Pen holder injection mold structure

Abstract

The utility model discloses a penholder injection mold structure, which is characterized in that an independent station injection molding cavity structure is formed by arranging a multi-point hot nozzle and a uniform runner structure, and each station is provided with a complete and independent injection molding cavity and runner system, so that 288 penholders can be produced by one-time injection molding, and the production efficiency is greatly improved. By means of the structural design of the nine-point hot nozzle, the production cost of the pen holder is reduced, economic benefits are improved, a runner balanced distribution system is optimized, it is ensured that molten plastic can be evenly and rapidly filled into each injection molding station, the production quality is ensured, and by designing a cooling and heating system in the mold and arranging a cooling water channel and a heating element in the mold, the production efficiency is improved. The quality consistency of the penholders is ensured through a runner balanced distribution system and accurate temperature control, a sensor can be further arranged in the mold, the temperature of the mold can be accurately controlled through cooperation with a temperature controller, and therefore the stability and high efficiency of the injection molding process are improved.

Description

Technical Field

[0001] This utility model relates to the field of stationery manufacturing technology, specifically a pen barrel injection mold structure capable of simultaneously injection molding multiple pen barrels, aiming to improve pen barrel production efficiency and reduce production costs. Background Technology

[0002] With the continuous innovation of injection molding technology, traditional outdated production processes have been replaced. For injection molding manufacturers, eliminating cold runners and adopting hot runners can bring material savings and shorten the molding cycle, thereby significantly improving production efficiency. Practical applications by many manufacturers have shown that hot runner injection molding is particularly suitable for direct side-entry hot runner systems for molding deep, long shapes and smaller products.

[0003] To ensure uniform injection molding, traditional pen barrel injection molds typically employ higher-pressure injection molding equipment. The high pressure of the copper drum ensures product integrity. However, due to inherent limitations in the existing molds, the output per mold is relatively low, resulting in low production efficiency, and the utilization rate of the mold and its space occupancy are also unsatisfactory. With the increasing market demand for pen products, improving production efficiency and reducing production costs have become urgent issues for the stationery manufacturing industry. Utility Model Content

[0004] In view of the prior art, this utility model provides a high-efficiency injection mold with a multi-cavity design, which can injection mold multiple pen barrels at once. In this embodiment, the mold is equipped with heating and cooling components with temperature controllers to ensure the stability and efficiency of the injection molding process, significantly improve production efficiency, and reduce production costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a pen barrel injection mold structure, including a fixed mold and a moving mold, wherein the moving mold includes an upper base plate assembly with a mounting cavity; a heating base plate for mounting an electric heating plate for heating the moving mold; a hot nozzle base plate for fixing the front end of the injection hot nozzle; the fixed mold includes a flow distribution base plate with a flow equalization plate for distributing the injection plastic, the flow equalization plate on the flow distribution base plate and the hot nozzle base plate forming an injection flow channel; a mold base plate including a bottom hot plate for mounting the electric heating plate, a stationary mold layer one and a stationary mold layer two with partial mold cavities; the flow distribution base plate, stationary mold layer one, stationary mold layer two and the bottom hot plate are used to form a complete product mold cavity, and all are provided with cooling flow channels; a lower base plate assembly with mold closing guide pillars inside; and external fasteners are provided on the outer sides of both the fixed mold and the moving mold.

[0006] Furthermore, the hot nozzle base plate is provided with nine injection hot nozzles, and the flow distribution plate is provided with nine sets of injection flow channels in front of the nine injection hot nozzles. Each set of injection flow channels corresponds to thirty-two product mold cavities that are evenly distributed in four groups around the injection hot nozzle opening.

[0007] Furthermore, the injection nozzle is provided with a conical residual material cavity, which is used to form a residual material rod for the mechanical clamping arm to remove material after injection molding.

[0008] Furthermore, the hot nozzle substrate and the flow divider substrate are also provided with a limiting slider and a stroke component, which are used to limit the parting distance between the fixed mold and the moving mold.

[0009] Furthermore, hooks are also provided on the moving mold and the fixed mold respectively.

[0010] Beneficial effects: This utility model's injection mold structure features a multi-point hot nozzle injection design. Each hot nozzle is equipped with a complete injection cavity and runner system, and they are not interconnected or interfere with each other. This ensures that each pen barrel mold can independently control and adjust the injection pressure parameters. In addition, the evenly distributed runner ensures that the molten plastic can be uniformly and quickly filled into each injection station, and each injection station can uniformly receive the molten plastic material, ensuring the quality consistency of each pen barrel. The mold also features efficient cooling channels and heating elements. By precisely controlling the mold temperature, the injection cycle is shortened, production efficiency is improved, and the surface quality and dimensional accuracy of the pen barrels are ensured, guaranteeing the quality consistency of each pen barrel and ensuring product quality. Furthermore, in this embodiment, all the mold opening limit rods are installed on the outer periphery of the mold frame, facilitating mold disassembly and reducing mold maintenance time. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the mold structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the internal structure of the mold in this embodiment.

[0013] Figure 3 This is a schematic diagram of the flow equalization plate structure in this embodiment.

[0014] Figure 4 This is a schematic diagram of the mold parting state in this embodiment.

[0015] Reference numerals: 1. Fixed mold; 11. Diverter base plate; 111. Hook; 12. Mold base plate; 13. Bottom hot plate; 14. Static mold layer one; 15. Static mold layer two; 16. Cooling channel; 17. Mold closing guide pillar; 18. Fixed external fastener; 19. Lower base plate assembly; 10. Limiting slider; 2. Moving mold; 20. Stroke component; 21. Upper base plate assembly; 22. Heating base plate; 23. Hot nozzle base plate; 24. Mounting cavity; 25. Heating plate; 26. Injection hot nozzle; 261. Conical residual material cavity; 27. Flow equalization plate; 28. Injection channel; 29. ​​Product mold cavity. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0017] like Figure 1-4 The pen barrel injection mold structure shown includes a fixed mold 1 and a movable mold 2. In use, the fixed mold 1 is fixed by the injection molding equipment, and the movable mold 2 is horizontally pulled apart relative to the fixed mold 1 to separate the unloading port. Figure 4 As shown, a mechanical clamping arm is then used to clamp and eject the excess material formed after injection through the injection nozzle 26. After unloading, the moving mold 2 closes again, and the cycle is repeated to achieve rapid injection molding production. The solution in this embodiment is as follows: Figure 3 As shown, in this embodiment, the mold is equipped with 9 hot nozzles and 284 injection cavities, allowing for the one-time molding of 284 product raw materials, and as... Figure 3 As shown, in this embodiment, the flow channels between the nine sets of injection nozzles 26 are separated, and the molding openings of the product mold cavity 29 are evenly distributed at its four corners. During the injection molding process, the molten injection plastic flows evenly into the four sets of thirty-two holes, so that each of the nine 284 cavities experiences the same pressure at the same time, forming a balanced flow channel distribution system design. This ensures that the molten plastic can be evenly and quickly filled into each injection station, guaranteeing the consistency of the quality of each pen barrel. The moving mold 2 in this embodiment includes an upper base plate assembly 21, which has mounting cavities 24. The mounting cavities 24 are as follows: Figure 2 The two plates located on the upper substrate group 21 are connected to form a structure. The main purpose of the material is for the injection molding material to be melted externally. The inlet of the injection hot nozzle 26 extends into the mounting cavity 24 to divert the material and allow it to enter the nine injection hot nozzles 26.

[0018] In this embodiment, a heating base plate 22 is provided on the moving mold 2. The heating base plate 22 is used to install an electric heating plate 25 for auxiliary heating of the moving mold 2. In this embodiment, a bottom heating plate 13 with the same principle and function and also equipped with an electric heating plate 25 is also provided in the fixed mold 1. The two are located above and below the product mold cavity 29, and can preheat and keep the mold warm. Their function includes, but is not limited to, preheating the mold, so as to avoid the local cooling of the injection molding material caused by the cold mold, which affects the appearance quality of the injection molded product.

[0019] In this embodiment, the hot nozzle base plate 23 is used to fix the front end of the injection hot nozzle 26. The fixed mold 1 includes a flow distribution base plate 11, on which a flow equalization plate 27 for distributing the injection plastic is provided. The hot nozzle base plate 23 and the flow equalization plate 27 of the flow distribution base plate 11 on the fixed mold 1 fit together to form an injection flow channel 28 when the mold is closed for injection molding. Figure 3 The flow channel shape on the flow equalization plate 27 is shown;

[0020] refer to Figure 2 The model base plate 12 shown in this embodiment includes a bottom hot plate 13 for mounting the heating plate 25, a first static mold layer 14 and a second static mold layer 15 with partial mold cavities. The flow distribution base plate 11, the first static mold layer 14, the second static mold layer 15 and the bottom hot plate 13 are used to form a complete product mold cavity 29, and all of them are provided with cooling channels 16. A mold closing guide post 17 is also provided in the lower base plate group 19. Fixed external fasteners 18 are provided on the outer sides of the fixed mold 1 and the moving mold 2.

[0021] As described above, the moving mold 2 and the fixed mold 1 in this embodiment are structurally composed of a mold cavity and various mating components made of stacked substrates. Furthermore, in terms of structural design, they have very unique design features. Even when disassembling and assembling, the fixed mold 1 and the moving mold 2 in this embodiment can be disassembled by removing the external fixing fasteners 18, thereby removing the restrictions on both. This allows for the disassembly and assembly of various substrates from both ends, facilitating mold disassembly and reducing mold maintenance time.

[0022] As a further feature of the above scheme, the hot nozzle base plate 23 is provided with nine injection hot nozzles 26, and the flow equalization plate 27 is provided with nine sets of injection flow channels 28 facing the nine injection hot nozzles 26. Each set of injection flow channels 28 corresponds to thirty-two product mold cavities 29 evenly distributed in four groups around the opening of the injection hot nozzles 26. The mold in this embodiment is designed with a balanced flow distribution system. Before manufacturing, the length, cross-section and other parameters of the flow channels are accurately calculated, and the mold structure is made by mirroring and arraying. This ensures that the molten plastic can be filled into each injection station evenly and quickly, ensuring the quality consistency of each pen barrel product in mass production.

[0023] As a further feature of the above solution, the injection nozzle 26 is provided with a conical residual material cavity 261, which is used to form a residual material rod for the mechanical clamping arm to remove material after injection molding.

[0024] As a further provision of the above scheme, the hot nozzle substrate 23 and the flow divider substrate 11 are also provided with a limiting slider 10 and a stroke member 20, which are used to limit the parting distance between the fixed mold 1 and the moving mold 2.

[0025] As a further feature of the above scheme, hooks 111 are also provided on the moving mold 2 and the fixed mold 1 respectively. The hooks 111 facilitate the suspension and transportation of the mold by the workers for disassembly and assembly.

[0026] This utility model's mold, with its multi-point independent station structure, is equipped with a complete and independent injection cavity and runner system for each station. It can produce 288 pen barrels in a single injection, significantly improving production efficiency. The 9-point hot runner design reduces pen barrel production costs and enhances economic benefits. Preliminary simulation analysis and experimental verification optimized the runner distribution system to ensure that molten plastic is evenly and quickly filled to each injection station, guaranteeing production quality. The mold also incorporates a cooling and heating system with cooling channels and heating elements. The runner distribution system and precise temperature control ensure consistent quality across all pen barrels. Furthermore, sensors can be installed within the mold, working in conjunction with a temperature controller to precisely control the mold temperature, thereby improving the stability and efficiency of the injection molding process.

[0027] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A pen barrel injection mold structure, comprising a fixed mold (1) and a moving mold (2), characterized in that, The moving mold (2) includes: an upper base plate assembly (21) with a mounting cavity (24); a heating base plate (22) for mounting a heating plate (25) for heating the moving mold (2); and a hot nozzle base plate (23) for fixing the front end of the injection hot nozzle (26). The fixed mold (1) includes: a flow distribution base plate (11) with a flow equalization plate (27) for distributing the injection plastic, the flow equalization plate (27) on the flow distribution base plate (11) and the hot nozzle base plate (23) forming an injection flow channel (28); and a mold base. The plate (12) and the model base plate (12) include a bottom hot plate (13) for mounting the electric heating plate (25), a static mold layer one (14) and a static mold layer two (15) with a partial mold cavity; the flow distribution plate (11), the static mold layer one (14), the static mold layer two (15) and the bottom hot plate (13) are used to form a complete product mold cavity (29), and all of them are provided with cooling channels (16); the lower base plate group (19) is provided with mold closing guide pillars (17); the fixed mold (1) and the moving mold (2) are both provided with fixed external fasteners (18).

2. The pen barrel injection mold structure according to claim 1, characterized in that: Nine injection hot nozzles (26) are provided on the hot nozzle base plate (23). The flow equalization plate (27) is provided with nine sets of injection flow channels (28) in front of the nine injection hot nozzles (26). Each set of injection flow channels (28) corresponds to thirty-two product mold cavities (29) that are evenly distributed in four groups around the opening of the injection hot nozzles (26).

3. The pen barrel injection mold structure according to claim 2, characterized in that: The injection nozzle (26) is provided with a conical residual material cavity (261), which is used to form a residual material rod for the mechanical clamp arm to unload and pick up after injection molding.

4. The pen barrel injection mold structure according to claim 1, characterized in that: The hot nozzle substrate (23) and the flow divider substrate (11) are also provided with a limiting slider (10) and a stroke member (20), which are used to limit the parting distance between the fixed mold (1) and the moving mold (2).

5. The pen barrel injection mold structure according to claim 1, characterized in that: The moving mold (2) and the fixed mold (1) are also provided with hooks (111).

Images