A temperature-controlled zoned die head device for casting photovoltaic reflective film

Abstract

This invention discloses a temperature-controlled, zoned die head device for casting photovoltaic reflective films, belonging to the field of photovoltaic reflective film preparation technology. The invention includes a die head with a feeding channel inside and a conveying channel at the bottom. The invention uses a threaded rod to drive a T-block, which in turn drives an adjusting plate to make precise linear displacement. This allows for direct and minute changes to the size of the local opening in the die lip, compensating for uneven lateral discharge flow caused by slight differences in material properties or temperature. Simultaneously, the rigid sliding pair formed by the sliders on both sides and the guide rod ensures the stability and straightness of the adjusting plate's movement under high-temperature conditions, effectively eliminating the uncontrollability and lag of traditional manual adjustment. This enables the die head to achieve online, continuous, and precise adjustment of the film thickness profile, fundamentally solving the thickness fluctuation problem of wide-width photovoltaic reflective films and ensuring extremely high optical uniformity and surface flatness of the film.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic reflective film preparation technology, specifically a temperature-controlled partitioned die head device for casting photovoltaic reflective film. Background Technology

[0002] As a key functional film for improving the power generation efficiency of photovoltaic modules, photovoltaic reflective film has extremely high requirements for film uniformity, surface smoothness, and optical performance in its preparation process. Casting is one of the mainstream processes for preparing this type of film, and the design of its core component, the die head, directly affects the stability of melt flow and the uniformity of output, thus determining the thickness consistency and surface quality of the film.

[0003] Traditional casting dies typically employ an integral structure with a fixed internal flow channel design. When producing photovoltaic reflective films of different specifications or materials, it is difficult to flexibly and precisely adjust the local width of the die lip opening to adapt to changes in material properties or process parameters. Therefore, a temperature-controlled zoned die device for casting photovoltaic reflective films is proposed to overcome the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a temperature-controlled partitioned die head device for casting photovoltaic reflective film, so as to solve the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model relates to a temperature-controlled partitioned die head device for casting photovoltaic reflective film. It includes a die head with a feeding channel inside. A conveying channel is located at the bottom of the feeding channel. An installation groove is located on one side of the bottom of the die head. Sliding grooves are located on both sides of the top of the installation groove. Guide rods are installed inside the two sliding grooves, and sliders are fitted onto the two guide rods. A T-shaped groove is located in the middle of the top of the installation groove. A threaded rod is installed inside the T-shaped groove, and a T-shaped block is fitted onto the threaded rod. Adjustment plates are located at the bottom of the T-shaped block and the two sliders, and the adjustment plates are located on one side of the conveying channel.

[0007] Furthermore, the slider has a sliding hole, through which the slider slides and engages with the guide rod.

[0008] Furthermore, the T-block has a threaded hole, and the T-block is threaded onto the threaded rod through the threaded hole.

[0009] Furthermore, bearings are provided at both ends of the T-slot, and the two ends of the threaded rod are respectively set in the inner rings of the two bearings.

[0010] Furthermore, a cross groove is provided at one end of the threaded rod.

[0011] This utility model has the following beneficial effects:

[0012] 1. This utility model uses a threaded rod to drive a T-shaped block, which in turn drives an adjusting plate to make precise linear displacement. This allows for direct and minute changes to the size of the local opening of the die lip, thereby compensating for uneven lateral discharge flow caused by slight differences in material properties or temperature. At the same time, the rigid sliding pair formed by the sliders on both sides and the guide rod ensures the stability and straightness of the adjusting plate's movement under high-temperature conditions. This effectively eliminates the uncontrollability and lag of traditional manual adjustment, enabling the die head to achieve online, continuous, and precise adjustment of the film thickness profile. This fundamentally solves the problem of thickness fluctuation in wide-width photovoltaic reflective films and ensures extremely high optical uniformity and surface flatness of the film.

[0013] 2. This utility model employs a nested combination of T-slots and T-blocks, supplemented by symmetrical guide rod slider pairs on both sides, forming a statically indeterminate, deformation-resistant rigid support and guiding system. This effectively resists deformation that may occur in the die head body under long-term heating and internal melt pressure, ensuring that the reference accuracy of the adjustment mechanism remains unaffected. Simultaneously, the threaded drive method transmits high torque and has good self-locking properties; after adjustment, no additional locking is required to maintain an absolutely fixed position, avoiding spontaneous drift during production and greatly improving production repeatability and long-term equipment reliability.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the die head;

[0016] Figure 2 This is a schematic diagram of the mold head and adjusting plate structure;

[0017] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0018] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0019] Figure 5 This is a schematic diagram of the internal structure of the mold head.

[0020] In the diagram: 1. Die head; 11. Feeding channel; 12. Conveying channel; 13. Mounting groove; 14. Slide groove; 15. Guide rod; 16. T-slot; 17. Threaded rod; 2. Adjusting plate; 21. Slider; 22. Sliding hole; 23. T-block; 24. Threaded hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5This utility model provides a technical solution: a temperature-controlled partitioned die head device for casting photovoltaic reflective film, including a die head 1. The die head 1 has a feeding channel 11 inside, and a conveying channel 12 is formed at the bottom of the feeding channel 11. The feeding channel 11 and the conveying channel 12 constitute the basic flow path of the melt from the extruder into the die head 1 to the die lip outlet. A mounting groove 13 is formed on one side of the bottom of the die head 1, providing mounting space and a base for the entire adjustment mechanism. Sliding grooves 14 are formed on both sides of the top of the mounting groove 13, and guide rods 15 are welded into the interior of each of the two sliding grooves 14. A slider 21 is slidably fitted onto the rod 15. The slider 21 has a sliding hole 22, and it slides onto the groove 14 through the sliding hole 22. The groove 14, guide rod 15, and slider 21 constitute a linear motion guiding system on both sides of the adjusting plate 2, forcibly constraining the adjusting plate 2 to move linearly only along the axial direction of the guide rod 15, eliminating any possibility of lateral swaying or tilting. Simultaneously, the fit between the slider 21 and guide rod 15 has less frictional resistance compared to planar sliding, resulting in smoother movement and facilitating fine-tuning. A T-shaped groove 16 is formed at the top center of the mounting groove 13, and a threaded rod 1 is rotatably fitted inside the T-shaped groove 16. 7. Bearings are welded to both ends of the T-slot 16. The two ends of the threaded rod 17 are welded to the inner rings of the two bearings. The bearings significantly reduce the rotational friction torque of the threaded rod 17, making adjustment easier and less strenuous. They also ensure the threaded rod 17 rotates concentrically, preventing jamming and extending its service life. One end of the threaded rod 17 has a cross-shaped groove, which serves as the drive interface, providing a standardized and universal operating interface. It can be operated using a screwdriver or a special wrench, making it simple and intuitive, reducing operational difficulty. A T-block 23 is fitted onto the threaded rod 17, and the T-block 23 has a threaded hole 24. Block 23 is threaded onto threaded rod 17 via threaded hole 24. T-slot 16, threaded rod 17, and T-block 23 constitute the core drive and position locking system of adjusting plate 2. The threaded pair converts rotational motion into precise linear displacement, achieving micron-level adjustment accuracy. The thread has inherent self-locking properties, eliminating the need for additional locking after adjustment, ensuring absolute position fixation. Adjusting plate 2 is welded to the bottom of T-block 23 and the two sliders 21. Located on one side of material conveying channel 12, adjusting plate 2 is the final actuator of the adjusting mechanism. Its cutting edge forms one side of the die lip. Linear movement of adjusting plate 2 directly changes the width of the local die lip gap. Narrowing the gap increases flow resistance and reduces material output; conversely, widening the gap increases material output.

[0023] By rotating the threaded rod 17, the T-block 23 is driven to move, which in turn drives the slider 21 and the adjusting plate 2 to move, thereby driving the adjusting plate 2 to perform a linear displacement at the micrometer level, thereby locally changing the die lip gap and achieving direct and precise intervention on the melt flow rate.

[0024] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A temperature-controlled zoned die head device for casting photovoltaic reflective film, comprising a die head (1), characterized in that: The die head (1) has a feeding channel (11) inside, and a conveying channel (12) is provided at the bottom of the feeding channel (11). The bottom side of the mold head (1) is provided with an installation groove (13), and the top sides of the installation groove (13) are respectively provided with sliding grooves (14). The interior of the two sliding grooves (14) is provided with guide rods (15), and the two guide rods (15) are respectively fitted with sliders (21). A T-shaped groove (16) is provided at the top center of the mounting groove (13), and a threaded rod (17) is provided inside the T-shaped groove (16), and a T-shaped block (23) is fitted on the threaded rod (17). The bottom of the T-shaped block (23) and the two sliders (21) are provided with adjustment plates (2), which are located on one side of the material conveying channel (12).

2. The temperature-controlled zoned die head device for casting photovoltaic reflective film according to claim 1, characterized in that, The slider (21) has a sliding hole (22) and the slider (21) slides on the guide rod (15) through the sliding hole (22).

3. The temperature-controlled zoned die head device for casting photovoltaic reflective film according to claim 1, characterized in that, The T-shaped block (23) has a threaded hole (24), and the T-shaped block (23) is threaded onto the threaded rod (17) through the threaded hole (24).

4. The temperature-controlled zoned die head device for casting photovoltaic reflective film according to claim 1, characterized in that, The T-groove (16) has bearings at both ends, and the threaded rod (17) has its ends set in the inner rings of the two bearings.

5. A temperature-controlled zoned die head device for casting photovoltaic reflective film according to claim 1, characterized in that, One end of the threaded rod (17) has a cross groove.

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