Photovoltaic aluminum frame extrusion die

Abstract

The invention relates to the technical field of photovoltaic aluminum frame machining, in particular to a photovoltaic aluminum frame extrusion die. The extrusion die comprises a circular upper die body and a circular lower die body, the upper die body is provided with an outer ring and an inner ring, the outer ring flow dividing holes comprise outer triangular flow dividing holes and square flow dividing holes, and the inner ring flow dividing holes comprise two water-drop-shaped flow dividing holes and inner triangular flow dividing holes. The two shunting holes of the inner ring or the outer ring are in central symmetry about the circle center of the upper die and are in axial symmetry about two perpendicular diameters, the sectional area of the shunting hole of the outer ring is larger than that of the shunting hole of the inner ring, a shunting bridge is formed between the shunting holes, the width of the shunting bridge is not smaller than one tenth of the radius of the upper die, and the die core protrudes out of the discharging end of the upper die. According to the extrusion die, by designing the flow dividing holes with different shapes, sizes and relative positions, the flow path of metal is optimized, so that the metal can flow uniformly and stably, the production efficiency is improved, and the die is good in strength and stability and not prone to deformation or cracking.

Description

Technical Field

[0001] The present invention relates to the technical field of processing of photovoltaic aluminum frames, and particularly relates to an extrusion die for photovoltaic aluminum frames. Background Art

[0002] With the rapid development of the photovoltaic industry, as a key structural component of the module, the production efficiency and product quality of photovoltaic aluminum frames directly affect the industry competitiveness. As the core forming equipment, the design of the distribution holes of the aluminum extrusion die directly determines the uniformity of material flow and product performance. In the current mainstream technology, the distribution die optimizes the metal flow through a porous structure, but in actual applications, it is still limited by the small number of holes, which easily leads to uneven metal flow velocity. Especially in the production of profiles with complex cross-sections, problems such as wall thickness deviation, surface scratches, and unstable weld quality are likely to occur. In addition, the matching degree between the layout of the distribution holes and the cavity is insufficient, often resulting in a high residual amount of waste aluminum in the die cavity and limited material utilization rate. Although the adjustable distribution die improves the adaptability through hole parameter adjustment, its structure is complex, the manufacturing cost is high, and it is difficult to accurately balance the flow uniformity and die strength. Although special distribution dies such as the shielding type and the substitution type are optimized for the cantilever structure, they have limitations such as a narrow application range and high maintenance costs. Summary of the Invention

[0003] Therefore, based on the problems in the prior art, the present invention proposes an extrusion die for photovoltaic aluminum frames, which improves the single-pass throughput and has a better metal flow path. The specific solutions are as follows:

[0004] An extrusion die for photovoltaic aluminum frames includes a circular upper die and a lower die. The upper die is provided with distribution holes. There are two groups of the distribution holes. One group of the two groups of distribution holes is on the outer circle and the other group is on the inner circle: The outer circle distribution holes include outer triangular distribution holes and square distribution holes. For each outer triangular distribution hole, the two adjacent sides are a square distribution hole and an outer triangular distribution hole. The two types of distribution holes on the outer circle are centrosymmetric about the center of the upper die and axisymmetric about two perpendicular diameters; The inner circle distribution holes include two water-drop-shaped distribution holes and an inner triangular distribution hole. The straight line connecting the two water-drop-shaped distribution holes passes through the center of the upper die. The inner triangular distribution hole is arranged between the two water-drop-shaped distribution holes. The two types of distribution holes on the inner circle are centrosymmetric about the center of the upper die and axisymmetric about two perpendicular diameters; The cross-sectional area of the distribution holes on the outer circle is larger than that of the distribution holes on the inner circle; A distribution bridge is formed between the distribution holes of the upper die. The width of the distribution bridge is not less than one-tenth of the radius of the upper die. The center of the upper die is a die core. The die core protrudes from the discharging end of the upper die. The die core is connected to the distribution bridge; Corresponding positions of the upper die and the lower die are provided with screw holes and are fixedly connected by screws.

[0005] Further, a welding chamber corresponding to the distribution holes of the upper die is opened at the top of the lower die. The welding chamber is concave from the top of the lower die and is communicated with the distribution holes.

[0006] Further, a die cavity is communicated below the bonding chamber.

[0007] Further, among the flow dividing holes of the outer ring, two adjacent outer triangular flow dividing holes are adjacent at two corners, and an adjacent outer triangular flow dividing hole and a square flow dividing hole are adjacent at two sides.

[0008] Further, among the flow dividing holes of the inner ring, two adjacent inner triangular flow dividing holes are adjacent at two sides, and the tips of two water-drop-shaped flow dividing holes face each other.

[0009] Further, there are at least 4 square flow dividing holes and at least 4 outer triangular flow dividing holes in the flow dividing holes of the outer ring.

[0010] Further, there are at least 4 inner triangular flow dividing holes in the flow dividing holes of the inner ring.

[0011] Further, the cross-sectional area of the flow dividing holes of the outer ring is 1.2 - 1.5 times that of the flow dividing holes of the inner ring.

[0012] The beneficial effects of the present invention are as follows: By designing flow dividing holes with different shapes, sizes and relative positions, increasing the number of flow dividing holes, and optimizing the metal flow path, the extrusion die of the present invention has good strength and stability and is not prone to deformation or cracking during the extrusion process. The optimized metal flow path enables the metal to flow evenly and stably, and also increases the single-pass amount. Based on this optimized metal flow path, the extrusion speed can also be significantly increased, improving the production efficiency, reducing the wear and deformation of the die, thereby prolonging the service life of the die and reducing the maintenance frequency. At the same time, the amount of residual aluminum in the optimized die is greatly reduced, improving the utilization rate of aluminum materials, reducing the production cost, and also reducing the environmental pollution. Description of the Drawings

[0013] The following further describes the embodiments of the present invention with reference to the drawings, wherein:

[0014] Figure 1 shows a top view structural schematic diagram of the die in the embodiment;

[0015] Figure 2 shows Figure 1 a front view structural schematic diagram of the A-A section in

[0016] Figure 3 shows a structural schematic diagram of a comparative 8-hole strip-shaped flow dividing die in the embodiment.

[0017] Wherein, 1 - upper die, 2 - outer triangular flow dividing hole, 3 - square flow dividing hole, 4 - inner triangular flow dividing hole, 5 - water-drop-shaped flow dividing hole, 6 - flow dividing bridge, 7 - die core, 8 - lower die, 9 - bonding chamber, 10 - die cavity. Detailed implementation manners

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] In one embodiment, as shown in the Figure 1 accompanying drawings, a photovoltaic aluminum frame extrusion die includes a circular upper die 1 and a circular lower die 8. The upper die 1 is provided with shunt holes. There are two groups of shunt holes. One group of the two groups of shunt holes is on the outer circle and the other group is on the inner circle: the outer circle shunt holes include four outer triangular shunt holes 2 and four square shunt holes 3. For each outer triangular shunt hole 2, the two adjacent sides are a square shunt hole 3 and an outer triangular shunt hole 2. The two types of shunt holes on the outer circle are centrosymmetric about the center of the upper die and axially symmetric about two perpendicular diameters. Among the shunt holes on the outer circle, two adjacent outer triangular shunt holes 2 have two adjacent corners and are located on the upper and lower sides of the upper die. The adjacent outer triangular shunt hole 2 and square shunt hole 3 have two adjacent sides. The four square shunt holes 3 are respectively located on the left and right sides of the upper die; the inner circle shunt holes include two drop-shaped shunt holes 5 and an inner triangular shunt hole 4. The straight line connecting the two drop-shaped shunt holes 5 passes through the center of the upper die. The inner triangular shunt hole 4 is arranged between the two drop-shaped shunt holes 5. The two types of shunt holes on the inner circle are centrosymmetric about the center of the upper die and axially symmetric about two perpendicular diameters. Among the shunt holes on the inner circle, two adjacent inner triangular shunt holes 4 have two adjacent sides, that is, as shown in the Figure 1 accompanying drawings, the bases of two isosceles triangles are adjacent and symmetric about the horizontal diameter. There are a total of four inner triangular shunt holes 4, and the tips of the two drop-shaped shunt holes 5 face each other; the cross-sectional area of the shunt holes on the outer circle is 1.2 - 1.5 times that of the shunt holes on the inner circle; a shunt bridge 6 is formed between the shunt holes of the upper die. The width of the shunt bridge 6 is not less than one-tenth of the radius of the upper die 1. The center of the upper die is a die core 7. The die core 7 protrudes from the discharging end of the upper die, and the die core 7 is connected to the shunt bridge 6; screw holes are provided at corresponding positions of the upper die and the lower die and are fixedly connected by screws. A welding chamber 9 corresponding to the shunt holes of the upper die 1 is provided at the top of the lower die 8. The welding chamber 9 is concave in the top of the lower die 8 and communicates with the shunt holes. A die cavity 10 is communicated below the welding chamber 9.

[0020] The average single-pass throughput of this die is as high as 2482 KG, showing a significant increase compared to the average single-pass throughput of 1750 KG of the 8-hole strip-shaped splitter die; and the residual aluminum amount of the die in this embodiment is only 0.6 kg, significantly less than 2.2 kg of the 8-hole die; at the same time, when producing profile JA1171 under the same conditions, the extrusion speed of the die in this embodiment can be stabilized at 8.6 m / min, significantly higher than 7.0 m / min of the 8-hole die. The production efficiency is improved, and the profiles produced by the splitter die in this embodiment have higher quality and smoother surfaces.

[0021] Some exemplary embodiments of the present invention have been described above. It can be understood that the above embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention. The features in these embodiments can be recombined in a suitable manner, and the solutions obtained thereby are still within the protection scope required by the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without creative efforts, that is, all modifications, equivalent replacements, and improvements made within the spirit and principle of this application, fall within the protection scope required by the present invention.

Claims

1. A photovoltaic aluminum frame extrusion die, comprising a circular upper die (1) and a lower die (8), wherein the upper die (1) is provided with a diversion hole, characterized in that: There are two groups of diverter holes, one group of which is in the outer circle and the other group is in the inner circle: the diverter holes in the outer circle include outer triangular diverter holes (2) and square diverter holes (3), each outer triangular diverter hole (2) has two adjacent sides with a square diverter hole (3) and an outer triangular diverter hole (2), the two diverter holes in the outer circle are symmetrical about the center of the circle of the upper mold and axially symmetrical about two perpendicular diameters; the diverter holes in the inner circle include two water drop-shaped diverter holes (5) and an inner triangular diverter hole (4), the straight line connecting the two water drop-shaped diverter holes (5) passes through the center of the upper mold, the inner triangular diverter holes (4) are connected to the inner triangular diverter holes (5) and the inner triangular diverter holes (4). The flow hole (4) is opened between two teardrop-shaped diversion holes (5), and the two diversion holes of the inner circle are symmetrical about the center of the circle of the upper mold and axially symmetrical about two vertical diameters; the cross-sectional area of ​​the diversion holes of the outer circle is larger than the cross-sectional area of ​​the diversion holes of the inner circle; a diversion bridge (6) is formed between the diversion holes of the upper mold, and the width of the diversion bridge (6) is not less than one tenth of the radius of the upper mold (1); the center of the upper mold is a mold core (7), and the mold core (7) protrudes from the discharge end of the upper mold, and the mold core (7) is connected to the diversion bridge (6); screw holes are opened at corresponding positions of the upper mold and fixedly connected by screws.

2. The photovoltaic aluminum frame extrusion die according to claim 1, characterized in that: A welding chamber (9) corresponding to the diversion hole of the upper mold (1) is provided at the top of the lower mold (8); the welding chamber (9) is recessed at the top of the lower mold (8) and communicated with the diversion hole.

3. The photovoltaic aluminum frame extrusion die according to claim 2, characterized in that: The welding chamber (9) is connected to a mold cavity (10) below.

4. The photovoltaic aluminum frame extrusion die according to claim 1, characterized in that: Among the flow diversion holes of the outer ring, two adjacent outer triangular flow diversion holes (2) have two adjacent corners, and two adjacent outer triangular flow diversion holes (2) and square flow diversion holes (3) have two adjacent sides.

5. The photovoltaic aluminum frame extrusion die according to claim 1, characterized in that: In the flow diversion holes of the inner circle, two adjacent inner triangular flow diversion holes (4) have two adjacent sides, and the tips of the two water drop-shaped flow diversion holes (5) face each other.

6. The photovoltaic aluminum frame extrusion die according to claim 1, characterized in that: The flow diversion holes of the outer ring include at least four square flow diversion holes (3) and at least four outer triangular flow diversion holes (2).

7. The photovoltaic aluminum frame extrusion die according to claim 1, characterized in that: The inner ring of flow diversion holes has at least four inner triangular flow diversion holes (4).

8. The photovoltaic aluminum frame extrusion die according to claim 1, characterized in that: The cross-sectional area of ​​the diverter hole of the outer ring is 1.2-1.5 times the cross-sectional area of ​​the diverter hole of the inner ring.

Images