Photovoltaic aluminum frame extrusion die with uniform molten metal distribution

Abstract

This application relates to the field of extrusion die technology, specifically to an extrusion die for photovoltaic aluminum frames with uniform melt distribution. The upper die of this extrusion die has two sets of flow holes, an outer ring and an inner ring. An inclined guide angle is set at the inlet of each flow hole. The inlet cross-sectional area of ​​the outer ring flow holes is designed to be larger than that of the inner ring flow holes, and the cross-sectional area of ​​each flow hole gradually increases along the flow direction. A nano-graphite lubricating layer is applied to the surface of the upper die, and a pressure sensor array is arranged circumferentially along the outermost flow hole inside the die cavity. The design of the flow hole distribution and cross-sectional area, as well as the application of the nano-graphite lubricating layer on the die cavity surface, reduces resistance, resulting in more uniform melt flow. The inclined guide angle at the inlet of the flow holes facilitates better melt inflow. Simultaneously, the pressure sensor array inside the die cavity monitors the uniformity of pressure distribution in real time, significantly improving the die's efficiency and product yield.

Description

Technical Field

[0001] This utility model relates to the field of extrusion die technology, specifically to a photovoltaic aluminum frame extrusion die with uniform melt distribution. Background Technology

[0002] With the rapid development of the photovoltaic industry, photovoltaic aluminum frames, as key structural components of modules, directly impact industry competitiveness through their production efficiency and product quality. Aluminum extrusion dies, as the core forming equipment, suffer from challenges due to uncontrolled molten metal flow and uneven fluidity caused by temperature variations at the molten metal's tip. This compromises the uniformity of the molten metal distribution within the extrusion die, thus limiting the die's performance. Therefore, improving the uniformity of molten metal distribution in photovoltaic aluminum frame extrusion dies is crucial for enhancing product quality and production efficiency.

[0003] Therefore, it is necessary to develop a new photovoltaic aluminum frame extrusion die with uniform melt distribution to ensure that the performance of the extruded material can be further improved. Utility Model Content

[0004] To address the problems of existing technologies, this invention proposes a photovoltaic aluminum frame extrusion die with uniform molten liquid distribution, the specific solution of which is as follows:

[0005] A photovoltaic aluminum frame extrusion die for uniform molten liquid distribution includes a circular upper die and a lower die. The upper die has flow-diverting holes with inclined guide angles at the inlets. There are two sets of flow-diverting holes, one set on the outer ring and one set on the inner ring. The ratio of the inlet cross-sectional area of ​​a single flow-diverting hole on the outer ring to that on the inner ring is 1.3-1.5:1. The flow-diverting holes on the outer and inner rings are staggered and symmetrical about the center of the upper die. The cross-sectional area of ​​the flow-diverting holes gradually increases along the flow direction. The ratio of the inlet cross-sectional area to the outlet cross-sectional area of ​​the outer ring diversion hole is 1:1.1-1.2, and the ratio of the inlet cross-sectional area to the outlet cross-sectional area of ​​the inner ring diversion hole is 1:1.2-1.3. A diversion bridge is formed between the diversion holes of the upper die, and the central part of the diversion bridge is the die core, which protrudes from the discharge end of the upper die. The lower die has a welding chamber corresponding to the diversion hole of the upper die, and the welding chamber is recessed in the top of the lower die. A discharge port is provided on the bottom surface of the lower die. A pressure sensor array is arranged circumferentially along the outermost diversion hole inside the upper die cavity of the extrusion die.

[0006] Furthermore, screw holes are provided at corresponding positions of the upper and lower molds, and they are fixedly connected by screws.

[0007] Furthermore, the angle between the inclined guide angle at the inlet of the diversion hole and the horizontal direction is 15°-25°.

[0008] Furthermore, the extrusion die is made of H13 steel.

[0009] Furthermore, the surface of the extrusion die is coated with a nano-graphite lubricating layer, wherein the nano-graphite has a particle size ≤200nm and the thickness of the nano-graphite lubricating layer is 5-8μm.

[0010] Furthermore, the diversion hole is elliptical.

[0011] In this invention, the flow dividers are designed with a centrally symmetrical distribution, and the inlet cross-sectional area of ​​the central flow divider is smaller than that of the outer flow dividers. This ensures that the molten liquid diffuses evenly from the center outwards. Generally, the molten liquid is more uniform at the center, but the flow is uneven around the edges. Therefore, the outer flow dividers are designed with a larger cross-sectional area to ensure that as much molten liquid as possible passes through, offsetting the uneven distribution of the molten liquid flow itself. In addition, the cross-sectional area of ​​the flow dividers gradually increases along the flow direction to compensate for the decrease in fluidity caused by the cooling of the molten liquid front end, resulting in a more uniform flow velocity, avoiding blockage, and reducing resistance. An inclined guide angle is set at the inlet of the flow dividers to facilitate better flow of the molten liquid. A nano-graphite lubricating layer is set on the surface of the mold cavity to reduce resistance, and a pressure sensor array is set in the mold cavity to monitor the uniformity of pressure distribution in real time, so that blockages or stagnation that are not conducive to uniform flow of the molten liquid can be detected in time. Attached Figure Description

[0012] The embodiments of this utility model will be further described below with reference to the accompanying drawings, wherein:

[0013] Figure 1 A schematic diagram of the upper mold structure of the mold in the embodiment is shown;

[0014] Figure 2 A schematic diagram of the lower mold structure of the mold in the embodiment is shown.

[0015] Among them, 1-upper mold, 2-outer ring diversion hole, 3-inner ring diversion hole, 4-diversion bridge, 5-mold core, 6-lower mold, 7-welding chamber, 8-outlet. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0017] In one embodiment, such as Figure 1-2As shown, an H13 steel photovoltaic aluminum frame extrusion die with uniform melt distribution is provided. The extrusion die includes a circular upper die 1 and a lower die 6. The upper die 1 has an elliptical flow-diverting hole. An inclined guide angle is provided at the entrance of the flow-diverting hole. The angle between the guide angle and the horizontal direction is 15°. There are two sets of diversion holes, one set on the outer ring and one set on the inner ring. The ratio of the inlet cross-sectional area of ​​a single outer ring diversion hole 2 to the inlet cross-sectional area of ​​an inner ring diversion hole 3 is 1.3:1. The diversion holes on the outer and inner rings are staggered and symmetrical about the center of the upper die. The cross-sectional area of ​​the diversion holes gradually increases along the flow direction. The ratio of the inlet cross-sectional area to the outlet cross-sectional area of ​​the outer ring diversion hole 2 is 1:1.1, and the ratio of the inlet cross-sectional area to the outlet cross-sectional area of ​​the inner ring diversion hole 3 is 1:1.3. A diversion bridge 4 is formed between the diversion holes of the upper die. The central part of the diversion bridge 4 is the die core 5, which protrudes from the discharge end of the upper die. The lower die 6 has a welding chamber 7 corresponding to the diversion holes of the upper die 1. The welding chamber 7 is recessed in the top of the lower die 6, and the bottom surface of the lower die 6 has a discharge port 8. A pressure sensor array is arranged circumferentially along the outermost diversion hole inside the die cavity of the upper die 1 of the extrusion die. The upper and lower dies have screw holes at corresponding positions for secure connection via screws. The surface of the extrusion die is coated with a nano-graphite lubricating layer; the nano-graphite particle size is ≤200nm, and the thickness of the nano-graphite lubricating layer is 5μm. In this embodiment, the molten liquid flows uniformly in the die, thereby increasing the yield of extruded materials from 85% to 95%, significantly improving production efficiency and demonstrating excellent application prospects.

[0018] The foregoing description describes some exemplary embodiments of this utility model. It is understood that the above embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model. The features in these embodiments can be recombine in a suitable manner, and the resulting solutions are still within the scope of protection claimed by this utility model. Based on the above embodiments, all other embodiments obtained by those skilled in the art without inventive effort, that is, all modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, fall within the scope of protection claimed by this utility model.

Claims

1. A photovoltaic aluminum frame extrusion die with uniform molten liquid distribution, characterized in that, The extrusion die includes a circular upper die (1) and a lower die (6). The upper die (1) has a flow divider hole. The inlet of the flow divider hole is provided with an inclined guide angle. There are two sets of flow dividers, one set on the outer ring and one set on the inner ring. The ratio of the inlet cross-sectional area of ​​a single outer ring flow divider hole (2) to the inlet cross-sectional area of ​​the inner ring flow divider hole (3) is 1.3-1.5:

1. The flow dividers on the outer and inner rings are staggered and symmetrical about the center of the upper die. The cross-sectional area of ​​the flow divider hole gradually increases along the flow direction. The ratio of the inlet cross-sectional area of ​​the outer ring flow divider hole (2) to the outlet cross-sectional area is... The ratio is 1:1.1-1.2, and the ratio of the inlet cross-sectional area to the outlet cross-sectional area of ​​the inner ring diversion hole (3) is 1:1.2-1.3; a diversion bridge (4) is formed between the diversion holes of the upper die, and the central part of the diversion bridge (4) is the die core (5), which protrudes from the discharge end of the upper die; the lower die (6) has a welding chamber (7) corresponding to the diversion hole of the upper die (1), which is recessed in the top of the lower die (6), and a discharge port (8) is opened on the bottom surface of the lower die (6); a pressure sensor array is arranged circumferentially along the outermost diversion hole in the cavity of the upper die (1) of the extrusion die.

2. The photovoltaic aluminum frame extrusion die according to claim 1, characterized in that, The upper and lower molds are provided with screw holes at corresponding positions and are fixedly connected by screws.

3. The photovoltaic aluminum frame extrusion die according to claim 1, characterized in that, The angle between the inclined guide angle at the inlet of the diversion hole and the horizontal direction is 15°-25°.

4. The photovoltaic aluminum frame extrusion die according to claim 1, characterized in that, The extrusion die is made of H13 steel.

5. The photovoltaic aluminum frame extrusion die according to claim 4, characterized in that, The surface of the extrusion die is coated with a nano-graphite lubricating layer, wherein the nano-graphite has a particle size ≤200nm and the thickness of the nano-graphite lubricating layer is 5-8μm.

6. The photovoltaic aluminum frame extrusion die according to claim 1, characterized in that, The diversion orifice is elliptical.

Images