Extrusion barrel, extrusion device and extrusion method for producing wide thin-walled aluminum profiles

Abstract

The application provides an extrusion cylinder for preparing wide-thin-wall aluminum profile, an extrusion device and an extrusion method, and relates to the technical field of aluminum profile preparation and production. The extrusion cylinder comprises an extrusion cylinder body, a first inner cavity and a second inner cavity are arranged in the extrusion cylinder body, the first inner cavity is communicated with the second inner cavity, the outlet end of the first inner cavity and the inlet end of the second inner cavity are smoothly connected, the width of the outlet end of the second inner cavity is greater than the diameter of the first inner cavity, and the height of the outlet end of the second inner cavity is less than the diameter of the first inner cavity. The extrusion device comprises an extrusion rod, an extrusion die and the above-mentioned extrusion cylinder for preparing wide-thin-wall aluminum profile, and the outlet end of the second inner cavity is communicated with the extrusion die. The extrusion cylinder for preparing wide-thin-wall aluminum profile solves the problem that the traditional round ingot is difficult to extrude wide-thin-wall aluminum profile. When the same wide-thin-wall aluminum profile is produced, the required equipment tonnage is greatly reduced, the production difficulty is greatly reduced, and the equipment investment and production cost are saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aluminum profile preparation and production, in particular to an extrusion cylinder, an extrusion device and an extrusion method for preparing wide and thin aluminum profile. BACKGROUND

[0002] Wide and thin aluminum profile refers to aluminum profile with large total width and thin wall thickness, which is widely used in new energy automobile battery lower shell bottom plate / water cooling plate, truck compartment wall plate, high-speed train and subway compartment plate, energy storage water cooling integrated plate, ship floor and the like. In the case of larger width and thinner wall thickness, the production can reduce the number of spliced welds and the total weight, thereby greatly reducing the production cost and meeting the strong market demand.

[0003] At present, most of the aluminum profile extrusion is carried out by using round ingot. During production, the round ingot is placed in an extrusion cylinder with a straight-through circular inner cavity, the inner diameter of which is 5-10mm larger than the diameter of the ingot. The ingot is pushed by an extrusion rod to flow into a die with a closely matched other end of the extrusion cylinder, a pre-designed cavity and a work belt size, and is forced to flow out of the die hole to produce aluminum profiles of various sections. The width-thickness ratio (i.e. the ratio B / t of the width B to the wall thickness t) of the extruded profile is an important indicator of wide and thin wall, and is also the main indicator reflecting the processing difficulty of the profile. The larger the width-thickness ratio of the profile, the more difficult the forming.

[0004] The traditional round ingot extrusion method can generally only produce profiles with a width smaller than the diameter of the round ingot. In order to produce larger width aluminum profiles, larger extrusion machines need to be used. However, the cost of large-scale extrusion production line is high, which increases the production cost. At the same time, the extrusion of aluminum profiles is also limited by the extrusion ratio (extrusion ratio = extrusion cylinder inner diameter area ÷ profile cross-sectional area). An excessively large extrusion ratio will exceed the capacity of the equipment, resulting in failure to extrude or damage to the equipment, and it is difficult to produce wide and thin aluminum profiles. SUMMARY

[0005] Therefore, in order to solve the problem of difficulty in producing wide and thin aluminum profiles, one of the purposes of the present application is to provide an extrusion cylinder for preparing wide and thin aluminum profile, and the specific technical scheme is as follows:

[0006] An extrusion cylinder for preparing wide and thin aluminum profile, comprising an extrusion cylinder body, a first inner cavity and a second inner cavity are arranged in the extrusion cylinder body, the first inner cavity and the second inner cavity are communicated, the outlet end of the first inner cavity and the inlet end of the second inner cavity are smoothly transitioned, the outlet end of the second inner cavity is communicated with the extrusion die, the width of the outlet end of the second inner cavity is greater than the diameter of the first inner cavity, and the height of the outlet end of the second inner cavity is less than the diameter of the first inner cavity.

[0007] Further, the outlet end of the first inner cavity is matched with the inlet end of the second inner cavity in shape and size, and the outlet end of the second inner cavity is set as a rectangle.

[0008] Further, the cross-sectional area of the outlet end of the second inner cavity is smaller than that of the inlet end of the second inner cavity.

[0009] Further, the width-height ratio of the outlet end of the second inner cavity is set in the range of 1.5-10.

[0010] Further, the center lines of the first inner cavity and the second inner cavity in the horizontal direction are located at the same position.

[0011] Further, the extrusion cylinder body comprises a first cylinder body, the first inner cavity and the second inner cavity are arranged in the first cylinder body, and the first inner cavity and the second inner cavity are integrally formed with the first cylinder body.

[0012] Further, the extrusion cylinder body comprises a second cylinder body and a third cylinder body, the second cylinder body and the third cylinder body are detachably connected, the first inner cavity is arranged in the second cylinder body, and the second inner cavity is arranged in the third cylinder body.

[0013] Another object of the present application is to provide an extrusion device for preparing wide-thin-wall aluminum profiles.

[0014] An extrusion device for preparing wide-thin-wall aluminum profiles, comprising an extrusion rod, an extrusion die and the above-mentioned extrusion cylinder for preparing wide-thin-wall aluminum profiles, the outlet end of the second inner cavity is communicated with the extrusion die, and the extrusion rod can enter the first inner cavity.

[0015] Further, the extrusion die comprises an upper die and a lower die, the upper die is provided with a plurality of axial through flow holes, the lower die is sequentially provided with a die cavity, a lower die working belt and a profile outlet from top to bottom, the die cavity, the lower die working belt and the profile outlet are communicated with each other, each flow hole is communicated with the die cavity, and the outlet end of the second inner cavity is communicated with each flow hole.

[0016] Another object of the present application is to provide an extrusion method for preparing wide-thin-wall aluminum profiles.

[0017] The application discloses an extrusion method for preparing wide thin-wall aluminum profiles, and is applied to the extrusion device for preparing wide thin-wall aluminum profiles.

[0018] Compared with the prior art, the extrusion cylinder for preparing wide thin-wall aluminum profiles has the following beneficial effects: the first inner cavity and the second inner cavity are arranged in the extrusion cylinder body, the width of the outlet end of the second inner cavity is larger than the diameter of the first inner cavity, the height of the outlet end of the second inner cavity is smaller than the diameter of the first inner cavity, the shape of metal flow can be effectively changed, the height of the round ingot is continuously reduced under the condition that the metal volume is unchanged, the metal on both sides is expanded to left and right, the width is continuously increased, the round ingot is gradually changed into a flat rectangular ingot with a certain width-height ratio at the outlet, and the profile itself is closer to the outline, the wide profile whose diameter is much larger than that of the round ingot can be extruded when the round ingot is extruded, the wide profile can be produced by a small and medium-sized extruder, the equipment cost and the production cost are greatly reduced, meanwhile, the extrusion ratio is effectively reduced when the smaller diameter round ingot is used to produce the wide profile, so that the profile with a thinner wall thickness can be produced, the extrusion cylinder for preparing wide thin-wall aluminum profiles solves the problem that the traditional round ingot is difficult to extrude the wide thin-wall aluminum profile, the tonnage of the required equipment is greatly reduced when the same wide thin-wall aluminum profile is produced, the production difficulty is greatly reduced, and the equipment investment and the production cost are saved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The application can be further understood from the following description in conjunction with the accompanying drawings, in which the components in the drawings are not necessarily drawn to scale, but emphasis is instead placed on illustrating the principles of the embodiments, and the same reference numerals designate corresponding parts in different views.

[0020] Figure 1 is a front view of the extrusion cylinder for preparing wide thin-wall aluminum profiles according to an embodiment of the application;

[0021] Figure 2 is a side view of the extrusion cylinder for preparing wide thin-wall aluminum profiles according to an embodiment of the application;

[0022] Figure 3 is a top view of the extrusion cylinder for preparing wide thin-wall aluminum profiles according to an embodiment of the application;

[0023] Figure 4is a top view of an extrusion cylinder for manufacturing wide thin-walled aluminum profile according to an embodiment of the present application;

[0024] Figure 5 is a structural schematic diagram of an extrusion device for manufacturing wide thin-walled aluminum profile according to an embodiment of the present application;

[0025] Figure 6 is a sectional view of an extrusion die for manufacturing wide thin-walled aluminum profile according to an embodiment of the present application;

[0026] Figure 7 is a structural schematic diagram of an extrusion cylinder for manufacturing wide thin-walled aluminum profile according to another embodiment of the present application;

[0027] Figure 8 is a structural schematic diagram of an extrusion device for manufacturing wide thin-walled aluminum profile according to another embodiment of the present application;

[0028] Figure 9 is a flow chart of an extrusion method for manufacturing wide thin-walled aluminum profile according to another embodiment of the present application.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, extrusion cylinder body; 11, first inner cavity; 12, second inner cavity; 13, first cylinder body; 14, second cylinder body; 15, third cylinder body; 2, extrusion die; 21, upper die; 211, shunt hole; 22, lower die; 221, die cavity; 222, lower die working belt; 223, profile outlet. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear and understandable, the present application will be further described in detail below in combination with its embodiments, and it should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the protection scope of the present application.

[0032] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] In this invention, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0035] Example 1

[0036] like Figures 1-4 As shown, an extrusion cylinder for preparing wide-width thin-walled aluminum profiles according to one embodiment of the present invention includes an extrusion cylinder body 1. The extrusion cylinder body 1 has a first inner cavity 11 and a second inner cavity 12. The first inner cavity 11 and the second inner cavity 12 are connected. The width of the outlet end of the second inner cavity 12 is greater than the diameter of the first inner cavity 11, and the height of the outlet end of the second inner cavity 12 is less than the diameter of the first inner cavity 11. This effectively changes the shape of the metal flow. There is a smooth transition between the outlet end of the first inner cavity 11 and the inlet end of the second inner cavity 12. With a constant metal volume, the height of the round ingot continuously decreases, and the metal on both sides expands to the left and right. As the width increases, it gradually transforms into a flat rectangular ingot with a certain aspect ratio at the exit, more closely resembling the outline of the wide profile itself. When using round ingots for extrusion, it can extrude wide profiles that are much larger than the diameter of the round ingot. Small and medium-sized extrusion presses can produce wide profiles, greatly reducing equipment and production costs. At the same time, using smaller diameter round ingots to produce wide profiles can effectively reduce the extrusion ratio, thereby producing profiles with thinner walls, allowing the metal to fill the die cavity 221 more evenly, thus producing wide, thin-walled aluminum profiles with a width much larger than the diameter of the round ingot, resulting in more precise shapes and better surface quality.

[0037] As a preferred embodiment of the present invention, it may also have the following additional technical features: the outlet end of the first inner cavity 11 matches the shape and size of the inlet end of the second inner cavity 12, and the outlet end of the second inner cavity 12 is set as a rectangle. In this embodiment, the outlet end of the second inner cavity 12 is set as a flat rectangle with two rounded or rounded corners. During the extrusion process, stress concentration can be reduced, cracking risk can be reduced, and the stability and yield of the extrusion process can be improved. At the same time, the rounded corner rectangle can also reduce friction and resistance, which is beneficial to the uniformity of metal flow, thereby improving product quality and performance. Of course, in other embodiments, the shape of the outlet end of the second inner cavity 12 can be designed differently according to different needs.

[0038] As a preferred embodiment of the present invention, it may also have the following additional technical features: the cross-sectional area of ​​the outlet end of the second inner cavity 12 is smaller than the cross-sectional area of ​​the inlet end of the second inner cavity 12, and the width-to-height ratio of the outlet end of the second inner cavity 12 is set to a range of 1.5-10. By adjusting the width-to-height ratio of the outlet end of the second inner cavity 12, the characteristics of metal flow during extrusion can be precisely controlled, thereby producing profiles with different width requirements. The change in the width-to-height ratio can affect the rate and direction of metal flow, thereby affecting parameters such as the wall thickness and width of the profile. Setting the width-to-height ratio of the outlet end of the second inner cavity 12 to a range of 1.5-10 can effectively improve extrusion efficiency, optimize the flow and stress distribution of metal materials, thereby reducing extrusion defects and improving the quality and strength of the profile. Specifically, in this embodiment, the width dimension of the outlet end of the second inner cavity 12 is slightly larger than the width of the corresponding aluminum material, and the height dimension of the outlet end of the second inner cavity 12 is slightly larger than the height of the corresponding aluminum material.

[0039] As a preferred embodiment of the present invention, it may also have the following additional technical features: the center lines of the first inner cavity 11 and the second inner cavity 12 are located at the same position in the horizontal direction. When the center lines of the two inner cavities are located at the same position, the structure of the entire extrusion cylinder will be more symmetrical. This symmetry helps to reduce possible offset or twisting during the extrusion process, thereby improving the stability of the extrusion process and the reliability of the material quality. By aligning the first inner cavity 11 and the second inner cavity 12 in the horizontal direction, the flow path and direction of the metal during the extrusion process can be better controlled. This alignment helps to ensure that the metal maintains consistent flow characteristics during the flow process, thereby reducing possible uneven flow or uncontrolled metal flow.

[0040] As a preferred embodiment of the present invention, it may also have the following additional technical features: the extrusion cylinder body 1 includes a first cylinder 13, a first inner cavity 11 and a second inner cavity 12 disposed within the first cylinder 13, the first inner cavity 11 and the second inner cavity 12 being integrally formed with the first cylinder 13, which can increase the overall structural strength and stability of the extrusion cylinder. This design method reduces the connection and gaps between components, reducing the risk of structural deformation or damage that may occur during high temperature and high pressure extrusion. At the same time, by precisely controlling the shape and size of the first inner cavity 11 and the second inner cavity 12, the flow of metal during the extrusion process can be better guided. The integrally formed design ensures the continuity and consistency of the inner cavity, thereby optimizing the flow characteristics of the metal and helping to improve the quality and performance of the extruded profile.

[0041] Please refer to the following: Figures 5-6This embodiment also provides an extrusion apparatus for preparing wide-width thin-walled aluminum profiles, including an extrusion rod, an extrusion die 2, and the aforementioned extrusion cylinder for preparing wide-width thin-walled aluminum profiles. The outlet end of the second inner cavity 12 is connected to the extrusion die 2, and the extrusion rod can enter the first inner cavity 11. In this embodiment, the extrusion die 2 includes an upper die 21 and a lower die 22. The upper die 21 has multiple axially penetrating diversion holes 211. The lower die 22 has a die cavity 221, a lower die working belt 222, and a profile outlet 223 arranged sequentially from top to bottom. The two inner cavities 2 and 223 are interconnected, and each diversion hole 211 is connected to the mold cavity 221. The outlet end of the second inner cavity 12 is connected to each diversion hole 211. The design of the diversion hole 211 allows the metal to flow into the mold cavity 221 more evenly during the extrusion process. Through multiple diversion holes 211, the metal is dispersed and transported into the mold cavity 221. Under the action of pressure and high temperature, the round ingot is fused in the mold cavity 221 and forced to flow out from the gap formed by the upper mold 21 and the lower mold working zone 222, thereby producing wide thin-walled profiles of specific shapes and sizes.

[0042] As a preferred embodiment of the present invention, it may also have the following additional technical features: the cross-sectional area of ​​the end of each diversion hole 211 near the second inner cavity 12 is smaller than the cross-sectional area of ​​the end of each diversion hole 211 near the lower die 22. The smaller cross-sectional area of ​​the end of the diversion hole 211 near the second inner cavity 12 can limit the flow velocity of metal in this area. By reducing the cross-sectional area, the resistance to metal flow is increased, thereby slowing down the flow velocity of metal. The larger cross-sectional area of ​​the end of each diversion hole 211 near the lower die 22 is beneficial to metal welding. By increasing the area of ​​the diversion hole 211, the number of diversion holes 211 is reduced, thereby reducing the number of weld seams and reducing the extrusion pressure.

[0043] Please refer to the following: Figure 9 This embodiment also provides an extrusion method for preparing wide, thin-walled aluminum profiles, applied to the above-mentioned extrusion apparatus for preparing wide, thin-walled aluminum profiles, comprising the following steps:

[0044] S1. Heat the extrusion cylinder and ensure uniform temperature. The extrusion cylinder temperature is 390℃-410℃.

[0045] S2. Prepare round ingots and place them in an induction furnace for heating at a temperature of 460℃-500℃.

[0046] S3. Preheat the extrusion die 2 and keep it at 440℃-460℃ in the die heating furnace for 5-8 hours;

[0047] S4. Install the extrusion die 2 on the extrusion die holder and fit it tightly against the extrusion cylinder outlet end without leaving any gaps to prevent aluminum from flowing out of the gaps.

[0048] S5. Place the round ingot into the extrusion cylinder body 1 and push it in from the inlet end of the extrusion cylinder body 1. Under the action of the extrusion rod, it moves forward at a set speed and passes through the first inner cavity 11 and the second inner cavity 12 in sequence. With the metal volume remaining unchanged, the height of the round ingot continuously decreases, the metal on both sides expands to the left and right, and the width continuously increases. At the outlet, it gradually becomes a flat rectangular ingot with a certain width-to-height ratio. Finally, it is formed from the extrusion die 2 to produce a wide thin-walled aluminum profile.

[0049] Specifically, in this embodiment, before heating the round ingot in step S2, the surface of the round ingot needs to be machined to remove surface stains and impurities, thereby reducing the impact on product quality.

[0050] The extrusion cylinder for preparing wide thin-walled aluminum profiles in this embodiment has a reasonable structural design and is easy to use. This structure can also be used for other equipment with similar usage requirements. In this embodiment, the extrusion cylinder for preparing wide thin-walled aluminum profiles solves the problem that traditional round ingots are difficult to extrude wide thin-walled aluminum profiles. When producing the same wide thin-walled aluminum profiles, the required equipment tonnage is greatly reduced, the production difficulty is greatly reduced, and equipment investment and production costs are saved.

[0051] Example 2

[0052] This application also provides an embodiment 2, such as Figures 7-8 As shown, as a variation of Embodiment 1, Embodiment 2 differs from Embodiment 1 only in the extrusion cylinder body 1, specifically as follows: The extrusion cylinder body 1 includes a second cylinder 14 and a third cylinder 15, which are detachably connected. A first inner cavity 11 is disposed within the second cylinder 14, and a second inner cavity 12 is disposed within the third cylinder 15. The third cylinder 15 can be replaced to accommodate second inner cavities 12 of different shapes and sizes, improving flexibility. This flexibility allows the extrusion cylinder to adapt to different production needs, whether for producing extruded profiles of different sizes, shapes, or performance requirements, or for use in different production environments. Furthermore, due to the third cylinder... The body 15 is detachable. When the shape of the second inner cavity 12 needs to be changed, only the third cylinder body 15 needs to be replaced, instead of the entire extrusion cylinder. This effectively reduces manufacturing costs. In addition, if the third cylinder body 15 is damaged during use, it can be easily replaced, improving equipment maintenance and repair efficiency, reducing downtime, and increasing production efficiency. More specifically, by designing the extrusion cylinder as detachable, standardized and modular production can be achieved. Enterprises can manufacture a series of standardized third cylinder bodies 15 and then assemble them according to customer needs to meet different second inner cavity 12 shape requirements. This helps to simplify production and inventory management and improve production efficiency.

[0053] This embodiment also provides an extrusion apparatus for preparing wide-width thin-walled aluminum profiles, including an extrusion rod, an extrusion die 2, and the aforementioned extrusion cylinder for preparing wide-width thin-walled aluminum profiles. The outlet end of the second inner cavity 12 is connected to the extrusion die 2, and the extrusion rod can enter the first inner cavity 11. In this embodiment, the extrusion die 2 includes an upper die 21 and a lower die 22. The upper die 21 has multiple axially penetrating diversion holes 211. The lower die 22 has a die cavity 221, a lower die working belt 222, and a profile outlet 223 arranged sequentially from top to bottom. The two flow holes 211 are connected to each other and the flow outlet 223. Each flow hole 211 is connected to the mold cavity 221. The outlet end of the second inner cavity 12 is connected to each flow hole 211. The design of the flow holes 211 allows the metal to flow into the mold cavity 221 more evenly during the extrusion process. Through multiple flow holes 211, the metal is dispersed and transported into the mold cavity 221. Under the action of pressure and high temperature, the round ingot is fused in the mold cavity 221 and forced to flow out from the gap formed by the upper mold 21 and the lower mold working zone 222, thereby producing wide thin-walled profiles of specific shapes and sizes.

[0054] As a preferred embodiment of the present invention, it may also have the following additional technical features: the cross-sectional area of ​​the end of each diversion hole 211 near the second inner cavity 12 is smaller than the cross-sectional area of ​​the end of each diversion hole 211 near the lower die 22. The smaller cross-sectional area of ​​the end of the diversion hole 211 near the second inner cavity 12 can limit the flow velocity of metal in this area. By reducing the cross-sectional area, the resistance to metal flow is increased, thereby slowing down the flow velocity of metal. The larger cross-sectional area of ​​the end of each diversion hole 211 near the lower die 22 is beneficial to metal welding. By increasing the area of ​​the diversion hole 211, the number of diversion holes 211 is reduced, thereby reducing the number of weld seams and reducing the extrusion pressure.

[0055] Please refer to the following: Figure 9 This embodiment also provides an extrusion method for preparing wide, thin-walled aluminum profiles, applied to the above-mentioned extrusion apparatus for preparing wide, thin-walled aluminum profiles, comprising the following steps:

[0056] S1. Heat the extrusion cylinder and ensure uniform temperature. The extrusion cylinder temperature is 390℃-410℃.

[0057] S2. Prepare round ingots and place them in an induction furnace for heating at a temperature of 460℃-500℃.

[0058] S3. Preheat the extrusion die 2 and keep it at 440℃-460℃ in the die heating furnace for 5-8 hours;

[0059] S4. Install the extrusion die 2 on the extrusion die holder and fit it tightly against the extrusion cylinder outlet end without leaving any gaps to prevent aluminum from flowing out of the gaps.

[0060] S5. Place the round ingot into the extrusion cylinder body 1 and push it in from the inlet end of the extrusion cylinder body 1. Under the action of the extrusion rod, it moves forward at a set speed and passes through the first inner cavity 11 and the second inner cavity 12 in sequence. With the metal volume remaining unchanged, the height of the round ingot continuously decreases, the metal on both sides expands to the left and right, and the width continuously increases. At the outlet, it gradually becomes a flat rectangular ingot with a certain width-to-height ratio. Finally, it is formed from the extrusion die 2 to produce a wide thin-walled aluminum profile.

[0061] The extrusion cylinder for preparing wide thin-walled aluminum profiles in this embodiment has a reasonable structural design and is easy to use. This structure can also be used for other equipment with similar usage requirements. In this embodiment, the extrusion cylinder for preparing wide thin-walled aluminum profiles solves the problem that traditional round ingots are difficult to extrude wide thin-walled aluminum profiles. When producing the same wide thin-walled aluminum profiles, the required equipment tonnage is greatly reduced, the production difficulty is greatly reduced, and equipment investment and production costs are saved.

[0062] In the description of the above embodiments, "greater than," "less than," and "exceeding" are understood to exclude the stated number; "several" and "more than" mean one or more; and "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0063] 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.

[0064] The embodiments described above are merely examples 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. An extrusion cylinder for preparing wide, thin-walled aluminum profiles, characterized in that, include: The extrusion cylinder body (1) is provided with a first inner cavity (11) and a second inner cavity (12). The first inner cavity (11) and the second inner cavity (12) are connected. The outlet end of the first inner cavity (11) and the inlet end of the second inner cavity (12) are smoothly transitioned. The width of the outlet end of the second inner cavity (12) is greater than the diameter of the first inner cavity (11), and the height of the outlet end of the second inner cavity (12) is less than the diameter of the first inner cavity (11). The cross-sectional area of ​​the outlet end of the second inner cavity (12) is less than the cross-sectional area of ​​the inlet end of the second inner cavity (12). The width-to-height ratio of the outlet end of the second inner cavity (12) is set to be between 1.5 and 10. The center lines of the first inner cavity (11) and the second inner cavity (12) are located at the same position in the horizontal direction.

2. The extrusion cylinder for preparing wide, thin-walled aluminum profiles according to claim 1, characterized in that, The outlet end of the first inner cavity (11) matches the shape and size of the inlet end of the second inner cavity (12), and the outlet end of the second inner cavity (12) is set to be rectangular.

3. The extrusion cylinder for preparing wide-width thin-walled aluminum profiles according to any one of claims 1-2, characterized in that, The extrusion cylinder body (1) includes a first cylinder (13), the first inner cavity (11) and the second inner cavity (12) are disposed in the first cylinder (13), and the first inner cavity (11) and the second inner cavity (12) are integrally formed with the first cylinder (13).

4. The extrusion cylinder for preparing wide-width thin-walled aluminum profiles according to any one of claims 1-2, characterized in that, The extrusion cylinder body (1) includes a second cylinder (14) and a third cylinder (15), the second cylinder (14) and the third cylinder (15) are detachably connected, the first inner cavity (11) is disposed in the second cylinder (14), and the second inner cavity (12) is disposed in the third cylinder (15).

5. An extrusion apparatus for producing wide, thin-walled aluminum profiles, characterized in that, It includes an extrusion rod, an extrusion die (2), and an extrusion cylinder for preparing wide thin-walled aluminum profiles as described in any one of claims 1-2, wherein the outlet end of the second inner cavity (12) is connected to the extrusion die (2), and the extrusion rod can enter the first inner cavity (11).

6. The extrusion apparatus for preparing wide, thin-walled aluminum profiles according to claim 5, characterized in that, The extrusion die (2) includes an upper die (21) and a lower die (22). The upper die (21) has multiple axially penetrating diversion holes (211). The lower die (22) is provided with a die cavity (221), a lower die working belt (222) and a profile outlet (223) arranged sequentially from top to bottom. The die cavity (221), the lower die working belt (222) and the profile outlet (223) are interconnected. Each diversion hole (211) is connected to the die cavity (221). The outlet end of the second inner cavity (12) is connected to each diversion hole (211).

7. An extrusion method for preparing wide-width thin-walled aluminum profiles, applied to the extrusion apparatus for preparing wide-width thin-walled aluminum profiles as described in claim 6, characterized in that, Includes the following steps: S1. Heat the extrusion cylinder and ensure uniform temperature; S2. Prepare round ingots and heat them. S3. Preheat the extrusion die (2); S4. Install the extrusion die (2) on the extruder die holder and fit it tightly against the extrusion cylinder outlet end; S5. Place the round ingot into the extrusion cylinder body (1) and push it in from the inlet end of the extrusion cylinder body (1). Under the action of the extrusion rod, it moves forward at a set speed, passing through the first inner cavity (11) and the second inner cavity (12) in sequence, and finally forming a wide thin-walled aluminum profile from the extrusion die (2).

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