A loudspeaker support terminal cover injection mold

Abstract

The utility model relates to a loudspeaker support terminal cover injection mold, including upper die and lower mould, the upper die is equipped with upper die kernel, the lower mould is equipped with lower mould kernel, the lower surface of upper die kernel is provided with a plurality of upper die cavities in parallel, the upper surface of lower mould kernel is provided with a plurality of lower die cavities correspondingly, every upper die cavity and corresponding lower die cavity constitute a product cavity after mould closing, the product cavity has the ladder -like inner wall of adapting with the ladder structure of loudspeaker support terminal cover product. The utility model provides a loudspeaker support terminal cover injection mold, improves production efficiency and product quality through multi -cavity design and ladder -like inner wall. The following is explained in detail in combination with specific embodiment.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for a multi-cavity stepped structure speaker bracket terminal cover. Background Technology

[0002] In the field of electronic connector manufacturing, speaker bracket terminal covers typically feature multi-tiered structures and complex geometries. Traditional injection molds for producing such products often employ single-cavity or simple multi-cavity layouts, making it difficult to simultaneously meet the requirements of high efficiency and high precision molding. Due to the complex shape of the stepped sections, ordinary mold cavities often cannot adequately fit the product contours, potentially leading to uneven filling, shrinkage marks, or deformation. Furthermore, single-cavity designs limit capacity expansion and lack flexibility in multi-variety, mass production scenarios. Therefore, a mold solution that balances structural adaptability, molding stability, and production efficiency is needed.

[0003] Specifically, in speaker components, the bracket terminal cover not only serves the core function of protecting the internal conductive terminals, but it is also a crucial part of the overall speaker structure, supporting the acoustic cavity. These parts are typically thin-walled, and because they need to avoid internal structures such as magnetic circuits, voice coils, and leads, their inner and outer walls often exhibit multi-tiered stepped shapes, accompanied by various perforations and holes for fixing, heat dissipation, or sound transmission. These complex structural features place extremely high demands on the cavity replication accuracy of the injection mold, the reliability of the insert's movement, and the venting efficiency. Utility Model Content

[0004] In view of this, the present invention provides an injection mold for a speaker bracket terminal cover, which improves production efficiency and product quality through a multi-cavity design and a stepped inner wall. The following detailed description is provided in conjunction with specific embodiments.

[0005] The objective of this utility model is achieved through the following technical solution: A speaker bracket terminal cover injection mold includes an upper mold and a lower mold. The upper mold has an upper mold core, and the lower mold has a lower mold core. The lower surface of the upper mold core has multiple upper mold cavities arranged side by side, and the upper surface of the lower mold core has multiple lower mold cavities correspondingly arranged. Each upper mold cavity and its corresponding lower mold cavity are molded together to form a product cavity. The product cavity has a stepped inner wall adapted to the stepped structure of the speaker bracket terminal cover product.

[0006] The multi-cavity design allows for the simultaneous molding of multiple products, improving production efficiency and reducing costs. The stepped inner wall ensures precise product shape and reduces defects. The compact structure optimizes space utilization, balances material flow, and enhances product consistency and quality. It facilitates maintenance, extends mold life, and is suitable for large-scale production.

[0007] Preferably, the mold further includes a flow channel system for conveying molten material into the plurality of product cavities.

[0008] The flow channel system delivers material evenly, reducing filling problems and improving injection molding stability and product quality. Optimized flow paths reduce pressure loss, facilitate maintenance, and minimize downtime.

[0009] Preferably, the upper mold core and / or the lower mold core are provided with a detachable molding insert on the stepped inner wall.

[0010] Removable inserts enhance mold flexibility, adapting to different product characteristics. They facilitate replacement and maintenance, reducing downtime costs. They ensure product detail precision, minimizing subsequent processing.

[0011] Preferably, the shape of the molded insert matches the hollow shape on the terminal back cover.

[0012] The insert's shape matches the product's hollowed-out design, allowing for direct molding and reducing processing steps. This improves product consistency and quality, and reduces defects and assembly problems.

[0013] Preferably, there are multiple molded inserts, and the axial directions of the multiple molded inserts are the same or different, so as to extend from the same or different directions and be inserted into the product cavity, for simultaneously forming hollow or hole structures on different side walls of the speaker bracket terminal cover product.

[0014] Multi-directional inserts allow for simultaneous molding of products, improving efficiency and consistency. This reduces the need for multiple molding processes, optimizes mold layout, and enhances flexibility.

[0015] Preferably, at least one of the molding inserts is disposed vertically on the upper or lower mold core; at least another molding insert is disposed horizontally or inclinedly and is mounted on the upper or lower mold by an independent insert fixing block.

[0016] Multi-directional design enhances molding flexibility, while retaining blocks ensure insert stability. This simplifies installation and maintenance, reduces defects, and extends mold life.

[0017] Preferably, the tail of the molding insert, which is arranged in a horizontal or inclined direction, is provided with an inclined pin, and the upper or lower mold is provided with an inclined locking groove that cooperates with the inclined pin. When the mold is closed, the interaction between the inclined pin and the inclined locking groove drives the molding insert to be locked and positioned along its axial direction.

[0018] The tilting pin mechanism automatically locks the insert, improving positioning accuracy and stability. It reduces flash and defects, simplifies operation, and supports high-speed production.

[0019] Preferably, the ends of the plurality of molding inserts extending from different directions form an interlocking or clearance fit within the product cavity to ensure that the product has a complete structure and no flash after molding; and the mating section between the molding inserts and the mold core, which is arranged in a horizontal or inclined direction, is provided with an venting groove.

[0020] Interlocking or clearance fits ensure the integrity of the product structure and eliminate burrs. Venting channels expel gas, reducing bubbles and defects and improving product quality.

[0021] Preferably, both the upper mold core and the lower mold core are provided with cooling water channels, and the paths of the cooling water channels are arranged in accordance with the stepped inner wall.

[0022] The cooling channels conform to the product shape, providing uniform cooling and reducing deformation. This shortens the molding cycle, improves efficiency, and extends mold life.

[0023] Preferably, a mold closing guide mechanism is provided between the upper mold and the lower mold.

[0024] The mold closing guide mechanism ensures precise positioning and reduces misalignment defects. It improves molding accuracy and stability, simplifies operation, and extends mold life.

[0025] The advantages of this utility model compared to the prior art are: The speaker bracket terminal cover injection mold of this utility model improves upon the following aspects by setting multiple correspondingly arranged mold cavities on the upper and lower mold cores, and forming a stepped inner wall in each product cavity that matches the stepped structure of the terminal back cover: The multi-cavity parallel layout supports the simultaneous molding of multiple products, which helps to improve the output efficiency of a single injection cycle and reduce unit production costs and production cycle time. The stepped inner wall is highly compatible with the product's shape, which helps improve the accuracy of replicating complex structures during the molding process and reduces flash, short shots, or dimensional deviations caused by shape mismatch. A well-designed cavity structure helps balance melt flow and pressure transmission, improves product molding consistency, and reduces internal stress and deformation risks. This design also facilitates mold maintenance and cavity adjustment, providing flexibility for the production of products with multiple specifications, while helping to extend the service life of the mold.

[0026] In conclusion, this design has positive significance in improving the molding quality, production efficiency, and mold adaptability of terminal cover products. Attached Figure Description

[0027] 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.

[0028] Figure 1 This is a structural diagram of the injection mold for a speaker bracket terminal cover according to an embodiment of the present invention.

[0029] Figure 2 This is a partial structural diagram of the injection mold for the speaker bracket terminal cover according to an embodiment of the present invention.

[0030] Figure 3 This is a partial exploded view of the injection mold for the speaker bracket terminal cover according to an embodiment of the present invention.

[0031] Figure 4 This is a partial exploded view of the injection mold for the speaker bracket terminal cover of one embodiment of the present invention from another perspective.

[0032] Figure 5 This is a partial three-dimensional structural diagram of the injection mold for the speaker bracket terminal cover according to an embodiment of the present invention.

[0033] Figure 6 This is a partial three-dimensional structural diagram of the injection mold for the speaker bracket terminal cover of one embodiment of the present invention, taken from another perspective.

[0034] Labeling explanation: 1 Upper mold, 2 Lower mold, 3 Upper mold core, 31 Upper mold cavity, 4 Lower mold core, 41 Lower mold cavity, 5 Stepped inner wall, 6 Insert fixing block, 7 Runner system, 8 Molding insert, 9 Inclined pin, 10 Inclined locking groove. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0039] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0040] The speaker bracket terminal cover formed in this embodiment is a key structural component in the speaker unit. Its typical features include: a main body that is square or circular, with an internal multi-tiered structure to precisely fit and support the speaker core; and multiple perforated windows and holes distributed on the side walls and bottom for screw fixing, wire passage, and sound wave conduction. The mold design must accurately reproduce these complex geometric features to ensure the product's structural strength, assembly precision, and acoustic performance.

[0041] This embodiment provides an injection mold for a speaker bracket terminal cover, including an upper mold 1 and a lower mold 2. The upper mold 1 is provided with an upper mold core 3, and the lower mold 2 is provided with a lower mold core 4. The upper surface of the upper mold core 3 is provided with a plurality of upper mold cavities 31 arranged in parallel, and the upper surface of the lower mold core 4 is provided with a plurality of lower mold cavities 41. Each upper mold cavity 31 and the corresponding lower mold cavity 41 are molded together to form a product cavity. The product cavity has a stepped inner wall 5 adapted to the stepped structure of the speaker bracket terminal cover product.

[0042] The speaker bracket terminal cover injection mold, by setting multiple corresponding mold cavities on the upper mold core 3 and lower mold core 4, enables the simultaneous molding of multiple products, thereby improving production efficiency and reducing the production cost per unit and injection cycle time. The stepped inner wall 5 of each product cavity adapts to the stepped structure of the speaker bracket terminal cover product, helping to replicate complex geometries during injection molding. The stepped portion, in particular, supports the product's dimensional stability, structural integrity, and functionality, reducing defects such as flash, short shots, or deformation caused by shape mismatch. The multi-cavity design optimizes mold space utilization, resulting in a compact mold structure, reducing the overall mold size and material manufacturing costs. It also helps to balance the flow and pressure distribution of molten plastic within the cavity, reducing internal stress and uneven shrinkage, and improving product consistency and quality. This layout allows for the production of multiple products in a single injection cycle, suitable for batch production, reducing machine uptime and energy consumption. The matching design of the stepped inner wall 5 reduces subsequent processing steps, such as trimming, grinding, or assembly adjustments, lowering labor costs and time waste. Furthermore, the modular design of the mold core facilitates maintenance, cleaning, and replacement, extending the mold's lifespan and reducing long-term operating costs. The multi-cavity structure also provides production flexibility, allowing for adjustments to the number or configuration of cavities to adapt to different production needs or product variations, enhancing the mold's adaptability and economy.

[0043] In this embodiment, the mold also includes a flow channel system 7 for conveying molten material to multiple product cavities.

[0044] The runner system 7 delivers molten material to multiple product cavities, promoting consistent filling pressure and material flow rate in each cavity during injection molding. This reduces issues like underfilling, overfilling, or warpage caused by uneven material distribution. The runner system 7 optimizes the flow path of the molten material, reduces injection resistance pressure loss, and improves the stability and efficiency of the injection molding process. It helps maintain optimal material temperature and viscosity, mitigating thermal degradation or uneven cooling, thereby improving product surface finish, dimensional accuracy, and mechanical properties. Simultaneously, the runner design facilitates control of material flow direction and speed, preventing eddies or stagnation, reducing bubbles and defects, and improving product yield. The runner system 7 also simplifies mold cleaning and maintenance processes, reduces downtime, supports continuous production, and lowers operating costs.

[0045] Specifically, the runner system 7 includes a main runner, branch runners, and a gate. The main runner connects to the injection molding machine nozzle; the branch runners extend from the end of the main runner and are connected to each product cavity in a balanced layout to ensure that the molten material can fill each cavity synchronously and in equal amounts; the gate connects the branch runners to the product cavities and adopts a point gate or side gate form, the size of which is set according to the product volume and material characteristics to facilitate filling and reduce gate marks.

[0046] In this embodiment, the upper mold core 3 and / or the lower mold core 4 are provided with a detachable molding insert 8 on the stepped inner wall 5.

[0047] Removable molding inserts 8 are installed at 5 points on the stepped inner wall, allowing the mold to flexibly adapt to different shapes of cutouts, holes, or complex features on the product. This enhances the mold's versatility and adjustability, facilitating quick switchover between production of different models of speaker bracket terminal cover products. The removable design of the molding inserts 8 simplifies maintenance and replacement. When the inserts are worn, damaged, or require replacement, they can be replaced independently without having to completely overhaul the mold core, reducing mold downtime and maintenance costs. Simultaneously, the molding inserts 8 can precisely mold local details of the product, such as cutout shapes, supporting the product's structural integrity and dimensional accuracy, reducing subsequent processing requirements. This design also allows for the use of inserts made of different materials to optimize wear resistance or thermal conductivity, extending mold life and improving product surface quality. Furthermore, the removable inserts facilitate cleaning and inspection, helping to maintain the mold's hygiene and long-term stability.

[0048] In this embodiment, the shape of the molded insert 8 matches the hollow shape on the terminal back cover.

[0049] The shape of the molded insert 8 matches the hollow shape on the terminal back cover, ensuring that the required hollow structure is directly molded during the injection molding process, avoiding subsequent processing such as drilling or cutting, and reducing production steps and time costs. This matching design improves the dimensional consistency and appearance quality of the product, reducing assembly problems or functional defects caused by shape deviations. Simultaneously, it helps control material flow and cooling in the hollow area, mitigating stress concentration and deformation risks, and enhancing the product's mechanical strength and durability. The precisely matched insert also simplifies mold debugging and optimization processes, reducing the complexity of design modifications.

[0050] In this embodiment, there are multiple molded inserts 8, and the axial directions of the multiple molded inserts 8 are the same or different, so as to extend from the same or different directions and be inserted into the product cavity, for simultaneously forming hollow or hole structures on different side walls of the speaker bracket terminal cover product.

[0051] Multiple molded inserts 8 extend from the same or different directions and are inserted into the product cavity, allowing for the simultaneous molding of hollow or perforated structures on multiple sidewalls of the speaker bracket terminal cover product. This improves production efficiency and product consistency, reducing the need for multiple molding or assembly processes. This multi-directional design enables the complete molding of products with complex geometries in a single operation, ensuring precise feature positioning and structural coordination on each sidewall, reducing cumulative errors and assembly problems. Simultaneously, it optimizes mold layout and space utilization, avoids interference between inserts, and improves the stability and reliability of the injection molding process. Multi-directional inserts also enhance mold flexibility, facilitating adaptation to product design changes or diversified needs, and supporting multi-variety production. Furthermore, simultaneous molding reduces production cycles and machine uptime, lowering energy consumption and costs.

[0052] In this embodiment, at least one molding insert 8 is disposed vertically on the upper mold core 3 or the lower mold core 4; at least another molding insert 8 is disposed horizontally or inclinedly and is installed on the upper mold 1 or the lower mold 2 by an independent insert fixing block 6.

[0053] The molding inserts 8, positioned vertically, horizontally, or at an angle, are mounted via independent insert fixing blocks 6, providing a flexible yet stable fixation method. This ensures precise positioning and stability of the inserts during injection molding, reducing molding defects caused by displacement or vibration. This multi-directional layout allows for molding product features from different angles, enhancing the mold's adaptability to complex product structures and improving molding accuracy and product integrity. The independent insert fixing blocks 6 simplify the installation and adjustment process, facilitating quick insert replacement or maintenance and reducing downtime. Simultaneously, it helps distribute injection pressure, reducing localized wear on the mold core and extending mold life. The multi-directional arrangement also optimizes material flow and cooling paths, improving product quality.

[0054] In this embodiment, the installation and locking mechanisms of the molding insert 8, which is arranged horizontally or inclinedly, work in concert: First, the molding insert 8 is installed on the upper mold 1 or lower mold 2 by an independent insert fixing block 6, achieving its initial positioning and support; then, through the interaction between the inclined pin 9 at the tail of the molding insert 8 and the inclined locking groove 10 provided in the corresponding mold, the initial positioning is transformed into final axial locking during the mold closing process. During mold closing, the interaction between the inclined pin 9 and the inclined locking groove 10 drives the molding insert 8 to be locked and positioned along its axial direction.

[0055] The mate design of the tilting pin 9 and the angled locking groove 10 automatically drives the molding insert 8 to lock and position axially during mold closing, ensuring the stability and accuracy of the insert during injection molding and reducing flash, dimensional deviations, or product defects caused by loosening or misalignment. This mechanism simplifies the installation and fixing process of the insert, improves operational efficiency, and reduces the need for manual adjustments. Simultaneously, it enhances the automation and reliability of the mold, supports high-speed continuous production, and reduces the risk of failure. The tilting pin 9 design also provides a self-locking function to prevent the insert from retracting under high-pressure injection molding, ensuring consistent molding quality. Furthermore, this structure helps to distribute locking force, reducing stress on other mold components and extending the overall mold life.

[0056] In this embodiment, the ends of multiple molded inserts 8 extending from different directions form a precise mating structure within the product cavity. Specifically, when the ends of two or more inserts meet within the product cavity, their end faces are designed as a stepped interlocking structure or maintain a precise clearance fit of less than 0.02 mm. During mold closing, the interlocking structure can interlock with each other, effectively preventing molten material from seeping into the joint; while the precise clearance fit can both avoid interference between parts and generate sufficient shearing force due to the extremely small gap, thereby jointly ensuring that the product has a complete structure and no flash after molding.

[0057] The interlocking or clearance fit of the eight ends of multiple molding inserts ensures structural integrity and flash-free molding, improving product appearance quality and functional reliability, and reducing subsequent trimming or repair processes. The interlocking design enhances the synergy between inserts, preventing material leakage or misalignment and ensuring precise molding of complex features. Venting channels allow air and gases to escape from the mold cavity during injection molding, reducing defects such as bubbles, scorching, or underfill, and improving product surface finish and internal structure. Simultaneously, venting channels help balance pressure, optimize material flow, and improve injection molding efficiency and quality consistency. This combined design enhances the overall performance and durability of the mold, supporting high-quality production.

[0058] In this embodiment, both the upper mold core 3 and the lower mold core 4 are equipped with cooling channels (not shown in the diagram), but this is conventional technology in the art. The cooling channels adopt a multi-layered annular or conformal structure, and their paths closely follow the contour of the stepped inner wall 5 to ensure that they maintain approximately equal distances from the product surface. Circulating cooling water is introduced into the cooling channels as the cooling medium. By precisely controlling the channel diameter (e.g., φ6mm-φ8mm) and the loop spacing, uniform and efficient cooling of the stepped structure area is achieved, thereby reducing product deformation and shortening the molding cycle.

[0059] The cooling channels are arranged to follow the stepped inner wall 5, ensuring uniform and efficient cooling of the product during injection molding. This reduces differences in internal stress, deformation, or shrinkage caused by uneven cooling, improving the product's dimensional stability and mechanical properties. This design optimizes thermal management, accelerates cooling, shortens molding cycles, and increases production efficiency. Simultaneously, it helps maintain mold temperature stability, reduces thermal fatigue damage, and extends mold life. The cooling channel paths match the product shape, avoiding cooling dead zones, ensuring uniform curing of all parts of the product, and improving surface quality. Furthermore, this layout simplifies cooling system maintenance, supports continuous operation, and reduces energy consumption.

[0060] In this embodiment, a mold closing guide mechanism is provided between the upper mold 1 and the lower mold 2.

[0061] The mold-closing guide mechanism ensures precise positioning and alignment of the upper mold 1 and lower mold 2 during the mold-closing process, reducing product defects such as flash or dimensional inaccuracies caused by misalignment or deviation, and improving molding accuracy and consistency. This mechanism enhances mold stability and reliability, supports high-speed, repetitive mold-closing operations, and reduces wear and failure risks. Simultaneously, it simplifies mold installation and debugging, reduces adjustment time, and improves production efficiency. The mold-closing guide mechanism also helps disperse mold-closing forces, protects mold components from excessive stress, extends mold life, and improves operational safety.

[0062] 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. A speaker bracket terminal cover injection mold, comprising an upper mold (1) and a lower mold (2), wherein the upper mold (1) is provided with an upper mold core (3) and the lower mold (2) is provided with a lower mold core (4), characterized in that, The lower surface of the upper mold core (3) is provided with a plurality of upper mold cavities (31) arranged in parallel, and the upper surface of the lower mold core (4) is provided with a plurality of lower mold cavities (41); each upper mold cavity (31) and the corresponding lower mold cavity (41) are molded together to form a product cavity, and the product cavity has a stepped inner wall (5) adapted to the stepped structure of the speaker bracket terminal cover product.

2. The speaker bracket terminal cover injection mold according to claim 1, characterized in that, The mold also includes a flow channel system (7) for conveying molten material into the plurality of product cavities.

3. The speaker bracket terminal cover injection mold according to claim 1, characterized in that, The upper mold core (3) and / or the lower mold core (4) are provided with a removable molding insert (8) on the stepped inner wall (5).

4. The speaker bracket terminal cover injection mold according to claim 3, characterized in that, The shape of the molded insert (8) matches the hollow shape on the terminal back cover.

5. The speaker bracket terminal cover injection mold according to claim 3, characterized in that, The number of the molding inserts (8) is multiple, and the axial directions of the multiple molding inserts (8) are the same or different from each other, so as to extend from the same or different directions and be inserted into the product cavity, for simultaneously forming hollow or hole structures on different side walls of the speaker bracket terminal cover product.

6. The speaker bracket terminal cover injection mold according to claim 5, characterized in that, At least one of the molding inserts (8) is disposed vertically on the upper mold core (3) or the lower mold core (4); at least another molding insert (8) is disposed horizontally or inclinedly and is installed on the upper mold (1) or the lower mold (2) by an independent insert fixing block (6).

7. The speaker bracket terminal cover injection mold according to claim 6, characterized in that, The tail of the molding insert (8) arranged in a horizontal or inclined direction is provided with an inclined pin (9). The upper mold (1) or lower mold (2) is provided with an inclined locking groove (10) that cooperates with the inclined pin (9). When the mold is closed, the molding insert (8) is driven to lock and position along its axial direction through the interaction between the inclined pin (9) and the inclined locking groove (10).

8. The speaker bracket terminal cover injection mold according to claim 5, characterized in that, The ends of the multiple molding inserts (8) extending from different directions form an interlocking or clearance fit within the product cavity to ensure that the product has a complete structure and no flash after molding; and the molding inserts (8) arranged in the horizontal or inclined direction are provided with venting grooves in the mating section with the mold core.

9. The speaker bracket terminal cover injection mold according to claim 1, characterized in that, Cooling water channels are provided in both the upper mold core (3) and the lower mold core (4), and the path of the cooling water channels follows the stepped inner wall (5).

10. The speaker bracket terminal cover injection mold according to claim 1, characterized in that, A mold closing guide mechanism is provided between the upper mold (1) and the lower mold (2).

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