. When the mold is closed, the upper mold cavity 31, the lower mold cavity 41 and the molding surface 51 together form a closed cavity for molding the light shield.

[0044] By introducing a lateral slider 5 driven by a lateral drive mechanism 6, which works in conjunction with the traditional upper and lower mold structure, a closed cavity is formed for molding the light shield. The core advantage of this structural design lies in its ability to efficiently and accurately mold light shield products with complex geometries, especially those with lateral grooves, undercuts, or non-perpendicular wall features. During mold closing, the lateral slider 5 moves precisely to the predetermined position under the control of the lateral drive mechanism, and its molding surface 51 seamlessly connects with the upper and lower mold cavities, forming a complete optical-grade molding surface. This ensures the integrity and dimensional accuracy of the light shield product's contour, avoiding product defects or subsequent complex machining processes caused by the inability of traditional molds to handle lateral features. The integration of the lateral drive mechanism ensures the reliability, repeatability, and synchronization of the movement of the lateral slider 5, making the entire molding process stable and controllable, which is crucial for ensuring product consistency under mass production conditions. In addition, this design enhances the flexibility of mold design. Engineers can adjust the shape and movement trajectory of the lateral slider 5 to adapt to the molding requirements of different types of light shields without making large-scale modifications to the main mold structure, significantly shortening the product iteration cycle and reducing development costs. This method, in which the side slider 5 and the upper and lower molds together form the cavity, allows the molten plastic to flow more evenly during the filling process, which helps to reduce the risk of internal stress concentration and warping deformation, thereby improving the mechanical strength and reliability of the optical shielding effect of the molded part.

[0045] In this embodiment, the lateral drive mechanism 6 includes a drive source 61, a guide assembly 62, and a slider base 63. The slider base 63 is fixed to the mold base of the lower mold assembly 2 by bolts. The guide assembly 62 includes at least one linear guide rail and a slider that cooperates with it; the linear guide rail is fixedly mounted on the slider base 63. The drive source 61 is a hydraulic cylinder, the cylinder body of which is fixed to one end of the slider base 63 by a support, and the end of its piston rod is connected to the slider of the guide assembly 62. The lateral slider 5 is mounted on the slider of the guide assembly 62 by fasteners.

[0046] This modular design separates the drive, guide, and support functions, enhancing system rigidity. The slider base provides a stable mounting reference, resisting clamping forces during injection molding. The guide assembly ensures precise motion trajectories and accurate alignment of the molding surface. The drive source controls the timing of movements, achieving perfect coordination of mold actions and improving production efficiency and reliability. This structure facilitates targeted maintenance, reducing maintenance complexity.

[0047] The control flow of this lateral drive mechanism is synchronized with the working cycle of the injection molding machine. Specifically, the drive source 61 is signal-connected to the main control system of the injection molding machine. During mold closing, the main controller of the injection molding machine first sends a signal to the drive source 61, driving the lateral slider 5 to move to the preset molding position and remain locked; subsequently, the upper mold assembly 1 and the lower mold assembly 2 perform the mold closing action. During mold opening, after the product cools and solidifies, the upper mold assembly 1 and the lower mold assembly 2 first separate, and then the main controller sends a reverse signal to the drive source 61, driving the lateral slider 5 to retract from the molding position, releasing the cover on the lateral structure of the product, and preparing for ejection. This sequential control logic ensures reliable connection and interlocking of the actions of each moving part, avoiding the risk of interference and collision.

[0048] In this embodiment, cooling water channels are provided in the upper model core 3, the lower model core 4, and the side slider 5.

[0049] Cooling channels are incorporated into the three core molding components: the upper mold core 3, the lower mold core 4, and the side slider 5. This design achieves comprehensive and balanced temperature control over the molding area. During the injection molding cycle, molten plastic needs to be rapidly cooled and solidified after being injected into the cavity for ejection. Uniform and efficient cooling plays a crucial role in shortening the molding cycle and improving production efficiency. By arranging cooling channels within all critical molding components that directly contact the plastic, heat can be rapidly carried away by the circulating cooling medium, avoiding product defects caused by uneven local cooling. This comprehensive cooling layout significantly reduces the cooling time of the product, allowing each production cycle to be accelerated, thereby increasing output per unit time. Simultaneously, uniform cooling effectively prevents warping, deformation, and internal residual stress caused by different shrinkage rates in different parts of the product, ensuring the dimensional stability and shape accuracy of the sunshade product. This advantage is particularly pronounced for thin-walled or complex structures. Furthermore, a stable temperature field also helps improve the surface quality of the product, reducing the occurrence of appearance defects such as shrinkage marks and air bubbles, and improving the product's appearance consistency.

[0050] In this embodiment, the cooling channels in the upper model core 3, the lower model core 4, and the lateral slider 5 extend along the contour of the closed cavity.

[0051] The layout strategy of the cooling channels is defined, even though they extend along the contour of the closed cavity enclosed by the upper and lower mold cavities and the slider forming surface 51. This contour-following or conformal cooling channel design aims to maintain a relatively constant and small distance between the path of the cooling medium and the geometry of the product surface. This layout greatly optimizes the efficiency of thermal management because it ensures that the heat transfer distance from all parts of the product to the cooling medium is approximately equal, and the heat conduction path is more direct and uniform. The direct effect is that the cooling rate tends to be uniform in all areas of the molded part, which can significantly reduce non-uniform shrinkage caused by temperature differences. For products such as light shields that may have complex curved surfaces or wall thickness variations, this cooling method can effectively suppress warpage deformation, ensuring that the product maintains the designed geometry and strict dimensional tolerances after being removed from the mold. At the same time, uniform cooling also helps to improve the microstructure of the product surface, reduce surface sink marks or gloss differences caused by uneven cooling, and improve the appearance quality of the product. From a production efficiency perspective, more efficient and uniform heat removal means that shorter cooling times can be set, thereby accelerating the production cycle and improving output efficiency.

[0052] The cooling water channel includes an inlet and an outlet, forming a continuous loop. It is machined along the contour of the cavity to ensure uniform cooling.

[0053] In this embodiment, both the upper mold core 3 and the lower mold core 4 are detachably fixed to the fixing plates of the upper mold assembly 1 and the lower mold assembly 2.

[0054] The upper mold core 3 and lower mold core 4 are designed to be detachably fixed to the mounting plates of their respective modules. This modular installation method significantly facilitates mold maintenance, replacement, and adaptive adjustments. During long-term production, the mold core, as a key component directly involved in molding, inevitably experiences wear, corrosion, or accidental damage. The detachable connection allows operators to quickly separate specific mold cores from the mold body for independent repair, polishing, or replacement without requiring overall processing of the bulky upper mold assembly 1 or lower mold assembly 2. This greatly simplifies the maintenance process and reduces mold downtime. Furthermore, when producing different models or specifications of light shields, only the corresponding upper mold core 3 and lower mold core 4 need to be manufactured and replaced; standard components such as the mold frame, guide mechanism, and drive system can remain unchanged. This design enables rapid changeover, significantly enhancing production line flexibility and efficiently responding to diverse, small-batch market demands, while reducing spare parts inventory costs and overall mold manufacturing costs.

[0055] In this embodiment, a mold closing guide mechanism 7 is provided between the upper mold assembly 1 and the lower mold assembly 2.

[0056] A mold-closing guide mechanism 7 is installed between the upper mold assembly 1 and the lower mold assembly 2. The core function of this mechanism is to guide the upper and lower molds along a precise path during the closing process, ensuring accurate alignment. In the high-speed production environment where molds repeatedly open and close, the mold-closing guide mechanism 7, through its precise mechanical constraints, effectively prevents core misalignment that may be caused by equipment gaps or external force interference. This precise alignment is the cornerstone of ensuring product quality stability. It ensures that the closed cavity formed by the upper and lower mold cavities and the side sliders 5 can be reproduced with the same geometric accuracy each time, thus reliably guaranteeing the consistency of the molded light shield product in terms of wall thickness, contour dimensions, and key functional parts. Furthermore, precise guidance also protects the precision mold core and the forming surface 51 of the side sliders 5, preventing hard contact damage such as collisions and compression due to misalignment during mold closing, extending the service life of the main working components of the mold. A smooth and stable mold-closing process also helps reduce impact and vibration during equipment operation, improving the stability and reliability of the entire production system.

[0057] In this embodiment, the mold closing guide mechanism 7 includes a first guide post 71 disposed on the upper mold assembly 1, a second guide post 72 disposed on the lower mold assembly 2, and a guide sleeve 73 slidably sleeved on the outer periphery of the first guide post 71 and the second guide post 72. The guide sleeve 73 is provided with a first sliding part 731 that slidably engages with the first guide post 71 and a second sliding part 732 that slidably engages with the second guide post 72.

[0058] Specifically, a mold-closing guiding mechanism 7 is described, employing a combination of segmented guide pillars and guide sleeves 73. The first guide pillar 71 is connected to the upper mold assembly 1, the second guide pillar 72 is connected to the lower mold assembly 2, and the guide sleeve 73 serves as an intermediate connector, slidingly engaging with both molds via its first sliding portion 731 and second sliding portion 732. This design allows the guide sleeve 73 to intervene in the guiding process earlier, when there is still a certain distance between the upper and lower molds during the initial mold-closing stage. Its advantage lies in decomposing the long guiding stroke into two relatively short sliding pairs, which helps reduce the length-to-diameter ratio of individual guiding components, thereby improving the rigidity of the entire guiding system and reducing the risk of bending or deformation under enormous clamping forces. Segmented guiding also makes machining, manufacturing, and subsequent maintenance more convenient, as shorter guide pillars and sleeves make it easier to ensure their straightness and fit accuracy. During mold closing, this structure provides earlier and smoother guiding contact, guiding the upper and lower molds to gradually and precisely align, effectively absorbing and offsetting any potential lateral offset, and ultimately ensuring precise alignment of the upper and lower mold cores at the end of mold closing. This precise guiding mechanism plays a crucial role in protecting the mold cavity, ensuring product molding accuracy, and maintaining the stability of the production process.

[0059] In this embodiment, the molding surface 51 of the side slider 5 is a smooth surface, and the shape of the molding surface 51 is adapted to the shape of the outer wall of the light shield.

[0060] Two explicit requirements are imposed on the molding surface 51 of the lateral slider 5: first, the surface must be smooth; second, its shape must be compatible with the outer wall shape of the light shield product. A smooth molding surface is fundamental to achieving a high-quality product appearance. It is directly replicated on the corresponding outer surface of the light shield, ensuring that the area has good smoothness, free from obvious scratches, orange peel texture, or other surface defects. This is crucial for meeting the appearance requirements of the light shield and its functional requirement of avoiding stray reflections in the optical system. The shape of the molding surface 51 matching the outer wall shape of the product means that the curved surface is precisely designed and manufactured to perfectly fit the design contour of the light shield. This precise fit ensures that the molded light shield has uniform wall thickness and its geometric dimensions accurately conform to the design intent, avoiding problems such as localized excessive thickness, thinness, or contour distortion caused by shape mismatch. A precisely fitted, smooth molding surface 51 works together to not only improve the visual quality of the product but also ensure its structural integrity and functional realization as a component of the optical element.

[0061] In this embodiment, the driving source 61 is a linear driving element.

[0062] The drive source 61 in the side drive mechanism 6 is specifically defined as a linear drive element. A linear drive element can directly generate controllable linear thrust or pull, and its motion pattern closely matches the linear reciprocating motion required by the side slider 5. Using such elements, such as hydraulic cylinders or pneumatic cylinders, provides stable and sufficient power for the slider's movement, ensuring reliable ejection and resetting actions even when facing certain frictional resistance or plastic clamping force. Linear drive elements typically have a rapid response, enabling rapid slider advance and retreat, which helps shorten the auxiliary time for mold opening and closing, thus contributing to improving the overall production cycle time. These elements usually have good controllability; by adjusting the pressure or flow rate, their output force and movement speed can be controlled, making the slider's movement smoother and reducing impact, which is beneficial for protecting the mold and ensuring molding accuracy. Furthermore, as a technologically mature and standardized component, the linear drive element features a compact structure and ease of integration into the mold control system, facilitating automated production and status monitoring.

[0063] In this embodiment, the cooling water channel is an annular channel surrounding the closed cavity.

[0064] The specific form of the cooling channel is defined as an annular channel surrounding a closed cavity. This annular layout creates a continuous or near-continuous cooling loop around the product molding area. Its advantage lies in its ability to dissipate heat from the cavity walls simultaneously from multiple directions, establishing a more balanced and efficient cooling environment. For light shield products, especially those with circular, square, or polygonal cylindrical structures, the annular channel can closely follow its outline, ensuring that heat is evenly dissipated from all sides of the cavity. This circumferentially uniform cooling effect significantly reduces cooling differences in different directions, effectively preventing uneven shrinkage phenomena such as ellipticization and corner deformation, which is crucial for maintaining key dimensional tolerances such as roundness and flatness. The annular channel design simplifies the flow path of the cooling medium, reduces dead zones, improves coolant utilization and heat exchange efficiency, and helps achieve shorter cooling time settings. From a manufacturing perspective, the annular channel, as a common and effective cooling solution, has relatively mature design and processing technology, which helps ensure the reliability of the final cooling effect. Example 2

[0065] The main difference between this embodiment and Embodiment 1 lies in the specific configuration of the lateral drive mechanism 6.

[0066] In this embodiment, the lateral drive mechanism 6 includes a drive source 61, a guide assembly 62, and a slider base 63. The slider base 63 is fixed to the mold base of the lower mold assembly 2 by bolts. The guide assembly 62 includes at least one linear guide rail fixedly mounted on the slider base 63, and a slider that slides in cooperation with the linear guide rail.

[0067] The drive source 61 is a ball screw mechanism driven by a servo motor. The servo motor is fixedly mounted on one end of the slider base 63, and its output shaft is connected to the ball screw via a coupling. The nut seat of the ball screw is connected to the slider of the guide assembly 62, thereby converting the rotational motion of the servo motor into precise linear motion of the slider. The lateral slider 5 is mounted on the slider of the guide assembly 62 by fasteners.

[0068] The combination of servo motor and ball screw enables precise control of the movement speed and position of the lateral slider 5, resulting in smooth movement and low noise. It is particularly suitable for the production of sunshade products with extremely high requirements for lateral forming accuracy.

[0069] The remaining structures in this embodiment, such as the upper mold core 3, the lower mold core 4, the cooling water channel, and the mold closing guide mechanism 7, are the same as those in Embodiment 1, and will not be described again here.

[0070] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold for molding a light shield, comprising an upper mold assembly (1) and a lower mold assembly (2), wherein the upper mold assembly (1) includes an upper mold core (3) and the lower mold assembly (2) includes a lower mold core (4), characterized in that, It also includes a lateral slider (5) and a lateral drive mechanism (6) for driving the lateral slider (5) to move laterally; the lower surface of the upper model core (3) is provided with an upper model cavity (31), the upper surface of the lower model core (4) is provided with a lower model cavity (41), the lateral slider (5) has a molding surface (51) facing the upper model cavity (31) and the lower model cavity (41), and the shape of the molding surface (51) is adapted to the shape of the outer wall of the light shield; when the mold is closed, the upper model cavity (31), the lower model cavity (41) and the molding surface (51) together form a closed cavity for molding the light shield.

2. The injection mold for molding a light shield according to claim 1, characterized in that, The lateral drive mechanism (6) includes a drive source (61), a guide component (62) and a slider base (63). The slider base (63) is fixed to the lower mold component (2). The guide component (62) is slidably disposed on the slider base (63) and driven by the drive source (61). The lateral slider (5) is connected to the guide component (62).

3. The injection mold for molding a light shield according to claim 1, characterized in that, Cooling water channels are provided in the upper model core (3), lower model core (4) and side slider (5).

4. The injection mold for molding a light shield according to claim 3, characterized in that, The cooling channels in the upper model core (3), lower model core (4) and lateral slider (5) extend along the contour of the closed cavity.

5. The injection mold for molding a light shield according to claim 1, characterized in that, The upper mold core (3) and the lower mold core (4) are both detachably fixed to the fixing plates of the upper mold assembly (1) and the lower mold assembly (2).

6. The injection mold for molding a light shield according to claim 1, characterized in that, A mold closing guide mechanism (7) is provided between the upper mold assembly (1) and the lower mold assembly (2).

7. The injection mold for molding a light shield according to claim 6, characterized in that, The mold closing guide mechanism (7) includes a first guide post (71) disposed on the upper mold assembly (1), a second guide post (72) disposed on the lower mold assembly (2), and a guide sleeve (73) slidably sleeved on the outer periphery of the first guide post (71) and the second guide post (72). The guide sleeve (73) is provided with a first sliding part (731) that slidably engages with the first guide post (71) and a second sliding part (732) that slidably engages with the second guide post (72).

8. The injection mold for molding a light shield according to claim 1, characterized in that, The forming surface (51) of the lateral slider (5) is a smooth surface.

9. The injection mold for molding a light shield according to claim 2, characterized in that, The driving source (61) is a linear driving element.

10. The injection mold for molding a light shield according to claim 4, characterized in that, The cooling water channel is an annular channel surrounding the enclosed cavity.

Images