Forming die for foamed aluminum composite profile

Abstract

The invention discloses a forming die for a foamed aluminum composite profile, which comprises an extrusion roller, an extrusion die and a forming die, the extrusion roller, the extrusion die and the forming die work cooperatively to realize simultaneous welding of foamed aluminum and the profile and improve the production efficiency, a conveying runner of the extrusion roller is communicated with an injection runner, so that foamed aluminum liquid is convenient to convey, and the production efficiency is improved. The profile cavity independently arranged on the periphery is used for containing the ends of profile bars, a foundation is laid for follow-up machining, the multiple profile extrusion channels surround the foamed aluminum conveying channel, the first cavity is close to the feeding port, and the feeding port is in a conical shape and facilitates inflow of foamed aluminum liquid. And the profile bar enters the forming channel through the second cavity under the action of the extrusion roller to form a cavity, and meanwhile, the foamed aluminum material liquid is fused and welded with the profile bar in the cavity. And the flow expanding cavity on the first cavity can enable the foamed aluminum liquid to be diffused more uniformly, so that the welding uniformity of the foamed aluminum and the profile is further ensured, the overall consistency of the product is improved, and the product quality is ensured.

Description

Technical Field

[0001] This application relates to the technical field of forming molds for aluminum foam composite profiles, and particularly to a forming mold for aluminum foam composite profiles. Background Art

[0002] In the safety structure of an automobile, the anti-collision beam plays a crucial role. When the vehicle is impacted, the anti-collision beam bears the brunt. By absorbing the impact energy and deforming, it minimizes the harm to the vehicle occupants caused by the impact force. If the anti-collision beam cannot withstand a strong impact, it will cause deformation of the surrounding components and even invade the interior area of the vehicle, directly threatening the lives of the driver and passengers. An ideal anti-collision beam should not only have sufficient strength and stiffness to resist the impact but also have good energy absorption and buffering effects to maximize the safety of the vehicle occupants at critical moments.

[0003] The composite profile anti-collision beam filled with aluminum foam combines the characteristics of aluminum foam such as light weight and high energy absorption with the high strength of the profile, showing broad market prospects. However, when producing such anti-collision beams, the currently commonly used direct filling and secondary foaming methods have many deficiencies.

[0004] For the composite profiles produced by the direct filling method, the connection between the aluminum foam and the profile mainly relies on glue or bolts. However, this connection method has obvious defects, and there will be relatively large gaps between the two materials. During the actual driving of the vehicle, especially when encountering bumps or impacts, the existence of the gaps easily causes the aluminum foam and the profile to shake. This shaking not only affects the overall stability and energy absorption effect of the anti-collision beam but may also cause component damage due to repeated friction and collision over time, reducing the service life of the anti-collision beam and thus affecting the safety performance of the vehicle.

[0005] In the foaming process of the composite profiles produced by the secondary foaming method, it is difficult to achieve uniform and stable performance of the aluminum foam material. The part close to the wall surface often has a greater density and fewer foams. This results in differences in the energy absorption, buffering, and other performances of the anti-collision beam at different parts, and the advantages of the aluminum foam cannot be fully utilized as a whole. Once the vehicle is impacted at this weak part, the protection effect of the anti-collision beam will be greatly reduced. Moreover, whether it is the direct filling method or the secondary foaming method, the size of the product is restricted by the raw materials, which to a certain extent restricts the design flexibility and diversified production of the anti-collision beam and is difficult to meet the personalized needs of different vehicle models. Summary of the Invention

[0006] In an exemplary embodiment of this application, a forming mold for aluminum foam composite profiles is provided to achieve the continuous production stability of the aluminum foam composite profiles and ensure their product performance.

[0007] The present application provides a forming die for an aluminum foam composite profile, which includes: an extrusion roller, an extrusion die, and a forming die; A conveying channel is formed inside the extrusion roller, an injection channel is arranged on the extrusion roller, the conveying channel is communicated with the injection channel, the aluminum foam material liquid is conveyed to the conveying channel through the injection channel, the conveying channel is connected with a conveying pipe, and the aluminum foam material liquid accommodated in the conveying channel is conveyed through the conveying pipe. An extrusion profile cavity is arranged on the extrusion roller, the extrusion profile cavity is arranged around the periphery of the conveying channel and is independently arranged from the conveying channel, and the end of the profile bar is accommodated in the extrusion profile cavity; An extrusion profile channel and an aluminum foam conveying channel are arranged on the extrusion die. The aluminum foam conveying channel is located in the middle of the extrusion die and is arranged in a through manner. A feeding port is arranged at the end of the extrusion die, the feeding port is communicated with the aluminum foam conveying channel, the aluminum foam conveying channel corresponds to the conveying pipe and the end of the conveying pipe is accommodated in the aluminum foam conveying channel. The extrusion profile channel is arranged around the periphery of the aluminum foam conveying channel and is arranged in a through manner, and the extrusion profile channel corresponds to the extrusion profile cavity; The forming die forms a first cavity and a second cavity. The first cavity is arranged around the periphery of the second cavity. The first cavity and the second cavity are spaced apart in the axial direction of the forming die and the first cavity is arranged closer to the feeding port side. The feeding port corresponds to the first cavity, and the extrusion profile channel corresponds to the second cavity. The profile bars conveyed by each extrusion profile channel form a cavity under the extrusion of the first cavity, and the aluminum foam material liquid conveyed by the aluminum foam conveying channel fuses in the cavity and welds the profile bars surrounding the cavity.

[0008] Further, a forming channel is arranged inside the first cavity, the first cavity is communicated with the forming channel, and the profile bar enters the forming channel through the second cavity under the extrusion action of the extrusion roller and fits against the inner wall of the forming channel to form the cavity.

[0009] Further, at least part of the feeding port extends into the inside of the forming channel.

[0010] Further, a flow expansion cavity is formed on the first cavity, the flow expansion cavity is communicated with the first cavity and extends horizontally towards the second cavity.

[0011] Further, both the first cavity and the second cavity are recessed on the end face of the forming die facing the extrusion die.

[0012] Further, the width dimension of the profile extrusion channel on the side close to the aluminum foam conveying channel is smaller than the width dimension of the profile extrusion channel on the side far from the aluminum foam conveying channel.

[0013] Further, the feeding port is arranged in a conical shape, and the outer diameter dimension of the outer wall of the feeding port gradually decreases along the direction pointing to the first cavity.

[0014] Further, at least four of the profile extrusion channels are arranged around the periphery of the aluminum foam conveying channel.

[0015] The embodiments of the present application have the following beneficial effects: The extrusion roller, the extrusion die and the forming die work together to realize the simultaneous welding of the aluminum foam and the profile, improving the production efficiency. The conveying channel of the extrusion roller is communicated with the injection channel, facilitating the conveying of the aluminum foam material liquid. The independently arranged profile cavity on its periphery is used to accommodate the end of the profile bar, laying a foundation for subsequent processing. A plurality of profile extrusion channels surround the aluminum foam conveying channel, and the width of the profile extrusion channel on the side close to the aluminum foam conveying channel is small, which can apply a uniform extrusion force to the profile bar, ensuring the shape accuracy and quality stability of the profile during the extrusion process. The first cavity is close to the feeding port, and the conical shape of the feeding port is conducive to the inflow of the aluminum foam material liquid. The profile bar enters the forming channel through the second cavity under the action of the extrusion roller to form a cavity, and at the same time, the aluminum foam material liquid fuses and welds with the profile bar in the cavity. The flow expansion cavity on the first cavity can make the aluminum foam material liquid diffuse more evenly, further ensuring the uniformity of the welding of the aluminum foam and the profile, thereby improving the overall consistency of the product and guaranteeing the product quality. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Exemplarily shows an exploded structural schematic diagram of a forming die for an aluminum foam composite profile provided by an embodiment of the present application; Figure 2 Exemplarily shows a cross-sectional structural schematic diagram of a forming die for an aluminum foam composite profile provided by an embodiment of the present application; Figure 3 Exemplarily shows a structural schematic diagram of the forming die provided by an embodiment of the present application. Detailed Embodiments

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application.

[0019] To further illustrate the technical solutions provided by the embodiments of this application, the following provides a detailed description in conjunction with the accompanying drawings and specific implementation manners. Although the embodiments of this application provide method operation steps as shown in the following embodiments or accompanying drawings, more or fewer operation steps may be included in the method based on routine or non-creative labor. In steps where there is no necessary causal relationship logically, the execution order of these steps is not limited to the execution order provided by the embodiments of this application.

[0020] Referring Figures 1 - 3 As shown, this application provides a forming die 30 for aluminum foam composite profiles, which includes: an extrusion roller 10, an extrusion die 20, and a forming die 30.

[0021] A conveying channel 11 is formed inside the extrusion roller 10. An injection channel 12 is provided on the extrusion roller 10. The conveying channel 11 is in communication with the injection channel 12. The aluminum foam material liquid is transported to the inside of the conveying channel 11 through the injection channel 12. The conveying channel 11 is connected to a conveying pipe 13. The aluminum foam material liquid contained in the conveying channel 11 is transported through the conveying pipe 13. A profile cavity 14 is provided on the extrusion roller 10. The profile cavity 14 is arranged around the periphery of the conveying channel 11 and is independently arranged from the conveying channel 11. The end of the profile bar is accommodated in the profile cavity 14.

[0022] The conveying channel 11 is an important structure inside the extrusion roller 10, and it undertakes the key task of transporting the aluminum foam material liquid in the entire system. The conveying channel 11 is in communication with the injection channel 12, providing a channel for the aluminum foam material liquid to enter the inside of the extrusion roller 10 from the outside and be further transported out.

[0023] It is connected to the conveying pipe 13, and the aluminum foam material liquid contained therein can be smoothly transported through the conveying pipe 13 to subsequent processing links, such as the aluminum foam conveying channel 22 of the extrusion die 20, and then participate in the forming process of the aluminum foam composite profile.

[0024] The purpose of setting the conveying channel 11 is to ensure that the aluminum foam material liquid can flow stably and efficiently in the die system, avoid problems such as blockage and leakage, and ensure the continuity and stability of the material liquid transportation, which is crucial for ensuring the consistency of product quality.

[0025] The stable conveying channel 11 enables the aluminum foam material liquid to uniformly enter the subsequent processing area, which is conducive to fully integrating with the profile bar during the forming process, avoiding product defects caused by uneven distribution of the material liquid, and improving the quality and performance of the product.

[0026] The injection runner 12 is a bridge connecting the external aluminum foam liquid source and the conveying runner 11 of the extrusion roller 10. Its main function is to introduce the aluminum foam liquid into the conveying runner 11 of the extrusion roller 10. The precisely controlled injection runner 12 can improve the flexibility and controllability of production and adapt to diverse production requirements. At the same time, a good injection effect can avoid phenomena such as splashing and turbulence of the liquid during injection, ensure the smooth entry of the liquid into the conveying runner 11, and thus improve production efficiency and product quality.

[0027] The profile cavity 14 surrounds the periphery of the conveying runner 11 and is independently arranged relative to the conveying runner 11. Its main function is to accommodate the end of the profile bar and provide positioning and preliminary fixing for the profile bar. During the forming process, the end of the profile bar is placed in the profile cavity 14, and under the action of the extrusion roller 10, the profile bar can be conveyed and extruded along a specific path.

[0028] The purpose of setting the profile cavity 14 is to ensure that the profile bar has an accurate position and attitude when entering the subsequent processing links, and ensure that the relative position relationship between each profile bar meets the design requirements, which has an important impact on the shape and dimensional accuracy of the final product.

[0029] The independently arranged profile cavity 14 avoids the mutual interference between the profile bar and the aluminum foam liquid during the conveying process, ensures the stability of the conveying processes of both, and is beneficial to improving product quality and production efficiency. On the extrusion die 20, a profile extrusion channel 21 and an aluminum foam conveying channel 22 are provided. At least four profile extrusion channels 21 are arranged around the periphery of the aluminum foam conveying channel 22. The aluminum foam conveying channel 22 is located in the middle of the extrusion die 20 and is through. A feeding port 23 is provided at the end of the extrusion die 20. The feeding port 23 is connected to the aluminum foam conveying channel 22. At least a part of the feeding port 23 extends into the interior of the forming channel 34. The feeding port 23 is conically arranged, and the outer diameter of the outer wall of the feeding port 23 gradually decreases in the direction pointing to the first cavity 31.

[0030] The aluminum foam conveying channel 22 corresponds to the conveying pipe 13, and the end of the conveying pipe 13 is accommodated in the aluminum foam conveying channel 22. The profile extrusion channel 21 is arranged around the periphery of the aluminum foam conveying channel 22 and the profile extrusion channel 21 is through. The profile extrusion channel 21 corresponds to the profile cavity 14.

[0031] A plurality of profile extrusion channels 21 surrounding the aluminum foam conveying channel 22 are provided on the extrusion die 20. These channels correspond to the profile cavities 14 on the extrusion rollers 10 and are used to receive and further extrude the profile billets. Their through - setting allows the profile billets to pass through smoothly, and the width on the side close to the aluminum foam conveying channel 22 is smaller than that on the far side. This design can apply different pressures to the profile billets during extrusion, enabling them to better enclose and form a cavity, preparing for subsequent fusion with the aluminum foam liquid.

[0032] The aluminum foam conveying channel 22 located in the middle of the extrusion die 20 and through - connected is correspondingly connected to the conveying pipe 13, and can accurately convey the aluminum foam liquid from the conveying flow channel 11 of the extrusion rollers 10 to the designated position of the forming die 30. The feeding port 23 at the end is conical, and the outer diameter gradually decreases along the direction pointing to the first cavity 31, and part of it extends into the forming channel 34. Such a design can make the aluminum foam liquid converge better during transportation and smoothly enter the first cavity 31 of the forming die 30, ensuring that the liquid can be fully fused and welded with the profile billets subsequently.

[0033] The conical structure of the feeding port 23 guides the aluminum foam liquid to smoothly transition from the aluminum foam conveying channel 22 of the extrusion die 20 to the first cavity 31, reducing the turbulence or splashing caused by sudden changes in the flow direction, avoiding bubbles or cavity filling defects caused by uneven flow velocity. The design of the gradually decreasing outer diameter makes the flow cross - sectional area of the liquid gradually decrease, forming a natural pressure gradient, reducing the flow resistance of the liquid entering the first cavity 31, and improving the filling efficiency. The inclined surface of the conical outer wall causes the liquid to spread outward when entering the first cavity 31, covering the cavity area enclosed by the profile billets, ensuring that the aluminum foam liquid evenly fills each part of the cavity and avoiding local accumulation or unfilled problems.

[0034] By arranging the profile extrusion channels 21 around the aluminum foam conveying channel 22, with the cooperation of the forming die 30, the profile billets conveyed from the profile extrusion channels 21 can enclose and form a cavity under the extrusion of the first cavity 31, and the liquid conveyed from the aluminum foam conveying channel 22 can be fused and welded with the profile billets in the cavity, thus completing the preliminary forming of the aluminum foam composite profile and achieving the purpose of simultaneously welding the aluminum foam and the profile.

[0035] The feeding port 23 is conical, and the outer diameter of its outer wall gradually decreases along the direction pointing to the first cavity 31. This shape design enables the aluminum foam liquid to produce a converging effect when entering the first cavity 31 from the feeding port 23, flowing into the first cavity 31 concentratedly and efficiently. The flow - expanding cavity 33 is connected to the first cavity 31 and extends horizontally towards the second cavity 32. The liquid guided by the conical feeding port 23 can enter the flow - expanding cavity 33 more accurately, providing a prerequisite for the flow - expanding cavity 33 to play its role.

[0036] After the feeding port 23 conveys the material liquid to the first cavity 31, the flow expansion cavity 33 further guides the diffusion of the material liquid. The conical feeding port 23 concentrates the input material liquid. Under the action of the flow expansion cavity 33, the material liquid can be better horizontally diffused in the first cavity 31, and then more evenly fills the cavity formed by surrounding the profile bar. The two cooperate with each other, making the distribution of the aluminum foam material liquid in the first cavity 31 more uniform and the contact with the profile bar more sufficient, which is beneficial to improving the fusion and welding effect of the aluminum foam and the profile bar and ensuring the forming quality of the composite profile.

[0037] The forming die 30 forms the first cavity 31 and the second cavity 32. The first cavity 31 is arranged around the periphery of the second cavity 32. The first cavity 31 and the second cavity 32 are arranged at intervals in the axial direction of the forming die 30, and the first cavity 31 is arranged closer to the feeding port 23 side. Both the first cavity 31 and the second cavity 32 are recessed on the end face of the forming die 30 facing the extrusion die 20. The feeding port 23 corresponds to the first cavity 31, and the profile extrusion channel 21 corresponds to the second cavity 32. The profile bars conveyed by each profile extrusion channel 21 surround to form a cavity under the extrusion of the first cavity 31. The aluminum foam material liquid conveyed by the aluminum foam conveying channel 22 fuses in the cavity and welds the profile bars surrounding the cavity.

[0038] The width dimension of the profile extrusion channel 21 on the side close to the aluminum foam conveying channel 22 is smaller than the width dimension of the profile extrusion channel 21 on the side far from the aluminum foam conveying channel 22.

[0039] The narrow side design close to the aluminum foam conveying channel 22 restricts the offset of the profile bar towards the central area, preventing it from getting too close to the flow path of the aluminum foam material liquid during the extrusion process and avoiding interfering with the filling of the core material. The wide side far from the aluminum foam conveying channel 22 provides an expansion space for the profile bar, enabling it to evenly extend outwards during the extrusion process and fit the inner wall of the forming channel 34 to form a regular cavity framework.

[0040] The narrow side channel increases the resistance of the profile bar to move towards the center by reducing the flow cross-sectional area, thereby preventing the aluminum foam material liquid from reversely infiltrating into the profile extrusion channel 21, maintaining the independent transmission paths of the two materials until the preset fusion area. By restricting the premature contact between the profile and the aluminum foam, it ensures that the two only combine within the cavity area of the forming die 30, improving the integrity and strength of the interface combination. The width gradient design cooperates with multiple circumferentially evenly distributed profile extrusion channels 21, enabling each profile bar to form a symmetric cavity structure during the expansion process, providing a regular space for the uniform filling of the aluminum foam.

[0041] The interior of the first cavity 31 is provided with a forming channel 34. The first cavity 31 is in communication with the forming channel 34. The profile bar stock enters the forming channel 34 through the second cavity 32 under the extrusion action of the extrusion roller 10 and adheres to the inner wall of the forming channel 34 to form a cavity.

[0042] A flow expansion cavity 33 is formed on the first cavity 31. The flow expansion cavity 33 is in communication with the first cavity 31 and extends horizontally toward the second cavity 32.

[0043] The forming die 30 is provided with a first cavity 31 and a second cavity 32. The second cavity 32 corresponds to the profile extrusion channel 21, so that the profile bar stock can enter the forming channel 34 inside the first cavity 31 under the action of the extrusion roller 10. The profile bar stock adheres to the inner wall of the forming channel 34 during this process, enclosing to form a cavity, providing space for the subsequent injection of the aluminum foam liquid, and ensuring that the internal structure of the composite profile meets the design requirements.

[0044] The first cavity 31 is recessed in the end face of the forming die 30 facing the extrusion die 20, is arranged around the periphery of the second cavity 32, and is close to the feeding port 23 side of the extrusion die 20. The first cavity 31 corresponds to the position of the feeding port 23, and is internally provided with a forming channel 34 and a flow expansion cavity 33, receives the aluminum foam liquid from the feeding port 23 of the extrusion die 20, and guides it to fill the cavity formed by the surrounding profile bar stock. The flow range of the liquid is expanded through the cavity space to ensure that the aluminum foam is evenly distributed inside the cavity and is in full contact with the profile bar stock. By using the geometric constraint of the first cavity 31, the aluminum foam liquid forms a shape matching the core of the target composite profile during the filling process. Through the guiding action of the inner wall of the forming channel 34, the disordered diffusion of the liquid is restricted, and the dimensional accuracy of the core material is guaranteed.

[0045] The second cavity 32 is recessed in the end face of the forming die 30, is arranged at an interval from the first cavity 31 in the axial direction, and is close to the extrusion roller 10 side. The second cavity 32 corresponds to the profile extrusion channel 21 of the extrusion die 20 and is in communication with the forming channel 34. It receives the profile bar stock from the profile extrusion channel 21, restricts its movement path through the cavity space, guides it to adhere to the inner wall of the forming channel 34, provides a preforming transition zone for the profile bar stock, relieves the stress concentration generated during the extrusion process, and avoids material deformation or fracture. Through the geometric design of the second cavity 32, multiple profile bar stocks enclose a regular cavity structure under the extrusion action, providing a space basis for the subsequent aluminum foam filling. The circumferentially symmetrically distributed profile bar stocks form a uniform support skeleton around the cavity, improving the overall mechanical properties of the composite profile.

[0046] The first cavity 31 is close to the feeding port 23. The feeding port 23 corresponds to the first cavity 31. The foamed aluminum liquid material from the foamed aluminum conveying channel 22 enters the first cavity 31 through the feeding port 23. Inside the first cavity 31, the liquid material flows into the cavity formed by surrounding the profile bar stock, achieving fusion with the profile bar stock, and welding together the profile bar stocks surrounding the cavity, thereby forming a foamed aluminum composite profile and achieving the combined molding of the two materials.

[0047] An expansion cavity 33 is provided on the first cavity 31. It is connected to the first cavity 31 and extends horizontally towards the second cavity 32. The existence of the expansion cavity 33 helps the foamed aluminum liquid material to spread more evenly in the first cavity 31, enabling the liquid material to better fill the cavity formed by the profile bar stock, further ensuring sufficient contact between the liquid material and the profile bar stock, improving the fusion and welding effects, and guaranteeing the forming quality of the composite profile.

[0048] Through the design of the horizontally extending expansion cavity 33, the foamed aluminum liquid material is guided to spread outwards when filling the cavity, eliminating the flow dead zone and avoiding local unfilled defects. The gradually expanding structure reduces the flow resistance of the liquid material, improves the filling efficiency, and at the same time reduces the risk of bubble generation. The expanding space of the expansion cavity 33 provides a buffer area for the liquid material, balancing the pressure fluctuations generated during the extrusion process, and ensuring that the liquid material evenly fills each area of the cavity. As a functional extension of the first cavity 31, the expansion cavity 33 converts the axial transportation of the liquid material into radial expansion, ensuring seamless connection between the filling process and the cavity structure of the profile bar stock.

[0049] This application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to this application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0050] These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing devices to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device that implements the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0051] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions for implementing the functions specified in one process or a plurality of processes and / or blocks Figure 1 one process or a plurality of processes and / or blocks Figure 1 steps of the functions specified in one block or a plurality of blocks.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A forming die for a foam aluminum composite profile, characterized in that: It includes: Extrusion roller, extrusion die, forming die; A conveying channel is formed inside the extrusion roller, an injection channel is arranged on the extrusion roller, the conveying channel is connected with the injection channel, the foamed aluminum liquid is conveyed to the conveying channel through the injection channel, the conveying channel is connected with a conveying pipe, the foamed aluminum liquid contained in the conveying channel is conveyed through the conveying pipe, a profile cavity is arranged on the extrusion roller, the profile cavity is arranged around the periphery of the conveying channel and the profile cavity and the conveying channel are arranged independently of each other, and the profile cavity is used to contain the end of the profile bar; The extrusion die is provided with a profile extrusion channel and a foam aluminum conveying channel, the foam aluminum conveying channel is located in the middle of the extrusion die and is arranged through, a feeding port is arranged at the end of the extrusion die, the feeding port is connected with the foam aluminum conveying channel, the foam aluminum conveying channel corresponds to the conveying pipe and the end of the conveying pipe is accommodated in the foam aluminum conveying channel, the profile extrusion channel is arranged around the periphery of the foam aluminum conveying channel and the profile extrusion channel is arranged through, and the profile extrusion channel is arranged corresponding to the profile cavity; The forming die forms a first cavity and a second cavity, the first cavity is arranged around the periphery of the second cavity, the first cavity and the second cavity are spaced apart in the axial direction of the forming die, and the first cavity is arranged close to the feeding port, the feeding port corresponds to the first cavity, and the profile extrusion channel corresponds to the second cavity. The profile rods conveyed by each of the profile extrusion channels are extruded by the first cavity to form a cavity, and the foamed aluminum liquid conveyed by the foamed aluminum conveying channel is fused in the cavity and welds the profile rods surrounding the cavity.

2. The forming die for foam aluminum composite profile according to claim 1, characterized in that: A forming channel is arranged inside the first cavity, and the first cavity is connected with the forming channel. Under the extrusion action of the extrusion roller, the profile bar enters into the forming channel through the second cavity and adheres to the inner wall of the forming channel to form the cavity.

3. The forming die for foam aluminum composite profile according to claim 2, characterized in that: The feeding port at least partially extends into the interior of the molding channel.

4. The forming die for foam aluminum composite profile according to claim 3, characterized in that: A flow expansion cavity is formed on the first cavity, the flow expansion cavity is communicated with the first cavity and extends toward the second cavity along a horizontal direction.

5. The forming die for foam aluminum composite profile according to claim 4, characterized in that: The first cavity and the second cavity are both recessed and formed on the end surface of the molding die facing the extrusion die.

6. The forming die for foam aluminum composite profile according to claim 5, characterized in that: The width dimension of the profile extrusion channel on a side close to the foam aluminum conveying channel is smaller than the width dimension of the profile extrusion channel on a side away from the foam aluminum conveying channel.

7. The forming die for foam aluminum composite profile according to claim 6, characterized in that: The feeding port is arranged in a cone shape, and the outer diameter of the outer wall of the feeding port gradually decreases along the direction pointing to the first cavity.

8. The forming die for foam aluminum composite profile according to claim 7, characterized in that: At least four of the profile extrusion channels are arranged around the periphery of the foam aluminum conveying channel.

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