Mold for injection molding shoe sole with easy demolding

Abstract

The utility model provides a mould with convenient demoulding for shoe sole injection relates to injection molding technical field among shoemaking industry, including lower mould, lower shoe mould is connected on lower mould, upper mould, upper mould is connected on lower mould, upper shoe mould, upper shoe mould is connected on upper mould, demoulding mechanism, demoulding mechanism includes L type frame, backing pad, sleeve column and spring, L type frame is connected through bolt screw thread on the upper end of lower mould, backing pad fixedly connected on the upper end of lower mould, sleeve column is connected through bolt screw thread on the upper end four corners of backing pad, spring is connected to the circumferential surface of sleeve column, through integration a set of efficient, reliable demoulding mechanism, including spring, sleeve column, lower fixed mould frame and flexible buffer platform, the automation of shoe sole product has been realized and has avoided the product damage caused by human operation.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology in the footwear industry, and in particular to a mold for easy demolding of shoe sole injection molding. Background Technology

[0002] Currently, in the footwear industry, shoe sole manufacturing typically relies on injection molding. However, traditional shoe sole injection molds have some design limitations, particularly in the demolding process, where issues such as product jamming and surface damage can easily occur. This not only affects production efficiency but also increases the defect rate and labor costs. Furthermore, due to the complex and diverse shapes of shoe soles, traditional molds struggle to adapt to the rapid changeover requirements of different shoe sole styles, limiting production flexibility.

[0003] In related technologies, existing injection molds mostly adopt rigid structures and lack effective automatic demolding mechanisms. After injection molding, operators need to manually tap or use additional tools to remove the finished product from the mold. This method is not only time-consuming and labor-intensive, but also easily causes scratches or deformation on the surface of the product. Although some improved molds have introduced simple ejection devices, their designs are often not precise enough to ensure smooth demolding every time, especially when dealing with shoe soles with complex geometries.

[0004] Furthermore, the connection methods between traditional mold components are relatively fixed, making disassembly and replacement difficult. This results in a very cumbersome process of adjusting the mold structure when faced with different sole designs. This inefficient design greatly restricts the production capacity of enterprises and increases maintenance costs.

[0005] To address the aforementioned problems, this utility model provides a mold for easy demolding in shoe sole injection molding. By integrating a highly efficient and reliable demolding mechanism, including springs, sleeve pillars, a lower fixed mold frame, and a flexible buffer platform, it achieves automated ejection of shoe sole products, avoiding product damage caused by human operation. Simultaneously, the mold adopts a modular design, with the upper and lower shoe molds respectively connected to the corresponding fixed mold frames via upper and lower fixing ports, allowing for quick replacement of mold components and improving equipment versatility and ease of maintenance. This innovative design not only significantly improves production efficiency and product quality but also enhances the mold's adaptability to different types of shoe soles. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a mold for easy demolding in shoe sole injection molding, as described in this application embodiment, thereby solving the above-mentioned technical problems.

[0007] This utility model provides a mold for easy demolding in shoe sole injection molding, comprising:

[0008] Lower mold;

[0009] The lower shoe mold is connected to the lower mold.

[0010] An upper mold, which is connected to a lower mold;

[0011] Upper shoe mold, which is connected to the upper mold;

[0012] The demolding mechanism includes an L-shaped frame, a pad, a sleeve, and a spring. The L-shaped frame is connected to the upper end of the lower mold by bolts and threads. The pad is fixedly connected to the upper end of the lower mold. The sleeve is connected to the four corners of the upper end of the pad by bolts and threads. The spring is sleeved and connected to the circumferential surface of the sleeve.

[0013] Preferably, the upper mold further includes a connecting sleeve and an upper fixed mold frame, the upper fixed mold frame is slidably connected to the sleeve post, the upper fixed mold frame is fixedly connected to the connecting sleeve, and the upper shoe mold and the upper fixed mold frame are connected by bolts and threads.

[0014] Preferably, the lower mold further includes a flexible buffer platform and a lower fixed mold frame. The flexible buffer platform is fixedly connected to the upper end of the pad, and the lower fixed mold frame is sleeved and connected to the spring. The lower fixed mold frame matches the upper shoe mold.

[0015] Preferably, the lower fixed mold frame has a lower fixing opening on its side end, and the lower fixing opening is connected to the lower shoe mold by bolts.

[0016] Preferably, the upper fixed mold frame has an upper fixing opening on its side end, and the upper fixing opening is connected to the upper shoe mold by bolts.

[0017] Preferably, the upper end of the upper mold is connected to an injection port by a bolt thread, and the injection port passes through the upper mold, the upper fixed mold frame, the upper shoe mold and the lower shoe mold from top to bottom.

[0018] Compared with related technologies, the mold for easy demolding in shoe sole injection provided by this utility model has the following beneficial effects:

[0019] 1. This utility model features a demolding mechanism consisting of a sleeve column, a spring, a lower fixed mold frame, and a flexible buffer platform, which enables automatic ejection of the shoe sole after injection molding. When the upper mold opens, the spring returns to its original shape, pushing the lower fixed mold frame upward, thereby smoothly ejecting the molded shoe sole from the lower mold. This avoids product damage or mold wear caused by traditional manual knocking or mechanical forced demolding, significantly improving demolding efficiency and product qualification rate.

[0020] 2. In this design, the upper shoe mold and the upper fixed mold frame are connected by upper fixing bolts, and the lower shoe mold and the lower fixed mold frame are connected by lower fixing bolts, achieving a modular design for the mold components. This connection method not only ensures structural stability and precise positioning, but also allows for quick disassembly and installation when different styles need to be replaced or worn parts need to be repaired, greatly improving the equipment's versatility and ease of maintenance, and reducing production costs and downtime. Attached Figure Description

[0021] Figure 1 A three-dimensional structural schematic diagram provided for an embodiment of this application;

[0022] Figure 2 An exploded view diagram provided for an embodiment of this application;

[0023] Figure 3 Provided for the embodiments of this application Figure 2 Exploded 3D view of the upper and middle mold sections;

[0024] Figure 4 Provided for the embodiments of this application Figure 2 Exploded 3D view of the lower mold section.

[0025] In the diagram: 1. Lower mold; 101. L-shaped frame; 102. Pad; 103. Sleeve column; 104. Spring; 105. Flexible buffer platform; 106. Lower fixed mold frame; 107. Lower shoe mold; 2. Upper mold; 201. Injection port; 202. Upper fixed mold frame; 203. Upper shoe mold; 204. Connecting sleeve; 3. Upper fixing port; 4. Lower fixing port. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Please refer to the following: Figures 1 to 4 A mold for easy demolding in shoe sole injection molding, comprising:

[0028] Lower mold 1;

[0029] The lower shoe mold 107 is connected to the lower mold 1;

[0030] Upper mold 2 is connected to lower mold 1;

[0031] Upper shoe mold 203 is connected to upper mold 2;

[0032] The demolding mechanism includes an L-shaped frame 101, a pad 102, a sleeve 103, and a spring 104. The L-shaped frame 101 is connected to the upper end of the lower mold 1 by bolts and threads. The pad 102 is fixedly connected to the upper end of the lower mold 1. The sleeve 103 is connected to the four corners of the upper end of the pad 102 by bolts and threads. The spring 104 is sleeved and connected to the circumferential surface of the sleeve 103.

[0033] In the specific implementation process, after the upper mold 2 and the lower mold 1 are closed, the injection material is injected into the mold cavity formed by the upper shoe mold 203 and the lower shoe mold 107 through the injection port 201;

[0034] In this way, the raw materials are filled into the mold cavity under high temperature and high pressure to form the desired shape of the shoe sole.

[0035] More specifically, after injection molding is completed, the mold enters the demolding stage. The control equipment drives the upper mold 2 to move upward, which in turn drives the connecting sleeve 204 and the upper fixed mold frame 202 fixed thereto to slide and rise along the sleeve column 103.

[0036] In this way, the spring 104 gradually recovers its deformation due to the loss of compression force, pushing the lower fixed mold frame 106 and the lower shoe mold 107 above it to push the formed shoe sole upward.

[0037] When the upper fixed mold frame 202 continues to rise and leaves the mold cavity area, the flexible buffer platform 105 plays a shock absorption and buffering role to prevent the mold components from being damaged by impact.

[0038] In this way, the shoe sole is stably ejected from the lower shoe mold 107, achieving rapid and complete demolding, avoiding product damage or mold wear caused by manual knocking or forced removal in traditional methods.

[0039] Once demolding is complete, the mold is reset and ready to enter the next cycle;

[0040] In this way, the entire injection molding demolding process is highly efficient and automated, significantly improving production efficiency and product consistency.

[0041] refer to Figures 1 to 4 As shown, the upper mold 2 also includes a connecting sleeve 204 and an upper fixed mold frame 202. The upper fixed mold frame 202 is slidably connected to the sleeve post 103 and fixedly connected to the connecting sleeve 204. The upper shoe mold 203 and the upper fixed mold frame 202 are connected by bolt threads.

[0042] It should be noted that when the upper mold 2 begins to rise after injection molding is completed, the connecting sleeve 204 drives the upper fixed mold frame 202, which is fixedly connected to it, to move upward together;

[0043] In this way, the upper fixed mold frame 202 slides along the sleeve post 103, providing guidance and linkage support for the subsequent demolding action.

[0044] As the upper fixed mold frame 202 rises, the upper shoe mold 203 connected inside it gradually separates from the lower shoe mold 107 in the lower mold.

[0045] This avoids the difficulty of demolding caused by the adhesion between the upper shoe mold 203 and the molded shoe sole, ensuring that the product can be successfully removed.

[0046] In this way, when the spring 104 releases its elastic potential energy during the demolding stage to push the lower fixed mold frame 106 to rise, the upper fixed mold frame 202 is already in a stable rising state and will not interfere with the demolding action; thereby realizing coordinated movement between the upper and lower mold components and improving demolding efficiency and safety.

[0047] refer to Figures 1 to 4 As shown, the lower mold 1 also includes a flexible buffer platform 105 and a lower fixed mold frame 106. The flexible buffer platform 105 is fixedly connected to the upper end of the pad 102, and the lower fixed mold frame 106 is sleeved and connected to the spring 104. The lower fixed mold frame 106 matches the upper shoe mold 203.

[0048] It should be noted that when the upper mold 2 and the lower mold 1 complete the injection molding process and begin to separate,

[0049] In this way, the upper shoe mold 203 first separates from the lower shoe mold 107, and the formed sole remains temporarily inside the lower shoe mold 107.

[0050] As the upper mold 2 continues to rise, the spring 104 begins to extend due to the loss of pressure applied by the upper mold, pushing the lower fixed mold frame 106 to move upward;

[0051] In this way, the lower mold frame 106 drives the lower shoe mold 107 connected to it to move upward together, which helps to push the formed shoe sole out of the lower shoe mold 107 and achieve initial demolding.

[0052] More specifically, when the spring 104 has fully recovered its deformation, and the lower fixed mold frame 106 and the lower shoe mold 107 on it reach their highest point,

[0053] In this way, the formed sole is completely pushed out of the lower shoe mold 107, ensuring that it can smoothly detach from the mold and avoiding the problem of the sole getting stuck in the lower shoe mold.

[0054] After the entire demolding process is completed, the lower mold 1 is ready to be reset. At this time, the flexible buffer table 105 plays its role in shock absorption.

[0055] In this way, during the return process of the lower mold frame 106 and other related components, the flexible buffer table 105 can absorb the impact force, reduce the wear on the mold parts, reduce noise, and improve the service life of the equipment and operational safety.

[0056] refer to Figures 1 to 4As shown, the lower fixed mold frame 106 has a lower fixing port 4 on its side end, and the lower fixing port 4 is connected to the lower shoe mold 107 by bolts.

[0057] It should be noted that when the lower shoe mold 107 needs to be installed or replaced, it can be easily disassembled or reinstalled by loosening the bolts fixed in the lower fixing port 4, which simplifies the maintenance and adjustment process of the mold assembly.

[0058] More specifically, when the lower shoe mold 107 needs to be replaced due to wear and tear from long-term use or to accommodate different sole designs, the operator can simply unscrew the bolts from the lower fixing port 4 to quickly remove the old lower shoe mold 107. The new lower shoe mold 107 is then aligned and secured to the lower fixing port 4 with bolts, ensuring a stable connection. After replacing the lower shoe mold 107, this ensures a precise match between the newly installed lower shoe mold 107 and the upper shoe mold 203, maintaining the consistency and accuracy of the sole shape formed during injection molding. Furthermore, when the lower mold 1 is subjected to high pressure during injection molding, the lower fixing port 4 and its internal bolt connections effectively prevent displacement or loosening of the lower shoe mold 107, ensuring the stability and reliability of the entire mold system. This design not only improves equipment safety but also reduces product defect rates caused by unstable mold components.

[0059] refer to Figures 1 to 4 As shown, the upper fixed mold frame 202 has an upper fixing port 3 on its side end, and the upper fixing port 3 is connected to the upper shoe mold 203 by bolts.

[0060] It should be noted that when producing soles of different models or designs, frequent replacement of the upper mold 203 may be necessary. Operators can quickly remove the old upper mold 203 by simply unscrewing the bolts from the upper fixing port 3. Next, the new upper mold 203 is aligned and secured to the upper fixing port 3 with bolts, ensuring a stable connection. After replacing the upper mold 203, this ensures a precise match between the newly installed upper mold 203 and the lower mold 107, maintaining the consistency and accuracy of the sole shape formed during injection molding. This quick replacement mechanism not only improves production efficiency but also reduces downtime. Furthermore, during injection molding, the upper mold 2 bears the pressure from the high-pressure injection material. The upper fixing port 3 and its internal bolt connections effectively prevent displacement or loosening of the upper mold 203, ensuring the stability and reliability of the entire mold system. This design not only improves equipment safety but also reduces product defect rates caused by unstable mold components. Furthermore, when the lower mold 1 and the upper mold 2 are closed for injection molding, the upper shoe mold 203 and the lower shoe mold 107 fit together tightly to form a closed mold cavity. In this way, the strong and precise bolt connection ensures a firm connection between the upper shoe mold 203 and the upper fixed mold frame 202, avoiding mold misalignment caused by pressure, thereby ensuring the quality and precision of the shoe sole molding.

[0061] refer to Figures 1 to 4 As shown, the upper end of the upper mold 2 is connected to the injection port 201 by bolt thread. The injection port 201 passes through the upper mold 2, the upper fixed mold frame 202, the upper shoe mold 203 and the lower shoe mold 107 from top to bottom.

[0062] It should be noted that when preparing for shoe sole injection molding, the injection molding machine injects molten plastic material into the closed mold cavity formed by the upper shoe mold 203 and the lower shoe mold 107 through the injection port 201. More specifically, when the injection port 201 is fixed to the upper end of the upper mold 2 by bolt thread connection, this ensures a stable connection between the injection port 201 and the entire mold system, preventing leakage or displacement during high-pressure injection. The design of the injection port 201 allows it to pass through from the top of the upper mold 2 to the upper shoe mold 203, and finally reach the lower shoe mold 107, forming a continuous injection channel. When the injection operation begins, the high-temperature, high-pressure plastic material flows from top to bottom along the injection port 201, passing sequentially through the upper mold 2, the upper fixed mold frame 202, and the upper shoe mold 203, finally entering the mold cavity jointly formed by the upper shoe mold 203 and the lower shoe mold 107. This design ensures that the material can fill the entire mold cavity evenly and stably, avoiding the generation of air bubbles or other defects. Furthermore, after injection molding, when the mold system requires cleaning or maintenance, the injection port 201 can be quickly disassembled by loosening the bolts, facilitating cleaning and inspection of the injection channel for residues or wear. This not only improves maintenance efficiency but also extends the equipment's lifespan. Moreover, considering that different shoe sole designs may require different injection paths or flow controls, different specifications or types of injection ports 201 can be replaced according to actual needs. The simple bolt connection allows for rapid replacement of the injection port, adapting to diverse production requirements.

[0063] The working principle of the mold for easy demolding in shoe sole injection provided by this utility model is as follows:

[0064] First, fix the lower mold 1 on the working platform of the injection molding machine, ensuring it is aligned with the equipment positioning slot. Then, install the upper mold 2 on the moving template of the injection molding machine, and securely connect the injection port 201 to the top of the upper mold 2 with bolts. Loosen the bolts in the upper fixing port 3 on the side of the upper fixed mold frame 202, remove the old upper shoe mold 203, install the new upper shoe mold 203 and tighten it. Similarly, loosen the bolts in the lower fixing port 4 on the side of the lower fixed mold frame 106, replace the corresponding lower shoe mold 107, and confirm that the spring 104 is in normal elasticity, the sleeve 103 slides smoothly, and the flexible buffer platform 105 has no aging or deformation to ensure a stable and reliable demolding process. Control the injection molding machine to move the upper mold 2 downward, driving the connecting sleeve 204 and the upper fixed mold frame 202 to descend synchronously until the upper shoe mold 203 and the lower shoe mold 107 are tightly fitted together to form a closed mold cavity. Check whether the fit between the upper and lower molds is tight to ensure there is no leakage. Risks of flash and material leakage; simultaneously confirm that the injection port 201 is well connected to the mold cavity. The injection molding machine injects heated and molten plastic material into the mold cavity through the injection port 201. The material passes through the upper mold 2, the upper fixed mold frame 202, and the upper shoe mold 203 from top to bottom, and finally fills the shoe sole-shaped cavity formed by the upper and lower shoe molds. After injection, a certain pressure is maintained for a period of time to allow the material to be fully filled and solidified. Then, it enters the cooling stage. After the product is completely solidified, the upper mold 2 opens upward, driving the upper fixed mold frame 202 to rise along the sleeve column 103, realizing separation from the lower mold 1. As the upper mold 2 rises, the originally compressed spring 104 begins to recover its deformation, pushing the lower fixed mold frame 106 and the lower shoe mold 107 above it to move upward, thereby ejecting the molded shoe sole product from the lower shoe mold. The operator manually or through a robot arm removes the ejected shoe sole product and checks for defects such as missing material, air bubbles, or flash.

[0065] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A mold for easy demolding in shoe sole injection molding, characterized in that, include: Lower mold; The lower shoe mold is connected to the lower mold. An upper mold, which is connected to a lower mold; Upper shoe mold, which is connected to the upper mold; The demolding mechanism includes an L-shaped frame, a pad, a sleeve, and a spring. The L-shaped frame is connected to the upper end of the lower mold by bolts and threads. The pad is fixedly connected to the upper end of the lower mold. The sleeve is connected to the four corners of the upper end of the pad by bolts and threads. The spring is sleeved and connected to the circumferential surface of the sleeve.

2. The mold for easy demolding of shoe sole injection molding as described in claim 1, characterized in that: The upper mold also includes a connecting sleeve and an upper fixed mold frame. The upper fixed mold frame is slidably connected to the sleeve post and fixedly connected to the connecting sleeve. The upper shoe mold and the upper fixed mold frame are connected by bolts and threads.

3. The mold for easy demolding of shoe sole injection molding as described in claim 2, characterized in that: The lower mold also includes a flexible buffer platform and a lower fixed mold frame. The flexible buffer platform is fixedly connected to the upper end of the pad, and the lower fixed mold frame is sleeved and connected to the spring. The lower fixed mold frame matches the upper shoe mold.

4. The mold for easy demolding of shoe sole injection molding as described in claim 3, characterized in that: The lower fixed mold frame has a lower fixing opening on its side end, and the lower fixing opening is connected to the lower shoe mold by bolts.

5. The mold for easy demolding of shoe sole injection molding as described in claim 4, characterized in that: The upper fixed mold frame has an upper fixing port on its side end, and the upper fixing port is connected to the upper shoe mold by bolts.

6. The mold for easy demolding of shoe sole injection molding as described in claim 1, characterized in that: The upper end of the upper mold is connected to an injection port by bolt thread. The injection port passes through the upper mold, the upper fixed mold frame, the upper shoe mold and the lower shoe mold from top to bottom.

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