An industrial aluminum profile extrusion die with large thickness difference

Abstract

This utility model discloses an industrial aluminum profile extrusion die with a large thickness difference. It includes an integrally formed extrusion die with a flat surface at one end serving as the feed side and a flat surface at the other end serving as the discharge side. A recessed guide pit is provided on the feed side, with its inner bottom surface serving as the feed surface. An axially penetrating forming working band is provided on the feed surface, and the forming working band has the same cross-sectional shape as the workpiece with the large thickness difference. The guide pit is configured with a narrow flow channel corresponding to the thick-walled portion of the aluminum profile workpiece and a wide flow channel corresponding to the thin-walled portion. Through targeted structural design and parameter settings, the quality problems in the extrusion process of U-shaped aluminum profiles with large thickness and thin-walled sections are solved from multiple aspects, including material feeding guidance, flow channel control, and optimization of the forming working band. Simultaneously, considering low-cost requirements, the die structure is simple and easy to process, effectively reducing procurement costs and providing a reliable die solution for producing high-quality and low-cost aluminum profiles.

Description

Technical Field

[0001] This utility model relates to the field of aluminum profile extrusion die technology, specifically to an industrial aluminum profile extrusion die with a large thickness difference. Background Technology

[0002] Aluminum profile extrusion dies are the core process equipment in aluminum profile production, and their technical level directly determines the forming quality, production efficiency, and application range of aluminum profiles. The principle of aluminum profile extrusion is as follows: heated aluminum alloy round ingots ("aluminum bars") are subjected to high pressure through an extruder, forcing the aluminum material through the "cavity" of the die (a channel with the same cross-section as the target aluminum profile), and finally extruding a profile with the same shape as the cavity.

[0003] When faced with the challenge of producing aluminum profiles with both thick and thin walls, and a significant difference in wall thickness between the thick and thin walls, the aluminum profiles should be... Figure 8 As shown, the aluminum profile is generally U-shaped. The profile has thick walls at the U-turn and thin walls on both sides of the U-shape, with a significant difference in wall thickness. If the aluminum material is not fed and distributed properly during the extrusion process, the produced aluminum profile will have a large color difference and poor quality. It may even have surface defects such as material shortage in the thin-walled areas due to slow material output, resulting in unstable product dimensions.

[0004] Conventional extrusion dies facing this situation typically have a dedicated guide plate at the front of the feed line. This guide plate pre-distributes the material evenly between the thick-walled and thin-walled sections, creating some resistance in the thick-walled sections while ensuring sufficient material supply to the thin-walled sections during extrusion. This allows for simultaneous and even extrusion of both thick and thin-walled sections. However, this approach has drawbacks: the internal structure of the extrusion die is complex, the machining and design are intricate, and the manufacturing cost is high, making it less suitable for users with limited budgets.

[0005] For the reasons mentioned above, it is necessary to propose an industrial aluminum profile extrusion die with a large thickness difference to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to overcome the defects in the existing technology and provide an industrial aluminum profile extrusion die with large thickness difference, so that customers can still meet the production requirements of aluminum profiles with large thickness difference even with limited procurement costs.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: An industrial aluminum profile extrusion die with a large thickness difference includes an integrally formed extrusion die, which has a flat cylindrical structure, with one end of the die serving as the feed side and the other end serving as the discharge side. A concave guide pit is provided on the feed side, the inner bottom surface of the guide pit is the feed surface, and a forming working belt is provided on the feed surface, the forming working belt having the same cross-sectional shape as the workpiece with a large thickness difference. The flow channel is configured as a narrow channel at the thick-walled part of the aluminum profile workpiece and as a wide channel at the thin-walled part of the aluminum profile workpiece.

[0008] Furthermore, the feed surface corresponding to the thick-walled and thin-walled sections is not on the same plane. The feed surface includes a front working surface, a rear working surface, and a transition surface. The front working surface is positioned around the thick-walled section, and the rear working surface is positioned around the thin-walled section. The front working surface and the rear working surface are connected by a transition surface, and the front working surface, the rear working surface, and the transition surface are all tangentially connected. The front working surface is positioned closer to the feed side, while the rear working surface is relatively farther away from the feed side.

[0009] Furthermore, the sidewalls of the forming working belt corresponding to the thick wall section are non-vertical sidewall structures. These non-vertical sidewall structures form a front working belt. The front working belt has a structure with a large opening at the front end and a small opening at the rear end from the feeding side to the discharging side, forming an inclined sidewall-shaped front working belt between the front end and the rear end.

[0010] Furthermore, the depth of the front working belt is 12mm, and the obstruction angle formed by the inclination of the sidewall of the front working belt is 8°.

[0011] Furthermore, the forming working belt is provided with an accelerating inclined wall at the thin-walled section. The accelerating inclined wall is located on the die hole empty knife side of the working belt at the thin-walled section. The accelerating inclined wall causes the working belt at the thin-walled section to form a funnel-shaped structure with the opening gradually expanding towards the discharge side, and the accelerating inclined wall reduces the thickness of the working belt at the thin-walled section.

[0012] Furthermore, the depth of the accelerating inclined wall is 2.5 mm, and the acceleration angle formed by the accelerating inclined wall is 8°.

[0013] The advantages and beneficial effects of this utility model are as follows: This utility model provides an industrial aluminum profile extrusion die with a large thickness difference. Through a series of targeted structural designs and parameter settings, it comprehensively solves the quality problems in the extrusion process of U-shaped aluminum profiles with a large thickness difference from thick walls, from multiple aspects such as material feeding guidance, flow channel control, and optimization of the forming working zone. At the same time, all designs take into account the need for low cost. The die structure is simple and easy to process, effectively reducing procurement costs and providing a reliable die solution for producing high-quality and low-cost aluminum profiles.

[0014] Practical verification has shown that this solution can make the aluminum flow velocity in the guide cavity more balanced and the trend more uniform. The industrial aluminum profiles produced have no color difference, higher surface quality, and more stable dimensions. Attached Figure Description

[0015] Figure 1 This is an isometric view of an industrial aluminum profile extrusion die with a large thickness difference according to this utility model; Figure 2 This is a top view of an industrial aluminum profile extrusion die with a large thickness difference according to this utility model; Figure 3 This is a utility model Figure 1 Enlarged structural diagram at point A; Figure 4 This is a utility model Figure 1 Enlarged structural diagram at point B; Figure 5 This is a utility model Figure 2 Schematic diagram of section AA; Figure 6 This is a utility model Figure 2 Schematic diagram of the structure of section BB; Figure 7 This is a utility model Figure 2 Schematic diagram of the CC section; Figure 8 It is a cross-sectional view of a workpiece with a large difference in thickness; In the diagram: 1. Thick wall section; 2. Thin wall section; 3. Extrusion die; 4. Feed side; 5. Discharge side; 6. Guide pit; 7. Feed surface; 8. Forming working zone; 9. Narrow runner; 10. Wide runner; 11. Front working surface; 12. Rear working surface; 13. Transition surface; 14. Tangential connection; 15. Front working zone; 16. Obstruction angle; 17. Accelerating inclined wall; 18. Die hole emptying tool; 19. Acceleration angle. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to examples. These examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0017] An industrial aluminum profile extrusion die with a large thickness difference, such as Figure 1-7 As shown, it includes an integrally formed extrusion die 3, which has a flat cylindrical structure. One end of the die is the feed side 4, and the other end is the discharge side 5. This embodiment features an integral design that meets the requirements of low cost, eliminates the need for complex splicing processes, reduces the number of die manufacturing steps and costs, and ensures the stability of the overall die structure, avoiding issues such as gaps at the splicing points that could affect the extrusion quality of the aluminum material. The flat cylindrical structure design facilitates installation and fixation on the extrusion equipment.

[0018] A recessed guide pit 6 is provided on the feed side 4, and the inner bottom surface of the guide pit 6 is the feed surface 7. A forming working belt 8 is provided on the feed surface 7, which runs through the axial direction. The forming working belt 8 has the same cross-sectional shape as the workpiece with a large thickness difference. The guide pit 6 can guide and gather the aluminum material entering the mold, and avoid the aluminum material being randomly distributed on the feed side 4, resulting in uneven material supply. The feed surface 7 serves as a transition area for the aluminum material to enter the forming working belt 8, ensuring that the aluminum material can smoothly enter the subsequent forming stage. The forming working belt 8 has the same cross-sectional shape as the workpiece, which is the key to achieving precise forming of the aluminum profile. It ensures that the extruded aluminum profile meets the requirements in terms of shape, solves the problem of dimensional instability from the initial guidance and forming basis, and this design does not require additional complex structures.

[0019] The flow guide pit 6 is configured as a narrow flow channel 9 corresponding to the thick-walled portion 1 of the aluminum profile workpiece, and as a wide flow channel 10 corresponding to the thin-walled portion 2 of the aluminum profile workpiece, such as... Figure 1 As shown, the thick-walled section 1 corresponds to the narrow flow channel 9. The narrow flow channel 9 controls the amount of aluminum supplied to the thick-walled section 1, preventing excessive aluminum accumulation. The thin-walled section 2 requires more aluminum to prevent material shortages. The wide flow channel 10 increases the supply of aluminum to the thin-walled section 2. This differentiated flow channel design achieves a reasonable distribution of aluminum in different wall thickness areas, effectively solving the problem of unreasonable material supply and effectively avoiding color differences and surface defects during the molding process. Its advantages lie in its targeted nature, precisely adjusting the material supply according to the needs of different wall thicknesses. The beneficial effect is reduced surface defects such as color differences and material shortages caused by uneven material supply, ensuring uniform quality across all parts of the aluminum profile. Furthermore, this design is achieved simply by changing the flow channel width, making it easy to process in mold making without significantly increasing costs, thus meeting low-cost requirements.

[0020] The feed surface 7 corresponds to the thick-walled section 1 and the thin-walled section 2, but they are not on the same plane. The feed surface 7 includes a front working surface 11, a rear working surface 12, and a transition surface 13, such as... Figure 1 , 6As shown, the front working surface 11 is positioned around the thick-walled section 1, and the rear working surface 12 is positioned around the thin-walled section 2. The front working surface 11 and the rear working surface 12 are connected by a transition surface 13, and the front working surface 11, the rear working surface 12, and the transition surface 13 are all tangentially connected 14. The front working surface 11 is positioned closer to the feeding side 4, while the rear working surface 12 is relatively farther away from the feeding side 4. The design principle is to use the height difference of the working surfaces at different positions to further adjust the flow speed and supply of aluminum. The front working surface 11 is closer to the feeding side 4, so that the aluminum can reach the area around the thick-walled section 1 faster, while the rear working surface 12 is farther away from the feeding side 4, which relatively delays the time for the aluminum to reach the area around the thin-walled section 2. At the same time, the transition surface 13 of the tangential connection 14 ensures the smooth flow of aluminum between different working surfaces and avoids the generation of flow dead zones or obstructions. The advantages are that the simple planar height difference design further optimizes the supply rhythm of aluminum material at both thick and thin wall sections, eliminating the need for complex flow guiding components. Beneficial effects include improved material supply rationality, reduced forming problems caused by improper material supply rhythm, and simple processing without significantly increasing mold costs, meeting low-cost requirements. Simultaneously, it ensures smooth aluminum material flow, contributing to improved aluminum profile quality.

[0021] The sidewall of the forming working belt 8 corresponding to the thick-walled section 1 is a non-vertical sidewall structure, which forms the front working belt 15, such as... Figure 1 , 2 As shown in Figures 3 and 5, the front working belt 15 has a structure with a large opening at the front end and a small opening at the rear end, extending from the inlet side 4 to the outlet side 5. An inclined sidewall is formed between the front and rear ends of the front working belt 15. This inclined sidewall allows for compression and flow restriction of the aluminum material in the thick-walled section 1. The large opening at the front facilitates aluminum material entry, while the small opening at the rear gradually reduces the space, controlling the outflow speed of the aluminum material and preventing excessively rapid outflow from the thick-walled section 1, which could lead to unstable molding or a significant difference in outflow speed compared to the thin-walled section 2. The advantage is that the flow speed of the aluminum material in the thick-walled section 1 is controlled through a simple change in the sidewall structure. This structure is simple, effective, and easy to process. It makes the molding process of the aluminum material in the thick-walled section 1 more stable, reducing quality problems caused by improper flow rate. Furthermore, in conjunction with other flow control structures, it further optimizes the overall outflow rhythm, ensuring the dimensional stability of the aluminum profile. This design does not significantly increase mold manufacturing costs, meeting the customer's low-cost requirements.

[0022] The depth of the front working belt 15 is 12mm, and the obstruction angle 16 formed by the inclination of the sidewall of the front working belt 15 is 8°. The specific depth and obstruction angle 16 are reasonable parameters verified in practice. The 12mm depth provides sufficient forming space for the aluminum material at the thick-walled section 1, while the 8° obstruction angle 16 effectively limits the flow without excessively hindering the flow of aluminum material and causing accumulation. The precise parameter settings ensure a balance between flow limiting and forming effect. This optimizes the flow and forming of aluminum material at the thick-walled section 1, further reducing quality problems and ensuring the quality and dimensional accuracy of the thick-walled section 1 of the aluminum profile. Moreover, this parametric design facilitates standardized mold processing, reducing manufacturing difficulty and cost.

[0023] The forming working belt 8 is provided with an accelerating inclined wall 17 at the thin-walled portion 2, such as... Figure 1 , 4 As shown in Figure 7, the accelerating inclined wall 17 is located on the side of the die hole cutter 18 of the working zone at the thin-walled section 2. The accelerating inclined wall 17 causes the working zone at the thin-walled section 2 to form a funnel-shaped structure with a gradually expanding opening towards the discharge side 5. Furthermore, the accelerating inclined wall 17 reduces the thickness of the working zone at the thin-walled section 2. The funnel-shaped structure facilitates faster flow of aluminum material from the thin-walled section 2. The gradually expanding opening reduces the resistance to aluminum flow, and the reduced working zone thickness lowers the forming resistance of the aluminum material at the thin-walled section 2, thereby accelerating the discharge speed of the aluminum material at the thin-walled section 2 and solving the problem of slow discharge leading to material shortage. This design is a precise solution to the problem of slow discharge at the thin-walled section 2, with a simple structure and direct effect. It effectively improves the discharge speed of the thin-walled section 2, avoids surface defects such as material shortage, and ensures the quality of the thin-walled section 2. At the same time, this structure is easy to implement in mold processing without significantly increasing costs, meeting low-cost requirements. Combined with the flow-limiting structure at the thick-walled section 1, it achieves a balance in the overall discharge speed, further improving the quality and dimensional stability of the aluminum profile.

[0024] The depth of the accelerating inclined wall 17 is 2.5mm, and the accelerating angle 19 formed by the accelerating inclined wall 17 is 8°. The 2.5mm depth and the 8° accelerating angle 19 are optimized parameters that ensure accelerated material output while avoiding unstable forming of the thin-walled section 2 due to excessive wall depth or angle. This ensures stable forming of the aluminum material while accelerating its flow. The parameter settings are scientific and reasonable, balancing material output speed and forming stability. This achieves an optimal balance between the material output speed and forming quality of the thin-walled section 2, further reducing quality problems at the thin-walled section 2, ensuring the overall quality and dimensional accuracy of the aluminum profile, and the standardized parameter design facilitates mold processing, reduces manufacturing costs, and meets customers' dual needs for low cost and high quality.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An industrial aluminum profile extrusion die with a large thickness difference, characterized in that, It includes an integrally formed extrusion die, which has a flat cylindrical structure, with one end being the feed side and the other end being the discharge side. A concave guide pit is provided on the feed side, the inner bottom surface of the guide pit is the feed surface, and a forming working belt is provided on the feed surface, the forming working belt having the same cross-sectional shape as the workpiece with a large thickness difference. The flow channel is configured as a narrow channel at the thick-walled part of the aluminum profile workpiece and as a wide channel at the thin-walled part of the aluminum profile workpiece.

2. The industrial aluminum profile extrusion die with large thickness difference according to claim 1, characterized in that, The feed surface corresponding to the thick-walled and thin-walled sections is not on the same plane. The feed surface includes a front working surface, a rear working surface, and a transition surface. The front working surface is set around the thick-walled section, and the rear working surface is set around the thin-walled section. The front working surface and the rear working surface are connected by a transition surface, and the front working surface, the rear working surface, and the transition surface are all tangentially connected.

3. The industrial aluminum profile extrusion die with large thickness difference according to claim 1, characterized in that, The sidewalls of the forming working belt at the thick-walled section are non-vertical sidewall structures, which form a front working belt. The front working belt has a structure with a large opening at the front end and a small opening at the rear end from the feeding side to the discharging side, forming an inclined sidewall-shaped front working belt between the front end and the rear end.

4. The industrial aluminum profile extrusion die with large thickness difference according to claim 3, characterized in that, The depth of the front working belt is 12mm, and the obstruction angle formed by the inclination of the side wall of the front working belt is 8°.

5. The industrial aluminum profile extrusion die with large thickness difference according to claim 1, characterized in that, The forming working belt is provided with an accelerating inclined wall at the thin-walled section. The accelerating inclined wall is located on the die hole empty knife side of the working belt at the thin-walled section. The accelerating inclined wall makes the working belt at the thin-walled section form a funnel-shaped structure with the opening gradually expanding towards the discharge side, and the accelerating inclined wall reduces the thickness of the working belt at the thin-walled section.

6. The industrial aluminum profile extrusion die with large thickness difference according to claim 5, characterized in that, The depth of the acceleration ramp is 2.5 mm, and the acceleration angle formed by the acceleration ramp is 8°.

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