Map bag air-assisted forming injection mechanism and mold

Abstract

The utility model discloses a map bag gas supplementary forming injection mechanism and mould relates to injection moulding technical field. The mechanism includes the structure of core pulling of material overflow and blow structure: the structure of core pulling of material overflow contains material overflow groove and core pulling, and the material overflow groove corresponds product forming portion and is located its end one side, and the core pulling is connected with mould inside sliding, and one end extends to material overflow groove, and the sliding can realize that material overflow groove is closed or opens, blow structure contains gas path subassembly and blow subassembly, and the gas path subassembly gas inlet end is connected with external gas supply subassembly, and the gas outlet end is connected with blow subassembly, and the blow subassembly gas outlet end is located in the forming portion and is away from material overflow groove one end, and with material overflow groove forms the passage of the inside of forming portion. The utility model forms the hollow structure to the forming portion through the communication passage, guarantees the bearing capacity and reduces raw material, reduces product weight, and accords with the light weight trend of car, and helps control material purchase cost.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a map bag air-assisted injection molding mechanism. Background Technology

[0002] In the current process of social development, the automotive industry, as an important pillar of the national economy, is accelerating its transformation towards high efficiency, energy conservation, and lightweighting. On the one hand, with the continuous innovation of mold manufacturing technology, the production precision and efficiency of automotive parts have been significantly improved; on the other hand, the total amount of global resources is constantly decreasing, and the pressure of environmental protection and cost control is becoming increasingly prominent. This makes minimizing raw material consumption and achieving product lightweighting, while ensuring that the core performance and quality of products meet standards, a core development trend in the field of automotive product design and manufacturing, and a key breakthrough direction for companies in the industry to enhance their market competitiveness.

[0003] As a crucial functional component of automotive interior systems, the car map pocket needs to withstand the load of placed items over extended periods, thus requiring high structural strength. To meet this strength requirement, traditional designs often necessitate thicker local wall sections to ensure stability and durability during use. However, this thick-walled design has several unavoidable technical drawbacks: First, the increased wall thickness directly leads to a rise in overall product weight, contradicting the automotive industry's trend towards lightweighting, and significantly increases raw material usage, resulting in severe material waste. Second, during injection molding, the uneven melt cooling rate of the thick-walled structure makes the product surface highly susceptible to severe shrinkage defects, preventing it from meeting the stringent standards of automotive interiors and impacting market acceptance. Third, uneven wall thickness causes significant internal stress during molding and cooling, leading to product deformation, increased defect rates, and difficulty in ensuring dimensional accuracy and assembly performance. Finally, the thick-walled structure requires longer injection holding and cooling times, significantly extending the product's molding cycle, reducing production efficiency, and increasing equipment energy consumption and labor costs, resulting in a serious waste of injection molding production costs.

[0004] Taking the production of existing automotive map bag products as an example, these products are mostly injection molded from ABS material. To meet strength requirements, the length of the gas-assisted molding section reaches 355mm, with some areas having a wall thickness of approximately 10mm. This thick-walled design not only leads to a large consumption of raw materials, increasing the product's material cost, but also further exacerbates production cost waste due to the excessively long molding cycle. Furthermore, issues such as shrinkage and deformation remain prominent, making it difficult to meet the automotive industry's dual requirements for product quality and production efficiency. Therefore, how to solve the problems of material waste, appearance defects, deformation risks, and excessive costs caused by the thick-walled design in the molding process of automotive map bags has become a pressing technical challenge in the current mold manufacturing field. Utility Model Content

[0005] To address one of the shortcomings of existing technologies, this utility model provides a map bag air-assisted molding injection molding mechanism, solving the production problem of map bags for automobiles.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a map bag air-assisted injection molding mechanism, comprising: The overflow core-pulling structure includes an overflow groove and a core puller. The overflow groove is provided corresponding to the molding part of the product and is located on one side of the end of the molding part. The core puller is slidably connected to the internal structure of the mold. One end of the core puller extends into the overflow groove. After the core puller slides and changes position, the overflow groove can be closed or opened. The air blowing structure includes an air passage assembly and an air blowing assembly. The air inlet of the air passage assembly is connected to the air outlet of an external air supply assembly, and the air outlet of the air passage assembly is connected to the air inlet of the air blowing assembly. The air outlet of the air blowing assembly is located at the end of the molding section of the product away from the overflow groove. The air outlet of the air blowing assembly and the overflow groove form a passage connecting the interior of the corresponding molding part.

[0007] Preferably, the overflow core-pulling structure further includes: The driving component is a retractable cylinder structure. The outer side of the cylinder of the driving component is fixedly connected to the internal structure of the mold, and the movable end of the driving component is linked with the core pulling mechanism.

[0008] Preferably, the overflow core-pulling structure further includes: A linkage component is disposed between the driving component and the core puller. The movable end of the driving component is linked with the core puller through the linkage component. The direction of movement of the movable end of the driving component is taken as direction A, and the direction of movement of the core puller is taken as direction B. Directions A and B are perpendicular.

[0009] Preferably, the linkage component includes: The linkage rod is a straight rod, and the axis of its rod body is parallel to the direction of movement of the movable end of the driving component; one end of the linkage rod is detachably connected to the movable end of the driving component, and the linkage rod can move synchronously with the movable end of the driving component. The first linkage component is located at the end of the linkage rod away from the driving component, and the first linkage component and the linkage rod are detachably connected; the first linkage component has an inclined linkage groove. The second linkage component has one end slidably connected to the first linkage component through the linkage groove, and the other end is detachably connected to the core puller. The first linkage and the second linkage are slidably connected to the internal structure of the mold, with the sliding direction of the first linkage being direction A and the sliding direction of the second linkage being direction B.

[0010] Preferably, the overflow core-pulling structure further includes: A positioning component is disposed on one side of the first linkage component, and the positioning component is in contact with the first linkage component; the positioning component is a straight plate, and its plate extension direction is parallel to direction A; A limiting component is disposed between the first linkage component and the driving component. The limiting component is fixedly connected to the internal structure of the mold and can limit the first linkage component.

[0011] Preferably, the outer walls of the first linkage and the second linkage are respectively provided with oil groove groups, the oil groove group is composed of several oil grooves arranged in parallel, the oil grooves are annular grooves, and the oil grooves in the same oil groove group are interconnected.

[0012] Preferably, the overflow trough includes: The first connecting part is connected to the molding area of ​​the molding part of the corresponding product in the mold; and the first connecting part serves as a gate structure on one side of the molding part. The second connecting portion is disposed on the side of the first connecting portion away from the forming portion; The core puller is a round rod, which can be inserted between the first connecting part and the second connecting part.

[0013] Preferably, the air path assembly of the blowing structure includes: Nitrogen auxiliary equipment, as a gas supply source for gas circuit components, can supply nitrogen; The pipeline is connected to the air inlet and the air outlet of the nitrogen auxiliary equipment, and the air outlet is connected to the air blowing assembly. A solenoid valve, installed on the pipeline, can switch the on or off state of the gas supply inside the pipeline.

[0014] Preferably, the air blowing assembly of the air blowing structure includes: The insert is fixedly connected to the internal structure of the mold, and a groove is provided on one side of the insert corresponding to the forming part of the product; a through hole is provided on the block body of the insert to connect with the groove. The air needle is connected to the pipeline of the air circuit assembly; the air needle is inserted into the through hole of the insert. A sealing element is fitted between the air needle and the through hole of the insert. The sealing element has a cylindrical structure, and one end of the sealing element extends into the groove of the insert.

[0015] An injection mold that uses a map bag air-assisted molding injection mechanism as described above.

[0016] Compared with the prior art, it has the following advantages: The air-assisted molding injection mechanism for map bags in this application uses the communication channel between the air blowing component and the overflow groove to inject gas into the product molding part to form a reasonable hollow structure. While ensuring the core load-bearing performance, it significantly reduces the amount of raw materials used and the weight of the product, which is in line with the trend of automotive lightweighting and helps to control material procurement costs.

[0017] The hollow structure of the molding section ensures uniform wall thickness, resulting in consistent melt cooling rates and reduced internal stress during molding and cooling. This significantly improves the smoothness and dimensional accuracy of the product, meeting automotive interior quality standards and enhancing market acceptance. The hollow structure also shortens melt filling and cooling time. Combined with the overflow core-pulling structure, it allows for rapid opening and closing of the overflow channel and removal of excess melt, further optimizing the injection molding process, shortening the molding cycle, improving production efficiency, and helping companies increase capacity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a map bag product according to an embodiment of this application; Figure 2 This is a front view of the map bag product according to an embodiment of this application; Figure 3 for Figure 2 AA cross-section view; Figure 4 This is a schematic diagram of the injection molding mechanism structure according to an embodiment of this application. Figure 1 ; Figure 5 This is a schematic diagram of the injection molding mechanism structure according to an embodiment of this application. Figure 2 ; Figure 6 for Figure 5 A magnified view of part A; Figure 7 This is a schematic diagram of the overflow core-pulling structure in an embodiment of this application. Figure 1 ; Figure 8 This is a schematic diagram of the overflow core-pulling structure in an embodiment of this application. Figure 2 ; Figure 9 This is a schematic diagram of the air blowing assembly structure according to an embodiment of this application. Figure 1 ; Figure 10 This is a schematic diagram of the air blowing assembly structure according to an embodiment of this application. Figure 2.

[0019] In the picture: 100. Product; 101. Molding Department; 1. Overflow core-pulling structure; 11. Overflow groove; 12. Core-pulling; 13. Driving component; 14. Linkage assembly; 141. Linkage rod; 142. First linkage component; 143. Second linkage component; 15. Positioning component; 16. Limiting component; 2. Air blowing structure; 21. Air path assembly; 22. Air blowing assembly; 221. Insert; 222. Air needle; 223. Seal. Detailed Implementation

[0020] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Please see Figures 1-3 The illustration shows the product 100 that can be processed by the injection molding mechanism of this application, especially the structure of the molding part 101.

[0022] Please see Figures 4 to 10 This application provides the following technical solutions: A map bag air-assisted injection molding mechanism includes an overflow core-pulling structure 1 and an air-blowing structure 2. The overflow core-pulling structure 1 includes an overflow groove 11 and a core puller 12. The overflow groove 11 is located on one end side of the molding part 101 of the product 100. The core puller 12 is slidably connected to the internal structure of the mold. One end of the core puller 12 extends into the overflow groove 11. Changing the position of the core puller 12 allows the overflow groove 11 to be closed or opened. The air-blowing structure 2 includes an air passage assembly 21 and an air-blowing assembly 22. The air inlet of the air passage assembly 21 is connected to the air outlet of an external air supply assembly, and the air outlet of the air passage assembly 21 is connected to the air inlet of the air-blowing assembly 22. The air outlet of the air-blowing assembly 22 is located at the end of the molding part 101 of the product 100 away from the overflow groove. A passage is formed between the air outlet of the air-blowing assembly 22 and the overflow groove 11, corresponding to the internal structure of the molding part 101.

[0023] The movement of the core puller 12 controls the connection or closure of the overflow groove 11. After the core puller 12 moves to open the overflow groove 11, the air blowing component 22 blows air towards the position corresponding to the molding part 101 inside the mold. During the gas filling, the uncured plastic material is filled into the overflow groove 11, which facilitates the molding of the molding part 101.

[0024] Based on the above implementation scheme, the overflow core-pulling structure 1 also includes a driving component 13. The driving component 13 is a hydraulic cylinder, and the outer side of the cylinder body of the driving component 13 is fixedly connected to the internal structure of the mold. The movable end of the driving component 13 is linked with the core-pulling 12 through the linkage assembly 14. The direction of movement of the movable end of the driving component 13 is taken as direction A, and the direction of movement of the core-pulling 12 is taken as direction B. Direction A and direction B are perpendicular.

[0025] The linkage assembly 14 includes a linkage rod 141, a first linkage member 142, a second linkage member 143, a positioning member 15, and a limiting member 16. The linkage rod 141 is a straight rod, with its axis parallel to the direction of movement of the movable end of the driving member 13. One end of the linkage rod 141 is detachably connected to the movable end of the driving member 13, and the linkage rod 141 can move synchronously with the movable end of the driving member 13. The first linkage member 142 is located at the end of the linkage rod 141 away from the driving member 13, and the first linkage member 142 and the linkage rod 141 are detachably connected. An inclined linkage groove is formed on the first linkage member 142. One end of the second linkage member 143 is slidably connected to the first linkage member 142 through the linkage groove, and the other end is detachably connected to the core-pulling 12. The first linkage member 142 and the second linkage member 143 are slidably connected to the internal structure of the mold, with the sliding direction of the first linkage member 142 being direction A and the sliding direction of the second linkage member 143 being direction B. A positioning element 15 is disposed on one side of the first linkage element 142, and the positioning element 15 is in contact with the first linkage element 142; the positioning element 15 is a straight plate, and its extension direction is parallel to direction A. A limiting element 16 is disposed between the first linkage element 142 and the driving element 13, and the limiting element 16 is fixedly connected to the internal structure of the mold, and the limiting element 16 can limit the first linkage element 142. The limiting element 16 is a "U"-shaped block.

[0026] In addition, the connection between the linkage rod 141 and the first linkage member 142, the connection between the first linkage member 142 and the second linkage member 143, and the connection between the core puller 12 and the second linkage member 143 all adopt a sliding connection form of T-slot and T-block.

[0027] The T-slots and T-blocks at the connection points of the linkage rod 141 and the first linkage member 142, as well as the connection points of the core puller 12 and the second linkage member 143, have sliding directions perpendicular to the movement directions of the corresponding components. That is, the T-slots and T-blocks at these two locations are only used as structural connections between components to ensure that the components will not separate during daily use.

[0028] In addition to ensuring that the first linkage 142 and the second linkage 143 do not separate, the connection point also serves as a guide structure for the linkage action of the first linkage 142 and the second linkage 143.

[0029] Based on the above implementation scheme, the outer walls of the first linkage member 142 and the second linkage member 143 are respectively provided with oil groove groups. The oil groove group consists of several oil grooves arranged in parallel. The oil grooves are annular grooves, and the oil grooves in the same oil groove group are interconnected.

[0030] Based on the above implementation plan, see Figure 6 The overflow groove 11 includes a first connecting portion and a second connecting portion. The first connecting portion is connected to the molding area of ​​the molding part 101 corresponding to the product 100 in the mold; and the first connecting portion serves as a gate structure on one side of the molding part 101. The second connecting portion is located on the side of the first connecting portion away from the molding part 101.

[0031] For ease of explanation, Figure 6 The directions shown are for reference only. The first connecting part is a "door" shaped structure, including a horizontal part at the top and vertical parts on both sides of the horizontal part. The bottom end of the vertical part near the product 100 is connected to the forming part 101, and the bottom end of this vertical part is a variable diameter structure, with the outer diameter of the end near the product 100 being minimized as much as possible. The bottom of the other vertical part is connected to the second connecting part. The middle position of the horizontal part is a bent structure, and both ends of the horizontal part are connected to the two vertical parts respectively. The second connecting part has multiple bent structures. It should be noted that the overflow groove 11 shown in the attached figure is actually an overflow shape. Because the overflow groove 11 is a slotted structure, it is difficult to directly show it from the attached figure. Therefore, the groove structure of the overflow groove 11 is represented by the overflow shape. The core puller 12 is a round rod that can be inserted between the first connecting part and the second connecting part.

[0032] Based on the above implementation scheme, the air circuit component 21 of the blowing structure 2 includes a nitrogen auxiliary equipment, pipelines, and solenoid valves. The nitrogen auxiliary equipment serves as the air supply source for the air circuit component 21, supplying nitrogen during injection molding. The inlet end of the pipeline is connected to the outlet end of the nitrogen auxiliary equipment, and the outlet end is connected to the blowing component 22. Solenoid valves are installed on the pipeline, and multiple valves can be installed as needed to switch the on or off state of the internal air supply of the pipeline.

[0033] See Figure 9 and Figure 10 The air blowing assembly 22 of the air blowing structure 2 includes an insert 221, an air needle 222, and a seal 223. The insert 221 is fixedly connected to the internal structure of the mold, and a groove is opened on one side of the insert 221 corresponding to the forming part 101 of the product 100. A through hole is opened on the block of the insert 221 to connect with the groove. The air needle 222 is connected to the pipeline of the air circuit assembly 21. The air needle 222 is inserted into the through hole of the insert 221. The seal 223 is sleeved between the air needle 222 and the through hole of the insert 221. The seal 223 has a cylindrical structure, and one end of the seal 223 extends into the groove of the insert 221.

[0034] After the mold closes, injection begins. Once product 100 is fully filled, the drive component 13, under the action of the injection molding machine's hydraulic system, moves the core puller 12, opening the overflow groove 11. Simultaneously, the solenoid valve opens, initiating air blowing. Gas passes through the air needle 222 and fills the gas-assisted molding section of product 100. During gas filling, uncured plastic material is deposited into the overflow groove 11. When the overflow shape is formed, the drive component 13, under the action of the injection molding machine's hydraulic system, moves the core puller 12 back to its original position, closing the overflow groove 11. After the overflow groove 11 closes, gas continuously maintains pressure on product 100 until it is completely solidified. Once product 100 has solidified, the solenoid valve closes, and the gas pressure maintenance stops. After cooling, the injection molding machine opens the mold and ejects the product 100 and the overflow shape from the overflow groove 11, starting the next cycle.

[0035] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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, and therefore should not be construed as a limitation of this application.

[0036] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0039] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0040] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A map pocket gas-assisted injection molding mechanism characterized by comprising: include: The overflow core-pulling structure includes an overflow groove and a core-pulling mechanism. The overflow groove is provided for the molding part of the product and is located on one side of the end of the molding part. The core puller is slidably connected to the internal structure of the mold; and one end of the core puller extends into the overflow groove. After the core puller slides and changes position, the overflow groove can be closed or opened. The air blowing structure includes an air passage assembly and an air blowing assembly. The air inlet of the air passage assembly is connected to the air outlet of an external air supply assembly, and the air outlet of the air passage assembly is connected to the air inlet of the air blowing assembly. The air outlet of the air blowing assembly is located at the end of the molding section of the product away from the overflow groove. The air outlet of the air blowing assembly and the overflow groove form a passage connecting the interior of the corresponding molding part.

2. The map bag air-assisted molding injection molding mechanism as described in claim 1, characterized in that, The overflow core-pulling structure also includes: The driving component is a telescopic cylinder structure. The outer side of the cylinder of the driving component is fixedly connected to the internal structure of the mold, and the movable end of the driving component is linked with the core pulling mechanism.

3. The map pocket gas assist injection molding mechanism of claim 2, wherein, The overflow core-pulling structure also includes: A linkage component is disposed between the driving component and the core puller. The movable end of the driving component is linked with the core puller through the linkage component. The direction of movement of the movable end of the driving component is taken as direction A, and the direction of movement of the core puller is taken as direction B. Directions A and B are perpendicular.

4. The map pocket gas assist injection molding mechanism of claim 3, wherein, The linkage component includes: The linkage rod is a straight rod, and the axis of its rod body is parallel to the direction of movement of the movable end of the driving component; one end of the linkage rod is detachably connected to the movable end of the driving component, and the linkage rod can move synchronously with the movable end of the driving component. The first linkage component is located at the end of the linkage rod away from the driving component, and the first linkage component and the linkage rod are detachably connected; the first linkage component has an inclined linkage groove. The second linkage component has one end slidably connected to the first linkage component through the linkage groove, and the other end is detachably connected to the core puller. The first linkage and the second linkage are slidably connected to the internal structure of the mold, with the sliding direction of the first linkage being direction A and the sliding direction of the second linkage being direction B.

5. The air-assisted injection molding mechanism for map bags as described in claim 4, characterized in that, The overflow core-pulling structure also includes: A positioning component is disposed on one side of the first linkage component, and the positioning component is in contact with the first linkage component; the positioning component is a straight plate, and its plate extension direction is parallel to direction A; A limiting component is disposed between the first linkage component and the driving component. The limiting component is fixedly connected to the internal structure of the mold and can limit the first linkage component.

6. The map bag air-assisted molding injection mechanism as described in claim 5, characterized in that, The first linkage and the second linkage are respectively provided with oil groove groups on their outer walls. The oil groove group consists of several oil grooves arranged in parallel. The oil grooves are annular grooves, and the oil grooves in the same oil groove group are interconnected.

7. The map bag air-assisted molding injection molding mechanism as described in claim 1, characterized in that, The overflow trough includes: The first connecting part is connected to the molding area of ​​the molding part of the corresponding product in the mold; and the first connecting part serves as a gate structure on one side of the molding part. The second connecting portion is disposed on the side of the first connecting portion away from the forming portion; The core puller is a round rod, which can be inserted between the first connecting part and the second connecting part.

8. The air-assisted injection molding mechanism for map bags as described in claim 1, characterized in that, The air passage components of the blowing structure include: Nitrogen auxiliary equipment, as a gas supply source for gas circuit components, can supply nitrogen; The pipeline is connected to the air inlet and the air outlet of the nitrogen auxiliary equipment, and the air outlet is connected to the air blowing assembly. A solenoid valve, installed on the pipeline, can switch the on or off state of the gas supply inside the pipeline.

9. The air-assisted injection molding mechanism for map bags as described in claim 8, characterized in that, The air blowing assembly of the air blowing structure includes: The insert is fixedly connected to the internal structure of the mold, and a groove is provided on one side of the insert corresponding to the forming part of the product; a through hole is provided on the block body of the insert to connect with the groove. The air needle is connected to the pipeline of the air circuit assembly; the air needle is inserted into the through hole of the insert. A sealing element is fitted between the air needle and the through hole of the insert. The sealing element has a cylindrical structure, and one end of the sealing element extends into the groove of the insert.

10. A mold, characterized in that, Use the air-assisted injection molding mechanism for map bags as described in any one of claims 1-9.

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