Aluminum alloy profile extrusion die

Abstract

The utility model provides an aluminum alloy section extrusion die which comprises a die body, a first cavity and a second cavity, the die body is provided with a feeding end and a discharging end which are oppositely arranged along a first direction, the first cavity and the second cavity are communicated with each other along a second direction, and an included angle is formed between the extending directions of the first cavity and the second cavity on a section perpendicular to the first direction; a first working belt forming a first forming cavity is arranged on the side wall of the first cavity, and the end, facing the second cavity, of the first forming cavity is of a first opening structure; a second working belt of a second forming cavity is arranged on the side wall of the second cavity, the end, facing the first cavity, of the second forming cavity is of a second opening structure, and on the section perpendicular to the first direction, the width size of the longitudinal section of the first forming cavity is smaller than that of the longitudinal section of the second forming cavity; the width of the first working tape is smaller than that of the second working tape. According to the scheme, the problem that the profile is prone to deflection and deformation during extrusion can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminium alloy section bar extrusion die technical field, specifically, relate to a kind of aluminium alloy section bar extrusion die. BACKGROUND

[0002] In the extrusion production of aluminium alloy section bar, die design is the key factor to ensure the dimensional accuracy of section bar, surface quality and production efficiency.

[0003] Generally, the die is provided with a forming cavity, and the material enters the forming cavity from the feeding end of the die. Under the shaping action of the forming cavity, the shaped section bar is output from the discharging end of the die. Specifically, during the process of the material passing through the forming cavity, the longitudinal section profile of the section bar is shaped into the same shape as the profile of the forming cavity. Generally, the profile of the longitudinal section of the forming cavity is the same at each point along the extrusion direction of the section bar. The profile of the forming cavity is adapted to the design profile of the section bar. When the extruded section bar includes a first segment and a second segment connected to each other, the first segment and the second segment have an included angle, and the width of the profile of the longitudinal section of the first segment is less than the width of the profile of the longitudinal section of the second segment, the corresponding die forming cavity includes a first chamber and a second chamber connected to each other, the first chamber is adapted to the first segment, and the second chamber is adapted to the second segment; and the width of the profile of the first chamber along the direction perpendicular to the extrusion direction of the section bar is less than the width of the profile of the second chamber along the direction perpendicular to the extrusion direction of the section bar. During the process of the material passing through the above-mentioned forming cavity, the material may have different extrusion speeds, and the section bar may be easily deflected and deformed during extrusion, affecting the processing quality of the section bar. SUMMARY

[0004] The utility model provides a kind of aluminium alloy section bar extrusion die, to solve the problem that the width of the profile of the first chamber of forming cavity along the direction perpendicular to the extrusion direction of the section bar is less than the width of the profile of the second chamber along the direction perpendicular to the extrusion direction of the section bar, during the process of the material passing through the above-mentioned forming cavity, the material may have different extrusion speeds, and the section bar may be easily deflected and deformed during extrusion, affecting the processing quality of the section bar.

[0005] The utility model provides a kind of aluminium alloy profile extrusion die, aluminium alloy profile extrusion die includes: mould body, with the feed end and discharge end of relative arrangement along first direction, mould body has first chamber and second chamber along second direction intercommunication, on the section perpendicular to first direction, there is included angle between the extension direction of first chamber and the extension direction of second chamber;First chamber is provided with first working zone on side wall, and first working zone forms first forming cavity, and the end of first forming cavity towards second chamber is first opening structure;Second chamber is provided with second working zone on side wall, and second working zone forms second forming cavity, and the end of second forming cavity towards first chamber is second opening structure, on the section perpendicular to first direction, the width size of the longitudinal section of first forming cavity is less than the width size of the longitudinal section of second forming cavity, along first direction, the width size of first working zone is less than the width size of second working zone.

[0006] Further, the first working zone has two first side walls arranged oppositely, and along the first direction, the width size of the end of the first side wall away from the second chamber is less than the width size of the end of the first side wall close to the second chamber.

[0007] Further, the first side wall includes a first section, a transition section and a second section connected to each other in the direction from the first chamber to the second chamber, and along the first direction, the width size of the first section is less than the width size of the second section, and along the direction from the first section to the second section, the width size of the transition section gradually increases.

[0008] Further, the first working zone further has a first connecting wall, two ends of the first connecting wall are connected to the ends of the two first side walls away from the second chamber, and along the first direction, the width size of the first connecting wall is the same as the width size of the ends of the first side walls away from the second chamber.

[0009] Further, the side of the second chamber close to the feed end is further provided with a transition working zone, the transition working zone forms a transition chamber, the end of the transition chamber towards the first chamber forms a third opening structure, the side of the transition chamber away from the feed end is communicated with the second forming cavity, and the cross-sectional area of the transition chamber perpendicular to the first direction gradually decreases.

[0010] Further, the taper angle of the side wall of the transition chamber is set to 2° to 4°.

[0011] Further, on the section perpendicular to the first direction, the contour of the end of the transition chamber communicated with the second forming cavity is the same as the contour of the second forming cavity.

[0012] Further, the second working zone comprises two second side walls arranged oppositely, and the second working zone further comprises a second connecting wall, two ends of the second connecting wall are connected with two ends of the two second side walls away from the first cavity respectively, and one end of the second connecting wall close to the discharging end protrudes the second side wall in a direction away from the feeding end.

[0013] Further, along the distribution direction of the two second side walls, the width dimension of the part of the second connecting wall protruding the second side wall in the direction away from the feeding end gradually decreases.

[0014] Further, the second working zone further comprises two third connecting walls arranged oppositely with the second connecting wall, the two third connecting walls are distributed in the distribution direction of the two second side walls at intervals, the third connecting wall is arranged one by one with the second side wall, one end of the third connecting wall is connected with the corresponding second side wall away from one end of the second connecting wall, the mutually close ends of the two third connecting walls have a spacing and form a second opening structure, and one end of the third connecting wall corresponding to the discharging end protrudes the second side wall in a direction away from the feeding end.

[0015] Further, along the distribution direction of the two second side walls, the width dimension of the part of the third connecting wall protruding the second side wall in the direction away from the feeding end gradually decreases.

[0016] Further, the first cavity and the second cavity in mutual communication form a profile forming cavity, and the aluminum alloy profile extrusion die further has a flow guide cavity, the flow guide cavity is located upstream of the profile forming cavity and in mutual communication with the profile forming cavity, and a projection of the profile forming cavity on the flow guide cavity is located within the contour of the flow guide cavity.

[0017] Further, the two walls of the first forming cavity in mutual connection are connected by an arc transition; and / or, the two walls of the second forming cavity in mutual connection are connected by an arc transition.

[0018] The utility model discloses a technical scheme, and the longitudinal section of the aluminum alloy section bar after processing and forming includes the first section and the second section, the contour of the first section is same with the contour of the first forming cavity, and the contour of the second section is same with the contour of the second forming cavity, that is, the width size of the first section of the section bar after processing is less than the width size of the second section. When the aluminum alloy section bar extrusion die of the scheme is applied to the extrusion of the section bar, the material enters the first chamber and the second chamber from the feeding end, the first forming cavity formed by the first work belt in the first chamber shapes the material, and the second forming cavity formed by the second work belt in the second chamber shapes the material, and finally the target product is formed. Since the width size of the longitudinal section of the first forming cavity is less than the width size of the longitudinal section of the second forming cavity, when the material passes through the first forming cavity, the friction force of the first work belt to the material is greater than the friction force of the second work belt to the material when the material passes through the second forming cavity, so that the flow rate of the material passing through the first forming cavity is less than the flow rate when the material passes through the second forming cavity. The width size of the first work belt along the first direction is designed to be less than the width size of the second work belt along the first direction in the scheme, so that the friction force of the first work belt to the corresponding material is reduced, the flow rate of the material passing through the first work belt is relatively increased, and the material entering the first chamber and the second chamber at the same time is extruded at the same time as far as possible. That is, in the scheme, the design that the width of the second work belt is wider than the width of the first work belt along the first direction minimizes the difference between the flow rate of the material in the second chamber and the flow rate of the material in the first chamber, thereby reducing or avoiding the distortion or deformation of the product in the forming process, ensuring the straightness and size consistency of the section bar, and improving the product quality. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application. In the drawings:

[0020] Figure 1 A structure schematic view of a mold body provided by the utility model is shown;

[0021] Figure 2 A structure schematic view of a first visual angle of a sectional view of the mold body provided by the utility model is shown;

[0022] Figure 3 A structure schematic view of a second visual angle of the sectional view of the mold body provided by the utility model is shown;

[0023] Figure 4 A structure schematic view of a third visual angle of the sectional view of the mold body provided by the utility model is shown;

[0024] Figure 5The sectional structure schematic diagram of the aluminum alloy profile extrusion die is shown.

[0025] Among them, the above-mentioned drawings include the following reference signs:

[0026] 10, mold body;

[0027] 20, first chamber;

[0028] 30, second chamber;

[0029] 40, first working zone; 401, first forming cavity;

[0030] 41, first side wall; 411, first section; 412, transition section; 413, second section;

[0031] 42, first connecting wall;

[0032] 50, second working zone; 501, second forming cavity;

[0033] 51, second side wall; 52, second connecting wall; 53, third connecting wall;

[0034] 60, transition working zone; 601, transition chamber;

[0035] 70, profile forming cavity;

[0036] 80, flow guide cavity;

[0037] 90, avoidance cavity;

[0038] 100, mold support pad. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0040] As Figures 1 to 4The utility model provides a kind of aluminium alloy profile extrusion die, aluminium alloy profile extrusion die includes mould body 10, mould body 10 has the feed end and discharge end oppositely arranged along first direction, mould body 10 has the first chamber 20 and second chamber 30 along second direction intercommunication, in the section perpendicular to first direction, the extension direction between first chamber 20 and the extension direction of second chamber 30 has included angle;First chamber 20 is provided with first working zone 40 on side wall, and first working zone 40 forms first forming cavity 401, and the end of first forming cavity 401 towards second chamber 30 is first opening structure;Second chamber 30 is provided with second working zone 50 on side wall, and second working zone 50 forms second forming cavity 501, and the end of second forming cavity 501 towards first chamber 20 is second opening structure, in the section perpendicular to first direction, the width size of the longitudinal section of first forming cavity 401 is less than the width size of the longitudinal section of second forming cavity 501, along first direction, the width size of first working zone 40 is less than the width size of second working zone 50.

[0041] For the convenience of understanding, in the embodiment of the present scheme, define Figure 1 And Figure 4 X direction in the above formula is first direction, z direction is second direction, and y direction is third direction.

[0042] The utility model discloses a technical scheme, and the longitudinal section of the aluminum alloy section bar after processing and forming includes the first section and the second section, the contour of the first section is same with the contour of the first forming cavity 401, and the contour of the second section is same with the contour of the second forming cavity 501, that is, the width size of the first section of the processed section bar is less than the width size of the second section.

[0043] In the scheme, the first chamber 20 and the second chamber 30 are in communication to form a section bar forming cavity 70.

[0044] The profile shape of the longitudinal section of the section bar forming cavity 70 is not limited in the scheme.

[0045] In some embodiments of the scheme, the profile shape of the longitudinal section of the section bar forming cavity 70 is L-shaped.

[0046] In the embodiments of the scheme, the profile shape of the longitudinal section of the section bar forming cavity 70 is taken as an example in the form of T-shaped. The first section and the second section of the extruded section bar are perpendicular to each other, that is, the first chamber 20 is perpendicular to the second chamber 30 along the extension direction of the section perpendicular to the first direction.

[0047] As Figure 1 , Figure 2 and Figure 4As shown, further, the first working zone 40 has two first side walls 41 oppositely arranged along the third direction, and along the first direction, the width dimension of the first side wall 41 away from the second chamber 30 is smaller than that of the first side wall 41 close to the second chamber 30. In the present scheme, the material is three-sidedly blocked when passing through the portion of the first forming cavity 401 away from the second chamber 30, and the flow rate of the material at this portion is slower than that of the portion of the first forming cavity 401 close to the second chamber 30. Therefore, the width dimension of the first side wall 41 away from the second chamber 30 is set to be smaller than that of the first side wall 41 close to the second chamber 30. In this way, the inhibitory effect of the first working zone 40 on the flow rate of the material at the portion of the first forming cavity 401 away from the second chamber 30 is weakened, so that the flow rate of the material at the portion of the first forming cavity 401 away from the second chamber 30 is closer to that of the portion of the first forming cavity 401 close to the second chamber 30, and the uniformity of the flow rate of the material in the first chamber 20 is improved.

[0048] As shown in Figure 2 and 3 As shown, further, the first side wall 41 comprises a first section 411, a transition section 412 and a second section 413 connected to each other along the direction from the first chamber to the second chamber, and along the first direction, the width dimension of the first section 411 is smaller than that of the second section 413, and along the direction from the first section 411 to the second section 413, the width dimension of the transition section 412 gradually increases. In the present scheme, the first section 411 of the first side wall 41 is close to the end of the first forming cavity 401 away from the second chamber 30, where the material is three-sidedly blocked and the flow rate is slow. Therefore, the width dimension of the first section 411 is set to be smaller than that of the second section 413, so that the flow rate of the material in the first forming cavity 401 is more uniform.

[0049] The transition section 412 serves as an intermediate transition between the first section 411 and the second section 413, so that along the direction from the first section 411 to the second section 413, the inhibitory effect of the first working zone 40 on the flow rate of the material gradually increases, reducing the occurrence of unstable flow rate caused by sudden change in the length of the first working zone 40, and improving the controllability and stability of the flow rate of the material.

[0050] In some other embodiments of the present scheme, the width of the first side wall 41 gradually increases along the direction from the first forming cavity 401 to the second chamber 30.

[0051] As shown in Figures 1 to 4As shown, further, the first working zone 40 also has a first connecting wall 42, two ends of the first connecting wall 42 are connected with the ends of the two first side walls 41 away from the second chamber 30, in the first direction, the width dimension of the first connecting wall 42 is the same as the width dimension of the ends of the first side walls 41 away from the second chamber 30. The first connecting wall 42 is connected with the two first side walls 41 to form a three-sided closed profile extrusion channel, and the width dimension of the first connecting wall 42 is the same as that of the first section 411, so that the inhibitory effect on the material flow rate at the end of the first forming cavity 401 away from the second chamber 30 is more uniform and smooth.

[0052] Further, the side of the second chamber 30 close to the feeding end is also provided with a transition working zone 60, the transition working zone 60 forms a transition chamber 601, the end of the transition chamber 601 towards the first chamber 20 forms a third opening structure, the side of the transition chamber 601 away from the feeding end is in communication with the second forming cavity 501, and the cross-sectional area of the transition chamber 601 perpendicular to the first direction gradually decreases. In the embodiment of the present scheme, the material flow rate in the second chamber 30 is relatively fast, by setting the transition working zone 60 to form the transition chamber 601, and gradually reducing the cross-sectional area of the transition chamber 601 perpendicular to the first direction in the direction from the feeding end to the discharging end, such a setting makes the transition working zone 60 able to gradually slow down the flow speed of the material before entering the second forming cavity 501, so that the material can enter the second forming cavity 501 more smoothly, further improving the uniformity and stability of the material flow, which helps to improve the quality uniformity of the formed aluminum alloy profile.

[0053] In the embodiment of the present scheme, the taper angle of the side wall of the transition chamber 601 is set to 2° to 4°. Such a design can effectively slow down the flow speed of the material in the transition chamber 601, and also will not affect the overall uniformity of the material flow speed due to the slow flow speed of the material.

[0054] Among them, the taper angle of the side wall of the transition chamber 601 can be set to 2°, 3° or 4°.

[0055] Further, on the cross section perpendicular to the first direction, the profile of the end of the transition chamber 601 in communication with the second forming cavity 501 is the same as that of the second forming cavity 501. Such a setting can maintain the stability of the material flow speed at the mutual communication place of the second forming cavity 501 and the transition chamber 601, so that the material can enter the second forming cavity 501 more smoothly and smoothly.

[0056] Further, the second working zone 50 comprises two second side walls 51 oppositely arranged along the third direction, and further comprises a second connecting wall 52, two ends of the second connecting wall 52 are connected with the ends of the two second side walls 51 away from the first cavity 20, and the end of the second connecting wall 52 close to the discharge end protrudes the second side wall 51 away from the feeding end. In the embodiment of the present scheme, the material is blocked on three sides at the end of the second side wall 51 away from the first cavity 20 when passing through the second forming cavity 501, and the flow speed of the material is slower than that of the material close to the second opening structure in the second forming cavity 501. In the cross section perpendicular to the first direction, the length dimension of the second forming cavity 501 is greater than the height dimension of the second forming cavity 501, and the width dimension of the second connecting wall 52 along the first direction is designed to be greater than the width dimension of the second side wall 51 along the first direction, so that the second side wall 51 has a weaker effect on the slowing down of the material flow speed than the second connecting wall 52, and the flow speed of the material in the second forming cavity 501 is more uniform.

[0057] Further, along the distribution direction of the two second side walls 51, the width dimension of the part of the second connecting wall 52 protruding the second side wall 51 away from the feeding end gradually decreases. In this way, along the direction from the center of the second connecting wall 52 to the two second side walls 51, the slowing down effect of the second connecting wall 52 on the material flow speed gradually weakens, further improving the uniformity of the overall material flow speed in the second forming cavity 501.

[0058] Further, the second working zone 50 further comprises two third connecting walls 53 oppositely arranged with the second connecting wall 52, the two third connecting walls 53 are spaced apart along the distribution direction of the two second side walls 51, and the third connecting wall 53 is arranged one by one with the second side wall 51, one end of the third connecting wall 53 is connected with the end of the corresponding second side wall 51 away from the second connecting wall 52, the mutually close ends of the two third connecting walls 53 have a spacing and form a second opening structure, and the end of the third connecting wall 53 corresponding to the discharge end protrudes the second side wall 51 away from the feeding end, and along the distribution direction of the two second side walls 51, the width dimension of the part of the third connecting wall 53 protruding the second side wall 51 away from the feeding end gradually decreases. In the present scheme, the projection of the two third connecting walls 53 along the second direction is located on the second connecting wall 52, so that the third connecting wall 53 can have the same slowing down effect on the material flow speed as the second connecting wall 52, so that the flow speed of the material in the second forming cavity 501 is more uniform, and the situation of local defects in the processed aluminum alloy profile is further reduced.

[0059] In the embodiment of the present scheme, the first working zone 40 is arranged on the side of the first cavity 20 close to the feeding end and is connected to the arc transition of the end of the transition working zone 60 away from the second working zone 50. The side of the first working zone 40 close to the feeding end is flush with the side of the transition working zone 60 close to the feeding end. In this way, the convenience of the mold processing can be improved.

[0060] As shown in Figure 1 , further, the first cavity 20 and the second cavity 30 in communication with each other form a profile forming cavity 70, and the aluminum alloy profile extrusion die further has a flow guide cavity 80, which is located upstream of the profile forming cavity 70 and is in communication with the profile forming cavity 70, and the projection of the profile forming cavity 70 on the flow guide cavity 80 is located within the profile of the flow guide cavity 80. In this way, the stability and uniformity of the material flow can be further improved, and the quality of the processed aluminum alloy profile can be improved.

[0061] The flow guide cavity 80 can pre-distribute the flow speed of the material before the material enters the profile forming cavity 70, so that the material can enter the profile forming cavity 70 more smoothly and stably, reduce the bending deformation of the aluminum alloy profile, and improve the reliability of the aluminum alloy profile extrusion die.

[0062] In the embodiment of the present scheme, the two side walls of the flow guide cavity 80 are connected by an arc transition. In this way, the flow guiding effect of the flow guide cavity 80 can be improved.

[0063] As shown in Figure 2 , further, the two walls of the first forming cavity 401 are connected by an arc transition; and / or, the two walls of the second forming cavity 501 are connected by an arc transition. In this way, the connection between the two walls of the first forming cavity 401 and the second forming cavity 501 is more gentle and smooth, the geometry of the aluminum alloy profile extrusion die is optimized, the flow rate of the material at the connection between the two walls is more stable, and the occurrence of local defects in the processed aluminum alloy profile can be reduced.

[0064] As shown in Figure 5 , in the embodiment of the present scheme, the aluminum alloy profile extrusion die further has an empty cavity 90, which is arranged behind the profile forming cavity 70 in the direction from the feeding end to the discharging end, and the projection of the profile forming cavity 70 is located within the empty cavity 90. The empty cavity 90 can guide the discharging of the processed aluminum alloy profile.

[0065] In the embodiment of the present scheme, the aluminum alloy profile extrusion die further comprises a die support pad 100, which is arranged behind the die body 10 in the direction from the feeding end to the discharging end, and the central axis of the die support pad 100 is coaxial with the central axis of the die body 10, and the die support pad 100 supports the die body 10, so that the die body 10 is more stable during the extrusion processing of the aluminum alloy profile. The die support pad 100 is provided with a material discharging cavity, and the projection of the profile forming cavity 70 is located in the material discharging cavity, so that the die support pad 100 does not interfere with the output path of the extruded aluminum alloy profile.

[0066] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0067] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the embodiments are not intended to limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but under appropriate circumstances, the techniques, methods and devices should be considered as part of the specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0068] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0069] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0070] In addition, it should be noted that the use of "first", "second", and the like words of distinction do not connote any meaning of importance, but are used only to distinguish one element from another, and are used in the context of this application only for ease of description. Thus, the use of such terms is not intended to limit the scope of the present application.

[0071] The preferred embodiments of the present application have been described above with the purpose of enabling not only the best modes of practicing the application known to the inventors at this time, but also of enabling others skilled in the art to utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated. Therefore, the above description is intended to be illustrative, but not restrictive, of the scope of the present application. All patents and patent applications mentioned herein are incorporated by reference in their entirety.

Claims

1. An aluminium alloy profile extrusion die characterised in that, The aluminum alloy profile extrusion die comprises: The die body (10) has a feeding end and a discharging end oppositely arranged along a first direction, the die body (10) has a first chamber (20) and a second chamber (30) which are in communication with each other along a second direction, in a cross section perpendicular to the first direction, the extension direction of the first chamber (20) and the extension direction of the second chamber (30) have an included angle; a first working belt (40) is arranged on the side wall of the first chamber (20), the first working belt (40) forms a first forming cavity (401), one end of the first forming cavity (401) towards the second chamber (30) is a first opening structure; a second working belt (50) is arranged on the side wall of the second chamber (30), the second working belt (50) forms a second forming cavity (501), one end of the second forming cavity (501) towards the first chamber (20) is a second opening structure, in a cross section perpendicular to the first direction, the width dimension of the longitudinal section of the first forming cavity (401) is smaller than the width dimension of the longitudinal section of the second forming cavity (501), along the first direction, the width dimension of the first working belt (40) is smaller than the width dimension of the second working belt (50).

2. The aluminum alloy profile extrusion die of claim 1, wherein, The first working belt (40) has two first side walls (41) oppositely arranged, along the first direction, the width dimension of one end of the first side wall (41) away from the second chamber (30) is smaller than the width dimension of one end of the first side wall (41) close to the second chamber (30).

3. The aluminum alloy profile extrusion die of claim 2, wherein, The first side wall (41) comprises a first section (411), a transition section (412) and a second section (413) which are connected to each other along the direction from the first chamber to the second chamber, along the first direction, the width dimension of the first section (411) is smaller than the width dimension of the second section (413), along the direction from the first section (411) to the second section (413), the width dimension of the transition section (412) gradually increases.

4. The aluminum alloy profile extrusion die of claim 3, wherein, The first working belt (40) also has a first connecting wall (42), two ends of the first connecting wall (42) are connected to one end of the two first side walls (41) away from the second chamber (30) respectively, along the first direction, the width dimension of the first connecting wall (42) is the same as the width dimension of one end of the first side wall (41) away from the second chamber (30).

5. The aluminum alloy profile extrusion die of claim 1, wherein, The second chamber (30) close to the feeding end side is also provided with a transition working belt (60), the transition working belt (60) forms a transition chamber (601), one end of the transition chamber (601) towards the first chamber (20) forms a third opening structure, the side of the transition chamber (601) away from the feeding end is in communication with the second forming cavity (501), the cross section area of the transition chamber (601) perpendicular to the first direction gradually decreases.

6. The aluminum alloy profile extrusion die of claim 5, wherein, The taper angle of the side wall of the transition chamber (601) is arranged at 2° to 4°.

7. The aluminum alloy profile extrusion die of claim 5, wherein, In a cross section perpendicular to the first direction, a profile of an end of the transition chamber (601) communicating with the second forming cavity (501) is the same as a profile of the second forming cavity (501).

8. The aluminum alloy profile extrusion die of claim 1, wherein, The second working zone (50) comprises two second side walls (51) oppositely arranged, and further comprises a second connecting wall (52), two ends of the second connecting wall (52) are connected with two ends of the second side walls (51) away from the first chamber (20), and an end of the second connecting wall (52) close to the discharge end protrudes the second side wall (51) away from the feeding end.

9. The aluminum alloy profile extrusion die of claim 8, wherein, Along the distribution direction of the two second side walls (51), the width dimension of the part of the second connecting wall (52) protruding the second side wall (51) away from the feeding end gradually decreases.

10. The aluminum alloy profile extrusion die of claim 9, wherein, The second working zone (50) further comprises two third connecting walls (53), the two third connecting walls (53) are oppositely arranged with the second connecting wall (52), the two third connecting walls (53) are spaced apart along the distribution direction of the two second side walls (51), the third connecting wall (53) is arranged one by one with the second side wall (51), one end of the third connecting wall (53) is connected with the corresponding second side wall (51) away from the second connecting wall (52), and the mutually close ends of the two third connecting walls (53) have a spacing and form the second opening structure, and one end of the third connecting wall (53) corresponding to the discharge end protrudes the second side wall (51) away from the feeding end.

11. The aluminum alloy profile extrusion die of claim 10, wherein, Along the distribution direction of the two second side walls (51), the width dimension of the part of the third connecting wall (53) protruding the second side wall (51) away from the feeding end gradually decreases.

12. The aluminum alloy profile extrusion die of claim 1, wherein, The first chamber (20) and the second chamber (30) in mutual communication form a profile forming cavity (70), the aluminum alloy profile extrusion die further has a flow guide cavity (80), the flow guide cavity (80) is located upstream of the profile forming cavity (70) and in mutual communication with the profile forming cavity (70), and a projection of the profile forming cavity (70) on the flow guide cavity (80) is located within a profile of the flow guide cavity (80).

13. The aluminum alloy profile extrusion die of claim 1, wherein, Two wall surfaces of the first forming cavity (401) in mutual connection are connected by a circular arc transition; and / or, Two wall surfaces of the second forming cavity (501) in mutual connection are connected by a circular arc transition.

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