A rubber drainage channel molding device and molding method

Abstract

This invention discloses a rubber drainage groove molding device and method, relating to the field of rubber molding. The device includes a drainage groove lower mold blank with a lower molding groove, an upper mold closing plate, an upper thermoforming template, a lower pressure closing plate, a degassing and demolding mechanism with a pressure regulating sleeve, and a drive assembly consisting of a lift, a lifting plate, and a pull rod. During molding, in the mold closing stage, the lift drive component moves downward, the pull spring assists the upper closing plate in closing the mold, and the pressure regulating sleeve and the fixed pressure regulating plate form a negative pressure to extract air from the cavity. In the hot pressing stage, the upper thermoforming template heats the rubber and cooperates with the lower molding groove to form a water-stopping structure simultaneously. In the demolding stage, the lift drives in the reverse direction, the sleeve forms a positive pressure, the venting lower pressure block pushes the venting sliding block to open the air passage, and the high-pressure gas pushes out the finished product. The whole system relies on mechanical linkage and air pressure control for efficient molding, and multiple seals ensure accuracy, improving product quality and production efficiency, and is suitable for large-scale production.

Description

Technical Field

[0001] This invention belongs to the field of rubber molding technology, specifically relating to a rubber drainage channel molding device and molding method. Background Technology

[0002] The reliability of drainage systems directly affects structural safety and service life. Rubber drainage channels, with their excellent elasticity, weather resistance, aging resistance, and sealing performance, can adapt to temperature changes and structural deformations in different environments. They are widely used in highway bridge expansion joints, roof drainage, and underground engineering waterproofing to guide rainwater and accumulated water out in an orderly manner, preventing water accumulation that could lead to leakage, corrosion, or structural damage. Compared to traditional metal or concrete drainage channels, they have significant advantages. However, existing rubber molding technology has significant shortcomings for products like rubber drainage channels, which have complex contours, long structures, and high sealing requirements. On the one hand, the cavity design and venting structure of general rubber part molding dies are difficult to adapt to large rubber drainage channels. During molding, due to the large amount of rubber raw material used, air is easily retained in the mold cavity, and air bubbles are easily generated inside the rubber raw material, leading to problems such as internal looseness and surface defects in the finished product, seriously affecting the product's density and mechanical properties. On the other hand, the demolding process often relies on manual assistance or traditional mechanical ejection methods. Manual intervention not only reduces production efficiency, but mechanical ejection can also easily damage precision parts such as the water-stopping structure of the rubber drainage channel.

[0003] Authorization announcement number "CN109822786B" discloses a novel molding die for rubber parts, including an upper mold plate and a lower mold plate. The lower mold plate is configured with a lower cavity for molding the lower part of a rubber part with protruding pillars, and the upper mold plate is configured with an upper cavity for molding the upper part of a rubber part with grooves. The lower mold plate has crisscrossing venting channels that divide it into four regions. Each region has multiple lower cavities arranged in a polygonal star structure. The lower cavities with formed base corners are closest to the center of the polygonal star, while the lower cavities with formed outer edges are located at the edge of the polygonal star structure and connected to venting grooves. The upper and lower cavities are arranged in a one-to-one correspondence. The top surface of the upper mold plate has a material channel that communicates with the upper cavity. This design re-plans the cavity design for molding rubber parts, incorporates venting channels to improve the yield of rubber parts, and designs a rubber feeding channel to reduce waste generation.

[0004] The above technical solutions design exhaust channels to improve the yield of rubber parts and design rubber feeding channels to reduce waste generation. However, its overall structural design is more suitable for molding general rubber parts with simple shapes and small sizes. It is difficult to adapt to the molding needs of products with complex contours, long structures and high sealing requirements, such as rubber drainage channels. When processing large rubber products, due to the use of more rubber raw materials, air bubbles may be generated, resulting in uneven filling. Summary of the Invention

[0005] The purpose of this invention is to provide a rubber drainage groove molding device and molding method, which aims to solve the problems in the prior art where, when processing large rubber products, more rubber raw materials are used, making it difficult to completely remove air from the mold cavity during the molding process, and the rubber raw materials are prone to residual air bubbles, resulting in low density of the finished product and easy surface defects.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A rubber drainage channel molding device, comprising:

[0008] The lower mold blank of the drainage channel serves as the bottom base support component for the molding of the rubber drainage channel;

[0009] A rubber injection tube, which is fixedly connected to one side of the lower mold blank of the drainage groove for rubber injection molding;

[0010] The lower forming groove is located at the upper end of the lower mold blank of the drainage groove, and is used to accommodate rubber raw materials and initially define the bottom forming shape of the drainage groove.

[0011] The upper closing plate of the mold is located at the upper end of the lower mold blank of the drainage groove, and cooperates with the lower mold blank of the drainage groove to form a closed molding space;

[0012] The upper hot melt molding template is slidably connected to the upper closed plate of the mold, and the upper hot melt molding template is matched with the lower molding groove for molding rubber drainage groove;

[0013] The lower closing plate is fixedly connected to the upper end of the upper thermomelting molding template and is used to transmit driving force to drive the upper thermomelting molding template to slide within the upper closing plate of the mold.

[0014] A degassing and demolding mechanism includes a pressure regulating sleeve, a pressure regulating plate, a pressure regulating hole, a pressure sealing plate, a venting sliding hole, a venting sliding block, and a lower vent. The pressure regulating sleeve is fixedly connected to the upper end of the upper closed plate of the mold. The pressure regulating plate is slidably connected inside the pressure regulating sleeve. The pressure regulating hole is located at the lower end of the upper closed plate of the mold and communicates with the interior of the pressure regulating sleeve. The pressure sealing plate is fixedly connected to the upper end of the lower closed plate and can slide within the pressure regulating hole. The venting sliding hole is opened through the upper end of the pressure sealing plate. The venting sliding block is slidably connected within the venting sliding hole. The lower vent is located on both sides of the venting sliding block and communicates with the upper gas inlet and outlet of the venting sliding block.

[0015] As a preferred embodiment of the present invention, a venting pressure groove is provided on the lower inner wall of the venting sliding hole, and a return spring is fixedly connected between the lower inner wall of the venting pressure groove and the lower end of the venting sliding block. The return spring is used to drive the venting sliding block to return to its initial position after it is slid under force, so as to realize the automatic opening and closing control of the lower venting hole.

[0016] As a preferred embodiment of the present invention, the lower end of the air pressure regulating plate is fixedly connected to a ventilating lower pressure block, and the ventilating lower pressure block has symmetrical upper vent holes on both sides. During the demolding stage, the bottom of the ventilating lower pressure block contacts the top of the ventilating sliding block and pushes it to slide. The upper vent holes are used to cooperate with the lower vent holes to realize gas flow.

[0017] As a preferred embodiment of the present invention, the upper end of the upper thermoforming template is provided with a pull-down groove, and a pull-down spring is fixedly connected to the lower end of the upper closing plate of the mold and the pull-down groove.

[0018] As a preferred embodiment of the present invention, waterstop forming grooves are provided at the lower ends of both sides of the upper hot melt forming template. An air communication hole is provided on the lower inner wall of the waterstop forming groove. The air communication hole is used to communicate with the cavity between the upper closing plate and the lower pressing closing plate of the mold and the lower vent hole, so as to exhaust the air in the cavity of the upper hot melt forming template and the lower forming groove, and realize the flow of gas between the degassing and demolding mechanism and the mold cavity.

[0019] As a preferred embodiment of the present invention, the upper end of the air pressure regulating plate is fixedly connected to an adjusting fixing plate, and the upper end of the adjusting fixing plate is fixedly connected to an upper fixing plate. The upper fixing plate is used to connect with an external ceiling or fixed frame to realize the fixed installation of the air pressure regulating plate and ensure that it remains relatively stationary during the opening and closing of the mold, thereby forming a stable air pressure change space between the air pressure regulating sleeve and the air pressure regulating plate.

[0020] As a preferred embodiment of the present invention, a side sealing plate is fixedly connected to the top of the lower mold blank of the drainage groove, a side template sealing ring is fixedly connected to the lower end of the upper closing plate of the mold, and a pressure sealing ring is surrounded on all four sides of the pressure regulating plate. The pressure sealing ring is used to prevent gas leakage between the pressure regulating sleeve and the pressure regulating plate, thereby ensuring the pressure regulating effect.

[0021] In a preferred embodiment of the present invention, the upper end of the upper closing plate of the mold is provided with an upper template sealing ring, and the upper end of the lower closing plate is fixedly connected with a pull rod, which passes through the upper template sealing ring and connects to the lifting plate.

[0022] As a preferred embodiment of the present invention, the upper end of the lifting plate is connected to a lifting machine, and the lifting plate is fixedly connected to the extended end of the lifting machine. The lifting machine serves as a driving source, and drives the lower closing plate, the upper hot melt forming template, and the upper closing plate of the mold to complete the mold opening and closing action through the lifting plate and the pulling rod.

[0023] On the other hand, this solution also provides a method for molding a rubber drainage channel, including the following steps:

[0024] S1. During the mold closing stage, the lifting machine is started. The extended end of the lifting machine extends and drives the lifting plate to move downward. The lifting plate drives the lower closing plate to move downward synchronously through the pull rod. The lower closing plate drives the upper thermoforming template to slide downward inside the upper closing plate of the mold. During this process, the air pressure sealing plate and the venting sliding block move downward synchronously with the lower closing plate. When the lower vent of the venting sliding block disengages from the air pressure regulating hole, both ends of the lower vent are exposed. The upper closing plate of the mold moves downward synchronously under the pulling action of the pull spring, and finally forms a closed cavity with the lower mold blank of the drain groove. At this time, the air pressure regulating sleeve moves downward synchronously with the upper closing plate of the mold. The air pressure regulating plate remains relatively stationary because the upper fixed plate is connected to the external fixed structure, so that a negative pressure environment is formed inside the air pressure regulating sleeve. The air in the mold cavity enters the air pressure regulating hole through the air communication hole, the cavity between the upper closing plate and the lower closing plate of the mold, the venting lower pressure groove, and the lower vent, and is finally sucked into the air pressure regulating sleeve, realizing the exhaust of the rubber raw material under vacuum.

[0025] S2. After the mold is closed, the molten rubber is quickly filled into the closed cavity formed by the lower molding groove and the upper hot melt molding template through the rubber injection tube. The upper hot melt molding template is heated so that the rubber material in the mold cavity is heated to a hot melt state. Under the hot pressing action of the upper hot melt molding template and the lower molding groove, the rubber material is gradually formed into the main structure of the rubber drainage groove. At the same time, the water stop plate forming grooves at the lower ends of both sides of the upper hot melt molding template cooperate with the lower molding groove to simultaneously form the water stop structure of the rubber drainage groove.

[0026] S3. After the rubber drainage groove is hot-pressed, the extended end of the control elevator retracts, and the lower closing plate moves upward through the lifting plate and the pulling rod. The lower closing plate drives the upper hot-melt forming template and the upper closing plate of the mold to rise synchronously. In the initial stage, the gas in the air pressure regulating sleeve is discharged from the lower vent and enters the cavity between the upper closing plate and the lower closing plate of the mold. When the air pressure sealing plate and the venting sliding block slide back into the air pressure regulating hole, both ends of the lower vent are closed, and the gas in the air pressure regulating sleeve stops being discharged. At this time, the bottom of the venting lower pressing block... The part is exactly against the top of the venting sliding block; when the pressing closing plate continues to rise, the venting pressing block pushes the venting sliding block to slide along the venting sliding hole and compresses the return spring, so that the venting sliding block extends out of the venting sliding hole and disengages from the air pressure regulating hole, and the two ends of the lower venting hole are exposed again; the gas in the air pressure regulating sleeve continues to be discharged from the lower venting hole, and enters the air communication hole through the cavity between the upper closing plate and the lower pressing closing plate of the mold. The gas squeezes the rubber in the water stop plate forming groove where the air communication hole is located, and pushes out the rubber drainage groove to achieve automatic demolding;

[0027] S4. After demolding, control the lower closing plate to descend, the bottom of the venting lower pressure block moves away from the top of the venting sliding block, the reset spring returns to its original state and pushes the venting sliding block back to its initial position, the device returns to its initial state, and is ready for the next molding cycle.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. By designing a degassing and demolding mechanism consisting of an air pressure regulating sleeve, an air pressure regulating plate, a venting sliding block, and multiple sets of vent holes, a negative pressure environment can be created during the mold closing stage by utilizing the relative movement of the air pressure regulating sleeve and the air pressure regulating plate. Combined with the precise connection between the air communication hole and the lower vent hole, the air in the upper hot melt molding template and the lower molding groove cavity, as well as the air bubbles in the rubber raw material, can be completely removed. This effectively reduces problems such as internal porosity and surface defects in the finished product, significantly improves the density and mechanical properties of the rubber drainage groove, and meets the requirements for high sealing performance.

[0030] 2. During the demolding stage, the linkage between the ventilated pressing block and the ventilated sliding block establishes positive pressure in the air pressure regulating sleeve. This pushes the gas through the vent and air communication holes into the waterstop forming groove, achieving automatic demolding of the rubber drainage groove by air pressure. This avoids damage to precision parts such as the waterstop structure caused by traditional mechanical ejection, and eliminates the need for manual assistance, significantly improving production efficiency.

[0031] 3. The lower ends of both sides of the upper hot-melt molding template are pre-set with water-stop plate forming grooves, which can be hot-pressed and formed synchronously with the main body of the drainage channel, without the need for subsequent processing, simplifying the production process; at the same time, the setting of components such as pull-down springs and return springs realizes automatic reset of mold closing and reset actions, improving the ease of operation of the equipment and the efficiency of cycle operation, and is more suitable for the molding needs of complex contours and long structures of rubber drainage channels. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a three-dimensional structural view of the present invention;

[0034] Figure 2 This is an exploded view of the lower mold blank of the drainage channel and the upper closed plate of the mold in this invention.

[0035] Figure 3 Exploded view of the lower mold blank of the drainage channel, the upper closing plate of the mold, and the lower pressure closing plate in this invention;

[0036] Figure 4 This is a sectional view of the vertical structure in this invention;

[0037] Figure 5 This is an exploded cross-sectional view of the lower mold blank of the drainage channel and the upper closed plate of the mold in this invention;

[0038] Figure 6 This is an exploded cross-sectional view of the lower mold blank of the drainage channel and the upper closed plate of the mold in this invention;

[0039] Figure 7 This is an exploded cross-sectional view of the upper closing plate and the lower pressing closing plate of the mold in this invention;

[0040] Figure 8 For the present invention Figure 6 Enlarged view of point A in the middle;

[0041] Figure 9 For the present invention Figure 6 Enlarged view of point B in the middle.

[0042] In the diagram: 1. Lower mold blank for drainage channel; 2. Lower forming groove; 3. Upper closing plate of mold; 4. Upper hot melt forming template; 5. Lower closing plate; 6. Air pressure regulating sleeve; 7. Air pressure regulating plate; 8. Air pressure regulating hole; 9. Air pressure sealing plate; 10. Ventilation sliding hole; 11. Ventilation sliding block; 12. Lower vent hole; 13. Ventilation lower pressure groove; 14. Return spring; 15. Pull-down groove; 16. Pull-down spring; 17. Water stop plate forming groove; 18. Air communication hole; 19. Adjustment fixing plate; 20. Upper fixing plate; 21. Side end sealing plate; 22. Side template sealing ring; 23. Air pressure sealing ring; 24. Ventilation lower pressure block; 25. Upper vent hole; 26. Upper template sealing ring; 27. Lifting machine; 28. Lifting plate; 29. ​​Pull rod; 30. Rubber injection pipe. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example: Please refer to Figures 1-9 The present invention provides the following technical solutions:

[0045] A rubber drainage channel molding device, comprising:

[0046] Lower mold blank 1 for drainage channel;

[0047] Rubber injection tube 30 is fixedly connected to one side end of the lower mold blank 1 of the drainage groove;

[0048] The lower forming groove 2 is located at the upper end of the lower mold blank 1 of the drainage groove;

[0049] The upper closing plate 3 of the mold is located at the upper end of the lower mold blank 1 of the drain groove, and cooperates with the lower mold blank 1 of the drain groove to form a closed molding space.

[0050] Upper hot melt molding template 4 is slidably connected to the upper closed plate 3 of the mold. The upper hot melt molding template 4 is matched with the lower molding groove 2 for molding rubber drainage grooves.

[0051] The lower closing plate 5 is fixedly connected to the upper end of the upper hot melt forming template 4 and is used to transmit driving force to drive the upper hot melt forming template 4 to slide within the upper closing plate 3 of the mold.

[0052] The degassing and demolding mechanism includes an air pressure regulating sleeve 6, an air pressure regulating plate 7, an air pressure regulating hole 8, an air pressure blocking plate 9, a venting sliding hole 10, a venting sliding block 11, and a lower venting hole 12. The air pressure regulating sleeve 6 is fixedly connected to the upper end of the upper closed plate 3 of the mold. The air pressure regulating plate 7 is slidably connected inside the air pressure regulating sleeve 6. The air pressure regulating hole 8 is opened at the lower end of the upper closed plate 3 of the mold and communicates with the interior of the air pressure regulating sleeve 6. The air pressure blocking plate 9 is fixedly connected to the upper end of the lower closed plate 5 and can slide within the air pressure regulating hole 8. The venting sliding hole 10 is opened through the upper end of the air pressure blocking plate 9. The venting sliding block 11 is slidably connected inside the venting sliding hole 10. The lower venting hole 12 is opened on both sides of the venting sliding block 11 and communicates with the upper gas inlet and outlet of the venting sliding block 11.

[0053] In a specific embodiment of the present invention, a lower molding groove 2 is provided at the upper end of the lower mold blank 1 of the drainage groove, which is used to receive rubber raw materials and form the bottom structure of the drainage groove. A rubber injection tube 30 is fixedly connected to one side end of the lower mold blank 1 of the drainage groove. One end of the tube is connected to the outlet of the external injection molding equipment, and the other end is connected to the lower molding groove 2 through a flow channel opened inside the lower mold blank 1 of the drainage groove, so as to ensure that the molten rubber can be injected into the molding cavity evenly and stably. The upper closing plate 3 of the mold is set above the lower mold blank 1 of the drainage groove and cooperates with it to realize the opening and closing of the mold. The upper hot melt molding template 4 is slidably connected to the inside of the upper closing plate 3 of the mold, and its position can be adjusted up and down to complete the mold closing and demolding actions. In use, the lifting machine 27 is started first to drive the lower closing plate 5 to move downward. The lower closing plate 5 drives the upper hot melt molding template 4 to move downward. At this time, since the position of the air pressure regulating plate 7 is relatively fixed, while the air pressure regulating sleeve 6 moves downward... As the upper closing plate 3 of the mold descends, relative motion is generated, creating a negative pressure environment inside the air pressure regulating sleeve 6. At the same time, the upper hot melt molding template 4 continues to move downward until the upper closing plate 3 of the mold and the lower mold blank 1 of the drain groove are completely closed, forming a closed molding cavity. After the mold is closed, the air pressure sealing plate 9 continues to slide along the air pressure regulating hole 8 under the action of the lower closing plate 5, causing the upper hot melt molding template 4 to be pressed down into the lower molding groove 2 to heat melt and mold the rubber. As the upper hot melt molding template 4 continues to move downward, the lower vent 12 slides out from the air pressure regulating hole 8. At this time, the upper closing plate 3 of the mold drives the air pressure regulating sleeve 6 to move downward, forming a relative displacement with the stationary air pressure regulating plate 7, creating a negative pressure inside the air pressure regulating sleeve 6. During the continuous downward movement of the upper hot melt molding template 4, the vent sliding block 11 moves synchronously with the air pressure sealing plate 9, causing the lower vent 12 to slide out from the range of the air pressure regulating hole 8. At this time, the negative pressure inside the air pressure regulating sleeve 6 communicates with the mold cavity through the lower vent hole 12, the vent sliding hole 10, the vent pressing groove 13, and the air communication hole 18, completely extracting the air in the cavity and the air bubbles wrapped in the rubber material. The extracted air enters the air pressure regulating sleeve 6, maintaining the stability of the negative pressure inside the sleeve, ensuring that the rubber material is fully vented in a low-pressure environment, reducing internal defects in the finished product, and improving the molding quality. After the rubber drainage groove completes hot pressing molding, the elevator 27 drives the pull rod 29 and the lower pressing closing plate 5 to move upward, thereby driving the upper hot melt molding template 4 and the upper mold closing plate 3 to rise synchronously. During this process, the air pressure sealing plate 9 moves upward with the lower pressing closing plate 5 and slides back into the air pressure regulating hole 8. The inner wall of the air pressure regulating hole 8 wraps around the vent sliding block 11, sealing the lower vent hole 12. As the upper mold continues to rise, the air pressure regulating sleeve 6 moves upward synchronously with the upper mold closing plate 3, its internal space gradually increases, and the air pressure gradually increases to form a positive pressure environment.When the upper closing plate 3 of the mold rises to a specific position, the venting pressure block 24 at the lower end of the air pressure regulating plate 7 contacts the top of the venting sliding block 11. As the upper mold continues to rise, the venting pressure block 24 pushes the venting sliding block 11 to slide along the venting sliding hole 10 and compresses the return spring 14, causing the venting sliding block 11 to extend out of the air pressure regulating hole 8, and the lower venting hole 12 to open again. At this time, the high-pressure gas in the air pressure regulating sleeve 6 enters the mold cavity through the upper venting hole 25, the lower venting hole 12, the venting pressure groove 13, and the air communication hole 18, applying a uniform thrust to the rubber drainage groove and pushing it out from the upper thermoforming template 4 and the lower forming groove 2, completing the automatic demolding. Throughout the entire operation, the mechanical linkage and air pressure control between the components achieve efficient and stable molding and demolding operations, which not only improves production efficiency but also significantly enhances product quality and consistency.

[0054] Please refer to the details. Figure 6 and Figure 8 The lower inner wall of the ventilation sliding hole 10 is provided with a ventilation pressure groove 13, and a return spring 14 is fixedly connected between the lower inner wall of the ventilation pressure groove 13 and the lower end of the ventilation sliding block 11.

[0055] In this embodiment: During the demolding stage, when the upper closing plate 3 of the mold begins to rise, the air pressure regulating plate 7, due to its fixed position, has its lower venting pressure block 24 gradually approaching and eventually contacting the air pressure sealing plate 9, which rises synchronously with the upper closing plate 3. As the upper closing plate 3 of the mold continues to rise, the venting pressure block 24 applies downward pressure to the venting sliding block 11 inside the air pressure sealing plate 9, pushing the venting sliding block 11 to slide downward along the venting sliding hole 10 and compressing the return spring 14. At this time, the venting sliding block 11 disengages from the range of the air pressure regulating hole 8, and the lower venting holes 12 on both sides are fully exposed, making the air passage between the inside of the air pressure regulating sleeve 6 and the mold cavity open. High-pressure gas can enter the cavity through this passage to push the finished product out of the mold. After demolding is completed, the venting pressure block 24 and the venting sliding block 11 gradually disengage. After the return spring 14 loses external pressure, it returns to its original state and pushes the venting sliding block 11 to slide upward along the venting sliding hole 10 back to the initial position. The lower venting hole 12 is then sealed again by the inner wall of the air pressure regulating hole 8, cutting off the air passage and preparing for the next molding.

[0056] Please refer to the details. Figure 7 , Figure 8 and Figure 9 The lower end of the air pressure regulating plate 7 is fixedly connected to a ventilating lower pressure block 24, and the ventilating lower pressure block 24 has symmetrical upper vent holes 25 on both sides.

[0057] In this embodiment: when the mold rises to the demolding position, the venting lower block 24 at the lower end of the air pressure regulating plate 7 makes precise contact with the venting sliding block 11 in the air pressure sealing plate 9, and applies downward pressure to it. This pressure pushes the venting sliding block 11 to slide downward along the venting sliding hole 10, simultaneously compressing the return spring 14, until the venting sliding block 11 is completely removed from the enclosure of the air pressure regulating hole 8, so that the lower venting holes 12 on both sides are fully exposed. At this time, a stable positive pressure environment has been formed inside the air pressure regulating sleeve 6 that rises with the upper closing plate 3 of the mold. The high-pressure gas passes through the upper venting hole 25 of the venting lower block 24, the lower venting hole 12 of the venting sliding block 11, and the air communication hole 18 in sequence, and finally flows into the waterstop forming groove 17 of the upper hot melt forming template 4. The gas generates a uniform thrust on the rubber structure in the waterstop forming groove 17, smoothly pushing the integrally formed rubber drainage groove out of the cavity, completing the automatic demolding action.

[0058] Please refer to the details. Figure 6 and Figure 9 The upper end of the upper hot melt molding template 4 is provided with a pull-down groove 15, and a pull-down spring 16 is fixedly connected to the lower end of the upper closing plate 3 and the pull-down groove 15.

[0059] In this embodiment: During the mold closing process, when the upper thermoforming template 4 moves downward, the pull-down spring 16 in its upper pull-down groove is stretched accordingly, generating elastic tension that acts on the upper closing plate 3 of the mold, causing the upper closing plate 3 of the mold to move downward synchronously. Under the continuous tension of the pull-down spring 16, the lower end of the upper closing plate 3 of the mold is tightly fitted with the top end of the lower mold blank 1 of the drainage groove, forming a complete closed molding cavity together with the lower forming groove 2.

[0060] Please refer to the details. Figure 7 , Figure 8 and Figure 9 The lower ends of both sides of the upper hot melt molding template 4 are provided with water-stop plate forming grooves 17. The lower inner wall of the water-stop plate forming groove 17 is provided with air communication holes 18. The air communication holes 18 are used to communicate with the cavity between the upper closing plate 3 and the lower pressure closing plate 5 of the mold and the lower vent hole 12 to exhaust the air in the cavity of the upper hot melt molding template 4 and the lower forming groove 2.

[0061] In this embodiment: a waterstop forming groove 17 is fixedly connected to the lower end of the upper hot-melt molding template 4. The waterstop forming groove 17 is formed synchronously with the main body of the drainage groove, ensuring that the rubber drainage groove forms a complete structural shape during the hot pressing process. An air communication hole 18 is provided on the lower inner wall of the waterstop forming groove 17. The air communication hole 18 penetrates the upper hot-melt molding template 4 and extends to its upper end. One end is connected to the mold cavity, that is, the space enclosed by the upper hot-melt molding template 4 and the lower forming groove 2, and the other end is connected to the cavity between the upper closing plate 3 and the lower pressing closing plate 5 of the mold. During the venting and demolding stages, the air communication hole 18 can be precisely matched with the lower vent hole 12 on the venting sliding block 11 and the upper vent hole 25 on the venting lower pressing block 24 to form a complete gas flow path from the air pressure regulating sleeve 6 to the mold cavity, providing a stable gas channel for negative pressure venting and positive pressure demolding.

[0062] Please refer to the details. Figure 3 , Figure 4 and Figure 5 The upper end of the air pressure regulating plate 7 is fixedly connected to an adjusting fixing plate 19, and the upper end of the adjusting fixing plate 19 is fixedly connected to an upper fixing plate 20. The upper fixing plate 20 is used to connect with the external ceiling or fixed frame to realize the fixed installation of the air pressure regulating plate 7, ensuring that it remains relatively stationary during the opening and closing of the mold, thereby forming a stable air pressure change space between the air pressure regulating sleeve 6 and the air pressure regulating plate 7.

[0063] In this embodiment: when the upper closing plate 3 of the mold drives the upper hot melt molding template 4 to move up and down, the air pressure regulating sleeve 6 moves synchronously with the upper closing plate 3 of the mold, while the air pressure regulating plate 7 remains unchanged because it is fixed to the upper fixed plate 20. The relative displacement of the two causes the internal space of the air pressure regulating sleeve 6 to change, thereby accurately forming the negative pressure mold closing and venting stage or the positive pressure demolding stage environment, providing a stable structural foundation for the gas regulation function.

[0064] Please refer to the details. Figures 3-7 The top of the lower mold blank 1 of the drainage groove is fixedly connected to a side sealing plate 21, the lower end of the upper closing plate 3 of the mold is fixedly connected to a side template sealing ring 22, and the sides of the air pressure regulating plate 7 are surrounded by air pressure sealing rings 23.

[0065] In this embodiment: a side sealing plate 21 is fixedly connected to the top edge of the lower mold blank 1 of the drain groove, and a side template sealing ring 22 is fixedly connected to the corresponding position at the lower end of the upper mold closing plate 3. The two fit tightly together when the mold is closed, forming a circumferential seal on the mold parting surface, which can effectively prevent the rubber raw material from leaking from the gap of the parting surface under high pressure, thereby ensuring the dimensional accuracy and appearance integrity of the product. In the air pressure regulation system, an air pressure sealing ring 23 is fixedly connected to the outer surface of the air pressure regulating plate 7 around its contour. The sealing ring fits tightly in the gap between the air pressure regulating plate 7 and the air pressure regulating sleeve 6, and can always maintain a sealed state during the relative movement of the two, ensuring that the air pressure regulating sleeve 6 can stably maintain the negative pressure mold closing and venting stage or the high pressure demolding stage environment, avoiding problems such as incomplete degassing and insufficient demolding thrust due to gas leakage, and ensuring the accuracy and reliability of the air pressure regulation function.

[0066] Please refer to the details. Figures 3-5 The upper end of the mold upper closing plate 3 is provided with an upper template sealing ring 26, and the upper end of the lower pressing closing plate 5 is fixedly connected with a pull rod 29. The pull rod 29 passes through the upper template sealing ring 26 and connects to the lifting plate 28.

[0067] In this embodiment: when the elevator 27 starts, its power is transmitted to the pull rod 29 via the lifting plate 28. After being stressed, the pull rod 29 drives the lower closing plate 5 to move downward, thereby driving the upper thermoforming template 4 to descend along the guide structure of the upper closing plate 3 of the mold, so that the mold enters the mold closing state. During the demolding stage, the drive mechanism moves in the opposite direction, and the pull rod 29 moves upward synchronously with the lifting plate 28, driving the lower closing plate 5 and the upper thermoforming template 4 to rise and reset as a whole. The upper end of the upper closing plate 3 of the mold is provided with an upper template sealing ring 26. The pull rod 29 passes through the sealing ring and is connected to the lower closing plate 5. The two work together to form a dynamic sealing structure: ensuring the sealing of the mold inside during the reciprocating motion of the pull rod 29, and stably transmitting the driving force to achieve efficient mold closing and precise demolding.

[0068] Please refer to the details. Figures 1-5 The upper end of the lifting plate 28 is connected to the lifting machine 27, and the lifting plate 28 is fixedly connected to the extended end of the lifting machine 27. The lifting machine 27 serves as a driving source, and through the lifting plate 28 and the pulling rod 29, it drives the lower closing plate 5, the upper hot melt forming template 4 and the upper closing plate 3 of the mold to complete the mold opening and closing action.

[0069] In this embodiment: When the lifting platform 27 is started, its extended end precisely pushes or pulls the lifting plate 28 vertically by extending or retracting. The power of the lifting plate 28 is transmitted to the lower closing plate 5 via the pulling rod 29, causing the upper thermoforming template 4 to slide up and down synchronously along the guide structure of the upper closing plate 3 of the mold. At the same time, it drives the air pressure sealing plate 9 to move accordingly within the air pressure regulating hole 8 along with the lower closing plate 5. Through this linkage mechanism, the device can orderly complete the mold opening and closing actions, and in the demolding stage, it can cooperate with the air pressure regulating system to realize the automatic release of the molded product, providing stable and controllable power output and coordinated action for the entire molding cycle.

[0070] The working principle and usage process of this invention are as follows: During the mold closing stage, the lifting machine 27 is activated, driving the lifting plate 28 and the pulling rod 29 downwards. This drives the lower closing plate 5 and the upper thermoforming template 4 downwards. The air pressure sealing plate 9 and the venting sliding block 11 move downwards with the lower closing plate 5. When the lower vent hole 12 of the venting sliding block 11 disengages from the air pressure regulating hole 8, both ends of the lower vent hole 12 are exposed, and the air in the mold cavity is forced into the air pressure regulating sleeve 6, completing the air removal after mold closing and reducing air bubbles in the rubber groove molding. During the demolding stage, the lifting machine 27 is driven to raise the lower closing plate 5. The gas in the air pressure regulating sleeve 6 is discharged from the lower vent hole 12 and enters the cavity between the upper closing plate 3 and the lower closing plate 5. When the air pressure sealing plate 9 and the venting sliding block 11 slide back into the air pressure regulating hole 8, both ends of the lower vent hole 12 are sealed, and the gas in the air pressure regulating sleeve 6... The body is no longer being pressed out. At this time, the bottom of the venting lower pressure block 24 is exactly against the top of the venting sliding block 11. When the pressing closing plate 5 continues to rise, the venting lower pressure block 24 presses down the venting sliding block 11, causing the return spring 14 to be compressed. The venting sliding block 11 extends out of the venting sliding hole 10 and then disengages from the air pressure regulating hole 8, exposing both ends of the lower venting hole 12. The gas in the air pressure regulating sleeve 6 will continue to be discharged from the lower venting hole 12 and enter the air communication hole 18 through the cavity between the upper closing plate 3 and the lower pressure closing plate 5 of the mold. The gas squeezes the rubber in the water stop plate forming groove 17 below the air communication hole 18, pushing out the rubber drainage groove to achieve automatic demolding. After demolding, the lower pressure closing plate 5 descends, and the bottom of the venting lower pressure block 24 will move away from the top of the lower pressure venting sliding block 11. The return spring 14 returns to its original state, and the venting sliding block 11 returns to its initial position, preparing for the next cycle.

[0071] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rubber drainage groove molding device, characterized in that: include: The lower mold blank (1) of the drainage channel serves as the bottom base support component for the molding of the rubber drainage channel; Rubber injection tube (30), the rubber injection tube (30) is fixedly connected to one side end of the lower mold blank (1) of the drain groove for rubber injection molding; The lower molding groove (2) is located at the upper end of the lower mold blank (1) of the drain groove, and is used to accommodate rubber raw materials and initially define the bottom molding shape of the drain groove; The upper closing plate (3) of the mold is located at the upper end of the lower mold blank (1) of the drain groove, and cooperates with the lower mold blank (1) of the drain groove to form a closed molding space; Upper hot melt molding template (4) is slidably connected to the upper closed plate (3) of the mold. The upper hot melt molding template (4) is matched with the lower molding groove (2) for molding rubber drainage grooves. The lower closing plate (5) is fixedly connected to the upper end of the upper thermoforming template (4) and is used to transmit driving force to drive the upper thermoforming template (4) to slide within the upper closing plate (3) of the mold. The degassing and demolding mechanism includes an air pressure regulating sleeve (6), an air pressure regulating plate (7), an air pressure regulating hole (8), an air pressure sealing plate (9), a venting sliding hole (10), a venting sliding block (11), and a lower vent (12). The air pressure regulating sleeve (6) is fixedly connected to the upper end of the mold upper closing plate (3), the air pressure regulating plate (7) is slidably connected inside the air pressure regulating sleeve (6), and the air pressure regulating hole (8) is opened in the mold upper closing plate (3). The lower end is connected to the inside of the air pressure regulating sleeve (6). The air pressure sealing plate (9) is fixedly connected to the upper end of the lower closing plate (5) and can slide in the air pressure regulating hole (8). The ventilation sliding hole (10) is opened through the upper end of the air pressure sealing plate (9). The ventilation sliding block (11) is slidably connected in the ventilation sliding hole (10). The lower ventilation hole (12) is opened on both sides of the ventilation sliding block (11) and is connected to the upper gas inlet and outlet of the ventilation sliding block (11).

2. The rubber drainage channel molding device according to claim 1, characterized in that: The lower inner wall of the ventilation sliding hole (10) is provided with a ventilation pressure groove (13). A return spring (14) is fixedly connected between the lower inner wall of the ventilation pressure groove (13) and the lower end of the ventilation sliding block (11). The return spring (14) is used to drive the ventilation sliding block (11) to return to its initial position after it is slid under force, so as to realize the automatic opening and closing control of the lower ventilation hole (12).

3. The rubber drainage channel molding device according to claim 2, characterized in that: The lower end of the air pressure regulating plate (7) is fixedly connected to a ventilating lower pressure block (24). The ventilating lower pressure block (24) has symmetrical upper vent holes (25) on both sides. During the demolding stage, the bottom of the ventilating lower pressure block (24) contacts the top of the ventilating sliding block (11) and pushes it to slide. The upper vent holes (25) are used to cooperate with the lower vent holes (12) to realize gas flow.

4. The rubber drainage channel molding device according to claim 3, characterized in that, The upper end of the upper thermoforming template (4) is provided with a pull-down groove (15), and the lower end of the upper closing plate (3) of the mold and the pull-down groove (15) are fixedly connected with a pull-down spring (16).

5. The rubber drainage channel molding device according to claim 4, characterized in that: Waterstop forming grooves (17) are opened at the lower ends of both sides of the upper hot melt forming template (4). The lower inner wall of the waterstop forming groove (17) is provided with air communication holes (18). The air communication holes (18) are used to communicate with the cavity between the upper closing plate (3) and the lower pressing closing plate (5) of the mold and the lower vent hole (12) to exhaust the air in the cavity of the upper hot melt forming template (4) and the lower forming groove (2) and realize the flow of gas between the degassing and demolding mechanism and the mold cavity.

6. The rubber drainage channel molding device according to claim 5, characterized in that, The upper end of the air pressure regulating plate (7) is fixedly connected to an adjusting fixing plate (19), and the upper end of the adjusting fixing plate (19) is fixedly connected to an upper fixing plate (20). The upper fixing plate (20) is used to connect with the external ceiling or fixed frame to realize the fixed installation of the air pressure regulating plate (7) and ensure that it remains relatively stationary during the opening and closing of the mold, so that a stable air pressure change space is formed between the air pressure regulating sleeve (6) and the air pressure regulating plate (7).

7. The rubber drainage channel forming device according to claim 6, characterized in that, The top of the lower mold blank (1) of the drain groove is fixedly connected to a side end sealing plate (21), the lower end of the upper closing plate (3) of the mold is fixedly connected to a side template sealing ring (22), and the sides of the air pressure regulating plate (7) are surrounded by an air pressure sealing ring (23). The air pressure sealing ring (23) is used to prevent gas leakage between the air pressure regulating sleeve (6) and the air pressure regulating plate (7) and to ensure the air pressure regulating effect.

8. The rubber drainage groove molding device according to claim 7, characterized in that, The upper end of the mold upper closing plate (3) is provided with an upper template sealing ring (26), and the upper end of the lower pressing closing plate (5) is fixedly connected with a pull rod (29). The pull rod (29) passes through the upper template sealing ring (26) and connects to the lifting plate (28).

9. The rubber drainage groove molding device according to claim 8, characterized in that, The upper end of the lifting plate (28) is connected to the lifting machine (27), and the lifting plate (28) is fixedly connected to the extended end of the lifting machine (27). The lifting machine (27) serves as the driving source, and through the lifting plate (28) and the pulling rod (29), it drives the lower closing plate (5), the upper hot melt forming template (4), and the upper closing plate (3) of the mold to complete the mold opening and closing action.

10. A method for molding a rubber drainage channel, applied to the rubber drainage channel molding apparatus of claim 9, characterized in that, Includes the following steps: S1. During the mold closing stage, the lifting machine (27) is started. The extended end of the lifting machine (27) extends and drives the lifting plate (28) to move downward. The lifting plate (28) drives the lower closing plate (5) to move downward synchronously through the pull rod (29). The lower closing plate (5) drives the upper hot melt molding template (4) to slide downward in the mold upper closing plate (3). During this process, the air pressure sealing plate (9) and the air venting sliding block (11) move downward synchronously with the lower closing plate (5). When the lower vent hole (12) of the air venting sliding block (11) disengages from the air pressure regulating hole (8), the two ends of the lower vent hole (12) are exposed. The mold upper closing plate (3) is pulled down by the spring (16). Under the pulling action, it moves down synchronously and eventually forms a closed cavity with the lower mold blank (1) of the drain groove; at this time, the air pressure regulating sleeve (6) descends synchronously with the upper closing plate (3) of the mold, while the air pressure regulating plate (7) remains relatively stationary due to the connection between the upper fixed plate (20) and the external fixed structure, so that a negative pressure environment is formed inside the air pressure regulating sleeve (6). The air in the mold cavity enters the air pressure regulating hole (8) through the air communication hole (18), the cavity between the upper closing plate (3) and the lower closing plate (5), the air venting lower pressure groove (13), and the lower air vent (12) in sequence, and is finally sucked into the air pressure regulating sleeve (6), so as to realize the exhaust of the rubber raw material in a vacuum state; S2. After the mold is closed, the molten rubber is quickly filled into the closed cavity formed by the lower molding groove (2) and the upper hot melt molding template (4) through the rubber injection tube (30). The upper hot melt molding template (4) is heated so that the rubber material in the mold cavity is heated to the hot melt state. Under the hot pressing action of the upper hot melt molding template (4) and the lower molding groove (2), the rubber material is gradually formed into the main structure of the rubber drainage groove. At the same time, the water stop plate forming groove (17) at the lower ends of both sides of the upper hot melt molding template (4) cooperates with the lower molding groove (2) to simultaneously form the water stop structure of the rubber drainage groove. S3. After the rubber drain groove is hot-pressed, the extended end of the control lift (27) is retracted. The lower closing plate (5) is driven to move upward through the lifting plate (28) and the pulling rod (29). The lower closing plate (5) drives the upper hot melt molding template (4) and the upper mold closing plate (3) to rise synchronously. In the initial stage, the gas in the air pressure regulating sleeve (6) is discharged from the lower vent (12) and enters the cavity between the upper mold closing plate (3) and the lower closing plate (5). When the air pressure sealing plate (9) and the venting sliding block (11) slide back into the air pressure regulating hole (8), both ends of the lower vent hole (12) are sealed, and the gas in the air pressure regulating sleeve (6) stops being discharged; at this time, the bottom of the venting lower pressure block (24) is exactly against the top of the venting sliding block (11); when the lower pressure closing plate (5) continues to rise, the venting lower pressure block (24) pushes the venting sliding block (11) to slide along the venting sliding hole (10) and compress the reset spring (14), so that the air is vented. The sliding block (11) extends out of the ventilation sliding hole (10) and disengages from the air pressure regulating hole (8), and the two ends of the lower ventilation hole (12) are exposed again; the gas in the air pressure regulating sleeve (6) continues to be discharged from the lower ventilation hole (12), and enters the air communication hole (18) through the cavity between the upper closing plate (3) and the lower pressure closing plate (5) of the mold. The gas squeezes the rubber in the water stop plate forming groove (17) where the air communication hole (18) is located, and pushes out the rubber drainage groove to achieve automatic demolding; S4. After demolding, control the lower closing plate (5) to descend, the bottom of the ventilated lower pressure block (24) moves away from the top of the ventilated sliding block (11), the reset spring (14) returns to its original state and pushes the ventilated sliding block (11) back to the initial position, the device returns to the initial state and is ready for the next molding cycle.

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