An aluminum profile extrusion die

Abstract

An aluminum profile extrusion die, belonging to the technical field of aluminum profile extrusion die technology, includes an outer die and an inner die, which are assembled to form the extrusion die. The outer die has a centrally located cavity with a flow divider bridge inside. The flow divider bridge has a hollow structure, and the cavity forms flow divider holes through the flow divider bridge. A die core is centrally located on the inner side of the flow divider bridge. A welding chamber is centrally located on the side of the inner die that is in contact with the outer die, and a die hole is located on the other side of the inner die. The die hole communicates with the welding chamber, and a working strip is provided between them. Multiple reinforcing blocks are provided on the outer side of the working strip. In this invention, the trapezoidal and circular reinforcing blocks on the outer side of the working strip precisely target areas of concentrated extrusion pressure, such as along the length direction and at bends, specifically enhancing the strength of the working strip, preventing deformation, extending the die's service life, and ensuring long-term die accuracy. Furthermore, the external die through-hole connects with the flow divider bridge, aiding in cooling and reducing defects such as bubbles and cracks inside the profile.

Description

Technical Field

[0001] This utility model belongs to the field of aluminum profile extrusion die technology, and specifically relates to an aluminum profile extrusion die. Background Technology

[0002] As the core equipment for hollow aluminum profile extrusion, the structural design of the flow-dividing combination mold directly determines the quality of the finished profile and the production efficiency. Currently, the industry generally achieves hollow profile forming through the synergistic effect of the outer mold flow-dividing and the inner mold welding.

[0003] Chinese invention patent CN119771944A discloses a wear-resistant aluminum profile extrusion die. It addresses the issue that after prolonged use, heat buildup inside the die can lead to excessively high temperatures, affecting not only the forming quality of the aluminum profile (causing dimensional deviations and increased surface roughness) but also reducing the die's lifespan. The solution involves a clamping rod, extrusion plate, and clamping head. In this device, the heated aluminum profile is forced into the die from the left side of the left mold by external force. The metal flows into each diversion hole, further compressing the extrusion plate and making the locking head fit more tightly into the locking groove. The metal exerts a rightward thrust on the right mold, causing the locking rod to move to the right and compress the locking head downward. However, because the metal in the diversion hole compresses the extrusion plate, it prevents the locking head from moving inward, forming a self-locking mechanism. This achieves the purpose of further self-locking of the left and right molds after the fixing frame has fixed them, ensuring that there are no gaps between the left and right molds during use, guaranteeing the quality of aluminum profile processing, and reducing the defect rate.

[0004] However, existing extrusion dies still face many technical challenges in practical applications. Regarding die strength, the extrusion pressure is concentrated on the working zone during the extrusion process. Especially for complex cross-section profiles, deformation easily occurs at bends and weak areas of the working zone, leading to deviations in profile dimensional accuracy and even die failure. As a key forming component, the die core, without proper structural optimization, is prone to insufficient rigidity under high pressure, resulting in obstructed metal flow, increased risk of die blockage and clogging, and heat accumulation in the flow divider area can easily lead to thermal fatigue cracks in the die, shortening its service life. Traditional dies lack efficient heat dissipation channel designs, restricting continuous production efficiency. This paper addresses the aforementioned problems of insufficient die strength, low assembly accuracy, uneven metal flow, and poor heat dissipation. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] To address the problems mentioned in the background section, the present invention adopts the following technical solution.

[0007] An aluminum profile extrusion die includes an outer die and an inner die, which are assembled to form an extrusion die. The outer die has a cavity in the center, and a flow divider bridge is provided in the cavity. The flow divider bridge has a hollow structure, and the cavity forms a flow divider hole through the flow divider bridge. A die core is provided in the center of the inner side of the flow divider bridge. A welding chamber is provided in the center of the side of the inner die that is in contact with the outer die, and a die hole is provided on the other side of the inner die. The die hole and the welding chamber are connected, and a working strip is provided between the two. Multiple reinforcing blocks are provided on the outer side of the working strip.

[0008] Preferably, multiple through holes are provided on the sidewall of the outer mold, and the through holes are symmetrically arranged on the outside of the outer mold, and the through holes are connected to the inside of the diversion bridge.

[0009] Preferably, the corners of the mold core are chamfered, and the mold core is provided with an upper open cutter located in the mold core discharge direction. The mold core is also provided with a lower open cutter located in the mold core feed direction.

[0010] Preferably, a rear cutter is provided at the rear end of the working belt, the rear cutter is in contact with the welding chamber, and the width of the rear cutter is greater than the width of the working belt.

[0011] Preferably, there are two types of reinforcing blocks: trapezoidal structure and circular structure. The trapezoidal reinforcing blocks are arranged along the length of the working belt, and the circular reinforcing blocks are arranged at the bends of the working belt.

[0012] Preferably, the outer mold has a rectangular first positioning hole, and the inner mold has a corresponding second positioning hole. When the outer mold and the inner mold are assembled, the first positioning hole and the second positioning hole are aligned, and positioning pins are built into the first positioning hole and the second positioning hole.

[0013] Preferably, a ring of mating protrusions is formed at the edge of the outer mold by cutting, and a corresponding mating ring is provided on the opposite side of the inner mold and the outer mold. Clamping planes are symmetrically cut on the outer sides of both the outer mold and the inner mold.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The trapezoidal and circular reinforcing blocks on the outer side of the working belt in this utility model are precisely targeted at areas where the extrusion pressure is concentrated, such as the length direction and the bending point. They can specifically enhance the strength of the working belt, prevent its deformation, extend the service life of the mold, and ensure the long-term accuracy of the mold. Furthermore, the outer mold through hole is connected to the flow bridge, which can assist in cooling and reduce defects such as bubbles and cracks inside the profile.

[0015] (2) In this utility model, the width of the back empty knife of the working belt is greater than that of the working belt, which can reduce the extrusion resistance, make the metal flow more uniform, improve the dimensional accuracy of the profile, and the design of the upper and lower empty knives can not only avoid stress concentration of the mold core and prevent breakage, but also reduce the friction between the profile and the mold core, and help to demold smoothly.

[0016] (3) The combination of the first / second positioning hole + positioning post, the docking protrusion + docking ring in this utility model can realize the precise assembly of the outer mold and the inner mold and reduce the assembly error; the symmetrical clamping plane on the outside facilitates the installation and fixation of the mold and improves the operating efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the aluminum profile extrusion die in this utility model.

[0018] Figure 2 This is a split view of the aluminum profile extrusion die in this utility model.

[0019] Figure 3 This utility model relates to a dense inner and outer mold structure. Figure 1 .

[0020] Figure 4 This utility model relates to a dense inner and outer mold structure. Figure 2 .

[0021] Figure 5 This utility model relates to a dense inner mold structure. Figure 1 .

[0022] Figure 6 This utility model relates to a dense inner mold structure. Figure 2 .

[0023] The correspondence between the labels and component names in the attached figures is as follows: 1. Outer mold; 11. Diverter hole; 12. Diverter bridge; 13. Mold core; 131. Upper open cutter; 132. Lower open cutter; 14. First positioning hole; 15. Butt joint protrusion; 2. Inner mold; 21. Mold hole; 211. Working belt; 212. Reinforcing block; 22. Welding chamber; 221. Rear open cutter; 23. Butt joint ring; 24. Second positioning hole; 3. Clamping plane. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. The present invention provides the following embodiments.

[0027] See Figure 1 This aluminum profile extrusion die achieves efficient forming of hollow aluminum profiles through the precise assembly of outer die 1 and inner die 2. Each structural design is tailored to the core requirements of the extrusion process, ensuring forming accuracy and die stability.

[0028] See Figure 2-4 In this embodiment, the outer mold 1 serves as the core component for metal flow distribution. Its central cavity is divided into several flow distribution holes 11 by a flow distribution bridge 12. After the aluminum rod enters the cavity under the action of the extruder, it is uniformly distributed through the flow distribution holes 11. The flow distribution bridge 12 adopts a hollow structure design, which, together with the symmetrically opened through holes on the side wall of the outer mold 1, forms an efficient heat dissipation channel, promptly dissipating the heat accumulated during the extrusion process and preventing the mold from cracking due to thermal fatigue. Simultaneously, the hollow structure can reduce the overall weight of the mold while ensuring the strength of the flow distribution bridge 12, facilitating assembly and maintenance. (See figures and...) Figure 4 In this embodiment, the mold core 13, which is centrally located on the inner side of the outer mold 1, is the key to shaping the inner hole of the profile. The chamfer design at its corners can reduce the resistance to metal flow and avoid stress concentration causing scratches on the inner wall of the profile. The upper cutter 131 in the discharge direction and the lower cutter 132 in the feed direction of the mold core 13 form a two-way avoidance structure. The upper cutter 131 can prevent excessive friction between the profile and the mold core 13 when the profile is discharged, ensuring the smoothness of the profile surface. The lower cutter 132 provides a buffer space for the metal flow at the feed end, further optimizing the metal flow velocity distribution, reducing the impact force on the mold core 13, and extending its service life.

[0029] See Figure 5 and Figure 6In this embodiment, the welding chamber 22 on the side where the inner mold 2 and the outer mold 1 are in contact is a key area for the re-fusion of the metal after diversion. The diverted metal is re-welded into a whole within the welding chamber 22 under high temperature and high pressure, laying the foundation for subsequent forming. The mold hole 21 on the other side of the inner mold 2 is connected to the welding chamber 22 through the working belt 211. The working belt 211 directly determines the final cross-sectional dimensions and accuracy of the profile. The two types of reinforcing blocks 212 set on its outer side specifically address the strength problem of the working belt 211—the trapezoidal reinforcing blocks 212 are arranged along the length of the working belt 211, which can provide uniform support for the long straight section of the working belt 211 and prevent it from collapsing under continuous extrusion pressure. For bending deformation, circular reinforcing blocks 212 are set at the bends of the working strip 211. Utilizing the stress concentration resistance characteristics of the circular structure, the load-bearing capacity of the bend is enhanced, preventing cracking or deformation of the working strip 211 due to excessive local pressure, and ensuring the stability of the profile cross-sectional shape. Furthermore, the rear cutter 221 at the rear end of the working strip 211 abuts against and connects with the welding chamber 22, and the width of the rear cutter 221 is greater than the width of the working strip 211. This design can reduce stress abrupt changes at the connection between the welding chamber 22 and the working strip 211, while providing transition space for metal before it enters the working strip 211, making the metal flow more stable and avoiding uneven profile wall thickness caused by sudden changes in flow velocity. In the assembly structure of the outer mold 1 and the inner mold 2, the first positioning hole 14 of the outer mold 1 and the corresponding second positioning hole 24 of the inner mold 2 are used in conjunction with the positioning pin to achieve precise alignment of the upper and lower parts of the mold and avoid the disorder of metal flow caused by assembly misalignment. The mating protrusion 15 on the edge of the outer mold 1 and the mating ring 23 of the inner mold 2 form a nested structure, which further improves the assembly sealing and prevents metal from overflowing from the mold gap during extrusion. The clamping plane 3 symmetrically cut on the outer side of the outer mold 1 and the inner mold 2 makes it easy to fix the mold with tooling fixtures during installation, ensuring that the mold remains stable in the extruder and avoiding the impact of mold shaking on the profile forming accuracy.

[0030] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. An extrusion die for aluminium profiles comprising an outer die (1) and an inner die (2), said outer die (1) and inner die (2) being assembled to form the extrusion die, characterised in that: The outer mold (1) has a cavity in the center, and a flow divider bridge (12) is provided in the cavity. The flow divider bridge (12) is a hollow structure. The cavity forms a flow divider hole (11) through the flow divider bridge (12). The flow divider bridge (12) has a mold core (13) in the center on the inner side. The inner mold (2) has a welding chamber (22) in the center on the side that is in contact with the outer mold (1). The other side of the inner mold (2) has a mold hole (21). The mold hole (21) communicates with the welding chamber (22). A working strip (211) is provided between the two. Multiple reinforcing blocks (212) are provided on the outer side of the working strip (211).

2. The aluminum profile extrusion die according to claim 1, characterized in that: The outer mold (1) has multiple through holes on its side wall, and the through holes are symmetrically arranged on the outside of the outer mold (1). The through holes are connected to the inside of the diversion bridge (12).

3. The aluminum profile extrusion die according to claim 2, characterized in that: The mold core (13) has chamfers at all corners, and an upper cutter (131) is provided on the mold core (13). The upper cutter (131) is located in the discharge direction of the mold core (13). The mold core (13) is also provided with a lower cutter (132), which is located in the feed direction of the mold core (13).

4. The aluminum profile extrusion die of claim 1, wherein: The working belt (211) has a rear hollow knife (221) at its rear end. The rear hollow knife (221) is in contact with the welding chamber (22), and the width of the rear hollow knife (221) is greater than the width of the working belt (211).

5. The aluminum profile extrusion die according to claim 1, characterized in that: There are two types of reinforcing blocks (212): trapezoidal structure and circular structure. The trapezoidal reinforcing block (212) is set in the length direction of the working belt (211), and the circular reinforcing block (212) is set at the bend of the working belt (211).

6. The aluminum profile extrusion die according to claim 5, characterized in that: The outer mold (1) has a rectangular first positioning hole (14), and the inner mold (2) has a corresponding second positioning hole (24). When the outer mold (1) and the inner mold (2) are assembled, the first positioning hole (14) and the second positioning hole (24) are aligned, and positioning pins are built into the first positioning hole (14) and the second positioning hole (24).

7. The aluminum profile extrusion die of claim 1, wherein: The outer mold (1) has a ring of mating protrusions (15) formed by cutting at the edge, and the inner mold (2) has a corresponding mating ring (23) on the side opposite to the outer mold (1). The outer mold (1) and the inner mold (2) are both symmetrically cut with clamping planes (3).

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