A distributor co-extrusion EVA-POE-EVA solar composite film extrusion die

Abstract

The application provides a distributor co-extrusion type EVA-POE-EVA solar composite film extrusion die, which comprises an upper die body, a lower die body and a feeding channel, a shaping extrusion channel is arranged between the front end regions of the upper die body and the lower die body, a material shaping area is arranged between the feeding channel and the shaping extrusion channel, the material shaping area comprises a main runner inflow area, a main runner contraction area, a triangular area and a steady flow area from back to front, the runner height of the main runner contraction area in different width directions is reduced by the same inclination angle, the triangular area is outwardly convex relative to the surface of the steady flow area, the front end center of the triangular area is in the middle region of the die body, and the triangular area is inclined to form a triangular structure from the middle to both sides in the width direction, the runner height of the front part of the steady flow area is gradually reduced from back to front, and the runner height of the front end of the steady flow area is consistent with the runner height of the shaping extrusion channel. The application can ensure the quality of the extruded EVA solar film and improve the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of solar encapsulation film production technology, and in particular to a distributor co-extrusion type EVA-POE-EVA solar composite film extrusion die. Background Technology

[0002] Solar encapsulation films are primarily used for encapsulating solar panels. As a transparent, adhesive material, it secures the solar cells to the glass, helping to improve cell performance and lifespan. Conventional EVA solar film extrusion dies cannot precisely control extrusion pressure, temperature, and speed, potentially leading to defects such as inconsistent film thickness or uneven stretching, and resulting in low production efficiency. Summary of the Invention

[0003] To address the aforementioned issues, this invention aims to provide a distributor co-extrusion type EVA-POE-EVA solar composite film extrusion die, which enables the EVA solar film to have better uniformity and quality, and can improve production efficiency.

[0004] The technical solution of this invention is a distributor co-extrusion type EVA-POE-EVA solar composite film extrusion die, including an upper die body and a lower die body. A feeding channel is provided between the middle rear regions of the upper and lower die bodies, and a shaping extrusion channel is provided between the front end regions of the upper and lower die bodies. A material shaping zone is provided between the feeding channel and the shaping extrusion channel. The material shaping zone includes, from back to front, a main channel inflow zone, a main channel contraction zone, a triangular zone, and a flow stabilization zone. The flow channel height of the main channel inflow zone and the feeding channel... The height of the main flow channel corresponds to the height of the main flow channel contraction zone. The height of the main flow channel contraction zone at the front end corresponds to the height of the flow channel of its front triangular area. The triangular area protrudes outward relative to the surface of the stabilizing flow zone. Its front center is located in the middle area of ​​the mold body and tilts backward from the middle to both sides in the width direction to form a triangular structure. The height of the flow channel at the front of the stabilizing flow zone gradually decreases from back to front. The height of the flow channel at the front end of the stabilizing flow zone is consistent with the height of the flow channel of the shaping extrusion channel.

[0005] Preferably, the main channel inflow area and the main channel contraction area have a forward-sloping arc-shaped structure at both ends.

[0006] Preferably, the total cross-sectional area of ​​the main channel inflow area and the main channel contraction area is ≥2539mm² at the left and right ends, and the total cross-sectional area of ​​the main channel inflow area and the main channel contraction area is ≥2969mm² in the middle region.

[0007] Preferably, the angle of inclination of the change in height of the main channel contraction zone relative to the plane of the mold body is 30°.

[0008] Preferably, a fine-tuning groove is provided at the front end of the upper mold body along the width direction. A series of manual fine-tuning screws are evenly distributed on the upper mold body above the fine-tuning groove along the width direction. The upper mold body in front of the fine-tuning groove forms an upper mold lip. The front end of the manual fine-tuning screw is held against the upper mold lip. The height of the shaping extrusion channel is adjusted by the deformation of the fine-tuning groove caused by the manual fine-tuning screw pressing the upper mold lip.

[0009] Preferably, the upper mold body and the lower mold body are provided with multiple oil temperature adjustment holes along the width direction.

[0010] This invention optimizes the structure of the material shaping zone, reduces the error in the extrusion speed of the discharge layer, increases production capacity, improves production efficiency, optimizes the manual push-type die lip adjustment device, improves the uniformity of die lip adjustment, and adds oil temperature adjustment holes for the die lip and die body to achieve stable temperature control. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the flow channel structure of the present invention; Figure 4 This is a schematic diagram of the structure of the upper mold body and the lower mold body surface in this invention; Figure 5 for Figure 4 A structural diagram from another perspective; Wherein: 1—Upper mold body; 2—Lower mold body; 3—Feeding channel; 4—Shaping extrusion channel; 5—Material shaping zone; 51—Main flow channel inflow zone; 52—Main flow channel shrinkage zone; 53—Triangle zone; 54—Flow stabilization zone; 6—Fine adjustment groove; 7—Manual fine adjustment screw; 8—Upper mold lip; 9—Oil temperature adjustment hole. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings.

[0013] like Figures 1 to 5As shown, this invention provides a distributor co-extrusion type EVA-POE-EVA solar composite film extrusion die, including an upper die body 1 and a lower die body 2. A feeding channel 3 is provided between the middle rear regions of the upper die body 1 and the lower die body 2, and a shaping extrusion channel 4 is provided between the front end regions of the upper die body 1 and the lower die body 2. A material shaping zone 5 is provided between the feeding channel 3 and the shaping extrusion channel 4. The material shaping zone 5 includes, from back to front, a main channel inflow zone 51, a main channel contraction zone 52, a triangular zone 53, and a flow stabilization zone 54. The flow channel height of the main channel inflow zone 51 and... Corresponding to the height of the feed channel 3, the height of the main channel contraction zone 52 decreases at the same angle in different width directions. The height of the front end of the main channel contraction zone 52 corresponds to the height of the front triangular zone 53. The triangular zone 53 protrudes outward relative to the surface of the flow stabilizing zone 54, and its front center is located in the middle area of ​​the mold body. It tilts backward from the middle to both sides in the width direction to form a triangular structure. The height of the flow stabilizing zone 54 at the front end gradually decreases from back to front. The height of the flow stabilizing zone 54 at the front end is consistent with the height of the flow stabilizing extrusion channel 4.

[0014] In the above scheme, the main channel inflow area 51 and the main channel contraction area 52 have a forward-sloping arc-shaped structure at both ends.

[0015] The total cross-sectional area of ​​the main channel inflow area 51 and the main channel contraction area 52 is ≥2539mm² at the left and right ends, and the total cross-sectional area of ​​the main channel inflow area 51 and the main channel contraction area 52 is ≥2969mm² in the middle region.

[0016] Specifically, the change in height of the main channel contraction zone 52 is tilted at an angle of 30° relative to the plane of the mold body.

[0017] Furthermore, a fine-tuning groove 6 is provided at the front end of the upper mold body 1 along the width direction. A series of manual fine-tuning screws 7 are evenly distributed along the width direction on the upper mold body 1 above the fine-tuning groove 6. An upper mold lip 8 is formed on the front side of the upper mold body 1 of the fine-tuning groove 6. The front end of the manual fine-tuning screw 7 rests on the upper mold lip 8. By pressing the upper mold lip 8 with the manual fine-tuning screw 7, the fine-tuning groove 6 is deformed, thereby adjusting the height of the shaping extrusion channel 4. During normal extrusion, excessive pressure on the lip is avoided to prevent deformation, which could cause the fine-tuning screws to fail to tighten the mold lip. This ensures that the opening size of the mold lip can be adjusted evenly, guaranteeing the uniformity of the product's thickness.

[0018] In addition, the upper mold body 1 and the lower mold body 2 are provided with multiple oil temperature adjustment holes 9 along the width direction, which can ensure temperature stability and thus guarantee product stability.

[0019] By designing the internal structure of the material shaping zone 5, this invention can reduce the flow velocity difference at different locations in the width direction, making the fluid flow velocity uniform across different widths, ensuring the extrusion quality of the product, and improving production efficiency.

[0020] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A distributor co-extrusion type EVA-POE-EVA solar composite film extrusion die, comprising an upper die body (1) and a lower die body (2), wherein a feeding channel (3) is provided between the rear middle region of the upper die body (1) and the lower die body (2), and a shaping extrusion channel (4) is provided between the front end region of the upper die body (1) and the lower die body (2), characterized in that: A material shaping area (5) is provided between the feeding channel (3) and the shaping extrusion channel (4). The material shaping area (5) includes, from back to front, a main channel inflow area (51), a main channel contraction area (52), a triangular area (53), and a flow stabilization area (54). The flow channel height of the main channel inflow area (51) corresponds to the flow channel height of the feeding channel (3). The flow channel height of the main channel contraction area (52) decreases at the same angle in different width directions. The flow channel height at the front end of the main channel contraction area (52) corresponds to the flow channel height of its front triangular area (53). The surface of the triangular area (53) protrudes outward relative to the flow stabilization area (54), and its front center is located in the middle area of ​​the mold body. The width direction slopes backward from the middle to both sides to form a triangular structure; the height of the flow channel at the front of the flow stabilizing zone (54) gradually decreases from back to front, and the flow channel height at the front end of the flow stabilizing zone (54) is consistent with the flow channel height of the shaping extrusion channel (4); the main flow channel inflow area (51) and the main flow channel contraction area (52) are arc-shaped structures that slope forward at the left and right ends; the total cross-sectional area of ​​the main flow channel inflow area (51) and the main flow channel contraction area (52) is ≥2539mm² at the left and right ends, and the total cross-sectional area of ​​the main flow channel inflow area (51) and the main flow channel contraction area (52) is ≥2969mm² in the middle area; the angle of inclination of the change in height of the main flow channel contraction area (52) relative to the mold plane is 30°.

2. The distributor co-extrusion type EVA-POE-EVA solar composite film extrusion die according to claim 1, characterized in that: The upper mold body (1) has a fine-tuning groove (6) at the front end along the width direction. A series of manual fine-tuning screws (7) are evenly distributed on the upper mold body (1) above the fine-tuning groove (6) along the width direction. The upper mold body (1) in front of the fine-tuning groove (6) forms an upper mold lip (8). The front end of the manual fine-tuning screw (7) is held on the upper mold lip (8). The height of the shaping extrusion channel (4) is adjusted by the deformation of the fine-tuning groove (6) caused by the manual fine-tuning screw (7) pressing the upper mold lip (8).

3. The distributor co-extrusion type EVA-POE-EVA solar composite film extrusion die according to claim 1, characterized in that: The upper mold body (1) and the lower mold body (2) are provided with multiple oil temperature adjustment holes (9) along the width direction.

Images