A motor car headlamp cover injection molding machine

Abstract

The utility model discloses a kind of bullet train headlamps lampshade injection molding machines, including fixed mould seat, mould seat and split mould cover. Fixed mould seat surface is equipped with mould, and pusher assembly is arranged between fixed mould seat and mould, for driving split mould cover realizes linear motion in clamping and opening process;Fixed mould seat and the inside of mould are all set with cold runner, for importing cooling medium. Mould seat is fixed to the surface of fixed mould seat, its inside is equipped with liquid tank core and annularly distributed heat-conducting fin, for realizing melt flow guiding and heat balanced emission in injection molding process, and mould seat bottom surface is equipped with fastener structure to facilitate disassembly and replacement. The utility model can realize the synchronous drive of split mould cover and mould, with the advantages of cooling efficient, forming stable and convenient to operate, significantly improve the injection quality and production efficiency of bullet train headlamps lampshade.

Description

Technical Field

[0001] This utility model relates to the field of lamp cover injection molding technology, specifically to an injection molding machine for a train headlight cover. Background Technology

[0002] Currently, headlight covers for high-speed trains are generally produced using injection molding. These covers typically require high dimensional accuracy, a smooth surface, and strong heat resistance and impact resistance. Most existing injection molding machines use traditional mold structures, where a fixed mold base, a mold base, and a parting mold cover combine to form a mold cavity. Molten plastic is injected into the mold cavity and then cooled and solidified to form the final shape.

[0003] In existing technologies, the movement of the parting mold cover typically relies on an independent drive mechanism, such as a hydraulic cylinder, pneumatic cylinder, or spring return structure. These drive structures not only occupy a large space but also tend to experience asynchronous movements during mold closing and opening, resulting in a time lag between the movement of the parting mold cover and the pressing action. This can lead to insufficient mold cavity sealing and even molten plastic overflow, affecting the molding quality of the product and the service life of the mold.

[0004] Existing molds often employ a single cold runner system for cooling and heat management, relying solely on cooling water channels within the mold base for temperature reduction. Due to the large size and complex shape of lampshade products, traditional cold runner systems struggle to ensure uniform temperature across the mold cavity, often resulting in localized overheating or insufficient cooling. This leads to quality defects such as warping, shrinkage marks, or stress concentration during molding. Some improvement solutions propose adding localized enhanced cooling zones within the mold base, but these are structurally complex, difficult to manufacture, and still struggle to maintain overall cooling uniformity.

[0005] In summary, existing injection molding machines for train headlight covers have shortcomings in areas such as the synchronization of parting mold drive, the efficiency and uniformity of mold cavity cooling, and the monitoring of the molding process, making it difficult to meet the high requirements for molding precision and production efficiency of headlight cover products. Therefore, there is an urgent need for an injection molding machine with a reasonable structure, efficient cooling, and real-time monitoring capabilities to improve the injection molding quality and production stability of headlight cover products. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: a high-speed train headlight cover injection molding machine, including a fixed mold base, a mold base, and a parting mold cover. A pressure mold is provided on the surface of the fixed mold base, and a propulsion assembly is provided between the fixed mold base and the pressure mold. The propulsion assembly is used to drive the parting mold cover to move during mold closing, realizing the parting and closing of the mold cavity. The mold base is fixedly installed on the surface of the fixed mold base, and its interior is provided with a liquid tank core and several heat-conducting fins for guiding the molten material and dissipating heat during injection molding. Cold runners are provided on the inner sides of both the fixed mold base and the pressure mold to introduce cooling media to reduce the mold cavity temperature. The parting mold cover covers the outer surface of the mold base and is used to maintain the mold cavity seal and provide parting guidance during mold opening and closing.

[0008] In a preferred embodiment, the liquid tank core is further configured as a hollow cavity structure, which guides the flow of molten plastic during injection molding and allows the cooling medium to circulate through the inner cavity of the liquid tank core. Specifically, this structure can improve the uniformity of melt flow and enhance cooling efficiency during injection molding, preventing flow marks and localized overheating in the product.

[0009] In a preferred embodiment, the heat-conducting fins are further configured such that they are evenly distributed circumferentially along the outer periphery of the liquid tank core and connected to the outer wall of the liquid tank core. These fins transfer heat from inside the mold holder to the liquid tank core, where it is carried away by the cooling medium flowing within the liquid tank core. Specifically, this structure increases the heat exchange area between the liquid tank core and the interior of the mold holder, which helps reduce localized heat concentration in the mold.

[0010] In a preferred embodiment, the propulsion assembly includes a slide and a slider arranged on the slide. An obliquely arranged guide rod is provided on the bottom surface of the die. When the fixed die base and the die are closed, the oblique guide rod pushes the slider to move linearly along the slide, causing the parting mold cover to move linearly. Specifically, this structure utilizes the movement of the die itself to drive the parting mold cover, eliminating the need for an additional drive device and improving parting synchronization and the overall structural compactness.

[0011] In a preferred embodiment, the mold base is further configured such that its bottom surface is equipped with a fastening structure that matches the surface of the fixed mold base, allowing for the disassembly and replacement of the mold base when needed. Specifically, this structure facilitates mold switching according to different lampshade models, improving mold adaptability and maintenance efficiency.

[0012] In a preferred embodiment, the mold base is further configured with sensor mounting holes for embedding temperature or pressure sensors to monitor the temperature or pressure during the injection molding process in real time. Specifically, this structure enables dynamic monitoring and feedback adjustment of injection molding process parameters, avoiding product defects caused by process instability and improving production stability and yield.

[0013] In a preferred embodiment, the parting mold cover surface is further configured to be detachably connected to the moving end of the propulsion assembly using bolts. Specifically, this structure ensures stable connection of the parting mold cover during operation, while facilitating quick assembly and disassembly during mold maintenance or replacement, thus improving operational convenience.

[0014] In a preferred embodiment, the parting surface of the mold cover is further configured with a sealing ring groove, in which a sealing ring is embedded to prevent molten plastic from leaking out during injection molding. Specifically, this structure improves the sealing performance of the mold cavity, ensures the dimensional accuracy and surface quality of the molded product, and reduces subsequent cleaning work.

[0015] In summary, this utility model achieves synchronous driving of the parting mold and the pressing mold by setting a propulsion component, combined with the synergistic heat dissipation design of the liquid tank core and heat-conducting fins, and the combined application of cold runner and sensor, which solves the problems of asynchronous parting, insufficient cooling and lack of monitoring in the prior art. It has the advantages of compact structure, high cooling efficiency, stable molding and convenient operation.

[0016] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, by setting a propulsion component between the fixed mold base and the pressure mold, and using the inclined guide rod at the bottom of the pressure mold to drive the parting mold cover to achieve linear motion, the parting and mold closing processes can be completed synchronously with the pressure mold action. This not only simplifies the parting drive structure, but also improves the motion accuracy and stability of the parting mold cover, thereby ensuring the sealing and repeatability of the injection cavity during the mold opening and closing process, and significantly improving the molding consistency of the lampshade products.

[0017] 2. In this invention, a liquid tank core and circumferentially distributed heat-conducting fins are arranged inside the mold base, and cold runners are opened on the inner sides of the fixed mold base and the compression mold, achieving a synergistic effect of multi-channel cooling and balanced heat dissipation. Simultaneously, sensor mounting holes are reserved inside the mold base to enable real-time monitoring of temperature and pressure during the injection molding process. This design not only effectively avoids localized overheating of the mold and product deformation, but also improves cooling efficiency and molding stability, ensuring the injection molding accuracy and production reliability of the train headlight cover. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the mold base mounting structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the mounting structure of the propulsion component and the parting mold cover according to one embodiment of the present invention; Figure 4 This is a schematic diagram of the cold runner and mold base structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of a mold base according to an embodiment of the present invention.

[0019] Figure label: 100. Fixed mold base; 110. Press mold; 120. Propulsion assembly; 130. Cold runner; 200, mold base; 210, liquid tank core; 211, heat-conducting fins; 300, parting mold cover. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0021] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0022] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, a train headlight cover injection molding machine.

[0023] Combination Figures 1-5 As shown, the present invention provides an injection molding machine for a train headlight cover, comprising a fixed mold base 100, a mold base 200, and a parting mold cover 300.

[0024] The fixed mold base 100 has a pressure mold 110 on its surface, and a propulsion assembly 120 is provided between the fixed mold base 100 and the pressure mold 110. The propulsion assembly 120 is used to drive the parting mold cover 300 to move during the mold closing process of the fixed mold base 100 and the pressure mold 110, thereby realizing the opening and closing control of the mold cavity. The mold base 200 is fixedly installed on the surface of the fixed mold base 100. Both the fixed mold base 100 and the pressure mold 110 have cold runners 130 on their inner sides. The cold runners 130 are connected to an external refrigeration system for introducing and cooling the injection molten material. The mold base 200 has a liquid tank core 210 and several heat-conducting fins 211 inside. The liquid tank core 210 is used to guide the flow of molten plastic, and the heat-conducting fins 211 are used to quickly conduct heat and evenly dissipate heat during the molding process. The parting mold cover 300 is installed on the outer surface of the mold base 200 to maintain cavity sealing and parting separation during mold closing and opening.

[0025] In this embodiment, the liquid chamber core 210 is a hollow cavity structure. This hollow cavity can effectively guide the flow of molten material during injection molding and allow the cooling medium to circulate through the internal channels, enabling the mold cavity temperature to drop rapidly and thus ensuring the cooling efficiency of injection molding.

[0026] In this embodiment, heat-conducting fins 211 are evenly distributed circumferentially along the outer periphery of the liquid tank core 210 and connected to the outer wall of the liquid tank core 210. The heat-conducting fins 211 absorb heat from inside the mold base 200 and transfer it to the liquid tank core 210. The cooling medium flowing inside the liquid tank core 210 exchanges heat with the cavity wall of the liquid tank core 210, carrying away the heat transferred by the heat-conducting fins 211. This arrangement increases the heat exchange area between the liquid tank core 210 and the interior of the mold base 200, reducing localized heat concentration.

[0027] In this embodiment, the propulsion assembly 120 includes a slide rail disposed on the surface of the fixed mold base 100 and a slider disposed on the slide rail. The bottom surface of the pressure mold 110 is provided with an obliquely arranged guide rod. When the fixed mold base 100 and the pressure mold 110 are closed, the oblique guide rod pushes the slider to move linearly along the slide rail, thereby causing the parting mold cover 300 to move linearly, realizing the parting and closing operations. This structure can utilize the mechanical characteristics of the mold closing action itself to drive the movement of the parting mold cover, improving the synchronization of mold opening and closing.

[0028] In this embodiment, the bottom surface of the mold base 200 is provided with a fastening structure that matches the surface of the fixed mold base 100. This fastening structure enables the mold base 200 to be quickly disassembled and replaced when needed, facilitating the switching between different models of lampshade products and significantly improving the adaptability and maintenance efficiency of the mold.

[0029] In another embodiment, the mold base 200 has a sensor mounting hole inside. This mounting hole can be used to embed a temperature sensor or a pressure sensor for real-time monitoring of temperature or pressure changes during the injection molding process, thereby enabling feedback and control of process parameters and ensuring the stability of injection molding quality.

[0030] In this embodiment, the outer surface of the parting mold 300 and the moving end of the propulsion assembly 120 are detachably connected by bolts. This connection method ensures a stable fit between the parting mold 300 and the propulsion assembly 120, and also allows for quick disassembly and assembly during mold maintenance or replacement, improving ease of use.

[0031] Furthermore, the parting surface of the parting mold cover 300 is provided with a sealing ring groove, and the sealing ring is embedded in the groove. During the injection molding process, the sealing ring can prevent molten plastic from overflowing from the parting surface, ensuring the sealing of the mold cavity and the molding accuracy of the product, while reducing the workload of cleaning up overflow.

[0032] In summary, this utility model, through the rational coordination of the fixed mold base 100, the mold base 200, and the parting mold cover 300, combined with the cooling design of the liquid tank core 210, the heat-conducting fins 211, and the cold runner 130, and in conjunction with the driving structure of the propulsion assembly 120, achieves the functions of guiding flow, cooling, parting, and sealing of the injection molding cavity. Its structural layout is reasonable, the mold is easy to assemble and disassemble, and it possesses good cooling efficiency and molding stability, effectively improving the injection molding quality and production efficiency of high-speed train headlight covers.

[0033] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A machine for injection molding headlight covers for high-speed trains, characterized in that, include: Fixed mold base (100), mold base (200) and parting mold cover (300); The fixed mold base (100) is provided with a pressure mold (110) on its surface, and a propulsion assembly (120) for driving the parting mold cover (300) to move is provided between the surface of the fixed mold base (100) and the pressure mold (110). The mold base (200) is fixed to the surface of the fixed mold base (100). Cold runners (130) are provided on the inner sides of both the fixed mold base (100) and the pressure mold (110) for introducing and cooling the injection molding molten material. The mold base (200) is used to cooperate with the fixed mold base (100) to form an injection cavity. The mold base (200) is provided with a liquid tank core (210) and several heat-conducting fins (211) inside, which are used to quickly conduct heat and evenly dissipate heat during the injection process. The parting mold cover (300) is installed on the outer surface of the mold base (200) to keep the cavity sealed and the parting mold discrete during the mold closing and opening process.

2. The injection molding machine for a train headlight cover according to claim 1, characterized in that, The liquid tank core (210) is a hollow cavity structure that can guide the flow of molten material during injection molding and allow the cooling medium to circulate through the inner cavity.

3. The injection molding machine for a train headlight cover according to claim 1, characterized in that, The heat-conducting fins (211) are evenly distributed around the outer periphery of the liquid tank core (210) and connected to the outer wall of the liquid tank core (210) to transfer the heat inside the mold base (200) to the liquid tank core (210), which is then carried away by the cooling medium flowing inside the liquid tank core (210).

4. The injection molding machine for a train headlight cover according to claim 1, characterized in that, The propulsion assembly (120) includes a slide and a slider arranged on the surface. The bottom surface of the mold (110) is provided with an obliquely arranged guide rod, which is used to propel the slider and the parting mold cover (300) in a linear motion during the mold closing process of the fixed mold base (100) and the mold (110).

5. The injection molding machine for a train headlight cover according to claim 1, characterized in that, The bottom surface of the mold base (200) is provided with a fastener structure that is adapted to the surface of the fixed mold base (100) for disassembly and replacement of the mold base (200).

6. The injection molding machine for a train headlight cover according to claim 1, characterized in that, The mold base (200) is provided with sensor mounting holes for embedding temperature sensors or pressure sensors to achieve real-time monitoring and feedback of the injection molding process.

7. The injection molding machine for a train headlight cover according to claim 1, characterized in that, The parting mold (300) surface and the moving end of the propulsion assembly (120) are detachably connected by bolts.

8. The injection molding machine for a train headlight cover according to claim 1, characterized in that, The parting surface of the parting mold cover (300) is provided with a sealing ring groove, and the sealing ring is embedded in the groove to prevent the molten plastic from leaking during the injection molding process.

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