A sole forming mold having a shock absorbing structure

Abstract

The application relates to the technical field of shoe sole forming dies, in particular to a shoe sole forming die with a damping structure, which comprises an upper die assembly, a lower die assembly and a damping support assembly. The damping support assembly is arranged at the bottom of the lower die assembly, is connected with a mounting base through an elastic buffering unit, and cooperates with a dynamic balance adjusting unit to absorb impact energy and maintain parallelism of the die. The elastic buffering unit is designed in a spring assembly and a limiting sleeve, and the dynamic balance adjusting unit realizes dynamic adjustment through an adjusting screw and a balance plate. The guiding mechanism is provided with a wear-resistant coating, the inner wall of a forming cavity is provided with exhaust holes and a filter screen, and the overall structure further comprises a sealing ring and a reinforcing rib. The application can effectively reduce vibration influence, improve forming precision and product quality, prolong the service life of the die, and meet the production requirements of high precision and long service life.

Description

Technical Field

[0001] This utility model belongs to the field of mold manufacturing and shoe sole processing technology, specifically a shoe sole forming mold with a shock-absorbing structure. Background Technology

[0002] In the design and application of shoe sole molding dies, the damping performance of the die is one of the important factors affecting production efficiency and product quality. Currently, some dies on the market improve closing accuracy and automation through optimized structural design, but these dies often have shortcomings in damping performance. For example, during high-pressure closing or continuous production, the die is prone to accelerated wear, decreased molding accuracy, and even reduced equipment lifespan due to vibration. Furthermore, vibration can also cause defects such as uneven product surfaces and increased air bubbles, thereby reducing the product qualification rate.

[0003] For example, CN113858526B discloses a "shoe-making mold," which includes an upper mold, a lower mold, a mold-opening device, a cooling device, and a heat-insulating device. Temperature control is achieved through a cold water channel and a movable plug assembly. Simultaneously, a thermal sensor box and a mold-opening cylinder enhance the automation of mold opening, offering advantages such as low energy consumption and high product quality. However, this solution primarily focuses on temperature control and mold-opening control, neglecting vibration damping during mold operation. Therefore, it is susceptible to vibration during high-frequency continuous production, leading to fluctuations in molding quality.

[0004] Furthermore, the "Injection Mold" disclosed in patent number CN107186960B features an ejector mechanism traction device. This device achieves stable positioning of the ejector mechanism through a guide locking assembly and a locking assembly, solving the problem of limited internal space in the mold. While it improves the stability of the ejection structure, the overall mold structure lacks shock absorption design. The impact force during mold closing is significant, easily causing mold cavity deformation, affecting product dimensional accuracy, and leading to problems such as loose parts and increased noise after long-term use.

[0005] The aforementioned problems indicate that current shoe sole molding dies on the market generally suffer from insufficient shock absorption and poor molding stability when dealing with high-frequency, high-intensity production demands, making it difficult to fully meet the modern footwear industry's requirements for high-precision, long-life molds. Therefore, this invention provides a shoe sole molding die with a shock-absorbing structure. By introducing elastic cushioning elements and a dynamic balance support system, it effectively absorbs impact energy during mold operation, improving mold stability and molding consistency, thereby enhancing product quality and mold lifespan. Utility Model Content

[0006] The purpose of this utility model is to solve the problems of increased wear, decreased molding accuracy, and uneven product surface caused by vibration in current shoe sole molding molds during high-pressure mold closing or continuous production.

[0007] To achieve the aforementioned objectives and address the aforementioned problems, this utility model provides a shoe sole molding die with a shock-absorbing structure, comprising an upper mold assembly, a lower mold assembly, and a shock-absorbing support assembly. The upper mold assembly and the lower mold assembly are connected via a guide mechanism. The shock-absorbing support assembly is located at the bottom of the lower mold assembly and is fixedly connected to a mounting base via elastic buffer units. The shock-absorbing support assembly includes multiple evenly distributed elastic buffer units and a dynamic balance adjustment unit. The elastic buffer units absorb impact energy during mold closing, and the dynamic balance adjustment unit maintains the parallelism between the upper and lower molds during mold operation.

[0008] The upper mold assembly includes an upper template and a forming cavity located below the upper template. The top of the upper template has a mounting interface for connecting to an external driving device, and the mounting interface is fixedly connected to an external power source by bolts. The lower mold assembly includes a lower template and a forming boss located above the lower template. The forming boss matches the forming cavity. The bottom of the lower template has multiple mounting slots for fixing elastic buffer units.

[0009] The elastic buffer unit includes a spring assembly and a limiting sleeve. The spring assembly is located inside the limiting sleeve, and both ends of the limiting sleeve are fixedly connected to the lower template and the mounting base, respectively. The inner wall of the limiting sleeve is provided with a slide rail, and the outer side of the spring assembly is provided with a slider that cooperates with the slide rail. The slider moves up and down along the slide rail to limit the radial offset of the spring assembly. The top of the spring assembly is fixed to the lower template by a threaded connection, and the bottom of the spring assembly is fixed to the mounting base by bolts.

[0010] As a preferred technical solution of this application, the dynamic balance adjustment unit includes multiple adjusting screws and a balance plate. The adjusting screws pass through the balance plate and are fixed to the lower template by a threaded connection. A locking nut is provided at the bottom of the adjusting screw to fix the position of the adjusting screw. The top of the balance plate is provided with multiple spherical grooves, and ball bearings are embedded in the spherical grooves. The ball bearings contact the bottom of the lower template to reduce friction and improve dynamic balance performance.

[0011] As a preferred technical solution of this application, the guiding mechanism includes multiple guide posts and guide sleeves. The guide posts are fixed to the top of the lower template, and the guide sleeves are fixed to the bottom of the upper template. The guide posts and guide sleeves slide relative to each other through a clearance fit. The outer side of the guide posts is provided with a wear-resistant coating made of high-molecular-weight polytetrafluoroethylene material to reduce the coefficient of friction and improve service life.

[0012] As a preferred technical solution of this application, the bottom of the mounting base is provided with an anti-slip pad, which is made of rubber material and has a thickness of 5mm to 10mm. The anti-slip pad is used to increase the friction between the mold and the ground and reduce the impact of external vibration on the mold.

[0013] As a preferred technical solution of this application, a sealing ring is provided at the connection between the upper template and the lower template. The sealing ring is made of silicone material and has an O-shaped cross-section, which is used to prevent external impurities from entering the mold and to improve the sealing performance of the mold.

[0014] As a preferred technical solution of this application, the inner wall of the molding cavity is provided with multiple vent holes, the diameter of which is 0.5mm to 1mm. The vent holes are used to discharge the gas generated during the mold closing process to avoid bubble defects. A filter screen is provided at the outlet end of the vent hole. The filter screen is made of stainless steel and is used to prevent external impurities from entering the mold.

[0015] As a preferred technical solution of this application, the bottom of the lower template is provided with a plurality of reinforcing ribs, the cross-section of the reinforcing ribs is rectangular, and the reinforcing ribs are fixedly connected to the lower template by welding, which is used to improve the structural strength of the lower template and reduce the amount of deformation during the operation of the mold.

[0016] Compared with existing technologies, the technical solution of this utility model effectively absorbs impact energy and maintains the parallelism between the upper and lower molds during mold closing by setting up an elastic buffer unit and a dynamic balance adjustment unit. The spring assembly in the elastic buffer unit, through the cooperation of the limiting sleeve and the slide rail, can evenly distribute the impact force onto the mounting base, thereby reducing the impact of vibration on the mold. The adjusting screw and balance plate in the dynamic balance adjustment unit work together to maintain the dynamic balance of the mold during operation by adjusting the height of the adjusting screw, further improving molding accuracy and product quality. In addition, the wear-resistant coating and sealing ring design in the guiding mechanism not only reduce the coefficient of friction but also improve the sealing performance of the mold, reducing the impact of external impurities on the mold. The design of the vent and filter effectively solves the problem of increased air bubbles during mold closing, thereby improving the product qualification rate.

[0017] In summary, by introducing elastic cushioning elements and a dynamic balance support system, this utility model effectively solves the problems of insufficient shock absorption performance and poor molding stability of existing shoe sole molding dies under high-frequency and high-intensity production requirements. It improves the smoothness of mold operation and molding consistency, extends the service life of the mold, and meets the requirements of the modern footwear industry for high-precision and long-life molds. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the overall structure of the upper mold assembly.

[0020] Figure 3 This is a cross-sectional view of the elastic buffer unit.

[0021] Figure 4 This is a schematic diagram of the dynamic balance adjustment unit.

[0022] Figure 5 This is a magnified view of a portion of the guiding mechanism.

[0023] The attached figures are labeled as follows:

[0024] 1. Upper mold assembly; 2. Lower mold assembly; 3. Shock-absorbing support assembly; 4. Elastic buffer unit; 5. Dynamic balance adjustment unit; 6. Guide mechanism; 7. Mounting base; 8. Spring assembly; 9. Limiting sleeve; 10. Slide rail; 11. Slider; 12. Adjusting screw; 13. Balance plate; 14. Ball bearing; 15. Guide post; 16. Guide sleeve; 17. Wear-resistant coating. Detailed Implementation

[0025] This utility model provides a shoe sole molding mold with a shock-absorbing structure. The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Figure 1 As shown, the overall structure of this utility model includes an upper mold assembly 1, a lower mold assembly 2, a shock-absorbing support assembly 3, and a guide mechanism 6. The upper mold assembly 1 and the lower mold assembly 2 are connected by the guide mechanism 6. The shock-absorbing support assembly 3 is located at the bottom of the lower mold assembly 2 and is fixedly connected to the mounting base 7 through an elastic buffer unit 4. The mounting base 7 is used to fix the entire mold assembly on the production equipment, and its bottom is provided with an anti-slip pad. The anti-slip pad is made of rubber material with a thickness of 5mm to 10mm to increase the friction between the mold and the ground and reduce the impact of external vibration on the mold.

[0026] The upper mold assembly 1 includes an upper template and a molding cavity located below the upper template. The top of the upper template has a mounting interface, which is fixedly connected to an external drive device via bolts, thereby enabling the upper mold assembly 1 to move up and down. The lower mold assembly 2 includes a lower template and a molding boss located above the lower template. The molding boss matches the molding cavity and is used to form the molding space for the shoe sole during mold closing. The bottom of the lower template has multiple mounting slots for fixing elastic buffer units 4. The number of elastic buffer units 4 is rationally arranged according to the mold size and load requirements. The elastic buffer unit 4 includes a spring assembly 8 and a limiting sleeve 9. The spring assembly 8 is located inside the limiting sleeve 9, and both ends of the limiting sleeve 9 are fixedly connected to the lower template and the mounting base 7, respectively. The inner wall of the limiting sleeve 9 has a slide rail 10, and the outer side of the spring assembly 8 has a slider 11 that cooperates with the slide rail 10. The slider 11 moves up and down along the slide rail 10 to limit the radial offset of the spring assembly 8. The top of the spring assembly 8 is fixed to the lower template via a threaded connection, and the bottom is fixed to the mounting base 7 via bolts. Through the above structural design, the elastic buffer unit 4 can absorb impact energy and evenly distribute the impact force to the mounting base 7 during the mold closing process.

[0027] The dynamic balance adjustment unit 5 is located at the bottom of the lower mold assembly 2, such as... Figure 4 As shown, the dynamic balance adjustment unit 5 includes multiple adjusting screws 12 and a balance plate 13. The adjusting screws 12 pass through the balance plate 13 and are fixed to the lower mold plate via threaded connections. A locking nut is provided at the bottom of the adjusting screw 12 to fix its position. The top of the balance plate 13 has multiple spherical grooves, each containing embedded balls 14. The balls 14 contact the bottom of the lower mold plate to reduce friction. By adjusting the height of the adjusting screws 12, a suitable gap can be maintained between the balance plate 13 and the lower mold plate, thereby maintaining the parallelism between the upper and lower molds during mold operation. The design of the dynamic balance adjustment unit 5 ensures that the mold maintains dynamic balance during high-frequency mold closing, avoiding the problem of decreased molding accuracy due to vibration.

[0028] The guiding mechanism 6 includes multiple guide posts 15 and guide sleeves 16. The guide posts 15 are fixed to the top of the lower template, and the guide sleeves 16 are fixed to the bottom of the upper template. The guide posts 15 and guide sleeves 16 slide relative to each other through a clearance fit. Figure 5 As shown, the outer side of the guide post 15 is provided with a wear-resistant coating 17, which is made of high-molecular polytetrafluoroethylene material to reduce the coefficient of friction and improve service life. The design of the guide mechanism 6 not only ensures the precise alignment of the upper mold assembly 1 and the lower mold assembly 2 during the mold closing process, but also reduces wear problems caused by long-term use, thereby extending the service life of the mold.

[0029] A sealing ring made of silicone with an O-shaped cross-section is installed at the connection between the upper and lower mold plates to prevent external impurities from entering the mold and improve its sealing performance. Multiple vent holes with a diameter of 0.5mm to 1mm are provided on the inner wall of the molding cavity to release gas generated during mold closing, preventing air bubble defects. A filter screen made of stainless steel is installed at the outlet end of the vent holes to block external impurities from entering the mold. The design of the vent holes and filter screen effectively solves the problem of increased air bubbles during mold closing, thereby improving the product yield.

[0030] The bottom of the lower mold plate has multiple reinforcing ribs with rectangular cross-sections. These ribs are fixedly connected to the lower mold plate by welding to improve its structural strength and reduce deformation during mold operation. The rib design allows the lower mold plate to maintain high rigidity even under significant pressure, further enhancing the overall stability of the mold.

[0031] In practical applications, the shoe sole forming mold of this invention uses an external drive device to move the upper mold assembly 1 downwards. The upper and lower mold plates gradually approach each other and achieve precise alignment under the action of the guide mechanism 6. When the upper mold assembly 1 and the lower mold assembly 2 are completely closed, the forming cavity and the forming boss work together to form the forming space of the shoe sole. At this time, the spring assembly 8 in the elastic buffer unit 4 is compressed, and the impact energy is transmitted to the mounting base 7 through the limiting sleeve 9, thereby effectively reducing the vibration of the mold caused by high-pressure mold closing or continuous production. At the same time, the dynamic balance adjustment unit 5 ensures that the mold maintains dynamic balance during operation through the coordinated action of the adjusting screw 12 and the balance plate 13, avoiding the problem of parallelism deviation between the upper and lower molds caused by vibration.

[0032] During mold opening, the external drive device moves the upper mold assembly 1 upwards, gradually separating the upper and lower mold plates, and the molded shoe sole is removed from the molding cavity. During this process, the clearance fit between the guide post 15 and the guide sleeve 16 of the guide mechanism 6 ensures smooth separation of the upper mold assembly 1 and the lower mold assembly 2, while the sealing ring effectively prevents external impurities from entering the mold. The design of the vent and filter further ensures the cleanliness of the mold interior, thereby improving the product yield.

[0033] Through the above structural design, the shoe sole molding mold of this utility model can maintain good shock absorption performance and molding stability under the requirements of high-frequency and high-intensity production. The introduction of the elastic buffer unit 4 and the dynamic balance adjustment unit 5 effectively solves the problems of increased wear, decreased molding accuracy, and uneven product surface caused by vibration in existing molds during continuous production. At the same time, the design of the wear-resistant coating 17 and the sealing ring in the guide mechanism 6 not only reduces the coefficient of friction but also improves the sealing performance of the mold and reduces the impact of external impurities on the mold. The design of the vent and filter effectively solves the problem of increased air bubbles during mold closing, thereby improving the product qualification rate.

[0034] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0035] In actual production, the sole forming mold is installed on automated shoe-making equipment, and the upper mold assembly 1 is controlled to move up and down by an external drive device. Initially, the upper mold assembly 1 and the lower mold assembly 2 are separated, and the operator puts the sole material into the forming boss of the lower mold assembly 2. Subsequently, the external drive device is activated, driving the upper mold assembly 1 to move downward, and the mold closing process begins.

[0036] During mold closing, the clearance fit between the guide post 15 and the guide sleeve 16 in the guide mechanism 6 ensures precise alignment between the upper mold assembly 1 and the lower mold assembly 2. The wear-resistant coating 17 on the outside of the guide post 15 effectively reduces the coefficient of friction, minimizing wear caused by long-term use. Simultaneously, the sealing ring at the connection between the upper and lower mold plates prevents external impurities from entering the mold, ensuring mold cleanliness. When the upper mold plate approaches the lower mold plate, the spring assembly 8 in the elastic buffer unit 4 begins to compress, and the slider 11 moves up and down along the slide rail 10 on the inner wall of the limiting sleeve 9, limiting the radial offset of the spring assembly 8 and thus evenly distributing the impact energy to the mounting base 7. This process effectively reduces the impact of vibrations generated by high-pressure mold closing on the mold, avoiding mold cavity deformation and uneven product surface.

[0037] When the upper mold assembly 1 and the lower mold assembly 2 are fully closed, the molding cavity and the molding boss work together to form the molding space of the shoe sole. At this time, the adjusting screw 12 and the balance plate 13 in the dynamic balance adjustment unit 5 work together to maintain an appropriate gap between the balance plate 13 and the lower mold plate by adjusting the height of the adjusting screw 12. The ball bearings 14 embedded at the top of the balance plate 13 contact the bottom of the lower mold plate, reducing friction and ensuring that the mold maintains dynamic balance during operation. This design avoids the problem of parallelism deviation between the upper and lower molds caused by vibration, further improving molding accuracy.

[0038] During the mold closing process, the vents on the inner wall of the molding cavity play a crucial role. These vents, with a diameter of 0.5mm to 1mm, effectively expel gas generated during mold closing, preventing air bubble defects. The filter screen at the vent outlet is made of stainless steel, blocking external impurities from entering the mold and ensuring a high product yield. Simultaneously, the reinforcing ribs welded to the bottom of the lower mold plate enhance its structural strength, maintaining high rigidity even under significant pressure, further strengthening the overall stability of the mold.

[0039] After the sole molding is completed, the external drive device moves the upper mold assembly 1 upward, and the mold enters the mold opening stage. During this process, the clearance fit between the guide post 15 and the guide sleeve 16 of the guide mechanism 6 ensures the smooth separation of the upper mold assembly 1 and the lower mold assembly 2. The operator removes the molded sole from the molding cavity, ready for the next production cycle.

[0040] As can be seen from the above steps, the shoe sole molding mold of this utility model exhibits excellent shock absorption performance and molding stability under high-frequency, high-intensity production requirements. The elastic buffer unit 4, through the cooperation of the spring assembly 8, the limiting sleeve 9, and the slide rail 10, evenly distributes impact energy to the mounting base 7, significantly reducing the problem of accelerated wear caused by mold vibration. The dynamic balance adjustment unit 5, through the synergistic action of the adjusting screw 12, the balance plate 13, and the ball bearings 14, maintains the dynamic balance during mold operation, avoiding the problem of decreased molding accuracy. Furthermore, the wear-resistant coating 17 and the sealing ring design in the guide mechanism 6 not only reduce the coefficient of friction but also improve the sealing performance of the mold, reducing the impact of external impurities on the mold. The design of the vent and filter effectively solves the problem of increased air bubbles during mold closing, thereby improving the product qualification rate.

[0041] In summary, by introducing elastic buffer elements and a dynamic balance support system, this utility model effectively solves the problems of increased wear, decreased molding accuracy, and uneven product surface caused by vibration in existing shoe sole molding dies during continuous production, thus meeting the requirements of the modern footwear industry for high-precision, long-life molds.

Claims

1. A shoe sole molding die with a shock-absorbing structure, characterized in that, The mold includes an upper mold assembly (1), a lower mold assembly (2), and a shock-absorbing support assembly (3). The upper mold assembly (1) and the lower mold assembly (2) are connected by a guide mechanism (6). The shock-absorbing support assembly (3) is located at the bottom of the lower mold assembly (2) and is fixedly connected to the mounting base (7) through an elastic buffer unit (4). The shock-absorbing support assembly (3) includes multiple evenly distributed elastic buffer units (4) and a dynamic balance adjustment unit (5). The elastic buffer unit (4) is used to absorb the impact energy during mold closing, and the dynamic balance adjustment unit (5) is used to maintain the parallelism between the upper and lower molds during mold operation.

2. The shoe sole forming mold with a shock-absorbing structure according to claim 1, characterized in that, The upper mold assembly (1) includes an upper template and a forming cavity located below the upper template. The top of the upper template is provided with an installation interface for connecting to an external driving device. The installation interface is fixedly connected to an external power source by bolts. The lower mold assembly (2) includes a lower template and a forming boss located above the lower template. The forming boss matches the forming cavity. The bottom of the lower template is provided with multiple mounting grooves for fixing the elastic buffer unit (4).

3. The shoe sole forming mold with a shock-absorbing structure according to claim 1, characterized in that, The elastic buffer unit (4) includes a spring assembly (8) and a limiting sleeve (9). The spring assembly (8) is located inside the limiting sleeve (9). The two ends of the limiting sleeve (9) are fixedly connected to the lower template and the mounting base (7) respectively. The inner wall of the limiting sleeve (9) is provided with a slide rail (10). The outer side of the spring assembly (8) is provided with a slider (11) that cooperates with the slide rail (10). The slider (11) moves up and down along the slide rail (10) to limit the radial offset of the spring assembly (8). The top of the spring assembly (8) is fixed to the lower template by a threaded connection. The bottom of the spring assembly (8) is fixed to the mounting base (7) by bolts.

4. The shoe sole forming mold with a shock-absorbing structure according to claim 1, characterized in that, The dynamic balance adjustment unit (5) includes multiple adjustment screws (12) and a balance plate (13). The adjustment screws (12) pass through the balance plate (13) and are fixed to the lower template by means of threaded connection. The bottom of the adjustment screws (12) is provided with a locking nut. The locking nut is used to fix the position of the adjustment screws (12). The top of the balance plate (13) is provided with multiple spherical grooves. The spherical grooves are embedded with balls (14). The balls (14) are in contact with the bottom of the lower template.

5. A shoe sole forming mold with a shock-absorbing structure according to claim 1, characterized in that, The guiding mechanism (6) includes multiple guide posts (15) and guide sleeves (16). The guide posts (15) are fixed to the top of the lower template, and the guide sleeves (16) are fixed to the bottom of the upper template. The guide posts (15) and guide sleeves (16) slide relative to each other through a clearance fit. The outer side of the guide posts (15) is provided with a wear-resistant coating (17), which is made of high-molecular polytetrafluoroethylene material.

6. A shoe sole forming mold with a shock-absorbing structure according to claim 1, characterized in that, The bottom of the mounting base (7) is provided with an anti-slip pad, which is made of rubber material and has a thickness of 5 mm to 10 mm.

7. A shoe sole forming mold with a shock-absorbing structure according to claim 2, characterized in that, A sealing ring is provided at the connection between the upper and lower templates. The sealing ring is made of silicone material and has an O-shaped cross-section. The inner wall of the molding cavity is provided with multiple vent holes. The diameter of the vent holes is 0.5 mm to 1 mm. A filter screen is provided at the outlet end of the vent holes. The filter screen is made of stainless steel material.

8. A shoe sole forming mold with a shock-absorbing structure according to claim 2, characterized in that, The bottom of the lower template is provided with multiple reinforcing ribs, the cross-section of which is rectangular, and the reinforcing ribs are fixedly connected to the lower template by welding.

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