Aluminum profile hot extrusion die for automobile luggage rack

Abstract

The utility model discloses an aluminum profile hot extrusion die for an automobile baggage holder, which comprises an upper die, a shunting bridge is arranged in the upper die, four shunting holes are separated in the upper die by the shunting bridge, and a chamfering surface is arranged at the position of the shunting bridge at the top opening of each shunting hole. According to the utility model, the chamfered surfaces are arranged, so that molten aluminum flowing into the flow dividing holes can smoothly flow into the flow dividing holes and can be effectively guided and smoothly transited to the lower clearance tool by the straight-milled flow dividing holes, the fusion of the molten aluminum is facilitated, and the molten aluminum is prevented from falling off under the combined action of the first-stage welding chamber and the second welding chamber. And through the arrangement of the check blocks, molten aluminum can quickly flow into the cavity, so that the whole flowing process of the molten aluminum is always balanced and stable, the fusion effect is good, the problems of light sensation, white lines and the like on the surface of the aluminum profile of the automobile luggage rack are effectively avoided, and the production quality of the aluminum profile of the automobile luggage rack is guaranteed.

Description

Technical Field

[0001] This utility model specifically relates to a hot extrusion die for aluminum profiles of automobile luggage racks. Background Technology

[0002] A car roof rack is a bracket installed on the roof of a vehicle, mainly used to expand the vehicle's cargo space and facilitate the transport of large items such as bicycles, suitcases, or camping equipment. In addition to this basic cargo carrying function, a high-quality roof rack can also enhance the vehicle's appearance, making the vehicle look more sporty and stylish. It is a relatively practical car accessory, especially suitable for car owners who frequently take long-distance trips or engage in outdoor activities. Currently, most car roof racks are produced by hot extrusion molds by extruding molten aluminum.

[0003] However, when using existing hot extrusion dies to produce luggage racks, the flow rate of molten aluminum into the cavity is unstable, and the molten aluminum is difficult to fuse together. This results in a glossy surface or white lines on the surface of the luggage rack during molding, leading to substandard profiles and a high scrap rate.

[0004] Therefore, it is necessary to invent a hot extrusion die for aluminum profiles of automobile roof racks to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a hot extrusion die for aluminum profiles of car roof racks. By setting a chamfered surface, the molten aluminum flowing into the diversion hole can flow smoothly into the diversion hole and be effectively guided by the straight milling diversion hole, smoothly transitioning to the lower blank cutter, which is conducive to the fusion of the molten aluminum. Under the combined action of the primary welding chamber and the secondary welding chamber, the welding quality of the molten aluminum is also greatly improved. The setting of the baffle allows the molten aluminum to flow into the cavity quickly, so that the entire flow process of the molten aluminum is always balanced and stable, with good fusion effect, effectively avoiding problems such as glossiness and white lines on the surface of the aluminum profile of car roof racks, and ensuring the production quality of the aluminum profile of car roof racks.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a hot extrusion die for aluminum profiles of automobile roof racks, including an upper die, wherein a flow divider bridge is provided inside the upper die, and the upper die is divided into four flow divider holes by the flow divider bridge, wherein the flow divider bridge position at the top opening of each flow divider hole is provided with a chamfered surface;

[0009] The lower empty blade is connected to the bottom center of the flow divider bridge. The bottom of the lower empty blade is connected to a working belt, and the bottom of the working belt is connected to an upper empty blade.

[0010] The lower mold has a welding chamber at its top. The welding chamber includes a primary welding chamber located above and a secondary welding chamber located below. A stop block is provided inside the secondary welding chamber.

[0011] The cavity is located inside the lower die and is connected to the secondary welding chamber to allow the working strip to be inserted to form a forming gap for the hot extrusion production of aluminum profiles for automotive roof racks.

[0012] Preferably, the four diversion holes are located above the four corners of the cavity, and each diversion hole is milled straight to the bottom outlet, which is flush with the top of the lower cutter.

[0013] Preferably, the fillet radius of each chamfered surface is set to degrees and the width is 4mm.

[0014] Preferably, the number of the stops is not less than two, and each stop is respectively arranged on a different side wall of the secondary welding chamber.

[0015] Preferably, the thickness of each of the stops is set to 3 mm.

[0016] Preferably, the bottom of the lower mold has a discharge hole that communicates with the cavity, and the discharge hole is stepped.

[0017] Preferably, both the upper and lower molds are made of H13 mold steel and are tightly fitted together to form a mold body by fasteners.

[0018] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0019] This invention, by incorporating a chamfered surface, reduces the impact of molten aluminum flowing into the diversion hole on the diversion bridge and effectively guides it through the milled diversion hole, smoothly transitioning to the lower cutter and further flowing into the welding chamber. Throughout the process, the molten aluminum flow rate is stable, ensuring smooth flow throughout the working zone and allowing for direct impact on all four sides of the cavity, guaranteeing sufficient aluminum supply and facilitating fusion between the molten aluminum components. Under the combined action of the primary and secondary welding chambers, the welding quality is significantly improved, further enhancing the fusion effect between the molten aluminum components. The baffle inside the secondary welding chamber prevents the molten aluminum from accumulating inside, allowing it to flow quickly into the cavity and avoiding turbulence at the cavity entrance. This ensures a consistently stable and balanced flow of molten aluminum, preventing issues such as glossiness and white lines on the surface of the aluminum profile for automotive roof racks formed within the cavity, thus guaranteeing the production quality of the aluminum profile for automotive roof racks. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is an exploded view of the present invention;

[0023] Figure 3 This is a schematic diagram of the upper mold structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the lower mold structure of this utility model;

[0025] Figure 5 This is a half-sectional view of the present invention;

[0026] Figure 6 This is a schematic diagram of the upper mold structure from another perspective of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1 Upper mold, 2 Diverter bridge, 3 Diverter hole, 4 Chamfered surface, 5 Lower empty cutter, 6 Working zone, 7 Upper empty cutter, 8 Lower mold, 9 Welding chamber, 91 Primary welding chamber, 92 Secondary welding chamber, 10 Stop block, 11 Cavity, 12 Discharge hole. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0030] This utility model provides, for example Figure 1-6 The above describes a hot extrusion die for aluminum profiles of car roof racks, including an upper die 1. The upper die 1 is provided with a flow divider bridge 2 inside. The upper die 1 is divided into four flow divider holes 3 by the flow divider bridge 2. Each flow divider hole 3 has a chamfered surface 4 at the top opening of the flow divider bridge 2.

[0031] The lower empty blade 5 is connected to the bottom center of the diversion bridge 2. The bottom of the lower empty blade 5 is connected to the working belt 6, and the bottom of the working belt 6 is connected to the upper empty blade 7.

[0032] The lower mold 8 has a welding chamber 9 at its top. The welding chamber 9 includes a primary welding chamber 91 located above and a secondary welding chamber 92 located below. A stop block 10 is provided inside the secondary welding chamber 92.

[0033] Cavity 11 is formed inside the lower mold 8 and is connected to the secondary welding chamber 92 to allow the working strip 6 to be inserted to form a forming gap for hot extrusion production of aluminum profiles for automobile luggage racks.

[0034] In one embodiment, the four diversion holes 3 are located above the four corners of the cavity 11, so that the molten aluminum flowing out through the diversion holes 3 can directly hit the four corners of the cavity 11, thereby ensuring sufficient material supply at all parts of the cavity 11, ensuring the fusion effect of the molten aluminum, and avoiding flow velocity differences in the molten aluminum within the cavity. Each diversion hole 3 is milled straight to the bottom outlet, flush with the top of the lower cutter 5, so that the molten aluminum can smoothly transition to the outside of the lower cutter 5, and then flow stably towards the outside of the working belt 6, ensuring that high-quality automotive roof rack aluminum profiles can be formed within the cavity 11.

[0035] In one embodiment, the fillet radius of each chamfered surface 4 is set to 15 degrees and the width is 4 mm, so that the molten aluminum can flow smoothly into the diversion hole 3 and effectively reduce the impact of the molten aluminum on the diversion bridge, thereby improving the service life of the mold body.

[0036] In one embodiment, there are no fewer than two baffles 10, each baffle 10 is respectively disposed on a different side wall of the secondary welding chamber 92, and the thickness of each baffle 10 is set to 3mm. The aluminum liquid inside the secondary welding chamber 92 is guided again so that it can flow quickly into the cavity 11, avoiding the accumulation of aluminum liquid, ensuring the stability of the aluminum liquid flow, and further improving the production quality of the aluminum profile for the car roof rack.

[0037] In one embodiment, the bottom of the lower die 8 is provided with a discharge hole 12 that communicates with the cavity 11. The discharge hole 12 is stepped to ensure that the surface of the formed aluminum profile of the car roof rack is not affected during extrusion, thus ensuring the quality of the finished product. Both the upper die 1 and the lower die 8 are made of H13 mold steel and are fastened together to form a mold body by fasteners. Specifically, the fasteners are set as pins or bolts to facilitate the assembly of the mold body by the workers. The mold body is disc-shaped to facilitate the use of the mold body by the workers.

[0038] The specific implementation method is as follows: When this utility model is used, the aluminum liquid is divided into four streams and flows downward under the limitation of the flow bridge 2 of the upper mold 1. At this time, the chamfered surface 4 at the top of the flow hole 3 can effectively guide the aluminum liquid, so that it flows smoothly downward along the inner wall of the straight milled flow hole 3, and directly impacts the four corners of the cavity 11, ensuring sufficient material supply in all parts of the cavity 11, and reducing the impact of the aluminum liquid on the flow bridge 2. This ensures that the aluminum liquid has a stable flow rate inside the flow hole 3, and can flow steadily and evenly into the cavity 11. The aluminum liquid has good fusion and a stable and even flow rate, so that the aluminum profile of the car luggage rack extruded by the aluminum liquid in the forming gap has a good surface finish and no problems such as gloss or white lines.

[0039] Meanwhile, when the aluminum flows through the lower cutter 5, the inner wall of the diversion hole 3 is milled directly to the lower cutter 5, which provides a good flow path for the aluminum liquid. This allows the aluminum liquid to flow smoothly through the lower cutter 5, with a smooth transition and good fusion between the aluminum liquids. It can flow steadily to the working zone 6, which again avoids the aluminum liquid from flowing unstably, thus preventing surface quality problems such as glossiness and white lines from appearing on the aluminum profile of the car roof rack during the forming process.

[0040] Furthermore, the design of the primary welding chamber 91 and the secondary welding chamber 92 before the aluminum flow reaches the cavity 11 improves the welding quality of the aluminum flow in the welding chamber 9, allowing for better fusion. The baffle 10 not only increases the strength of the lower mold 8 and prevents the cavity 11 of the lower mold 8 from collapsing, but also guides the aluminum liquid in the secondary welding chamber 92, preventing the aluminum liquid from accumulating inside the welding chamber 9 and allowing it to flow quickly to the cavity 11. This prevents turbulence at the entrance of the cavity 11, making the aluminum liquid flow smoother and further ensuring the stability of the aluminum liquid flow. This prevents problems such as glossiness and white lines from appearing on the surface of the aluminum profile of the car roof rack formed in the cavity 11.

[0041] This embodiment specifically solves the problem in the prior art where, when the molten aluminum flows into the cavity 11 of the existing hot extrusion mold during the production of luggage racks, the flow rate is unstable and the molten aluminum is difficult to fuse, resulting in a glossy surface or white lines on the surface of the luggage rack during molding, leading to unqualified profiles and a high scrap rate.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hot extrusion die for aluminum profiles used in automotive roof racks, characterized in that: include: The upper mold (1) is provided with a flow divider bridge (2) inside the upper mold (1). The upper mold (1) is divided into four flow divider holes (3) by the flow divider bridge (2). Each flow divider hole (3) has a chamfered surface (4) at the top opening of the flow divider bridge (2). The lower empty blade (5) is connected to the bottom center of the diversion bridge (2), and the bottom of the lower empty blade (5) is connected to the working belt (6), and the bottom of the working belt (6) is connected to the upper empty blade (7). The lower mold (8) has a welding chamber (9) at its top. The welding chamber (9) includes a primary welding chamber (91) located above and a secondary welding chamber (92) located below. A stop block (10) is provided inside the secondary welding chamber (92). The cavity (11) is opened inside the lower mold (8) and is connected to the secondary welding chamber (92) so that the working strip (6) can be inserted to form a forming gap for hot extrusion production of aluminum profiles for automobile luggage racks.

2. The hot extrusion die for aluminum profiles of automobile roof racks according to claim 1, characterized in that: The four diversion holes (3) are located above the four corners of the cavity (11), and each diversion hole (3) is milled straight to the bottom outlet and is flush with the top of the lower cutter (5).

3. The hot extrusion die for aluminum profiles of automobile roof racks according to claim 1, characterized in that: The fillet of each chamfered surface (4) is set to 15 degrees and the width is 4 mm.

4. The hot extrusion die for aluminum profiles of automobile roof racks according to claim 1, characterized in that: The number of the baffles (10) is not less than two, and each baffle (10) is respectively set on a different side wall of the secondary welding chamber (92).

5. The hot extrusion die for aluminum profiles of automobile roof racks according to claim 4, characterized in that: The thickness of each of the aforementioned blocks (10) is set to 3 mm.

6. The hot extrusion die for aluminum profiles of automobile roof racks according to claim 1, characterized in that: The bottom of the lower mold (8) is provided with a discharge hole (12) that communicates with the cavity (11), and the discharge hole (12) is set in a stepped shape.

7. The hot extrusion die for aluminum profiles of automobile roof racks according to claim 1, characterized in that: The upper mold (1) and the lower mold (8) are both made of H13 mold steel and are fastened together to form a mold body.

Images