Air intake pipe rubber joint processing die and method

Abstract

The application discloses an air inlet pipe rubber joint processing die and method, and the die comprises an upper die, a lower die, a die core and a framework, the upper die, the lower die and the die core jointly form a cavity accommodating rubber, the framework is arranged in the cavity, the lower die is provided with a positioning hole, the die core is provided with a positioning protrusion matched with the positioning hole, and the die core is coaxially arranged with the cavity through the positioning protrusion; the die further comprises an injection cylinder and a cylinder cover, the injection cylinder is arranged on the upper die, the injection cylinder is provided with an accommodating cavity accommodating rubber and an injection opening for injecting rubber into the cavity; the cylinder cover is arranged on the injection cylinder and is provided with an abutting part matched with the accommodating cavity, and the cylinder cover moves towards the injection cylinder under the driving of external force, so that the rubber in the accommodating cavity is extruded into the cavity through the injection opening; the connecting parts of the lower die and the upper die, the upper die and the injection cylinder and the die core and the injection cylinder are all provided with material returning grooves near one end of the cavity, so that the problems of burrs and deformation of the plastic framework in the traditional process are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of rubber processing technology, and in particular to a mold and method for processing rubber joints for air intake pipes. Background Technology

[0002] With the development of rubber vulcanization and molding technology, a vulcanization molding technology for rubber products with an internal skeleton has emerged. The characteristic of this technology is that the skeleton and rubber are fused together through the vulcanization process, resulting in products with high bonding strength and stability. It is widely used in rubber components that require high durability, high sealing, and complex shapes.

[0003] Patent document CN102962931A discloses a method for producing a rubber clamp with an inner skeleton and a rubber vulcanizing mold. The method involves heating the rubber vulcanizing mold to a certain temperature, placing a metal skeleton coated with adhesive in the rubber vulcanizing section into the positioning groove of the lower template of the rubber vulcanizing mold, and accurately positioning the holes on the metal skeleton with the positioning holes of the lower template through positioning pins. Then, the upper template is covered, an appropriate amount of rubber material is added to the feeding chamber, and after pressing in the injection plug, vulcanization is performed. In this way, the rubber material enters the cavity through the main guide and wraps around the metal skeleton to form a rubber sleeve product, so that the metal skeleton and the rubber sleeve are vulcanized into one piece using a rubber mold.

[0004] However, the technical solution provided by this invention lacks sufficient space to accommodate excess adhesive when it is extruded into the mold, causing it to overflow directly onto the mold joint and the surface of the skeleton. This randomness of overflow increases flash and may further affect the surface quality and dimensional accuracy of the product. Furthermore, the mold structure used in this invention is primarily designed for metal skeletons, and its high-temperature, high-pressure molding conditions are not suitable for plastic skeletons. Because plastic skeletons have weak mechanical properties at high temperatures, they are prone to deformation or even damage under stress, leading to substandard product quality. Summary of the Invention

[0005] Therefore, it is necessary to provide a mold and method for processing air intake pipe rubber joints to address the aforementioned problems of easy flash and easy deformation of plastic skeleton.

[0006] This application provides a processing mold for an intake pipe rubber joint, including an upper mold, a lower mold, a mold core, and a skeleton. The upper mold, lower mold, and mold core together form a cavity for receiving rubber material, and the skeleton is disposed within the cavity.

[0007] The lower mold is provided with a positioning hole, and the mold core is provided with a positioning protrusion that matches the positioning hole. The mold core is coaxially arranged with the cavity through the positioning protrusion.

[0008] The rubber vulcanizing mold also includes an injection cylinder and a cylinder cover. The injection cylinder is disposed on the upper mold and has a receiving cavity for receiving rubber material and an injection port for injecting rubber into the cavity.

[0009] The cylinder cover is disposed on the injection cylinder. The cylinder cover has an abutment portion adapted to the receiving cavity. Under the drive of external force, the cylinder cover moves toward the injection cylinder until the abutment portion abuts against the bottom of the receiving cavity, so as to squeeze the rubber material in the receiving cavity into the mold cavity through the injection port.

[0010] The lower mold and the upper mold are connected at one end near the cavity, the upper mold and the injection cylinder are connected at one end near the cavity, and the mold core and the injection cylinder are connected at one end near the cavity. The ejector groove is used to accommodate the extruded rubber material.

[0011] Optionally, the lower mold is provided with a positioning groove, which is adapted to the outer ring of the top cover and the upper edge protrusion of the top cover of the skeleton. After the skeleton is installed into the cavity, the lower edge of the top cover of the skeleton abuts against the upper mold, and is fixedly connected to the cavity under the abutment of the upper mold.

[0012] Optionally, the circumferential side surface of the mold core is provided with several sealing ribs.

[0013] Optionally, the top surface of the lower mold is provided with a plurality of guide posts, and the upper mold is provided with guide holes adapted to the guide posts, the height of the guide posts being adapted to the thickness of the upper mold.

[0014] Optionally, the inner and outer sides of the legs of the frame are covered with film, and the film is made of the same material as the adhesive.

[0015] This application also provides a method for processing an intake pipe rubber joint, which, using the above-mentioned intake pipe rubber joint processing mold, further includes the following steps:

[0016] Mold installation: Assemble the lower mold and the upper mold to form a mold assembly, and install the mold assembly on the flat vulcanizing machine;

[0017] Mold preheating: Heat the mold assembly to a set temperature and maintain the temperature;

[0018] Frame pretreatment: Apply a pre-set thickness of film to the inner and outer sides of the frame legs;

[0019] Skeleton installation: Place the skeleton into the cavity and fix it in place, then install the mold core;

[0020] Injection and pressurization: Add adhesive to the injection cylinder, pressurize to the preset pressure, close the mold and lock the mold assembly, and inject the adhesive into the cavity through the injection port at the preset injection pressure and combine with the skeleton;

[0021] Vulcanization molding: The rubber compound is kept in a locked state for a preset time until it vulcanizes and forms a rubber product.

[0022] Demolding: Open the mold, remove the mold core and the rubber product together, and then remove the rubber product from the mold core.

[0023] Optionally, after the demolding step, the method further includes:

[0024] Trimming: Removing the burrs formed when the rubber compound is squeezed into the ejector groove.

[0025] Optionally, when the preset thickness of the adhesive film attached to the inner and outer sides of the skeleton support is 1-2 mm, the preset temperature is 170±5℃, the preset pressure is 10MPa, the preset injection pressure is 5MPa, and the preset duration is 8 minutes.

[0026] Optionally, when the preset thickness of the adhesive film attached to the inner and outer sides of the skeleton support is 0.3mm, the preset temperature is 165±5℃, the preset pressure is 15MPa, the preset injection pressure is 10MPa, and the preset duration is 10 minutes.

[0027] Optionally, the skeleton preprocessing step further includes:

[0028] The pre-formed film of a preset thickness is cut to a size of 200*20mm, and the cut film is attached to the inner and outer sides of the frame legs. The film and the adhesive are made of the same material.

[0029] Compared with the prior art, the technical solution provided in this application has the following advantages:

[0030] The aforementioned intake pipe rubber joint processing mold, by setting positioning holes on the lower mold and positioning protrusions on the mold core that match the positioning holes, allows the mold core to be coaxially positioned with the cavity. The precision of the mold fit ensures the uniform distribution of the rubber material, effectively reducing flash caused by eccentric forces, and providing stable support for the plastic skeleton. To further optimize the rubber injection process, the mold also includes an injection cylinder and a cylinder head. The injection cylinder, located on the upper mold, has a receiving cavity for holding the rubber material and an injection port for injecting the rubber into the cavity. Driven by external force, the cylinder head moves towards the bottom of the injection cylinder, and the rubber material is evenly and stably squeezed into the cavity, avoiding deformation of the plastic skeleton due to excessive injection impact force. This is particularly suitable for thinner plastic skeleton parts. The stable injection process also ensures that the rubber material is fully filled in the cavity, thereby improving the quality of the product.

[0031] At key joints in the mold, ejector grooves are designed to collect excess extruded material. These grooves are located at the connections between the lower and upper molds, the upper mold and the injection cylinder, and the mold core and the injection cylinder. This design controls the flow and distribution of excess material, making the connection between the flash near the groove edge and the finished product extremely thin, much thinner than the thickness of the excess material within the groove, thus creating a natural weak point. The flash breaks easily during peeling, reducing trimming difficulty and preventing damage to the finished product surface. This design also effectively prevents flash from spreading into the cavity, further ensuring the surface quality and dimensional accuracy of the finished product. The thin flash design reduces trimming difficulty and processing time, improving production efficiency.

[0032] The aforementioned method for processing intake pipe rubber joints, by attaching rubber sheets of the same material as the rubber compound to the inner and outer sides of the frame legs, not only enhances the strength of the frame but also reduces the direct impact of high-temperature, high-pressure injection on the frame, making the frame more stable during processing. This method is suitable for frames of different specifications and materials. Simultaneously, the mold design incorporates a material ejection groove, providing space to accommodate excess rubber compound, effectively controlling flash formation, and simplifying and improving the trimming process, thus increasing processing efficiency. Attached Figure Description

[0033] Figure 1 A cross-sectional structural schematic diagram of the intake pipe rubber joint processing mold provided in an embodiment of this application;

[0034] Figure 2 A schematic cross-sectional view of the intake pipe rubber joint processing mold provided in an embodiment of this application, without the skeleton being placed inside;

[0035] Figure 3 for Figure 2 A schematic diagram of a partial cross-sectional structure of region B in the middle section;

[0036] Figure 4 A schematic diagram of the skeleton structure of the intake pipe rubber joint processing mold provided in an embodiment of this application;

[0037] Figure 5 A schematic cross-sectional view of the skeleton structure of the intake pipe rubber joint processing mold provided in an embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the skeleton of the intake pipe rubber joint processing mold provided in an embodiment of this application, with the adhesive film attached.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-Upper mold; 2-Lower mold; 21-Positioning hole; 22-Positioning groove; 3-Mold core; 31-Positioning protrusion; 32-Sealing rib; 4-Frame; 41-Upper edge protrusion of top cover; 42-Lower edge of top cover; 5-Cavity; 6-Injection cylinder; 61-Injection port; 7-Cylinder cover; 71-Abutting part; 8-Removal groove; 9-Film. Detailed Implementation

[0041] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0047] See Figures 1 to 3 An embodiment of the present invention provides a processing mold for an intake pipe rubber joint, including an upper mold 1, a lower mold 2, a mold core 3, and a skeleton 4. The upper mold 1, lower mold 2, and mold core 3 together form a cavity 5 for receiving rubber material, and the skeleton 4 is disposed within the cavity 5.

[0048] The lower mold 2 is provided with a positioning hole 21, and the mold core 3 is provided with a positioning protrusion 31 that matches the positioning hole 21. The mold core 3 is coaxially arranged with the cavity 5 through the positioning protrusion 31.

[0049] The rubber vulcanizing mold also includes an injection cylinder 6 and a cylinder cover 7. The injection cylinder 6 is set on the upper mold 1. The injection cylinder 6 has a receiving cavity for receiving rubber material and an injection port 61 for injecting rubber into the cavity 5.

[0050] The cylinder cover 7 is mounted on the injection cylinder 6. The cylinder cover 7 has an abutting part 71 that is adapted to the receiving cavity. Under the drive of external force, the cylinder cover 7 moves toward the injection cylinder 6 until the abutting part 71 abuts against the bottom of the receiving cavity, so as to squeeze the glue material in the receiving cavity into the cavity 5 through the glue injection port 61.

[0051] The lower mold 2 and the upper mold 1 are connected at one end near the cavity 5, the upper mold 1 and the injection cylinder 6 are connected at one end near the cavity 5, and the mold core 3 and the injection cylinder 6 are connected at one end near the cavity 5. The ejector groove 8 is used to accommodate the extruded rubber material.

[0052] The mold for processing air intake pipe rubber joints provided in this embodiment, by setting a positioning hole 21 on the lower mold 2 and a positioning protrusion 31 on the mold core 3 that matches the positioning hole 21, allows the mold core 3 to be coaxially arranged with the cavity 5. The precision of the mold fit ensures the uniformity of the rubber material distribution, effectively reducing flash caused by eccentric force, and providing stable support for the plastic skeleton 4. To further optimize the rubber material injection process, the mold also includes an injection cylinder 6 and a cylinder cover 7. The injection cylinder 6 is set on the upper mold 1 and has a receiving cavity for receiving the rubber material and an injection port 61 for injecting the rubber material into the cavity 5. By driving the cylinder cover 7 to move towards the bottom of the injection cylinder 6 by external force, the rubber material is uniformly and stably squeezed into the cavity 5, avoiding deformation of the plastic skeleton 4 due to excessive injection impact force, which is particularly suitable for thinner plastic skeleton 4 parts. The stable injection process also ensures that the rubber material is fully filled in the cavity 5, thereby improving the quality of the product.

[0053] At key joints of the mold, ejector grooves 8 are designed to accommodate excess extruded material. These ejector grooves 8 are located at the connections between the lower mold 2 and the upper mold 1, the upper mold 1 and the injection cylinder 6, and the mold core 3 and the injection cylinder 6. This design controls the flow and distribution of excess material, making the connection between the flash near the groove edge and the processed product extremely thin, much thinner than the thickness of the excess material within the groove, thus creating a natural weak point. The flash can easily break off during peeling, reducing trimming difficulty and avoiding damage to the finished product surface. This design also effectively prevents flash from spreading into the cavity 5, further ensuring the surface quality and dimensional accuracy of the finished product. The thin flash design reduces trimming difficulty and processing time, improving production efficiency.

[0054] See Figure 3 , Figure 5 and Figure 6 The intake pipe rubber joint processing mold provided in this embodiment has a positioning groove 22 on the lower mold 2. The positioning groove 22 is adapted to the outer ring of the top cover of the skeleton 4 and the upper edge protrusion 41 of the top cover. After the skeleton 4 is installed into the cavity 5, the lower edge 42 of the top cover of the skeleton 4 abuts against the upper mold 1 and is fixedly connected to the cavity 5 under the abutment of the upper mold 1.

[0055] The intake pipe rubber joint processing mold provided in this embodiment uses a positioning groove 22 on the lower mold 2 to precisely position and stably assemble the skeleton 4 into the cavity 5. The structural design of the positioning groove 22 is adapted to the outer ring and upper edge protrusion of the top cover of the skeleton 4, ensuring that the skeleton 4 can be quickly and accurately embedded into the mold, thereby avoiding the problem of the skeleton 4 shifting or loosening during the assembly process. After the skeleton 4 is installed into the cavity 5, the lower edge of its top cover is in close contact with the bottom surface of the upper mold 1. This design firmly fixes the skeleton 4 in the cavity 5 through the pressing action of the upper mold 1. This fixing method not only ensures the stability of the skeleton 4 during the vulcanization molding process, but also effectively prevents the skeleton 4 from shifting or deforming due to high temperature and high pressure environment, further ensuring the quality and consistency of the processed products.

[0056] See Figure 3 The intake pipe rubber joint processing mold provided in this embodiment has several sealing ribs 32 on the circumferential side of the mold core 3. By setting several sealing ribs 32 on the circumferential side of the mold core 3, the rubber material can be evenly filled around the mold core 3 during processing, thereby forming a raised structure that matches the sealing ribs 32 on the inner side of the product. On the one hand, the raised structure on the inner side can enhance the sealing performance between the rubber joint and the connector. By increasing the contact area and local compressibility, the joint is more secure and reliable during assembly and use. On the other hand, this raised design can improve the durability and deformation resistance of the product, significantly reducing the risk of joint loosening or deformation when facing complex working conditions (such as high temperature, high pressure, or frequent vibration).

[0057] The intake pipe rubber joint processing mold provided in this embodiment has several guide pillars on the top surface of the lower mold 2 and guide holes adapted to the guide pillars in the upper mold 1. The height of the guide pillars is adapted to the thickness of the upper mold 1. By setting several guide pillars on the top surface of the lower mold 2 and designing guide holes adapted to the guide pillars in the upper mold 1, precise guidance and positioning of the mold during assembly and processing are achieved. The height of the guide pillars is adapted to the thickness of the upper mold 1, which structurally ensures precise alignment when the mold is closed. The cooperation between the guide pillars and the guide holes provides a precise guiding function for mold assembly, effectively avoiding misalignment problems that may occur between the upper mold 1 and the lower mold 2 during assembly. If such misalignment problems are not avoided, it may lead to irregularity of the cavity 5 or insufficient sealing performance, thereby affecting the quality of the processed product. Through the action of the guide pillars and guide holes, the upper and lower molds 2 can maintain a stable and precise docking, thereby ensuring the integrity of the shape of the cavity 5 and the uniformity of the rubber filling.

[0058] See Figure 6In this embodiment, the intake pipe rubber joint processing mold has adhesive sheets 9 attached to the inner and outer sides of the support legs of the frame 4. The adhesive sheets 9 are made of the same material as the rubber compound. The adhesive sheets 9 primarily enhance the strength of the support legs of the frame 4. The support legs are crucial components of the frame 4 structure, bearing pressure and supporting the shape of the product. Under high temperature and pressure conditions, weak areas of the frame 4 are prone to deformation or damage due to concentrated stress. By attaching adhesive sheets 9 to the surface of the support legs, the overall strength and durability of the frame 4 can be improved.

[0059] Furthermore, the film 9 effectively mitigates the direct impact of the high-temperature, high-pressure adhesive on the skeleton 4. During processing, the injected adhesive applies instantaneous high pressure to the surface of the skeleton 4, which is particularly detrimental to the thinner plastic skeleton 4. After the film 9 is attached, the adhesive first fuses with the film 9 on the surface of the skeleton 4, forming a buffer layer, thereby reducing the direct force of the adhesive on the skeleton 4. This design not only protects the skeleton 4 and reduces the risk of deformation and damage, but also ensures the uniform distribution of the adhesive within the cavity 5, improving the quality of the processed product.

[0060] An embodiment of the present invention also provides a method for processing an intake pipe rubber joint, which uses the above-mentioned intake pipe rubber joint processing mold and further includes the following steps:

[0061] Mold installation: Assemble the lower mold 2 and the upper mold 1 to form a mold assembly, and install the mold assembly on the flat vulcanizing machine;

[0062] The installation of the mold assembly ensures accurate mold positioning, and its compatibility with the vulcanizing machine provides a stable processing foundation for subsequent heating, pressurization, and glue injection steps.

[0063] Mold preheating: Heat the mold assembly to the set temperature and maintain the temperature;

[0064] Preheating the mold helps improve vulcanization efficiency, allowing the rubber compound to heat up quickly and flow evenly after being injected into the cavity 5, while avoiding internal stress problems in the finished product caused by temperature differences in the mold.

[0065] Skeleton pretreatment: Apply film 9 of preset thickness to the inner and outer sides of the four legs of the skeleton;

[0066] Pre-treatment of the skeleton helps to enhance the strength of the four legs of the skeleton, avoid deformation under high temperature and high pressure conditions, and at the same time provide a buffering effect to reduce the direct impact of high pressure injection on the skeleton.

[0067] Skeleton installation: Place skeleton 4 into cavity 5 and fix it, then install mold core 3;

[0068] The precise positioning and fixation of the skeleton 4 within the cavity 5 ensures positional stability during processing, while the installation of the mold core 3 further defines the structural shape of the cavity 5, ensuring that the product meets design requirements.

[0069] Injection and pressurization: Add the adhesive to the injection cylinder 6, pressurize to the preset pressure, close the mold and lock the mold assembly, and inject the adhesive into the cavity 5 from the injection port 61 according to the preset injection pressure and combine with the skeleton 4.

[0070] Precise injection pressure and flow control ensure uniform distribution of the adhesive and full filling of the cavity 5. The adhesive adheres firmly to the skeleton 4 under pressure, improving the structural strength and sealing performance of the product.

[0071] Vulcanization molding: The rubber compound is kept in a locked state for a preset time until it vulcanizes and forms a rubber product.

[0072] Maintaining constant high temperature and pressure for a set time causes a chemical cross-linking reaction in the rubber compound's molecular structure, ultimately forming a high-strength rubber product. The mold's sealing ensures the precision and consistency of the product's shape during vulcanization.

[0073] Demolding: Open the mold, remove the mold core 3 and the rubber product together, and then remove the rubber product from the mold core 3.

[0074] The design of mold core 3 makes the demolding process more convenient, and the product shape is stable after demolding, requiring no further adjustments.

[0075] In this embodiment, by attaching film 9 of the same material as the adhesive to the inner and outer sides of the support legs of the skeleton 4, the strength of the skeleton 4 is not only enhanced, but the direct impact of high-temperature and high-pressure injection on the skeleton 4 is also reduced, making the skeleton 4 more stable during processing. At the same time, the mold design incorporates a material ejection groove 8, which provides space for accommodating excess adhesive, effectively controlling the formation of flash, simplifying and maximizing the trimming process, and resulting in a cleaner product appearance.

[0076] The intake pipe rubber joint processing method provided in this embodiment further includes, after the demolding step:

[0077] Trimming: The burrs formed when the rubber material is squeezed into the ejector groove 8 are peeled off.

[0078] The introduction of the trimming step complements the design of the ejector groove 8 mentioned earlier. Through coordinated optimization in mold design and process flow, it reduces the generation of flash at the source and efficiently removes residual flash through a convenient peeling process. This method ensures processing quality and improves production efficiency, making it suitable for mass production of high-precision air intake pipe rubber joints.

[0079] The intake pipe rubber joint processing method provided in this embodiment, when the preset thickness of the adhesive film 9 attached to the inner and outer sides of the frame 4 legs is 1-2mm, the preset temperature is 170±5℃, the preset pressure is 10MPa, the preset injection pressure is 5MPa, and the preset duration is 8 minutes.

[0080] The intake pipe rubber joint processing method provided in this embodiment has the following settings: when the preset thickness of the adhesive film 9 attached to the inner and outer sides of the frame 4 legs is 0.3mm, the preset temperature is 165±5℃, the preset pressure is 15MPa, the preset injection pressure is 10MPa, and the preset duration is 10 minutes.

[0081] The intake pipe rubber joint processing method provided in this embodiment allows for flexible adjustment of key parameters such as injection pressure, vulcanization temperature and time for different rubber sheet thicknesses, making the processing technology highly flexible and applicable to skeletons 4 of different specifications and materials.

[0082] The intake pipe rubber joint processing method provided in this embodiment further includes the following in the skeleton pretreatment step:

[0083] The pre-formed film 9, according to the preset thickness, is cut to a size of 200*20mm. The cut film 9 is then attached to the inner and outer sides of the four legs of the frame. The film 9 and the adhesive are made of the same material.

[0084] The intake pipe rubber joint processing method provided in this embodiment further improves processing accuracy and product quality by adding a cutting and attaching process for the rubber sheet 9 in the skeleton pretreatment step. This new step clarifies the size and attachment requirements of the rubber sheet 9, providing a reliable process guarantee for subsequent injection and vulcanization processes.

[0085] First, in the skeleton pre-processing step, the pre-formed film 9, according to a preset thickness, is cut to a size of 200×20mm. This standardized size design not only ensures that the film 9 can precisely fit the inner and outer sides of the four legs of the skeleton, but also improves the convenience and consistency of the processing operation. The cut film 9 can cover the key areas of the four legs of the skeleton, avoiding insufficient coverage or excessive stacking due to size mismatch, thereby further improving the standardization of product processing and the consistency of the finished product.

[0086] Next, the cut film 9 is attached to the inner and outer sides of the legs of the frame 4, ensuring close contact with the surface of the frame 4. The film 9 is made of the same material as the rubber compound, allowing it to fully fuse with the injected rubber during vulcanization, forming a strong bond. This design provides a buffer layer for the frame 4, reducing the direct impact of high-temperature, high-pressure injection on the legs, and also ensures a smooth, air-free interface between the rubber compound and the frame 4, improving the bonding strength and sealing performance of the product.

[0087] Furthermore, the material of film 9 maintains consistency with the rubber compound, ensuring chemical compatibility and structural integrity during vulcanization. After vulcanization, film 9 and the rubber compound fuse completely, resulting in a uniform internal and external structure without delamination, and exhibiting higher strength and durability at the joints. This design is particularly suitable for thin-walled or low-strength plastic skeletons 4, significantly enhancing their compressive strength and adaptability.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A mold for processing a rubber joint for an air intake pipe, comprising an upper mold (1), a lower mold (2), a mold core (3), and a skeleton (4), wherein the upper mold (1), the lower mold (2), and the mold core (3) together form a cavity (5) for receiving rubber material, and the skeleton (4) is disposed within the cavity (5), characterized in that, The lower mold (2) is provided with a positioning hole (21), and the mold core (3) is provided with a positioning protrusion (31) that matches the positioning hole (21). The mold core (3) is coaxially arranged with the cavity (5) through the positioning protrusion (31). The intake pipe rubber joint processing mold also includes an injection cylinder (6) and a cylinder cover (7). The injection cylinder (6) is disposed on the upper mold (1). The injection cylinder (6) has a receiving cavity for receiving rubber material and an injection port (61) for injecting rubber into the cavity (5). The cylinder cover (7) is disposed on the injection cylinder (6). The cylinder cover (7) has an abutment portion (71) adapted to the receiving cavity. Under the drive of external force, the cylinder cover (7) moves toward the injection cylinder (6) until the abutment portion (71) abuts against the bottom of the receiving cavity, so as to squeeze the adhesive in the receiving cavity into the cavity (5) through the injection port (61). The lower mold (2) and the upper mold (1) are connected at one end near the cavity (5), the upper mold (1) and the injection cylinder (6) are connected at one end near the cavity (5), and the mold core (3) and the injection cylinder (6) are connected at one end near the cavity (5). The ejection groove (8) is used to accommodate the extruded rubber material. The lower mold (2) is provided with a positioning groove (22). The positioning groove (22) is adapted to the outer ring of the top cover and the upper edge protrusion (41) of the top cover of the skeleton (4). After the skeleton (4) is installed in the cavity (5), the lower edge (42) of the top cover of the skeleton (4) abuts against the upper mold (1) and is fixedly connected to the cavity (5) under the abutment of the upper mold (1). The inner and outer sides of the support legs of the skeleton (4) are covered with film (9). The film (9) is made of the same material as the rubber material. The skeleton (4) is a plastic skeleton.

2. The intake pipe rubber joint processing mold according to claim 1, characterized in that, The mold core (3) has several sealing ribs (32) on its circumferential side surface.

3. The intake pipe rubber joint processing mold according to claim 1, characterized in that, The lower mold (2) has several guide pillars on its top surface, and the upper mold (1) has guide holes that are adapted to the guide pillars. The height of the guide pillars is adapted to the thickness of the upper mold (1).

4. A method for processing a rubber joint for an air intake pipe, characterized in that, The machining mold for the intake pipe rubber joint according to any one of claims 1-3 further includes the following steps: Mold installation: Assemble the lower mold (2) and the upper mold (1) to form a mold assembly, and install the mold assembly on a flat vulcanizing machine; Mold preheating: Heat the mold assembly to a set temperature and maintain the temperature; Frame pretreatment: Apply a pre-set thickness of film (9) to the inner and outer sides of the frame (4) legs; Skeleton installation: Place the skeleton (4) into the cavity (5) and fix it, then install the mold core (3); Injection and pressurization: Add adhesive to the injection cylinder (6), pressurize to the preset pressure, close the mold and lock the mold assembly, and inject the adhesive into the cavity (5) through the injection port (61) according to the preset injection pressure and combine with the skeleton (4); Vulcanization molding: The rubber compound is kept in a locked state for a preset time until it vulcanizes and forms a rubber product. Demolding: Open the mold, remove the mold core (3) and the rubber product together, and then remove the rubber product from the mold core (3).

5. The method for processing the intake pipe rubber joint according to claim 4, characterized in that, Following the demolding step, the process also includes: Trimming: The burrs formed when the rubber material is squeezed into the ejector groove (8) are peeled off.

6. The method for processing the intake pipe rubber joint according to claim 4, characterized in that, When the preset thickness of the adhesive film (9) attached to the inner and outer sides of the frame (4) legs is 1-2mm, the preset temperature is 170±5℃, the preset pressure is 10MPa, the preset injection pressure is 5MPa, and the preset duration is 8 minutes.

7. The method for processing the intake pipe rubber joint according to claim 4, characterized in that, When the preset thickness of the adhesive film (9) attached to the inner and outer sides of the frame (4) legs is 0.3mm, the preset temperature is 165±5℃, the preset pressure is 15MPa, the preset injection pressure is 10MPa, and the preset duration is 10 minutes.

8. The method for processing an intake pipe rubber joint according to claim 4, characterized in that, The skeleton preprocessing step further includes: The pre-formed film (9) according to the preset thickness is 200 Cut the film to a size of 20mm and attach the cut film (9) to the inside and outside of the support legs of the frame (4). The film (9) and the adhesive are made of the same material.

Images