Storage cover forming injection mold

Abstract

This utility model relates to the field of injection mold technology and discloses a storage lid forming injection mold, including a worktable. A lower mold is fixedly installed on the top of the worktable, a storage lid body is provided on the top of the lower mold, an upper mold is provided on the top of the storage lid body, a lifting platform is fixedly installed on the top of the upper mold, and an installation plate is fixedly installed on the top of the worktable. An injection molding mechanism is provided on the outer side of the installation plate. This storage lid forming injection mold, through its cooling device, not only effectively shortens the cooling and molding time of the storage lid but also avoids quality problems such as deformation and warping caused by uneven cooling, significantly improving the product qualification rate. The demolding device enables flexible clamping and smooth demolding of the storage lid, avoiding scratches and damage to the surface of the storage lid during demolding and ensuring the complete and smooth demolding of the storage lid, reducing the scrap rate and improving the degree of production automation.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for forming storage lids. Background Technology

[0002] In the field of plastic product manufacturing, injection molding has become one of the most widely used manufacturing processes due to its high efficiency, precision, and scalability. This process involves injecting molten plastic raw materials into a mold cavity, which is then cooled and solidified to obtain the molded product. It is particularly suitable for manufacturing products with complex shapes and high precision requirements. Taking the production of storage lids as an example, injection molding can realize personalized structural designs, such as the one-piece molding of functional structures like threaded seals and snap-fit ​​connections, while ensuring dimensional consistency and surface finish in mass production. Therefore, it occupies a dominant position in many niche markets such as daily necessities, food packaging, and industrial containers.

[0003] Currently, cooling devices often employ a simple, linear cooling water pipe layout. This results in limited contact area between the cooling water pipes and the storage lid, and a single flow path for the cooling medium. Consequently, the cooling rate of the storage lid is slow, and uneven cooling is frequent. Localized excessively fast or slow cooling can easily lead to quality defects such as deformation and warping of the storage lid. This not only increases the scrap rate and extends the production cycle but also fails to meet the demands of large-scale, high-efficiency industrial production. Furthermore, the demolding process can easily cause scratches and damage to the surface of the storage lid, especially for storage lids with high surface precision requirements, significantly impacting the product's appearance and performance. Therefore, we propose an injection mold for storage lid molding. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides an injection mold for molding storage lids, which has the advantages of uniform cooling of storage lids, efficient demolding, and time and labor saving. It solves the problems of uneven cooling and inconvenient demolding in the existing technology for molding storage lids.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A storage lid injection mold includes a worktable, a lower mold fixedly mounted on the top of the worktable, a storage lid body mounted on the top of the lower mold, an upper mold mounted on the top of the storage lid body, a lifting platform fixedly mounted on the top of the upper mold, a guide rail fixedly mounted on the top of the worktable, a guide rod fixedly mounted on the top of the worktable, and an installation plate fixedly mounted on the top of the worktable. An injection molding mechanism is located on the outer side of the installation plate. The injection molding mechanism includes a cooling device and a demolding device. The cooling device rapidly cools the storage lid before activating the demolding device to demold the storage lid.

[0006] Preferably, the demolding device includes a first mounting base, which is mounted on the outside of the mounting plate. A first snap-fit ​​post is fixedly mounted on the outside of the first mounting base. A second mounting base is fixedly mounted on the outside of the mounting plate. A second snap-fit ​​groove is formed on the outside of the second mounting base. A fixing frame is fixedly mounted on the top of the second mounting base. An electric cylinder is fixedly mounted on the top of the second mounting base. A telescopic rod is fixedly mounted on the movable end of the electric cylinder. A clamping pad is fixedly mounted on the end of the telescopic rod away from the electric cylinder. An upper demolding pad is fixedly mounted on the outside of the clamping pad. An elastic spring is fixedly mounted on the bottom of the upper demolding pad. A lower demolding pad is fixedly mounted on the bottom of the elastic spring.

[0007] Preferably, the cooling device includes a connecting block 1, which is installed on the outside of the mounting base 1. A snap-fit ​​groove 1 is provided on the outside of the connecting block 1. A cooling water pipe is connected through the outside of the connecting block 1. A connecting block 2 is connected through the end of the cooling water pipe away from the connecting block 1. A snap-fit ​​post 2 is fixedly installed on the outside of the connecting block 2.

[0008] Preferably, the size of the first snap-fit ​​post is the same as that of the second snap-fit ​​post, the diameter of the first snap-fit ​​groove is the same as that of the second snap-fit ​​groove, and the lifting platform, guide rail, and guide rod are all slidably connected.

[0009] Preferably, the first snap-fit ​​post is adapted to the first snap-fit ​​groove, the second snap-fit ​​post is adapted to the second snap-fit ​​groove, and the cooling water pipe has a spiral structure.

[0010] Preferably, the first connecting block, the first snap-fit ​​groove, the cooling water pipe, the second connecting block, and the second snap-fit ​​post are provided in two identical sets, and the two sets of the first connecting block, the first snap-fit ​​groove, the cooling water pipe, the second connecting block, and the second snap-fit ​​post are symmetrically distributed about the vertical center line of the second mounting base.

[0011] Preferably, the size of the first mounting base and the second mounting base are the same, and the upper demolding pad and the lower demolding pad are the same.

[0012] Compared with the prior art, the present invention provides an injection mold for forming storage lids, which has the following beneficial effects: 1. This storage lid injection mold, through its cooling device, features a spiral-shaped cooling water pipe that significantly increases the contact area with the storage lid. Combined with two symmetrically distributed connecting blocks, a snap-fit ​​structure, and the cooling water pipe, it achieves rapid and uniform cooling of the storage lid. This not only effectively shortens the cooling and molding time of the storage lid but also avoids quality problems such as deformation and warping caused by uneven cooling, significantly improving the product qualification rate and meeting the high-efficiency requirements of large-scale industrial production. Furthermore, it facilitates the installation, disassembly, and maintenance of the device and allows for flexible replacement or upgrading according to different production needs, improving the mold's versatility and service life.

[0013] 2. This storage lid injection mold, through its set demolding device, uses an electric cylinder to drive a telescopic rod, which in turn moves the clamping pad, upper demolding pad, and lower demolding pad. Combined with an elastic spring, this achieves flexible clamping and smooth demolding of the storage lid. This avoids scratches and damage to the surface of the storage lid during demolding, ensures the lid is completely and smoothly demolded, reduces the scrap rate, decreases the workload of manual demolding assistance, improves the degree of production automation, provides precise guidance and stable support, and guarantees the accuracy of the upper and lower mold closing during injection molding, resulting in more accurate dimensions of the storage lid. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the interaction between the guide rail and the guide rod of this utility model. Figure 3 This is a schematic diagram of the interaction between the lower mold and the storage cover body of this utility model. Figure 4 This is a schematic diagram of the injection molding mechanism of this utility model; Figure 5 This is a schematic diagram of the disassembled structure of the injection molding mechanism of this utility model; Figure 6 This is a schematic diagram of the structure in which the elastic spring and the lower demolding pad of this utility model cooperate.

[0015] The components include: 1. Workbench; 2. Lower mold; 3. Storage cover body; 4. Upper mold; 5. Lifting platform; 6. Guide rail; 7. Guide rod; 8. Mounting plate; 9. Injection mechanism; 901. Mounting seat one; 902. Snap-fit ​​post one; 903. Connecting block one; 904. Snap-fit ​​groove one; 905. Cooling water pipe; 906. Connecting block two; 907. Snap-fit ​​post two; 908. Mounting seat two; 909. Snap-fit ​​groove two; 910. Fixing frame; 911. Electric cylinder; 912. Telescopic rod; 913. Clamping pad; 914. Upper demolding pad; 915. Elastic spring; 916. Lower demolding pad. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-6 The storage lid molding injection mold includes a worktable 1, a lower mold 2 fixedly installed on the top of the worktable 1, a storage lid body 3 set on the top of the lower mold 2, an upper mold 4 set on the top of the storage lid body 3, a lifting platform 5 fixedly installed on the top of the upper mold 4, a guide rail 6 fixedly installed on the top of the worktable 1, a guide rod 7 fixedly installed on the top of the worktable 1, an installation plate 8 fixedly installed on the top of the worktable 1, and an injection molding mechanism 9 set on the outside of the installation plate 8. The injection molding mechanism 9 includes a cooling device and a demolding device. After the cooling device rapidly cools the storage lid, the demolding device is activated to demold the storage lid.

[0018] In this embodiment, the demolding device includes a mounting base 901, which is installed on the outside of the mounting plate 8. A snap-fit ​​post 902 is fixedly installed on the outside of the mounting base 901. A second mounting base 908 is fixedly installed on the outside of the mounting plate 8. A snap-fit ​​groove 909 is opened on the outside of the second mounting base 908. A fixing frame 910 is fixedly installed on the top of the second mounting base 908. An electric cylinder 911 is fixedly installed on the top of the second mounting base 908. A telescopic rod 912 is fixedly installed on the movable end of the electric cylinder 911. A clamping pad 913 is fixedly installed on the end of the telescopic rod 912 away from the electric cylinder 911. An upper demolding pad 914 is fixedly installed on the outside of the clamping pad 913. An elastic spring 915 is fixedly installed on the bottom of the upper demolding pad 914. A lower demolding pad 916 is fixedly installed on the bottom of the elastic spring 915. The demolding device, driven by an electric cylinder 911, moves the telescopic rod 912, which in turn moves the clamping pad 913, the upper demolding pad 914, and the lower demolding pad 916. In conjunction with the elastic spring 915, it achieves flexible clamping and smooth demolding of the storage lid. This not only avoids scratching or damage to the surface of the storage lid during demolding, but also ensures that the storage lid is demolded intact and smoothly, reducing the scrap rate. At the same time, it reduces the workload of manual demolding assistance, improves the degree of production automation, provides precise guidance and stable support, and ensures the accuracy of the mold closing of the upper mold 4 and the lower mold 2 during injection molding, making the molded dimensions of the storage lid more accurate.

[0019] Furthermore, the cooling device includes a connecting block 903, which is installed on the outside of the mounting base 901. A snap-fit ​​groove 904 is formed on the outside of the connecting block 903, and a cooling water pipe 905 is connected through it. A connecting block 906 is connected to the end of the cooling water pipe 905 away from the connecting block 903, and a snap-fit ​​post 907 is fixedly installed on the outside of the connecting block 906. Through this cooling device, the spiral-shaped cooling water pipe 905 significantly increases the contact area with the storage lid. Combined with two symmetrically distributed connecting blocks, snap-fit ​​structures, and cooling water pipes 905, rapid and uniform cooling of the storage lid is achieved. This not only effectively shortens the cooling and molding time of the storage lid but also avoids quality problems such as deformation and warping caused by uneven cooling, significantly improving the product qualification rate and meeting the high-efficiency requirements of large-scale industrial production. It not only facilitates the installation, disassembly, and maintenance of the device but also allows for flexible replacement or upgrading of the device according to different production needs, improving the versatility and service life of the mold.

[0020] Furthermore, the dimensions of the first snap-fit ​​post 902 are consistent with those of the second snap-fit ​​post 907, and the diameter of the first snap-fit ​​groove 904 is consistent with that of the second snap-fit ​​groove 909. The lifting platform 5 is slidably connected to the guide rail 6 and the guide rod 7. By designing the cooling water pipe 905 as a spiral structure, the contact area between the cooling water pipe 905 and the storage lid is greatly increased, allowing the cooling medium to exchange heat more fully with the storage lid. At the same time, the two sets of symmetrically distributed connecting blocks, snap-fit ​​structures, and cooling water pipes 905 can evenly distribute the cooling medium around the storage lid, enabling rapid and uniform cooling of the storage lid. This not only effectively shortens the cooling and molding time of the storage lid but also avoids quality problems such as deformation and warping caused by uneven cooling, significantly improving the product qualification rate. The sliding connection between the lifting platform 5 and the guide rail 6 and guide rod 7 can provide precise guidance and stable support for the lifting of the upper mold 4 during the injection molding process, ensuring the accuracy of the mold closing of the upper mold 4 and the lower mold 2, and making the molding dimensions of the storage lid more accurate.

[0021] Furthermore, snap-fit ​​post 902 is compatible with snap-fit ​​groove 904, snap-fit ​​post 907 is compatible with snap-fit ​​groove 909, and the cooling water pipe 905 has a spiral structure. This snap-fit ​​structure ensures the stability of the connection between the cooling device and the demolding device, preventing loosening of the device due to vibration or other factors during injection molding; the spiral cooling water pipe 905 further enhances the cooling effect and improves cooling efficiency.

[0022] In addition, two identical sets of connecting block 903, snap-fit ​​groove 904, cooling water pipe 905, connecting block 906, and snap-fit ​​post 907 are provided, and the two sets of connecting block 903, snap-fit ​​groove 904, cooling water pipe 905, connecting block 906, and snap-fit ​​post 907 are symmetrically distributed about the vertical center line of mounting base 908. This symmetrical design ensures that the storage lid is subjected to more even force during cooling, preventing deformation due to excessively fast or slow cooling on one side. It also allows the demolding device to apply a more balanced force to the storage lid during demolding, ensuring the storage lid is demolded intact and smoothly.

[0023] It is worth noting that the dimensions of mounting base 1 901 and mounting base 2 908 are the same, and the upper demolding pad 914 and lower demolding pad 916 are also identical. This identical mounting base design facilitates the layout and installation of the cooling device and demolding device on the mounting plate 8, making the overall structure more compact and rational. The identical upper and lower demolding pads 914 and 916 provide consistent friction and cushioning during demolding, ensuring the stability and reliability of the demolding action.

[0024] During use, the operator places the workbench 1 stably on the work area, ensuring it is level and stable without wobbling. The lower mold 2 is precisely installed on top of the workbench 1 using bolts or other fixing methods, ensuring its accurate positioning and perpendicularity to the workbench 1, laying the foundation for subsequent injection molding. Guide rails 6 and guide rods 7 are installed on top of the workbench 1, parallel to and perpendicular to the workbench 1 surface. The lifting platform 5 is then installed on top of the upper mold 4, slidingly connected to the guide rails 6 and guide rods 7, ensuring the upper mold 4 can move smoothly and vertically along the guide rails 6 and guide rods 7, guaranteeing the accuracy of mold closing during injection molding. The operator then secures the mounting plate 8 to a suitable position on top of the workbench 1 and installs the demolding device. Mounting base 901 is installed on the outside of mounting plate 8, so that snap-fit ​​post 902 faces the appropriate direction. Then, mounting base 908 is fixedly installed on the corresponding position on the outside of mounting plate 8, ensuring that snap-fit ​​groove 909 corresponds to snap-fit ​​post 902. Next, mounting bracket 910 is installed on the top of mounting base 908, and electric cylinder 911 is installed on mounting bracket 910, so that the movable end of electric cylinder 911 is connected to telescopic rod 912. Finally, clamping pad 913, upper demolding pad 914, elastic spring 915 and lower demolding pad 916 are installed in sequence on the end of telescopic rod 912 away from electric cylinder 911 to complete the installation of demolding device. Connecting block 903 is installed on the outside of mounting base 901, so that snap-fit ​​groove 904 corresponds to snap-fit ​​post 902. One end of cooling water pipe 905 is connected through to the outside of connecting block 903.Next, connect the connecting block 2 906 to the end of the cooling water pipe 905 furthest from the connecting block 1 903, and align the snap-fit ​​post 2 907 with the snap-fit ​​groove 2 909 to complete the installation of the cooling device. Check the connection between the cooling device and the demolding device to ensure that the snap-fit ​​post and snap-fit ​​groove fit tightly and that the device is securely installed. Inject the molten plastic material into the cavity of the lower mold 2 through external injection molding equipment. Then, start the lifting platform 5 to drive the upper mold 4 to move vertically downward along the guide rail 6 and guide rod 7, so that the upper mold 4 and the lower mold 2 close together, sealing the molten plastic material in the mold cavity to form the shape of the storage cover body 3. During the mold closing process, the guide rail 6 and guide rod 7 provide precise guidance and stable support for the upper mold 4, ensuring the accuracy of the mold closing between the upper and lower molds and making the storage cover forming dimensions accurate. After the mold closing is completed, start the cooling device. Because the cooling water pipe 905 has a spiral structure and the two sets of cooling devices are symmetrically distributed, the cooling medium can fully contact the storage cover and uniformly and rapidly cool the storage cover, allowing the molten plastic material in the mold to cool evenly and rapidly. The molded part solidifies rapidly within the cavity, shortening the cooling time and preventing quality issues such as deformation and warping of the storage lid due to uneven cooling. Once the storage lid has cooled and solidified, the electric cylinder 911 is activated. The electric cylinder 911 drives the telescopic rod 912, which in turn moves the clamping pad 913, upper release pad 914, and lower release pad 916 towards the storage lid. During this movement, the elastic spring 915 adaptively adjusts to the actual shape of the storage lid, achieving flexible clamping and preventing scratches on the surface of the storage lid during clamping. After the storage lid is clamped and removed from the mold, the telescopic rod 912 continues to move upward. The friction between the upper and lower demolding pads 914 and 916 and the storage lid causes the lid to detach from the lower mold 2, completing a smooth demolding operation. This ensures the storage lid is completely and smoothly demolded, reducing the scrap rate and minimizing manual demolding work, thus increasing the level of production automation. After demolding, the demolded storage lid is removed from the demolding device for subsequent quality inspection, packaging, and other processes, thus completing the production process of one storage lid.

[0025] 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 mould for the injection moulding of a storage cap, comprising a worktable (1), characterised in that: The workbench (1) is fixedly equipped with a lower mold (2), the lower mold (2) is provided with a storage cover body (3) on the top, the storage cover body (3) is provided with an upper mold (4) on the top, the upper mold (4) is fixedly equipped with a lifting platform (5) on the top, the workbench (1) is fixedly equipped with a guide rail (6), the workbench (1) is fixedly equipped with a guide rod (7), the workbench (1) is fixedly equipped with an installation plate (8) on the top, and an injection molding mechanism (9) is provided on the outside of the installation plate (8). The injection molding mechanism (9) includes a cooling device and a demolding device. The cooling device rapidly cools the storage cover and then activates the demolding device to demold the storage cover. The demolding device includes a mounting base one (901), which is mounted on the outside of the mounting plate (8). A snap-fit ​​post one (902) is fixedly mounted on the outside of the mounting base one (901). A mounting base two (908) is fixedly mounted on the outside of the mounting plate (8). A snap-fit ​​groove two (909) is opened on the outside of the mounting base two (908). A fixing bracket (910) is fixedly mounted on the top of the mounting base two (908). An electric cylinder (911) is fixedly installed on the part. A telescopic rod (912) is fixedly installed on the movable end of the electric cylinder (911). A clamping pad (913) is fixedly installed on the end of the telescopic rod (912) away from the electric cylinder (911). An upper demolding pad (914) is fixedly installed on the outside of the clamping pad (913). An elastic spring (915) is fixedly installed on the bottom of the upper demolding pad (914). A lower demolding pad (916) is fixedly installed on the bottom of the elastic spring (915).

2. The container lid formed injection mold of claim 1, wherein: The cooling device includes a connecting block 1 (903), which is installed on the outside of the mounting base 1 (901). A snap-fit ​​groove 1 (904) is provided on the outside of the connecting block 1 (903). A cooling water pipe (905) is connected through the outside of the connecting block 1 (903). A connecting block 2 (906) is connected through the end of the cooling water pipe (905) away from the connecting block 1 (903). A snap-fit ​​post 2 (907) is fixedly installed on the outside of the connecting block 2 (906).

3. The container lid formed injection mold of claim 2, wherein: The size of the first snap-fit ​​post (902) is the same as that of the second snap-fit ​​post (907), and the diameter of the first snap-fit ​​groove (904) is the same as that of the second snap-fit ​​groove (909).

4. The cap-in-mould injection mould according to claim 3, characterized in that: The lifting platform (5) is slidably connected to the guide rail (6) and the guide rod (7), and the cooling water pipe (905) has a spiral structure.

5. The cap-in-mould injection mould according to claim 3, characterized in that: The first snap-fit ​​post (902) is adapted to the first snap-fit ​​groove (904), and the second snap-fit ​​post (907) is adapted to the second snap-fit ​​groove (909).

6. The cap-in-mould injection mould according to claim 3, characterized in that: The first connecting block (903), the first snap-fit ​​groove (904), the cooling water pipe (905), the second connecting block (906), and the second snap-fit ​​post (907) are provided in two identical sets, and the two sets of the first connecting block (903), the first snap-fit ​​groove (904), the cooling water pipe (905), the second connecting block (906), and the second snap-fit ​​post (907) are symmetrically distributed about the vertical center line of the second mounting base (908).

7. The cap-in-mould injection mould according to claim 3, characterized in that: The size of the first mounting base (901) and the second mounting base (908) are the same, and the upper demolding pad (914) and the lower demolding pad (916) are the same.

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